CN101227096B - Hybrid battery and charging/discharging method - Google Patents

Hybrid battery and charging/discharging method Download PDF

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Publication number
CN101227096B
CN101227096B CN2008100023544A CN200810002354A CN101227096B CN 101227096 B CN101227096 B CN 101227096B CN 2008100023544 A CN2008100023544 A CN 2008100023544A CN 200810002354 A CN200810002354 A CN 200810002354A CN 101227096 B CN101227096 B CN 101227096B
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battery
discharge
charge
switch element
hybrid
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CN101227096A (en
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金奉永
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Samsung SDI Co Ltd
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Samsung SDI Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

A hybrid battery and its charging/discharging method automatically charges/discharges batteries having different capacities. The hybrid battery includes a plurality of rechargeable batteries; switching elements which are electrically connected to the plurality of rechargeable batteries; and a hybrid battery protection circuit electrically connected to the plurality of rechargeable batteries and driven by power supplied by one of the plurality of rechargeable batteries, the hybrid battery protection circuit charging/discharging the plurality of rechargeable batteries in sequence by transmitting an on/off signal to the switching elements.

Description

Hybrid battery and charging/discharging method thereof
The requirement of priority
Priority and the rights and interests of the korean patent application No.10-2007-0005429 that the application requires to submit on January 17th, 2007, the korean patent application No.10-2007-0005430 that submits on January 17th, 2007 and the korean patent application No.10-2007-0109721 that submits on October 30th, 2007, the full content of above-mentioned application is herein incorporated by reference.
Technical field
The present invention relates to hybrid battery and charging/discharging method thereof, more particularly, the present invention relates to have the automatic charge/discharge battery of different capabilities.
Background technology
Recently, compact and light and handy portable electric/electronic equipment is developed fast and produced, comprise cell phone, notebook computer, camcorder etc.Correspondingly, portable electric/electronic equipment has built-in battery pack, so that can operate said equipment in the place that can't supply with separate power supplies.Consider economic factor, the battery that the nearest employing of battery pack can be charged simultaneously and discharge.Such battery generally includes Ni-Cd battery, Ni-MH battery, Li battery and lithium ion (Li-ion) secondary cell.The operating voltage of lithium rechargeable battery is usually as the Ni-Cd battery of portable electric appts power supply or three times of lithium-MH battery.Further, lithium rechargeable battery is used owing to it has high per unit weight energy density widely.
This lithium rechargeable battery uses the lithium base oxide as positive electrode active materials, and uses material with carbon element as negative active core-shell material.Usually, according to electrolytical type, cell types can be divided into liquid state electrolyte battery and polymer electrolyte battery, wherein uses the battery of liquid electrolyte to be called lithium ion battery, uses the battery of polymer dielectric to be called lithium polymer battery.Further, lithium secondary battery can be manufactured into different types, typically comprises cylindric, square shape and bag shape.
Battery with these shapes is connected to protective circuit, and this protective circuit is used for selecting battery is carried out charge or discharge, or is overcharged or overcurrent is cut off the electricity supply when flowing through battery when battery, thereby protects this battery.The battery and the portable electric appts serial or parallel connection that have protective circuit more than one.When in such as the portable electric appts of a large amount of electric energy of consumption of notebook computer, using battery, series connection of polylith cylindrical battery and parallel connection usually, thus export with electric energy the running time that increases battery.
Be installed in such as the polylith cylindrical battery in the frivolous portable electric appts of notebook computer and all have identical capacity and size.When the cylindrical battery with identical size is installed in the portable electric appts, when for example being installed in the notebook computer, possibly in this notebook computer, form the space.When bag shape battery is contained in this space, can increase the capacity of battery.
But the bag shape battery that is connected to cylindrical battery possibly have the capacity different with said cylindrical battery.If protective circuit is controlled the charge/discharge of battery with different capabilities, then some charge mode battery different with the charge mode of protective circuit possibly cause non-homogeneous charging or non-homogeneous discharge, comprises over-discharge can.
Except non-homogeneous charge/discharge, the problem of existence also has short circuit and the abnormal work that the battery with different capabilities is carried out automatic charge/discharge and this type of battery of control.
Summary of the invention
One side of the present invention is the battery with different capabilities is stablized and balanced charge/discharge.
In addition, another aspect of the present invention is only to use the electric energy of battery to carry out charge/discharge.
In addition, another aspect of the present invention is when being contained in dissimilar rechargeable battery mixing in the portable electric appts, to increase available space.
In addition, one side more of the present invention is when carrying out battery protection, to carry out effectively charge/discharge.
According to an aspect of the present invention, a kind of hybrid battery is provided, this hybrid battery comprises: have the polylith rechargeable battery of different capacity, every all has high current path; Switch element is used in the high current path that of high current path through being electrically connected to said rechargeable battery selects said rechargeable battery; The hybrid battery protective circuit; Be electrically connected to said polylith rechargeable battery; And an electric energy of being supplied by in the said polylith rechargeable battery drives; Said hybrid battery protective circuit is electrically connected to said switch element, and comes successively said polylith rechargeable battery to be carried out charge/discharge through sending conducting/cut-off signal to said switch element, and wherein said hybrid battery protective circuit is configured to carry out: first step; Survey in the polylith rechargeable battery that be recharged/discharge said have different capabilities one charge/discharge state; When the battery of being surveyed during not by complete charge/discharge, the charging/discharging method with by the battery capacity decision of institute's monitoring cell begins the battery of being surveyed is carried out charge/discharge; And during by charge/discharge fully, stop said charge/discharge at the battery surveyed; Second step after stopping said charge/discharge, is repeated said first step to another piece in the said polylith rechargeable battery by complete charge/discharge at the battery of being surveyed; And third step, when all said polylith batteries during, stop said polylith cell charging all by complete charge/discharge.
Can form said polylith rechargeable battery with bag shape battery through merging jar shape battery.
Said hybrid circuit may further include: charge/discharge path selector; It is selected charging path and discharge path; Said charging path can flow the electric current that flows into selected battery with direction forward; Said discharge path can flow the electric current that flows into selected battery with direction backward, and said charge/discharge path selector is disposed between said polylith rechargeable battery and the said switch element.
Said hybrid battery may further include: the battery identification message part, and it is electrically connected to said charge/discharge terminal, and comprises: first capacitor, it is electrically connected to the plus end and the negative terminal of said charge/discharge terminal; Second capacitor, it is electrically connected in said plus end and the said negative terminal; And resistor, it is connected to said second capacitor with said first capacitor.
According to a further aspect in the invention, a kind of hybrid battery is provided, this hybrid battery comprises: the polylith rechargeable battery with different capacity; A plurality of switch elements that are used for the battery selection, each switch element is electrically connected to the high current path of one of said polylith rechargeable battery respectively, and the number of said switch element is corresponding to the number of said polylith rechargeable battery; Be used for the switch element of charge/discharge, comprise: the charge switch element, it is electrically connected to the junction point of all high current paths of all said polylith rechargeable batteries; And discharging switch element, be electrically connected to said charge switch element respectively; With the hybrid battery protective circuit; Comprise: voltage detector; It is electrically connected to each rechargeable battery the corresponding a plurality of cell voltages and the reference voltage of said polylith rechargeable battery is compared, and output and the corresponding digital signal of magnitude of voltage surveyed by said comparison; And controller; It receives from the digital signal of said voltage detector output; And through coming from said polylith battery, to select one to a said output conducting/cut-off signal that is used for the switch element of battery selection; And to the said charge/discharge switch element output conducting/cut-off signal of the high current path that is electrically connected to selected battery; Thereby when institute's monitoring cell does not have complete charge/discharge, institute's monitoring cell is carried out charge/discharge, and at institute's monitoring cell during by charge/discharge fully with charging/discharging method by the decision of the battery capacity of institute's monitoring cell; Stop said charge/discharge, said controller is electrically connected to the said switch element of said charge/discharge switch element.
Said hybrid battery protective circuit may further include: through current probe, be used to survey the electric current that flows on the said polylith rechargeable battery, and break off the said switch element that is used for charge/discharge.
Saidly can survey the charger that is connected when being discharged fully at said polylith rechargeable battery through current probe; Conducting is connected to the said switch element that is used to charge of said polylith rechargeable battery, and said of being used for switch element that battery selects of conducting.
Said hybrid battery protective circuit may further include: the switching delay time controller; The switching delay time between its said switch element that is used to charge of control and the said switch element that is used to discharge; Said switching delay time controller further has connected passive component, thereby controls the switching delay time between said switch element that is used to charge and the said switch element that is used to discharge.
Said hybrid battery protective circuit can be made up of the semiconductor device integrated circuit in the single-chip package.
The said switch element that is used for the battery selection can be made up of the P-channel field-effect transistor (PEFT) transistor, and the said switch element that is used for charge/discharge can be made up of the N slot field-effect transistor.
The said switch element that is used for charge/discharge can have the parasitic diode that is used to prevent reverse current.
Said polylith rechargeable battery can constitute through jar shape battery is made up with bag shape battery.
According to a further aspect in the invention, a kind of hybrid battery is provided, this hybrid battery comprises: the polylith rechargeable battery with different capacity; Be used for the switch element of charge/discharge, comprise: the switch element that is used to charge, it is electrically connected to said polylith rechargeable battery respectively; With the switch element that is used to discharge, it is electrically connected to the said switch element that is used to charge respectively; With the hybrid battery protective circuit, comprising: voltage detector, it is electrically connected to said polylith rechargeable battery, so that the voltage and the reference voltage of said rechargeable battery compared, and according to the state of said rechargeable battery output digital signal; And controller; It is electrically connected to the said switch element that is used for charge/discharge; Said controller receives from the digital signal of said voltage detector output; And optionally to the said switch element output conducting/cut-off signal that is used for charge/discharge, thereby when institute's monitoring cell did not have complete charge/discharge, the charging/discharging method that determines with the battery capacity by institute's monitoring cell carried out charge/discharge to institute's monitoring cell; And during by charge/discharge fully, stop said charge/discharge at the institute monitoring cell.
Said hybrid battery protective circuit may further include: through current probe, be used for surveying the electric current that said rechargeable battery flows, and break off the said switch element that is used for charge/discharge.
When said rechargeable battery is discharged fully, saidly can survey the charger that is connected, and conducting is connected to one of said switch element that is used to charge of said rechargeable battery through current probe.
Be used to prevent that the parasitic diode of reverse current from can form between said controller and said voltage detector, saidly be used to prevent that the parasitic diode of reverse current is connected to said controller and said voltage detector, thereby form common ground potential.
Said hybrid battery protective circuit may further include: the switching delay time controller; Be used for controlling the switching delay time between said switch element that is used to charge and the said switch element that is used to discharge; Said switching delay time controller further is connected to passive component, so that control the switching delay time between said switch element that is used to charge and the said switch element that is used to discharge.
Said hybrid battery protective circuit can be made up of the semiconductor device integrated circuit in the single-chip package.
Said switch element that is used to charge and the said switch element that is used to discharge can have the N slot field-effect transistor to constitute.
The said switch element that is used for charge/discharge all can have the parasitic diode that is used to prevent reverse current.
Said polylith rechargeable battery can constitute through jar shape battery is made up with bag shape battery.
According to another aspect of the invention, a kind of hybrid battery is provided, said hybrid battery comprises: the polylith rechargeable battery with different capacity; Be used for the switch element of charge/discharge, comprise: the switch element that is used to discharge, it is electrically connected to many high current paths of battery, and the number of said many high current paths of battery is corresponding to the number of said polylith rechargeable battery; With the switch element that is used to charge, it is electrically connected to the high current path contact of the said switch element that is used to discharge; With the hybrid battery protective circuit; Comprise: voltage detector; It is electrically connected to said polylith rechargeable battery, so that the voltage and the reference voltage of said rechargeable battery compared, and output and the corresponding digital signal of magnitude of voltage surveyed by said comparison; And controller; It is electrically connected to the said switch element that is used for charge/discharge; To receive from the digital signal of said voltage detector output; And optionally to said switch element that is used to discharge and the said switch element output conducting/cut-off signal that is used to charge, thereby when institute's monitoring cell did not have complete charge/discharge, the charging/discharging method that determines with the battery capacity by institute's monitoring cell carried out charge/discharge to institute's monitoring cell; And during by charge/discharge fully, stop said charge/discharge at the institute monitoring cell.
Said hybrid battery protective circuit may further include: through current probe, be used for surveying the electric current that said rechargeable battery flows, and break off the said switch element that is used for charge/discharge.
When said rechargeable battery is discharged fully, saidly can survey the charger that is connected, and conducting is connected to of the said switch element that is used for charging of said rechargeable battery through current probe.
Be used to prevent that the parasitic diode of reverse current from can form between said controller and said voltage detector, and saidly be used to prevent that the parasitic diode of reverse current is connected to said controller and said voltage detector, so that form common ground potential.
Said hybrid battery protective circuit may further include the switching delay time controller; Be used for controlling the switching delay time between said switch element that is used to charge and the said switch element that is used to discharge; Said switching delay time controller further is connected to passive component, so that control the switching delay time between said switch element that is used to charge and the said switch element that is used to discharge.
Said hybrid battery protective circuit can be made up of the semiconductor integrated circuit in the single-chip package.
Said switch element that is used to charge and the said switch element that is used to discharge can be made up of N slot field-effect transistor or P-channel field-effect transistor (PEFT) transistor.
Said switch element that is used to charge or the said switch element that is used to discharge can have the parasitic diode that is used to prevent reverse current
Said polylith rechargeable battery can form through jar shape battery is made up with bag shape battery.
In accordance with a further aspect of the present invention; A kind of method to the hybrid battery charging is provided, and this method comprises: first step, one charged state in the polylith rechargeable battery with different capabilities that detection is being recharged; When the battery of being surveyed is not charged fully; The charging method that determines with the battery capacity by institute's monitoring cell begins the battery of being surveyed is charged, and when institute's monitoring cell is charged fully, stops said charging; Second step is charged fully and after stopping said charging, another piece in the said polylith rechargeable battery is repeated said first step at institute's monitoring cell; And third step, when all said polylith batteries are all charged fully, stop said polylith battery charge.
Carrying out said first during the third step, when said polylith battery all is in complete charged state, carry out simultaneously one survey the state that overcharges that said polylith battery is in step.
Said method of the present invention may further include following steps: when said first between the third step flow periods, exist when being higher than pass through electric current and flow of set breakdown current, under the situation of charge/discharge switch disconnection, stop charge/discharge.
According to a further aspect in the invention, a kind of method that hybrid battery is discharged is provided, has comprised: first step; One discharge condition in the polylith rechargeable battery that detection is being discharged with different capabilities; When the battery of being surveyed was not discharged fully, the charging method so that the battery capacity by institute's monitoring cell determines began the battery of being surveyed is discharged; And when the battery of being surveyed is discharged fully, stop said discharge; Second step is discharged fully and after stopping said discharge, another piece in the said polylith rechargeable battery is repeated said first step at the battery of being surveyed; Third step when all said polylith batteries are all discharged fully, stops said polylith battery discharge.
Said method of the present invention may further include following steps: when said first during the third step, exist be higher than set breakdown current pass through electric current when mobile, stop charge/discharge through breaking off said charge/discharge switch.
Description of drawings
Through with reference to below in conjunction with the detailed description of accompanying drawing, the present invention is easier to understand, therefore also will be obvious to the more complete understanding of the present invention and the benefit followed thereof.In the accompanying drawings, identical Reference numeral is indicated same or analogous parts, wherein:
Fig. 1 a is the circuit diagram according to the hybrid battery of exemplary embodiment of the present.
Fig. 1 b circuit diagram of charge/discharge passage elements that has been the interpolation corresponding with Fig. 1 a.
Fig. 2 a is the circuit diagram according to the hybrid battery of another exemplary embodiment of the present invention.
Fig. 2 b is the exemplary voltage detector that uses among Fig. 2 a, Fig. 3 and Fig. 4 and the circuit diagram of peripheral components thereof.
Fig. 3 is the circuit diagram that illustrates according to the hybrid battery of the another exemplary embodiment of the present invention.
Fig. 4 is the circuit diagram according to the hybrid battery of yet another embodiment of the invention.
Fig. 5 is the flow chart according to the charging/discharging method of the hybrid battery of an illustrative embodiment of the invention.
Embodiment
Hereinafter, will describe hybrid battery in detail with reference to accompanying drawing according to exemplary embodiment of the present.In entire chapter of the present invention is described, run through different drawings, identical Reference numeral is used for components identical.In addition, for the sake of brevity, run through different drawings, components identical is not carried out repetition of explanation.
Fig. 1 a is the circuit diagram according to the hybrid battery of exemplary embodiment of the present.
With reference to Fig. 1 a, comprise: polylith rechargeable battery 110, switch element 120 and hybrid battery protective circuit 130 according to hybrid battery 100 of the present invention.
For ease Fig. 1 a is made an explanation; The polylith rechargeable battery is illustrated as first battery 111 and second battery 112; Switch element 120 is electrically connected to the high current path of first and second batteries 111 and 112, and hybrid battery protective circuit 130 is electrically connected to first battery 111, second battery 112 and switch element 120.
The rechargeable battery that first battery 111 and second battery 112 differ from one another for capacity, and be electrically connected to each other.Can use the battery pack of forming by the polylith battery to form first battery 111 and second battery 112.
First battery 111 and second battery 112 can be jar shape battery or bag shape battery.In addition, the capacity of first battery 111 and second battery 112 can differ from one another.Like this, when mix using battery, when they being packed into the portable electric appts (not shown), can increase space availability ratio with the type that differs from one another and capacity.
The switch element 120 that is electrically connected to the high current path of first battery 111 and second battery 112 is selected one in first battery 111 and second battery 112, and makes selected that battery can be recharged/discharge.This switch element 120 can comprise the electric equipment as switch, and is connected to the corresponding high current path of first battery 111 and second battery 112, thus conducting or cut off high current path.This switch element 120 is switched on/break off by the signal controlling from 130 inputs of hybrid battery protective circuit then.
Hybrid battery protective circuit 130 from first battery 111 and second battery 112, selects one to switch element 120 transmission conducting/cut-off signals, then selected that battery is carried out charge or discharge.This hybrid battery protective circuit 130 comprises integrated a plurality of logical blocks, passive component and active element, and the electric energy that utilizes one of first battery 111 or second battery 112 to provide drives.For hybrid battery protective circuit 130 is driven by the electric energy that one of second battery 111 or second battery 112 provide, hybrid battery protective circuit 130 should be electrically connected to the positive pole/negative pole of first battery 111 and second battery 112, shown in Fig. 1 a.
Have above-mentioned configuration according in the hybrid battery of the present invention; Because hybrid battery protective circuit 130 is charged to first battery 111 and second battery 112 with the charging/discharging method after improveing to capacity and variform first battery 111 and second battery 112 and is discharged, so hybrid battery protective circuit 130 can solve by the different non-homogeneous charge/discharge problems that cause with the capacity of second battery 112 of first battery 111.Simultaneously, through mixing land productivity with having rechargeable battery dissimilar and configuration, for example jar shape battery and bag shape battery when packing these batteries into portable electric appts, can increase available space.In addition, because hybrid battery protective circuit 130 is driven by the electric energy that first battery 111 and second battery 112 provide, therefore can control the charge/discharge of first battery 111 and second battery 112 automatically.
Fig. 1 b is corresponding to Fig. 1 a and has added the circuit diagram of charge/discharge path.
With reference to Fig. 1 b, charge/discharge path selector 140 further is arranged between first battery 111 and second battery 112.Charge/discharge path selector 140 is selected to allow electric current to flow to the charging path 140b of selected battery with direction of advance and is allowed electric current with the direction mobile discharge path 140a opposite with charging path 140b.When first battery 111 and second battery 112 are charged; Charge/discharge path selector 140 prevents faulty operation through cutting off the electric current that flows among the discharge path 140a; When in an identical manner first battery 111 and second battery 112 being discharged, charge/discharge path selector 140 prevents faulty operation through being breaking at the electric current that flows among the charging path 140b.This charge/discharge path selector 140 can comprise diode and switch element, or comprises the integrated circuit of logic element and electric component.
In addition; First battery 111 and second battery 112 are electrically connected to charge/discharge terminal (+P;-P); First capacitor 151 be arranged in positive charge/discharge terminal (+P) and negative charge/discharge terminal (P), with cut off the direct voltage between the said discharge terminal, also comprise be electrically connected to positive charge/discharge terminal (+P) with negative charge/discharge terminal (second capacitor 152 one of P).The resistor 153 that is electrically connected first capacitor 151 and second capacitor 152 is connected to auxiliary terminal T/H.Correspondingly, when auxiliary terminal T/H and charge/discharge terminal (+P ,-when P) being connected to the battery terminal of charger or portable electric appts, it provides the resistance value of resistor 153 to charger or portable electric appts, to notify its type and characteristic to them.
Fig. 2 a is the circuit diagram according to the hybrid battery of another exemplary embodiment of the present invention.
With reference to Fig. 2 a, hybrid battery 200 of the present invention comprises: polylith rechargeable battery 111 and 112; Be used to select the battery selector switch element 210 of battery; Charge/discharge switch element 230 is used to select the charge/discharge path by the battery of battery selector switch element 210 selections; With hybrid battery protective circuit 240, be used to control battery selector switch element 210 and charge/discharge switch element 230.
Describe for ease, in Fig. 2 a, the polylith rechargeable battery is shown work first battery 111 and second battery 112.Battery selector switch element 210 is divided into first switch element 211 and second switch element 212, and wherein first switch element 211 is electrically connected to the high current path of first battery 111, and second switch element 212 is electrically connected to the high current path of second battery 112.In addition; Charge/discharge switch element 230 is connected to the intersection point of high current path of high current path and second battery 112 of first battery 111; And hybrid battery protective circuit 240 is electrically connected to first battery 111, second battery 112, battery selector switch element 210 and charge/discharge switch element 230, shown in Fig. 2 a.
Battery selector switch element 210 comprises first switch element 211 and the second switch element 212 that is connected to second battery 112 that is connected to first battery 111.Like this, through to the additional switch element of each battery, come respectively first battery 111 and second battery to be connected to high current path discretely.
Charge/discharge switch element 230 comprises charge switch element 231 and discharging switch element 232; Charge switch element 231 is electrically connected to the intersection point of high current path of high current path and second battery 112 of first battery 111, and discharging switch element 232 is electrically connected to charge switch element 231.This charge switch element 231 is arranged on the high current path circuit so that reduce the length of circuit layout (circuit pattern) with discharging switch element 232; Charge switch element 231 when charging by 240 conductings of hybrid battery protective circuit, thereby be connected to the charging path of from the high current path of the high current path of first battery 111 and second battery 112, selecting.Because the charging path representes that the charger (not shown) that is connected with first battery 111 or second battery 112 should be to the direction of first battery 111 or 112 chargings of second battery, electric current is counterclockwise to flow.On the contrary, discharging switch element 232 causes electric current between the high current path of the high current path of first battery 111 and second battery 112, to flow in a clockwise direction, and is opposite with the charging path direction.
Hybrid battery protective circuit 240 further comprises voltage detector 241 and 242 and controller 240, comprises a plurality of logic elements, passive component and active element separately.With reference to Fig. 2 a, voltage detector is divided into first voltage detector 241 and second voltage detector 242 that is electrically connected to second battery 112 that is electrically connected to first battery 111.
First voltage detector 241 compares voltage and a plurality of reference voltage of first battery 111.This first voltage detector 241 can be classified to the state of first battery 111 according to the voltage that in first battery, records.As follows with the interpretive classification method, once more with reference to Fig. 2 b.First voltage detector 241 is supplied with reference voltages to a plurality of operational amplifiers, and the voltage that will in first battery 111, record compares with the reference voltage of supplying with to operational amplifier, so that can classify to the state of first battery 111.The state of being classified can be complete charged state or complete discharge condition.In addition, this classification may further include and overcharges and over-discharge can.Like this; The digital signal of exporting according to the state of in first detector 241, being classified is supplied to controller 233; And correspondingly; Received the state information of controller 233 identifications first battery 111 of this signal, so that controller 233 conductings/disconnection battery selector switch element 210 and charge/discharge switch element 230.
Second voltage detector 242 compares voltage and a plurality of reference voltage of second battery 112.Through voltage that records and reference voltage are compared, the state of second battery 112 can be divided into complete charged state and complete discharge condition.In addition, this classification may further include the state of overcharging and over-discharge state.Identical, second voltage detector 242 can have and the identical configuration of above-mentioned first voltage detector 241.
Controller 233 is led the on/off Continuity signal to 210 outputs of battery selector switch element, and from first battery 111 and second battery 112, selects one.In addition, controller 233 is led the on/off Continuity signal to 230 outputs of charge/discharge switch element, and is to select the charge/discharge path by first battery 111 or second battery 112 that battery selector switch element 210 is selected.First voltage detector 241 and second voltage detector 242 come detecting voltage according to the charge/discharge state of first battery 111 or second battery 112, and export digital signals according to charge/discharge to controller 233.The controller 233 that receives this digital signal forms the charging path through the charge switch element 231 of conducting charge/discharge switch element 230, or forms discharge path through conducting discharging switch element 232.After selecting charging path or discharge path, in optionally conducting first switch element 211 or second switch element 212, one of first battery 111 and second battery 112 are recharged or quilt is discharged.Controller 233 detects charge/discharge terminals (+P ,-P) terminal voltage, and judge it is charged state or discharge condition.
Hybrid battery protective circuit 240 may further include: through electric current (over-current) detector 234, it detects the electric current that between first battery 111 and second battery 112, flows, and breaks off charge/discharge switch element 230.This circuit, charger (not shown) or first battery 111 and second battery 112 of hybrid battery protective circuit 240, portable electric appts (not shown) of preventing through current probe 234 is damaged when electric current flows into fast and flows out circuit.
When first battery 111 and the discharge fully of second battery, 112 quilts; And when cut first controller 233 of power supply loses its controlled function; Detect the charger (not shown) through current probe 234 and just be connected to/bearing charge/discharge terminal (P+; P-), so it can conducting charge switch element 231, and conducting first switch element 211 or second switch element 212 simultaneously.Correspondingly, can select first switch element 211 or second switch element 212 to charge.
Hybrid battery protective circuit 240 may further include: switching delay time controller 235, the switching time between its control charge switch element 231 and the discharging switch element 232 is poor.In comprising the hybrid battery protective circuit 240 of this switching delay time controller 235; Be connected to a terminal of switching delay time controller 235 such as the passive component of capacitor and resistor, charge switch element 231 and discharging switch element 232 switched the required time so that can control.
Hybrid battery protective circuit 240 can be the semiconductor device integrated circuit.Hybrid battery protective circuit 240 can be made up of the single chip with semiconductor die package type, for example, has the semiconductor die package of 8 to 10 pins.Be electrically connected to the power supply of the power supply (not shown) of first battery 111 and second battery 112, the stable electric energy through rectification be provided to hybrid battery protective circuit 240 as hybrid battery protective circuit 240.When making hybrid battery protective circuit 240 with the semiconductor die package type, integrated possibly being specialized so that presentation function, and hybrid battery protective circuit 240 possibly be contained on the insulated substrate (not shown) etc.
Battery selector switch element 211 and 212 comprises the P-channel field-effect transistor (PEFT) transistor.In addition; Charge/discharge switch element 231 switch elements 232 are the N slot field-effect transistor, and can come the charge or discharge path between the high current path of conducting first battery 111 and second battery 112 through the Continuity signal of hybrid battery protective circuit 240.
Reverse-current protection parasitic diode 231a and 231b can be included in charge switch element 231 and the discharging switch element 232.When 231 conductings of charge switch element; And the electric current that is connected to first battery 111 and second battery 112 is during therein with the charging path that counterclockwise flows, and the reverse-current protection parasitic diode 231a that is connected to charge switch element 231 cuts off clockwise discharge path.In a similar fashion, reverse-current protection parasitic diode 232b forms in discharging switch element 232, and when first battery 111 and second battery 112 were discharged, the charging path was cut off.
Fig. 3 is the circuit diagram according to the hybrid battery of another exemplary embodiment of the present invention.
With reference to Fig. 3, hybrid battery 300 of the present invention comprises polylith rechargeable battery 111 and 112, a plurality of charge/ discharge switch element 310 and 320 and hybrid battery protective circuit 330.
In the exemplary drawings of Fig. 3; Describe for ease; The polylith rechargeable battery is shown work first battery 111 and second battery 112; And the charge/discharge switch element is divided into the first charge/discharge switch element 310 and the second charge/discharge switch element 320, and it is electrically connected to first battery 111 and second battery 112 respectively.In addition, hybrid battery protective circuit 330 is electrically connected to first battery 111, second battery 112, the first charge/discharge switch element 310 and the second charge/discharge switch element 320.
The first charge/discharge switch element 310 comprises: first discharging switch element 312, and it is electrically connected to an end of first battery 111; With the first charge switch element 311, it is electrically connected to first discharging switch element 312.As the response of the Continuity signal that slave controller 333 is exported, the path that the first charge switch element 311 connects between first batteries 111 and the negative charge/discharge terminal (P-) comes first battery 111 is charged.As the response of the Continuity signal that slave controller 333 is exported, the path that first discharging switch element 312 connects between first batteries 111 and the negative charge/discharge terminal (P-) comes first battery 111 is discharged.
In addition, be similar to the first charge/discharge switch element, 310, the second charge/discharge switch elements 320 and comprise: second discharging switch element 322, it is electrically connected to an end of second battery 112; With the second charge switch element 321, it is electrically connected to second discharging switch element 322.As to the response from the Continuity signal of second controller 333 output, the path that the second charge switch element 321 connects between second batteries 112 and the negative charge/discharge terminal (P-) comes second battery 112 is charged.As to the response from the Continuity signal of second controller 333 output, the path that second discharging switch element 322 connects between second batteries 112 and the negative charge/discharge terminal (P-) comes second battery 112 is discharged.
Hybrid battery protective circuit 330 comprises voltage controller 331 and 332 and controller 333.This voltage protection circuit 330 can be through carrying out integrated formation to a plurality of logic elements, active element and passive component.In this case, describe for ease, second voltage detector 332 of first voltage detector 331 that voltage controller is divided into the voltage that is used to survey first battery 111 and the voltage that is used to survey second battery 112, as shown in Figure 3.
First voltage detector 331 compares voltage and a plurality of reference voltage of first battery 111.This first voltage detector 331 comes the state of first battery 111 is classified according to the voltage of the first measured battery 111.With reference to Fig. 2 b, sorting technique is described as follows once more.First voltage detector 311 is supplied with reference voltages to a plurality of operational amplifiers, controls the voltage amplitude of the first measured battery 111 through resistor, and the state of first battery 111 is classified.First battery 111 can be classified as the complete charged state of about 4.1V and the complete discharge condition of about 3.0V.Because the voltage to these states is to be confirmed by the reference voltage of supplying with a plurality of operational amplifiers, therefore can select a plurality of voltages.Identical ground, the Continuity signal of exporting according to the state of in first voltage detector, classifying is supplied to controller 333, and correspondingly, is supplied to the state information of controller 333 identifications first battery 111 of Continuity signal.
Second voltage detector 332 compares voltage and a plurality of reference voltage of second battery 112.In addition, through voltage and the reference voltage that records compared, the state of second battery 112 can be classified as complete discharge condition and complete charged state.This second voltage detector 332 can be by constituting with the 331 identical configurations of above-mentioned first voltage detector.
Controller 333 can come according to the state of first battery of being surveyed by first detector 331 and second detector 332 111 and second battery 112 first battery 111 and second battery 112 are carried out charge/discharge.At first, when the load (not shown) such as portable electric appts is connected to positive charge/discharge terminal (P+) and negative charge/discharge terminal (P-) and discharge takes place, controller 333 conductings first discharging switch element 312, and first battery 111 discharged.Next, when first battery 111 was discharged into the puncture voltage that is provided with in first voltage detector 331, first discharging switch element 312 broke off; The discharge of first battery 111 stops; And simultaneously, 332 conductings of second discharging switch element, and second battery 112 is discharged.Subsequently, proceed to the puncture voltage that is provided with in the second discharge detector 332 or fully during discharge voltage, second discharging switch element 332 breaks off, and the discharge of second battery 112 stops when discharge.When the charger (not shown) is connected to positive charge/discharge terminal (P+) and negative charge/discharge terminal (P-) when charging, 311 conductings of the first charge switch element, and first battery 111 is recharged.Next, when first battery 111 was charged to the puncture voltage that is provided with in first voltage detector 331, it broke off the first charge switch element 311; And the charging of first battery 111 stops; And simultaneously, 321 conductings of the second charge switch element, and second battery 112 is recharged.Subsequently, proceed in second voltage detector 332 puncture voltage that is provided with or fully during charging voltage, the second charge switch element 322 breaks off, and the charging of second battery 112 stops when charging.Controller 333 can detect charge/discharge terminal (P+, terminal voltage P-), and judge that battery status is charging or discharge.
Hybrid battery protective circuit 330 may further include: through current probe 348; It detects electric current mobile in first battery 111 and second battery 112, and the conducting first charge switch element 311, first discharging switch element 312, the second charge switch element 331 and second discharging switch element 321.Can supply with that operational amplifier constitute through the reference voltage that will supply with first voltage detector 331 and second voltage detector 332 should be through current probe 348, said through current probe 348 and can probe to the instantaneous unexpected voltage drop of passing through the electric current inflow.This circuit, charger (not shown), first battery 111 or second battery 112 of hybrid battery protective circuit 330, portable electric appts (not shown) of preventing through current probe 348 is damaged when electric current flows into fast and flows out circuit.
When first battery 111 and the discharge fully of second battery, 112 quilts; And when cut first controller 333 of power supply loses its controlled function; Detect the charger (not shown) through current probe 348 and just be connected to/bearing charge/discharge terminal (P+; P-), and from the first charge switch element 311 and the second charge switch element 321, select one, and with its conducting.Correspondingly, one of first battery 111 or second battery 112 are selected to charge.Can drive hybrid battery protective circuit 330 by the power supply of supplying with from charger.
Controller 330 prevents that with reverse current diode 345 is connected to first earth potential of first battery 111 and second earth potential of second battery 112 jointly, and forms common ground potential 334.Like this, though in first battery 111 and second battery 112 one is discharged by common ground potential 344 fully, can utilize in first battery 111 and second battery 112 another to provide electric energy with driving governor 330.Reverse current prevents that diode 345 is breaking at the electric current that flows in first earth potential 341 and second earth potential 346.
Hybrid battery protective circuit 330 may further include: switching delay time controller 349, it controls the switching difference between the first charge switch element 311 and the second charge switch element 321 and the first/the second discharging switch element 312 and second discharging switch element 322.In comprising the hybrid battery protective circuit 330 of this switching delay time controller 349; Be connected to a terminal of switching delay time controller 349 such as the passive component of capacitor and resistor, switch the first charge switch element 311 and the second charge switch element 321 and first discharging switch element 312 and required time of second discharging switch element 322 so that can control.
Hybrid battery protective circuit 330 can comprise the semiconductor device integrated circuit.Hybrid battery protective circuit 330 with above-mentioned functions forms in semiconductor die package, comprises 8 to 10 pins.When circuit forms in semiconductor die package, be easy in large-scale production is arranged, circuit is contained on the dielectric substrate, thereby reduce manufacturing cost.
In this case; The first charge switch element 311 and the second charge switch element 321 and first discharging switch element 312 and second discharging switch element 322 can comprise field-effect transistor etc.; Especially; The N slot field-effect transistor, so they can serve as switch and not need extra booster circuit.
Can be in the first charge switch element 311, the second charge switch element 321, first discharging switch element 312 and second discharging switch element 322 each self-forming parasitic diode 311a, 312a, 321a and 322a, thereby when charge or discharge, prevent reverse current.Owing to described this parasitic diode 311a, 312a, 321a and 322a in the foregoing description, therefore omitted its detailed description.
Fig. 4 is the circuit diagram that illustrates according to the hybrid battery of another exemplary embodiment of the present invention.
With reference to Fig. 4, hybrid battery 400 of the present invention comprises: polylith rechargeable battery 111 and 112, a plurality of charge/discharge switch element 410 and hybrid battery protective circuit 420.
In the exemplary drawings of Fig. 4, to describe for ease, the polylith battery is shown to make first battery 111 and second battery 112 limitedly.In addition; Charge/discharge switch element 410 is divided into first discharging switch element 411, second discharging switch element 412 and charge switch element 413; First discharging switch element 411 is electrically connected to the high current path of first battery 111; Second discharging switch element 412 is electrically connected to the high current path of second battery, and charge switch element 413 is electrically connected to the intersection point of high current path of high current path and second discharging switch element 413 of first discharging switch element 412.In addition, hybrid battery protective circuit 420 is electrically connected to first battery 111, second battery 112 and charge/discharge switch element 410.
In charge/discharge switch element 410; Discharging switch element 411 and 412 is connected to first battery 111 and second battery 112; Therefore can select the charging path separately of first battery 111 and second battery 112, and battery to be selected can optionally be controlled by a charge switch element 413.
Hybrid battery protective circuit 410 can comprise voltage detector 421 and 422 and controller 423.Voltage detector is divided into: first voltage detector 421 is used to survey the voltage of first battery 111; With second detector 422, be used to survey the voltage of second battery 112.
First voltage detector 421 compares voltage and a plurality of reference voltage of first battery 111.This first voltage detector 421 is classified to the state of first battery 111 according to the voltage of the first measured battery 111.Because first voltage detector 421 is identical at the voltage detector shown in Fig. 2 b with above-mentioned other embodiment, therefore omit detailed description to first voltage detector 421 and second voltage detector 422.
Controller 423 comes first battery 111 and second battery 112 are carried out charge/discharge according to first battery of being surveyed by first detector 421 and second detector 422 111 and the state of second battery 112.At first; When the load (not shown) such as portable electric appts is connected between positive charge/discharge terminal (P+) and the negative charge/discharge terminal (P-) when discharging; Controller 423 conductings first discharging switch element 411, and first battery 111 discharged.Next; When first battery 111 is discharged in first voltage detector 421 puncture voltage that is provided with or fully during discharge voltage; First discharging switch element breaks off; And the discharge of first battery 111 stops, and second discharging switch element, 412 conductings simultaneously, and second battery 112 is discharged.Subsequently, proceed in second voltage detector 422 puncture voltage that is provided with or fully during discharge voltage, the second discharge detector 412 breaks off, and the discharge of second battery 112 stops when discharge.Further, when charger etc. is connected between positive charge/discharge terminal (P+) and the negative charge/discharge terminal (P-) and charges, the first charge switch element 311 and 413 conductings of charge switch element, and first battery 111 is recharged.Next; When first battery 111 was charged to the puncture voltage that is provided with in first voltage detector 421, it broke off first discharging switch element 411, and the charging of first voltage 111 stops; And second discharging switch element, 412 conductings simultaneously, and second battery 112 is recharged.Subsequently, proceed in second voltage detector 422 puncture voltage that is provided with or fully during charging voltage, second discharging switch element 412 breaks off, and the charging of second battery 112 stops when charging.In this case, when first battery 111 and second battery 112 were overcharged, charge switch element 413 broke off, and the charging of first battery 111 and second battery 112 stops.In addition, and controller 423 detection charge/discharge terminals (P+, terminal voltage P-), and judge that battery status is charging or discharge.
Hybrid battery protective circuit 420 may further include: through current probe 428, it detects the electric current that in first battery 111 and second battery 112, flows, and breaks off first discharging switch element 411 and second discharging switch element 412.Use through current probe as above-mentioned through current probe 428 owing to this, therefore omit its detailed description.
When first battery 111 and the discharge fully of second battery, 112 quilts; And when cut first controller 423 of power supply loses its controlled function; Detect the charger (not shown) through current probe 428 and just be connected to/bearing charge/discharge terminal (P+; P-), and conducting charge switch element 413, in conducting first discharging switch element 411 and second discharging switch element 412 and simultaneously.Correspondingly, from first battery 111 and second battery 112, select one, and it is charged.
Hybrid battery protective circuit 420 may further include: switching delay time controller 429; Switching difference between its control charge switch element 413 and first discharging switch element 411 and second discharging switch element 412; In comprising the hybrid battery protective circuit 420 of this switching delay time controller 429; Be connected to a terminal of switching delay time controller 429 such as the passive component of capacitor and resistor, switch charge switch element 413 and first discharging switch element 411 and required time of second discharging switch element 412 so that can control.
Hybrid battery protective circuit 420 can be the semiconductor device integrated circuit.Hybrid battery protective circuit 420 can be a single-chip, and for example the semiconductor die package type comprises about 8 to 10 pins.May further include the power supply that the power supply that is connected to first battery 111 and second battery 112 is used as hybrid battery protective circuit 420, the stable power supply through rectification is provided to hybrid battery protective circuit 420.When making hybrid battery protective circuit 420 with semiconductor die package, integrated can being specialized so that presentation function, and hybrid battery protective circuit 420 can be contained on the dielectric substrate (not shown) etc.
In addition; Charge switch element 413, first discharging switch element 411 and second discharging switch element 412 comprise N slot field-effect transistor or P-channel field-effect transistor (PEFT) transistor; And as to the conducting of hybrid battery protective circuit 420 or the response of cut-off signal, the charge or discharge path in the high current path of first battery 111 or second battery 112 can be switched on or break off.
In addition, in charge switch element 413, first discharging switch element 411 and second discharging switch element 412 can comprise that reverse current prevents parasitic diode 413a and 412a.Prevent among the parasitic diode 413a at the reverse current that is connected to charge switch element 413, when charging path when being connected to the high current path of first battery and second battery, charge switch element 413 conductings and cut off the discharge path between the high current path.
Fig. 5 is the flow chart according to the charging/discharging method of the hybrid battery of an illustrative embodiment of the invention.
In order to describe the charging method of hybrid battery of the present invention in detail, will provide description with reference to the charging method flow chart of Fig. 5.The charging method of the hybrid battery of Fig. 5 below will be described with reference to the circuit diagram of Fig. 2 a in addition.
Hybrid battery charging method of the present invention comprises first step S11, the second step S12 and third step S13.
At first, in first step S11, when charger (not shown) etc. is connected to the high current path of first battery 111 and second battery 112, from first battery 111 and second battery 112, selects one, and discern its charged state.For example, when selecting first battery 111, and when discerning its charged state, in first voltage detector 241, survey the charged state of first battery 111, said first voltage detector judges whether battery status is complete charged state.Charged state is meant the state of the voltage of first battery 111 a little less than the voltage that overcharges fully, for example, and about 4.1V.The reason that defines complete charged state is in order optionally first battery 111 and second battery 112 to be charged.Correspondingly, can arbitrarily define the current potential of complete charged state.In addition, first voltage detector 241 confirms that current potential is higher than the state that overcharges of first battery 111 of complete charged state current potential.Next; When the state of first battery of being discerned 111 is not complete charged state; Utilize the charging method of the battery capacity that satisfies first battery 111 to begin charging, and when the state of first battery 111 is complete charged state, forbid 111 chargings of first battery.When the state of first battery was not complete charged state, the charging method of first battery was following.First voltage detector 241 transmits the state information of first battery 111 to controller 233, and controller 233 confirms first batteries 111 by charging fully, and the output signal.Controller is to first switch element 211 and charge switch element 231 output Continuity signals, so that conducting first switch element 211 and charge switch element 231, therefore first battery 111 is recharged till charging fully.On the contrary, when first battery 111 is charged fully, forbid that the method to 111 chargings of first battery is to break off first switch element 211 through the cut-off signal from 233 outputs of first controller, and cut off the high current path of first battery 111.
At second step (S12), owing to first battery 111 first step (S11) charged fully forbid the charging of first battery 111 after, judge through the charged state of discerning second battery 112 whether the state of second battery 112 is complete charged states.Next; When second battery 112 is not in complete charged state; Utilize the charging method of the battery capacity that satisfies second battery 112 to begin second battery 112 is charged, and when second battery 112 is in complete charged state, forbid 112 chargings of second battery.
At third step (S13), when first battery 111 and second battery 112 all are in complete charged state, forbid first battery 111 and 112 chargings of second battery.Forbid the method for first battery 111 and 112 chargings of second battery is turn off charge switch elements 211 or breaks off first switch element 211 and second switch element 212; Therefore; (P+, high current path P-) break off first battery 111 and second battery 112 from just being connected to/bearing the charge/discharge terminal.
In addition; The mixed charged method further comprises the step (S10) that identification overcharges; Wherein first during the third step (S11, S12 and S13), when first battery 111 and second battery 112 are in when overcharging state, first battery 111 and second battery begin to be discharged.The step that this identification battery overcharges can be carried out in charge mode, and the charger (not shown) just is being connected to/is bearing the charge/discharge terminal (P+ P-), and charges under this pattern.After charge mode began, controller 233 was judged the charged state of first battery 111 and second battery 112, and came conducting/turn off charge switch element 231 and discharging switch element 232 through the conducting/cut-off signal from 233 outputs of first controller.More particularly, first voltage detector 241 of first controller 233 through being connected to first battery 111 and second battery 112 and the state of second voltage detector, 242 identification first batteries 111 and second battery 112.The state of overcharging of first battery 111 and second battery 112 is meant that first battery 111 and second battery 112 are overcharged, and first battery 111 and second battery 112 state that in the state of overcharging, has maximum potential respectively.The benchmark of this maximum potential can be provided with by the reference voltage of first voltage detector 241 and second voltage detector 242.According to the benchmark of the maximum potential that in first voltage detector 241 and second voltage detector 242, is provided with, first battery 111 and second battery 112 are identified as the state of overcharging that is in.Correspondingly; The charge switch element 231 that is connected to first battery 111 and second battery 112 is disconnected; Therefore; Forbid first battery 111 and the charging of second battery 112, and discharging switch element 232 is switched on first switch element 211 or second switch element 212, therefore first battery 111 or second battery, 112 quilts are discharged.This identification step that overcharges (S10) has and is higher than first to the priority of third step (S11, S12 and S13).
First during the third step (S11, S12 and S13); When being higher than the passing through electric current (over current) and flow of set breakdown current, the charge/discharge that is used for turn off charge switch element 231 and discharging switch element 232 is simultaneously forbidden step (S30).When electric current to first battery 111 and the charging of second battery 112 time fashionable from outer flow, perhaps when because the contact deficiency in the terminal of charger etc. when causing that spontaneous electric current flows, carries out charge/discharge forbids passing through the electric current inflow in the step (S30).When fashionable from outer flow through electric current, comprise above-mentioned situation, charge switch element 231 breaks off with discharging switch element 232 immediately, so that protect first battery 111, second battery 112 and hybrid battery protective circuit 240.This charge/discharge step (S30) has and is higher than first to the priority of third step.
Following with reference to the flow chart of Fig. 5 and the circuit diagram of Fig. 2 a, hybrid battery charging method of the present invention is described in detail.Hybrid battery charging method of the present invention comprises first step S21, the second step S22 and third step S23.
At first, at first step (S21), when load be electrically connected to first battery 111 and second battery 112 just/(P+, P-), and battery is discerned the battery status of first battery 111 or second battery 112 when being in discharge condition to negative charge/discharge terminal.For example, when selecting first battery, and when having discerned the discharge condition of first battery 111, first voltage detector 241 judges whether to take place discharge fully.Discharge is meant current potential that the voltage of first battery 111 the has voltage a little more than over-discharge state fully.The reason that defines this complete discharge condition is optionally first battery 111 and second battery 112 to be discharged.Next, when first battery 111 is not discharged fully, discharge till first battery 111 is discharged fully, and when first battery 111 is discharged fully, forbid 111 discharges of first battery.The method that first battery 111 is discharged fully is, first voltage detector 241 transmits the state information of first battery 111 to controller 233, and controller 233 is confirmed first batteries 111 by discharge fully, and the output signal.Controller 233 is to first switch element 211 and discharging switch element 232 output Continuity signals, so that first battery 111 begins discharge, till it is discharged fully.On the contrary; When first battery is discharged fully; Forbid the method for first battery, 111 discharges being; The complete discharge condition information of first battery of surveying in first voltage detector 241 111 is delivered to controller 233, and controller 233 is to first switch element, 211 output cut-off signals, so that break off first switch element 211.
At second step (S22), owing to first battery 111 first step (S21) discharged fully forbid the discharge of first battery 111 after, discern the discharge condition of second battery 112, and judge that whether second battery is by discharge fully.Next, when second battery was not discharged fully, second battery 112 was discharged, and when second battery 112 is discharged fully, forbade 112 discharges of second battery.
At third step (S23), when first battery 111 and second battery 112 are all discharged fully, forbid first battery 111 and 112 discharges of second battery.Forbid the method for first battery 111 and 112 discharges of second battery being; Discharging switch element 232 breaks off; Or first switch element 211 all break off with second switch element 212; Therefore first battery 111 and second battery 112 with just/(P+, the high current path between P-) is cut off to bear the charge/discharge terminal.
First during the third step (S21, S22 and S23), when being higher than set breakdown current, carrying out the charge/discharge that is used for turn off charge switch element 231 and discharging switch element 232 and forbid step (S30) through electric current.Owing in the hybrid battery charging method, described charge/discharge and forbidden step (S30), therefore omitted its detailed description.
Above-mentioned hybrid battery charging method and charging method can be applied to the hybrid battery of above-mentioned exemplary embodiment.
Though illustrate and described the present invention, it will be understood by those skilled in the art that and to make various changes and modification to the present invention, and do not break away from by defined spirit of the present invention of claim and protection range with reference to exemplary embodiment.
Hybrid battery and charging/discharging method thereof are through optionally carrying out the efficient that charge/discharge increases charge/discharge to the different battery of capacity.
Can only utilize the electric energy of battery and not utilize separate power supplies to drive the hybrid battery protective circuit, so battery can be by automatic charge/discharge.
When battery is installed to portable electric appts, can increase space availability ratio through dissimilar batteries is mixed.
During hybrid battery is carried out charge/discharge, when existence is flowed through electric current, can protect hybrid battery through cutting off this electric current.

Claims (21)

1. hybrid battery comprises:
Polylith rechargeable battery with different capacity, every all has high current path;
Switch element is used in the high current path that of high current path through being electrically connected to said rechargeable battery selects said rechargeable battery;
The hybrid battery protective circuit; Be electrically connected to said polylith rechargeable battery; And an electric energy of being supplied by in the said polylith rechargeable battery drives; Said hybrid battery protective circuit is electrically connected to said switch element, and comes successively said polylith rechargeable battery to be carried out charge/discharge through sending conducting/cut-off signal to said switch element, wherein
Said hybrid battery protective circuit is configured to carry out: first step; Survey in the polylith rechargeable battery that be recharged/discharge said have different capabilities one charge/discharge state; When the battery of being surveyed during not by complete charge/discharge, the charging/discharging method with by the battery capacity decision of institute's monitoring cell begins the battery of being surveyed is carried out charge/discharge; And during by charge/discharge fully, stop said charge/discharge at the battery surveyed; Second step after stopping said charge/discharge, is repeated said first step to another piece in the said polylith rechargeable battery by complete charge/discharge at the battery of being surveyed; And third step, when all said polylith batteries during, stop said polylith cell charging all by complete charge/discharge.
2. hybrid battery according to claim 1, wherein said polylith rechargeable battery comprise one jar of shape battery and one bag of shape battery.
3. hybrid battery according to claim 1; Further comprise: charge/discharge path selector; It is selected charging path and discharge path; Said charging path can flow the electric current that flows into selected battery with direction forward, and said discharge path can flow the electric current that flows into selected battery with direction backward, and said charge/discharge path selector is disposed between said polylith rechargeable battery and the said switch element.
4. hybrid battery comprises:
Polylith rechargeable battery with different capacity;
A plurality of switch elements that are used for the battery selection, each switch element is electrically connected to the high current path of one of said polylith rechargeable battery respectively, and the number of said switch element is corresponding to the number of said polylith rechargeable battery;
Be used for the switch element of charge/discharge, comprise: the charge switch element, it is electrically connected to the junction point of all high current paths of all said polylith rechargeable batteries; And discharging switch element, be electrically connected to said charge switch element respectively; With
The hybrid battery protective circuit; Comprise: voltage detector; It is electrically connected to each rechargeable battery the corresponding a plurality of cell voltages and the reference voltage of said polylith rechargeable battery is compared, and output and the corresponding digital signal of magnitude of voltage surveyed by said comparison; And controller; It receives from the digital signal of said voltage detector output; And through coming from said polylith battery, to select one to a said output conducting/cut-off signal that is used for the switch element of battery selection; And to the said charge/discharge switch element output conducting/cut-off signal of the high current path that is electrically connected to selected battery; Thereby when institute's monitoring cell does not have complete charge/discharge, institute's monitoring cell is carried out charge/discharge, and at institute's monitoring cell during by charge/discharge fully with charging/discharging method by the decision of the battery capacity of institute's monitoring cell; Stop said charge/discharge, said controller is electrically connected to the said switch element of said charge/discharge switch element.
5. hybrid battery according to claim 4, wherein said hybrid battery protective circuit further comprises: through current probe, it surveys the electric current that in said polylith rechargeable battery, flows, and breaks off the said switch element that is used for charge/discharge.
6. hybrid battery according to claim 4, wherein said hybrid battery protective circuit comprises the semiconductor device integrated circuit in the single-chip package.
7. hybrid battery according to claim 4; The wherein said switch element that is used for the battery selection is made up of the P-channel field-effect transistor (PEFT) transistor; And the said switch element that is used for charge/discharge is made up of the N slot field-effect transistor, and the said switch element that is used for charge/discharge has parasitic diode and prevents reverse current.
8. hybrid battery comprises:
Polylith rechargeable battery with different capacity;
Be used for the switch element of charge/discharge, comprise: the switch element that is used to charge, it is electrically connected to said polylith rechargeable battery respectively; With the switch element that is used to discharge, it is electrically connected to the said switch element that is used to charge respectively; With
The hybrid battery protective circuit comprises: voltage detector, and it is electrically connected to said polylith rechargeable battery, so that the voltage and the reference voltage of said rechargeable battery compared, and according to the state of said rechargeable battery output digital signal; And controller; It is electrically connected to the said switch element that is used for charge/discharge; Said controller receives from the digital signal of said voltage detector output; And optionally to the said switch element output conducting/cut-off signal that is used for charge/discharge, thereby when institute's monitoring cell did not have complete charge/discharge, the charging/discharging method that determines with the battery capacity by institute's monitoring cell carried out charge/discharge to institute's monitoring cell; And during by charge/discharge fully, stop said charge/discharge at the institute monitoring cell.
9. hybrid circuit according to claim 8, wherein said hybrid battery protective circuit further comprises: through current probe, it surveys the electric current that in said rechargeable battery, flows, and breaks off the said switch element that is used for charge/discharge.
10. hybrid battery according to claim 8; Further comprise: reverse current prevents diode; It is arranged between said controller and the said voltage detector, and said reverse current prevents that diode is connected to said controller and said voltage detector to form common ground potential.
11. hybrid battery according to claim 8, wherein said hybrid battery protective circuit comprises the semiconductor device integrated circuit in the single-chip package.
12. hybrid battery according to claim 8; Wherein said switch element that is used to charge and the said switch element that is used to discharge are made up of the N slot field-effect transistor, and the said switch element that is used for charge/discharge all has parasitic diode and prevents reverse current.
13. a hybrid battery comprises:
Polylith rechargeable battery with different capacity;
Be used for the switch element of charge/discharge, comprise: the switch element that is used to discharge, it is electrically connected to many high current paths of battery, and the number of said many high current paths of battery is corresponding to the number of said polylith rechargeable battery; With the switch element that is used to charge, it is electrically connected to the high current path contact of the said switch element that is used to discharge; With
The hybrid battery protective circuit; Comprise: voltage detector; It is electrically connected to said polylith rechargeable battery, so that the voltage and the reference voltage of said rechargeable battery compared, and output and the corresponding digital signal of magnitude of voltage surveyed by said comparison; And controller; It is electrically connected to the said switch element that is used for charge/discharge; To receive from the digital signal of said voltage detector output; And optionally to said switch element that is used to discharge and the said switch element output conducting/cut-off signal that is used to charge, thereby when institute's monitoring cell did not have complete charge/discharge, the charging/discharging method that determines with the battery capacity by institute's monitoring cell carried out charge/discharge to institute's monitoring cell; And during by charge/discharge fully, stop said charge/discharge at the institute monitoring cell.
14. hybrid battery according to claim 13, wherein said hybrid battery protective circuit further comprises: through current probe, it surveys the electric current that flows in the said polylith rechargeable battery, and breaks off the said switch element that is used for charge/discharge.
15. hybrid battery according to claim 13; Wherein one is used to prevent that the parasitic diode of reverse current is disposed between said controller and the said voltage detector, and said parasitic diode is connected to said controller and said voltage detector to form common ground potential.
16. hybrid battery according to claim 13, wherein said hybrid battery protective circuit comprises the semiconductor device integrated circuit in the single-chip package.
17. hybrid battery according to claim 13; Wherein said switch element that is used to charge and the said switch element that is used to discharge comprise N slot field-effect transistor or P-channel field-effect transistor (PEFT) transistor, and the said switch element that is used to charge or the said switch element that is used to discharge comprise that parasitic diode prevents reverse current.
18. the method that hybrid battery is charged comprises:
First step; One charged state in the polylith rechargeable battery that detection is being recharged with different capabilities; When the battery of being surveyed is not charged fully; The charging method that determines with the battery capacity by institute's monitoring cell begins the battery of being surveyed is charged, and when institute's monitoring cell is charged fully, stops said charging;
Second step is charged fully and after stopping said charging, another piece in the said polylith rechargeable battery is repeated said first step at institute's monitoring cell; With
Third step when all said polylith batteries are all charged fully, stops said polylith battery charge.
19. method according to claim 18 further may further comprise the steps: said first during the third step, flow, stop charge/discharge through breaking off a charge/discharge switch in response to the electric current that passes through that is higher than set breakdown current.
20. the method that hybrid battery is discharged comprises:
First step; One discharge condition in the polylith rechargeable battery that detection is being discharged with different capabilities; When the battery of being surveyed was not discharged fully, the charging method so that the battery capacity by institute's monitoring cell determines began the battery of being surveyed is discharged; And when the battery of being surveyed is discharged fully, stop said discharge;
Second step is discharged fully and after stopping said discharge, another piece in the said polylith rechargeable battery is repeated said first step at the battery of being surveyed;
Third step when all said polylith batteries are all discharged fully, stops said polylith battery discharge.
21. method according to claim 20 further may further comprise the steps: said first during the third step, flow, stop charge/discharge through breaking off a charge/discharge switch in response to the electric current that passes through that is higher than set breakdown current.
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