CN101242106B - Crystal battery level balancer - Google Patents
Crystal battery level balancer Download PDFInfo
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- CN101242106B CN101242106B CN200810082499XA CN200810082499A CN101242106B CN 101242106 B CN101242106 B CN 101242106B CN 200810082499X A CN200810082499X A CN 200810082499XA CN 200810082499 A CN200810082499 A CN 200810082499A CN 101242106 B CN101242106 B CN 101242106B
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- 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
Abstract
The invention provides a crystal-format battery potential balancer for equalizing the potential of the series-wound battery group. At least one battery is bridge-connected to an energy converting circuit; the energy converting circuit is connected by crystal-format infrastructure. The energy converting circuit has four nodes, comprising a first semiconductor switch, a second semiconductor switch, a second diode and an inductance. one end of the first semiconductor switch is connected to cathode of the first diode; the anode of the second diode is connected to one end of the second semiconductor switch; the anode of the second diode is connected to one end of the second semiconductor switch; the inductance is energy-storing component, bridge-connected between the cathode of the first diode and anode of the second diode.
Description
The present invention is:
Application number is: 200510088430.4
The applying date is: on July 28th, 2005
Denomination of invention is: crystal battery level balancer
Divide an application
Technical field
The invention relates to a kind of level balancer of series-connected cell, refer to a kind of crystal battery level balancer especially.
Background technology
In most battery applications occasion, except the electronic equipment of minority low-voltage and low power consuming, all battery to be done series connection and use, this is that electric energy loss is bigger when using separately because single cell voltage is not high now.For instance, under identical load power, the system that adopts the series connection of four batteries is compared with the system that adopts single battery, its voltage and capacity are big four times, right its required output current only is 1/4th of a monocell system, can reduce by 16 times circuit loss so approximately.Use series battery that though its advantage is arranged, yet, only it be considered as a tool high voltage and jumbo " monocell " if do not consider between monocell property difference each other, will overall efficiency in practical application not as originally expecting.
Characteristics such as the charge/discharge capacity of secondary cell, charging conversion efficiency, initial electric weight, internal resistance, even same series-produced product also can't be identical, so directly these had slightly the use that is together in series of the monocell of difference, perhaps when just bringing into use, is there anything wrong not think performance, yet increase along with repeating to discharge and recharge access times, the user can find gradually that the spendable time of battery supply is shorter and shorter, usually need to charge again, in addition when discharging and recharging, feel high when the temperature of battery pack is compared with new battery; This leads because of when battery pack is just brought into use, difference is little each other between monocell, but along with discharging and recharging time when increasing, with the difference that strengthens gradually each other, so vicious circle, make the characteristic difference monocell worse and worse, cause the usefulness of whole battery group all to be subject to the relatively poor monocell of these a little characteristics.Therefore, industry is for solving described problem at present, must monitor the battery of each monocell in the series battery, and utilize battery level balancer to come between the balance monocell to cause the phenomenon of energy storage inequality, and then promote battery pack reality and can charge and discharge electric weight and increase the service life because of property difference each other.
The size of each battery terminal voltage and battery capacity and stored electric weight thereof are relevant in the series battery, desire to make each cell voltage to equate, are a kind of energy transfer action; In other words, be about to the higher energy consumption of cell voltage or be transferred in the lower battery of voltage.In classification with energy consumption whether, can be divided into deflection type and on-consumable formula two class cell potential balancing apparatus: the former energy that cell voltage is higher utilizes the switched ohmic load to change heat energy into or uses the switched buffer capacitor, reaches the purpose of the balance of voltage; The latter adopts the suitching type direct current transducer that energy is transmitted in battery, and it if ignore the switch switch cost, can reach loss-free transmission in theory.On-consumable formula cell potential balancing apparatus is if shift whether involve total energy content of battery transfer with energy, can be further divided into two kinds of total electric weight apportion design and unit electric weight apportion designs: the former draws or inculcates total series-connected cell energy, with each cell voltage of balance, the latter then sees through the energy delivery between adjacent single cells, reaches the balance purpose.Wherein, if the electric power converter that adopts for mutually independently, then is called the decentralized cell potential balancing apparatus, relatively,, be called the concentrated cell potential balancing apparatus in total electric weight apportion design if adopt single electric power converter.
According to prior art, Fig. 1 shows a kind of circuit framework figure of deflection type cell potential balancing apparatus, by action by switch, the energy consumption of the battery 3 that terminal voltage is higher is in the load resistance of level balancer 2 out of the ordinary, though circuit framework is simple, need detects and heat dissipation problem arranged battery terminal voltage out of the ordinary.In on-consumable formula cell potential balancing technique, Fig. 2 shows a kind of circuit framework figure of the cell potential balancing apparatus that distributes based on the unit electric weight, basically be balancing with adjacent two element cells, the energy of terminal voltage the higher person is sent to the junior, circuit framework has the module extendibility; Fig. 3 shows a kind of circuit framework figure of the decentralized cell potential balancing apparatus that distributes based on total electric weight, all direct current transducer circuit are for mutually independently, when cell voltage differs from mean value, start the direct current transducer circuit, the too high energy content of battery is detached and is transferred to series battery or provides the battery 3 of additional energy to low voltage by series battery, so the control degrees of freedom height; Fig. 4 shows a kind of circuit framework figure of the concentrated cell potential balancing apparatus that distributes based on total electric weight, uses single direct current transducer as each battery balancer system in the series battery, and in theory, this centralized equalizer circuit volume is less, cost is lower.
Summary of the invention
The purpose of this invention is to provide a kind of crystal battery level balancer, it is applicable to on-consumable formula or staged cell potential balancing apparatus.
For achieving the above object, technical solution of the present invention is:
A kind of crystal battery level balancer is provided, and the current potential in order to the series battery such as gradeization is characterized in that: each monocell cross-over connection is in a power conversion circuits, and this power conversion circuits connects with the crystal lattice type framework.
Wherein, this power conversion circuits has a first node, one Section Point, one the 3rd node and one the 4th node, described first node to the three nodes connect in regular turn one first semiconductor switch and one first diode, and the 3rd node is the positive pole of this first diode, described Section Point to the four nodes connect in regular turn one second diode and one second semiconductor switch, and this Section Point is the negative pole of this second diode, one energy-storage travelling wave tube has one first end and one second end, this first is terminated between described first semiconductor switch and first diode, and this second is terminated between described second diode and second semiconductor switch.
The crystal battery level balancer of being implemented according to the present invention, to make product have simple circuit framework and be easy to and make, and the dressing of modularity circuit bank is easy, crystal battery level balancer of the present invention is not owing to need transformer, so the tool greater efficiency, and can operate in discontinuous mode and reach zero current and switch, reduce switching losses, in addition, the present invention organizes the Balance Control policy selection of changes such as current potential many for series-connected cell.
Description of drawings
Fig. 1 is the circuit framework figure of deflection type cell potential balancing apparatus;
Fig. 2 is the circuit framework figure based on the cell potential balancing apparatus of unit electric weight distribution;
Fig. 3 is the circuit framework figure based on the decentralized cell potential balancing apparatus of total electric weight distribution;
Fig. 4 is the circuit framework figure based on the concentrated cell potential balancing apparatus of total electric weight distribution;
Fig. 5 is a staged cell potential balancing circuitry Organization Chart of the present invention;
Fig. 6 is the circuit framework figure of crystal battery level balancer of the present invention;
Fig. 7 is the circuit framework figure of power conversion circuits of the present invention;
Fig. 8 is the circuit framework figure of crystal battery level balancer of the present invention, wherein the clear energy storage current path that discloses of a power conversion circuits;
Fig. 9 for releasing of power conversion circuits of the present invention can current path figure;
Figure 10 is the circuit framework figure of crystal battery level balancer specific embodiment of the present invention.
Embodiment
Though the present invention will consult and contain the appended graphic of preferred embodiment of the present invention and fully describe, before describing, this should be appreciated that the personage who is familiar with one's own profession can be modified in invention described herein, obtains effect of the present invention simultaneously.Therefore, must understand following description to the personage that is familiar with one's own profession skill and Yan Weiyi discloses widely, and its content does not lie in restriction the present invention.
Please refer to Fig. 5, show staged cell potential balancing circuitry Organization Chart of the present invention.The invention provides a kind of cell potential balancing apparatus, comprise a plurality of level balancers, be applicable to high serial number battery occasion.This level balancer has hierarchy type framework 5, the ground floor of this hierarchy type framework (bottom) level balancer 2 is to carry out change such as current potential between adjacent single cells, and the later level balancer 2 of the second layer is to carry out change such as current potential between adjacent series battery 4 (or group), and wherein the number of batteries of the series battery 4 (or group) of higher level level balancer 2 grades is more than the number of batteries of the series battery 4 (or group) of lower level level balancer 2 grades.
In the embodiment shown in fig. 5, cell potential balancing apparatus of the present invention is exemplary to comprise nine level balancers, is used for the changes such as current potential of 12 battery strings joint groups, and this level balancer forms three layers pyramid structure 5.The ground floor level balancer carries out changes such as current potential respectively between the monocell to the series connection of two batteries, and the series connection of two batteries is considered as a group 4, so the corresponding group of ground floor level balancer 2 difference etc. change the current potential between monocell.Second layer level balancer 2 carries out changes such as current potential respectively to 4 of three groups, in other words, and the current potential between three series batteries such as second layer level balancer 2 gradeizations.The 3rd layer of level balancer then carries out between group changes such as current potential to two big groups, in other words, the 3rd layer of level balancer etc. are changed the current potential of (each series battery is connected by six batteries) between two series batteries.
Please refer to Fig. 6, show the circuit framework figure of crystal battery level balancer of the present invention.Crystal battery level balancer of the present invention is in order to monocell current potential or group's (series-connected cell) current potential of series battery such as gradeization, crystal battery level balancer as shown in Figure 6 is the monocell current potential of series battery such as gradeization, and wherein monocell 3 can be replaced by a group or a series connection battery.Crystal battery level balancer of the present invention comprises a plurality of power conversion circuits 10, each power conversion circuits 10 corresponding monocell 3 or group, and this power conversion circuits 10 forms with crystal lattice type framework 20, and this crystal lattice type framework 20 is as shown in Figure 6.
Please refer to Fig. 7, show the circuit framework figure of power conversion circuits of the present invention.Power conversion circuits 10 of the present invention is one to have the network of four nodes, is respectively node 1, node 2, node 3 and node 4.This power conversion circuits 10 comprises an inductance L, the first element switch SW1, the first diode D1, the second element switch SW2 and the second diode D2, connect the in regular turn first element switch SW1 and the first diode D1 of node 1 to node 3 wherein, and the positive pole of the first diode D1 (the P utmost point) to be the negative pole (the N utmost point) of node 3, the first diode D1 connect one of first element switch SW1 end; Node 2 to node 4 connect the in regular turn second diode D2 and the second element switch SW2 connect the end of the second element switch SW2 and the negative pole of the second diode D2 is the positive pole of node 2, the second diode D2; This inductance L cross-over connection is between the positive pole of the negative pole of the first diode D1 and the second diode D2.
In preferred embodiment of the present invention, inductance L is the energy-storage travelling wave tube of power conversion circuits 10, by by the conducting (ON) of the control first element switch SW1 and the second element switch SW2 with close (OFF) state, can make power conversion circuits operate in the energy storage pattern or release the energy pattern.When the control first element switch SW1 and the second element switch SW2 are conducting, cross-over connection between node 1 and node 4 monocell or series-connected cell with electrical power storage in this inductance L; When controlling the first element switch SW1 and the second element switch SW2 respectively for closing or another switch of one switch conduction when closing, the conducting or the cut-off state of then looking the first diode D1 and the second diode D2 will be discharged the electric energy of inductance L by two different nodes.In addition, in specific embodiment, first element switch and second element switch can close thyristor (GTO) or silicon control rectification crystal (SCR) constant power semiconductor element switch is implemented by igbt (IGBT, insulated gate bipolar transistor) or lock.
Please refer to Fig. 8, show the circuit framework figure of crystal battery level balancer of the present invention, wherein a power conversion circuits 10 clear circuit frameworks that disclose.The crystal battery level balancer according to the present invention can carry out the changes such as current potential of series battery, and each power conversion circuits 10 can be converted to all the other series-connected cells with the electric energy of a monocell or a group (series-connected cell).At embodiment shown in Figure 8, series battery is to be composed in series the node 1 and the node 4 of energy-storage battery 30 cross-over connections one power conversion circuits 10 in crystal lattice type framework 20 with back battery pack 32 by preceding battery pack 31, energy-storage battery 30 in regular turn.When the first element switch SW1 and the second element switch SW2 were conducting, power conversion circuits 10 operated in the energy storage pattern, the energy storage current i of energy-storage battery along energy storage current path 41 with electrical power storage in inductance L.
And then with reference to figure 9, show that releasing of power conversion circuits of the present invention can current path figure, and remaining power conversion circuits is not drawn.When the first element switch SW1 is conducting and the second element switch SW2 when closing, power conversion circuits 10 is that first release can pattern, the first diode D1 ends because of connect with back battery pack 32 bias voltage of current potential of energy-storage battery 30, the second diode D2 conducting, releasing of inductance L can current i be released extremely preceding battery pack 31 along energy storage current path 42 with electric energy.
When the first element switch SW1 is conducting for closing the second element switch SW2, power conversion circuits 10 is that second release can pattern, the second diode D2 ends because of connect with energy-storage battery 30 bias voltage of current potential of preceding battery pack 31, the first diode D1 conducting, releasing of inductance L can current i be released extremely back battery pack 32 along energy storage current path 43 with electric energy.
When the first element switch SW1 for close and the second element switch SW2 when closing, power conversion circuits is that the 3rd release can pattern, the first diode D1 and the second diode D2 conducting, releasing of inductance L can current i be released extremely whole series battery along energy storage current path 44 with electric energy.
Please refer to Figure 10 at last, show the circuit framework figure of crystal battery level balancer specific embodiment of the present invention.This embodiment is with three power conversion circuits 11,12,13 composition crystal lattice type frameworks are example, and each power conversion circuits can corresponding monocell or series-connected cell, the node 1 of the power conversion circuits 11 of wherein corresponding first monocell 31 or first group of series-connected cell 31 is connected with node 2, this power conversion circuits 11 operates second only, and release with the third can pattern, and store electrical energy is released into back battery pack 30,32 or whole series batteries; The node 3 of the power conversion circuits 13 of corresponding last monocell 32 or last group series-connected cell 32 is connected with node 4, this power conversion circuits 13 operates first only, and release with the third can pattern, store electrical energy is released into preceding battery pack 31,30 or whole series batteries.
Crystal battery level balancer shown in Figure 10 can be applicable to staged cell potential balancing apparatus shown in Figure 5.When power conversion circuits 11,12, during 13 respectively corresponding monocells, then this crystal battery level balancer is then implemented the ground floor level balancer of staged cell potential balancing apparatus; When power conversion circuits 11,12, during 13 respectively corresponding series-connected cells of being made up of two above batteries, then this crystal battery level balancer is then implemented the second layer level balancer or the higher level level balancer of staged cell potential balancing apparatus.
After describing preferred embodiment of the present invention in detail, being familiar with this technology personage can clearly understand, can carry out various variations and change not breaking away under the application's claim and the spirit, and the present invention also is not subject to the execution mode of the illustrated embodiment of specification, and for example: the power conversion circuits of crystal battery level balancer can corresponding monocell or series-connected cell; The also applicable cell potential balancing apparatus that distributes based on the unit electric weight of crystal battery level balancer.
Claims (8)
1. crystal battery level balancer, the current potential in order to the series battery such as gradeization is characterized in that:
At least one battery cross-over connection is in a power conversion circuits, this power conversion circuits connects with the crystal lattice type framework, each power conversion circuits comprises one first semiconductor switch, one first diode, one second semiconductor switch, one second diode and an inductance, wherein said inductance cross-over connection is in the negative pole tie point of this first semiconductor switch and first diode and the anodal tie point of this second semiconductor switch and second diode, and the anode of this at least one battery and negative terminal are connected to this first semiconductor switch and this second semiconductor switch.
2. crystal battery level balancer as claimed in claim 1 is characterized in that: this of described power conversion circuits first semiconductor switch and this second semiconductor switch be all during conducting, at least one battery with electrical power storage in this inductance.
3. crystal battery level balancer as claimed in claim 2 is characterized in that: when the first semiconductor switch conducting of described power conversion circuits and second semiconductor switch were closed, described inductance discharged the series battery of electric energy to part.
4. crystal battery level balancer as claimed in claim 2 is characterized in that: first semiconductor switch of described power conversion circuits is closed and during the second semiconductor switch conducting, described inductance discharges the series battery of electric energy to part.
5. crystal battery level balancer as claimed in claim 2 is characterized in that: when first semiconductor switch of described power conversion circuits and second semiconductor switch were all closed, described inductance discharged electric energy to whole series batteries.
6. crystal battery level balancer as claimed in claim 1 is characterized in that: described first semiconductor switch and second semiconductor switch are igbt.
7. crystal battery level balancer as claimed in claim 1 is characterized in that: described first semiconductor switch and second semiconductor switch are that lock closes thyristor.
8. crystal battery level balancer as claimed in claim 1 is characterized in that: described first semiconductor switch and second semiconductor switch are silicon control rectification crystal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810082499XA CN101242106B (en) | 2005-07-28 | 2005-07-28 | Crystal battery level balancer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810082499XA CN101242106B (en) | 2005-07-28 | 2005-07-28 | Crystal battery level balancer |
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| CNB2005100884304A Division CN100524918C (en) | 2005-07-28 | 2005-07-28 | Lattice type battery level balancer |
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| CN101242106A CN101242106A (en) | 2008-08-13 |
| CN101242106B true CN101242106B (en) | 2011-04-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101577439B (en) * | 2005-07-28 | 2011-04-27 | 财团法人工业技术研究院 | Crystal lattice type battery potential balancer |
| CN101552479B (en) * | 2009-05-25 | 2010-12-08 | 青岛大学 | Direct-current voltage reducing circuit |
| CN102612793A (en) * | 2009-11-19 | 2012-07-25 | 罗伯特·博世有限公司 | Balancing electrical voltages of electrical accumulator units |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6064178A (en) * | 1998-05-07 | 2000-05-16 | Ford Motor Company | Battery charge balancing system having parallel switched energy storage elements |
| CN1644966A (en) * | 2004-01-21 | 2005-07-27 | 卡尔弗罗伊登柏格两合公司 | Radial lip seal device |
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2005
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6064178A (en) * | 1998-05-07 | 2000-05-16 | Ford Motor Company | Battery charge balancing system having parallel switched energy storage elements |
| CN1644966A (en) * | 2004-01-21 | 2005-07-27 | 卡尔弗罗伊登柏格两合公司 | Radial lip seal device |
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