CN102544604A - Battery system and method for equalizing electric quantity among battery modules - Google Patents
Battery system and method for equalizing electric quantity among battery modules Download PDFInfo
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- CN102544604A CN102544604A CN2012100064659A CN201210006465A CN102544604A CN 102544604 A CN102544604 A CN 102544604A CN 2012100064659 A CN2012100064659 A CN 2012100064659A CN 201210006465 A CN201210006465 A CN 201210006465A CN 102544604 A CN102544604 A CN 102544604A
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Abstract
The invention provides a battery system and a method for equalizing electric quantity among battery modules. The battery system comprises more than two battery modules, a signal acquisition module, a residual electric quantity calculating module and a control module, wherein each battery module comprises a plurality of single batteries; a two-way isolation direct-current conversion circuit is arranged in each battery module; a sharing single battery is arranged between the two adjacent first battery modules and the two adjacent second battery modules in the battery system; a positive electrode and a negative electrode on one side of each of the two-way isolation direct-current conversion circuits in the first battery modules and the second battery modules are connected with positive electrodes and negative electrodes of the battery modules to which the two-way isolation direct-current conversion circuits belong; and a positive electrode and a negative electrode on the other side of each of the two-way isolation direct-current conversion circuits are connected with a positive electrode and a negative electrode of the sharing single battery of the first battery modules and the second battery modules. By the battery system and the method for equalizing the electric quantity among the battery modules, the electric quantity can be equalized among different battery modules.
Description
Technical field
The present invention relates to the administrative skill of battery, relate in particular to electric weight equalization methods between a kind of battery system and battery module, belong to technical field of lithium batteries.
Background technology
Along with the development of power lithium battery pool technology and pure electric automobile technology, lithium battery has replaced traditional lead-acid battery and Ni-MH battery becomes pure electric automobile the inside core energy storage device.Because the lithium battery monomer voltage has only 3-4 volt, the electric power system of electric automobile a large amount of lithium battery of need connecting usually, these lithium batteries are divided into a plurality of battery modules and connect respectively.For lithium battery; Or the rechargeable battery of other kinds; The monomer whose battery possibly the reason of aspect such as technology cause cell capacity and internal resistance inconsistency to occur owing to dispatching from the factory; Also maybe be inconsistent and cause battery capacity and internal resistance inconsistency to occur by the back aging speed that dispatches from the factory, the difference of the factors such as ambient temperature that also possibly move owing to cell causes the battery dump energy value inconsistency to occur.No matter be the electric automobile electric power system that battery directly is in series; Still earlier its battery strings is unified into battery module; Further series connection obtains the electric automobile electric power system again, and the inconsistency of above-mentioned battery performance has all proposed very high requirement to battery management system.
Because the inconsistency of cell performance, the performance of entire cell module and battery system receive the restriction of the most weak cell.For example when discharge, when a most weak joint cell reached minimum voltage, battery system must stop to discharge and protect this joint cell, but also had the capacity of other cells not exhaust in the battery system this moment; Equally, when charging, the cell that arrives ceiling voltage has at first hindered other cells and has continued charging, makes the entire cell system not charged cmpletely.And more crucial is that so after the circulation repeatedly, the inconsistency between the cell can be aggravated, and finally makes entire cell system available power reduce.The same with the battery system of electric automobile, all there is same problem in other any lithium battery systems.
At present, can't carry out the electric weight equilibrium at the different battery intermodules of battery system in the prior art.
Summary of the invention
The present invention provides electric weight equalization methods between a kind of battery system and battery module of electric automobile, is used to be implemented between the battery module of battery system carry out the electric weight equilibrium.
First aspect of the present invention provides a kind of battery system; Comprise plural battery module; Each battery module includes a plurality of cells; Also comprise signal acquisition module, dump energy computing module and control module; Be provided with two-way isolated DC change-over circuit in each battery module; And in said battery system, be provided with shared cell between any two first adjacent battery modules and said second battery module; Said shared cell is in said first battery module or said second battery module, and the positive pole of a side of the two-way isolated DC change-over circuit in said first battery module and said second battery module is connected with negative pole with the positive pole of its battery module that is belonged to respectively with negative pole, and the positive pole of opposite side is connected with negative pole with the positive pole of said shared cell respectively through switching circuit with negative pole;
Said signal acquisition module is used for gathering the said first adjacent battery module and the performance parameter information of said second all cells of battery module;
Said dump energy computing module is used for obtaining according to the performance parameter information of first all cells of battery module of signal acquisition module collection the residual electric quantity of all cells in said first battery module, and the residual electric quantity that is used for obtaining according to the performance parameter information of second all cells of battery module of signal acquisition module collection all cells in said second battery module;
Said control module is used for obtaining according to the residual electric quantity of said first all cells of battery module the residual electric quantity of said first battery module; And the residual electric quantity of obtaining said second battery module according to the residual electric quantity of all cells in said second battery module; Two-way isolated DC change-over circuit to the bigger battery module of residual electric quantity sends by first indication of battery module to shared cell charging, and indicates to second of charging battery module by sharing cell to the two-way isolated DC change-over circuit transmission of the less battery module of residual electric quantity;
Said two-way isolated DC change-over circuit is used for being charged to shared cell by the bigger battery module of said residual electric quantity according to the first indication control of control module, and controls by shared cell to the less charging battery module of said residual electric quantity according to second indication of said control module.
Another aspect of the present invention provides electric weight equalization methods between a kind of battery module; Be used for carrying out electric weight equilibrium between battery module at the battery system that comprises plural battery module; Each battery module includes a plurality of cells; This battery system also comprises signal acquisition module, dump energy computing module and control module; Be provided with two-way isolated DC change-over circuit in each battery module, in said battery system, be provided with shared cell between any two first adjacent battery modules and said second battery module, said shared cell is in said first battery module or said second battery module; The positive pole of one side of the two-way isolated DC change-over circuit in said first battery module and said second battery module is connected with negative pole with the positive pole of its battery module that is belonged to respectively with negative pole; The positive pole of opposite side is connected with negative pole with the positive pole of said shared cell respectively through switching circuit with negative pole, it is characterized in that said method comprises:
Signal acquisition module is gathered the performance parameter information of all cells in said adjacent first battery module and said second battery module;
The dump energy computing module obtains the residual electric quantity of all cells in said first battery module according to the performance parameter information of all cells in first battery module of signal acquisition module collection, and obtains the residual electric quantity of all cells in said second battery module according to the performance parameter information of all cells in second battery module of signal acquisition module collection;
Control module is obtained the residual electric quantity of said first battery module according to the residual electric quantity of all cells in said first battery module; And the residual electric quantity of obtaining said second battery module according to the residual electric quantity of all cells in said second battery module; Two-way isolated DC change-over circuit to the bigger battery module of residual electric quantity sends by first indication of battery module to shared cell charging, and indicates to second of charging battery module by sharing cell to the two-way isolated DC change-over circuit transmission of the less battery module of residual electric quantity;
The two-way isolated DC change-over circuit of the battery module that residual electric quantity is bigger charge to shared cell according to the said first indication control battery module, and the two-way isolated DC change-over circuit of the less battery module of residual electric quantity is controlled shared cell to charging battery module according to said second indication.
In the technical scheme of the above embodiment of the present invention; Between two of battery system adjacent battery modules, be provided with shared cell; And be provided with two-way isolated DC change-over circuit for each battery module; The performance parameter information of the cell of gathering through signal acquisition module; And the calculating of dump energy computing module can obtain the residual electric quantity of these two adjacent battery modules, confirms the battery module needs charging that residual electric quantity is less according to the residual electric quantity of above-mentioned two battery modules then, and the battery module that residual electric quantity is bigger needs discharge; Need the battery module of discharge to discharge by two-way isolated DC change-over circuit control to the shared cell of the two; And,, can be implemented in different battery intermodules and carry out the electric weight equilibrium through above-mentioned technical scheme by the charging battery module of two-way this shared cell of isolated DC change-over circuit control to the needs charging.
Description of drawings
Fig. 1 is the structural representation of battery system in the embodiment of the invention;
Fig. 2 is the flow chart of steps of electric weight equalization methods between battery module in the embodiment of the invention.
Embodiment
To carrying out the balanced problem of electric weight in the prior art at the different battery intermodules of battery system; The embodiment of the invention provides a kind of technical scheme; Fig. 1 is the structural representation of battery system in the embodiment of the invention; As shown in Figure 1; The plural battery module of this battery system, each battery module includes a plurality of cells, in addition; This battery system also comprises signal acquisition module 13, dump energy computing module 14 and control module 15; And two the first adjacent battery modules 11 and second battery module 12 include two-way isolated DC change-over circuit 16 in the said battery system, the positive pole of a side of said two-way isolated DC change-over circuit 16 and negative pole respectively with its under the positive pole of battery module be connected with negative pole, the positive pole of the opposite side of said two-way isolated DC change-over circuit 16 is connected with negative pole with the positive pole of said first battery module 11 and the shared cell 17 of said second battery module 12 respectively through switching circuit with negative pole; Above-mentioned signal acquisition module 13 is used for gathering the said first adjacent battery module and the performance parameter information of said second all cells of battery module; The performance parameter information of first all cells of battery module that dump energy computing module 14 is used for gathering according to signal acquisition module 13 obtains the residual electric quantity of all cells in said first battery module, and the residual electric quantity that is used for obtaining according to the performance parameter information of second all cells of battery module of signal acquisition module collection all cells in said second battery module; Control module 15 is used for obtaining according to the residual electric quantity of said first all cells of battery module the residual electric quantity of said first battery module; And the residual electric quantity of obtaining said second battery module according to the residual electric quantity of all cells in said second battery module; Two-way isolated DC change-over circuit 16 to the bigger battery module of residual electric quantity sends by first indication of battery module to shared cell 17 chargings, and indicates to second of charging battery module by sharing cell 17 to two-way isolated DC change-over circuit 16 transmissions of the less battery module of residual electric quantity; Two-way isolated DC change-over circuit 16 is used for being charged to shared cell 17 by the bigger battery module of said residual electric quantity according to the first indication control of control module 15, and controls by shared cell 17 to the less charging battery module of said residual electric quantity according to second indication of said control module 15.
In the technical scheme of the above embodiment of the present invention; Between two of battery system adjacent battery modules, be provided with shared cell; And be provided with two-way isolated DC change-over circuit for each battery module; The performance parameter information of the cell of gathering through signal acquisition module; And the calculating of dump energy computing module can obtain the residual electric quantity of these two adjacent battery modules, confirms the battery module needs charging that residual electric quantity is less according to the residual electric quantity of above-mentioned two battery modules then, and the battery module that residual electric quantity is bigger needs discharge; Need the battery module of discharge to discharge by two-way isolated DC change-over circuit control to the shared cell of the two; And,, can be implemented in different battery intermodules and carry out the electric weight equilibrium through above-mentioned technical scheme by the charging battery module of two-way this shared cell of isolated DC change-over circuit control to the needs charging.
The signal acquisition module in the above-mentioned enforcement of the present invention and the set-up mode of dump energy computing module are various; Signal acquisition module wherein can be made up of a plurality of signal gathering unit, the corresponding battery module of each signal gathering unit, and the performance parameter information of cell is by the signal gathering unit collection in each battery module; And corresponding; Also for each battery module is provided with a dump energy computing unit, calculating the residual electric quantity of all cells in the corresponding battery module, the position specifically is set for above-mentioned signal gathering unit and dump energy computing unit; Both can be in each battery module; Also can be on the management equipment of entire cell system, and, also can be the signal gathering unit dispersed placement; Be provided with one and the dump energy computing module is concentrated, and the dump energy computing module can synthesize as a whole integrated setting with control module.
In the above embodiment of the present invention; Be to be illustrated to the electric weight equilibrium between two battery modules in the battery system; For the situation that more a plurality of battery modules are arranged; Technical scheme of the present invention also can be suitable for; Promptly can be through between any two adjacent battery modules, shared cell being set, simultaneously for each battery module is provided with two-way isolated DC change-over circuit, the positive pole of a side of this two-way isolated DC change-over circuit and negative pole respectively with its under the positive pole of battery module be connected with negative pole; The positive pole of the opposite side of this two-way isolated DC change-over circuit is connected with negative pole with the positive pole of shared cell respectively with negative pole; In addition, for one of them battery module, if all be provided with shared cell between itself and adjacent two battery modules; Then the opposite side of its two-way isolated DC change-over circuit can selectivity be connected with negative pole with the positive pole that arbitrary needs carry out the balanced shared cell of intermodule electric weight, and concrete can realize above-mentioned connection by control module gating matrix switch.For example in Fig. 1; First battery module wherein can also comprise a shared cell 18; Should share cell 18 and can be used for carrying out the electric weight equilibrium with another adjacent second battery module (not shown) of first battery module, control module can also be used for selecting through matrix switch positive pole and the both positive and negative polarity that negative pole is connected respectively to the shared cell of first battery module and arbitrary second battery module of opposite side of the two-way isolated DC change-over circuit of first battery module simultaneously.
In the above embodiment of the present invention; The performance parameter information that signal acquisition module 11 is wherein gathered can comprise voltage parameter, temperature parameter; And charge parameter and/or discharge parameter; Said charge parameter comprises charging current parameter and charging interval parameter, said discharge parameter comprise the discharging current parameter and discharge time parameter;
And in concrete implementation process; Can a signal acquisition module be set for a battery system unification; Or also can a signal gathering unit all be set for each battery module; For example for two the first adjacent battery modules and second battery module; Above-mentioned signal acquisition module comprises first signal gathering unit and secondary signal collecting unit, and first signal gathering unit is used for gathering voltage parameter, the temperature parameter of said first all cells of battery module, and charge parameter and/or discharge parameter; The secondary signal collecting unit is used for gathering voltage parameter, the temperature parameter of said second all cells of battery module, and charge parameter and/or discharge parameter.
For the dump energy computing module; Also can a dump energy computing module be set or also can a dump energy computing unit all be set for a battery system unification for each battery module; For example for the first adjacent battery module and second battery module; The dump energy computing module comprises the first dump energy computing unit and the second dump energy computing unit; The first dump energy computing unit is used for obtaining according to the said voltage parameter of the first signal gathering unit collection and temperature parameter the capacity of first all cells of battery module; And the available power of further obtaining all cells in first battery module according to charge parameter and/or discharge parameter, obtain the residual electric quantity of all cells; The second dump energy computing unit is used for obtaining according to the said voltage parameter of secondary signal collecting unit collection and temperature parameter the capacity of second all cells of battery module; And the available power of further obtaining each cell in second battery module according to charge parameter and/or discharge parameter; Obtain the residual electric quantity of all cells; Concrete; For each cell, its residual electric quantity is the ratio of capacity of available power and the cell of each cell.
For the signal acquisition module in the foregoing description; Its signal that gets access at first possibly be an analog signal, then also need carry out analog-to-digital conversion, is to send to the dump energy computing module behind the digital quantity with the analog signal conversion that collects; In addition; For the dump energy computing module, it can be the module that is provided with separately, also can be to be integrated into a physical entity with control module.
In the above embodiment of the present invention; Obtain the residual electric quantity of first battery module at last; In technical scheme of the present invention, can think that the residual electric quantity of interior each cell of battery module is identical, it is balanced that perhaps electric weight has been carried out in battery module inside; The residual electric quantity of wherein each cell is basic identical, can adopt the residual electric quantity of the dump energy value representation battery module of any cell.In addition; When the residual electric quantity of different monomers battery has difference in a battery module; The mean value of residual electric quantity that can select all cells is as the residual electric quantity of this battery module; The residual electric quantity that is above-mentioned first battery module is the mean value of the residual electric quantity of all cells in first battery module, and the residual electric quantity of second battery module is the mean value of the residual electric quantity of all cells in second battery module.
Concrete; Electric weight for battery module inside is balanced; In the above-described embodiments; By the agency of signal gathering unit and dump energy computing unit can obtain the residual electric quantity of all cells in the battery module, the positive pole of a side of two-way isolated DC change-over circuit and positive pole and the negative pole that negative pole is connected to battery module simultaneously, the positive pole of the opposite side of two-way isolated DC change-over circuit and negative pole can be connected to the positive pole and the negative pole of any cell through switch matrix; When the residual electric quantity that gets access to the inner a certain cell of battery module is very little or very big; Realize that through controlling two-way isolated DC change-over circuit battery module charges to cell easily, or cell discharges to battery module, balanced to realize the inner electric weight of battery module.This two-way isolated DC change-over circuit is equivalent to an energy conversion device; When shared cell is charged; Through controlling sense of current in the circuit that itself and shared cell form, can realize that battery module passes through two-way isolated DC change-over circuit and charges to shared cell; Through controlling sense of current in the circuit that itself and cell form, can also realize that battery module passes through two-way isolated DC change-over circuit to sharing the cell discharge, promptly shares cell to charging battery module.
Control module in the above embodiment of the present invention also is used for the residual electric quantity according to first battery module; And the residual electric quantity of said second battery module is obtained the bigger battery module of residual electric quantity to the size of current and the charging interval of sharing the cell charging; Control module is carried said to the size of current and the charging interval of sharing the cell charging in first indication of the two-way isolated DC change-over circuit transmission of the bigger battery module of residual electric quantity, specifically to be controlled discharging and recharging according to indication by two-way isolated DC change-over circuit; And also be used to obtain size of current and the charging interval of shared cell to the less charging battery module of said residual electric quantity; Said control module is carried said size of current and the charging interval to the less charging battery module of said residual electric quantity in second indication of the two-way isolated DC change-over circuit transmission of the less battery module of residual electric quantity, to be controlled discharging and recharging according to indication by two-way isolated DC change-over circuit.
For example, for two battery module A in the battery system and battery module B, wherein obtain the capacity of each cell according to the performance parameter information of all cells in each battery module; For the first battery module A, its total capacity is 1000Ah, and its residual electric quantity is 80%; For battery module B, its total capacity is 1000Ah also in addition, and its residual electric quantity is 90%; Can confirm that battery module B is to shared cell charging 50Ah this moment; Also will be and share cell to battery module A charging 50Ah, if the electric current of above-mentioned charging all is made as 10A, then the charging interval is 5 hours.Above-mentioned battery module A is to sharing the cell charging; And shared cell charges and can carry out simultaneously battery module B; Also can be at battery module A to after sharing cell charging completion; By shared cell battery module B is charged again, as long as can keep sharing the interior electric weight of cell greater than zero.
The present invention also provides electric weight equalization methods between a kind of battery module; This method is carried out electric weight equilibrium between battery module in comprising the battery system of plural battery module; Each battery module includes a plurality of cells; This battery system also comprises signal acquisition module, dump energy computing module and control module; Be provided with two-way isolated DC change-over circuit in each battery module; In said battery system, be provided with shared cell between any two first adjacent battery modules and said second battery module; Said shared cell is in said first battery module or said second battery module, and the positive pole of a side of the two-way isolated DC change-over circuit in said first battery module and said second battery module is connected with negative pole with the positive pole of its battery module that is belonged to respectively with negative pole, and the positive pole of opposite side is connected with negative pole with the positive pole of said shared cell respectively through switching circuit with negative pole.Fig. 2 is the flow chart of steps of electric weight equalization methods between battery module in the embodiment of the invention, and is as shown in Figure 2, comprises following step:
The two-way isolated DC change-over circuit of step 104, battery module that residual electric quantity is bigger charge to shared cell according to the said first indication control battery module, and the two-way isolated DC change-over circuit of the less battery module of residual electric quantity is controlled shared cell to charging battery module according to said second indication.
In the technical scheme of the above embodiment of the present invention; Between two of battery system adjacent battery modules, be provided with shared cell; And be provided with two-way isolated DC change-over circuit for each battery module; The performance parameter information of the cell of gathering through signal acquisition module; The dump energy computing module calculates and obtains the residual electric quantity of all cells in two battery modules; Control module is further confirmed the residual electric quantity of two battery modules, confirms the battery module needs charging that residual electric quantity is less according to the residual electric quantity of above-mentioned two battery modules then, and the battery module that residual electric quantity is bigger needs discharge; Two-way isolated DC change-over circuit control by being arranged in the battery module needs the battery module of discharge to discharge to the shared cell of the two; And be arranged on this shared cell of two-way isolated DC change-over circuit control in the battery module to the charging battery module of needs charging, through above-mentioned technical scheme, can realize that different battery intermodules carry out the electric weight equilibrium.
In the above embodiment of the present invention; The residual electric quantity of wherein above-mentioned first battery module is the mean value in the residual electric quantity of all cells in first battery module, and the residual electric quantity of second battery module is the mean value in the residual electric quantity of all cells in second battery module.
In addition; Performance parameter information in the foregoing description can comprise voltage parameter, temperature parameter; And charge parameter and/or discharge parameter, said charge parameter comprises charging current parameter and charging interval parameter, said discharge parameter comprise the discharging current parameter and discharge time parameter.
Dump energy computing module in the above-mentioned steps 102 comprises according to the residual electric quantity that the performance parameter information of all cells in first battery module of signal acquisition module collection obtains all cells in said first battery module:
The capacity that the dump energy computing module obtains all cells in first battery module according to the voltage parameter and the temperature parameter of all cells in first battery module, and the residual electric quantity of further obtaining all cells in first battery module according to charge parameter and/or discharge parameter;
Dump energy computing module in the above-mentioned steps 102 comprises according to the residual electric quantity that the performance parameter information of all cells in second battery module of signal acquisition module collection obtains all cells in said second battery module:
The capacity that the dump energy computing module obtains all cells in second battery module according to the voltage parameter and the temperature parameter of all cells in second battery module, and the residual electric quantity of further obtaining all cells in second battery module according to charge parameter and/or discharge parameter.
In addition; Above-mentioned control module can also be according to the residual electric quantity of said first battery module; And the residual electric quantity of said second battery module obtains the bigger battery module of residual electric quantity to the size of current and the charging interval of sharing the cell charging, said control module with said to the size of current of sharing the cell charging and charging interval be carried at said first send to the bigger battery module of said residual electric quantity in indicating two-way isolated DC change-over circuit;
Above-mentioned control module can also be according to the residual electric quantity of said first battery module; And the residual electric quantity of said second battery module obtains and shares cell to the size of current and the charging interval of the less charging battery module of said residual electric quantity, said control module will said shared cell to the size of current of the less charging battery module of said residual electric quantity and charging interval be carried at said second send to the less battery module of said residual electric quantity in indicating two-way isolated DC change-over circuit.
Electric weight equalization methods between the battery module that each embodiment of the present invention provides can in said battery system discharge process, or carry out equilibrium to the electric weight between said battery module under the static situation in the process to said battery system charging.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each method embodiment can be accomplished through the relevant hardware of program command.Aforesaid program can be stored in the computer read/write memory medium.This program the step that comprises above-mentioned each method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
What should explain at last is: above each embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although the present invention has been carried out detailed explanation with reference to aforementioned each embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, perhaps to wherein part or all technical characteristic are equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (10)
1. battery system; Comprise plural battery module; Each battery module includes a plurality of cells; It is characterized in that, also comprise signal acquisition module, dump energy computing module and control module, be provided with two-way isolated DC change-over circuit in each battery module; And in said battery system, be provided with shared cell between any two first adjacent battery modules and said second battery module; Said shared cell is in said first battery module or said second battery module, and the positive pole of a side of the two-way isolated DC change-over circuit in said first battery module and said second battery module is connected with negative pole with the positive pole of its battery module that is belonged to respectively with negative pole, and the positive pole of opposite side is connected with negative pole with the positive pole of said shared cell respectively through switching circuit with negative pole;
Said signal acquisition module is used for gathering the said first adjacent battery module and the performance parameter information of said second all cells of battery module;
Said dump energy computing module is used for obtaining according to the performance parameter information of first all cells of battery module of signal acquisition module collection the residual electric quantity of all cells in said first battery module, and the residual electric quantity that is used for obtaining according to the performance parameter information of second all cells of battery module of signal acquisition module collection all cells in said second battery module;
Said control module is used for obtaining according to the residual electric quantity of said first all cells of battery module the residual electric quantity of said first battery module; And the residual electric quantity of obtaining said second battery module according to the residual electric quantity of all cells in said second battery module; Two-way isolated DC change-over circuit to the bigger battery module of residual electric quantity sends by first indication of battery module to shared cell charging, and indicates to second of charging battery module by sharing cell to the two-way isolated DC change-over circuit transmission of the less battery module of residual electric quantity;
Said two-way isolated DC change-over circuit is used for being charged to shared cell by the bigger battery module of said residual electric quantity according to the first indication control of control module, and controls by shared cell to the less charging battery module of said residual electric quantity according to second indication of said control module.
2. battery system according to claim 1; It is characterized in that; The residual electric quantity of said first battery module is the mean value of the residual electric quantity of all cells in said first battery module, and the residual electric quantity of said second battery module is the mean value of the residual electric quantity of all cells in said second battery module.
3. battery system according to claim 1; It is characterized in that; Said performance parameter information comprises voltage parameter, temperature parameter; And charge parameter and/or discharge parameter, said charge parameter comprises charging current parameter and charging interval parameter, said discharge parameter comprise the discharging current parameter and discharge time parameter;
Said signal acquisition module comprises first signal gathering unit and secondary signal collecting unit; Said first signal gathering unit is used for gathering voltage parameter, the temperature parameter of said first all cells of battery module; And charge parameter and/or discharge parameter; Said secondary signal collecting unit is used for gathering voltage parameter, the temperature parameter of said second all cells of battery module, and charge parameter and/or discharge parameter;
Said dump energy computing module comprises the first dump energy computing unit and the second dump energy computing unit; The said first dump energy computing unit is used for the capacity that obtains first all cells of battery module according to the said voltage parameter of the first signal gathering unit collection and temperature parameter; And the residual electric quantity of further obtaining all cells in first battery module according to charge parameter and/or discharge parameter; The said second dump energy computing unit is used for the capacity that obtains second all cell of battery module according to the said voltage parameter of secondary signal collecting unit collection and temperature parameter, and further obtains the residual electric quantity of all cells in second battery module according to charge parameter and/or discharge parameter.
4. according to claim 1,2 or 3 described battery systems; It is characterized in that; Said control module also is used for the residual electric quantity according to said first battery module; And the residual electric quantity of said second battery module obtains the bigger battery module of residual electric quantity to the size of current and the charging interval of sharing the cell charging, and control module is carried said to the size of current and the charging interval of sharing the cell charging in first indication that the two-way isolated DC change-over circuit of the bigger battery module of residual electric quantity sends; And,
Also be used to obtain and share cell to the size of current and the charging interval of the less charging battery module of said residual electric quantity, said control module is carried said size of current and the charging interval to the less charging battery module of said residual electric quantity in second indication of the two-way isolated DC change-over circuit transmission of the less battery module of residual electric quantity.
5. battery system according to claim 1; It is characterized in that; Also comprise matrix switch; And the number of second battery module adjacent with said first battery module is two, and said control module also is used for selecting through matrix switch positive pole and the both positive and negative polarity that negative pole is connected respectively to the shared cell of said first battery module and arbitrary second battery module of opposite side of the two-way isolated DC change-over circuit of said first battery module.
6. electric weight equalization methods between a battery module; Be used for carrying out electric weight equilibrium between battery module at the battery system that comprises plural battery module; Each battery module includes a plurality of cells; This battery system also comprises signal acquisition module, dump energy computing module and control module; Be provided with two-way isolated DC change-over circuit in each battery module, in said battery system, be provided with shared cell between any two first adjacent battery modules and said second battery module, said shared cell is in said first battery module or said second battery module; The positive pole of one side of the two-way isolated DC change-over circuit in said first battery module and said second battery module is connected with negative pole with the positive pole of its battery module that is belonged to respectively with negative pole; The positive pole of opposite side is connected with negative pole with the positive pole of said shared cell respectively through switching circuit with negative pole, it is characterized in that said method comprises:
Signal acquisition module is gathered the performance parameter information of all cells in said adjacent first battery module and said second battery module;
The dump energy computing module obtains the residual electric quantity of all cells in said first battery module according to the performance parameter information of all cells in first battery module of signal acquisition module collection, and obtains the residual electric quantity of all cells in said second battery module according to the performance parameter information of all cells in second battery module of signal acquisition module collection;
Control module is obtained the residual electric quantity of said first battery module according to the residual electric quantity of all cells in said first battery module; And the residual electric quantity of obtaining said second battery module according to the residual electric quantity of all cells in said second battery module; Two-way isolated DC change-over circuit to the bigger battery module of residual electric quantity sends by first indication of battery module to shared cell charging, and indicates to second of charging battery module by sharing cell to the two-way isolated DC change-over circuit transmission of the less battery module of residual electric quantity;
The two-way isolated DC change-over circuit of the battery module that residual electric quantity is bigger charge to shared cell according to the said first indication control battery module, and the two-way isolated DC change-over circuit of the less battery module of residual electric quantity is controlled shared cell to charging battery module according to said second indication.
7. electric weight equalization methods between battery module according to claim 6; It is characterized in that; The residual electric quantity of said first battery module is the mean value of the residual electric quantity of all cells in said first battery module, and the residual electric quantity of said second battery module is the mean value of the residual electric quantity of all cells in said second battery module.
8. electric weight equalization methods between battery module according to claim 6; It is characterized in that; Said performance parameter information comprises voltage parameter, temperature parameter; And charge parameter and/or discharge parameter, said charge parameter comprises charging current parameter and charging interval parameter, said discharge parameter comprise the discharging current parameter and discharge time parameter; And
Said dump energy computing module comprises according to the residual electric quantity that the performance parameter information of all cells in first battery module of signal acquisition module collection obtains all cells in said first battery module:
The capacity that the dump energy computing module obtains all cells in all first battery modules according to the voltage parameter and the temperature parameter of all cells in first battery module, and the residual electric quantity of further obtaining all cells in first battery module according to charge parameter and/or discharge parameter; And
Said dump energy computing module comprises according to the residual electric quantity that the performance parameter information of all cells in second battery module of signal acquisition module collection obtains all cells in said second battery module:
The capacity that the dump energy computing module obtains all cells in second battery module according to the voltage parameter and the temperature parameter of all cells in second battery module, and the residual electric quantity of further obtaining all cells in second battery module according to charge parameter and/or discharge parameter.
9. electric weight equalization methods between battery module according to claim 6 is characterized in that, also comprises:
Said control module is according to the residual electric quantity of said first battery module; And the residual electric quantity of said second battery module obtains the bigger battery module of residual electric quantity to the size of current and the charging interval of sharing the cell charging, said control module with said to the size of current of sharing the cell charging and charging interval be carried at said first send to the bigger battery module of said residual electric quantity in indicating two-way isolated DC change-over circuit; And
Said control module is according to the residual electric quantity of said first battery module; And the residual electric quantity of said second battery module obtains and shares cell to the size of current and the charging interval of the less charging battery module of said residual electric quantity, said control module will said shared cell to the size of current of the less charging battery module of said residual electric quantity and charging interval be carried at said second send to the less battery module of said residual electric quantity in indicating two-way isolated DC change-over circuit.
10. according to electric weight equalization methods between the arbitrary described battery module of claim 6～9; It is characterized in that; In process, in said battery system discharge process, or under the static situation electric weight between said battery module is being carried out equilibrium to said battery system charging.
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| CN103995235A (en) * | 2014-06-02 | 2014-08-20 | 耿直 | Output current limiting method for storage battery modules in high-voltage storage battery pack |
| CN109088112A (en) * | 2018-02-07 | 2018-12-25 | 无锡瓴芯电子科技有限公司 | A kind of series-connected cell group modularization management system |
| WO2019184849A1 (en) * | 2018-03-30 | 2019-10-03 | 比亚迪股份有限公司 | Automobile, power battery pack equalization method and device |
| CN107534189B (en) * | 2015-04-03 | 2021-01-05 | 微软技术许可有限责任公司 | Battery management in a device having multiple batteries |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103427459A (en) * | 2013-07-29 | 2013-12-04 | 清华大学 | Battery pack capacity equilibrium method |
| CN103995235A (en) * | 2014-06-02 | 2014-08-20 | 耿直 | Output current limiting method for storage battery modules in high-voltage storage battery pack |
| CN107534189B (en) * | 2015-04-03 | 2021-01-05 | 微软技术许可有限责任公司 | Battery management in a device having multiple batteries |
| CN109088112A (en) * | 2018-02-07 | 2018-12-25 | 无锡瓴芯电子科技有限公司 | A kind of series-connected cell group modularization management system |
| WO2019184849A1 (en) * | 2018-03-30 | 2019-10-03 | 比亚迪股份有限公司 | Automobile, power battery pack equalization method and device |
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