CN205160118U - Equalization circuit for battery pack - Google Patents

Equalization circuit for battery pack Download PDF

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Publication number
CN205160118U
CN205160118U CN201520868052.0U CN201520868052U CN205160118U CN 205160118 U CN205160118 U CN 205160118U CN 201520868052 U CN201520868052 U CN 201520868052U CN 205160118 U CN205160118 U CN 205160118U
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China
Prior art keywords
battery
battery cell
parallel
battery pack
switch
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Active
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CN201520868052.0U
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Chinese (zh)
Inventor
李静
祝立根
华周发
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Beijing Pride New Energy Battery Co Ltd
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Beijing Pride New Energy Battery Co Ltd
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Priority to CN201520868052.0U priority Critical patent/CN205160118U/en
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Abstract

The utility model discloses an equalization circuit for battery pack, include the group battery of being established ties and being constituteed by a plurality of battery monomers, its characterized in that is still including anodal parallelly connected generating line, the parallelly connected generating line of negative pole, a plurality of battery monomer series connection on -off switch and the parallelly connected on -off switch of a plurality of battery monomer, battery monomer series connection break -make switching system is in adjacent two that establish ties between the battery monomer, the parallelly connected break -make switching system of battery monomer in every the free positive pole of battery with anodal parallelly connected generating line, every the free negative pole of battery with between the parallelly connected generating line of negative pole. The utility model provides an equalization circuit for battery pack, the battery monomer that can simply fast differ greatly the group battery internal voltage carries out energy transduction, realizes the quick harmless balanced of group battery.

Description

A kind of circuit of battery pack balancing
Technical field
The utility model relates to cell balancing field, particularly relates to a kind of circuit of battery pack balancing.
Background technology
Along with current environment protection and energy conservation become main flow, people start more and more widely battery pack to be applied in various dynamical system, the power source of such as electric automobile, the Emergency power supply unit of communication equipment and energy trasfer storage device etc.But, the battery of high-power high-capacity, due to technical restriction, can't large batch ofly be produced, the cell of low-power low capacity that is that the most often apply or technology maturation.And the energy that single battery provides is limited, numerous cells certainly will adopt the mode of series connection and (or) parallel connection to connect in groups by the electrical energy demands meeting various dynamical system, then these battery modules are carried out connecting and (or) being connected in parallel again, reach certain electric pressure and capacitance grade to meet the demand of people.
So large-scale connection in series-parallel battery, is difficult to the consistency ensureing battery cell in battery pack.In addition, battery pack, in the use procedure of continuous charge and discharge cycles, because aging degree is different, also can cause the difference of each cell more and more obvious.In battery pack, the inconsistency of battery cell can reduce the serviceability of battery pack, and shorten the useful life of battery pack, serious also may make some battery cell overcharge or overdischarge, badly damaged battery, even has the danger of battery explosion.
Utility model content
The purpose of this utility model is to provide a kind of circuit of battery pack balancing, quickly and easily battery cell larger for voltage differences in battery pack can be carried out energy trasfer, and the quick nondestructive realizing battery pack is balanced.
The utility model scheme is as follows:
A kind of circuit of battery pack balancing, comprises the battery pack be composed in series by multiple battery cell, also comprises battery management system, positive pole bus in parallel, negative pole bus in parallel, multiple battery cell series connection on-off switch and multiple battery cell on-off switch in parallel; Described serial battery on-off switch is arranged between two adjacent described battery cells of series connection, and described battery cell on-off switch in parallel is arranged between the negative pole bus in parallel with described negative pole of the positive pole bus in parallel with described positive pole of each described battery cell, each described battery cell.Described battery cell series connection on-off switch can be communicated with the series circuit of battery pack when needing battery pack work, in battery pack during the unbalanced and needs equilibrium of battery cell voltage, disconnect the connection of the series circuit of described battery cell and battery pack.Described battery cell on-off switch in parallel can disconnect the connection between the negative pole bus in parallel with described negative pole of the positive pole bus in parallel with described positive pole of described battery cell, described battery cell when needing the work of described battery pack, thus disconnect being connected in parallel between described battery cell, and described battery cell voltage is unbalanced and when needing balanced, be connected in parallel needing balanced described battery cell in described battery pack.
Further, described battery cell series connection on-off switch is battery cell series relay, and described battery management system completes the break-make of each described battery cell series circuit by controlling described battery cell series relay.
Further, described battery cell on-off switch in parallel is battery cell relay in parallel, and described battery management system completes the break-make of negative pole bus in parallel with described negative pole of the positive pole bus in parallel with described positive pole of each described battery cell, each described battery cell by controlling described battery cell relay in parallel.
Further, multiple described battery cell series connection on-off switch is integrated into a total lock of series connection break-make, controls the break-make of all described battery cell series circuits simultaneously.
Further, multiple described battery cell on-off switch in parallel is integrated into a total lock of break-make in parallel, the break-make between the negative pole bus in parallel with described negative pole simultaneously controlling the positive pole bus in parallel with described positive pole of all described battery cells, all described battery cells.
The circuit of battery pack balancing that the utility model provides can isolate battery cell larger for voltage differences in battery pack from battery pack series circuit, and these battery cells are connected in parallel, realize the harmless transfer of energy between difference battery cell, reach the object of battery cell electric voltage equalization in whole battery pack.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the equalizing circuit of the battery pack of embodiment 1;
Fig. 2 is the circuit diagram of the equalizing circuit of the battery pack of embodiment 2;
Fig. 3 is the circuit diagram of the equalizing circuit of the battery pack of embodiment 3;
Wherein, description of reference numerals is as follows:
10 battery pack 101 battery cells 20 are connected the total lock of break-make
The total lock of 21 battery cell series connection on-off switch 22 battery cell series relay 30 break-make in parallel
31 battery cells on-off switch 32 battery cell in parallel relay 41 positive pole in parallel bus in parallel
42 negative poles bus 50 battery management system 51 in parallel battery cell voltage detection module
52 series relay control module 53 relay control module in parallel
Embodiment
Embodiment 1
As shown in Figure 1, the embodiment of a circuit of battery pack balancing is given.
In this example, circuit of battery pack balancing comprises positive pole bus 41 in parallel, negative pole bus 42 in parallel, multiple battery cell series connection on-off switch 21 and multiple battery cell on-off switch 31 in parallel.Battery cell series connection on-off switch 21 is arranged between two adjacent battery cells 101 of series connection, and battery cell on-off switch 31 in parallel is arranged between the negative pole bus 42 in parallel with negative pole of the positive pole bus 41 in parallel with positive pole of each battery cell 101, each battery cell 101.Battery cell series connection on-off switch 21 can be communicated with the tandem link of battery pack 10 when needing battery pack 10 to work, and the voltage of battery cell 101 is unbalanced and when needing balanced in battery pack 10, disconnect the connection of battery cell 101 and the tandem link of battery pack 10.Battery cell on-off switch 31 in parallel can disconnect the connection between the negative pole bus 42 in parallel with negative pole of the positive pole bus 41 in parallel with positive pole of battery cell 101, battery cell 101 when needing battery pack 10 to work, thus disconnect being connected in parallel between battery cell 101, and battery cell 101 voltage is unbalanced and when needing balanced, be connected in parallel needing balanced battery cell 101 in battery pack 10.
The circuit of battery pack balancing that this example provides can isolate battery cell larger for voltage differences in battery pack from battery pack series circuit, and these battery cells are connected in parallel, realize the harmless transfer of energy between difference battery cell, reach the object of battery cell electric voltage equalization in whole battery pack.
Embodiment 2
As shown in Figure 2, the embodiment of another circuit of battery pack balancing is given.
This example is distinguished as with embodiment 1, and all battery cell series connection on-off switches are integrated into a total lock 20 of series connection break-make, and all battery cells on-off switch in parallel is integrated into a total lock 30 of break-make in parallel.Series connection break-make total lock 20 can be communicated with the series circuit of battery pack 10 when needing battery pack 10 to work, in battery pack 10, the voltage of battery cell 101 is unbalanced and when needing balanced, disconnect the connection of battery cell 101 and battery pack 10 tandem link.The total lock 30 of break-make in parallel can disconnect being connected in parallel of battery cell 101 when needing battery pack 10 to work, and in battery pack 10, the voltage of battery cell 101 is unbalanced and when needing equilibrium, be connected in parallel by battery cells 101 all in battery pack 10.
Each battery cell in battery pack can be connected in parallel by battery pack equilibrium method that this example provides quickly and easily, realizes the harmless transfer of energy between difference battery cell, reaches the object of battery cell electric voltage equalization in whole battery pack.
Embodiment 3
As shown in Figure 3, the embodiment of another circuit of battery pack balancing is given.
This example is distinguished as with embodiment 1, and battery cell series connection on-off switch is set to battery cell series relay 22, and battery cell on-off switch in parallel is set to battery cell relay 32 in parallel, and is controlled by battery management system 50.Battery management system 50 comprises battery cell voltage detection module 51, series relay control module 52 and relay control module in parallel 53.Whether battery cell voltage detection module 51 detects the terminal voltage of each battery cell 101 in battery pack 10, balanced according to each battery cell 101 in prefabricated parameter decision battery pack 10 by battery management system 50, and which battery cell 101 needs equilibrium.If it is determined that some battery cell 101 of battery pack 10 needs equilibrium, then control battery cell series relay 22 by series relay control module 52 and isolate needing balanced battery cell 101 from the series circuit of battery pack 10.Then, to the positive pole of balanced battery cell 101 and positive pole bus 41 in parallel be needed, need the negative pole of balanced battery cell 101 and negative pole bus 42 in parallel to be connected, thus will balanced battery cell 101 be needed to be connected in parallel, realize the harmless transfer of energy of these battery cells 101.
The circuit of battery pack balancing that this example provides can isolate battery cell larger for voltage differences in battery pack from battery pack series circuit, and these battery cells are connected in parallel, realize the harmless transfer of energy between difference battery cell, reach the object of battery cell electric voltage equalization in whole battery pack.

Claims (5)

1. a circuit of battery pack balancing, comprise the battery pack be composed in series by multiple battery cell, it is characterized in that, also comprise battery management system, positive pole bus in parallel, negative pole bus in parallel, multiple battery cell series connection on-off switch and multiple battery cell on-off switch in parallel; Described battery cell series connection on-off switch is arranged between two adjacent described battery cells of series connection, and described battery cell on-off switch in parallel is arranged between the negative pole bus in parallel with described negative pole of the positive pole bus in parallel with described positive pole of each described battery cell, each described battery cell.
2. circuit of battery pack balancing according to claim 1, it is characterized in that, described battery cell series connection on-off switch is battery cell series relay, and described battery management system completes the break-make of each described battery cell series circuit by controlling described battery cell series relay.
3. circuit of battery pack balancing according to claim 1, it is characterized in that, described battery cell on-off switch in parallel is battery cell relay in parallel, and described battery management system completes the break-make of negative pole bus in parallel with described negative pole of the positive pole bus in parallel with described positive pole of each described battery cell, each described battery cell by controlling described battery cell relay in parallel.
4. circuit of battery pack balancing according to claim 1, is characterized in that, multiple described battery cell series connection on-off switch is integrated into a total lock of series connection break-make, and the total lock of described series connection break-make controls the break-make of all described battery cell series circuits simultaneously.
5. circuit of battery pack balancing according to claim 1, it is characterized in that, multiple described battery cell on-off switch in parallel is integrated into a total lock of break-make in parallel, the break-make between the negative pole bus in parallel with described negative pole simultaneously controlling the positive pole bus in parallel with described positive pole of all described battery cells, all described battery cells.
CN201520868052.0U 2015-11-03 2015-11-03 Equalization circuit for battery pack Active CN205160118U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520868052.0U CN205160118U (en) 2015-11-03 2015-11-03 Equalization circuit for battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520868052.0U CN205160118U (en) 2015-11-03 2015-11-03 Equalization circuit for battery pack

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CN205160118U true CN205160118U (en) 2016-04-13

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106058986A (en) * 2016-07-04 2016-10-26 武汉理工大学 Automotive battery equalization circuit based on lithium iron phosphate
CN107171387A (en) * 2017-06-07 2017-09-15 国网山东省电力公司 It is a kind of can dynamic restructuring battery energy storage system and method
CN107856557A (en) * 2017-10-17 2018-03-30 北京普莱德新能源电池科技有限公司 A kind of electrokinetic cell system and electric car with equalization function
CN107863469A (en) * 2017-10-17 2018-03-30 北京普莱德新能源电池科技有限公司 A kind of electrokinetic cell equilibrium converting system and battery bag

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106058986A (en) * 2016-07-04 2016-10-26 武汉理工大学 Automotive battery equalization circuit based on lithium iron phosphate
CN107171387A (en) * 2017-06-07 2017-09-15 国网山东省电力公司 It is a kind of can dynamic restructuring battery energy storage system and method
CN107856557A (en) * 2017-10-17 2018-03-30 北京普莱德新能源电池科技有限公司 A kind of electrokinetic cell system and electric car with equalization function
CN107863469A (en) * 2017-10-17 2018-03-30 北京普莱德新能源电池科技有限公司 A kind of electrokinetic cell equilibrium converting system and battery bag
CN107856557B (en) * 2017-10-17 2020-04-14 北京普莱德新能源电池科技有限公司 Power battery system with balancing function and electric vehicle

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