CN112531810B - Equalizing device and energy storage system comprising same - Google Patents
Equalizing device and energy storage system comprising same Download PDFInfo
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- CN112531810B CN112531810B CN202011265810.1A CN202011265810A CN112531810B CN 112531810 B CN112531810 B CN 112531810B CN 202011265810 A CN202011265810 A CN 202011265810A CN 112531810 B CN112531810 B CN 112531810B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to an equalizing device and an energy storage system comprising the equalizing device, wherein the equalizing device comprises a controller, a power supply conversion module, a current control module and a switch array which are sequentially connected, the input end of the power supply conversion module is connected to an equalizing power supply, the switch array is connected to a battery pack, and the current control module controls the current between the power supply conversion module and the switch array; the switch array comprises a plurality of first relays, and each first relay is connected with each battery string of the plurality of battery packs in a one-to-one correspondence mode. Compared with the prior art, the invention can realize that the number of the battery strings supported by one power supply conversion module is obviously increased, not only can the cost be obviously reduced in a large-scale energy storage system, but also a certain battery string in a certain battery pack can be accurately and accurately balanced.
Description
Technical Field
The invention relates to a balancing technology applied to a large energy storage system, in particular to a balancing device and an energy storage system comprising the same.
Background
In an energy storage system, in order to maintain consistency of each battery string and each pack, a balancing module needs to be configured, and the balancing module needs to include a DC-DC module and a switch array, as shown in fig. 1, in the prior art, one battery pack 1 includes a plurality of battery strings 11 connected in series, the battery strings 11 are obtained by connecting an indefinite number of single batteries in parallel, each battery string 11 has a corresponding switch, and the battery pack 1 is connected to the DC-DC module through a switch array 3, generally, in the prior art, one battery pack 1 corresponds to 1 DC-DC module, or a plurality of (the number is limited, generally 1 to 2) battery packs 1 correspond to 1 DC-DC module, but in any way, the number of the battery packs 1 corresponding to a single DC-DC module is very limited.
In a large energy storage system, due to the large number of battery packs, a large number of DC-DC modules need to be configured, and the increase of the number of the DC-DC modules is high in cost firstly, and also poses a great challenge to the reliability of the large energy storage system secondly, and the probability of damage of a plurality of DC-DC modules is high.
Disclosure of Invention
The invention aims to provide a balancing device and an energy storage system comprising the same, wherein a switch array adopts a relay mode, so that the voltage-resistant grade can be improved, a power supply conversion module can control a plurality of battery packs or correspond to more battery strings, the cost can be obviously reduced in a large-scale energy storage system, and a certain battery string in a certain battery pack can be accurately and precisely balanced.
The purpose of the invention can be realized by the following technical scheme:
an equalizing apparatus, comprising:
the battery pack comprises a power supply conversion module and a switch array, wherein one end of the power supply conversion module is connected to a balanced power supply, the other end of the power supply conversion module is connected to the switch array, and the switch array is connected to the battery pack;
the device also comprises a current control module arranged between the power supply conversion module and the switch array, wherein the current control module controls the current between the power supply conversion module and the switch array;
the switch array comprises a plurality of first relays, and each first relay is connected with each battery string of the plurality of battery packs in a one-to-one correspondence manner;
the device also comprises a controller, wherein the controller is respectively connected with the current control module and each first relay and is configured to control the on-off of each first relay and the current control module.
Furthermore, in order to reduce the requirement on the voltage resistance of the relays and thus improve the service life of the equalizing device, the switch array further comprises two second relays, the two second relays are both connected with the controller, a common end of one of the second relays is connected to the positive electrode of the output end of the current control module, one of the normally open end and the normally closed end is connected to one part of all the first relays, and the other one of the normally open end and the normally closed end is connected to the other part of all the first relays; the common terminal of the other second relay is connected to the negative terminal of the output terminal of the current control module, one of the normally open terminal and the normally closed terminal is connected to one part of all the first relays, and the other is connected to the other part of all the first relays. Therefore, the controller can separately control the switching states of the two second relays.
Or, further, in the two second relays, the normally-open end of one second relay is connected to the normally-closed end of the other relay, the normally-closed end is connected to the normally-open end of the other second relay, and the common end of the other second relay is connected to the negative electrode of the output end of the current control module.
In order to further reduce the cost, the first relay is an alternating current relay.
Further, a part of all the first relays and another part of all the first relays are staggered.
Still further, the balance power supply is an alternating current power supply, and the power supply conversion module is an AC-DC module.
Further, the current control module includes charge control switch and discharge control switch, charge control switch establishes ties between power conversion module and switch array, discharge control switch connects in parallel between power conversion module and switch array, and discharge control switch set up in between charge control switch and the switch array, charge control switch and discharge control switch all are connected to the controller. The device also comprises a charge-discharge switching module, wherein the charge-discharge switching module is connected in series between the current control module and the switch array and is connected to the controller.
Another aspect of the present invention is directed to providing the electrical lifetime of a relay in such an application scenario, in particular by:
the controller is configured to perform the steps of: when the state of any first relay needs to be switched, the current control module is controlled to be switched off; and controlling the corresponding first relay to switch at a first set time interval after the current control module is switched off.
Further, when a switch array of two-stage relays is employed, the controller is configured to perform the steps of: when the state of any one of the first relay and the second relay needs to be switched, the current control module is controlled to be switched off; and after the current control module is switched off, controlling the corresponding second relay to switch at a first set time interval, and then controlling the corresponding first relay to switch.
An energy storage system comprises a balancing device and a plurality of battery packs, wherein the balancing device adopts any one of the balancing devices.
Compared with the prior art, the invention has the following beneficial effects:
1) the switch array adopts the mode of the relay, can improve withstand voltage level to can realize that a power conversion module controls a plurality of battery packages, perhaps correspond the quantity of battery cluster and can show the increase, reach the voltage level more than 100V at least, solve and draw the arc problem, not only can show reduce cost in large-scale energy storage system, and can accurately carry out accurate equilibrium to a certain battery cluster in a certain battery package.
2) Through the switch array structure that sets up the two-stage relay, can reduce the requirement to the withstand voltage performance of relay to improve balancing unit's life.
3) The two second relays are linked, so that the charging and discharging switching control of the second relays can be realized by only occupying one control line and one control signal.
4) A part of the first relays and another part of the first relays are staggered, so that the number of relays can be reduced, and a switching channel control strategy is simple.
5) The design of the charging control switch and the discharging control switch of the current control module is matched, so that the control of the main circuit can be conveniently realized.
6) The charging and discharging switching module is independent of the current control module and can be separately and independently controlled, so that the 0 current control during the switching of the charging and discharging switching module is realized.
7) The balance power supply is an alternating current power supply, the power supply conversion module is an AC-DC module, the higher voltage level of the energy storage system is realized, the practical value is higher, and the cost can be reduced.
8) The delay action is set to realize zero arc switching, so that when the alternating current relay is applied, the electrical switching service life of the relay is equal to the mechanical service life.
Drawings
FIG. 1 is a schematic diagram of an implementation architecture of an equalization module in the prior art;
FIG. 2 is a schematic diagram of an implementation architecture of the present invention;
FIG. 3 is a schematic diagram of another implementation architecture according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a switch array in an embodiment of the invention;
FIG. 5 is a schematic diagram of a current control module according to an embodiment of the invention;
FIG. 6 is a schematic diagram of another current control module in an embodiment
Reference numerals: 1. the device comprises a battery pack, 2, a power supply conversion module, 3, a switch array, 4, a current control module, 5, a charge-discharge switching module, 11 and a battery string.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
An equalizing device, as shown in fig. 2 and 4, includes a controller, and a power conversion module 2, a current control module 4 and a switch array 3 connected in sequence, wherein an input end of the power conversion module 2 is connected to an equalizing power supply, the switch array 3 is connected to a battery pack 1, and the current control module 4 controls a current between the power conversion module 2 and the switch array 3; the switch array 3 includes a plurality of first relays, and the normally open ends of the first relays are respectively connected to the battery strings 11 of the battery packs 1 in a one-to-one correspondence manner. Of course, in other embodiments, the first relay may also be connected to the loop by using a normally closed terminal. Alternatively, as shown in fig. 3, in another embodiment, the battery pack 1 may be one, and the controller may be connected to the current control module 4 and each of the first relays, and configured to control on/off of each of the first relays and the current control module 4.
The main characteristics of this application lie in that the voltage grade of battery package 1 that supports or battery package 1 group is showing and is improving, and switch array 3 adopts the mode of relay, can improve withstand voltage grade to can realize that a power conversion module 2 controls a plurality of battery package 1, perhaps the quantity that corresponds battery cluster 11 can show and increase, reach the voltage grade more than 100V at least, not only can show reduce cost in large-scale energy storage system, and can accurately carry out accurate equilibrium to a certain battery cluster 11 in a certain battery package 1.
In fig. 4, S3 and S6 are second relays, and S1, S2, S4, S5, and S7 to S11 are first relays.
In other embodiments, the switch array 3 may adopt a two-stage relay architecture, which may reduce the requirement on the voltage resistance of the relays, thereby improving the service life of the balancing apparatus, specifically, the switch array 3 further includes two second relays, both of which are connected to the controller, a common terminal of one of the second relays is connected to the positive electrode of the output terminal of the current control module 4, one of the normally open terminal and the normally closed terminal is connected to a common terminal of one of all the first relays, and the other is connected to a common terminal of the other of all the first relays; the common terminal of the other second relay is connected to the negative terminal of the output terminal of the current control module 4, one of the normally open terminal and the normally closed terminal is connected to one part of all the first relays, and the other is connected to all the common terminals of the other part of all the first relays. Therefore, the controller can separately control the switching states of the two second relays. It should be understood by those skilled in the art that the directions of the normally open/normally closed end and the common end of the first relay may be reversed.
In another embodiment, the normally open end of one of the two second relays is connected to the normally closed end of the other relay, the normally closed end is connected to the normally open end of the other second relay, and the common end of the other second relay is connected to the negative pole of the output end of the current control module 4.
In another embodiment, a portion of the first relays and another portion of the first relays are staggered.
In one embodiment, the first relay and the second relay are both ac relays for cost reduction.
The device also comprises a charge-discharge switching module 5, wherein the charge-discharge switching module 5 is connected in series between the current control module 4 and the switch array 3 and is connected to the controller; the current control module 4 comprises a charging control switch and a discharging control switch, the charging control switch is connected in series between the power supply transformation module 2 and the switch array 3, the discharging control switch is connected in parallel between the power supply transformation module 2 and the switch array 3, the charging control switch, the discharging control switch and the charging and discharging switching module 5 are sequentially arranged, and the charging control switch and the discharging control switch are both connected to the controller. As shown in fig. 2 and fig. 3, the charging and discharging switching module 5 includes a charging branch, a discharging branch and a switch, a common end of the switch is connected to the trunk, one of the common end and the normally open end is connected to one end of the charging branch, the other is connected to one end of the discharging branch, and the other ends of the charging branch and the discharging branch are connected to the trunk. The discharging branch is provided with a discharging resistor R1, which is switched to the charging mode when the charging branch is turned on by the switch, and is switched to the discharging mode when the discharging branch is turned on by the switch.
When the controller switches the state of the relay: when the state of any first relay needs to be switched, the current control module 4 is controlled to be switched off; and controlling the corresponding first relay to switch at a first set time interval after the current control module 4 is switched off. The first set time interval should preferably be longer than 1 second, but longer than 1 second is also possible, and in other embodiments, 0.5 second or2 seconds, etc. may be selected, and it is only necessary to ensure that the current can be reduced to 0.
In the embodiment that the switch array 3 is a two-stage relay architecture, when the state of any one of the first relay and the second relay needs to be switched, the current control module 4 is controlled to be turned off; after the current control module 4 is switched off, a first set time interval is set, and then the corresponding second relay is controlled to be switched first, and then the corresponding first relay is controlled to be switched.
In one embodiment, as shown in fig. 5, the charge control switch includes a MOS transistor M2, a DC chip DC2, and an optical coupler OR1, and the discharge control switch includes a MOS transistor M1, a DC chip DC1, and an optical coupler OR2, where the control signal 1 and the control signal 2 are both from the controller, when the controller signal 1 is at a high level, the optical coupler OR1 is turned on, the MOS transistor M2 is turned on, so that the circuit from the power conversion module 2 to the switch array 3 is turned on, when the control signal 1 is at a low level, conversely, the MOS transistor M2 is turned on and off, when the control signal 2 is at a high level, the optical coupler OR2 is turned on, the MOS transistor M1 is turned on, and vice versa; the MOS transistor M2 may be connected in series to the positive line or the negative line.
When the charging and discharging switching module 5 is switched to the charging mode, when the control signal 1 is at a high level and the control signal 2 is at a low level, the MOS transistor M2 is turned on, and the MOS transistor M1 is turned off, at this time, charging can be performed, otherwise, when the charging and discharging switching module 5 is switched to the discharging mode, the control signal 1 is at a low level and the control signal 2 is at a high level, discharging can be started.
In another embodiment, as shown in fig. 6, the charge control switch includes a MOS transistor M2, the discharge control switch includes a MOS transistor M1, the current control module 4 may further include some filtering elements or voltage stabilizing elements, and the MOS transistor M1 and the MOS transistor M2 regulate the control current through PWM, so as to achieve a similar effect of current control. Similarly, the MOS transistor M2 may also be connected in series to the negative line.
In another embodiment, the charging and discharging switching module 5 may not be provided, and the discharging resistor R1 is connected in series in the MOS transistor M1.
In this embodiment, the equalizing power supply is an AC power supply, and the power conversion module 2 is an AC-DC module, but in other embodiments, a DC-DC module may be used, which is determined according to the type of the equalizing power supply.
The above-described equalizing device can be applied to a large energy storage system, such as a container type energy storage system.
Claims (3)
1. An equalizing apparatus, comprising:
the battery pack comprises a power supply conversion module and a switch array, wherein one end of the power supply conversion module is connected to a balanced power supply, the other end of the power supply conversion module is connected to the switch array, and the switch array is connected to the battery pack;
it is characterized in that the preparation method is characterized in that,
the device also comprises a current control module arranged between the power supply conversion module and the switch array, wherein the current control module controls the current between the power supply conversion module and the switch array;
the switch array comprises a plurality of first relays, and each first relay is connected with each battery string of one or more battery packs in a one-to-one corresponding mode;
the device also comprises a controller, wherein the controller is respectively connected with the current control module and each first relay and is configured to control the on-off of each first relay and the current control module;
the switch array further comprises two second relays, the two second relays are connected with the controller, the common end of one second relay is connected to the positive electrode of the output end of the current control module, one of the normally-open end and the normally-closed end is connected to one part of all the first relays, and the other one of the normally-open end and the normally-closed end is connected to the other part of all the first relays; the common terminal of the other second relay is connected to the negative pole of the output terminal of the current control module, one of the normally-open terminal and the normally-closed terminal is connected to one part of all the first relays, and the other one of the normally-open terminal and the normally-closed terminal is connected to the other part of all the first relays;
the normally-open end of one second relay is connected to the normally-closed end of the other second relay, and the normally-closed end of the other second relay is connected to the normally-open end of the other second relay;
a part of all the first relays and the other part of all the first relays are arranged in a staggered mode;
the relays in the switch array are alternating current relays;
the current control module comprises a charging control switch and a discharging control switch, the charging control switch is connected between the power supply conversion module and the switch array in series, the discharging control switch is connected between the power supply conversion module and the switch array in parallel, the discharging control switch is arranged between the charging control switch and the switch array, the charging control switch and the discharging control switch are both connected to the controller, the charging control switch comprises a MOS (metal oxide semiconductor) tube M2 and an optical coupler OR1, the discharging control switch comprises a MOS tube M1 and an optical coupler OR2, and the input ends of the optical coupler OR1 and the optical coupler OR2 are connected to the output end of the controller and respectively connected to a MOS tube M1 and a MOS tube M2;
the device also comprises a charge-discharge switching module, wherein the charge-discharge switching module is connected in series between the current control module and the switch array and is connected to the controller, the charge-discharge switching module comprises a charge branch, a discharge branch and a switch, the common end of the switch is connected to the switch array, one of the normally closed end and the normally open end is connected to one end of the charge branch, the other one of the normally closed end and the normally open end is connected to one end of the discharge branch, the other ends of the charge branch and the discharge branch are both connected to the charge control switch and the discharge control switch, a discharge resistor R1 is arranged on the discharge branch, when the charge branch is conducted by the switch, the charge branch is switched to the charge mode, and when the discharge branch is conducted by the switch, the discharge branch is switched to the discharge mode;
the controller is configured to perform the steps of: when the state of any one of the first relay and the second relay needs to be switched, the current control module is controlled to be switched off; and after the current control module is switched off, controlling the corresponding second relay to switch at a first set time interval, and then controlling the corresponding first relay to switch.
2. The equalizing device of claim 1, wherein the equalizing power supply is an AC power supply and the power conversion module is an AC-DC module.
3. An energy storage system comprising a plurality of battery packs and an equalizing device, wherein the equalizing device is the equalizing device according to claim 1 or 2.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265810.1A CN112531810B (en) | 2020-11-13 | 2020-11-13 | Equalizing device and energy storage system comprising same |
| PCT/CN2021/076776 WO2022099945A1 (en) | 2020-11-13 | 2021-02-19 | Equalization device and energy storage system containing the equalization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265810.1A CN112531810B (en) | 2020-11-13 | 2020-11-13 | Equalizing device and energy storage system comprising same |
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| Publication Number | Publication Date |
|---|---|
| CN112531810A CN112531810A (en) | 2021-03-19 |
| CN112531810B true CN112531810B (en) | 2022-04-08 |
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| CN202011265810.1A Active CN112531810B (en) | 2020-11-13 | 2020-11-13 | Equalizing device and energy storage system comprising same |
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| CN (1) | CN112531810B (en) |
| WO (1) | WO2022099945A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101076786B1 (en) * | 2009-01-30 | 2011-10-25 | 한국과학기술원 | Charge Equalization Apparatus for Series-Connected Battery String and Charge Equalization Method Thereof |
| CN102810895B (en) * | 2012-08-28 | 2014-09-10 | 哈尔滨工业大学 | Circuit and method for balancing electric quantity of storage battery pack |
| FR2997577B1 (en) * | 2012-10-25 | 2015-12-04 | IFP Energies Nouvelles | BALANCING CONVERTER FOR BATTERIES COMPRISING DIAGNOSTIC MEANS |
| CN105429212A (en) * | 2015-12-01 | 2016-03-23 | 深圳奥特迅电力设备股份有限公司 | Battery pack voltage equalization control circuit and battery management equipment |
| CN105449296A (en) * | 2015-12-30 | 2016-03-30 | 苏州科纽普新能源科技有限公司 | Nondestructive equilibrium management system of modular high-power battery pack |
| CN106532846A (en) * | 2016-12-13 | 2017-03-22 | 高玮 | Battery equalization system |
| CN107650730A (en) * | 2017-10-30 | 2018-02-02 | 科大智能（合肥）科技有限公司 | A kind of direct-current charging post multiple gun power distribution system |
| KR102633040B1 (en) * | 2018-08-23 | 2024-02-01 | 주식회사 엘지에너지솔루션 | Apparatus for managing battery |
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2020
- 2020-11-13 CN CN202011265810.1A patent/CN112531810B/en active Active
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- 2021-02-19 WO PCT/CN2021/076776 patent/WO2022099945A1/en active Application Filing
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| WO2022099945A1 (en) | 2022-05-19 |
| CN112531810A (en) | 2021-03-19 |
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