CN116315921A - Active equalization battery module integrated busbar - Google Patents
Active equalization battery module integrated busbar Download PDFInfo
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- CN116315921A CN116315921A CN202111565319.5A CN202111565319A CN116315921A CN 116315921 A CN116315921 A CN 116315921A CN 202111565319 A CN202111565319 A CN 202111565319A CN 116315921 A CN116315921 A CN 116315921A
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- equalization
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
- H01R25/16—Rails or bus-bars provided with a plurality of discrete connecting locations for counterparts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/68—Structural association with built-in electrical component with built-in fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
- H01R25/16—Rails or bus-bars provided with a plurality of discrete connecting locations for counterparts
- H01R25/161—Details
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- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses an active equalization module integrated busbar, which relates to the technical field of battery charging and discharging and comprises the following components: the device comprises a busbar, a nickel plating copper strip, a sampling plate, an equalization control plate and a structure fixing piece; the sampling plate is connected with the balance control plate through the balance control interface; the busbar is connected with the sampling plate through a nickel plating copper strip; the busbar and the sampling plate are mounted on the fixing piece. According to the invention, part of circuits in the active equalization module are integrated into the integrated bus bar, and the equalization loop with large current is separated from the sampling loop with small current, so that the line length of the equalization loop is reduced, the equalization path is shortened, and the equalization efficiency and the assembly efficiency are improved; the sampling plate and the equalization control plate can be designed in a detachable mode, the equalization control plate can be not installed in a new battery stage, the passive equalization battery management system is directly connected, when the consistency of the battery is poor, active equalization can be carried out through driving power supply and a communication interface by additionally installing the equalization control plate, and gradient utilization of the battery is achieved.
Description
Technical Field
The invention relates to the technical field of battery charging and discharging, in particular to an active equalization battery module integrated busbar.
Background
When the lithium battery is used, in order to meet application requirements, the battery pack is usually required to be assembled in series and parallel, and due to aging difference caused by consistency problems in the manufacturing process of the battery and environmental difference of the battery, after the lithium battery is used for a period of time, the consistency of the lithium battery is usually poor, and endurance attenuation is caused.
To address this problem, it is currently common practice to use passive equalization. The passive equalization is to connect a bypass power resistor in parallel on each battery, when the voltage of one battery in the battery pack is higher, the redundant energy is consumed through the power resistor by closing a switch of a bypass loop, so that the consistency of the single batteries in the battery pack is ensured, in the practical application process, as the power resistor is integrated on the board card and is limited by the heating power of the board card and the rated power of the power resistor, the equalization current of the common technology is only 0.3A at most, and for high-capacity lithium ion batteries, especially for lithium iron phosphate batteries with relatively flat charging platform curves, the practical effect is not ideal; another equalization technique is an active equalization technique, which transfers the energy of a battery with high battery capacity to a battery with low battery capacity in an energy transfer manner, so as to ensure the battery consistency of the battery pack, wherein the transfer manner can be battery, inductance, capacitor energy storage or bidirectional power converter.
The current mainstream technical scheme is that an equalization circuit is arranged on a battery management system, so that the equalization circuit is limited by a sampling wire harness and a connector, the equalization of large current is difficult to realize, and the active equalization current of the current mainstream in the market is within 2A.
Therefore, an active equalization battery module integrated busbar is provided, which solves the problems existing in the prior art and is a problem to be solved by the technicians in the field.
Disclosure of Invention
In view of this, the invention provides an active equalization battery module integrated busbar, which reduces the path of an equalization loop, increases the equalization current and improves the assembly efficiency.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an active equalization module integrated busbar comprising: the device comprises a busbar, a nickel plating copper strip, a sampling plate, an equalization control plate and a structure fixing piece;
the sampling plate is provided with an equalization control interface, and the sampling plate is connected with the equalization control plate through the equalization control interface; the busbar is connected with the sampling plate through the nickel plating copper strip; the busbar and the sampling plate are mounted on the fixing piece.
Optionally, the sampling plate further includes: the temperature sensor comprises a controllable switch matrix, a temperature sensor, a fuse, a voltage temperature sampling interface, an external temperature interface, a first equalization interface and a second equalization interface;
the controllable switch matrix and the voltage temperature sampling interface are connected with the fuse;
the temperature sensor and the external temperature interface are connected with the voltage temperature sampling interface; the voltage temperature sampling interface is externally connected with a battery management system;
the first equalization interface and the second equalization interface are respectively connected with two adjacent modules.
Optionally, the controllable switch matrix is composed of any one of a MOSFET field effect transistor, a solid state relay, an optocoupler relay, an IGBT and GaN.
Optionally, the rated current of the fuse is 5-20A.
Optionally, the equalization control board includes: the device comprises a microprocessor, a switch driving unit, a voltage stabilizing unit, a power supply isolation unit, a communication isolation unit, a transceiver unit and a driving voltage state monitoring unit;
the switch driving unit is connected with the input end of the control switch matrix and used for controlling the on/off of the control switch matrix;
the voltage stabilizing unit is connected with the voltage input end of the microprocessor and is used for stabilizing voltage and outputting rated voltage to supply power to the microprocessor after power is taken from the balance control interface;
the microprocessor is connected with the input end of the switch driving unit and used for controlling the working state of the switch driving unit;
the driving state voltage detection unit is connected with the output end of the switch driving unit and is used for detecting the working state of the switch driving unit;
the driving state voltage detection unit is connected with the input end of the microprocessor and used for inputting the detected working state of the switch driving unit into the microprocessor.
Optionally, the equalization control board is disposed on the sampling board and is detachably connected.
Optionally, the busbar and the nickel-plated copper strip are connected by ultrasonic welding, laser welding or resistance welding.
Optionally, the driving state voltage detection unit monitors a driving voltage of the switch driving unit; the anodes of all batteries in the module are connected to the anodes of the equalization interfaces (the first equalization interface or the second equalization interface) through controllable switches in the controllable switch matrix, and the cathodes are connected to the cathodes of the corresponding equalization interfaces (the first equalization interface or the second equalization interface) through controllable switches of the controllable switch matrix.
Optionally, the voltage temperature sampling interface, the first equalization interface, the second equalization interface, the external temperature interface, and the power supply communication interface of the switch driving unit are a pair of connectors that are male and female, and based on space consideration, part of the interfaces may be combined into a pair of connectors that are male and female;
optionally, the external temperature interface supports 1-2 paths of external temperature expansion acquisition.
Compared with the prior art, the invention provides the active equalization battery module integrated busbar which is characterized in that the active equalization battery module integrated busbar comprises a main bus and a secondary bus, wherein the main bus is connected with the main bus through the main bus, and the secondary bus is connected with the main bus through the auxiliary bus. Part of circuits in the active equalization module are integrated into an integrated bus, and an equalization loop with large current is separated from a sampling loop with small current, so that the line length of the equalization loop is reduced, the equalization path is shortened, and the equalization efficiency and the assembly efficiency are greatly improved in practical application; the sampling plate and the equalization control plate can be designed in a detachable mode, the equalization control plate can be not installed in a new battery stage, a passive equalization battery management system can be connected, when the battery operation is carried out for many years, the equalization control plate can be additionally installed when the consistency of the battery is poor, active equalization can be carried out through driving power supply and a communication interface, and gradient utilization of the battery is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is an exploded view of an active equalization battery module integrated busbar according to the present invention;
FIG. 2 is a schematic view of an integrated busbar structure with structural fasteners removed according to the present invention;
FIG. 3 is a schematic diagram of the structure of the equalization control board of the present invention;
FIG. 4 is a block diagram of the electrical schematic of the integrated busbar of the present invention;
FIG. 5 is a system block diagram of a multi-module application of the present invention;
the device comprises a 1-busbar, a 2-nickel-plated copper strip, a 3-sampling plate, a 301-controllable switch matrix, a 302-temperature sensor, a 303-fuse, a 304-voltage temperature sampling interface, a 305-first equalization interface, a 306-external temperature interface, a 307-equalization control interface, a 308-second equalization interface, a 4-equalization control board, a 401-microprocessor, a 402-switch driving unit, a 403-voltage stabilizing unit, a 404-power supply isolation unit, a 405-communication isolation unit, a 406-receiving and transmitting unit, a 407-driving voltage state monitoring unit and a 5-structure fixing piece.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the invention discloses an active equalization battery module integrated busbar, comprising: the device comprises a busbar 1, a nickel plating copper strip 2, a sampling plate 3, an equalization control plate 4 and a structure fixing piece 5;
wherein, the sampling plate 3 is provided with an equalization control interface, and the sampling plate 3 is connected with the equalization control board 4 through the equalization control interface 307; the busbar 1 and the sampling plate 3 are connected through a nickel plating copper strip 2; the busbar 1 and the sampling plate 3 are mounted on a mount 5.
Further, the equalization control board 4 is disposed on the sampling board 3 and is detachably connected.
Further, the busbar 1 and the nickel-plated copper strip 2 are connected by adopting ultrasonic welding, laser welding or resistance welding.
In a specific embodiment, referring to fig. 2, the sampling plate 3 further comprises: a controllable switch matrix 301, a temperature sensor 302, a fuse 303, a voltage temperature sampling interface 304, an external temperature interface 306, a first equalization interface 305, and a second equalization interface 308;
the controllable switch matrix 301 and the voltage temperature sampling interface 304 are connected with the fuse 303;
the temperature sensor 302 and the external temperature interface 306 are both connected with the voltage temperature sampling interface 304; the voltage temperature sampling interface 304 is externally connected with a battery management system;
the first equalization interface 305 and the second equalization interface 308 are respectively connected to two adjacent modules.
Further, the controllable switch matrix 301 is composed of any one of MOSFET field effect transistors, solid state relays, optocoupler relays, IGBTs, and GaN.
Further, the rated current of the fuse 303 is 5 to 20A.
Furthermore, the sampling board 3 is a 2-layer FR4 board, the thickness of the copper sheet is at least 2oz, the controllable switch matrix 301 can be realized by adopting a plurality of pairs of N-MOSFET field effect transistors, and N-MOSFETs with high voltage resistance and low on resistance are preferred to reduce the resistance of the whole equalization loop and prevent avalanche breakdown; the temperature sensor 302 may be an NTC temperature sensor; the fuse 303 is selected from rated current 10A; the first equalization interface 305 and the second equalization interface 308 both use high-current connectors as equalization interfaces, and the continuous overcurrent capacity is more than or equal to 10A; the external temperature interface 306 is used to connect an external temperature, such as a heating film temperature sensor. The external temperature sampling signal and the battery module voltage temperature sampling signal are finally connected to the voltage temperature sampling interface 304 of the acquisition board to be led out, and can be externally connected with a battery management system.
In one particular embodiment, referring to fig. 3, the equalization control board 4 includes: a microprocessor 401, a switch driving unit 402, a voltage stabilizing unit 403, a power supply isolation unit 404, a communication isolation unit 405, a transceiver unit 406 and a driving voltage state monitoring unit 407;
a switch driving unit 402 connected to an input terminal of the control switch matrix 301 for controlling on/off of the control switch matrix 301;
the voltage stabilizing unit 403 is connected with a voltage input end of the microprocessor 401, and is used for stabilizing voltage and outputting rated voltage to supply power to the microprocessor 401 after power is taken from the equalization control interface 307;
the microprocessor 401 is connected with the input end of the switch driving unit 402 and is used for controlling the working state of the switch driving unit 402;
a driving state voltage detection unit 407 connected to the output end of the switch driving unit 402, for detecting the working state of the switch driving unit 402;
the driving state voltage detection unit 407 is connected to an input terminal of the microprocessor 401, and is configured to input the detected operation state of the switch driving unit 402 into the microprocessor 401.
Further, the equalization control board 4 adopts 4 layers, wherein the microprocessor 401 is a microprocessor with one path of CAN communication; the switch driving unit 402 is a driving circuit formed by an optocoupler relay array; the voltage stabilizing unit 403 is a DCDC voltage stabilizing chip; the power supply isolation module 404 is 1 CAN power supply isolation module; the communication isolation unit 405 is a signal isolation chip; the transceiver unit 406 is a CAN transceiver chip; a driving voltage state monitoring unit 407 composed of a plurality of voltage dividing resistors and a plurality of peripheral circuits.
In one embodiment, the driving state voltage detection unit 407 monitors the driving voltage of the switch driving unit 402; the anodes of all the batteries in the module are connected to the anodes of the equalization interfaces (the first equalization interface 305 or the second equalization interface 308) through controllable switches in the controllable switch matrix, and the cathodes are connected to the cathodes of the corresponding equalization interfaces (the first equalization interface 305 or the second equalization interface 308) through controllable switches of the controllable switch matrix.
The voltage temperature sampling interface 304, the first equalization interface 305, the second equalization interface 308, the external temperature interface 306, and the power supply communication interface of the switch driving unit 402 are a pair of connectors that are male and female, and based on space consideration, part of the interfaces may be combined into a pair of connectors that are male and female;
the external temperature interface 306 supports 1-2 paths of external temperature expansion acquisition.
Further, referring to fig. 4, the invention discloses an electrical schematic block diagram of the integrated busbar, which specifically comprises the following steps: n strings of batteries are connected in series to form a battery pack, and the 1 st string of batteries C 1 The positive electrode of (a) passes through the fuse F 1 Then divided into two paths, one path is connected to the voltage temperature sampling interface, and the other path is connected to the controllable switch S 1P First string of cells C 1 Negative electrode of (2) or series 2 cell C 2 The positive electrode of (a) passes through the fuse F 2 Then divided into three paths, wherein one path is connected to a voltage and temperature sampling interface and the other path is connected to a first series of batteries C 1 Controllable switch S of negative electrode 1N One way is connected to the second series of cells C 2 Controllable switch S of positive electrode 2P Similarly, battery C of the nth string n Positive electrode or n-1 th series cell C n-1 Is passed through fuse F n Then divided into three paths, wherein one path is connected to a voltage temperature sampling interface and the other path is connected to the n-1 series battery C n-1 Controllable switch S of the negative pole of (2) (n-1)N One path is connected to a controllable switch S nP Last string of cells C n Is passed through fuse F n+1 Then divided into two paths, one path is connected to the voltage temperature sampling interface and the other path is connected to the controllable switch S nN . For any one of the strings of cells C k The anode and the cathode of the battery always pass through a fuse F k 、F k+1 There is a pair of voltage and temperature sampling interfaces, and a pair of controllable switches C kP 、C kN A pair of controllable switches corresponds to a group of equalization channels, the same group of switches are driven, and only one group of controllable switches are turned on at the same time; the collecting plate is provided with m paths of temperature sensors for collecting the busbar temperatures of different batteries in the module; in addition, a reserved 2-path acquisition interface of an external temperature sensor is arranged for connecting an external temperature sensor Th 1 And Th (Th) 2 The external temperature acquisition interface is connected to the voltage temperature acquisition interface of the acquisition board.
The control circuit and the power supply circuit of the controllable switch are connected to the balance control board through the control interface, the voltage stabilizing chip takes electricity from the balance interface and supplies power to the microprocessor, and the microprocessor monitors the driving voltage of the controllable switch; when equalization is needed, an external battery management system gives an equalization instruction to the microprocessor through the communication interface and supplies power to the driving circuit, and the microprocessor opens or closes a corresponding equalization channel through the driving circuit. And the state of the controllable switch is monitored through the state monitoring module, so that the balanced instruction is ensured to be executed correctly.
In a specific embodiment, referring to fig. 5, the present invention discloses a system block diagram of a multi-module application, specifically a 24-string battery system with an application integrated busbar:
the serial-parallel mode of the battery modules is 1-8, three identical modules are connected in series to finally form a 24-serial battery system, and the equalization interfaces of the three modules are connected end to end and finally connected to an equalization bus of the battery management system, in the embodiment, the equalization interfaces are connected with lithium batteries with the same attribute; because the equalization bus adopts a ring topology connection structure, any place has a contact problem, and the whole equalization system can still work; meanwhile, the resistance value of the whole equalization loop can be effectively reduced.
On the whole equalizing loop, the battery management system collects equalizing current and redundant battery voltage of the equalizing loop; the voltage of the redundant battery is boosted to 12V through DCDC and is supplied to the driving circuit through the driving power supply interface of the integrated busbar. The voltage temperature sampling signal of the module is connected to an analog front-end chip of the battery management system through a voltage temperature sampling interface, the analog front-end chip transmits the information of the collected voltage temperature and the like to a microprocessor of the battery management system through isolation communication, the microprocessor of the battery management system collects the current of a whole system loop through a main current detection chip at the same time, in addition, the microprocessor is communicated with the outside through an external communication interface, after receiving the information, the microprocessor determines when to balance the voltage state of a single battery of a battery in a battery charge-discharge state, and the voltage state of a redundant battery is used for balancing which battery, and the communication interface is used for isolating a communication unit to send a balancing instruction to a microprocessor; and the micro-processing on the integrated busbar opens or closes an equalization channel of a corresponding battery through a driving circuit according to an equalization instruction on the main control CAN bus, charges or discharges the equalized battery through an equalization interface, and judges whether the equalization instruction is executed correctly or not according to a state monitoring module.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention in a progressive manner. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. An active equalization module integrated busbar, comprising: the device comprises a busbar (1), a nickel plating copper strip (2), a sampling plate (3), an equalization control plate (4) and a structure fixing piece (5);
the sampling plate (3) is provided with an equalization control interface (307), and the sampling plate (3) is connected with the equalization control plate (4) through the equalization control interface (307); the busbar (1) and the sampling plate (3) are connected through the nickel plating copper strip (2); the busbar (1) and the sampling plate (3) are mounted on the fixing piece (5).
2. The active equalization module integrated busbar of claim 1, wherein,
the sampling plate (3) further comprises: a controllable switch matrix (301), a temperature sensor (302), a fuse (303), a voltage temperature sampling interface (304), an external temperature interface (306), a first equalization interface (305) and a second equalization interface (308);
the controllable switch matrix (301) and the voltage temperature sampling interface (304) are connected with the fuse (303);
the temperature sensor (302) and the external temperature interface (306) are both connected with the voltage temperature sampling interface (304); the voltage temperature sampling interface (304) is externally connected with a battery management system;
the first equalization interface (305) and the second equalization interface (308) are respectively connected with two adjacent modules.
3. The active equalization module integrated busbar of claim 2, wherein the controllable switch matrix (301) is comprised of any one of MOSFET field effect transistors, solid state relays, optocoupler relays, IGBTs, and GaN.
4. The active equalization module integrated busbar of claim 2, wherein,
the rated current of the fuse (303) is 5-20A.
5. The active equalization module integrated busbar of claim 2, wherein,
the equalization control board (4) includes: the device comprises a microprocessor (401), a switch driving unit (402), a voltage stabilizing unit (403), a power supply isolation unit (404), a communication isolation unit (405), a receiving and transmitting unit (406) and a driving voltage state monitoring unit (407);
the switch driving unit (402) is connected with the input end of the control switch matrix (301) and is used for controlling the on/off of the control switch matrix (301);
the voltage stabilizing unit (403) is connected with the voltage input end of the microprocessor (401) and is used for stabilizing voltage and outputting rated voltage to supply power to the microprocessor (401) after power is taken from the balance control interface (307);
the microprocessor (401) is connected with the input end of the switch driving unit (402) and is used for controlling the working state of the switch driving unit (402);
the driving state voltage detection unit (407) is connected with the output end of the switch driving unit (402) and is used for detecting the working state of the switch driving unit (402);
the driving state voltage detection unit (407) is connected with the input end of the microprocessor (401) and is used for inputting the detected working state of the switch driving unit (402) into the microprocessor (401).
6. The active equalization module integrated busbar of claim 1, wherein,
the balance control board (4) is arranged on the sampling board (3) and is detachably connected.
7. The active equalization module integrated busbar of any of claims 1-6, wherein,
the busbar (1) and the nickel plating copper strip (2) are connected by adopting ultrasonic welding, laser welding or resistance welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111565319.5A CN116315921A (en) | 2021-12-20 | 2021-12-20 | Active equalization battery module integrated busbar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111565319.5A CN116315921A (en) | 2021-12-20 | 2021-12-20 | Active equalization battery module integrated busbar |
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| CN116315921A true CN116315921A (en) | 2023-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117595466A (en) * | 2024-01-18 | 2024-02-23 | 杭州高特电子设备股份有限公司 | Dual-redundancy acquisition monitoring battery active equalization system and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117595466A (en) * | 2024-01-18 | 2024-02-23 | 杭州高特电子设备股份有限公司 | Dual-redundancy acquisition monitoring battery active equalization system and control method |
| CN117595466B (en) * | 2024-01-18 | 2024-05-14 | 杭州高特电子设备股份有限公司 | Dual-redundancy acquisition monitoring battery active equalization system and control method |
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