CN211127162U - Active equalization circuit suitable for 16-string battery pack - Google Patents
Active equalization circuit suitable for 16-string battery pack Download PDFInfo
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- CN211127162U CN211127162U CN201921240991.5U CN201921240991U CN211127162U CN 211127162 U CN211127162 U CN 211127162U CN 201921240991 U CN201921240991 U CN 201921240991U CN 211127162 U CN211127162 U CN 211127162U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model relates to the technical field of electric automobile battery management, in particular to an active equalization circuit suitable for 16-string battery packs, which comprises a battery pack, a single-string voltage compensation module, a relay switching control module, an equalization string number selection module, an MCU module and a voltage detection module; the voltage detection module is used for detecting the voltage of each string of battery pack and transmitting voltage data to the MCU module; the single-string voltage compensation module charges each string of battery packs through the relay switching control module; and the MCU module receives the voltage data and controls the on and off of each relay module through the balancing string number selection module. The utility model discloses a set up single cluster voltage compensation module, relay switching control module, balanced cluster number selection module, MCU module and voltage detection module and realized improving the utilization ratio of battery package to the initiative equalizing control of battery package to prolong its circulation life.
Description
Technical Field
The invention relates to the technical field of battery management of electric vehicles, in particular to an active equalization circuit suitable for 16-string battery packs.
Background
In the manufacturing process of the electric automobile, due to the technical problem and uneven material, the thickness, the microporosity, the activation degree of the active substance and the like of the battery pole plate have slight differences, and the incomplete consistency of the internal structure and the material of the battery can prevent the parameter values of the capacity, the internal resistance, the voltage and the like of the battery of the same model which is delivered from the factory in the same batch from being completely consistent.
In addition, the long-term use of the battery pack can cause the inconsistent accumulation of the single battery cells, the longer the time, the greater the difference of the single battery cells, and the service life of the battery pack is seriously influenced. It is therefore very necessary to involve equalization control in the BMS circuit.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned shortcomings in the prior art, and providing an active equalization circuit suitable for a 16-string battery pack.
The purpose of the invention is realized by the following technical scheme: an active equalization circuit suitable for 16-string battery packs comprises a battery pack, a single-string voltage compensation module, a relay switching control module, an equalization string number selection module, an MCU module and a voltage detection module; the battery pack comprises 16 strings of battery packs; the relay switching control module comprises 17 relay modules; the 16 strings of battery packs are correspondingly connected with the 17 relay modules;
the voltage detection module is used for detecting the voltage of each string of battery pack and transmitting voltage data to the MCU module;
the single-string voltage compensation module charges each string of battery packs through the relay switching control module;
and the MCU module receives the voltage data and controls the on and off of each relay module through the balancing string number selection module.
The invention further provides that the single-string voltage compensation module comprises a power circuit and an H-shaped circuit; the power supply circuit comprises an isolation step-down chip U9 and a charging chip U5; the input end of the isolation voltage reduction chip U9 is connected with a main power supply; the output end of the isolation voltage reduction chip U9 is connected with the input end of the charging chip U5; and the positive output end and the negative output end of the charging chip U5 are respectively connected with the H-shaped circuit.
The single-string voltage compensation module further comprises a triode T2 and an MOS tube Q7, and the CPU _ BA L IN end of the MCU module controls the connection and disconnection between the input end of the isolation buck chip U9 and a main power supply through the triode T2 and the MOS tube Q7.
The H-type circuit further comprises a relay R9, a relay R10, a relay R012, a relay R113, a triode T and a triode T, wherein the input end of the relay R29 and the input end of the relay R310 are connected with the positive output end of a charging chip U, the output end of the relay R49 is connected with the input end of the relay R512, an output port OUT is connected between the output end of the relay R69 and the input end of the relay R712, the output end of the relay R810 is connected with the input end of the relay R913, an output port OUT is connected between the output end of the relay R10 and the input end of the relay R13, the output port OUT and the output port OUT are respectively connected with a relay switching control module, the output end of the relay R12 and the output end of the relay R13 are respectively connected with the negative output end of the charging chip U, the control end of the relay R9 and the control end of the relay R13 are respectively connected with the same end of an equalizing selection module through the triode T and the triode T, and the control end of the equalizing selection module of the equalizing string are respectively connected with the same triode T.
The invention is further set up in that the 16 strings of battery packs are divided into single strings of battery packs and double strings of battery packs; the 17 relay modules are divided into a single-string relay module and a double-string relay module; the single-string relay module and the double-string relay module are respectively connected with the single-string battery pack and the double-string battery pack; the single-string relay module and the double-string relay module respectively comprise a selection relay and a selection triode;
in the single-string relay module, the input end of a selection relay is connected with an output port OUT1, the output end of the selection relay is connected with a single-string-number battery pack, and the control end of the selection relay is connected with the balanced-string-number selection module through a selection triode;
in the double-string relay module, the input end of a selection relay is connected with the output port OUT2, the output end of the selection relay is connected with the double-string-number battery pack, and the control end of the selection relay is connected with the balanced-string-number selection module through a selection triode.
The invention is further set that the equalizing string number selection module comprises a multi-path AND gate chip U2, a triode Q1 and a triode Q2, the MCU module comprises a CPU _ L INI end and a CPU _ L IN2 end, the CPU _ L INI end is connected with the 1A input end of the multi-path AND gate chip U2, the CPU _ L IN2 end is connected with the 1B input end of the multi-path AND gate chip U2 through the triode Q1, and the 1Y output end of the multi-path AND gate chip U2 is respectively connected with the control end of the relay R L9 and the control end of the relay R L13;
the CPU _ L INI end is connected with the 3A input end of the multi-path AND gate chip U2 through a triode Q2, the CPU _ L IN2 end is connected with the 3B input end of the multi-path AND gate chip U2, and the 3Y output end of the multi-path AND gate chip U2 is connected with the control end of the relay R L10 and the control end of the relay R L12 respectively.
The invention is further arranged that the equalizing string number selecting module comprises a decoder U11, a decoder U12, a decoder U14 and a decoder U16; the MCU module comprises a CPU _ S0 end, a CPU _ S1 end and a CPU _ S2 end; the CPU _ S0 terminal, the CPU _ S1 terminal and the CPU _ S2 terminal are respectively connected with A0, A1 and A3 terminals of a decoder U11, a decoder U12, a decoder U14 and a decoder U16;
the CPU _ L INI end and the CPU _ L IN2 end are respectively connected with the E3 end and the E2 end of the decoder U11 and the decoder U14, the CPU _ L INI end and the CPU _ L IN2 end are respectively connected with the E2 end and the E3 end of the decoder U12 and the decoder U16, and the output ends of the decoder U11, the decoder U12, the decoder U14 and the decoder U16 are respectively connected with the relay module.
The invention has the beneficial effects that: according to the invention, the active balance control of each battery pack string is realized by arranging the single-string voltage compensation module, the relay switching control module, the balance string number selection module, the MCU module and the voltage detection module, so that the utilization rate of the battery packs is improved, and the cycle service life of the battery packs is prolonged.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a circuit diagram of the power supply circuit of the present invention;
FIG. 3 is a circuit diagram of the H-type circuit of the present invention;
FIG. 4 is a circuit diagram of the multiple AND gate chip U2 of the present invention;
FIG. 5 is a circuit diagram of a single series relay module of the present invention;
fig. 6 is a circuit diagram of a dual string relay module of the present invention;
fig. 7 is a circuit diagram of the decoder of the present invention.
Detailed Description
The invention is further described with reference to the following examples.
As can be seen from fig. 1 to 7; the active equalization circuit suitable for the 16-string battery pack comprises a battery pack, a single-string voltage compensation module, a relay switching control module, an equalization string number selection module, an MCU module and a voltage detection module; the battery pack comprises 16 strings of batteries B1-B16; the relay switching control module comprises 17 relay modules; the 16 strings of battery packs are correspondingly connected with the 17 relay modules; the total electric quantity of the 16 strings of battery packs is connected into a total battery pack, one of the 17 relay modules controls the switch of the total battery pack, and the total battery pack can supply power to the single string of voltage compensation module;
the voltage detection module is used for detecting the voltage of each string of battery pack and transmitting voltage data to the MCU module;
the single-string voltage compensation module charges each string of battery packs through the relay switching control module;
and the MCU module receives the voltage data and controls the on and off of each relay module through the balancing string number selection module. The MCU module can be a single chip microcomputer, the voltage detection module is a voltage acquisition chip, and the voltage acquisition chip and the single chip microcomputer are all existing modules, so that the MCU module is not drawn in the drawing.
Specifically, in the active equalization circuit applicable to 16 strings of battery packs according to this embodiment, when the voltage detection module at the front end detects that the difference between the voltage of a certain string of battery packs and other voltages is greater than the set threshold, a notification is sent to the MCU module, and the MCU module controls the equalization string number selection module to turn on the relay module corresponding to the string of battery packs, so as to implement equalization control; when the voltage detection module detects that the difference value between the voltage of a certain string of battery packs and other voltages is smaller than a set threshold value, a notification is sent to the MCU module, and the MCU module controls the balancing string number selection module to close the relay module corresponding to the string of battery packs, so that balancing control is closed. When the voltage difference between all the monomers is smaller than the set threshold value, the MCU module closes the power input end of the single-string voltage compensation module, so that the single-string voltage compensation module does not work, the utilization rate of the battery pack is improved, and the cycle service life of the battery pack is prolonged.
In the active equalization circuit suitable for 16 strings of battery packs in this embodiment, the single string of voltage compensation module includes a power circuit and an H-type circuit; the power supply circuit comprises an isolation step-down chip U9 and a charging chip U5; the input end of the isolation voltage reduction chip U9 is connected with a main power supply; the output end of the isolation voltage reduction chip U9 is connected with the input end of the charging chip U5; and the positive output end and the negative output end of the charging chip U5 are respectively connected with the H-shaped circuit.
The total power supply is the total electric quantity of 16 strings of battery packs, and the total electric quantity of the 16 strings of battery packs is reduced to the voltage capable of supplementing electricity for the single string of battery packs through the isolation voltage reduction chip U9 and the charging chip U5.
According to the active equalization circuit suitable for the 16-string battery pack, the MCU module comprises a CPU _ BA L IN end, the single-string voltage compensation module further comprises a triode T2 and an MOS tube Q7, the CPU _ BA L IN end of the MCU module controls the connection and disconnection of the input end of the isolation voltage reduction chip U9 and a main power supply through the triode T2 and the MOS tube Q7, through the arrangement, when the voltage difference between all the single bodies is smaller than a set threshold value, the MCU module can close the power supply input end of the single-string voltage compensation module through the triode T2 and the MOS tube Q7, the single-string voltage compensation module does not work, the utilization rate of the battery pack is improved, and the cycle service life of the battery pack is prolonged.
The active equalization circuit suitable for the 16-string battery pack comprises a relay R9, a relay R10, a relay R012, a relay R113, a triode T and a triode T, wherein an input end of the relay R29 and an input end of the relay R310 are connected with a positive output end of a charging chip U, an output end of the relay R49 is connected with an input end of a relay R512, an output port OUT is connected between an output end of the relay R69 and an input end of the relay R712, an output end of the relay R810 is connected with an input end of a relay R913, an output port OUT is connected between an output end of the relay R10 and an input end of a relay R13, the output port OUT and the output port OUT are respectively connected with a relay switching control module, an output end of the relay R12 and an output end of the relay R13 are both connected with a negative output end of the charging chip U, a control end of the relay R9 and a control end of the relay R13 are respectively connected with the same end of an equalization number selection module through the triode T and the triode T, and a control string of the relay R12 are respectively connected with the same number selection module through the triode T and the triode.
Because the relay R L9 and the relay R L13 are controlled by the IN1_ IN control foot, and the relay R L10 and the relay R L12 are controlled by the IN2_ IN control foot, only one of the two sets of relays can be opened, so that the flow direction of equalizing current can be controlled, namely VO _5V + → relay R L9 → output port OUT1 → output port OUT2 → relay R L13 → VOUT 5V-or VO _5V + → relay R L10 → output port OUT2 → output port OUT1 → relay R L12 → VOUT 5V-.
In the active equalization circuit suitable for 16 strings of battery packs in this embodiment, the 16 strings of battery packs are divided into a single string of battery packs and a double string of battery packs; the 17 relay modules are divided into a single-string relay module and a double-string relay module; the single-string relay module and the double-string relay module are respectively connected with the single-string battery pack and the double-string battery pack; the single-string relay module and the double-string relay module respectively comprise a selection relay and a selection triode;
in the single-string relay module, the input end of a selection relay is connected with an output port OUT1, the output end of the selection relay is connected with a single-string-number battery pack, and the control end of the selection relay is connected with the balanced-string-number selection module through a selection triode;
in the double-string relay module, the input end of a selection relay is connected with the output port OUT2, the output end of the selection relay is connected with the double-string-number battery pack, and the control end of the selection relay is connected with the balanced-string-number selection module through a selection triode.
The relay switching control module is mainly divided into 17 channels from BAT0 to BAT16, wherein BAT0 is connected with a main power supply, a double-string relay module is connected with an output port OUT2, a single-string relay module is connected with an output port OUT1, the double-string relay module and the single-string relay module are both connected with the battery pack end through fuses, one ends of driving pins of the double-string relay module and the single-string relay module are connected with a collector of the selection triode, the other end of the driving pins of the double-string relay module and the single-string relay module are connected with the ground, an emitter of a PNP triode is connected with a 5V driving power supply, a base of the PNP triode is connected with terminals BA L-BA L, when the base of the selection triode is in a low level, a collector of the selection triode is in saturation conduction with the emitter, a coil of the driving terminal of the selection relay is electrified, and the input and output terminals of the relay are conducted.
The active equalization circuit suitable for the 16-string battery pack comprises a multi-path AND gate chip U2, a triode Q1 and a triode Q2, wherein the MCU module comprises a CPU _ L INI end and a CPU _ L IN2 end, the CPU _ L INI end is connected with the 1A input end of the multi-path AND gate chip U2, the CPU _ L IN2 end is connected with the 1B input end of the multi-path AND gate chip U2 through the triode Q1, and the 1Y output end of the multi-path AND gate chip U2 is respectively connected with the control end of a relay R L9 and the control end of a relay R L13;
the CPU _ L INI end is connected with the 3A input end of the multi-path AND gate chip U2 through a triode Q2, the CPU _ L IN2 end is connected with the 3B input end of the multi-path AND gate chip U2, and the 3Y output end of the multi-path AND gate chip U2 is connected with the control end of the relay R L10 and the control end of the relay R L12 respectively.
In the active equalization circuit suitable for a 16-string battery pack according to this embodiment, the equalization string number selection module includes a decoder U11, a decoder U12, a decoder U14, and a decoder U16; the MCU module comprises a CPU _ S0 end, a CPU _ S1 end and a CPU _ S2 end; the CPU _ S0 terminal, the CPU _ S1 terminal and the CPU _ S2 terminal are respectively connected with A0, A1 and A3 terminals of a decoder U11, a decoder U12, a decoder U14 and a decoder U16;
the CPU _ L INI end and the CPU _ L IN2 end are respectively connected with the E3 end and the E2 end of the decoder U11 and the decoder U14, the CPU _ L INI end and the CPU _ L IN2 end are respectively connected with the E2 end and the E3 end of the decoder U12 and the decoder U16, and the output ends of the decoder U11, the decoder U12, the decoder U14 and the decoder U16 are respectively connected with the relay module.
Specifically, assuming that the CPU _ S0 terminal, the CPU _ S1 terminal, the CPU _ S2 terminal are all made to be a transistor L (i.e., a0, a1, a2 is L), the CPU _ L0 IN1 terminal is H, the CPU _ L1 IN2 terminal is made to be a transistor L2 (i.e., a decoder U11, an E2 of a decoder U14 is L3, an E3 is H. and a decoder U12, the E16 of the decoder U16 is H, the E16 is 16 4), the decoder U16 and the Y16 of the decoder U16 output are low, and the decoder U16 are made to be high output when the input characteristics E16 are 16H (Y16-Y16) from the input terminal characteristic E16, the BA 16, the pins of the decoder U16 are turned on due to the transistor 16B, the transistor 16B is turned on, the transistor 16B, the transistor 16B is turned on, the transistor 16B, the transistor B is turned on the transistor 16B, the transistor B16B is turned on, the transistor B16B, the transistor B is turned on the transistor B16B, the transistor B16B, the transistor B is turned on.
Assuming that the CPU _ S terminal, the CPU _ S terminal and the CPU _ S terminal of the MCU module are all (i.e., a is), the CPU _ 0IN terminal is 1, the CPU _ 2IN terminal is H (i.e., the decoder U, E of the decoder U is H, E is 3. the decoder U, E of the decoder U is 4, E is H), the Y outputs of the decoder U and the decoder U are low, and the decoder U are both high outputs from the input terminal characteristic E of 5 (Y-Y), at this time BA 61, BA 72 pin is pulled down due to the low Y output of the decoder U, the transistor Q of the decoder U and the transistor Q of the relay switching control module are both turned on to conduct the relay R819 and the relay R916 → to conduct the BAT with the output port OUT, the BAT and the output port OUT, the CPU _ IN terminal is H, and the MCU 1IN terminal is H, accordingly, it is known that the CPU _ IN terminal of the gate multi-channel chip U is 2 a 1A, 1B is 3 (i.e), the CPU _ IN terminal is turned on to the gate switching control module U, the gate terminal is turned on to the gate terminal, the transistor R3, the gate terminal is set to be turned on to the transistor H + the transistor H, and the transistor H + T-IN terminal of the gate switching control module, and the transistor B, thereby the transistor B is set to be turned on, the transistor H, the gate circuit.
The following table: functional table of decoder:
integrated decoder function table
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. An active equalization circuit for a 16-string battery pack, comprising: the system comprises a battery pack, a single-string voltage compensation module, a relay switching control module, a balanced string number selection module, an MCU module and a voltage detection module; the battery pack comprises 16 strings of battery packs; the relay switching control module comprises 17 relay modules; the 16 strings of battery packs are correspondingly connected with the 17 relay modules;
the voltage detection module is used for detecting the voltage of each string of battery pack and transmitting voltage data to the MCU module;
the single-string voltage compensation module charges each string of battery packs through the relay switching control module;
and the MCU module receives the voltage data and controls the on and off of each relay module through the balancing string number selection module.
2. The active equalization circuit for a battery pack of 16 strings as claimed in claim 1, wherein: the single-string voltage compensation module comprises a power circuit and an H-shaped circuit; the power supply circuit comprises an isolation step-down chip U9 and a charging chip U5; the input end of the isolation voltage reduction chip U9 is connected with a main power supply; the output end of the isolation voltage reduction chip U9 is connected with the input end of the charging chip U5; and the positive output end and the negative output end of the charging chip U5 are respectively connected with the H-shaped circuit.
3. The active equalization circuit applicable to the 16-string battery pack according to claim 2, wherein the MCU module comprises a CPU _ BA L IN end, the single-string voltage compensation module further comprises a triode T2 and a MOS transistor Q7, and the CPU _ BA L IN end of the MCU module controls the on-off of the input end of the isolation buck chip U9 and a main power supply through the triode T2 and the MOS transistor Q7.
4. The active equalization circuit suitable for the 16-string battery pack is characterized in that the H-shaped circuit comprises a relay R9, a relay R10, a relay R012, a relay R113, a triode T and a triode T, an input end of the relay R29 and an input end of the relay R310 are connected with a positive output end of a charging chip U, an output end of the relay R49 is connected with an input end of a relay R512, an output end OUT is connected between an output end of the relay R69 and an input end of the relay R712, an output end of the relay R810 is connected with an input end of a relay R913, an output end OUT is connected between an output end of the relay R10 and an input end of a relay R13, the output ends OUT and OUT are respectively connected with a relay switching control module, an output end of the relay R12 and an output end of the relay R13 are both connected with a negative output end of the charging chip U, a control end of the relay R9 and a control end of the relay R13 are respectively connected with the same end of a string number selection module through the triode T and the triode T, and a control end of the relay R12 are respectively connected with the same number selection module through the triode T.
5. The active equalization circuit for a battery pack of 16 strings as claimed in claim 4, wherein: the 16 strings of battery packs are divided into single strings of battery packs and double strings of battery packs; the 17 relay modules are divided into a single-string relay module and a double-string relay module; the single-string relay module and the double-string relay module are respectively connected with the single-string battery pack and the double-string battery pack; the single-string relay module and the double-string relay module respectively comprise a selection relay and a selection triode;
in the single-string relay module, the input end of a selection relay is connected with an output port OUT1, the output end of the selection relay is connected with a single-string-number battery pack, and the control end of the selection relay is connected with the balanced-string-number selection module through a selection triode;
in the double-string relay module, the input end of a selection relay is connected with the output port OUT2, the output end of the selection relay is connected with the double-string-number battery pack, and the control end of the selection relay is connected with the balanced-string-number selection module through a selection triode.
6. The active equalization circuit suitable for the 16-string battery pack is characterized IN that the equalization string number selection module comprises a multi-way AND gate chip U2, a triode Q1 and a triode Q2, the MCU module comprises a CPU _ L INI end and a CPU _ L IN2 end, the CPU _ L INI end is connected with a 1A input end of the multi-way AND gate chip U2, the CPU _ L IN2 end is connected with a 1B input end of the multi-way AND gate chip U2 through the triode Q1, and a 1Y output end of the multi-way AND gate chip U2 is connected with a control end of a relay R L9 and a control end of a relay R L13 respectively;
the CPU _ L INI end is connected with the 3A input end of the multi-path AND gate chip U2 through a triode Q2, the CPU _ L IN2 end is connected with the 3B input end of the multi-path AND gate chip U2, and the 3Y output end of the multi-path AND gate chip U2 is connected with the control end of the relay R L10 and the control end of the relay R L12 respectively.
7. The active equalization circuit for a battery pack of 16 strings as claimed in claim 6, wherein: the balanced string number selection module comprises a decoder U11, a decoder U12, a decoder U14 and a decoder U16; the MCU module comprises a CPU _ S0 end, a CPU _ S1 end and a CPU _ S2 end; the CPU _ S0 terminal, the CPU _ S1 terminal and the CPU _ S2 terminal are respectively connected with A0, A1 and A3 terminals of a decoder U11, a decoder U12, a decoder U14 and a decoder U16;
the CPU _ L INI end and the CPU _ L IN2 end are respectively connected with the E3 end and the E2 end of the decoder U11 and the decoder U14, the CPU _ L INI end and the CPU _ L IN2 end are respectively connected with the E2 end and the E3 end of the decoder U12 and the decoder U16, and the output ends of the decoder U11, the decoder U12, the decoder U14 and the decoder U16 are respectively connected with the relay module.
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| CN201921240991.5U CN211127162U (en) | 2019-07-31 | 2019-07-31 | Active equalization circuit suitable for 16-string battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110311450A (en) * | 2019-07-31 | 2019-10-08 | 广东思诺伟智能技术有限公司 | A kind of active equalization circuit suitable for 16 string battery packs |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110311450A (en) * | 2019-07-31 | 2019-10-08 | 广东思诺伟智能技术有限公司 | A kind of active equalization circuit suitable for 16 string battery packs |
| CN110311450B (en) * | 2019-07-31 | 2024-05-07 | 广东思诺伟智能技术有限公司 | Active equalization circuit suitable for 16-string battery pack |
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