CN116142015A - Power battery charging system and low-temperature charging control strategy thereof - Google Patents
Power battery charging system and low-temperature charging control strategy thereof Download PDFInfo
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- CN116142015A CN116142015A CN202310222283.3A CN202310222283A CN116142015A CN 116142015 A CN116142015 A CN 116142015A CN 202310222283 A CN202310222283 A CN 202310222283A CN 116142015 A CN116142015 A CN 116142015A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a power battery charging system and a low-temperature charging control strategy thereof, wherein the power battery charging system comprises a battery management system and a charging and discharging circuit arranged in the power battery system, the charging and discharging circuit comprises a first circuit, a second circuit and a heating circuit, two ends of the first circuit are respectively connected with the positive electrode of a power battery module and the total positive electrode of the power battery system, and two ends of the second circuit are respectively connected with the negative electrode of the power battery module and the total negative electrode of the power battery system; the first circuit is provided with a maintenance switch and a main positive relay, and the second circuit is provided with a current sensor and a main negative relay; one end of the heating circuit is connected with a first circuit positioned between the maintenance switch and the main positive relay, the other end of the heating circuit is connected with a second circuit positioned between the main negative electrode and the main negative relay, and the heating circuit is provided with a battery heating film and a heating relay; the main positive, main negative and heating relays are respectively and electrically connected with the battery management system. The invention can effectively prolong the service life of the power battery.
Description
Technical Field
The invention belongs to the technical field of new energy automobile charging, and particularly relates to a power battery charging system and a low-temperature charging control strategy thereof.
Background
The low-temperature charging system for the power battery of the new energy automobile is a key technology of the new energy automobile, taking an economical pure electric light truck as an example, the power battery technology is mainly a lithium iron phosphate battery, and when T is Battery min When the battery is charged at the temperature of less than 0 ℃, namely, when the battery is charged at a low temperature, the battery heating film is only allowed to be charged, so that the temperature of the battery is increased as soon as possible, but the battery is not allowed to be charged, so that the service life of the battery is ensured, because the conductivity of the battery electrolyte is lower, the phenomenon of lithium precipitation is easy to occur, lithium dendrites are generated, and the dendrites puncture the diaphragm to cause short circuit of the positive electrode and the negative electrode, so that the battery is internally short-circuited, the battery is damaged, and the battery safety accident is easy to be caused. However, the low-temperature charging system in the prior art still charges the battery during low-temperature charging, thereby shortening the service life of the battery. Therefore, how to design a power battery charging system and a low-temperature charging control strategy thereof to better avoid charging the battery during low-temperature charging, thereby prolonging the service life of the battery, and becoming a technical problem which needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a power battery charging system which is used for solving the technical problems in the prior art. It is another object of the present invention to provide a low temperature charge control strategy for a power battery.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the power battery charging system comprises a battery management system and a charging and discharging circuit arranged in the power battery system, wherein the charging and discharging circuit comprises a first circuit, a second circuit and a heating circuit, two ends of the first circuit are respectively connected with the positive electrode of a power battery module and the total positive electrode of the power battery system, and two ends of the second circuit are respectively connected with the negative electrode of the power battery module and the total negative electrode of the power battery system; the first circuit is sequentially provided with a maintenance switch and a main positive relay, and the second circuit is sequentially provided with a current sensor and a main negative relay; one end of the heating circuit is connected with the first circuit between the maintenance switch and the main positive relay, the other end of the heating circuit is connected with the second circuit between the total negative electrode and the main negative relay, and the heating circuit is provided with a battery heating film and a heating relay; the main positive relay, the main negative relay and the heating relay are respectively and electrically connected with the battery management system.
Preferably, the battery management system further comprises a pre-charging circuit, wherein two ends of the pre-charging circuit are respectively connected with the first circuits at two ends of the main positive relay, the pre-charging circuit is provided with a pre-charging relay and a pre-charging resistor in series, and the pre-charging relay is electrically connected with the battery management system.
Preferably, the current sensor is a hall current sensor.
A power cell low temperature charge control strategy, comprising:
when the battery management system recognizes T Battery min When the temperature is less than or equal to 0 ℃, the heating relay is controlled to be closed, so that the power battery system enters a low-temperature heating stage, and the battery heating film is heated by utilizing the current input by the charging pile; when the current sensor detects that the second circuit has current, the battery management system controls the main negative relay to be disconnected so as to ensure that the current output by the charging pile only flows into the battery heating film until T Battery min Raising the temperature to 1 ℃;
when T is identified Battery min When the temperature is more than or equal to 1 ℃, the battery management system controls the main negative relay to be closed, and the battery management system enters a heating stage while charging at a low temperature;
when T is Battery min When the temperature is more than or equal to 15 ℃, the battery management system controls the heating relay to be disconnected, the battery management system enters a low-temperature charging stage, and only the power battery module is charged until T Battery min And (5) reaching 45 ℃ to finish low-temperature charging.
Preferably, in the low-temperature heating stage, the battery management system requests the charging pile to perform constant-current power supply, and the current request value sent by the battery management system to the charging pile is the power/current voltage of the battery heating film.
Preferably, the heating stage is carried out at a temperature of 5℃ while charging at a low temperature>T Battery min When the temperature is more than or equal to 1 ℃, the current request value is 0.1C+the power/current voltage of the battery heating film, wherein C is the charging power value of the power battery module for 1 h; when 15 DEG C>T Battery min And when the temperature is more than or equal to 5 ℃, the current request value of the battery management system is 0.25 C+the power/current voltage of the battery heating film.
Preferably at 45 DEG C>T Battery min And when the temperature is more than or equal to 15 ℃, the current request value of the battery management system is 0.8 ℃.
Preferably, when T Battery min And when the temperature is more than or equal to 1 ℃, the battery management system firstly closes the main negative relay and the pre-charging relay, and after the pre-charging is completed, the main positive relay is closed again, and after the first set time is delayed, the pre-charging relay is opened.
The invention has the beneficial effects that:
the power battery charging system of the invention is characterized in that Battery min When the temperature is less than or equal to 0 ℃, the power battery system is in a low-temperature heating stage, whether current exists in the second circuit or not is detected by the current sensor, and when the current exists, the battery management system controls the main negative relay to be disconnected, so that the power battery module is not charged in the low-temperature heating stage, the phenomenon of lithium precipitation of the power battery module is avoided well, and the service life of the power battery module is prolonged effectively.
The low-temperature charging control strategy of the power battery has the beneficial effects.
Drawings
For a clearer description of embodiments of the present application or of the prior art, reference will be made briefly to the drawings which are required to be used in the embodiments, and a further detailed description of specific embodiments of the invention will be given with reference to the accompanying drawings, in which
Fig. 1 is an electrical schematic diagram of a power battery charging system according to an embodiment of the present invention.
The reference numerals in the drawings:
11. a first circuit 12, a maintenance switch 13, a main positive relay 21, a second circuit,
22. a current sensor 23, a main negative relay 31, a heating circuit 32, a battery heating film,
33. heating relay, 41, pre-charging circuit, 42, pre-charging relay, 43, pre-charging resistor,
51. a power battery module 52, a total positive electrode 53, a total negative electrode 54, a communication interface,
61. main loop safety, 62, motor controller, 63, motor, 64, X capacitance,
71. a quick charge relay, 72, a quick charge safety, 81, an air conditioner AC relay,
82. AC relay safety, 83, first interface, 91, DCDC relay,
92. DCDC relay insurance, 93, DCDC module, 94, second interface.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present solution will be described in further detail with reference to specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a power battery charging system, which includes a battery management system, and a charging and discharging circuit disposed in the power battery system, where the charging and discharging circuit includes a first circuit 11, a second circuit 21, and a heating circuit 31, two ends of the first circuit 11 are respectively connected to an anode of a power battery module 51 and a total anode 52 of the power battery system, and two ends of the second circuit are respectively connected to a cathode of the power battery module 51 and a total cathode 53 of the power battery system; a maintenance switch 12 (MSD for short) and a main positive relay 13 are sequentially arranged on the first circuit, and a current sensor 22 and a main negative relay 23 are sequentially arranged on the second circuit; one end of the heating circuit 31 is connected with the first circuit between the maintenance switch and the main positive relay, the other end of the heating circuit is connected with the second circuit between the total negative electrode and the main negative relay, and a battery heating film 32 and a heating relay 33 are arranged on the heating circuit; the main positive relay, the main negative relay, and the heating relay 33 are electrically connected with the battery management system, respectively.
The power battery charging system provided by the embodiment of the invention is characterized in that the power battery charging system is arranged at T Battery min When the temperature is less than or equal to 0 ℃ and the power battery system is in a low-temperature heating stage, whether current exists in the second circuit or not is detected by using the current sensor 22, and when the current exists, the battery management system controls the main negative relay to be disconnected, so that the power battery module is not charged in the low-temperature heating stage, the phenomenon of lithium precipitation of the power battery module is avoided well, and the service life of the power battery module is prolonged effectively.
It will be appreciated that T Battery min A minimum value indicating the temperature detected by each temperature sensor in the power battery module; the maintenance switch 12 is generally designed as a pluggable structure as in the prior art, and is used for cutting off a circuit during high-voltage maintenance, and the maintenance switch is generally integrated with a safety device, so that the circuit is cut off in an emergency mode when the high-voltage circuit is short-circuited, and the high-voltage circuit is protected.
Further, the power battery charging system further comprises a pre-charging circuit 41, two ends of the pre-charging circuit are respectively connected with the first circuits at two ends of the main positive relay, a pre-charging relay 42 and a pre-charging resistor 43 are arranged on the pre-charging circuit in series, and the pre-charging relay is electrically connected with the battery management system. With this arrangement, the precharge circuit 41 can be used to precharge, and after the precharge is completed, the main positive relay is closed again to charge the power battery module until the charging is completed. It will be appreciated that the pre-charge is to protect the X capacitor 64 in the high voltage loop from damage caused by direct high voltage turn-on; the conditions for the completion of the priming are: the voltage at two ends of the X capacitor reaches more than 90% of the high voltage of the battery module.
Specifically, the current sensor 22 is a hall current sensor.
The embodiment of the invention also provides a low-temperature charging control strategy of the power battery, which comprises the following steps:
when the battery management system recognizes T Battery min When the temperature is less than or equal to 0 ℃, the heating relay 33 is controlled to be closed, so that the power battery system enters a low-temperature heating stage, and the battery heating film is added by utilizing the current input by the charging pileHeat; when the current sensor 22 detects that the second circuit has current, the battery management system controls the main negative relay 23 to be opened so as to ensure that the current output by the charging pile only flows into the battery heating film 32 until T Battery min Raising the temperature to 1 ℃;
when T is identified Battery min When the temperature is more than or equal to 1 ℃, the battery management system controls the main negative relay 23 to be closed, and enters a low-temperature charging and heating stage, and at the moment, T Battery min Continuing to rise;
when T is Battery min When the temperature is not less than 15 ℃, the battery management system controls the heating relay 33 to be switched off, the low-temperature charging stage is started, no current passes through the heating circuit, the heating of the battery heating film is stopped, and the current output by the charging pile only charges the power battery module until T Battery min And (5) reaching 45 ℃ to finish low-temperature charging.
The low-temperature charging control strategy for the power battery provided by the embodiment of the invention has the technical effects.
It may be preferred that the battery management system controls the main negative relay 23 to open within 1 second after the current sensor 22 detects the current in the second circuit during the low temperature heating phase.
Further, in the low-temperature heating stage, the battery management system requests the charging pile to perform constant-current power supply, and the charging current request value sent by the battery management system to the charging pile is the power/current voltage of the battery heating film. If the power of the battery heating film is 4.2kW, the current voltage is 537V, and the current request value at this time is only the current value required by the battery heating film, which is: 4200/537=7.8a.
Specifically, in the heating stage while charging at low temperature, the temperature is 5 DEG C>T Battery min When the temperature is more than or equal to 1 ℃, the current request value is 0.1C+the power/current voltage of the battery heating film, wherein C is the charging power value of the power battery module for 1h, and if the battery capacity is 180Ah, the 1℃ is 180A; when 15 DEG C>T Battery min When the temperature is more than or equal to 5 ℃, the current request value of the battery management system is 0.25C+the power/current voltage of the battery heating film, and the current request value required by the power battery system comprises two parts, namely: current value for charging power battery module0.25C, and a current value for heating the battery heating film.
It may be preferable that the temperature is 45 DEG C>T Battery min And the current request value of the battery management system is 0.8C and is equal to the current value for charging the power battery module. In addition, 0.8C herein may be equal to about 150×soh, where SOH is as defined in the prior art, and is a characteristic parameter of battery life degradation, such as battery capacity degradation to 80% of the initial value, and after battery performance degradation, the maximum current at the corresponding charging, i.e. 0.8C, is also synchronously adjusted to ensure the charging safety of the battery in the whole life cycle.
It will be appreciated that at T Battery min When the temperature is more than or equal to 15 ℃, although the heating relay is disconnected, the charging current is larger at the moment, and the battery module can generate heat, so that the temperature of the battery module can be continuously increased; after low temperature charging is completed, i.e. T Battery min And when the temperature is more than or equal to 45 ℃, the normal-temperature charging stage is started until the charging is completed, and as the focus of the application is the low-temperature charging control strategy of the power battery, the control strategy of the normal-temperature charging stage is not described in detail, and a constant-current charging mode for limiting the charging current value can be preferably adopted in the normal-temperature charging stage, and the current request value at the moment can be 0.33 ℃ or less, so that the temperature of the battery module is not too high. In consideration of the accuracy of the temperature sensor, when the temperature fluctuates, a transient jump of the temperature occurs to a certain temperature node, and therefore, the strategy may not be adjusted within a certain range of the temperature node, such as 5 ℃, 15 ℃, 45 ℃, which may be set according to the accuracy of the temperature sensor, and if the detection accuracy of the temperature sensor is 1 ℃, the certain range may be 1 ℃, that is, the temperature node floats within 1 ℃, and the control strategy is not adjusted.
Preferably, after the required current request value is obtained by the method, the current request value sent by the battery management system to the charging pile starts from 0A, and then increases by a certain value according to a certain period, such as increasing by 2A every 1 second, until the required current request value is reached.
Specifically, when T Battery min And when the temperature is more than or equal to 1 ℃, the battery management system firstly closes the main negative relay 23 and the pre-charging relay 42, and after the pre-charging is completed, the main positive relay 13 is closed again, and after the first set time is delayed, the pre-charging relay is opened.
The first set time is 80 to 120 milliseconds, and may preferably be 100 milliseconds.
Fig. 1 is an electrical schematic diagram provided in an embodiment of the present invention, in which a dc charging interface 73 is used for being plugged with a high voltage end of a dc charging socket, a current of a charging pile flows into a vehicle end charging socket from a charging gun head, and then flows into the dc charging interface through a charging socket high voltage line, and when the charging is performed, the current is connected into a high voltage distribution box (PDU for short); the air conditioner AC relay 81 is a relay for controlling high-voltage power supply of the electric air conditioner compressor; the battery pack is designed into a single-pack structure, and PDU (power distribution unit) is integrated in the pack, and the single-pack structure comprises electric components such as a main positive relay, a main negative relay, a pre-charging resistor, a current sensor, MSD (multiple-phase detector), a battery heating film, a heating relay and the like; the PDU has therein a main circuit fuse 61 (the overcurrent value thereof is generally designed to be 400A or more), a motor controller 62, a quick charge relay 71, a quick charge fuse 72, an air conditioner AC relay 81 and an AC relay fuse 82, a DCDC relay 91 and a DCDC relay fuse 92, a DCDC module 93, and the like; the first interface 83 is used for connecting an air conditioner AC, and the second interface 94 is used for connecting a DCDC.
The electrical principle is as above, and the designed up-down current process of the whole car is as follows:
after the gun is inserted, the charging pile is electrified in a low-voltage auxiliary mode, a battery management system (BMS for short) and a vehicle control unit (VCU for short) are activated, and the BMS detects the CC gun inserting state and the adhesion state of a main positive relay, a main negative relay, a pre-charging relay and a heating relay and reports the state to the VCU in a CAN message mode; after the VCU is activated, the self-checking does not have the fault that the electrification is not allowed, the BMS is confirmed to request the quick electrification through receiving a CC gun inserting signal (namely a direct current charging gun inserting detection signal), a relay state and a charging request signal which are reported by the BMS, then the BMS sends a high-voltage request to the BMS, after the BMS receives the electrification request, the main negative relay and the pre-charging relay are firstly closed, after the pre-charging is completed, the main positive relay is closed, the pre-charging relay is opened after 100ms is delayed, and the electrification completion signal is reported to the VCU. And when the BMS automatic control relay is closed, the handshake with the charging pile and the parameter configuration stage are completed, and the vehicle end is set to be not ready. The VCU receives the high-voltage power-on completion reported by the BMS, and then continuously receives A+ wake-up (namely, the direct-current charging pile outputs 12+ voltage through A+ at the moment and is used for activating a vehicle-end controller), CC gun inserting signals, sends a charging permission instruction, the BMS recognizes that charging is permitted, completes vehicle-end charging preparation, sends a quick charging relay closing request to PDU (protocol data unit), and performs information interaction parameter configuration with the charging pile, and starts processes such as charging.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, and that various changes and modifications may be made by one skilled in the art after reading the present disclosure, and the equivalent forms thereof fall within the scope of the appended claims.
Claims (8)
1. The power battery charging system is characterized by comprising a battery management system and a charging and discharging circuit arranged in the power battery system, wherein the charging and discharging circuit comprises a first circuit, a second circuit and a heating circuit, two ends of the first circuit are respectively connected with the positive electrode of the power battery module and the total positive electrode of the power battery system, and two ends of the second circuit are respectively connected with the negative electrode of the power battery module and the total negative electrode of the power battery system; the first circuit is sequentially provided with a maintenance switch and a main positive relay, and the second circuit is sequentially provided with a current sensor and a main negative relay; one end of the heating circuit is connected with the first circuit between the maintenance switch and the main positive relay, the other end of the heating circuit is connected with the second circuit between the total negative electrode and the main negative relay, and the heating circuit is provided with a battery heating film and a heating relay; the main positive relay, the main negative relay and the heating relay are respectively and electrically connected with the battery management system.
2. The power battery charging system according to claim 1, further comprising a pre-charging circuit, wherein both ends of the pre-charging circuit are respectively connected to the first circuits at both ends of the main positive relay, a pre-charging relay and a pre-charging resistor are arranged in series on the pre-charging circuit, and the pre-charging relay is electrically connected to the battery management system.
3. The power battery charging system of claim 1, wherein the current sensor is a hall current sensor.
4. A power cell low temperature charge control strategy, comprising:
when the battery management system recognizes T Battery min When the temperature is less than or equal to 0 ℃, the heating relay is controlled to be closed, so that the power battery system enters a low-temperature heating stage, and the battery heating film is heated by utilizing the current input by the charging pile; when the current sensor detects that the second circuit has current, the battery management system controls the main negative relay to be disconnected so as to ensure that the current output by the charging pile only flows into the battery heating film until T Battery min Raising the temperature to 1 ℃;
when T is identified Battery min When the temperature is more than or equal to 1 ℃, the battery management system controls the main negative relay to be closed, and the battery management system enters a heating stage while charging at a low temperature;
when T is Battery min When the temperature is more than or equal to 15 ℃, the battery management system controls the heating relay to be disconnected, the battery management system enters a low-temperature charging stage, and only the power battery module is charged until T Battery min And (5) reaching 45 ℃ to finish low-temperature charging.
5. The low temperature charge control strategy of claim 4, wherein during the low temperature heating phase, the battery management system requests the charging post to perform constant current power supply, and the current request value sent by the battery management system to the charging post is the power/current voltage of the battery heating film.
6. The low temperature charge control strategy of claim 5, wherein during the low temperature charge while heating phase, when at 5 °c>T Battery min When the temperature is more than or equal to 1 ℃, the current request value is 0.1C+the power/current voltage of the battery heating film, wherein C is the charging power value of the power battery module for 1 h; when 15 DEG C>T Battery min And when the temperature is more than or equal to 5 ℃, the current request value of the battery management system is 0.25 C+the power/current voltage of the battery heating film.
7. The low temperature charge control strategy of a power cell of claim 6, wherein at 45 degrees c>T Battery min And when the temperature is more than or equal to 15 ℃, the current request value of the battery management system is 0.8 ℃.
8. The power cell low temperature charge control strategy of claim 6, wherein when T Battery min And when the temperature is more than or equal to 1 ℃, the battery management system firstly closes the main negative relay and the pre-charging relay, and after the pre-charging is completed, the main positive relay is closed again, and after the first set time is delayed, the pre-charging relay is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310222283.3A CN116142015A (en) | 2023-03-09 | 2023-03-09 | Power battery charging system and low-temperature charging control strategy thereof |
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| CN202310222283.3A CN116142015A (en) | 2023-03-09 | 2023-03-09 | Power battery charging system and low-temperature charging control strategy thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117429285A (en) * | 2023-12-18 | 2024-01-23 | 宁波均胜新能源研究院有限公司 | Power battery charging circuit and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117429285A (en) * | 2023-12-18 | 2024-01-23 | 宁波均胜新能源研究院有限公司 | Power battery charging circuit and control method thereof |
| CN117429285B (en) * | 2023-12-18 | 2024-03-26 | 宁波均胜新能源研究院有限公司 | Power battery charging circuit and control method thereof |
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