CN117698516A - Heating method and device for power battery, vehicle and storage medium - Google Patents
Heating method and device for power battery, vehicle and storage medium Download PDFInfo
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- CN117698516A CN117698516A CN202311672961.2A CN202311672961A CN117698516A CN 117698516 A CN117698516 A CN 117698516A CN 202311672961 A CN202311672961 A CN 202311672961A CN 117698516 A CN117698516 A CN 117698516A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 152
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000446 fuel Substances 0.000 claims abstract description 40
- 238000004590 computer program Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 description 13
- 238000004891 communication Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 7
- 238000011217 control strategy Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The application relates to the technical field of fuel electric automobiles, in particular to a heating method and device of a power battery, a vehicle and a storage medium, wherein the method comprises the following steps: identifying a current temperature of the power cell; acquiring a heating closing threshold of the power battery and the lowest temperature of the fuel battery when the power battery is allowed to be charged at rated power, and determining a target temperature of heating the power battery based on the heating closing threshold and the lowest temperature; and heating the power battery until the current temperature reaches the target temperature. Therefore, the problems that the heating mode of the power battery is simpler, the charge and discharge performance of the power battery under the low temperature condition cannot be fully exerted, the power performance of the fuel battery automobile under the low temperature condition is poor, the user experience is poor and the like are solved.
Description
Technical Field
The present disclosure relates to the field of fuel electric vehicles, and in particular, to a heating method and apparatus for a power battery, a vehicle, and a storage medium.
Background
Fuel cell vehicles generally include a fuel cell and a power cell, the power cell is charged by the fuel cell, and the power cell is used to power the entire vehicle, so it is important how to ensure the charge and discharge performance of the power cell.
The activity of active substances in the lithium ion battery is obviously reduced in the low-temperature charge and discharge process of the power battery, so that the charge and discharge performance of the power battery is seriously attenuated and the reaction speed is slow. Therefore, during low temperature use of the fuel cell vehicle, the power cell needs to be heated.
However, in the related art, heating is realized by a heating start threshold and a heating close threshold based on the power battery, a heating control strategy is simple, and the charge and discharge performance of the power battery under the low temperature condition cannot be fully exerted, so that the power performance of the fuel battery vehicle under the low temperature condition is poor, the user experience is poor, and the problem needs to be solved.
Disclosure of Invention
The application provides a heating method, a heating device, a vehicle and a storage medium of a power battery, which are used for solving the problems that in the related art, the heating mode of the power battery is simpler, the charge and discharge performance of the power battery under the low-temperature condition can not be fully exerted, the power performance of a fuel battery automobile under the low-temperature condition is poor, the user experience is poor and the like.
An embodiment of a first aspect of the present application provides a heating method for a power battery, including the steps of: identifying a current temperature of the power cell; acquiring a heating shutdown threshold of the power battery and a minimum temperature of the fuel battery when the power battery is allowed to be charged at rated power, and determining a target temperature of heating of the power battery based on the heating shutdown threshold and the minimum temperature; and heating the power battery until the current temperature reaches the target temperature.
Optionally, the heating the power battery further includes: determining the maximum allowable discharge power of the power battery according to the current temperature; and heating the power battery based on the maximum discharge power.
Optionally, the determining the target temperature of the power battery heating based on the heating off threshold and the minimum temperature includes: and taking the larger value of the heating-off threshold value and the lowest temperature as the target temperature.
Optionally, before heating the power battery, the method further comprises: acquiring a heating start threshold of the power battery; and if the current temperature is smaller than the heating start threshold, heating the power battery.
Optionally, after heating the power battery, the method further comprises: and generating a low-temperature heating prompt of the power battery.
An embodiment of a second aspect of the present application provides a heating device for a power battery, including: the identification module is used for identifying the current temperature of the power battery; an acquisition module for acquiring a heating shutdown threshold of the power battery and a minimum temperature at which the fuel cell allows the power battery to be charged at rated power, and determining a target temperature at which the power battery is heated based on the heating shutdown threshold and the minimum temperature; and the heating module is used for heating the power battery until the current temperature reaches the target temperature.
Optionally, the heating module is further configured to: determining the maximum allowable discharge power of the power battery according to the current temperature; and heating the power battery based on the maximum discharge power.
Optionally, the acquiring module is further configured to: and taking the larger value of the heating-off threshold value and the lowest temperature as the target temperature.
Optionally, the heating module is further configured to: acquiring a heating start threshold of the power battery; and if the current temperature is smaller than the heating start threshold, heating the power battery.
Optionally, the heating module is further configured to: and generating a low-temperature heating prompt of the power battery.
An embodiment of a third aspect of the present application provides a vehicle, including: the heating device comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to realize the heating method of the power battery according to the embodiment.
An embodiment of the fourth aspect of the present application provides a computer-readable storage medium having stored thereon a computer program that is executed by a processor for implementing the heating method of a power battery as described in the above embodiment.
Therefore, the application has at least the following beneficial effects:
according to the embodiment of the application, the heating target temperature of the power battery can be determined together based on the heating closing threshold value of the power battery capable of normally discharging and the charging temperature capable of being charged better, so that the heating of the power battery under the low-temperature condition is realized, the charging and discharging influence of the temperature on the power battery is fully considered when the power battery is heated under the low temperature, the charging and discharging requirements can be considered, the low-temperature charging and discharging performance of the power battery is effectively improved, the power performance of a fuel battery vehicle under the low-temperature condition is improved, and the use experience of a user is improved.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a flowchart of a heating method of a power battery according to an embodiment of the present application;
fig. 2 is a flow chart of low-temperature heating of a fuel electric vehicle according to an embodiment of the present application;
fig. 3 is a block diagram of a heating device for a power battery according to an embodiment of the present application;
fig. 4 is a schematic structural view of a vehicle according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
The following describes a heating method, a heating device, a vehicle, and a storage medium of a power battery according to an embodiment of the present application with reference to the accompanying drawings. Aiming at the problems that the heating mode of the power battery mentioned in the background art is simpler, the charge and discharge performance of the power battery under the low-temperature condition can not be fully exerted, the power performance of the fuel battery automobile under the low-temperature condition is poor, and the user experience is poor, the application provides a heating method of the power battery, in the method, the heating target temperature of the power battery can be jointly determined based on the heating closing threshold value of the power battery capable of normally discharging and the charging temperature capable of being charged better, the heating of the power battery under the low-temperature condition is realized, the charge and discharge influence of the temperature on the power battery is fully considered during the low-temperature heating of the power battery, the charge and discharge requirements can be considered, the low-temperature charge and discharge performance of the power battery is effectively improved, the power performance of the fuel battery automobile under the low-temperature condition is further improved, and the use experience of the user is improved. Therefore, the problems that the heating mode of the power battery is simpler, the charge and discharge performance of the power battery under the low temperature condition cannot be fully exerted, the power performance of the fuel battery automobile under the low temperature condition is poor, the user experience is poor and the like are solved.
Specifically, fig. 1 is a schematic flow chart of a heating method of a power battery according to an embodiment of the present application.
As shown in fig. 1, the heating method of the power battery includes the steps of:
in step S101, the current temperature of the power battery is identified.
It can be understood that in the embodiment of the application, the current temperature of the power battery can be detected by a temperature sensor or the like, and the current temperature of the power battery is associated with the actual working condition of the power battery, wherein the influence of the ambient temperature on the current temperature of the power battery is the greatest, and if the current actual ambient temperature is lower, the current temperature of the power battery is also reduced.
In step S102, a heating-off threshold of the power cell and a minimum temperature at which the fuel cell allows the power cell to be charged at rated power are acquired, and a target temperature at which the power cell is heated is determined based on the heating-off threshold and the minimum temperature.
The heating-off threshold may be set according to different vehicle types and actual types of the power battery, for example, may be set to 20 ℃ or 15 ℃, and is not particularly limited.
It can be understood that when the heating off threshold is reached, it means that the power battery can be normally discharged, and the effect of the discharge on the power battery is small; the fuel cell allows the lowest temperature when the power cell is charged at rated power, and it can be understood that the power cell can allow the fuel cell to charge at rated power when the power cell is at the lowest temperature or above, and the power charging at the moment can not cause damage to the power cell, so that the power cell can be effectively protected, and the service life of the power cell is prolonged.
The power battery heating strategy needs to consider that the temperature of the power battery is generally lower when the electric pile is cold started, and in order to ensure that the battery is continuously heated to the battery core temperature when the rated power of the fuel battery corresponds to the maximum allowable charging of the power battery, and simultaneously ensure good dynamic property of the whole automobile, the battery is continuously heated to achieve the aim of quickly recovering dynamic property, and not only the allowable discharging temperature range of the battery of the power battery per se but also the current allowable chargeable power battery core temperature of the power battery during cold starting of the automobile are considered.
From this, this application embodiment can be based on the heating that power battery can normally discharge closes threshold value and can the better charge temperature that charges, confirm power battery's heating target temperature jointly, realize the heating of power battery under the low temperature condition to fully consider the temperature when power battery low temperature heats the charge and discharge influence to power battery, can take into account the charge and discharge demand, effectively promote power battery's low temperature charge and discharge performance, and then promote fuel cell vehicle's dynamic performance under the low temperature condition, promote user's use experience.
In an embodiment of the present application, determining a target temperature for heating of the power cell based on the heating off threshold and the minimum temperature includes: the larger of the heating-off threshold and the lowest temperature is taken as the target temperature.
It can be understood that, in the embodiment of the application, the heating shutdown threshold is compared with the value of the lowest temperature of the fuel cell when the power cell is allowed to be charged with rated power, and the larger value is taken as the target temperature, so that the low-temperature starting performance of the fuel electric vehicle is improved.
In step S103, the power battery is heated until the current temperature reaches the target temperature.
It can be appreciated that, in the embodiment of the application, the power battery is continuously heated until the current temperature reaches the target temperature, so that the purpose of quickly recovering the dynamic property is achieved, quick starting in a short time is realized, and the low-temperature starting performance of the fuel electric vehicle is improved.
In this embodiment of the present application, before heating the power battery, the method further includes: acquiring a heating start threshold of the power battery; and if the current temperature is less than the heating start threshold, heating the power battery.
The heating-on threshold may be set according to actual situations, for example: the heating-on threshold is 0 ℃ or-10 ℃, and is not particularly limited.
It can be understood that when the current temperature of the power battery is detected to be smaller than the heating start threshold, the power battery is heated, so that the power battery can quickly recover the power performance, and the vehicle can be started in a short time.
In an embodiment of the present application, heating the power battery further includes: determining the maximum allowable discharge power of the power battery according to the current temperature; the power cell is heated based on the maximum discharge power.
It can be understood that, according to the embodiment of the application, the maximum allowable discharge power of the power battery is determined according to the current temperature, so that the heating relay is controlled to be closed according to the maximum discharge power to heat the power battery, the heating function is guaranteed to be executed in a state that the power battery can be discharged, the power performance of the power battery is quickly recovered, and the vehicle is guaranteed to be started in a short time.
In an embodiment of the present application, after heating the power battery, the method further includes: generating a low-temperature heating prompt of the power battery.
It can be appreciated that the application generates a low temperature heating prompt for the power battery after heating the power battery to remind the driver that the power battery is in a heating state currently.
According to the heating method of the power battery, which is provided by the embodiment of the application, the heating target temperature of the power battery can be determined together based on the heating closing threshold value of the power battery capable of normally discharging and the charging temperature capable of being charged better, so that the heating of the power battery under the low-temperature condition is realized, the influence of the temperature on the charging and discharging of the power battery is fully considered when the power battery is heated at the low temperature, the charging and discharging requirements can be considered, the low-temperature charging and discharging performance of the power battery is effectively improved, the power performance of a fuel battery vehicle under the low-temperature condition is further improved, and the use experience of a user is improved.
The heating method of the power battery proposed in the present application will be described in detail with reference to fig. 2, specifically as follows:
the power control system mainly comprises a FCU (Fuel-cell Control Unit, fuel cell control module), a VCU (Vehicle control unit, vehicle controller module) and a BMS (Battery Management System, power battery), wherein the FCU function detects signals such as ambient temperature, fuel engine water temperature and the like and responds to power requested by the VCU according to a starting control strategy; the VCU detects the running state of the vehicle and judges the chargeable allowable power of the power battery at the current battery core temperature; the BMS detects the temperature of the battery cell and requests to start and shut down the heating of the power battery.
The low-temperature environment of the fuel cell electric automobile is started, the power battery firstly enters a driving heating process, and the vehicle detects the current of the power battery in real time through a temperature sensorJudging whether the current temperature meets the low-temperature heating condition, and when the current temperature of the power battery is lower than a set heating starting threshold T 1 When the BMS executes a driving heating process, the temperature of the power battery gradually rises along with the heating of the power battery, the heating closing threshold of the power battery and the lowest temperature of the fuel battery when the fuel battery is allowed to charge the power battery with rated power need to be obtained in the process, and when the current temperature of the power battery reaches the set closing threshold T 2 And the rated power of the fuel cell corresponds to the maximum allowable charging temperature T of the power cell 0 ＜T 2 The BMS executes the shutdown heating process if the rated power of the fuel cell corresponds to the maximum allowable charging temperature T of the power cell 0 ＞T 2 The power battery is continuously heated to T 0 When the current temperature of the power battery reaches T 0 When the BMS performs the off heating process.
In summary, the embodiment of the application mainly develops a functional strategy by combining the low-temperature heating strategy of the power battery with the low-temperature starting performance of the hydrogen fuel engine, so that the low-temperature heating performance of the battery is ensured, the charging power allowed by the battery when the fuel battery is started at low temperature is ensured, and on the basis of the framework of the original fuel electric automobile, no additional component is needed, and the control strategy function is realized only by a CAN (Controller Area Network, controller area network bus) bus.
Next, a heating device of a power battery according to an embodiment of the present application will be described with reference to the accompanying drawings.
Fig. 3 is a block schematic diagram of a heating device of a power cell according to an embodiment of the present application.
As shown in fig. 3, the heating device 10 of the power battery includes: an identification module 100, an acquisition module 200, and a heating module 300.
Wherein, the identification module 100 is used for identifying the current temperature of the power battery; the acquisition module 200 is configured to acquire a heating shutdown threshold of the power battery and a minimum temperature at which the fuel cell allows the power battery to be charged at a rated power, and determine a target temperature at which the power battery is heated based on the heating shutdown threshold and the minimum temperature; the heating module 300 is used to heat the power cell until the current temperature reaches the target temperature.
In an embodiment of the present application, the heating module is further configured to: determining the maximum allowable discharge power of the power battery according to the current temperature; the power cell is heated based on the maximum discharge power.
In an embodiment of the present application, the obtaining module is further configured to: the larger of the heating-off threshold and the lowest temperature is taken as the target temperature.
In an embodiment of the present application, the heating module is further configured to: acquiring a heating start threshold of the power battery; and if the current temperature is less than the heating start threshold, heating the power battery.
In an embodiment of the present application, the heating module is further configured to: generating a low-temperature heating prompt of the power battery.
It should be noted that the foregoing explanation of the heating method embodiment of the power battery is also applicable to the heating device of the power battery of this embodiment, and will not be repeated here.
According to the heating device of the power battery, the heating target temperature of the power battery can be determined together based on the heating closing threshold value that the power battery can normally discharge and the charging temperature that the power battery can be charged better, so that the heating of the power battery under the low-temperature condition is realized, the charging and discharging influence of the temperature on the power battery is fully considered when the power battery is heated at the low temperature, the charging and discharging requirements can be considered, the low-temperature charging and discharging performance of the power battery is effectively improved, the power performance of a fuel battery vehicle under the low-temperature condition is improved, and the use experience of a user is improved.
Fig. 4 is a schematic structural diagram of a vehicle according to an embodiment of the present application. The vehicle may include:
memory 401, processor 402, and a computer program stored on memory 401 and executable on processor 402.
The processor 402 implements the heating method of the power battery provided in the above-described embodiment when executing the program.
Further, the vehicle further includes:
a communication interface 403 for communication between the memory 401 and the processor 402.
A memory 401 for storing a computer program executable on the processor 402.
The memory 401 may include high speed RAM (Random Access Memory ) memory, and may also include non-volatile memory, such as at least one disk memory.
If the memory 401, the processor 402, and the communication interface 403 are implemented independently, the communication interface 403, the memory 401, and the processor 402 may be connected to each other by a bus and perform communication with each other. The bus may be an ISA (Industry Standard Architecture ) bus, a PCI (Peripheral Component, external device interconnect) bus, or EISA (Extended Industry Standard Architecture ) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 4, but not only one bus or one type of bus.
Alternatively, in a specific implementation, if the memory 401, the processor 402, and the communication interface 403 are integrated on a chip, the memory 401, the processor 402, and the communication interface 403 may perform communication with each other through internal interfaces.
The processor 402 may be a CPU (Central Processing Unit ) or ASIC (Application Specific Integrated Circuit, application specific integrated circuit) or one or more integrated circuits configured to implement embodiments of the present application.
The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the heating method of the power battery as above.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "N" is at least two, such as two, three, etc., unless explicitly defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with another embodiment, if implemented in hardware, may be implemented with a combination of any one or more of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable gate arrays, field programmable gate arrays, and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (10)
1. A method of heating a power cell, comprising the steps of:
identifying a current temperature of the power cell;
acquiring a heating shutdown threshold of the power battery and a minimum temperature of the fuel battery when the power battery is allowed to be charged at rated power, and determining a target temperature of heating of the power battery based on the heating shutdown threshold and the minimum temperature;
and heating the power battery until the current temperature reaches the target temperature.
2. The method of heating a power cell of claim 1, wherein said heating the power cell further comprises:
determining the maximum allowable discharge power of the power battery according to the current temperature;
and heating the power battery based on the maximum discharge power.
3. The method of heating a power cell according to claim 1, wherein the determining a target temperature for heating the power cell based on the heating-off threshold and the minimum temperature includes:
and taking the larger value of the heating-off threshold value and the lowest temperature as the target temperature.
4. The method of heating a power cell of claim 1, further comprising, prior to heating the power cell:
acquiring a heating start threshold of the power battery;
and if the current temperature is smaller than the heating start threshold, heating the power battery.
5. The method of heating a power cell according to claim 1, further comprising, after heating the power cell:
and generating a low-temperature heating prompt of the power battery.
6. A heating device for a power cell, comprising:
the identification module is used for identifying the current temperature of the power battery;
an acquisition module for acquiring a heating shutdown threshold of the power battery and a minimum temperature at which the fuel cell allows the power battery to be charged at rated power, and determining a target temperature at which the power battery is heated based on the heating shutdown threshold and the minimum temperature;
and the heating module is used for heating the power battery until the current temperature reaches the target temperature.
7. The heating device of a power cell of claim 6, wherein the heating module is further configured to:
determining the maximum allowable discharge power of the power battery according to the current temperature;
and heating the power battery based on the maximum discharge power.
8. The power cell heating apparatus of claim 6, wherein the acquisition module is further configured to:
and taking the larger value of the heating-off threshold value and the lowest temperature as the target temperature.
9. A vehicle, characterized by comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the method of heating a power cell as claimed in any one of claims 1 to 5.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the program is executed by a processor for realizing the heating method of a power cell as claimed in any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311672961.2A CN117698516A (en) | 2023-12-07 | 2023-12-07 | Heating method and device for power battery, vehicle and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311672961.2A CN117698516A (en) | 2023-12-07 | 2023-12-07 | Heating method and device for power battery, vehicle and storage medium |
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| CN117698516A true CN117698516A (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311672961.2A Pending CN117698516A (en) | 2023-12-07 | 2023-12-07 | Heating method and device for power battery, vehicle and storage medium |
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| CN (1) | CN117698516A (en) |
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