A power conversion method and device between power batteries

Abstract

The application provides a power conversion method and device between power batteries. In the method, first SOC information of a first power battery determined by a first SOC determination method and second SOC information of a second power battery determined by a second SOC determination method are obtained; the first SOC information is converted based on the second SOC information to obtain SOC conversion information of the first power battery under the second SOC determination method; a SOC correlation between the first power battery and the second power battery under the second SOC determination method is determined based on the SOC conversion information and the second SOC information; and the power value in the original power MAP of the first power battery is converted based on the SOC correlation to obtain a new power MAP. The method realizes power conversion of power batteries with different SOC determination methods and ensures stable operation of the whole vehicle.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and more specifically, to a power conversion method and apparatus between power batteries. Background Technology

[0002] In the new energy power battery industry, the power battery is the main energy source for new energy vehicles, and its power directly determines the acceleration performance and hill-climbing ability of electric vehicles. Therefore, current power battery power design always considers maximizing the power capacity of the battery itself. However, since the power usage of the power battery is generally determined based on the estimated state of charge (SOC) of the battery, current maximum power design work usually needs to consider whether the correspondence between the designed SOC and power is accurate.

[0003] However, in current design work, how to convert the power of the power battery under different SOC determination methods has affected the power utilization of the power battery. Summary of the Invention

[0004] The purpose of this application is to provide a power conversion method and apparatus between power batteries, which solves the above-mentioned problems existing in the prior art, realizes the power conversion of power batteries with different SOC determination methods, and thus determines whether the whole vehicle can maintain stable operation.

[0005] Firstly, a power conversion method between power batteries is provided, which may include:

[0006] The first SOC information of the first power battery determined by the first SOC determination method and the second SOC information of the second power battery determined by the second SOC determination method are obtained respectively; wherein, the SOC information includes the SOC of the corresponding power battery at each temperature point;

[0007] Based on the second SOC information, the first SOC information is converted to obtain the SOC conversion information of the first power battery under the second SOC determination method; the SOC conversion information includes the new SOC corresponding to each temperature point;

[0008] Based on the SOC conversion information and the second SOC information, the SOC association relationship between the first power battery and the second power battery under the second SOC determination method is determined;

[0009] Using the SOC correlation, the power values ​​in the original power MAP of the first power battery are converted to obtain a new power MAP.

[0010] In an optional implementation, the first SOC information determined by the first power battery using a first SOC determination method and the second SOC information determined by the second power battery using a second SOC determination method are obtained, including:

[0011] According to the preset SOC capacity, the SOC capacity of the first power battery and the second power battery are adjusted according to the first SOC determination method and the second SOC determination method respectively, so as to obtain the SOC of the first power battery and the second power battery at different temperature points respectively.

[0012] The SOC of the first power battery at different temperature points is determined as the first SOC information, and the SOC of the second power battery at different temperature points is determined as the second SOC information.

[0013] In an optional implementation, based on the SOC conversion information and the second SOC information, the SOC association relationship between the first power battery and the second power battery under the second SOC determination method is determined, including:

[0014] Based on the SOC conversion information and the second SOC information, the zero SOC offset between the zero SOC of the first power battery at each temperature point and the zero SOC of the second power battery at the corresponding temperature point is determined under the second SOC determination method.

[0015] The SOC correlation is determined based on the zero SOC offset corresponding to each temperature point.

[0016] In an optional implementation, the SOC association is expressed as: SOC(Y) = SOC(X) * (100% - P%) + P%;

[0017] Wherein, SOC(X) is the new SOC of the first power battery at any temperature point in the SOC conversion information, SOC(Y) is the converted SOC of the first power battery at the temperature point, and P% is the zero SOC offset at the temperature point.

[0018] In an optional implementation, the power values ​​in the original power MAP of the first power battery are converted using the SOC association relationship to obtain a new power MAP, including:

[0019] Using the SOC correlation, the power values ​​of different SOCs at different temperatures in the original power MAP of the first power battery are converted to obtain a new power MAP.

[0020] In one optional implementation, the SOC determination method includes determining each SOC state by adjusting the SOC based on the capacity at room temperature, and determining each SOC state by adjusting the SOC based on the capacity at a specific temperature.

[0021] Secondly, a power conversion device between power batteries is provided, the device may include:

[0022] The acquisition unit is used to acquire the first SOC information of the first power battery determined by the first SOC determination method, and the second SOC information of the second power battery determined by the second SOC determination method; wherein, the SOC information includes the SOC of the corresponding power battery at each temperature point;

[0023] The conversion unit is used to perform SOC conversion on the first SOC information based on the second SOC information to obtain the SOC conversion information of the first power battery under the second SOC determination method; the SOC conversion information includes the new SOC corresponding to each temperature point;

[0024] The determining unit is used to determine the SOC association relationship between the first power battery and the second power battery under the second SOC determining method based on the SOC conversion information and the second SOC information.

[0025] The conversion unit is further configured to use the SOC correlation to convert the power value in the original power MAP of the first power battery to obtain a new power MAP.

[0026] In an optional implementation, the determining unit is specifically used to: determine the zero SOC offset between the zero SOC of the first power battery at each temperature point and the zero SOC of the second power battery at the corresponding temperature point under the second SOC determining method, based on the SOC conversion information and the second SOC information.

[0027] The SOC correlation is determined based on the zero SOC offset corresponding to each temperature point.

[0028] Thirdly, an electronic device is provided, which includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0029] Memory, used to store computer programs;

[0030] When a processor executes a program stored in memory, it implements any of the steps described in the first aspect above.

[0031] Fourthly, a computer-readable storage medium is provided, wherein a computer program is stored therein, and when executed by a processor, the computer program implements the steps of any of the methods described in the first aspect above.

[0032] The power conversion method between power batteries provided in this application requires first obtaining the first SOC information of the first power battery determined by a first SOC determination method, and the second SOC information of the second power battery determined by a second SOC determination method. The SOC information includes the SOC of the corresponding power battery at each temperature point. Then, based on the second SOC information, the first SOC information is converted to obtain the SOC conversion information of the first power battery under the second SOC determination method. The SOC conversion information includes the new SOC corresponding to each temperature point. Based on the SOC conversion information and the second SOC information, the SOC association between the first and second power batteries under the second SOC determination method is determined. Using the SOC association, the power values ​​in the original power MAP of the first power battery are converted to obtain a new power MAP. This method realizes power conversion between power batteries using different SOC determination methods. After a unified conversion based on the SOC determination method, it achieves rapid power matching and confirmation, reduces development costs and personnel investment, shortens the development cycle, and ensures the conformity of power capabilities, thereby ensuring the stable operation of the entire vehicle. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic flowchart illustrating a power conversion method between power batteries provided in an embodiment of this application;

[0035] Figure 2 This application provides a schematic diagram of the SOC versus temperature curve for battery A under the SOC determination method for battery B, as shown in the embodiments of this application.

[0036] Figure 3 This is a schematic diagram of the structure of a power conversion device between power batteries provided in an embodiment of this application;

[0037] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0039] With the development of various power battery technologies, the application of electric vehicles is becoming increasingly widespread. The improvements in power performance and driving range of electric vehicles are becoming more and more significant, thus placing higher demands on the peak discharge power and peak regenerative power of the vehicle's power battery. The power MAP of a power battery records the power output under different temperature conditions and different battery states of charge (SOC) conditions.

[0040] During the pulse charging or discharging of batteries in a vehicle, existing technology uses a Battery Management System (BMS) to send a single power map to adjust the battery's power usage. On one hand, during discharge, as time increases, using a power map that is incompatible with the current battery condition may frequently trigger undervoltage faults due to excessive power usage, leading to power reduction due to undervoltage protection, affecting the vehicle's power or damaging battery performance due to over-discharge. On the other hand, during charging, as time increases, using a power map that is incompatible with the current battery condition may frequently trigger overvoltage faults due to excessive power usage, leading to power reduction due to overvoltage protection, affecting the vehicle's power or damaging battery performance due to overcharging. Furthermore, when the battery has the capacity to use high power, a single low-power map can also affect the vehicle's performance. Therefore, it is necessary to convert the corresponding power map for different power batteries.

[0041] Therefore, this application provides a power conversion method between power batteries in the power design work of power batteries. This method can be applied in servers, terminals, or systems built with servers and terminals. The server can be a physical server, a server cluster composed of multiple physical servers, or a distributed system. It can also be a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (CDNs), and big data and artificial intelligence platforms. The terminal can be user equipment (UE) such as mobile phones, smartphones, laptops, digital radio receivers, personal digital assistants (PDAs), and tablet computers (PADs), handheld devices, in-vehicle devices, wearable devices, computing devices or other processing devices connected to wireless modems, mobile stations (MS), and mobile terminals.

[0042] In the power design of power batteries, if the current power battery in the battery management system is type B, and the goal is to replace it with type A, the current battery management system cannot simply replace the battery and start working directly because the State of Charge (SOC) determination methods for type B and type A are different. It is necessary to readjust the power capability of type A battery to ensure the current battery management system functions properly. Specifically, the power conversion method between power batteries provided in this application allows for rapid switching of power capabilities between two power batteries with different SOC determination methods within the same design project. This ensures a unified conversion of the SOC determination method, achieving rapid power matching and confirmation, reducing development costs and personnel investment, shortening the development cycle, and guaranteeing power capability compliance, thereby ensuring stable operation of the entire vehicle.

[0043] Furthermore, since power capability is generally obtained through testing, it is necessary to clarify the specific determination method of the SOC of the power capability before power switching. Therefore, the power conversion method of this application can include the conversion of the correspondence between the SOC determination method and the conversion of the power capability, i.e., power conversion.

[0044] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application. Furthermore, the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0045] Figure 1This is a schematic flowchart illustrating a power conversion method between power batteries provided in an embodiment of this application. Figure 1 As shown, the method may include:

[0046] Step S110: Obtain the first SOC information determined by the first power battery using the first SOC determination method, and the second SOC information determined by the second power battery using the second SOC determination method.

[0047] The SOC information can include the SOC of the corresponding power battery at various temperature points. Since different SOC capacities of the power battery correspond to different SOC states, and different SOC states can reflect different power capabilities of the power battery, the SOC at each temperature point can be understood as either the SOC state or the SOC capacity. SOC determination methods can include adjusting the SOC based on the capacity at room temperature to determine each SOC state, and adjusting the SOC based on the capacity at a specific temperature to determine each SOC state.

[0048] Subsequently, the SOC capacities of the first power battery A and the second power battery B are adjusted according to the preset SOC capacity using the first SOC determination method and the second SOC determination method, respectively, to obtain the SOC of the first power battery A and the second power battery B at different temperature points. Specifically, the SOC adjustment method based on the capacity at room temperature means that the SOC determination method at each temperature is: to determine each SOC state by charging and discharging at every 5% of the standard capacity at room temperature (e.g., 5% SOC); the SOC adjustment method based on the capacity at a specific temperature means that the SOC determination method at each temperature is: to determine each SOC state by charging and discharging at every 5% of the capacity at each temperature.

[0049] Furthermore, by adjusting the SOC capacity of the power battery at preset SOC intervals, a linear relationship between the SOC capacity and different temperatures can be obtained. The acceptable range for the preset SOC capacity is 5-8% SOC, with 5% SOC being the preferred preset SOC capacity.

[0050] Subsequently, the SOC of the first power battery A at different temperature points is determined as the first SOC information, and the SOC of the second power battery B at different temperature points is determined as the second SOC information.

[0051] Step S120: Based on the second SOC information, perform SOC conversion on the first SOC information to obtain the SOC conversion information of the first power battery under the second SOC determination method.

[0052] The SOC conversion information can include the new SOC corresponding to each temperature point.

[0053] Based on the second SOC information, the first SOC information is converted to SOC, thereby converting the first SOC determination method of the first power battery A into the second SOC determination method of the second power battery, that is, obtaining the new SOC of the first power battery A at each temperature point under the second SOC determination method.

[0054] Step S130: Based on the SOC conversion information and the second SOC information, determine the SOC association between the first power battery and the second power battery under the second SOC determination method.

[0055] In specific implementation, based on SOC conversion information and second SOC information, the zero SOC offset between the zero SOC of the first power battery A at each temperature point and the zero SOC of the second power battery B at the corresponding temperature point is determined under the second SOC determination method.

[0056] The SOC correlation is determined based on the zero SOC offset corresponding to each temperature point.

[0057] In one implementation, the SOC relationship can be expressed as: SOC(Y) = SOC(X) * (100% - P%) + P%;

[0058] Wherein, SOC(X) is the new SOC of the first power battery A at any temperature point in the SOC conversion information, SOC(Y) is the converted SOC of the first power battery A at the corresponding temperature point, and P% is the zero SOC offset at that temperature point.

[0059] Step S140: Using the SOC correlation relationship, the power value in the original power MAP of the first power battery is converted to obtain a new power MAP.

[0060] By using the SOC correlation, the power values ​​of different SOCs at different temperatures in the original power MAP of the first power battery A are converted to obtain a new power MAP.

[0061] For example, when determining the low-temperature power of battery A, the SOC determination method is the same as the room temperature capacity determination method. When determining the low-temperature power of battery B, the SOC determination method is the low-temperature capacity determination method (that is, the SOC is adjusted according to the capacity at a specific temperature to determine each SOC state).

[0062] Assume that battery A has a capacity of Q1 at room temperature and Q2 at -20℃; battery B has a capacity of Q3 at room temperature and Q4 at -20℃.

[0063] Therefore, for the method of determining the SOC capacity at room temperature for battery A, adjusting the SOC to 0% at -20℃ corresponds to a discharge capacity of Q1, meaning that battery A is adjusted to 0% SOC at room temperature to discharge capacity Q1. For the method of determining the SOC for battery B, adjusting the SOC to 0% at -20℃ corresponds to a discharge capacity of Q4, meaning that battery B is adjusted to 0% SOC at -20℃ to discharge capacity Q4.

[0064] If the SOC determination method for battery A is converted to the SOC determination method for battery B, the SOC conversion information for battery A can be obtained.

[0065] The SOC conversion information includes the fact that the SOC of battery A corresponding to the 0% SOC of battery B at -20℃ is not 0%, but rather corresponds to 1-Q2 / Q1, which is the zero SOC offset corresponding to the low temperature of -20℃.

[0066] Similarly, the zero SOC offset of battery A at each temperature point can be determined using the same method as battery B for determining SOC. This means the 0% SOC position of battery A at each temperature point is determined, allowing the plotting of a linear curve. Figure 2 As shown.

[0067] After determining the 0% SOC position of battery A under the SOC determination method for battery B, the SOC range of battery A under the unified SOC determination method for battery B is: 1-Q2 / Q1~100% SOC corresponds to 0%~100% SOC of battery B. Combined with... Figure 2 It can be seen that at -20℃, 1-Q2 / Q1=20%, so the 20%~100% SOC of battery A corresponds to the 0%~100% SOC of battery B.

[0068] Based on the above SOC(Y)=SOC(X)*(100%-P%)+P%, it can be known that the power value corresponding to the original 5% SOC of battery A is the power value corresponding to SOC=5%*(100%-20%)+20%=24%. By analogy, the power value at different SOC and different temperatures is determined, thus completing the conversion of the entire power MAP.

[0069] Corresponding to the above method, embodiments of this application also provide a power conversion device between power batteries, such as... Figure 3 As shown, the device includes:

[0070] The acquisition unit 310 is used to acquire the first SOC information of the first power battery determined by the first SOC determination method, and the second SOC information of the second power battery determined by the second SOC determination method; wherein, the SOC information includes the SOC of the corresponding power battery at each temperature point;

[0071] The conversion unit 320 is used to perform SOC conversion on the first SOC information based on the second SOC information to obtain the SOC conversion information of the first power battery under the second SOC determination method; the SOC conversion information includes the new SOC corresponding to each temperature point;

[0072] The determining unit 330 is used to determine the SOC association relationship between the first power battery and the second power battery under the second SOC determining method based on the SOC conversion information and the second SOC information.

[0073] The conversion unit 320 is also used to convert the power value in the original power MAP of the first power battery using the SOC correlation relationship to obtain a new power MAP.

[0074] The functions of each functional unit of the power conversion device between power batteries provided in the above embodiments of this application can be realized through the above-described method steps. Therefore, the specific working process and beneficial effects of each unit in the power conversion device between power batteries provided in the embodiments of this application will not be repeated here.

[0075] This application also provides an electronic device, such as... Figure 4 As shown, it includes a processor 410, a communication interface 420, a memory 430, and a communication bus 440, wherein the processor 410, the communication interface 420, and the memory 430 communicate with each other through the communication bus 440.

[0076] Memory 430 is used to store computer programs;

[0077] When the processor 410 executes the program stored in the memory 430, it performs the following steps:

[0078] The first SOC information of the first power battery determined by the first SOC determination method and the second SOC information of the second power battery determined by the second SOC determination method are obtained respectively; wherein, the SOC information includes the SOC of the corresponding power battery at each temperature point;

[0079] Based on the second SOC information, the first SOC information is converted to obtain the SOC conversion information of the first power battery under the second SOC determination method; the SOC conversion information includes the new SOC corresponding to each temperature point;

[0080] Based on the SOC conversion information and the second SOC information, the SOC association relationship between the first power battery and the second power battery under the second SOC determination method is determined;

[0081] Using the SOC correlation, the power values ​​in the original power MAP of the first power battery are converted to obtain a new power MAP.

[0082] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.

[0083] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0084] The memory may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0085] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0086] The implementation methods and beneficial effects of the various components of the electronic device in the above embodiments for solving the problem can be found in [reference needed]. Figure 1 The steps in the illustrated embodiments are used to implement the electronic device. Therefore, the specific working process and beneficial effects of the electronic device provided in this application will not be repeated here.

[0087] In another embodiment provided in this application, a computer-readable storage medium is also provided, which stores instructions that, when executed on a computer, cause the computer to perform the power conversion method between power batteries as described in any of the above embodiments.

[0088] In another embodiment provided in this application, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute the power conversion method between power batteries described in any of the above embodiments.

[0089] Those skilled in the art will understand that the embodiments in this application can be provided as methods, systems, or computer program products. Therefore, the embodiments in this application can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, the embodiments in this application can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0090] This application describes embodiments of methods, apparatus (systems), and computer program products according to embodiments of this application with reference to flowchart illustrations and / or block diagrams. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0091] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0092] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0093] Although preferred embodiments have been described in this application, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of this application.

[0094] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of the embodiments of this application. Therefore, if these modifications and variations to the embodiments of this application fall within the scope of the claims in this application and their equivalents, then this application also intends to include these modifications and variations.

Claims

1. A power conversion method between power batteries, characterized in that, The method includes: The first SOC information of the first power battery determined by the first SOC determination method and the second SOC information of the second power battery determined by the second SOC determination method are obtained respectively; wherein, the SOC information includes the SOC of the corresponding power battery at each temperature point; the first SOC determination method is a room temperature capacity determination method and the second SOC determination method is a low temperature capacity determination method. Based on the second SOC information, the first SOC information is converted to obtain the SOC conversion information of the first power battery under the second SOC determination method; the SOC conversion information is the new SOC of the first power battery when the power is depleted under the second SOC determination method at each temperature point; Based on the SOC conversion information and the second SOC information, the SOC association relationship between the first power battery and the second power battery under the second SOC determination method is determined; using the SOC association relationship, the power value in the original power MAP of the first power battery is converted to obtain a new power MAP.

2. The method as described in claim 1, characterized in that, Acquire, respectively, the first SOC information of the first power battery determined by the first SOC determination method, and the second SOC information of the second power battery determined by the second SOC determination method, including: According to the preset SOC capacity, the SOC capacity of the first power battery and the second power battery are adjusted according to the first SOC determination method and the second SOC determination method respectively, so as to obtain the SOC of the first power battery and the second power battery at different temperature points respectively. The SOC of the first power battery at different temperature points is determined as the first SOC information, and the SOC of the second power battery at different temperature points is determined as the second SOC information.

3. The method as described in claim 1, characterized in that, Based on the SOC conversion information and the second SOC information, the SOC association relationship between the first power battery and the second power battery under the second SOC determination method is determined, including: Based on the SOC conversion information and the second SOC information, the zero SOC offset between the new SOC of the first power battery at each temperature point and the zero SOC of the second power battery at the corresponding temperature point is determined under the second SOC determination method. The SOC correlation is determined based on the zero SOC offset corresponding to each temperature point.

4. The method as described in claim 3, characterized in that, The SOC association relationship is represented as follows: ; Wherein, SOC(X) is the original SOC of the first power battery at any temperature point, SOC(Y) is the converted SOC of the first power battery at the temperature point, and P% is the zero SOC offset at the temperature point.

5. The method as described in claim 1, characterized in that, Using the aforementioned SOC correlation, the power values ​​in the original power MAP of the first power battery are converted to obtain a new power MAP, including: Using the SOC correlation, the power values ​​of different SOCs at different temperatures in the original power MAP of the first power battery are converted to obtain a new power MAP.

6. The method as described in claim 1, characterized in that, The SOC determination methods include adjusting the SOC based on the capacity at room temperature to determine each SOC state, and adjusting the SOC based on the capacity at a specific temperature to determine each SOC state.

7. A power conversion device between power batteries, characterized in that, The device includes: The acquisition unit is used to acquire first SOC information of the first power battery determined by a first SOC determination method, and second SOC information of the second power battery determined by a second SOC determination method; wherein, the SOC information includes the SOC of the corresponding power battery at each temperature point; the first SOC determination method is a room temperature capacity determination method, and the second SOC determination method is a low temperature capacity determination method. The conversion unit is used to perform SOC conversion on the first SOC information based on the second SOC information to obtain the SOC conversion information of the first power battery under the second SOC determination method; the SOC conversion information is the new SOC of the first power battery at each temperature point when the power is depleted under the second SOC determination method; The determining unit is used to determine the SOC association relationship between the first power battery and the second power battery under the second SOC determining method based on the SOC conversion information and the second SOC information. The conversion unit is further configured to use the SOC correlation to convert the power value in the original power MAP of the first power battery to obtain a new power MAP.

8. The apparatus as claimed in claim 7, characterized in that, The determining unit is specifically used to: determine the zero SOC offset between the zero SOC of the first power battery at each temperature point and the zero SOC of the second power battery at the corresponding temperature point under the second SOC determining method, based on the SOC conversion information and the second SOC information; The SOC correlation is determined based on the zero SOC offset corresponding to each temperature point.

9. An electronic device, characterized in that, The electronic device includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, when executing a program stored in memory, implements the method of any one of claims 1-6.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method described in any one of claims 1-6.

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