A vehicle battery power mapping relationship correction method, device, equipment and medium

Abstract

The application provides a vehicle battery power mapping relationship correction method, device, equipment and medium. The method comprises the following steps: obtaining an initial power mapping table; adjusting the vehicle battery to a test state of charge and obtaining a test power corresponding to the test state of charge based on the initial power mapping table; discharging the vehicle battery based on the test power to obtain a test result; and correcting the initial power mapping table based on the test result to obtain a corrected battery power mapping relationship. The method tests the discharge state of the vehicle according to the discharge power of the battery monomer, and corrects the battery power mapping relationship based on the test result, so that the corrected battery power mapping relationship is more suitable for the use scenario of the vehicle, and the battery management system can accurately provide the required maximum power under different states of charge and environmental temperature conditions, thereby improving the stability during the use of the vehicle and the user experience.

Description

Technical Field

[0001] This application relates to the field of vehicle testing technology, specifically to a method, device, equipment, and medium for correcting the power mapping relationship of a vehicle battery. Background Technology

[0002] Currently, battery management systems (BMS) used in vehicles generally rely on three main power mapping tables: short-time power mapping table, long-time power mapping table, and continuous power mapping table. These three mapping tables define the maximum power limits of the battery at different temperatures and states of charge (SOC). Among them, the short-time power mapping table provides the highest power limit and is suitable for short-term high power demand; the continuous power mapping table provides the lowest power limit and is suitable for long-term stable power output; the long-time power mapping table has a power limit in between and is suitable for medium-duration power demand.

[0003] These power mapping tables are provided by the battery cell R&D personnel based on the capabilities of the battery cells. When developing these tables, national standards (such as GB standards) or industry-standard testing methods are typically referenced for power verification under a single operating condition. Although a certain safety margin is usually reserved during the design process, these mapping tables often fail to fully consider the complex operating conditions of the vehicle in actual use. Therefore, in practical applications, especially under frequently changing load conditions, vehicles are prone to undervoltage, affecting the stability of the vehicle and the user experience. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, this application provides a method, apparatus, device and medium for correcting the power mapping relationship of a vehicle battery to solve the above-mentioned technical problems.

[0005] This application provides a method for correcting the power mapping relationship of a vehicle battery. The method includes: obtaining an initial power mapping table for individual battery cells, the initial power mapping table including the power of the battery under different temperature conditions and different states of charge conditions; adjusting the vehicle battery to a test state of charge and test temperature, and obtaining the test power corresponding to the test state of charge and test temperature based on the initial power mapping table; performing a discharge test on the vehicle battery based on the test power to obtain test results, the test results including qualified and unqualified; and correcting the initial power mapping table based on the test results.

[0006] In one embodiment of this application, the initial power mapping table includes at least a continuous power mapping table and a short-time power mapping table. Adjusting the vehicle battery to a test state of charge and test temperature, and obtaining the test power corresponding to the test state of charge and test temperature based on the initial power mapping table, includes: determining the continuous test power corresponding to the test state of charge based on the test state of charge and the continuous power mapping table; and determining the short-time test power corresponding to the test state of charge based on the test state of charge and the short-time power mapping table.

[0007] In one embodiment of this application, obtaining the test power corresponding to the test state of charge and test temperature based on the initial power mapping table includes: adjusting the vehicle battery to a first test state of charge, a second test state of charge, and a third test state of charge and test temperature, respectively, and performing a discharge test on the vehicle battery to obtain a first test result, a second test result, and a third test result; the first test state of charge, the second test state of charge, and the third test state of charge are three independent states of charge; or, obtaining the second state of charge and the third state of charge based on the first state of charge; or, obtaining the second state of charge based on the first state of charge and obtaining the third state of charge based on the second state of charge.

[0008] In one embodiment of this application, modifying the initial power mapping table based on the test results includes: modifying the initial power mapping table based on any two of the first test results, the second test results, and the third test results; or, modifying the initial power mapping table based on the first test results, the second test results, and the third test results together.

[0009] In one embodiment of this application, a discharge test is performed on the vehicle battery based on the test power, including: adjusting the vehicle battery to a first test state of charge and a test temperature; obtaining a first continuous test power corresponding to the first test state of charge based on the continuous power mapping table; performing a discharge test on the vehicle battery for a first preset duration based on the first continuous test power, and monitoring the voltage of each battery cell during the discharge process; if the voltage of any battery cell is detected to be lower than a preset lower voltage threshold, the first test result is determined to be unqualified.

[0010] In one embodiment of this application, the discharge test of the vehicle battery based on the test power further includes: adjusting the vehicle battery to a second test state of charge and test temperature; obtaining a second short-time test power corresponding to the second state of charge based on the short-time power mapping table; performing a discharge test of the vehicle battery for a second preset duration based on the second short-time test power, and monitoring the voltage of each battery cell during the discharge process; if the voltage of any battery cell is found to be lower than a preset lower voltage threshold, the second test result is determined to be unqualified.

[0011] In one embodiment of this application, the discharge test of the vehicle battery based on the test power further includes: adjusting the vehicle battery to a third test state of charge and test temperature; obtaining the third continuous test power corresponding to the third test state of charge based on the continuous power mapping table, and obtaining the third short-time test power corresponding to the third state of charge based on the short-time power mapping table; gradually adjusting the vehicle battery from the third short-time test power to the third continuous test power within a predetermined third discharge duration, and monitoring the voltage of each battery cell in real time throughout the discharge process; if the voltage of any battery cell is found to be lower than a preset lower voltage threshold, the third test result is determined to be unqualified.

[0012] This application provides a vehicle battery power mapping relationship correction device, the device comprising: a data acquisition module for acquiring an initial power mapping table, the initial power mapping table including the battery power under different temperature conditions and different states of charge conditions; a test power determination module for adjusting the vehicle battery to a test state of charge and test temperature, and obtaining the test power corresponding to the test state of charge and test temperature based on the initial power mapping table; a discharge test module for performing a discharge test on the vehicle battery based on the test power to obtain test results, the test results including qualified and unqualified; and a battery power correction module for correcting the initial power mapping table based on the test results.

[0013] This application provides an electronic device, characterized in that it includes a processor, a memory, and a communication bus; the communication bus is used to connect the processor and the memory; the processor is used to execute a computer program stored in the memory to implement the vehicle battery power mapping relationship correction method as described above.

[0014] This application provides a computer-readable storage medium, characterized in that it stores a computer program thereon, the computer program being used to cause a computer to execute the vehicle battery power mapping relationship correction method as described above.

[0015] The beneficial effects of this application are as follows: The vehicle battery power mapping correction method in this application adjusts the vehicle battery to a predetermined test state of charge (SOC), obtains the test power corresponding to the test SOC based on an initial power mapping table, performs a discharge test on the vehicle battery based on the test power, records the test results, and finally corrects the initial power mapping table based on the test results to obtain a more accurate battery power mapping relationship. This method tests the vehicle's discharge state based on the discharge power of individual battery cells under different conditions, and corrects the battery power mapping relationship based on the test results. This corrected battery power mapping relationship can better adapt to the actual use scenarios of the vehicle, ensuring that the battery management system (BMS) can accurately provide the required maximum power under different SOC and ambient temperature conditions. This not only improves the stability and reliability of the vehicle during use but also significantly enhances the user experience.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0018] Figure 1 This is a schematic diagram illustrating the implementation environment of a vehicle battery power mapping relationship correction method, as shown in an exemplary embodiment of this application.

[0019] Figure 2 This is a flowchart illustrating a method for correcting the power mapping relationship of a vehicle battery, as shown in an exemplary embodiment of this application;

[0020] Figure 3 This is a schematic diagram illustrating the test process of a method for correcting the power mapping relationship of a vehicle battery, as shown in an exemplary embodiment of this application.

[0021] Figure 4 This is a block diagram illustrating a vehicle battery power mapping correction device according to an exemplary embodiment of this application;

[0022] Figure 5 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation

[0023] The embodiments of this application will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be understood that the preferred embodiments are only for illustrating this application and are not intended to limit the scope of protection of this application.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present application. However, it will be apparent to those skilled in the art that embodiments of the present application may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present application.

[0026] First, it should be noted that SOC (State of Charge) refers to the battery's state of charge, which is the ratio of the battery's remaining capacity to its capacity when fully charged. It is usually expressed as a percentage and is used to describe how much usable energy the battery currently stores.

[0027] The power reserve buffer refers to a portion of the unused power capacity reserved in the battery management system (BMS) to ensure the safe operation of the battery and extend its lifespan.

[0028] Figure 1 This is a schematic diagram illustrating the implementation environment of a method for correcting the power mapping relationship of a vehicle battery, as shown in an exemplary embodiment of this application.

[0029] like Figure 1As shown, the implementation environment of the vehicle battery power mapping relationship correction method includes a data acquisition module 101 and a computer module 102. The data acquisition module 101 is responsible for collecting raw data during the operation of the electric vehicle. This data includes, but is not limited to, the initial power mapping table of individual battery cells and other relevant parameters such as battery voltage, current, and discharge time. The data acquisition device can be various sensors installed on the electric vehicle (such as temperature sensors, battery management systems, ambient temperature sensors, etc.), or data collected by external devices connected to the electric vehicle wirelessly or via wired means. This application does not impose any restrictions on the specific implementation form of the data acquisition module. The computer module 102 is used to process the raw data collected by the data acquisition module 101, and obtain the battery discharge power at different temperature states and different SOC states based on the collected initial power mapping table of individual battery cells. Based on this discharge power, a discharge test is performed to obtain the test results, and the initial power mapping table is corrected according to the obtained test results to obtain the corrected battery power mapping relationship. The computer module 102 can be a high-performance CPU computer, a CPU computing cluster, a dedicated edge computing device, or an embedded system integrated on the electric vehicle, etc. This application also does not impose any restrictions on the specific type of computer equipment.

[0030] Figure 2 This is a flowchart illustrating a method for correcting the power mapping relationship of a vehicle battery, as shown in an exemplary embodiment of this application.

[0031] like Figure 2 As shown, in an exemplary embodiment, the method for correcting the vehicle battery power mapping relationship includes at least steps S210 to S240, which are described in detail below:

[0032] Step S210: Obtain the initial power mapping table of the battery cell. The initial power mapping table records the power of the battery under different temperature conditions and different states of charge conditions.

[0033] In one embodiment of this application, any single battery cell that makes up the vehicle battery pack is selected as the target battery, and the target battery is tested at different ambient temperatures from low to high temperatures, and at different SOC levels from near empty to fully charged. Under each test condition, its short-term power (e.g., maximum power within 5 seconds) and continuous power (e.g., maximum power within 30 seconds) are recorded. Finally, a detailed initial power mapping table is generated based on the recorded test results, which includes the maximum power output value under different temperature and SOC conditions.

[0034] Step S220: Adjust the vehicle battery to the test state of charge and test temperature, and obtain the test power corresponding to the test state of charge and test temperature based on the initial power mapping table.

[0035] In one embodiment of this application, the initial power mapping table includes at least a continuous power mapping table and a short-time power mapping table. Obtaining the test power corresponding to the test state of charge based on the initial power mapping table includes: determining the continuous test power corresponding to the test state of charge based on the test state of charge and the continuous power mapping table; and determining the short-time test power corresponding to the test state of charge based on the test state of charge and the short-time power mapping table.

[0036] In one embodiment of this application, an initial power mapping table for a single battery cell is obtained, which includes at least two parts: a continuous power mapping table and a short-time power mapping table. The continuous power mapping table records the maximum continuous power output of the battery under different temperature and SOC conditions, while the short-time power mapping table records the maximum short-time power output that the battery can provide under the same conditions. Taking a test SOC of 50% and a test temperature of room temperature (25°C) as an example, the battery power corresponding to 50% SOC and 25°C in the continuous power mapping table is the continuous test power, and the battery power corresponding to 50% SOC and 25°C in the short-time power mapping table is the short-time test power.

[0037] Figure 3 This is a schematic diagram illustrating the test process of a method for correcting the power mapping relationship of a vehicle battery, as shown in an exemplary embodiment of this application. Figure 3 As shown, firstly, the initial power mapping table of the battery cells is obtained, and the vehicle battery is adjusted to the test state of charge and test temperature; then, continuous power discharge test is performed to obtain the first test result, short-time power discharge test is performed to obtain the second test result, and table-cutting rate discharge test is performed to obtain the third test result; finally, the initial power mapping table is corrected based on multiple test results from the first test result, the second test result, and the third test result.

[0038] Step S230: Perform a discharge test on the vehicle battery based on the test power to obtain test results, which include pass and fail. It should be noted that during each test, after adjusting the battery to the specified test temperature, it needs to be left to stand for a period of time to allow it to reach thermal equilibrium at the test temperature.

[0039] In one embodiment of this application, a discharge test is performed on the vehicle battery based on the test power, including: adjusting the vehicle battery to a first test state of charge and test temperature; obtaining a first continuous test power corresponding to the first test state of charge based on a continuous power mapping table; performing a discharge test on the vehicle battery for a first preset duration based on the first continuous test power, and monitoring the voltage of each battery cell during the discharge process; if the voltage of any battery cell is detected to be lower than a preset lower voltage threshold, the first test result is determined to be unqualified.

[0040] In one specific embodiment of this application, taking a test state of charge (SOC) of 50% and a test temperature of room temperature (25°C) as an example, the first continuous test power is obtained by looking up the continuous power mapping table as 80kW. Taking a first preset duration of 30 seconds as an example, the vehicle battery is continuously discharged for 30 seconds based on a discharge power of 80kW. At the same time, the voltage change of the battery cells is monitored during the discharge process, and the detected voltage values ​​of each battery cell are compared with a preset lower voltage threshold. If the voltage value of any battery cell is lower than the lower voltage threshold, the test result is deemed unqualified; otherwise, the test is considered qualified.

[0041] In one embodiment of this application, the discharge test of the vehicle battery based on the test power further includes: adjusting the vehicle battery to a second test state of charge and test temperature; obtaining the second short-time test power corresponding to the second state of charge based on a short-time power mapping table; performing a discharge test of the vehicle battery for a second preset duration based on the second short-time test power, and monitoring the voltage of each battery cell during the discharge process; if the voltage of any battery cell is found to be lower than a preset lower voltage threshold, the second test result is determined to be unqualified.

[0042] Taking a test with a State of Charge (SOC) of 50% and a test temperature of 25°C as an example, the corresponding second short-time test power is 100kW according to the short-time power mapping table. Taking a second preset duration of 5 seconds as an example, the entire vehicle battery is continuously discharged for 5 seconds based on a discharge power of 100kW. At the same time, the voltage change of each battery cell is monitored during the discharge process, and the detected voltage value of each battery cell is compared with the preset lower voltage threshold. If the voltage value of any battery cell is lower than the lower voltage threshold, the test result is considered unqualified; otherwise, the test is considered qualified.

[0043] It should be noted that the preset first duration is usually determined based on the continuous power usage time under common undervoltage conditions in current vehicles, and is generally between 20-60 seconds. This application does not impose any restrictions on its determination method or specific duration.

[0044] In one embodiment of this application, the discharge test of the vehicle battery based on the test power further includes: adjusting the vehicle battery to a third test state of charge and test temperature; obtaining the third continuous test power corresponding to the third test state of charge based on a continuous power mapping table, and obtaining the third short-time test power corresponding to the third state of charge based on a short-time power mapping table; gradually adjusting the vehicle battery from the third short-time test power to the third continuous test power within a predetermined third discharge duration, and monitoring the voltage of each battery cell in real time throughout the discharge process; if the voltage of any battery cell is found to be lower than a preset lower voltage threshold, the third test result is determined to be unqualified.

[0045] Taking a test with a State of Charge (SOC) of 50% and a test temperature of 25°C as an example, the third continuous test power is 80kW according to the continuous power mapping table, and the third short-time test power is 100kW according to the short-time power mapping table. Taking a third preset duration of 15 seconds as an example, during the continuous 15-second discharge process, the discharge power of the entire vehicle is smoothly transitioned from 100kW to 80kW. At the same time, the voltage change of each battery cell is monitored during the discharge process, and the detected voltage values ​​of each battery cell are compared with the preset lower voltage threshold. If the voltage value of any battery cell is lower than the lower voltage threshold, the test result is considered unqualified; otherwise, the test is considered qualified.

[0046] It should be noted that the preset second duration is usually determined based on the short-term power usage time under common undervoltage conditions in vehicles, and is generally less than 10 seconds. This application does not impose any restrictions on its determination method or specific duration.

[0047] It should be noted that the above embodiments essentially test the battery power through a switching rate. Therefore, in actual execution, this can be achieved by setting a precise third preset duration or by setting a switching rate. If implemented based on the switching rate, the specific steps are as follows: First, adjust the vehicle to the third test state of charge and test temperature; then, obtain the third continuous test power corresponding to the third test state of charge and test temperature based on the continuous power mapping table, and obtain the third short-time test power corresponding to the third test state of charge and test temperature based on the short-time power mapping table; then, according to the preset switching rate, gradually adjust the vehicle battery from the third short-time test power to the third continuous test power, and monitor the voltage of each battery cell in real time throughout the discharge process; if the voltage of any battery cell is found to be lower than the preset lower voltage threshold, the third test result is determined to be unqualified.

[0048] In one embodiment of this application, the first test state of charge, the second test state of charge, and the third test state of charge are three independent states of charge; or, the second state of charge and the third state of charge are obtained based on the first state of charge; or, the second state of charge is obtained based on the first state of charge, and the third state of charge is obtained based on the second state of charge.

[0049] It should be noted that in actual testing, since the three testing methods in the above embodiments are relatively independent, their corresponding test states of charge can also be independent of each other. Considering the continuity of testing and the power buffer that the vehicle can accept, multiple test states of charge can be interconnected. For example, the state of charge at the end of the first test can be used as the initial state of charge for the second test, and the state of charge at the end of the second test can be used as the initial state of charge for the third test. In addition, based on a preset coefficient, the product of the first state of charge and the preset coefficient can be used as the second state of charge, and the product of the first state of charge or the second state of charge and the preset coefficient can be used as the third state of charge. This application does not impose any specific restrictions on the value of the initial state of charge, or the determination method and value of the preset coefficient.

[0050] Step S240: Based on the test results, the initial power mapping table is corrected to obtain the corrected battery power mapping relationship.

[0051] In one embodiment of this application, modifying the initial power mapping table based on test results includes: modifying the initial power mapping table based on any two of the first test result, the second test result, and the third test result; or, modifying the initial power mapping table based on the first test result, the second test result, and the third test result together.

[0052] It should be noted that test results are typically defined as either pass or fail. A pass result indicates that the power information in the initial power mapping table used in the test is accurate and requires no further correction. A fail result requires further assessment based on the specific test performance to determine whether the power information in the corresponding initial power mapping table needs to be adjusted upwards or downwards. The specific downward adjustment is determined based on the actual test performance and the vehicle's application environment; therefore, this application does not impose any specific limitations on the specific correction method.

[0053] In one specific embodiment of this application, based on test results, it was found that the maximum short-time power setting in the short-time power mapping table under the conditions of 25°C and 50% SOC was too high and needed to be lowered. Assume the maximum short-time power is lowered from 100kW to 90kW, and the short-time power mapping table is updated. Furthermore, for the continuous power mapping table, if no premature voltage drop or other abnormalities are found during the test, it can remain unchanged.

[0054] Furthermore, commonly used battery power mapping tables typically include three types: long-term power mapping table, short-term power mapping table, and continuous power mapping table, and there is an inherent relationship between these three power levels for the same battery. The long-term power mapping table describes the maximum power that the battery can continuously provide over a longer period; the short-term power mapping table describes the maximum peak power that the battery can provide over a short period; and the continuous power mapping table describes the maximum power that the battery can continuously provide over a certain period. These mapping tables are interdependent, meaning that a change in one power level will affect the settings of other power levels. Therefore, in the method proposed in this application, the short-term and continuous power mapping tables can be corrected based on test results, and the long-term power mapping table can be adjusted accordingly. Specifically, if the short-term power is reduced, then the continuous and long-term power levels also need to be adjusted accordingly to ensure the battery's performance consistency and safety throughout its entire service life.

[0055] It should be noted that the method proposed in this application can ensure that the impact on the long-term power mapping table is not ignored while correcting the short-term and continuous power mapping tables, thereby achieving comprehensive optimization of the entire battery power management system. This not only improves the accuracy and reliability of the battery management system, but also enhances its adaptability and robustness in practical applications.

[0056] Figure 4 This is a block diagram illustrating a vehicle battery power mapping correction device according to an exemplary embodiment of this application. The device can be applied to... Figure 1 The implementation environment shown is illustrated. This device can also be applied to other exemplary implementation environments and specifically configured in other devices. This embodiment does not limit the implementation environment to which the device is applicable.

[0057] like Figure 4 As shown, the exemplary vehicle battery power mapping relationship correction device includes: a data acquisition module 410, a test power determination module 420, a discharge test module 430, and a battery power correction module 440.

[0058] The system includes a data acquisition module 410 for acquiring an initial power mapping table, which records the battery power under different temperature and state of charge conditions; a test power determination module 420 for adjusting the vehicle battery to the test state of charge and test temperature, and obtaining the test power corresponding to the test state of charge and test temperature based on the initial power mapping table; a discharge test module 430 for performing a discharge test on the vehicle battery based on the test power to obtain test results, including pass and fail; and a battery power correction module 440 for correcting the initial power mapping table based on the test results to obtain the corrected battery power mapping relationship.

[0059] It should be noted that the vehicle battery power mapping relationship correction device provided in the above embodiments and the vehicle battery power mapping relationship correction method provided in the above embodiments belong to the same concept. The specific operation methods of each module and unit have been described in detail in the method embodiments, and will not be repeated here. In practical applications, the vehicle battery power mapping relationship correction device provided in the above embodiments can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0060] Embodiments of this application also provide an electronic device, including: one or more processors; and a storage device for storing one or more programs, which, when executed by one or more processors, cause the electronic device to implement the vehicle battery power mapping relationship correction method provided in the above embodiments.

[0061] Figure 5 A schematic diagram of a computer system suitable for implementing the embodiments of this application is shown. It should be noted that... Figure 5 The computer system 500 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0062] like Figure 5 As shown, the computer system 500 includes a Central Processing Unit (CPU) 501, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 502 or programs loaded from storage portion 508 into Random Access Memory (RAM) 503, such as performing the methods described in the above embodiments. The RAM 503 also stores various programs and data required for system operation. The CPU 501, ROM 502, and RAM 503 are interconnected via a bus 504. An Input / Output (I / O) interface 505 is also connected to the bus 504.

[0063] The following components are connected to I / O interface 505: an input section 506 including a keyboard, mouse, etc.; an output section 507 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to I / O interface 505 as needed. Removable media 511, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 510 as needed so that computer programs read from them can be installed into storage section 508 as needed.

[0064] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 509, and / or installed from removable medium 511. When the computer program is executed by central processing unit (CPU) 501, it performs various functions defined in the system of this application.

[0065] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0066] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0067] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0068] Another aspect of this application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a computer's processor, causes the computer to perform the vehicle battery power mapping relationship correction method as described above. This computer-readable storage medium may be included in the electronic device described in the above embodiments, or it may exist independently and not assembled into the electronic device.

[0069] Another aspect of this application provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the vehicle battery power mapping correction method provided in the various embodiments described above.

[0070] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A method for correcting the power mapping relationship of a vehicle battery, characterized in that, The method includes: Obtain an initial power mapping table for a single battery cell. The initial power mapping table includes the power of the battery under different temperature conditions and different states of charge conditions. The initial power mapping table includes at least a continuous power mapping table and a short-time power mapping table. The vehicle battery is adjusted to the test state of charge and test temperature, and the test power corresponding to the test state of charge and the test temperature is obtained based on the initial power mapping table; The vehicle battery is discharged based on the test power to obtain the test results; The initial power mapping table is revised based on the test results; The discharge test of the vehicle battery based on the test power includes: adjusting the vehicle battery to a third test state of charge and the test temperature; obtaining the third continuous test power corresponding to the third test state of charge based on the continuous power mapping table, and obtaining the third short-time test power corresponding to the third test state of charge based on the short-time power mapping table; gradually adjusting the vehicle battery from the third short-time test power to the third continuous test power within a predetermined third discharge duration, and monitoring the voltage of each battery cell in real time throughout the discharge process; if the voltage of any battery cell is found to be lower than a preset lower voltage threshold, the third test result is determined to be unqualified, and the test result includes the third test result.

2. The method for correcting the vehicle battery power mapping relationship according to claim 1, characterized in that, The test power corresponding to the test state of charge and the test temperature is obtained based on the initial power mapping table, including: Based on the test state of charge and the continuous power mapping table, determine the continuous test power corresponding to the test state of charge; Based on the test state of charge and the short-time power mapping table, the short-time test power corresponding to the test state of charge is determined.

3. The method for correcting the vehicle battery power mapping relationship according to claim 2, characterized in that, Based on the initial power mapping table, the test power corresponding to the test state of charge and the test temperature is obtained, including: The vehicle battery was adjusted to the first test state of charge, the second test state of charge, and the third test state of charge and the test temperature, respectively, and a discharge test was performed on the vehicle battery to obtain the first test result, the second test result, and the third test result. The first test state of charge, the second test state of charge, and the third test state of charge are three independent states of charge; or, the second test state of charge and the third test state of charge are obtained based on the first test state of charge; or, the second test state of charge is obtained based on the first test state of charge, and the third test state of charge is obtained based on the second test state of charge.

4. The method for correcting the vehicle battery power mapping relationship according to claim 3, characterized in that, The initial power mapping table is revised based on the test results, including: The initial power mapping table is corrected based on any two of the first test result, the second test result, and the third test result; or, The initial power mapping table is corrected based on the first test result, the second test result, and the third test result.

5. The method for correcting the vehicle battery power mapping relationship according to claim 4, characterized in that, The vehicle battery is discharged based on the test power, including: Adjust the vehicle battery to the first test state of charge and the test temperature; The first continuous test power corresponding to the first test state of charge is obtained based on the continuous power mapping table; The vehicle battery is subjected to a discharge test for a first preset duration based on the first continuous test power, and the voltage of each battery cell is monitored during the discharge process. If the voltage of any single battery cell is detected to be lower than the preset lower voltage threshold, the first test result is deemed unqualified.

6. The method for correcting the vehicle battery power mapping relationship according to claim 4, characterized in that, The discharge test of the vehicle battery based on the test power also includes: Adjust the vehicle battery to the second test state of charge and the test temperature; The second short-time test power corresponding to the second test state of charge is obtained based on the short-time power mapping table; The vehicle battery is subjected to a discharge test for a second preset duration based on the second short-time test power, and the voltage of each battery cell is monitored during the discharge process. If the voltage of any single battery cell is detected to be lower than the preset lower voltage threshold, the second test result is deemed unqualified.

7. A device for correcting the power mapping relationship of a vehicle battery, characterized in that, The device includes: The data acquisition module is used to acquire an initial power mapping table, which includes the power of the battery under different temperature conditions and different states of charge conditions. The initial power mapping table includes at least a continuous power mapping table and a short-time power mapping table. The test power determination module is used to adjust the vehicle battery to the test state of charge and test temperature, and obtain the test power corresponding to the test state of charge and the test temperature based on the initial power mapping table. A discharge test module is used to perform a discharge test on the vehicle battery based on the test power to obtain a test result, which includes pass and fail. The discharge test on the vehicle battery based on the test power includes: adjusting the vehicle battery to a third test state of charge and the test temperature; obtaining the third continuous test power corresponding to the third test state of charge based on the continuous power mapping table, and obtaining the third short-time test power corresponding to the third test state of charge based on the short-time power mapping table; gradually adjusting the vehicle battery from the third short-time test power to the third continuous test power within a predetermined third discharge duration, and monitoring the voltage of each battery cell in real time throughout the discharge process; if the voltage of any battery cell is found to be lower than a preset lower voltage threshold, the third test result is determined to be fail, and the test result includes the third test result. A battery power correction module is used to correct the initial power mapping table based on the test results.

8. An electronic device, characterized in that, It includes a processor, a memory, and a communication bus; the communication bus is used to connect the processor and the memory; the processor is used to execute a computer program stored in the memory to implement the vehicle battery power mapping relationship correction method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, It stores a computer program that enables the computer to execute the vehicle battery power mapping relationship correction method as described in any one of claims 1-6.

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