Complete vehicle battery power mapping relation correction method, device, equipment and medium

Abstract

The invention provides a vehicle battery power mapping relation correction method and device, equipment and a medium, and the method comprises the steps: obtaining an initial power mapping table, adjusting a vehicle battery to a test charge state, obtaining the corresponding test power based on the initial power mapping table, and setting the test power as the initial power mapping table; performing a discharge test on the whole 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 relation; according to the method, the discharge state of the whole vehicle is tested according to the discharge power of the battery monomers, and the battery power mapping relation is corrected based on the test result, so that the corrected battery power mapping relation is more suitable for the use scene of the vehicle, and the battery power mapping relation is more suitable for the use scene of the vehicle under different charge states and environment temperature conditions. And the battery management system can accurately provide the required maximum power, so that the stability of the whole vehicle in the using process and the user experience are improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle testing, and in particular to a method, device, equipment and medium for correcting a vehicle battery power mapping relationship. Background Art

[0002] At present, the battery management system (BMS) used in the whole vehicle generally relies on three main power mapping tables: short-term power mapping table, long-term power mapping table and continuous power mapping table. These three mapping tables define the maximum power limit of the battery at different temperatures and states of charge (SOC). Among them, the short-term power mapping table provides the highest power limit, which is suitable for short-term high power demand; the continuous power mapping table provides the lowest power limit, which is suitable for long-term stable power output; the power limit of the long-term power mapping table is between the two, which is suitable for medium-term power demand.

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

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

[0005] The present application provides a method for correcting a power mapping relationship of a whole vehicle battery, the method comprising: obtaining an initial power mapping table of a battery cell, the initial power mapping table comprising the power of the battery under different temperature conditions and different state of charge conditions; adjusting the whole vehicle battery to a test state of charge and a test temperature, and obtaining a test power corresponding to the test state of charge and the test temperature based on the initial power mapping table; performing a discharge test on the whole vehicle battery based on the test power to obtain a test result, the test result comprising a qualified and a unqualified test result; and correcting the initial power mapping table based on the test result.

[0006] In one embodiment of the present application, the initial power mapping table includes at least a continuous power mapping table and a short-time power mapping table, and the battery of the entire vehicle is adjusted to a test state of charge and a 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, including: 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; 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 the present application, the test power corresponding to the test state of charge and the test temperature is obtained based on the initial power mapping table, including: adjusting the whole vehicle battery to a first test state of charge, a second state of charge, and a third state of charge and a test temperature, respectively, and performing a discharge test on the whole 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, 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.

[0008] In one embodiment of the present application, the initial power mapping table is corrected based on the test results, including: correcting the initial power mapping table based on any two test results of the first test result, the second test result, and the third test result; or, correcting the initial power mapping table based on the first test result, the second test result, and the third test result.

[0009] In one embodiment of the present application, a discharge test is performed on the whole vehicle battery based on the test power, including: adjusting the whole 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 whole vehicle battery for a first preset duration according to 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 monitored to be lower than a preset voltage usage lower limit threshold, the first test result is determined to be unqualified.

[0010] In one embodiment of the present application, a discharge test is performed on the whole vehicle battery based on the test power, and the test also includes: adjusting the whole 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 on the whole vehicle battery for a second preset duration according to 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 monitored to be lower than the preset voltage usage lower limit threshold, the second test result is determined to be unqualified.

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

[0012] The present application provides a device for correcting the power mapping relationship of a whole vehicle battery, the device comprising: a data acquisition module, used to obtain an initial power mapping table, the initial power mapping table comprising the power of the battery under different temperature conditions and different charge states; a test power determination module, used to adjust the whole vehicle battery to a test charge state and a test temperature, and obtain the test power corresponding to the test charge state and the test temperature based on the initial power mapping table; a discharge test module, used to perform a discharge test on the whole vehicle battery based on the test power to obtain a test result, the test result comprising a qualified and a unqualified result; a battery power correction module, used to correct the initial power mapping table based on the test result.

[0013] The present 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] The present application provides a computer-readable storage medium, characterized in that a computer program is stored thereon, and the computer program is used to enable a computer to execute the vehicle battery power mapping relationship correction method as described above.

[0015] Beneficial effects of the present application: The vehicle battery power mapping relationship correction method in the present application adjusts the vehicle battery to a predetermined test state of charge, and obtains the test power corresponding to the test state of charge according to the initial power mapping table, thereby performing a discharge test on the vehicle battery based on the test power, and recording the test results, and finally correcting the initial power mapping table according to the test results to obtain a more accurate battery power mapping relationship. This method tests the discharge state of the vehicle according to the discharge power of the battery cells under different conditions, and corrects the battery power mapping relationship based on the test results, so that the corrected battery power mapping relationship can better adapt to the actual use scenario of the vehicle, ensuring that under different states of charge (SOC) and ambient temperature conditions, the battery management system (BMS) can accurately provide the required maximum power, which not only improves the stability and reliability of the vehicle during use, but also significantly improves the user experience.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 is a schematic diagram of an implementation environment of a vehicle battery power mapping relationship correction method shown in an exemplary embodiment of the present application;

[0019] Figure 2 is a flow chart of a method for correcting a vehicle battery power mapping relationship shown in an exemplary embodiment of the present application;

[0020] Figure 3 It is a schematic diagram of the test process of a vehicle battery power mapping relationship correction method shown in an exemplary embodiment of the present application;

[0021] Figure 4 is a block diagram of a vehicle battery power mapping relationship correction device shown in an exemplary embodiment of the present application;

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

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

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0025] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present application difficult to understand.

[0026] First of all, it should be noted that SOC (State of Charge) refers to the state of charge of the battery, that is, the ratio of the remaining power of the battery to the power when it is fully charged. It is usually expressed as a percentage to describe how much available energy the battery currently stores.

[0027] Power Reserve Buffer refers to a portion of underutilized power capacity reserved in the battery management system (BMS) to ensure safe operation of the battery and extend its service life.

[0028] Figure 1 It is a schematic diagram of the implementation environment of a vehicle battery power mapping relationship correction method shown in an exemplary embodiment of the present 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. Among them, the data acquisition module 101 is responsible for collecting the original data during the operation of the tram, which includes but is not limited to the initial power mapping table of the battery cell and other related parameters, such as battery voltage, current, discharge time, etc. The data acquisition device can be various sensors installed on the tram (such as temperature sensors, battery management systems, ambient temperature sensors, etc.), or it can be data collected by an external device after connecting to the tram wirelessly or wired. 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 original data collected by the data acquisition module 101, and obtain the discharge power of the battery under different temperature states and different SOC states according to the collected initial power mapping table of the battery cell, and perform a discharge test based on the discharge power to obtain the test results, so as to correct the initial power mapping table according to the test results obtained, and 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 in the tram. This application also does not impose any restrictions on the specific type of computer device.

[0030] Figure 2 It is a flow chart of a method for correcting a vehicle battery power mapping relationship shown in an exemplary embodiment of the present application.

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

[0032] Step S210 , obtaining an initial power mapping table of a battery cell, wherein the initial power mapping table records the power of the battery under different temperature conditions and different charge states.

[0033] In one embodiment of the present application, any battery cell constituting the battery pack of the entire vehicle is selected as the target battery, and the target battery is tested at different ambient temperatures from low temperature to high temperature, and different SOC levels from nearly empty to fully charged. Under each test condition, its short-time power (such as the maximum power within 5 seconds) and continuous power (such as the maximum power within 30 seconds) are recorded respectively. Finally, a detailed initial power mapping table is generated based on the recorded test results, which includes the maximum power output values ​​under different temperature and SOC conditions.

[0034] Step S220, adjusting the vehicle battery to a test state of charge and a test temperature, and obtaining a test power corresponding to the test state of charge and the test temperature based on an initial power mapping table.

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

[0036] In one embodiment of the present application, an initial power mapping table of a 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 the test state of charge SOC of 50% and the test temperature of room temperature 25°C as an example, the battery power corresponding to the SOC of 50% and the temperature of 25°C in the continuous power mapping table is the continuous test power, and the battery power corresponding to the SOC of 50% and the temperature of 25°C in the short-time power mapping table is the short-time test power.

[0037] Figure 3 FIG. 1 is a schematic diagram of a test process of a vehicle battery power mapping relationship correction method according to an exemplary embodiment of the present application. Figure 3 As shown, first, an initial power mapping table of a battery cell is obtained, and the battery of the entire vehicle is adjusted to a test state of charge and a test temperature; then, a continuous power discharge test is performed on the battery to obtain a first test result, a short-time power discharge test is performed on the battery to obtain a second test result, and a switching rate discharge test is performed on the battery to obtain a third test result; finally, based on the first test result, the second test result, and multiple test results in the third test result, the initial power mapping table is corrected.

[0038] Step S230, a discharge test is performed on the vehicle battery based on the test power to obtain a test result, which includes a qualified or unqualified result. It should be noted that in each test process, after the battery is adjusted to the specified test temperature, it needs to be left still for a period of time so that its temperature reaches thermal equilibrium under the test temperature state.

[0039] In one embodiment of the present application, a discharge test is performed on a vehicle battery based on a 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 a continuous power mapping table; performing a discharge test on the vehicle battery for a first preset duration according to 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 monitored to be lower than a preset voltage usage lower limit threshold, the first test result is determined to be unqualified.

[0040] In a specific embodiment of the present application, the test state of charge SOC is 50% and the test temperature is room temperature 25°C. According to the query of the continuous power mapping table, the corresponding first continuous test power is 80kW, and the first preset time is 30 seconds. The vehicle battery is subjected to a continuous discharge test for 30 seconds based on a discharge power of 80kW, and the voltage change of the battery cell during the discharge process is monitored at the same time. The voltage value of each battery cell detected is compared with the preset voltage usage lower limit threshold. If the voltage value of any battery cell is less than the voltage usage lower limit threshold, the test result is judged to be unqualified, otherwise it is deemed to be qualified.

[0041] In one embodiment of the present application, a discharge test is performed on the whole vehicle battery based on the test power, and the test also includes: adjusting the whole 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 a short-time power mapping table; performing a discharge test on the whole vehicle battery for a second preset duration according to 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 monitored to be lower than the preset voltage usage lower limit threshold, the second test result is determined to be unqualified.

[0042] Take the test state of charge SOC of 50% and the test temperature of room temperature 25°C as an example. According to the query of the short-time power mapping table, the corresponding second short-time test power is 100kW. Taking the second preset duration of 5 seconds as an example, the vehicle battery is subjected to a continuous discharge test for 5 seconds based on a discharge power of 100kW, while monitoring the voltage changes of the battery cells during the discharge process, and comparing the voltage values ​​of each battery cell detected with the preset voltage usage lower limit threshold. If the voltage value of any battery cell is less than the voltage usage lower limit threshold, the test result is judged to be unqualified, otherwise it is deemed to be qualified.

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

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

[0045] Take the test state of charge SOC of 50% and the test temperature of room temperature 25°C as an example. According to the query of the continuous power mapping table, the corresponding third continuous test power is 80kW, and according to the query of the short-time power mapping table, the corresponding third short-time test power is 100kW. Taking the third preset time of 15 seconds as an example, during the continuous discharge process of 15 seconds, the discharge power of the whole vehicle is smoothly transitioned from 100kW to 80kW, and the voltage change of the battery cell during the discharge process is monitored at the same time. The voltage value of each battery cell detected is compared with the preset voltage usage lower limit threshold. If the voltage value of any battery cell is less than the voltage usage lower limit threshold, the test result is judged to be unqualified, otherwise it is regarded as qualified.

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

[0047] It should be noted that the above embodiment essentially tests the power of the battery through the table switching rate. Therefore, in the actual execution process, it can be achieved by setting the exact third preset time length, or by setting the table switching rate. If it is achieved based on the table switching rate, the specific steps are as follows: first, adjust the whole vehicle to the third test state of charge and test temperature; then, based on the continuous power mapping table, obtain the third continuous test power corresponding to the third test state of charge and test temperature, and based on the short-time power mapping table, obtain the third short-time test power corresponding to the third test state of charge and test temperature; then, according to the preset table switching rate, gradually adjust the battery of the whole vehicle from the third short-time test power to the third continuous test power, and monitor the voltage of each battery cell in real time during the entire discharge process; if the voltage of any battery cell is monitored to be lower than the preset voltage usage lower limit threshold, the third test result is determined to be unqualified.

[0048] In one embodiment of the present 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 the actual test process, since the three test methods in the above embodiment are relatively independent, the corresponding test states of charge can also be independent of each other; considering the continuity of the test and the power reserve buffer that the whole vehicle can accept, the multiple test states of charge can be interrelated, for example, the state of charge at the end of the first test is used as the initial state of charge of the second test, and the state of charge at the end of the second test is used as the initial state of charge of the third test. In addition, based on a preset coefficient, the product of the first state of charge and the preset coefficient is 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 is used as the third state of charge. This application does not impose any specific restrictions on the value of its initial state of charge, as well as the determination method and value of the preset coefficient.

[0050] Step S240: modifying the initial power mapping table based on the test result to obtain a modified battery power mapping relationship.

[0051] In one embodiment of the present application, the initial power mapping table is corrected based on the test results, including: correcting the initial power mapping table based on any two test results of the first test result, the second test result, and the third test result; or, correcting the initial power mapping table based on the first test result, the second test result, and the third test result.

[0052] It should be noted that the test results are usually defined as qualified and unqualified. When the test result is qualified, it is considered that the power information of the initial power mapping table used in the test is accurate and does not require further correction. If the test result is unqualified, it is necessary to further determine based on the specific test performance whether the power information corresponding to the initial power mapping table needs to be adjusted up or down. The specific downward correction is determined based on the actual test performance and the application environment of the vehicle. Therefore, this application does not make any specific limitations on its specific correction method.

[0053] In a specific embodiment of the present application, according to the test results, it is found that in the short-time power mapping table, the maximum short-time power setting under the conditions of 25°C and SOC of 50% is too high and needs to be adjusted down. Assume that the maximum short-time power is reduced from 100kW to 90kW, and the short-time power mapping table is updated. In addition, for the continuous power mapping table, if no premature voltage drop or other abnormal conditions are found during the test, it can remain unchanged.

[0054] In addition, given that commonly used battery power mapping tables usually include long-term power mapping tables, short-term power mapping tables, and continuous power mapping tables, and the same battery has an intrinsic connection between these three powers. Its long-term power mapping table describes the maximum power that the battery can continuously provide over a long period of time; the short-term power mapping table describes the maximum peak power that the battery can provide in a short period of time; the continuous power mapping table describes the maximum power that the battery can continuously provide within a certain period of time. There is a mutual dependence between these mapping tables, that is, the change of one power will affect the setting of other powers. Therefore, in the method proposed in this application, the short-term power mapping table and the continuous power mapping table can be corrected according to the test results, and the long-term power mapping table can be adjusted accordingly. Specifically, if the short-term power is lowered, the continuous power and long-term power also need to be adjusted accordingly to ensure the performance consistency and safety of the battery throughout its entire use cycle.

[0055] It should be noted that the method proposed in this application can ensure that while correcting the short-time and continuous power mapping tables, the impact on the long-time power mapping table will not be ignored, thereby achieving comprehensive optimization of the entire battery power management system, which 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 is a block diagram of a vehicle battery power mapping relationship correction device shown in an exemplary embodiment of the present application. The device can be applied to Figure 1 The device may also be applicable to other exemplary implementation environments and specifically configured in other devices, and 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] Among them, the data acquisition module 410 is used to obtain an initial power mapping table, and its initial power mapping table records the power of the battery under different temperature conditions and different charge states; the test power determination module 420 is used to adjust the battery of the whole vehicle to the test charge state and test temperature, and obtain the test power corresponding to the test charge state and test temperature based on the initial power mapping table; the discharge test module 430 is used to perform a discharge test on the battery of the whole vehicle based on the test power to obtain the test results, and the test results include qualified and unqualified; the battery power correction module 440 is used to correct the initial power mapping table based on the test results to obtain a corrected battery power mapping relationship.

[0059] It should be noted that the whole vehicle battery power mapping relationship correction device provided in the above embodiment and the whole vehicle battery power mapping relationship correction method provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment, and will not be repeated here. In practical applications, the whole vehicle battery power mapping relationship correction device provided in the above embodiment can distribute the above functions to different functional modules as needed, that is, divide the internal structure of the device into different functional modules to complete all or part of the functions described above, and this is not limited here.

[0060] An embodiment of the present application also provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, and when the one or more programs are executed by one or more processors, the electronic device implements the vehicle battery power mapping relationship correction method provided in the above-mentioned embodiments.

[0061] Figure 5 The structure diagram of the computer system suitable for implementing the electronic device of the embodiment of the present application is shown. It should be noted that: Figure 5 The computer system 500 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present 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 according to the program stored in the read-only memory (ROM) 502 or the program loaded from the storage part 508 to the random access memory (RAM) 503, such as executing the method described in the above embodiment. In the RAM 503, various programs and data required for system operation are also stored. The CPU 501, the ROM 502 and the RAM 503 are connected to each other through the bus 504. The input / output (I / O) interface 505 is also connected to the bus 504.

[0063] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; 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, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the I / O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed so that a computer program read therefrom is installed into the storage section 508 as needed.

[0064] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 509, and / or installed from a removable medium 511. When the computer program is executed by a central processing unit (CPU) 501, various functions defined in the system of the present application are executed.

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

[0066] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0067] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0068] Another aspect of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor of a computer, the computer executes the vehicle battery power mapping relationship correction method as described above. The computer-readable storage medium may be included in the electronic device described in the above embodiment, or may exist independently without being assembled into the electronic device.

[0069] Another aspect of the present application further provides a computer program product or a computer program, which includes a computer instruction stored in a computer-readable storage medium. A processor of a computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes the vehicle battery power mapping relationship correction method provided in each of the above embodiments.

[0070] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A method for correcting vehicle battery power mapping relationship, characterized in that: The method comprises: Acquire an initial power mapping table of a battery cell, wherein the initial power mapping table includes the power of the battery under different temperature conditions and different state of charge conditions; Adjusting the vehicle battery to a test state of charge and a test temperature, and obtaining a test power corresponding to the test state of charge and the test temperature based on the initial power mapping table; Performing a discharge test on the vehicle battery based on the test power to obtain a test result; The initial power mapping table is modified based on the test result.

2. The vehicle battery power mapping relationship correction method according to claim 1, characterized in that: The initial power mapping table at least includes a continuous power mapping table and a short-time power mapping table. Obtaining the test power corresponding to the test state of charge and the test temperature based on the initial power mapping table includes: Determining a continuous test power corresponding to the test state of charge based on the test state of charge and the continuous power mapping table; Based on the test state of charge and the short-time power mapping table, a short-time test power corresponding to the test state of charge is determined.

3. The vehicle battery power mapping relationship correction method according to claim 2 is characterized in that: Obtaining the test power corresponding to the test state of charge and the test temperature based on the initial power mapping table includes: The whole vehicle battery is adjusted to a first test state of charge, a second state of charge, and a third state of charge and the test temperature respectively, and a discharge test is performed on the whole 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, 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.

4. The vehicle battery power mapping relationship correction method according to claim 3 is characterized in that: The initial power mapping table is modified based on the test result, including: 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, The initial power mapping table is modified based on the first test result, the second test result, and the third test result.

5. The vehicle battery power mapping relationship correction method according to claim 4, characterized in that: The vehicle battery is discharged based on the test power, including: Adjusting the vehicle battery to the first test state of charge and the 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 time according to the first continuous test power, and monitoring the voltage of each battery cell during the discharge process; If it is monitored that the voltage of any battery cell is lower than the preset voltage usage lower limit threshold, the first test result is determined to be unqualified.

6. The vehicle battery power mapping relationship correction method according to claim 4, characterized in that: The discharge test of the vehicle battery is performed based on the test power, and further includes: Adjusting the vehicle battery to the second test state of charge and the 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 a second preset time length on the vehicle battery according to the second short-time test power, and monitoring the voltage of each battery cell during the discharge process; If it is monitored that the voltage of any battery cell is lower than the preset voltage usage lower limit threshold, the second test result is determined to be unqualified.

7. The vehicle battery power mapping relationship correction method according to claim 4, characterized in that: Performing a discharge test on the vehicle battery based on the test power also includes: Adjusting the vehicle battery to the third test state of charge and the test temperature; Obtaining a third continuous test power corresponding to the third test state of charge based on the continuous power mapping table, and obtaining a third short-time test power corresponding to the third state of charge based on the short-time power mapping table; Within the predetermined third discharge time, gradually adjusting the vehicle battery from the third short-time test power to the third continuous test power, and monitoring the voltage of each battery cell in real time during the entire discharge process; If it is monitored that the voltage of any battery cell is lower than the preset voltage usage lower limit threshold, the third test result is determined to be unqualified.

8. A vehicle battery power mapping relationship correction device, characterized in that: The device comprises: A data acquisition module, used to obtain an initial power mapping table, wherein the initial power mapping table includes the power of the battery under different temperature conditions and different charge state conditions; A test power determination module, used to adjust the vehicle battery to a test state of charge and a 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, used to perform a discharge test on the vehicle battery based on the test power to obtain a test result, wherein the test result includes a qualified result and a failed result; A battery power correction module is used to correct the initial power mapping table based on the test result.

9. 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 the computer program stored in the memory to implement the vehicle battery power mapping relationship correction method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is used to enable a computer to execute the vehicle battery power mapping relationship correction method as described in any one of claims 1-7.

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