Vehicle power battery power test method and system based on power map table
By applying a test logic strategy based on a power MAP table in the test charging and discharging cabinet, the power of the power battery at the test points is automatically identified and tested in sequence, solving the problems of complex manual operation and large error in the existing technology, and realizing efficient and accurate power battery power testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 安徽得壹能源科技有限公司
- Filing Date
- 2024-12-18
- Publication Date
- 2026-06-23
AI Technical Summary
Existing power battery power testing methods suffer from problems such as complex manual operation, large errors, low efficiency, and low accuracy, resulting in test results deviating from the actual state and failing to effectively detect the power battery's power capability.
A test logic strategy based on a power MAP table is designed and integrated into the test charging and discharging cabinet. It automatically identifies and tests the test points in a set order, and statistically analyzes the data to achieve efficient and accurate power battery power testing.
By employing automated testing logic strategies, human error is avoided, testing efficiency and accuracy are improved, the accurate detection of power battery power capacity is ensured, and time and cost waste is reduced.
Smart Images
Figure CN119716566B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power battery power testing technology, and in particular to a method and system for testing vehicle power battery power based on a power MAP meter. Background Technology
[0002] With the rapid development of the new energy vehicle industry, the power battery and power battery system in the vehicle provide certain key functions. The power capacity of this key function has a significant impact on the user experience during the operation of the vehicle. The power performance of the power battery is related to the starting and acceleration characteristics of the vehicle and is one of the important parameters of the vehicle. Therefore, it is necessary to test the power performance of the power battery to ensure the reliability of the vehicle operation.
[0003] Current power testing methods for power batteries mostly involve manually looking up tables to set the corresponding power and temperature in a test charge / discharge cabinet. However, this testing process involves complex editing of the power battery's operating steps, and manual table lookup carries the risk of errors, such as incorrect parameter input. Once an error occurs, the test needs to be repeated, resulting in wasted time and costs, delays, and the inability to synchronize the product's BOL (Breakpoint in Life) state. This causes the test results to deviate from the actual BOL state, making it impossible to effectively and accurately test the power battery's power capability. Consequently, the testing efficiency and accuracy are low. Summary of the Invention
[0004] To address the shortcomings of the existing technology, this invention provides a method and system for testing the power of vehicle power batteries based on a power MAP table. A specific testing logic strategy is designed and directly integrated into a testing charging / discharging cabinet. This cabinet automatically identifies each test point in the imported power MAP and performs tests on each point sequentially according to a set order. All data collected during the testing process is statistically analyzed and displayed, thus completing the power battery power test. This method enables efficient and accurate testing of the power battery's power capability, avoiding the problems of low testing efficiency and accuracy caused by manual operation.
[0005] In a first aspect, the present invention provides a method for testing the power of a vehicle power battery based on a power MAP meter.
[0006] A power testing method for vehicle power batteries based on a power MAP meter, applied to a charge / discharge testing cabinet, the method includes:
[0007] Based on the imported power MAP table, identify multiple temperature and SOC status test points in the table, and determine the property parameters of the power test; the property parameters include charge / discharge operation mode, mode, and operation time, wherein the mode is the power / current value;
[0008] Based on the identified test points and property parameters, and combined with the selected set capacity method, the power battery of the vehicle under test is tested. Among them, multiple temperature test points are tested in order from high temperature to low temperature, and multiple SOC state test points are tested in different orders according to different charging and discharging operation modes.
[0009] Based on the data obtained from the test and the original data from the power MAP table, the key data of each MAP test point, the capacity value at each temperature, the adjustment capacity value and the operating capacity value in each test step are obtained.
[0010] A further technical solution is that the charging and discharging operation mode includes charging or discharging, which is used to identify the current direction at each test point in the power MAP table;
[0011] The mode is a power / current value, i.e., a P / A value, used to distinguish between power and current in the power MAP table;
[0012] The runtime is used to determine the runtime for the P / A value at each test point.
[0013] A further technical solution involves simultaneously acquiring the highest and lowest single-cell voltages of the power battery of the vehicle under test while identifying the imported power MAP meter.
[0014] A further technical solution is that the set capacity determination method includes: room temperature capacity determination, T-capacity determination, and capacity testing at a specified temperature; wherein, under the room temperature capacity determination and T-capacity determination methods, the discharge capacity determination rate, charging capacity determination rate, and initial charging temperature at the corresponding temperature are extracted and obtained.
[0015] A further technical solution involves selecting different sequences for testing multiple SOC state test points based on the different charging and discharging operation modes, including:
[0016] Under discharge operation mode, multiple SOC test points are tested in order from the highest SOC state to the lowest SOC state.
[0017] In charging operation mode, multiple SOC test points are selected in order from the lowest SOC state to the highest SOC state.
[0018] A further technical solution involves testing the power battery of the vehicle under test at multiple SOC (State of Charge) test points under discharge operation, including:
[0019] The highest temperature was selected for the volumetric test.
[0020] During testing, the tests are carried out sequentially starting from the highest self-discharge SOC state. After each test point is completed, the actual capacity value of that test point is accumulated and adjusted downward to the next SOC state test point and allowed to adapt to the temperature before the next SOC state test point is tested.
[0021] After completing the test at the lowest SOC state test point under the highest temperature, venting is performed and the difference between the remaining capacity of the adjusted SOC state and the theoretical value is confirmed to determine the deviation range of the current test round.
[0022] Based on the highest temperature constant volume test method, conduct constant volume tests at the next temperature test point until the lowest temperature test point is completed.
[0023] A further technical solution involves testing the power battery of the vehicle under test at multiple SOC (State of Charge) test points under charging operation, including:
[0024] The highest temperature was selected for the volumetric test.
[0025] During testing, the test points are tested sequentially starting from the lowest SOC state of self-charging. After each test point is completed, the actual capacity value of that test point is accumulated and adjusted upward to the test point of the previous SOC state and allowed to adapt to the temperature before the test point of the next SOC state is tested.
[0026] After completing the test at the lowest SOC state test point under the highest temperature, venting is performed and the difference between the remaining capacity of the adjusted SOC state and the theoretical value is confirmed to determine the deviation range of the current test round.
[0027] Based on the highest temperature constant volume test method, conduct constant volume tests at the next temperature test point until the lowest temperature test point is completed.
[0028] Secondly, the present invention provides a vehicle power battery power testing system based on a power MAP meter.
[0029] A vehicle power battery power testing system based on a power MAP meter, applied to a charge / discharge testing cabinet, the system includes:
[0030] The data acquisition module is used to identify multiple temperature and SOC status test points in the imported power MAP table and determine the property parameters of the power test; the property parameters include charge / discharge operation mode, mode, and operation time, wherein the mode is the power / current value;
[0031] The testing module is used to perform power tests on the vehicle's power battery based on the identified test points and property parameters, combined with the selected set capacity method. Among them, multiple temperature test points are tested in order from high temperature to low temperature, and multiple SOC state test points are tested in different orders according to different charging and discharging operation modes.
[0032] The output module is used to obtain key data for each MAP test point, capacity values at each temperature, adjustment capacity values and operating capacity values in each test step, based on the test data and raw data from the power MAP table.
[0033] Thirdly, the present invention also provides an electronic device, including a memory and a processor, and computer instructions stored in the memory and running on the processor, wherein the computer instructions, when executed by the processor, perform the steps of the method described in the first aspect.
[0034] Fourthly, the present invention also provides a computer-readable storage medium for storing computer instructions, which, when executed by a processor, perform the steps of the method described in the first aspect.
[0035] The above one or more technical solutions have the following beneficial effects:
[0036] 1. This invention provides a method and system for testing the power of a vehicle power battery based on a power MAP table. A specific test logic strategy is designed and directly integrated into a test charging and discharging cabinet. The test charging and discharging cabinet automatically identifies each test point in the imported power MAP and performs tests on each test point in a set order. All data during the test process are statistically analyzed and displayed, thereby completing the power battery power test. This invention enables efficient and accurate testing of the power battery power capability, avoiding the problems of low testing efficiency and accuracy caused by manual operation.
[0037] 2. On the one hand, this invention directly imports the power MAP and its test logic into the test charging and discharging cabinet, which then identifies the corresponding test points and performs unified testing on several power batteries, avoiding the drawbacks of manual table lookup operations. On the other hand, by unifying all test points in the same test program, it effectively reduces the time spent manually adjusting the ambient temperature, compiling test programs for individual points, and starting the corresponding programs, avoiding wasted time and effectively improving test efficiency and accuracy. Attached Figure Description
[0038] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.
[0039] Figure 1 This is a flowchart of the vehicle power battery power testing method based on a power MAP table as described in an embodiment of the present invention;
[0040] Figure 2 This is a schematic diagram of the power / current MAP import template in an embodiment of the present invention;
[0041] Figure 3 This is a schematic diagram of the power / current MAP export template in an embodiment of the present invention. Detailed Implementation
[0042] It should be noted that the following detailed descriptions are exemplary and are intended only to describe specific embodiments and to provide further explanation of the invention, and are not intended to limit the scope of exemplary embodiments of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0043] Example 1
[0044] This embodiment provides a method for testing the power of a vehicle's power battery based on a power MAP meter, applied to a charge / discharge testing cabinet. The method is as follows: Figure 1 As shown, it includes:
[0045] The power map is acquired and imported into the charge / discharge testing cabinet. Multiple temperature and SOC status test points in the power map are identified, and the property parameters of the power map are determined. The property parameters include the charge / discharge operation mode, mode, and operation time.
[0046] Based on the identified test points and property parameters, and combined with the selected capacity setting method, the actual capacity of the power battery of the vehicle under test is tested. Among them, multiple temperature test points are tested in order from high temperature to low temperature, and multiple SOC state test points are tested in different orders according to different charging and discharging operation modes.
[0047] Based on the test data and raw power MAP data, the adjustment capacity value and operating capacity value are obtained when adjusting each SOC test point.
[0048] The following content provides a more detailed description of the vehicle power battery power testing method based on the power MAP table proposed in this embodiment.
[0049] Step S1: Based on the imported power MAP table, identify multiple temperature and SOC status test points in the table, and determine the property parameters of the power test; the property parameters include charge / discharge operation mode, mode, and operation time, wherein the mode is the power / current value.
[0050] Specifically, a chart recognition function is added to the charge / discharge test cabinet's process setting program to obtain the power MAP table and import it into the charge / discharge test cabinet. In this way, the charge / discharge test cabinet can identify multiple temperature and SOC status test points in the power MAP table. Based on the identified test points, the battery SOC can be adjusted sequentially (whether to adjust the SOC and the SOC adjustment method can be selected according to the actual situation) and the ambient temperature can be adjusted.
[0051] Furthermore, the aforementioned charge / discharge testing cabinet can also identify the power test parameters in the power MAP table. Its identification logic is as follows:
[0052] In this embodiment, a power MAP meter is used, which is a power / current MAP meter. The power MAP meter template imported by the detection cabinet is as follows: Figure 2 As shown, the property parameters in the power MAP template are identified. The first row indicates the charging or discharging operation mode, used to identify the current direction at each test point in the power MAP. The second row indicates the mode, including the power / current value (i.e., P / A value), used to distinguish between power and current in the power MAP. The third row indicates the running time, used to determine the running time of the P / A value at each test point. These three options can be designed simultaneously during the design process; for example, the corresponding property selection can be made in the pop-up window options during the import phase before importing the power MAP. Additionally, Figure 2 The number of rows and columns shown in the template is for illustrative purposes only, and this embodiment does not define the number of rows and columns in a fixed way.
[0053] Furthermore, through the above method, the charge / discharge testing cabinet can identify the SOC state of the row corresponding to temperature in the first column of the power MAP table. During charging, it adjusts its SOC state by integrating ampere-hours to provide a capacity value or the actual capacity obtained from the test (performing a temperature T-scale determination).
[0054] In addition, during the above testing process, the charging and discharging cabinet also simultaneously identifies the highest and lowest individual cell voltages of the vehicle's power battery under test (default charging identification). Specifically, the battery system testing cabinet can find the corresponding variables (i.e., the highest and lowest individual cell voltages) by filtering in the product DBC. Furthermore, the highest and lowest individual cell voltages can be manually selected within the charging and discharging cabinet. However, the individual cell testing cabinet does not need to determine this parameter.
[0055] Step S2: Based on the identified test points and property parameters, and in conjunction with the selected capacity setting method, perform power testing on the power battery of the vehicle under test; wherein, multiple temperature test points are tested in order from high temperature to low temperature, and multiple SOC state test points are tested in different orders according to different charging and discharging operation modes.
[0056] Specifically, the test operation logic of the charge / discharge testing cabinet is as follows:
[0057] During the testing process, the charge / discharge testing cabinet first performs a capacity test on the power battery under test according to the set options (i.e., the pre-set capacity determination method), including: room temperature capacity determination, temperature T capacity determination, capacity test at a specified temperature, etc., thereby obtaining the actual capacity of the power battery. Among them, capacity determination refers to obtaining its actual capacity by charging and discharging at a certain temperature.
[0058] Furthermore, considering that capacity testing at a specified temperature directly provides users with a certain constant value, and they do not need to conduct capacity testing, in addition to capacity testing at a specified temperature, for other capacity-limiting methods such as constant capacity at room temperature and constant capacity at temperature T, the charge and discharge testing cabinet will prompt users to submit the discharge capacity limit, charging limit, and initial charging temperature at the corresponding temperature in advance, that is, to obtain the discharge capacity limit, charging capacity limit, and initial charging temperature at the corresponding temperature in advance.
[0059] Secondly, the charge / discharge testing cabinet identifies the test points (hereinafter referred to as points) through the above step S1, determines and selects the corresponding measurement points, such as selecting all or selecting some points.
[0060] Then, the power battery of the vehicle under test is tested. During this process, depending on the charging and discharging operation mode, multiple SOC test points are tested in different sequences, including: in the discharging operation mode, multiple SOC test points are tested in order from the highest SOC to the lowest SOC; in the charging operation mode, multiple SOC test points are tested in order from the lowest SOC to the highest SOC. The specific testing process is as follows:
[0061] (1) Under discharge operation mode, perform power testing on the power battery of the vehicle under test, including:
[0062] When the charge / discharge testing cabinet is in full operation mode, the constant capacity test method is selected first. In this embodiment, the highest temperature T1 is selected for constant capacity test to obtain the actual capacity. Then, the discharge starts from the highest SOC state and tests are carried out sequentially at each temperature-SOC state point. Each test point is completed after a set time, and the P / A value at each test point is obtained. During the test, after the test of the current SOC state test point is completed, the program in the testing cabinet will accumulate the actual capacity value of the test point and adjust it down to the next SOC state test point and adapt to the temperature.
[0063] Specifically, taking the SOC states in the MAP table under discharge operation mode as examples (100%, 50%, 30%), the following explanation is provided: At the test point of the highest temperature T1 and the highest SOC state of 100%, a discharge is performed at the set power or current for a set time period to obtain the final discharge capacity Q1. Afterwards, the program in the testing cabinet will continue to adjust to the next test point, i.e., the highest temperature T1 and the SOC state of 50%. However, because of the discharge capacity Q1 generated during the test at 100%, the SOC of the power battery is not directly adjusted downwards by 50%. Instead, the actual required adjustment capacity value is recalculated based on the discharge capacity Q1: Required adjustment capacity value for the testing cabinet = Discharge capacity value Q0 obtained from the capacity test * (1 - (1 - 50%)) - Discharge capacity value Q1 generated in the test steps. In this way, the actual capacity value at each test point is accumulated and, after calculation, adjusted downwards to the next SOC state test point, thus ensuring the accuracy of the test.
[0064] Next, the next SOC state test point is tested. After completing the test at the lowest SOC state point at the highest temperature, the battery is discharged and the difference between the remaining SOC state capacity and the theoretical value is confirmed to determine the deviation range of the current test round. Specifically, using the above-mentioned discharge MAP detection method, when the battery is discharged to 5% SOC and the corresponding test power point is completed, the theoretical SOC should be 3% (assumed value). If the capacity value generated by discharging to the cutoff voltage of the battery or battery system accounts for 3% of Q0, it means that there is no deviation in this round of testing. If it is 2% or other values, it means that there is a certain deviation in all tested points. This deviation will be simultaneously informed to the user in the final result.
[0065] Similarly, based on the constant volume test method for the highest temperature T1, the constant volume test is carried out at the next temperature T2 test point until the constant volume test at the lowest temperature test point is completed.
[0066] (2) Under charging operation mode, the actual capacity of the power battery of the vehicle under test is tested, including:
[0067] When the charging / discharging cabinet is in full operating mode, the highest temperature T1 is first selected for a constant capacity test to obtain the actual capacity. Specifically, for adjusting the State of Charge (SOC) during charging, the charging / discharging cabinet supports pre-inputting the charge / discharge energy efficiency ratio for the corresponding SOC state. When adjusting the SOC, the cabinet adjusts the corresponding discharge capacity by converting it to its theoretical capacity value based on the charge / discharge energy efficiency. Specifically, since SOC adjustment is usually performed using discharge, and the charging MAP is a continuously increasing adjustment process, charging and discharging are not equal values (determined by the characteristics of the battery product). This results in charge / discharge energy or capacity efficiency where the charging capacity is higher than the discharging capacity. Therefore, for each corresponding SOC capacity adjustment, the original discharge capacity value is charged by multiplying it by the corresponding discharge-to-charge ratio (i.e., charge / discharge energy efficiency).
[0068] During testing, tests are conducted sequentially starting from the lowest SOC state after self-charging. After each test point is completed, the actual capacity value of that test point is accumulated and adjusted upwards to the previous SOC state test point and allowed to adapt to the temperature before proceeding to the next SOC state test point. After completing the test at the lowest SOC state test point at the highest temperature, the system is discharged and the difference between the remaining capacity of the adjusted SOC state and the theoretical capacity is confirmed to determine the deviation range of the current round of testing.
[0069] Similarly, based on the constant volume test method of the highest temperature T1, the constant volume test of the next temperature T2 test point is carried out until the constant volume test of the lowest temperature test point is completed.
[0070] Step S3: Based on the data obtained from the test and the original data of the power MAP table, obtain the key data of each MAP test point, the capacity value at each temperature, the adjustment capacity value and the operating capacity value in each test step.
[0071] Specifically, the calculation of the results for the charge / discharge testing cabinet is as follows:
[0072] (1) The charge / discharge testing cabinet filters out key data from the test end data of each point in the raw data. This key data refers to the single-section data of each MAP test point, including, for example... Figure 3 The running time and the minimum / maximum voltage of the single cell at the end of the running process are shown. The discharge MAP automatically takes the minimum voltage of the single cell, and the charging MAP automatically takes the maximum voltage of the single cell.
[0073] (2) The charge and discharge test cabinet identifies the capacity value corresponding to each temperature through the raw data, including the set capacity value that can be directly set to the corresponding temperature without performing a fixed capacity test, and the measured capacity value obtained by performing a fixed capacity test at each temperature according to the steps.
[0074] (3) The charge / discharge testing cabinet identifies the adjusted capacity value and the operating capacity value of the test point at each step of SOC adjustment using raw data, facilitating confirmation of the SOC adjustment status by testing personnel. The adjusted capacity value refers to the single-step capacity adjustment of SOC, while the operating capacity value refers to the capacity generated by the power or current test. Furthermore, based on the capacity Q0 at the corresponding temperature, the adjusted capacity value = (Pre-adjustment test SOC point * Q0 - Post-adjustment test SOC point * Q0) * Q0 - Operating capacity value; if it is a charging process, then the adjusted capacity value = (Pre-adjustment test SOC point * Q0 - Post-adjustment test SOC point * Q0) * Q0 + Operating capacity value. In practice, since the charging / discharging testing cabinet usually has a defined ± distinction between charging and discharging capacities, the formula here does not need to be adjusted.
[0075] In this way, the charge and discharge test cabinet performs joint debugging and environmental chamber adjustment through a pre-set logic strategy, thereby completing the test. This method can effectively shorten the test cycle, speed up the test progress, and avoid test errors.
[0076] Example 2
[0077] This embodiment provides a vehicle power battery power testing system based on a power MAP meter, applied to a charge / discharge testing cabinet. The system includes:
[0078] The data acquisition module is used to identify multiple temperature and SOC status test points in the imported power MAP table and determine the property parameters of the power test; the property parameters include charge / discharge operation mode, mode, and operation time, wherein the mode is the power / current value;
[0079] The testing module is used to perform power tests on the vehicle's power battery based on the identified test points and property parameters, combined with the selected set capacity method. Among them, multiple temperature test points are tested in order from high temperature to low temperature, and multiple SOC state test points are tested in different orders according to different charging and discharging operation modes.
[0080] The output module is used to obtain key data for each MAP test point, capacity values at each temperature, adjustment capacity values and operating capacity values in each test step, based on the test data and raw data from the power MAP table.
[0081] Example 3
[0082] This embodiment provides an electronic device, including a memory and a processor, as well as computer instructions stored in the memory and running on the processor. When the processor executes the computer instructions, it completes the steps in the vehicle power battery power testing method based on the power MAP table as described above.
[0083] Example 4
[0084] This embodiment also provides a computer-readable storage medium for storing computer instructions, which, when executed by a processor, complete the steps in the vehicle power battery power testing method based on the power MAP table as described above.
[0085] The steps and methods involved in Embodiments 2 to 4 above correspond to those in Embodiment 1. For specific implementation details, please refer to the relevant description section of Embodiment 1. The term "computer-readable storage medium" should be understood as a single medium or multiple media including one or more instruction sets; it should also be understood as including any medium capable of storing, encoding, or carrying an instruction set for execution by a processor and enabling the processor to perform any of the methods in this invention.
[0086] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computer devices. Optionally, they can be implemented using computer-executable program code, thereby allowing them to be stored in a storage device for execution by a computer device, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. The present invention is not limited to any particular combination of hardware and software.
[0087] The above description is only a preferred embodiment of the present invention. Although the specific implementation of the present invention has been described in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that, based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the present invention.
Claims
1. A method for testing the power of a vehicle's power battery based on a power MAP meter, applied to a charge / discharge testing cabinet, characterized in that, include: Based on the imported power MAP table, identify multiple temperature and SOC status test points in the table, and determine the property parameters of the power test; the property parameters include charge / discharge operation mode, mode, and operation time, wherein the mode is the power / current value; A chart recognition function is added to the charge and discharge test cabinet process setting program to obtain the power MAP table and import it into the charge and discharge test cabinet. In this way, the charge and discharge test cabinet can identify multiple temperature and SOC status test points in the power MAP table. Based on the identified test points, the battery SOC and ambient temperature can be adjusted in sequence. Based on the identified test points and property parameters, and combined with the selected set capacity method, the power battery of the vehicle under test is tested. Among them, multiple temperature test points are tested in order from high temperature to low temperature, and multiple SOC state test points are tested in different orders according to different charging and discharging operation modes. In charging operation mode, multiple SOC test points are selected in order from the lowest SOC state to the highest SOC state. Under charging operation, multiple SOC (State of Charge) test points are performed on the power battery of the vehicle under test, including: The highest temperature was selected for the constant volume test; During testing, the test points are tested sequentially starting from the lowest SOC state of self-charging. After each test point is completed, the actual capacity value of that test point is accumulated and adjusted upward to the test point of the previous SOC state and allowed to adapt to the temperature before the test point of the next SOC state is tested. After completing the test at the lowest SOC state test point under the highest temperature, venting is performed and the difference between the remaining capacity of the adjusted SOC state and the theoretical value is confirmed to determine the deviation range of the current test round. Based on the highest temperature constant volume test method, conduct constant volume tests at the next temperature test point until the lowest temperature test point is completed. Under discharge operation mode, multiple SOC test points are tested in order from the highest SOC state to the lowest SOC state. Under discharge operation, multiple SOC (State of Charge) test points are performed on the power battery of the vehicle under test, including: The highest temperature was selected for the constant volume test; During testing, the tests are carried out sequentially starting from the highest self-discharge SOC state. After each test point is completed, the actual capacity value of that test point is accumulated and adjusted downward to the next SOC state test point and allowed to adapt to the temperature before the next SOC state test point is tested. After completing the test at the lowest SOC state test point under the highest temperature, venting is performed and the difference between the remaining capacity of the adjusted SOC state and the theoretical value is confirmed to determine the deviation range of the current test round. Based on the highest temperature constant volume test method, conduct constant volume tests at the next temperature test point until the lowest temperature test point is completed. Based on the data obtained from the test and the original data from the power MAP table, the key data of each MAP test point, the capacity value at each temperature, the adjustment capacity value and the operating capacity value in each test step are obtained. For adjusting the SOC during charging, the charge / discharge testing cabinet supports pre-inputting the charge / discharge energy efficiency ratio for the corresponding SOC state. When adjusting the SOC state during charging, the testing cabinet will adjust the corresponding discharge capacity according to the theoretical capacity value calculated based on the charge / discharge energy efficiency.
2. The method for testing the power of a vehicle power battery based on a power MAP meter as described in claim 1, characterized in that, The charging and discharging operation mode includes charging or discharging, which is used to identify the current direction at each test point in the power MAP table; The mode is a power / current value, i.e., a P / A value, used to distinguish between power and current in the power MAP table; The runtime is used to determine the runtime for the P / A value at each test point.
3. The method for testing the power of a vehicle power battery based on a power MAP meter as described in claim 1, characterized in that, When identifying the imported power MAP table, the highest and lowest single-cell voltages of the power battery of the vehicle under test are simultaneously obtained.
4. The method for testing the power of a vehicle power battery based on a power MAP meter as described in claim 1, characterized in that, The set capacity setting method includes: room temperature capacity setting, T-capacity setting, and capacity testing at a specified temperature; wherein, under the room temperature capacity setting and T-capacity setting methods, the discharge capacity setting rate, charging capacity setting rate, and initial charging temperature at the corresponding temperature are extracted and obtained.
5. A vehicle power battery power testing system based on a power MAP meter, applied to a charge / discharge testing cabinet, characterized in that, include: The data acquisition module is used to identify multiple temperature and SOC status test points in the imported power MAP table and determine the property parameters of the power test; the property parameters include charge / discharge operation mode, mode, and operation time, wherein the mode is the power / current value; A chart recognition function is added to the charge and discharge test cabinet process setting program to obtain the power MAP table and import it into the charge and discharge test cabinet. In this way, the charge and discharge test cabinet can identify multiple temperature and SOC status test points in the power MAP table. Based on the identified test points, the battery SOC and ambient temperature can be adjusted in sequence. The testing module is used to perform power tests on the vehicle's power battery based on the identified test points and property parameters, combined with the selected set capacity method. Among them, multiple temperature test points are tested in order from high temperature to low temperature, and multiple SOC state test points are tested in different orders according to different charging and discharging operation modes. In charging operation mode, multiple SOC test points are selected in order from the lowest SOC state to the highest SOC state. Under charging operation, multiple SOC (State of Charge) test points are performed on the power battery of the vehicle under test, including: The highest temperature was selected for the constant volume test; During testing, the test points are tested sequentially starting from the lowest SOC state of self-charging. After each test point is completed, the actual capacity value of that test point is accumulated and adjusted upward to the test point of the previous SOC state and allowed to adapt to the temperature before the test point of the next SOC state is tested. After completing the test at the lowest SOC state test point under the highest temperature, venting is performed and the difference between the remaining capacity of the adjusted SOC state and the theoretical value is confirmed to determine the deviation range of the current test round. Based on the highest temperature constant volume test method, conduct constant volume tests at the next temperature test point until the lowest temperature test point is completed. Under discharge operation mode, multiple SOC test points are tested in order from the highest SOC state to the lowest SOC state. Under discharge operation, multiple SOC (State of Charge) test points are performed on the power battery of the vehicle under test, including: The highest temperature was selected for the constant volume test; During testing, the tests are carried out sequentially starting from the highest self-discharge SOC state. After each test point is completed, the actual capacity value of that test point is accumulated and adjusted downward to the next SOC state test point and allowed to adapt to the temperature before the next SOC state test point is tested. After completing the test at the lowest SOC state test point under the highest temperature, venting is performed and the difference between the remaining capacity of the adjusted SOC state and the theoretical value is confirmed to determine the deviation range of the current test round. Based on the highest temperature constant volume test method, conduct constant volume tests at the next temperature test point until the lowest temperature test point is completed. The output module is used to obtain key data for each MAP test point, capacity values at each temperature, adjustment capacity values and operating capacity values in each test step based on the test data and raw data from the power MAP table. For adjusting the SOC during charging, the charge / discharge testing cabinet supports pre-inputting the charge / discharge energy efficiency ratio for the corresponding SOC state. When adjusting the SOC state during charging, the testing cabinet will adjust the corresponding discharge capacity according to the theoretical capacity value calculated based on the charge / discharge energy efficiency.
6. An electronic device, characterized in that, It includes a memory and a processor, as well as computer instructions stored in the memory and running on the processor. When the processor executes the computer instructions, it completes the steps of a vehicle power battery power testing method based on a power MAP table as described in any one of claims 1-4.
7. A computer-readable storage medium, characterized in that, Used to store computer instructions, which, when executed by a processor, complete the steps of a vehicle power battery power testing method based on a power MAP table as described in any one of claims 1-4.