Battery cell test method, electronic equipment and storage medium
By conducting pulse test and charge and discharge performance test on the battery cell set to be tested, combined with magnification and long cycle testing, the problem that existing battery cell testing solutions require a large number of battery cells and manpower is solved, and the testing efficiency is improved.
Patent Information
- Application Number
- CN202411827527.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-03-11
AI Technical Summary
The existing battery cell testing solution requires a large number of battery cells to support and requires a large amount of manpower to process the test data, resulting in low testing efficiency.
By performing pulse tests on the set of cells to be tested, selecting a preset number of cells for pulse charge and discharge performance testing, and performing magnification tests and long cycle tests based on the test results to reduce the number of cells to be tested.
It reduces manpower and physical consumption and improves the efficiency of battery cell testing.
Smart Images
Figure CN119596148A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of battery testing, and in particular to a battery cell testing method, an electronic device, and a storage medium. Background Art
[0002] The testing of energy storage batteries can be divided into initial testing, short-term testing, long-term testing and safety testing, among which long-term testing includes cycle testing and storage testing. The initial test is mainly used to detect the initial available energy and DCR of the battery, which is a necessary test for various battery cells. Generally speaking, different tests will use different battery cells, such as 2 battery cells for initial energy detection, 2 cells for HPPC testing (testing battery DCR), and two cells for short-term rate testing at different temperatures and rates. Long-term testing and storage testing also need to be tested at different temperatures, rates and voltage ranges.
[0003] It can be seen that the current battery cell testing solution requires a large number of battery cells to support it, and also requires a lot of manpower to process the test data. When there are many types of battery cells that need to be tested, it will take a lot of manpower and physical effort, and the test efficiency is low. Summary of the invention
[0004] The embodiments of the present application provide a battery cell testing method, an electronic device, and a storage medium, which can reduce the manpower and physical effort consumed in battery cell testing and improve the efficiency of battery cell testing.
[0005] The present application provides a battery cell testing method, including:
[0006] Performing pulse testing on each battery cell to be tested in the battery cell set to be tested;
[0007] Selecting a preset number of cells to be tested from the cells to be tested after the pulse test, and performing a pulse charge and discharge performance test on the selected cells to be tested;
[0008] According to the preset strategy and the pulse charge and discharge performance test results, the rate test is performed on each of the cells to be tested;
[0009] A long cycle test is performed on each of the cells to be tested based on the rate test results.
[0010] Optionally, in some embodiments of the present application, the pulse testing of each battery cell to be tested in the battery cell set to be tested includes:
[0011] Charging each battery cell to be tested in the battery cell set to a rated voltage corresponding to the battery cell to be tested;
[0012] According to a preset test environment, the discharge amount of the battery cell to be tested is tested at different discharge times until the battery cell to be tested has a cut-off voltage corresponding to the battery cell to be tested.
[0013] Optionally, in some embodiments of the present application, selecting a preset number of cells to be tested from the cells to be tested after the pulse test, and performing a pulse charge and discharge performance test on the selected cells to be tested, comprises:
[0014] Selecting a preset number of cells to be tested from the cells to be tested after the pulse test;
[0015] The pulse charge and discharge performance test is performed on the selected battery cells under multiple test temperatures.
[0016] Optionally, in some embodiments of the present application, the pulse charge and discharge performance test of the selected battery cells to be tested at multiple test temperatures includes:
[0017] Adjust the power state of the selected battery cell to be tested to a preset power state;
[0018] At each test temperature, at least one charge-discharge cycle is performed on the battery cell to be tested that is adjusted to a preset state of charge.
[0019] Optionally, in some embodiments of the present application, the method of performing a rate test on each of the cells to be tested according to a preset strategy and a pulse charge and discharge performance test result includes:
[0020] According to the pulse charge and discharge performance test result, determining that the battery cell to be tested that has been subjected to the pulse charge and discharge performance test is the first battery cell, and determining that the battery cell to be tested that has not been subjected to the pulse charge and discharge performance test is the second battery cell;
[0021] The first battery cell and part of the second battery cell are rate tested according to a preset strategy.
[0022] Optionally, in some embodiments of the present application, performing a rate test on the first battery cell and part of the second battery cells according to a preset strategy includes:
[0023] Determine a plurality of preset test temperatures and a plurality of discharge rates of the tests corresponding to the preset strategy;
[0024] A preset number of second battery cells are selected from the second battery cells, and rate tests are performed on the first battery cells and the selected second battery cells based on a plurality of preset test temperatures and a plurality of test discharge rates.
[0025] Optionally, in some embodiments of the present application, the performing a long cycle test on each of the cells to be tested based on the rate test condition includes:
[0026] Determine the test parameters for rate testing;
[0027] According to the test parameters and rate test conditions, a long cycle test is performed on each of the cells to be tested.
[0028] Optionally, in some embodiments of the present application, performing a long cycle test on each of the cells to be tested according to the test parameters and the rate test conditions includes:
[0029] According to the rate test result, the second battery cell which has not been subjected to the rate test is determined as the third battery cell;
[0030] performing a long cycle test on the first battery cell, the second battery cell and the third battery cell respectively according to the test parameters, and;
[0031] A long cycle test with a preset discharge depth is performed on the third battery cell at different temperatures.
[0032] Correspondingly, the present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the steps of any of the above methods when executing the program.
[0033] The present application also provides a computer-readable storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the steps of any of the above methods are implemented.
[0034] The embodiment of the present application provides a battery cell testing method, an electronic device, and a storage medium. After pulse testing each battery cell to be tested in a battery cell set to be tested, a preset number of battery cells to be tested are selected from the battery cells to be tested after the pulse test, and a pulse charge and discharge performance test is performed on the selected battery cells to be tested. Then, according to a preset strategy and the results of the pulse charge and discharge performance test, a rate test is performed on each battery cell to be tested. Finally, based on the rate test results, a long cycle test is performed on each battery cell to be tested. The battery cell testing scheme provided by the present application is to select a preset number of battery cells to be tested from the battery cells to be tested after the pulse test to perform a pulse charge and discharge performance test, and according to the preset strategy and the results of the pulse charge and discharge performance test, perform a rate test and a long cycle test in sequence. Therefore, when testing multiple different battery cells, the number of battery cells that need to be tested can be reduced, and the consumption of manpower and physical energy can be reduced, thereby improving the efficiency of battery cell testing. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0036] Figure 1 It is a flow chart of a battery cell testing method provided in an embodiment of the present application;
[0037] Figure 2 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.
[0039] Embodiments of the present application provide a battery cell testing method, device, electronic device, and storage medium.
[0040] Among them, the battery cell testing device can be specifically integrated in a terminal, the terminal can include a tablet computer or a personal computer (PC), the terminal can establish a wired or wireless connection with a server, the server can include an independently running server or a distributed server, and can also include a server cluster composed of multiple servers.
[0041] It should be noted that the order of description of the following embodiments is not intended to limit the priority order of the embodiments.
[0042] A battery cell testing method comprises: performing a pulse test on each battery cell to be tested in a battery cell set to be tested; selecting a preset number of battery cells to be tested from the battery cells to be tested after the pulse test, and performing a pulse charge and discharge performance test on the selected battery cells to be tested; performing a rate test on each battery cell to be tested according to a preset strategy and a result of the pulse charge and discharge performance test; and performing a long cycle test on each battery cell to be tested based on the rate test result.
[0043] See also Figure 1 , Figure 1 A schematic diagram of a cell testing method provided in an embodiment of the present application. The specific process of the cell testing method may be as follows:
[0044] 101. Perform a pulse test on each battery cell to be tested in the battery cell set to be tested.
[0045] Pulse testing is an experimental method for evaluating battery performance. It tests the dynamic response and long-term stability of the battery by simulating the charge and discharge patterns of the battery in actual use.
[0046] For example, charge all cells to be tested to 100% SOC (State of Charge). Then, control the test environment temperature at 20°C, use the battery test equipment, apply a 10-second 1C discharge pulse to the cell, and then let the cell rest for 5 minutes. During each pulse cycle, record the voltage, current, internal resistance, and temperature of the cell. Record the test data of each cell to be tested, including the voltage at the beginning and end of each pulse cycle, and any abnormal temperature increase.
[0047] Optionally, in some embodiments of the present application, the step of “performing a pulse test on each battery cell to be tested in the battery cell set to be tested” may specifically include:
[0048] Charging each battery cell to be tested in the battery cell set to a rated voltage corresponding to the battery cell to be tested;
[0049] According to the preset test environment, the discharge amount of the tested cell when discharged to the cut-off voltage corresponding to the tested cell is tested under different discharge time.
[0050] For example, specifically, all 100 cells are charged to 100% SOC, and the test environment temperature is controlled at 20° C. Then, the RPT test is performed as follows:
[0051] 0.25P RPT test:
[0052] Discharge all 100 cells at a discharge rate of 0.25P and record the capacity and DCR within 2 hours. For example, if the nominal capacity of a cell is 100Ah, the discharge current of 0.25P is 25A. Record the total amount of electricity discharged and the change in internal resistance of each cell within 2 hours.
[0053] 0.5P RPT test:
[0054] Discharge the same 100 cells at a discharge rate of 0.5P, and record the capacity and DCR (Direct Current Resistance) within 4 hours. For example, using the same cells mentioned above, the 0.5P discharge current is 50A. Record the total amount of electricity discharged and the change in internal resistance of each cell within 4 hours.
[0055] It should be noted that 0.25P RPT (Repetitive Pulse Test) refers to a repetitive pulse test at 0.25 times the rated capacity (C-rate) of the battery, and "P" represents the nominal capacity of the battery, that is, the rated ampere-hour (Ah) of the battery; 0.5P RPT (Repetitive Pulse Test) refers to a repetitive pulse test at 0.5 times the rated capacity (C-rate) of the battery. 0.5P means that the discharge current is 50% of the nominal capacity of the battery. For example, if the nominal capacity of a battery is 100Ah, then the discharge current of 0.5P is 50A (100Ah*0.5=50A).
[0056] 102. Select a preset number of cells to be tested from the cells to be tested after the pulse test, and perform a pulse charge and discharge performance test on the selected cells to be tested.
[0057] The Hybrid Pulse Power Characterization (HPPC) test is used to evaluate the dynamic charge and discharge performance and internal resistance of the battery. This test simulates the power requirements of the battery in actual use by applying a series of specific charge and discharge pulses to obtain the power characteristics and status information of the battery. It includes low-current and high-current charge and discharge pulses to evaluate the performance of the battery under different power requirements. Specifically, the battery is charged to a full state or a specific SOC. In a controlled test environment, a series of low-current and high-current charge and discharge pulses are applied to the battery. The voltage, current, internal resistance, temperature and other data of each pulse cycle are recorded. Finally, the voltage response and internal resistance changes of the battery are analyzed to evaluate the charge and discharge efficiency and thermal stability of the battery.
[0058] Optionally, in some embodiments of the present application, the step of “selecting a preset number of cells to be tested from the cells to be tested after the pulse test, and performing a pulse charge and discharge performance test on the selected cells to be tested” may specifically include:
[0059] Selecting a preset number of cells to be tested from the cells to be tested after the pulse test;
[0060] The pulse charge and discharge performance test is performed on the selected battery cells under multiple test temperatures.
[0061] For example, select a certain number of cells from the cells to be tested that have been pulse tested for more in-depth HPPC testing. Determine the temperature points to be tested, such as 0°C, 25°C, 40°C, etc. Prepare the corresponding constant temperature box or environmental control room to ensure that the test can be carried out at the required temperature. Place the selected cells to be tested in the constant temperature box, let the cells reach the required test temperature, and keep it for a certain time to ensure temperature balance. For each temperature point, apply low-current and high-current charge and discharge pulses to the cells according to the standard procedure of HPPC testing. Record the HPPC test data of each cell at different temperatures, including voltage changes, internal resistance and temperature before and after the pulse.
[0062] Optionally, in some embodiments of the present application, the step of “performing a pulse charge and discharge performance test on the selected battery cells to be tested at multiple test temperatures” may specifically include:
[0063] Adjust the power state of the selected battery cell to be tested to a preset power state;
[0064] At each test temperature, at least one charge-discharge cycle is performed on the battery cell to be tested that is adjusted to a preset state of charge.
[0065] Adjust the state of charge of the selected cells to be tested to 1000%. Then, place the cells in a constant temperature chamber to allow the cells to reach and maintain the required test temperature. At each test temperature, perform a complete charge cycle on the cells. This may include constant current charging to a preset upper voltage limit, followed by constant voltage charging until the current drops below a certain threshold. After charging is complete, perform a complete discharge cycle. For example, constant current discharge to a preset lower voltage limit.
[0066] 103. According to the preset strategy and the pulse charge and discharge performance test results, perform rate test on each battery cell to be tested.
[0067] Rate testing is an important test in battery performance evaluation. It is used to determine the behavior and performance of the battery at different discharge and charge rates. Specifically, the battery cells are charged to the rated voltage to ensure that all cells are in the same initial state. Determine the discharge and charge rates of the test, such as 0.2C, 0.5C, 1C, 2C, etc., where "C" represents the rated capacity of the battery. At the same time, determine the test duration and rest time for each rate. Finally, the battery is subjected to a series of charge and discharge tests at different rates, and data such as voltage, current, temperature and capacity are recorded.
[0068] The preset strategy refers to performing corresponding rate tests according to the pulse charge and discharge performance test results of the battery cells to be tested, such as selecting a certain number of battery cells for which the HPPC test has been performed, and performing tests of different rates (0.125P, 0.25P, 0.375P, 0.5P) at different temperatures; or, for the battery cells to be tested that have not undergone the pulse charge and discharge test, skipping the rate test, that is, optionally, in some embodiments of the present application, the step of "performing rate tests on the battery cells to be tested according to the preset strategy and the pulse charge and discharge performance test results" may specifically include:
[0069] According to the pulse charge and discharge performance test result, determining that the battery cell to be tested that has been subjected to the pulse charge and discharge performance test is the first battery cell, and determining that the battery cell to be tested that has not been subjected to the pulse charge and discharge performance test is the second battery cell;
[0070] The first battery cell and part of the second battery cell are rate tested according to a preset strategy.
[0071] For example, specifically, according to the results of the pulse charge and discharge performance test, the battery cell that has completed the test is determined as the first battery cell. The battery cell that has not undergone the pulse charge and discharge performance test is determined as the second battery cell. According to the application requirements and performance goals of the battery cell, determine the discharge rate that needs to be tested, such as 0.125P, 0.25P, 0.375P and 0.5P. Determine at which temperatures to perform the rate test, such as 15°C, 20°C, 25°C, 35°C and 40°C. Ensure that the first battery cell is in an appropriate SOC state, usually 100% SOC. Perform a discharge test of the first battery cell at a predetermined rate at different temperatures, and record data such as voltage, current, temperature and capacity. According to the preset strategy, select a certain number of battery cells from the second battery cell for rate testing. Perform the same rate test on the selected second battery cell as the first battery cell.
[0072] Optionally, in some embodiments of the present application, the step of “performing a rate test on the first battery cell and part of the second battery cell according to a preset strategy” may specifically include:
[0073] Determine a plurality of preset test temperatures and a plurality of discharge rates of the tests corresponding to the preset strategy;
[0074] A preset number of second battery cells are selected from the second battery cells, and rate tests are performed on the first battery cells and the selected second battery cells based on a plurality of preset test temperatures and a plurality of test discharge rates.
[0075] Determine the discharge rates that need to be tested as 0.125P, 0.25P, 0.375P and 0.5P to evaluate the performance of the battery cell at different discharge rates. Then, randomly select 50% of the battery cells from the second battery cell. Next, ensure that all the battery cells to be tested (the first battery cell and the selected second battery cell) are in the same initial state, such as 100% SOC. Perform rate tests on the battery cells at each preset test temperature. For example, perform discharge tests of 0.125P, 0.25P, 0.375P and 0.5P on the battery cells at 15°C, and then repeat this process at 20°C, 25°C, 35°C and 40°C.
[0076] 104. Perform a long cycle test on each battery cell to be tested based on the rate test results.
[0077] Long cycle testing is a battery test used to evaluate the durability and performance degradation of batteries under long-term use. This test is critical to understanding the life and aging characteristics of batteries, especially in applications that require long-term operation, such as energy storage systems, electric vehicles, and portable electronic devices. Specifically, the battery is charged to the rated voltage to ensure that all batteries are in the same initial state. Then, the number of charge and discharge cycles for the test is determined, usually ranging from hundreds to thousands. Next, the battery is subjected to a series of complete charge and discharge cycles, each cycle including charging, discharging, and resting stages. In each cycle, the battery voltage, current, temperature, and capacity data are recorded. Then, the battery discharge curve is analyzed to calculate the actual discharge capacity and energy efficiency. Finally, based on the test results, the battery life and performance degradation are predicted.
[0078] Optionally, in some embodiments of the present application, the step of “performing a long cycle test on each battery cell to be tested based on the rate test condition” may specifically include:
[0079] Determine the test parameters for rate testing;
[0080] According to the test parameters and rate test results, a long cycle test is performed on each battery cell to be tested.
[0081] For example, determine the parameters of the long cycle test, such as the number of cycles, charge and discharge rate, and cut-off voltage. Specifically, charge all 100 cells to 80% SOC and place them in an environmental test chamber at 25°C. Perform 1000 charge and discharge cycles on each cell, and each cycle includes charging to a cut-off voltage of 3.65V at a rate of 0.5P, and then discharging to a cut-off voltage of 2.5V. In addition, for cells that have not undergone HPPC testing and rate testing, a 100DOD (Depth of Discharge) test is performed. DOD indicates the percentage of the amount of electricity discharged by the battery in a discharge cycle to its total capacity, that is, optionally, in some embodiments of the present application, the step of "performing a long cycle test on each cell to be tested according to the test parameters and rate test conditions" may specifically include:
[0082] According to the rate test result, the second battery cell which has not been subjected to the rate test is determined as the third battery cell;
[0083] The first battery cell, the second battery cell and the third battery cell are respectively subjected to long cycle tests according to the test parameters, and the third battery cell is subjected to a long cycle test with a preset discharge depth at different temperatures.
[0084] For example, determine the total number of cycles for the long cycle test, such as 1000 cycles. Select a suitable charge and discharge rate, such as 0.5C. Select different test temperatures, such as room temperature (20°C), high temperature (40°C), and low temperature (0°C or -10°C). For the third battery cell, determine that the depth of discharge is 100% DOD. According to the test parameters, perform a long cycle test on the first battery cell, and record the voltage, current, temperature, capacity and other data of each cycle; perform the same long cycle test as the first battery cell on the second battery cell. Perform a long cycle test with a preset discharge depth at different temperatures on the third battery cell.
[0085] In order to further understand the battery cell testing solution of this application, the actual process is used for illustration, as follows:
[0086] Step 1: Initial RPT (Repetitive Pulse Test)
[0087] The purpose is to detect the initial available energy and DC internal resistance (DCR) of the battery cell to ensure that there is no abnormality in the battery. Specifically, all batteries are subjected to RPT tests of 0.25P and 0.5P at an ambient temperature of 20°C. The capacity of the battery is measured after 2 hours and 4 hours to evaluate the continuous discharge capability of the battery. It should be noted that the RPT test at room temperature has little effect on the battery capacity, which helps to control variables and provide benchmark data for subsequent tests.
[0088] Step 2: HPPC Test
[0089] The purpose is to detect the internal resistance of the battery cell and evaluate the power characteristics of the battery. Specifically, the HPPC test is performed at different temperatures (15°C, 20°C, 25°C, 35°C, 40°C, etc.). Optionally, in some embodiments of the present application, two-thirds of the battery cells are maliciously selected for the HPPC test, and the remaining battery cells skip this step.
[0090] Step 3: Test at different magnifications
[0091] Perform rate tests of 0.125P, 0.25P, 0.375P, and 0.5P at different temperatures (15°C, 20°C, 25°C, 35°C, 40°C, etc.). For cells that skip the HPPC test, select half for rate testing and the other half for long cycle testing.
[0092] Step 4: Long cycle test
[0093] All cells are subjected to long cycle tests, testing different temperatures and DOD. Among them, for cells that have not been tested by HPPC and rate, long cycle tests with 100% DOD are performed. The cell cycle temperature is 15°C, 20°C, 25°C, 35°C, 40°C, etc. The cycle charge depth can be selected between 60%, 80% and 100%. Specifically, for the tested cells (including HPPC and / or rate tests), a 60% DOD test is performed: a long cycle test of 60% DOD is performed at 15°C, 20°C, and 25°C. Each cycle includes charging to 4.2V and then discharging to 20Ah (20% of 100Ah). And 80% DOD test: a long cycle test of 80% DOD is performed at 35°C and 40°C. Each cycle includes charging to 4.2V and then discharging to 80Ah (80% of 100Ah).
[0094] For the cells to be tested without HPPC and rate testing, a 100% DOD test is performed: a long cycle test of 100% DOD is performed at all temperatures (15°C, 20°C, 25°C, 35°C, 40°C). Each cycle includes charging to 4.2V and then discharging to 2.5V.
[0095] The embodiment of the present application provides a battery cell testing method, after pulse testing each battery cell to be tested in a battery cell set to be tested, a preset number of battery cells to be tested are selected from the battery cells to be tested after the pulse test, and a pulse charge and discharge performance test is performed on the selected battery cells to be tested, then, according to a preset strategy and the pulse charge and discharge performance test results, a rate test is performed on each battery cell to be tested, and finally, a long cycle test is performed on each battery cell to be tested based on the rate test results. The battery cell testing scheme provided by the present application is to select a preset number of battery cells to be tested from the battery cells to be tested after the pulse test to perform a pulse charge and discharge performance test, and according to a preset strategy and the pulse charge and discharge performance test results, perform a rate test and a long cycle test in sequence, thereby, when testing multiple different battery cells, the number of battery cells that need to be tested can be reduced, and the consumption of manpower and physical energy can be reduced, thereby improving the efficiency of battery cell testing.
[0096] In addition, the present application also provides an electronic device, such as Figure 2 As shown, it shows a schematic diagram of the structure of the electronic device involved in the embodiment of the present application, specifically:
[0097] The electronic device may include components such as a processor 201 with one or more processing cores, a memory 202 with one or more computer-readable storage media, a power supply 203, and an input unit 204. Those skilled in the art will appreciate that Figure 2 The electronic device structure shown in the figure does not constitute a limitation on the electronic device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.
[0098] The processor 201 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 202 and calling data stored in the memory 202, it executes various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. Optionally, the processor 201 may include one or more processing cores; preferably, the processor 201 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 201.
[0099] The memory 202 can be used to store software programs and modules. The processor 201 executes various functional applications and battery cell tests by running the software programs and modules stored in the memory 202. The memory 202 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 202 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 202 may also include a memory controller to provide the processor 201 with access to the memory 202.
[0100] The electronic device also includes a power supply 203 for supplying power to various components. Preferably, the power supply 203 can be logically connected to the processor 201 through a power management system, so as to manage charging, discharging, power consumption and other functions through the power management system. The power supply 203 can also include any components such as one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, and power status indicators.
[0101] The electronic device may further include an input unit 204, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls.
[0102] Although not shown, the electronic device may further include a display unit, etc., which will not be described in detail herein. Specifically in this embodiment, the processor 201 in the electronic device will load the executable files corresponding to the processes of one or more application programs into the memory 202 according to the following instructions, and the processor 201 will run the application programs stored in the memory 202, thereby realizing various functions, as follows:
[0103] Perform pulse test on each cell to be tested in the set of cells to be tested; select a preset number of cells to be tested from the cells to be tested after the pulse test, and perform pulse charge and discharge performance test on the selected cells to be tested; perform rate test on each cell to be tested according to the preset strategy and the pulse charge and discharge performance test results; perform long cycle test on each cell to be tested based on the rate test results.
[0104] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.
[0105] In the embodiment of the present application, after pulse testing each battery cell to be tested in the battery cell set to be tested, a preset number of battery cells to be tested are selected from the battery cells to be tested after the pulse test, and a pulse charge and discharge performance test is performed on the selected battery cells to be tested. Then, according to a preset strategy and the pulse charge and discharge performance test results, a rate test is performed on each battery cell to be tested. Finally, a long cycle test is performed on each battery cell to be tested based on the rate test results. The battery cell testing scheme provided in the present application is to select a preset number of battery cells to be tested from the battery cells to be tested after the pulse test to perform a pulse charge and discharge performance test, and according to a preset strategy and the pulse charge and discharge performance test results, a rate test and a long cycle test are performed in sequence. Thus, when testing multiple different battery cells, the number of battery cells that need to be tested can be reduced, and the consumption of manpower and physical energy can be reduced, thereby improving the efficiency of the battery cell testing.
[0106] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.
[0107] To this end, an embodiment of the present application provides a storage medium in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute the steps in any of the cell testing methods provided in the embodiments of the present application. For example, the instructions can execute the following steps:
[0108] Perform pulse test on each cell to be tested in the set of cells to be tested; select a preset number of cells to be tested from the cells to be tested after the pulse test, and perform pulse charge and discharge performance test on the selected cells to be tested; perform rate test on each cell to be tested according to the preset strategy and the pulse charge and discharge performance test results; perform long cycle test on each cell to be tested based on the rate test results.
[0109] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.
[0110] The storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.
[0111] Since the instructions stored in the storage medium can execute the steps in any battery cell testing method provided in the embodiments of the present application, the beneficial effects that can be achieved by any battery cell testing method provided in the embodiments of the present application can be achieved. Please refer to the previous embodiments for details and will not be repeated here.
[0112] The above is a detailed introduction to a battery cell testing method, an electronic device, and a storage medium provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A battery cell testing method, characterized in that: include: Performing pulse testing on each battery cell to be tested in the battery cell set to be tested; Selecting a preset number of cells to be tested from the cells to be tested after the pulse test, and performing a pulse charge and discharge performance test on the selected cells to be tested; According to the preset strategy and the pulse charge and discharge performance test results, the rate test is performed on each of the cells to be tested; A long cycle test is performed on each of the cells to be tested based on the rate test results.
2. The battery cell testing method according to claim 1, characterized in that: The pulse test of each battery cell to be tested in the battery cell set to be tested comprises: Charging each battery cell to be tested in the battery cell set to a rated voltage corresponding to the battery cell to be tested; According to a preset test environment, the discharge amount of the battery cell to be tested is tested at different discharge times until the battery cell to be tested has a cut-off voltage corresponding to the battery cell to be tested.
3. The battery cell testing method according to claim 1, characterized in that: The step of selecting a preset number of cells to be tested from the cells to be tested after the pulse test, and performing a pulse charge and discharge performance test on the selected cells to be tested comprises: Selecting a preset number of cells to be tested from the cells to be tested after the pulse test; The pulse charge and discharge performance test is performed on the selected battery cells under multiple test temperatures.
4. The battery cell testing method according to claim 3, characterized in that: The pulse charge and discharge performance test is performed on the selected battery cells to be tested at multiple test temperatures, including: Adjust the power state of the selected battery cell to be tested to a preset power state; At each test temperature, at least one charge-discharge cycle is performed on the battery cell to be tested that is adjusted to a preset state of charge.
5. The battery cell testing method according to claim 1, characterized in that: The method of performing a rate test on each of the cells to be tested according to the preset strategy and the pulse charge and discharge performance test results includes: According to the pulse charge and discharge performance test result, determining that the battery cell to be tested that has been subjected to the pulse charge and discharge performance test is the first battery cell, and determining that the battery cell to be tested that has not been subjected to the pulse charge and discharge performance test is the second battery cell; The first battery cell and part of the second battery cell are rate tested according to a preset strategy.
6. The battery cell testing method according to claim 5, characterized in that: The performing rate testing on the first battery cell and part of the second battery cell according to a preset strategy includes: Determine a plurality of preset test temperatures and a plurality of discharge rates of the tests corresponding to the preset strategy; A preset number of second battery cells are selected from the second battery cells, and rate tests are performed on the first battery cells and the selected second battery cells based on a plurality of preset test temperatures and a plurality of test discharge rates.
7. The battery cell testing method according to claim 1, characterized in that: The long cycle test is performed on each of the cells to be tested based on the rate test condition, including: Determine the test parameters for rate testing; According to the test parameters and rate test conditions, a long cycle test is performed on each of the cells to be tested.
8. The battery cell testing method according to claim 7, characterized in that: The step of performing a long cycle test on each of the cells to be tested according to the test parameters and the rate test condition includes: According to the rate test result, the second battery cell which has not been subjected to the rate test is determined as the third battery cell; performing a long cycle test on the first battery cell, the second battery cell and the third battery cell respectively according to the test parameters, and; A long cycle test with a preset discharge depth is performed on the third battery cell at different temperatures.
9. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the battery cell testing method according to any one of claims 1 to 8 are implemented.
10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, wherein when the computer program is executed by a processor, the steps of the battery cell testing method according to any one of claims 1 to 8 are implemented.