Battery capacity grading capacity compensation method and device, electronic equipment and storage medium

Abstract

The embodiment of the invention discloses a battery capacity grading capacity compensation method and device, electronic equipment and a storage medium. The method comprises the following steps: selecting a plurality of batteries to be processed after formation and before capacity grading; the selected to-be-processed batteries are divided into a preset set, a plurality of battery sets are obtained, and the number of the batteries in each battery set is the same; according to a preset temperature gradient and a production line capacity grading test method, testing a first capacity corresponding to each to-be-processed battery in the battery set; and testing the second capacity corresponding to each to-be-processed battery in the battery set based on a product specification, and performing capacity compensation on the to-be-processed batteries based on the first capacity and the second capacity, so that the accuracy of battery capacity grading can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery capacity division, and in particular to a method, device, electronic device and storage medium for compensating the capacity of a battery capacity division. Background Art

[0002] During the manufacturing process of lithium-ion batteries, the battery capacity is tested by capacity division at room temperature. However, since charging and discharging during the capacity division process will generate heat, and the density of the battery charging and discharging cabinet is high, the heat is not dissipated in time, resulting in the battery temperature rising. In actual production, the battery position is different, the charging and discharging process is different, and the temperature of almost every tray of batteries is different. The temperature will have a certain impact on the accuracy of battery capacity measurement, so the capacity data obtained by capacity division will be inaccurate. Summary of the invention

[0003] The embodiments of the present application provide a method, device, electronic device and storage medium for compensating the capacity of battery sub-capacity, which can improve the accuracy of battery sub-capacity.

[0004] The present application provides a method for compensating the capacity of a battery, including:

[0005] Select a plurality of batteries to be processed after formation and before capacity separation;

[0006] Dividing the selected multiple batteries to be processed into preset sets to obtain multiple battery sets, wherein the number of batteries in each battery set is the same;

[0007] Testing the first capacity of each battery to be processed in the battery set according to a preset temperature gradient and a production line capacity test method;

[0008] The second capacity corresponding to each battery to be processed in the battery set is tested based on product specifications, and the capacity of the battery to be processed is compensated based on the first capacity and the second capacity.

[0009] Optionally, in some embodiments of the present application, the step of testing the first capacity of each battery to be processed in the battery set according to the preset temperature gradient and the production line capacity test method includes:

[0010] Determine a plurality of test temperatures corresponding to a preset temperature gradient;

[0011] The first capacity corresponding to each battery to be processed in the battery set at each test temperature is tested according to a production line capacity test method.

[0012] Optionally, in some embodiments of the present application, the step of testing the first capacity of each battery to be processed in the battery set at each test temperature according to the production line capacity test method includes:

[0013] At each test temperature, charging each battery to be processed in the battery set to a rated voltage;

[0014] After each battery to be processed is charged to a rated voltage, each battery to be processed is discharged to a cut-off voltage, and a first capacity corresponding to each battery to be processed at each test temperature is calculated based on the current and voltage of the battery to be processed during the discharge process.

[0015] Optionally, in some embodiments of the present application, the step of testing the second capacity corresponding to each battery to be processed in the battery set based on the product specification, and performing capacity compensation on the battery to be processed based on the first capacity and the second capacity, includes:

[0016] Determining a standard temperature corresponding to the product specification;

[0017] Testing each to-be-processed battery in the battery set at the standard temperature to obtain a second capacity of each to-be-processed battery in the battery set at the standard temperature;

[0018] The difference between the first capacity and the second capacity is calculated, and the capacity of the battery to be processed is compensated based on the difference.

[0019] Optionally, in some embodiments of the present application, the capacity compensation of the battery to be processed based on the difference includes:

[0020] Calculate the average value of capacity compensation at each test temperature;

[0021] A polynomial is used to fit each temperature gradient and its corresponding capacity compensation value scatter points;

[0022] Capacity compensation is performed on the battery to be processed based on the fitting result.

[0023] Optionally, in some embodiments of the present application, the capacity compensation of the battery to be processed based on the fitting result includes:

[0024] Adjust the fitting coefficient of the polynomial fitting curve to be greater than a preset value;

[0025] According to a polynomial fitting curve whose fitting coefficient is greater than a preset value, a temperature compensation fitting equation of the battery to be processed is determined, and the capacity of the battery to be processed is compensated by using the temperature compensation fitting equation.

[0026] Optionally, in some embodiments of the present application, it further includes:

[0027] Detecting the health status of the battery to be processed;

[0028] If the health status of the battery to be processed does not meet the preset condition, the battery to be processed is removed from the battery set.

[0029] The present application also provides a battery capacity compensation device, comprising:

[0030] A selection module, used for selecting a plurality of batteries to be processed after formation and before capacity separation;

[0031] A division module, used for dividing the selected multiple batteries to be processed into preset sets to obtain multiple battery sets, wherein the number of batteries in each battery set is the same;

[0032] A testing module, used for testing the first capacity corresponding to each battery to be processed in the battery set according to a preset temperature gradient and a production line capacity test method;

[0033] The compensation module is used to test the second capacity corresponding to each battery to be processed in the battery set based on product specifications, and to perform capacity compensation on the battery to be processed based on the first capacity and the second capacity.

[0034] 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.

[0035] 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.

[0036] The embodiments of the present application provide a method, device, electronic device and storage medium for compensating the capacity of a battery capacity division. After selecting a plurality of batteries to be processed after formation and before capacity division, the selected plurality of batteries to be processed are divided into preset sets to obtain a plurality of battery sets, wherein the number of batteries in each battery set is the same. Then, according to a preset temperature gradient and a production line capacity division test method, the first capacity corresponding to each battery to be processed in the battery set is tested. Finally, based on the product specification, the second capacity corresponding to each battery to be processed in the battery set is tested, and the capacity of the battery to be processed is compensated based on the first capacity and the second capacity. The scheme for compensating the capacity of a battery capacity division provided by the present application is to first test the first capacity corresponding to the battery to be processed according to a preset temperature gradient and a production line capacity division test method, and then test the second capacity corresponding to the battery to be processed based on the product specification. Finally, the capacity of the battery to be processed is compensated based on the first capacity and the second capacity, which can avoid the influence of different temperatures on the accuracy of battery capacity measurement, thereby further improving the accuracy of battery capacity division. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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.

[0038] Figure 1 It is a flow chart of a method for compensating the battery capacity provided in an embodiment of the present application;

[0039] Figure 2 It is a schematic diagram of the structure of a compensation device for battery capacity division provided in an embodiment of the present application;

[0040] Figure 3 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] 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.

[0042] Embodiments of the present application provide a method, device, electronic device and storage medium for compensating the capacity of a divided battery.

[0043] Among them, the battery capacity compensation 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 operated server or a distributed server, and can also include a server cluster composed of multiple servers.

[0044] It should be noted that the order of description of the following embodiments is not intended to limit the priority order of the embodiments.

[0045] A method for compensating the capacity of a battery, comprising: selecting a plurality of batteries to be processed after formation and before capacity division; dividing the selected plurality of batteries to be processed into preset sets to obtain a plurality of battery sets; testing a first capacity corresponding to each battery to be processed in the battery set according to a preset temperature gradient and a production line capacity division test method; testing a second capacity corresponding to each battery to be processed in the battery set based on product specifications, and performing capacity compensation on the batteries to be processed based on the first capacity and the second capacity.

[0046] See also Figure 1 , Figure 1 A schematic diagram of a flow chart of a method for compensating the battery capacity provided in an embodiment of the present application. The specific flow chart of the method for compensating the battery capacity can be as follows:

[0047] 101. Select a plurality of batteries to be processed after formation and before capacity separation.

[0048] Formation is a critical step in the battery manufacturing process, especially in the production of lithium-ion batteries. This process involves charging and discharging a new battery for the first time to develop the chemical stability and electrical properties within the battery. The formation process helps activate the electrochemical properties of the battery, ensuring that the battery can achieve the expected performance in subsequent use.

[0049] Before capacity separation, a certain number of batteries need to be selected from the formed batteries for testing. The purpose of this step is to evaluate the actual capacity and performance of the batteries so that they can be classified into different capacity levels. Unprocessed batteries refer to those batteries that have completed the formation process but have not yet been tested for capacity separation. These batteries need to undergo a series of tests to determine their actual capacity and performance.

[0050] For example, determining the number of batteries to be selected and adopting a random sampling method to select the batteries can be achieved by using a random number generator or a random sampling table. For example, the batteries to be processed can be randomly selected from different batches to ensure that the samples cover different production conditions.

[0051] 102. Divide the selected multiple batteries to be processed into preset sets to obtain multiple battery sets.

[0052] For example, determine the number of batteries and the number of sets, then divide the selected batteries into groups of 5 and assign these battery sets to different temperature gradients for testing. Each set will be tested at a specific temperature to simulate different working environments.

[0053] Specifically, 20 batteries can be randomly selected from the batteries after formation and before capacity division. Divide these 20 batteries into 4 sets, each set contains 5 batteries, and mark these sets as set A, set B, set C and set D. Assign these battery sets to different temperature gradients for testing. Assume that the temperature gradients are: 10℃, 20℃, 30℃ and 40℃ respectively. Set A is tested at 10℃, set B is tested at 20℃, set C is tested at 30℃, and set D is tested at 40℃.

[0054] 103. Test the first capacity corresponding to each battery to be processed in the battery set according to a preset temperature gradient and a production line capacity testing method.

[0055] Production line capacity testing is an important part of the battery manufacturing process, especially in the production of lithium-ion batteries. This process involves subjecting the battery to a series of tests to determine its capacity and performance, and classifying the battery according to these parameters (capacity classification).

[0056] First, according to the multiple test temperatures corresponding to the preset gradient temperature, the batteries in each battery set are charged, usually to the rated voltage or. The battery is discharged under controlled conditions, the current and voltage during the discharge process are recorded, and the discharge capacity of the battery is calculated. The discharge is usually discharged to a specific cut-off voltage. Finally, at each temperature gradient, the discharge capacity (i.e., the first capacity) of each battery is recorded. That is, optionally, in some embodiments of the present application, the step of "testing the first capacity corresponding to each battery to be processed in the battery set according to the preset temperature gradient and the production line capacity test method" may specifically include:

[0057] Determine a plurality of test temperatures corresponding to a preset temperature gradient;

[0058] The first capacity corresponding to each battery to be processed in the battery set at each test temperature is tested according to the production line capacity test method.

[0059] For example, specifically, a series of preset temperature points are determined according to the working conditions and test requirements of the battery. These temperature points may include but are not limited to room temperature (such as 25°C), high temperature (such as 40°C) and low temperature (such as 0°C), etc., to cover the ambient temperature range that the battery may encounter. A certain number of batteries to be processed are randomly selected from the formed batteries to ensure the representativeness of the sample. The selected batteries are divided into multiple battery sets in the form of 5 batteries per group (or other preset number), and each set will be tested at a specific temperature. At each temperature gradient, the batteries in each battery set are charged, usually to the rated voltage or the specified charging cutoff condition. The battery is discharged under controlled conditions, the current and voltage during the discharge process are recorded, and the discharge capacity of the battery is calculated. The discharge is usually discharged to a specific cutoff voltage. At each temperature gradient, the discharge capacity (i.e., the first capacity) of each battery is recorded.

[0060] Optionally, in some embodiments of the present application, the step of “testing the first capacity of each battery to be processed in the battery set at each test temperature according to the production line capacity test method” may specifically include:

[0061] At each test temperature, each battery to be processed in the battery set is charged to a rated voltage;

[0062] After each battery to be processed is charged to a rated voltage, each battery to be processed is discharged to a cut-off voltage, and a first capacity corresponding to each battery to be processed at each test temperature is calculated based on the current and voltage of the battery to be processed during the discharge process.

[0063] 104. Test the second capacity corresponding to each battery to be processed in the battery set based on the product specification, and perform capacity compensation on the battery to be processed based on the first capacity and the second capacity.

[0064] The standard temperature for testing can be determined based on the product specification. For example, the test standard specifies 25°C as the standard test temperature. The batteries in each battery set are discharged at the standard temperature to obtain the second capacity. This is usually performed under controlled conditions to ensure the consistency and accuracy of the test. The discharge capacity (i.e., the second capacity) of each battery at the standard temperature is recorded. For each battery, the difference between the first capacity (Q1) and the second capacity (Q2) is calculated. This difference represents the performance change of the battery at different temperatures. Based on the difference of Q2-Q1, the capacity compensation value of each battery is determined. This compensation value will be used to adjust the actual capacity of the battery to reflect its performance under standard test conditions. Optionally, in some embodiments of the present application, the calculated compensation value can be applied to the first capacity of each battery to obtain the compensated capacity. This can be done by simple addition or a more complex mathematical model, depending on the compensation strategy.

[0065] Optionally, in some embodiments of the present application, the step of “testing the second capacity corresponding to each battery to be processed in the battery set based on the product specification, and performing capacity compensation on the battery to be processed based on the first capacity and the second capacity” may specifically include:

[0066] Determine the standard temperature corresponding to the product specification;

[0067] Testing each battery to be processed in the battery set at a standard temperature to obtain a second capacity of each battery to be processed in the battery set at the standard temperature;

[0068] The difference between the first capacity and the second capacity is calculated, and the capacity of the battery to be processed is compensated based on the difference.

[0069] For example, according to the technical specifications of the battery product or international / national standards (such as IEC 61960, GB / T31484, etc.), determine the standard temperature for testing. This temperature is usually the temperature at which the battery performance is most stable and best represents the actual use conditions. Adjust the test environment (such as a constant temperature box or a constant temperature charging and discharging device) to the standard temperature, and ensure that the temperature remains constant throughout the test. Place each battery to be processed in the battery collection in an environment at a standard temperature. Perform a discharge test on each battery, usually at a discharge rate of 1C (1 times the rated capacity of the battery) to a preset cut-off voltage. Record the capacity (i.e., the second capacity) of each battery when discharged to the cut-off voltage at the standard temperature. Collect the first capacity data of each battery tested at different temperature gradients. For each battery, calculate the difference (ΔQ=Q2-Q1) between its first capacity (Q1) tested at a non-standard temperature and its second capacity (Q2) tested at a standard temperature. Determine a suitable compensation strategy, such as a linear or nonlinear compensation model, based on the working principle and historical data of the battery. Apply the calculated difference to the first capacity of each battery to adjust its capacity to the performance at the standard temperature.

[0070] Optionally, in some embodiments of the present application, the step of “capacity compensation for the battery to be processed based on the difference” may specifically include:

[0071] Calculate the average value of capacity compensation at each test temperature;

[0072] A polynomial is used to fit each temperature gradient and its corresponding capacity compensation value scatter points;

[0073] The capacity of the treated battery is compensated based on the fitting results.

[0074] For all batteries at each test temperature, collect data on their first capacity (Q1) and second capacity (Q2). For each battery, calculate the difference between the first capacity and the second capacity, i.e., the compensation value (ΔQ=Q2-Q1). For each test temperature, calculate the average of the compensation values ​​of all batteries. This average value will be used for subsequent polynomial fitting. According to the characteristics and complexity of the data, select a suitable polynomial order (linear, quadratic, cubic, etc.). For example, the least squares method or other fitting algorithms can be used to perform polynomial fitting for each temperature gradient and the corresponding capacity compensation value. Check the coefficient of determination (R2) of the fitting curve to ensure that the fit is good. Generally, the closer the R2 value is to 1, the better the fit. Use the obtained polynomial fitting equation to predict the capacity compensation value at different temperatures. For each battery to be processed, adjust its actual capacity according to its test temperature and the theoretical compensation value calculated by the fitting equation to compensate for the effect of temperature on battery performance.

[0075] Optionally, in some embodiments of the present application, the step of “capacity compensation for the battery to be processed based on the fitting result” may specifically include:

[0076] Adjust the fitting coefficient of the polynomial fitting curve to be greater than a preset value;

[0077] According to a polynomial fitting curve whose fitting coefficient is greater than a preset value, a temperature compensation fitting equation of the battery to be processed is determined, and the capacity of the battery to be processed is compensated by using the temperature compensation fitting equation.

[0078] For example, the preset value can be 0.95, that is, according to the polynomial fitting curve with a fitting coefficient greater than 0.95, the temperature compensation fitting equation of the battery to be processed is determined, and the temperature compensation fitting equation is used to compensate the capacity of the battery to be processed. Specifically, for each battery to be processed, the temperature compensation fitting equation is used to calculate its expected capacity compensation value at the test temperature. The calculated compensation value is applied to the actual test capacity of each battery to obtain the compensated capacity. For example, if the actual capacity of the battery at a non-standard temperature is Q1 and the capacity at a standard temperature is Q2, the compensation value ΔQ can be calculated by the fitting equation, and the compensated capacity Q1'=Q1+ΔQ.

[0079] Optionally, in some embodiments of the present application, the following may be specifically included:

[0080] Detect the health status of the battery to be processed;

[0081] If the health status of the battery to be processed does not meet the preset condition, the battery to be processed is removed from the battery set.

[0082] Define the evaluation criteria for battery health status based on the battery performance requirements and safety standards. These criteria may include battery capacity, internal resistance, voltage range, number of charge and discharge cycles, etc. Analyze the test data to determine whether the health status of each battery meets the preset conditions. Based on the test results, the battery is classified as healthy, sub-healthy, or unhealthy. Batteries that do not meet the preset health status conditions are marked and removed from the battery collection to ensure the overall quality and performance of the battery collection.

[0083] The embodiment of the present application provides a method for compensating the capacity of a battery capacity division. After selecting a plurality of batteries to be processed after formation and before capacity division, the selected plurality of batteries to be processed are divided into preset sets to obtain a plurality of battery sets, wherein the number of batteries in each battery set is the same. Then, according to a preset temperature gradient and a production line capacity division test method, the first capacity corresponding to each battery to be processed in the battery set is tested. Finally, based on the product specification, the second capacity corresponding to each battery to be processed in the battery set is tested, and the capacity of the battery to be processed is compensated based on the first capacity and the second capacity. The scheme for compensating the capacity of a battery capacity division provided by the present application is to first test the first capacity corresponding to the battery to be processed according to a preset temperature gradient and a production line capacity division test method, and then test the second capacity corresponding to the battery to be processed based on the product specification. Finally, the capacity of the battery to be processed is compensated based on the first capacity and the second capacity, which can avoid the influence of different temperatures on the accuracy of battery capacity measurement, thereby further improving the accuracy of battery capacity division.

[0084] In order to facilitate better implementation of the battery capacity compensation method of the embodiment of the present application, the embodiment of the present application also provides a compensation device based on the above-mentioned battery capacity compensation (hereinafter referred to as the compensation device). The meaning of the terms is the same as in the above-mentioned battery capacity compensation method, and the specific implementation details can refer to the description in the method embodiment.

[0085] See also Figure 2 , Figure 2 A schematic diagram of the structure of a compensation device for battery capacity division provided in an embodiment of the present application, wherein the processing device may include a selection module 201, a division module 202, a test module 203 and a compensation module 204, which may be specifically as follows:

[0086] Selection module 201, for selecting a plurality of batteries to be processed before formation and capacity division.

[0087] The division module 202 is used to divide the selected multiple batteries to be processed into preset sets to obtain multiple battery sets.

[0088] Wherein, the number of batteries in each battery set is the same;

[0089] The testing module 203 is used to test the first capacity corresponding to each battery to be processed in the battery set according to a preset temperature gradient and a production line capacity testing method.

[0090] Optionally, in some embodiments of the present application, the testing module 203 may specifically include:

[0091] A first determining unit, used to determine a plurality of test temperatures corresponding to a preset temperature gradient;

[0092] The first testing unit is used to test the first capacity of each battery to be processed in the battery set at each testing temperature according to a production line capacity testing method.

[0093] Optionally, in some embodiments of the present application, the testing unit is specifically used to: at each test temperature, charge each battery to be processed in the battery collection to a rated voltage; after each battery to be processed is charged to the rated voltage, discharge each battery to be processed to a cut-off voltage, and calculate the first capacity corresponding to each battery to be processed at each test temperature based on the current and voltage of the battery to be processed during the discharge process.

[0094] The compensation module 204 is used to test the second capacity corresponding to each battery to be processed in the battery set based on the product specification, and perform capacity compensation on the battery to be processed based on the first capacity and the second capacity.

[0095] Optionally, in some embodiments of the present application, the compensation module 204 may specifically include:

[0096] A second determining unit, used to determine a standard temperature corresponding to the product specification;

[0097] A second testing unit is used to test each battery to be processed in the battery set at a standard temperature to obtain a second capacity of each battery to be processed in the battery set at the standard temperature;

[0098] The compensation unit is used to calculate the difference between the first capacity and the second capacity, and perform capacity compensation on the battery to be processed based on the difference.

[0099] Optionally, in some embodiments of the present application, the compensation unit may specifically include:

[0100] A calculation subunit, used for calculating an average value of capacity compensation at each test temperature;

[0101] A fitting subunit, used for fitting each temperature gradient and its corresponding capacity compensation value scatter points using a polynomial;

[0102] The compensation subunit is used to perform capacity compensation on the battery to be processed based on the fitting result.

[0103] Optionally, in some embodiments of the present application, the compensation subunit can be specifically used to: adjust the fitting coefficient of the polynomial fitting curve to be greater than a preset value; determine the temperature compensation fitting equation of the battery to be processed based on the polynomial fitting curve whose fitting coefficient is greater than the preset value, and use the temperature compensation fitting equation to perform capacity compensation on the battery to be processed.

[0104] Optionally, in some embodiments of the present application, the second test unit may be specifically used to: detect the health status of the battery to be processed; if the health status of the battery to be processed does not meet a preset condition, remove the battery to be processed from the battery set.

[0105] The embodiment of the present application provides a compensation device for battery capacity division. After the selection module 201 selects multiple batteries to be processed after formation and before capacity division, the division module 202 divides the selected multiple batteries to be processed into preset sets to obtain multiple battery sets, wherein the number of batteries in each battery set is the same. Then, the testing module 203 tests the first capacity corresponding to each battery to be processed in the battery set according to the preset temperature gradient and the production line capacity division test method. Finally, the compensation module 204 tests the second capacity corresponding to each battery to be processed in the battery set based on the product specification, and performs capacity compensation on the battery to be processed based on the first capacity and the second capacity. The compensation scheme for battery capacity division provided by the present application is to first test the first capacity corresponding to the battery to be processed according to the preset temperature gradient and the production line capacity division test method, and then test the second capacity corresponding to the battery to be processed based on the product specification. Finally, the capacity compensation is performed on the battery to be processed based on the first capacity and the second capacity, which can avoid the accuracy of battery capacity measurement affected by different temperatures, thereby further improving the accuracy of battery capacity division.

[0106] In addition, the present application also provides an electronic device, such as Figure 3 As shown, it shows a schematic diagram of the structure of the electronic device involved in the embodiment of the present application, specifically:

[0107] The electronic device may include components such as a processor 301 with one or more processing cores, a memory 302 with one or more computer-readable storage media, a power supply 303, and an input unit 304. Those skilled in the art will appreciate that Figure 3 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.

[0108] The processor 301 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 302, and calling data stored in the memory 302, it executes various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. Optionally, the processor 301 may include one or more processing cores; preferably, the processor 301 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 301.

[0109] The memory 302 can be used to store software programs and modules. The processor 301 executes various functional applications and compensation of battery capacity by running the software programs and modules stored in the memory 302. The memory 302 can mainly include a program storage area and a data storage area, wherein the program storage area can 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 can store data created according to the use of the electronic device, etc. In addition, the memory 302 can include a high-speed random access memory, and can 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 302 can also include a memory controller to provide the processor 301 with access to the memory 302.

[0110] The electronic device also includes a power supply 303 for supplying power to each component. Preferably, the power supply 303 can be logically connected to the processor 301 through a power management system, so that the power management system can manage charging, discharging, power consumption and other functions. The power supply 303 can also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators and other arbitrary components.

[0111] The electronic device may further include an input unit 304, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0112] 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 301 in the electronic device will load the executable files corresponding to the processes of one or more application programs into the memory 302 according to the following instructions, and the processor 301 will run the application programs stored in the memory 302, thereby realizing various functions, as follows:

[0113] Select multiple batteries to be processed after formation and before capacity division; divide the selected multiple batteries to be processed into preset sets to obtain multiple battery sets; test the first capacity corresponding to each battery to be processed in the battery set according to a preset temperature gradient and a production line capacity division test method; test the second capacity corresponding to each battery to be processed in the battery set based on product specifications, and perform capacity compensation on the batteries to be processed based on the first capacity and the second capacity.

[0114] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0115] After selecting multiple batteries to be processed after formation and before capacity division, the embodiment of the present application divides the selected multiple batteries to be processed into preset sets to obtain multiple battery sets, wherein the number of batteries in each battery set is the same, and then, according to the preset temperature gradient and the production line capacity division test method, the first capacity corresponding to each battery to be processed in the battery set is tested, and finally, the second capacity corresponding to each battery to be processed in the battery set is tested based on the product specification, and the capacity of the battery to be processed is compensated based on the first capacity and the second capacity. The scheme for compensating the battery capacity division capacity provided by the present application is to first test the first capacity corresponding to the battery to be processed according to the preset temperature gradient and the production line capacity division test method, and then test the second capacity corresponding to the battery to be processed based on the product specification, and finally, the capacity of the battery to be processed is compensated based on the first capacity and the second capacity, which can avoid the influence of temperature differences on the accuracy of battery capacity measurement, thereby further improving the accuracy of battery capacity division.

[0116] 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.

[0117] 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 battery capacity compensation methods provided in the embodiments of the present application. For example, the instructions can execute the following steps:

[0118] Select multiple batteries to be processed after formation and before capacity division; divide the selected multiple batteries to be processed into preset sets to obtain multiple battery sets; test the first capacity corresponding to each battery to be processed in the battery set according to a preset temperature gradient and a production line capacity division test method; test the second capacity corresponding to each battery to be processed in the battery set based on product specifications, and perform capacity compensation on the batteries to be processed based on the first capacity and the second capacity.

[0119] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0120] The storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0121] Since the instructions stored in the storage medium can execute the steps in any of the battery capacity compensation methods provided in the embodiments of the present application, the beneficial effects that can be achieved by any of the battery capacity compensation methods provided in the embodiments of the present application can be achieved. For details, please refer to the previous embodiments and will not be repeated here.

[0122] The above is a detailed introduction to a battery capacity compensation method, device, electronic device and storage medium provided in the embodiments of the present application. Specific examples are used in this article 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 method for compensating the capacity of a battery, characterized in that: include: Select a plurality of batteries to be processed after formation and before capacity separation; Dividing the selected multiple batteries to be processed into preset sets to obtain multiple battery sets, wherein the number of batteries in each battery set is the same; Testing the first capacity of each battery to be processed in the battery set according to a preset temperature gradient and a production line capacity test method; The second capacity corresponding to each battery to be processed in the battery set is tested based on product specifications, and the capacity of the battery to be processed is compensated based on the first capacity and the second capacity.

2. The compensation method according to claim 1, characterized in that: The step of testing the first capacity of each battery to be processed in the battery set according to the preset temperature gradient and the production line capacity test method includes: Determine a plurality of test temperatures corresponding to a preset temperature gradient; The first capacity corresponding to each battery to be processed in the battery set at each test temperature is tested according to a production line capacity test method.

3. The compensation method according to claim 2, characterized in that: The step of testing the first capacity of each battery to be processed in the battery set at each test temperature according to the production line capacity test method includes: At each test temperature, charging each battery to be processed in the battery set to a rated voltage; After each battery to be processed is charged to a rated voltage, each battery to be processed is discharged to a cut-off voltage, and a first capacity corresponding to each battery to be processed at each test temperature is calculated based on the current and voltage of the battery to be processed during the discharge process.

4. The compensation method according to claim 1, characterized in that: The step of testing the second capacity corresponding to each battery to be processed in the battery set based on the product specification, and performing capacity compensation on the battery to be processed based on the first capacity and the second capacity, includes: Determining a standard temperature corresponding to the product specification; Testing each to-be-processed battery in the battery set at the standard temperature to obtain a second capacity of each to-be-processed battery in the battery set at the standard temperature; The difference between the first capacity and the second capacity is calculated, and the capacity of the battery to be processed is compensated based on the difference.

5. The compensation method according to claim 4, characterized in that: The method of performing capacity compensation on the battery to be processed based on the difference includes: Calculate the average value of capacity compensation at each test temperature; A polynomial is used to fit each temperature gradient and its corresponding capacity compensation value scatter points; Capacity compensation is performed on the battery to be processed based on the fitting result.

6. The compensation method according to claim 5, characterized in that: The method of performing capacity compensation on the battery to be processed based on the fitting result includes: Adjust the fitting coefficient of the polynomial fitting curve to be greater than a preset value; According to a polynomial fitting curve whose fitting coefficient is greater than a preset value, a temperature compensation fitting equation of the battery to be processed is determined, and the capacity of the battery to be processed is compensated by using the temperature compensation fitting equation.

7. The compensation method according to any one of claims 1 to 6, characterized in that: Also includes: Detecting the health status of the battery to be processed; If the health status of the battery to be processed does not meet the preset condition, the battery to be processed is removed from the battery set.

8. A battery capacity compensation device, characterized in that: include: A selection module, used for selecting a plurality of batteries to be processed after formation and before capacity separation; A division module, used for dividing the selected multiple batteries to be processed into preset sets to obtain multiple battery sets, wherein the number of batteries in each battery set is the same; A testing module, used for testing the first capacity corresponding to each battery to be processed in the battery set according to a preset temperature gradient and a production line capacity test method; The compensation module is used to test the second capacity corresponding to each battery to be processed in the battery set based on product specifications, and to perform capacity compensation on the battery to be processed based on the first capacity and the second capacity.

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 method for compensating the divided battery capacity as described in any one of claims 1 to 7 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 method for compensating the divided capacity of a battery as claimed in any one of claims 1 to 7 are implemented.

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