Battery test method and device based on twin batteries, electronic equipment and storage medium

Abstract

The embodiment of the invention discloses a battery test method and device based on twin batteries, electronic equipment and a storage medium. The method comprises the following steps: acquiring cell parameters of a target battery; according to the cell parameters, determining temperature information and deformation information of the target battery in the charging and discharging process; generating a digital model corresponding to the target battery based on the temperature information and the deformation information; the digital model is simulated, and a twin battery corresponding to the target battery is constructed based on a simulation result, so that the performance of the target battery is tested according to the twin battery, and according to the scheme, the test cost of the battery, the battery module and the battery pack can be reduced; the test time of the battery, the battery module and the battery pack is reduced, and the development cycle of the battery module and the battery pack is shortened.

Description

Technical Field

[0001] The present application relates to the field of digital design and manufacturing of batteries, and specifically to a battery testing method, device, electronic device and storage medium based on twin batteries. Background Art

[0002] In the current lithium battery system research and product development, especially in the research of thermal management and mechanical design, physical cells are used for experimental research. However, the procurement cycle of physical cells is long; the sensors need to be rearranged each time, which is a cumbersome process; the cost of finished cells is high; the reusability is low, and after use, they need to be scrapped, which further increases the cost of recycling; the equipment wiring is complex and requires repeated wiring; the procurement cycle is long, which affects the project progress. It can be seen that the current battery testing scheme has technical problems such as high cost and long testing cycle. Summary of the invention

[0003] The embodiments of the present application provide a battery testing method, device, electronic device and storage medium based on twin batteries, which can reduce the testing cost of batteries, battery modules and battery packs, reduce the testing time of batteries, battery modules and battery packs, and shorten the development cycle of battery modules and battery packs.

[0004] In a first aspect, an embodiment of the present application provides a battery testing method based on twin batteries, comprising:

[0005] Get the cell parameters of the target battery;

[0006] Determining temperature information and deformation information of the target battery during the charging and discharging process according to the battery cell parameters;

[0007] Based on the temperature information and the deformation information, generating a digital model corresponding to the target battery;

[0008] The digital model is simulated, and a twin battery corresponding to the target battery is constructed based on the simulation result, so as to test the performance of the target battery according to the twin battery.

[0009] Optionally, in some embodiments of the present application, generating a digital model corresponding to the target battery based on the temperature information and the deformation information includes:

[0010] extracting the temperature distribution of the target battery during the charging and discharging process from the temperature information, and;

[0011] Extracting deformation conditions of the target battery during the charging and discharging process from the deformation information;

[0012] Acquire a basic digital model corresponding to the target battery, wherein the shape of the basic digital model is the same as the shape of the target battery;

[0013] The basic digital model is configured according to the temperature distribution and deformation conditions to obtain a digital model corresponding to the target battery.

[0014] Optionally, in some embodiments of the present application, configuring the basic digital model according to the temperature distribution and deformation to obtain the digital model corresponding to the target battery includes:

[0015] According to the temperature distribution, a heating device and a temperature sensor are added at the preset position of the basic digital model; according to the deformation, a driving device and a pressure sensor are added at the preset position of the basic digital model, and the configured basic digital model is determined as the digital model corresponding to the target battery.

[0016] Optionally, in some embodiments of the present application, adding a heating device and a temperature sensor at a preset position of the basic digital model according to the temperature distribution includes:

[0017] Dividing the target battery into regions according to the temperature distribution;

[0018] According to the area division result, a heating device and a temperature sensor are added at a preset position of the basic digital model.

[0019] Optionally, in some embodiments of the present application, the driving device consists of a driver and an auxiliary tooling corresponding to the driver.

[0020] Optionally, in some embodiments of the present application, the driving device is composed of a plurality of driver arrays.

[0021] Optionally, in some embodiments of the present application, simulating the digital model and constructing a twin battery corresponding to the target battery based on the simulation result to test the performance of the target battery according to the twin battery includes:

[0022] Simulating the digital model and detecting whether the simulation result matches the battery cell parameters;

[0023] When the simulation result matches the battery cell parameters, a sample battery corresponding to the digital model is constructed;

[0024] Debugging the sample battery and detecting whether the debugging result matches the battery cell parameters;

[0025] When the debugging result matches the battery cell parameter, the sample battery is determined to be a twin battery corresponding to the target battery, so as to test the performance of the target battery based on the twin battery.

[0026] Optionally, in some embodiments of the present application, when the simulation result matches the cell parameter, constructing a sample battery corresponding to the digital model includes:

[0027] When the simulation result matches the battery cell parameter, a battery component corresponding to the digital model is obtained;

[0028] Obtaining preset circuit configuration information;

[0029] Based on the circuit configuration information and battery components, a sample battery corresponding to the digital model is constructed.

[0030] Optionally, in some embodiments of the present application, it further includes:

[0031] When the simulation result does not match the battery cell parameter, returning to the step of generating a digital model corresponding to the target battery based on the temperature information and the deformation information;

[0032] When the debugging result does not match the battery cell parameter, the process returns to the step of generating a digital model corresponding to the target battery based on the temperature information and the deformation information.

[0033] In a second aspect, the present application also provides a battery testing device based on twin batteries, comprising:

[0034] An acquisition module is used to obtain the cell parameters of the target battery;

[0035] A determination module, used to determine the temperature information and deformation information of the target battery during the charging and discharging process according to the battery cell parameters;

[0036] A generating module, used for generating a digital model corresponding to the target battery based on the temperature information and the deformation information;

[0037] A testing module is used to simulate the digital model and construct a twin battery corresponding to the target battery based on the simulation results, so as to test the performance of the target battery according to the twin battery.

[0038] 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.

[0039] 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.

[0040] The embodiment of the present application provides a battery testing method, device, electronic device and storage medium based on twin batteries. After obtaining the battery cell parameters of the target battery, the temperature information and deformation information of the target battery during the charging and discharging process are determined according to the battery cell parameters. Then, based on the temperature information and deformation information, a digital model corresponding to the target battery is generated. Finally, the digital model is simulated, and a twin battery corresponding to the target battery is constructed based on the simulation results to test the performance of the target battery according to the twin battery. The battery testing scheme based on twin batteries provided by the present application, when testing, determines the temperature information and deformation information of the target battery during the charging and discharging process according to the battery cell parameters of the target battery. Then, based on the temperature information and deformation information, a twin battery corresponding to the target battery is constructed. Thus, there is no need to consume a large number of physical batteries, reducing the testing cost of batteries, battery modules and battery packs. Moreover, when testing, there is no need for a large amount of repeated wiring, reducing the testing time of batteries, battery modules and battery packs and shortening the development cycle of battery modules and battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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.

[0042] Figure 1 It is a schematic diagram of a process of a battery testing method based on twin batteries provided in an embodiment of the present application;

[0043] Figure 2 It is a schematic diagram of the structure based on twin batteries provided in an embodiment of the present application;

[0044] Figure 3 This is a scene interface diagram of a battery testing method based on twin batteries provided in an embodiment of the present application;

[0045] Figure 4 is a schematic structural diagram of a battery testing device based on twin batteries provided in an embodiment of the present application;

[0046] Figure 5 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] 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.

[0048] Embodiments of the present application provide a battery testing method, device, electronic device and storage medium based on twin batteries.

[0049] Among them, the battery testing device based on twin batteries 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, or it can include a server cluster composed of multiple servers.

[0050] It should be noted that the order of description of the following embodiments is not intended to limit the priority order of the embodiments.

[0051] A battery testing method based on twin batteries, comprising: obtaining the cell parameters of a target battery; determining the temperature information and deformation information of the target battery during the charging and discharging process according to the cell parameters; generating a digital model corresponding to the target battery based on the temperature information and deformation information; simulating the digital model, and constructing a twin battery corresponding to the target battery based on the simulation results, so as to test the performance of the target battery according to the twin battery.

[0052] See also Figure 1 , Figure 1 A schematic diagram of a battery testing method based on twin batteries provided in an embodiment of the present application. The specific process of the battery testing method based on twin batteries can be as follows:

[0053] 101. Obtain the cell parameters of the target battery.

[0054] Cell parameters refer to a series of key data and indicators that describe the characteristics and performance of a single cell (battery unit). Cell parameters can specifically include charge retention, energy retention, SOC-OCV (State of Charge-Open Circuit Voltage), cell stiffness, and expansion analysis. Among them, charge retention refers to the amount of charge retained by the cell within a certain period of time (such as 30 days or 7 days) at a specific temperature (such as 25°C or 60°C) and state of charge (SOC); energy retention describes the capacity retention rate and energy retention rate of the cell at different temperatures (such as -20°C to 55°C); SOC-OCV describes the open circuit voltage of the cell at different temperatures and SOC; cell stiffness includes compression stiffness and expansion stiffness. Compression stiffness refers to the elastic deformation ability of the cell when it is static without charging or discharging, while expansion stiffness refers to the ability of the cell to resist elastic deformation during charging and discharging; expansion analysis uses an in-situ expansion analysis system (such as SWE2110) to quantify the difference in compression stiffness and expansion stiffness of the same cell. Specifically, the cell parameters of the target battery can be obtained through the cell specification sheet, which usually contains key information such as the nominal capacity, nominal voltage, internal resistance, charge and discharge cut-off voltage, size, weight, etc. of the cell. The cell parameters can also be obtained through online resources and databases, such as professional battery technology websites, academic papers and review articles. The specific acquisition method can be selected according to the actual situation and will not be elaborated here.

[0055] 102. Determine the temperature information and deformation information of the target battery during the charging and discharging process according to the battery cell parameters.

[0056] For example, the cell parameters carry temperature information and deformation information. The temperature information indicates the temperature range of the target battery for charging and discharging, such as the discharge temperature range of the cell is -30 to 60°C, and the charging temperature range is 0 to 60°C; the deformation information indicates how the battery deforms during the charging and discharging process. For example, during the charging and discharging process of a wound soft-pack lithium-ion battery, the change in the lattice structure of the negative active material graphite will cause the battery to deform. The diaphragm substrate is made of polyethylene (PE), which will shrink during the winding process, which will also cause the battery to deform.

[0057] 103. Generate a digital model corresponding to the target battery based on the temperature information and the deformation information.

[0058] For example, specifically, an equivalent circuit model (ECM) is used to describe the electrical characteristics of the battery cell, a thermal model is used to describe the thermal characteristics of the battery cell, and a mechanical model is used to describe the physical deformation of the battery cell. Then, the equivalent circuit model is coupled with the thermal model and the mechanical model to generate a digital model corresponding to the target battery.

[0059] Optionally, in some embodiments of the present application, the step of “generating a digital model corresponding to the target battery based on the temperature information and the deformation information” may specifically include:

[0060] extracting the temperature distribution of the target battery during the charging and discharging process from the temperature information, and;

[0061] Extract the deformation of the target battery during the charging and discharging process from the deformation information;

[0062] Obtain a basic digital model corresponding to the target battery;

[0063] The basic digital model is configured according to the temperature distribution and deformation conditions to obtain the digital model corresponding to the target battery.

[0064] Among them, the shape of the basic digital model is the same as that of the target battery, and the detailed geometric dimensions and shape data of the target battery can be directly obtained, including the length, width, height, and the dimensions of any internal structure. Then, based on the obtained dimensional data, an accurate three-dimensional model is created in the computer-aided design (CAD) software. This model includes all external and internal features of the battery, such as cells, shells, electrodes, and separators, and the basic digital model is constructed in the simulation software. Next, the temperature distribution of the target battery during the charging and discharging process is extracted from the temperature information, and the Kalman filter algorithm and the four-state lumped thermal model are used to estimate the temperature inside and on the surface of the lithium battery. At the same time, the mechanical behavior of the battery can be understood by monitoring the strain and acoustic signal intensity changes of the battery at different currents. The collected temperature distribution data is integrated into the digital model to simulate the temperature changes of the battery during the charging and discharging process. At the same time, the deformation data of the battery during the charging and discharging process is integrated into the digital model to simulate the expansion or contraction of the battery.

[0065] Optionally, in some embodiments of the present application, the step of “configuring the basic digital model according to the temperature distribution and deformation to obtain the digital model corresponding to the target battery” may specifically include:

[0066] According to the temperature distribution, a heating device and a temperature sensor are added to the preset position of the basic digital model; according to the deformation, a driving device and a pressure sensor are added to the preset position of the basic digital model, and the configured basic digital model is determined as the digital model corresponding to the target battery.

[0067] For example, based on the temperature distribution data, determine the areas where the heat generation is most concentrated in the battery cell. These areas will be the key locations for the heat generation devices and temperature sensors. According to the determined heat generation areas, add heat generation devices to the corresponding locations of the basic digital model. These heat generation devices can be resistance wires or other types of heating elements. Also, place temperature sensors near the heat generation areas. Ensure that the location of the sensors can accurately capture the temperature changes of the battery cells. At the same time, according to the deformation data of the battery cells during the charging and discharging process, determine the areas in the battery cells where the deformation is most significant. These areas will be the key locations for the drive devices and pressure sensors. According to the key deformation areas, add drive devices to the corresponding locations of the basic digital model. These devices can be mechanical devices used to simulate the expansion or contraction of the battery cells. Place pressure sensors near the deformation areas. Ensure that the sensors can accurately measure the pressure changes inside the battery cells. Then, set the correct parameters for the heat generation devices, temperature sensors, drive devices, and pressure sensors to ensure that their responses in the simulation are consistent with the actual physical devices. At the same time, assign the correct material properties to each component in the digital model to ensure that the simulated physical behavior is consistent with the actual situation. Run simulation tests to observe the operation of the heating device and temperature sensor, the driving device and the pressure sensor to ensure that they can accurately simulate the actual behavior of the battery cell. Compare the simulation results with the experimental data and make necessary adjustments and calibrations to the model.

[0068] Optionally, in some embodiments of the present application, the step of “adding a heating device and a temperature sensor at a preset position of the basic digital model according to the temperature distribution” may specifically include:

[0069] Divide the target battery into regions according to the temperature distribution;

[0070] According to the results of the area division, heating devices and temperature sensors are added at the preset positions of the basic digital model.

[0071] For example, specifically, Figure 2 As shown, according to the temperature distribution of the battery during the charging and discharging process, the temperature areas of the battery cell poles and large surfaces are divided. Then, according to the different area divisions, resistance heating wires with appropriate heating power and temperature sensors are placed in the aluminum shell of the battery cell of the same size.

[0072] Similarly, according to the deformation of the battery during the charging and discharging process, a drive device and a pressure sensor of appropriate power are placed. Optionally, in some embodiments of the present application, the drive device is composed of a driver and an auxiliary tooling corresponding to the driver. Optionally, in some embodiments of the present application, the drive device 20 is composed of a plurality of driver arrays.

[0073] 104. Simulate the digital model, and build a twin battery corresponding to the target battery based on the simulation results, so as to test the performance of the target battery based on the twin battery.

[0074] For example, specifically, appropriate simulation software can be selected according to the type and requirements of the digital model. Such as ANSYS, COMSOL Multiphysics or MATLAB / Simulink and other software. Then, according to the battery cell parameters of the target battery, set the physical parameters required for the simulation, such as conductivity, thermal conductivity, density, specific heat capacity, etc. Next, import the basic digital model into the simulation software, such as assigning correct material properties to various parts of the model to ensure that the physical behavior of the simulation is consistent with the actual situation. Optionally, the boundary conditions of the model, such as temperature, pressure, current, etc., can be defined, and the initial conditions of the simulation, such as initial temperature, initial voltage, etc., can be set. After setting all parameters and conditions, start the simulation process. After the simulation is completed, collect the simulation result data. The simulation results are compared with the expected or experimental data to verify the accuracy of the simulation. When the simulation results match the battery cell parameters, a twin battery corresponding to the target battery is constructed based on the simulation results to test the performance of the target battery according to the twin battery.

[0075] Optionally, in some embodiments of the present application, the step of “simulating the digital model, and constructing a twin battery corresponding to the target battery based on the simulation result, so as to test the performance of the target battery according to the twin battery” may specifically include:

[0076] Simulate the digital model and check whether the simulation results match the battery cell parameters;

[0077] When the simulation results match the cell parameters, a sample battery corresponding to the digital model is constructed;

[0078] Debugging the sample battery and detecting whether the debugging result matches the battery cell parameters;

[0079] When the debugging result matches the battery cell parameters, the sample battery is determined to be the twin battery corresponding to the target battery, so as to test the performance of the target battery based on the twin battery.

[0080] Start the simulation process of the digital model in the simulation software and ensure that all parameters and conditions are set correctly. After the simulation is completed, collect the simulation result data, including key parameters such as voltage, current, and temperature. Then, compare the simulation results with the actual parameters of the battery cell to check whether the parameters such as voltage, current, and temperature are within the expected range. When the simulation results match the battery cell parameters, build the actual sample battery according to the parameters and design of the digital model. During the sample battery manufacturing process, strict quality control is carried out to ensure that the physical properties of the sample battery are consistent with the digital model. When the debugging results of the sample battery completely match the battery cell parameters, it is determined that the sample battery is the twin battery corresponding to the target battery. Further performance testing is carried out using the twin battery to verify the performance and reliability of the target battery.

[0081] Optionally, in some embodiments of the present application, the step of “constructing a sample battery corresponding to the digital model when the simulation result matches the cell parameter” may specifically include:

[0082] When the simulation results match the battery cell parameters, the battery components corresponding to the digital model are obtained;

[0083] Obtaining preset circuit configuration information;

[0084] Based on the circuit configuration information and battery components, a sample battery corresponding to the digital model is constructed.

[0085] For example, the simulation output is compared with the actual parameters of the battery cell to check whether the voltage, current, temperature and other parameters are within the expected range. When the simulation result matches the battery cell parameters, the corresponding battery components, including battery cells, circuit boards, connecting wires, etc., can be obtained according to the simulation model. A heating component can be installed inside the battery cell, and the heating component can include a heating plate 1', a heating plate 2', a heating plate 3' and a heating plate 4'. The heating plate 1' and the heating plate 2' are respectively installed at the positive electrode and the negative electrode, and the heating plate 3' and the heating plate 4' are respectively installed on the opposite sides of the battery. Figure 2 As shown in (b), the final heat source is as follows Figure 2 (a) As shown. A control circuit and a negative feedback circuit are installed outside the battery cell to ensure that the battery charging and discharging process can be effectively controlled and managed. The design of the control circuit needs to consider the battery's charging and discharging characteristics, safety protection mechanism, and compatibility with the battery management system (BMS); the negative feedback circuit is installed to stabilize the battery's working state and improve the system's response speed and stability. Negative feedback can reduce the fluctuation of the output signal by adjusting the circuit parameters, thereby improving the control accuracy of the entire system, such as Figure 3As shown. After installing the resistance wire and the drive device in the battery cell housing, simulation software is used to simulate the heating characteristics of the resistance wire and the mechanical response of the drive device to predict the temperature and stress distribution of the battery cell during the charging and discharging process. The simulated temperature and stress distributions are compared with the data of the actual battery cell. This step is to verify the accuracy of the simulation model and ensure that the twin battery cell can accurately simulate the behavior of the real battery cell.

[0086] Further, the pole heating module and the large surface heating module: These modules are responsible for simulating the temperature changes of the target battery during the charging and discharging process in the twin battery. By adding heating modules to the pole and large surface parts of the battery cell, the temperature of these areas can be precisely controlled to match the actual temperature distribution of the target battery. The heating film can provide uniform heat across the entire surface of the battery cell, further ensuring the accuracy of the temperature simulation of the twin battery. Thermally conductive fillers and thermally conductive adhesives are used to improve the efficiency of thermal conduction, ensure that the heat inside the battery cell can be evenly distributed, and simulate the thermal characteristics of the target battery. The temperature sensor is used to monitor the temperature of the twin battery in real time to ensure that it is consistent with the temperature distribution of the target battery. The battery cell shell and the battery cell top cover provide physical protection for the battery cell and maintain the structural integrity of the battery cell. In the twin battery, the shape and material of these components are exactly the same as the target battery to ensure the accuracy of the deformation simulation.

[0087] The resistance wire and drive device installed in the battery cell casing are simulated, and the simulation results are compared with the actual charging and discharging temperature distribution and stress distribution of the finished battery cell. The driving current input into the external circuit of the twin battery cell during the charging and discharging process has been determined.

[0088] The temperature information and mechanical information sensed by the temperature sensors and mechanical sensors in the twin batteries will be input into the feedback circuit, thereby achieving more precise control of the charging and discharging temperature distribution and deformation of the twin cells and the real cells to achieve consistency.

[0089] Optionally, in some embodiments of the present application, the following may be specifically included:

[0090] When the simulation result does not match the battery cell parameters, the process returns to the step of generating a digital model corresponding to the target battery based on the temperature information and the deformation information;

[0091] When the debugging result does not match the battery cell parameters, the process returns to the step of generating a digital model corresponding to the target battery based on the temperature information and the deformation information.

[0092] First, identify the specific differences between the simulation or debugging results and the battery cell parameters. When the simulation results do not match the battery cell parameters, re-collect the temperature distribution data of the target battery during the charging and discharging process, and re-collect the deformation data of the target battery during the charging and discharging process. Then, adjust the parameters in the digital model, such as thermal conductivity, electrical conductivity, expansion coefficient, etc., based on the newly collected data. Re-simulate using the updated digital model. If the simulation results still do not match, continue to adjust the model parameters and structure until the simulation results are consistent with the battery cell parameters.

[0093] If the simulation results match, rebuild the sample battery based on the updated digital model. Debug the newly built sample battery to ensure that its performance is consistent with the target battery. Perform charge and discharge tests on the sample battery and collect performance data. Compare the test results with the cell parameters to verify whether the sample battery is an accurate twin of the target battery. If the test results of the sample battery match the cell parameters, determine that the sample battery is a twin battery.

[0094] The embodiment of the present application provides a battery testing method based on twin batteries. After obtaining the cell parameters of the target battery, the temperature information and deformation information of the target battery during the charging and discharging process are determined according to the cell parameters. Then, based on the temperature information and deformation information, a digital model corresponding to the target battery is generated. Finally, the digital model is simulated, and a twin battery corresponding to the target battery is constructed based on the simulation results to test the performance of the target battery according to the twin battery. The battery testing scheme based on twin batteries provided by the present application, when testing, determines the temperature information and deformation information of the target battery during the charging and discharging process according to the cell parameters of the target battery. Then, based on the temperature information and deformation information, a twin battery corresponding to the target battery is constructed. Thus, there is no need to consume a large number of physical cells, reducing the testing cost of batteries, battery modules, and battery packs. Moreover, when testing, there is no need for a large amount of repeated wiring, reducing the testing time of batteries, battery modules, and battery packs and shortening the development cycle of battery modules and battery packs.

[0095] In order to facilitate better implementation of the battery testing method based on twin batteries of the embodiment of the present application, the embodiment of the present application also provides a battery testing device based on the above-mentioned twin batteries (referred to as the testing device). The meaning of the nouns is the same as that in the above-mentioned battery testing method based on twin batteries, and the specific implementation details can refer to the description in the method embodiment.

[0096] See also Figure 4 , Figure 4 A schematic diagram of the structure of a battery testing device based on twin batteries provided in an embodiment of the present application, wherein the testing device may include an acquisition module 201, a determination module 202, a generation module 203 and a testing module 204, which may be specifically as follows:

[0097] The acquisition module 201 is used to acquire the cell parameters of the target battery.

[0098] The determination module 202 is used to determine the temperature information and deformation information of the target battery during the charging and discharging process according to the battery cell parameters.

[0099] The generation module 203 is used to generate a digital model corresponding to the target battery based on the temperature information and the deformation information.

[0100] Optionally, in some embodiments of the present application, the generating module 203 may specifically include:

[0101] An extraction unit, used to extract the temperature distribution of the target battery during the charging and discharging process from the temperature information, and to extract the deformation of the target battery during the charging and discharging process from the deformation information;

[0102] An acquisition unit, used for acquiring a basic digital model corresponding to a target battery;

[0103] The configuration unit is used to configure the basic digital model according to the temperature distribution and deformation conditions to obtain the digital model corresponding to the target battery.

[0104] Among them, the shape of the basic digital model is the same as the shape of the target battery.

[0105] Optionally, in some embodiments of the present application, the configuration unit may be specifically used to:

[0106] According to the temperature distribution, a heating device and a temperature sensor are added to the preset position of the basic digital model; according to the deformation, a driving device and a pressure sensor are added to the preset position of the basic digital model, and the configured basic digital model is determined as the digital model corresponding to the target battery.

[0107] Optionally, in some embodiments of the present application, the configuration unit may be specifically used to: divide the target battery into regions according to temperature distribution; and add a heating device and a temperature sensor at a preset position of the basic digital model according to the region division result.

[0108] Optionally, in some embodiments of the present application, the driving device consists of a driver and an auxiliary tooling corresponding to the driver.

[0109] Optionally, in some embodiments of the present application, the driving device is composed of a plurality of driver arrays.

[0110] The test module 204 is used to simulate the digital model and construct a twin battery corresponding to the target battery based on the simulation results, so as to test the performance of the target battery according to the twin battery.

[0111] Optionally, in some embodiments of the present application, the testing module 204 may specifically include:

[0112] A detection unit, used to simulate the digital model and detect whether the simulation result matches the battery cell parameters;

[0113] A construction unit, used for constructing a sample battery corresponding to the digital model when the simulation result matches the battery cell parameter;

[0114] The debugging unit is used to debug the sample battery and detect whether the debugging result matches the battery cell parameters;

[0115] The test unit is used to determine that the sample battery is a twin battery corresponding to the target battery when the debugging result matches the battery cell parameter, so as to test the performance of the target battery according to the twin battery.

[0116] Optionally, in some embodiments of the present application, the construction unit can be specifically used to: when the simulation results match the battery cell parameters, obtain the battery components corresponding to the digital model; obtain preset circuit configuration information; based on the circuit configuration information and the battery components, construct a sample battery corresponding to the digital model.

[0117] Optionally, in some embodiments of the present application, the construction unit can also be specifically used for: when the simulation results do not match the battery cell parameters, returning to the step of generating a digital model corresponding to the target battery based on the temperature information and deformation information; when the debugging results do not match the battery cell parameters, returning to the step of generating a digital model corresponding to the target battery based on the temperature information and deformation information.

[0118] The present application embodiment is a battery testing device based on twin batteries. After the acquisition module 201 acquires the battery cell parameters of the target battery, the determination module 202 determines the temperature information and deformation information of the target battery during the charging and discharging process according to the battery cell parameters. Then, the generation module 203 generates a digital model corresponding to the target battery based on the temperature information and deformation information. Finally, the test module 204 simulates the digital model and constructs a twin battery corresponding to the target battery based on the simulation results to test the performance of the target battery according to the twin battery. The battery testing solution based on twin batteries provided in the present application determines the temperature information and deformation information of the target battery during the charging and discharging process according to the battery cell parameters of the target battery during the test. Then, based on the temperature information and deformation information, the twin battery corresponding to the target battery is constructed. Thus, there is no need to consume a large number of physical batteries, reduce the testing cost of batteries, battery modules, and battery packs, and, when testing, there is no need for a large amount of repeated wiring, reduce the testing time of batteries, battery modules, and battery packs, and shorten the development cycle of battery modules and battery packs.

[0119] In addition, the present application also provides an electronic device, such as Figure 5 As shown, it shows a schematic diagram of the structure of the electronic device involved in the embodiment of the present application, specifically:

[0120] 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 5 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.

[0121] 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.

[0122] The memory 302 can be used to store software programs and modules, and the processor 301 executes various functional applications and battery tests based on twin batteries by running the software programs and modules stored in the memory 302. The memory 302 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 302 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 device. Accordingly, the memory 302 may also include a memory controller to provide the processor 301 with access to the memory 302.

[0123] 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.

[0124] 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.

[0125] 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:

[0126] Obtain the cell parameters of the target battery; determine the temperature information and deformation information of the target battery during the charging and discharging process based on the cell parameters; generate a digital model corresponding to the target battery based on the temperature information and deformation information; simulate the digital model, and construct a twin battery corresponding to the target battery based on the simulation results, so as to test the performance of the target battery based on the twin battery.

[0127] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0128] After obtaining the cell parameters of the target battery, the embodiment of the present application determines the temperature information and deformation information of the target battery during the charging and discharging process according to the cell parameters, then generates a digital model corresponding to the target battery based on the temperature information and deformation information, and finally simulates the digital model, and constructs a twin battery corresponding to the target battery based on the simulation results, so as to test the performance of the target battery according to the twin battery. The battery testing scheme based on twin batteries provided by the present application determines the temperature information and deformation information of the target battery during the charging and discharging process according to the cell parameters of the target battery during the test, and then constructs a twin battery corresponding to the target battery based on the temperature information and deformation information, thereby eliminating the need to consume a large number of physical cells, reducing the testing cost of batteries, battery modules, and battery packs, and also eliminating the need for a large amount of repeated wiring during the test, thereby reducing the testing time of batteries, battery modules, and battery packs and shortening the development cycle of battery modules and battery packs.

[0129] 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.

[0130] 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 battery testing method based on twin batteries provided in the embodiment of the present application. For example, the instructions can execute the following steps:

[0131] Obtain the cell parameters of the target battery; determine the temperature information and deformation information of the target battery during the charging and discharging process based on the cell parameters; generate a digital model corresponding to the target battery based on the temperature information and deformation information; simulate the digital model, and construct a twin battery corresponding to the target battery based on the simulation results, so as to test the performance of the target battery based on the twin battery.

[0132] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0133] The storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0134] Since the instructions stored in the storage medium can execute the steps in any one of the battery testing methods based on twin batteries provided in the embodiments of the present application, the beneficial effects that can be achieved by any one of the battery testing methods based on twin batteries provided in the embodiments of the present application can be achieved. Please see the previous embodiments for details and will not be repeated here.

[0135] The above is a detailed introduction to a battery testing method, device, electronic device and storage medium based on twin batteries 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 ideas of the present application, there will be changes in the specific implementation methods 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 testing method based on twin batteries, characterized in that: include: Get the cell parameters of the target battery; Determining temperature information and deformation information of the target battery during the charging and discharging process according to the battery cell parameters; Based on the temperature information and the deformation information, generating a digital model corresponding to the target battery; The digital model is simulated, and a twin battery corresponding to the target battery is constructed based on the simulation result, so as to test the performance of the target battery according to the twin battery.

2. The battery testing method based on twin batteries according to claim 1, characterized in that: The step of generating a digital model corresponding to the target battery based on the temperature information and the deformation information includes: extracting the temperature distribution of the target battery during the charging and discharging process from the temperature information, and; Extracting deformation conditions of the target battery during the charging and discharging process from the deformation information; Acquire a basic digital model corresponding to the target battery, wherein the shape of the basic digital model is the same as the shape of the target battery; The basic digital model is configured according to the temperature distribution and deformation conditions to obtain a digital model corresponding to the target battery.

3. The battery testing method based on twin batteries according to claim 2, characterized in that: The configuring the basic digital model according to the temperature distribution and deformation to obtain the digital model corresponding to the target battery includes: According to the temperature distribution, a heating device and a temperature sensor are added at the preset position of the basic digital model; according to the deformation, a driving device and a pressure sensor are added at the preset position of the basic digital model, and the configured basic digital model is determined as the digital model corresponding to the target battery.

4. The battery testing method based on twin batteries according to claim 3, characterized in that: The step of adding a heating device and a temperature sensor at a preset position of the basic digital model according to the temperature distribution comprises: Dividing the target battery into regions according to the temperature distribution; According to the area division result, a heating device and a temperature sensor are added at a preset position of the basic digital model.

5. The battery testing method based on twin batteries according to claim 3, characterized in that: The driving device is composed of a driver and an auxiliary tooling corresponding to the driver.

6. The battery testing method based on twin batteries according to claim 3, characterized in that: The driving device is composed of a plurality of driver arrays.

7. The battery testing method based on twin batteries according to any one of claims 1 to 6, characterized in that: The simulating the digital model and constructing a twin battery corresponding to the target battery based on the simulation result to test the performance of the target battery according to the twin battery includes: Simulating the digital model and detecting whether the simulation result matches the battery cell parameters; When the simulation result matches the battery cell parameters, a sample battery corresponding to the digital model is constructed; Debugging the sample battery and detecting whether the debugging result matches the battery cell parameters; When the debugging result matches the battery cell parameter, the sample battery is determined to be a twin battery corresponding to the target battery, so as to test the performance of the target battery based on the twin battery.

8. The battery testing method based on twin batteries according to claim 7, characterized in that: When the simulation result matches the cell parameter, a sample battery corresponding to the digital model is constructed, including: When the simulation result matches the battery cell parameter, a battery component corresponding to the digital model is obtained; Obtaining preset circuit configuration information; Based on the circuit configuration information and battery components, a sample battery corresponding to the digital model is constructed.

9. The battery testing method based on twin batteries according to claim 7, characterized in that: Also includes: When the simulation result does not match the battery cell parameter, returning to the step of generating a digital model corresponding to the target battery based on the temperature information and the deformation information; When the debugging result does not match the battery cell parameter, the process returns to the step of generating a digital model corresponding to the target battery based on the temperature information and the deformation information.

10. A battery testing device based on twin batteries, characterized in that: include: An acquisition module is used to obtain the cell parameters of the target battery; A determination module, used to determine the temperature information and deformation information of the target battery during the charging and discharging process according to the battery cell parameters; A generating module, used for generating a digital model corresponding to the target battery based on the temperature information and the deformation information; A testing module is used to simulate the digital model and construct a twin battery corresponding to the target battery based on the simulation results, so as to test the performance of the target battery according to the twin battery.

11. 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 testing method based on twin batteries as described in any one of claims 1 to 9 are implemented.

12. 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 testing method based on twin batteries as described in any one of claims 1 to 9 are implemented.

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