Battery lithium precipitation test method and device, computer equipment, storage medium and program product

Abstract

The invention relates to a battery lithium precipitation test method and device, computer equipment, a storage medium and a program product. The method comprises the following steps: in response to battery parameters of a plurality of virtual batteries input by a user in a parameter input area of a battery simulation display interface, performing a lithium precipitation test according to each battery parameter to obtain a lithium precipitation test result corresponding to each virtual battery, and displaying lithium precipitation test results corresponding to the virtual batteries in a test result display area of the battery simulation display interface, wherein the battery parameters comprise copper foil information of the virtual batteries. According to the method, sample batteries with different copper foil information do not need to be manufactured, and the lithium precipitation test result corresponding to each virtual battery can be determined only by inputting the battery parameters of the virtual batteries with different copper foil information into the battery simulation interface, so that the test efficiency of the lithium precipitation condition of the battery is greatly improved; in addition, sample batteries with different porous copper foil blank spaces do not need to be manufactured, and waste of resources is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of lithium batteries, and in particular to a test method, device, computer equipment, storage medium and program product for battery lithium deposition. Background Art

[0002] With the rapid development of lithium battery technology, its application in electric vehicles, portable electronic devices and energy storage is becoming more and more extensive. However, with the widespread application of lithium batteries, some problems have gradually emerged, one of which is the lithium plating problem caused by uneven coating on both sides of the negative electrode.

[0003] Lithium deposition not only reduces the performance of lithium batteries, but may also cause safety hazards and affect the reliability and life of the equipment. To solve the above problems, researchers have proposed setting up porous copper foil materials on the battery, which can increase the energy density to a certain extent, thereby reducing the risk of lithium deposition. At present, the research method based on the effect of porous copper foil on lithium deposition of batteries is mainly achieved by making sample batteries with different porous copper foils and testing each sample battery.

[0004] However, existing testing methods for lithium plating of batteries have the problem of low efficiency. Summary of the invention

[0005] Based on this, it is necessary to provide a battery lithium deposition testing method, device, computer equipment, storage medium and program product that can improve the lithium deposition testing efficiency of lithium batteries in response to the above technical problems.

[0006] In a first aspect, the present application provides a battery lithium deposition testing method, comprising:

[0007] In response to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery; the battery parameters include copper foil information of the virtual battery;

[0008] The lithium plating test results corresponding to each virtual battery are displayed in the test result display area of ​​the battery simulation display interface.

[0009] In one embodiment, the battery parameters further include basic structure information, the parameter input area includes a first input area and a second input area, and the battery parameters of the multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface include:

[0010] The basic structure information of each virtual battery is input in the first input area in response to the user, and the copper foil information of each virtual battery is input in the second input area in response to the user.

[0011] In one embodiment, the battery simulation display interface further includes a model display area, and the method further includes:

[0012] According to the basic structure information of each virtual battery and the copper foil information of each virtual battery, a simulation model corresponding to each virtual battery is constructed; the blank ratio of the copper foil structure included in the simulation models of different virtual batteries is different;

[0013] The simulation model corresponding to each virtual battery is displayed in the model display area.

[0014] In one embodiment, the model display area includes a graphic display area and a lithium analysis display control, and the simulation model corresponding to each virtual battery is displayed in the model display area, including:

[0015] Displaying the simulation model corresponding to each virtual battery in the graphic display area;

[0016] In response to the user triggering the lithium deposition display control in the model display area, the lithium deposition concentration and the lithium ion diffusion path are highlighted in the simulation model of each virtual battery.

[0017] In one embodiment, the parameter input area further includes a test period editing area, and the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface are responded to, and a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery, including:

[0018] In response to the time period input by the user in the test period editing area, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery in the time period.

[0019] In one embodiment, the lithium deposition test is performed according to the battery parameters to obtain the lithium deposition test results corresponding to the virtual batteries, including:

[0020] Obtain basic structural information of each virtual battery and preset test time;

[0021] A lithium deposition test is performed according to the basic structure information, copper foil information and preset test time of each virtual battery to obtain a lithium deposition test result corresponding to each virtual battery.

[0022] In one embodiment, the lithium plating test results corresponding to each virtual battery are displayed in the test result display area of ​​the battery simulation display interface, including:

[0023] Collecting statistics on the lithium deposition test results corresponding to each virtual battery and generating a test curve graph including the test results of multiple virtual batteries;

[0024] The test curve graph is displayed in the test result display area.

[0025] In one embodiment, the test result display area further includes a local image display area and a local display time editing area, and the method further includes:

[0026] Responding to the time range input by the user in the local display time editing area, and intercepting the local test curve graph corresponding to the time range from the test curve graph;

[0027] A local test curve graph is displayed in the local image display area.

[0028] In one embodiment, the method further comprises:

[0029] Among the multiple test curves in the test curve diagram, a target test curve is marked with a preset label; the target test curve indicates that the lithium deposition time of the virtual battery is the latest when the potential is the first value.

[0030] In a second aspect, the present application also provides a battery lithium deposition testing device, comprising:

[0031] A response module is used to respond to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, perform lithium deposition test according to each battery parameter, and obtain the lithium deposition test result corresponding to each virtual battery; the battery parameters include the copper foil information of the virtual battery;

[0032] The display module is used to display the lithium plating test results corresponding to each virtual battery in the test result display area of ​​the battery simulation display interface.

[0033] In a third aspect, the present application further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0034] In response to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery; the battery parameters include copper foil information of the virtual battery;

[0035] The lithium plating test results corresponding to each virtual battery are displayed in the test result display area of ​​the battery simulation display interface.

[0036] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0037] In response to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery; the battery parameters include copper foil information of the virtual battery;

[0038] The lithium plating test results corresponding to each virtual battery are displayed in the test result display area of ​​the battery simulation display interface.

[0039] In a fifth aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0040] In response to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery; the battery parameters include copper foil information of the virtual battery;

[0041] The lithium plating test results corresponding to each virtual battery are displayed in the test result display area of ​​the battery simulation display interface.

[0042] The above-mentioned battery lithium deposition testing method, device, computer equipment, storage medium and program product, the above-mentioned method does not need to produce sample batteries with different copper foil information, only needs to input the battery parameters of virtual batteries with different copper foil information into the battery simulation interface, and the lithium deposition test results corresponding to each virtual battery can be determined, which greatly improves the test efficiency of battery lithium deposition; in addition, there is no need to produce sample batteries with different porous copper foil blanks, avoiding waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0044] FIG1 is an application environment diagram of a battery lithium deposition testing method according to an embodiment;

[0045] Figure 2 A schematic flow chart of a method for testing battery lithium deposition in one embodiment;

[0046] Figure 3 A schematic flow chart of a method for testing battery lithium deposition in another embodiment;

[0047] Figure 4 A schematic flow chart of a method for testing battery lithium deposition in another embodiment;

[0048] Figure 5 is a schematic diagram of a simulation model of a virtual battery in one embodiment;

[0049] Figure 6is a schematic diagram of a simulation model of a virtual battery in another embodiment;

[0050] Figure 7 A schematic flow chart of a method for testing battery lithium deposition in another embodiment;

[0051] Figure 8 A schematic flow chart of a method for testing battery lithium deposition in another embodiment;

[0052] Fig. 9 is a schematic diagram of a full-cell voltage of a virtual battery in one embodiment;

[0053] Fig.10 is a schematic diagram of the negative electrode potential of a virtual battery in one embodiment;

[0054] Fig.11 A schematic flow chart of a method for testing battery lithium deposition in another embodiment;

[0055] Fig.12 A schematic flow chart of a method for testing battery lithium deposition in another embodiment;

[0056] FIG. 13 is a structural block diagram of a battery lithium deposition testing device in one embodiment. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0058] With the rapid development of lithium battery technology, its application in electric vehicles, portable electronic devices and energy storage is becoming more and more extensive. However, with the widespread application of lithium batteries, some problems have gradually emerged, one of which is the lithium plating problem caused by uneven coating on both sides of the negative electrode.

[0059] Lithium deposition not only reduces the performance of lithium batteries, but may also cause safety hazards and affect the reliability and life of the equipment. To solve the above problems, researchers have proposed to set a porous copper foil material on the battery, which can increase the energy density to a certain extent, thereby reducing the risk of lithium deposition. At present, the research method based on porous copper foil on the lithium deposition of batteries is mainly achieved by making sample batteries with different porous copper foils and testing each sample battery. However, the existing test methods for lithium deposition of batteries have the problem of low efficiency. This application aims to solve this problem.

[0060] After the above introduction to the background technology of the battery lithium deposition test method provided by the embodiment of the present application, the implementation environment involved in the battery lithium deposition test method provided by the embodiment of the present application will be briefly described below. The battery lithium deposition test method provided by the embodiment of the present application can be applied to a computer device as shown in Figure 1. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store battery parameter data of multiple virtual batteries. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a battery lithium deposition test method is implemented.

[0061] Those skilled in the art will understand that the structure shown in FIG. 1 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. A specific terminal may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0062] After introducing the application scenarios of the battery lithium deposition test method provided in the embodiments of the present application, the following focuses on the battery lithium deposition test method described in the present application.

[0063] In one embodiment, Figure 2 As shown, a battery lithium deposition test method is provided, and the method is applied to the computer device in FIG. 1 as an example for description, comprising the following steps:

[0064] S201 . In response to battery parameters of multiple virtual batteries input by a user in a parameter input area of ​​a battery simulation display interface, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery.

[0065] The battery simulation display interface may be a software interface capable of analyzing the performance of the battery, for example, a finite element simulation interface.

[0066] Among them, the battery simulation display interface may include a parameter input area, a model display area and a test result display area; the parameter input area is used to receive the battery parameters of the virtual battery input by the user, and the parameter input area can receive the battery parameters of at least one virtual battery, and, in the case where the parameter input area receives the battery parameters of multiple virtual batteries, the battery parameters of one virtual battery can be received first, and after receiving the operation of the save control triggered by the user in the parameter input area, the battery parameters of the input virtual battery can be saved, and the battery parameters of the next virtual battery input by the user can be received, ..., until all the battery parameters of the virtual batteries input by the user are received.

[0067] Among them, the battery parameters include the copper foil information of the virtual battery and the basic structure information of the virtual battery. The copper foil information refers to the proportion of the porous copper foil to the entire negative electrode current collector. The basic structure information includes the solid phase volume fraction, porosity, maximum lithium insertion concentration of the positive electrode, maximum lithium insertion concentration of the negative electrode, and equivalent porosity of the porous copper foil. wait.

[0068] Among them, the test result display area is used to determine and display the lithium plating test mechanism corresponding to the virtual battery according to the battery parameters of the virtual battery, and when the battery parameters of multiple virtual batteries are input in the parameter input area, the test curve between each virtual battery and the corresponding lithium plating situation is displayed.

[0069] In an embodiment of the present application, when it is necessary to test the lithium deposition of batteries containing different copper foil information, virtual batteries with different copper foil information can be designed first, and the battery parameters of the virtual batteries with different copper foil information can be input into the parameter input area in the battery simulation display interface, so that the computer device responds to the battery parameters of multiple virtual batteries input by the user in the parameter input area in the battery simulation display interface, and performs lithium deposition tests according to the battery parameters of each virtual battery to obtain the lithium deposition test results corresponding to each virtual battery.

[0070] Optionally, when inputting battery parameters of virtual batteries with different copper foil information into the parameter input area, the battery parameters of virtual batteries with different copper foil information can be input into the parameter input area in sequence, for example, first inputting the battery parameters of virtual battery 1 into the parameter input area, then triggering the save control of the parameter input area, then inputting the battery parameters of virtual battery 2 into the parameter input area, then triggering the save control of the parameter input area, ..., until the battery parameters of all virtual batteries are input into the parameter input area. In addition, the battery parameters of virtual batteries with different copper foil information can also be input into the parameter input area at the same time.

[0071] S202: Displaying the lithium deposition test results corresponding to each virtual battery in the test result display area of ​​the battery simulation display interface.

[0072] In the embodiment of the present application, after the lithium deposition test results corresponding to each virtual battery are determined as described above, the lithium deposition test results corresponding to each virtual battery can be displayed on the battery simulation display interface.

[0073] The battery lithium deposition test provided in the embodiment of the present application responds to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, performs lithium deposition tests according to the battery parameters, obtains the lithium deposition test results corresponding to each virtual battery, and displays the lithium deposition test results corresponding to each virtual battery in the test result display area of ​​the battery simulation display interface, and the battery parameters include the copper foil information of the virtual battery. The above method does not need to produce sample batteries with different copper foil information, but only needs to input the battery parameters of the virtual batteries with different copper foil information into the battery simulation interface to determine the lithium deposition test results corresponding to each virtual battery, which greatly improves the test efficiency of the battery lithium deposition situation; in addition, there is no need to produce sample batteries with different porous copper foil blanks, which avoids waste of resources.

[0074] In one embodiment, Figure 2 On the basis of the embodiment shown, the battery parameters further include basic structure information, the parameter input area includes a first input area and a second input area, and the S201 "responding to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface" further includes:

[0075] The basic structure information of each virtual battery is input in the first input area in response to the user, and the copper foil information of each virtual battery is input in the second input area in response to the user.

[0076] In an embodiment of the present application, the input method of the battery parameters of the virtual battery can also be described. The above-mentioned battery parameters include not only the copper foil information of the virtual battery, but also the basic structure information of the virtual battery. The user can input the basic structure information of each virtual battery in the first input area in the parameter input area, and input the copper foil information of each virtual battery in the second input area in the parameter input area, so that the computer device responds to the basic structure information of each virtual battery input by the user in the first input area, and responds to the copper foil information of each virtual battery input by the user in the second input area.

[0077] Optionally, since the basic structure information of each virtual battery is the same, the basic structure information of each virtual battery can be directly input in the first input area, and then different copper foil information can be input in the second input area.

[0078] An embodiment of the present application provides a method for inputting battery parameters, which is implemented through a first input area and a second input area. Since the basic structure information of each virtual battery is the same, the basic structure information of each virtual battery can be simultaneously input through the first input area, which greatly simplifies the input method of battery parameters, thereby improving the test efficiency of battery lithium deposition.

[0079] In one embodiment, Figure 2 Based on the embodiment shown, the battery simulation display interface further includes a model display area, such as Figure 3 As shown, the above method also includes:

[0080] S301 . Constructing a simulation model corresponding to each virtual battery according to basic structure information of each virtual battery and copper foil information of each virtual battery.

[0081] Among them, different virtual battery simulation models contain different blank ratios of copper foil structures.

[0082] Among them, the simulation model refers to the battery structure model constructed by the simulation software based on the battery parameters of the virtual battery.

[0083] In the embodiment of the present application, after the battery parameters of each virtual battery are received, a simulation model of each virtual battery may be constructed according to the battery parameters of each virtual battery.

[0084] S302: Display the simulation model corresponding to each virtual battery in the model display area.

[0085] Among them, the model display area is used to generate and display the simulation model corresponding to each virtual battery according to the battery parameters of the virtual battery input by the user; optionally, the simulation model of any one of the multiple virtual batteries can be displayed in the model display area, and the simulation models of multiple virtual batteries can also be displayed in the model display area.

[0086] Among them, the model display area may include multiple controls, which are used to flexibly display the simulation model of the virtual battery to the user. For example, the model display area may include a first switching control, a second switching control, a clockwise rotation control and a counterclockwise rotation control, etc., wherein the first switching control is used to switch to the simulation model corresponding to the previous virtual battery, the second switching control is used to switch to the simulation model corresponding to the next virtual battery, the clockwise rotation control is used to rotate the simulation model of the current virtual battery in a clockwise direction by a preset angle, and the counterclockwise rotation control is used to rotate the simulation model of the current virtual battery in a counterclockwise direction by a preset angle.

[0087] In the embodiment of the present application, after the simulation models of each virtual battery are constructed as described above, the simulation models corresponding to the multiple virtual batteries are displayed in the model display area. Optionally, the model display area may display the simulation model of the first virtual battery received by default, and when receiving the second switching control triggered by the user in the model display area, display the simulation model of the second virtual battery received, and when receiving the clockwise rotation control triggered by the user in the model display area, display the simulation model of the second virtual battery after rotating the simulation model clockwise by a preset angle, and when receiving the counterclockwise rotation control triggered by the user in the model display area, display the simulation model of the second virtual battery after rotating the simulation model counterclockwise by a preset angle.

[0088] The display method of the simulation model provided in the embodiment of the present application enables the user to view the simulation model of the virtual battery in real time, so as to promptly discover the inconsistency between the simulation model of the virtual battery and the battery parameters of the virtual battery, thereby avoiding the mismatch between the subsequently determined lithium plating situation and the copper foil information, and ensuring the accuracy of the battery lithium plating test.

[0089] In one embodiment, Figure 3 Based on the embodiment shown, the above model display area includes a graphic display area and a lithium analysis display control, such as Figure 4 As shown, the above S302 "displaying the simulation model corresponding to each virtual battery in the model display area" includes:

[0090] S401, displaying the simulation model corresponding to each virtual battery in the graphic display area.

[0091] In the embodiment of the present application, after the simulation model corresponding to each virtual battery is obtained as described above, the simulation model corresponding to each virtual battery can be displayed in the graphic display area in the model display area, such as Figure 5 Shown is a schematic diagram of the simulation model corresponding to each virtual battery in the graphic display area.

[0092] For example, Figure 5 The simulation models corresponding to four virtual batteries are shown in the figure. The upper left corner is the simulation model corresponding to the virtual battery in which the negative electrode current collector is fully covered by traditional copper foil, the upper right corner is the simulation model corresponding to the virtual battery in which the negative electrode current collector is fully covered by porous copper foil, the lower left corner is the simulation model corresponding to the virtual battery in which the negative electrode current collector is covered 20% by traditional copper foil and 80% by porous copper foil, and the lower right corner is the simulation model corresponding to the virtual battery in which the negative electrode current collector is covered 50% by traditional copper foil and 50% by porous copper foil.

[0093] Below, we take the simulation model corresponding to the virtual battery in the upper left corner image where the negative electrode current collector is fully covered by the traditional copper foil as an example. Figure 5The other areas of the simulation model are introduced in the figure. Boundary 1 and boundary 3 are positive electrode current collectors, made of aluminum foil. The positive electrode is adjacent to boundary 1 and boundary 3 respectively. The white area adjacent to the positive electrode is the separator. The gray area adjacent to the separator is the negative electrode. The negative electrode is adjacent to the negative electrode (i.e. boundary 2). It should be noted that the positive electrode, negative electrode, separator, positive electrode current collector and negative electrode current collector are respectively given the properties of lithium iron phosphate material, graphite material, separator material, Al and Cu; in addition, the pore area of ​​the porous copper foil is replaced by the electrolyte property.

[0094] S402, in response to the user triggering the lithium deposition display control in the model display area, highlighting the lithium deposition concentration and the lithium ion diffusion path in the simulation model of each virtual battery.

[0095] In the embodiment of the present application, the model display area also includes a lithium precipitation display control, and the user can trigger the lithium precipitation display control in the model display area. The computer device responds to the user's operation of triggering the lithium precipitation display control in the model display area, and highlights the lithium precipitation concentration and lithium ion diffusion path in the simulation model of each virtual battery. Figure 6 As shown, it shows Figure 5 The corresponding simulation model of the virtual battery showing the lithium concentration and lithium ion diffusion path, from Figure 6 As can be seen in the upper left image, there is no Li in the traditional copper foil. + Diffusion streamlines, indicating that Li + will not diffuse between the A and B sides, which may cause Li + Excessive precipitation on the A and B surfaces; Li is present in the porous copper foil in the upper right corner image + Diffusion streamlines, indicating that Li + will diffuse between the A and B surfaces, which causes Li + The probability of excessive precipitation on the A and B surfaces is small; there is no Li on the porous copper foil in the lower left corner image + Concentration indicates that there is no porous copper foil where Li is likely to appear + There is no Li precipitation in the porous copper foil in the lower right corner of the image. + Concentration indicates that there is no porous copper foil where Li is likely to appear + That is to say, compared with the Base group, during the charging stage, the pores of the porous copper foil allow excess lithium ions on the B side to diffuse to the A side, making the lithium ion concentration distribution on the A and B sides more uniform, which leads to a higher potential of the separator / negative electrode on the B side, which is manifested as a delay in the triggering moment of lithium precipitation, that is, a reduction in the risk of lithium precipitation.

[0096] The method for displaying lithium deposition concentration and lithium ion diffusion path provided in the embodiment of the present application provides the user with an obvious display of lithium deposition conditions, thereby improving the efficiency of judging the lithium deposition degree of virtual batteries with different copper foil conditions.

[0097] In one embodiment, Figure 2 On the basis of the embodiment shown, the parameter input area further includes a test period editing area, and the above S201 "responds to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, performs a lithium deposition test according to each of the battery parameters, and obtains a lithium deposition test result corresponding to each of the virtual batteries", further includes:

[0098] In response to the time period input by the user in the test period editing area, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery in the time period.

[0099] In an embodiment of the present application, the user can also enter a time period of interest in the test period editing area in the parameter input area. After the computer device responds to the time period entered by the user in the test period editing area, and after determining the lithium plating test results of each virtual battery based on each battery parameter, the computer device then intercepts the lithium plating test results corresponding to the time period in the lithium plating test results based on the time period entered by the user in the test period editing area.

[0100] The method for obtaining the lithium plating test results of the corresponding time period provided in the embodiment of the present application can provide the user with the corresponding lithium plating situation display according to the user's needs, thereby improving the efficiency of judging the lithium plating degree of virtual batteries with different copper foil conditions.

[0101] In one embodiment, Figure 2 Based on the embodiment shown, the method for obtaining the lithium deposition test result can be described as follows: Figure 7 As shown, the above S201 "perform a lithium deposition test according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery" includes:

[0102] S501, obtaining basic structural information of each virtual battery and preset test time.

[0103] In an embodiment of the present application, basic structural information and preset test time of each virtual battery can be obtained from a preset storage database; optionally, the basic structural information of each virtual battery can be pre-stored in the preset storage database, and the preset test time can be entered by the user in the parameter input area, or can be pre-stored in the preset storage database.

[0104] S502 , performing a lithium deposition test according to basic structure information, copper foil information and preset test time of each virtual battery, and obtaining a lithium deposition test result corresponding to each virtual battery.

[0105] Among them, the lithium plating test results include the correspondence between the negative electrode potential and time of different virtual batteries, and the correspondence between the full battery voltage and time of different virtual batteries. It should be noted that the user can analyze the lithium plating situation of each virtual battery based on the correspondence between the negative electrode potential and time, or the correspondence between the full battery voltage and time.

[0106] In the embodiment of the present application, after the basic structure information and preset test time of each virtual battery are obtained as described above, and the copper foil information of each virtual battery input by the user is received, a lithium extraction operation can be performed according to the basic structure information, copper foil information and preset test time of the virtual battery to obtain the lithium extraction test result corresponding to each virtual battery. Optionally, the operation process of the lithium extraction operation is provided below:

[0107] First, in the solid phase region of the electrode (positive and negative current collectors (such as Figure 5 Boundary 1, Boundary 2 and Boundary 3 shown) and positive and negative electrode material areas (such as Figure 5 The charge conservation of the two sides of the diaphragm shown in the figure satisfies the following formula (1):

[0108]

[0109] in is the solid phase current density, According to Ohm's law, it is shown in the following formula (2):

[0110]

[0111] Above is the conductivity, is the solid phase potential. The solid phase diffusion process of lithium ions inside lithium iron phosphate and graphite active particles can be solved by the Fick law formula (3) as follows:

[0112]

[0113]

[0114] in and are the flow rate and diffusion coefficient of lithium ions diffusing inside the active particles, is the solid phase lithium ion concentration.

[0115] Secondly, the electrolyte in the pore area of ​​the positive and negative electrode sheets, the separator and the porous copper foil satisfies the charge and mass conservation as shown in the following formula (5):

[0116]

[0117] in is the liquid phase current density, caused by the diffusion and migration of lithium ions in the electrolyte. Satisfies the following formula (6):

[0118]

[0119] in and are the liquid phase potential and the lithium ion conductivity of the electrolyte, R and T are the temperature and the Faraday constant, respectively. is the ion migration number, f is the average molar activity coefficient of the electrolyte. The charge transfer rate is related to the overpotential. It can be described by the Butler-Volmer equation shown in the following formulas (7)-(9):

[0120]

[0121]

[0122]

[0123] In the formula and are the anode and cathode reaction transfer coefficients, is the reference exchange current density, is the equilibrium potential of lithium iron phosphate or graphite active particles for lithium extraction (intercalation), and are the anode and cathode reaction rate constants, , and are the maximum lithium insertion concentration of lithium ions in the active particles, the reference lithium ion concentration of the electrolyte, and the lithium ion concentration in the electrolyte, respectively. and Φl are the solid phase and liquid phase potentials respectively. In actual measurement, the positive electrode can be measured. and , calculate the positive electrode potential Similarly, the negative electrode can be measured and , calculate the negative electrode potential , and further determine the full battery voltage V cell =Positive electrode potential-negative electrode potential.

[0124] Furthermore, the lithium ion transfer control equation in the electrolyte is expressed by equations (10)-(11):

[0125]

[0126]

[0127] in and are the diffusion rate and diffusion coefficient of lithium ions in the electrolyte, respectively.

[0128] Furthermore, by combining the above formulas (1)-(11), the positive electrode potential and negative electrode potential of the virtual battery can be obtained, and the difference between the positive electrode potential and the negative electrode potential is used as the full battery voltage to obtain the lithium plating test results corresponding to each virtual battery.

[0129] The method for determining the lithium plating test results provided in the embodiments of the present application provides a theoretical basis for the subsequent analysis of the lithium plating conditions of different virtual batteries based on the test results.

[0130] In one embodiment, Figure 2 Based on the embodiment shown, the method of displaying the lithium precipitation test results can be described as follows: Figure 8 As shown, the above S202 "displaying the lithium deposition test results corresponding to each virtual battery in the test result display area of ​​the battery simulation display interface" includes:

[0131] S601. Collect statistics on lithium deposition test results corresponding to each virtual battery, and generate a test curve graph including the test results of multiple virtual batteries.

[0132] In the embodiment of the present application, after obtaining the lithium deposition test results corresponding to each virtual battery, the computer device can collect statistics on the lithium deposition test results corresponding to each virtual battery to obtain a test curve graph including the test results of multiple virtual batteries. Fig. 9 As shown, the full battery voltages corresponding to the virtual battery (Base) in which the negative electrode current collector is completely covered by traditional copper foil, the virtual battery completely covered by porous copper foil (0% blank), the virtual battery 20% covered by traditional copper foil (20% blank), and the virtual battery 50% covered by traditional copper foil (50% blank) are shown; in addition, from Fig. 9 It can be seen from the full battery voltage curve that the porous copper foil does not significantly increase the battery polarization (impedance R0 increases), where the average battery impedance R0 = (V1-V2) / I0 is calculated by combining the potentials V1 and V2 of boundary 3 and boundary 2. Fig.10 As shown, the negative electrode potentials corresponding to the virtual battery (Base) in which the negative electrode current collector is completely covered by traditional copper foil, the virtual battery in which the negative electrode current collector is completely covered by porous copper foil (0% blank), the virtual battery in which 20% is covered by traditional copper foil (20% blank), and the virtual battery in which 50% is covered by traditional copper foil (50% blank) are respectively shown.

[0133] S502: Display a test curve graph in a test result display area.

[0134] In the embodiment of the present application, after the test curve graph including the test results of multiple virtual batteries is obtained, the test curve graph can be displayed in the test result display area. For example, multiple negative electrode potentials are displayed in the test result display area, and the user can compare which curve in the test curve graph has the latest intersection with the moment when the negative electrode potential is 0, and use the copper foil information of the virtual battery corresponding to the curve with the latest intersection as the optimal copper foil information.

[0135] The method for displaying lithium deposition test results provided in the embodiments of the present application facilitates users to compare and analyze multiple test curves in the test curve diagram, thereby improving the analysis efficiency of battery lithium deposition.

[0136] In one embodiment, Figure 8 Based on the embodiment shown in the figure, the test result display area further includes a local image display area and a local display time editing area, such as Fig.11 As shown, the above method also includes:

[0137] S603, responding to the time range input by the user in the local display time editing area, and intercepting the local test curve graph corresponding to the time range from the test curve graph.

[0138] In an embodiment of the present application, the user can also enter a time range in the local display time editing area in the test result display area. After the computer device responds to the time range entered by the user in the local display time editing area, it intercepts the local test curve graph corresponding to the time range from the test curve graph.

[0139] S604: Display a local test curve graph in the local image display area.

[0140] In the embodiment of the present application, after the local test curve graph corresponding to the time range is obtained, the local test curve graph corresponding to the time range can be displayed in the local display area. Fig. 9 and Fig.10 The test curve diagram of the enlarged part is a local test curve corresponding to the time range intercepted according to the input time range.

[0141] The method for displaying lithium deposition test results provided in the embodiments of the present application facilitates users to compare and analyze multiple test curves in the test curve diagram, thereby improving the analysis efficiency of battery lithium deposition.

[0142] In one embodiment, Figure 8 Based on the embodiment shown, Fig.12 As shown, the above method also includes:

[0143] S605 . Among the multiple test curves in the test curve graph, mark the target test curve with a preset label.

[0144] The target test curve indicates that the lithium deposition time of the virtual battery is the latest when the potential is at a first value, and the first value is 0.

[0145] In the embodiment of the present application, among the multiple test curves in the test curve diagram, a preset label can be used to mark the curve with the latest lithium deposition time of the virtual battery when the potential is 0, for example, Fig.10 As shown, the lithium plating time is the latest when the negative electrode current collector is fully covered by the porous copper foil, indicating that lithium plating is less likely to occur when the negative electrode current collector is fully covered by the porous copper foil.

[0146] The method for displaying lithium deposition test results provided in the embodiments of the present application facilitates users to intuitively determine the latest test curve for lithium deposition, thereby greatly improving the analysis efficiency of battery lithium deposition.

[0147] It should be noted that the basic process of simulating virtual batteries with different porous copper foil blanks to obtain the test curve graph includes:

[0148] (1) Input the geometric parameters of virtual batteries with different porous copper foil blanks on the simulation interface of the simulation software;

[0149] (2) Drawing geometric structures according to geometric parameters of virtual batteries with different porous copper foil blanks to obtain virtual models corresponding to virtual batteries with different porous copper foil blanks;

[0150] (3) Conservation equations are established, and the solution domain materials and other physical property parameters are set. Meshing and solver settings are performed to obtain the test curves corresponding to virtual batteries with different porous copper foil blanks.

[0151] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0152] Based on the same inventive concept, the embodiment of the present application also provides a battery lithium deposition test device for implementing the battery lithium deposition test method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more battery lithium deposition test device embodiments provided below can refer to the limitations of the battery lithium deposition test method above, and will not be repeated here.

[0153] In an exemplary embodiment, as shown in FIG13 , a battery lithium deposition test device is provided, comprising: a response module 10 and a display module 11, wherein:

[0154] The response module 10 is used to respond to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, perform lithium deposition test according to each battery parameter, and obtain the lithium deposition test result corresponding to each virtual battery; the battery parameters include the copper foil information of the virtual battery.

[0155] The display module 11 is used to display the lithium deposition test results corresponding to each virtual battery in the test result display area of ​​the battery simulation display interface.

[0156] In an exemplary embodiment, the above-mentioned battery parameters also include basic structure information, the parameter input area includes a first input area and a second input area, and the above-mentioned response module 10 includes: a first response unit, specifically used to respond to the basic structure information of each virtual battery entered by the user in the first input area, and to respond to the copper foil information of each virtual battery entered by the user in the second input area.

[0157] In an exemplary embodiment, the battery simulation display interface further includes a model display area, and the response module 10 further includes: a construction unit and a display unit, wherein:

[0158] A construction unit, specifically used to construct a simulation model corresponding to each virtual battery according to basic structure information of each virtual battery and copper foil information of each virtual battery; different simulation models of virtual batteries contain different blanking ratios of copper foil structures;

[0159] The display unit is specifically used to display the simulation model corresponding to each virtual battery in the model display area.

[0160] In an exemplary embodiment, the above-mentioned model display area includes a graphic display area and a lithium ion display control, and the above-mentioned display unit is specifically used to display the simulation model corresponding to each virtual battery in the graphic display area; in response to the user triggering the operation of the lithium ion display control in the model display area, the lithium ion concentration and the lithium ion diffusion path are highlighted in the simulation model of each virtual battery.

[0161] In an exemplary embodiment, the parameter input area also includes a test period editing area, and the response module 10 also includes: a second response unit, which is specifically used to respond to the time period input by the user in the test period editing area, perform lithium plating test according to each battery parameter, and obtain the lithium plating test results corresponding to each virtual battery in the time period.

[0162] In an exemplary embodiment, the above-mentioned response module 10 further includes: an acquisition unit and a determination unit, wherein:

[0163] An acquisition unit, specifically used to acquire basic structural information of each virtual battery and preset test time;

[0164] The determination unit is specifically used to perform a lithium deposition test according to the basic structure information, copper foil information and preset test time of each virtual battery to obtain a lithium deposition test result corresponding to each virtual battery.

[0165] In an exemplary embodiment, the display module 11 includes: a statistical unit and a display unit, wherein:

[0166] A statistical unit, specifically used to collect statistics on the lithium deposition test results corresponding to each virtual battery, and generate a test curve graph including the test results of multiple virtual batteries;

[0167] The display unit is specifically used to display the test curve graph in the test result display area.

[0168] In an exemplary embodiment, the test result display area further includes a local image display area and a local display time editing area, and the display module 11 further includes a response unit and a display unit, wherein:

[0169] A response unit, specifically used to respond to the time range input by the user in the local display time editing area, and to intercept a local test curve graph corresponding to the time range from the test curve graph;

[0170] The display unit is specifically used to display a local test curve graph in the local image display area.

[0171] In an exemplary embodiment, the above-mentioned display module also includes: a labeling unit, which is specifically used to label a target test curve among multiple test curves in the test curve diagram with a preset label; the target test curve indicates that the virtual battery has the latest lithium deposition time when the potential is the first value.

[0172] Each module in the above-mentioned battery lithium deposition test device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0173] In an exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be shown in FIG1. ​​The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store battery data of a virtual battery. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a test method for lithium deposition of a battery is implemented.

[0174] Those skilled in the art will understand that the structure shown in FIG. 1 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0175] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0176] In response to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery; the battery parameters include copper foil information of the virtual battery;

[0177] The lithium plating test results corresponding to each virtual battery are displayed in the test result display area of ​​the battery simulation display interface.

[0178] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0179] The basic structure information of each virtual battery is input in the first input area in response to the user, and the copper foil information of each virtual battery is input in the second input area in response to the user.

[0180] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0181] According to the basic structure information of each virtual battery and the copper foil information of each virtual battery, a simulation model corresponding to each virtual battery is constructed; the blank ratio of the copper foil structure included in the simulation models of different virtual batteries is different;

[0182] The simulation model corresponding to each virtual battery is displayed in the model display area.

[0183] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0184] Displaying the simulation model corresponding to each virtual battery in the graphic display area;

[0185] In response to the user triggering the lithium deposition display control in the model display area, the lithium deposition concentration and the lithium ion diffusion path are highlighted in the simulation model of each virtual battery.

[0186] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0187] In response to the time period input by the user in the test period editing area, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery in the time period.

[0188] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0189] Obtain basic structural information of each virtual battery and preset test time;

[0190] A lithium deposition test is performed according to the basic structure information, copper foil information and preset test time of each virtual battery to obtain a lithium deposition test result corresponding to each virtual battery.

[0191] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0192] Collecting statistics on the lithium deposition test results corresponding to each virtual battery and generating a test curve graph including the test results of multiple virtual batteries;

[0193] The test curve graph is displayed in the test result display area.

[0194] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0195] Responding to the time range input by the user in the local display time editing area, and intercepting the local test curve graph corresponding to the time range from the test curve graph;

[0196] A local test curve graph is displayed in the local image display area.

[0197] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0198] Among the multiple test curves in the test curve diagram, a target test curve is marked with a preset label; the target test curve indicates that the lithium deposition time of the virtual battery is the latest when the potential is the first value.

[0199] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0200] In response to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery; the battery parameters include copper foil information of the virtual battery;

[0201] The lithium plating test results corresponding to each virtual battery are displayed in the test result display area of ​​the battery simulation display interface.

[0202] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0203] The basic structure information of each virtual battery is input in the first input area in response to the user, and the copper foil information of each virtual battery is input in the second input area in response to the user.

[0204] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0205] According to the basic structure information of each virtual battery and the copper foil information of each virtual battery, a simulation model corresponding to each virtual battery is constructed; the blank ratio of the copper foil structure included in the simulation models of different virtual batteries is different;

[0206] The simulation model corresponding to each virtual battery is displayed in the model display area.

[0207] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0208] Displaying the simulation model corresponding to each virtual battery in the graphic display area;

[0209] In response to the user triggering the lithium deposition display control in the model display area, the lithium deposition concentration and the lithium ion diffusion path are highlighted in the simulation model of each virtual battery.

[0210] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0211] In response to the time period input by the user in the test period editing area, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery in the time period.

[0212] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0213] Obtain basic structural information of each virtual battery and preset test time;

[0214] A lithium deposition test is performed according to the basic structure information, copper foil information and preset test time of each virtual battery to obtain a lithium deposition test result corresponding to each virtual battery.

[0215] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0216] Collecting statistics on the lithium deposition test results corresponding to each virtual battery and generating a test curve graph including the test results of multiple virtual batteries;

[0217] The test curve graph is displayed in the test result display area.

[0218] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0219] Responding to the time range input by the user in the local display time editing area, and intercepting the local test curve graph corresponding to the time range from the test curve graph;

[0220] A local test curve graph is displayed in the local image display area.

[0221] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0222] Among the multiple test curves in the test curve diagram, a target test curve is marked with a preset label; the target test curve indicates that the lithium deposition time of the virtual battery is the latest when the potential is the first value.

[0223] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0224] In response to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery; the battery parameters include copper foil information of the virtual battery;

[0225] The lithium plating test results corresponding to each virtual battery are displayed in the test result display area of ​​the battery simulation display interface.

[0226] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0227] The basic structure information of each virtual battery is input in the first input area in response to the user, and the copper foil information of each virtual battery is input in the second input area in response to the user.

[0228] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0229] According to the basic structure information of each virtual battery and the copper foil information of each virtual battery, a simulation model corresponding to each virtual battery is constructed; the blank ratio of the copper foil structure included in the simulation models of different virtual batteries is different;

[0230] The simulation model corresponding to each virtual battery is displayed in the model display area.

[0231] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0232] Displaying the simulation model corresponding to each virtual battery in the graphic display area;

[0233] In response to the user triggering the lithium deposition display control in the model display area, the lithium deposition concentration and the lithium ion diffusion path are highlighted in the simulation model of each virtual battery.

[0234] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0235] In response to the time period input by the user in the test period editing area, a lithium deposition test is performed according to each battery parameter to obtain a lithium deposition test result corresponding to each virtual battery in the time period.

[0236] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0237] Obtain basic structural information of each virtual battery and preset test time;

[0238] A lithium deposition test is performed according to the basic structure information, copper foil information and preset test time of each virtual battery to obtain a lithium deposition test result corresponding to each virtual battery.

[0239] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0240] Collecting statistics on the lithium deposition test results corresponding to each virtual battery and generating a test curve graph including the test results of multiple virtual batteries;

[0241] The test curve graph is displayed in the test result display area.

[0242] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0243] Responding to the time range input by the user in the local display time editing area, and intercepting the local test curve graph corresponding to the time range from the test curve graph;

[0244] A local test curve graph is displayed in the local image display area.

[0245] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0246] Among the multiple test curves in the test curve diagram, a target test curve is marked with a preset label; the target test curve indicates that the lithium deposition time of the virtual battery is the latest when the potential is the first value.

[0247] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0248] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0249] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0250] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery lithium deposition testing method, characterized in that: The method comprises: In response to battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, a lithium deposition test is performed according to each of the battery parameters to obtain a lithium deposition test result corresponding to each of the virtual batteries; the battery parameters include copper foil information of the virtual batteries; The lithium plating test results corresponding to each of the virtual batteries are displayed in the test result display area of ​​the battery simulation display interface.

2. The method according to claim 1, characterized in that The battery parameters also include basic structure information, the parameter input area includes a first input area and a second input area, and the battery parameters of the multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface include: The method further comprises: responding to basic structural information of each of the virtual batteries input by the user in the first input area, and responding to copper foil information of each of the virtual batteries input by the user in the second input area.

3. The method according to claim 2, characterized in that The battery simulation display interface also includes a model display area, and the method further includes: According to the basic structure information of each virtual battery and the copper foil information of each virtual battery, a simulation model corresponding to each virtual battery is constructed; the blanking ratio of the copper foil structure included in the simulation models of different virtual batteries is different; The simulation model corresponding to each of the virtual batteries is displayed in the model display area.

4. The method according to claim 3, characterized in that The model display area includes a graphic display area and a lithium analysis display control, and the simulation model corresponding to each virtual battery is displayed in the model display area, including: Displaying the simulation model corresponding to each of the virtual batteries in the graphic display area; In response to the user triggering the lithium deposition display control in the model display area, the lithium deposition concentration and the lithium ion diffusion path are highlighted in the simulation model of each virtual battery.

5. The method according to any one of claims 1 to 4, characterized in that: The parameter input area also includes a test period editing area, which responds to the battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, performs lithium deposition test according to each of the battery parameters, and obtains the lithium deposition test results corresponding to each of the virtual batteries, including: In response to the time period input by the user in the test period editing area, a lithium deposition test is performed according to each of the battery parameters to obtain a lithium deposition test result corresponding to each of the virtual batteries in the time period.

6. The method according to claim 1, characterized in that The lithium deposition test is performed according to the battery parameters to obtain the lithium deposition test results corresponding to the virtual batteries, including: Obtaining basic structural information of each of the virtual batteries and preset test time; A lithium deposition test is performed according to the basic structure information of each virtual battery, the copper foil information and the preset test time to obtain a lithium deposition test result corresponding to each virtual battery.

7. The method according to claim 1 or 6, characterized in that: The displaying of the lithium deposition test results corresponding to each of the virtual batteries in the test result display area of ​​the battery simulation display interface includes: Collecting statistics on the lithium deposition test results corresponding to each of the virtual batteries to generate a test curve graph including the test results of multiple virtual batteries; The test curve graph is displayed in the test result display area.

8. The method according to claim 7, characterized in that The test result display area also includes a local image display area and a local display time editing area, and the method further includes: Responding to the time range input by the user in the local display time editing area, and intercepting a local test curve graph corresponding to the time range from the test curve graph; The local test curve graph is displayed in the local image display area.

9. The method according to claim 7, characterized in that: The method further comprises: Among the multiple test curves in the test curve diagram, a target test curve is marked with a preset label; the target test curve indicates that the virtual battery has the latest lithium deposition time when the potential is the first value.

10. A battery lithium deposition testing device, characterized in that: The device comprises: A response module, used to respond to battery parameters of multiple virtual batteries input by the user in the parameter input area of ​​the battery simulation display interface, perform lithium deposition test according to each of the battery parameters, and obtain lithium deposition test results corresponding to each of the virtual batteries; the battery parameters include copper foil information of the virtual battery; The display module is used to display the lithium deposition test results corresponding to each virtual battery in the test result display area of ​​the battery simulation display interface.

11. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 9 are implemented.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 9 are implemented.

13. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 9 are implemented.

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