Manufacturing method and device for AA lithium ion battery, apparatus and medium

Abstract

A manufacturing method for an AA lithium ion battery, comprising: preparing a battery cell on the basis of a battery cell preparation process; selecting a steel material for preparing a battery and stamping same to obtain an upper steel casing of a battery; acquiring a user demand and attribute parameters of spring contacts, and determining bending parameters of the spring contacts on the basis of the user demand and the attribute parameters of the spring contacts; on the basis of the bending parameters of the spring contacts, assembling a PCB and the upper steel casing of the battery, bending a negative electrode spring contact on a side surface of the PCB downwards such that the negative electrode spring contact is in elastic contact with the upper steel casing, and bending a positive electrode spring contact at the bottom of the PCB downwards such that the positive electrode spring contact is in elastic contact with the top of the battery cell, so as to obtain a complete buck-charging terminal; sleeving the complete buck-charging terminal on the battery cell to obtain a semi-finished battery product; and rolling and fixing the semi-finished battery product along a rolling recess of the battery cell, and sleeving an insulating film on the rolled and fixed semi-finished product, so as to obtain a finished battery product.

Description

Preparation method, device, equipment and medium of No. 5 lithium ion battery TECHNICAL FIELD

[0001] The present application relates to the technical field of battery preparation, in particular to a preparation method, device, equipment and medium of No. 5 lithium ion battery. BACKGROUND

[0002] At present, No. 5 lithium ion battery is widely used in portable electronic devices due to its high energy density, long cycle life and other advantages. However, there are still problems such as complex process, low yield rate and other problems in its preparation process, which restricts the further development of the industry. The existing preparation process of No. 5 battery mostly uses soft package winding core, welds the voltage reducing circuit, and then inserts it into the steel shell, which is difficult to mass produce, and special chargers are needed.

[0003] The existing technical solutions in the above have the following defects: the existing preparation method has defects in process control, production efficiency and product quality, which makes it difficult to guarantee the safety of the battery, so there is room for improvement.

[0004] SUMMARY

[0005] In order to improve the safety of lithium ion battery, the present application provides a preparation method, device, equipment and medium of No. 5 lithium ion battery.

[0006] The above invention purpose of the present application is realized by the following technical solutions:

[0007] A preparation method of No. 5 lithium ion battery, the preparation method of No. 5 lithium ion battery comprises:

[0008] Preparation of the battery cell based on the cell preparation process;

[0009] Selecting the steel material for preparing the battery, stamping the steel material to obtain the upper steel shell of the battery;

[0010] Obtain the user demand and the attribute parameters of the spring sheet, determine the bending parameters of the spring sheet according to the user demand and the attribute parameters of the spring sheet;

[0011] According to the bending parameters of the spring sheet, assemble the PCB board and the upper steel shell of the battery, bend the negative spring sheet on the side of the PCB board to the direction close to the cell, make the negative spring sheet and the upper steel shell elastically contact, bend the positive spring sheet at the bottom of the PCB board to the direction close to the cell, make the positive spring sheet and the top of the cell elastically contact, and obtain the complete voltage reducing-charging terminal;

[0012] The complete voltage-reducing and charging terminal is sleeved on the battery cell to obtain a semi-finished product of the battery, and an insulating gasket is arranged between the complete voltage-reducing and charging terminal and the battery cell.

[0013] The semi-finished product of the battery is fixed by rolling along the rolling groove of the battery cell, and an insulating film is sleeved outside the semi-finished product after being fixed by rolling to obtain a finished product of the battery.

[0014] By adopting the above technical solutions, the battery cell is prepared based on the battery cell preparation process. Through the standardized battery cell preparation process, the quality and performance of the battery cell are ensured to meet the design requirements, providing a basic component for subsequent battery assembly. Steel material for preparing the battery is selected, and the steel material is stamped to obtain the upper steel shell of the battery. Selecting appropriate steel material and stamping forms the upper steel shell of the battery, which provides mechanical protection and structural support for the battery cell and ensures that the battery cell is isolated from the external environment. The user demand and the attribute parameters of the spring sheet are obtained, the bending parameters of the spring sheet are determined according to the user demand and the attribute parameters of the spring sheet, the bending angle and shape of the spring sheet are accurately determined by analyzing the user demand and the physical characteristics of the spring sheet, so as to realize the expected electrical connection and mechanical performance. According to the bending parameters of the spring sheet, the PCB board and the upper steel shell of the battery are assembled, the negative spring sheet on the side of the PCB board is bent downward to make the negative spring sheet elastically contact the upper steel shell, and the positive spring sheet at the bottom of the PCB board is bent downward to make the positive spring sheet elastically contact the top of the battery cell to obtain a complete voltage-reducing and charging terminal. The spring sheet after bending is assembled with the PCB board and the upper steel shell to form a key part of electrical connection, which ensures that the positive and negative electrodes of the battery are correctly connected to the circuit on the PCB board, and through the accurate bending of the spring sheet, the elastic contact with the upper steel shell of the battery and the top of the battery cell is realized to form a stable electrical connection, and the voltage reduction and charging functions of the battery are constructed. The complete voltage-reducing and charging terminal is sleeved on the battery cell to obtain a semi-finished product of the battery, and the terminal assembly is sleeved on the battery cell to complete the assembly of the battery semi-finished product, laying a foundation for the final packaging and testing of the battery. The semi-finished product of the battery is fixed by rolling along the rolling groove of the battery cell, and an insulating film is sleeved outside the semi-finished product after being fixed by rolling to obtain a finished product of the battery. Through rolling fixation, the structural stability of the battery assembly and the reliability of the electrical connection are ensured, the insulating film provides additional electrical isolation and environmental protection, and the final packaging of the battery is completed to make it a finished product that can be used in practical applications.

[0015] In the present application, the No. 5 lithium ion battery is a 1.5V constant voltage lithium ion battery.

[0016] In a preferred example, the present application can be further configured as: the steel material for preparing the battery is selected, and the steel material is stamped to obtain the upper steel shell of the battery, including:

[0017] Obtaining attribute data of the battery, determining a steel stamping parameter according to the attribute data of the battery;

[0018] According to the steel stamping parameter, stamping the steel to obtain an upper steel shell of the battery.

[0019] By adopting the above technical solution, the attribute data of the battery is obtained, the steel stamping parameter is determined according to the attribute data of the battery, the battery attribute data is analyzed, the appropriate steel type and specification are selected, and the key parameters in the stamping process are determined, so as to ensure that the steel can adapt to the design requirements of the battery, and the feasibility and efficiency of the stamping forming are ensured. According to the steel stamping parameter, the steel is stamped to obtain the upper steel shell of the battery. The determined stamping parameter is used for actual stamping processing of the steel to form the upper steel shell of the battery, so as to realize the physical shape of the battery shell, provide mechanical protection for the battery cell, and ensure the structural integrity of the battery.

[0020] In a preferred example, the upper steel shell of the battery is provided with a first through hole and a second through hole. The first through hole is arranged at one end of the upper steel shell close to the battery cell, and the second through hole is arranged at one end of the upper steel shell away from the battery cell. The diameter of the first through hole is greater than the diameter of the second through hole, and the diameter of the first through hole is greater than 14 mm.

[0021] By adopting the above technical solution, the upper steel shell of the battery is provided with a first through hole and a second through hole. The first through hole is arranged at the bottom of the upper steel shell, and the second through hole is arranged at the top of the upper steel shell. The diameter of the first through hole is greater than the diameter of the second through hole, and the diameter of the first through hole is greater than 14 mm.

[0022] In a preferred example, the application can be further configured to: obtain user demand and attribute parameters of the spring sheet, and determine the bending parameter of the spring sheet according to the user demand and the attribute parameters of the spring sheet, including:

[0023] Input the user demand and the attribute parameters of the spring sheet into a pre-trained bending model for comparison and analysis to obtain an analysis result;

[0024] According to the analysis result, determine the bending parameter of the spring sheet, including the angle parameter and the contact surface parameter of the spring sheet.

[0025] By adopting the technical scheme, the user demand and the attribute parameter of the spring sheet are input into the pre-trained bending model for comparison and analysis to obtain an analysis result. By inputting the specific demand of the user and the physical attribute data of the spring sheet into a trained bending model, the prediction capability of the model can be used to analyze the performance of the spring sheet under different conditions. The comparison and analysis can provide preliminary feedback on whether the spring sheet design meets the user demand, thereby providing a basis for subsequent design adjustment. According to the analysis result, the angle parameter and the contact surface parameter of the spring sheet are determined to ensure that the spring sheet can achieve the expected performance in actual application.

[0026] In a preferred example, the application can be further configured as follows: the preparation method of the No. 5 lithium ion battery further comprises:

[0027] The attribute parameters and the corresponding bending degree data of the spring sheets of various materials are obtained, and the attribute parameters and the corresponding bending degree data of the spring sheets of various materials are preprocessed to obtain a training set.

[0028] A bending model is constructed based on a decision tree algorithm, the training set is used for forward propagation and backward propagation training of the bending model, and a genetic algorithm is used to optimize the bending model after the forward propagation and backward propagation training to obtain the pre-trained bending model.

[0029] By adopting the technical scheme, the attribute parameters and the corresponding bending degree data of the spring sheets of various materials are obtained, and the attribute parameters and the corresponding bending degree data of the spring sheets of various materials are preprocessed to obtain a training set, thereby ensuring the quality of the training set. A bending model is constructed based on a decision tree algorithm, the training set is used for forward propagation and backward propagation training of the bending model, and a genetic algorithm is used to optimize the bending model after the forward propagation and backward propagation training to obtain a pre-trained bending model, thereby improving the efficiency and accuracy of the spring sheet bending process.

[0030] In a preferred example, the application can be further configured as follows: according to the analysis result, the bending parameters of the spring sheet are determined, and the bending parameters of the spring sheet include the angle parameter and the contact surface parameter of the spring sheet.

[0031] According to the user demand and the attribute parameter of the spring sheet, the bending angle and the contact surface parameter are determined in the analysis result.

[0032] The bending angle and the contact surface parameter are simulated and tested to obtain a simulation test result.

[0033] According to the simulation test result, the bending angle and the contact surface parameter of the spring sheet are determined.

[0034] By adopting the technical scheme, the bending angle and the contact surface parameter are determined in the analysis result according to the user demand and the attribute parameter of the spring sheet; the bending angle and the contact surface parameter are simulated and tested to obtain a simulation test result; and the bending angle and the contact surface parameter of the spring sheet are determined according to the simulation test result, thereby improving the reliability and quality of the battery.

[0035] The second application purpose is achieved by the following technical scheme.

[0036] The preparation device of the No. 5 lithium ion battery comprises:

[0037] The preparation device of the No. 5 lithium ion battery comprises:

[0038] The preparation device of the No. 5 lithium ion battery comprises:

[0039] The preparation device of the No. 5 lithium ion battery comprises:

[0040] The preparation device of the No. 5 lithium ion battery comprises:

[0041] The preparation device of the No. 5 lithium ion battery comprises:

[0042] The preparation device of the No. 5 lithium ion battery comprises:

[0043] By adopting the technical scheme, the battery cell is prepared based on the battery cell preparation process, the standardized battery cell preparation process ensures that the quality and performance of the battery cell meet the design requirements, and provides a basic component for subsequent battery assembly; the steel material for preparing the battery is selected, the steel material is stamped to obtain the upper steel shell of the battery, the appropriate steel material is selected and stamped to form the upper steel shell of the battery, which provides mechanical protection and structural support for the battery cell and ensures that the battery cell is isolated from the external environment; the user demand and the attribute parameters of the spring sheet are obtained, the bending parameters of the spring sheet are determined according to the user demand and the attribute parameters of the spring sheet, the bending angle and shape of the spring sheet are accurately determined by analyzing the user demand and the physical characteristics of the spring sheet, so as to realize the expected electrical connection and mechanical performance; according to the bending parameters of the spring sheet, the PCB board and the upper steel shell of the battery are assembled, the negative spring sheet on the side of the PCB board is bent downward to make the negative spring sheet elastically contact the upper steel shell, the positive spring sheet at the bottom of the PCB board is bent downward to make the positive spring sheet elastically contact the top of the battery cell, and a complete step-down-charging terminal is obtained, the bent spring sheet is assembled with the PCB board and the upper steel shell to form a key part of electrical connection, which ensures that the positive and negative electrodes of the battery are correctly connected to the circuit on the PCB board, and the accurate bending of the spring sheet realizes the elastic contact with the upper steel shell of the battery and the top of the battery cell to form a stable electrical connection, and the step-down and charging functions of the battery are constructed; the complete step-down-charging terminal is sleeved on the battery cell to obtain a semi-finished product of the battery, the terminal assembly is sleeved on the battery cell to complete the assembly of the battery semi-finished product, and a foundation is laid for the final packaging and testing of the battery; the semi-finished product of the battery is fixed along the rolling groove of the battery cell, and an insulating film is sleeved outside the semi-finished product after rolling fixation to obtain a finished product of the battery, the rolling fixation ensures the structural stability of the battery assembly and the reliability of the electrical connection, the sleeving of the insulating film provides additional electrical isolation and environmental protection, and the final packaging of the battery is completed to make it a finished product that can be used in practical applications.

[0044] The fourth purpose of the present application is achieved through the following technical scheme:

[0045] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the above-mentioned preparation method of a No. 5 lithium ion battery when executing the computer program.

[0046] The fourth purpose of the present application is achieved through the following technical scheme:

[0047] A computer-readable storage medium stores a computer program, and the computer program implements the steps of the above-mentioned preparation method of a No. 5 lithium ion battery when executed by a processor.

[0048] In summary, the present application includes at least one of the following beneficial technical effects:

[0049] 1. The battery cell is prepared based on the preparation process of the battery cell. Through the standardized battery cell preparation process, the quality and performance of the battery cell meet the design requirements, providing the foundation components for the subsequent battery assembly; select the steel material for preparing the battery, stamp the steel material to obtain the upper steel shell of the battery, select the appropriate steel material and stamp to form the upper steel shell of the battery, which provides mechanical protection and structural support for the battery cell, and at the same time ensures that the battery cell is isolated from the external environment; obtain the user demand and the attribute parameters of the spring sheet, determine the bending parameters of the spring sheet according to the user demand and the attribute parameters of the spring sheet, accurately determine the bending angle and shape of the spring sheet by analyzing the user demand and the physical characteristics of the spring sheet, so as to realize the expected electrical connection and mechanical performance;

[0050] 2. According to the bending parameters of the spring sheet, assemble the PCB board and the upper steel shell of the battery, bend the negative spring sheet on the side of the PCB board downward to make the negative spring sheet elastically contact with the upper steel shell, bend the positive spring sheet at the bottom of the PCB board downward to make the positive spring sheet elastically contact with the top of the battery cell, obtain the complete step-down-charging terminal, assemble the bent spring sheet with the PCB board and the upper steel shell to form the key part of electrical connection, ensure that the positive and negative electrodes of the battery are correctly connected with the circuit on the PCB board, and realize the elastic contact with the top of the battery upper steel shell and the battery cell by accurately bending the spring sheet, form a stable electrical connection, and at the same time build the step-down and charging functions of the battery; the complete step-down-charging terminal is sleeved on the battery cell to obtain the semi-finished product of the battery, the terminal assembly is sleeved on the battery cell to complete the assembly of the semi-finished product of the battery, and lay the foundation for the final packaging and testing of the battery; the semi-finished product of the battery is fixed along the rolling groove of the battery cell, and an insulating film is sleeved outside the semi-finished product after rolling and fixing to obtain the finished product of the battery. The rolling and fixing ensure the structural stability of the battery assembly and the reliability of the electrical connection, the sleeving of the insulating film provides additional electrical isolation and environmental protection, and the final packaging of the battery is completed to make it a finished product that can be used in practical applications. BRIEF DESCRIPTION OF DRAWINGS

[0051] FIG. 1 is a schematic diagram of the overall structure of a No. 5 lithium ion battery according to the present application;

[0052] FIG. 2 is a flowchart of a preparation method of a No. 5 lithium ion battery according to an embodiment of the present application;

[0053] FIG. 3 is an implementation flowchart of step S20 in the preparation method of a No. 5 lithium ion battery according to an embodiment of the present application;

[0054] FIG. 4 is an implementation flowchart of step S30 in the preparation method of a No. 5 lithium ion battery according to an embodiment of the present application;

[0055] Fig. 5 is a flow chart of step S31 in the method for manufacturing a No. 5 lithium ion battery according to an embodiment of the present application;

[0056] Fig. 6 is a flow chart of step S32 in the method for manufacturing a No. 5 lithium ion battery according to an embodiment of the present application;

[0057] Fig. 7 is a schematic block diagram of a manufacturing device for a No. 5 lithium ion battery according to an embodiment of the present application;

[0058] Fig. 8 is a schematic diagram of the internal structure of a computer device according to an embodiment of the present application.

[0059] Reference signs: 1, upper steel shell; 2, PCB board; 3, insulating gasket; 4, battery cell; 5, insulating film; 6, positive spring sheet; 7, negative spring sheet. DETAILED DESCRIPTION

[0060] The present application will be further described in detail below with reference to the accompanying drawings.

[0061] In an embodiment, as shown in Fig. 2, the present application discloses a method for manufacturing a No. 5 lithium ion battery, which specifically comprises the following steps:

[0062] S10: preparing a battery cell based on a battery cell preparation process.

[0063] Specifically, first, according to the requirements of battery design, the positive material, negative material, binder, conductive agent and solvent are mixed in a certain proportion, the prepared positive slurry is uniformly coated on the aluminum foil, and the negative slurry is coated on the copper foil. During the coating process, the coating speed and thickness need to be controlled to ensure the uniformity and consistency of the electrode sheet. The coated electrode sheet needs to be dried to remove the solvent and leave the active material and binder uniformly distributed. The dried electrode sheet is compacted by a roller press, cut into the required size after rolling, and then cut into the required shape of the battery by a die-cutting machine. The cut and die-cut positive and negative electrode sheets and the separator are alternately placed and then wound into a roll or stacked into a layer to form the preliminary structure of the battery cell.

[0064] S20: selecting steel material for preparing the battery, and punching the steel material to obtain the upper steel shell of the battery.

[0065] Specifically, in order to improve the safety of the battery, a suitable steel material needs to be selected as the material of the battery shell. After selecting the steel material, it needs to be cut into a size suitable for punching processing, which may include cutting, edge trimming and other pretreatment work to ensure that the size and shape of the steel material are suitable for the subsequent punching process. After punching, the obtained is the upper steel shell of the battery, i.e. the upper cover part of the battery. The upper steel shell is usually designed with threads or other connection mechanisms to tightly fit with the lower shell of the battery and ensure that the electrolyte does not leak.

[0066] S30: Obtain the user's requirements and the attribute parameters of the spring sheet, and determine the bending parameters of the spring sheet according to the user's requirements and the attribute parameters of the spring sheet.

[0067] Specifically, first, communication with the user is needed to understand their specific requirements for the product, which may include the product's functionality, performance, size, shape, use environment, durability, etc. According to the user's requirements and the attribute parameters of the spring sheet, the engineer needs to determine the bending design of the spring sheet to determine the degree of bending of the spring sheet, making the overall structure of the battery design more secure.

[0068] S40: According to the bending parameters of the spring sheet, assemble the PCB board and the upper steel shell of the battery, bend the negative spring sheet on the side of the PCB board towards the direction close to the battery cell to make the negative spring sheet elastically contact the upper steel shell, bend the positive spring sheet at the bottom of the PCB board towards the direction close to the battery cell to make the positive spring sheet elastically contact the top of the battery cell, and obtain a complete step-down-charging terminal.

[0069] Specifically, before assembly, the bending parameters of the spring sheet need to be determined, which include the bending angle, bending radius, bending shape, etc. of the spring sheet, which will affect the contact effect and electrical connection reliability of the spring sheet with the PCB board and other components. Place the PCB board in the appropriate position, then align the upper steel shell of the battery with the PCB board and fix it with glue, bend the negative spring sheet on the side of the PCB board towards the direction close to the battery cell to make the negative spring sheet elastically contact the upper steel shell, bend the positive spring sheet at the bottom of the PCB board towards the direction close to the battery cell to make the positive spring sheet elastically contact the top of the battery cell. Through the above steps, the negative and positive spring sheets are elastically contacted with the upper steel shell of the battery and the top of the battery cell respectively, forming a complete electrical connection path, which is the step-down-charging terminal, because it allows current to flow from the battery cell to the PCB board, thereby realizing voltage regulation and battery charging.

[0070] S50: The complete step-down-charging terminal is sleeved on the battery cell to obtain a semi-finished product of the battery, and an insulating gasket is provided between the complete step-down-charging terminal and the battery cell.

[0071] Specifically, the complete step-down-charging terminal is sleeved on the battery cell, and the spring sheet part of the terminal is aligned with the positive and negative electrode contact areas of the battery cell. The bent part of the negative spring sheet should be in elastic contact with the negative electrode area of the battery cell, i.e. the upper steel shell of the battery, and the bent part of the positive spring sheet should be in elastic contact with the top of the battery cell. After sleeving the step-down-charging terminal, it is necessary to check whether the spring sheet is in good contact with the battery cell to ensure that there is no risk of poor contact or short circuit, and finally obtain a semi-finished product of the battery.

[0072] S60: roll-press the semi-finished product of the battery along the rolling groove of the battery cell, and wrap an insulating film outside the semi-finished product after roll-pressing, to obtain a finished product of the battery.

[0073] Specifically, some specific designs on the cell shell, such as grooves or rolled edges, are used to increase the structural stability of the battery assembly. The semi-finished product of the battery is roll-pressed along the rolling groove of the battery cell, and the battery semi-finished product is compacted along the rolling groove using a pressure machine to ensure the close fit between the battery cell and the shell or the terminal, preventing displacement or loosening during the use of the battery. An insulating film is wrapped outside the semi-finished product after roll-pressing to obtain a finished product of the battery.

[0074] By adopting the above technical solutions, the battery cell is prepared based on the battery cell preparation process. Through the standardized battery cell preparation process, the quality and performance of the battery cell meet the design requirements, providing a basic component for subsequent battery assembly. Steel material for preparing the battery is selected, and the steel material is stamped to obtain an upper steel shell of the battery. Selecting appropriate steel material and stamping forms the upper steel shell of the battery, which provides mechanical protection and structural support for the battery cell, and ensures that the battery cell is isolated from the external environment. The user requirements and attribute parameters of the spring sheet are obtained, and the bending parameters of the spring sheet are determined according to the user requirements and the attribute parameters of the spring sheet. By analyzing the user requirements and the physical characteristics of the spring sheet, the bending angle and shape of the spring sheet are accurately determined to achieve the expected electrical connection and mechanical performance. According to the bending parameters of the spring sheet, the PCB board and the upper steel shell of the battery are assembled. The negative spring sheet on the side of the PCB board is bent downward to make the negative spring sheet elastically contact the upper steel shell. The positive spring sheet at the bottom of the PCB board is bent downward to make the positive spring sheet elastically contact the top of the battery cell to obtain a complete step-down-charging terminal. The bent spring sheet, the PCB board and the upper steel shell are assembled to form a key part of electrical connection, ensuring that the positive and negative electrodes of the battery are correctly connected to the circuit on the PCB board. By accurately bending the spring sheet, the elastic contact with the upper steel shell of the battery and the top of the battery cell is achieved to form a stable electrical connection, and the step-down and charging functions of the battery are constructed. The complete step-down-charging terminal is wrapped on the battery cell to obtain a semi-finished product of the battery. The terminal assembly is wrapped on the battery cell to complete the assembly of the battery semi-finished product, laying a foundation for the final packaging and testing of the battery. The semi-finished product of the battery is roll-pressed along the rolling groove of the battery cell, and an insulating film is wrapped outside the semi-finished product after roll-pressing to obtain a finished product of the battery. Roll-pressing ensures the structural stability of the battery assembly and the reliability of the electrical connection. Wrapping the insulating film provides additional electrical isolation and environmental protection, and completes the final packaging of the battery to make it a finished product that can be used in practical applications.

[0075] In an embodiment, as shown in FIG. 3, in step S20, i.e., selecting steel material for preparing the battery, stamping the steel material to obtain an upper steel shell of the battery, specifically comprising:

[0076] S21: Obtain attribute data of the battery, and determine steel stamping parameters according to the attribute data of the battery.

[0077] Specifically, before designing and manufacturing the battery, the attribute data of the battery need to be understood first, which can include the size, shape, capacity, voltage, chemical composition, expected load, working temperature range, etc. of the battery. According to the attribute data of the battery, engineers can determine the specific parameters required for steel stamping, including the thickness, hardness, tensile strength, etc. of the steel, as well as the force, speed, die design, etc. required during the stamping process. For example, if the battery needs to withstand high internal pressure, a thicker or higher strength steel may need to be selected, and the stamping force may need to be adjusted accordingly.

[0078] S22: Stamp the steel according to the steel stamping parameters to obtain the upper steel shell of the battery.

[0079] Specifically, after determining the stamping parameters, the next step is to use a stamping machine to process the steel. During the stamping process, the steel is placed in a die, and then a power machine is used to apply force to make the steel deform and form the required shape. After stamping, the obtained product is the upper steel shell of the battery.

[0080] In an embodiment, as shown in FIG. 4, in step S30, user requirements and attribute parameters of the spring sheet are obtained, and bending parameters of the spring sheet are determined according to the user requirements and the attribute parameters of the spring sheet, specifically including:

[0081] S31: Input the user requirements and the attribute parameters of the spring sheet into a pre-trained bending model for comparison and analysis to obtain an analysis result.

[0082] Specifically, first, the specific requirements of the user for the spring sheet need to be collected and understood, and the user requirements and the attribute data of the spring sheet are input into the analysis model. The model compares and analyzes the user requirements with the attributes of the spring sheet to determine whether the user's requirements are met. After the analysis is completed, the model will provide the results, which include performance evaluation of the spring sheet under different bending conditions, potential problem points, improvement suggestions, etc.

[0083] S32: Determine the bending parameters of the spring sheet according to the analysis result, which include the angle parameter and the contact surface parameter of the spring sheet.

[0084] Specifically, the angle parameter is a key factor that determines the tightness and elasticity of the spring sheet and the contact surface. Therefore, according to the analysis result, the specific angle to which the spring sheet needs to be bent can be determined. If the analysis result shows that the current design does not meet the user's requirements, the design of the spring sheet may need to be adjusted, such as changing the material, size or bending shape, and then re-analyzing until a solution that meets all requirements is found.

[0085] In an embodiment, as shown in FIG. 5, in step S31, the user requirements and the attribute parameters of the spring sheet are input into the pre-trained bending model for comparison and analysis to obtain an analysis result. The pre-trained bending model specifically includes:

[0086] S301: Obtain the attribute parameters of the spring sheet of each material and the corresponding bending degree data, and pre-process the attribute parameters of the spring sheet of each material and the corresponding bending degree data to obtain a training set.

[0087] Specifically, first, the attribute parameters of spring sheets of different materials need to be collected, including the material type, size, elastic coefficient, tensile strength, yield strength, etc. of the spring sheet. At the same time, the bending degree data of each material spring sheet under different bending conditions is collected, including the bending angle, bending radius, etc. The collected data is pre-processed to facilitate subsequent model training. The pre-processed data is organized into a format suitable for model training to form a training set.

[0088] S302: Construct a bending model based on a decision tree algorithm, use the training set to train the bending model by forward propagation and back propagation, and use a genetic algorithm to optimize the bending model after forward propagation and back propagation training to obtain a pre-trained bending model.

[0089] Specifically, a bending model is constructed based on a decision tree algorithm, the training set is used to train the bending model by forward propagation and back propagation, and a genetic algorithm is used to optimize the bending model after forward propagation and back propagation training to obtain a pre-trained bending model. After forward propagation and back propagation training and optimization by the genetic algorithm, a pre-trained bending model is finally obtained, which can predict the bending behavior of the spring sheet under specific conditions according to the attribute parameters of the spring sheet.

[0090] In an embodiment, as shown in FIG. 6, in step S32, the angle parameters and contact surface parameters of the spring sheet are determined according to the analysis result, specifically including:

[0091] S321: Determine the bending angle and contact surface parameters in the analysis result according to the user requirements and the attribute parameters of the spring sheet.

[0092] Specifically, the bending angle and contact surface parameters of the spring sheet are determined by analysis using the user requirements and the attribute parameters of the spring sheet. The bending angle determines the degree of deformation of the spring sheet, and the contact surface parameters affect the contact effect of the spring sheet with other components.

[0093] S322: Perform simulation testing on the bending angle and contact surface parameters to obtain the results of the simulation testing.

[0094] Specifically, the initially determined bending angle and contact surface parameters are subjected to computer-aided simulation testing. The simulation testing can predict the performance of the spring sheet in actual application without actually manufacturing the spring sheet. After the simulation testing is completed, the simulation result data is analyzed to evaluate whether the bending performance of the spring sheet meets the design requirements and user needs, including checking whether the maximum stress is within the bearing range of the material and whether the deformation of the spring sheet meets the expectation.

[0095] S323: Determine the bending angle and contact surface parameters of the spring sheet according to the result of the simulation testing.

[0096] Specifically, if the simulation testing result shows that the current bending angle or contact surface parameters do not meet the requirements, the parameters need to be adjusted. After the parameters are adjusted, the simulation testing is performed again to verify the performance of the spring sheet under the new parameters. Through a series of simulation testing and parameter adjustment, a set of bending angle and contact surface parameters that meet the user needs and design standards are finally determined.

[0097] It should be understood that the size of the serial number of each step in the above embodiments does not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0098] In an embodiment, a preparation device of a No. 5 lithium ion battery is provided, which corresponds to the preparation method of a No. 5 lithium ion battery in the above embodiment. As shown in FIG. 7, the preparation device of a No. 5 lithium ion battery includes a cell preparation module, a punching module, a bending determination module, an assembly module, a sleeving module, and a rolling module. The functions of each module are described in detail as follows:

[0099] The cell preparation module is used to prepare the cell of the battery based on a cell preparation process;

[0100] The punching module is used to select a steel material for preparing the battery, and punch the steel material to obtain an upper steel shell of the battery;

[0101] The bending determination module is used to obtain user needs and attribute parameters of the spring sheet, and determine bending parameters of the spring sheet according to the user needs and the attribute parameters of the spring sheet;

[0102] The assembly module is used to assemble the PCB and the upper steel shell of the battery according to the bending parameters of the spring sheet, bend the negative spring sheet on the side of the PCB towards the direction close to the cell to make the negative spring sheet elastically contact the upper steel shell, bend the positive spring sheet at the bottom of the PCB towards the direction close to the cell to make the positive spring sheet elastically contact the top of the cell, and obtain a complete step-down-charging terminal;

[0103] The sleeve module is configured to sleeve a complete voltage reduction and charging terminal on the battery cell to obtain a semi-finished product of the battery, and an insulating gasket is arranged between the complete voltage reduction and charging terminal and the battery cell.

[0104] The rolling module is configured to roll and fix the semi-finished product of the battery along the rolling groove of the battery cell, and sleeve an insulating film outside the semi-finished product after the rolling and fixing to obtain a finished product of the battery.

[0105] Optionally, the stamping module comprises:

[0106] The attribute acquisition submodule is configured to acquire attribute data of the battery, and determine a steel stamping parameter according to the attribute data of the battery.

[0107] The steel stamping submodule is configured to stamp the steel according to the steel stamping parameter to obtain an upper steel shell of the battery.

[0108] Optionally, the determination bending module comprises:

[0109] The analysis submodule is configured to input the user demand and the attribute parameter of the spring sheet into a pre-trained bending model for comparison analysis to obtain an analysis result.

[0110] The parameter determination submodule is configured to determine a bending parameter of the spring sheet according to the analysis result, and the bending parameter of the spring sheet comprises an angle parameter and a contact surface parameter of the spring sheet.

[0111] Optionally, the analysis submodule comprises:

[0112] The training set obtaining unit is configured to acquire the attribute parameter of the spring sheet of each material and the corresponding bending degree data, pre-process the attribute parameter of the spring sheet of each material and the corresponding bending degree data, and obtain a training set.

[0113] The training unit is configured to construct a bending model based on a decision tree algorithm, perform forward propagation and backward propagation training on the bending model using the training set, and optimize the bending model after the forward propagation and the backward propagation training using a genetic algorithm to obtain the pre-trained bending model.

[0114] Optionally, the parameter determination submodule comprises:

[0115] The attribute parameter determination unit is configured to determine a bending angle and a contact surface parameter in the analysis result according to the user demand and the attribute parameter of the spring sheet.

[0116] The simulation test unit is configured to perform simulation test on the bending angle and the contact surface parameter to obtain a simulation test result.

[0117] The contact surface parameter determination unit is configured to determine the bending angle and the contact surface parameter of the spring sheet according to the simulation test result.

[0118] The specific limitations of the preparation device of the No. 5 lithium ion battery can be referred to the limitations of the preparation method of the No. 5 lithium ion battery as described above, which will not be repeated here. Each module in the preparation device of the No. 5 lithium ion battery described above can be realized by software, hardware and combinations thereof, in whole or in part. Each module described above can be embedded in the processor in the computer device in hardware form or independent of the processor in the computer device, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to each module.

[0119] In one embodiment, a computer device, which can be a server, is provided, and an internal structure diagram thereof can be as shown in FIG. 8. The computer device includes a processor, a memory, a network interface and a database connected by a system bus. The processor of the computer device is configured 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 operating system and the computer program in the non-volatile storage medium to run. The network interface of the computer device is configured to communicate with an external terminal through a network connection. The computer program is executed by the processor to implement a preparation method of a No. 5 lithium ion battery.

[0120] In one embodiment, a computer device is provided, including a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the following steps when executing the computer program:

[0121] Preparation of the battery cell based on the cell preparation process;

[0122] Selecting a steel material for preparing the battery, and stamping the steel material to obtain an upper steel shell of the battery;

[0123] Obtaining user requirements and attribute parameters of the spring sheet, and determining bending parameters of the spring sheet according to the user requirements and the attribute parameters of the spring sheet;

[0124] According to the bending parameters of the spring sheet, assembling the PCB and the upper steel shell of the battery, bending the negative spring sheet on the side of the PCB towards the direction close to the cell to make the negative spring sheet elastically contact the upper steel shell, and bending the positive spring sheet at the bottom of the PCB towards the direction close to the cell to make the positive spring sheet elastically contact the top of the cell, to obtain a complete step-down-charging terminal;

[0125] Sleeving the complete step-down-charging terminal on the cell to obtain a semi-finished product of the battery, and an insulating gasket is arranged between the complete step-down-charging terminal and the cell;

[0126] The semi-finished product of the battery is fixed by rolling along the rolling groove of the battery cell, and an insulating film is sleeved outside the semi-finished product after being fixed by rolling, so that a finished product of the battery is obtained.

[0127] In one embodiment, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to implement the following steps:

[0128] The battery cell is prepared based on a battery cell preparation process;

[0129] The steel material for preparing the battery is selected, and the steel material is stamped to obtain an upper steel shell of the battery;

[0130] Obtain the user demand and the attribute parameters of the spring sheet, and determine the bending parameters of the spring sheet according to the user demand and the attribute parameters of the spring sheet;

[0131] According to the bending parameters of the spring sheet, the PCB board and the upper steel shell of the battery are assembled, the negative spring sheet on the side of the PCB board is bent towards the direction close to the battery cell, so that the negative spring sheet is in elastic contact with the upper steel shell, the positive spring sheet at the bottom of the PCB board is bent towards the direction close to the battery cell, so that the positive spring sheet is in elastic contact with the top of the battery cell, and a complete voltage reduction-charging terminal is obtained;

[0132] The complete voltage reduction-charging terminal is sleeved on the battery cell to obtain a semi-finished product of the battery, and an insulating gasket is arranged between the complete voltage reduction-charging terminal and the battery cell;

[0133] The semi-finished product of the battery is fixed by rolling along the rolling groove of the battery cell, and an insulating film is sleeved outside the semi-finished product after being fixed by rolling, so that a finished product of the battery is obtained.

[0134] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. Any reference to memory, storage, database or other medium used in the embodiments provided by the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0135] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of functional units and modules is exemplified. In actual application, the above-mentioned functions can be completed by different functional units or modules according to needs, i.e. the internal structure of the device is divided into different functional units or modules to complete all or part of the above-mentioned functions.

[0136] The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for producing a lithium-ion battery of size 5, characterized in that, The preparation method of the No. 5 lithium ion battery comprises the following steps: A battery cell is prepared based on a battery cell preparation process; Steel material for preparing the battery is selected, and the steel material is punched to obtain an upper steel shell of the battery; User requirements and attribute parameters of the spring sheet are obtained, and the bending parameters of the spring sheet are determined according to the user requirements and the attribute parameters of the spring sheet; According to the bending parameters of the spring sheet, the PCB board and the upper steel shell of the battery are assembled, the negative spring sheet on the side of the PCB board is bent towards the direction close to the battery cell, the negative spring sheet is in elastic contact with the upper steel shell, the positive spring sheet at the bottom of the PCB board is bent towards the direction close to the battery cell, and the positive spring sheet is in elastic contact with the top of the battery cell to obtain a complete step-down-charging terminal; The complete step-down-charging terminal is sleeved on the battery cell, and an insulating gasket is arranged between the complete step-down-charging terminal and the battery cell to obtain a semi-finished product of the battery; The semi-finished product of the battery is fixed by rolling along the rolling groove of the battery cell, and an insulating film is sleeved outside the semi-finished product after rolling to obtain a finished product of the battery.

2. The method of claim 1, wherein the lithium-ion battery is a 5 Ah lithium-ion battery. The steel material for preparing the battery is selected, and the steel material is punched to obtain the upper steel shell of the battery, which comprises the following steps: Attribute data of the battery is obtained, and steel punching parameters are determined according to the attribute data of the battery; The steel material is punched according to the steel punching parameters to obtain the upper steel shell of the battery.

3. The method of claim 2, wherein the lithium-ion battery is a 5 Ah lithium-ion battery. The upper steel shell of the battery is provided with a first through hole and a second through hole, the first through hole is arranged at one end of the upper steel shell close to the battery cell, the second through hole is arranged at one end of the upper steel shell away from the battery cell, and the diameter of the first through hole is greater than the diameter of the second through hole, wherein the diameter of the first through hole is greater than 14 mm.

4. The method of claim 1, wherein the lithium-ion battery is a 5# battery. The user requirements and the attribute parameters of the spring sheet are input into a pre-trained bending model for comparison and analysis to obtain an analysis result; According to the analysis result, the bending parameters of the spring sheet are determined, and the bending parameters of the spring sheet include the angle parameters and the contact surface parameters of the spring sheet. The preparation method of the No. 5 lithium ion battery further comprises the following steps:

5. The method of claim 4, wherein the lithium-ion battery is a 5# battery. Attribute parameters and corresponding bending degree data of spring sheets of various materials are obtained, and the attribute parameters and the corresponding bending degree data of the spring sheets of various materials are preprocessed to obtain a training set; A bending model is constructed based on a decision tree algorithm, the training set is used for forward propagation and backward propagation training of the bending model, and a genetic algorithm is used for optimization of the bending model after the forward propagation and the backward propagation training to obtain the pre-trained bending model. According to the analysis result, the bending parameters of the spring sheet are determined, and the bending parameters of the spring sheet include the angle parameters and the contact surface parameters of the spring sheet.

6. The method of claim 4, wherein the lithium-ion battery is a 5# battery. ​ ​ The bending angle and the contact surface parameter are simulated to obtain a simulation result; The bending angle and the contact surface parameter of the spring sheet are determined according to the simulation result.

7. An apparatus for manufacturing a lithium-ion battery of size 5, characterized in that, The preparation device of the No. 5 lithium ion battery comprises: A battery cell module is configured to prepare a battery cell of a battery based on a battery cell preparation process; A stamping module is configured to select steel material for preparing the battery, and stamp the steel material to obtain an upper steel shell of the battery; A determination module is configured to obtain user requirements and attribute parameters of the spring sheet, and determine bending parameters of the spring sheet according to the user requirements and the attribute parameters of the spring sheet; An assembly module is configured to assemble a PCB board and the upper steel shell of the battery according to the bending parameters of the spring sheet, bend negative spring sheets on a side of the PCB board downward to make the negative spring sheets elastically contact the upper steel shell, bend positive spring sheets at a bottom of the PCB board downward to make the positive spring sheets elastically contact a top of the battery cell, and obtain a complete step-down-charging terminal; A sleeving module is configured to sleeve the complete step-down-charging terminal on the battery cell to obtain a semi-finished product of the battery, and an insulating gasket is arranged between the complete step-down-charging terminal and the battery cell; A rolling module is configured to roll and fix the semi-finished product of the battery along a rolling groove of the battery cell, and sleeve an insulating film outside the semi-finished product after the rolling and fixing to obtain a finished product of the battery.

8. The apparatus for manufacturing No. 5 lithium-ion batteries according to claim 7, wherein The stamping module comprises: A determination stamping parameter submodule is configured to obtain attribute data of the battery, and determine steel stamping parameters according to the attribute data of the battery; A steel shell stamping submodule is configured to stamp the steel material according to the steel stamping parameters to obtain the upper steel shell of the battery.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the steps of the preparation method of the No. 5 lithium ion battery according to any one of claims 1 to 6.

10. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 9. The computer program is executed by the processor to implement the steps of the preparation method of the No. 5 lithium ion battery according to any one of claims 1 to 6.

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