Preparation method, device, equipment and medium of a No. 5 lithium-ion battery

Abstract

The present application relates to a preparation method, device, equipment and medium for a No. 5 lithium-ion battery, including preparing a battery cell based on a cell preparation process; selecting steel for preparing the battery and performing stamping to obtain an upper steel shell of the battery; obtaining and determining the bending parameters of a spring piece according to user requirements and the attribute parameters of the spring piece; assembling a PCB board and the upper steel shell of the battery according to the bending parameters of the spring piece, bending the negative electrode spring piece on the side of the PCB board downward so that the negative electrode spring piece is in elastic contact with the upper steel shell, and bending the positive electrode spring piece at the bottom of the PCB board downward so that the positive electrode spring piece is in elastic contact with the top of the cell to obtain a complete step-down charging terminal; sleeving the complete step-down charging terminal on the cell to obtain a semi-finished product of the battery; rolling and fixing the semi-finished product of the battery along the rolling groove of the cell, and sleeving an insulating film outside the semi-finished product after rolling and fixing to obtain a finished product of the battery. The present application has the effect of improving the safety of lithium-ion batteries.

Description

Technical Field

[0001] The present application relates to the technical field of battery preparation, and particularly relates to a preparation method, device, equipment and medium for a No. 5 lithium-ion battery. Background Art

[0002] At present, No. 5 lithium-ion batteries are widely used in portable electronic devices due to their advantages such as high energy density and long cycle life. However, there are still problems such as complex processes and low yield rates in their preparation process, which restrict the further development of the industry. The existing preparation processes for No. 5 batteries mostly use soft-pack rolled cores. After welding the step-down circuit, they are inserted into steel shells, which are difficult to mass-produce on a large scale and require special chargers to be configured.

[0003] The above-mentioned existing technical solutions have the following defects: The existing preparation methods have deficiencies in process control, production efficiency, and product quality, resulting in the difficulty of ensuring the safety of the battery, so there is room for improvement. Summary of the Invention

[0004] In order to improve the safety of lithium-ion batteries, the present application provides a preparation method, device, equipment and medium for a No. 5 lithium-ion battery.

[0005] The first invention object of the present application is achieved through the following technical solutions:

[0006] A preparation method for a No. 5 lithium-ion battery, the preparation method for a No. 5 lithium-ion battery includes:

[0007] Preparing the battery cell based on the cell preparation process;

[0008] Selecting the steel material for preparing the battery, stamping the steel material to obtain the upper steel shell of the battery;

[0009] Obtaining user requirements and the attribute parameters of the spring piece, and determining the bending parameters of the spring piece according to the user requirements and the attribute parameters of the spring piece;

[0010] According to the bending parameters of the spring piece, assembling the PCB board and the upper steel shell of the battery, bending the negative spring piece on the side of the PCB board towards the direction close to the cell, so that the negative spring piece is in elastic contact with the upper steel shell, and bending the positive spring piece at the bottom of the PCB board towards the direction close to the cell, so that the positive spring piece is in elastic contact with the top of the cell, to obtain a complete step-down-charging terminal;

[0011] Sheathing the complete step-down-charging terminal on the 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 cell;

[0012] Roll the semi-finished product of the battery along the rolling groove of the battery cell and fix it by rolling, and then sleeving an insulating film outside the semi-finished product after being fixed by rolling to obtain the finished product of the battery.

[0013] By adopting the above technical solutions, the battery cell of the battery 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 the subsequent battery assembly; select the steel for preparing the battery, stamp the steel to obtain the upper steel shell of the battery. Select the appropriate steel and stamp it to form the upper steel shell of the battery, providing mechanical protection and structural support for the battery cell, and at the same time ensuring isolation between the battery cell and the external environment; obtain the user requirements and the attribute parameters of the spring piece, and determine the bending parameters of the spring piece according to the user requirements and the attribute parameters of the spring piece. By analyzing the user requirements and the physical characteristics of the spring piece, accurately determine the bending angle and shape of the spring piece to achieve the expected electrical connection and mechanical performance; according to the bending parameters of the spring piece, assemble the PCB board and the upper steel shell of the battery. Bend the negative spring piece on the side of the PCB board downward so that the negative spring piece is in elastic contact with the upper steel shell, and bend the positive spring piece at the bottom of the PCB board downward so that the positive spring piece is in elastic contact with the top of the battery cell to obtain a complete step-down - charging terminal. Assemble the bent spring piece with the PCB board and the upper steel shell to form the key part of the electrical connection, ensure the correct connection between the positive and negative poles of the battery and the circuit on the PCB board, and through accurately bending the spring piece, achieve elastic contact with the upper steel shell of the battery and the top of the battery cell, forming a stable electrical connection, and at the same time constructing the step-down and charging functions of the battery; sleeving the complete step-down - charging terminal on the battery cell to obtain the semi-finished product of the battery. Sleeve the terminal assembly on the battery cell to complete the assembly of the semi-finished product of the battery, laying a foundation for the final encapsulation and testing of the battery; roll the semi-finished product of the battery along the rolling groove of the battery cell and fix it by rolling, and then sleeving an insulating film outside the semi-finished product after being fixed by rolling to obtain the finished product of the battery. By fixing through rolling, the structural stability of the battery assembly and the reliability of the electrical connection are ensured. Sleeving the insulating film provides additional electrical isolation and environmental protection, completing the final encapsulation of the battery and making it a finished product that can be used in practical applications.

[0014] In a preferred example of the present application, it can be further configured that: the selection of the steel for preparing the battery and stamping the steel to obtain the upper steel shell of the battery includes:

[0015] Obtain the attribute data of the battery, and determine the steel stamping parameters according to the attribute data of the battery;

[0016] According to the steel stamping parameters, stamp the steel to obtain the upper steel shell of the battery.

[0017] By adopting the above technical solution, the attribute data of the battery is obtained, the steel stamping parameters are determined according to the attribute data of the battery, the battery attribute data is analyzed, appropriate steel types and specifications are selected, and the key parameters in the stamping process are determined, ensuring that the steel can meet the battery design requirements, and at the same time ensuring the feasibility and efficiency of stamping forming; according to the steel stamping parameters, the steel is stamped to obtain the upper steel shell of the battery. The determined stamping parameters are used to actually stamp and process the steel to form the upper steel shell of the battery, realizing the physical shape of the battery shell, providing mechanical protection for the battery core, and ensuring the structural integrity of the battery.

[0018] In a preferred example, the present application can be further configured as follows: the upper steel shell of the battery is provided with a first through hole and a second through hole. The first through hole is opened at one end of the upper steel shell close to the battery core, and the second through hole is opened at one end of the upper steel shell far from the battery core. The aperture of the first through hole is larger than that of the second through hole, and the aperture of the first through hole is larger than 14 mm.

[0019] 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 opened at the bottom of the upper steel shell, and the second through hole is opened at the top of the upper steel shell. The aperture of the first through hole is larger than that of the second through hole, and the aperture of the first through hole is larger than 14 mm.

[0020] In a preferred example, the present application can be further configured as follows: obtaining the user requirements and the attribute parameters of the spring piece, and determining the bending parameters of the spring piece according to the user requirements and the attribute parameters of the spring piece, including:

[0021] Inputting the user requirements and the spring piece into a pre-trained bending model for comparison and analysis to obtain an analysis result;

[0022] According to the analysis result, determining the bending parameters of the spring piece, where the bending parameters of the spring piece include the angle parameter and the contact surface parameter of the spring piece.

[0023] By adopting the above technical solution, inputting the user requirements and the spring piece into a pre-trained bending model for comparison and analysis to obtain an analysis result. By inputting the specific requirements of the user and the physical attribute data of the spring piece into a trained bending model, the prediction ability of the model can be used to analyze the performance of the spring piece under different conditions. This kind of comparison and analysis can provide preliminary feedback on whether the spring piece design meets the user requirements, providing a basis for subsequent design adjustments; according to the analysis result, determining the angle parameter and the contact surface parameter of the spring piece to ensure that the spring piece can achieve the expected performance in actual applications.

[0024] In a preferred example, the present application can be further configured as follows: The method for preparing a No. 5 lithium-ion battery further includes:

[0025] Obtain the attribute parameters of the spring sheets of each material and the corresponding bending degree data, preprocess the attribute parameters of the spring sheets of each material and the corresponding bending degree data to obtain a training set;

[0026] Construct a bending model based on the decision tree algorithm, perform forward propagation and backward propagation training on the bending model using the training set, and optimize the bending model after forward propagation and backward propagation training using the genetic algorithm to obtain the pre-trained bending model.

[0027] By adopting the above technical solution, the attribute parameters of the spring sheets of each material and the corresponding bending degree data are obtained, and the attribute parameters of the spring sheets of each material and the corresponding bending degree data are preprocessed to obtain a training set, ensuring the quality of the training set; a bending model is constructed based on the decision tree algorithm, the bending model is trained by forward propagation and backward propagation using the training set, and the bending model after forward propagation and backward propagation training is optimized using the genetic algorithm to obtain the pre-trained bending model, improving the efficiency and accuracy of the spring sheet bending process.

[0028] In a preferred example, the present application can be further configured as follows: According to the analysis result, determine the bending parameters of the spring sheet, and the bending parameters of the spring sheet include the angle parameter and the contact surface parameter of the spring sheet, including:

[0029] According to the user requirements and the attribute parameters of the spring sheet, determine the bending angle and the contact surface parameters in the analysis result;

[0030] Perform a simulation test on the bending angle and the contact surface parameters to obtain the result of the simulation test;

[0031] Determine the bending angle and the contact surface parameters of the spring sheet according to the result of the simulation test.

[0032] By adopting the above technical solution, according to the user requirements and the attribute parameters of the spring sheet, determine the bending angle and the contact surface parameters in the analysis result; perform a simulation test on the bending angle and the contact surface parameters to obtain the result of the simulation test; determine the bending angle and the contact surface parameters of the spring sheet according to the result of the simulation test, improving the reliability and quality of the battery.

[0033] The second inventive object of the present application is achieved by the following technical solution:

[0034] A device for preparing a No. 5 lithium-ion battery, the device for preparing a No. 5 lithium-ion battery includes:

[0035] Prepare a battery cell module for preparing a battery cell of a battery based on a battery cell preparation process;

[0036] A stamping module for selecting steel for preparing the battery, stamping the steel to obtain an upper steel case of the battery;

[0037] A determining bending module for obtaining user requirements and attribute parameters of a spring piece, and determining bending parameters of the spring piece according to the user requirements and the attribute parameters of the spring piece;

[0038] An assembling module, according to the bending parameters of the spring piece, assembling a PCB board and the upper steel case of the battery, bending a negative spring piece on the side of the PCB board towards the direction close to the battery cell, so that the negative spring piece is in elastic contact with the upper steel case, and bending a positive spring piece at the bottom of the PCB board towards the direction close to the battery cell, so that the positive spring piece is in elastic contact with the top of the battery cell, to obtain a complete step-down - charging terminal;

[0039] A sleeving module for sleeving the complete step-down - charging terminal 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;

[0040] A rolling module for rolling and fixing the semi-finished product of the battery along a rolling groove of the battery cell, and sleeving an insulating film outside the semi-finished product after rolling and fixing to obtain a finished product of the battery.

[0041] 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; select the steel for preparing the battery, stamp the steel to obtain the upper steel shell of the battery. Select the appropriate steel and stamp it to form the upper steel shell of the battery, providing mechanical protection and structural support for the battery cell, and at the same time ensuring isolation between the battery cell and the external environment; obtain the user requirements and the attribute parameters of the spring piece. According to the user requirements and the attribute parameters of the spring piece, determine the bending parameters of the spring piece. By analyzing the user requirements and the physical characteristics of the spring piece, accurately determine the bending angle and shape of the spring piece to achieve the expected electrical connection and mechanical performance; according to the bending parameters of the spring piece, assemble the PCB board and the upper steel shell of the battery. Bend the negative spring piece on the side of the PCB board downward so that the negative spring piece elastically contacts the upper steel shell, and bend the positive spring piece at the bottom of the PCB board downward so that the positive spring piece elastically contacts the top of the battery cell to obtain a complete step-down - charging terminal. Assemble the bent spring piece with the PCB board and the upper steel shell to form the key part of the electrical connection, ensure the correct connection of the positive and negative poles of the battery to the circuit on the PCB board, and through accurately bending the spring piece, achieve elastic contact with the upper steel shell of the battery and the top of the battery cell, forming a stable electrical connection, and at the same time constructing the step-down and charging functions of the battery; sleeve the complete step-down - charging terminal on the battery cell to obtain a semi-finished product of the battery. Sleeve the terminal assembly on the battery cell to complete the assembly of the battery semi-finished product, laying a foundation for the final encapsulation and testing of the battery; 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 rolling and fixing to obtain a finished product of the battery. Through rolling and fixing, ensure the structural stability of the battery assembly and the reliability of the electrical connection. Sleeve the insulating film to provide additional electrical isolation and environmental protection, complete the final encapsulation of the battery, and make it a finished product that can be used in practical applications.

[0042] The above object three of the present application is achieved through the following technical solutions:

[0043] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above preparation method of a No. 5 lithium-ion battery are implemented.

[0044] The above object four of the present application is achieved through the following technical solutions:

[0045] A computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the steps of the above preparation method of a No. 5 lithium-ion battery are implemented.

[0046] In summary, the present application includes at least one of the following beneficial technical effects:

[0047] 1. Prepare the battery cell based on the cell preparation process. Through the standardized cell preparation process, ensure that the quality and performance of the cell meet the design requirements, providing a basic component for subsequent battery assembly. Select the steel for the battery, stamp the steel to obtain the upper steel shell of the battery. Select appropriate steel and stamp it to form the upper steel shell of the battery, providing mechanical protection and structural support for the cell, and at the same time ensuring isolation between the cell and the external environment. Obtain the user requirements and the attribute parameters of the spring piece. According to the user requirements and the attribute parameters of the spring piece, determine the bending parameters of the spring piece. By analyzing the user requirements and the physical characteristics of the spring piece, accurately determine the bending angle and shape of the spring piece to achieve the expected electrical connection and mechanical performance.

[0048] 2. According to the bending parameters of the spring piece, assemble the PCB board and the upper steel shell of the battery. Bend the negative spring piece on the side of the PCB board downward so that the negative spring piece elastically contacts the upper steel shell. Bend the positive spring piece at the bottom of the PCB board downward so that the positive spring piece elastically contacts the top of the cell, obtaining a complete step-down - charging terminal. Assemble the bent spring piece with the PCB board and the upper steel shell to form a key part of the electrical connection, ensuring the correct connection of the positive and negative poles of the battery to the circuit on the PCB board, and through precise bending of the spring piece, achieving elastic contact with the upper steel shell of the battery and the top of the cell, forming a stable electrical connection, and at the same time constructing the step-down and charging functions of the battery. Set the complete step-down - charging terminal on the cell to obtain a semi-finished product of the battery. Set the terminal assembly on the cell to complete the assembly of the battery semi-finished product, laying a foundation for the final encapsulation and testing of the battery. Roll and fix the semi-finished product of the battery along the rolling groove of the cell, and set an insulating film outside the semi-finished product after rolling and fixing to obtain the finished product of the battery. Ensure the structural stability of the battery assembly and the reliability of the electrical connection through rolling and fixing, and set the insulating film to provide additional electrical isolation and environmental protection, completing the final encapsulation of the battery to make it a finished product that can be used in practical applications. Description of the Drawings

[0049] Figure 1 is the overall structural schematic diagram of the present application;

[0050] Figure 2 is a flowchart of a preparation method of a No. 5 lithium-ion battery in an embodiment of the present application;

[0051] Figure 3 is the implementation flowchart of step S20 in a preparation method of a No. 5 lithium-ion battery in an embodiment of the present application;

[0052] Figure 4 is the implementation flowchart of step S30 in a preparation method of a No. 5 lithium-ion battery in an embodiment of the present application;

[0053] Figure 5 It is a flowchart of the implementation of step S31 in a method for manufacturing a No. 5 lithium-ion battery according to an embodiment of the present application;

[0054] Figure 6 It is a flowchart of the implementation of step S32 in a method for manufacturing a No. 5 lithium-ion battery according to an embodiment of the present application;

[0055] Figure 7 It is a schematic block diagram of a principle of a device for manufacturing a No. 5 lithium-ion battery according to an embodiment of the present application;

[0056] Figure 8 It is a schematic diagram of a device according to an embodiment of the present application.

[0057] Explanation of reference numerals: 1, upper steel shell; 2, PCB board; 3, insulating gasket; 4, battery cell; 5, insulating film; 6, positive electrode spring piece; 7, negative electrode spring piece. Detailed implementation manners

[0058] The present application will be further described in detail below with reference to the accompanying drawings.

[0059] In one embodiment, as Figure 2 shown, the present application discloses a method for manufacturing a No. 5 lithium-ion battery, which specifically includes the following steps:

[0060] S10: Prepare the battery cell of the battery based on the cell manufacturing process.

[0061] Specifically, first, according to the requirements of battery design, mix the positive electrode material, negative electrode material, binder, conductive agent and solvent in a certain proportion, uniformly coat the prepared positive electrode slurry on the aluminum foil, and coat the negative electrode slurry on the copper foil. During the coating process, it is necessary to control the coating speed and thickness to ensure the uniformity and consistency of the electrode sheet. The coated electrode sheet needs to go through a drying process to remove the solvent, leaving the uniformly distributed active material and binder. The dried electrode sheet is compacted by a roller press, and the roller-pressed electrode sheet is cut into the required size, and then die-cut into the shape required for the battery by a die-cutting machine. The cut and die-cut positive electrode sheets, negative electrode sheets and separator are alternately placed, and then wound into a roll or stacked into layers to form a preliminary structure of the battery cell.

[0062] S20: Select the steel for manufacturing the battery, and stamp the steel to obtain the upper steel shell of the battery.

[0063] Specifically, in order to improve the safety of the battery, it is necessary to select suitable steel as the material for the battery housing. After the steel is selected, it needs to be cut into dimensions suitable for stamping. This step may include pre-treatment work such as cutting and trimming to ensure that the size and shape of the steel are suitable for subsequent stamping processes. After stamping, the upper steel shell of the battery, that is, the upper cover part of the battery, is obtained. The upper steel shell is usually designed with threads or other connection mechanisms to closely fit with the lower shell of the battery and ensure that the electrolyte does not leak.

[0064] S30: Obtain the user requirements and the property parameters of the spring piece. According to the user requirements and the property parameters of the spring piece, determine the bending parameters of the spring piece.

[0065] Specifically, first, it is necessary to communicate with the user to understand their specific requirements for the product, which may include the functions, performance, dimensions, shape, usage environment, durability, etc. of the product. According to the user requirements and the property parameters of the spring piece, engineers need to determine the bending design of the spring piece to determine the degree of bending of the spring piece, making the overall structure of the battery design more secure.

[0066] S40: According to the bending parameters of the spring piece, assemble the PCB board and the upper steel shell of the battery. Bend the negative spring piece on the side of the PCB board towards the direction close to the battery cell, so that the negative spring piece elastically contacts the upper steel shell. Bend the positive spring piece at the bottom of the PCB board towards the direction close to the battery cell, so that the positive spring piece elastically contacts the top of the battery cell, obtaining a complete step-down - charging terminal.

[0067] Specifically, before assembly, it is necessary to determine the bending parameters of the spring piece, which include the bending angle, bending radius, bending shape, etc. of the spring piece. These parameters will affect the contact effect between the spring piece and the PCB board and other components and the reliability of the electrical connection. 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 piece on the side of the PCB board towards the direction close to the battery cell, so that the negative spring piece elastically contacts the upper steel shell. Bend the positive spring piece at the bottom of the PCB board towards the direction close to the battery cell, so that the positive spring piece elastically contacts the top of the battery cell. Through the above steps, the negative and positive spring pieces elastically contact the upper steel shell of the battery and the top of the battery cell respectively, forming a complete electrical connection path. This path 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.

[0068] S50: Sleeve the complete step-down - charging terminal on the battery cell to obtain a semi-finished product of the battery. An insulating gasket is provided between the complete step-down - charging terminal and the battery cell.

[0069] Specifically, the complete step-down charging terminal is sleeved on the battery cell, and the spring piece part of the terminal is aligned with the positive and negative contact areas of the battery cell. The bent part of the negative spring piece should be in elastic contact with the negative area of the battery cell, that is, the upper steel shell of the battery, and the bent part of the positive spring piece 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 contact between the spring piece and the battery cell is good to ensure that there is no risk of poor contact or short circuit, and finally obtain the semi-finished product of the battery.

[0070] S60: 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 being roll-fixed to obtain the finished product of the battery.

[0071] Specifically, some specific designs on the battery cell shell, such as grooves or hemming, are used to increase the structural stability of the battery assembly. Roll and fix the semi-finished product of the battery along the rolling groove of the battery cell, and use a pressing machine to compact the semi-finished product of the battery along the rolling groove to ensure a tight fit between the battery cell and the shell or terminal, prevent displacement or loosening during battery use, and sleeve an insulating film outside the semi-finished product after being roll-fixed to obtain the finished product of the battery.

[0072] By adopting the above technical solution, the battery cell is prepared based on the cell preparation process. Through the standardized cell preparation process, the quality and performance of the cell are ensured to meet the design requirements, providing a basic component for subsequent battery assembly; select the steel for preparing the battery, stamp the steel to obtain the upper steel shell of the battery. Select appropriate steel and perform stamping to form the upper steel shell of the battery, providing mechanical protection and structural support for the cell, and at the same time ensuring isolation between the cell and the external environment; obtain the user requirements and the attribute parameters of the spring piece. According to the user requirements and the attribute parameters of the spring piece, determine the bending parameters of the spring piece. By analyzing the user requirements and the physical characteristics of the spring piece, accurately determine the bending angle and shape of the spring piece to achieve the expected electrical connection and mechanical performance; according to the bending parameters of the spring piece, assemble the PCB board and the upper steel shell of the battery. Bend the negative spring piece on the side of the PCB board downward so that the negative spring piece elastically contacts the upper steel shell, and bend the positive spring piece at the bottom of the PCB board downward so that the positive spring piece elastically contacts the top of the cell to obtain a complete step-down - charging terminal. Assemble the bent spring piece with the PCB board and the upper steel shell to form the key part of the electrical connection, ensuring the correct connection of the positive and negative poles of the battery to the circuit on the PCB board, and through precise bending of the spring piece, achieving elastic contact with the upper steel shell of the battery and the top of the cell to form a stable electrical connection, and at the same time constructing the step-down and charging functions of the battery; sleeved the complete step-down - charging terminal on the cell to obtain a semi-finished product of the battery. Sleeve the terminal assembly on the cell to complete the assembly of the battery semi-finished product, laying a foundation for the final encapsulation and testing of the battery; roll and press the semi-finished product of the battery along the rolling groove of the cell and sleeve an insulating film outside the semi-finished product after being roll-pressed and fixed to obtain a finished product of the battery. Ensure the structural stability of the battery assembly and the reliability of the electrical connection through roll-pressing and fixing, and sleeve the insulating film to provide additional electrical isolation and environmental protection to complete the final encapsulation of the battery and make it a finished product available for practical applications.

[0073] In one embodiment, as Figure 3 shown, in step S20, that is, select the steel for preparing the battery, stamp the steel to obtain the upper steel shell of the battery, specifically including:

[0074] S21: Obtain the attribute data of the battery, and determine the steel stamping parameters according to the attribute data of the battery.

[0075] Specifically, before designing and manufacturing a battery, it is first necessary to understand the attribute data of the battery, which may include the battery's size, shape, capacity, voltage, chemical composition, expected load, operating temperature range, etc. Based on the battery's attribute data, 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, thicker or higher-strength steel may need to be selected and the stamping force adjusted accordingly.

[0076] S22: Stamp the steel according to the steel stamping parameters to obtain the upper steel shell of the battery.

[0077] Specifically, after determining the stamping parameters, the next step is to process the steel using a stamping machine. During the stamping process, the steel is placed in a die, and then a force is applied through a press to deform the steel and form the required shape. After stamping, what is obtained is the upper steel shell of the battery.

[0078] In one embodiment, as Figure 4 shown, in step S30, that is, obtaining the user requirements and the attribute parameters of the spring piece, based on the user requirements and the attribute parameters of the spring piece, determine the bending parameters of the spring piece, specifically including:

[0079] S31: Input the user requirements and the spring piece into a pre-trained bending model for comparison and analysis to obtain the analysis results.

[0080] Specifically, first, it is necessary to collect and understand the specific requirements of the user for the spring piece, input the user requirements and the attribute data of the spring piece into the analysis model, and the model will compare and analyze the user requirements with the attributes of the spring piece to determine whether the requirements of the user are met. After the analysis is completed, the model will provide results, including the performance evaluation of the spring piece under different bending conditions, potential problem points, improvement suggestions, etc.

[0081] S32: Determine the bending parameters of the spring piece according to the analysis results. The bending parameters of the spring piece include the angle parameter and the contact surface parameter of the spring piece.

[0082] Specifically, the angle parameter is a key factor determining the tightness of the fit and the elastic force between the spring piece and the contact surface. Therefore, according to the analysis results, the specific angle to which the spring piece needs to be bent can be determined. If the analysis results show that the current design does not meet the user requirements, it may be necessary to adjust the design of the spring piece, such as changing the material, size, or bending shape, and then re-analyze until a solution that meets all requirements is found.

[0083] In one embodiment, as Figure 5As shown, in step S31, the user requirements and the spring piece are input into a pre-trained bending model for comparison and analysis to obtain an analysis result. The pre-trained bending model specifically includes:

[0084] S301: Obtain the attribute parameters and corresponding bending degree data of the spring pieces of each material, preprocess the attribute parameters and corresponding bending degree data of the spring pieces of each material to obtain a training set.

[0085] Specifically, first, it is necessary to collect the attribute parameters of the spring pieces of different materials, including the material type, size, elastic coefficient, tensile strength, yield strength, etc. of the spring piece. At the same time, collect the bending degree data of each material of the spring piece under different bending conditions, including the bending angle, bending radius, etc. Preprocess the collected data to facilitate subsequent model training. The preprocessed data is organized into a format suitable for model training to form a training set.

[0086] S302: Build a bending model based on the decision tree algorithm, perform forward propagation and backward propagation training on the bending model using the training set, and optimize the bending model after forward propagation and backward propagation training using the genetic algorithm to obtain a pre-trained bending model.

[0087] Specifically, build a bending model based on the decision tree algorithm, perform forward propagation and backward propagation training on the bending model using the training set, and optimize the bending model after forward propagation and backward propagation training using the genetic algorithm to obtain a pre-trained bending model. After forward propagation and backward propagation training, combined with the optimization of the genetic algorithm, a pre-trained bending model is finally obtained, which can predict the bending behavior of the spring piece under specific conditions according to the attribute parameters of the spring piece.

[0088] In one embodiment, as Figure 6 shown, in step S32, that is, according to the analysis result, determine the angle parameter and contact surface parameter of the spring piece, specifically including:

[0089] S321: Determine the bending angle and contact surface parameter in the analysis result according to the user requirements and the attribute parameters of the spring piece.

[0090] Specifically, use the user requirements and the attribute parameters of the spring piece to determine the bending angle and contact surface parameter of the spring piece through analysis. The bending angle determines the deformation degree of the spring piece, while the contact surface parameter affects the contact effect between the spring piece and other components.

[0091] S322: Perform a simulation test on the bending angle and contact surface parameter to obtain the result of the simulation test.

[0092] Specifically, computer-aided simulation tests are conducted on the preliminarily determined bending angle and contact surface parameters. The simulation tests can predict the performance of the spring piece in actual applications without actually manufacturing the spring piece. After the simulation tests are completed, the simulation result data is analyzed to evaluate whether the bending performance of the spring piece 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 piece conforms to the expectation.

[0093] S323: Determine the bending angle and contact surface parameters of the spring piece according to the results of the simulation tests.

[0094] Specifically, if the simulation test results indicate that the current bending angle or contact surface parameters do not meet the requirements, these parameters need to be adjusted. After adjusting the parameters, the simulation tests are conducted again to verify the performance of the spring piece under the new parameters. After a series of simulation tests and parameter adjustments, a set of bending angles and contact surface parameters that meet the user needs and design standards are finally determined.

[0095] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The order of execution of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0096] In one embodiment, a preparation device for a No. 5 lithium-ion battery is provided. The preparation device for the No. 5 lithium-ion battery corresponds one-to-one with the preparation method for the No. 5 lithium-ion battery in the above embodiment. As Figure 7 shown, the preparation device for the No. 5 lithium-ion battery includes a cell preparation module, a stamping module, a bending determination module, an assembly module, a sleeving module, and a rolling module. The detailed description of each functional module is as follows:

[0097] The cell preparation module is used to prepare the cell of the battery based on the cell preparation process;

[0098] The stamping module is used to select the steel for preparing the battery and stamp the steel to obtain the upper steel shell of the battery;

[0099] The bending determination module is used to obtain the user needs and the attribute parameters of the spring piece, and determine the bending parameters of the spring piece according to the user needs and the attribute parameters of the spring piece;

[0100] The assembly module is used to assemble the PCB board and the upper steel shell of the battery according to the bending parameters of the spring piece, bend the negative spring piece on the side of the PCB board towards the direction close to the cell, so that the negative spring piece is in elastic contact with the upper steel shell, and bend the positive spring piece at the bottom of the PCB board towards the direction close to the cell, so that the positive spring piece is in elastic contact with the top of the cell, to obtain a complete step-down-charging terminal;

[0101] A sheathing module for sheathing a complete step-down charging terminal on a battery cell to obtain a semi-finished battery, with an insulating gasket provided between the complete step-down charging terminal and the battery cell;

[0102] A rolling module for rolling and fixing the semi-finished battery along the rolling groove of the battery cell, and sheathing an insulating film outside the semi-finished battery fixed by rolling to obtain a finished battery.

[0103] Optionally, the stamping module includes:

[0104] An attribute acquisition sub-module for acquiring attribute data of the battery and determining steel stamping parameters according to the attribute data of the battery;

[0105] A steel stamping sub-module for stamping the steel according to the steel stamping parameters to obtain the upper steel shell of the battery.

[0106] Optionally, the bending determination module includes:

[0107] An analysis sub-module for inputting user requirements and a spring piece into a pre-trained bending model for comparison and analysis to obtain an analysis result;

[0108] A parameter determination sub-module for determining the bending parameters of the spring piece according to the analysis result, where the bending parameters of the spring piece include the angle parameter and the contact surface parameter of the spring piece.

[0109] Optionally, the analysis sub-module includes:

[0110] A training set acquisition unit for acquiring the attribute parameters and corresponding bending degree data of spring pieces of various materials, preprocessing the attribute parameters and corresponding bending degree data of spring pieces of various materials to obtain a training set;

[0111] A training unit for constructing a bending model based on a decision tree algorithm, performing forward propagation and backward propagation training on the bending model using the training set, and optimizing the bending model trained by forward propagation and backward propagation using a genetic algorithm to obtain a pre-trained bending model.

[0112] Optionally, the parameter determination sub-module includes:

[0113] An attribute parameter determination unit for determining the bending angle and contact surface parameters in the analysis result according to the user requirements and the attribute parameters of the spring piece;

[0114] A simulation test unit for performing a simulation test on the bending angle and contact surface parameters to obtain the result of the simulation test;

[0115] A contact surface parameter determination unit for determining the bending angle and contact surface parameters of the spring piece according to the result of the simulation test.

[0116] For the specific limitations of a preparation device for a No. 5 lithium-ion battery, reference can be made to the limitations of the preparation method for a No. 5 lithium-ion battery in the above text, which will not be elaborated here. Each module in the above preparation device for a No. 5 lithium-ion battery can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor of the computer device in hardware form or be independent of it, or can be stored in the memory of the computer device in software form, so as to facilitate the processor to call and execute the operations corresponding to each of the above modules.

[0117] In one embodiment, a computer device is provided. The computer device can be a server, and its internal structure diagram can be as Figure 8 shown. The computer device includes a processor, a memory, a network interface, and a database connected through a system bus. 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 network 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, it realizes a preparation method for a No. 5 lithium-ion battery.

[0118] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the following steps are realized:

[0119] Prepare the battery cell based on the cell preparation process;

[0120] Select the steel for preparing the battery, and stamp the steel to obtain the upper steel shell of the battery;

[0121] Obtain the user requirements and the attribute parameters of the spring piece, and determine the bending parameters of the spring piece according to the user requirements and the attribute parameters of the spring piece;

[0122] According to the bending parameters of the spring piece, assemble the PCB board and the upper steel shell of the battery, bend the negative spring piece on the side of the PCB board towards the direction close to the cell, so that the negative spring piece is in elastic contact with the upper steel shell, and bend the positive spring piece at the bottom of the PCB board towards the direction close to the cell, so that the positive spring piece is in elastic contact with the top of the cell, to obtain a complete step-down - charging terminal;

[0123] Put the complete step-down - charging terminal on the 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 cell;

[0124] Roll the semi-finished product of the battery along the rolling groove of the battery cell to fix it, and sleeving an insulating film outside the semi-finished product after rolling and fixing to obtain the finished product of the battery.

[0125] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0126] Prepare the battery cell based on the battery cell preparation process;

[0127] Select the steel material for the battery, and stamp the steel material to obtain the upper steel shell of the battery;

[0128] Obtain the user requirements and the attribute parameters of the spring piece, and determine the bending parameters of the spring piece according to the user requirements and the attribute parameters of the spring piece;

[0129] According to the bending parameters of the spring piece, assemble the PCB board and the upper steel shell of the battery, bend the negative spring piece on the side of the PCB board towards the direction close to the battery cell, so that the negative spring piece is in elastic contact with the upper steel shell, and bend the positive spring piece at the bottom of the PCB board towards the direction close to the battery cell, so that the positive spring piece is in elastic contact with the top of the battery cell to obtain a complete step-down-charging terminal;

[0130] Set the complete step-down-charging terminal on the battery cell to obtain the semi-finished product of the battery, and an insulating gasket is provided between the complete step-down-charging terminal and the battery cell;

[0131] Roll the semi-finished product of the battery along the rolling groove of the battery cell to fix it, and sleeving an insulating film outside the semi-finished product after rolling and fixing to obtain the finished product of the battery.

[0132] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. 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 methods. Among them, any reference to a memory, storage, database, or other medium used in the embodiments provided in the present application can include non-volatile and / or volatile memories. Non-volatile memories can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memories can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0133] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0134] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and 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 all be included in the protection scope of the present application.

Claims

1. A preparation method of a No. 5 lithium-ion battery, characterized in that, The preparation method of the 5 - type lithium - ion battery includes: Preparing the battery cell based on the cell preparation process; Selecting the steel material for preparing the battery, stamping the steel material to obtain the upper steel shell of the battery; Obtaining the attribute parameters of the spring sheets of each material and the corresponding bending degree data, pre - processing the attribute parameters of the spring sheets of each material and the corresponding bending degree data to obtain a training set; Constructing a bending model based on the decision - tree algorithm, performing forward - propagation and backward - propagation training on the bending model using the training set, and optimizing the bending model after forward - propagation and backward - propagation training using the genetic algorithm to obtain a pre - trained bending model; Obtaining the user requirements and the attribute parameters of the spring sheet, and determining the bending parameters of the spring sheet according to the user requirements and the attribute parameters of the spring sheet; The step of obtaining the user requirements and the attribute parameters of the spring sheet, and determining the bending parameters of the spring sheet according to the user requirements and the attribute parameters of the spring sheet includes: Inputting the user requirements and the spring sheet into the pre - trained bending model for comparison and analysis to obtain an analysis result; Determining the bending parameters of the spring sheet according to the analysis result, where the bending parameters of the spring sheet include the angle parameter and the contact surface parameter of the spring sheet; The step of determining the bending parameters of the spring sheet according to the analysis result, where the bending parameters of the spring sheet include the angle parameter and the contact surface parameter of the spring sheet includes: Determining the bending angle and the contact surface parameter in the analysis result according to the user requirements and the attribute parameters of the spring sheet; Performing a simulation test on the bending angle and the contact surface parameter to obtain the result of the simulation test; Determining the bending angle and the contact surface parameter of the spring sheet according to the result of the simulation test; Assembling the PCB board and the upper steel shell of the battery according to the bending parameters of the spring sheet, bending the negative - pole spring sheet on the side of the PCB board towards the direction close to the cell so that the negative - pole spring sheet elastically contacts the upper steel shell, and bending the positive - pole spring sheet at the bottom of the PCB board towards the direction close to the cell so that the positive - pole spring sheet elastically contacts the top of the cell to obtain a complete step - down - charging terminal; Putting the complete step - down - charging terminal on the 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 cell; Rolling and fixing the semi - finished product of the battery along the rolling groove of the cell, and sleeving an insulating film outside the semi - finished product after rolling and fixing to obtain the finished product of the battery.

2. The preparation method of a No. 5 lithium-ion battery according to claim 1, characterized in that The step of selecting the steel material for preparing the battery, stamping the steel material to obtain the upper steel shell of the battery includes: Obtaining the attribute data of the battery, and determining the steel stamping parameters according to the attribute data of the battery; Stamping the steel material according to the steel stamping parameters to obtain the upper steel shell of the battery.

3. The preparation method of a No. 5 lithium-ion battery according to claim 2, characterized in that, The upper steel case of the battery is provided with a first through hole and a second through hole. The first through hole is opened at one end of the upper steel case close to the battery cell, and the second through hole is opened at one end of the upper steel case far from the battery cell. The aperture of the first through hole is larger than that of the second through hole, and the aperture of the first through hole is larger than 14 mm.

4. A preparation device for a No. 5 lithium-ion battery, characterized in that, The preparation device of the No. 5 lithium-ion battery includes: A battery cell preparation module for preparing the battery cell of the battery based on the battery cell preparation process; A stamping module for selecting the steel material for manufacturing the battery, stamping the steel material to obtain the upper steel case of the battery; A training set obtaining unit for acquiring the attribute parameters of the spring sheets of various materials and the corresponding bending degree data, preprocessing the attribute parameters of the spring sheets of various materials and the corresponding bending degree data to obtain a training set; A training unit for constructing a bending model based on the decision tree algorithm, performing forward propagation and backward propagation training on the bending model using the training set, and optimizing the bending model after forward propagation and backward propagation training using the genetic algorithm to obtain a pre-trained bending model; A bending parameter determination module for obtaining user requirements and the attribute parameters of the spring sheet, and determining the bending parameters of the spring sheet according to the user requirements and the attribute parameters of the spring sheet; An assembly module for assembling the PCB board and the upper steel case of the battery according to the bending parameters of the spring sheet, bending the negative electrode spring sheet on the side of the PCB board downward so that the negative electrode spring sheet is in elastic contact with the upper steel case, and bending the positive electrode spring sheet at the bottom of the PCB board downward so that the positive electrode spring sheet is in elastic contact with the top of the battery cell to obtain a complete step-down charging terminal; A sleeving module for sleeving the complete step-down charging terminal on the battery cell to obtain a semi-finished product of the battery. An insulating gasket is provided between the complete step-down charging terminal and the battery cell; A rolling module for rolling and fixing the semi-finished product of the battery along the rolling groove of the battery cell, and sleeving an insulating film outside the semi-finished product after rolling and fixing to obtain the finished product of the battery; The bending parameter determination module includes: An analysis sub-module for inputting the user requirements and the spring sheet into the pre-trained bending model for comparison and analysis to obtain an analysis result; A parameter determination sub-module for determining the bending parameters of the spring sheet according to the analysis result. The bending parameters of the spring sheet include the angle parameter and the contact surface parameter of the spring sheet; The parameter determination sub-module includes: An attribute parameter determination unit for determining the bending angle and the contact surface parameter in the analysis result according to the user requirements and the attribute parameters of the spring sheet; A simulation test unit for performing a simulation test on the bending angle and the contact surface parameter to obtain the result of the simulation test; A contact surface parameter determination unit for determining the bending angle and the contact surface parameter of the spring sheet according to the result of the simulation test.

5. The manufacturing apparatus of a No. 5 lithium ion battery according to claim 4, characterized in that, The stamping module includes: A stamping parameter determination sub-module for acquiring the attribute data of the battery and determining the steel material stamping parameters according to the attribute data of the battery; A stamping steel shell sub-module is used to stamp the steel according to the steel stamping parameters to obtain the upper steel shell of the battery.

6. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, the steps of the preparation method of a No. 5 lithium-ion battery according to any one of claims 1 to 3 are implemented.

7. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the steps of the preparation method of a No. 5 lithium-ion battery according to any one of claims 1 to 3 are implemented.

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