Winding control method and system based on battery roll core semi-automatic winding machine

Abstract

The invention relates to a winding control method and system based on a battery roll core semi-automatic winding machine, and the method comprises the steps: analyzing a battery roll core drawing, obtaining a battery winding angle and the thickness of a battery diaphragm, calculating the single-layer bending curvature of each layer of battery diaphragm, and analyzing the winding needle rotation angle of the winding machine corresponding to the diaphragm according to the single-layer bending curvature, calculating a winding core corner linear speed according to the winding needle rotation angle and the winding period of the corresponding diaphragm to obtain corner linear speed data, analyzing a speed change association relationship between the winding speed of the adjacent diaphragm and the corner linear speed according to the corner linear speed data, and constructing a winding control model of the battery winding core according to the speed change association relationship. And acquiring pole piece coverage data in the battery core winding process, inputting the pole piece coverage data into the winding control model for winding core defect analysis, and adjusting the winding speed of the corresponding diaphragm according to an analysis result to obtain winding core winding control data. The winding control method has the effect of improving winding control intelligence.

Description

Technical Field

[0001] The present application relates to the technical field of battery winding control, and in particular to a winding control method and system based on a semi-automatic winding machine for a battery core. Background Art

[0002] At present, with the rise of new energy vehicles, people are gradually paying attention to the safety of new energy batteries, and the safety of new energy batteries depends on the precise winding during the battery preparation process.

[0003] Existing battery core winding machines usually use round, elliptical or flat prism-shaped winding needles to carry out battery diaphragm core winding operations. When the battery core is wound to a certain extent, the positive and negative electrode sheets are inserted and then wound to obtain a finished battery. However, different types of winding needles have different curvatures, which can easily cause the battery's pole ears to deform. The deformed pole ears can easily cause wrinkling and deformation inside the battery cell during the subsequent core pressing process, affecting the quality of the finished battery. Therefore, it is necessary to further optimize the winding control method of the battery core winding machine. Summary of the invention

[0004] In order to improve the intelligence of the winding control of the semi-automatic winding machine for battery cores and improve the yield rate of finished battery cores, the present application provides a winding control method and system based on the semi-automatic winding machine for battery cores.

[0005] In the first aspect, the above-mentioned invention objective of the present application is achieved through the following technical solutions:

[0006] A winding control method based on a semi-automatic winding machine for a battery core, comprising:

[0007] Analyze the battery core drawing to obtain the battery winding angle and the battery separator thickness, and calculate the single-layer bending curvature of each layer of the battery separator according to the battery winding angle and the battery separator thickness;

[0008] Analyze the rotation angle of the winding needle of the corresponding diaphragm according to the single-layer bending curvature, and calculate the corner linear velocity of the winding core according to the rotation angle of the winding needle and the winding cycle of the corresponding diaphragm to obtain the corner linear velocity data;

[0009] According to the corner linear velocity data, analyzing the speed change correlation between the winding speed of adjacent diaphragms and the corner linear velocity, and constructing a winding control model of the battery core according to the speed change correlation;

[0010] The pole piece coverage data during the battery core winding process is obtained and input into the winding control model for core defect analysis. The winding speed of the corresponding diaphragm is adjusted according to the analysis results to obtain the core winding control data.

[0011] In a preferred example, the present application can be further configured as follows: analyzing the battery core drawing to obtain the battery winding angle and the battery separator thickness, and calculating the single-layer bending curvature of each battery separator layer according to the battery winding angle and the battery separator thickness, specifically including:

[0012] The single-layer bending curvature of the battery separator is expressed by formula (1), which is as follows:

[0013]

[0014] Among them, κ n represents the single-layer bending curvature of the nth battery separator, represents the battery winding angle of the nth battery separator, d n Represents the battery separator thickness of the nth battery separator layer.

[0015] By adopting the above technical scheme, during the battery core winding process of the battery core semi-automatic winding machine, the battery parameters such as the battery winding angle and the battery separator thickness are obtained by analyzing the battery core drawing, and the single-layer bending curvature of each layer of the battery separator is preliminarily calculated, which helps to adjust the battery core semi-automatic winding machine to the optimal winding state, and analyze the needle rotation angle through the single-layer winding curvature, and then combine the corresponding winding cycle to perform the core corner linear velocity, improve the corner linear velocity control accuracy, and construct a winding control model based on the speed change correlation between the adjacent separator winding speed and the corner linear velocity, which helps to improve the control convenience of the battery core, and use the model to analyze the core defects of the pole piece coverage, and adjust the winding speed of the separator according to the analysis results, which helps to reduce the core defects caused by the unbalanced winding of the battery separator through the adjusted winding speed, thereby improving the winding control intelligence of the battery core semi-automatic winding machine and improving the finished product yield of the battery core.

[0016] In a preferred example, the present application can be further configured as follows: the winding needle rotation angle of the winding machine corresponding to the diaphragm is analyzed according to the single-layer bending curvature, and the corner linear velocity of the winding core is calculated according to the winding needle rotation angle and the winding cycle of the corresponding diaphragm to obtain the corner linear velocity data, specifically including:

[0017] Obtaining the winding distance between the to-be-wound corner and the winding core of the winding machine, and analyzing the rotation angle of the winding needle of the corresponding diaphragm at the to-be-wound corner in combination with the single-layer bending curvature;

[0018] The winding cycle of the corresponding separator is analyzed according to the number of winding layers of the battery separator, and the corner linear velocity of the winding core is calculated in combination with the rotation angle of the winding needle to obtain the corner linear velocity data.

[0019] In a preferred example, the present application can be further configured as follows: the winding cycle of the corresponding diaphragm is analyzed according to the number of winding layers of the battery diaphragm, and the corner linear velocity of the winding core is calculated in combination with the rotation angle of the winding needle to obtain the corner linear velocity data, specifically including:

[0020] The core corner linear velocity is calculated by formula (2), which is as follows:

[0021]

[0022] Among them, V m represents the core corner linear velocity, κ n represents the single-layer bending curvature of the nth battery separator. The layer level of the battery separator represents the winding period of the separator. m Indicates the winding distance between the mth winding corner and the winding machine core, L m It represents the length of the connecting line between the m-1th corner to be wound and the mth corner to be wound in the winding direction, which is at right angles to the extension line of the winding core; θ represents the rotation angle of the winding needle of the winding machine at the corner to be wound.

[0023] By adopting the above technical solution, the winding needle rotation angle analysis is performed based on the winding distance between the winding corner and the winding machine core and the single-layer bending curvature of the corresponding diaphragm, which helps to further improve the control accuracy of the winding needle rotation angle, and the diaphragm winding cycle analysis is performed in combination with the number of winding layers of the battery diaphragm to improve the corner linear speed control accuracy of each winding cycle.

[0024] In a preferred example, the present application can be further configured as follows: the electrode sheet coverage data in the battery core winding process is obtained and input into the winding control model to perform core defect analysis, and the winding speed of the corresponding diaphragm is adjusted according to the analysis result to obtain the core winding control data, specifically including:

[0025] Compare the pole piece coverage data with the preset winding parameters of each layer of battery separator in the model layer by layer, locate and analyze the pole piece defect position according to the comparison results, and obtain the winding core defect analysis data;

[0026] According to the core defect analysis data, unwinding correction processing is performed on the pole piece defect position, and the diaphragm winding speed corresponding to the winding cycle is adjusted according to the correction result to obtain the core winding control data.

[0027] By adopting the above technical scheme, the pole piece coverage data after battery winding is compared layer by layer with the preset winding parameters of each layer of battery diaphragm in the model, and the places where the pole piece coverage does not meet the preset winding parameters are found out through the comparison results, and the pole piece defect position is located. Winding fault analysis is performed according to the pole piece coverage defect parameters, which helps to improve the accuracy of core defect analysis, and through targeted processing of the pole piece defect position, the control accuracy of battery diaphragm winding is improved by unwinding correction, and the core control accuracy is improved by adjusting the diaphragm winding speed corresponding to the winding cycle.

[0028] In the second aspect, the above invention objective of the present application is achieved through the following technical solutions:

[0029] A winding control system based on a semi-automatic winding machine for a battery core, comprising:

[0030] A data calculation module, used for analyzing the battery core drawing to obtain the battery winding angle and the battery separator thickness, and calculating the single-layer bending curvature of each layer of the battery separator according to the battery winding angle and the battery separator thickness;

[0031] A winding control module, used for analyzing the rotation angle of the winding needle of the winding machine corresponding to the diaphragm according to the single-layer bending curvature, and calculating the corner linear velocity of the winding core according to the rotation angle of the winding needle and the winding cycle of the corresponding diaphragm to obtain corner linear velocity data;

[0032] A model building module, used to analyze the speed change correlation relationship between the winding speed of adjacent diaphragms and the corner linear speed according to the corner linear speed data, and to build a winding control model of the battery core according to the speed change correlation relationship;

[0033] The winding adjustment module is used to obtain the pole piece coverage data during the battery core winding process and input it into the winding control model to perform core defect analysis, adjust the winding speed of the corresponding diaphragm according to the analysis results, and obtain the core winding control data.

[0034] By adopting the above technical scheme, during the battery core winding process of the battery core semi-automatic winding machine, the battery parameters such as the battery winding angle and the battery separator thickness are obtained by analyzing the battery core drawing, and the single-layer bending curvature of each layer of the battery separator is preliminarily calculated, which helps to adjust the battery core semi-automatic winding machine to the optimal winding state, and analyze the needle rotation angle through the single-layer winding curvature, and then combine the corresponding winding cycle to perform the core corner linear velocity, improve the corner linear velocity control accuracy, and construct a winding control model based on the speed change correlation between the adjacent separator winding speed and the corner linear velocity, which helps to improve the control convenience of the battery core, and use the model to analyze the core defects of the pole piece coverage, and adjust the winding speed of the separator according to the analysis results, which helps to reduce the core defects caused by the unbalanced winding of the battery separator through the adjusted winding speed, thereby improving the winding control intelligence of the battery core semi-automatic winding machine and improving the finished product yield of the battery core.

[0035] On the third aspect, the above-mentioned purpose of the present application is achieved through the following technical solutions:

[0036] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the winding control method based on the semi-automatic winding machine for battery cores are implemented.

[0037] Fourthly, the above-mentioned purpose of the present application is achieved through the following technical solutions:

[0038] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the winding control method based on the semi-automatic winding machine for battery cores are implemented.

[0039] In summary, the present application includes at least one of the following beneficial technical effects:

[0040] 1. In the process of battery core winding by the semi-automatic battery core winding machine, the battery parameters such as battery winding angle and battery separator thickness are obtained by analyzing the battery core drawing, and the single-layer bending curvature of each layer of battery separator is preliminarily calculated, which is helpful to adjust the semi-automatic battery core winding machine to the optimal winding state, and analyze the rotation angle of the winding needle through the single-layer winding curvature, and then combine the corresponding winding cycle to perform the core corner linear speed, improve the accuracy of corner linear speed control, and combine the speed change correlation between the adjacent separator winding speed and the corner linear speed to build a winding control model, which is helpful to improve the control convenience of the battery core, and analyze the core defects of the pole piece coverage through the model, and adjust the winding speed of the separator according to the analysis results, which is helpful to reduce the core defects caused by the unbalanced winding of the battery separator through the adjusted winding speed, thereby improving the winding control intelligence of the semi-automatic battery core winding machine and improving the finished product yield of the battery core;

[0041] 2. The needle rotation angle analysis is performed based on the winding distance between the winding corner and the winding core of the winding machine and the corresponding single-layer bending curvature of the diaphragm, which helps to further improve the control accuracy of the needle rotation angle. The diaphragm winding cycle analysis is performed in combination with the number of winding layers of the battery diaphragm to improve the corner linear speed control accuracy of each winding cycle;

[0042] 3. Compare the pole piece coverage data after battery winding with the preset winding parameters of each layer of battery diaphragm in the model layer by layer. Use the comparison results to find out where the pole piece coverage does not meet the preset winding parameters and locate the pole piece defect position. Perform winding fault analysis based on the pole piece coverage defect parameters, which helps to improve the accuracy of core defect analysis. Through targeted processing of the pole piece defect position, the control accuracy of battery diaphragm winding is improved through unwinding correction, and the core control accuracy is improved by adjusting the diaphragm winding speed corresponding to the winding cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a flow chart of an implementation of a winding control method based on a semi-automatic winding machine for a battery core in this embodiment.

[0044] Figure 2 It is a flowchart for implementing step S20 of the winding control method based on the semi-automatic winding machine for battery cores of this embodiment.

[0045] Figure 3 It is a flowchart for implementing step S40 of the winding control method based on the semi-automatic winding machine for battery cores of this embodiment.

[0046] Figure 4 This is a structural block diagram of a winding control system based on a semi-automatic winding machine for battery cores according to this embodiment.

[0047] Figure 5It is a schematic diagram of the internal structure of a computer device used to implement the winding control method of this embodiment. DETAILED DESCRIPTION

[0048] The present application is further described in detail below in conjunction with the accompanying drawings.

[0049] In one embodiment, if Figure 1 As shown, the present application discloses a winding control method based on a semi-automatic winding machine for a battery core, which specifically includes the following steps:

[0050] S10: Analyze the battery core drawing to obtain the battery winding angle and the battery separator thickness, and calculate the single-layer bending curvature of each layer of the battery separator according to the battery winding angle and the battery separator thickness.

[0051] Specifically, the battery core drawing is obtained by image scanning, and the battery winding angle and the battery separator thickness are obtained by combining the battery structure data on the battery core drawing. The single-layer bending curvature of the battery separator is expressed by formula (1), and formula (1) is as follows:

[0052]

[0053] Among them, κ n represents the single-layer bending curvature of the nth battery separator, represents the battery winding angle of the nth battery separator, d n Represents the battery separator thickness of the nth battery separator layer.

[0054] S20: analyzing the rotation angle of the winding needle of the winding machine corresponding to the diaphragm according to the single-layer bending curvature, and calculating the corner linear velocity of the winding core according to the rotation angle of the winding needle and the winding cycle of the corresponding diaphragm to obtain the corner linear velocity data.

[0055] Specifically, Figure 2 As shown, step S20 includes:

[0056] S201: Obtain the winding distance between the corner to be wound and the winding core of the winding machine, and analyze the rotation angle of the winding needle of the corresponding diaphragm at the corner to be wound in combination with the single-layer bending curvature.

[0057] Specifically, the winding distance between the corner to be wound and the winding machine core is obtained in each winding cycle, and the rotation angle of the winding machine needle at the corner to be wound of the corresponding diaphragm is analyzed in combination with the single-layer bending curvature of the corresponding winding cycle. The rotation angle of the winding needle in each winding cycle is the product of the rotation angle of the previous winding cycle and the current bending curvature. The first layer winding rotation angle of the battery diaphragm is the product of the core fixed angle and the first diaphragm winding bending curvature.

[0058] S202: Analyze the winding period of the corresponding separator according to the number of winding layers of the battery separator, and calculate the corner linear velocity of the winding core in combination with the rotation angle of the winding needle to obtain the corner linear velocity data.

[0059] Specifically, the core corner linear velocity is calculated by formula (2), which is as follows:

[0060]

[0061] Among them, V m represents the core corner linear velocity, κ n represents the single-layer bending curvature of the nth battery separator. The layer level of the battery separator represents the winding period of the separator. m Indicates the winding distance between the mth winding corner and the winding machine core, L m It represents the length of the connecting line between the m-1th corner to be wound and the mth corner to be wound in the winding direction, which is at right angles to the extension line of the winding core; θ represents the rotation angle of the winding needle of the winding machine at the corner to be wound.

[0062] S30: Analyze the speed change correlation between the winding speed of adjacent diaphragms and the corner linear speed according to the corner linear speed data, and construct a winding control model of the battery core according to the speed change correlation.

[0063] Specifically, based on the corner linear velocity data, the difference between the winding speeds of adjacent diaphragms and the curvature of the change in the corner linear velocity are calculated, and the speed change correlation relationship is obtained with the winding curvature as the correlation point. The speed change correlation relationships of adjacent cycles are connected according to the winding cycle and the winding control model of the battery core is constructed.

[0064] S40: Obtain the electrode coverage data during the battery core winding process and input it into the winding control model to perform core defect analysis, adjust the winding speed of the corresponding diaphragm according to the analysis results, and obtain the core winding control data.

[0065] Specifically, Figure 3 As shown, step S40 includes:

[0066] S401: Compare the pole piece coverage data with the preset winding parameters of each layer of battery separator in the model layer by layer, locate and analyze the pole piece defect position according to the comparison results, and obtain the winding core defect analysis data.

[0067] Specifically, the coverage between the battery electrode and the diaphragm after the battery is wound is compared with the preset winding parameters of each layer of the battery diaphragm in the model. According to the comparison results, the places where the coverage between the electrode and the diaphragm is incomplete or there are deviations from the preset winding parameters are found and the fault is located. The cause of the electrode coverage defect is analyzed by comparison and reference in combination with historical winding failures, thereby obtaining the core defect analysis data of the current battery.

[0068] S402: Perform unwinding correction processing on the defect position of the pole piece according to the core defect analysis data, adjust the diaphragm winding speed of the corresponding winding cycle according to the correction result, and obtain the core winding control data.

[0069] Specifically, the unwinding correction processing is performed on the defective position of the pole piece according to the core defect analysis data, and the pole piece defective position is compensated and corrected by adjusting the unwinding tension and unwinding size of the diaphragm and the pole piece until the pole piece defect position is consistent with the preset winding parameters within the allowable error range, and the diaphragm winding speed of the corresponding winding cycle is adjusted according to the compensation and correction results to obtain the core winding control data.

[0070] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0071] In one embodiment, a winding control system based on a semi-automatic winding machine for a battery core is provided, and the winding control system based on the semi-automatic winding machine for a battery core corresponds one-to-one with the winding control method based on the semi-automatic winding machine for a battery core in the above embodiment. Figure 4 As shown, the winding control system based on the semi-automatic winding machine for battery cores includes a data calculation module, a winding control module, a model building module and a winding adjustment module. The detailed description of each functional module is as follows:

[0072] The data calculation module is used to analyze the battery core drawing to obtain the battery winding angle and the battery separator thickness, and calculate the single-layer bending curvature of each layer of the battery separator according to the battery winding angle and the battery separator thickness.

[0073] The winding control module is used to analyze the rotation angle of the winding needle of the corresponding diaphragm according to the single-layer bending curvature, and calculate the corner linear speed of the core according to the rotation angle of the winding needle and the winding cycle of the corresponding diaphragm to obtain the corner linear speed data.

[0074] The model building module is used to analyze the speed change correlation between the winding speed of adjacent diaphragms and the corner linear speed based on the corner linear speed data, and to build a winding control model for the battery core based on the speed change correlation.

[0075] The winding adjustment module is used to obtain the electrode coverage data during the battery core winding process and input it into the winding control model for core defect analysis. The winding speed of the corresponding diaphragm is adjusted according to the analysis results to obtain the core winding control data.

[0076] Preferably, the data calculation module specifically includes:

[0077] The single-layer bending curvature of the battery separator is expressed by formula (1), which is as follows:

[0078]

[0079] Among them, κ n represents the single-layer bending curvature of the nth battery separator, represents the battery winding angle of the nth battery separator, d n Represents the battery separator thickness of the nth battery separator layer.

[0080] Preferably, the winding control module specifically includes:

[0081] The parameter acquisition submodule is used to obtain the winding distance between the corner to be wound and the winding machine core, and analyze the rotation angle of the winding machine needle of the corresponding diaphragm at the corner to be wound in combination with the single-layer bending curvature.

[0082] The parameter calculation submodule is used to analyze the winding cycle of the corresponding separator according to the number of winding layers of the battery separator, and calculate the corner linear velocity of the winding core in combination with the rotation angle of the winding needle to obtain the corner linear velocity data.

[0083] Preferably, the parameter calculation module specifically includes:

[0084] The core corner linear velocity is calculated by formula (2), which is as follows:

[0085]

[0086] Among them, V m represents the core corner linear velocity, κ n represents the single-layer bending curvature of the nth battery separator. The layer level of the battery separator represents the winding period of the separator. m Indicates the winding distance between the mth winding corner and the winding machine core, L m It represents the length of the connecting line between the m-1th corner to be wound and the mth corner to be wound in the winding direction, which is at right angles to the extension line of the winding core; θ represents the rotation angle of the winding needle of the winding machine at the corner to be wound.

[0087] Preferably, the winding adjustment module specifically includes:

[0088] The parameter analysis submodule is used to compare the pole piece coverage data with the preset winding parameters of each layer of battery separator in the model layer by layer, locate and analyze the pole piece defect position according to the comparison results, and obtain the core defect analysis data.

[0089] The unwinding control submodule is used to perform unwinding correction processing on the pole piece defect position according to the core defect analysis data, adjust the diaphragm winding speed of the corresponding winding cycle according to the correction result, and obtain the core winding control data.

[0090] For the specific definition of the winding control system based on the semi-automatic winding machine for battery cores, please refer to the definition of the winding control method based on the semi-automatic winding machine for battery cores mentioned above, which will not be repeated here. Each module in the above-mentioned winding control system based on the semi-automatic winding machine for battery cores can be implemented in whole or in part through software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0091] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 5 As shown. The computer device includes a processor, a memory, a network interface and a database connected via 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 database of the computer device is used for the winding control data of the semi-automatic winding machine for battery cores. 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, a winding control method based on a semi-automatic winding machine for battery cores is implemented.

[0092] 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 steps of a winding control method based on a semi-automatic winding machine for a battery core are implemented.

[0093] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in 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 and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), 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).

[0094] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above.

[0095] The embodiments described above 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 aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions 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 winding control method based on a semi-automatic winding machine for a battery core, characterized in that: include: Analyze the battery core drawing to obtain the battery winding angle and the battery separator thickness, and calculate the single-layer bending curvature of each layer of the battery separator according to the battery winding angle and the battery separator thickness; Analyze the rotation angle of the winding needle of the corresponding diaphragm according to the single-layer bending curvature, and calculate the corner linear velocity of the winding core according to the rotation angle of the winding needle and the winding cycle of the corresponding diaphragm to obtain the corner linear velocity data; According to the corner linear velocity data, analyzing the speed change correlation between the winding speed of adjacent diaphragms and the corner linear velocity, and constructing a winding control model of the battery core according to the speed change correlation; The pole piece coverage data during the battery core winding process is obtained and input into the winding control model for core defect analysis. The winding speed of the corresponding diaphragm is adjusted according to the analysis results to obtain the core winding control data.

2. The winding control method based on the semi-automatic winding machine of the battery core according to claim 1 is characterized in that: The analyzing the battery core drawing to obtain the battery winding angle and the battery separator thickness, and calculating the single-layer bending curvature of each layer of the battery separator according to the battery winding angle and the battery separator thickness, specifically includes: The single-layer bending curvature of the battery separator is expressed by formula (1), which is as follows: Among them, κ n represents the single-layer bending curvature of the nth battery separator, represents the battery winding angle of the nth battery separator, d n Represents the battery separator thickness of the nth battery separator layer.

3. The winding control method based on the semi-automatic winding machine of the battery core according to claim 1 is characterized in that: The analysis of the winding needle rotation angle of the corresponding diaphragm according to the single-layer bending curvature, and the calculation of the core corner linear velocity according to the winding needle rotation angle and the winding cycle of the corresponding diaphragm to obtain the corner linear velocity data specifically includes: Obtaining the winding distance between the to-be-wound corner and the winding core of the winding machine, and analyzing the rotation angle of the winding needle of the corresponding diaphragm at the to-be-wound corner in combination with the single-layer bending curvature; The winding cycle of the corresponding separator is analyzed according to the number of winding layers of the battery separator, and the corner linear velocity of the winding core is calculated in combination with the rotation angle of the winding needle to obtain the corner linear velocity data.

4. The winding control method based on the semi-automatic winding machine for battery core according to claim 3 is characterized in that: The analysis of the winding cycle of the corresponding separator according to the number of winding layers of the battery separator and the calculation of the corner linear velocity of the winding core in combination with the winding needle rotation angle to obtain the corner linear velocity data specifically includes: The core corner linear velocity is calculated by formula (2), which is as follows: Among them, V m represents the core corner linear velocity, κ n represents the single-layer bending curvature of the nth battery separator. The layer level of the battery separator represents the winding period of the separator. m Indicates the winding distance between the mth winding corner and the winding machine core, L m It represents the length of the connecting line between the m-1th corner to be wound and the mth corner to be wound in the winding direction, which is at right angles to the extension line of the winding core; θ represents the rotation angle of the winding needle of the winding machine at the corner to be wound.

5. The winding control method based on the semi-automatic winding machine of the battery core according to claim 1, characterized in that: The obtaining of the pole piece coverage data during the battery core winding process and inputting it into the winding control model to perform core defect analysis, adjusting the winding speed of the corresponding diaphragm according to the analysis results, and obtaining the core winding control data specifically includes: Compare the pole piece coverage data with the preset winding parameters of each layer of battery separator in the model layer by layer, locate and analyze the pole piece defect position according to the comparison results, and obtain the winding core defect analysis data; According to the core defect analysis data, unwinding correction processing is performed on the pole piece defect position, and the diaphragm winding speed corresponding to the winding cycle is adjusted according to the correction result to obtain the core winding control data.

6. A winding control system based on a semi-automatic winding machine for a battery core, characterized in that: include: A data calculation module, used for analyzing the battery core drawing to obtain the battery winding angle and the battery separator thickness, and calculating the single-layer bending curvature of each layer of the battery separator according to the battery winding angle and the battery separator thickness; A winding control module, used for analyzing the rotation angle of the winding needle of the winding machine corresponding to the diaphragm according to the single-layer bending curvature, and calculating the corner linear velocity of the winding core according to the rotation angle of the winding needle and the winding cycle of the corresponding diaphragm to obtain corner linear velocity data; A model building module, used to analyze the speed change correlation relationship between the winding speed of adjacent diaphragms and the corner linear speed according to the corner linear speed data, and to build a winding control model of the battery core according to the speed change correlation relationship; The winding adjustment module is used to obtain the pole piece coverage data during the battery core winding process and input it into the winding control model to perform core defect analysis, adjust the winding speed of the corresponding diaphragm according to the analysis results, and obtain the core winding control data.

7. 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 winding control method based on the semi-automatic winding machine for battery cores are implemented as described in any one of claims 1 to 5.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the winding control method based on the semi-automatic winding machine for battery cores are implemented.

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