Film winding simulation method and system, electronic equipment and storage medium

Abstract

The invention discloses a thin film winding simulation method and system, electronic equipment and a storage medium, and the method comprises the steps: carrying out the simulation modeling of a winding needle initial section, and obtaining an initial section simulation model which comprises a positive pole piece, a negative pole piece, a diaphragm, a middle roller and a plurality of passing rollers; performing degree-of-freedom setting on the initial section simulation model, and further establishing a local coordinate system at the tail ends of the positive pole piece, the negative pole piece and the diaphragm; and pole piece tension and diaphragm tension are simulated based on the local coordinate system, and parameter setting is performed on the intermediate roller, so that the film winding process is simulated. The device can effectively simulate the film winding process, provides a visual quantitative scheme for winding research, and can be widely applied to the technical field of roll-to-roll conveying.

Description

Technical Field

[0001] The present application relates to the field of roll-to-roll conveying technology, and in particular to a film winding simulation method, system, electronic equipment and storage medium. Background Art

[0002] Roll-to-roll processing is a common process in industrial production. It is mainly used to roll materials into specific shapes or structures according to certain rules. It is widely used in many industries such as papermaking, textiles, and lithium battery manufacturing. In the roll-to-roll processing process, in order to ensure the processing quality and prevent abnormal conditions such as tearing caused by excessive tension during material winding, or poor winding alignment, it is very necessary to study the physical changes inside the material roll during the winding process. In actual production, post-detection is often used, and the wound product is manually disassembled and tested, and feedback is given to the front-end process to optimize the production process. This method is a destructive test, which is time-consuming, labor-intensive, and costly. It is also difficult to accurately know the physical changes during the winding process, and it is not directly and effectively helpful for process improvement. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a film winding simulation method, system, electronic equipment and storage medium, which can simulate the film winding process.

[0004] To achieve the above purpose, one aspect of an embodiment of the present application provides a film winding simulation method, comprising the following steps:

[0005] Simulating and modeling the starting section of the winding needle to obtain a starting section simulation model, wherein the starting section simulation model includes a positive electrode sheet, a negative electrode sheet, a separator, an intermediate roller, and a plurality of passing rollers;

[0006] Setting the degrees of freedom of the starting segment simulation model, and then establishing a local coordinate system at the ends of the positive electrode sheet, the negative electrode sheet and the diaphragm;

[0007] The pole piece tension and the diaphragm tension are simulated based on the local coordinate system, and the parameters of the intermediate roller are set to simulate the film winding process.

[0008] In some embodiments, the simulation modeling of the winding needle starting section to obtain the starting section simulation model specifically includes:

[0009] Determining that the widths of the positive electrode sheet, the negative electrode sheet, and the separator are all first preset widths;

[0010] Determining the thickness of the positive electrode plate to be a first preset thickness, determining the thickness of the negative electrode plate to be a second preset thickness, and determining the thickness of the separator to be a third preset thickness;

[0011] Determine the diameter of the intermediate roller as a first preset diameter, determine the diameter of each of the passing rollers as a second preset diameter, and determine the length of each of the passing rollers as a first preset length;

[0012] The positive electrode sheet is simulated according to the first preset width and the first preset thickness, the negative electrode sheet is simulated according to the first preset width and the second preset thickness, and the separator is simulated according to the first preset width and the third preset thickness;

[0013] The intermediate roller is simulated according to the first preset diameter, and each of the passing rollers is simulated according to the second preset diameter and the first preset length to obtain the starting section simulation model.

[0014] In some embodiments, the setting of the degrees of freedom of the starting segment simulation model specifically includes:

[0015] Setting the x-axis degree of freedom and the y-axis degree of freedom of the intermediate roller to zero;

[0016] Setting the x-axis degree of freedom, y-axis degree of freedom and z-axis degree of freedom of each of the rollers to zero;

[0017] The x-axis degree of freedom and the y-axis degree of freedom of the ends of the positive electrode sheet, the negative electrode sheet and the separator are all set to zero.

[0018] In some embodiments, the local coordinate system is established at the ends of the positive electrode sheet, the negative electrode sheet and the diaphragm, specifically:

[0019] The local coordinate system is established with the ends of the positive electrode sheet, the negative electrode sheet and the diaphragm as the origin, the direction parallel to the positive electrode sheet, the negative electrode sheet and the diaphragm as the x-axis, the direction perpendicular to the positive electrode sheet, the negative electrode sheet and the diaphragm as the y-axis, and the direction perpendicular to the x-axis and the y-axis as the z-axis.

[0020] In some embodiments, simulating the pole piece tension and the diaphragm tension based on the local coordinate system specifically includes:

[0021] Setting the magnitude of the tension of the positive electrode sheet and the negative electrode sheet to a first Newton, and setting the magnitude of the tension of the diaphragm to a second Newton;

[0022] The pole piece tension and the diaphragm tension are simulated by taking the origin of each local coordinate system as the tension force point and the direction opposite to the x-axis of each local coordinate system as the tension direction.

[0023] In some embodiments, the parameter setting of the intermediate roller is specifically as follows:

[0024] The maximum angular velocity of the intermediate roller during rotation is set to w=457.143 rad / s, and the total movement time is 0.2 s.

[0025] In some embodiments, the film winding simulation method further comprises:

[0026] The friction coefficient between the positive electrode sheet, the negative electrode sheet and the separator is set to 0.2.

[0027] To achieve the above object, another aspect of the embodiment of the present application provides a film winding simulation system, comprising:

[0028] A simulation modeling module is used to simulate and model the starting section of the winding needle to obtain a simulation model of the starting section, wherein the simulation model of the starting section includes a positive electrode sheet, a negative electrode sheet, a separator, an intermediate roller, and a plurality of rollers;

[0029] A coordinate system construction module, used to set the degrees of freedom of the starting segment simulation model, and then establish a local coordinate system at the ends of the positive electrode sheet, the negative electrode sheet and the diaphragm;

[0030] The winding simulation module is used to simulate the pole piece tension and the diaphragm tension based on the local coordinate system and set the parameters of the intermediate roller to simulate the film winding process.

[0031] To achieve the above-mentioned purpose, another aspect of an embodiment of the present application proposes an electronic device, which includes a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection and communication between the processor and the memory, and the program, when executed by the processor, realizes the film winding simulation method as described above.

[0032] To achieve the above-mentioned purpose, another aspect of an embodiment of the present application proposes a storage medium, which is a computer-readable storage medium used for computer-readable storage, and the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the film winding simulation method as described above.

[0033] The beneficial effects of the present invention are as follows: the film winding simulation method, system, electronic device and storage medium of the present invention first simulate and model the starting section of the winding needle to obtain a starting section simulation model, the starting section simulation model includes a positive pole piece, a negative pole piece, a diaphragm, an intermediate roller and a plurality of rollers, and then the starting section simulation model is set with degrees of freedom, and then a local coordinate system is established at the ends of the positive pole piece, the negative pole piece and the diaphragm, and finally the pole piece tension and the diaphragm tension are simulated based on the local coordinate system, and the parameters of the intermediate roller are set to simulate the film winding process. The present invention only intercepts the starting section of the winding needle for modeling and analysis, which can effectively simplify the simulation model, and establishes a local coordinate system at the ends of the truncated pole piece and the diaphragm, and simulates the tension based on the local coordinate system, which can effectively simulate the film winding process, and provide a visualized quantitative solution for winding research. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution in the embodiments of the present invention, the following introduction is made to the drawings required for use in the embodiments of the present invention. It should be understood that the drawings introduced below are only for the convenience of clearly describing some embodiments of the technical solution of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A flowchart of a film winding simulation method provided by an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of a starting segment simulation model provided by an embodiment of the present invention;

[0037] Figure 3 A schematic diagram of establishing a local coordinate system provided by an embodiment of the present invention;

[0038] Figure 4 A schematic diagram of a time operation curve of an intermediate roller provided in an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of stress change points of a pole piece and a diaphragm provided in an embodiment of the present invention;

[0040] Figure 6 A schematic diagram of stress changes at points taken from the inner layer to the outer layer of the positive electrode sheet when the movement time is 0.2s provided in an embodiment of the present invention;

[0041] Figure 7 A schematic diagram of stress changes at points on the negative electrode sheet from the inner layer to the outer layer when the movement time is 0.2s provided in an embodiment of the present invention;

[0042] Figure 8 A schematic structural diagram of a film winding simulation system provided by an embodiment of the present invention;

[0043] Fig. 9 A schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present invention;

[0044] Reference numerals: 01, middle roller; 02, passing roller; 101, positive electrode sheet; 102, negative electrode sheet; 103, upper separator; 104, lower separator. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0046] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0047] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0048] Roll-to-roll processing is a common process in industrial production. It is mainly used to roll materials into specific shapes or structures according to certain rules. It is widely used in many industries such as papermaking, textiles, and lithium battery manufacturing. In the roll-to-roll processing process, in order to ensure the processing quality and prevent abnormal conditions such as tearing caused by excessive tension during material winding, or poor winding alignment, it is very necessary to study the physical changes inside the material roll during the winding process. In actual production, post-detection is often used, and the wound product is manually disassembled and tested, and feedback is given to the front-end process to optimize the production process. This method is a destructive test, which is time-consuming, labor-intensive, and costly. It is also difficult to accurately know the physical changes during the winding process, and it is not directly and effectively helpful for process improvement.

[0049] To this end, an embodiment of the present invention proposes a film winding simulation method, firstly, the starting section of the winding needle is simulated and modeled to obtain a starting section simulation model, the starting section simulation model includes a positive pole piece, a negative pole piece, a diaphragm, an intermediate roller and a plurality of rollers, then the starting section simulation model is set with degrees of freedom, and then a local coordinate system is established at the ends of the positive pole piece, the negative pole piece and the diaphragm, and finally, the pole piece tension and the diaphragm tension are simulated based on the local coordinate system, and the parameters of the intermediate roller are set to simulate the film winding process. The present invention only intercepts the starting section of the winding needle for modeling and analysis, which can effectively simplify the simulation model, and establishes a local coordinate system at the ends of the truncated pole piece and the diaphragm, and simulates the tension based on the local coordinate system, which can effectively simulate the film winding process, and provide a visual quantitative solution for winding research.

[0050] Reference Figure 1 , Figure 1 The present invention provides a flow chart of the steps of a film winding simulation method. The present invention provides a film winding simulation method, which includes steps S101 to S103:

[0051] S101, simulate and model the starting section of the winding needle to obtain a starting section simulation model, wherein the starting section simulation model includes a positive electrode sheet 101, a negative electrode sheet 102, a separator, an intermediate roller 01, and a plurality of rollers 02;

[0052] In some optional embodiments, simulation modeling can be performed through mechanical design software Solidworks, which is a microcomputer version of parametric feature modeling software that can provide users with multiple functions such as three-dimensional modeling, assembly design, engineering drawing generation, simulation analysis, and rendering. According to the CAD engineering drawing, the positive electrode sheet 101, the negative electrode sheet 102, the separator, the intermediate roller 01, and the multiple rollers 02 are simulated and modeled in the software to obtain a simulation model of the winding needle starting section.

[0053] It should be noted that, in the embodiment of the present invention, only the starting section of the winding needle is intercepted for analysis and modeling when simulating the winding process, which can effectively simplify the simulation model and reduce the time cost and labor cost of simulating the film winding process.

[0054] As an optional implementation, the step of performing simulation modeling on the starting section of the winding needle to obtain the simulation model of the starting section can be specifically divided into the following steps S1011 to S1015:

[0055] S1011, determining that the widths of the positive electrode sheet 101, the negative electrode sheet 102, and the separator are all the first preset width;

[0056] S1012, determining the thickness of the positive electrode sheet 101 to be the first preset thickness, determining the thickness of the negative electrode sheet 102 to be the second preset thickness, and determining the thickness of the separator to be the third preset thickness;

[0057] S1013, determining that the diameter of the middle roller 01 is the first preset diameter, determining that the diameter of each passing roller 02 is the second preset diameter, and determining that the length of each passing roller 02 is the first preset length;

[0058] S1014, simulating the positive electrode sheet 101 according to the first preset width and the first preset thickness, simulating the negative electrode sheet 102 according to the first preset width and the second preset thickness, and simulating the separator according to the first preset width and the third preset thickness;

[0059] S1015, simulating the intermediate roller 01 according to the first preset diameter, simulating each of the rollers 02 according to the second preset diameter and the first preset length, and obtaining a simulation model of the starting section.

[0060] In some optional embodiments, such as Figure 2 The schematic diagram of the simulation model of the starting section is shown. The diaphragm includes an upper diaphragm 103 and a lower diaphragm 104. First, the engineering design requirements and standards need to be determined. The following Table 1 shows the engineering design requirements of the positive electrode sheet 101, the negative electrode sheet 102 and the diaphragm in the embodiment of the present invention. The simulation dimensions and sizes of the positive electrode sheet 101, the negative electrode sheet 102, the diaphragm, the intermediate roller 01 and the multiple rollers 02 are determined in accordance with the engineering design requirements. For example, referring to Table 1, the diameter of the intermediate roller 01 can be set to 3.5 mm, the diameter of the other rollers 02 can be set to 10 mm, and the length of the roller 02 can be set to 220 mm; the width of the positive and negative electrode sheets is 200 mm, and the thickness of the positive and negative electrode sheets is 0.17 mm and 0.13 mm respectively; the width of the diaphragm is 200 mm, and the thickness of the diaphragm is 0.018 mm. Furthermore, other simulation parameters of the electrode and the diaphragm can be set with reference to Table 1, for example, the number of hanging axis of the positive electrode 101, the negative electrode 102 and the diaphragm is set to 2, the maximum outer diameter of the material of the positive electrode 101 and the negative electrode 102 is set to 800φ, the maximum outer diameter of the material of the diaphragm is set to 350φ, the core inner diameter of the positive electrode 101 and the negative electrode 102 is set to 152.4φ, the core inner diameter of the diaphragm is set to 76.2φ, etc.

[0061] Table 1

[0062] Number of hanging scrolls W Width(mm) T thickness (μ) Length(mm) φP Maximum outer diameter of material φC core inner diameter Positive electrode 2 70～220 80～170 2500～17000 φ800 φ152.4 Negative electrode 2 70～220 60～130 2500～17000 φ800 φ152.4 Diaphragm 2 70～220 12～18 2500～17000 φ350 φ76.2

[0063] It can be understood that the first preset width, the first preset thickness, the second preset thickness, the third preset thickness, the first preset diameter, the second preset diameter and the first preset length can be set according to actual engineering requirements. For example, according to the engineering requirements that the width of the pole piece and the diaphragm should be set at 70-220 mm in Table 1, the first preset width can be 200 mm, etc.; according to the engineering requirements that the thickness of the positive pole piece 101 should be set at 80-170 μ in Table 1, the first preset thickness can be 0.17 mm, etc.; according to the engineering requirements that the thickness of the negative pole piece 102 should be set at 60-130 μ in Table 1, the second preset width can be 0.13 mm, etc.; according to the engineering requirements that the thickness of the diaphragm should be set at 12-18 μ in Table 1, the third preset width can be 0.018 mm, etc.; the first preset diameter can be 3.5 mm, 3.0 mm, etc.; the second preset diameter can be 10 mm, 12 mm, etc.; the first preset length can be 220 mm, 200 mm, etc.

[0064] S102, setting the degrees of freedom of the simulation model of the starting section, and then establishing a local coordinate system at the ends of the positive electrode sheet 101, the negative electrode sheet 102 and the diaphragm;

[0065] As an optional implementation, the step of setting the degree of freedom of the starting segment simulation model can be specifically divided into the following steps S1021 to S1023:

[0066] S1021, setting the x-axis degree of freedom and the y-axis degree of freedom of the intermediate roller 01 to zero;

[0067] S1022, setting the x-axis degree of freedom, y-axis degree of freedom and z-axis degree of freedom of each roller 02 to zero.

[0068] S1023, setting the x-axis degree of freedom and the y-axis degree of freedom of the ends of the positive electrode sheet 101, the negative electrode sheet 102 and the separator to be zero;

[0069] Specifically, in finite element simulation, degrees of freedom refer to the number of parameters or variables that can be changed independently in a system. By setting different degrees of freedom constraints, various constraints on the material during the actual winding process can be simulated. In the embodiment of the present invention, the overall gravity direction is set to the -y direction, and the freedom of the middle roller 01 is set to Fix1 (only the z-axis rotation freedom is released, and the freedom in other directions is fully constrained); the freedom of the remaining rollers 02 (ABDE) is Fix2 (the freedom in the three directions of x, y, and z is fully constrained); the freedom Fix3 is set for the positive electrode sheet 101, the negative electrode sheet 102 and the end of the diaphragm (constraining the freedom of rotation in the x and y directions).

[0070] Furthermore, it is necessary to assign material properties to the pole piece, diaphragm, intermediate roller 01 and each roller 02. The material parameter table of each structure is shown in Table 2 below.

[0071] Table 2

[0072] Material structure <![CDATA[Density (kg / m 3 )]]> <![CDATA[Modulus of elasticity (N / mm 2 )]]> Poisson's ratio AL6061 Pole piece 2700 6.90E+4 0.33 PP Diaphragm 890 8.96E+2 0.41 S45C Roller 7890 2.09E+5 0.269

[0073] As an optional implementation, the step of establishing a local coordinate system at the ends of the positive electrode sheet 101, the negative electrode sheet 102 and the separator can be specifically divided into the following steps S1024:

[0074] S1024. Establish a local coordinate system with the positive electrode sheet 101, the negative electrode sheet 102 and the end of the diaphragm as the origin, the direction parallel to the positive electrode sheet 101, the negative electrode sheet 102 and the diaphragm as the x-axis, the direction perpendicular to the positive electrode sheet 101, the negative electrode sheet 102 and the diaphragm as the y-axis, and the direction perpendicular to the x-axis and the y-axis as the z-axis.

[0075] Specifically, Figure 3 The diagram shows a schematic diagram of establishing a local coordinate system. Different tensions need to be applied to the pole piece and the diaphragm to simulate the film winding process. By establishing local coordinate systems respectively, the stress state and direction of each pole piece and film can be better described. Therefore, in the embodiment of the present invention, the ends of the positive pole piece 101, the negative pole piece 102, the upper diaphragm 103 and the lower diaphragm 104 are taken as the origin, the direction parallel to the positive pole piece 101, the negative pole piece 102 and the diaphragm is taken as the x-axis, the direction perpendicular to the positive pole piece 101, the negative pole piece 102 and the diaphragm is taken as the y-axis, and the direction perpendicular to the x-axis and the y-axis is taken as the z-axis to establish a local coordinate system.

[0076] S103, simulating the pole piece tension and the diaphragm tension based on the local coordinate system, and setting parameters for the intermediate roller 01, so as to simulate the film winding process;

[0077] As an optional implementation, the step of simulating the pole piece tension and the diaphragm tension based on the local coordinate system can be specifically divided into the following steps S1031 and S1032:

[0078] S1031, setting the tension of the positive electrode sheet 101 and the negative electrode sheet 102 to a first Newton, and setting the tension of the diaphragm to a second Newton;

[0079] S1032. Taking the origin of each local coordinate system as the tension force point and the direction opposite to the x-axis of each local coordinate system as the tension direction, simulate the pole piece tension and the diaphragm tension.

[0080] As an optional implementation, the step of setting parameters for the intermediate roller 01 can be specifically divided into the following steps S1033:

[0081] S1033, setting the maximum angular velocity of the intermediate roller 01 during rotation to w=457.143 rad / s, and the total movement time to 0.2 s.

[0082] Specifically, the working condition analysis of the film winding process in advance shows that when the film is stationary, the pole piece and the diaphragm are only affected by gravity, the tension of the positive pole piece 101 and the negative pole piece 102 is 100N, and the tension of the upper diaphragm 103 and the lower diaphragm 104 is 50N; when the film rotates, its total rotation time is 0.2s, and the maximum angular velocity is 457.143rad / s, as shown in Table 3 below, which is a schematic diagram of the movement time and angular velocity of the intermediate roller. Figure 4 The figure shows a time operation curve of the intermediate roller. Therefore, the tension of the positive electrode sheet 101 and the negative electrode sheet 102 can be set to F1 = 100N, the tension of the upper diaphragm 103 and the lower diaphragm 104 can be set to F2 = 50N, and the tension direction can be selected from the local coordinate system and set to the reverse tension of the x-axis to simulate the tension of the electrode sheet and the diaphragm through the reverse tension.

[0083] It should be noted that the first Newton, the second Newton, the maximum angular velocity of the intermediate roller 01 during rotation, and the total movement time can be set according to actual working conditions, and are not limited thereto in the embodiments of the present invention.

[0084] Table 3

[0085] Time(s) Angular velocity (rad / s) 0 0 0.1 171.43 0.2 457.143

[0086] As an optional embodiment, the film winding simulation method further includes the following steps S1034:

[0087] S1034, setting the friction coefficient between the positive electrode sheet 101, the negative electrode sheet 102 and the separator to 0.2.

[0088] Specifically, considering the contact force between the pole piece and the diaphragm, the pole piece and the edge of the diaphragm are set to be bound to the intermediate roller 01, and the friction contact with a friction coefficient of 0.2 is set. The above steps can simulate the force changes during the film winding process.

[0089] Furthermore, the stress changes during winding of the pole piece under this working condition can be analyzed, and the stress conditions of the pole piece and the diaphragm during the winding process can be evaluated by using stress, such as Figure 5 The figure shows the stress change points of the pole piece and the diaphragm. Figure 6 The figure shows the stress change of the positive electrode from the inner layer to the outer layer when the movement time is 0.2s. Figure 7 The figure shows the stress change of the negative electrode from the inner layer to the outer layer when the movement time is 0.2s. Figure 6 and Figure 7It can be seen that as the winding diameter increases, the stress of the pole piece and the diaphragm will gradually decrease, but the decreasing trend should be smooth and controllable. According to different winding processes, appropriate tension and line speed curves can be further designed to ensure that the stress of the pole piece and the diaphragm does not jump as the winding diameter increases.

[0090] The above is an explanation of the film winding simulation method of the embodiment of the present invention. It can be recognized that, compared with the winding process research method in the prior art, the embodiment of the present invention only intercepts the starting section of the winding needle for modeling and analysis when simulating the winding process, which can effectively simplify the simulation model, and establish a local coordinate system at the end of the truncated pole piece and diaphragm, set the reverse pulling force in the same direction as the film movement to simulate the tension, set the pole piece and the diaphragm head end and the intermediate roller as a binding connection, and set the pole piece and the diaphragm to transmit the contact pressure, which can effectively simulate the film winding process and provide a visual quantitative solution for winding research.

[0091] Reference Figure 8 The embodiment of the present invention further provides a film winding simulation system, comprising:

[0092] A simulation modeling module is used to simulate and model the starting section of the winding needle to obtain a simulation model of the starting section, wherein the simulation model of the starting section includes a positive electrode sheet, a negative electrode sheet, a separator, an intermediate roller, and a plurality of rollers;

[0093] A coordinate system construction module is used to set the degrees of freedom of the starting section simulation model, and then establish a local coordinate system at the ends of the positive electrode sheet, the negative electrode sheet and the diaphragm;

[0094] The winding simulation module is used to simulate the pole piece tension and diaphragm tension based on the local coordinate system and set the parameters of the intermediate roller to simulate the film winding process.

[0095] The contents of the above-mentioned film winding simulation method embodiment are all applicable to the present film winding simulation system embodiment. The functions specifically implemented by the present film winding simulation system embodiment are the same as those of the above-mentioned film winding simulation method embodiment, and the beneficial effects achieved are also the same as those achieved by the above-mentioned film winding simulation method embodiment.

[0096] The embodiment of the present invention further provides an electronic device, the electronic device comprising: a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection and communication between the processor and the memory, and the program is executed by the processor to realize the above-mentioned film winding simulation method. The electronic device can be any intelligent terminal including a tablet computer, a car computer, etc.

[0097] like Fig. 9 FIG. 1 is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present invention, referring to FIG. Fig. 9, an embodiment of the present invention provides an electronic device, including:

[0098] The processor 1001 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present invention.

[0099] The memory 1002 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device or a random access memory (RAM). The memory 1002 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 1002, and the processor 1001 is used to call and execute the film winding simulation method of the embodiment of the present invention;

[0100] Input / output interface 1003, used to implement information input and output;

[0101] The communication interface 1004 is used to realize the communication interaction between the device and other devices. The communication can be realized through a wired manner (such as USB, network cable, etc.) or a wireless manner (such as mobile network, WIFI, Bluetooth, etc.);

[0102] A bus 1005 , which transmits information between various components of the device (e.g., the processor 1001 , the memory 1002 , the input / output interface 1003 , and the communication interface 1004 );

[0103] The processor 1001 , the memory 1002 , the input / output interface 1003 and the communication interface 1004 are connected to each other in communication within the device via the bus 1005 .

[0104] An embodiment of the present invention further provides a storage medium, which is a computer-readable storage medium used for computer-readable storage. The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the above-mentioned film winding simulation method.

[0105] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0106] The embodiment of the present invention also discloses a computer program product or a computer program, wherein the computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor of a computer device can read the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes Figure 1 The method shown.

[0107] In some selectable embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the above-mentioned boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the present invention is provided by way of example, for the purpose of providing a more comprehensive understanding of technology. The disclosed method is not limited to the operation and logic flow presented herein. Selectable embodiments are expected, wherein the order of various operations is changed and the sub-operation of a part for which is described as a larger operation is performed independently.

[0108] In addition, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise specified to the contrary, one or more of the above-mentioned functions and / or features can be integrated into a single physical device and / or software module, or one or more functions and / or features can be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding the present invention. More specifically, in view of the properties, functions and internal relationships of the various functional modules in the device disclosed herein, the actual implementation of the module will be understood within the conventional skills of the engineer. Therefore, those skilled in the art can implement the present invention set forth in the claims without excessive experimentation using ordinary techniques. It is also understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present invention, which is determined by the full scope of the appended claims and their equivalents.

[0109] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the above methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0110] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0111] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0112] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0113] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A film winding simulation method, characterized in that: The following steps are involved: Simulating and modeling the starting section of the winding needle to obtain a starting section simulation model, wherein the starting section simulation model includes a positive electrode sheet, a negative electrode sheet, a separator, an intermediate roller, and a plurality of passing rollers; Setting the degrees of freedom of the starting segment simulation model, and then establishing a local coordinate system at the ends of the positive electrode sheet, the negative electrode sheet and the diaphragm; The pole piece tension and the diaphragm tension are simulated based on the local coordinate system, and the parameters of the intermediate roller are set to simulate the film winding process.

2. A film winding simulation method according to claim 1, characterized in that: The simulation modeling of the starting section of the needle winding is performed to obtain the starting section simulation model, which specifically includes: Determining that the widths of the positive electrode sheet, the negative electrode sheet, and the separator are all first preset widths; Determining the thickness of the positive electrode plate to be a first preset thickness, determining the thickness of the negative electrode plate to be a second preset thickness, and determining the thickness of the separator to be a third preset thickness; Determine the diameter of the intermediate roller as a first preset diameter, determine the diameter of each of the passing rollers as a second preset diameter, and determine the length of each of the passing rollers as a first preset length; The positive electrode sheet is simulated according to the first preset width and the first preset thickness, the negative electrode sheet is simulated according to the first preset width and the second preset thickness, and the separator is simulated according to the first preset width and the third preset thickness; The intermediate roller is simulated according to the first preset diameter, and each of the passing rollers is simulated according to the second preset diameter and the first preset length to obtain the starting section simulation model.

3. A film winding simulation method according to claim 1, characterized in that: The setting of the degrees of freedom of the starting segment simulation model specifically includes: Setting the x-axis degree of freedom and the y-axis degree of freedom of the intermediate roller to zero; Setting the x-axis degree of freedom, y-axis degree of freedom and z-axis degree of freedom of each of the rollers to zero; The x-axis degree of freedom and the y-axis degree of freedom of the ends of the positive electrode sheet, the negative electrode sheet and the separator are all set to zero.

4. A film winding simulation method according to claim 1, characterized in that: The local coordinate system is established at the ends of the positive electrode sheet, the negative electrode sheet and the diaphragm, specifically: The local coordinate system is established with the ends of the positive electrode sheet, the negative electrode sheet and the diaphragm as the origin, the direction parallel to the positive electrode sheet, the negative electrode sheet and the diaphragm as the x-axis, the direction perpendicular to the positive electrode sheet, the negative electrode sheet and the diaphragm as the y-axis, and the direction perpendicular to the x-axis and the y-axis as the z-axis.

5. A film winding simulation method according to claim 1, characterized in that: The simulating of the pole piece tension and the diaphragm tension based on the local coordinate system specifically includes: Setting the magnitude of the tension of the positive electrode sheet and the negative electrode sheet to a first Newton, and setting the magnitude of the tension of the diaphragm to a second Newton; The pole piece tension and the diaphragm tension are simulated by taking the origin of each local coordinate system as the tension force point and the direction opposite to the x-axis of each local coordinate system as the tension direction.

6. A film winding simulation method according to claim 1, characterized in that: The parameter setting of the intermediate roller is specifically as follows: The maximum angular velocity of the intermediate roller during rotation is set to w=457.143 rad / s, and the total movement time is 0.2 s.

7. A film winding simulation method according to claim 1, characterized in that: The film winding simulation method further comprises: The friction coefficient between the positive electrode sheet, the negative electrode sheet and the separator is set to 0.

2.

8. A film winding simulation system, characterized in that: include: A simulation modeling module is used to simulate and model the starting section of the winding needle to obtain a simulation model of the starting section, wherein the simulation model of the starting section includes a positive electrode sheet, a negative electrode sheet, a separator, an intermediate roller, and a plurality of rollers; A coordinate system construction module, used to set the degrees of freedom of the starting segment simulation model, and then establish a local coordinate system at the ends of the positive electrode sheet, the negative electrode sheet and the diaphragm; The winding simulation module is used to simulate the pole piece tension and the diaphragm tension based on the local coordinate system and set the parameters of the intermediate roller to simulate the film winding process.

9. An electronic device, characterized in that: The electronic device includes a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for realizing connection and communication between the processor and the memory. When the program is executed by the processor, the steps of the film winding simulation method as described in any one of claims 1 to 7 are realized.

10. A storage medium, the storage medium being a computer-readable storage medium, used for computer-readable storage, characterized in that: The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps of the film winding simulation method according to any one of claims 1 to 7.

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