Diaphragm buffer cam curve collecting and fitting device and using method thereof

Abstract

The invention relates to a diaphragm buffer cam curve collecting and fitting device and a using method thereof. The diaphragm buffer cam curve acquisition fitting device comprises an unwinding table, a transverse moving table and a lamination table, the three tables are all independent platforms and are located on the same vertical plane, and the transverse moving table and the lamination table are sequentially arranged at the lower part of the unwinding table; the using method comprises the following steps: the diaphragm transverse moving mechanism in the transverse moving table moves left and right to alternately cover positive and negative pole pieces with diaphragms; the diaphragm transverse moving mechanism and the diaphragm buffering mechanism move synchronously, the diaphragm stretching amount is absorbed by the diaphragm buffering mechanism, when the deformation amount of the absorbed diaphragm reaches a certain degree, the diaphragm unwinding mechanism unwinds the diaphragm, and the diaphragm stretching amount absorbed by the diaphragm buffering mechanism is recovered. According to the diaphragm buffer cam curve collecting and fitting device and the using method thereof, the lamination precision and the winding efficiency are effectively improved, the cam curve can be automatically calculated in a curve fitting mode, and the debugging and model changing efficiency is obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery separator unwinding, and particularly relates to a separator buffer cam curve acquisition and fitting device and a using method thereof. Background Art

[0002] Traditional Z-fold separator unwinding has two methods: the gravity roller method and the method of unwinding in cooperation with a separator buffer mechanism. Both of these unwinding methods calculate the cam curve of the separator buffer mechanism through modeling calculation, and then give this curve to the separator buffer mechanism. During the lamination process, the separator buffer shaft moves together with the separator unwinding and separator lateral movement to eliminate the separator tension jitter during high-speed lamination and ensure the separator alignment during lamination.

[0003] Chinese Patent CN116845371A (Publication Date: October 3, 2023) discloses a separator unwinding cam curve fitting device and a using method thereof. This patent fits the cam curve through the displacement distance of the separator lateral movement mechanism and the length change of the separator, and synchronously controls the separator lateral movement amount and the separator buffer amount to improve the stability and high speed of separator unwinding. The provided device solves the problems of large separator tension fluctuation and low separator lamination accuracy during the existing separator unwinding process, but this patent lacks research on the cam curve.

[0004] Chinese Patent CN114229564A (Publication Date: March 25, 2022) discloses a battery cell separator unwinding process and a separator unwinding device thereof. The process includes the following steps: S1, unwinding; S2, separator tension adjustment; S3, deviation correction; S4, separator buffering; S5, cyclic film pulling. The device includes: a material roll, a swing rod mechanism, a deviation correction mechanism, a buffer mechanism, double rollers and a film pulling roller. A strip-shaped separator is wound on the material roll. Although this application achieves a series of technical effects such as separator tension adjustment and position deviation correction, the technical means for achieving this effect are not fully disclosed in the technical solution provided by this application.

[0005] Although there are technical solutions in the prior art to improve the stability of separator tension and improve lamination accuracy and efficiency, the specific technical solutions are not fully disclosed. Therefore, it is necessary to provide a separator buffer cam curve acquisition and fitting device and a using method thereof to fully disclose the technical solution for the separator buffer device to solve the problems of large separator tension fluctuation and low separator lamination accuracy during the separator unwinding process. Summary of the Invention

[0006] The purpose of the present invention is to provide a separator buffer cam curve acquisition and fitting device and a using method thereof to solve the problems of large separator tension fluctuation and low separator lamination accuracy during the separator unwinding process.

[0007] A diaphragm buffer cam curve acquisition and fitting device, characterized in that it includes: an unwinding table, a transverse moving table, and a laminating table; the unwinding table, the transverse moving table, and the laminating table are all independent platforms; the unwinding table, the transverse moving table, and the laminating table are located in the same vertical plane; the transverse moving table is below the unwinding table; the laminating table is below the transverse moving table.

[0008] Further, the unwinding table includes a diaphragm unwinding mechanism, a diaphragm tension mechanism, a diaphragm buffer mechanism, and a diaphragm fixing pinch roll;

[0009] The diaphragm unwinding mechanism, the diaphragm tension mechanism, the diaphragm buffer mechanism, and the diaphragm fixing pinch roll are on the same side of the unwinding table;

[0010] The diaphragm unwinding mechanism and the diaphragm buffer mechanism are below the diaphragm tension mechanism; the diaphragm unwinding mechanism is on the left side of the diaphragm buffer mechanism;

[0011] There are several guide rollers between the diaphragm unwinding mechanism and the diaphragm tension mechanism; there are several guide rollers between the diaphragm tension mechanism and the diaphragm buffer mechanism.

[0012] Further, the transverse moving table includes a diaphragm transverse moving mechanism, a diaphragm transverse moving upper pinch roll, and a diaphragm transverse moving lower pinch roll; one side of the transverse moving table is the diaphragm transverse moving mechanism, and the other side is the diaphragm transverse moving upper pinch roll and the diaphragm transverse moving lower pinch roll; the diaphragm transverse moving mechanism is perpendicular to the transverse moving table; the diaphragm transverse moving upper pinch roll is above the diaphragm transverse moving lower pinch roll; there are several guide rollers between the diaphragm transverse moving upper pinch roll and the diaphragm transverse moving lower pinch roll.

[0013] Further, the laminating table includes a laminating table negative U clip and a laminating table positive U clip; the laminating table negative U clip and the laminating table positive U clip are in the same plane; the laminating table negative U clip is on the side of the laminating table close to the diaphragm transverse moving lower pinch roll, and the laminating table positive U clip is on the other side of the laminating table.

[0014] Further, the laminating table negative U clip is closely attached to the laminating table, and there is a gap between the laminating table positive U clip and the laminating table.

[0015] Further, a usage method of a diaphragm buffer cam curve acquisition and fitting device is characterized in that it includes the following steps:

[0016] Step S1: The diaphragm unwinding mechanism remains stationary; the diaphragm transverse moving mechanism moves, and the diaphragm buffer mechanism moves synchronously with the diaphragm transverse moving mechanism;

[0017] Step S2: Record the motor position of the diaphragm buffer mechanism;

[0018] Step S3: Use a fitting algorithm to fit the acquisition curve equation of the diaphragm buffer mechanism, generate a cam curve of the diaphragm buffer mechanism with any number of points using this equation, and give this curve to the diaphragm buffer mechanism;

[0019] Step S4: Record the position value x of the diaphragm buffer mechanism's movement;

[0020] Step S5: Fit the position equation y of the diaphragm buffer mechanism;

[0021] Step S6: Generate the cam curve of the diaphragm buffer mechanism with any number of points.

[0022] Furthermore, in step S1, when the diaphragm transverse movement mechanism is at the positive electrode position, the positive U-clamp of the stacking table fixes the diaphragm; when the diaphragm transverse movement mechanism is at the negative electrode position, the negative U-clamp of the stacking table fixes the diaphragm; the actions of the diaphragm transverse movement mechanism and the diaphragm buffer mechanism are synchronized, and the diaphragm expansion and contraction caused by the movement of the diaphragm transverse movement mechanism are absorbed by the diaphragm buffer mechanism.

[0023] Furthermore, when the diaphragm expansion and contraction absorbed by the diaphragm buffer mechanism reaches a certain level, the diaphragm unwinding mechanism unwinds the diaphragm, and the diaphragm expansion and contraction absorbed by the diaphragm buffer mechanism is restored to ensure that the diaphragm expansion and contraction can be absorbed again when the diaphragm transverse movement mechanism moves next time.

[0024] Furthermore, the movement in step S1 includes two situations: moving from the positive electrode to the negative electrode and moving from the negative electrode to the positive electrode.

[0025] Furthermore, the position equation in step S5 is:

[0026] y = a0 + a1*cos(x*w) + b1*sin(x*w) + a2*cos(2*x*w) + b2*sin(2*x*w) + a3*cos(3*x*w) + b3*sin(3*x*w) + a4*cos(4*x*w) + b4*sin(4*x*w) + a5*cos(5*x*w) + b5*sin(5*x*w) + a6*cos(6*x*w) + b6*sin(6*x*w) + a7*cos(7*x*w) + b7*sin(7*x*w) + a8*cos(8*x*w) + b8*sin(8*x*w)

[0027] where x is the position value; y, w, a0, a1, a2, a3, a4, a5, a6, a7, a8, b1, b2, b3, b4, b5, b6, b7, b8 are all coefficients calculated by fitting.

[0028] Compared with the prior art, the advantages and effects of this application are as follows:

[0029] 1. The present application provides a diaphragm buffer cam curve acquisition and fitting device. By means of the layout of the diaphragm tension mechanism, diaphragm transverse movement mechanism and diaphragm buffer mechanism, the diaphragm buffer mechanism actively absorbs the diaphragm expansion and contraction during movement, ensuring that the diaphragm tension does not cause too much fluctuation and improving the stability of the diaphragm tension. At the same time, the improvement of the diaphragm tension stability can ensure the improvement of the diaphragm alignment and the increase of the lamination movement speed, effectively improving the lamination accuracy and winding efficiency.

[0030] 2. The present application provides a method for using a diaphragm buffer cam curve acquisition and fitting device. Cam curves can be automatically calculated for various sizes of pole pieces by collecting data to form fitting curves, significantly improving the debugging and tool change efficiency.

[0031] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following takes the preferred embodiments of the present application and combines with the drawings to describe in detail as follows.

[0032] Those skilled in the art will understand the above and other purposes, advantages and features of the present application more clearly according to the following detailed description of the specific embodiments of the present application in conjunction with the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0034] Among them:

[0035] Figure 1 is a design drawing of a diaphragm buffer cam curve acquisition and fitting device provided by the present application;

[0036] Figure 2 is a comparison diagram of the fitting curve and the original collected data;

[0037] Reference numerals: 1-unwinding table; 101-diaphragm unwinding mechanism; 102-diaphragm tension mechanism; 103-diaphragm buffer mechanism; 104-diaphragm fixing pinch roll; 2-transverse movement table; 201-diaphragm transverse movement mechanism; 202-upper diaphragm transverse movement pinch roll; 203-lower diaphragm transverse movement pinch roll; 3-lamination table; 301-negative U clamp of the lamination table; 302-positive U clamp of the lamination table. Detailed implementation mode

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. In the following description, specific details such as specific configurations and components are provided only to assist in a comprehensive understanding of the embodiments of the present application. Therefore, those skilled in the art should clearly understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of known functions and configurations are omitted for clarity and conciseness in the embodiments.

[0039] It should be understood that the term "one embodiment" or "this embodiment" mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Therefore, the appearances of the term "one embodiment" or "this embodiment" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner.

[0040] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and in itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0041] The term "and / or" in this document is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, B exists alone, and both A and B exist simultaneously. The term " / and" in this document is a description of another association object relationship, indicating that two relationships can exist. For example, A / and B can represent: A exists alone, and both A and B exist. In addition, the character " / " in this document generally indicates that the associated objects before and after are in an "or" relationship.

[0042] The term "at least one" in this document is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, at least one of A and B can represent: A exists alone, both A and B exist simultaneously, and B exists alone.

[0043] It should also be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising", or any other variation thereof is intended to cover a non-exclusive inclusion.

[0044] Embodiment 1

[0045] This embodiment introduces a diaphragm buffer cam curve acquisition and fitting device. Please refer to Figure 1 , which includes: an unwinding table 1, a transverse movement table 2, and a laminating table 3; the unwinding table 1, the transverse movement table 2, and the laminating table 3 are all independent platforms; the unwinding table 1, the transverse movement table 2, and the laminating table 3 are located in the same vertical plane; the transverse movement table 2 is below the unwinding table 1; the laminating table 3 is below the transverse movement table 2.

[0046] Preferably, the unwinding table 1 includes a diaphragm unwinding mechanism 101, a diaphragm tension mechanism 102, a diaphragm buffer mechanism 103, and a diaphragm fixing pinch roller 104;

[0047] The diaphragm unwinding mechanism 101, the diaphragm tension mechanism 102, the diaphragm buffer mechanism 103, and the diaphragm fixing pinch roller 104 are on the same side of the unwinding table 1;

[0048] The diaphragm unwinding mechanism 101 and the diaphragm buffer mechanism 103 are below the diaphragm tension mechanism 102; the diaphragm unwinding mechanism 101 is on the left side of the diaphragm buffer mechanism 103;

[0049] There are several guide rollers between the diaphragm unwinding mechanism 101 and the diaphragm tension mechanism 102; there are several guide rollers between the diaphragm tension mechanism 102 and the diaphragm buffer mechanism 103.

[0050] Preferably, the transverse movement table 2 includes a diaphragm transverse movement mechanism 201, a diaphragm transverse movement upper pinch roller 202, and a diaphragm transverse movement lower pinch roller 203; one side of the transverse movement table 2 is the diaphragm transverse movement mechanism 201, and the other side is the diaphragm transverse movement upper pinch roller 202 and the diaphragm transverse movement lower pinch roller 203; the diaphragm transverse movement mechanism 201 is perpendicular to the transverse movement table 2; the diaphragm transverse movement upper pinch roller 202 is above the diaphragm transverse movement lower pinch roller 203; there are several guide rollers between the diaphragm transverse movement upper pinch roller 202 and the diaphragm transverse movement lower pinch roller 203.

[0051] Preferably, the laminating table 3 includes a laminating table negative U clamp 301 and a laminating table positive U clamp 302; the laminating table negative U clamp 301 and the laminating table positive U clamp 302 are in the same plane; the laminating table negative U clamp 301 is on the side of the laminating table 3 close to the diaphragm transverse movement lower pinch roller 203, and the laminating table positive U clamp 302 is on the other side of the laminating table 3.

[0052] Preferably, the laminating table negative U clamp 301 is in close contact with the laminating table 3, and there is a gap between the laminating table positive U clamp 302 and the laminating table 3.

[0053] The technical effects achieved in this embodiment are as follows: A diaphragm buffer cam curve acquisition and fitting device provided by the present application uses the layout of the diaphragm tension mechanism, diaphragm transverse movement mechanism, and diaphragm buffer mechanism to enable the diaphragm buffer mechanism to actively absorb the diaphragm expansion and contraction amount during the movement, ensuring that the diaphragm tension does not cause too much fluctuation and improving the stability of the diaphragm tension; at the same time, the improvement of the diaphragm tension stability can ensure the improvement of the diaphragm alignment degree and the lamination speed, effectively improving the lamination accuracy and winding efficiency.

[0054] Embodiment 2

[0055] Based on Embodiment 1, this embodiment studies a usage method of a diaphragm buffer cam curve acquisition and fitting device, including the following steps:

[0056] Step S1: The diaphragm unwinding mechanism 101 remains stationary; the diaphragm transverse movement mechanism 201 moves, and the diaphragm buffer mechanism 103 moves synchronously with the diaphragm transverse movement mechanism 201;

[0057] Step S2: Record the motor position of the diaphragm buffer mechanism 103;

[0058] Step S3: Use a fitting algorithm to fit the acquisition curve equation of the diaphragm buffer mechanism 103, generate a cam curve of the diaphragm buffer mechanism 103 with any number of points using this equation, and give this curve to the diaphragm buffer mechanism 103;

[0059] Step S4: Record the position value x of the movement of the diaphragm buffer mechanism 103;

[0060] Step S5: Fit the position equation y of the diaphragm buffer mechanism 103;

[0061] Step S6: Generate a cam curve of the diaphragm buffer mechanism with any number of points.

[0062] Preferably, in step S1, when the diaphragm transverse movement mechanism 201 is in the positive position, the positive U-clamp 302 of the lamination table fixes the diaphragm; when the diaphragm transverse movement mechanism 201 is in the negative position, the negative U-clamp 301 of the lamination table fixes the diaphragm; the actions of the diaphragm transverse movement mechanism 201 and the diaphragm buffer mechanism 103 are synchronized, and the diaphragm expansion and contraction amount caused by the movement of the diaphragm transverse movement mechanism 201 is absorbed by the diaphragm buffer mechanism 103.

[0063] Preferably, when the diaphragm expansion and contraction amount absorbed by the diaphragm buffer mechanism 103 reaches a certain level, the diaphragm unwinding mechanism 101 performs diaphragm unwinding, and the diaphragm expansion and contraction amount absorbed by the diaphragm buffer mechanism 103 is restored to ensure that the diaphragm expansion and contraction amount can be absorbed again when the diaphragm transverse movement mechanism 201 moves next time.

[0064] Preferably, the movement in step S1 includes two cases: moving from the positive pole to the negative pole and moving from the negative pole to the positive pole.

[0065] Preferably, the position equation in step S5 is as follows:

[0066] y = a0 + a1*cos(x*w) + b1*sin(x*w) + a2*cos(2*x*w) + b2*sin(2*x*w) + a3*cos(3*x*w) + b3*sin(3*x*w) + a4*cos(4*x*w) + b4*sin(4*x*w) + a5*cos(5*x*w) + b5*sin(5*x*w) + a6*cos(6*x*w) + b6*sin(6*x*w) + a7*cos(7*x*w) + b7*sin(7*x*w) + a8*cos(8*x*w) + b8*sin(8*x*w)

[0067] where x is the position value; y, w, a0, a1, a2, a3, a4, a5, a6, a7, a8, b1, b2, b3, b4, b5, b6, b7, b8 are all coefficients calculated by fitting.

[0068] The technical effect achieved by this embodiment is as follows: A method for using a diaphragm buffer cam curve acquisition and fitting device provided by this application enables various-sized electrode sheets to automatically calculate the cam curve by collecting data to form a fitting curve, which can significantly improve the debugging and model change efficiency.

[0069] Embodiment 3

[0070] Based on the above embodiment, this embodiment studies a data comparison of a diaphragm buffer cam curve acquisition and fitting device and its using method. As Figure 1 shown, the stacking table 3 is fixed and used for stacking. The diaphragm transverse movement mechanism 201 moves left and right to control the diaphragm to wrap the positive and negative electrode sheets in a Z shape. During stacking, the diaphragm alternately covers the positive and negative electrode sheets by the left and right movement of the diaphragm transverse movement mechanism 201. When the diaphragm transverse movement mechanism 201 moves, the length of the diaphragm will change from winding to unwinding, and the telescopic amount of the diaphragm is absorbed by the diaphragm buffer mechanism 103. To ensure the stability of the diaphragm tension when the diaphragm length changes, the actions of the diaphragm transverse movement mechanism 201 and the diaphragm buffer mechanism 103 need to be synchronized, so as to ensure that the telescopic amount of the diaphragm caused by the movement of the diaphragm transverse movement mechanism 201 is completely absorbed by the diaphragm buffer mechanism 103. When the deformation amount absorbed by the diaphragm buffer mechanism 103 reaches a certain level, the diaphragm unwinding mechanism 101 needs to unwind the diaphragm to restore the telescopic amount of the diaphragm absorbed by the diaphragm buffer mechanism 103, so as to ensure that the telescopic amount can be absorbed again during the next diaphragm transverse movement.

[0071] When the same device stacks electrode sheets of different sizes, the amount of expansion and contraction caused by the movement of the diaphragm transverse movement mechanism 201 is different. In order to ensure the stability of the diaphragm tension when stacking electrode sheets of different sizes, it is necessary to obtain the positional relationship among the diaphragm transverse movement mechanism 201, the diaphragm buffer mechanism 103, and the diaphragm unwinding mechanism 101 to fit the cam curve of the diaphragm buffer.

[0072] By simulating the situation where the diaphragm tension mechanism 102 does not move during the lamination process, the real-time position value x of the diaphragm buffer mechanism 103 is actually measured. Then, the position equation of the diaphragm buffer mechanism 103 is calculated through the measured position value. Then, according to the actual required number of cam points, the cam curve of the diaphragm buffer mechanism 103 with any number of points is generated using this equation. All the numerical values in this method are obtained through actual measurement, so the position value of the diaphragm buffer can be truly reflected, and the diaphragm tension is well controlled after applying this method.

[0073] The position equation is fitted by using the Fourier series as the fitting control equation by observing the shape of the collected curve. The position equation is: y = a0 + a1*cos(x·w) + b1*sin(x*w) + a2*cos(2*x*w) + b2*sin(2*x*w) + a3*cos(3*x*w) + b3*sin(3*x*w) + a4*cos(4*x*w) + b4*sin(4*x*w) + a5*cos(5*x*w) + b5*sin(5*x*w) + a6*cos(6*x*w) + b6*sin(6*x*w) + a7*cos(7*x*w) + b7*sin(7*x*w) + a8*cos(8*x*w) + b8*sin(8*x*w)

[0074] Among them, x is the position value; y, w, a0, a1, a2, a3, a4, a5, a6, a7, a8, b1, b2, b3, b4, b5, b6, b7, b8 are all coefficients calculated by fitting.

[0075] The fitting result is as Figure 2 shown. By collecting x and y and using the approximation iteration algorithm for calculation, the parameter values such as a0, a1, b1, w, etc. in the formula are obtained.

[0076] The technical effect achieved in this embodiment is that the fitting curve obtained by the diaphragm buffer cam curve acquisition and fitting device provided in this application is highly overlapped with the curve of the original collected data, which can truly reflect the position value of the diaphragm buffer, and the diaphragm tension is well controlled after applying this method.

[0077] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. For those skilled in the art, various modifications and variations can be made to the present invention. Any changes, modifications, substitutions, integrations, and parameter changes made to these embodiments by means of conventional substitutions or capable of achieving the same functions without departing from the principle and spirit of the present invention fall within the protection scope of the present invention.

Claims

1. A diaphragm buffer cam curve acquisition and fitting device, characterized in that Including: Unwinding table (1), transverse moving table (2), and laminating table (3); the unwinding table (1), transverse moving table (2), and laminating table (3) are all independent platforms; the unwinding table (1), transverse moving table (2), and laminating table (3) are located in the same vertical plane; the transverse moving table (2) is below the unwinding table (1); the laminating table (3) is below the transverse moving table (2).

2. The diaphragm buffer cam curve acquisition and fitting device according to claim 1, wherein The unwinding table (1) includes a diaphragm unwinding mechanism (101), a diaphragm tension mechanism (102), a diaphragm buffer mechanism (103), and a diaphragm fixing pinch roll (104); The diaphragm unwinding mechanism (101), diaphragm tension mechanism (102), diaphragm buffer mechanism (103), and diaphragm fixing pinch roll (104) are on the same side of the unwinding table (1); The diaphragm unwinding mechanism (101) and diaphragm buffer mechanism (103) are below the diaphragm tension mechanism (102); the diaphragm unwinding mechanism (101) is on the left side of the diaphragm buffer mechanism (103); There are several guide rollers between the diaphragm unwinding mechanism (101) and the diaphragm tension mechanism (102); there are several guide rollers between the diaphragm tension mechanism (102) and the diaphragm buffer mechanism (103).

3. The diaphragm buffer cam curve acquisition and fitting device according to claim 2, characterized in that, The transverse moving table (2) includes a diaphragm transverse moving mechanism (201), a diaphragm transverse moving upper pinch roll (202), and a diaphragm transverse moving lower pinch roll (203); one side of the transverse moving table (2) is the diaphragm transverse moving mechanism (201), and the other side is the diaphragm transverse moving upper pinch roll (202) and diaphragm transverse moving lower pinch roll (203); the diaphragm transverse moving mechanism (201) is perpendicular to the transverse moving table (2); the diaphragm transverse moving upper pinch roll (202) is above the diaphragm transverse moving lower pinch roll (203); there are several guide rollers between the diaphragm transverse moving upper pinch roll (202) and diaphragm transverse moving lower pinch roll (203).

4. The diaphragm buffer cam curve acquisition and fitting device according to claim 3, characterized in that, The laminating table (3) includes a laminating table negative U clip (301) and a laminating table positive U clip (302); the laminating table negative U clip (301) and laminating table positive U clip (302) are in the same plane; the laminating table negative U clip (301) is on the side of the laminating table (3) close to the diaphragm transverse moving lower pinch roll (203), and the laminating table positive U clip (302) is on the other side of the laminating table (3).

5. A diaphragm buffer cam curve acquisition and fitting device according to claim 4, characterized in that, The laminating table negative U clip (301) is closely attached to the laminating table (3), and there is a gap between the laminating table positive U clip (302) and the laminating table (3).

6. A method for using a diaphragm buffer cam curve acquisition and fitting device according to any one of claims 1-5, characterized in that, Including the following steps: Step S1: The diaphragm unwinding mechanism (101) remains stationary; the diaphragm transverse moving mechanism (201) moves, and the diaphragm buffer mechanism (103) moves synchronously with the diaphragm transverse moving mechanism (201); Step S2: Record the motor position of the diaphragm buffer mechanism (103); Step S3: Use a fitting algorithm to fit the acquisition curve equation of the diaphragm buffer mechanism (103), generate a cam curve of the diaphragm buffer mechanism (103) with any number of points using this equation, and give this curve to the diaphragm buffer mechanism (103); Step S4: Record the position value x of the movement of the diaphragm buffer mechanism (103); Step S5: Fit the position equation y of the diaphragm buffer mechanism (103); Step S6: Generate a cam curve of the diaphragm buffer mechanism with any number of points.

7. The usage method of a diaphragm buffer cam curve acquisition and fitting device according to claim 6, characterized in that, In the step S1, when the diaphragm transverse movement mechanism (201) is at the positive electrode position, the positive U-shaped clamp (302) of the lamination table fixes the diaphragm; when the diaphragm transverse movement mechanism (201) is at the negative electrode position, the negative U-shaped clamp (301) of the lamination table fixes the diaphragm; the actions of the diaphragm transverse movement mechanism (201) and the diaphragm buffer mechanism (103) are synchronized, and the diaphragm expansion and contraction amount caused by the movement of the diaphragm transverse movement mechanism (201) is absorbed by the diaphragm buffer mechanism (103).

8. The usage method of a diaphragm buffer cam curve acquisition and fitting device according to claim 7, characterized in that, When the diaphragm expansion and contraction amount absorbed by the diaphragm buffer mechanism (103) reaches a certain level, the diaphragm unwinding mechanism (101) unwinds the diaphragm, and the diaphragm expansion and contraction amount absorbed by the diaphragm buffer mechanism (103) is restored to ensure that the diaphragm expansion and contraction amount can be absorbed again when the diaphragm transverse movement mechanism (201) moves next time.

9. The usage method of a diaphragm buffer cam curve acquisition and fitting device according to claim 6, characterized in that The movement in the step S1 includes two cases: moving from the positive electrode to the negative electrode and moving from the negative electrode to the positive electrode.

10. The usage method of a diaphragm buffer cam curve acquisition and fitting device according to claim 6, characterized in that, The position equation in the step S5 is as follows: y = a0 + a1*cos(x*w) + b1*sin(x*w) + a2*cos(2*x*w) + b2*sin(2*x*w) + a3*cos(3*x*w) + b3*sin(3*x*w) + a4*cos(4*x*w) + b4*sin(4*x*w) + a5*cos(5*x*w) + b5*sin(5*x*w) + a6*cos(6*x*w) + b6*sin(6*x*w) + a7*cos(7*x*w) + b7*sin(7*x*w) + a8*cos(8*x*w) + b8*sin(8*x*w) Where x is the position value; y, w, a0, a1, a2, a3, a4, a5, a6, a7, a8, b1, b2, b3, b4, b5, b6, b7, b8 are all coefficients calculated by fitting.

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