Lamination equipment diaphragm tension control method and laminated battery

Abstract

The invention discloses a lamination equipment diaphragm tension control method and a laminated battery, the lamination equipment comprises a diaphragm unwinding mechanism, a diaphragm tension mechanism, a diaphragm buffer mechanism, a fixed roller, a diaphragm roller mechanism and a lamination table, and a diaphragm sequentially passes through the diaphragm tension mechanism, the diaphragm buffer mechanism, the fixed roller, the diaphragm roller mechanism and the lamination table. The control method comprises the steps that the starting position, the first middle position and the final position of the diaphragm double-roller mechanism in the movement process are determined; the first middle position is located between the initial position and the final position, and when the diaphragm double-roller mechanism is located at the first middle position, the length of the diaphragm from the fixed roller to the initial position of the lamination table is the shortest length. And in the process that the diaphragm double-roller mechanism moves from the initial position to the first middle position, the maximum damping tension of the diaphragm tension mechanism is controlled to be first tension. And in the process that the diaphragm double-roller mechanism moves from the first middle position to the final position, the maximum damping tension of the diaphragm tension mechanism is controlled to be second tension, and the first tension is larger than the second tension.

Description

Technical Field

[0001] The present application relates to the technical field of lithium batteries, and in particular to a method for controlling the tension of a diaphragm of a lamination device and a lamination battery. Background Art

[0002] During the lamination process, the tension of the lamination equipment fluctuates greatly due to signal transmission, structural limitations, motion acceleration and deceleration, friction between the diaphragm and the roller, etc., and the diaphragm tension mechanism needs to swing in real time to ensure that the diaphragm approaches the tension setting value in real time. The existing diaphragm tension control technology for lamination equipment uses a mathematical model to calculate the change in the diaphragm length between the diaphragm buffer mechanism and the lamination table caused by the lateral movement of the roller mechanism during the lamination process, and transmits it to the diaphragm buffer mechanism in real time to ensure that the diaphragm buffer mechanism compensates for the change in diaphragm length in real time and ensures the diaphragm length to ensure the tension. In fact, due to the structural problems of the diaphragm buffer mechanism itself, the front and rear diaphragms at its position are pulled at the same time during the lateral movement. Although the diaphragm unwinding mechanism is stationary and pulls less diaphragm, it still causes the diaphragm buffer mechanism stroke to not match the actual diaphragm length, causing diaphragm tension fluctuations. Summary of the invention

[0003] The present application provides a method for controlling the diaphragm tension of a lamination device, which can enable the diaphragm length between the diaphragm buffer mechanism and the lamination platform to be accurately recovered and released in a timely manner by the diaphragm buffer mechanism.

[0004] In a first aspect, the present application provides a method for controlling the tension of a diaphragm of a laminating device, wherein the laminating device comprises a diaphragm unwinding mechanism, a diaphragm tension mechanism, a diaphragm buffer mechanism, a fixed roller, a diaphragm roller pair mechanism and a laminating table; the diaphragm unwinding mechanism is used to release the diaphragm, and the diaphragm passes through the diaphragm tension mechanism, the diaphragm buffer mechanism, the fixed roller, the diaphragm roller pair mechanism and the laminating table in sequence; the tension mechanism is used to set the damping tension to adjust the diaphragm tension; the diaphragm buffer mechanism is used to buffer the diaphragm released by the diaphragm unwinding mechanism; the diaphragm roller pair mechanism is used to drive the diaphragm in a linear reciprocating motion to achieve folding of the diaphragm;

[0005] The control method comprises:

[0006] Determine the starting position, the first intermediate position and the end position of the diaphragm roller mechanism in the movement process; the first intermediate position is between the starting position and the end position, and when the diaphragm roller mechanism is at the first intermediate position, the length of the diaphragm from the fixed roller to the starting position of the lamination table is the shortest length;

[0007] During the movement of the diaphragm roller mechanism from the starting position to the first intermediate position, controlling the maximum damping tension of the diaphragm tension mechanism to be the first tension;

[0008] During the movement of the diaphragm roller mechanism from the first intermediate position to the end position, the maximum damping tension of the diaphragm tension mechanism is controlled to be the second tension, and the first tension is greater than the second tension.

[0009] The present application realizes variable tension control of the diaphragm by setting the first tension and the second tension of the diaphragm tension mechanism. The first tension refers to the maximum damping tension of the diaphragm that can pull the diaphragm tension mechanism during the movement of the diaphragm roller mechanism from the starting position to the first intermediate position, and the second tension refers to the maximum damping tension that can pull the diaphragm tension mechanism during the movement of the diaphragm roller mechanism from the first intermediate position to the terminal position, and the first tension is greater than the second tension. When the diaphragm tension mechanism is set to the first tension, the diaphragm between the diaphragm tension mechanism and the stacking table is not easy to pull the diaphragm tension mechanism, and the length of the diaphragm between the diaphragm buffer mechanism and the stacking table can be accurately recovered and released by the diaphragm buffer mechanism in time, ensuring the consistency between the length of the diaphragm recovered by the diaphragm buffer mechanism and the actual length of the diaphragm reduced between the diaphragm buffer mechanism and the stacking table. At the same time, the diaphragm between the diaphragm unwinding mechanism and the diaphragm tension mechanism will not be pulled, thereby improving the accuracy of the diaphragm length released by the diaphragm unwinding mechanism. When the diaphragm tension mechanism is set to the second tension, the diaphragm can pull the diaphragm tension mechanism to move, making it difficult for the diaphragm tension to change greatly, reducing the tension fluctuation amplitude, maintaining the diaphragm tensioned state between the diaphragm buffer mechanism and the stacking table, and making it difficult for the diaphragm to wrinkle during the stacking process.

[0010] In a feasible implementation, during the movement of the diaphragm roller mechanism from the starting position to the first intermediate position, the first tension is greater than or equal to the diaphragm tension.

[0011] and / or

[0012] During the movement of the diaphragm roller mechanism from the first intermediate position to the end position, the second tension is less than or equal to the diaphragm tension.

[0013] When the first tension is greater than or equal to the diaphragm tension, the diaphragm between the diaphragm tension mechanism and the stacking platform is not easy to pull the diaphragm tension mechanism, and the length of the diaphragm between the diaphragm buffer mechanism and the stacking platform can be accurately recovered and released by the diaphragm buffer mechanism in a timely manner, maintaining the consistency between the diaphragm length recovered by the diaphragm buffer mechanism and the actual diaphragm reduction length between the diaphragm buffer mechanism and the stacking platform. At the same time, the diaphragm between the diaphragm unwinding mechanism and the diaphragm tension mechanism will not be pulled, thereby improving the accuracy of the diaphragm length released by the diaphragm unwinding mechanism. When the second tension is less than or equal to the diaphragm tension, the diaphragm can pull the diaphragm tension mechanism to move, reduce the tension fluctuation of the diaphragm during the stacking process, maintain the diaphragm tensioned state between the diaphragm buffer mechanism and the stacking platform, and make it more difficult for the diaphragm to wrinkle during the stacking process.

[0014] In a feasible implementation, the first tension is 1.5 to 2 times the second tension;

[0015] and / or

[0016] The time for the diaphragm roller mechanism to move from the starting position to the first intermediate position is less than or equal to 0.3 seconds.

[0017] In the lamination equipment, the elasticity of the diaphragm is a very important characteristic, which directly affects the performance and safety of the lithium battery. When the difference between the first tension and the second tension is too large, the elasticity of the diaphragm is easily invalidated. When the difference between the first tension and the second tension is too small, it is not enough to switch the diaphragm tension mechanism from the first tension to the second tension. When the first tension is 1.5 times to 2 times the second tension, the time for the diaphragm tension mechanism to switch from the first tension to the second tension is sufficient, which can also avoid the elasticity failure of the diaphragm, maintain the tension state of the diaphragm between the diaphragm buffer mechanism and the lamination table, make it difficult for the diaphragm to wrinkle during the lamination process, and improve the thickness uniformity of the diaphragm during the production process. In the actual lamination process, the change of the diaphragm tension is relatively lagging, and it takes a certain amount of time for the diaphragm tension to increase. The first tension is a fixed value. If the movement time of the diaphragm roller mechanism is too long, it may cause the diaphragm tension to reach the first tension, thereby pulling the diaphragm tension mechanism, causing the diaphragm to produce a large tension fluctuation, making it difficult for the diaphragm length between the diaphragm buffer mechanism and the lamination table to be accurately recovered and released by the diaphragm buffer mechanism in time. Furthermore, since the first tension is 1.5 to 2 times of the second tension, the movement time of 0.3 s is not enough for the diaphragm tension to reach the first tension, so that the diaphragm tension mechanism is not easily pulled.

[0018] In a feasible implementation, when the diaphragm roller mechanism moves from the starting position to the first intermediate position, the length of the diaphragm between the diaphragm buffer mechanism and the stacking table gradually decreases, and the diaphragm is synchronously recovered by the diaphragm buffer mechanism to tighten the diaphragm between the diaphragm buffer mechanism and the stacking table.

[0019] The length of the diaphragm between the diaphragm buffer mechanism and the stacking table is promptly and accurately recovered by the diaphragm buffer mechanism, ensuring the consistency between the diaphragm length recovered by the diaphragm buffer mechanism and the actual diaphragm reduced length between the diaphragm buffer mechanism and the stacking table, while ensuring the accuracy of the diaphragm unwinding mechanism.

[0020] In a feasible implementation, during the movement of the diaphragm roller mechanism from the first intermediate position to the end position, the length of the diaphragm between the diaphragm buffer mechanism and the stacking platform increases, and the diaphragm is released through the diaphragm buffer mechanism to compensate for the diaphragm length required for the increase in the diaphragm length between the diaphragm buffer mechanism and the stacking platform.

[0021] The length of the diaphragm between the diaphragm buffer mechanism and the stacking table is promptly and accurately released by the diaphragm buffer mechanism, ensuring the consistency between the diaphragm length released by the diaphragm buffer mechanism and the actual increased length of the diaphragm between the diaphragm buffer mechanism and the stacking table, while ensuring that the diaphragm on the stacking table is smooth and wrinkle-free.

[0022] In a feasible implementation, during the movement of the diaphragm roller mechanism from the first intermediate position to the end position, the rate of change of the diaphragm tension decreasing is greater than the rate of change of the diaphragm tension increasing during the movement of the diaphragm roller mechanism from the starting position to the first intermediate position.

[0023] During the movement of the diaphragm roller mechanism from the first intermediate position to the terminal position, the diaphragm tension decreases. In order to make it difficult for the diaphragm tension to change greatly, reduce the tension fluctuation amplitude, maintain the diaphragm tension state between the diaphragm buffer mechanism and the lamination table, and make it difficult for the diaphragm to wrinkle during the lamination process, the diaphragm tension mechanism sets a second tension. Since the second tension is less than or equal to the diaphragm tension, during the movement of the diaphragm roller mechanism from the first intermediate position to the terminal position, the rate of change of the diaphragm tension decreases is greater than the rate of change of the diaphragm tension increases during the movement of the diaphragm roller mechanism from the starting position to the first intermediate position, so as to avoid large tension fluctuations during diaphragm lamination.

[0024] In a feasible implementation, the diaphragm roller mechanism passes through a second intermediate position during the movement from the end position to the starting position; the second intermediate position is located between the starting position and the end position, and when the diaphragm roller mechanism is located at the second intermediate position, the length of the diaphragm from the fixed roller to the end position of the stacking table is the shortest length.

[0025] During the movement of the diaphragm roller mechanism from the end position to the second intermediate position, the maximum damping tension of the diaphragm tension mechanism is controlled to be the first tension;

[0026] During the process of the diaphragm roller mechanism moving from the second intermediate position to the starting position, the maximum damping tension of the diaphragm tension mechanism is controlled to be the second tension.

[0027] During the lamination process, the diaphragm roller mechanism reciprocates between the starting position and the end position to laminate the diaphragm. During the movement of the diaphragm roller mechanism from the end position to the starting position, the tension control of the diaphragm is also very important. The process also sets the first tension and the second tension. When the diaphragm tension mechanism is set to the first tension, the diaphragm between the diaphragm tension mechanism and the lamination platform is not easy to pull the diaphragm tension mechanism, and the length of the diaphragm between the diaphragm buffer mechanism and the lamination platform can be accurately recovered and released by the diaphragm buffer mechanism in time, ensuring the consistency between the length of the diaphragm recovered by the diaphragm buffer mechanism and the actual length of the diaphragm reduced between the diaphragm buffer mechanism and the lamination platform. At the same time, the diaphragm between the diaphragm unwinding mechanism and the diaphragm tension mechanism will not be pulled, which improves the accuracy of the diaphragm length released by the diaphragm unwinding mechanism. When the diaphragm tension mechanism is set to the second tension, the diaphragm can pull the diaphragm tension mechanism to move, making it difficult for the diaphragm tension to change greatly, reducing the tension fluctuation amplitude, and maintaining the tension state of the diaphragm between the diaphragm buffer mechanism and the lamination platform, so that it is difficult for the diaphragm to wrinkle during the lamination process.

[0028] In a feasible implementation, during the movement of the diaphragm roller mechanism from the end position to the second intermediate position, the first tension is greater than or equal to the diaphragm tension;

[0029] and / or

[0030] During the movement of the diaphragm roller mechanism from the second intermediate position to the starting position, the second tension is less than or equal to the diaphragm tension.

[0031] When the first tension is greater than or equal to the diaphragm tension, the diaphragm between the diaphragm tension mechanism and the stacking platform is not easy to pull the diaphragm tension mechanism, and the length of the diaphragm between the diaphragm buffer mechanism and the stacking platform can be accurately recovered and released by the diaphragm buffer mechanism in a timely manner, maintaining the consistency between the diaphragm length recovered by the diaphragm buffer mechanism and the actual diaphragm reduction length between the diaphragm buffer mechanism and the stacking platform. At the same time, the diaphragm between the diaphragm unwinding mechanism and the diaphragm tension mechanism will not be pulled, thereby improving the accuracy of the diaphragm length released by the diaphragm unwinding mechanism. When the second tension is less than or equal to the diaphragm tension, the diaphragm can pull the diaphragm tension mechanism to move, reduce the tension fluctuation of the diaphragm during the stacking process, maintain the diaphragm tensioned state between the diaphragm buffer mechanism and the stacking platform, and make it more difficult for the diaphragm to wrinkle during the stacking process.

[0032] In a feasible implementation, the time for the diaphragm roller mechanism to move from the end position to the second intermediate position is less than or equal to 0.3 seconds.

[0033] In the actual lamination process, the change of diaphragm tension is relatively lagging, and it takes a certain amount of time for the diaphragm tension to increase. The first tension is a fixed value. If the diaphragm roller mechanism moves for too long, the diaphragm tension may reach the first tension, thereby pulling the diaphragm tension mechanism, causing the diaphragm to produce a large tension fluctuation, making it difficult for the diaphragm length between the diaphragm buffer mechanism and the lamination table to be accurately recovered and released in time by the diaphragm buffer mechanism. And because the first tension is 1.5 to 2 times the second tension, the movement time of 0.3s is not enough for the diaphragm tension to reach the first tension, so that the diaphragm tension mechanism is not easily pulled.

[0034] In a feasible implementation, when the diaphragm roller mechanism moves from the end position to the second intermediate position, the length of the diaphragm between the diaphragm buffer mechanism and the stacking table gradually decreases, and the diaphragm is synchronously recovered by the diaphragm buffer mechanism to tighten the diaphragm between the diaphragm buffer mechanism and the stacking table.

[0035] The length of the diaphragm between the diaphragm buffer mechanism and the stacking table is promptly and accurately recovered by the diaphragm buffer mechanism, ensuring the consistency between the diaphragm length recovered by the diaphragm buffer mechanism and the actual diaphragm reduced length between the diaphragm buffer mechanism and the stacking table, while ensuring the accuracy of the diaphragm unwinding mechanism.

[0036] In a feasible implementation, during the movement of the diaphragm roller mechanism from the second intermediate position to the starting position, the length of the diaphragm between the diaphragm buffer mechanism and the stacking platform increases, and the diaphragm is released through the diaphragm buffer mechanism to compensate for the diaphragm length required for the increase in the diaphragm length between the diaphragm buffer mechanism and the stacking platform.

[0037] The length of the diaphragm between the diaphragm buffer mechanism and the stacking table is promptly and accurately released by the diaphragm buffer mechanism, ensuring the consistency between the diaphragm length released by the diaphragm buffer mechanism and the actual increased length of the diaphragm between the diaphragm buffer mechanism and the stacking table, while ensuring that the diaphragm on the stacking table is smooth and wrinkle-free.

[0038] In a feasible implementation, during the movement of the diaphragm roller mechanism from the second middle position to the starting position, the diaphragm tension gradually decreases, and the rate of change is greater than the rate of change of the diaphragm tension increasing during the movement of the diaphragm roller mechanism from the end position to the second middle position.

[0039] During the movement of the diaphragm roller mechanism from the second intermediate position to the starting position, the diaphragm tension decreases. In order to make it difficult for the diaphragm tension to change greatly, reduce the tension fluctuation amplitude, maintain the diaphragm tensioning state between the diaphragm buffer mechanism and the lamination table, and make it difficult for the diaphragm to wrinkle during the lamination process, the diaphragm tension mechanism sets the second tension. Since the second tension is less than or equal to the diaphragm tension, during the movement of the diaphragm roller mechanism from the second intermediate position to the starting position, the rate of change of the diaphragm tension decreases is greater than the rate of change of the diaphragm tension increases during the movement of the diaphragm roller mechanism from the terminal position to the second intermediate position, so as to avoid large tension fluctuations during diaphragm lamination.

[0040] In a second aspect, the present application further provides a laminated battery, which is laminated using the method described in the first aspect.

[0041] The diaphragm passes through the diaphragm unwinding mechanism, diaphragm tension mechanism, diaphragm buffer mechanism, fixed roller, diaphragm roller mechanism and lamination platform in sequence. First, the starting position, first intermediate position and terminal position of the diaphragm roller mechanism in the movement process are determined. When the diaphragm roller mechanism moves from the starting position to the first intermediate position, the maximum damping tension of the diaphragm tension mechanism is controlled to be the first tension. When the diaphragm roller mechanism moves from the first intermediate position to the terminal position, the maximum damping tension of the diaphragm tension mechanism is controlled to be the second tension, and the first tension is greater than the second tension. The length of the diaphragm between the diaphragm buffer mechanism and the lamination platform is accurately recovered or released by the diaphragm buffer mechanism in a timely manner, ensuring the consistency between the length of the diaphragm released by the diaphragm buffer mechanism and the actual length of the diaphragm reduced or increased between the diaphragm buffer mechanism and the lamination platform, ensuring that the diaphragm on the lamination platform is stable and wrinkle-free to form a laminated battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0043] Figure 1 It is a schematic diagram of the movement of the diaphragm roller mechanism driving the diaphragm from the starting position to the end position in the present invention;

[0044] Figure 2 is a flow chart of the control method in the present invention;

[0045] Figure 3 It is a schematic diagram of the movement of the diaphragm roller mechanism driving the diaphragm from the end position to the starting position in the present invention;

[0046] Figure 4 It is a detailed schematic diagram of the movement of the diaphragm roller mechanism driving the diaphragm from the starting position to the end position in the present invention;

[0047] Figure 5 It is a schematic diagram of the theoretical relationship between the diaphragm tension, the first tension and the second tension in the diaphragm tension control method of the lamination device of the present invention;

[0048] Figure 6 It is a schematic diagram of the actual relationship between the diaphragm tension, the first tension and the second tension under the diaphragm tension control method of the lamination equipment of the present invention.

[0049] Description of reference numerals:

[0050] 100-diaphragm unwinding mechanism, 101-diaphragm, 200-diaphragm tension mechanism, 300-diaphragm buffer mechanism, 400-fixed roller;

[0051] 500-diaphragm roller mechanism, 501-upper movable roller, 502-lower movable roller;

[0052] 700-Lamination table;

[0053] F1-first tension, F2-second tension. DETAILED DESCRIPTION

[0054] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0055] This application proposes a method for controlling the diaphragm tension of a lamination device, see Figure 1 The lamination equipment includes a diaphragm unwinding mechanism 100 , a diaphragm tension mechanism 200 , a diaphragm buffer mechanism 300 , a fixed roller 400 , a diaphragm roller pair mechanism 500 and a lamination platform 700 .

[0056] The membrane unwinding mechanism 100 releases the membrane 101 by rotating, and the membrane 101 passes through the membrane tension mechanism 200, the membrane buffer mechanism 300, the fixed roller 400, the membrane roller mechanism 500 and the laminating table 700 in sequence. The membrane tension mechanism 200 is located between the membrane unwinding mechanism 100 and the membrane buffer mechanism 300. After the membrane unwinding mechanism 100 releases the membrane 101 of the corresponding length, and the membrane buffer mechanism 300 buffers the membrane 101 of the corresponding length, the membrane roller mechanism 500 starts to laminate the membrane 101 through reciprocating linear motion.

[0057] The diaphragm tension mechanism 200 is used to set the damping tension to adjust the tension of the diaphragm 101, and achieves precise control of the tension of the diaphragm 101 through swinging;

[0058] The diaphragm buffer mechanism 300 is used to buffer the diaphragm 101 released by the diaphragm unwinding mechanism 100, and realizes accurate length recovery and release of the diaphragm 101 through lateral movement;

[0059] The fixed roller 400 and the laminating platform 700 are fixed, and the membrane roller mechanism 500 drives the membrane 101 through linear reciprocating motion between the fixed roller 400 and the laminating platform 700. Among them, the upper movable roller 501 of the membrane roller mechanism 500 is close to the fixed roller 400, used to collect the membrane 101, and the lower movable roller 502 of the membrane roller mechanism 500 is close to the fixed roller 400, used to release the membrane 101 for folding.

[0060] See also Figure 2 , control methods include:

[0061] S101, determine the starting position X1, the first intermediate position X2 and the end position X3 of the membrane roller mechanism 500 in the movement process, the first intermediate position X2 is located between the starting position X1 and the end position X3, when the membrane roller mechanism 500 is located at the first intermediate position X2, the length of the membrane 101 from the fixed roller 400 to the starting position of the stacking table 700 is the shortest length, at this time A+B+C1 is the minimum value. The process of the reciprocating linear motion of the membrane roller mechanism 500 is:

[0062] The diaphragm 101 drives the diaphragm roller mechanism 500 to move from the starting position X1 to the end position X3, passing through the first intermediate position X2. Figure 1 As shown, A is the length of the diaphragm from the fixed roller 400 to the upper movable roller 501 of the diaphragm roller mechanism 500, B is the length of the diaphragm inside the diaphragm roller mechanism 500, and C1 is the length of the diaphragm from the lower movable roller 502 of the diaphragm roller mechanism 500 to the starting position of the stacking table 700.

[0063] Table 1

[0064]

[0065] As shown in Table 1, the lamination equipment will have six special positions in the actual working process due to the influence of environmental factors and equipment parameters. Figure 4 When the diaphragm roller mechanism 500 is located at the starting position X1, A is the maximum value; when the diaphragm roller mechanism 500 is located at the X5 position, C1 is the minimum value; when the diaphragm roller mechanism 500 is located at the X6 position, A+B+C1 is equal to A+B+C1 at the X5 position; there is a position between the X5 position and the X6 position where A+B+C1 is the minimum value, namely, the first intermediate position X2; when the diaphragm roller mechanism 500 is located at the X7 position, A is the minimum value; when the diaphragm roller mechanism 500 is located at the end position X3, both C1 and A+B+C1 are maximum values.

[0066] Combination Figure 1 and Figure 4 As shown, Figure 1 The diaphragm tension state at the starting position X1 corresponds to Figure 5X1 in Figure 1 The diaphragm tension state at the end position X3 corresponds to Figure 5 X3 in Figure 1 The diaphragm tension state of the first intermediate position X2 corresponds to Figure 5 X2 in.

[0067] S102, during the movement of the diaphragm roller mechanism 500 from the starting position X1 to the first intermediate position X2, the maximum damping tension of the diaphragm tension mechanism 200 is controlled to be the first tension F1. When the diaphragm tension mechanism 200 is set to the first tension F1, the diaphragm between the diaphragm tension mechanism 200 and the stacking platform 700 is not easy to pull the diaphragm tension mechanism 200, and the length of the diaphragm between the diaphragm buffer mechanism 300 and the stacking platform 700 can be accurately recovered and released by the diaphragm buffer mechanism 300 in time, ensuring the consistency between the length of the diaphragm recovered by the diaphragm buffer mechanism 300 and the actual length of the diaphragm reduced between the diaphragm buffer mechanism 300 and the stacking platform 700. At the same time, the diaphragm between the diaphragm unwinding mechanism 100 and the diaphragm tension mechanism 200 will not be pulled, thereby improving the accuracy of the diaphragm length released by the diaphragm unwinding mechanism 100.

[0068] S103, during the movement of the diaphragm roller mechanism 500 from the first intermediate position X2 to the terminal position X3, the maximum damping tension of the diaphragm tension mechanism 200 is controlled to be the second tension F2, and the first tension F1 is greater than the second tension F2. When the diaphragm tension mechanism 200 is set to the second tension F2, the diaphragm 101 can pull the diaphragm tension mechanism 200 to move, making it difficult for the diaphragm tension to change greatly, reducing the tension fluctuation amplitude, maintaining the diaphragm tension state between the diaphragm buffer mechanism 300 and the lamination table 700, and making it difficult for the diaphragm to wrinkle during the lamination process.

[0069] During the movement of the diaphragm roller mechanism 500 from the starting position X1 to the first intermediate position X2, the first tension F1 is greater than or equal to the diaphragm tension. When the first tension F1 is greater than or equal to the diaphragm tension, the diaphragm 101 between the diaphragm tension mechanism 200 and the stacking platform 700 is not easy to pull the diaphragm tension mechanism 200, and the length of the diaphragm between the diaphragm buffer mechanism 300 and the stacking platform 700 can be accurately recovered and released by the diaphragm buffer mechanism 300 in time, maintaining the consistency between the length of the diaphragm recovered by the diaphragm buffer mechanism 300 and the actual length of the diaphragm reduced between the diaphragm buffer mechanism 300 and the stacking platform 700. At the same time, the diaphragm between the diaphragm unwinding mechanism 100 and the diaphragm tension mechanism 200 will not be pulled, thereby improving the accuracy of the diaphragm length released by the diaphragm unwinding mechanism 100.

[0070] During the movement of the diaphragm roller mechanism 500 from the first intermediate position X2 to the terminal position X3, the second tension F2 is less than or equal to the diaphragm tension. When the second tension F2 is less than or equal to the diaphragm tension, the diaphragm 101 can pull the diaphragm tension mechanism 200 to move, thereby reducing the tension fluctuation of the diaphragm 101 during the lamination process, maintaining the diaphragm tension state between the diaphragm buffer mechanism 300 and the lamination platform 700, and making it difficult for the diaphragm to wrinkle during the lamination process.

[0071] The first tension F1 is 1.5 to 2 times the second tension F2. In the lamination equipment, the elasticity of the diaphragm is a very important characteristic, which directly affects the performance and safety of the lithium battery. When the difference between the first tension F1 and the second tension F2 is too large, the elasticity of the diaphragm is easily invalidated. When the difference between the first tension F1 and the second tension F2 is too small, it is not enough to switch the diaphragm tension mechanism 200 from the first tension F1 to the second tension F2. When the first tension F1 is 1.5 to 2 times the second tension F2, the time for the diaphragm tension mechanism 200 to switch from the first tension F1 to the second tension F2 is sufficient, and the elasticity of the diaphragm can be avoided. The diaphragm tensioning state between the diaphragm buffer mechanism 300 and the lamination table 700 is maintained, so that the diaphragm is less likely to wrinkle during the lamination process, and the thickness uniformity of the diaphragm during the production process can also be improved.

[0072] It can be understood that diaphragm elasticity refers to the ability of the diaphragm to deform under external force under a certain working pressure and to return to its original shape and size after the external force is removed.

[0073] The time for the diaphragm roller mechanism 500 to move from the starting position X1 to the first intermediate position X2 is less than or equal to 0.3 seconds. In the actual lamination process, the change of the diaphragm tension is relatively lagging, and it takes a certain amount of time for the diaphragm tension to increase. The first tension F1 is a fixed value. If the diaphragm roller mechanism 500 moves for too long, it may cause the diaphragm tension to reach the first tension F1, thereby pulling the diaphragm tension mechanism 200, causing the diaphragm to produce a large tension fluctuation, making it difficult for the diaphragm length between the diaphragm buffer mechanism 300 and the lamination platform 700 to be accurately recovered and released in time by the diaphragm buffer mechanism 300. And because the first tension F1 is 1.5 to 2 times the second tension F2, the movement time of 0.3 seconds is not enough for the diaphragm tension to reach the first tension F1, so that the diaphragm tension mechanism 200 is not easily pulled.

[0074] During the movement of the diaphragm roller mechanism 500 from the starting position to the first intermediate position X2, the length of the diaphragm 101 between the diaphragm buffer mechanism 300 and the stacking platform 700 gradually decreases, and at this time, the value of A+B+C1 gradually decreases. The diaphragm buffer mechanism 300 synchronously retracts the diaphragm of the corresponding length to tighten the diaphragm between the diaphragm buffer mechanism 300 and the stacking platform 700. In this process, when the diaphragm buffer mechanism 300 synchronously retracts the diaphragm of the corresponding length, it will not pull the diaphragm in front of its position, that is, the diaphragm between the diaphragm tension mechanism 200 and the diaphragm unwinding mechanism 100, so as to ensure the consistency between the length of the diaphragm recovered by the diaphragm buffer mechanism 300 and the actual length of the diaphragm reduced between the diaphragm buffer mechanism 300 and the stacking platform 700.

[0075] During the movement of the membrane roller mechanism 500 from the first intermediate position X2 to the terminal position X3, the membrane length between the membrane buffer mechanism 300 and the stacking platform 700 gradually increases, and the membrane buffer mechanism 300 synchronously releases the membrane 101 to compensate for the membrane length required for the increase in the membrane length between the membrane buffer mechanism 300 and the stacking platform 700. In this process, the membrane length between the membrane buffer mechanism 300 and the stacking platform 700 is accurately released by the membrane buffer mechanism 300 in a timely manner, ensuring the consistency between the membrane length released by the membrane buffer mechanism 300 and the actual membrane increase length between the membrane buffer mechanism 300 and the stacking platform 700, and ensuring that the membrane on the stacking platform is stable and wrinkle-free.

[0076] Depend on Figure 5 It can be seen that during the movement of the diaphragm roller mechanism 500 from the first intermediate position to the terminal position, the rate of change of the diaphragm tension decreasing is greater than the rate of change of the diaphragm tension increasing during the movement of the diaphragm roller mechanism 500 from the starting position to the first intermediate position. During the movement of the diaphragm roller mechanism 500 from the first intermediate position X2 to the terminal position X3, the diaphragm tension decreases. In order to make it difficult for the diaphragm tension to change greatly, reduce the tension fluctuation amplitude, maintain the diaphragm tensioning state between the diaphragm buffer mechanism 300 and the lamination table 700, and make it difficult for the diaphragm to wrinkle during the lamination process, the diaphragm tension mechanism 200 sets the second tension F2. Since the second tension F2 is less than or equal to the diaphragm tension, during the movement of the diaphragm roller mechanism 500 from the first intermediate position X2 to the terminal position X3, the rate of change of the diaphragm tension decreasing is greater than the rate of change of the diaphragm increasing during the movement of the diaphragm roller mechanism 500 from the starting position X1 to the first intermediate position X2, which can avoid large tension fluctuations during diaphragm lamination.

[0077] It is worth noting that Figure 6As shown, in the actual lamination process, affected by the production equipment, the two processes of setting the diaphragm tension mechanism 200 to the first tension F1 and switching from the first tension F1 to the second tension F2 require a certain displacement for buffering, and the change rate of the damping tension of the diaphragm tension mechanism 200 in these two processes is greater than the change rate of the diaphragm tension. At the same time, in the process of the diaphragm roller mechanism 500 moving from the first intermediate position X2 to the terminal position X3, there may be an X0 position, which makes the diaphragm tension equal to the second tension F2, so that the diaphragm 101 can pull the diaphragm tension mechanism 200, reducing the fluctuation amplitude of the diaphragm tension.

[0078] In another embodiment, Figure 3 As shown, the diaphragm 101 drives the diaphragm roller mechanism 500 to move from the end position X3 to the starting position X1, passing through the second intermediate position X4, and C2 is the diaphragm length from the lower movable roller 502 of the diaphragm roller mechanism 500 to the end position of the stacking table 700.

[0079] The diaphragm tension mechanism 200 is used to set the damping tension to adjust the tension of the diaphragm 101, and achieves precise control of the tension of the diaphragm 101 through swinging;

[0080] The diaphragm buffer mechanism 300 is used to buffer the diaphragm 101 released by the diaphragm unwinding mechanism 100, and realizes accurate length recovery and release of the diaphragm 101 through lateral movement;

[0081] The fixed roller 400 and the laminating platform 700 are fixed, and the membrane roller mechanism 500 drives the membrane 101 through linear reciprocating motion between the fixed roller 400 and the laminating platform 700. Among them, the upper movable roller 501 of the membrane roller mechanism 500 is close to the fixed roller 400, used to collect the membrane 101, and the lower movable roller 502 of the membrane roller mechanism 500 is close to the fixed roller 400, used to release the membrane 101 for folding.

[0082] Control methods include:

[0083] Determine the starting position X1, the second middle position X4 and the end position X3 of the diaphragm roller mechanism 500 in the movement process. The second middle position X4 is located between the starting position X1 and the end position X3. When the diaphragm roller mechanism 500 is located at the second middle position X4, the length of the diaphragm 101 from the fixed roller 400 to the end position of the stacking table 700 is the shortest length. At this time, A+B+C2 is the minimum value.

[0084] During the movement of the diaphragm roller mechanism 500 from the terminal position X3 to the second intermediate position X4, the maximum damping tension of the diaphragm tension mechanism 200 is controlled to be the first tension F1. When the diaphragm tension mechanism 200 is set to the first tension F1, the diaphragm between the diaphragm tension mechanism 200 and the stacking platform 700 is not easy to pull the diaphragm tension mechanism 200, and the length of the diaphragm between the diaphragm buffer mechanism 300 and the stacking platform 700 can be accurately recovered and released by the diaphragm buffer mechanism 300 in time, ensuring the consistency between the length of the diaphragm recovered by the diaphragm buffer mechanism 300 and the actual length of the diaphragm reduced between the diaphragm buffer mechanism 300 and the stacking platform 700. At the same time, the diaphragm between the diaphragm unwinding mechanism 100 and the diaphragm tension mechanism 200 will not be pulled, thereby improving the accuracy of the diaphragm length released by the diaphragm unwinding mechanism 100.

[0085] During the movement of the diaphragm roller mechanism 500 from the second intermediate position X4 to the starting position X1, the maximum damping tension of the diaphragm tension mechanism 200 is controlled to be the second tension F2, and the first tension F1 is greater than the second tension F2. When the diaphragm tension mechanism 200 is set to the second tension F2, the diaphragm 101 can pull the diaphragm tension mechanism 200 to move, reduce the tension fluctuation of the diaphragm during the lamination process, and maintain the tension state of the diaphragm between the diaphragm buffer mechanism 300 and the lamination platform 700.

[0086] During the movement of the diaphragm roller mechanism 500 from the terminal position X3 to the second intermediate position X4, the first tension F1 is greater than or equal to the diaphragm tension. When the first tension F1 is greater than or equal to the diaphragm tension, the diaphragm 101 between the diaphragm tension mechanism 200 and the stacking platform 700 is not easy to pull the diaphragm tension mechanism 200, and the length of the diaphragm between the diaphragm buffer mechanism 300 and the stacking platform 700 can be accurately recovered and released by the diaphragm buffer mechanism 300 in time, maintaining the consistency between the length of the diaphragm recovered by the diaphragm buffer mechanism 300 and the actual length of the diaphragm reduced between the diaphragm buffer mechanism 300 and the stacking platform 700. At the same time, the diaphragm between the diaphragm unwinding mechanism 100 and the diaphragm tension mechanism 200 will not be pulled, thereby improving the accuracy of the diaphragm length released by the diaphragm unwinding mechanism 100.

[0087] During the movement of the diaphragm roller mechanism 500 from the second intermediate position X4 to the starting position X1, the second tension F2 is less than or equal to the diaphragm tension. When the second tension F2 is less than or equal to the diaphragm tension, the diaphragm 101 can pull the diaphragm tension mechanism 200 to move, thereby reducing the tension fluctuation of the diaphragm 101 during the lamination process, maintaining the diaphragm tension state between the diaphragm buffer mechanism 300 and the lamination platform 700, and making it difficult for the diaphragm to wrinkle during the lamination process.

[0088] The first tension F1 is 1.5 to 2 times the second tension F2. In the lamination equipment, the elasticity of the diaphragm is a very important characteristic, which directly affects the performance and safety of the lithium battery. When the difference between the first tension F1 and the second tension F2 is too large, the elasticity of the diaphragm is easily invalidated. When the difference between the first tension F1 and the second tension F2 is too small, it is not enough to switch the diaphragm tension mechanism 200 from the first tension F1 to the second tension F2. When the first tension F1 is 1.5 to 2 times the second tension F2, the time for the diaphragm tension mechanism 200 to switch from the first tension F1 to the second tension F2 is sufficient, and the elasticity of the diaphragm can be avoided. The diaphragm tensioning state between the diaphragm buffer mechanism 300 and the lamination table 700 is maintained, so that the diaphragm is less likely to wrinkle during the lamination process, and the thickness uniformity of the diaphragm during the production process can also be improved.

[0089] The time for the diaphragm roller mechanism 500 to move from the terminal position X3 to the second intermediate position X4 is less than or equal to 0.3 seconds. In the actual lamination process, the change of the diaphragm tension is relatively lagging, and it takes a certain amount of time for the diaphragm tension to increase. The first tension F1 is a fixed value. If the diaphragm roller mechanism 500 moves for too long, it may cause the diaphragm tension to reach the first tension F1, thereby pulling the diaphragm tension mechanism 200, causing the diaphragm to produce a large tension fluctuation, making it difficult for the diaphragm length between the diaphragm buffer mechanism 300 and the lamination platform 700 to be accurately recovered and released in time by the diaphragm buffer mechanism 300. And because the first tension F1 is 1.5 to 2 times the second tension F2, the movement time of 0.3 seconds is not enough for the diaphragm tension to reach the first tension F1, so that the diaphragm tension mechanism 200 is not easily pulled.

[0090] During the movement of the diaphragm roller mechanism 500 from the terminal position X3 to the second intermediate position X4, the length of the diaphragm 101 between the diaphragm buffer mechanism 300 and the stacking platform 700 gradually decreases, and at this time, the value of A+B+C2 gradually decreases. The diaphragm buffer mechanism 300 synchronously recycles the diaphragm of the corresponding length to tighten the diaphragm between the diaphragm buffer mechanism 300 and the stacking platform 700. In this process, when the diaphragm buffer mechanism 300 synchronously retracts the diaphragm of the corresponding length, it will not pull the diaphragm in front of its position, that is, the diaphragm between the diaphragm tension mechanism 200 and the diaphragm unwinding mechanism 100, so as to ensure the consistency between the length of the diaphragm recovered by the diaphragm buffer mechanism 300 and the actual length of the diaphragm reduced between the diaphragm buffer mechanism 300 and the stacking platform 700.

[0091] When the membrane roller mechanism 500 moves from the second intermediate position X4 to the starting position X1, the membrane length between the membrane buffer mechanism 300 and the lamination table 700 gradually increases. At this time, the value of A+B+C2 gradually increases.

[0092] The diaphragm buffer mechanism 300 synchronously releases the diaphragm 101 to compensate for the diaphragm length required for the increase in the diaphragm length between the diaphragm buffer mechanism 300 and the stacking platform 700. In this process, the diaphragm length between the diaphragm buffer mechanism 300 and the stacking platform 700 is accurately released by the diaphragm buffer mechanism 300 in a timely manner, ensuring the consistency between the diaphragm length released by the diaphragm buffer mechanism 300 and the actual diaphragm increase length between the diaphragm buffer mechanism 300 and the stacking platform 700, while ensuring that the diaphragm on the stacking platform is stable and wrinkle-free.

[0093] During the movement of the diaphragm roller mechanism 500 from the second intermediate position X4 to the starting position X1, the rate of change of the diaphragm tension decreases is greater than the rate of change of the diaphragm tension increases during the movement of the diaphragm roller mechanism 500 from the terminal position X3 to the second intermediate position X4. During the movement of the diaphragm roller mechanism 500 from the second intermediate position X4 to the starting position X1, the diaphragm tension decreases. In order to control the fluctuation of the diaphragm tension and ensure that the diaphragm on the lamination table 700 is stable and wrinkle-free, the diaphragm tension mechanism 200 sets the second tension F2. Since the second tension F2 is less than or equal to the diaphragm tension, during the movement of the diaphragm roller mechanism 500 from the second intermediate position X4 to the starting position X1, the rate of change of the diaphragm tension decreases is greater than the rate of change of the diaphragm tension increases during the movement of the diaphragm roller mechanism 500 from the terminal position X3 to the second intermediate position X4, so as to avoid large tension fluctuations when the diaphragm 101 is laminated.

[0094] On the other hand, the present application also provides a laminated battery, which is laminated using the above implementation steps. The diaphragm passes through the diaphragm unwinding mechanism 100, the diaphragm tension mechanism 200, the diaphragm buffer mechanism 300, the fixed roller 400, the diaphragm roller mechanism 500 and the lamination table in sequence, and firstly determines the starting position, the first intermediate position and the end position of the diaphragm roller mechanism 500 in the movement process. When the diaphragm roller mechanism 500 moves from the starting position to the first intermediate position, the maximum damping tension of the diaphragm tension mechanism 200 is controlled to be the first tension. When the diaphragm roller mechanism 500 moves from the first intermediate position to the end position, the maximum damping tension of the diaphragm tension mechanism 200 is controlled to be the second tension, and the first tension is greater than the second tension. The length of the diaphragm between the diaphragm buffer mechanism 300 and the stacking platform 700 is accurately recovered or released by the diaphragm buffer mechanism 300 in a timely manner, ensuring the consistency between the length of the diaphragm released by the diaphragm buffer mechanism 300 and the actual length of the diaphragm reduced or increased between the diaphragm buffer mechanism 300 and the stacking platform 700, ensuring that the diaphragm on the stacking platform is smooth and wrinkle-free to form a stacked battery.

[0095] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0096] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0097] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0098] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0099] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for controlling the diaphragm tension of a lamination device, characterized in that: The lamination device comprises a diaphragm unwinding mechanism, a diaphragm tension mechanism, a diaphragm buffer mechanism, a fixed roller, a diaphragm roller pair mechanism and a lamination platform; the diaphragm unwinding mechanism is used to release the diaphragm, and the diaphragm passes through the diaphragm tension mechanism, the diaphragm buffer mechanism, the fixed roller, the diaphragm roller pair mechanism and the lamination platform in sequence; the tension mechanism is used to set the damping tension to adjust the diaphragm tension; the diaphragm buffer mechanism is used to buffer the diaphragm released by the diaphragm unwinding mechanism; The diaphragm roller mechanism is used to drive the diaphragm in linear reciprocating motion to achieve folding of the diaphragm; The control method comprises: Determine the starting position, the first intermediate position and the end position of the diaphragm roller mechanism in the movement process; the first intermediate position is located between the starting position and the end position, and when the diaphragm roller mechanism is located at the first intermediate position, the length of the diaphragm from the fixed roller to the starting position of the lamination table is the shortest length; During the movement of the diaphragm roller mechanism from the starting position to the first intermediate position, controlling the maximum damping tension of the diaphragm tension mechanism to be the first tension; During the movement of the diaphragm roller mechanism from the first intermediate position to the end position, the maximum damping tension of the diaphragm tension mechanism is controlled to be the second tension, and the first tension is greater than the second tension.

2. The method according to claim 1, characterized in that: During the movement of the diaphragm roller mechanism from the starting position to the first intermediate position, the first tension is greater than the diaphragm tension; and / or During the movement of the diaphragm roller mechanism from the first intermediate position to the end position, the second tension is less than or equal to the diaphragm tension.

3. The method according to claim 1 or 2, characterized in that: The first tension is 1.5 to 2 times the second tension; and / or The time for the diaphragm roller mechanism to move from the starting position to the first intermediate position is less than or equal to 0.3 seconds.

4. The method according to claim 1, characterized in that: When the diaphragm roller mechanism moves from the starting position to the first intermediate position, the length of the diaphragm between the diaphragm buffer mechanism and the stacking table gradually decreases, and the diaphragm is synchronously recovered by the diaphragm buffer mechanism to tighten the diaphragm between the diaphragm buffer mechanism and the stacking table.

5. The method according to claim 1 or 4, characterized in that: During the movement of the diaphragm roller mechanism from the first intermediate position to the end position, the diaphragm length between the diaphragm buffer mechanism and the stacking platform increases, and the diaphragm is released through the diaphragm buffer mechanism to compensate for the diaphragm length required for the increase in the diaphragm length between the diaphragm buffer mechanism and the stacking platform.

6. The method according to claim 1, characterized in that During the movement of the diaphragm roller mechanism from the first intermediate position to the terminal position, the rate of change of the diaphragm tension decreasing is greater than the rate of change of the diaphragm tension increasing during the movement of the diaphragm roller mechanism from the starting position to the first intermediate position.

7. The method according to claim 1, characterized in that The diaphragm roller mechanism will pass through a second intermediate position during the movement from the end position to the starting position; the second intermediate position is located between the starting position and the end position, and when the diaphragm roller mechanism is located at the second intermediate position, the length of the diaphragm from the fixed roller to the end position of the stacking table is the shortest length; During the movement of the diaphragm roller mechanism from the end position to the second intermediate position, the maximum damping tension of the diaphragm tension mechanism is controlled to be the first tension; During the process of the diaphragm roller mechanism moving from the second intermediate position to the starting position, the maximum damping tension of the diaphragm tension mechanism is controlled to be the second tension.

8. The method according to claim 7, characterized in that During the movement of the diaphragm roller mechanism from the end position to the second intermediate position, the first tension is greater than or equal to the diaphragm tension; and / or During the movement of the diaphragm roller mechanism from the second intermediate position to the starting position, the second tension is less than or equal to the diaphragm tension.

9. The method according to claim 7, characterized in that: The time for the diaphragm roller mechanism to move from the end position to the second intermediate position is less than or equal to 0.3 seconds.

10. The method according to claim 7, characterized in that When the diaphragm roller mechanism moves from the end position to the second intermediate position, the length of the diaphragm between the diaphragm buffer mechanism and the stacking table gradually decreases, and the diaphragm is synchronously recovered by the diaphragm buffer mechanism to tighten the diaphragm between the diaphragm buffer mechanism and the stacking table.

11. The method according to claim 7 or 10, characterized in that: During the movement of the diaphragm roller mechanism from the second intermediate position to the starting position, the diaphragm length between the diaphragm buffer mechanism and the stacking platform increases, and the diaphragm is released through the diaphragm buffer mechanism to compensate for the diaphragm length required for the increase in the diaphragm length between the diaphragm buffer mechanism and the stacking platform.

12. The method according to claim 7, characterized in that During the movement of the diaphragm roller mechanism from the second intermediate position to the starting position, the diaphragm tension gradually decreases, and the rate of change is greater than the rate of change of the diaphragm enlargement during the movement of the diaphragm roller mechanism from the end position to the second intermediate position.

13. A laminated battery, characterized in that: The laminated battery is laminated using the method described in any one of claims 1-12.

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