Diaphragm unwinding device
By designing the buffer mechanism and material take-up and unwinding assembly of the diaphragm unwinding device, the problem of diaphragm wrinkles in high-speed lamination was solved, achieving a stable supply of diaphragms and efficient production of battery cells.
Patent Information
- Application Number
- CN202520526830.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-25
AI Technical Summary
Existing traditional diaphragm buffer mechanisms cannot maintain the diaphragm in optimal condition in high-speed lamination equipment, leading to problems such as diaphragm wrinkling, and thus failing to meet the requirements of high-speed lamination.
A diaphragm unwinding device was designed, including an unwinding mechanism, a tension adjustment mechanism, a buffer mechanism, a film pulling mechanism, and a stacking mechanism. By setting up the buffer mechanism and the take-up and unwinding components, a certain length of diaphragm can be stored to ensure that the required length of diaphragm is accurately provided during high-speed stacking and to avoid the generation of wrinkles.
It achieves continuity and stability in the high-speed lamination process, improves the quality of the separator and the production efficiency of the battery cell, ensures that the separator does not loosen or overstretch during the lamination process, adapts to separators of different thicknesses and materials, reduces changeover time, and improves production efficiency.
Smart Images
Figure CN223892114U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stacking equipment technology, specifically to a diaphragm unwinding device. Background Technology
[0002] In the battery cell manufacturing process, the separator required is generally supplied in a strip structure. During cell stacking, the strip separator released from the unwinding mechanism undergoes correction, tension adjustment, buffering, and film stretching to cooperate with cell stacking. However, because the unwinding speed and film stretching speed cannot be kept consistent, coupled with the frequent correction and tension adjustment of the separator, the separator is prone to wrinkles. Therefore, the buffering mechanism plays a crucial role, adapting not only to the unwinding speed but also to the cell stacking speed, while maintaining the position and orientation of the corrected strip and the tension of the adjusted material, ensuring the separator remains in optimal condition at all times.
[0003] However, the existing traditional diaphragm buffer mechanism has a simple structure, and with the increase in stacking speed, it can no longer meet the needs of high-speed stacking equipment. Utility Model Content
[0004] To overcome the shortcomings of the prior art, this utility model provides a diaphragm unwinding device. By setting a buffer mechanism, it can store a certain length of diaphragm, and can quickly and accurately provide the required length of diaphragm during high-speed lamination, thereby ensuring the continuity and stability of the high-speed lamination process.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] A separator unwinding device includes an unwinding mechanism, a tension adjusting mechanism, a buffer mechanism, a film pulling mechanism, and a stacking mechanism. The unwinding mechanism is used to release the separator from the roll. The tension adjusting mechanism is used to adjust the tension of the separator. The buffer mechanism is used to buffer the separator. The film pulling mechanism is used to pull the separator. The stacking mechanism is used to move the separator back and forth to form a Z-shaped separator and to alternately stack positive and negative electrode sheets between the Z-shaped separator to form a battery cell. The buffer mechanism includes a feed roller, a take-up and unload assembly, and several transition rollers. The take-up and unload assembly is used to buffer the feed, stack the sheet, unload, and take up the sheet. The transition rollers are used to support and guide the separator.
[0007] As a further improvement to the above technical solution, the feeding and receiving assembly includes a feeding roller, a receiving roller, a first driving member for driving the feeding roller to move left and right, and a second driving member for driving the receiving roller to move left and right. The diaphragm is sequentially wound around the feeding roller, the feeding roller, the receiving roller, and the transition roller.
[0008] As a further improvement to the above technical solution, the feeding roller and the receiving roller are located on the left and right sides of the feeding roller, respectively.
[0009] As a further improvement to the above technical solution, the feeding roller and the receiving roller are both located on the same side of the feed roller.
[0010] As a further improvement to the above technical solution, the first driving component and the second driving component have the same structure. The first driving component includes a servo motor and a lead screw transmission module, and the feeding roller is connected to the lead screw transmission module.
[0011] As a further improvement to the above technical solution, the take-up and feed assembly includes a take-up and feed roller and a third driving member for driving the take-up and feed roller to move left and right, wherein the take-up and feed roller is located on one side of the feed roller.
[0012] As a further improvement to the above technical solution, a film pressing mechanism is also included. The film pressing mechanism is located between the buffer mechanism and the film pulling mechanism. The film pressing mechanism includes a film pressing assembly and a fourth driving member for driving the film pressing assembly to move up and down. The film pressing assembly includes two pressure rollers, and a diaphragm is inserted between the two pressure rollers.
[0013] As a further improvement to the above technical solution, the unwinding mechanism includes a first unwinding assembly, a second unwinding assembly, and a tape-connecting assembly. The tape-connecting assembly is located between the first unwinding assembly and the second unwinding assembly. The first unwinding assembly is used to release the first diaphragm, the second unwinding assembly is used to release the second diaphragm, and the tape-connecting assembly is used to combine the first diaphragm and the second diaphragm to form a working diaphragm.
[0014] As a further improvement to the above technical solution, a roll diameter detection module is provided on one side of both the first unwinding assembly and the second unwinding assembly. The roll diameter detection module is used to detect the outer diameter of the diaphragm roll.
[0015] As a further improvement to the above technical solution, a tension detection module is provided between the unwinding mechanism and the tension adjustment mechanism. The tension detection module is used to detect the tension of the diaphragm belt after unwinding.
[0016] The beneficial effects of this utility model are: This utility model provides a diaphragm unwinding device, which can store a certain length of diaphragm by setting up take-up and unwinding components with different structures, and can quickly and accurately provide the required length of diaphragm during high-speed lamination process, thereby ensuring the continuity and stability of the high-speed lamination process. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1 This is a structural schematic diagram provided in Embodiment 1 of this utility model;
[0019] Figure 2 This is a structural schematic diagram provided in Embodiment 2 of this utility model;
[0020] Figure 3 This is a structural schematic diagram provided in Embodiment 3 of this utility model.
[0021] Reference numerals: 100-unwinding mechanism, 110-first unwinding assembly, 120-second unwinding assembly, 130-tape splicing assembly, 140-roll diameter detection module, 200-tension adjustment mechanism, 210-tension detection module, 300-buffering mechanism, 310-feed roller, 320-take-up / unwinding assembly, 321a-unwinding roller, 322a-take-up roller, 323a-first drive component, 324a-second drive component, 321b-take-up / unwinding roller, 322b-third drive component, 330-transition roller, 400-film stretching mechanism, 500-stacked sheet mechanism, 600-film pressing mechanism, 610-film pressing assembly, 620-fourth drive component, 611-pressure roller. Detailed Implementation
[0022] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.
[0023] Example 1
[0024] Reference Figure 1 The present invention provides a diaphragm unwinding device, comprising an unwinding mechanism 100, a tension adjusting mechanism 200, a buffer mechanism 300, a film pulling mechanism 400, and a stacking mechanism 500.
[0025] Functionally, the unwinding mechanism 100 is used to release the separator in the roll, the tension adjusting mechanism 200 is used to adjust the tension of the separator, the buffer mechanism 300 is used to buffer the separator, the film pulling mechanism 400 is used to pull the separator, and the stacking structure is used to move the separator back and forth to form a Z-shaped separator, and to alternately stack the positive and negative electrode sheets between the Z-shaped separator to form a battery cell. The buffer mechanism 300 includes a feed roller 310, a take-up and unload assembly 320 and several transition rollers 330. The take-up and unload assembly 320 is used to buffer the feed, stacking unload and take-up, and the transition rollers 330 are used to support and guide the separator. Thus, it can store a certain length of separator, and can quickly and accurately provide the required length of separator during high-speed stacking, thereby ensuring the continuity and stability of the high-speed stacking process.
[0026] Preferably, the feeding and receiving assembly 320 includes a feeding roller 321a, a receiving roller 322a, a first driving member 323a for driving the feeding roller 321a to move left and right, and a second driving member 324a for driving the receiving roller 322a to move left and right. The diaphragm is sequentially wound around the feeding roller 310, the feeding roller 321a, the receiving roller 322a, and the transition roller 330.
[0027] Positionally, the feeding roller 321a and the receiving roller 322a are located on the left and right sides of the feeding roller 310, respectively. In this embodiment, the feeding roller 321a is located on the right side of the feeding roller 310, and the receiving roller 322a is located on the left side of the feeding roller 310. There are three transition rollers 330. After the tension of the diaphragm is adjusted by the tension adjustment mechanism 200, it enters vertically and is wound around the feeding roller 310. The feeding roller 310 guides the diaphragm so that it travels horizontally to the right and is wound around the feeding roller 321a. After passing the feeding roller 321a, the diaphragm travels horizontally to the left and passes through two transition rollers 330, and then is wound around the receiving roller 322a. After passing the receiving roller 322a, the diaphragm travels horizontally to the right and is wound around another transition roller 330. Finally, the diaphragm is guided by another transition roller 330 so that it enters the film stretching mechanism 400 vertically.
[0028] Specifically, the buffering process includes buffer feeding, diaphragm feeding for stacking, and diaphragm collection after stacking.
[0029] Among them, buffer feeding: the diaphragm is conveyed by the feed roller 310 to the feed roller 321a, and the first driving member 323a drives the feed roller 321a to move to the right to buffer the diaphragm feeding.
[0030] The diaphragm feeding required for stacking: The first driving member 323a drives the feeding roller 321a to move to the left, and drives the diaphragm to move to the left and pass through the two transition rollers 330; when the stacking mechanism 500 receives feedback that the amount of diaphragm is sufficient, the first driving member 323a drives the feeding roller 321a to reset to the right, so that the diaphragm resets to the right.
[0031] After stacking, the diaphragm is collected: the second drive unit 324a drives the collection roller 322a to move to the left from the current position and pulls the diaphragm to the left. At this time, the diaphragm that has passed through the two transition rollers 330 is tensioned and does not move. The diaphragm that has passed through the other transition roller 330 group is conveyed back in a direction away from the stacking mechanism 500, thereby realizing the collection of the diaphragm.
[0032] Preferably, the first driving component 323a and the second driving component 324a have the same structure. The first driving component 323a includes a servo motor and a lead screw transmission module. The servo motor drives the lead screw transmission module to drive the feeding roller 321a or the receiving roller 322a to move horizontally. Thus, the moving distance of the feeding roller 321a or the receiving roller 322a can be precisely controlled, and the buffering accuracy can be improved.
[0033] Preferably, it also includes a film pressing mechanism 600, which is located between the buffer mechanism 300 and the film pulling mechanism 400. The film pressing mechanism 600 includes a film pressing assembly 610 and a fourth driving member 620 for driving the film pressing assembly 610 to move up and down. The film pressing assembly 610 includes two pressure rollers 611, and the diaphragm is inserted between the two pressure rollers 611, so that the diaphragm can be smoothed out, avoiding wrinkles in the diaphragm and improving the quality of the diaphragm.
[0034] Moreover, by setting a fourth driving component 620, which drives the membrane pressing assembly 610 to move up and down, on the one hand, it can adapt to membranes of different thicknesses, widths or materials, improve the flexibility and adaptability of the equipment, reduce changeover time, improve production efficiency, and meet the needs of diversified products. On the other hand, it can also precisely control the tension of the membrane, ensuring that the membrane is not overstretched or loosened during the stacking process, thereby ensuring the stability of the stacking quality.
[0035] Preferably, the unwinding mechanism 100 includes a first unwinding assembly 110, a second unwinding assembly 120, and a tape-connecting assembly 130. The tape-connecting assembly 130 is located between the first unwinding assembly 110 and the second unwinding assembly 120. The first unwinding assembly 110 is used to release the first diaphragm, the second unwinding assembly 120 is used to release the second diaphragm, and the tape-connecting assembly 130 is used to combine the first diaphragm and the second diaphragm to form a working diaphragm. This improves the strength and durability of the working diaphragm, enabling it to withstand higher pressure and temperature and to be less prone to breakage or deformation, thereby increasing the battery's lifespan.
[0036] Furthermore, a roll diameter detection module 140 is provided on one side of both the first unwinding assembly 110 and the second unwinding assembly 120. The roll diameter detection module 140 is used to detect the outer diameter of the diaphragm roll and can monitor the diameter change of the diaphragm roll in real time, providing data support for production management. When the diameter of the diaphragm roll changes abnormally, there may be a fault in the equipment or a problem with the quality of the diaphragm material. At this time, the system can issue an early warning signal, thereby reminding the operator to check and troubleshoot the fault in time.
[0037] Furthermore, a tension detection module 210 is provided between the unwinding mechanism 100 and the tension adjustment mechanism 200. The tension detection module 210 is used to detect the tension of the diaphragm belt after unwinding. The tension adjustment mechanism 200 can accurately adjust the tension of the diaphragm belt during belt travel based on the real-time data detected by the tension detection module 210, thereby ensuring that the diaphragm is not overstretched or loosened during belt travel and improving the quality of the diaphragm.
[0038] Example 2
[0039] Reference Figure 2 The difference between this embodiment and Embodiment 1 is that the position of the receiving roller 322a is different.
[0040] Specifically, the feeding roller 321a and the receiving roller 322a are both located on the same side of the feed roller 310. In this embodiment, the feeding roller 321a and the receiving roller 322a are both located on the right side of the feed roller 310. Moreover, there are two transition rollers 330. After the tension of the diaphragm is adjusted by the tension adjustment mechanism 200, it enters vertically and is wound around the feed roller 310. The feed roller 310 guides the diaphragm so that it travels horizontally to the right and is wound around the feeding roller 321a. After passing the feeding roller 321a, the diaphragm travels horizontally to the left and is wound around one of the transition rollers 330. After passing one of the transition rollers 330, the diaphragm travels horizontally to the right and is wound around the receiving roller 322a. After passing the receiving roller 322a, the diaphragm travels horizontally to the left and is wound around the other transition roller 330. Finally, the other transition roller 330 guides the diaphragm so that it enters the film stretching mechanism 400 vertically.
[0041] Specifically, the buffering process includes buffer feeding, diaphragm feeding for stacking, and diaphragm collection after stacking.
[0042] Among them, buffer feeding: the diaphragm is conveyed by the feed roller 310 to the feed roller 321a, and the first driving member 323a drives the feed roller 321a to move to the right to buffer the diaphragm feeding.
[0043] The diaphragm feeding required for stacking: The first driving member 323a drives the feeding roller 321a to move to the left, and drives the diaphragm to move to the left and pass through the two transition rollers 330; when the stacking mechanism 500 receives feedback that the amount of diaphragm is sufficient, the first driving member 323a drives the feeding roller 321a to reset to the right, so that the diaphragm resets to the right.
[0044] After stacking, the diaphragm is collected: the second drive unit 324a drives the collection roller 322a to move to the right from its current position and pulls the diaphragm to the right. At this time, the diaphragm that has passed through the upper transition roller 330 is tensioned and remains stationary. The diaphragm that has passed through the other transition roller 330 group is conveyed back in a direction away from the stacking mechanism 500, thereby realizing the collection of the diaphragm.
[0045] Example 3
[0046] Reference Figure 3 The difference between this embodiment and embodiment 1 is that the feeding roller 321a and the receiving roller 322a are combined into a single feeding and receiving roller 321b.
[0047] Specifically, the take-up and feed assembly 320 includes a take-up and feed roller 321b and a third drive member 322b for driving the take-up and feed roller 321b to move left and right. The take-up and feed roller 321b is located on one side of the feed roller 310, and there are two transition rollers 330.
[0048] After the tension of the diaphragm is adjusted by the tension adjustment mechanism 200, it is vertically conveyed and passes through the feed roller 310 and one of the transition rollers 330 in sequence. One of the transition rollers 330 guides the diaphragm so that it travels horizontally to the right and is wrapped around the take-up and unload roller 321b. After passing the take-up and unload roller 321b, the diaphragm travels horizontally to the left and is wrapped around another transition roller 330. Finally, the other transition roller 330 guides the diaphragm so that it enters the film stretching mechanism 400 vertically.
[0049] Specifically, the buffering process includes buffer feeding, diaphragm feeding for stacking, and diaphragm collection after stacking.
[0050] Among them, buffer feeding: the diaphragm is transported by the feed roller 310 to the transition roller 330 and pulled by the take-up and unload roller 321b. The third drive member 322b drives the take-up and unload roller 321b to move to the right to buffer the diaphragm feeding.
[0051] The diaphragm is fed out as follows: The third drive unit 322b drives the take-up and feed roller 321b to move to the left, and the diaphragm is continuously conveyed downward through the transition roller 330 below for diaphragm feeding; when the stacking mechanism 500 receives feedback that the amount of diaphragm is sufficient, the third drive unit 322b drives the take-up and feed roller 321b to move to the right to the origin, so that the diaphragm is reset to the right.
[0052] After stacking, the diaphragm is collected: the third drive unit 322b drives the take-up and feed rollers 321b to continue moving to the right from the origin. At this time, the diaphragm that has passed through the upper transition roller 330 is tensioned and remains stationary, while the diaphragm that has passed through the lower transition roller 330 is conveyed back in a direction away from the stacking mechanism 500, thereby realizing the collection of the diaphragm.
[0053] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A diaphragm unwinding device, characterized in that, The battery includes an unwinding mechanism, a tension adjustment mechanism, a buffer mechanism, a film pulling mechanism, and a stacking mechanism. The unwinding mechanism is used to release the separator from the roll. The tension adjustment mechanism is used to adjust the tension of the separator. The buffer mechanism is used to buffer the separator. The film pulling mechanism is used to pull the separator. The stacking mechanism is used to move the separator back and forth to form a Z-shaped separator and to alternately stack positive and negative electrode sheets between the Z-shaped separator to form a battery cell. The buffer mechanism includes a feed roller, a take-up and unload assembly, and several transition rollers. The take-up and unload assembly is used to buffer the feed, stacking, and take-up of the separator. The transition rollers are used to support and guide the separator.
2. The diaphragm unwinding device according to claim 1, characterized in that, The feeding and receiving assembly includes a feeding roller, a receiving roller, a first driving member for driving the feeding roller to move left and right, and a second driving member for driving the receiving roller to move left and right. A diaphragm is sequentially wound around the feeding roller, the feeding roller, the receiving roller, and the transition roller.
3. The diaphragm unwinding device according to claim 2, characterized in that, The feeding roller and the receiving roller are located on the left and right sides of the feeding roller, respectively.
4. The diaphragm unwinding device according to claim 2, characterized in that, The feeding roller and the receiving roller are both located on the same side of the feed roller.
5. A diaphragm unwinding device according to claim 2, characterized in that, The first driving component and the second driving component have the same structure. The first driving component includes a servo motor and a lead screw transmission module, and the feeding roller is connected to the lead screw transmission module.
6. The diaphragm unwinding device according to claim 1, characterized in that, The take-up and feed assembly includes a take-up and feed roller and a third drive unit for driving the take-up and feed roller to move left and right. The take-up and feed roller is located on one side of the feed roller.
7. The diaphragm unwinding device according to claim 1, characterized in that, It also includes a film pressing mechanism, which is located between the buffer mechanism and the film pulling mechanism. The film pressing mechanism includes a film pressing assembly and a fourth driving member for driving the film pressing assembly to move up and down. The film pressing assembly includes two pressure rollers, and the diaphragm passes between the two pressure rollers.
8. A diaphragm unwinding device according to claim 1, characterized in that, The unwinding mechanism includes a first unwinding assembly, a second unwinding assembly, and a tape-connecting assembly. The tape-connecting assembly is located between the first unwinding assembly and the second unwinding assembly. The first unwinding assembly is used to release the first diaphragm, the second unwinding assembly is used to release the second diaphragm, and the tape-connecting assembly is used to combine the first diaphragm and the second diaphragm to form a working diaphragm.
9. A diaphragm unwinding device according to claim 8, characterized in that, Both the first unwinding assembly and the second unwinding assembly are provided with a roll diameter detection module on one side, which is used to detect the outer diameter of the diaphragm roll.
10. A diaphragm unwinding device according to claim 1, characterized in that, A tension detection module is provided between the unwinding mechanism and the tension adjustment mechanism. The tension detection module is used to detect the tension of the diaphragm belt after unwinding.