Lithium battery diaphragm coating and winding equipment
By adopting automated turret and winding shaft switching technology in lithium battery separator winding equipment, combined with cutter and pressure roller assemblies, the problems of downtime and manual operation during roll changing are solved, achieving efficient and low-cost film roll changing, and improving production efficiency and equipment capacity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI FORESIGHT SMART EQUIP CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-05-12
AI Technical Summary
Existing lithium battery separator winding equipment requires machine shutdown and manual operation when changing rolls, resulting in low production efficiency, large errors, and high equipment costs.
The system employs a rotatable turret and automatic winding shaft switching, combined with a cutter and pressure roller assembly to achieve roll changing without stopping or slowing down the machine. The film material is cut and bonded through an automated system, and the flattening roller and proximity roller are used to keep the film material flat. The tension detection roller adjusts the tension in real time.
It enables rapid and accurate roll changing without stopping the machine or slowing down, improving equipment capacity, reducing economic losses caused by manual roll changing, and significantly reducing equipment processing costs.
Smart Images
Figure CN224226301U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium-ion battery separator coating technology, specifically a lithium battery separator coating and winding device. Background Technology
[0002] In the coating and production of lithium-ion battery separators, the winding process is a crucial step. Tension control, sustained stability during high-speed winding, and uninterrupted, non-decelerating roll changes during high-speed production are all complex and critical processes. Existing lithium-ion battery separator production and winding equipment typically operates at speeds of around 100 meters per minute to ensure stability. While this significantly increases production speed while maintaining consistent quality, roll changes require machine shutdown and manual operation. Manual roll changes are inefficient, prone to errors due to downtime, impacting production efficiency and potentially leading to scrapped rolls. Furthermore, the equipment operating costs are high. Utility Model Content
[0003] This invention provides a lithium battery separator coating and winding device that can solve various problems caused by the need to stop the machine and manually change the roll when changing the roll in existing winding devices.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery separator coating and winding device, comprising: a film material conveying and guiding assembly, a fixed plate installed on one side of the film material conveying and guiding assembly, the fixed plate being driven to slide left and right by a proximity drive component on its left side, a pressure roller and a cutter that can be driven to extend to the right by a power component installed on the fixed plate, a rotatable turret installed on the right side of the fixed plate, a first winding shaft and a second winding shaft respectively installed at opposite ends of the turret, the film material being wound around the first winding shaft or the second winding shaft along the film material conveying and guiding assembly, by setting a rotatable turret, a first winding shaft and a second winding shaft, the first winding shaft and the second winding shaft can be automatically switched positions, and the film material during the winding is pressed by the roll changing pressure roller assembly, so that the film material is stuck to the new empty roll, and at the same time the corresponding cutter is used to cut the film material during the winding, so as to realize the rapid and accurate completion of substrate unloading and winding work without stopping the machine or slowing down, greatly improving the production capacity of the equipment.
[0005] Preferably, the pressure roller is mounted on the fixed plate by a slider and can be driven to extend to the right by a power component on one side. The pressure roller can be driven to move horizontally by the power component, thus enabling the pressure roller to move independently.
[0006] Preferably, a flattening roller and a proximity roller are also installed on the fixed plate from left to right below the pressure roller and the cutter. The film material passes over the flattening roller and the proximity roller in sequence and is then wound onto the first or second take-up shaft. The cutter, pressure roller, proximity roller, and flattening roller are combined into a module and assembled on the same fixed plate for unified movement, which greatly reduces the processing cost of the equipment. When the film material passes through the flattening roller, the film material can be kept flat during take-up. The proximity roller can adjust the gap between the roller and the roll and continuously stabilize the size of the gap, thereby stabilizing the air intake during film take-up and stabilizing the quality of take-up.
[0007] Preferably, both sides of the turret are equipped with cutting back rollers that can extend toward the first or second winding shaft. The cutting back rollers extend when changing the film material to reduce the roller spacing at the cutting position, and retract during production and do not participate in production.
[0008] Preferably, the turret is equipped with multiple turret guide rollers at a position between the first and second take-up shafts. The turret guide rollers can straighten and guide the film material connecting the first and second take-up shafts during roll changing, so as to maintain the tension of the film material and facilitate cutting by the cutter.
[0009] Preferably, the membrane material conveying and guiding assembly includes a tension detection roller, a swing roller, and multiple membrane material guide rollers arranged in combination. The swing roller is maintained by a low-friction cylinder to maintain thrust. The tension detection roller can detect the tension in real time, thereby adjusting the tension to achieve stable material collection. The low-friction cylinder of the swing roller is equipped with a pressure regulating valve, and with its own weight, it can stabilize the tension during membrane material collection, cutting, and roll switching.
[0010] Preferably, the proximity drive component is an electric cylinder, which can ensure the precise movement of the fixed plate.
[0011] Preferably, the power components that drive the cutting blade and pressure roller to move are both cylinders, which are suitable for rapid movement over short distances.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] By setting up a rotatable turret, a first take-up shaft, and a second take-up shaft, the positions of the first and second take-up shafts can be automatically switched. The film material during the roll change is pressed down by the roll-changing pressure roller assembly, so that the film material is adhered to the new empty roll. At the same time, the corresponding cutter cuts the film material during the roll change, realizing the fast and accurate completion of substrate feeding and roll changing without stopping the machine or slowing down, which greatly improves the production capacity of the equipment. The entire take-up process is operated by the system in a fully automatic manner, reducing the economic losses caused by downtime, deceleration, and errors due to manual roll changing. The cutter, pressure roller, approach roller, and flattening roller are combined into a module and assembled on the same fixed plate for unified movement, which greatly reduces the processing cost of the equipment. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the unloading process of the winding device of this utility model;
[0015] Figure 2 This is a schematic diagram of the winding and cutting process of the rewinding equipment of this utility model.
[0016] Figure label:
[0017] 1. Cutting blade, 11. First winding shaft, 12. Second winding shaft, 13. Turret, 14. Membrane material, 2. Pressure roller, 3. Approach roller, 4. Flattening roller, 5. Fixing plate, 6. Approach drive component, 7. Swing roller, 8. Membrane material guide roller, 9. Tension detection roller, 10. Cutting back roller. Detailed Implementation
[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0019] This utility model aims to solve various problems caused by the need for machine downtime and manual roll changing in existing winding equipment. For example... Figure 1-2As shown, the following technical solution is provided: a lithium battery separator coating and winding device, comprising: a film material conveying and guiding assembly, a fixed plate 5 installed on one side of the film material conveying and guiding assembly, the fixed plate 5 being driven to slide left and right by a proximity drive component 6 on its left side, a pressure roller 2 and a cutter 1 that can be driven to extend to the right by a power component installed on the fixed plate 5, a rotatable turret 13 installed on the right side of the fixed plate 5, a first winding shaft 11 and a second winding shaft 12 respectively installed at opposite ends of the turret 13, the film material 14 along... The membrane material conveying and guiding assembly is wound on the first take-up shaft 11 or the second take-up shaft 12. By setting a rotatable turret 13, the first take-up shaft 11 and the second take-up shaft 12, the positions of the first take-up shaft 11 and the second take-up shaft 12 can be automatically switched. The membrane material during the roll change is pressed by the roll changing pressure roller assembly, so that the membrane material is stuck to the new empty roll. At the same time, the corresponding cutter 1 is used to cut the membrane material 14 during the roll change. This enables the substrate feeding and roll changing work to be completed quickly and accurately without stopping the machine or slowing down, which greatly improves the production capacity of the equipment.
[0020] Specifically, existing equipment requires a 15-30 minute downtime for roll changing, which is time-consuming and prone to wasting film material, as approximately 300-500 meters of film are wasted each time the machine stops. In this embodiment, the automatic turret switching and synchronous cutting technology reduces the roll changing time to less than 30 seconds, and eliminates the need for machine downtime to reduce speed.
[0021] In this embodiment, the pressure roller 2 is mounted on the fixed plate 5 via a slider and can be driven to extend to the right by a power component on one side. The pressure roller 2 can be driven to move horizontally by the power component, thus enabling the independent movement of the pressure roller 2. The surface of the pressure roller 2 is covered with silicone. Driven to move to the right by a cylinder, it presses the film material 14 onto the surface of the second take-up shaft 12. At the same time, the second take-up shaft 12 rotates synchronously at a linear speed of 200 meters per minute. The pressure of the pressure roller cylinder is equipped with a pressure regulating valve, and the pressure is adjustable to prevent damage to the film material.
[0022] In this embodiment, a flattening roller 4 and a proximity roller 3 are installed on the fixed plate 5 from left to right below the pressure roller 2 and the cutter 1. The film material 14 passes over the flattening roller 4 and the proximity roller 3 in sequence and is then wound onto the first winding shaft 11 or the second winding shaft 12. The cutter 1, pressure roller 2, proximity roller 3, and flattening roller 4 are combined into a module and assembled on the same fixed plate 5 for unified movement, which greatly reduces the processing cost of the equipment. When the film material 14 passes through the flattening roller 4, the film material can be kept flat during winding. The proximity roller 3 can adjust the gap between the roller and the roll and continuously stabilize the size of the gap, thereby stabilizing the air intake of the film material 14 during winding and stabilizing the quality of winding. Specifically, the flattening roller 4 is chrome-plated with a mirror finish, and the gap of the proximity roller 3 is automatically adjusted to ensure that the flatness error of the winding end face of the film material is ≤0.1mm, which meets the flatness requirements of high-end lithium battery separator products.
[0023] In this embodiment, both sides of the turret 13 are equipped with cutting back rollers 10 that can extend toward the first winding shaft 11 or the second winding shaft 12. The cutting back rollers 10 extend when changing the roll of film to reduce the roller spacing at the cutting position, and retract during production and do not participate in production.
[0024] In this embodiment, a plurality of film guide rollers 8 are installed on the turret 13 between the first take-up shaft 11 and the second take-up shaft 12. The film guide rollers 8 can straighten and guide the film connecting the first take-up shaft 11 and the second take-up shaft 12 during roll changing, so that the film maintains tension and is convenient for the cutter to cut.
[0025] In this embodiment, the film material conveying and guiding assembly includes a tension detection roller 9, a swing roller 7, and multiple film material guide rollers 8 arranged in combination. The swing roller 7 is maintained by a low-friction cylinder to maintain thrust. The tension detection roller 9 can detect the tension in real time, thereby adjusting the tension to achieve stable material take-up. The low-friction cylinder of the swing roller 7 is equipped with a pressure regulating valve, and with its own weight, it can stabilize the tension during film take-up and cutting. The surface of the tension detection roller 9 is covered with polyurethane rubber to detect the tension value in real time and feed it back to the servo motor through the PLC system to dynamically adjust the winding speed.
[0026] In this embodiment, the proximity drive component 6 is an electric cylinder, which can ensure the accuracy of the movement of the fixed plate 5. In addition, the power components that drive the cutting blade 1 and the pressure roller 2 to move are both pneumatic cylinders, which are suitable for rapid movement over short distances.
[0027] In this embodiment, the working process is as follows: the film material 14 passes through the tension detection roller 9, which can detect the tension in real time and adjust the tension accordingly to achieve stable material taking; the film material 14 passes through the swing roller 7, which is pushed by a low-friction cylinder and, together with its own weight, can maintain the tension during film taking and cutting; the film material 14 passes through the flattening roller 4 to ensure the flatness of the film material during taking; the film material passes through the approach roller 3, which can adjust the gap between the roller and the roll and continuously stabilize the size of the gap, thereby stabilizing the air intake of the film material and stabilizing the quality of taking; the first take-up shaft 11 is driven by a servo motor, which adjusts the speed and torque in real time to ensure that the roll core can rotate stably for taking.
[0028] When the diameter of the first take-up shaft 11 reaches the production requirement, the second take-up shaft 12 needs to be rolled empty. The first take-up shaft 11 is rotated from the inside to the outside by the turret 13, and the second take-up shaft 12 is rotated from the turret 13 to the inside. The cutting back roller 10 extends, reducing the roller spacing at the cutting position. The pressure roller (2) presses down, causing the film material 14 to stick to the second take-up shaft 12 rotating at the same speed. The cutter 1 cuts the film material 14 connected to the first take-up shaft 11, thus completing the roll change. After the roll change is completed, the cutter 1, pressure roller 2, cutting back roller 10, and approach roller 3 are all returned to their positions, and the second take-up shaft 12 continues the production and material collection work. The entire roll change process is fully automated by the system, while loading and unloading are done manually.
[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0030] Furthermore, in this utility model, descriptions involving terms such as "primary," "secondary," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "primary" or "secondary" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.
[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0032] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
Claims
1. A lithium battery separator coating and winding device, comprising: A membrane material conveying and guiding assembly is characterized in that a fixed plate (5) is installed on one side of the membrane material conveying and guiding assembly, the fixed plate (5) is driven to slide left and right by a proximity drive component (6) on its left side, a pressure roller (2) and a cutter (1) that can be driven to extend to the right by a power component are installed on the fixed plate (5), a rotatable turret (13) is installed on the right side of the fixed plate (5), a first take-up shaft (11) and a second take-up shaft (12) are respectively installed at opposite ends of the turret (13), and the membrane material (14) is wound around the first take-up shaft (11) or the second take-up shaft (12) along the membrane material conveying and guiding assembly.
2. The lithium battery separator coating and winding equipment according to claim 1, characterized in that: The pressure roller (2) is mounted on the fixed plate (5) by a slider and can be driven to extend to the right by a power component on one side.
3. The lithium battery separator coating and winding equipment according to claim 2, characterized in that: The fixed plate (5) is also equipped with a flattening roller (4) and a proximity roller (3) from left to right on the lower side of the pressure roller (2) and the cutter (1). The film material (14) passes around the flattening roller (4) and the proximity roller (3) in sequence and is then wound around the first take-up shaft (11) or the second take-up shaft (12).
4. The lithium battery separator coating and winding equipment according to claim 3, characterized in that: The turret (13) is equipped with cutting back rollers (10) on both sides near the first take-up shaft (11) and the second take-up shaft (12), which can extend toward the first take-up shaft (11) or the second take-up shaft (12).
5. The lithium battery separator coating and winding equipment according to claim 1, characterized in that: Multiple turret rollers (8) are installed on the turret (13) between the first take-up shaft (11) and the second take-up shaft (12).
6. The lithium battery separator coating and winding equipment according to any one of claims 1-5, characterized in that: The membrane material conveying and guiding assembly includes a tension detection roller (9), a swing roller (7), and multiple membrane material guiding rollers (8) arranged in combination. The swing roller (7) is held in thrust by a low-friction cylinder.
7. The lithium battery separator coating and winding equipment according to claim 1, characterized in that: The proximity drive component (6) is an electric cylinder.
8. The lithium battery separator coating and winding equipment according to claim 2, characterized in that: The power components that drive the cutting blade (1) and the pressure roller (2) to move are both cylinders.