Lithium battery diaphragm coating and unwinding equipment
By adopting an automatic switching design of a rotatable turret and unwinding shaft in the lithium battery separator coating equipment, combined with a cutting component to achieve automatic roll changing, the problem of machine downtime and manual operation required for roll changing in existing equipment has been solved, thereby 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 coating equipment requires machine shutdown and manual operation when changing rolls, resulting in low production efficiency, high equipment costs, and a tendency to cause errors.
A lithium battery separator coating and unwinding device was designed. It adopts a rotatable turret and an unwinding shaft to automatically switch positions, and achieves automatic cutting through a roll changing pressure roller assembly and a cutting assembly, realizing a roll changing process without stopping the machine or slowing down.
It increased the equipment's capacity, simplified the mechanism design, reduced equipment costs, and enabled stable feeding and cutting/changing at a speed of 200 meters per minute, thereby improving production efficiency.
Smart Images
Figure CN224226295U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium-ion battery separator coating technology, specifically to a lithium battery separator coating unwinding device. Background Technology
[0002] In the coating and production of lithium-ion battery separators, the unwinding process is a crucial step. Tension control, sustained stability during high-speed unwinding, and continuous roll changing without downtime or deceleration during high-speed production are all complex and critical processes. Existing lithium-ion battery separator production and unwinding 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 changing requires machine downtime and manual operation. Manual roll changing is inefficient, involves long downtime, is prone to errors, impacts production efficiency, and increases equipment operating costs. Utility Model Content
[0003] This invention provides a lithium battery separator coating unwinding 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 unwinding devices.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery separator coating and unwinding device, comprising: a film material conveying and guiding assembly; a roll changing pressure roller assembly installed on the right side of the film material conveying and guiding assembly; a clockwise cutting assembly installed on the upper side of the roll changing pressure roller assembly; a counterclockwise cutting assembly installed on the lower side of the roll changing pressure roller assembly; a turret capable of rotating clockwise or counterclockwise on the right side of the roll changing pressure roller assembly; a first unwinding shaft and a second unwinding shaft respectively installed at opposite ends of the turret; and the roll changing pressure roller assembly including a pressure roller positioning cylinder and a cylinder installed on the pressure roller. The pressure roller at the right end of the cylinder is used to transport the film material on the first or second unwinding shaft, bypassing the pressure roller and the film material conveying guide assembly. By setting a rotatable turret, the first and second unwinding shafts can automatically switch positions. The film material is pressed down by the roll-changing pressure roller assembly, so that the film material sticks to the new roll. The film material is automatically cut by the clockwise or counterclockwise cutting assembly during roll changing. This allows for fast and accurate completion of substrate unloading and roll changing without stopping the machine or slowing down, greatly improving the equipment's production capacity.
[0005] Preferably, the clockwise cutting assembly includes a first cutting blade positioning cylinder, a first connecting plate mounted on the extension rod of the first cutting blade positioning cylinder, and a first cutting blade high-speed cylinder mounted on the first connecting plate. A fixing bracket for fixing the first cutting blade is installed on the extension rod of the first cutting blade high-speed cylinder. The cooperation between the first cutting blade positioning cylinder and the first cutting blade high-speed cylinder can enable the first cutting blade to quickly move to the cutting position and extend quickly for cutting.
[0006] Preferably, the first high-speed cutting cylinder is inclined downwards from left to right, so that cutting can be performed from an angle downwards without interference.
[0007] Preferably, the counterclockwise cutting assembly includes a second cutting blade positioning cylinder, a second connecting plate mounted on the extension rod of the second cutting blade positioning cylinder, and a second cutting blade high-speed cylinder mounted on the second connecting plate. A fixing bracket for fixing the second cutting blade is installed on the extension rod of the second cutting blade high-speed cylinder. The cooperation between the second cutting blade positioning cylinder and the second cutting blade high-speed cylinder can enable the second cutting blade to quickly move to the cutting position and extend quickly for cutting.
[0008] Preferably, the second high-speed cutting cylinder is inclined upward from left to right, so that cutting can be performed obliquely upward without interference.
[0009] Preferably, a third connecting plate is installed on the extension rod of the pressure roller positioning cylinder, and a pressure roller cylinder is installed on the third connecting plate. The pressure roller is installed on the extension rod of the pressure roller cylinder. By setting the third connecting plate, the pressure roller can be quickly brought to the cutting position by the pressure roller positioning cylinder. The pressure roller cylinder drives the pressure roller to quickly extend and press the film material, which is both accurate and fast.
[0010] Preferably, the turret is equipped with multiple turret guide rollers at a position between the first unwinding shaft and the second unwinding shaft. The turret guide rollers can straighten and guide the film material connecting the first unwinding shaft and the second unwinding shaft during roll changing, so that the film material maintains tension and is convenient for the cutter to cut.
[0011] Preferably, the film material conveying and guiding assembly includes a conveying roller, a swing roller located on the side of the conveying roller, a tension detection roller located on the upper side of the conveying roller, and an adjusting roller located on the left side of the roll changing pressure roller assembly. The swing roller is held in thrust by a low-friction cylinder to stabilize the tension during production and roll changing processes. The adjusting roller can be adjusted in both the left-right and up-down directions. The conveying direction of the film material can be adjusted by the conveying roller, the tension detection roller can monitor the tension of the film material in real time, and the adjusting roller can adjust the conveying tension of the film material.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] By incorporating a rotatable turret, a first unwinding shaft, and a second unwinding shaft, the positions of the first and second unwinding shafts can be automatically switched. A roll-changing pressure roller assembly presses the film material onto the new roll during roll changing. A clockwise or counter-clockwise cutting assembly automatically cuts the film material during roll changing. This simplifies the cutting module, as both clockwise and counter-clockwise unwinding share a single pressure roller, simplifying the mechanism design and reducing equipment costs. It enables stable unwinding at a speed of 200 meters per minute and roll changing without deceleration, significantly increasing equipment capacity and playing a crucial role in improving the processing speed of coating processes. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the unwinding device of this utility model.
[0015] Figure 2 This is a schematic diagram of the unwinding and cutting device of this utility model.
[0016] Figure label:
[0017] 1. First cutting blade; 11. Tension detection roller; 12. Swing roller; 13. Turret conveyor roller; 14. Film material; 15. First unwinding shaft; 16. Second unwinding shaft; 17. Turret; 18. Conveyor roller; 2. First cutting blade high-speed cylinder; 3. First cutting blade positioning cylinder; 4. Pressure roller; 5. Pressure roller cylinder; 6. Pressure roller positioning cylinder; 7. Second cutting blade; 8. Second cutting blade high-speed cylinder; 9. Second cutting blade positioning cylinder; 10. Adjusting roller; A. Clockwise cutting assembly; B. Counterclockwise cutting assembly. 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 unwinding equipment. For example... Figure 1-2As shown, the following technical solution is provided: a lithium battery separator coating and unwinding device, comprising: a film material conveying and guiding assembly, a roll changing pressure roller assembly installed on the right side of the film material conveying and guiding assembly, a clockwise cutting assembly A installed on the upper side of the roll changing pressure roller assembly, a counterclockwise cutting assembly B installed on the lower side of the roll changing pressure roller assembly, a turret 17 that can rotate clockwise or counterclockwise installed on the right side of the roll changing pressure roller assembly, a first unwinding shaft 15 and a second unwinding shaft 16 respectively installed at opposite ends of the turret 17, and the roll changing pressure roller assembly including a pressure roller positioning cylinder 6 and a cylinder installed on the right side of the pressure roller positioning cylinder 6. The pressure roller 4, the film material 14 on the first unwinding shaft 15 or the second unwinding shaft 16 is conveyed around the pressure roller 4 and the film material conveying guide assembly. By setting a rotatable turret 17, the first unwinding shaft 15 and the second unwinding shaft 16, the first unwinding shaft 15 and the second unwinding shaft 16 can automatically switch positions. The film material 14 during the roll change is pressed by the roll change pressure roller assembly. The film material 14 during the roll change is automatically cut by the clockwise cutting assembly A or the counterclockwise cutting assembly B. The substrate unloading and roll change work can be completed quickly and accurately without stopping the machine or slowing down, which greatly improves the production capacity of the equipment.
[0020] Specifically, the turret 17 is driven by a servo motor and rotates clockwise at an angular velocity of 120° / s, causing the first unwinding shaft 15 to rotate from the inner working position to the outer unloading position, while the fully wound second unwinding shaft 16 rotates to the inner cutting position, with the positioning time controlled within 0.8s.
[0021] As a specific structure of the clockwise cutting assembly A, the clockwise cutting assembly A includes a first cutting blade positioning cylinder 3, a first connecting plate mounted on the extension rod of the first cutting blade positioning cylinder 3, and a first cutting blade high-speed cylinder 2 mounted on the first connecting plate. A fixing bracket for fixing the first cutting blade 1 is mounted on the extension rod of the first cutting blade high-speed cylinder 2. The cooperation between the first cutting blade positioning cylinder 3 and the first cutting blade high-speed cylinder 2 allows the first cutting blade 1 to quickly move to the cutting position and extend for cutting. The first cutting blade high-speed cylinder 2 is inclined downwards from left to right, allowing for downward cutting without interference.
[0022] As a specific structure of the counterclockwise cutting assembly B, the counterclockwise cutting assembly B includes a second cutting blade positioning cylinder 9, a second connecting plate mounted on the extension rod of the second cutting blade positioning cylinder 9, and a second cutting blade high-speed cylinder 8 mounted on the second connecting plate. A fixing bracket for fixing the second cutting blade 7 is mounted on the extension rod of the second cutting blade high-speed cylinder 8. The cooperation between the second cutting blade positioning cylinder 9 and the second cutting blade high-speed cylinder 8 allows the second cutting blade 7 to quickly move to the cutting position and extend for cutting. The second cutting blade high-speed cylinder 8 is inclined upwards from left to right, allowing for cutting from an oblique upward angle without interference.
[0023] In this embodiment, a third connecting plate is installed on the extension rod of the pressure roller positioning cylinder 6, and a pressure roller cylinder 5 is installed on the third connecting plate. The pressure roller 4 is installed on the extension rod of the pressure roller cylinder 5. By setting the third connecting plate, the pressure roller 4 can be quickly brought to the cutting position by the pressure roller positioning cylinder 6. The pressure roller cylinder 5 drives the pressure roller 4 to quickly extend and press the film material 14, which is both accurate and fast.
[0024] Specifically, in the clockwise cutting component A operation: the first cutter positioning cylinder 3 extends 300mm at a speed of 0.5m / s, sending the first cutter 1 to a predetermined position 50mm away from the film material; the pressure roller positioning cylinder 6 drives the pressure roller 4 to the cutting position, and the pressure roller cylinder extends, pressing the film material with pressure to ensure a firm bond between the new and old film materials. The pressure roller cylinder is equipped with a pressure regulating valve to adjust the pressure of the pressure roller and prevent damage to the film material. Then, the first cutter high-speed cylinder 2 extends at a speed of 3m / s, driving the first cutter 1.
[0025] Preferably, a plurality of turret guide rollers 13 are installed on the turret 17 between the first unwinding shaft 15 and the second unwinding shaft 16. The turret guide rollers 13 can straighten and guide the film material 14 connecting the first unwinding shaft 15 and the second unwinding shaft 16 during roll changing, so that the film material 14 maintains tension and is convenient for cutting by the cutter. Specifically, there are two sets of turret guide rollers 13, with two turret guide rollers 13 in each set. The turret guide rollers 13 have a diameter of 100mm and are hard chrome plated on the surface. The tension of the film material is monitored in real time by a tension sensor to ensure that the tension of the film material remains stable when the turret is switched.
[0026] Preferably, the film material conveying and guiding assembly includes a conveying roller 18, a swing roller 12 located on the side of the conveying roller 18, a tension detection roller 11 located on the upper side of the conveying roller 18, and an adjusting roller 10 located on the left side of the roll changing pressure roller assembly. The adjusting roller 10 can be adjusted in both the left-right and up-down directions. The tension detection roller 11 can monitor the tension of the film material 14 in real time. The adjusting roller 10 can adjust the angle of the passing film material slightly to maintain a flat and stable feed of the film material, thus preventing wrinkles or deviation. The swing roller 12 is provided with constant thrust by a low-friction cylinder and equipped with a 0.1 bar precision pressure regulating valve. Combined with the real-time feedback from the tension detection roller 11, the position of the adjusting roller is dynamically adjusted by a PLC control system to control the tension fluctuation of the film material within ±1.5%, ensuring that the flatness error of the film material in the coating process is ≤0.1 mm / m, and significantly reducing the problem of uneven coating thickness caused by unstable tension.
[0027] In this embodiment, when the diameter of the first unwinding shaft 15 decreases to the minimum warning value, the second unwinding shaft 16, which is fully wound, needs to be replaced. The first unwinding shaft 15 is rotated clockwise from the inside to the outside by the turret 17, and the fully wound second unwinding shaft 16 is rotated clockwise from the turret 17 to the inner cutting position. During this process, the film material 14 on the first unwinding shaft 15 passes around the turret roller 13 and comes into close contact with the second unwinding shaft 16. The clockwise cutting assembly A is driven to the pre-cutting position by the first cutting blade positioning cylinder 3. The roll changing pressure roller assembly is driven by the pressure roller positioning cylinder 6. The film material is moved to the pre-pressing position; then, the pressure roller 4 is driven by the pressure roller cylinder 5 to press on the second unwinding shaft 16, so that the film material adheres to the film material on the second unwinding shaft 16. The first cutting blade 1 is driven by the first cutting blade high-speed cylinder 2 to cut the film material connected to the first unwinding shaft 15. After the film is cut, the first cutting blade 1 and the pressure roller 4 are all returned to their positions, and the turret 17 rotates clockwise to make the second unwinding shaft 16 work horizontally, thus completing the roll change process. Production continues with the unloading work from the fully rolled second unwinding shaft 16. The entire process is fully automated by the system, while loading and unloading are done manually.
[0028] In this embodiment, as described above, unwinding can be achieved by clockwise rotation, in which case the outer side of the film material 14 faces upward. During roll changing, the turret 17 rotates clockwise, and the clockwise cutting component A completes the cutting. Alternatively, unwinding can also be achieved by counterclockwise rotation, in which case the two ends of the roll are reversed and fixed. During unwinding, the inner side of the film material 14 faces upward. During roll changing, the turret 17 rotates counterclockwise, and the counterclockwise cutting component B completes the roll changing and cutting. The roll changing and cutting action is the same as the cutting action of the clockwise cutting component A module.
[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 unwinding device, comprising: A membrane material conveying and guiding assembly is characterized in that a roll-changing pressure roller assembly is installed on the right side of the membrane material conveying and guiding assembly, a clockwise cutting assembly (A) is installed on the upper side of the roll-changing pressure roller assembly, a counterclockwise cutting assembly (B) is installed on the lower side of the roll-changing pressure roller assembly, a turret (17) that can rotate clockwise or counterclockwise is installed on the right side of the roll-changing pressure roller assembly, a first unwinding shaft (15) and a second unwinding shaft (16) are respectively installed at opposite ends of the turret (17), the roll-changing pressure roller assembly includes a pressure roller positioning cylinder (6) and a pressure roller (4) installed at the right end of the pressure roller positioning cylinder (6), and the membrane material (14) on the first unwinding shaft (15) or the second unwinding shaft (16) is conveyed around the pressure roller (4) and the membrane material conveying and guiding assembly.
2. The lithium battery separator coating and unwinding equipment according to claim 1, characterized in that: The clockwise cutting assembly (A) includes a first cutting blade positioning cylinder (3), a first connecting plate mounted on the extension rod of the first cutting blade positioning cylinder (3), and a first cutting blade high-speed cylinder (2) mounted on the first connecting plate. A first cutting blade (1) is mounted on the extension rod of the first cutting blade high-speed cylinder (2).
3. The lithium battery separator coating and unwinding equipment according to claim 2, characterized in that: The first high-speed cutting cylinder (2) is inclined downward from left to right.
4. The lithium battery separator coating and unwinding equipment according to claim 1 or 2, characterized in that: The counterclockwise cutting assembly (B) includes a second cutting blade positioning cylinder (9), a second connecting plate mounted on the extension rod of the second cutting blade positioning cylinder (9), and a second cutting blade high-speed cylinder (8) mounted on the second connecting plate. A second cutting blade (7) is mounted on the extension rod of the second cutting blade high-speed cylinder (8).
5. The lithium battery separator coating and unwinding equipment according to claim 4, characterized in that: The second high-speed cutting cylinder (8) is inclined upward from left to right.
6. The lithium battery separator coating and unwinding equipment according to claim 4, characterized in that: A third connecting plate is installed on the extension rod of the pressure roller positioning cylinder (6), and a pressure roller cylinder (5) is installed on the third connecting plate. The pressure roller (4) is installed on the extension rod of the pressure roller cylinder (5).
7. The lithium battery separator coating and unwinding equipment according to claim 1, characterized in that: The turret (17) is equipped with a plurality of turret rollers (13) at a position between the first unwinding shaft (15) and the second unwinding shaft (16).
8. The lithium battery separator coating and unwinding equipment according to claim 6, characterized in that: The membrane material conveying and guiding assembly includes a conveying roller (18), a swing roller (12) located on the side of the conveying roller (18), a tension detection roller (11) located on the upper side of the conveying roller (18), and an adjusting roller (10) located on the left side of the roll changing pressure roller assembly. The swing roller (12) is held in thrust by a low-friction cylinder, and the adjusting roller (10) can be adjusted in position in the left-right direction and the up-down direction.