Winding device for outer protective film of battery cell

Abstract

The invention belongs to the technical field of batteries, and particularly relates to a battery cell outer protective film winding device which comprises an operation table, two side plates, a shaft rod, a roller, a protective film roll, a film pulling mechanism, a moving mechanism and a rotating mechanism. The two side plates are fixed to the two sides of the winding platform, positioning notches are formed in the tops of the side plates, the shaft rod is supported between the two positioning notches and rotationally connected with the positioning notches, the roller is fixedly arranged on the shaft rod in a sleeving mode, the protective film roll is wound around the roller, and the film pulling mechanism is arranged on the winding platform and corresponds to the protective film roll in position. And the moving mechanism is arranged on one side of the winding platform. According to the invention, the wound protective film is uniformly scraped without influencing the winding of the protective film on the battery cell, so that the situation that the wrapping is not tight and the battery cell cannot be effectively fixed due to the damage of the self-adhesion of the protective film caused by the wrinkles of the protective film in the winding process is prevented.

Description

Technical Field

[0001] This invention relates to the field of batteries, and more particularly to a device for wrapping a protective film around a battery cell. Background Technology

[0002] A battery cell refers to a single electrochemical cell containing positive and negative electrodes. It is generally not used directly and is usually wrapped with a protective film to protect it.

[0003] A search revealed Chinese patent application CN114512703A, which discloses a battery cell protective film wrapping device. The device includes a housing with two symmetrically arranged connecting blocks inside. Each connecting block has a connecting disc rotatably connected to its opposite side. An electric push rod is fixed to the connecting disc, and a rotating disc is fixed to the piston rod end of the electric push rod. The two rotating discs together hold the battery cell. A cutting disc is fixedly fitted onto the surface of the rotating disc. A mounting plate is fixed in the middle of the housing, with a film-applying opening on its surface. A film-feeding mechanism is located below the mounting plate, and extrusion and cutting mechanisms are located on both sides of the film-applying opening. This solution achieves the wrapping function by having the battery cell roll and wrap around the protective film surface, and by using a cutting blade to pre-cut the protective film on both sides, allowing the battery cell to wrap and apply the protective film from the rear. The operation is simple, eliminating the need for repeated manual flipping, and is beneficial for mechanized production.

[0004] Existing devices typically rotate the battery cell to wrap the protective film around it when wrapping the protective film around the cell. However, during the wrapping process, the protective film will wrinkle, which will destroy the self-adhesiveness of the protective film, resulting in a loose wrapping and inability to effectively fix the battery cell. At the same time, wrinkles may cause uneven thickness of the protective film in some areas, which will not be able to evenly buffer external impacts and reduce the protective effect on the battery cell. Summary of the Invention

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A battery cell protective film winding device includes an operating platform, two side plates, a shaft, a roller, a protective film roll, a film pulling mechanism, a moving mechanism, and a rotating mechanism. The operating platform has a feeding platform and a winding platform on its top. The two side plates are fixed to both sides of the winding platform and have positioning slots on their tops. The shaft is supported between the two positioning slots and rotatably connected to them. The roller is fixedly sleeved on the shaft, and the protective film roll is wound onto the roller. The film pulling mechanism is located on the winding platform and corresponds to the position of the protective film roll. The moving mechanism is located on one side of the winding platform. The rotating mechanism is located on both sides of the moving mechanism and has a scraping mechanism on its top. The rotating mechanism includes two crossbars, two fixed plates, two rotating shafts, and two third hydraulic cylinders. The system comprises a rotating motor and two side clamps, two crossbars fixed to both sides of the moving mechanism, two fixed plates slidably connected to the winding platform, a rotating shaft rotatably connected to the fixed plates via bearings, a third hydraulic cylinder fixed to one end of the rotating shaft, two side clamps fixed to one side of the third hydraulic cylinder and equipped with position sensors, a rotating motor fixed to one side of one of the fixed plates and connected to the rotating shaft, and a scraping mechanism including a transmission component, two support plates, a rotating rod, a connecting sleeve, two scrapers and multiple deflection springs. The two support plates are fixed to the fixed plates, the two ends of the rotating rod are rotatably connected to the support plates, the connecting sleeve is fixedly sleeved on the rotating rod, the two scrapers are symmetrically arranged on both sides of the connecting sleeve via deflection springs and their initial position is tangent to the top of the battery cell, and the rotating rod is connected to another rotating shaft via a transmission component.

[0006] Preferably, the transmission component is a chain drive.

[0007] Preferably, limiting rings are fixedly sleeved on both sides of the shaft, the two limiting rings are fitted to the outside of the positioning groove, and the contact surface between the limiting rings and the side plate is provided with a friction layer.

[0008] Preferably, the film stretching mechanism includes a second hydraulic cylinder, a connecting plate, two fixing clamps, two clamping push rods, and a clamping plate. The second hydraulic cylinder is fixed on the winding platform and its top is connected to the connecting plate. The two fixing clamps are symmetrically fixed on both sides of the top of the connecting plate. The clamping push rods are fixed to the inner wall of the fixing clamps and their telescopic ends are connected to the clamping plates.

[0009] Preferably, the moving mechanism includes a moving rail, a screw, a screw motor, and a moving block. The two ends of the screw are rotatably connected to the moving rail. The moving block is slidably connected to the moving rail and has a threaded opening that engages with the screw thread. The screw motor is fixed to one side of the moving rail and connected to the screw. Guide openings are provided on both sides of the moving rail. A crossbar is slidably connected to the guide opening and fixed to the side of the moving block.

[0010] Preferably, the feeding platform is provided with a feeding mechanism, which includes two support plates, multiple pull rods, two limit plates, multiple limit bolts, a connecting seat, a first hydraulic cylinder, and a push plate. The two support plates are fixed on both sides of the feeding platform and have pull-out openings. The pull rods are slidably connected in the pull-out openings and connected to the limit plates. The top of the support plate is provided with a threaded hole that is threaded to the limit bolts. The bottom of the limit bolts is pressed against the pull rods. The top of the two limit plates is provided with limit grooves. The connecting seat is fixed on the feeding platform. The two ends of the first hydraulic cylinder are connected to the push plate and the connecting seat, respectively.

[0011] Preferably, the supporting surface of the limiting groove is an inclined surface, and the height of the inclined surface gradually increases along the moving direction of the push plate.

[0012] Preferably, a position sensor is provided on one side of the side clamp to identify the movement position of the battery cell and control the third hydraulic cylinder to drive the side clamp to hold the battery cell.

[0013] Preferably, the scraper is deflected by a deflection spring under the pressure of the battery cell, so as to scrape the wound protective film evenly when the battery cell rotates.

[0014] The beneficial effects of this invention are as follows: 1. This invention, through the provision of a film-pulling mechanism, a moving mechanism, a rotating mechanism, and a scraping mechanism, allows for the following process: When wrapping the protective film around a battery cell, the film-pulling mechanism is activated, moving upwards to clamp and fix one end of the protective film roll. After fixing, the film-pulling mechanism is activated again, causing one end of the protective film to move downwards. At this point, the battery cell is placed on the loading platform and pushed to one side of the protective film, thus attaching the protective film to the battery cell. When the position sensor detects the battery cell, the third hydraulic cylinder moves the side clamp, clamping and fixing it to the side of the battery cell. Simultaneously, the rotating motor is activated, causing the battery cell to rotate, thus wrapping the protective film around the battery cell. During this process, the transmission component rotates synchronously with the rotating mechanism, and the rotating component also drives the rotating rod to rotate synchronously. Due to the initial movement of the scraper... The scraper is positioned on one side of the battery cell and tangent to its top. Therefore, when the protective film begins to wrap around the battery cell, the scraper will smooth the protective film to prevent wrinkles during wrapping. As the rotating mechanism drives the battery cell to rotate, the scraper will act on the battery cell along with its rotation. Under the pressure of the battery cell, the scraper will deflect to one side through the deflection spring. This allows the scraper to smooth the protective film without affecting its wrapping, preventing wrinkles from damaging its self-adhesiveness and resulting in loose wrapping that cannot effectively secure the battery cell. Wrinkles can also cause uneven thickness of the protective film, making it difficult to evenly buffer external impacts and reducing the protective effect on the battery cell. In this application, the smoothing and wrapping of the protective film are carried out simultaneously, which can effectively improve the wrapping effect of the protective film. 2. This invention, through its feeding mechanism, allows for the wrapping of the protective film around the battery cell. During this process, the limiting bolt is turned, and the limiting plate is moved via a pull rod. This adjusts the position between the two limiting plates according to the size of the battery cell, ensuring the stability of the battery cell's movement. After adjustment, the battery cell is placed between the two limiting slots, and the push plate is moved by the first hydraulic cylinder, thus pushing the battery cell for feeding. Since the supporting surface of the limiting slot is inclined, and the height of the inclined surface gradually increases along the direction of the push plate's movement, the battery cell is tilted when it comes into contact with the protective film. This tilting creates a "wedge-shaped" guiding effect between the battery cell and the protective film, making it easier to "align" the protective film and reducing initial misalignment. Furthermore, the tilted position of the battery cell causes the protective film to have a certain "wrap angle" when it contacts the battery cell, pre-adhering to part of the surface. This allows some air to be expelled before formal wrapping, reducing air bubbles and gaps in the final product and improving the tightness of the bond. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the structure of a battery cell outer protective film winding device proposed in this invention; Figure 2 This is a side view of a battery cell outer protective film winding device proposed in this invention; Figure 3 This is a schematic diagram of the main structure of a battery cell outer protective film winding device proposed in this invention; Figure 4 This is a schematic diagram of the feeding mechanism of a battery cell outer protective film winding device proposed in this invention; Figure 5 This is a partial structural schematic diagram of a battery cell outer protective film winding device proposed in this invention; Figure 6 This is a schematic diagram of the film-pulling mechanism of a battery cell outer protective film winding device proposed in this invention; Figure 7 This is a schematic diagram of the moving mechanism, rotating mechanism, and scraping mechanism of the battery cell outer protective film winding device proposed in this invention; Figure 8 This is a schematic diagram of the rotating mechanism of a battery cell outer protective film winding device proposed in this invention; Figure 9 This is a schematic diagram of the scraping mechanism of a battery cell outer protective film winding device proposed in this invention.

[0016] In the attached diagram: 1. Operating platform; 2. Feeding platform; 3. Feeding mechanism; 4. Side plate; 5. Shaft; 6. Protective film roll; 7. Moving mechanism; 8. Winding platform; 9. Rotating mechanism; 10. Scraping mechanism; 11. Film pulling mechanism; 12. Support plate; 13. Pull-out port; 14. Pull-out rod; 15. Limiting plate; 16. Limiting groove; 17. Limiting bolt; 18. Connecting seat; 19. First hydraulic cylinder; 20. Push plate; 21. Roller; 22. Positioning groove; 23. 24. Limiting ring; 25. Second hydraulic cylinder; 26. Connecting plate; 27. Fixing clamp; 28. Clamping plate push rod; 29. ​​Clamping plate; 30. Moving rail; 31. Screw; 32. Screw motor; 33. Moving block; 34. Guide port; 35. Crossbar; 36. Fixing plate; 37. Rotating shaft; 38. Third hydraulic cylinder; 39. Rotating motor; 40. Side clamp; 41. Support plate; 42. Rotating rod; 43. Connecting sleeve; 44. Scraper; 45. Deflection spring; 46. Transmission component. Detailed Implementation

[0017] Example 1, referring to Figures 1-9A battery cell protective film winding device includes an operating platform 1, two side plates 4, a shaft 5, a roller 21, a protective film roll 6, a film pulling mechanism 11, a moving mechanism 7, and a rotating mechanism 9. A feeding platform 2 and a winding platform 8 are respectively arranged on both sides of the top of the operating platform 1. The feeding platform 2 is higher than the winding platform 8. The two side plates 4 are fixed to both sides of the winding platform 8 by bolts. Positioning slots 22 are opened on the top of each side plate 4. The shaft 5 is supported between the two positioning slots 22 and rotatably connected to them. The roller 21 is fixedly sleeved on the shaft 5, and the protective film roll 6 is wound around the roller. On 21, the film pulling mechanism 11 is set on the winding platform 8 and corresponds to the position of the protective film roll 6. The moving mechanism 7 is fixedly set on one side of the winding platform 8, and the rotating mechanism 9 is set on both sides of the moving mechanism 7. The top of the rotating mechanism 9 is provided with a scraping mechanism 10, which scrapes the protective film while not affecting the winding of the battery cell, so as to prevent the protective film from wrinkling during the winding process, damaging the self-adhesiveness of the protective film, resulting in loose wrapping and inability to effectively fix the battery cell. At the same time, wrinkles may cause uneven thickness of the protective film in some areas, which cannot evenly buffer the impact of external force and reduce the protective effect on the battery cell. The rotating mechanism 9 includes two crossbars 34, two fixed plates 35, two rotating shafts 36, two third hydraulic cylinders 37, a rotating motor 38, and two side clamps 39. The two crossbars 34 are fixed to both sides of the moving mechanism 7. The two side plates 39 are fixed to one side of the two fixed plates 35 by bolts. The rotating shafts 36 are rotatably connected to the fixed plates 35 by bearings. The fixed plates 35 are slidably connected to the winding platform 8. The third hydraulic cylinders 37 are fixed to one end of the rotating shafts 36 by bolts. The two side plates 39 are fixed to the third hydraulic cylinders 37 by bolts. On one side, a position sensor is provided on one side of the side plate 39 to identify the movement position of the battery cell. The rotating motor 38 is fixed to one side of one of the fixing plates 35 by bolts. One end of the rotating motor 38 is fixedly connected to one of the rotating shafts 36. When the position sensor detects the battery cell, the third hydraulic cylinder 37 will drive the side plate 39 to move to one side of the battery cell, thereby clamping and fixing the side of the battery cell through the side plate 39, and driving the battery cell to rotate through the rotating motor 38 to wrap the protective film around the battery cell. The scraping mechanism 10 consists of a transmission component 45, two support plates 40, a rotating rod 41, a connecting sleeve 42, two scrapers 43, and multiple deflection springs 44. The two support plates 40 are welded to a fixed plate 35. The two ends of the rotating rod 41 are rotatably connected to the two support plates 40 via bearings. The connecting sleeve 42 is fixedly sleeved on the rotating rod 41. The two scrapers 43 are symmetrically arranged on both sides of the connecting sleeve 42 and fixed to the connecting sleeve 42 via deflection springs 44. The initial position of the scrapers 43 is located on one side of the battery cell and tangent to the top of the battery cell. The rotating rod 41 is connected to another rotating shaft 36 via the transmission component 45. The transmission component 45 rotates with the rotating mechanism 9. The rotating mechanism 9 rotates synchronously with the battery cell. The transmission component 45 rotates simultaneously with the rotating rod 41. Since the scraper 43 is initially positioned on one side of the battery cell and is tangent to the top of the battery cell, when the protective film begins to wrap around the battery cell, the scraper 43 will scrape the protective film evenly to prevent wrinkles from forming during wrapping. When the rotating mechanism 9 drives the battery cell to rotate, the scraper 43 will act on the battery cell as the battery cell rotates. Under the pressure of the battery cell, the scraper 43 will be deflected to one side by the deflection spring 44, so that the scraper 43 can scrape the protective film evenly without affecting the wrapping of the protective film around the battery cell.

[0018] Based on the above, the transmission 45 is either belt drive or chain drive, preferably chain drive. Compared with belt drive, since chain drive relies on meshing rather than friction, it will not cause unstable transmission ratio due to elastic deformation or slippage like belt drive. In addition, chain drive does not require a large tension force, thereby reducing the load on shafts and bearings, making it suitable for higher loads or more compact structural designs.

[0019] In this invention, in order to improve the stability of the protective film winding of the battery cell, limiting rings 23 are fixedly sleeved on both sides of the shaft 5. Both limiting rings 23 are attached to the outside of the positioning groove 22 to prevent the shaft 5 from moving the protective film roll 6 to both sides due to the force of rotation when the battery cell is winding the protective film, which would affect the winding of the battery cell. In addition, in order to prevent the protective film roll 6 from rotating excessively due to inertia and causing the protective film to fall off the protective film roll 6, friction is provided on the contact surface between the limiting ring 23 and the side plate 4 to make the shaft 5 subject to resistance when rotating.

[0020] In this invention, the film stretching mechanism 11 includes a second hydraulic cylinder 24, a connecting plate 25, two fixing clamps 26, two clamping plate push rods 27, and a clamping plate 28. The bottom of the second hydraulic cylinder 24 is fixed to the winding platform 8 by bolts, and its top is connected to the connecting plate 25 by bolts. The two fixing clamps 26 are symmetrically fixed on both sides of the top of the connecting plate 25. The clamping plate push rods 27 are fixed on the inner wall of one side of the fixing clamps 26, and their telescopic ends are connected to the clamping plate 28 by bolts. The telescopic movement of the clamping plate push rods 27 is controlled by electric power.

[0021] In this invention, the moving mechanism 7 includes a moving rail 29, a screw 30, a screw motor 31, and a moving block 32. Both ends of the screw 30 are rotatably connected to the moving rail 29 via bearings. The moving block 32 is slidably connected within the moving rail 29. One side of the moving block 32 has a threaded opening adapted to the screw 30, which is threadedly connected to the screw 30. One side of the moving rail 29 is bolted to the screw motor 31, and one end of the screw motor 31 is fixedly connected to the screw 30. The moving rail 29 has openings on both opposite sides. A guide opening 33 is provided, and a crossbar 34 is slidably connected inside the guide opening 33 and fixed to the side of the moving block 32 by bolts. After the protective film is wrapped around the battery cell, the protective film is manually disconnected. At this time, the moving mechanism 7 is started, and the screw motor 31 drives the screw 30 to rotate, thereby moving the wrapped battery cell to one side for easy removal. After removal, the screw motor 31 reverses, and the rotating mechanism 9 moves to one side of the protective film roll 6 for wrapping the protective film around the next battery cell.

[0022] Example 2, refer to Figures 1-4 A battery cell outer protective film wrapping device, compared with Embodiment 1, has a feeding mechanism 3 on the top of the feeding platform 2 to replace manual feeding and improve the safety of feeding.

[0023] Based on the above, the feeding mechanism 3 includes two support plates 12, multiple pull rods 14, two limit plates 15, multiple limit bolts 17, a connecting seat 18, a first hydraulic cylinder 19, and a push plate 20. The two support plates 12 are fixed to both sides of the feeding platform 2 by bolts. Pull-out openings 13 are provided at both ends of one side of the support plate 12. The pull rods 14 are slidably connected inside the pull-out openings 13. The limit plates 15 are connected to the two pull rods 14 by bolts. Threaded holes are provided on both sides of the top of the support plate 12. The threaded holes are threaded to the limit bolts 17. The bottom of the limit bolts 17 presses against the pull rods 14. Limit grooves 16 are provided on one side of the top of the two limit plates 15. The supporting surface of the limiting groove 16 is an inclined plane, and the height of the inclined plane gradually increases along the direction of movement of the push plate 20. The connecting seat 18 is fixed to the loading platform 2 by bolts. The two ends of the first hydraulic cylinder 19 are connected to the push plate 20 and the connecting seat 18 by bolts. When the protective film is wrapped around the battery cell, the limiting bolt 17 is turned, and the limiting plate 15 is moved by the pull rod 14. The position between the two limiting plates 15 is adjusted according to the size of the battery cell to ensure the stability of the battery cell movement. After the adjustment is completed, the battery cell is placed between the two limiting grooves 16, and the push plate 20 is moved by the first hydraulic cylinder 19 to push the battery cell for loading.

[0024] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A battery cell outer protective film winding device, comprising an operating table (1), two side plates (4), a shaft (5), a roller (21), a protective film roll (6), a film pulling mechanism (11), a moving mechanism (7), and a rotating mechanism (9), wherein the operating table (1) is provided with a feeding platform (2) and a winding platform (8) on the top, the two side plates (4) are fixed on both sides of the winding platform (8) and have positioning slots (22) on the top, the shaft (5) is supported between the two positioning slots (22) and rotatably connected to the positioning slots (22), the roller (21) is fixedly sleeved on the shaft (5), the protective film roll (6) is wound on the roller (21), the film pulling mechanism (11) is provided on the winding platform (8) and corresponds to the position of the protective film roll (6), and the moving mechanism (7) is provided on one side of the winding platform (8), characterized in that, The rotating mechanism (9) is located on both sides of the moving mechanism (7) and has a scraping mechanism (10) on top. The rotating mechanism (9) includes two crossbars (34), two fixed plates (35), two rotating shafts (36), two third hydraulic cylinders (37), a rotating motor (38), and two side clamps (39). The two crossbars (34) are fixed on both sides of the moving mechanism (7). The two fixed plates (35) are slidably connected to the winding platform (8). The rotating shafts (36) are rotatably connected to the fixed plates (35) through bearings. The third hydraulic cylinders (37) are fixed to one end of the rotating shafts (36). The two side clamps (39) are fixed to one side of the third hydraulic cylinders (37) and are equipped with position sensors. The rotating motor... (38) Fixed to one side of one of the fixed plates (35) and connected to the rotating shaft (36), the scraping mechanism (10) includes a transmission component (45), two support plates (40), a rotating rod (41), a connecting sleeve (42), two scrapers (43) and multiple deflection springs (44). The two support plates (40) are fixed on the fixed plate (35), and the two ends of the rotating rod (41) are rotatably connected to the support plates (40). The connecting sleeve (42) is fixedly sleeved on the rotating rod (41). The two scrapers (43) are symmetrically arranged on both sides of the connecting sleeve (42) through the deflection springs (44) and the starting position is tangent to the top of the battery cell. The rotating rod (41) is connected to the other rotating shaft (36) through the transmission component (45).

2. The battery cell outer protective film winding device according to claim 1, characterized in that, The transmission component (45) is a chain drive.

3. The battery cell outer protective film winding device according to claim 1, characterized in that, The shaft (5) is fixedly fitted with limiting rings (23) on both sides. The two limiting rings (23) fit against the outside of the positioning groove (22), and the contact surface between the limiting rings (23) and the side plate (4) is provided with a friction layer.

4. The battery cell outer protective film winding device according to claim 1, characterized in that, The film stretching mechanism (11) includes a second hydraulic cylinder (24), a connecting plate (25), two fixing clamps (26), two clamp push rods (27) and a clamp (28). The second hydraulic cylinder (24) is fixed on the winding platform (8) and its top is connected to the connecting plate (25). The two fixing clamps (26) are symmetrically fixed on both sides of the top of the connecting plate (25). The clamp push rods (27) are fixed on the inner wall of the fixing clamps (26) and their telescopic ends are connected to the clamp (28).

5. The battery cell outer protective film winding device according to claim 1, characterized in that, The moving mechanism (7) includes a moving rail (29), a screw (30), a screw motor (31), and a moving block (32). The two ends of the screw (30) are rotatably connected to the moving rail (29). The moving block (32) is slidably connected to the moving rail (29) and has a threaded opening that is threaded to the screw (30). The screw motor (31) is fixed to one side of the moving rail (29) and connected to the screw (30). Guide openings (33) are provided on both sides of the moving rail (29). A crossbar (34) is slidably connected to the guide opening (33) and fixed to the side of the moving block (32).

6. The battery cell outer protective film winding device according to claim 1, characterized in that, The loading platform (2) is provided with a loading mechanism (3). The loading mechanism (3) includes two support plates (12), multiple pull rods (14), two limit plates (15), multiple limit bolts (17), a connecting seat (18), a first hydraulic cylinder (19), and a push plate (20). The two support plates (12) are fixed on both sides of the loading platform (2) and have pull-out openings (13). The pull rods (14) are slidably connected in the pull-out openings (13) and connected to the limit plates (15). The top of the support plate (12) is provided with a threaded hole that is threaded to the limit bolts (17). The bottom of the limit bolts (17) is pressed against the pull rods (14). The top of the two limit plates (15) is provided with limit grooves (16). The connecting seat (18) is fixed on the loading platform (2). The two ends of the first hydraulic cylinder (19) are connected to the push plate (20) and the connecting seat (18) respectively.

7. A battery cell outer protective film winding device according to claim 6, characterized in that, The supporting surface of the limiting groove (16) is an inclined surface, and the height of the inclined surface gradually increases along the moving direction of the push plate (20).

8. The battery cell outer protective film winding device according to claim 1, characterized in that, The position sensor on one side of the side clamp (39) is used to identify the movement position of the battery cell and control the third hydraulic cylinder (37) to drive the side clamp (39) to clamp the battery cell.

9. A battery cell outer protective film winding device according to claim 1, characterized in that, The scraper (43) is deflected by the deflection spring (44) under the pressure of the battery cell, so as to scrape the protective film wrapped around the battery cell evenly when the battery cell rotates.

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