A coating device for battery production

Abstract

This invention discloses a coating device for battery production, relating to the field of automotive lithium battery technology. The invention includes a processing table and a lithium battery, and further includes a clamping assembly for clamping and fixing the lithium battery placed on the processing table. The clamping assembly includes two movable plates slidably mounted on the processing table, each equipped with a buffer mechanism. The advantages are: this invention can automatically adjust the height of the lithium battery relative to the processing table during the coating process by utilizing changes in clamping force. This avoids rigid contact between the battery and the processing table during subsequent rotational coating, which could affect the coating effect or even cause scratches on the cell casing. It also ensures that the coated lithium battery rests stably on the processing table, and the pressure applied to the coating film remains stable throughout the coating process, ensuring smooth operation and effective coating.

Description

Technical Field

[0001] This invention relates to the field of automotive lithium battery technology, and more particularly to a coating device for battery production. Background Technology

[0002] With the rapid development of the new energy industry, lithium batteries (especially square lithium batteries) have become core energy storage components in new energy vehicles, energy storage systems and other fields due to their advantages such as high energy density, good structural stability and high space utilization.

[0003] In the production process of square lithium batteries, cell coating is a key process to ensure the battery's insulation performance, prevent electrolyte leakage, and improve structural strength. The core of this process is to use pressure rollers to tightly adhere the insulating film to the outer surface of the square cell, ensuring that the film is wrinkle-free, bubble-free, and precisely matches the cell's outline.

[0004] However, due to the obvious edges and planar structure of the square battery cell, during the rotation coating process, its bottom or side edges are prone to rigid contact or friction with the surface of the support workbench, affecting the coating effect, and even causing scratches on the battery cell casing, leading to leakage or short circuit risks in later use. Therefore, it is necessary to design a coating device for battery production. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a coating apparatus for battery production, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A coating apparatus for battery production includes a processing table and a lithium battery, and further includes:

[0008] A clamping assembly is used to clamp and fix a lithium battery placed on a processing table. The clamping assembly includes two movable plates that are slidably mounted on the processing table. Both movable plates are equipped with a buffer mechanism to prevent excessive clamping force from damaging the lithium battery when clamping and fixing it. The buffer mechanism includes a clamping plate that is slidably mounted on the movable plates from left to right. A lifting mechanism is installed between the movable plates and the clamping plate. The lifting mechanism is used to move the lithium battery upward between the two movable plates when the buffer mechanism is running. The lifting mechanism includes a lifting plate that is slidably mounted on the movable plates from top to bottom.

[0009] A pressing assembly is used to apply a stable pressing effect to the lithium battery as a whole during the coating process, the pressing assembly including a pressure roller that is slidably mounted on the processing table.

[0010] Furthermore, a servo motor is fixedly installed on the side wall of the processing table, a moving groove is opened on the processing table, and two moving blocks are slidably installed in the moving groove. The two moving blocks are respectively fixedly connected to the corresponding moving plates. A bidirectional lead screw is fixedly connected to the output end of the servo motor, and the bidirectional lead screw and the two moving blocks are threaded.

[0011] Furthermore, a I-beam frame is fixedly installed on the processing table via multiple support rods, and an installation beam is fixedly installed on the I-beam frame. Two guide grooves are opened on the installation beam, and guide blocks are slidably installed in both guide grooves. A fixing sleeve is fixedly installed on each of the two guide blocks via the installation block. A rotating rod is rotatably installed on each of the two fixing sleeves, and the two rotating rods are respectively fixedly installed at both ends of the pressure roller. A compression spring is installed between each of the two guide blocks and the corresponding guide groove.

[0012] Furthermore, a connecting plate is rotatably connected to one end of the clamping plate near the lifting plate, and two springs are installed between the connecting plate and the lifting plate. A crossbar is fixedly installed on the side wall of the connecting plate, and the crossbar is slidably connected to the lifting plate. A through groove that cooperates with the crossbar is opened on the moving plate, and an installation plate is fixedly installed at one end of the crossbar that passes through the through groove.

[0013] Furthermore, a rotating ring is fixedly installed on the connecting plate, and an annular groove that mates with the rotating ring is opened on the clamping plate, with a bearing installed between the annular groove and the rotating ring.

[0014] Furthermore, the movable plate is provided with a lifting groove that cooperates with the lifting plate, the side wall of the lifting groove is provided with a sliding groove, the side wall of the lifting plate is provided with a fixing block that slides with the sliding groove, and a lead screw is rotatably installed inside the movable plate, with one end of the lead screw located in the sliding groove being threadedly connected to the fixing block.

[0015] Furthermore, a fixed gear is fixedly installed at the bottom of the lead screw, and a fixed rack that meshes with the fixed gear is fixedly installed on the side wall of the crossbar.

[0016] Furthermore, each of the two clamping discs is fixedly mounted with a drive rod, and each of the two crossbars and the corresponding mounting plate is provided with a through hole that rotatably engages with the corresponding drive rod. A rotating motor is fixedly mounted on one of the mounting plates, and the output end of the rotating motor is fixedly connected to the corresponding drive rod.

[0017] Compared with existing technologies, the advantages of this invention are:

[0018] 1. By combining the buffer mechanism and the lifting mechanism, rigid damage can be avoided when clamping and fixing the lithium battery. At the same time, the bottom of the lithium battery is automatically separated from the processing table as the clamping force increases. This avoids the bottom or side edges of the battery from rigidly contacting or rubbing against the surface of the processing table during subsequent rotation, which may affect the coating effect or even cause scratches on the battery cell casing. After coating is completed, the lithium battery can be lowered onto the processing table first by reducing the clamping force before separation, which may prevent the lithium battery from falling and colliding with the surface of the processing table and causing damage.

[0019] 2: Through the cooperation of guide blocks, guide grooves and pressure springs, the vertical position of the pressure roller can be automatically changed according to the contact height between the lithium battery and the pressure roller, ensuring the normal rotation of the lithium battery and the effective pressing effect of the pressure roller on the blue film during the coating process, thus ensuring the smooth progress of the coating operation and the coating effect.

[0020] In summary, this invention can automatically adjust the height of the lithium battery relative to the processing table by utilizing changes in clamping force during the coating process. This avoids the problem of rigid contact between the battery and the processing table during subsequent rotation coating, which could affect the coating effect or even cause scratches on the battery cell casing. It also ensures that the coated lithium battery rests stably on the processing table, and the pressing pressure on the blue film remains stable during the coating process, thus ensuring the smooth progress of the coating operation and the coating effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a coating device for battery production proposed in this invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure after removing the lithium battery;

[0023] Figure 3 for Figure 1 Structural diagram of the intermediate machining table and I-frame;

[0024] Figure 4 for Figure 2 A schematic diagram of the structure after removing the processing table and the I-frame;

[0025] Figure 5 for Figure 4 A structural diagram of one of the movable plates;

[0026] Figure 6 for Figure 5 Top view;

[0027] Figure 7 for Figure 6 Schematic diagram of the structure of surface AA;

[0028] Figure 8 for Figure 5 A structural decomposition diagram;

[0029] Figure 9 for Figure 8 A structural diagram from another perspective;

[0030] Figure 10 for Figure 4 Enlarged schematic diagram of the structure at the intermediate pressure roller.

[0031] In the diagram: 1. Processing table, 2. Lithium battery, 3. Moving plate, 4. Lifting plate, 5. Clamping plate, 6. Lifting groove, 7. Connecting plate, 8. Spring, 9. Crossbar, 10. Mounting plate, 11. Through groove, 12. Rotating motor, 13. Drive rod, 14. Through hole, 15. Rotating ring, 16. Annular groove, 17. Fixed block, 18. Sliding groove, 19. Lead screw, 20. Fixed gear, 21. Fixed rack, 22. Moving block, 23. Moving groove, 24. Servo motor, 25. Bidirectional lead screw, 26. Support rod, 27. I-beam frame, 28. Mounting beam, 29. Pressure roller, 30. Guide groove, 31. Guide block, 32. Mounting block, 33. Fixed sleeve, 34. Rotating rod, 35. Compression spring. Detailed Implementation

[0032] Reference Figure 1 A coating device for battery production includes a processing table 1 and a lithium battery 2. The processing table 1 is an existing worktable for coating lithium battery 2. It is equipped with a support component for placing the insulating film and a component for adjusting the tension of the insulating film. The support component and the tension adjustment component can both adopt existing technology. Their specific structure and working principle will not be described here. The insulating film used can be a common blue film.

[0033] During the coating process, in order to suppress coating wrinkles and bubbles, the blue film can be preheated to a temperature of 45-60℃ to relax the molecular chains of the film and eliminate the internal stress generated during storage. At the same time, an ion wind static eliminator is used to remove static electricity and dust from the surface of the film. The static voltage is controlled within ±50V. The ion wind static eliminator is also an existing product, and its working principle and specific structure will not be described here.

[0034] Then, the lithium battery 2 to be processed is fixed and its surface is heated to stabilize the temperature at 30-35℃, thereby reducing the temperature difference between it and the blue film.

[0035] The tension of the blue film is then adjusted using a tension-adjusting component, followed by the coating process. After coating, clean air at 25-28°C is blown onto the surface of the coated cell through a cooling nozzle for 5-8 seconds, allowing the adhesive layer between the film and the cell to solidify quickly and preventing the film from shrinking and wrinkling during the cooling process. The cooling air can be blown by a common fan or other products commonly used in the coating process. The specific structure and working principle are not described here.

[0036] Reference Figures 1-10 A coating device for battery production also includes a clamping assembly for clamping and fixing a lithium battery 2 placed on a processing table 1. The clamping assembly includes two movable plates 3 slidably mounted on the processing table 1. A servo motor 24 is fixedly mounted on the side wall of the processing table 1. A movable groove 23 is provided on the processing table 1, and two movable blocks 22 are slidably mounted in the movable groove 23. The two movable blocks 22 are respectively fixedly connected to the corresponding movable plates 3. A bidirectional lead screw 25 is fixedly connected to the output end of the servo motor 24, and the bidirectional lead screw 25 and the two movable blocks 22 are threadedly connected.

[0037] When the servo motor 24 is working, it can rotate in the forward or reverse direction, thereby driving the bidirectional lead screw 25 to rotate in the forward or reverse direction. When the servo motor 24 drives the bidirectional lead screw 25 to rotate in the forward direction, the two moving blocks 22 drive the two moving plates 3 to move closer to each other, which can fix the lithium battery 2 placed in the center of the processing table 1. After the processing is completed, the servo motor 24 is rotated in the reverse direction, which drives the two bidirectional lead screws 25 to rotate in the reverse direction at the same time. This will cause the two moving blocks 22 to move the two moving plates 3 away from each other, releasing the fixation of the lithium battery 2. The servo motor 24 can be a servo motor of model 130ST-M05025LFB.

[0038] Both movable plates 3 are equipped with buffer mechanisms. The buffer mechanisms are used to prevent excessive clamping force from damaging the lithium battery 2 when clamping and fixing it. The buffer mechanisms include clamping disks 5 that slide left and right on the movable plates 3. As the part that directly contacts the lithium battery 2, the side of the clamping disk 5 that is close to the lithium battery 2 is made of elastic protective material (such as polyurethane foam) to protect the lithium battery 2. It also has a diamond grid pattern to improve friction.

[0039] A connecting plate 7 is rotatably connected to one end of the clamping plate 5 near the lifting plate 4. Two springs 8 are installed between the connecting plate 7 and the lifting plate 4. The elasticity of the springs 8 allows the connecting plate 7 to move left and right relative to the lifting plate 4. A crossbar 9 is fixedly installed on the side wall of the connecting plate 7, and the crossbar 9 is slidably connected to the lifting plate 4. A through groove 11 that cooperates with the crossbar 9 is opened on the moving plate 3. An mounting plate 10 is fixedly installed at one end of the crossbar 9 that passes through the through groove 11. The cooperation between the crossbar 9 and the through groove 11 can ensure the connection stability between the connecting plate 7 and the lifting plate 4. The design of the mounting plate 10 can prevent the crossbar 9 from separating from the through groove 11. When the moving plate 3 moves the clamping plate 5 closer to the lithium battery 2 to clamp it, the reaction force on the clamping plate 5 can make the connecting plate 7 overcome the elasticity of the springs 8 and move closer to the lifting plate 4. At the same time, due to the deformation of the springs 8, their elasticity can keep the clamping plate 5 in stable and effective contact with the lithium battery 2, improving the clamping stability.

[0040] A rotating ring 15 is fixedly installed on the connecting plate 7. An annular groove 16 is formed on the clamping plate 5 to mate with the rotating ring 15. A bearing is installed between the annular groove 16 and the rotating ring 15. The mating of the rotating ring 15 and the annular groove 16 ensures the connection between the clamping plate 5 and the connecting plate 7, allowing the clamping plate 5 to rotate on the connecting plate 7. A drive rod 13 is fixedly installed on each of the two clamping plates 5. Through holes 14 are provided on both crossbars 9 and the corresponding mounting plates 10 to rotatably engage with the corresponding drive rod 13. One of the mounting plates 10... A rotary motor 12 is fixedly installed on the 0, and the output end of the rotary motor 12 is fixedly connected to the corresponding drive rod 13. When the rotary motor 12 is working, it can drive the corresponding clamping plate 5 to rotate through the drive rod 13. After the two clamping plates 5 have finished clamping the two ends of the lithium battery 2, the rotation of the rotary motor 12 can drive the lithium battery 2 to rotate between the two moving plates 3 through the two clamping plates 5, so as to facilitate the overall coating process. The rotary motor 12 can be a motor that can only rotate in one direction, which is common in daily life and work.

[0041] A lifting mechanism is installed between the movable plate 3 and the clamping plate 5. The lifting mechanism is used to make the clamping plate 5 move the lithium battery 2 between the two movable plates 3 when the buffer mechanism is running. The lifting mechanism includes a lifting plate 4 that is slidably installed on the movable plate 3. The movable plate 3 is provided with a lifting groove 6 that cooperates with the lifting plate 4. The design of the lifting groove 6 allows the lifting plate 4 to move up and down on the movable plate 3. At the same time, its covering effect on the lifting plate 4 can also ensure the stability of the lifting plate 4 when it moves.

[0042] A sliding groove 18 is provided on the side wall of the lifting groove 6, and a fixed block 17 that slides and engages with the sliding groove 18 is provided on the side wall of the lifting plate 4. A lead screw 19 is rotatably installed inside the moving plate 3, and one end of the lead screw 19 located in the sliding groove 18 is threadedly connected to the fixed block 17. When the lead screw 19 rotates, it can drive the lifting plate 4 to move up and down inside the moving plate 3 through the fixed block 17, thereby adjusting and controlling the distance between the bottom of the lithium battery 2 and the processing table 1. A fixed gear 20 is fixedly installed at the bottom of the lead screw 19, and a fixed rack that meshes with the fixed gear 20 is fixedly installed on the side wall of the crossbar 9. 21. Under the cooperative effect of the fixed rack 21 and the fixed gear 20, when the two clamping disks 5 approach each other to clamp and fix the lithium battery 2, the movement of the clamping disk 5 relative to the lifting plate 4 during the continuous clamping of the lithium battery 2 can drive the lead screw 19 to rotate at the same time. At this time, the lifting plate 4 will automatically move upward in the moving plate 3, so that the bottom of the lithium battery 2 can be automatically separated from the processing table 1 during the clamping process, avoiding the problem that the bottom or side edge of the battery 2 will have rigid contact or friction with the surface of the processing table 1 during subsequent rotation, affecting the coating effect or even causing scratches on the battery cell casing.

[0043] After the coating process is completed, the two clamping plates 5 are separated to release the lithium battery 2. In the initial stage, the separation of the two moving plates 3 releases the elastic force of the spring 8. At this time, the clamping plate 5 moves away from the lifting plate 4. The rotation of the lead screw 19 allows the lifting plate 4 to move down so that the bottom of the lithium battery 2 contacts the processing table 1. After the clamping plate 5 separates from the lithium battery 2, the problem of the lithium battery 2 falling and colliding with the surface of the processing table 1 and being damaged can be avoided.

[0044] The pressing assembly is used to apply a stable pressing effect to the lithium battery 2 as it rotates during the coating process. The pressing assembly includes a pressure roller 29 that slides up and down on the processing table 1. A template 27 is fixedly installed on the processing table 1 by multiple support rods 26, and an installation beam 28 is fixedly installed on the template 27. The gap between the multiple support rods 26 is larger than the size of the lithium battery 2, which facilitates the loading and unloading of the lithium battery 2 on the processing table 1.

[0045] Two guide grooves 30 are provided on the mounting beam 28, and guide blocks 31 are slidably installed in both guide grooves 30. Fixing sleeves 33 are fixedly installed on both guide blocks 31 through mounting blocks 32. Rotating rods 34 are rotatably installed on both fixing sleeves 33, and the two rotating rods 34 are respectively fixedly installed at both ends of the pressure roller 29. During the film coating process, the cooperation between the guide blocks 31 and the guide grooves 30 allows the pressure roller 29 to move up and down at the bottom of the mounting beam 28. Thus, when the lithium battery 2 rotates, the position of the pressure roller 29 is automatically changed according to the contact height between the lithium battery 2 and the pressure roller 29, ensuring the normal rotation of the lithium battery 2 and the effective pressing effect of the pressure roller 29 on the blue film during the film coating process.

[0046] A compression spring 35 is installed between each of the two guide blocks 31 and the corresponding guide groove 30. The elasticity of the compression spring 35 can effectively ensure the pressing effect of the pressure roller 29 on the blue film during the coating process, and avoid the problem of the pressure roller 29 shaking or not making proper contact with the blue film, thus ensuring the coating effect.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A coating apparatus for battery production, comprising a processing table (1) and a lithium battery (2), characterized in that, Also includes: A clamping assembly is used to clamp and fix a lithium battery (2) placed on a processing table (1). The clamping assembly includes two movable plates (3) that are slidably mounted on the processing table (1). Both movable plates (3) are equipped with a buffer mechanism. The buffer mechanism is used to prevent excessive clamping force from damaging the lithium battery (2) when clamping and fixing it. The buffer mechanism includes a clamping plate (5) that is slidably mounted on the movable plate (3). A lifting mechanism is installed between the movable plate (3) and the clamping plate (5). The lifting mechanism is used to make the clamping plate (5) move the lithium battery (2) upward between the two movable plates (3) when the buffer mechanism is running. The lifting mechanism includes a lifting plate (4) that is slidably mounted on the movable plate (3). A pressing assembly is used to apply a stable pressing effect to the lithium battery (2) as a whole during the coating process, the pressing assembly including a pressure roller (29) that is slidably mounted on the processing table (1). A I-frame (27) is fixedly installed on the processing table (1) by multiple support rods (26), and an installation beam (28) is fixedly installed on the I-frame (27). Two guide grooves (30) are opened on the installation beam (28), and guide blocks (31) are slidably installed in the two guide grooves (30). Fixing sleeves (33) are fixedly installed on the two guide blocks (31) by mounting blocks (32). Rotating rods (34) are rotatably installed on the two fixing sleeves (33), and the two rotating rods (34) are respectively fixedly installed at both ends of the pressure roller (29). Compression springs (35) are installed between the two guide blocks (31) and the corresponding guide grooves (30). The clamping plate (5) is rotatably connected to a connecting plate (7) at one end near the lifting plate (4), and two springs (8) are installed between the connecting plate (7) and the lifting plate (4). A crossbar (9) is fixedly installed on the side wall of the connecting plate (7), and the crossbar (9) is slidably connected to the lifting plate (4). A through groove (11) that cooperates with the crossbar (9) is opened on the moving plate (3), and an mounting plate (10) is fixedly installed at one end of the crossbar (9) that passes through the through groove (11). The movable plate (3) is provided with a lifting groove (6) that cooperates with the lifting plate (4). The side wall of the lifting groove (6) is provided with a sliding groove (18). The side wall of the lifting plate (4) is provided with a fixing block (17) that slides and cooperates with the sliding groove (18). A lead screw (19) is rotatably installed in the movable plate (3), and one end of the lead screw (19) located in the sliding groove (18) is threadedly connected to the fixing block (17). A fixed gear (20) is fixedly installed at the bottom of the lead screw (19). A fixed rack (21) that meshes with the fixed gear (20) is fixedly installed on the side wall of the crossbar (9).

2. The coating apparatus for battery production according to claim 1, characterized in that, A servo motor (24) is fixedly installed on the side wall of the processing table (1). A moving slot (23) is provided on the processing table (1), and two moving blocks (22) are slidably installed in the moving slot (23). The two moving blocks (22) are respectively fixedly connected to the corresponding moving plate (3). A bidirectional lead screw (25) is fixedly connected to the output end of the servo motor (24), and the bidirectional lead screw (25) and the two moving blocks (22) are threaded.

3. The coating apparatus for battery production according to claim 1, characterized in that, A rotating ring (15) is fixedly installed on the connecting plate (7), and an annular groove (16) that cooperates with the rotating ring (15) is opened on the clamping plate (5), and a bearing is installed between the annular groove (16) and the rotating ring (15).

4. A coating apparatus for battery production according to claim 1, characterized in that, Both clamping discs (5) are fixedly mounted with drive rods (13), and both crossbars (9) and the corresponding mounting plates (10) are provided with through holes (14) that rotatably cooperate with the corresponding drive rods (13). One of the mounting plates (10) is fixedly mounted with a rotating motor (12), and the output end of the rotating motor (12) is fixedly connected to the corresponding drive rod (13).

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