Inflation compression roller of square lithium battery coating machine with variable air pressure

Abstract

The utility model belongs to the technical field of lithium ion battery manufacturing, and particularly relates to a variable-air-pressure square lithium battery coating machine inflation compression roller which comprises an air swelling shaft, an air bag shaft sleeve is arranged outside the air swelling shaft, air swelling tiles are arranged on the outer surface of the air swelling shaft, rhombic strips are fixedly installed on the outer surfaces of the air swelling tiles, and the rhombic strips are connected with the air bag shaft sleeve. And strip-shaped arc-shaped grooves are formed in the outer surfaces of the inflatable tiles. The film air bag roller is adopted as a rolling device to press the blue film on the battery shell, a CPP (casting polypropylene) film air bag roller sleeve has enough deformation space, the surface of the battery can be always compacted along with fluctuation of the surface of the battery when the battery shell is rolled, and the blue film presses the surface of the battery to extrude air from bottom to top; bubbles and wrinkles are avoided when the blue film is coated.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery manufacturing technology, specifically relating to a variable pressure square lithium battery coating machine inflation roller. Background Technology

[0002] After the square lithium batteries are manufactured, they need to be coated with an insulating blue film. Currently, in the lithium battery industry, manual coating machines are typically used on non-mass production pilot lines, while automated coating machines are used on automated mass production lines. During the coating process, an ionizer first removes static electricity from the blue film. After the blue film is pulled out by the film-pulling mechanism (film-pulling rod), the blue film is parallel to the battery casing. At this point, a lower roller pushes the parallel blue film towards the battery casing to expel air and smooth it out, thus ensuring the blue film adheres smoothly to the battery casing.

[0003] Currently, most coating machines on the market use sponge rollers for coating: the roller surface is covered with a sponge layer, and both ends are connected to solid shaft heads. During the coating process, the roller mainly relies on pressing against the battery casing to adhere the blue film to the battery. When the battery casing is concave or bulging, traditional rollers cannot adapt to the uneven interface: due to the limited deformation range and uneven deformation of the rubber layer, the roller usually cannot perfectly adhere to the battery casing during the coating process, resulting in air bubbles left on the large surface, sides, and bottom of the blue film between the blue film and the battery, affecting the battery's heat dissipation performance and appearance. Utility Model Content

[0004] The purpose of this invention is to provide a variable pressure square lithium battery coating machine inflation roller to solve the problems existing in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a variable air pressure square lithium battery coating machine inflation roller, including an air expansion shaft, an air bladder bushing is provided on the outside of the air expansion shaft, an air expansion tile is provided on the outer surface of the air expansion shaft, a diamond strip is fixedly installed on the outer surface of the air expansion tile, and a strip-shaped arc groove is formed on the outer surface of the air expansion tile.

[0006] Preferably, a cover body is fixedly installed on the outer surface of the air-expanding tile, and a shaft head is fixedly installed on the outer surface of the air-expanding shaft.

[0007] Preferably, an installation sleeve is fixedly installed on the outer surface of the air shaft, a first spring is fixedly installed inside the installation sleeve, a piston plate is fixedly installed on the outer surface of the first spring, an extension rod is fixedly installed inside the piston plate, a support plate is fixedly installed on the outer surface of the extension rod, a fixed extrusion ring is fixedly installed on the outer surface of the extension rod, an air inlet is provided inside the installation sleeve, a second spring is fixedly installed inside the installation sleeve, an auxiliary rod is fixedly installed inside the installation sleeve, a movable plate is slidably connected to the outer surface of the auxiliary rod, and an extrusion block is fixedly installed on the outer surface of the movable plate.

[0008] Preferably, the number of air-expanding tiles is three, and each air-expanding tile has a number of diamond-shaped strips fixedly installed on its outer surface, and each air-expanding tile has a number of strip-shaped arc grooves on its outer surface.

[0009] Preferably, there are two sealing bodies, which are located on the left and right sides of the three air-expanding tiles respectively. Each sealing body is composed of a first semi-circular sealing cover and a second semi-circular sealing cover. There are two shaft heads, which are located on the left and right sides of the air-expanding shaft respectively.

[0010] Preferably, there are six mounting sleeves, which are located at the top and bottom of the air shaft, respectively. A first spring is fixedly installed inside each mounting sleeve. The six first springs are located on the inner top wall and inner bottom wall of the six mounting sleeves, respectively. A piston plate is fixedly installed on the opposite side of each of the six first springs. The outer surface of the piston plate is movably connected to the inside of the mounting sleeve. An extension rod is fixedly installed inside each piston plate.

[0011] Preferably, a support plate is fixedly installed on the side of each extension rod away from the mounting sleeve, and the side of each support plate away from the mounting sleeve is fixedly connected to the inside of the airbag bushing. The inside of each first spring is respectively sleeved with the outer surface of each extension rod, and two air inlets are opened inside each mounting sleeve.

[0012] Preferably, each of the mounting sleeves has two second springs fixedly installed inside, and each of the mounting sleeves has four auxiliary rods fixedly installed inside. The outer surfaces of the four auxiliary rods are slidably connected to two movable plates. The opposite sides of the two second springs are fixedly connected to the opposite sides of the two movable plates. The opposite sides of the two movable plates are fixedly installed with extrusion blocks, and the outer surface of the extrusion blocks is movably connected to the outer surface of the fixed extrusion ring.

[0013] Preferably, the inner wall of the airbag bushing is provided with an anti-slip layer.

[0014] Preferably, the airbag bushing is made of cast polypropylene.

[0015] The beneficial effects of this utility model are as follows: Compared with the prior art, the variable air pressure square lithium battery coating machine's inflatable roller, because the material of the airbag bushing has sufficient deformation space, can always compact the battery surface with the undulations of the battery surface when rolling the battery casing. The blue film covering the battery surface squeezes out air from bottom to top, avoiding air bubbles and wrinkles when coating the blue film. When a battery with excessive surface depression needs coating, the air pressure inside the inflatable bushing in contact with the battery can be increased by adjusting the dimension of the central air expansion shaft. At the same time, the piston plate drives the extension rod and support plate to extend outward, and the first spring is... The process involves extrusion, followed by compression of the extrusion block by a fixed extrusion ring during the movement of the extension rod. The extrusion block then moves the moving plate and compresses the second spring. After the extension rod drives the fixed extrusion ring through the extrusion block, the extrusion block is pushed out again by the second spring. The fixed extrusion ring then limits and fixes the extension rod, thereby fixing the support plate and assisting in fixing and supporting the airbag bushing. This provides greater pressure when dealing with surface-concave batteries, allowing for greater pressure and deformation to squeeze out air and flatten the blue film, thus facilitating the coating process for square lithium batteries. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partial three-dimensional structural diagram of the air shaft of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the airbag bushing of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the air-expanding tile of this utility model;

[0020] Figure 5 This is a partial structural diagram of the mounting sleeve of this utility model;

[0021] Figure 6 This is a front sectional view of the present invention.

[0022] Figure 7 This is a front sectional view of the mounting sleeve of this utility model;

[0023] Figure 8 This utility model Figure 7 Enlarged structural diagram at point A in the middle.

[0024] In the diagram: 1. Air shaft; 2. Airbag bushing; 3. Air inflatable tile; 4. Diamond strip; 5. Strip-shaped arc groove; 6. Cover body; 7. Shaft head; 8. Mounting sleeve; 9. First spring; 10. Piston plate; 11. Extension rod; 12. Support plate; 13. Fixed extrusion ring; 14. Air inlet; 15. Second spring; 16. Auxiliary rod; 17. Moving plate; 18. Extrusion block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-8 A variable pressure square lithium battery coating machine inflation roller includes an air-expanding shaft 1, an air-bag bushing 2 externally disposed on the air-expanding shaft 1, air-expanding tiles 3 disposed on the outer surface of the air-expanding shaft 1, diamond-shaped strips 4 fixedly installed on the outer surface of the air-expanding tiles 3, strip-shaped arc grooves 5 formed on the outer surface of the air-expanding tiles 3, a sealing body 6 fixedly installed on the outer surface of the air-expanding shaft 1, a shaft head 7 fixedly installed on the outer surface of the air-expanding shaft 1, and an installation sleeve 8 fixedly installed on the outer surface of the air-expanding shaft 1. A first spring 9 is fixedly installed inside the installation sleeve 8. A piston plate 10 is fixedly installed on the outer surface of a spring 9. An extension rod 11 is fixedly installed inside the piston plate 10. A support plate 12 is fixedly installed on the outer surface of the extension rod 11. A fixed extrusion ring 13 is fixedly installed on the outer surface of the extension rod 11. An air inlet 14 is opened inside the mounting sleeve 8. A second spring 15 is fixedly installed inside the mounting sleeve 8. An auxiliary rod 16 is fixedly installed inside the mounting sleeve 8. A movable plate 17 is slidably connected to the outer surface of the auxiliary rod 16. An extrusion block 18 is fixedly installed on the outer surface of the movable plate 17.

[0027] Specifically, such as Figure 1-3 As shown, the outer sleeve of the air expansion shaft 1 is inflated by an airbag sleeve 2. This thin film airbag forms a flexible rolling mechanism. The flexible rolling mechanism applies force evenly to flatten the blue film on the battery surface, causing the air between the blue film and the battery casing to be squeezed out, ultimately achieving a bubble-free and wrinkle-free coating.

[0028] Specifically, such as Figure 4 As shown, the air expansion tiles 3 are at least three pieces, and a slat-type air expansion shaft 1 can be used. The movement of the air expansion tiles 3 can be controlled by controlling the on and off of compressed air. The torque of the expansion tiles can be adjusted by the inflation pressure. The slat-type air expansion shaft 1 has the advantages of short inflation time, high economic efficiency, large load capacity, simple paper tube placement, detachable shaft, and convenient maintenance.

[0029] Specifically, such as Figure 1 As shown, the first semicircular cover and the second semicircular cover are connected together by bolts. The diameter of the cover body 6 is larger than the inner diameter of the airbag bushing 2, which limits the airbag bushing 2 and prevents the airbag bushing 2 from detaching from the air expansion shaft 1 at both ends.

[0030] When implementing this procedure, please follow these steps:

[0031] 1) First, increase the air pressure inside the inflatable sleeve that is in contact with the battery by adjusting the central air expansion axis by 1 dimension;

[0032] 2) Then the piston plate 10 drives the extension rod 11 and the support plate 12 to extend outward and compress the first spring 9;

[0033] 3) The extrusion block 18 is then squeezed by the fixed extrusion ring 13, and the extrusion block 18 will drive the moving plate 17 to move and be limited.

[0034] 4) Finally, fix the support plate 12 to assist in fixing and supporting the airbag bushing 2, so as to provide greater pressure when dealing with the surface depression of the battery, and squeeze out the air with greater pressure and deformation to flatten the blue film.

[0035] In summary, this variable-pressure square lithium battery coating machine's inflatable roller, because the material of the airbag bushing 2 has sufficient deformation space, can consistently compact the battery surface as it undulates during the rolling process. The blue film covering the battery surface squeezes out air from bottom to top, preventing air bubbles and wrinkles during coating. When a battery with excessive surface depressions needs coating, the air pressure inside the inflatable bushing in contact with the battery can be increased by adjusting the central air expansion shaft 1. Simultaneously, the piston plate 10 drives the extension rod 11 and support plate 12 to extend outwards, compressing the first spring 9. Then, during the movement of the extension rod 11... The extrusion block 18 is squeezed by the fixed extrusion ring 13, which in turn drives the moving plate 17 to move and squeezes the second spring 15. When the extension rod 11 drives the fixed extrusion ring 13 to pass through the extrusion block 18, the extrusion block 18 is pushed out again under the action of the second spring 15. The fixed extrusion ring 13 also limits and fixes the extension rod 11, thereby fixing the support plate 12 and assisting in fixing and supporting the airbag bushing 2. This provides greater pressure when dealing with surface-concave batteries, and squeezes out air and flattens the blue film with greater pressure and deformation, thereby facilitating the coating process of square lithium batteries.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable pressure square lithium battery coating machine inflation roller, characterized in that: It includes an air shaft (1), an air bladder bushing (2) is provided on the outside of the air shaft (1), an air expansion tile (3) is provided on the outer surface of the air shaft (1), a diamond strip (4) is fixedly installed on the outer surface of the air expansion tile (3), and a strip-shaped arc groove (5) is opened on the outer surface of the air expansion tile (3).

2. The variable air pressure square lithium battery coating machine inflation roller according to claim 1, characterized in that: The outer surface of the air-expanding tile (3) is fixedly installed with a cover body (6), and the outer surface of the air-expanding shaft (1) is fixedly installed with a shaft head (7).

3. The variable air pressure square lithium battery coating machine inflation roller according to claim 2, characterized in that: An installation sleeve (8) is fixedly installed on the outer surface of the air shaft (1). A first spring (9) is fixedly installed inside the installation sleeve (8). A piston plate (10) is fixedly installed on the outer surface of the first spring (9). An extension rod (11) is fixedly installed inside the piston plate (10). A support plate (12) is fixedly installed on the outer surface of the extension rod (11). A fixed extrusion ring (13) is fixedly installed on the outer surface of the extension rod (11). An air inlet (14) is opened inside the installation sleeve (8). A second spring (15) is fixedly installed inside the installation sleeve (8). An auxiliary rod (16) is fixedly installed inside the installation sleeve (8). A moving plate (17) is slidably connected to the outer surface of the auxiliary rod (16). An extrusion block (18) is fixedly installed on the outer surface of the moving plate (17).

4. The variable air pressure square lithium battery coating machine inflation roller according to claim 1, characterized in that: The number of the air-expanding tiles (3) is three. Each air-expanding tile (3) has a number of rhomboid strips (4) fixedly installed on its outer surface, and each air-expanding tile (3) has a number of strip-shaped arc grooves (5) on its outer surface.

5. The variable air pressure square lithium battery coating machine inflation roller according to claim 2, characterized in that: There are two cover bodies (6), and the two cover bodies (6) are located on the left and right sides of the three air expansion tiles (3). Each cover body (6) is composed of a first semi-circular cover and a second semi-circular cover. There are two shaft heads (7), and the two shaft heads (7) are located on the left and right sides of the air expansion shaft (1).

6. The variable air pressure square lithium battery coating machine inflation roller according to claim 3, characterized in that: The number of mounting sleeves (8) is six. The six mounting sleeves (8) are located at the top and bottom of the air shaft (1) respectively. A first spring (9) is fixedly installed inside each mounting sleeve (8). The six first springs (9) are located on the inner top wall and inner bottom wall of the six mounting sleeves (8) respectively. A piston plate (10) is fixedly installed on the opposite side of each of the six first springs (9). The outer surface of the piston plate (10) is movably connected to the inside of the mounting sleeve (8). An extension rod (11) is fixedly installed inside each piston plate (10).

7. The variable air pressure square lithium battery coating machine inflation roller according to claim 6, characterized in that: Each of the extension rods (11) has a support plate (12) fixedly installed on the side away from the mounting sleeve (8). The side of each support plate (12) away from the mounting sleeve (8) is fixedly connected to the inside of the airbag bushing (2). The inside of each first spring (9) is sleeved with the outer surface of each extension rod (11). Each mounting sleeve (8) has two air inlets (14) inside.

8. The variable air pressure square lithium battery coating machine inflation roller according to claim 7, characterized in that: Each of the mounting sleeves (8) has two second springs (15) fixedly installed inside, and each of the mounting sleeves (8) has four auxiliary rods (16) fixedly installed inside. The outer surfaces of the four auxiliary rods (16) are slidably connected to two movable plates (17). The opposite sides of the two second springs (15) are fixedly connected to the opposite sides of the two movable plates (17). The opposite sides of the two movable plates (17) are fixedly installed with extrusion blocks (18). The outer surface of the extrusion blocks (18) is movably connected to the outer surface of the fixed extrusion ring (13).

9. The variable air pressure square lithium battery coating machine inflation roller according to claim 1, characterized in that: The inner wall of the airbag bushing (2) is provided with an anti-slip layer.

10. The variable air pressure square lithium battery coating machine inflation roller according to claim 1, characterized in that: The airbag bushing (2) is made of cast polypropylene.

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