Square lithium battery blue film cutting device

Abstract

The utility model relates to the technical field of lithium battery production, and particularly discloses a square lithium battery blue film cutting device which comprises a cutting table. The adjusting tables are symmetrically arranged on the cutting table; the two sides of the adjusting table are connected with the cutting assembly through telescopic pieces, the cutting assembly comprises a triangular pressing plate, and a wedge-shaped knife edge is formed in the bevel edge of the triangular pressing plate. According to the utility model, the triangular pressing plate and the corresponding wedge-shaped knife edge are arranged, and the wedge-shaped knife edge on the inclined surface can be in contact with the two right-angle sides of the triangular folded angle, so that the overlapped part of the blue film can be conveniently cut off, the condition that the top cover patch of the lithium battery is warped due to the overlapped folded angles of the blue film is effectively avoided, the whole top cover patch is prevented from falling off, and the service life of the top cover patch is prolonged. The insulation failure of the battery is caused, and safety accidents are extremely easy to occur.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production, and particularly relates to a square lithium battery blue film cutting device. Background Art

[0002] With the development of science and technology, new energy batteries are more and more widely used. Common batteries include square and cylindrical ones. During the production and processing of square batteries, a blue film is coated on the surface to insulate and protect the battery housing. However, due to uneven devices such as positive and negative electrode posts and explosion-proof valves on the top of the square battery, the blue film cannot completely fit the top cover, so a special top cover patch is used on the top cover.

[0003] However, for complete insulation, the width of the blue film is generally greater than the height of the square battery. Therefore, the blue film needs to be folded at the corners of the top cover of the battery, resulting in four folded corners. Generally, when the blue film wrapping machine wraps the blue film, it folds the short sides first and then the long sides. After folding the short sides, the top blue film will roughly form a non-regular octagon. At this time, when folding the long sides, there will be a situation of blue film overlap at the position of the included angle, resulting in steps and double folds. A part of the long side of the blue film will be blocked by the short side, so there will be a certain gap between the junction of the long side and the short side of the blue film and the top cover patch. This leads to incomplete fitting between this part of the top cover patch and the top cover (as shown in Figure 4 ), if the folded corners of the wrapped blue film are not cut off in time, after long-term placement or external temperature fluctuations, due to dust accumulation and temperature changes, the folded corners of the blue film will slowly warp and pull the already fitted blue film, resulting in an enlarged gap at the overlapping part of the folded corners of the blue film, and slowly causing the position corresponding to the folded corner of the long side of the blue film to warp, thus causing the corners of the top cover patch to warp and even the entire top cover patch to fall off, resulting in insulation failure of the battery and extremely prone to safety accidents. Content of the Utility Model

[0004] Aiming at the problem that after the blue film is coated on the outer surface of the lithium battery in the prior art, the blue film at the four corners of the top cover patch will produce folded corners, and if the folded corners are not cut off in time, it will cause the corners of the top cover patch to be prone to warping, the utility model proposes the following technical solutions:

[0005] A square lithium battery blue film cutting device, comprising:

[0006] A cutting table;

[0007] An adjusting table, the adjusting tables are symmetrically arranged on the cutting table;

[0008] A cutting assembly, the two sides of the adjusting table are connected with the cutting assembly through telescopic members, the cutting assembly includes a triangular pressing plate, and a wedge-shaped cutting edge is arranged on the hypotenuse of the triangular pressing plate.

[0009] As an optimization of the above technical solution, the cutting assembly further includes a limiting plate, which is fixedly connected to the triangular pressing plate. There is a triangular notch between the limiting plate and the triangular pressing plate, and the triangular notch is similar to the triangular fold at the overlapping part of the blue film.

[0010] As an optimization of the above technical solution, the hypotenuse length of the triangular pressing plate is much greater than the hypotenuse length of the triangular fold at the overlapping part of the blue film.

[0011] As an optimization of the above technical solution, a movable groove is provided on one side of the adjusting table corresponding to the cutting assembly. A screw rod is rotatably installed in the movable groove, and the end of the telescopic member is threadedly connected to the screw rod by a thread ring.

[0012] As an optimization of the above technical solution, support blocks are fixed on the triangular pressing plate and the limiting plate, and the other side of the support blocks is attached to the cutting table.

[0013] As an optimization of the above technical solution, battery pressing plates are symmetrically arranged on the cutting table.

[0014] As an optimization of the above technical solution, the battery pressing plates are flush with the adjusting table, and both the battery pressing plates and the adjusting table are provided with protective pads. When the protective pads contact the top of the lithium battery, the triangular pressing plate and the limiting plate on the cutting assembly also contact the top of the lithium battery.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. The present utility model is provided with a triangular pressing plate and a corresponding wedge-shaped cutting edge. The wedge-shaped cutting edge on the inclined surface can contact the two right-angled sides of the triangular fold, so as to conveniently cut off the overlapping part of the blue film at the patch of the lithium battery top cover, effectively avoiding the situation that the patch of the lithium battery top cover warps due to the overlapping of the blue film fold, preventing the entire top cover patch from falling off, not easily causing the insulation failure of the battery, and not easily occurring safety accidents;

[0017] 2. The present utility model is provided with a limiting plate. By pressing the limiting plate at the junction of the long side and the short side of the blue film, during the cutting process of the cutting assembly, the limiting plate always presses at the junction of the long side and the short side of the blue film, effectively avoiding excessive cutting of the long side of the blue film during cutting, resulting in a reduction in the bonding area between the blue film and the top cover patch, not easily causing the top cover patch to warp, and effectively preventing the top cover patch from falling off. Description of the Drawings

[0018] Figure 1 is the overall structural schematic diagram of the present utility model;

[0019] Figure 2 is the structural schematic diagram of the cutting assembly;

[0020] Figure 3 is the connection structural schematic diagram of the cutting assembly and the adjusting table;

[0021] Figure 4 It is a schematic diagram of the structure of a lithium battery after film wrapping in the prior art.

[0022] In the figure:

[0023] 1. Cutting table; 2. Battery pressing plate; 3. Adjusting table; 31. Movable groove; 4. Cutting assembly; 41. Triangular pressing plate; 42. Limiting plate; 43. Wedge-shaped cutting edge; 44. Support block; 5. Telescopic member; 6. Screw; 7. Protective pad. Specific embodiments

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Embodiment

[0025] As Figures 1-3 shown, a square lithium battery blue film cutting device includes a cutting table 1. Adjusting tables 3 are symmetrically arranged on the cutting table 1. A cutting assembly 4 is connected to both sides of the adjusting table 3 through a telescopic member 5. Among them, the telescopic member 5 can be a cylinder. The cutting assembly 4 includes a triangular pressing plate 41. A wedge-shaped cutting edge 43 is provided on the hypotenuse of the triangular pressing plate 41. The wedge-shaped cutting edge 43 is used to cut the triangular fold at the overlapping part of the blue film, so that the wedge-shaped cutting edge 43 can cut the two right-angled sides of the triangular fold at the same time, thereby facilitating the cutting off of the overlapping part of the blue film and effectively avoiding the situation that the top cover patch of the lithium battery warps due to the overlapping of the blue film folds.

[0026] During specific operation: when the top cover patch of the lithium battery is covered with film and triangular folds are formed at the four corners, the hypotenuse of the triangular pressing plate 41 is parallel to the hypotenuse of the triangular fold, and then the triangular pressing plate 41 is moved outwards, so that the wedge-shaped cutting edge 43 on the triangular pressing plate 41 enters the position between the overlapping triangular folds. At this time, the innermost side of the wedge-shaped cutting edge 43 contacts the junction of the long side and the short side of the blue film, and the long side of the blue film also contacts the wedge-shaped cutting edge 43, so that when the wedge-shaped cutting edge 43 moves outwards, it can cut the two right-angled sides of the triangular fold at the same time.

[0027] Furthermore, the cutting assembly 4 further includes a limiting plate 42. The limiting plate 42 is fixedly connected to the triangular pressing plate 41. The limiting plate 42 is used to press the junction of the long side and the short side of the blue film to avoid excessive cutting of the long side during cutting, resulting in a reduction in the bonding area between the blue film and the top cover patch, which is likely to cause the top cover patch to warp. In addition, there is a triangular notch between the limiting plate 42 and the triangular pressing plate 41. The triangular notch is similar to the triangular fold at the overlapping part of the blue film, so that it does not affect the cutting of the triangular fold by the wedge-shaped cutting edge 43 on the triangular pressing plate 41.

[0028] Further, the hypotenuse length of the triangular pressing plate 41 is much greater than the hypotenuse length of the triangular fold angle at the blue film overlapping portion, so as to ensure that the wedge-shaped cutting edge 43 can cut both right-angled sides of the triangular fold angle simultaneously.

[0029] Further, an activity slot 31 is provided on one side of the adjustment table 3 corresponding to the cutting assembly 4. A screw rod 6 is rotatably installed in the activity slot 31. The end of the telescopic member 5 is threadedly connected to the screw rod 6 by a thread ring. By rotating the screw rod 6, the position of the telescopic member 5 is moved, so as to adjust the position of the limiting plate 42, making the limiting plate 42 just press on the junction of the long side and the short side of the blue film.

[0030] Further, support blocks 44 are fixed on the triangular pressing plate 41 and the limiting plate 42. The other side of the support block 44 is in contact with the cutting table 1. During the movement of the triangular pressing plate 41, it is supported by the support block 44, improving the stability of the triangular pressing plate 41 and ensuring that the wedge-shaped cutting edge 43 can smoothly enter the middle position of the overlapping triangular fold angle.

[0031] Further, battery pressing plates 2 are symmetrically arranged on the cutting table 1. The battery pressing plates 2 are used to press on the top cover patch and at the same time press the blue film to prevent the blue film from warping during the cutting of the triangular fold angle.

[0032] Further, the battery pressing plates 2 and the adjustment table 3 are flush, and both the battery pressing plates 2 and the adjustment table 3 are provided with protective pads 7. The protective pads 7 can be made of rubber material to protect the top cover patch and the blue film. When the protective pads 7 contact the top of the lithium battery, the triangular pressing plate 41 and the limiting plate 42 on the cutting assembly 4 also contact the top of the lithium battery at the same time, making the triangular pressing plate 41 able to fit on the blue film, thus facilitating the cutting of the blue film.

[0033] Working principle: After the lithium battery top cover patch is covered with the film and triangular fold angles are formed at the four corners, first place the cutting table 1 on the top of the lithium battery and keep it in a coincident state. At the same time, make the battery pressing plates 2 and the adjustment table 3 respectively fit on the long side and the short side of the blue film. At this time, rotate the screw rods 6 in four directions to move the corresponding telescopic members 5, making the limiting plate 42 just press on the junction of the long side and the short side of the blue film, that is, one of the right-angled sides of the triangular fold angle. Then start the telescopic member 5 to extend outwards, making the wedge-shaped cutting edge 43 on the triangular pressing plate 41 slowly enter the middle position of the overlapping triangular fold angle. The innermost side of the wedge-shaped cutting edge 43 first contacts the junction of the long side and the short side of the blue film, and then the other right-angled side of the triangular fold angle contacts the wedge-shaped cutting edge 43. The wedge-shaped cutting edge 43 cuts the triangular fold angle during the outward movement.

[0034] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed.

Claims

1. A square lithium battery blue film cutting device, characterized in that: include: Cutting table (1); An adjustment table (3), wherein the adjustment table (3) is symmetrically arranged on the cutting table (1); A cutting assembly (4), wherein the two sides of the adjustment platform (3) are connected to the cutting assembly (4) via telescopic parts (5), and the cutting assembly (4) comprises a triangular pressing plate (41), and a wedge-shaped cutting edge (43) is provided on the oblique side of the triangular pressing plate (41).

2. The square lithium battery blue film cutting device according to claim 1 is characterized in that: The cutting assembly (4) further comprises a limiting plate (42), wherein the limiting plate (42) is fixedly connected to the triangular pressing plate (41), and a triangular notch is provided between the limiting plate (42) and the triangular pressing plate (41), wherein the triangular notch is similar to the triangular folding angle at the overlapping portion of the blue film.

3. The square lithium battery blue film cutting device according to claim 2 is characterized in that: The length of the hypotenuse of the triangular pressing plate (41) is much greater than the length of the hypotenuse of the triangular folded corner where the blue film overlaps.

4. The square lithium battery blue film cutting device according to claim 3 is characterized in that: A movable groove (31) is provided on one side of the adjustment platform (3) corresponding to the cutting assembly (4), a screw rod (6) is rotatably mounted in the movable groove (31), and the end of the telescopic member (5) is threadedly connected to the screw rod (6) by means of a threaded ring.

5. The square lithium battery blue film cutting device according to claim 4 is characterized in that: A support block (44) is fixed on the triangular pressure plate (41) and the limiting plate (42), and the other surface of the support block (44) is in contact with the cutting table (1).

6. The square lithium battery blue film cutting device according to claim 5, characterized in that: The cutting table (1) is symmetrically provided with battery pressing plates (2).

7. The square lithium battery blue film cutting device according to claim 6, characterized in that: The battery pressing plate (2) and the adjusting platform (3) are flush with each other, and both the battery pressing plate (2) and the adjusting platform (3) are provided with a protective pad (7). When the protective pad (7) contacts the top of the lithium battery, the triangular pressing plate (41) and the limiting plate (42) on the cutting assembly (4) also contact the top of the lithium battery.

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