Battery insulation film hot melt fixture

Abstract

The application discloses a battery insulation film piece hot melting clamp, and aims to solve the problem that the existing battery cell clamp can only adapt to single-specification battery cells and cannot meet the production requirements of the battery with the same size and different height of the top cover. The battery insulation film piece hot melting clamp comprises a top cover fixing part and a battery cell fixing part. The top cover fixing part is used for fixing the top cover. The battery cell fixing part comprises a battery cell frame and a lifting plate. The battery cell frame is a frame body with an inner wall surface adapted to the shape of the battery cell. One end of the lifting plate is fixedly connected to the top cover fixing part. The battery cell frame is provided with a sliding groove arranged along the height direction. The other end of the lifting plate is movably connected to the sliding groove. According to the application, the top cover fixing part and the battery cell fixing part are movably connected, the battery cell fixing part can adapt to battery cells with different specifications, and the battery cell frame and the clamp sliding block have better universality, and the structure of the top cover frame and the clamp sliding block ensures that the top cover is horizontal relative to the battery cell.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing, and more specifically, to a battery insulating film hot-melt fixture. Background Technology

[0002] In the manufacturing process of square batteries, before the cells are packaged, an insulating film needs to be attached to the outer surface of the cells to protect them and prevent the cell separator from flipping up and coming into contact with the aluminum casing, which could lead to a short circuit. The insulating film is typically heat-fused to the plastic support of the battery top cover. Mylar is commonly used in this industry as the insulating film.

[0003] Patent document CN213006601 discloses a power battery Mylar retainer welding device, which does not use a cell fixing clamp when welding Mylar to the cell. Patent document CN214313295 discloses a lithium battery hot-melt Mylar device, which uses a cylinder-driven pusher to clamp the cell. Because the plastic support of the battery top cover has a limited thickness for hot-melt Mylar, and the upper part of the cell is uneven, not using a clamp or directly pushing the cell to clamp the battery top cover may result in the Mylar not being hot-meltted onto the plastic support of the battery top cover, or the battery top cover being misaligned, leading to poor hot-melt effect and inconsistent overall height of the dry cell after Mylar wrapping, thus affecting subsequent processing steps. General cell fixing clamps are only suitable for cells of one size and cannot meet the production needs of batteries with the same size battery top cover of different heights in actual production. Summary of the Invention

[0004] This invention overcomes the shortcomings of existing battery cell clamps, which can only adapt to a single specification of battery cell and cannot meet the production needs of batteries with different heights of the same size battery cover. It provides a battery insulating film hot-melt clamp that can meet the positioning needs of batteries of different heights.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A battery insulating film hot-melt clamp includes a top cover fixing part and a cell fixing part. The top cover fixing part fixes the top cover. The cell fixing part includes a cell frame and a lifting plate. The cell frame is a frame whose inner wall surface is adapted to the shape of the cell. One end of the lifting plate is fixedly connected to the top cover fixing part. The cell frame is provided with a sliding groove arranged along the height direction. The other end of the lifting plate is movably connected to the sliding groove.

[0007] The fixture needs to position the battery cell and the top cover to ensure that the top cover fits snugly against the battery cell and that the top cover and the battery cell are level. For battery cells of different sizes with the same cross-section, the corresponding top cover size is also the same. This application achieves the purpose of accommodating battery cells of different heights by providing a top cover fixing part and a battery cell fixing part with adjustable relative distance. This application uses the top cover fixing part to fix the top cover, the battery cell fixing part to fix the bottom of the battery cell, and a lifting plate to adjust the distance between the two, thereby achieving the invention objective of battery cells of different heights and accommodating battery cells of different specifications.

[0008] Preferably, the sliding groove is provided with several positioning holes arranged along the height direction. The end of the lifting plate away from the top cover fixing part is the positioning end, and the positioning end is detachably connected to the positioning hole. The distance between the top cover fixing part and the battery cell fixing part is adjusted by the cooperation of the sliding groove and the positioning hole. The positioning end is inserted into the positioning hole by a fastener to provide support in the height direction to ensure the distance between the two.

[0009] Preferably, the positioning end is threadedly connected to the positioning hole. The threaded connection is reliable and removable, allowing for easy adjustment of the distance between the top cover fixing part and the battery cell fixing part.

[0010] Preferably, the positioning holes are arranged at equal intervals. This equal-interval arrangement of the positioning holes can cover a wider range of battery cell sizes, thereby improving the versatility of the fixture.

[0011] Preferably, the cell frame has several sliding holes arranged along the height direction, and guide rods are inserted into the sliding holes. The top end of the guide rods is fixedly connected to the top cover fixing part. The clamp realizes the lifting and lowering of the top cover fixing part and the cell fixing part through the cooperation of the sliding holes and the guide rods, ensuring that the two are parallel.

[0012] Preferably, the top cover fixing part includes a top cover frame and clamping sliders slidably connected to both ends of the top cover frame along its length. The top cover frame is a frame whose inner wall surface conforms to the shape of the battery cell. The clamping sliders are provided with grooves for positioning the top cover, and the grooves are formed in both the width and length directions of the clamping sliders. Through the above technical features, the top cover fixing part achieves the positioning of the top cover. The width of the groove is adapted to the thickness of the top cover, and the groove in the length direction guides the clamping sliders to move on the top cover until the top cover is inserted into the groove in the width direction. The clamping sliders on both sides feed simultaneously, achieving positioning of the top cover in both the length and width directions.

[0013] Preferably, the outer wall of the top cover frame is provided with a groove along its length, and the clamp slider is provided with a protrusion that adapts to the groove. The protrusion is inserted into the groove, and the clamp slider is fitted onto the top cover frame. Through the cooperation of the protrusion and the groove, the deflection angle and parallelism between the top cover frame and the clamp slider are guaranteed. Then, by positioning the top cover with the clamp slider, the positioning of the top cover and the battery cell is achieved.

[0014] Preferably, the clamp slider includes a side slider and an abutment block. The abutment block is fixedly connected to the side slider by fasteners. The side slider has a U-shaped cross-section, with its two ends extending upwards to form first top blocks. The opposing surfaces of the first top blocks have grooves along their length. The top left and right sides of the abutment block protrude to form second top blocks. The side of the second top block near the top cover has a groove along its width. A first insertion gap is formed between the first top block and the adjacent second top block, and a second insertion gap is formed between the two second top blocks. The side slider and the abutment block constitute the clamp slider by fasteners. The split structure reduces the processing difficulty. The abutment block and the side slider form a structure with one open end and one closed end. The open end is used to insert the top cover, and the closed end is used to abut against the top cover frame, restricting the position of the clamp slider. This prevents the clamp slider from sliding to the middle of the top cover frame, interfering with the insertion of the battery cell and the top cover. The first top block and the second top block respectively form the first insertion gap and the second insertion gap, providing a window for the hot melt gun to be inserted.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) the top cover fixing part and the battery cell fixing part are movably connected, which can adapt to different specifications of battery cells and has better versatility; (2) the structure of the top cover frame and the clamp slider ensures that the top cover is horizontal relative to the battery cell. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the clamp slider of the present invention;

[0018] Figure 3 This is a schematic diagram of the battery cell frame and top cover frame of the present invention;

[0019] Figure 4 This is a schematic diagram of the mounting top cover and battery cell of the present invention;

[0020] Figure 5 This is a schematic diagram showing the top cover and battery cell of the present invention after installation;

[0021] Figure 6 These are schematic diagrams of embodiments 2 and 3 of the present invention.

[0022] In the picture:

[0023] 1. Top cover; 2. Battery cell; 3. Hot melt position; 4. Battery cell frame; 5. First enclosure plate; 6. Lifting plate; 7. Positioning end; 8. Positioning hole; 9. Sliding hole; 10. Guide rod; 11. Top cover frame; 12. Second enclosure plate; 13. Slide groove; 14. Protrusion block; 15. Clamp slider; 16. Groove; 17. Side slider; 18. Abutment block; 19. First top block; 20. Second top block; 21. First insertion gap; 22. Second insertion gap; 23. Support pin; 24. Semicircular groove; 25. Horizontal section; 26. Inclined section; 27. Inclined hole. Detailed Implementation

[0024] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example 1:

[0026] A battery insulating film hot-melt clamp, such as Figure 4 and 5 As shown, it includes a top cover fixing part and a battery cell fixing part, which are movably connected.

[0027] like Figure 1 and 2As shown, the top cover fixing part is used to fix the top cover 1. The top cover fixing part includes a top cover frame 11 and clamping sliders 15 slidably connected to both ends of the top cover frame 11 in the length direction. The top cover frame 11 is a frame whose inner wall surface is adapted to the shape of the battery cell. Specifically, the top cover frame 11 includes four second surrounding plates 12, and the top cover frame 11 is rectangular. The top cover fixing part positions the top cover 1 through the clamping sliders 15. Specifically, the clamping sliders 15 are provided with grooves 16 for positioning the top cover 1. The grooves 16 are formed in the width and length directions of the clamping sliders 15. Through the above technical features, the positioning of the top cover 1 by the top cover fixing part is realized. The width of the groove 16 is adapted to the thickness of the top cover 1, and the groove 16 in the length direction guides the clamping sliders 15 to move on the top cover 1 until the top cover 1 is inserted into the groove 16 in the width direction. The clamping sliders 15 on both sides feed simultaneously, realizing the positioning of the top cover 1 in the length and width directions. The top cover frame 11 has grooves 13 on its outer side walls along its length on both sides in the width direction. The clamp slider 15 has protrusions 14 that are adapted to the grooves 13. The protrusions 14 are inserted into the grooves 13, and the clamp slider 15 is fitted onto the top cover frame 11. Through the cooperation of the protrusions 14 and the grooves 13, the deflection angle and parallelism between the top cover frame 11 and the clamp slider 15 are guaranteed. Then, by positioning the top cover 1 with the clamp slider 15, the positioning of the top cover 1 and the battery cell 2 is achieved. The clamp slider 15 includes a side slider 17 and an abutment block 18. The abutment block 18 is fixedly connected to the side slider 17 by fasteners. The side slider 17 has a U-shaped cross-section. The two ends of the side slider 17 extend upward to form a first top block 19. The facing surfaces of the first top blocks 19 are provided with grooves 16 arranged along the length direction. The top left and right sides of the abutment block 18 protrude to form second top blocks 20. The side of the second top block 20 near the top cover 1 is provided with a groove 16 arranged along the width direction. A first insertion gap 21 is provided between the first top block 19 and the adjacent second top block 20, and a second insertion gap 22 is formed between the two second top blocks 20. The side slider 17 and the abutment block 18 constitute the clamp slider 15 by fasteners. The split structure reduces the processing difficulty. The abutment block 18 and the side slider 17 form a structure with one end open and one end closed. The open end is used to insert into the top cover 1, and the closed end is used to abut against the top cover frame 11, restricting the position of the clamp slider 15. To prevent the clamp slider 15 from sliding to the middle of the top cover frame 11 and interfering with the insertion of the battery cell 2 and the top cover 1, the first top block 19 and the second top block 20 respectively form the first insertion gap 21 and the second insertion gap 22, providing a window for the insertion of the hot melt gun.

[0028] The cell fixing part includes a cell frame 4 and a lifting plate 6. The cell frame 4 includes four first surrounding plates 5. The cell frame 4 is a frame whose inner wall surface is adapted to the shape of the cell. In the height direction, the projections of the cell frame 4 and the top cover frame 11 coincide. One end of the lifting plate 6 is fixedly connected to the top cover frame 11. The cell frame 4 is provided with a sliding groove arranged along the height direction, and the other end of the lifting plate 6 is movably connected to the sliding groove. The middle parts of the two opposing second surrounding plates 12 are fixedly connected to the lifting plate 6 by fasteners. In some embodiments, the second surrounding plates 12 and the lifting plate 6 are fixedly connected by at least two fasteners. The sliding groove is provided with a plurality of positioning holes 8 arranged along the height direction. The end of the lifting plate 6 away from the top cover fixing part is a positioning end 7, and the positioning end 7 is detachably connected to the positioning holes 8. The distance between the top cover fixing part and the cell fixing part is adjusted by the cooperation of the sliding groove and the positioning holes 8. The positioning end 7 is inserted into the positioning hole 8 by fasteners to provide support force in the height direction to ensure the distance between the two. The positioning end 7 is threadedly connected to the positioning holes 8. This threaded connection offers reliability and detachability, allowing for easy adjustment of the spacing between the top cover fixing part and the cell fixing part. The positioning holes 8 are evenly spaced. This evenly spaced arrangement of the positioning holes 8 allows for the coverage of more cell sizes 2, thereby improving the versatility of the fixture.

[0029] like Figure 3 As shown, to ensure the relative horizontality of the top fixing part and the cell fixing part, four sliding holes 9 are provided on the cell frame 4 along the height direction. Guide rods 10 are inserted into the sliding holes 9, and the top ends of the guide rods 10 are fixedly connected to the top cover fixing part. The clamp realizes the lifting and lowering of the top cover fixing part and the cell fixing part through the cooperation of the sliding holes 9 and the guide rods 10, ensuring their parallelism.

[0030] The operating principle of this embodiment is as follows: Adjust the lifting plate 6 to maintain the distance between the top cover fixing part and the battery cell fixing part, then pull open the clamp sliders 15 on both sides, and then move the top cover 1 through the top cover frame 11. Then move the clamp sliders 15 closer together, and the groove 16 positions the edge of the top cover 1, thus achieving the positioning of the top cover 1. After positioning is completed, use a hot melt gun to heat melt the insulating film Mylar onto the plastic bracket of the top cover 1 through the first insertion gap 21 and the second insertion gap 22 at the hot melt position 3.

[0031] Example 2:

[0032] Example 2, based on Example 1, also has the following features:

[0033] like Figure 6As shown, the positioning of the top fixing part and the battery cell fixing part by the lifting plate 6 and the positioning hole 8 is as follows: For the selected battery cell 2 to be processed, the support nail 23 is fixedly connected at the corresponding positioning hole 8 position. At least part of the support nail 23 protrudes. The bottom of the lifting plate 6 is provided with a semi-circular groove 24, which abuts against the support nail 23.

[0034] Example 3:

[0035] This embodiment, based on embodiment 2, also has the following features:

[0036] like Figure 6 As shown, the guide rod 10 has a branch rod extending to the adjacent clamp slider 15 in the middle. The branch rod includes a horizontal section 25 and an inclined section 26. The horizontal section 25 extends outward, and its end extends beyond the top cover frame 11 in the height direction. The clamp slider 15 has a corresponding inclined hole 27. The inclined section 26 is higher at one end and lower at the other end near the clamp slider 15. The end of the inclined section 26 near the slider is located directly below the inclined hole 27.

[0037] The difference between this embodiment and embodiment 1 is that: the sliding hole is set on the top cover frame, the battery cell frame is provided with a corresponding threaded hole, and the guide rod 10 is threaded to the threaded hole to adjust the length of the guide rod extending out of the battery cell frame.

[0038] The operating principle of this embodiment is as follows:

[0039] Before inserting the battery cell 2 into the clamp, the top cover frame 11 is slightly raised, and the clamp slider 15 is raised relative to the battery cell frame 4. Under the action of the inclined section 26, the component force generated by the lifting generates a force that drives the clamp slider 15 to slide towards both sides of the top cover frame 11. In this way, the top cover fixing part automatically opens. After the battery cell 2 is inserted, the top cover frame 11 is released. Under the action of gravity, the top cover frame 11 returns to its original position and descends along the height direction. Correspondingly, gravity drives the clamp slider 15 to move closer through the component force generated by the inclined section 26, thereby positioning the top cover 1. This is coordinated with the movable connection of the lifting plate 6 and the support pin 23. The problem solved by this embodiment is that it is difficult to remove the battery cell 2 after the heat-melting process has been completed. To remove the battery cell 2 after the heat-melting process has been completed from the clamp, it is necessary to first pull the clamp slider 15 along the length direction, and then pinch the surface of the battery cell 2 from the short gap between the top cover 1 and the top cover frame 11 to remove it. The force-bearing area is small, and workers often use a tilting method to remove the battery cell 2. The technical solution of this embodiment allows the battery cell 2 to be held and lifted by the larger gap between the top cover frame 11 and the battery cell frame 4, thus increasing the distance between them. This causes the battery cell 2 and the top cover 11 to lift, driving the clamp slider 15 to move away, making it easy to remove the battery cell 2.

[0040] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A battery insulation film sheet hot melt fixture, characterized by, The top cover fixing part fixes the top cover, and the electric core fixing part includes an electric core frame and a lifting plate.

2. The battery insulation film hot melt fixture according to claim 1, characterized in that, The positioning end and the positioning hole are threadedly connected.

3. The battery insulation film hot melt fixture of claim 1, wherein, The top cover fixing part includes a top cover frame and clamp sliding blocks slidingly connected to both ends of the length direction of the top cover frame.

4. The battery insulation film hot melt fixture of claim 3, wherein, The outer side wall of the top cover frame is provided with a sliding groove along the length direction, and the clamp sliding block is provided with a protruding block matched with the sliding groove.

5. A battery separator hot melt fixture as claimed in claim 3 or 4, wherein, The clamp sliding block includes a side sliding block and an abutting block, the abutting block is fixedly connected to the side sliding block through a fastener, the cross section of the side sliding block is in U shape, the two ends of the side sliding block upwardly extend to form first top blocks, the opposite surfaces of the first top blocks are provided with grooves along the length direction, the top of the abutting block is provided with second top blocks on the left and right sides, one surface of the second top block close to the top cover is provided with a groove along the width direction, and the first top block and the adjacent second top block are provided with a first insertion gap, and the two second top blocks are provided with a second insertion gap.

Images