Lithium battery negative electrode tab shaping device

Abstract

The utility model discloses a lithium battery negative pole lug shaping device which comprises a first embossing mechanism and a second embossing mechanism, the first embossing mechanism is used for embossing on the front side of a negative pole lug, and the second embossing mechanism is used for embossing on the back side of the negative pole lug; the first knurling mechanism comprises a first knurling roller and a first traction roller which are arranged close to each other, the first traction roller is rotatably connected with a first fixed seat, a plurality of parallel vertical stripes are uniformly arranged on the surface of the first knurling roller, the first knurling roller is rotatably connected with a first support, and the first support is slidably connected with a first guide rail. According to the lithium battery negative electrode tab shaping device, two groups of different embossing mechanisms are adopted to press patterns with different shapes on the front and back surfaces of the lithium battery negative electrode tab, the vertical stripes on the front surface can longitudinally support the tab, and the rhombic patterns on the back surface can transversely support the tab, so that the tab shaping effect is better, and the tab is not easy to fold when passing through a roller.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production and processing, and in particular to a lithium battery negative electrode tab shaping device. Background Art

[0002] Copper has the advantages of good ductility, high conductivity, and low resistivity, and can be used as the negative electrode substrate material of lithium-ion batteries. At present, the thickness of copper foil used in the negative electrode substrate of lithium-ion batteries tends to be thinner and thinner. However, due to the high density of copper (8.96g / cm3), the thinner the copper foil, the more likely the negative electrode tab will collapse, causing the tab to be folded or damaged during the roller process, affecting production.

[0003] Therefore, in order to improve product quality and product qualification rate, it is crucial to solve the problem of negative electrode tab collapse. Utility Model Content

[0004] 1. Technical problems to be solved:

[0005] In view of the above technical problems, the utility model provides a lithium battery negative electrode tab shaping device.

[0006] 2. Technical solution:

[0007] A lithium battery negative electrode tab shaping device comprises a first embossing mechanism and a second embossing mechanism, wherein the first embossing mechanism is used for embossing the front side of the negative electrode tab, and the second embossing mechanism is used for embossing the back side of the negative electrode tab; the first embossing mechanism comprises a first embossing roller and a first traction roller arranged close to each other, the first traction roller is rotatably connected to a first fixed seat, a surface of the first embossing roller is evenly provided with a plurality of parallel vertical stripes, the first embossing roller is rotatably connected to a first support, the first support is slidably connected to a first guide rail, the first support is fixedly connected to a movable end of a first propulsion cylinder, and the first propulsion cylinder is fixed to the first fixed seat;

[0008] The second embossing mechanism includes a second embossing roller and a second traction roller which are arranged closely together. The second traction roller is rotatably connected to the second fixed seat. A plurality of diamond patterns are evenly arranged on the surface of the second embossing roller. The second embossing roller is rotatably connected to the second support. The second support is slidably connected to the second guide rail. The second support is fixedly connected to the movable end of the second propulsion cylinder. The second propulsion cylinder is fixed on the second fixed seat.

[0009] Preferably, the protrusion height of the vertical stripes of the first embossing roller is 1 mm.

[0010] Preferably, the raised edges and bottom corners of the vertical stripes of the first embossing roller are both smooth rounded corners.

[0011] Preferably, the first traction roller and the second traction roller are both smooth cylindrical rollers.

[0012] Preferably, the protrusion height of the diamond pattern of the second embossing roller is 1 mm.

[0013] Preferably, the raised edges and bottom corners of the diamond pattern on the second embossing roller are both smooth and rounded.

[0014] 3. Beneficial effects:

[0015] The utility model discloses a lithium battery negative electrode tab shaping device that adopts two groups of different embossing mechanisms to emboss patterns of different shapes on the front and back sides of the lithium battery negative electrode tab, wherein continuous and uniform vertical stripes are embossed on the front side, and uniform diamond patterns are embossed on the back side. The vertical stripes can support the tab longitudinally, and the diamond patterns can support the tab laterally, so that the tab shaping effect is better, the tab is not easy to be folded when passing the roller, and the negative electrode tab cut by subsequent laser is not easy to collapse, so as to prevent the quality problem of tab collapse leading to tab folding and damage during the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the negative electrode tab shaping device for a lithium battery of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the first embossing mechanism of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the second embossing mechanism of the utility model. DETAILED DESCRIPTION

[0019] The utility model is described in detail below in conjunction with the accompanying drawings.

[0020] As attached Figure 1 To Attachment Figure 3 As shown,

[0021] Specific embodiment: A lithium battery negative electrode tab shaping device, comprising a first embossing mechanism 1 and a second embossing mechanism 2, wherein the first embossing mechanism 1 is used for embossing the front side of the negative electrode tab, and the second embossing mechanism 2 is used for embossing the back side of the negative electrode tab; the first embossing mechanism 1 comprises a first embossing roller 3 and a first traction roller 4 arranged close to each other, the first traction roller 4 is rotatably connected to a first fixed seat 5, a plurality of parallel vertical stripes 6 are evenly arranged on the surface of the first embossing roller 3, the first embossing roller 3 is rotatably connected to a first support 7, the first support 7 is slidably connected to a first guide rail 8, the first support 7 is fixedly connected to the movable end of a first propulsion cylinder 9, and the first propulsion cylinder 9 is fixed on the first fixed seat 5;

[0022] The second embossing mechanism 2 includes a second embossing roller 10 and a second traction roller 11 which are arranged closely together. The second traction roller 11 is rotatably connected to a second fixed seat 12. A plurality of diamond patterns 13 are evenly arranged on the surface of the second embossing roller 10. The second embossing roller 10 is rotatably connected to a second support 14. The second support 14 is slidably connected to a second guide rail 15. The second support 14 is fixedly connected to the movable end of a second propulsion cylinder 16. The second propulsion cylinder 16 is fixed on the second fixed seat 12.

[0023] It should be noted that the first embossing roller 3, the first pulling roller 4, the second embossing roller 10 and the second pulling roller 11 are all provided with a driving mechanism for driving. In addition, since only a part of the length of the negative electrode tab is copper foil, the embossing roller is set shorter than the pulling roller, generally 1 / 3 of the corresponding length of the pulling roller.

[0024] like Figure 1 As shown, the negative electrode sheet of the lithium battery passes through the first embossing roller 3 and the first traction roller 4, and the second embossing roller 10 and the second traction roller 11 in the direction indicated by the arrow. The first embossing roller 3 is pushed close to the first traction roller 4 by the first propulsion cylinder 9, and the rolling gap size of the first embossing mechanism 1 is adjusted. The first embossing roller 3 and the first traction roller 4 rotate simultaneously to roll the front side of the negative electrode sheet of the lithium battery. The second embossing roller 10 is pushed close to the second traction roller 11 by the second propulsion cylinder 16, and the rolling gap size of the second embossing mechanism 2 is adjusted. The second embossing roller 10 and the second traction roller 11 rotate simultaneously to roll the back side of the negative electrode sheet of the lithium battery.

[0025] The convex height of the vertical stripes 6 of the first embossing roller 3 is 1 mm. Preferably, the convex edges and bottom corners of the vertical stripes 6 of the first embossing roller 3 are smooth rounded corners to prevent the copper foil from being broken due to excessive rolling.

[0026] The first pulling roller 4 and the second pulling roller 11 are both smooth cylindrical rollers.

[0027] The raised height of the diamond pattern 13 of the second embossing roller 10 is 1 mm. Preferably, the raised edges and bottom corners of the diamond pattern 13 on the second embossing roller 10 are smooth and rounded to prevent the copper foil from being broken due to excessive rolling.

[0028] Although the present invention has been disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection defined by the claims of this application.

Claims

1. A lithium battery negative electrode tab shaping device, characterized in that: It includes a first embossing mechanism and a second embossing mechanism, the first embossing mechanism is used for embossing on the front side of the negative electrode tab, and the second embossing mechanism is used for embossing on the back side of the negative electrode tab; the first embossing mechanism includes a first embossing roller and a first traction roller which are arranged close to each other, the first traction roller is rotatably connected to the first fixed seat, a plurality of parallel vertical stripes are evenly arranged on the surface of the first embossing roller, the first embossing roller is rotatably connected to the first support, the first support is slidably connected to the first guide rail, the first support is fixedly connected to the movable end of the first propulsion cylinder, and the first propulsion cylinder is fixed on the first fixed seat; The second embossing mechanism includes a second embossing roller and a second traction roller which are arranged closely together. The second traction roller is rotatably connected to the second fixed seat. A plurality of diamond patterns are evenly arranged on the surface of the second embossing roller. The second embossing roller is rotatably connected to the second support. The second support is slidably connected to the second guide rail. The second support is fixedly connected to the movable end of the second propulsion cylinder. The second propulsion cylinder is fixed on the second fixed seat.

2. A lithium battery negative electrode tab shaping device according to claim 1, characterized in that: The protrusion height of the vertical stripes of the first embossing roller is 1 mm.

3. A lithium battery negative electrode tab shaping device according to claim 2, characterized in that: The raised edges and bottom corners of the vertical stripes of the first embossing roller are both smooth rounded corners.

4. A lithium battery negative electrode tab shaping device according to claim 1, characterized in that: The first traction roller and the second traction roller are both smooth cylindrical rollers.

5. A lithium battery negative electrode tab shaping device according to claim 1, characterized in that: The protrusion height of the diamond pattern of the second embossing roller is 1 mm.

6. A lithium battery negative electrode tab shaping device according to claim 5, characterized in that: The raised edges and bottom corners of the diamond pattern on the second embossing roller are both smooth and rounded.

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