Base plate for negative electrode sheet production laser cutting

Abstract

The utility model provides a bottom plate for negative electrode sheet production laser cutting, which belongs to the technical field of lithium battery production and comprises a bottom plate body, a hollow air duct is arranged in the center of the bottom plate body, a choke iron plate is arranged in the center of the inside of the hollow air duct, and inclined plates are respectively arranged on two sides of the choke iron plate. Shaft rollers are arranged on the two sides of the bottom plate body correspondingly. Separating assemblies are arranged on the front side and the rear side of each shaft roller. Two lifting assemblies are arranged in the bottom plate body, located on the front side and the rear side of the shaft rollers correspondingly and drive the two shaft rollers to move up and down. According to the utility model, the foil is close to the surface of the bottom plate body and is not contacted with the surface of the bottom plate body, so that the foil is supported, the situation that the laser cutting quality or efficiency is poor due to the change of defocusing amount caused by the collapse of the foil is avoided, and meanwhile, the risk of foil collision caused by the bulge of the bottom plate or foreign matters is reduced.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of lithium battery production, specifically a base plate for laser cutting of negative electrode sheets. Background Technology

[0002] In the actual production process of lithium-ion batteries, during the negative electrode sheet making stage, after the second R-angle is cut by laser, the copper foil is sucked down by the dust removal negative pressure and collides with the base plate. The copper foil is lifted up, the laser defocusing amount changes, causing a chain reaction. In severe cases, the copper foil will be stuck in the dust removal box. At the same time, the electrode sheet is still being carried out, and the electrode sheet is torn, resulting in a breakage.

[0003] Currently, a layer of Teflon tape is often applied to the original substrate to reduce electrode friction and decrease the suction power of the negative pressure dust collector. However, after 10-20 minutes of production, laser cutting causes scorched edges on the Teflon tape. On one hand, these scorched edges may lift up, pushing up the copper foil and altering the laser defocusing, leading to adhesion problems and, in severe cases, tape breakage. On the other hand, the Teflon tape can hinder the removal of copper powder by the negative pressure pipe, reducing dust collection efficiency. Therefore, it is necessary to improve the negative electrode substrate to ensure production stability. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. Specifically, this utility model mainly provides a base plate for laser cutting of negative electrode sheets to solve the technical problems mentioned in the background.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A base plate for laser cutting of negative electrode sheet includes a base plate body, a hollow air duct is provided in the center of the base plate body, a flow-blocking iron plate is provided in the center of the hollow air duct, and inclined plates are provided on both sides of the flow-blocking iron plate.

[0007] The base plate body is provided with rollers on both sides. Each roller is provided with a separation component on both the front and rear sides. Each separation component includes a screw, a groove on the separation component, and a plug-in block adapted to the groove. The other end of the plug-in block is connected to a T-shaped plug-in block. The screw is provided with a T-shaped slot adapted to the T-shaped plug-in block. A screw sleeve is threadedly connected to the screw.

[0008] The base plate body is equipped with two sets of lifting components. The two sets of lifting components are located on the front and rear sides of the rollers, respectively, and drive the two rollers to move up and down.

[0009] Preferably, the base plate and the inclined plate are provided with a number of evenly distributed air holes.

[0010] Preferably, the flow-blocking plate is triangular in shape.

[0011] Preferably, each of the inclined plates is inclined from top to bottom from the side of the adjacent roller to the center of the base plate body.

[0012] Preferably, each of the lifting components includes a movable rod slidably installed inside the base plate body, with lifting blocks installed at both ends of the movable rod, and a lifting block provided on one side of the lifting block, the lifting block sliding up and down inside the base plate body.

[0013] Preferably, the screw is rotatably mounted on one side of the lifting block.

[0014] Preferably, the lifting assembly further includes a rotating disk rotatably installed inside the base plate body, a threaded rod is installed on the rotating disk, and a drive rod is threadedly connected to the threaded rod.

[0015] Preferably, the drive rod is connected to the moving rod, and one end of the rotating disk extends outside the base plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] (1) This utility model uses a roller to lift the foil. The roller can be raised and lowered by manually rotating the rotating disk, so that the foil and the base plate body surface are close but not in contact, which supports the foil and avoids the foil from collapsing and causing changes in the defocus amount, which would result in poor laser cutting quality or efficiency. At the same time, it reduces the risk of foil collision caused by the base plate protrusion or foreign objects.

[0018] (2) This utility model adopts an inclined plate, air hole and flow-blocking iron plate. The foil will be laser-cut into tabs on the base plate. The tabs can be discharged directly from the hollow air channel through the inclined plate. The inclined plate plays a guiding role to avoid the tabs from directly colliding with the base plate body and causing sticking. Secondly, metal often generates a lot of fine dust during the laser cutting process. Due to the existence of the hollow air channel, the dust removal air of the negative pressure dust collector can directly carry away the dust from the laser cutting position. In addition, due to the existence of the air hole and flow-blocking iron plate, the foil can be prevented from being directly sucked by the negative pressure. The laser after passing through the foil will hit the flow-blocking iron plate, avoiding damage to the negative pressure dust collector and ensuring the practicality of the base plate.

[0019] (3) When the shaft roller needs to be replaced, simply rotate the threaded sleeves on both sides of the shaft roller so that the threaded sleeves do not contact the T-shaped inserts, then remove the shaft roller and remove the inserts on both sides of the shaft roller; then, take out the new shaft roller and repeat the above steps in reverse. Replacing the shaft roller is convenient and quick.

[0020] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the base plate structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the shaft roller, lifting assembly, and separating assembly of this utility model;

[0023] Figure 3 This is a schematic diagram of the lifting assembly and the separating assembly of this utility model;

[0024] Figure 4 This is a schematic diagram of the screw, screw sleeve, and T-shaped insert of this utility model.

[0025] In the picture:

[0026] 10. Base plate body; 101. Hollowed-out air duct; 102. Flow-blocking iron plate; 103. Inclined plate; 104. Air hole;

[0027] 20. Shaft roller; 201. Groove; 202. Insert block; 203. T-shaped insert block; 204. Screw; 205. Screw sleeve;

[0028] 301. Moving rod; 302. Lifting step block; 303. Lifting block; 304. Rotary disc; 305. Threaded rod; 306. Drive rod. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Example 1:

[0033] Please refer carefully to the attached diagram. Figure 1 A base plate for laser cutting of negative electrode wafers includes a base plate body 10. A perforated air duct 101 is disposed at the center of the base plate body 10. A flow-blocking iron plate 102 is disposed at the center inside the perforated air duct 101. Inclined ramps 103 are disposed on both sides of the flow-blocking iron plate 102. Rollers 20 are disposed on both sides of the base plate body 10. A plurality of evenly distributed air holes 104 are disposed on the base plate body 10 and the ramps 103. The flow-blocking iron plate 102 is triangular in shape. Each ramp 103 slopes downwards from one side of the adjacent roller 20 to the center of the base plate body 10. The roller surface forms a 3-5° angle with the plane of the base plate, and tension adjustment is achieved in conjunction with a servo drive system.

[0034] Before laser cutting, the base plate body 10 is inserted under the foil and placed above the negative pressure dust collector. Then, the upward-moving roller 20 lifts the foil, making the foil and the surface of the base plate body 10 close but not in contact. This provides support for the foil, preventing it from sagging and causing changes in defocus, which could lead to poor laser cutting quality or efficiency. It also reduces the risk of foil collisions caused by protrusions or foreign objects on the base plate, or adhesion caused by the tabs colliding with the base plate. The film cutting machine is started, and the foil will be laser-cut with tabs above the base plate. The tabs pass through the inclined plate 103. The dust is discharged directly from the hollow air duct 101. The inclined plate 103 acts as a guide to prevent the electrode tab from colliding directly with the base plate 10. Metal often generates a large amount of fine dust during laser cutting. Due to the hollow air duct 101, the dust removal air of the negative pressure dust collector can directly carry away the dust from the laser cutting position. At the same time, due to the air hole 104 and the flow-blocking iron plate 102, the foil material is prevented from being directly sucked by the negative pressure. Furthermore, the laser after passing through the foil material will hit the flow-blocking iron plate 102, thus avoiding damage to the negative pressure dust collector.

[0035] Example 2:

[0036] Please refer carefully to the attached diagram. Figures 1-4The base plate body 10 has rollers 20 on both sides. Each roller 20 has a separation component on both the front and rear sides. Each separation component includes a screw 204, a groove 201 on the separation component, and a plug-in block 202 that matches the groove 201. The other end of the plug-in block 202 is connected to a T-shaped plug 203. The screw 204 has a T-shaped slot that matches the T-shaped plug 203. A threaded sleeve 205 is threaded onto the screw 204. When the roller 20 needs to be replaced, simply rotate the threaded sleeves 205 on both sides of the roller 20 so that the threaded sleeves 205 do not contact the T-shaped plug 203, then remove the roller 20, and then remove the plug-in blocks 202 on both sides of the roller 20. Then, take out a new roller 20 and repeat the above steps in reverse.

[0037] Example 3:

[0038] Please refer carefully to the attached diagram. Figures 1-3 The base plate body 10 has two sets of lifting components inside, located on the front and rear sides of the rollers 20 respectively, driving the rollers 20 to move up and down. Each lifting component includes a movable rod 301 slidably installed inside the base plate body 10. Lifting blocks 302 are installed at both ends of the movable rod 301, and a lifting block 303 is provided on one side of each lifting block 302. The lifting block 303 slides up and down inside the base plate body 10. A screw 204 is rotatably installed on one side of the lifting block 303. The lifting component also includes a rotating disk 304 rotatably installed inside the base plate body 10. A threaded rod 305 is installed on the rotating disk 304, and a drive rod 306 is threadedly connected to the threaded rod 305. The drive rod 306 is connected to the movable rod 301, and one end of the rotating disk 304 extends outside the base plate body 10. Manually rotating the rotary disk 304 causes the threaded rod 305 to rotate, which in turn causes the drive rod 306 to push the moving rod 301 to move. The lifting block 302 moves along with the moving rod 301, thereby lifting the lifting block 303 upward and realizing the movement of the shaft roller 20.

[0039] Detailed operation steps:

[0040] Before laser cutting, insert the base plate body 10 under the foil material and place it above the negative pressure dust collector; then manually rotate the rotating disk 304 to drive the threaded rod 305 to rotate, so that the drive rod 306 pushes the moving rod 301 to move, and the lifting block 302 moves with the moving rod 301, thereby lifting the lifting block 303 upward and realizing the upward movement of the shaft roller 20.

[0041] When the film-making machine is started, the foil will be laser-cut into tabs above the base plate. The tabs will be discharged directly from the hollow air duct 101 through the inclined plate 103. The dust removal air of the negative pressure dust collector can directly carry away the dust from the laser cutting position.

[0042] After laser cutting, if it is necessary to replace the shaft roller 20, simply rotate the threaded sleeves 205 on both sides of the shaft roller 20 so that the threaded sleeves 205 do not contact the T-shaped inserts 203, then remove the shaft roller 20, and then remove the inserts 202 on both sides of the shaft roller 20; then, take out the new shaft roller 20 and repeat the above steps in reverse.

[0043] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A base plate for laser cutting of negative electrode wafers, comprising a base plate body (10), characterized in that: The base plate body (10) has a hollow air duct (101) at its center, and a flow-blocking iron plate (102) is provided in the center of the hollow air duct (101). Inclined inclined plates (103) are provided on both sides of the flow-blocking iron plate (102). The base plate body (10) is provided with rollers (20) on both sides. Each roller (20) is provided with a separation component on both the front and rear sides. Each separation component includes a screw (204), a groove (201) provided on the separation component, and a plug block (202) adapted to the groove (201). The other end of the plug block (202) is connected to a T-shaped plug block (203). The screw (204) is provided with a T-shaped slot adapted to the T-shaped plug block (203). A screw sleeve (205) is threadedly connected to the screw (204). The base plate body (10) is provided with two sets of lifting components. The two sets of lifting components are located on the front and rear sides of the shaft roller (20) respectively, and drive the two shaft rollers (20) to move up and down.

2. The base plate for laser cutting of negative electrode wafers according to claim 1, characterized in that: The base plate (10) and the inclined plate (103) are provided with a number of evenly distributed air holes (104).

3. The base plate for laser cutting of negative electrode wafers according to claim 1, characterized in that: The flow-blocking iron plate (102) is triangular in shape.

4. The base plate for laser cutting of negative electrode wafers according to claim 1, characterized in that: Each of the inclined plates (103) is inclined from top to bottom from the side of the adjacent roller (20) to the center side of the base plate body (10).

5. The base plate for laser cutting of negative electrode wafers according to claim 1, characterized in that: Each of the lifting components includes a movable rod (301) slidably installed inside the base plate body (10), with lifting blocks (302) installed at both ends of the movable rod (301), and a lifting block (303) provided on one side of the lifting block (302), the lifting block (303) sliding up and down inside the base plate body (10).

6. The base plate for laser cutting of negative electrode wafers according to claim 5, characterized in that: The screw (204) is rotatably mounted on one side of the lifting block (303).

7. The base plate for laser cutting of negative electrode wafers according to claim 5, characterized in that: The lifting assembly also includes a rotating disk (304) rotatably installed inside the base plate body (10), a threaded rod (305) is installed on the rotating disk (304), and a drive rod (306) is threadedly connected to the threaded rod (305).

8. A base plate for laser cutting of negative electrode wafers according to claim 7, characterized in that: The drive rod (306) is connected to the moving rod (301), and one end of the rotating disk (304) extends outside the base plate body (10).

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