Tab laser cutting anti-wrinkle passing roller and tab laser cutting device

Abstract

The utility model relates to a pole lug laser cutting anti-wrinkle passing roller and a pole lug laser cutting device, the pole lug laser cutting anti-wrinkle passing roller comprises a core shaft, the core shaft is provided with an adsorption groove extending from the outer surface of the core shaft to the inside of the core shaft, and the core shaft is further provided with a vacuumizing hole communicated with the adsorption groove; the sleeve is rotationally mounted on the mandrel, and a plurality of adsorption through holes I are distributed in the sleeve; and the vacuumizing pipeline is connected with the vacuumizing hole. Negative pressure is generated at the position of the adsorption groove, when waste is separated from a tab, namely when the pole piece enters the passing roller, the cut pole piece enters the passing roller from the position where the adsorption groove is located, the cut pole piece can be adsorbed to the sleeve, the tab can be stably adsorbed, meanwhile, the pole piece drives the sleeve to rotate, and therefore the waste can be separated from the tab. According to the utility model, different adsorption through holes I in the sleeve correspond to the adsorption grooves, so that the adsorption effect on the entering pole pieces can be always realized, the pole lugs can be stably wrapped on the sleeve, the wrinkling of the pole lugs is reduced, and the qualified rate of battery cells is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrode laser cutting technology, and in particular to an anti-wrinkle roller for electrode laser cutting and an electrode laser cutting device. Background Technology

[0002] In battery production, whether it's cutting coiled cells or stacking cells, the electrode sheets need to be laser-cut for tabs. During laser tab cutting, a vacuum conveyor belt typically carries away continuous tab-cutting waste, while rollers carry away the cut electrode sheets. For example, patent CN211135931U discloses a vertical laser cutting mechanism for electrode sheets, including a cutting mechanism frame, cutting support components, and receiving rollers. Supported by upper and lower cutting support rollers, and with tension control, the strip-shaped electrode sheets are straightened, achieving continuous vertical conveyor belt movement. The vacuum conveyor belt has ventilation holes and adheres to the surface of the receiving vacuum box. When the electrode sheet passes through the receiving vacuum box, it is attracted to the surface due to vacuum suction, preventing fluctuations in the electrode sheet at the cutting position and effectively ensuring cutting accuracy and effect. After the upper laser cutting is completed, a discontinuous waste edge is formed, which seamlessly connects with the lower vacuum conveyor belt. The rotating vacuum conveyor belt pulls the waste edge downwards, and when it detaches from the vacuum conveyor belt, the waste automatically falls, completing edge-free cutting.

[0003] Because the tabs are located on the outer edge of the electrode sheet, are discontinuous structures, and are extremely thin, they are prone to wrinkling during the rolling process after the electrode sheet is cut, thus affecting the quality of the produced battery cells. Existing methods to prevent tab wrinkling during rolling involve smoothing the tabs using guide plates or brushes, but damage to the tabs still occurs. If the tabs are tilted at a large angle during rolling, damage is difficult to avoid. Utility Model Content

[0004] Based on this, in order to address the technical problem that the electrode tabs are prone to wrinkling during the process of passing the cut electrode sheets through the roller in the prior art, this utility model provides an electrode tab laser cutting anti-wrinkle roller and an electrode tab laser cutting device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model first provides a laser-cut anti-wrinkle roller for electrode tabs, which includes:

[0007] The mandrel has an adsorption groove extending from its outer surface to its interior, and a vacuum hole communicating with the adsorption groove is also provided on it.

[0008] A sleeve, rotatably mounted on a mandrel and having multiple adsorption through holes distributed thereon; and

[0009] A vacuum pipe that connects to a vacuum port.

[0010] This invention connects a vacuum pipe to an external vacuum device by setting a mandrel and a sleeve that rotates with the mandrel. A negative pressure is generated at the adsorption tank. When the waste material separates from the electrode tabs, that is, when the electrode sheets enter the roller, the cut electrode sheets enter the roller from the adsorption tank. The cut electrode sheets are adsorbed onto the sleeve, stably adsorbing the electrode tabs. Simultaneously, the electrode sheets drive the sleeve to rotate, aligning different adsorption through-holes on the sleeve with the adsorption tank, ensuring continuous adsorption of the entering electrode sheets. This stably wraps the electrode tabs around the sleeve, reducing wrinkling and improving the cell yield. Through the structure of the adsorption tank and the adsorption through-holes on the sleeve, this invention accurately adsorbs the electrode tabs, avoiding adsorption of the entire sleeve surface, increasing the adsorption force, reducing vacuum waste, and providing accurate and adjustable adsorption direction for stable separation of waste material and electrode tabs.

[0011] As a further improvement of the above-mentioned solution of this utility model, the mandrel is axially extended with a central through hole, the adsorption groove is connected to the central through hole, and the vacuum hole is formed at both ends of the central through hole.

[0012] As a further improvement to the above-mentioned solution of this utility model, the adsorption tank has a V-shaped cross section.

[0013] As a further improvement to the above-mentioned solution of this utility model, the two ends of the sleeve are connected to limit seats, and the limit seats are rotatably mounted on the mandrel through bearings.

[0014] As a further improvement of the above-mentioned solution of this utility model, the sleeve is provided with multiple holes in the circumferential direction, and each of the holes includes multiple adsorption through holes arranged at intervals along the axial direction of the sleeve.

[0015] As a further improvement to the above-mentioned solution of this utility model, a pressure regulating valve and a speed regulating valve are provided on the vacuum pipe. The pressure regulating valve and speed regulating valve on the vacuum pipe at both ends of the mandrel can precisely control the adsorption force and speed, thereby achieving a better adsorption effect. When the electrode tab passes through the roller, a more uniform pressure can be applied to the electrode tab, reducing damage to the electrode tab.

[0016] This utility model also proposes an electrode tab laser cutting device for laser cutting electrode tabs on electrode sheets. It includes the electrode tab laser cutting anti-wrinkle roller as described above, and the electrode sheet enters the electrode tab laser cutting anti-wrinkle roller from the position where the sleeve and the adsorption groove are opposite.

[0017] As a further improvement of the above-mentioned solution of this utility model, the electrode laser cutting device further includes a vacuum belt for adsorbing waste materials. The vacuum belt includes a drive roller, a drive mechanism for driving the drive roller to rotate, a driven roller, a belt wound on the drive roller and the driven roller, a vacuum box disposed in the belt, and a negative pressure pipe connected to the vacuum box. The vacuum box has a through hole on the side facing the electrode laser cutting anti-wrinkle roller. The belt has a plurality of adsorption through holes. A baffle is disposed between the belt and the vacuum box, and the baffle is disposed opposite to the adsorption tank.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention connects a vacuum pipe to an external vacuuming device by setting a mandrel and a sleeve that rotates with the mandrel. A negative pressure is generated at the adsorption tank. When the waste material separates from the tabs, that is, when the electrode enters the roller, the cut electrode enters the roller from the adsorption tank. The cut electrode is adsorbed onto the sleeve, stably adsorbing the tabs. Simultaneously, the electrode drives the sleeve to rotate, aligning different adsorption holes on the sleeve with the adsorption tank, thus ensuring continuous adsorption of the entering electrode. This stably wraps the tabs on the sleeve, reducing tab wrinkling and improving the cell yield.

[0020] This invention, through the structure of the adsorption tank and the adsorption through hole on the sleeve, can accurately adsorb the electrode tabs, avoid adsorption of the entire sleeve surface, improve the adsorption force of the electrode tabs, reduce vacuum waste, and the adsorption direction is accurately adjustable, which can achieve stable separation of waste materials and electrode tabs.

[0021] This invention features pressure regulating valves and speed regulating valves on the vacuum pipes at both ends of the mandrel, which can precisely control the adsorption force and speed to achieve a better adsorption effect. When the electrode passes through the roller, it can apply more uniform pressure to the electrode, reducing electrode damage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an anti-wrinkle roller for laser cutting of electrode tabs according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a laser-cut anti-wrinkle roller mandrel according to an embodiment of the present invention;

[0024] Figure 3 for Figure 1 Sectional view along line AA;

[0025] Figure 4 for Figure 1 Sectional view along the BB direction;

[0026] Figure 5 This is a schematic diagram of the structure of a tab laser cutting device proposed in an embodiment of the present invention.

[0027] Reference numerals: 1. Mandrel; 101. Adsorption tank; 102. Vacuum hole; 103. Central through hole; 2. Sleeve; 201. Adsorption through hole one; 3. Limiting seat; 4. Bearing; 5. Electrode; 6. Vacuum belt; 7. Base; 8. Laser mechanism; 9. Waste material. Detailed Implementation

[0028] To facilitate understanding of this invention, a more comprehensive description of the invention will be provided below with reference to specific embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0030] Reference Figure 1 This embodiment proposes a laser-cut anti-wrinkle roller for electrode tabs, which includes a mandrel 1, a sleeve 2, and a vacuum pipe (not shown).

[0031] Combination Figure 2 In this embodiment, the mandrel 1 includes a large cylindrical section and small cylindrical sections disposed at both ends of the large cylindrical section. The mandrel 1 has a central through hole 103 extending through it axially, and vacuum holes 102 for connecting to a vacuum pipe are formed at both ends of the central through hole 103. The large cylindrical section of the mandrel 1 has an adsorption groove 101 extending from its outer surface to its interior, and the adsorption groove 101 has a V-shaped cross section.

[0032] Combination Figure 3 , Figure 4 The sleeve 2 is fitted onto the large cylindrical section of the mandrel 1. Both ends of the sleeve 2 are fitted with limiting seats 3, and the two limiting seats 3 are rotatably connected to two small cylindrical sections via bearings 4. This structural arrangement allows the sleeve 2 to rotate relative to the mandrel 1. The sleeve 2 has multiple holes circumferentially, each including multiple adsorption through holes 201 spaced apart along the axial direction of the sleeve 2.

[0033] The vacuum pipe is connected to the two vacuum holes 102 of the mandrel 1, and is used to connect to vacuum equipment (such as a vacuum pump). In this embodiment, the vacuum pipe is equipped with a pressure regulating valve and a speed regulating valve.

[0034] Reference Figure 5 This embodiment, based on the above-mentioned anti-wrinkle roller for laser cutting of electrode tabs, further proposes an electrode tab laser cutting device for laser cutting electrode tabs on electrode sheets 5. It includes the aforementioned anti-wrinkle roller for laser cutting of electrode tabs, and also includes a base 7, a feed roller, a take-up roller, a laser mechanism 8, and a vacuum conveyor belt 6. The two small cylindrical sections of the mandrel 1 are fixedly mounted on the base 7 via a bracket. The feed roller is located above the anti-wrinkle roller for laser cutting of electrode tabs. The electrode sheet 5 to be cut passes over the feed roller and then enters the anti-wrinkle roller for laser cutting of electrode tabs from the position opposite to the adsorption tank 101 of the sleeve 2, and then passes over the anti-wrinkle roller for laser cutting of electrode tabs and enters the take-up roller. The laser mechanism 8 is mounted on the base 7 and is used to emit a laser to laser cut the electrode tabs on the electrode sheet 5. The vacuum conveyor belt 6 is used to adsorb the waste material 9 generated by laser cutting, and the base 7 is provided with a waste material outlet located below the vacuum conveyor belt 6. In this embodiment, the vacuum belt conveyor 6 includes a drive roller, a drive mechanism for driving the drive roller to rotate, a driven roller, a belt wound around the drive roller and the driven roller, a vacuum box disposed within the belt, and a negative pressure pipe connected to the vacuum box. The vacuum box has a through hole on the side facing the laser-cut anti-wrinkle roller of the electrode tab. The belt has multiple adsorption through holes. A baffle is disposed between the belt and the vacuum box, and the baffle is opposite to the adsorption groove 101. This embodiment of the vacuum belt conveyor 6 uses existing technology, except that a baffle is disposed between the belt and the vacuum box.

[0035] With the above structural configuration, in this embodiment, the electrode laser cutting device emits a laser to cut a predetermined shape of electrode tab on the electrode sheet 5 during operation. The vacuum belt 6 adsorbs the waste material 9. The cut electrode sheet 5 enters the electrode laser cutting anti-wrinkle roller from the position on the sleeve 2 opposite to the adsorption groove 101. Since the mandrel 1 is connected to the vacuum equipment, there is a negative pressure at the adsorption groove 101, which can adsorb the electrode sheet 5 entering the roller onto the sleeve 2. At the same time, the electrode sheet 5 drives the sleeve 2 to rotate. And due to the presence of the baffle, the vacuum belt 6 will not pull on the electrode sheet 5 at the moment the roller adsorbs it, thereby preventing the electrode tab from wrinkling and achieving stable separation of the electrode tab and the waste material 9. The electrode tab can be stably wrapped on the roller, reducing electrode tab wrinkling and improving the cell quality. In addition, by adjusting the pressure regulating valve and the speed regulating valve, the adsorption force and speed can be precisely controlled, thereby achieving a better adsorption effect.

[0036] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A laser-cut anti-wrinkle roller for electrode tabs, characterized in that, It includes: The mandrel (1) has an adsorption groove (101) extending from its outer surface to its interior, and a vacuum hole (102) communicating with the adsorption groove (101) is also provided thereon. A sleeve (2), which is rotatably mounted on a mandrel (1) and has a plurality of adsorption through holes (201) distributed thereon; and A vacuum pipe is connected to a vacuum port (102).

2. The anti-wrinkle roller for laser cutting of electrode tabs according to claim 1, characterized in that, The mandrel (1) has a central through hole (103) through it axially. The adsorption groove (101) is connected to the central through hole (103) and the vacuum hole (102) is formed at both ends of the central through hole (103).

3. The anti-wrinkle roller for laser cutting of electrode tabs according to claim 1, characterized in that, The adsorption tank (101) has a V-shaped cross section.

4. The anti-wrinkle roller for laser cutting of electrode tabs according to claim 1, characterized in that, The sleeve (2) is connected to the limiting seat (3) at both ends, and the limiting seat (3) is rotatably mounted on the spindle (1) through the bearing (4).

5. The anti-wrinkle roller for laser cutting of electrode tabs according to claim 1, characterized in that, The sleeve (2) is provided with a plurality of holes in the circumferential direction, and each of the holes includes a plurality of adsorption through holes (201) arranged at intervals along the axial direction of the sleeve (2).

6. The anti-wrinkle roller for laser cutting of electrode tabs according to claim 1, characterized in that, The vacuum pipeline is equipped with a pressure regulating valve and a speed regulating valve.

7. A laser cutting device for electrode tabs, used for laser cutting electrode tabs on electrode sheets (5), characterized in that, It includes a laser-cut anti-wrinkle roller for electrode tabs as described in any one of claims 1-6, wherein the electrode (5) enters the laser-cut anti-wrinkle roller for electrode tabs from a position opposite to the adsorption groove (101) of the sleeve (2).

8. The electrode laser cutting device according to claim 7, characterized in that, The electrode laser cutting device also includes a vacuum belt (6) for adsorbing waste material (9). The vacuum belt (6) includes a drive roller, a drive mechanism for driving the drive roller to rotate, a driven roller, a belt wound on the drive roller and the driven roller, a vacuum box disposed in the belt, and a negative pressure pipe connected to the vacuum box. The vacuum box has a through hole on the side facing the electrode laser cutting anti-wrinkle roller. The belt has multiple adsorption through holes. A baffle is disposed between the belt and the vacuum box and the baffle is disposed opposite to the adsorption tank (101).

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