Lithium ion battery ultrasonic welding tab cleaning device

Abstract

The utility model belongs to the technical field of soft package battery manufacturing, and discloses a lithium ion battery ultrasonic welding tab cleaning device which comprises two hollow bearings which are parallel to each other and are rotatably arranged, and an upper roller and a lower roller which are correspondingly arranged are respectively installed on the two hollow bearings. A cleaning gap for cleaning the tab from the two sides of the tab when the tab is welded is formed between the upper roller and the lower roller; the upper rolling wheel and the lower rolling wheel are each provided with a plurality of external air holes communicating with the outer portions of the upper rolling wheel and the lower rolling wheel and the interiors of the corresponding hollow bearings, the two hollow bearings are each provided with internal air holes communicating with the external air holes, and the two hollow bearings are both connected with an air extractor for extracting internal air of the two hollow bearings. According to the utility model, negative pressure can be formed on the upper roller and the lower roller, and then metal filings on the tabs can be adsorbed by utilizing the external air holes on the upper roller and the lower roller, so that the metal filings are efficiently and thoroughly cleaned, and the metal filings generated by welding are prevented from being introduced into the battery.

Description

Technical Field

[0001] The utility model belongs to the technical field of soft-pack battery manufacturing, and in particular relates to a lithium-ion battery ultrasonic welding tab cleaning device. Background Art

[0002] At present, lithium batteries are increasingly used in various digital devices such as notebooks, digital cameras, and digital video cameras. In addition, they also have broad prospects in automobiles, mobile base stations, energy storage power stations, etc. In this case, the use of batteries is no longer a single one like in mobile phones, but more in the form of battery packs in series or parallel. The capacity and life of a battery pack are not only related to each individual battery, but also to the consistency between each battery. Poor consistency will greatly drag down the performance of the battery pack. The consistency of self-discharge is an important part of the influencing factors. Batteries with inconsistent self-discharge will have a large difference in SOC after being stored for a period of time, which will greatly affect its capacity and safety. Research on it will help improve the overall level of our battery packs, obtain a longer life, and reduce the defective rate of products. Self-discharge is an important topic to be tackled in the lithium battery industry. It has not been completely solved. It can only be reduced by strengthening the control of related factors. Metal shavings are easily generated during the ultrasonic welding of lithium-ion batteries, so dust removal after welding is extremely important. At present, the main process mainly includes tab pre-welding, tab cutting, tab main welding, gluing, brush cleaning and tab shaping. However, when using a brush to clean the metal chips from the tab, the metal chips are easily adhered to the brush due to the material of the brush. During subsequent operation of the brush, the metal chips are stuck to the battery, thereby introducing metal chips into the battery, posing a great safety risk. Utility Model Content

[0003] The utility model aims to provide a lithium ion battery ultrasonic welding tab cleaning device to solve the above problems existing in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A lithium-ion battery ultrasonic welding tab cleaning device comprises two hollow bearings which are parallel to each other and rotatably arranged, the two hollow bearings are respectively mounted with corresponding upper rollers and lower rollers, a cleaning gap is arranged between the upper rollers and the lower rollers for cleaning the tabs from both sides when welding the tabs; the upper rollers and the lower rollers are both provided with a plurality of external air holes which are connected to the outside of each and the inside of the corresponding hollow bearings, the two hollow bearings are both provided with internal air holes which are connected to the external air holes, and the two hollow bearings are both connected with an exhaust device which is connected to extract the gas inside each.

[0006] As a preferred technical solution in the utility model, two ends of the hollow bearing are rotatably connected to the left fixed plate and the right fixed plate respectively.

[0007] As a preferred technical solution in the utility model, one end of the hollow bearing is rotatably connected to the left fixed plate through a first bearing, and the other end of the hollow bearing is rotatably connected to the right fixed plate through a second bearing.

[0008] As a preferred technical solution in the utility model, a negative pressure dust suction pipe which is rotatably connected to the hollow bearing and coaxially connected is installed on the left fixed plate, and one end of the negative pressure dust suction pipe away from the hollow bearing is connected to the exhaust device.

[0009] As a preferred technical solution in the present utility model, the negative pressure dust suction pipe is rotatably connected to the hollow bearing through a third bearing.

[0010] As a preferred technical solution in the utility model, the other ends of the two hollow bearings are connected to synchronous wheels, and the two synchronous wheels are externally connected to the motor through a synchronous belt.

[0011] As a preferred technical solution in the utility model, the other ends of the two hollow bearings are both sealed.

[0012] As a preferred technical solution in the present utility model, the air extraction device is a vacuum cleaner.

[0013] As a preferred technical solution in the utility model, the upper roller and the lower roller are both made of rubber material.

[0014] As a preferred technical solution in the utility model, the diameters of the upper roller and the lower roller are both 25mm±1mm, and the lengths are both 66mm±1mm; the aperture of the external air holes is 3mm±0.05mm, and the spacing between adjacent external air holes on the upper roller or the lower roller is 3mm±0.05mm.

[0015] Beneficial effect: When welding the pole ear, the utility model sets the pole ear between the upper roller and the lower roller, and a negative pressure is formed on both the upper roller and the lower roller through the exhaust device, and then the external air holes on the upper roller and the lower roller can be used to absorb the metal chips on the pole ear, thereby efficiently and thoroughly cleaning the metal chips and avoiding the introduction of metal chips generated by welding inside the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 The utility model is a schematic diagram of the installation of the upper roller on the hollow bearing.

[0018] In the figure: 1-upper roller; 2-lower roller; 3-hollow bearing; 4-negative pressure suction pipe; 5-left fixed plate; 6-right fixed plate; 7-synchronous wheel. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model.

[0020] Example:

[0021] like Figure 1 and Figure 2 As shown, this embodiment provides a lithium-ion battery ultrasonic welding tab cleaning device, including two hollow bearings 3 that are parallel to each other and rotatably arranged, and the two hollow bearings 3 are respectively mounted with corresponding upper rollers 1 and lower rollers 2. A cleaning gap is provided between the upper roller 1 and the lower roller 2 for cleaning the tab from both sides when welding the tab. When welding the tab, the tab passes between the upper roller 1 and the lower roller 2. When it reaches between the upper roller 1 and the lower roller 2, the battery cell stops at this station, and the upper roller 1 and the lower roller 2 rotate and absorb the tab metal chips for cleaning. After cleaning, the battery cell continues to rotate with the turntable and enters the next process.

[0022] The upper roller 1 and the lower roller 2 are both provided with a plurality of external air holes connected to their respective exteriors and the interiors of the corresponding hollow bearings 3. The two hollow bearings 3 are both provided with internal air holes connected to the external air holes. The two hollow bearings 3 are both connected with an exhaust device for extracting the internal gas of each. When working, the exhaust device is turned on to extract the internal gas of the hollow bearing 3, and then a negative pressure is formed at the external air holes. The metal chips on the pole ear are absorbed by the negative pressure, so as to avoid the introduction of metal chips generated by welding into the battery.

[0023] Preferably, both ends of the upper roller 1 and the lower roller 2 can be rotatably connected to the corresponding hollow bearings 3 through bearings, so that an air circulation cavity can be formed between the upper roller 1 and the hollow bearing 3 between the two bearings, and between the lower roller 2 and the hollow bearing 3 between the two bearings, which can also meet the situation where negative pressure is formed on the surfaces of the upper roller 1 and the lower roller 2.

[0024] When welding the pole ear, the utility model sets the pole ear between the upper roller 1 and the lower roller 2, and a negative pressure is formed on both the upper roller 1 and the lower roller 2 through the air extraction device, and then the metal chips on the pole ear can be adsorbed by the external air holes on the upper roller 1 and the lower roller 2, so as to efficiently and thoroughly clean the metal chips and avoid the introduction of metal chips generated by welding inside the battery.

[0025] As a preferred implementation scheme in this embodiment, it needs to be further explained that the two ends of the hollow bearing 3 are respectively rotatably connected to the left fixed plate 5 and the right fixed plate 6, and the stability of the hollow bearing 3 is ensured by the left fixed plate 5 and the right fixed plate 6, thereby ensuring the stability of the upper roller 1 and the lower roller 2.

[0026] As a preferred implementation scheme in this embodiment, it needs to be further explained that one end of the hollow bearing 3 is rotatably connected to the left fixed plate 5 through a first bearing, and the other end of the hollow bearing 3 is rotatably connected to the right fixed plate 6 through a second bearing, which ensures the stability of the hollow bearing 3 while also ensuring that the hollow bearing 3 can drive the upper roller 1 or the lower roller 2 to rotate flexibly.

[0027] As a preferred implementation scheme in this embodiment, it needs to be further explained that a negative pressure dust suction pipe 4 is installed on the left fixed plate 5, which is rotatably connected to the hollow bearing 3 and coaxially connected. Therefore, when the hollow bearing 3 rotates, the stability of the negative pressure dust suction pipe 4 will not be affected. The end of the negative pressure dust suction pipe 4 away from the hollow bearing 3 is connected to the exhaust device, which is convenient for exhausting air, thereby realizing negative pressure adsorption on the surfaces of the upper roller 1 and the lower roller 2.

[0028] As a preferred implementation scheme in this embodiment, it needs to be further explained that the negative pressure dust suction tube 4 is rotatably connected to the hollow bearing 3 through a third bearing to ensure the stability between the two. At the same time, the stability of the negative pressure dust suction tube 4 will not be affected when the hollow bearing 3 rotates.

[0029] As a preferred implementation scheme in this embodiment, it needs to be further explained that the other ends of the two hollow bearings 3 are connected to synchronous wheels 7, and the two synchronous wheels 7 are connected to the motor through synchronous belts. The structure is simple and practical. When welding the pole lugs, the two hollow bearings 3 can be effectively and stably driven to rotate, so that the upper roller 1 and the lower roller 2 can rotate to adsorb the metal chips on the surface of the pole lug, and the adsorption effect is better. It should be noted that in practice, the rotation speed of the two synchronous wheels 7 is preferably 800RPM-1000RPM.

[0030] As a preferred implementation scheme in this embodiment, it needs to be further explained that the other ends of the two hollow bearings 3 are sealed, so that the flow of air inside the hollow bearings 3 is carried out from the external air holes and the internal air holes, thereby making it easier to form negative pressure on the surfaces of the upper roller 1 and the lower roller 2, and the adsorption effect is better.

[0031] As a preferred implementation scheme in this embodiment, it needs to be further explained that the air extraction device is a vacuum cleaner.

[0032] As a preferred implementation scheme in this embodiment, it needs to be further explained that the upper roller 1 and the lower roller 2 are both made of rubber material. While the upper roller 1 and the lower roller 2 adsorb metal chips, they can also play a certain bonding role, thereby achieving a better chip removal effect.

[0033] As a preferred implementation scheme in this embodiment, it needs to be further explained that the diameters of the upper roller 1 and the lower roller 2 are both 25mm±1mm, and the lengths are both 66mm±1mm; the aperture of the external air holes is 3mm±0.05mm, and the spacing between adjacent external air holes on the upper roller 1 or the lower roller 2 is 3mm±0.05mm, thereby ensuring sufficient negative pressure to absorb metal chips on the surface.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lithium-ion battery ultrasonic welding tab cleaning device, characterized in that: The invention comprises two hollow bearings (3) which are arranged parallel to each other and are rotatably arranged. The two hollow bearings (3) are respectively provided with an upper roller (1) and a lower roller (2) which are arranged correspondingly. A cleaning gap is provided between the upper roller (1) and the lower roller (2) for cleaning the pole lug from both sides of the pole lug when welding the pole lug. The upper roller (1) and the lower roller (2) are both provided with a plurality of external air holes which are connected to the outside of each and the inside of the corresponding hollow bearing (3). The two hollow bearings (3) are both provided with internal air holes which are connected to the external air holes. The two hollow bearings (3) are both connected with an exhaust device which is used to extract the gas inside each.

2. A lithium-ion battery ultrasonic welding tab cleaning device according to claim 1, characterized in that: The two ends of the hollow bearing (3) are rotatably connected to the left fixing plate (5) and the right fixing plate (6) respectively.

3. A lithium-ion battery ultrasonic welding tab cleaning device according to claim 2, characterized in that: One end of the hollow bearing (3) is rotatably connected to the left fixing plate (5) via a first bearing, and the other end of the hollow bearing (3) is rotatably connected to the right fixing plate (6) via a second bearing.

4. A lithium-ion battery ultrasonic welding tab cleaning device according to claim 3, characterized in that: A negative pressure dust suction pipe (4) is mounted on the left fixed plate (5) and is rotatably connected to and coaxially communicated with the hollow bearing (3). The end of the negative pressure dust suction pipe (4) away from the hollow bearing (3) is connected to the exhaust device.

5. A lithium-ion battery ultrasonic welding tab cleaning device according to claim 4, characterized in that: The negative pressure dust suction pipe (4) is rotatably connected to the hollow bearing (3) via a third bearing.

6. A lithium-ion battery ultrasonic welding tab cleaning device according to claim 3, characterized in that: The other ends of the two hollow bearings (3) are connected to synchronous wheels (7), and the two synchronous wheels (7) are externally connected to the motor via a synchronous belt.

7. A lithium-ion battery ultrasonic welding tab cleaning device according to claim 6, characterized in that: The other ends of the two hollow bearings (3) are both sealed.

8. A lithium-ion battery ultrasonic welding tab cleaning device according to any one of claims 1 to 7, characterized in that: The air extraction device is a vacuum cleaner.

9. A lithium-ion battery ultrasonic welding tab cleaning device according to any one of claims 1 to 7, characterized in that: The upper roller (1) and the lower roller (2) are both made of rubber material.

10. A lithium-ion battery ultrasonic welding tab cleaning device according to any one of claims 1 to 7, characterized in that: The diameters of the upper roller (1) and the lower roller (2) are both 25 mm ± 1 mm, and the lengths are both 66 mm ± 1 mm; the apertures of the external air holes are 3 mm ± 0.05 mm, and the spacing between adjacent external air holes on the upper roller (1) or the lower roller (2) is 3 mm ± 0.05 mm.

Images