Lithium ion battery winding dust removal device

Abstract

The utility model discloses a lithium ion battery winding dust removal device which comprises at least one pair of guide rollers, at least one pair of dust removal devices and at least one pair of dust removal devices. The at least one pair of cleaning rollers can synchronously and reversely rotate and are oppositely arranged on the two surfaces of the pole piece, and the at least one pair of cleaning rollers and the at least one pair of guide rollers are arranged in parallel; and the dust suction device is arranged at the side parts of the cleaning roller and the pole piece and is used for sucking and collecting impurities on the surface of the pole piece swept by the cleaning roller. Metal filing and other impurities on the two opposite surfaces of the pole piece are swept through the cleaning roller, the swept impurities are sucked and collected through the dust suction device, the cleaning roller and the dust suction device are matched to thoroughly remove the metal filing and other impurities on the pole piece, the probability of short circuit, self-discharge and other problems of a manufactured lithium ion battery is reduced, and the manufacturing efficiency of the lithium ion battery is improved. Therefore, the quality and the safety of the lithium ion battery are improved.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a lithium-ion battery winding dust removal device. Background Art

[0002] Lithium-ion batteries boast advantages such as high energy density, high average output voltage, low self-discharge, no memory effect, and long cycle life. They are widely used in electronic devices, energy storage devices, and new energy vehicles. With the advancement of society and technology, consumers are increasingly demanding the performance of lithium-ion batteries, which in turn places increasing demands on lithium-ion battery manufacturing technology.

[0003] In the manufacturing process of lithium-ion batteries, the winding process is very critical. Impurities such as metal shavings generated by the positive and negative electrodes during the winding process are easily rolled into the battery cell, resulting in poor appearance of raised surfaces on the battery cell, self-discharge, short circuit and other defects, thus posing a safety hazard to the lithium-ion battery. The prior art discloses the use of a scraper to scrape impurities on the winding tape and transfer them to a waste collection box, and the impurities on the winding tape are picked up by a sticky wheel and then sucked away by a vacuum blower, so as to prevent impurities from accumulating on the winding tape through the cooperation of the scraper and the sticky wheel, thereby ensuring the safety of the manufactured lithium-ion battery. However, the dust removal device that cooperates with the scraper and the sticky wheel can only remove impurities on the winding tape, and cannot completely remove impurities on the positive and negative electrodes, so that the manufactured lithium-ion battery still has certain safety hazards. Utility Model Content

[0004] In order to solve the above-mentioned defects in the prior art, the purpose of this application is to provide a lithium-ion battery winding dust removal device to thoroughly remove impurities such as metal chips on the electrode sheets, reduce the probability of short circuit, self-discharge and other problems in the manufactured lithium-ion batteries, and thus improve the quality and safety of lithium-ion batteries.

[0005] The technical solutions provided according to the purpose of this application are as follows:

[0006] A lithium-ion battery winding dust removal device, comprising:

[0007] At least one pair of guide rollers, the pair of guide rollers are arranged opposite to each other and can rotate synchronously in opposite directions to transport the pole piece;

[0008] At least one pair of cleaning rollers, the pair of cleaning rollers can rotate synchronously in opposite directions and are relatively arranged on two surfaces of the pole piece, and the at least one pair of cleaning rollers and the at least one pair of guide rollers are arranged in parallel;

[0009] The dust suction device is arranged on the side of the cleaning roller and the pole piece, and is used to suck and collect impurities on the surface of the pole piece swept up by the cleaning roller.

[0010] Furthermore, the cleaning roller includes a roller body and a plurality of roller brushes, wherein the plurality of roller brushes are arranged at intervals on the outer side wall of the roller body and extend along the radial direction of the roller body.

[0011] Furthermore, the dust suction device includes a dust box, an exhaust pipe, a dust hood and an exhaust fan. The exhaust fan is arranged in the dust box to provide suction force. The dust box is connected to the dust hood through the exhaust pipe. The dust hood is arranged on the side of the cleaning roller and the pole piece, and the cleaning roller sweeps up impurities toward the dust hood.

[0012] Furthermore, a storage net is provided in the dust box, and the storage net is laid in the dust box to carry the sucked impurities.

[0013] Furthermore, the storage net is a drawer-type structure, and the storage net can be pulled out or pushed in to be detachably connected to the dust box.

[0014] Furthermore, the dust hood is provided with a guide plate, which is arranged on a side of the dust hood close to the pole piece and abuts against the surface of the pole piece.

[0015] Furthermore, the guide plate is connected to the dust collection hood via an elastic member.

[0016] Furthermore, one end of the cleaning roller is coaxially connected to a transmission gear, and the transmission gears corresponding to a pair of cleaning rollers are meshed, and one of the transmission gears is coaxially connected to a pulley, and the pulley is driven to rotate by a driving motor.

[0017] Furthermore, the guide roller and the cleaning roller are both mounted on the mounting frame, and the distance between the pair of guide rollers and the distance between the pair of cleaning rollers are adjustable.

[0018] Furthermore, the guide roller and the cleaning roller are both mounted on the mounting frame through a sleeve, and the sleeve can be moved to move a pair of guide rollers closer to or farther from each other and a pair of cleaning rollers closer to or farther from each other, and the sleeve is fixed to the mounting frame through a limiting ring.

[0019] The lithium-ion battery winding dust removal device provided in this application has the following technical effects:

[0020] The cleaning roller sweeps up metal shavings and other impurities on the two opposite surfaces of the electrode, and the dust suction device sucks and collects the swept impurities. The cleaning roller and the dust suction device cooperate to thoroughly remove metal shavings and other impurities on the electrode, reducing the probability of short circuit, self-discharge and other problems in the manufactured lithium-ion batteries, thereby improving the quality and safety of the lithium-ion batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the lithium-ion battery winding dust removal device of the present application;

[0022] Figure 2 This is a schematic diagram of the structure of the lithium-ion battery winding dust removal device without the driving device of the present application;

[0023] Figure 3 This is an axial cross-sectional view of the cleaning roller of the present application.

[0024] Reference numerals:

[0025] 1. Guide roller; 2. Pole piece; 3. Cleaning roller; 31. Roller body; 32. Roller brush; 4. Dust collection device; 41. Dust collection box; 42. Exhaust pipe; 43. Dust hood; 431. Guide plate; 432. Elastic member; 44. Exhaust fan; 45. Storage net; 5. Driving device; 51. Transmission gear; 52. Pulley; 53. Driving motor; 54. Belt; 6. Mounting frame; 61. Sleeve; 62. Limiting ring. DETAILED DESCRIPTION

[0026] For better understanding and implementation, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0027] In the description of this application, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting this application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0029] See Figure 2 The present application discloses a lithium-ion battery winding dust removal device, comprising at least one pair of guide rollers 1, at least one pair of cleaning rollers 3, and a dust suction device 4. The pair of guide rollers 1 are arranged opposite each other and can rotate synchronously in opposite directions to convey the electrode sheet 2. The pair of cleaning rollers 3 can rotate synchronously in opposite directions and are arranged opposite each other on the two surfaces of the electrode sheet 2. The at least one pair of cleaning rollers 3 and the at least one pair of guide rollers 1 are arranged in parallel. The dust suction device 4 is arranged on the sides of the cleaning rollers 3 and the electrode sheet 2 and is used to absorb impurities on the surface of the electrode sheet 2 swept up by the cleaning rollers 3.

[0030] Specifically, the spacing between a pair of guide rollers 1 is the thickness of the electrode 2. The guide rollers 1 are arranged in contact with the electrode 2 so that the electrode 2 is guided by the rotation of the guide rollers 1 to prevent the electrode 2 from being deflected in its conveying direction. Depending on the length of the conveying path, the guide rollers 1 can be provided as a pair or as two or more pairs spaced apart and arranged in parallel. This application uses a pair of guide rollers 1 as an example for explanation.

[0031] The spacing between the pair of cleaning rollers 3 is the thickness of the electrode 2. The cleaning rollers 3 are arranged in contact with the electrode 2 so that the cleaning rollers 3 rotate to sweep up impurities such as metal chips on the opposite surfaces of the electrode 2 and sweep the impurities toward the dust collection device 4, which then collects the impurities and completes the removal of impurities from the surface of the electrode 2. Depending on the amount of impurities on the surface of the electrode 2 and the length of the conveying path, the cleaning rollers 3 can be provided as a pair or two or more pairs can be provided in parallel at intervals. This application uses a pair of cleaning rollers 3 as an example for explanation.

[0032] It should be noted that when the cleaning roller 3 contacts the electrode 2 to clean impurities on the electrode 2 , the pressure of the cleaning roller 3 on the electrode 2 needs to be strictly controlled to ensure that the impurities can be swept away without damaging the electrode 2 .

[0033] Therefore, the present application sweeps up metal chips and other impurities on the two opposite surfaces of the electrode 2 through the cleaning roller 3, and collects the swept impurities through the dust suction device 4. The cleaning roller 3 and the dust suction device 4 cooperate to thoroughly remove metal chips and other impurities on the electrode 2, reducing the probability of short circuit, self-discharge and other problems in the manufactured lithium-ion batteries, thereby improving the quality and safety of the lithium-ion batteries.

[0034] See Figure 2 and Figure 3 The cleaning roller 3 includes a roller body 31 and a plurality of roller brushes 32. The roller brushes 32 are spaced apart on the outer sidewall of the roller body 31 and extend radially in the direction of the roller body 31. Preferably, the roller brushes 32 are evenly spaced apart on the outer sidewall of the roller body 31 to improve the efficiency of sweeping up impurities. As the cleaning roller 3 rotates, the roller brushes 32 contact and sweep up impurities on the surface of the electrode 2. The density of the roller brushes 32 can be adjusted based on the distribution of impurities to ensure the cleanliness of impurity removal.

[0035] The rotation of the cleaning roller 3 is achieved by driving the driving device 5. Figure 1 A transmission gear 51 is coaxially connected to one end of the cleaning roller 3. The transmission gears 51 of the pair of cleaning rollers 3 are meshed. One of the transmission gears 51 is coaxially connected to a pulley 52, which is driven to rotate by a drive motor 53. The drive motor 53 drives the pulley 52 to rotate, thereby driving the coaxially connected transmission gear 51 and the meshed transmission gear 51 to rotate, thereby achieving synchronous counter-rotation of the pair of cleaning rollers 3.

[0036] by Figure 1 For example, two pulleys 52 are provided, and the two pulleys 52 are connected to each other via a belt 54. One pulley 52 is coaxially connected to the output shaft of the drive motor 53, and the other pulley 52 is coaxially connected to one of the transmission gears 51. The drive motor 53 drives one of the pulleys 52 to rotate, thereby driving the other pulley 52 and a transmission gear 51 coaxially connected thereto to rotate synchronously, thereby driving the other meshing transmission gear 51 to rotate synchronously in the opposite direction, thereby achieving synchronous counter-rotation of the pair of cleaning rollers 3.

[0037] In the present application, the guide roller 1 and the cleaning roller 3 are both mounted on a mounting frame 6, and the spacing between the pair of guide rollers 1 and the spacing between the pair of cleaning rollers 3 are adjustable. In this way, the spacing between the pair of guide rollers 1 and the spacing between the pair of cleaning rollers 3 can be adjusted according to the thickness of the pole piece 2.

[0038] Furthermore, the guide roller 1 and the cleaning roller 3 are both mounted on the mounting frame 6 via a sleeve 61. The sleeve 61 is movable to allow the pair of guide rollers 1 to move closer to or further away from each other, and the pair of cleaning rollers 3 to move closer to or further away from each other. The sleeve 61 is fixed to the mounting frame 6 via a limiting ring 62. Both the pair of guide rollers 1 and the pair of cleaning rollers 3 can be mounted on the mounting frame 6 via the sleeve 61, or a guide roller 1 and a cleaning roller 3 located on the same side of the pole piece 2 can be mounted on the mounting frame 6 via the sleeve 61, so that the spacing between the pair of guide rollers 1 and the spacing between the pair of cleaning rollers 3 are adapted to the thickness of the pole piece 2.

[0039] This application uses the horizontal transport of pole pieces 2 as an example. The mounting frame 6 is equipped with a vertical mounting rod, a pair of guide rollers 1 disposed vertically, and a pair of cleaning rollers 3 disposed vertically. The guide rollers 1 and cleaning rollers 3 located on the same side of the pole piece 2 are mounted on the mounting rod via a common mounting plate. At least one mounting plate is mounted on the mounting rod via a sleeve 61. The sleeve 61 is mounted on the outside of the mounting rod and can slide vertically back and forth along the mounting rod to adjust the spacing between the pair of guide rollers 1 and the spacing between the pair of cleaning rollers 3. After adjusting the spacing between the pair of guide rollers 1 and the pair of cleaning rollers 3, the sleeve 61 is secured to the mounting rod via a retaining ring 62.

[0040] For dust extraction device 4, see Figure 1 and Figure 2, which includes a dust box 41, an exhaust pipe 42, a dust hood 43 and an exhaust fan 44. The exhaust fan 44 is installed in the dust box 41 to provide suction force. The dust box 41 is connected to the dust hood 43 through the exhaust pipe 42. The dust hood 43 is installed on the side of the cleaning roller 3 and the electrode 2, and the cleaning roller 3 sweeps up impurities toward the dust hood 43. When removing impurities from the surface of the electrode 2, the exhaust fan 44 is started to provide suction force, so that the impurities swept up by the cleaning roller 3 pass through the dust hood 43 and the exhaust pipe 42 and enter the dust box 41 for removal and collection.

[0041] It is worth noting that each cleaning roller 3 corresponds to a set of exhaust pipes 42 and dust hoods 43 to ensure that impurities swept up by each cleaning roller 3 are promptly sucked and collected. In addition, the dust collection port of the dust hood 43 needs to be aligned with the contact point between the cleaning roller 3 and the electrode 2 and located on the side of the moving direction of the impurities being swept up to ensure that the impurities can enter the dust hood 43.

[0042] Furthermore, the dust hood 43 is provided with a guide plate 431, which is provided on the side of the dust hood 43 close to the pole piece 2 and abuts against the surface of the pole piece 2. The guide plate 431 blocks the gap between the dust hood 43 and the pole piece 2, so that impurities swept up by the cleaning roller 3 can be guided by the guide plate 431 and the suction force of the exhaust fan 44 to quickly and centrally enter the dust hood 43, thereby preventing the swept impurities from falling back onto the surface of the pole piece 2, thereby improving the efficiency of impurity removal and cleanliness.

[0043] It is worth noting that the guide plate 431 needs to be against the surface of the pole piece 2 to ensure that there is no gap between the guide plate 431 and the pole piece 2 to prevent impurities from falling back, and it is also necessary to prevent the guide plate 431 from damaging the pole piece 2.

[0044] Furthermore, the guide plate 431 is connected to the dust cover 43 via an elastic member 432. The elastic member 432 can be a spring sheet or other structure, and the position of the guide plate 431 against the pole piece 2 can be adjusted by the elastic member 432 to adapt to pole pieces 2 of different thicknesses.

[0045] Furthermore, a collection net 45 is provided within the dust box 41 to collect the collected impurities. The net 45 is laid horizontally within the dust box 41, with its circumferential edges connected to the inner wall of the dust box 41 to ensure that the collected impurities are fully collected. Once the dust box 41 is full of impurities, the dust box 41 can be opened to transfer the collected impurities.

[0046] Of course, preferably, the storage net 45 is detachably connected to the dust box 41 , so that the impurities can be transferred by removing the storage net 45 .

[0047] Furthermore, the storage net 45 may be provided with a sidewall structure to carry more impurities. In the present application, the storage net 45 is a drawer-type structure, and the storage net 45 can be pulled out or pushed in to be detachably connected to the dust box 41. After the storage net 45 is full of impurities, the storage net 45 can be pulled out of the dust box 41 to transfer the impurities, thereby achieving regular cleaning of impurities.

[0048] It is worth noting that the mesh of the storage net 45 should be smaller than the impurities to prevent the impurities from falling into the dust box 41 through the storage net 45, making it inconvenient to clean.

[0049] The technical means disclosed in the present application are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present application, and such improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A lithium-ion battery winding dust removal device, characterized in that: include: At least one pair of guide rollers (1), the pair of guide rollers (1) being arranged opposite to each other and capable of synchronously rotating in opposite directions to convey the pole piece (2); At least one pair of cleaning rollers (3), the pair of cleaning rollers (3) can rotate synchronously in opposite directions and are relatively arranged on two surfaces of the pole piece (2), and the at least one pair of cleaning rollers (3) and the at least one pair of guide rollers (1) are arranged in parallel; A dust suction device (4) is provided on the sides of the cleaning roller (3) and the pole piece (2), and the dust suction device (4) is used to suck and collect impurities on the surface of the pole piece (2) swept up by the cleaning roller (3).

2. The lithium-ion battery winding dust removal device according to claim 1, characterized in that: The cleaning roller (3) comprises a roller body (31) and a plurality of roller brushes (32), wherein the plurality of roller brushes (32) are arranged at intervals on the outer side wall of the roller body (31) and extend along the radial direction of the roller body (31).

3. The lithium-ion battery winding dust removal device according to claim 1 or 2, characterized in that: The dust collecting device (4) comprises a dust collecting box (41), an exhaust pipe (42), a dust collecting hood (43) and an exhaust fan (44). The exhaust fan (44) is arranged in the dust collecting box (41) to provide a suction force. The dust collecting box (41) is connected to the dust collecting hood (43) through the exhaust pipe (42). The dust collecting hood (43) is arranged on the side of the cleaning roller (3) and the pole piece (2), and the cleaning roller (3) sweeps up impurities toward the dust collecting hood (43).

4. The lithium-ion battery winding dust removal device according to claim 3, characterized in that: A receiving net (45) is provided in the dust collecting box (41), and the receiving net (45) is laid in the dust collecting box (41) to carry the sucked impurities.

5. The lithium-ion battery winding dust removal device according to claim 4, characterized in that: The storage net (45) is a drawer-type structure, and the storage net (45) can be pulled out or pushed in to be detachably connected to the dust box (41).

6. The lithium-ion battery winding dust removal device according to claim 3, characterized in that: The dust hood (43) is provided with a guide plate (431), and the guide plate (431) is provided on a side of the dust hood (43) close to the pole piece (2) and abuts against the surface of the pole piece (2).

7. The lithium-ion battery winding dust removal device according to claim 6, characterized in that: The guide plate (431) is connected to the dust collecting cover (43) via an elastic member (432).

8. The lithium-ion battery winding dust removal device according to claim 1 or 2, characterized in that: One end of the cleaning roller (3) is coaxially connected to a transmission gear (51), and a pair of the transmission gears (51) corresponding to the cleaning rollers (3) are meshed, and one of the transmission gears (51) is coaxially connected to a pulley (52), and the pulley (52) is driven to rotate by a driving motor (53).

9. The lithium-ion battery winding dust removal device according to claim 1 or 2, characterized in that: The guide roller (1) and the cleaning roller (3) are both mounted on a mounting frame (6), and the spacing between a pair of guide rollers (1) and the spacing between a pair of cleaning rollers (3) are adjustable.

10. The lithium-ion battery winding dust removal device according to claim 9, characterized in that: The guide roller (1) and the cleaning roller (3) are both mounted on the mounting frame (6) via a sleeve (61); the sleeve (61) is movable so that a pair of guide rollers (1) move closer to or farther from each other, and a pair of cleaning rollers (3) move closer to or farther from each other; the sleeve (61) is fixed to the mounting frame (6) via a limiting ring (62).

Images