Battery pole piece dust removal feeding device and battery pole piece dust removal system

Abstract

The present invention provides a battery pole piece dust removal feeding device and a battery pole piece dust removal system, comprising a cylindrical roller and a plurality of rolling elements. The battery pole piece dust removal feeding device and the battery pole piece dust removal system provided by the present invention, by arranging a rolling element on the roller, utilizing the supporting function of the rolling element to make the pole piece detach from the peripheral side surface of the cylindrical roller, adopting rolling friction instead of sliding friction, reducing the factors causing friction of the pole piece as much as possible, thereby reducing the possibility of forming a micro short circuit on the pole piece, and by arranging an air vent, impurities on the pole piece can be removed by adsorption, the design of the inner ring and the outer ring can ensure the stability of the rolling element on the cylindrical roller and the adsorption effect of the air vent, and at the same time, the air vent can produce a certain adsorption effect on the pole piece to prevent the pole piece from falling off the cylindrical roller, and the two cylindrical rollers are staggered, so that the pole piece between the two cylindrical rollers can produce a certain tension, thereby increasing the dust removal effect.

Description

Technical Field

[0001] The invention relates to the field of battery auxiliary equipment, in particular to a battery pole piece dust removal and feeding device and a battery pole piece dust removal system. Background Art

[0002] With the continuous development of electronic technology, the performance requirements and quantity demand for lithium-ion batteries are getting higher and higher. In the process of lithium-ion battery manufacturing, dust particles will have a great impact on the performance of the subsequent finished battery cells. The dust-free workshop can reduce the dust particle pollution in the manufacturing workshop, but it cannot remove the floating dust on the pole piece or the powder particles generated during the winding process. The existing technology uses a tray to carry the pole piece, and blows or uses a brush with exhaust to remove the surface powder and floating dust during the winding process. This process will cause a micro short circuit inside the formed lithium-ion battery due to the friction between the pole pieces or between the pole piece and the tray, which will cause the problem of excessive battery voltage drop rate. . Summary of the invention

[0003] In order to solve the above technical problems, a battery pole piece dust removal and feeding device and a battery pole piece dust removal system are provided to prevent the pole pieces from generating friction.

[0004] A battery pole piece dust removal and feeding device comprises a cylindrical roller and a plurality of rolling elements, all of the rolling elements are evenly distributed on the circumferential side surface of the cylindrical roller, and each of the rolling elements can roll freely along its own axis, and a plurality of air vents for absorbing impurities are also provided on the circumferential side surface of the cylindrical roller, all of the air vents are connected to an exhaust mechanism, and impurities on the battery pole piece can enter the exhaust mechanism through the air vents.

[0005] A plurality of ventilation holes are evenly distributed around each rolling element.

[0006] The cylindrical roller includes an inner ring and an outer ring, the outer ring is sleeved on the outer circumference of the inner ring, and a wind gap is formed between the inner ring and the outer ring, all the air holes are arranged on the outer ring, and all the air holes are connected to the exhaust mechanism through the wind gap.

[0007] The inner ring and the outer ring are coaxial.

[0008] The inner ring is provided with inner limiting holes corresponding to the rolling elements one by one, and the outer ring is provided with outer limiting holes corresponding to the inner limiting holes one by one. The rolling elements are arranged in the corresponding inner limiting holes and the outer limiting holes, and part of the rolling elements protrudes from the circumferential side surface of the cylindrical roller through the outer limiting holes.

[0009] The rolling element is a ball, and the ball can rotate freely along its own center on the cylindrical roller; or the rolling element is a small cylindrical roller, and the axis of the small cylindrical roller is parallel to the axis of the cylindrical roller.

[0010] The maximum distance between the outer circumference of the rolling element and the outer circumference of the cylindrical roller is in the range of 1-5 mm.

[0011] A battery pole piece dust removal system comprises at least two of the above-mentioned battery pole piece dust removal and feeding devices, wherein the axes of two adjacent cylindrical rollers are not in the same horizontal plane, and the battery pole piece passes through the two adjacent cylindrical rollers in an S shape in sequence.

[0012] The battery pole piece dust removal and feeding device and the battery pole piece dust removal system provided by the present invention arrange a rolling element on the roller, utilize the supporting effect of the rolling element to make the pole piece detach from the peripheral side surface of the cylindrical roller, adopt rolling friction instead of sliding friction, reduce the factors that generate friction on the pole piece as much as possible, and thus reduce the possibility of forming a micro short circuit on the pole piece, and by arranging air holes, impurities on the pole piece can be removed by adsorption, and the design of the inner ring and the outer ring can ensure the stability of the rolling element on the cylindrical roller and the adsorption effect of the air holes, and at the same time, the air holes can produce a certain adsorption effect on the pole piece to prevent the pole piece from falling off the cylindrical roller, and the two cylindrical rollers are staggered, which can cause a certain tension to be generated on the pole piece between the two cylindrical rollers, thereby increasing the dust removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of a battery pole piece dust removal and feeding device and a battery pole piece dust removal system provided by the present invention;

[0014] Figure 2 A cross-sectional view of a battery pole piece dust removal and feeding device and a cylindrical roller of a battery pole piece dust removal system provided by the present invention;

[0015] Figure 3 Another cross-sectional view of the battery pole piece dust removal and feeding device and the cylindrical roller of the battery pole piece dust removal system provided by the present invention;

[0016] Figure 4 A gas flow diagram of a battery pole piece dust removal and feeding device and a battery pole piece dust removal system provided by the present invention;

[0017] Figure 5 A schematic diagram of a battery pole piece dust removal feeding device and a battery pole piece dust removal system provided by the present invention;

[0018] In the figure:

[0019] 1. Cylindrical roller; 2. Rolling element; 3. Vent hole; 11. Inner ring; 12. Outer ring; 13. Inner limit hole; 14. Outer limit hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] like Figures 1 to 4 The battery pole piece dust removal and feeding device shown comprises a cylindrical roller 1 and a plurality of rolling elements 2, all of the rolling elements 2 are evenly distributed on the circumferential side surface of the cylindrical roller 1, and each of the rolling elements 2 can roll freely along its own axis, and a plurality of air vents 3 for absorbing impurities are also provided on the circumferential side surface of the cylindrical roller 1, and all of the air vents 3 are connected to an exhaust mechanism, and impurities on the battery pole piece can enter the exhaust mechanism through the air vents 3, and the pole piece moves on the circumferential side surface of the cylindrical roller 1 through the rolling elements 2, and the pole piece moves along a set direction under the rolling of the cylindrical roller 1, and the rolling of the rolling elements 2 can transform the friction mode between the pole piece and the cylindrical roller 1 from sliding friction to rolling friction, thereby reducing the friction area and friction force between the pole piece and the cylindrical roller 1, and effectively reducing the damage to the pole piece caused by friction, and by providing the air vents 3, the exhaust mechanism can be used to adsorb and remove impurities on the pole piece, thereby achieving the effect of dust removal on the pole piece.

[0022] A plurality of ventilation holes 3 are evenly distributed around each rolling element 2 .

[0023] Preferably, the cylindrical roller 1 has at least four rolling elements 2 on the same cross section to ensure that there are always rolling elements 2 to support the pole pieces during the rolling process of the cylindrical roller 1, preferably six rolling elements.

[0024] Preferably, each of the rolling elements 2 has at least four ventilation holes 3 around it. In particular, the four ventilation holes 3 are distributed in a circle around the rolling element 2, and the center of the circle is on the rolling element 2. When the fixed element is a ball, the line connecting the center of the circle and the center of the ball passes through the axis of the cylindrical roller 1.

[0025] The cylindrical roller 1 includes an inner ring 11 and an outer ring 12, the outer ring 12 is sleeved on the outer circumference of the inner ring 11, and a wind gap is formed between the inner ring 11 and the outer ring 12, all the air holes 3 are arranged on the outer ring 12, and all the air holes 3 are connected to the exhaust mechanism through the wind gap.

[0026] The inner ring 11 and the outer ring 12 are coaxial, that is, the cross section of the cylindrical roller 1 is two concentric circular ring structures.

[0027] The inner ring 11 is provided with inner limit holes 13 corresponding to the rolling elements 2 one by one, and the outer ring 12 is provided with outer limit holes 14 corresponding to the inner limit holes 13 one by one. The rolling elements 2 are arranged in the corresponding inner limit holes 13 and the outer limit holes 14, and part of the rolling elements 2 protrudes from the circumferential side of the cylindrical roller 1 through the outer limit holes 14.

[0028] The rolling element 2 is a ball, and the ball can rotate freely on the cylindrical roller 1 along its own center; or the rolling element 2 is a small cylindrical roller 1, and the axis of the small cylindrical roller is parallel to the axis of the cylindrical roller 1.

[0029] The diameters of the inner limiting hole 13 and the outer limiting hole 14 are both smaller than the diameter of the ball.

[0030] The rolling axis of the small cylindrical roller is located in the wind gap.

[0031] The maximum distance range from the outer circumference of the rolling element 2 to the outer circumference of the cylindrical roller 1 is 1-5mm. Within the range of 1-5mm, the adsorption effect of the air hole 3 can be maximized. When the range is less than 1mm, the air hole 3 cannot adsorb the surface of the pole piece around the air hole 3, and the adsorption force generated is too large to cause the pole piece to contact the cylindrical roller 1. When the range is greater than 5mm, the adsorption effect of the air hole 3 is reduced.

[0032] like Figure 5 A battery pole piece dust removal system shown includes at least two of the above-mentioned battery pole piece dust removal and feeding devices, the axes of the two adjacent cylindrical rollers 1 are not in the same horizontal plane, and the battery pole piece is S-shaped and passes through the two adjacent cylindrical rollers 1 in sequence, that is, the two cylindrical rollers 1 are placed in an up and down staggered manner, and the pole piece passes through the staggered space between the two cylindrical rollers 1, thereby generating a certain tension, enhancing the adsorption effect, and the two cylindrical rollers 1 can perform dust removal on both sides of the pole piece.

[0033] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A battery pole piece dust removal and feeding device, characterized in that: The invention comprises a cylindrical roller (1) and a plurality of rolling elements (2), all of the rolling elements (2) are distributed on the circumferential side surface of the cylindrical roller (1), and each of the rolling elements (2) can roll freely by itself. The circumferential side surface of the cylindrical roller (1) is also provided with a plurality of vent holes (3) for absorbing impurities, all of the vent holes (3) are connected to an exhaust mechanism, and impurities on the battery electrode can enter the exhaust mechanism through the vent holes (3); the cylindrical roller (1) comprises an inner ring (11) and an outer ring (12), the outer ring (12) is sleeved on the outer circumferential side of the inner ring (11), and a wind gap is formed between the inner ring (11) and the outer ring (12), all of the vent holes (3) are provided on the outer ring (12), and all of the vent holes (3) are connected to the exhaust mechanism through the wind gap.

2. The battery pole piece dust removal and feeding device according to claim 1, characterized in that: A plurality of ventilation holes (3) are evenly distributed around each rolling element (2).

3. The battery pole piece dust removal and feeding device according to claim 1, characterized in that: The inner ring (11) and the outer ring (12) are coaxial.

4. The battery pole piece dust removal and feeding device according to claim 1, characterized in that: The inner ring (11) is provided with inner limiting holes (13) corresponding one-to-one to the rolling elements (2), the outer ring (12) is provided with outer limiting holes (14) corresponding one-to-one to the inner limiting holes (13), the rolling elements (2) are arranged in the corresponding inner limiting holes (13) and the outer limiting holes (14), and a part of the rolling elements (2) protrudes from the peripheral side surface of the cylindrical roller (1) through the outer limiting holes (14).

5. The battery pole piece dust removal and feeding device according to claim 1 or 4, characterized in that: The rolling element (2) is a ball, and the ball can freely rotate along its own spherical center on the cylindrical roller (1).

6. The battery pole piece dust removal and feeding device according to claim 1 or 4, characterized in that: The rolling element (2) is a small cylindrical roller, and the axis of the small cylindrical roller is parallel to the axis of the cylindrical roller (1).

7. The battery pole piece dust removal and feeding device according to claim 1, characterized in that: The maximum distance between the outer circumference of the rolling element (2) and the outer circumference of the cylindrical roller (1) is in the range of 1-5 mm.

8. A battery pole piece dust removal system, characterized in that: Comprising at least two battery pole piece dust removal and feeding devices according to any one of claims 1 to 7, the axes of two adjacent cylindrical rollers (1) are not located in the same horizontal plane, and the battery pole piece passes through the two adjacent cylindrical rollers (1) in an S shape in sequence.

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