Pole piece knurling mechanism applied to lithium battery and battery cell production device

Abstract

The invention discloses a pole piece knurling mechanism applied to a lithium battery and a battery cell production device. The pole piece knurling mechanism comprises a supporting assembly, the driving roller assembly and the lifting assembly are arranged on the supporting assembly, and an elastic face is arranged on the driving roller assembly; the knurling roller assembly comprises a sliding frame, and the sliding frame is longitudinally arranged on the supporting assembly in a sliding mode and is in transmission connection with the lifting assembly. The third driving motor is fixedly arranged on the sliding frame; the knurling roller main body is rotationally arranged on the sliding frame and is in transmission connection with the third driving motor; the pressure sensor is arranged on the sliding frame and is in contact connection with the lifting assembly; the displacement sensor is fixedly arranged on the sliding frame and right faces the driving roller assembly. The pressing distance of the knurling roller body is controlled through cooperation of the pressure sensor and the displacement sensor, and the problem that an existing pole piece knurling mechanism is poor in knurling consistency on different pole piece materials is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production equipment, and in particular to a pole piece knurling mechanism and a battery cell production equipment applied to lithium batteries. Background Art

[0002] With the development of lithium batteries, power lithium batteries are mainly used in passenger cars and energy storage. In the production process of power lithium batteries, there is a process called pole piece die cutting. The anode pole piece is cut out of the pole ear by a die cutting machine. The die-cut pole piece will enter the next process for winding. If the pole piece ear of the die-cut pole piece is not knurled, the pole piece ear will be folded in the subsequent winding process, resulting in product scrapping. Therefore, the die cutting machine needs to add a knurling device to ensure that the subsequent processes can be produced normally.

[0003] The publication number CN217596366U provides a lithium battery anode pole piece knurling device, including a support roller and a roller for knurling the pole piece, and also includes a support frame structure, a cylinder, and a roller positioning frame, wherein the roller is arranged on the roller positioning frame, the cylinder is arranged on the support frame structure, the roller positioning frame is connected to the piston rod of the cylinder, the roller positioning frame is located in the support frame structure, a guide rod guide structure is arranged between the roller positioning frame and the support frame structure, and the support roller is arranged in the support frame structure. Although this technical solution can realize the knurling operation of the pole piece, the knurling roller is a passive roller, and there is an instantaneous starting inertia when it contacts the pole piece, which is easy to form pulling or scratching, etc., and the powder loss is more serious; the lifting movement of the knurling roller is driven by the cylinder, the knurling concave and convex depth is mechanically limited, and the softness and hardness of the pole piece material generally have a greater impact, resulting in poor consistency. At the same time, it adopts continuous rolling, which is difficult to control intermittent rolling; therefore, a pole piece knurling mechanism and a battery cell production device applied to lithium batteries are provided to solve the above problems. Summary of the invention

[0004] One of the purposes of the present invention is to provide a pole piece knurling mechanism and a battery cell production device for lithium batteries, so as to solve the problem that the existing pole piece knurling mechanism has poor knurling consistency for different pole piece materials.

[0005] The present invention can realize a pole piece knurling mechanism and a battery cell production device applied to a lithium battery by the following technical solutions: The present invention discloses a pole piece knurling mechanism for lithium battery, comprising a support assembly; an active roller assembly, which is rotatably arranged on the support assembly, and an elastic surface is arranged on the active roller assembly; a lifting assembly, which is arranged on the support assembly; a knurling roller assembly, which is movably arranged on one side of the active roller assembly and is transmission-connected to the lifting assembly; Among them, the knurled roller assembly includes a sliding frame, which is longitudinally slidably arranged on the supporting assembly and is transmission-connected to the lifting assembly; a third driving motor fixedly arranged on the sliding frame; a knurled roller body rotatably arranged on the sliding frame and transmission-connected to the third driving motor, on which a plurality of protrusions are evenly arranged; a pressure sensor arranged on the sliding frame and contact-connected to the lifting assembly; a displacement sensor fixedly arranged on the sliding frame and facing the active roller assembly, and the downward pressure distance of the knurled roller body is controlled by the cooperation of the pressure sensor and the displacement sensor.

[0006] In one embodiment, the active roller assembly includes a first drive motor, which is fixedly mounted on the support assembly; two first bearings respectively arranged on the support assembly relative to each other; an active roller body respectively rotatably mounted on the two first bearings at both ends, which is transmission-connected to the first drive motor, and the elastic member is wrapped around the active roller body.

[0007] In one embodiment, a first slide rail and a second slide rail are fixedly disposed on the support assembly, and the lifting assembly and the sliding frame are slidably disposed on the first slide rail and the second slide rail, respectively.

[0008] In one embodiment, the lifting assembly includes a second drive motor fixedly mounted on the support assembly; an eccentric wheel mechanism transmission-connected to the second drive motor; a sliding mechanism slidably disposed on the first slide rail and transmission-connected to the eccentric wheel mechanism, and the sliding frame is fixedly connected to the sliding mechanism.

[0009] In one embodiment, the eccentric wheel mechanism includes an eccentric wheel body and a cam connecting rod; the eccentric wheel body is fixedly arranged on the rotating shaft of the second drive motor; one end of the cam connecting rod is fixedly connected to the eccentric wheel body, and the other end thereof is transmission connected to the sliding mechanism.

[0010] In one embodiment, the sliding mechanism includes a sliding block body, which is transmission-connected to the cam connecting rod; a first sliding seat fixedly connected to the sliding block body and slidably arranged on the first sliding rail; and a connecting head fixedly connected to the sliding block body and connected to the sliding frame.

[0011] In one embodiment, a second sliding seat is fixedly provided on the sliding frame, and the second sliding seat is slidably provided on the corresponding second sliding rail; a connecting cavity is provided on the sliding frame, and the connecting cavity is connected to the connecting head; the pressure sensor is provided in the connecting cavity and is in contact with the connecting head.

[0012] In one embodiment, the diameters of the knurled roller body and the active roller body are both greater than 60 mm; the arc length of the convex point on the knurled roller body is equal to the knurling length of the pole piece gap knurling; and the knurled roller body is made of rigid material.

[0013] In one embodiment, a dust suction assembly is provided on the side of the active roller assembly and the knurled roller assembly; the dust suction assembly includes a brush body, which is respectively in contact with and connected to the active roller body or the knurled roller body; a negative pressure dust removal hood is fixedly arranged on the side of the brush body, which is connected to the negative pressure generating device.

[0014] The present invention provides a battery cell production device for lithium batteries, comprising any one of the above-mentioned pole piece knurling mechanisms.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a pole piece knurling mechanism and a battery cell production device for lithium batteries. The pressure sensor and the displacement sensor are matched, and the eccentric wheel mechanism is driven by a motor to accurately rotate and control the downward pressing distance of the knurling roller body, thereby effectively solving the problem that the existing pole piece knurling mechanism has poor knurling consistency for different pole piece materials. The roller surface of the knurling roller body is not completely covered by convex points, and the arc length of the covering is the knurling length required by the knurling process. The knurling roller body is driven to rotate accurately by a motor, thereby effectively realizing intermittent knurling operation. At the same time, dust suction components are respectively arranged on the sides of the active roller body and the knurling roller body, and the dust on the active roller body and the knurling roller body is cleaned by the dust suction component to perform a cleaning operation, thereby ensuring that the roller surfaces of the active roller body and the knurling roller body are clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of a pole piece knurling mechanism applied to a lithium battery of the present invention, comprising a supporting assembly, a lifting assembly and a knurling roller assembly; Figure 2 yes Figure 1 The structure schematic diagram of a pole piece knurling mechanism applied to a lithium battery of the present invention from another perspective; Figure 3 yes Figure 1 The cross-sectional structure diagram of a pole piece knurling mechanism applied to a lithium battery of the present invention is shown; Figure 4 yes Figure 1 A schematic diagram of the structure of the support assembly shown; Figure 5 yes Figure 1 Schematic diagram of the connection structure of the lifting assembly and the knurled roller assembly shown; Figure 6 yes Figure 1 A schematic diagram of the structure of the lifting assembly shown; Figure 7 yes Figure 1 A schematic structural diagram of the knurled roller assembly shown; Figure 8 The present invention is a schematic diagram of the working principle of a pole piece knurling mechanism applied to a lithium battery.

[0018] Indications in the figure: 10, pole piece knurling mechanism; 11, support assembly; 111, mounting hole; 112, fixing hole; 113, first slide rail; 114, sliding cavity; 115, second slide rail; 12, active roller assembly; 121, first drive motor; 122, first bearing; 123, active roller body; 13, lifting assembly; 131, second drive motor; 132, eccentric wheel mechanism; 1321, eccentric wheel body; 1322, cam connecting rod; 133, sliding mechanism; 133 1. Sliding block body; 13311. Connecting hole; 1332. First sliding seat; 1333. Connecting head; 14. Knurled roller assembly; 141. Sliding frame; 1411. Second sliding seat; 1412. Connecting cavity; 1413. Second bearing; 142. Third driving motor; 143. Knurled roller body; 1431. Bump; 144. Pressure sensor; 145. Displacement sensor; 15. Dust collection assembly; 151. Brush body; 152. Negative pressure dust cover; 20. Pole piece. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 8As shown, a pole piece knurling mechanism 10 applied to a lithium battery of the present invention mainly comprises a supporting assembly 11, an active roller assembly 12, a lifting assembly 13, a knurling roller assembly 14 and two dust collecting assemblies 15; the supporting assembly 11 is a supporting body; the active roller assembly 12 is rotatably arranged on the supporting assembly 11, and performs a conveying operation on the pole piece 20 arranged thereon; the lifting assembly 13 is arranged on the supporting assembly 11; the knurling roller assembly 14 is movably arranged on one side of the active roller assembly 12 and is transmission-connected with the lifting assembly 13, and the lifting assembly 13 drives the knurling roller assembly 14 to perform a lifting movement relative to the active roller assembly 12, so that the knurling roller assembly 14 cooperates with the active roller assembly 12 to perform a knurling operation on the pole piece 20 arranged on the active roller assembly 12; the two dust collecting assemblies 15 are respectively arranged on the sides of the active roller assembly 12 and the knurling roller assembly 14, and respectively clean the dust on the active roller assembly 12 and the knurling roller assembly 14, so as to ensure the cleanliness of the roller surfaces of the active roller assembly 12 and the knurling roller assembly 14.

[0022] See also Figure 1-Figure 4 As shown, in this embodiment, the support assembly 11 is respectively provided with a plurality of mounting holes 111 and a plurality of fixing holes 112, and the active roller assembly 12 is rotatably arranged on the support assembly 11 through the corresponding mounting holes 111; the driving motors of the active roller assembly 12 and the lifting assembly 13 are respectively fixedly arranged on the support assembly 11 through the corresponding fixing holes 112; the first slide rail 113 and the second slide rail 115 are fixedly arranged on the support assembly 11, and the lifting assembly 13 and the knurled roller assembly 14 are respectively slidably arranged on the first slide rail 113 and the second slide rail 115, and the first slide rail 113 and the second slide rail 115 respectively guide and limit the lifting and lowering movements of the lifting assembly 13 and the knurled roller assembly 14; a sliding cavity 114 is also penetrated through the support assembly 11, and the knurled roller assembly 14 can perform lifting and lowering movements in the sliding cavity 114.

[0023] See also Figure 1-Figure 3 As shown, in this embodiment, the active roller assembly 12 includes a first drive motor 121, two first bearings 122 and an active roller body 123; the first drive motor 121 is fixedly mounted on the support assembly 11 through the corresponding fixing holes 112; the two first bearings 122 are respectively arranged on the support assembly 11 in a relatively opposite manner; the two ends of the active roller body 123 are respectively rotatably arranged on the two first bearings 122 and are transmission-connected with the first drive motor 121, the first drive motor 121 drives the active roller body 123 to rotate on the two first bearings 122, thereby driving the pole piece 20 arranged on the active roller body 123 to perform a transmission operation, and an elastic member is arranged around and wrapped on the active roller body 123, which cooperates with the knurling roller assembly 14 to perform a knurling operation on the pole piece 20 arranged thereon. Specifically, the first drive motor 121 adopts a servo motor, which is convenient for precise transmission operation; the diameter of the active roller body 123 is greater than 60mm.

[0024] See also Figure 5 and Figure 6 As shown, in this embodiment, the lifting assembly 13 includes a second drive motor 131, an eccentric wheel mechanism 132 and a sliding mechanism 133; the second drive motor 131 is fixedly installed on the support assembly 11 through the corresponding fixing hole 112; the eccentric wheel mechanism 132 is transmission-connected to the second drive motor 131, and the second drive motor 131 drives the eccentric wheel mechanism 132 to rotate; the sliding mechanism 133 is slidingly arranged on the first slide rail 113 and transmission-connected to the eccentric wheel mechanism 132, the knurled roller assembly 14 is fixedly connected to the sliding mechanism 133, and the second drive motor 131 drives the knurled roller assembly 14 to move longitudinally through the eccentric wheel mechanism 132 and the sliding mechanism 133 in turn, so that the knurled roller assembly 14 cooperates with the active roller assembly 12 to perform knurling operation on the pole piece 20 arranged on the active roller assembly 12.

[0025] See also Figure 6 As shown, specifically, the second drive motor 131 adopts a servo motor, which is convenient for controlling the precise longitudinal movement of the sliding mechanism 133; the eccentric wheel mechanism 132 includes an eccentric wheel body 1321 and a cam connecting rod 1322; the eccentric wheel body 1321 is fixedly arranged on the rotating shaft of the second drive motor 131, and the second drive motor 131 drives the eccentric wheel body 1321 to perform eccentric movement; one end of the cam connecting rod 1322 is fixedly connected to the eccentric wheel body 1321, and the other end thereof is transmission-connected to the sliding mechanism 133, and the second drive motor 131 drives the sliding mechanism 133 to move longitudinally through the eccentric wheel body 1321 and the cam connecting rod 1322 in turn. In this embodiment, the sliding mechanism 133 includes a sliding block body 1331, a first sliding seat 1332 and a connecting head 1333; the sliding block body 1331 is transmission-connected to the cam connecting rod 1322; the first sliding seat 1332 is fixedly connected to the sliding block body 1331 and is slidably arranged on the first slide rail 113; the connecting head 1333 is fixedly connected to the sliding block body 1331 and is connected to the knurled roller assembly 14; specifically, a connecting hole 13311 is arranged on the sliding block body 1331, and the cam at one end of the cam connecting rod 1322 is arranged in the connecting hole 13311.

[0026] See also Figure 5 and Figure 7As shown, in this embodiment, the knurled roller assembly 14 includes a sliding frame 141, a third driving motor 142, a knurled roller body 143, a pressure sensor 144 and a displacement sensor 145; the sliding frame 141 is longitudinally slidably arranged on the supporting assembly 11 and is transmission-connected to the lifting assembly 13, and the lifting assembly 13 drives the sliding frame 141 to move longitudinally; the third driving motor 142 is fixedly arranged on the sliding frame 141, and moves following the movement of the sliding frame 141; a plurality of convex points 1431 are evenly arranged on the knurled roller body 143, which is rotationally arranged on the sliding frame 141 and is drivingly connected to the third driving motor 142, and the third The driving motor 142 drives the knurled roller body 143 to rotate on the sliding frame 141; the pressure sensor 144 is arranged on the sliding frame 141 and is in contact with the connecting head 1333, and it can sense the pressure between the knurled roller body 143 and the active roller body 123 in real time; the displacement sensor 145 is fixedly arranged on the sliding frame 141 and is opposite to the active roller body 123, and it actually detects the distance between the knurled roller body 143 and the active roller body 123 in real time; the downward pressure distance of the knurled roller body 143 is controlled by the cooperation of the pressure sensor 144 and the displacement sensor 145, so as to ensure the consistency of the knurling on the pole piece 20.

[0027] See also Figure 7 and Figure 8 As shown, specifically, a second sliding seat 1411 is fixedly provided on the sliding frame 141, and the second sliding seat 1411 is slidably provided on the corresponding second slide rail 115, and the longitudinal movement of the sliding frame 141 is guided and limited by the second slide rail 115; a connecting cavity 1412 is also provided on the sliding frame 141, which is connected to the connecting head 1333, and the pressure sensor 144 is arranged in the connecting cavity 1412 and is in contact and connected with the connecting head 1333; two second bearings 1413 are relatively arranged on the sliding frame 141, and the two ends of the knurled roller body 143 are respectively rotatably provided on the two second bearings 1413 and are transmission-connected to the third drive motor 142, and the third drive motor 142 drives the knurled roller body 143 to rotate between the two second bearings 1413; the third drive motor 142 adopts a servo motor, which is convenient for precise control of the rotation of the knurled roller body 143. Preferably, the diameter of the knurled roller body 143 is greater than 60 mm, and the arc length W1 of the protrusion 1431 thereon is equal to the knurling length W2 of the knurling of the gap between the pole piece 20; the knurled roller body 143 is made of rigid material, and the plurality of protrusions 1431 are integrally formed with the knurled roller body 143. Preferably, the material of the knurled roller body 143 is aviation aluminum hard anode.

[0028] See also Figure 1-Figure 3As shown, in the present embodiment, the dust collecting assembly 15 comprises a brush body 151 and a negative pressure dust hood 152; the brush body 151 is respectively in contact with the active roller body 123 or the knurled roller body 143, so that the brush body 151 can clean the dust on the active roller body 123 or the knurled roller body 143, thereby ensuring that the roller surface of the active roller body 123 or the knurled roller body 143 is clean; the negative pressure dust hood 152 is fixedly arranged on the side of the brush body 151, and is connected to the negative pressure generating device, so as to facilitate the collection of the dust cleaned by the brush body 151.

[0029] A battery cell production device for lithium batteries according to the present invention comprises any one of the above-mentioned pole piece knurling mechanisms 10.

[0030] See also Figure 8 As shown, it should be noted that the specific working process of the pole piece knurling mechanism and battery cell production device applied to lithium batteries of the present invention is as follows: when the active roller assembly 12 conveys the pole piece 20 arranged thereon, the rotation starting point on the knurled roller body 143 is the starting position of the convex point 1431 thereon or a certain arc is reserved, and the reserved arc is used for acceleration buffering of rotation start; when the detection mechanism detects that knurling is required, the lifting assembly 13 drives the knurled roller body 143 to press down while the third driving motor 142 drives the knurled roller body 143 to rotate, so that the linear speed of the knurled roller body 143 is the same as the speed of the active roller assembly 12 conveying the pole piece 20; the multiple convex points 1431 arranged on the knurled roller body 143 respectively start to contact with the pole piece 20, and the knurled roller body 14 3 is squeezed and contacted with the active roller body 123, so that the elastic member on the active roller body 123 is deformed, and thus transferred to the position where the pole piece 20 needs to be knurled to form a convex point, and the arc length W1 formed by the convex point 1431 on the knurled roller body 143 is equal to the knurling length W2 of the gap knurling of the pole piece 20; the interval L between the two knurling positions can be controlled by the stop time of the knurled roller body 143, that is, intermittent rotation; at the same time, the meshing force between the knurled roller body 143 and the active roller body 123 affects the depth of the convex point formed on the pole piece 20, and the rotation angle of the eccentric wheel mechanism 132 can be controlled in real time through the cooperation of the pressure sensor 144 and the displacement sensor 145, and converted into the pressing depth of the knurled roller body 143, so as to realize the precise control of the pressing of the knurled roller body 143.

[0031] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the 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.

[0032] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. 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, and these 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 pole piece knurling mechanism for lithium batteries, characterized in that: include: Support components; An active roller assembly is rotatably arranged on the support assembly, and an elastic surface is arranged on the active roller assembly; A lifting assembly, which is arranged on the supporting assembly; A knurled roller assembly, which is movably arranged on one side of the active roller assembly and is transmission-connected to the lifting assembly; Among them, the knurled roller assembly includes a sliding frame, which is longitudinally slidably arranged on the supporting assembly and is transmission-connected to the lifting assembly; a third driving motor fixedly arranged on the sliding frame; a knurled roller body rotatably arranged on the sliding frame and transmission-connected to the third driving motor, on which a plurality of protrusions are evenly arranged; a pressure sensor arranged on the sliding frame and contact-connected to the lifting assembly; a displacement sensor fixedly arranged on the sliding frame and facing the active roller assembly, and the downward pressure distance of the knurled roller body is controlled by the cooperation of the pressure sensor and the displacement sensor.

2. A pole piece knurling mechanism for lithium battery according to claim 1, characterized in that: The active roller assembly comprises a first driving motor, which is fixedly arranged on the supporting assembly; and two first bearings respectively arranged on the supporting assembly opposite to each other; The active roller body is rotatably arranged on the two first bearings at both ends, and is drivingly connected to the first driving motor. The elastic member is arranged around and wrapped on the active roller body.

3. The pole piece knurling mechanism for lithium battery according to claim 1, characterized in that: The support assembly is fixedly provided with a first slide rail and a second slide rail, and the lifting assembly and the sliding frame are slidably provided on the first slide rail and the second slide rail respectively.

4. A pole piece knurling mechanism for lithium battery according to claim 3, characterized in that: The lifting assembly includes a second drive motor, which is fixedly mounted on the support assembly; An eccentric wheel mechanism transmission-connected to the second drive motor; a sliding mechanism slidably arranged on the first slide rail and transmission-connected to the eccentric wheel mechanism, and the sliding frame is fixedly connected to the sliding mechanism.

5. A pole piece knurling mechanism for lithium battery according to claim 4, characterized in that: The eccentric wheel mechanism comprises an eccentric wheel body and a cam connecting rod; the eccentric wheel body is fixedly arranged on the rotating shaft of the second driving motor; one end of the cam connecting rod is fixedly connected to the eccentric wheel body, and the other end thereof is transmission-connected to the sliding mechanism.

6. A pole piece knurling mechanism for lithium battery according to claim 5, characterized in that: The sliding mechanism includes a sliding block body, which is transmission-connected to the cam connecting rod; a first sliding seat fixedly connected to the sliding block body and slidably arranged on the first sliding rail; and a connecting head fixedly connected to the sliding block body and connected to the sliding frame.

7. A pole piece knurling mechanism for lithium battery according to claim 6, characterized in that: A second sliding seat is fixedly arranged on the sliding frame, and the second sliding seat is slidably arranged on the corresponding second sliding rail; a connecting cavity is arranged on the sliding frame, and the connecting cavity is connected to the connecting head; the pressure sensor is arranged in the connecting cavity and is in contact with the connecting head.

8. The pole piece knurling mechanism for lithium battery according to claim 2, characterized in that: The diameters of the knurled roller body and the active roller body are both greater than 60 mm; the arc length of the convex point on the knurled roller body is equal to the knurling length of the pole piece gap knurling; the knurled roller body is made of rigid material.

9. A pole piece knurling mechanism for lithium battery according to claim 8, characterized in that: The sides of the active roller assembly and the knurled roller assembly are both provided with dust suction assemblies; the dust suction assembly includes a brush body, which is respectively in contact with and connected to the active roller body or the knurled roller body; a negative pressure dust removal cover is fixedly arranged on the side of the brush body and is connected to a negative pressure generating device.

10. A cell production device for lithium batteries, characterized in that: It comprises the pole piece knurling mechanism as described in any one of claims 1 to 9.

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