Lithium battery sheet making machine and its rolling and pasting sticker mechanism

Abstract

The present invention discloses a rolling and pasting mechanism for adhesive tapes, which includes a first rolling and pasting shaft, a second rolling and pasting shaft arranged side by side and spaced apart from the first rolling and pasting shaft, and a rolling drive for driving the first rolling and pasting shaft and the second rolling and pasting shaft to roll synchronously. A gap for the passage of an external pole piece is defined between the first rolling and pasting shaft and the second rolling and pasting shaft. Under the drive of the rolling drive, the first rolling and pasting shaft and the second rolling and pasting shaft respectively paste the adhesive tapes adsorbed by vacuum onto the pole piece passing through the gap, so as to achieve the purpose of rolling and pasting adhesive tapes on the upper and lower surfaces of the pole piece passing through the gap surrounded by the first rolling and pasting shaft and the second rolling and pasting shaft, thereby improving the efficiency and quality of pasting adhesive tapes on the pole piece. Additionally, the present invention also discloses a lithium battery sheet making machine having the rolling and pasting mechanism for adhesive tapes.

Description

Technical Field

[0001] The present invention relates to the field of lithium batteries, and particularly to a lithium battery sheet making machine and a rolling pair sticking tape mechanism thereof. Background Art

[0002] With the continuous development of the economy and the continuous progress of society, various material consumer goods are provided for people's production and life, and lithium-ion batteries are one of many material consumer goods.

[0003] As is well known, lithium-ion batteries are widely used in electronic products, electric vehicles or new energy vehicles, and are increasingly favored by people.

[0004] Among them, in the production process of lithium-ion batteries, pole piece sticking is a very critical process. Pole piece sticking is to stick tape on the positive and negative pole pieces for battery use to protect the pole pieces.

[0005] In the existing lithium battery sheet making equipment, due to its unreasonable design, after a tape sticking mechanism at one place sticks tape on the upper or lower surface of the pole piece, the pole piece is then conveyed to another tape sticking mechanism, and the tape is correspondingly stuck on the lower or upper surface of the pole piece by the other tape sticking mechanism, thus achieving the purpose of sticking tape on the upper and lower surfaces of the conveyed pole piece; however, such an arranged tape sticking mechanism results in low tape sticking efficiency of the pole piece; at the same time, since the pole piece is stuck with tape after being conveyed from one place to another, the pole piece with tape stuck on one side is affected by improper conveyance, which affects the quality of tape sticking on the other side.

[0006] Therefore, there is an urgent need for a lithium battery sheet making machine and a rolling pair sticking tape mechanism that can improve the efficiency and quality of pole piece tape sticking to overcome the above defects. Summary of the Invention

[0007] One object of the present invention is to provide a rolling pair sticking tape mechanism that can improve the efficiency and quality of pole piece tape sticking.

[0008] Another object of the present invention is to provide a lithium battery sheet making machine that can improve the efficiency and quality of pole piece tape sticking.

[0009] To achieve the above object, the rolling pair sticking tape mechanism of the present invention includes a first rolling sticking shaft, a second rolling sticking shaft arranged side by side and spaced apart from the first rolling sticking shaft, and a rolling drive for driving the first rolling sticking shaft and the second rolling sticking shaft to roll synchronously. A gap for the conveyance of an external pole piece is defined between the first rolling sticking shaft and the second rolling sticking shaft, and the first rolling sticking shaft and the second rolling sticking shaft stick the tapes adsorbed by vacuum on each of them to the pole piece passing through the gap under the drive of the rolling drive.

[0010] Preferably, the first rolling and pasting shaft has a first air flow channel and a first arc-shaped rolling surface with its arc center located on the axis of the first rolling and pasting shaft. A plurality of first openings that are spaced apart from each other and communicate with the first air flow channel are arranged on the first arc-shaped rolling surface. The second rolling and pasting shaft has a second air flow channel and a second arc-shaped rolling surface with its arc center located on the axis of the second rolling and pasting shaft. A plurality of second openings that are spaced apart and communicate with the second air flow channel are arranged on the second arc-shaped rolling surface. During the process of the rolling driver driving the first rolling and pasting shaft and the second rolling and pasting shaft to roll synchronously, one of the first arc-shaped rolling surface and the second arc-shaped rolling surface rotates to the glue pasting position, while the other rotates to a misaligned position that is misaligned with the glue pasting position.

[0011] Preferably, the first rolling and pasting shaft has a first back surface facing away from the first arc-shaped rolling surface and a first intermediate connecting surface connecting the first arc-shaped rolling surface and the first back surface. The offset distance of the first arc-shaped rolling surface relative to the axis of the first rolling and pasting shaft is greater than the offset distances of the first back surface and the first intermediate connecting surface relative to the axis of the first rolling and pasting shaft.

[0012] Preferably, a third opening communicating with the first air flow channel is formed on the first back surface.

[0013] Preferably, the second rolling and pasting shaft has a second back surface facing away from the second arc-shaped rolling surface and a second intermediate connecting surface connecting the second arc-shaped rolling surface and the second back surface. The offset distance of the second arc-shaped rolling surface relative to the axis of the second rolling and pasting shaft is greater than the offset distances of the second back surface and the second intermediate connecting surface relative to the axis of the second rolling and pasting shaft.

[0014] Preferably, a fourth opening communicating with the second air flow channel is formed on the second back surface.

[0015] Preferably, the rolling and pasting mechanism for pair gluing of the present invention further includes a first mounting shaft and a second mounting shaft that are arranged side by side and separated from each other. A gear and a transmission wheel are sleeved on each of the first mounting shaft and the second mounting shaft. A mating wheel aligned with the transmission wheel on the first mounting shaft is sleeved on the first axial end of the first rolling and pasting shaft. A mating wheel aligned with the transmission wheel on the second mounting shaft is sleeved on the first axial end of the second rolling and pasting shaft. The gear on the first mounting shaft and the gear on the second mounting shaft are meshed with each other. A first transmission member is wound around the transmission wheel on the first mounting shaft and the mating wheel on the first rolling and pasting shaft. A second transmission member is wound around the transmission wheel on the second mounting shaft and the mating wheel on the second rolling and pasting shaft. The output end of the rolling driver is assembled and connected to the first mounting shaft or the second mounting shaft.

[0016] Preferably, the first air flow channel penetrates through the second axial end of the first tape rolling and pasting shaft, and the second air flow channel penetrates through the second axial end of the second tape rolling and pasting shaft.

[0017] To achieve the above object, the lithium battery sheet making machine of the present invention includes a frame and a rolling and pasting mechanism, a first tape wheel, a second tape wheel, a first tape opening mechanism, a second tape opening mechanism, a first tape pressing mechanism, a second tape pressing mechanism, a first cutting mechanism, a second cutting mechanism, a first tape pulling mechanism and a second tape pulling mechanism assembled on the frame. The first tape pulling mechanism is arranged side by side with the first tape rolling and pasting shaft in the up and down direction of the frame and is located beside the first tape rolling and pasting shaft on the side facing away from the second tape rolling and pasting shaft. The second tape pulling mechanism is arranged side by side with the second tape rolling and pasting shaft in the up and down direction of the frame and is located beside the second tape rolling and pasting shaft on the side facing away from the first tape rolling and pasting shaft. The first tape pulling mechanism, the first cutting mechanism, the first tape pressing mechanism, the first tape opening mechanism and the first tape wheel are arranged in sequence corresponding to each other in the left and right direction of the frame. The second tape pulling mechanism, the second cutting mechanism, the second tape pressing mechanism, the second tape opening mechanism and the second tape wheel are arranged in sequence corresponding to each other in the left and right direction of the frame.

[0018] Preferably, the first tape rolling and pasting shaft and the second tape rolling and pasting shaft are located on the front side of the frame, and the rolling driver is located on the rear side of the frame.

[0019] Compared with the prior art, since the rolling and pasting mechanism of the present invention includes a first tape rolling and pasting shaft, a second tape rolling and pasting shaft arranged side by side and spaced apart from the first tape rolling and pasting shaft, and a rolling driver for driving the first tape rolling and pasting shaft and the second tape rolling and pasting shaft to roll synchronously, a gap for the external pole piece to pass through is enclosed between the first tape rolling and pasting shaft and the second tape rolling and pasting shaft. The first tape rolling and pasting shaft and the second tape rolling and pasting shaft paste the adhesive tapes adsorbed by vacuum on the pole piece passing through the gap respectively under the drive of the rolling driver, so as to achieve the purpose of rolling and pasting the adhesive tapes on the upper and lower surfaces of the pole piece passing through the gap enclosed by the first tape rolling and pasting shaft and the second tape rolling and pasting shaft, avoiding the need for the existing lithium battery sheet making equipment to paste the adhesive tape on the upper or lower surface of the pole piece at one paste position and then transport the pole piece to another paste position to paste the adhesive tape on the lower or upper surface, thereby improving the efficiency and quality of pasting the adhesive tape on the pole piece. Description of the Drawings

[0020] Figure 1 is a schematic plan structure view of the lithium battery sheet making machine of the present invention projected from the front to the back.

[0021] Figure 2 is a schematic three-dimensional structure view of the rolling and pasting mechanism of the present invention.

[0022] Figure 3 is Figure 2 a schematic three-dimensional structure view when the second tape rolling and pasting shaft in the shown rolling and pasting mechanism rotates to the tape rolling and pasting position.

[0023] Figure 4 is Figure 3 The schematic plan view of the rolling sticker pasting mechanism in the state shown projected from the front to the back.

[0024] Figure 5 is Figure 4 The schematic plan view showing the pole piece of the rolling sticker pasting mechanism shown.

[0025] Figure 6 It is the schematic plan view of the first sticker rolling shaft in the rolling sticker pasting mechanism of the present invention projected axially.

[0026] Figure 7 It is the schematic plan view of the second sticker rolling shaft in the rolling sticker pasting mechanism of the present invention projected axially.

[0027] Figure 8 It is the schematic internal structure view of the first sticker rolling shaft in the rolling sticker pasting mechanism of the present invention.

[0028] Figure 9 It is the schematic internal plan view of the second sticker rolling shaft in the rolling sticker pasting mechanism of the present invention. Detailed Embodiment

[0029] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings of the specification.

[0030] Please refer to Figure 1 , the lithium battery sheet making machine 1000 of the present invention includes a frame 200 and a rolling sticker pasting mechanism 100, a first tape wheel 300a, a second tape wheel 300b, a first glue opening mechanism 400a, a second glue opening mechanism 400b, a first glue pressing mechanism 500a, a second glue pressing mechanism 500b, a first cutting mechanism 600a, a second cutting mechanism 600b, a first tape pulling mechanism 700a and a second tape pulling mechanism 700b assembled on the frame 200. The first tape pulling mechanism 700a is arranged side by side with the first sticker rolling shaft 10 described below in the up and down direction of the frame 200 and is located beside the side of the first sticker rolling shaft 10 facing away from the second sticker rolling shaft 20 (for example Figure 1 on the upper side in Figure 1at the lower side beside); the first glue pulling mechanism 700a, the first cutting mechanism 600a, the first glue pressing mechanism 500a, the first glue opening mechanism 400a and the first tape wheel 300a are arranged in sequence corresponding to each other along the left-right direction of the frame 200, and the second glue pulling mechanism 700b, the second cutting mechanism 600b, the second glue pressing mechanism 500b, the second glue opening mechanism 400b and the second tape wheel 300b are arranged in sequence corresponding to each other along the left-right direction of the frame 200. Since the creative point of the present application is the rolling pair sticking mechanism 100, and the positional relationship between the rolling pair sticking mechanism 100 and the first tape wheel 300a, the second tape wheel 300b, the first glue opening mechanism 400a, the second glue opening mechanism 400b, the first glue pressing mechanism 500a, the second glue pressing mechanism 500b, the first cutting mechanism 600a, the second cutting mechanism 600b, the first glue pulling mechanism 700a and the second glue pulling mechanism 700b on the frame 200, and the specific structures of the first tape wheel 300a, the second tape wheel 300b, the first glue opening mechanism 400a, the second glue opening mechanism 400b, the first glue pressing mechanism 500a, the second glue pressing mechanism 500b, the first cutting mechanism 600a, the second cutting mechanism 600b, the first glue pulling mechanism 700a and the second glue pulling mechanism 700b are well-known in the art, they will not be described in detail herein. More specifically, as follows:

[0031] As Figures 2 to 5 shown, the rolling pair sticking mechanism 100 includes a first rolling sticking shaft 10, a second rolling sticking shaft 20 arranged side by side and spaced apart from the first rolling sticking shaft 10, and a rolling driver 30 for driving the first rolling sticking shaft 10 and the second rolling sticking shaft 20 to roll synchronously. A gap 40 for the external pole piece 800 to pass through is defined between the first rolling sticking shaft 10 and the second rolling sticking shaft 20. The first rolling sticking shaft 10 and the second rolling sticking shaft 20 stick the adhesive tapes adsorbed by them to the pole piece 800 passing through the gap 40 under the drive of the rolling driver 30. Specifically, as shown in Figure 8 and Figure 9 shown, the first rolling sticking shaft 10 has a first air flow channel 11 and a first arc rolling surface 12 with the arc center located on the axis line C1 of the first rolling sticking shaft 10. A plurality of first openings 13 spaced apart from each other and communicating with the first air flow channel 11 are arranged on the first arc rolling surface 12 to ensure the reliability of the first rolling sticking shaft 10 in adsorbing the adhesive tape and sticking the adhesive tape to the pole piece 800; the second rolling sticking shaft 20 has a second air flow channel 21 and a second arc rolling surface 22 with the arc center located on the axis line C2 of the second rolling sticking shaft 20. A plurality of second openings 23 spaced apart and communicating with the second air flow channel 21 are arranged on the second arc rolling surface 22 to ensure the reliability of the second rolling sticking shaft 20 in adsorbing the adhesive tape and sticking the adhesive tape to the pole piece 800; during the process of driving the first rolling sticking shaft 10 and the second rolling sticking shaft 20 to roll synchronously, the rolling driver 30 rotates the second arc rolling surface 22 to the rolling sticking position (see Figure 3 、Figure 4 and Figure 5 ) and the first arc rolling surface 12 is rotated to a misaligned position that is misaligned with the sticker glue position (see Figure 3 , Figure 4 and Figure 5 ). The purpose of this design is to achieve the purpose of successively pasting sticker paper on the pole piece 800 passing through the gap 40. For example, first paste the upper surface of the pole piece 800 and then paste the lower surface of the pole piece 800, or first paste the lower surface of the pole piece 800 and then paste the upper surface of the pole piece 800. It can be understood that, according to actual needs, during the process of the rolling drive 30 driving the first sticker axis 10 and the second sticker axis 20 to roll synchronously, the first arc rolling surface 12 can be rotated to the sticker glue position while the second arc rolling surface 22 is rotated to a misaligned position that is misaligned with the sticker glue position. Therefore, it is not limited to the above description.

[0032] As Figure 6 shown, the first sticker axis 10 has a first back surface 14 facing away from the first arc rolling surface 12 and a first intermediate connection surface 15 connected between the first arc rolling surface 12 and the first back surface 14. The offset distance D1 of the first arc rolling surface 12 relative to the axis line C1 of the first sticker axis 10 is greater than the offset distances D2 (D3) of the first back surface 14 and the first intermediate connection surface 15 relative to the axis line C1 of the first sticker axis 10. This design effectively prevents the possibility that the first back surface 14 and the first intermediate connection surface 15 touch the pole piece 800 passing through the gap 40 during the rotation of the first sticker axis 10, thereby ensuring the reliability of pasting the sticker paper on the pole piece 800 passing through the gap 40 by the first arc rolling surface 12 of the first sticker axis 10. Specifically, in Figure 8 , a third opening 16 communicating with the first air flow channel 11 is provided on the first back surface 14. Preferably, the first intermediate connection surface 15 is a plane, but it is not limited thereto.

[0033] As Figure 7 shown, the second sticker axis 20 has a second back surface 24 facing away from the second arc rolling surface 22 and a second intermediate connection surface 25 connected between the second arc rolling surface 22 and the second back surface 24. The offset distance F1 of the second arc rolling surface 22 relative to the axis line C2 of the second sticker axis 20 is greater than the offset distances F2 (F3) of the second back surface 24 and the second intermediate connection surface 25 relative to the axis line C2 of the second sticker axis 20. This design effectively prevents the possibility that the second back surface 24 and the second intermediate connection surface 25 touch the pole piece 800 passing through the gap 40 during the rotation of the second sticker axis 20, thereby ensuring the reliability of pasting the sticker paper on the pole piece 800 passing through the gap 40 by the second arc rolling surface 22 of the second sticker axis 20. Specifically, in Figure 9In it, a fourth opening 26 communicating with the second air flow channel 21 is formed in the second back opposite surface 24. Preferably, the second intermediate connecting surface 25 is a flat surface, but this is not limitative.

[0034] As Figures 2 to 5 shown, the rolling and pasting mechanism 100 further includes a first mounting shaft 50 and a second mounting shaft 60 which are arranged side by side and separated from each other. A gear 71 and a transmission wheel 72 are sleeved on each of the first mounting shaft 50 and the second mounting shaft 60. A mating wheel 73 aligned with the transmission wheel 72 on the first mounting shaft 50 is sleeved on the first axial end 10a of the first rolling and pasting shaft 10, and a mating wheel 73 aligned with the transmission wheel 72 on the second mounting shaft 60 is sleeved on the first axial end 20a of the second rolling and pasting shaft 20. The gear 71 on the first mounting shaft 50 and the gear 71 on the second mounting shaft 60 are meshed with each other. A first transmission member 74 is wound around the transmission wheel 72 on the first mounting shaft 50 and the mating wheel 73 on the first rolling and pasting shaft 10, and a second transmission member 75 is wound around the transmission wheel 72 on the second mounting shaft 60 and the mating wheel 73 on the second rolling and pasting shaft 20; the output end of the rolling driver 30 is assembled and connected to the second mounting shaft 60; so as to achieve the purpose of driving the first rolling and pasting shaft 10 and the second rolling and pasting shaft 20 to rotate synchronously by the same rolling driver 30, thereby simplifying the structure and making the structure more compact; of course, according to actual needs, the output end of the rolling driver 30 can also be assembled and connected to the first mounting shaft 50, so this is not limitative. Specifically, in Figure 8 and Figure 9 it, the first air flow channel 11 penetrates through the second axial end 10b of the first rolling and pasting shaft 10, and the second air flow channel 21 penetrates through the second axial end 20b of the second rolling and pasting shaft 20. Such a design facilitates the connection and installation of the first rolling and pasting shaft 10 and the second rolling and pasting shaft 20 to an external vacuum device respectively and avoids interference with the mating wheel 73. For example, the first transmission member 74 and the second transmission member 75 are belts, and correspondingly, the transmission wheel 72 and the mating wheel 73 are belt wheels; of course, according to actual needs, the first transmission member 74 and the second transmission member 75 can be chains, and correspondingly, the transmission wheel 72 and the mating wheel 73 are sprockets, so this is not limitative. Among them, in order to make the arrangement of the rolling driver 30, the first rolling and pasting shaft 10 and the second rolling and pasting shaft 20 on the frame 200 more compact, in Figure 1 it, the first rolling and pasting shaft 10 and the second rolling and pasting shaft 20 are located on the front side of the frame 200, and the rolling driver 30 is located on the rear side of the frame 200.

[0035] With reference to the accompanying drawings, the working principle of the lithium battery laminator of the present invention will be described: The rolling driver 30 drives the first laminating shaft 10 and the second laminating shaft 20 to rotate synchronously through the cooperation of the gear 71, the transmission wheel 72, the mating wheel 73, the first transmission member 74 and the second transmission member 75, so that the second arc laminating surface 22 of the second laminating shaft 20 rotates to the glue preparation position close to the second glue pulling mechanism 700b and the first arc laminating surface 12 of the first laminating shaft 10 rotates to the glue preparation position close to the first glue pulling mechanism 700a are alternately realized in sequence.

[0036] When the first arc laminating surface 12 of the first laminating shaft 10 rotates to the glue preparation position, at this time, the first glue pressing mechanism 500a performs a glue loosening action, and the first glue pulling mechanism 700a pulls the glue away from the first glue pressing mechanism 500a; when the first glue pulling mechanism 700a reaches the predetermined position, while the first arc laminating surface 12 adsorbs the glue paper pulled out by the first glue pulling mechanism 700a, the first glue pressing mechanism 500a performs a glue pressing action, and the first cutting mechanism 600a performs a cutting action to cut the glue paper between the first glue pulling mechanism 700a and the first glue pressing mechanism 500a, thereby completing the glue preparation process of the first arc laminating surface 12 of the first laminating shaft 10.

[0037] Similarly, when the second arc laminating surface 22 of the second laminating shaft 20 rotates to the glue preparation position, at this time, the second glue pressing mechanism 500b performs a glue loosening action, and the second glue pulling mechanism 700b pulls the glue away from the second glue pressing mechanism 500b; when the second glue pulling mechanism 700b reaches the predetermined position, while the second arc laminating surface 22 adsorbs the glue paper pulled out by the second glue pulling mechanism 700b, the second glue pressing mechanism 500b performs a glue pressing action, and the second cutting mechanism 600b performs a cutting action to cut the glue paper between the second glue pulling mechanism 700b and the second glue pressing mechanism 500b, thereby completing the glue preparation process of the second arc laminating surface 22 of the second laminating shaft 20.

[0038] Since the glue preparation of the second laminating shaft 20 and the glue preparation of the first laminating shaft 10 are alternately realized in sequence, during the process of the rolling driver 300 driving the first laminating shaft 10 and the second laminating shaft 20 to rotate synchronously, first, the second laminating shaft 20 with the glue preparation completed pastes the glue paper under the pole piece 800 passing through the gap 40, and then the first laminating shaft 10 with the glue preparation completed pastes the glue paper on the upper surface of the pole piece 800 passing through the gap 40, thereby achieving the purpose of pasting the glue paper on both the upper and lower surfaces of the pole piece 800 passing through the gap 40.

[0039] Compared with the prior art, since the rolling and pasting mechanism 100 of the present invention includes a first rolling and pasting shaft 10, a second rolling and pasting shaft 20 arranged side by side and spaced apart from the first rolling and pasting shaft 10, and a rolling driver 30 for driving the first rolling and pasting shaft 10 and the second rolling and pasting shaft 20 to roll synchronously, a gap 40 for the conveyance of an external pole piece 800 is defined between the first rolling and pasting shaft 10 and the second rolling and pasting shaft 20. The first rolling and pasting shaft 10 and the second rolling and pasting shaft 20 paste the adhesive tapes adsorbed by vacuum on their respective surfaces onto the pole piece 800 passing through the gap 40 under the drive of the rolling driver 30, so as to achieve the purpose of rolling and pasting adhesive tapes on the upper and lower surfaces of the pole piece 800 passing through the gap 40 surrounded by the first rolling and pasting shaft 10 and the second rolling and pasting shaft 20, avoiding the need for the existing lithium battery sheet-making equipment to paste the adhesive tape on the upper or lower surface of the pole piece at one pasting mechanism and then transport the pole piece to another pasting mechanism for pasting the adhesive tape on the lower or upper surface, thereby improving the efficiency and quality of pasting the adhesive tape on the pole piece.

[0040] It should be noted that in Figure 1 , the direction indicated by arrow A is the direction from top to bottom of the frame 200, and the direction indicated by arrow B is the direction from left to right of the frame 200. And in Figure 1 , the side-by-side direction of the first rolling and pasting shaft 10 and the second rolling and pasting shaft 20 is the up-and-down direction of the frame 200.

[0041] The above-disclosed are only the preferred examples of the present invention, which are used to facilitate the understanding of those skilled in the art and to implement accordingly. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A rolling and pasting mechanism for adhesive tape, characterized in that, it includes a first rolling and pasting shaft, a second rolling and pasting shaft arranged side by side and spaced apart from the first rolling and pasting shaft, and a rolling drive for driving the first rolling and pasting shaft and the second rolling and pasting shaft to roll synchronously. A gap for the external pole piece to pass through is defined between the first rolling and pasting shaft and the second rolling and pasting shaft. The first rolling and pasting shaft and the second rolling and pasting shaft paste the adhesive tapes adsorbed by vacuum on the pole piece passing through the gap under the drive of the rolling drive; the first rolling and pasting shaft has a first arc rolling surface with the arc center on the axis of the first rolling and pasting shaft, a first back surface facing away from the first arc rolling surface, and a first intermediate connecting surface connecting the first arc rolling surface and the first back surface. The offset distance of the first arc rolling surface relative to the axis of the first rolling and pasting shaft is greater than the offset distances of the first back surface and the first intermediate connecting surface relative to the axis of the first rolling and pasting shaft; the second rolling and pasting shaft has a second arc rolling surface with the arc center on the axis of the second rolling and pasting shaft, a second back surface facing away from the second arc rolling surface, and a second intermediate connecting surface connecting the second arc rolling surface and the second back surface. The offset distance of the second arc rolling surface relative to the axis of the second rolling and pasting shaft is greater than the offset distances of the second back surface and the second intermediate connecting surface relative to the axis of the second rolling and pasting shaft.

2. The rolling and pasting mechanism for adhesive tape according to claim 1, characterized in that, the first rolling and pasting shaft has a first air flow channel, and a plurality of first openings spaced from each other and communicating with the first air flow channel are arranged on the first arc rolling surface. The second rolling and pasting shaft has a second air flow channel, and a plurality of second openings spaced apart and communicating with the second air flow channel are arranged on the second arc rolling surface; during the process of driving the first rolling and pasting shaft and the second rolling and pasting shaft to roll synchronously by the rolling drive, one of the first arc rolling surface and the second arc rolling surface rotates to the adhesive tape pasting position while the other rotates to the misaligned position misaligned with the adhesive tape pasting position.

3. The rolling and pasting mechanism for adhesive tape according to claim 2, characterized in that, a third opening communicating with the first air flow channel is formed on the first back surface.

4. The rolling and pasting mechanism for adhesive tape according to claim 2, characterized in that, a fourth opening communicating with the second air flow channel is formed on the second back surface.

5. The rolling and pasting mechanism for adhesive tape according to claim 2, characterized in that, It further includes a first mounting shaft and a second mounting shaft that are arranged side by side and spaced apart from each other. A gear and a transmission wheel are sleeved on each of the first mounting shaft and the second mounting shaft. A mating wheel aligned with the transmission wheel on the first mounting shaft is sleeved on the first axial end of the first rolling and pasting shaft. A mating wheel aligned with the transmission wheel on the second mounting shaft is sleeved on the first axial end of the second rolling and pasting shaft. The gear on the first mounting shaft and the gear on the second mounting shaft are meshed with each other. A first transmission member is wound around the transmission wheel on the first mounting shaft and the mating wheel on the first rolling and pasting shaft. A second transmission member is wound around the transmission wheel on the second mounting shaft and the mating wheel on the second rolling and pasting shaft. The output end of the rolling driver is assembled and connected to the first mounting shaft or the second mounting shaft.

6. The rolling and pasting mechanism according to claim 5, characterized in that the first air flow channel penetrates through the second axial end of the first rolling and pasting shaft, and the second air flow channel penetrates through the second axial end of the second rolling and pasting shaft.

7. A lithium battery sheet making machine, comprising a machine frame and a first tape wheel, a second tape wheel, a first glue opening mechanism, a second glue opening mechanism, a first glue pressing mechanism, a second glue pressing mechanism, a first cutting mechanism, a second cutting mechanism, a first tape pulling mechanism and a second tape pulling mechanism assembled on the machine frame, characterized in that the lithium battery sheet making machine further includes the rolling and pasting mechanism according to any one of claims 1 to 6. The rolling and pasting mechanism is assembled on the machine frame. The first tape pulling mechanism is arranged side by side with the first rolling and pasting shaft in the up and down direction of the machine frame and is located beside the first rolling and pasting shaft on the side facing away from the second rolling and pasting shaft. The second tape pulling mechanism is arranged side by side with the second rolling and pasting shaft in the up and down direction of the machine frame and is located beside the second rolling and pasting shaft on the side facing away from the first rolling and pasting shaft. The first tape pulling mechanism, the first cutting mechanism, the first glue pressing mechanism, the first glue opening mechanism and the first tape wheel are arranged in sequence corresponding to each other in the left and right direction of the machine frame. The second tape pulling mechanism, the second cutting mechanism, the second glue pressing mechanism, the second glue opening mechanism and the second tape wheel are arranged in sequence corresponding to each other in the left and right direction of the machine frame.

8. The lithium battery sheet making machine according to claim 7, characterized in that the first rolling and pasting shaft and the second rolling and pasting shaft are located on the front side of the machine frame, and the rolling driver is located on the rear side of the machine frame.

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