Surface processing device for lithium ion battery positive electrode sheet

Abstract

The present application relates to the technical fields of lithium ion battery manufacturing and processing, and particularly relates to a surface processing device for lithium ion battery positive pole piece, which comprises a support frame mechanism, including a bottom frame and a support roller horizontally rotatably installed in the middle of the bottom frame, the side plates on the left and right sides of the bottom frame are both extended upward with support plates, and the upper ends of the two support plates are fixed with a limiting frame; a rotating frame mechanism is rotatably installed between the two support plates, the rotating frame mechanism comprises a middle rotating frame between the two support plates, and two rotating shafts penetrating through the two support plates and the middle rotating frame, the rear end of the middle rotating frame is fixed with a horizontal shaft one; a working roller is horizontally rotatably installed on the middle rotating frame, the working roller comprises a working roller body, and the outer surface of the working roller body is provided with an embossed edge; and a pressure control mechanism is installed on the limiting frame. The present application can emboss the surface of the battery positive pole piece, thereby improving the liquid absorption of the battery cell and then improving the cycle performance of the battery cell.

Description

Technical Field

[0001] This invention relates to the field of lithium-ion battery manufacturing and processing technology, and in particular to a surface processing device for lithium-ion battery positive electrode sheets. Background Technology

[0002] Lithium-ion batteries have a long lifespan, a key performance characteristic. During use, they undergo charging and discharging, a process that slowly depletes the electrolyte within the battery. Therefore, the amount of electrolyte is a crucial factor affecting battery lifespan. Effectively increasing the amount of lithium-ion electrolyte can improve battery performance, enhance usability, and reduce operating costs.

[0003] Currently, in the manufacturing process of lithium-ion batteries, the electrode surfaces are not processed. After rolling and stacking, the electrodes are relatively dense, resulting in poor liquid absorption. Consequently, the liquid absorption effect is unsatisfactory after cell assembly, and the cell cycle life is significantly affected by the amount of liquid absorbed. Therefore, a surface processing device for battery positive electrodes is needed to improve the liquid absorption of the cells, thereby enhancing cell cycle performance. Summary of the Invention

[0004] The purpose of this invention is to provide a surface processing device for lithium-ion battery positive electrode sheets, which can emboss the surface of the positive electrode sheet to improve the liquid absorption of the cell and thus improve the cycle performance of the cell.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A surface processing apparatus for a lithium-ion battery positive electrode sheet, comprising:

[0007] The support frame mechanism includes a bottom frame and a support roller that is laterally rotatably installed in the middle of the bottom frame. The side plates on the left and right sides of the bottom frame have support plates extending upwards, and the upper ends of the two support plates are fixed with limit frames.

[0008] A rotating frame mechanism is rotatably installed between two support plates. The rotating frame mechanism includes a central rotating frame located between the two support plates and two rotating shafts that pass through the two support plates and the central rotating frame respectively. A horizontal shaft is fixed at the rear end of the central rotating frame.

[0009] The working roller rotates laterally on the transfer frame. The working roller includes a working roller body, and the outer surface of the working roller body is provided with embossed ridges.

[0010] A pressure control mechanism is installed on a limit frame. The pressure control mechanism includes a sliding shaft frame that is arranged laterally and slides in the limit frame in the front-back direction. A telescopic power assembly is installed between the sliding shaft frame and the rear end of the limit frame. A tension spring assembly is installed between the sliding shaft frame and the horizontal shaft.

[0011] Furthermore, the tension spring assembly includes two sleeves respectively sleeved on the sliding shaft bracket and the horizontal shaft, with a tension spring fixed between the two sleeves, and an outer tube and an inner rod respectively fixed on opposite sides of the two sleeves, the inner rod sliding coaxially inside the outer tube.

[0012] Furthermore, a double horizontal plate frame is horizontally fixed at the upper end of the bottom frame, and a limit mechanism is installed on the double horizontal plate frame to restrict the rotation of the transfer frame.

[0013] Furthermore, the limiting mechanism includes

[0014] The lifting frame slides and rises within the double horizontal plate frame;

[0015] The adjusting screw is rotatably connected to the double horizontal plate frame and threadedly connected to the lifting frame;

[0016] The limiting plates are vertically fixed to the left and right ends of the lifting frame, and both protrude upwards from the double horizontal plate frame.

[0017] Furthermore, the transfer frame is provided with top blocks at both of the two limiting plates.

[0018] Furthermore, a surface processing apparatus for a lithium-ion battery positive electrode sheet also includes a buffer mechanism mounted on a double horizontal plate frame for buffering the transfer frame before it is pressed against the limiting plate. The buffer mechanism includes...

[0019] There are two sliding rods, both of which slide vertically with the double horizontal plate frame;

[0020] The buffer block is fixed to the upper end of the two slide bars;

[0021] A buffer spring is installed between the buffer block and the double horizontal plate frame.

[0022] Furthermore, a buffer cross axis is provided at the corresponding buffer block on the transfer frame, and a second cross axis is provided at the front end of the transfer frame.

[0023] Furthermore, an anti-deviation mechanism for the electrode sheet is installed at both the front and rear positions of the support roller on the bottom frame. The anti-deviation mechanism for the electrode sheet includes...

[0024] Anti-deviation rollers are installed inside the base frame and are set parallel to the support rollers;

[0025] The conical rollers are coaxially mounted on the anti-deviation rollers, and the two conical rollers on each anti-deviation roller are symmetrically arranged.

[0026] Furthermore, both ends of the bottom frame are equipped with guide rollers that rotate laterally, both ends of the anti-deviation roller are equipped with anti-deviation seats, the anti-deviation seats are limited to slide on the side of the bottom frame, and a tension spring is provided between the anti-deviation seats and the bottom frame.

[0027] Furthermore, a bidirectional screw rotates between the two anti-deviation seats at both ends of the same anti-deviation roller, and two threaded plates are symmetrically threaded on the bidirectional screw, with the two threaded plates respectively rotatably connected to the two conical wheels.

[0028] The present invention has the following beneficial effects:

[0029] As the positive electrode moves synchronously with the rotation of the working roller, the electrode undergoes roll pressing between the working roller and the support roller. This ensures a uniform overall thickness and flatness of the electrode. Furthermore, the embossing ridges on the working roller create textures of a certain depth on the electrode surface, forming uniform and interconnected capillary channels for liquid conduction between the cell layers. This results in a higher liquid absorption capacity of the positive electrode after stacking and assembly compared to electrodes without surface processing, increasing the liquid injection volume of the assembled cell and thus improving the cycle performance of the lithium-ion battery. Additionally, by controlling the extension of the telescopic power assembly, the working roller can be brought closer to the support roller to maintain embossing pressure; conversely, by controlling the retraction of the power assembly, the working roller can be moved away from the support roller, facilitating electrode replacement. Attached Figure Description

[0030] Figure 1 A schematic diagram of the structure of a surface processing device for lithium-ion battery positive electrode sheets. Figure 1 ;

[0031] Figure 2 A schematic diagram of the structure of a surface processing device for lithium-ion battery positive electrode sheets. Figure 2 ;

[0032] Figure 3 This is a cross-sectional structural schematic diagram of a surface processing device for a lithium-ion battery positive electrode sheet;

[0033] Figure 4 This is a structural schematic diagram of the support frame mechanism;

[0034] Figure 5 This is a structural diagram of the rotating frame mechanism, the work roller, and the pressure control mechanism;

[0035] Figure 6 This is a structural schematic diagram of the tension spring assembly;

[0036] Figure 7 This is a schematic diagram of the limiting mechanism;

[0037] Figure 8 This is a schematic diagram of the buffer mechanism;

[0038] Figure 9 This is a schematic diagram of the electrode anti-polarization mechanism;

[0039] Figure 10 This is a structural diagram of the conical wheel and the threaded plate.

[0040] In the picture:

[0041] Support frame mechanism 1; bottom frame 11; support roller 12; support plate 13; limiting frame 14; double horizontal plate frame 15;

[0042] 2. Transition mechanism; 21. Intermediate frame; 22. Transverse shaft 1; 23. Top block; 24. Buffer transverse shaft; 25. Transverse shaft 2; 26.

[0043] Work roll 3; work roll body 31; embossing ribs 32;

[0044] Pressure control mechanism 4; sliding frame 41; telescopic power assembly 42; tension spring assembly 43; sleeve 431; tension spring 432; outer tube 433; inner rod 434;

[0045] Limiting mechanism 5; lifting frame 51; adjusting screw 52; limiting plate 53;

[0046] Buffer mechanism 6; slide bar 61; buffer block 62; buffer spring 63;

[0047] Electrode anti-deviation mechanism 7; anti-deviation roller 71; conical wheel 72; anti-deviation seat 73; tension spring 74; double-acting screw 75; threaded plate 76. Detailed Implementation

[0048] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0049] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0050] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0051] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] Combination Figure 1-5 A surface processing apparatus for a lithium-ion battery positive electrode sheet includes a support frame mechanism 1, which includes a base frame 11 and a support roller 12 laterally rotatably mounted in the middle of the base frame 11. Support plates 13 extend upward from the side plates on both sides of the base frame 11, and limit frames 14 are fixed to the upper ends of the two support plates 13. A rotating frame mechanism 2 is rotatably mounted between the two support plates 13. The rotating frame mechanism 2 includes a central rotating frame 21 located between the two support plates 13, and two rotating shafts passing through the two support plates 13 and the central rotating frame 21 respectively. 22. A horizontal shaft 23 is fixed to the rear end of the transfer frame 21; the working roller 3 rotates laterally on the transfer frame 21. The working roller 3 includes a working roller body 31, and the outer surface of the working roller body 31 is provided with embossed ribs 32; the pressure control mechanism 4 is installed on the limiting frame 14. The pressure control mechanism 4 includes a sliding shaft frame 41 that is arranged laterally and slides in the limiting frame 14 in the front and back directions. A telescopic power assembly 42 is installed between the sliding shaft frame 41 and the rear end of the limiting frame 14, and a tension spring assembly 43 is installed between the sliding shaft frame 41 and the horizontal shaft 23.

[0053] Specifically, the base frame 11 is a rectangular frame structure, set on the ground to support the support roller 12. At the same time, through the cooperation of the support plate 13 and the two rotating shafts 22, the transfer frame 21 is supported above the base frame 11, so that the working roller 31 installed in the transfer frame 21 is located above the support roller 12. The horizontal shaft 23 is set at the rear end of the transfer frame 21, and the rotating shaft 22 is located between the horizontal shaft 23 and the working roller 31. So when the telescopic power assembly 42 extends and pushes the sliding shaft frame 41 to move forward within the limit frame 14, the tension spring assembly 43 will pull the horizontal shaft 23, so that the horizontal shaft 23 drives the transfer frame 21 to rotate around the rotating shaft 22 as the axis, thus forming the effect of the horizontal shaft 23 moving upward and the working roller 31 moving downward and approaching the support roller 12.

[0054] During actual processing, the power motor installed on the transfer frame 21 is started to drive the working roller 31, so that the rotation speed of the working roller 31 is adapted to the movement speed of the positive electrode sheet between the working roller 31 and the support roller 12, thereby ensuring that the working roller 31 cooperates with the support roller 12 to roll and emboss the positive electrode sheet; at the same time, the telescopic power assembly 42 is controlled to retract, pulling the sliding shaft frame 41 to move backward within the limit frame 14, thereby pushing the horizontal shaft 23 through the tension spring assembly 43 to drive the transfer frame 21 to rotate around the rotating shaft 22, so that the working roller 31 moves upward and separates from the support roller 12 to create a larger space, thus facilitating the feeding of the electrode sheet between the working roller 31 and the support roller 12, and then the telescopic power assembly is controlled to retract. The extension of part 42 causes the working roller 31 to press the electrode sheet onto the support roller 12. As the positive electrode sheet moves synchronously with the rotation of the working roller 31, the electrode sheet will be rolled by the working roller 31 and the support roller 12 when it passes between the working roller 31 and the support roller 12. This makes the overall thickness and flatness of the electrode sheet uniform. The embossing ribs 32 on the working roller 31 press a certain depth of texture on the surface of the electrode sheet, thereby forming uniform and interconnected capillary liquid channels between the cell layers. This makes the liquid absorption capacity of the positive electrode sheet after the lithium-ion battery is stacked and assembled to a certain extent compared with the electrode sheet without surface processing, thereby increasing the liquid injection volume of the assembled cell and improving the cycle performance of the lithium-ion battery.

[0055] The telescopic power assembly 42 can be a hydraulic cylinder or an electric telescopic rod, which provides power for the sliding frame 41 to move back and forth within the limit frame 14, and automatically controls the approach or separation of the working roller body 31 and the support roller 12.

[0056] Combination Figure 6 In some embodiments, the tension spring assembly 43 includes two sleeves 431 respectively sleeved on the slide frame 41 and the horizontal shaft 23, a tension spring 432 fixed between the two sleeves 431, an outer tube 433 and an inner rod 434 respectively fixed on opposite sides of the two sleeves 431, and the inner rod 434 sliding coaxially inside the outer tube 433.

[0057] Specifically, the sliding frame 41 consists of a shaft and two sliders. The two sliders are fixed to both ends of the shaft and slide against the side plates of the limiting frame 14, thus allowing the shaft to be laterally positioned within the limiting frame 14 and able to move back and forth. The two sleeves 431 of the tension spring assembly 43 are respectively fitted onto the shaft and the horizontal shaft 23. The two ends of the tension spring 432 are fixed to the two sleeves 431, so that when the telescopic power assembly 42 pushes the shaft forward within the limiting frame 14, it can drive the other sleeve 431, thereby causing the horizontal shaft 23 to drive the transfer frame 21 to rotate. After the working roller body 31 presses the electrode plate onto the support roller 12, it moves forward. As the telescopic power assembly 42 continues to extend, the transfer frame 21 cannot rotate, and the distance between the shaft and the horizontal shaft 23 gradually increases, thereby stretching the tension spring 432. The deformation of the tension spring 432 generates a large elastic force, which acts on the transfer frame 21, thereby increasing the pressure of the working roller body 31 pressing against the support roller 12. Thus, by controlling the extension and retraction of the telescopic power assembly 42, the pressure on the electrode sheet can be adjusted. At the same time, since the pressure is generated by the elastic deformation of the tension spring 432, the working roller body 31 automatically has a buffering effect when pressing the electrode sheet. Compared with the rigid structure control of the working roller body 31 pressing the electrode sheet, it can protect the processing device.

[0058] One end of the outer tube 433 is fixed to one of the sleeves 431, and one end of the inner rod 434 is fixed to the other sleeve 431. The coaxial fit between the outer tube 433 and the inner rod 434 ensures that the tension spring 432 will not tilt. Moreover, when the telescopic power assembly 42 retracts to the point where the outer tube 433 presses against the other sleeve 431, the distance between the two sleeves 431 will not decrease. As the telescopic power assembly 42 continues to retract, the shaft will push the horizontal shaft 23 through the tension spring assembly 43, which in turn will push the intermediate frame 21 to rotate, causing the working roller 31 to separate from the support roller 12. This forms an automatic control for the separation of the working roller 31 from the support roller 12.

[0059] Combination Figure 1 and Figure 4 In some embodiments, a double horizontal plate frame 15 is horizontally fixed at the upper end of the bottom frame 11, and a limit mechanism 5 is installed on the double horizontal plate frame 15 to limit the rotation of the transfer frame 21.

[0060] Specifically, the double horizontal plate frame 15 is a frame with upper and lower horizontal plates. There is a certain gap between the upper plate and the lower plate. The limiting mechanism 5 is installed on the lower plate and passes through the upper plate to support and limit the transfer frame 21, restricting the transfer frame 21 from carrying the working roller 31 to approach the support roller 12. This keeps the gap between the working roller 31 and the support roller 12 constant and does not change with the increase or decrease of pressure, ensuring the embossing depth and avoiding damage to the electrode sheet caused by excessive pressure.

[0061] Combination Figure 4 and Figure 7In some embodiments, the limiting mechanism 5 includes a lifting frame 51 that slides up and down within the double horizontal plate frame 15; an adjusting screw 52 that is rotatably connected to the double horizontal plate frame 15 and threadedly connected to the lifting frame 51; and a limiting plate 53 that is vertically fixed at the left and right ends of the lifting frame 51 and protrudes upward from the double horizontal plate frame 15.

[0062] Specifically, the lifting frame 51 is located between the upper and lower horizontal plates and is limited by the side plates of the upper and lower horizontal plates. The two limiting plates 53 penetrate the upper horizontal plate. When the transfer frame 21 carries the working roller body 31 to extrude the electrode sheet, the upper ends of the two limiting plates 53 contact and press against the side plates of the transfer frame 21 to form a limit and ensure the embossing depth.

[0063] In actual use, due to the frequent rotation of the transfer frame 21 when changing electrode sheets, the working roller 31 separates from the support roller 12. When the transfer frame 21 is rotated under control, it will collide with the upper ends of the two limit plates 53. With the increase of the number of collisions, the limit plates 53 and the transfer frame 21 will experience different degrees of wear, which will affect the gap between the working roller 31 and the support roller 12, and consequently affect the embossing depth. Therefore, an adjusting screw 52 is set. By rotating the adjusting screw 52 and connecting it with the lifting frame 51 through the threaded engagement, the lifting frame 51 can be raised and lowered, thereby adjusting the raising and lowering of the two limit plates 53. This eliminates the embossing depth error caused by the wear between the limit plates 53 and the transfer frame 21. At the same time, the adjusting screw 52 can also control the working roller 31 and the support roller 12 to form different sizes of gaps, so that the processing device can adapt to different materials and different depths of embossing processing.

[0064] Preferably, in some embodiments, the transfer frame 21 is provided with a top block 24 at each of the two limiting plates 53.

[0065] By setting top blocks 24 at the two limit plates 53 on the transfer frame 21, the collision resistance of the transfer frame 21 is improved and the wear caused by the collision is reduced.

[0066] Combination Figure 4 , Figure 5 and Figure 8 In some embodiments, a surface processing device for a lithium-ion battery positive electrode sheet further includes a buffer mechanism 6 mounted on a double horizontal plate frame 15 for buffering the transfer frame 21 before it is pressed against the limiting plate 53. The buffer mechanism 6 includes two slide rods 61, both of which slide vertically with the double horizontal plate frame 15; a buffer block 62 is fixed at the upper end of the two slide rods 61; and a buffer spring 63 is disposed between the buffer block 62 and the double horizontal plate frame 15.

[0067] Because the replacement of the electrode sheet causes frequent collisions between the transfer frame 21 and the limiting plate 53, the transfer frame 21 and the limiting plate 53 are worn, which in turn leads to changes in the embossing depth. In order to reduce the collision force between the transfer frame 21 and the limiting plate 53 and reduce the collision wear between the two, a buffer mechanism 6 is set up.

[0068] Specifically, the slide bar 61 slides through the upper horizontal plate of the double horizontal plate frame 15 and is set between the buffer block 62 and the upper horizontal plate by a buffer spring 63, forming an elastic support for the buffer block 62. When the transfer frame 21 rotates towards the limiting plate 53, the buffer block 62 first contacts the transfer frame 21, so that the transfer frame 21 first impacts the buffer block 62. Then, as the buffer block 62 compresses the buffer spring 63, the transfer frame 21 compresses the buffer block 62 and slowly descends elastically, and then contacts the limiting plate 53. Thus, the impact force of the transfer frame 21 on the limiting plate 53 is greatly eliminated, and the wear caused by the impact between the transfer frame 21 and the limiting plate 53 is greatly reduced.

[0069] Combination Figure 5 In some embodiments, a buffer horizontal axis 25 is provided on the transfer frame 21 at the corresponding buffer block 62, and a horizontal axis 26 is provided at the front end of the transfer frame 21.

[0070] Specifically, by setting the buffer horizontal axis 25, it can form a correspondence with the buffer block 62, so that the transfer frame 21 impacts the buffer block 62 through the buffer horizontal axis 25. In space, the buffer block 62 is located in the middle of the two limiting plates 53, and the buffer horizontal axis 25 is located between the two top blocks 24. Thus, under the premise that the buffer block 62 and the buffer horizontal axis 25 do not interfere with the transfer frame 21 pressing against the limiting plate 53, the space of the processing device is efficiently utilized, and the overall structure of the processing device is kept compact.

[0071] Meanwhile, in order to prevent the buffer block 62 from colliding with the buffer horizontal axis 25 and to support the transfer frame 21 with the limiting plate 53, the second horizontal axis 26 is set at the front end of the transfer frame 21 to avoid external interference. This provides protection for the limiting and buffering while also making it easy to manually operate the second horizontal axis 26 to control the rotation of the transfer frame 21.

[0072] Combination Figure 1 , Figure 4 and Figure 9 In some embodiments, an anti-deviation mechanism 7 is installed at both the front and rear positions of the support roller 12 on the bottom frame 11. The anti-deviation mechanism 7 includes an anti-deviation roller 71 installed inside the bottom frame 11 and arranged parallel to the support roller 12; and a conical wheel 72 coaxially mounted on the anti-deviation roller 71, with two conical wheels 72 symmetrically arranged on each anti-deviation roller 71.

[0073] Specifically, two anti-deviation rollers 71 are respectively arranged in the front and rear directions of the support roller 12 and are parallel to the working roller body 31. Thus, during operation, the electrode sheet first passes through the front anti-deviation roller 71, then moves to the support roller 12, is rolled, and then moves to the rear anti-deviation roller 71. Each anti-deviation roller 71 is symmetrically provided with two conical wheels 72, and the conical surfaces of the two conical wheels 72 are arranged opposite each other. When the electrode sheet on the anti-deviation roller 71 deviates, the conical surface of the conical wheel 72 will automatically guide the electrode sheet back to the correct position, effectively preventing the electrode sheet from deviating. Moreover, by setting anti-deviation rollers 71 in both the front and rear directions of the support roller 12, it is further ensured that the electrode sheet is in a positive and non-deviation state when passing through the support roller 12, thus ensuring the embossing effect.

[0074] Combination Figure 4 and Figure 9 In some embodiments, guide rollers 17 are rotatably mounted on both the front and rear ends of the bottom frame 11, and anti-deviation seats 73 are rotatably mounted on both ends of the anti-deviation roller 71. The anti-deviation seats 73 are limited to slide on the side of the bottom frame 11, and a tension spring 74 is provided between the anti-deviation seats 73 and the bottom frame 11.

[0075] Since the electrode sheet needs to be under tension to achieve automatic guidance and correction through the conical wheel 72, the electrode sheet needs to be kept under tension by the processing device. Therefore, two additional guide rollers 17 are set up so that the electrode sheet passes through the processing device via the path from the upper end of the front guide roller 17, the lower end of the front anti-deviation roller 71, the upper end of the support roller 12, the lower end of the rear anti-deviation roller 71, and the upper end of the rear guide roller 17. Then, by controlling the two anti-deviation rollers 71 to move downward in parallel, the electrode sheet can be tensioned to ensure the correction effect.

[0076] Specifically, through holes are provided on the left and right side plates of the base frame 11 for the anti-deviation seat 73 to slide up and down. The upper end of the anti-deviation seat 73 is used for the rotational installation of the anti-deviation roller 71. The lower end of the anti-deviation seat 73 is provided with two vertical smooth rods for sliding through the horizontally arranged strips on the outer side of the base frame 11, thereby limiting the anti-deviation seat 73 so that the anti-deviation seat 73 can only move up and down, thereby driving the anti-deviation roller 71 to move up and down. At the same time, the tension spring 74 is fixed to the lower end of the smooth rod and pressed against the lower end face of the strip. Using the elastic force of the tension spring 74, the anti-deviation seat 73 can be pushed down, thereby driving the anti-deviation roller 71 to move down horizontally, thereby forming tension on the electrode sheet.

[0077] Combination Figure 9-10 In some embodiments, a bidirectional screw 75 rotates between two anti-deviation seats 73 at both ends of the same anti-deviation roller 71. Two threaded plates 76 are symmetrically threaded onto the bidirectional screw 75, and the two threaded plates 76 are rotatably connected to two conical wheels 72 respectively.

[0078] Specifically, the bidirectional screw 75 is provided with threads in opposite directions. Rotating the bidirectional screw 75 can drive the two threaded plates 76 to move closer or further away synchronously through the threaded engagement, thereby driving the two conical wheels 72 to move closer or further away synchronously on the anti-deviation roller 71, thus adapting to the deviation correction of electrode sheets of different widths.

[0079] Among them, the conical wheel 72 has a circular sleeve extending coaxially with the opposite side of the conical surface. The circular sleeve is rotatably mounted on the threaded plate 76, so that the threaded plate 76 can drive the conical wheel 72 to move on the anti-deviation roller 71.

[0080] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A surface processing apparatus for a lithium-ion battery positive electrode sheet, characterized in that, include The support frame mechanism (1) includes a bottom frame (11) and a support roller (12) that is laterally rotatably installed in the middle of the bottom frame (11). The side plates on the left and right sides of the bottom frame (11) are all extended upward with support plates (13). The upper ends of the two support plates (13) are fixed with limit frames (14). The rotating frame mechanism (2) is rotatably installed between two support plates (13). The rotating frame mechanism (2) includes a central rotating frame (21) located between the two support plates (13) and two rotating shafts (22) passing through the two support plates (13) and the central rotating frame (21) respectively. A horizontal shaft (23) is fixed at the rear end of the central rotating frame (21). The working roller (3) rotates laterally on the transfer frame (21). The working roller (3) includes a working roller body (31), and the outer surface of the working roller body (31) is provided with embossed ribs (32). The pressure control mechanism (4) is installed on the limit frame (14). The pressure control mechanism (4) includes a sliding shaft frame (41) that is arranged laterally and slides in the limit frame (14) in the front and back directions. A telescopic power assembly (42) is installed between the sliding shaft frame (41) and the rear end of the limit frame (14). A tension spring assembly (43) is installed between the sliding shaft frame (41) and the horizontal shaft (23).

2. The surface processing apparatus for a lithium-ion battery positive electrode sheet according to claim 1, characterized in that, The tension spring assembly (43) includes two sleeves (431) respectively mounted on the slide frame (41) and the horizontal shaft (23), a tension spring (432) is fixed between the two sleeves (431), an outer tube (433) and an inner rod (434) are fixed on opposite sides of the two sleeves (431), and the inner rod (434) slides coaxially inside the outer tube (433).

3. The surface processing apparatus for a lithium-ion battery positive electrode sheet according to claim 1, characterized in that, The upper end of the bottom frame (11) is horizontally fixed with a double horizontal plate frame (15), and a limit mechanism (5) is installed on the double horizontal plate frame (15) to limit the rotation of the transfer frame (21).

4. The surface processing apparatus for a lithium-ion battery positive electrode sheet according to claim 3, characterized in that, The limiting mechanism (5) includes The lifting frame (51) slides and rises within the double horizontal plate frame (15); The adjusting screw (52) is rotatably connected to the double horizontal plate frame (15) and threadedly connected to the lifting frame (51); The limiting plate (53) is vertically fixed to the left and right ends of the lifting frame (51), and both protrude upward from the double horizontal plate frame (15).

5. The surface processing apparatus for a lithium-ion battery positive electrode sheet according to claim 4, characterized in that, The transfer frame (21) is provided with a top block (24) at each of the two limiting plates (53).

6. The surface processing apparatus for a lithium-ion battery positive electrode sheet according to claim 4, characterized in that, It also includes a buffer mechanism (6) mounted on the double horizontal plate frame (15) for buffering the transfer frame (21) before it is pressed against the limiting plate (53). The buffer mechanism (6) includes... There are two slide rods (61), and both slide rods (61) slide vertically with the double horizontal plate frame (15); The buffer block (62) is fixed to the upper end of the two slide bars (61); A buffer spring (63) is disposed between the buffer block (62) and the double cross plate frame (15).

7. The surface processing apparatus for a lithium-ion battery positive electrode sheet according to claim 6, characterized in that, The transfer frame (21) is provided with a buffer horizontal axis (25) at the corresponding buffer block (62), and the front end of the transfer frame (21) is provided with a horizontal axis two (26).

8. The surface processing apparatus for a lithium-ion battery positive electrode sheet according to claim 1, characterized in that, Electrode anti-deviation mechanisms (7) are installed at both the front and rear positions of the support roller (12) on the bottom frame (11). The electrode anti-deviation mechanism (7) includes... Anti-deviation roller (71) is installed inside the bottom frame (11) and is set parallel to the support roller (12); The conical wheel (72) is coaxially mounted on the anti-deviation roller (71), and the two conical wheels (72) on each anti-deviation roller (71) are symmetrically arranged.

9. The surface processing apparatus for a lithium-ion battery positive electrode sheet according to claim 8, characterized in that, The bottom frame (11) has guide rollers (17) that rotate laterally at both ends. The anti-deviation roller (71) has anti-deviation seats (73) that rotate at both ends. The anti-deviation seats (73) slide on the side of the bottom frame (11) and a tension spring (74) is provided between the anti-deviation seats (73) and the bottom frame (11).

10. The surface processing apparatus for a lithium-ion battery positive electrode sheet according to claim 9, characterized in that, A bidirectional screw (75) rotates between two anti-deviation seats (73) at both ends of the same anti-deviation roller (71). Two threaded plates (76) are symmetrically threaded on the bidirectional screw (75), and the two threaded plates (76) are rotatably connected to two conical wheels (72) respectively.

Images