Sodium-ion battery pole piece rolling device

Abstract

The invention relates to the technical field of battery pole piece processing, and particularly discloses a sodium ion battery pole piece rolling device which comprises a rack, a rolling mechanism and a bearing mechanism are arranged in the rack, the bearing mechanism is located over the rolling mechanism, and the bearing mechanism is used for providing stable support for the rolling mechanism; the rolling mechanism is used for uniformly rolling the battery pole piece, a lower cleaning mechanism is arranged at the right end of the bearing mechanism, an upper cleaning mechanism is arranged right above the lower cleaning mechanism, and the upper cleaning mechanism and the lower cleaning mechanism are respectively used for cleaning the upper surface and the lower surface of the battery pole piece. According to the invention, under the mutual cooperation of the bearing mechanism and the rolling mechanism, the pole piece can be subjected to multi-stage rolling, so that the rebound phenomenon of the pole piece is effectively reduced, the problem of uneven stress possibly occurring in the compaction process of the existing rolling equipment is solved, and the battery pole piece can meet the stricter thickness uniformity requirement.

Description

Technical Field

[0001] The invention belongs to the technical field of battery pole piece processing, and in particular relates to a sodium ion battery pole piece rolling device. Background Art

[0002] With the widespread application of modern electronic devices, the performance requirements for batteries are increasing, especially the energy density and quality of batteries. The production and manufacturing process of battery pole pieces, as a key link in the battery manufacturing process, directly affects the overall performance of the battery. In the production of battery pole pieces, the compaction process after coating plays a decisive role in improving the battery energy density.

[0003] With the development of battery electrode production technology, the size of the electrode tends to be wider, and accordingly, the width of the working roller surface of the roller must also be increased; however, the rolling equipment of the prior art is prone to uneven force during the rolling process after the roller width is increased, resulting in slight deformation of the roller surface. This deformation will cause the electrode to be thicker in the middle and thinner on both sides after rolling, which is the so-called thickness inconsistency. This thickness inconsistency makes it difficult for the battery electrode to meet strict thickness uniformity standards, thereby affecting the overall quality of the battery electrode. Summary of the invention

[0004] The purpose of the present invention is to provide a sodium ion battery pole piece rolling device to solve the problem that the existing rolling equipment in the prior art is prone to uneven force during the rolling process, which in turn makes it difficult for the battery pole piece to meet strict thickness uniformity standards.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A sodium ion battery pole piece rolling device comprises a frame, wherein a rolling mechanism and a bearing mechanism are arranged inside the frame, wherein the bearing mechanism is located directly above the rolling mechanism, wherein the bearing mechanism is used to provide stable support for the rolling mechanism, wherein the rolling mechanism is used to perform uniform rolling processing on the battery pole piece, wherein a lower cleaning mechanism is arranged at the right end of the bearing mechanism, wherein an upper cleaning mechanism is arranged directly above the lower cleaning mechanism, wherein the upper cleaning mechanism and the lower cleaning mechanism are used to clean the upper surface and the lower surface of the battery pole piece, respectively.

[0007] Preferably: the bearing mechanism includes a bearing bracket and a bearing roller, the bearing bracket is vertically slidably connected inside the frame, the bearing roller is equidistantly rotatably connected inside the bearing bracket, multiple groups of bearing rollers are transmission connected via a second sprocket assembly, a hydraulic cylinder is fixedly connected inside the frame, and the output shaft end of the hydraulic cylinder is fixedly connected to the lower end of the bearing frame.

[0008] Preferably: the rolling mechanism includes a pressure roller and a fine-adjustment component, the frame is vertically slidably connected to a sliding frame, the sliding frame is equidistantly rotatably connected to a pressure roller, multiple groups of pressure rollers are connected through a first sprocket group, the spacing between the pressure roller and the load-bearing roller increases from left to right, and a fine-adjustment component is provided at the upper end of the sliding frame, and the fine-adjustment component is used to adjust the spacing between the pressure roller and the load-bearing roller.

[0009] Preferably: the fine-tuning component includes a bidirectional threaded rod and a first motor, the frame is rotatably connected with the bidirectional threaded rod inside, the front and rear ends of the bidirectional threaded rod are both connected to moving blocks by threads, the left and right ends of the two groups of moving blocks are rotatably connected with connecting rods, the end of the connecting rod away from the moving block is rotatably connected to the upper end of the sliding frame, the front end of the frame is fixedly connected with the first motor, and the output shaft end of the first motor is fixedly connected to the front end of the bidirectional threaded rod.

[0010] Preferably: the carrying roller and the pressure roller are connected via a transmission mechanism, the transmission mechanism comprises a second motor and a rotating shaft, the front end of the carrying bracket is fixedly connected to the second motor, the rear end of the carrying bracket is rotatably connected to the rotating shaft via a bearing seat, the lower end of the rotating shaft is fixedly connected to the output shaft end of the second motor, the side wall of the rotating shaft is fixedly connected to the first bevel gear, the rear end of the carrying roller located between the carrying brackets is fixedly connected to the second bevel gear, the first bevel gear and the second bevel gear are meshed with each other, the rear end of the sliding frame is rotatably connected to a sliding sleeve via the bearing seat, the side wall of the lower end of the sliding sleeve is fixedly connected to the third bevel gear, the interior of the sliding sleeve is slidably connected to the side wall of the rotating shaft, the third bevel gear and the first bevel gear are symmetrical to each other, and the rear end of the pressure roller located in the middle of the sliding frame is fixedly connected to the fourth bevel gear, and the third bevel gear and the fourth bevel gear are meshed with each other.

[0011] Preferably: the right end of the supporting bracket is fixedly connected to a fixing rod, the right end of the fixing rod is provided with a lower cleaning mechanism, the lower cleaning mechanism includes a lower bracket and a lower cleaning roller, the right end of the fixing rod is fixedly connected to the lower bracket, and the lower cleaning roller is rotatably connected to the upper inner side of the lower bracket.

[0012] Preferably: the lower bracket is internally rotatably connected with a second unwinding roller, a second winding roller and a second limiting roller, the second limiting roller is provided in two groups and is located on the left and right sides of the lower end of the lower cleaning roller, the second unwinding roller and the second winding roller are located at the lower end of the second limiting roller, the second unwinding roller is located at the left end of the second winding roller, the front end of the lower cleaning roller is connected to the front end of the second winding roller through a second pulley group, the rear end of the lower bracket is fixedly connected to a fourth motor, and the output shaft end of the fourth motor is fixedly connected to the rear end of the lower cleaning roller.

[0013] Preferably: an upper cleaning mechanism is provided inside the frame, and the upper cleaning mechanism includes a limit slide bar and an upper cleaning roller, the upper end of the frame is slidably connected to the limit slide bar, the lower end of the limit slide bar penetrates into the frame, the lower end of the limit slide bar is fixedly connected to the upper bracket, the upper cleaning roller is rotatably connected inside the lower end of the upper bracket, the side wall of the limit slide bar located inside the frame is sleeved with a spring, the upper end of the spring is fixedly connected to the inner wall of the frame, and the lower end of the spring is fixedly connected to the upper end of the upper bracket.

[0014] Preferably: the upper bracket is internally rotatably connected with a first limiting roller, a first unwinding roller and a first winding roller, the first limiting roller is provided with two groups and is located on the left and right sides of the upper end of the upper cleaning roller, the first unwinding roller and a winding roller are located at the upper end of the first limiting roller, the first unwinding roller is located at the left end of the first winding roller, the front end of the upper cleaning roller is connected to the front end of the first winding roller through a first pulley group, the rear end of the upper bracket is fixedly connected to a third motor, and the output shaft end of the third motor is fixedly connected to the rear end of the upper cleaning roller.

[0015] Preferably, the side walls of the upper cleaning roller and the lower cleaning roller are coated with a silicone coating.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention configures multiple groups of load-bearing rollers and pressure rollers, and cleverly designs the spacing between the pressure rollers and the load-bearing rollers so that the spacing gradually increases from left to right, thereby realizing step-by-step compaction of the battery pole pieces. This design effectively reduces the rebound phenomenon of the pole pieces, improves their volume density, reduces internal resistance, and ensures the consistency of the thickness of the pole pieces, thereby solving the problem of uneven force that may occur in the compaction process of the existing roller pressing equipment, and achieving the battery pole pieces being able to meet more stringent thickness uniformity requirements.

[0018] 2. The present invention uses the cooperation of the bidirectional threaded rod, the moving block, the connecting rod and the first motor in the fine-tuning component. When the motor is started, it can drive the sliding frame to move up and down in the vertical direction, so as to adapt to the rolling of pole pieces with different thicknesses. This design not only improves the adaptability of the equipment, but also ensures the accuracy and consistency of the rolling process.

[0019] 3. The present invention can effectively remove grease and dust on the electrode pre-sprayed with anhydrous ethanol through the cooperation of the upper cleaning mechanism and the lower cleaning mechanism; this cleaning method not only improves the cleanliness of the electrode, but also ensures the quality and performance of the electrode during the rolling process, thereby significantly improving the overall effect of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall rear view structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the overall main cross-sectional plan structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the explosion structure of the transmission mechanism of the present invention;

[0024] Figure 5 It is a schematic diagram of the main cross-sectional plan structure of the bearing mechanism and the rolling mechanism of the present invention;

[0025] Figure 6 It is a right side structural schematic diagram of the upper cleaning mechanism and the lower cleaning mechanism of the present invention;

[0026] Figure 7 It is a schematic diagram of the front cross-sectional plan structure of the upper cleaning mechanism and the lower cleaning mechanism of the present invention;

[0027] Figure 8 It is a schematic diagram of the front cross-sectional plan structure of the upper cleaning roller and the lower cleaning roller of the present invention.

[0028] In the figure: 1, frame; 2, rolling mechanism; 21, sliding frame; 22, fine adjustment component; 221, bidirectional threaded rod; 222, moving block; 223, connecting rod; 224, first motor; 23, pressing roller; 24, first sprocket assembly; 3, bearing mechanism; 31, bearing bracket; 32, hydraulic cylinder; 33, bearing roller; 34, second sprocket assembly; 35, fixed rod; 4, transmission mechanism; 41, rotating shaft; 42, second motor; 43, first bevel gear; 44, second bevel gear; 45, sliding sleeve ; 46. Third bevel gear; 47. Fourth bevel gear; 5. Upper cleaning mechanism; 51. Limiting slide bar; 52. Spring; 53. Upper bracket; 54. Upper cleaning roller; 55. Third motor; 56. First unwinding roller; 57. First winding roller; 58. First limiting roller; 59. First pulley group; 6. Lower cleaning mechanism; 61. Lower bracket; 62. Lower cleaning roller; 63. Fourth motor; 64. Second unwinding roller; 65. Second winding roller; 66. Second limiting roller; 67. Second pulley group; 7. Silicone coating. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0030] Reference Figure 1-Figure 8As shown, the present invention provides a sodium ion battery pole piece rolling device, comprising a frame 1, a rolling mechanism 2 and a bearing mechanism 3 are arranged inside the frame 1, the bearing mechanism 3 is located directly above the rolling mechanism 2, the bearing mechanism 3 is used to provide stable support for the rolling mechanism 2, the rolling mechanism 2 is used to perform uniform rolling processing on the battery pole piece, a lower cleaning mechanism 6 is arranged at the right end of the bearing mechanism 3, an upper cleaning mechanism 5 is arranged directly above the lower cleaning mechanism 6, the upper cleaning mechanism 5 and the lower cleaning mechanism 6 are respectively used to clean the upper surface and the lower surface of the battery pole piece; by setting the bearing mechanism 3 and the rolling mechanism With the cooperation of the upper cleaning mechanism 5 and the lower cleaning mechanism 6, the electrode sheet can be rolled in multiple stages, which effectively reduces the rebound phenomenon of the electrode sheet and solves the problem of uneven force that may occur in the compaction process of the existing rolling equipment, so that the battery electrode sheet can meet more stringent thickness uniformity requirements; before rolling, the grease and dust on the electrode sheet pre-sprayed with anhydrous ethanol can be effectively removed through the cooperation of the upper cleaning mechanism 5 and the lower cleaning mechanism 6; this cleaning method not only improves the cleanliness of the electrode sheet, but also ensures the quality and performance of the electrode sheet during the rolling process, thereby significantly improving the overall effect of the final product.

[0031] In a further embodiment, referring to Figure 1-Figure 5 The bearing mechanism 3 includes a bearing bracket 31 and a bearing roller 33. The bearing bracket 31 is vertically slidably connected inside the frame 1, and the bearing rollers 33 are equidistantly rotatably connected inside the bearing bracket 31. Multiple groups of bearing rollers 33 are transmission-connected through a second sprocket assembly 34. A hydraulic cylinder 32 is fixedly connected inside the frame 1, and the output shaft end of the hydraulic cylinder 32 is fixedly connected to the lower end of the bearing frame 1.

[0032] In this embodiment, the hydraulic cylinder 32 is started to drive the bearing bracket 31 to move upward, so that the bearing roller 33 moves to a predetermined position, thereby providing stable support for the rolling of the pole piece; when the bearing bracket 31 is moved to the lowest position by the hydraulic cylinder 32, the distance between the bearing mechanism 3 and the rolling mechanism 2 is increased, creating conditions for the initial laying of the pole piece.

[0033] In a further embodiment, referring to Figure 1-Figure 5 The rolling mechanism 2 includes a pressure roller 23 and a fine-tuning component 22. The frame 1 is vertically slidably connected to a sliding frame 21. The sliding frame 21 is equidistantly rotatably connected to the pressure roller 23. The multiple groups of pressure rollers 23 are connected by a first sprocket group. The spacing between the pressure roller 23 and the bearing roller 33 increases from left to right. The upper end of the sliding frame 21 is provided with a fine-tuning component 22, and the fine-tuning component 22 is used to adjust the spacing between the pressure roller 23 and the bearing roller 33.

[0034] In this embodiment, the sliding frame 21 is driven downward by the fine-tuning component 22, so that the sliding frame 21 moves to the specified position. At this time, the rolling effect can be driven by the rotation of the pressure roller 23. Because the distance between the pressure roller 23 and the supporting roller 33 gradually increases from left to right, the step-by-step compaction of the battery electrode is achieved. This design effectively reduces the rebound phenomenon of the electrode.

[0035] In a further embodiment, referring to Figure 4 The fine-tuning component 22 includes a bidirectional threaded rod 221 and a first motor 224. The bidirectional threaded rod 221 is rotatably connected inside the frame 1. The front and rear ends of the bidirectional threaded rod 221 are both connected to moving blocks 222 through threads. The left and right ends of the two groups of moving blocks 222 are both rotatably connected to connecting rods 223. The end of the connecting rod 223 away from the moving block 222 is rotatably connected to the upper end of the sliding frame 21. The front end of the frame 1 is fixedly connected to the first motor 224, and the output shaft end of the first motor 224 is fixedly connected to the front end of the bidirectional threaded rod 221.

[0036] In this embodiment, the bidirectional threaded rod 221 is driven to rotate by starting the first motor 224. The rotation of the bidirectional threaded rod 221 drives the moving block 222 to move toward the two ends of the bidirectional threaded rod 221. The moving moving block 222 drives the connecting rod 223 to move, thereby driving the sliding frame 21 to move up and down in the vertical direction, so as to adapt to the rolling of pole pieces of different thicknesses. This design not only improves the adaptability of the equipment, but also ensures the accuracy and consistency of the rolling process.

[0037] In a further embodiment, referring to Figure 4 The bearing roller 33 is connected to the pressure roller 23 through a transmission mechanism 4, and the transmission mechanism 4 includes a second motor 42 and a rotating shaft 41. The front end of the bearing bracket 31 is fixedly connected to the second motor 42, and the rear end of the bearing bracket 31 is rotatably connected to the rotating shaft 41 through a bearing seat. The lower end of the rotating shaft 41 is fixedly connected to the output shaft end of the second motor 42, and the side wall of the rotating shaft 41 is fixedly connected to a first bevel gear 43. The rear end of the bearing roller 33 located between the bearing brackets 31 is fixedly connected to a second bevel gear 44, and the first bevel gear 43 and the second bevel gear 44 are meshed with each other. The rear end of the sliding frame 21 is rotatably connected to a sliding sleeve 45 through a bearing seat, and the side wall of the lower end of the sliding sleeve 45 is fixedly connected to a third bevel gear 46. The interior of the sliding sleeve 45 is slidably connected to the side wall of the rotating shaft 41, and the third bevel gear 46 is symmetrical to the first bevel gear 43. The rear end of the pressure roller 23 located in the middle of the sliding frame 21 is fixedly connected to a fourth bevel gear 47, and the third bevel gear 46 and the fourth bevel gear 47 are meshed with each other.

[0038] In this embodiment, the second motor 42 is started to drive the rotating shaft 41 to rotate, and the rotation of the rotating shaft 41 drives the first bevel gear 43 to rotate, and the rotation of the first bevel gear 43 drives the second bevel gear 44 to rotate, and the rotation of the second bevel gear 44 drives the bearing roller 33 to rotate, and multiple groups of bearing rollers 33 are connected by the first sprocket assembly 24, thereby driving multiple groups of bearing rollers 33 to rotate simultaneously; when the rotating shaft 41 rotates, it drives the sliding sleeve 45 to rotate, and the rotation of the sliding sleeve 45 drives the third bevel gear 46 to rotate, and the rotation of the third bevel gear 46 drives the fourth bevel gear 47 to rotate, thereby driving the pressure roller 23 to rotate, and multiple groups of pressure rollers 23 are connected by the second sprocket assembly 34, thereby driving multiple groups of pressure rollers 23 to rotate simultaneously. Since the first bevel gear 43 and the third bevel gear 46 are symmetrical to each other, the pressure roller 23 and the bearing roller 33 rotate in opposite directions, thereby achieving the effect of rolling the pole piece.

[0039] In a further embodiment, referring to Figure 6-Figure 8 The right end of the carrying bracket 31 is fixedly connected to a fixing rod 35, and the right end of the fixing rod 35 is provided with a lower cleaning mechanism 6. The lower cleaning mechanism 6 includes a lower bracket 61 and a lower cleaning roller 62. The right end of the fixing rod 35 is fixedly connected to the lower bracket 61, and the lower cleaning roller 62 is rotatably connected inside the upper side of the lower bracket 61. The second unwinding roller 64, the second winding roller 65 and the second limiting roller 66 are rotatably connected inside the lower bracket 61. The second limiting roller 66 is provided with two groups and is located on the left and right sides of the lower end of the lower cleaning roller 62. The second unwinding roller 64 and the second winding roller 65 are located at the lower end of the second limiting roller 66, and the second unwinding roller 64 is located at the left end of the second winding roller 65. The front end of the lower cleaning roller 62 is connected to the front end of the second winding roller 65 through a second pulley group 67. The rear end of the lower bracket 61 is fixedly connected to a fourth motor 63, and the output shaft end of the fourth motor 63 is fixedly connected to the rear end of the lower cleaning roller 62.

[0040] In this embodiment, the fixing rod 35 is driven upward by moving the supporting bracket 31 upward, thereby driving the lower bracket 61 upward, and further driving the lower cleaning roller 62 upward, so that the lower cleaning roller 62 is in contact with the lower surface of the pole piece, and then the lower cleaning roller 62 is driven to rotate by starting the fourth motor 63. Since the side wall of the lower cleaning roller 62 is coated with a silicone coating 7, the lower surface of the pole piece is cleaned. While the lower cleaning roller 62 rotates, the second winding roller 65 is driven to rotate through the second pulley set 67. The rotation of the second winding roller 65 drives the non-woven fabric to be wound up. Since the non-woven fabric is in contact with the lower cleaning roller 62 through the second limiting roller 66, the wound non-woven fabric can wipe the lower cleaning roller 62. This not only cleans the lower cleaning roller 62, but also ensures its efficiency and effect in cleaning the pole piece.

[0041] In a further embodiment, referring to Figure 6-Figure 8An upper cleaning mechanism 5 is provided inside the frame 1, and the upper cleaning mechanism 5 includes a limit slide bar 51 and an upper cleaning roller 54. The upper end of the frame 1 is slidably connected to the limit slide bar 51, and the lower end of the limit slide bar 51 penetrates into the frame 1. The lower end of the limit slide bar 51 is fixedly connected to an upper bracket 53, and the lower end of the upper bracket 53 is rotatably connected to the upper cleaning roller 54. The side wall of the limit slide bar 51 located inside the frame 1 is sleeved with a spring 52, and the upper end of the spring 52 is fixedly connected to the inner wall of the frame 1, and the lower end of the spring 52 is fixedly connected to the upper end of the upper bracket 53. A first limiting roller 58, a first unwinding roller 56 and a first winding roller 57 are internally rotatably connected. Two groups of first limiting rollers 58 are provided and are located on the left and right sides of the upper end of the upper cleaning roller 54. The first unwinding roller 56 and a winding roller are located on the upper end of the first limiting roller 58. The first unwinding roller 56 is located at the left end of the first winding roller 57. The front end of the upper cleaning roller 54 is connected to the front end of the first winding roller 57 through a first pulley group 59. The rear end of the upper bracket 53 is fixedly connected to the third motor 55. The output shaft end of the third motor 55 is fixedly connected to the rear end of the upper cleaning roller 54.

[0042] In this embodiment, due to the thickness of the pole piece itself, when the upper surface of the pole piece abuts against the upper cleaning roller 54, the limiting slide bar 51 will move upward, so that the spring 52 will be compressed and shortened, so that the upper cleaning roller 54 is always in contact with the upper surface of the pole piece; then the upper cleaning roller 54 is driven to rotate by starting the third motor 55, and since the side wall of the upper cleaning roller 54 is coated with a silicone coating 7, the effect of cleaning the upper surface of the pole piece is achieved. While the upper cleaning roller 54 rotates, the first winding roller 57 is driven to rotate through the first pulley group 59, and the rotation of the first winding roller 57 drives the non-woven fabric to be wound up. Since the non-woven fabric abuts against the upper cleaning roller 54 through the first limiting roller 58, the wound non-woven fabric can wipe the upper cleaning roller 54, which not only cleans the upper cleaning roller 54, but also ensures its efficiency and effect in cleaning the pole piece.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sodium ion battery pole piece rolling device, comprising a frame (1), characterized in that: A rolling mechanism (2) and a bearing mechanism (3) are arranged inside the frame (1); the bearing mechanism (3) is located directly above the rolling mechanism (2); the bearing mechanism (3) is used to provide stable support for the rolling mechanism (2); the rolling mechanism (2) is used to perform uniform rolling processing on the battery pole piece; a lower cleaning mechanism (6) is arranged at the right end of the bearing mechanism (3); an upper cleaning mechanism (5) is arranged directly above the lower cleaning mechanism (6); the upper cleaning mechanism (5) and the lower cleaning mechanism (6) are used to clean the upper surface and the lower surface of the battery pole piece, respectively.

2. A sodium ion battery pole piece rolling device according to claim 1, characterized in that: The bearing mechanism (3) comprises a bearing bracket (31) and a bearing roller (33); the frame (1) is vertically slidably connected to the bearing bracket (31); the bearing bracket (31) is equidistantly rotatably connected to the bearing roller (33); a plurality of groups of the bearing rollers (33) are transmission-connected via a second sprocket assembly (34); a hydraulic cylinder (32) is fixedly connected to the frame (1); an output shaft end of the hydraulic cylinder (32) is fixedly connected to the lower end of the bearing frame (1).

3. A sodium ion battery pole piece rolling device according to claim 1, characterized in that: The rolling mechanism (2) comprises a pressing roller (23) and a fine-adjustment component (22); the frame (1) is vertically slidably connected to a sliding frame (21); the sliding frame (21) is equidistantly rotatably connected to a pressing roller (23); a plurality of groups of pressing rollers (23) are connected to each other through a first sprocket group; the spacing between the pressing rollers (23) and the bearing rollers (33) increases from left to right; the upper end of the sliding frame (21) is provided with a fine-adjustment component (22); the fine-adjustment component (22) is used to adjust the spacing between the pressing rollers (23) and the bearing rollers (33).

4. A sodium ion battery pole piece rolling device according to claim 3, characterized in that: The fine-tuning component (22) comprises a bidirectional threaded rod (221) and a first motor (224); the frame (1) is internally rotatably connected with the bidirectional threaded rod (221); both front and rear ends of the bidirectional threaded rod (221) are threadedly connected with moving blocks (222); both left and right ends of the two groups of moving blocks (222) are rotatably connected with connecting rods (223); one end of the connecting rod (223) away from the moving blocks (222) is rotatably connected to the upper end of the sliding frame (21); the front end of the frame (1) is fixedly connected with the first motor (224); and the output shaft end of the first motor (224) is fixedly connected to the front end of the bidirectional threaded rod (221).

5. A sodium ion battery pole piece rolling device according to claim 3, characterized in that: The bearing roller (33) and the pressure roller (23) are connected to each other through a transmission mechanism (4), wherein the transmission mechanism (4) comprises a second motor (42) and a rotating shaft (41), the front end of the bearing bracket (31) is fixedly connected to the second motor (42), the rear end of the bearing bracket (31) is rotatably connected to the rotating shaft (41) through a bearing seat, the lower end of the rotating shaft (41) is fixedly connected to the output shaft end of the second motor (42), the side wall of the rotating shaft (41) is fixedly connected to the first bevel gear (43), and the rear end of the bearing roller (33) located between the bearing brackets (31) is fixedly connected to the second bevel gear (44), the first bevel gear (43) and the second bevel gear (44) are meshed with each other, the rear end of the sliding frame (21) is rotatably connected to a sliding sleeve (45) through a bearing seat, the lower end side wall of the sliding sleeve (45) is fixedly connected to a third bevel gear (46), the interior of the sliding sleeve (45) is slidably connected to the side wall of the rotating shaft (41), the third bevel gear (46) and the first bevel gear (43) are symmetrical to each other, and the rear end of the pressure roller (23) located in the middle of the sliding frame (21) is fixedly connected to a fourth bevel gear (47), and the third bevel gear (46) and the fourth bevel gear (47) are meshed with each other.

6. A sodium ion battery pole piece rolling device according to claim 1, characterized in that: The right end of the bearing bracket (31) is fixedly connected to a fixing rod (35), and the right end of the fixing rod (35) is provided with a lower cleaning mechanism (6), and the lower cleaning mechanism (6) comprises a lower bracket (61) and a lower cleaning roller (62). The right end of the fixing rod (35) is fixedly connected to the lower bracket (61), and the upper side of the lower bracket (61) is rotatably connected to the lower cleaning roller (62).

7. A sodium ion battery pole piece rolling device according to claim 6, characterized in that: The lower bracket (61) is internally rotatably connected with a second unwinding roller (64), a second winding roller (65) and a second limiting roller (66); the second limiting roller (66) is provided in two groups and is located on the left and right sides of the lower end of the lower cleaning roller (62); the second unwinding roller (64) and the second winding roller (65) are located at the lower end of the second limiting roller (66); the second unwinding roller (64) is located at the left end of the second winding roller (65); the front end of the lower cleaning roller (62) is connected to the front end of the second winding roller (65) by transmission via a second pulley group (67); the rear end of the lower bracket (61) is fixedly connected with a fourth motor (63); the output shaft end of the fourth motor (63) is fixedly connected to the rear end of the lower cleaning roller (62).

8. A sodium ion battery pole piece rolling device according to claim 6, characterized in that: An upper cleaning mechanism (5) is arranged inside the frame (1), and the upper cleaning mechanism (5) comprises a limit slide bar (51) and an upper cleaning roller (54); the upper end of the frame (1) is slidably connected to the limit slide bar (45), the lower end of the limit slide bar (45) penetrates into the frame (1), the lower end of the limit slide bar (45) is fixedly connected to an upper bracket (53), the lower end of the upper bracket (53) is rotatably connected to the upper cleaning roller (54), and the side wall of the limit slide bar located inside the frame (1) is sleeved with a spring (52), the upper end of the spring (52) is fixedly connected to the inner wall of the frame (1), and the lower end of the spring (52) is fixedly connected to the upper end of the upper bracket (53).

9. A sodium ion battery pole piece rolling device according to claim 8, characterized in that: The upper bracket (53) is internally rotatably connected with a first limiting roller (58), a first unwinding roller (56) and a first winding roller (57); the first limiting roller (58) is provided with two groups and is located on the left and right sides of the upper end of the upper cleaning roller (54); the first unwinding roller (56) and a winding roller are located on the upper end of the first limiting roller (58); the first unwinding roller (56) is located on the left end of the first winding roller (57); the front end of the upper cleaning roller (54) is connected to the front end of the first winding roller (57) by transmission via a first pulley group (59); the rear end of the upper bracket (53) is fixedly connected with a third motor (55); the output shaft end of the third motor (55) is fixedly connected to the rear end of the upper cleaning roller (54).

10. A sodium ion battery pole piece rolling device according to claim 8, characterized in that: The side walls of the upper cleaning roller (54) and the lower cleaning roller (62) are both coated with a silicone coating (7).

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