A lithium battery pole piece rolling and slitting machine

Abstract

The present disclosure relates to the technical field of battery pole piece processing. The present disclosure provides a rolling and slitting integrated machine for lithium battery pole pieces, which includes a frame, a roller rotatably arranged on the frame, an extrusion roller arranged on one side of the roller, a rolling space formed between the extrusion roller and the roller, and the rolling space is used for the passage of lithium battery pole pieces. The extrusion roller has two mounting grooves arranged along the axial direction of the extrusion roller, and anti-wrinkle sheets are slidably arranged in the mounting grooves. There are two anti-wrinkle sheets, and when the anti-wrinkle sheets are configured to contact the lithium battery pole piece, the two anti-wrinkle sheets can slide from the middle of the extrusion roller toward the two ends of the extrusion roller, and the slitting roller is arranged on one side of the rolling space outlet. The above technical solution solves the technical problem in the prior art of battery pole piece rolling processing that wrinkles easily occur at the end at the beginning of rolling, causing damage to the pole piece.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of battery pole piece processing, and in particular, to a rolling and slitting machine for lithium battery pole pieces. Background Art

[0002] In the field of lithium-ion battery production, the processing quality of lithium-ion battery pole pieces has a crucial impact on the performance and service life of lithium-ion batteries. However, traditional lithium-ion battery pole piece processing equipment has many problems in actual application and cannot meet the requirements of modern lithium-ion battery production for efficient and high-quality processing.

[0003] During the rolling process, the pole pieces are prone to wrinkling due to uneven force and poor equipment stability. Wrinkles not only affect the appearance of the pole pieces but can also lead to uneven internal structure, thus affecting the charge and discharge performance and service life of the lithium battery. The tightening of the separator during the threading process is particularly prone to wrinkling, and conventional equipment lacks effective anti-wrinkle measures, making it difficult to address this issue in a timely manner.

[0004] Traditional lithium battery pole piece processing equipment usually separates the rolling and slitting processes, which need to be completed separately on different equipment. This not only increases the time and workload of transferring and reinstalling pole pieces between equipment, but also easily causes errors during the process conversion process, affecting the processing accuracy of the pole pieces. When processing lithium battery pole pieces, the pole pieces need to be installed on the separator. The pole pieces are driven by the separator into the rolling position. At this time, the separator has wrinkled, which causes the battery pole pieces to wrinkle and the pole pieces to fail. Moreover, this separate processing method leads to cumbersome production processes and low production efficiency, which cannot meet the needs of modern lithium battery large-scale production. Summary of the Invention

[0005] To overcome the above-mentioned defects, the embodiments of the present disclosure provide a rolling and slitting machine for lithium battery pole pieces, which solves the technical problem in the prior art that when rolling the battery pole pieces, wrinkles are easily generated at the end at the beginning of rolling, causing damage to the pole pieces.

[0006] According to one aspect, at least one embodiment of the present disclosure provides a rolling and slitting machine for lithium battery pole pieces, comprising:

[0007] frame;

[0008] A roller, the roller being rotatably arranged on the frame;

[0009] A squeezing roller, the squeezing roller being arranged on one side of the supporting roller, forming a rolling space between the squeezing roller and the supporting roller, the rolling space being used for the passage of lithium battery pole pieces, the squeezing roller having two mounting grooves, arranged along the axial direction of the squeezing roller;

[0010] An anti-wrinkle sheet is slidably disposed in the mounting groove. There are two anti-wrinkle sheets. When the anti-wrinkle sheets are in contact with the lithium battery electrode, the two anti-wrinkle sheets can slide from the middle of the squeezing roller toward the two ends of the squeezing roller;

[0011] A slitting roller is arranged at one side of the exit of the rolling space.

[0012] In some examples, the bottom of the mounting groove has a guide surface for sliding guidance of the anti-wrinkle sheet, the bottom of the anti-wrinkle sheet abuts against the guide surface, the end of the anti-wrinkle sheet has an arc-shaped surface, the arc-shaped surface is used to abut against the lithium battery electrode membrane, and the curvature of the arc-shaped surface is the same as the curvature of the extrusion roller.

[0013] In some examples, the anti-wrinkle sheet has an abutment portion, the arcuate surface is located at an end of the abutment portion, and the abutment portion is configured so that after the abutment portion slides into the mounting groove, the arcuate surface and the outer surface of the squeezing roller form a smooth arc surface.

[0014] In some examples, the anti-wrinkle sheet has a mounting hole, and the squeezing roller includes:

[0015] A roller body, the roller body being rotatably disposed on the frame, the roller body having the mounting groove;

[0016] a sliding member, the sliding member being slidably disposed on a side wall of the mounting groove, the sliding direction of the sliding member being parallel to the guide surface, and the sliding member passing through the mounting hole;

[0017] An elastic member provides a force for the sliding member to drive the anti-wrinkle sheet to slide out of the installation slot.

[0018] In some examples, the mounting groove has an arc-shaped yielding section and a depth section, the depth section has the guide surface, there are two arc-shaped yielding sections, which are symmetrically arranged along the depth section, and the anti-wrinkle sheet includes:

[0019] A main body, the main body is slidably disposed in the depth section, the main body having two card slots, and the card slots are respectively located on both sides of the main body;

[0020] The lateral support portion comprises a clamping portion and the abutting portion, the clamping portion is clamped in the clamping slot, and the main body and the upper end surface of the lateral support portion form the arc surface.

[0021] In some examples, the length of the main body is less than the depth of the depth section, and the side wall of the mounting groove has a give-way bevel groove, and the sliding member slides into or out of the give-way bevel groove after sliding, and the give-way bevel groove is used to enable the sliding member to slide into or out of the mounting hole after sliding into the give-way bevel groove.

[0022] In some examples, the slitting rollers include:

[0023] A main roller, the main roller being rotatably arranged on one side of the squeeze roller outlet;

[0024] Slitting knives, wherein the slitting knives are arranged in a plurality along the axis of the slitting roller;

[0025] A guide member is provided on the slitting roller. There are two guide members, one on each side of the slitting roller, for guiding the lithium battery electrode membrane before slitting.

[0026] In some examples, the lithium battery pole sheet rolling and slitting machine further includes:

[0027] There are several receiving rollers, all of which are rotatably arranged on the discharge side of the slitting roller group and are used for winding the lithium battery pole pieces after slitting.

[0028] In some examples, the lithium battery pole sheet rolling and slitting machine further includes:

[0029] A guide roller group is arranged between the slitting roller and the receiving roller, and is used to guide the lithium battery pole film cut by the slitting roller to different receiving rollers.

[0030] For example, at least one embodiment of the present disclosure provides a roller-pressing and slitting machine for lithium battery pole pieces, wherein there are at least two mounting grooves, two mounting grooves parallel to the axial direction of the extrusion roller form a group, and several groups of mounting grooves are arranged along the circumference of the extrusion roller.

[0031] The beneficial effects of the embodiments of the present disclosure are:

[0032] In the present disclosure, the anti-wrinkle sheet is slidingly arranged in the mounting groove of the extrusion roller, and when the anti-wrinkle sheet contacts the lithium battery electrode sheet, the two anti-wrinkle sheets slide in the direction away from each other. This design can flexibly adjust the position of the anti-wrinkle sheet according to the actual situation of the electrode sheet, and effectively prevent the lithium battery electrode sheet from wrinkling during the rolling process. In the traditional rolling process, the electrode sheet is prone to wrinkles due to uneven force and other reasons, which affects the quality of the electrode sheet and subsequent use. In particular, when the lithium battery electrode sheet is threaded on the rolling and slitting machine, the isolation membrane is often passed through, and then the isolation membrane is tightened, and the lithium battery electrode sheet on the isolation membrane is sent to the slitting part of the roller press. The isolation membrane often wrinkles during the tightening process. At this time, the flatness of the isolation membrane is adjusted by changing the position of the anti-wrinkle sheet, thereby preventing the lithium battery electrode membrane from wrinkling during rolling. A rolling space is formed between the supporting roller and the squeezing roller. With the cooperation of the mounting grooves and the anti-wrinkle sheets arranged circumferentially on the squeezing roller, the lithium battery pole pieces can be combed by the anti-wrinkle sheets before entering the rolling space. After being combed without wrinkles, they enter the rolling space, so that the flatness of the lithium battery pole pieces entering the rolling space can be guaranteed. By ensuring the flatness of the lithium battery pole pieces when entering the rolling space, the force during the rolling process of the lithium battery pole pieces can be guaranteed to be more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly describes the drawings required for use in describing the embodiments of the present disclosure. Obviously, the drawings described below are merely some exemplary embodiments of the present disclosure. Those skilled in the art can, without inventive effort, derive other drawings based on the content of the exemplary embodiments of the present disclosure and these drawings.

[0034] Figure 1 This is a schematic structural diagram of an embodiment of the present disclosure;

[0035] Figure 2 Schematic diagram of the structure of the squeezing roller in the present disclosure;

[0036] Figure 3 A schematic cross-sectional view of the support roller and the squeeze roller in the present disclosure from one perspective;

[0037] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of A;

[0038] Figure 5 for Figure 3 Schematic diagram of the middle part structure;

[0039] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of B;

[0040] Figure 7This is a schematic cross-sectional view of the supporting roller and the squeezing roller in the present disclosure from another perspective;

[0041] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of C in the middle;

[0042] In the figure: frame 1, roller 2, squeezing roller 3, rolling space 301, mounting groove 302, guide surface 303, roller body 305, sliding member 306, elastic member 307, arc-shaped give way section 308, depth section 309, give way inclined groove 310, anti-wrinkle sheet 4, arc-shaped surface 401, mounting hole 402, main body 403, card slot 404, lateral support part 405, card part 406, abutment part 407, slitting roller 5, main roller 501, slitting knife 502, guide member 503, receiving roller 6, guide roller group 7. DETAILED DESCRIPTION

[0043] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than to limit the present disclosure.

[0044] To simplify the drawings, only the parts relevant to the disclosure are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0045] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0046] In the present disclosure, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present disclosure.

[0048] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0049] like Figures 1 to 7 As shown, it shows a rolling and slitting machine for lithium battery pole pieces in one embodiment of the present disclosure.

[0050] In some examples, such as Figures 1 to 5As shown, the anti-wrinkle sheet 4 is slidably arranged in the mounting groove 302 of the squeezing roller 3, and when the anti-wrinkle sheet 4 contacts the lithium battery electrode, the two anti-wrinkle sheets 4 arranged in the corresponding mounting groove 302 slide in the direction from the middle to the end of the squeezing roller 3. This design can flexibly adjust the position of the anti-wrinkle sheet 4 according to the actual situation of the electrode, and effectively prevent the lithium battery electrode from wrinkling during the rolling process. In the traditional rolling process, the electrode is prone to wrinkles due to uneven force and other reasons, which affects the quality of the electrode and subsequent use. In particular, when the lithium battery electrode is threaded on the rolling and slitting machine, the isolation membrane is often passed through, and then the isolation membrane is tightened, and the lithium battery electrode on the isolation membrane is sent to the slitting part of the roller press. The isolation membrane often wrinkles during the tightening process. By changing the position of the anti-wrinkle sheet 4, the flatness of the isolation membrane is adjusted, thereby preventing the lithium battery electrode membrane from wrinkling during rolling. A rolling space 301 is formed between the supporting roller 2 and the squeezing roller 3. With the cooperation of the mounting grooves 302 arranged circumferentially on the squeezing roller 3 and the anti-wrinkle sheet 4, the lithium battery pole pieces can be combed by the anti-wrinkle sheet 4 before entering the rolling space 301. After being combed without wrinkles, they enter the rolling space 301, so that the flatness of the lithium battery pole pieces entering the rolling space 301 can be guaranteed. By ensuring the flatness of the lithium battery pole pieces when entering the rolling space 301, it is ensured that the force is more uniform during the rolling process of the lithium battery pole pieces.

[0051] The design of the anti-wrinkle sheet 4 slidingly arranged in the installation groove 302 makes the installation and adjustment of the anti-wrinkle sheet 4 relatively simple. The operator only needs to put the anti-wrinkle sheet 4 into the installation groove 302 to complete the installation, and can easily adjust the position of the anti-wrinkle sheet 4 in the installation groove 302 according to the different specifications and requirements of the pole piece. The roller 2 is rotatably set on the frame 1, and the extrusion roller 3 is set on one side of the roller 2. This structural design ensures the stability of the rolling process. During the rolling process, the roller 2 and the extrusion roller 3 can stably apply pressure to the pole piece to prevent the pole piece processing quality from being reduced due to shaking or instability of the equipment. The slitting roller 5 is set on the outlet side of the extrusion roller 3, and can accurately cut the lithium battery pole piece after rolling.

[0052] This all-in-one machine integrates the rolling and slitting processes, enabling continuous processing of lithium battery electrodes. Operators simply place the electrode between the support roller 2 and the squeeze roller 3. After rolling, the electrode is directly cut by the slitting roller 5, eliminating the need to transfer and reinstall the electrode between different equipment.

[0053] In some examples, such as Figures 2 to 5As shown, several guide surfaces 303 at the bottom of the mounting slot 302 provide precise sliding guidance for the anti-wrinkle sheet 4. As the lithium battery electrode passes through the rolling space 301, guided by the guide surfaces 303, the anti-wrinkle sheet 4 accurately adjusts its position to suit the electrode's shape and stress conditions. Compared to a case without the guide surfaces 303, the anti-wrinkle sheet 4 experiences less sliding deviation, thereby more effectively preventing electrode wrinkling.

[0054] In some examples, such as Figures 2 to 6 As shown, after the anti-wrinkle sheet 4 slides, the abutment portion 407 slides into the mounting groove 302, and the arc surface 401 forms a smooth arc surface with the outer surface of the extrusion roller 3. This smooth arc surface can prevent the lithium battery pole piece from being scratched or wrinkled due to the uneven surface during the rolling process. Since the arc surface 401 forms a smooth arc surface with the outer surface of the extrusion roller 3, the force on the pole piece during rolling is more reasonable. The anti-wrinkle sheet 4 can better disperse the pressure and avoid deformation or damage caused by excessive local force on the pole piece. The smooth surface formed after rolling makes it smoother for the pole piece to enter the slitting roller 5 for slitting. The smooth surface reduces the jitter or offset caused by the uneven surface of the pole piece during slitting, thereby improving the accuracy and quality of slitting.

[0055] The mounting groove 302 provides a clear sliding path and positioning space for the abutment portion 407 of the anti-wrinkle sheet 4. During the rolling process, the anti-wrinkle sheet 4 can slide stably along the mounting groove 302, preventing it from shaking or shifting. Furthermore, the smooth curved surface structure reduces friction and impact between the anti-wrinkle sheet 4 and the squeezing roller 3. During operation, the force between the anti-wrinkle sheet 4 and the squeezing roller 3 is more uniform, reducing component wear.

[0056] In some examples, such as Figures 3 to 6 As shown, the mounting hole 402 of the anti-wrinkle sheet 4 cooperates with the sliding member 306 of the squeezing roller 3, and the elastic member 307 provides a force for the sliding member 306 to return. This allows the anti-wrinkle sheet 4 to flatten the electrode sheet upon contact with the electrode sheet, and completes the flattening of the electrode sheet before the electrode sheet enters the rolling space 301, thereby preventing the electrode sheet from wrinkling during rolling. The elastic force of the elastic member 307 ensures that a single anti-wrinkle sheet 4 can be reset after completing the rolling of the electrode sheet. By using multiple groups of anti-wrinkle sheets 4, damage caused by local deformation of the electrode sheet due to rolling can be avoided.

[0057] The wrinkle-resistant lithium battery electrode sheets, with their improved flatness and thickness uniformity, provide an excellent foundation for precise slitting by the slitting roller 5. During the slitting process, the electrode sheets are less likely to wobble or shift, allowing the slitting roller 5 to more accurately slit them to the desired size. The restoring force provided by the elastic member 307 ensures that the wrinkle-resistant sheet 4 is promptly reset after the electrode sheet passes through, thus ensuring a smooth and flat electrode sheet.

[0058] The matching arrangement of mounting holes 402 of the anti-wrinkle sheet 4 and the sliding member 306 makes installation of the anti-wrinkle sheet 4 relatively simple. The operator simply aligns the mounting holes 402 of the anti-wrinkle sheet 4 with the sliding member 306 and inserts it to complete the installation. Furthermore, during the equipment commissioning phase, the operating state of the anti-wrinkle sheet 4 can be easily adjusted by adjusting parameters such as the preload force of the elastic member 307.

[0059] The mounting holes 402, the sliding member 306, and the elastic member 307 are relatively independent, making them easy to inspect, repair, and replace. If a component becomes damaged or worn, the operator can easily remove it for repair or replace it with a new one without having to disassemble the entire device.

[0060] In some examples, such as Figures 2 to 8 As shown, the arc-shaped clearance section 308 and the depth section 309 of the mounting groove 302 are designed to cooperate with the main body 403 and the lateral support portion 405 of the anti-wrinkle sheet 4, so that the anti-wrinkle sheet 4 can fit the lithium battery pole piece more accurately. The main body 403 slides in the depth section 309, and the lateral support portion 405 is connected to the main body 403 through the clamping portion 406. The arc-shaped surface 401 formed by them can better contact the pole piece. The arc-shaped clearance section 308 provides sufficient space for the lateral support portion 405 to move, so that it can better adapt to the shape changes of the pole piece when in contact with the pole piece. This helps to reduce scratches and damage on the surface of the pole piece and improve the surface quality of the pole piece.

[0061] The main body 403 of the anti-wrinkle sheet 4 slides within the deep section 309, and the guide surface 303 of the deep section 309 provides a stable sliding path for the main body 403. Furthermore, the lateral support portion 405 is tightly connected to the main body 403 via the latch 406, further enhancing the overall stability of the anti-wrinkle sheet 4. During operation, especially when the anti-wrinkle sheet 4 abuts the pole piece, the anti-wrinkle sheet 4 can smoothly adjust to the movement of the pole piece, preventing shaking and deviation.

[0062] The curved relief section 308 provides a buffer for the lateral support portion 405, reducing collision and friction between the lateral support portion 405 and the sidewalls of the mounting slot 302. This design reduces wear on the anti-wrinkle sheet 4 and the components associated with the mounting slot 302. The main body 403 of the anti-wrinkle sheet 4 and the lateral support portion 405 are connected by a latching slot 404 and a latching portion 406. This structure simplifies the installation and removal of the anti-wrinkle sheet 4. The operator simply snaps the latching portion 406 of the lateral support portion 405 into the latching slot 404 of the main body 403 to complete assembly. For disassembly, simply remove the latching portion 406 from the latching slot 404.

[0063] In some examples, such as Figures 2 to 7As shown, the chute 310 provides a smooth sliding path for the slider 306, reducing friction and collision between the slider 306 and the sidewalls of the mounting slot 302. When the slider 306 slides into the chute 310, a gap is created between the slider 306 and the sidewalls of the mounting slot 302, facilitating the insertion and removal of the wrinkle-proof sheet 4. The length of the main body 403 is shorter than the depth of the depth section 309, allowing the wrinkle-proof sheet 4 greater room for movement in the depth direction. The slider 306 can be engaged and disengaged with the mounting hole 402 by simply pressing the wrinkle-proof sheet 4 into the depth section 309 to a certain depth.

[0064] In some examples, such as Figures 1 to 4 As shown, the slitting blades 502 are arranged along the axis of the slitting roller 5, and the main roller 501 is rotatably mounted on the outlet side of the extrusion roller 3, enabling precise slitting of rolled lithium battery electrode sheets. The arrangement of the slitting blades 502 allows for precise control of the width and size of the slitting according to production requirements, ensuring consistent specifications of the electrode sheets after slitting. Guides 503 are located on either side of the slitting roller 5, providing guidance before the lithium battery electrode sheets are slitting. The guides 503 ensure smooth entry of the electrode sheets into the slitting area, preventing them from shifting or shaking during the slitting process, thereby improving the edge quality of the electrode sheets after slitting. The electrode edges are more uniform and smooth, reducing the occurrence of burrs and tears. Guided by the guides 503, the electrode sheets can pass through the slitting blades 502 in a stable position, minimizing damage to the electrode sheets during the slitting process. The slitting blades 502 cut the electrode sheets more smoothly, reducing damage to the electrode sheet's internal structure caused by uneven cutting resistance.

[0065] In some examples, such as Figures 1 to 4 As shown, the take-up roller 6 is rotatably mounted on the discharge side of the slitting roller 5, enabling timely rewinding of the slit lithium battery electrode sheets. This allows the entire rolling and slitting process to proceed continuously, avoiding production interruptions caused by electrode sheet accumulation or waiting for processing. During the rewinding process, the take-up roller 6 applies a certain amount of tension to the slit electrode sheets, keeping them flat during the rewinding process. This tension control effectively prevents wrinkles or bends in the electrode sheets during the rewinding process, ensuring their flatness and quality.

[0066] In some examples, such as Figures 1 to 4 As shown, the guide roller group 7 is arranged between the slitting roller 5 and the receiving roller 6, and can accurately guide the lithium battery pole pieces cut by the slitting roller 5 to different receiving rollers 6. By rationally arranging the position and angle of the guide roller group 7, it can be ensured that the pole pieces accurately enter the corresponding receiving rollers 6 for winding. In the process of guiding the pole pieces, the guide roller group 7 can apply uniform tension to the pole pieces, further ensuring the flatness of the pole pieces. At the same time, the setting of the guide roller group 7 allows the cut pole pieces to be wound along different paths, avoiding overlap when winding along the same path, which may cause pole piece failure.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not limiting. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and all of these should be included in the scope of the claims of the present disclosure.

Claims

1. A lithium battery pole piece rolling and slitting machine, characterized in that: include: Rack (1); A roller (2), the roller (2) being rotatably arranged on the frame (1); A squeezing roller (3), the squeezing roller (3) being arranged on one side of the supporting roller (2), forming a rolling space (301) between the squeezing roller (3) and the supporting roller (2), the rolling space (301) being used for the passage of lithium battery pole pieces, the squeezing roller (3) having two mounting grooves (302), and being arranged along the axial direction of the squeezing roller (3); an anti-wrinkle sheet (4), the anti-wrinkle sheet (4) being slidably disposed in the mounting groove (302), the anti-wrinkle sheet (4) being two, and the anti-wrinkle sheet (4) being configured such that when the anti-wrinkle sheet (4) contacts the lithium battery electrode, the two anti-wrinkle sheets (4) can slide from the middle of the squeezing roller (3) toward the two ends of the squeezing roller (3); A slitting roller (5), the slitting roller (5) being arranged at an outlet side of the rolling space (301); The bottom of the mounting groove (302) has a guide surface (303) for guiding the sliding of the anti-wrinkle sheet (4); the bottom of the anti-wrinkle sheet (4) abuts against the guide surface (303); the end of the anti-wrinkle sheet (4) has an arcuate surface (401); the arcuate surface (401) is used to abut against the lithium battery electrode membrane; the curvature of the arcuate surface (401) is the same as the curvature of the squeezing roller (3); There are at least two mounting grooves (302), two mounting grooves (302) parallel to the axial direction of the squeezing roller (3) form a group, and several groups of mounting grooves (302) are arranged along the circumference of the squeezing roller (3).

2. The lithium battery pole piece rolling and slitting machine according to claim 1, characterized in that: The anti-wrinkle sheet (4) has an abutment portion (407), the arcuate surface (401) is located at the end of the abutment portion (407), and the abutment portion (407) is configured so that after the abutment portion (407) slides into the mounting groove (302), the arcuate surface (401) and the outer surface of the squeezing roller (3) form a smooth arcuate surface.

3. The lithium battery pole piece rolling and slitting machine according to claim 2, characterized in that: The anti-wrinkle sheet (4) has a mounting hole (402), and the squeezing roller (3) comprises: A roller body (305), the roller body (305) is rotatably arranged on the frame (1), and the roller body (305) has the mounting groove (302); a sliding member (306), the sliding member (306) being slidably disposed on a side wall of the mounting groove (302), the sliding direction of the sliding member (306) being parallel to the guide surface (303), and the sliding member (306) passing through the mounting hole (402); An elastic member (307), wherein the elastic member (307) provides the sliding member (306) with a force to drive the anti-wrinkle sheet (4) to slide out of the installation groove (302).

4. The lithium battery pole piece rolling and slitting machine according to claim 3, characterized in that: The mounting groove (302) has an arc-shaped yielding section (308) and a depth section (309), the depth section (309) has the guide surface (303), there are two arc-shaped yielding sections (308), which are symmetrically arranged along the depth section (309), and the wrinkle-proof sheet (4) includes: A main body (403), the main body (403) is slidably disposed in the depth section (309), the main body (403) has two card slots (404), and the card slots (404) are respectively located on both sides of the main body (403); A lateral support portion (405), the lateral support portion (405) having a clamping portion (406) and the abutting portion (407), the clamping portion (406) being clamped in the clamping slot (404), and the main body (403) and the upper end surface of the lateral support portion (405) forming the arcuate surface (401).

5. The lithium battery pole piece rolling and slitting machine according to claim 4, characterized in that: The length of the main body (403) is less than the depth of the depth section (309), and the side wall of the mounting groove (302) has a clearance bevel (310), and the sliding member (306) slides into or out of the clearance bevel (310) after sliding. The clearance bevel (310) is used to enable the sliding member (306) to slide into or out of the mounting hole (402) after sliding into the clearance bevel (310).

6. The lithium battery pole piece rolling and slitting machine according to claim 1, characterized in that: The slitting roller (5) comprises: A main roller (501), the main roller (501) being rotatably arranged on an outlet side of the squeezing roller (3); A plurality of slitting knives (502) are arranged along the axis of the slitting roller (5); A guide member (503), wherein the guide member (503) is arranged on the slitting roller (5), and there are two guide members (503), which are respectively located on both sides of the slitting roller (5) and are used for guiding the lithium battery electrode membrane before slitting.

7. The lithium battery pole piece rolling and slitting machine according to claim 1, characterized in that: The lithium battery pole piece rolling and slitting machine further comprises: A plurality of receiving rollers (6) are provided, and the plurality of receiving rollers (6) are all rotatably arranged on the discharge side of the slitting roller (5) group, and are used for rewinding the lithium battery pole pieces after slitting.

8. The lithium battery pole piece rolling and slitting machine according to claim 7, characterized in that: The lithium battery pole piece rolling and slitting machine further comprises: A guide roller group (7) is provided between the slitting roller (5) and the receiving roller (6) and is used for guiding the lithium battery electrode membrane after being cut by the slitting roller (5) to different receiving rollers (6).

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