Pole piece rolling device
By introducing tab calendering and tension buffering mechanisms into the electrode rolling device, the problem of tab wrinkling damage was solved, and the pass rate of electrode processing and material bonding stability were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-27
AI Technical Summary
Existing electrode rolling devices are prone to damage when the electrode tabs are wrinkled, resulting in a low electrode processing qualification rate.
An electrode rolling device was designed, comprising an unwinding mechanism, an electrode tab calendering mechanism, a stretching rolling mechanism, and a winding mechanism. The electrode tab calendering mechanism pre-calenders the electrode before it enters the stretching rolling mechanism to prevent damage to the electrode tab under high compaction conditions, and the tension buffering mechanism reduces tension fluctuations.
It improves the pass rate of electrode processing, avoids electrode tab wrinkling and damage through tab calendering and tension buffering, and enhances the ductility and material bonding stability of the electrode.
Smart Images
Figure CN224053140U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery manufacturing equipment technical field especially relates to a pole piece roll device. BACKGROUND
[0002] The production and manufacture of lithium ion batteries are a process connected by multiple process steps. Overall, the production process of lithium batteries includes a pole piece manufacturing process stage, a battery assembly process stage, and a liquid injection, pre-charging, formation, and aging process stage. In the pole piece manufacturing process stage, it can be subdivided into five processes: slurry preparation, slurry coating, pole piece rolling, pole piece slitting, and pole piece drying. Each process in the battery manufacturing process causes some waste of raw materials. The reasons for waste include operational errors, equipment failures, and environmental factors. In order to ensure the cost rate of the product, it is necessary to ensure the qualified rate of the finished product at each process as much as possible.
[0003] The pole piece generally includes a pole piece main body and a tab. In the pole piece rolling process, a pole piece rolling device is usually used to achieve it. The existing pole piece rolling device usually includes an unwinding mechanism, a tension buffer mechanism, a front stretching mechanism, a rolling mechanism, a rear stretching mechanism, a tension buffer mechanism, and a winding mechanism. The pole piece structure usually passes through the above-mentioned mechanisms in turn to complete the pole piece rolling process. In the above-mentioned process, the tab is in a high compaction state when passing through the front stretching mechanism, the rolling mechanism, and the rear stretching mechanism. If the tab has wrinkles, it is easy to cause damage and cracking problems.
[0004] Therefore, there is an urgent need for a pole piece rolling device to solve the above problems. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a pole piece rolling device which can solve the problem of damage caused by the wrinkled tab in a high compaction state during the stretching and rolling process, and improve the qualified rate of pole piece processing.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] The pole piece rolling device includes, which are arranged in the rolling direction of the pole piece in turn:
[0008] The unwinding mechanism is configured to unwind the pole piece;
[0009] The stretching and rolling mechanism is configured to stretch and roll the pole piece;
[0010] The winding mechanism is configured to wind the pole piece;
[0011] Among them, the tab stretching mechanism is arranged between the unwinding mechanism and the stretching and rolling mechanism, and is configured to pre-stretch the tab of the pole piece before the pole piece enters the stretching and rolling mechanism.
[0012] As a preferred scheme of the pole piece rolling device provided by the utility model, the stretching and rolling mechanism comprises a first stretching assembly and a second stretching assembly arranged in sequence along the rolling direction of the pole piece, and the first stretching assembly and the second stretching assembly can stretch the pole piece in sequence.
[0013] As a preferred scheme of the pole piece rolling device provided by the utility model, the stretching and rolling mechanism further comprises a rolling assembly, the rolling assembly is arranged between the first stretching assembly and the second stretching assembly in the rolling direction of the pole piece, and is configured to roll the pole piece after stretching by the first stretching assembly.
[0014] As a preferred scheme of the pole piece rolling device provided by the utility model, the pole piece rolling device further comprises a first tension buffer mechanism, the first tension buffer mechanism is arranged between the unwinding mechanism and the tab stretching mechanism in the rolling direction of the pole piece, and is configured to reduce the tension of the pole piece when the unwinding mechanism releases the pole piece.
[0015] As a preferred scheme of the pole piece rolling device provided by the utility model, the pole piece rolling device further comprises a second tension buffer mechanism, the second tension buffer mechanism is arranged between the stretching and rolling mechanism and the winding mechanism in the rolling direction of the pole piece, and is configured to reduce the tension of the pole piece when the winding mechanism winds the pole piece.
[0016] As a preferred scheme of the pole piece rolling device provided by the utility model, the tab stretching mechanism comprises a driving roller and a plurality of jacking pressure rollers, the driving roller can rotate around its own axis, the plurality of jacking pressure rollers are coaxially and spacedly arranged, and the axis direction of the jacking pressure roller is parallel to the axis direction of the driving roller.
[0017] As a preferred scheme of the pole piece rolling device provided by the utility model, a rolling gap is arranged between the driving roller and the jacking pressure roller, the pole piece is arranged in the rolling gap, and the jacking pressure roller can jacking the pole piece so that the tab of the pole piece abuts against the driving roller.
[0018] As a preferred scheme of the pole piece rolling device provided by the utility model, the tab stretching mechanism further comprises a supporting roller, the supporting roller is arranged on the side of the driving roller away from the jacking pressure roller, and the driving roller is parallel to and abuts against the supporting roller.
[0019] As a preferred scheme of the pole piece rolling device provided by the utility model, the diameter of the supporting roller is greater than the diameter of the driving roller, and the length of the supporting roller is not less than the length of the driving roller.
[0020] As a preferred scheme of the pole piece roller pressing device, the jacking pressing wheel is adjustable in position along a direction parallel to an axis direction of the driving roller.
[0021] The utility model discloses the beneficial effect that:
[0022] The pole piece roller pressing device provided by the utility model comprises unwinding mechanisms, pole lug calendering mechanisms, stretching roller pressing mechanisms and winding mechanisms arranged in sequence along a roller pressing direction of the pole piece. The unwinding mechanisms can realize unwinding of the pole piece. The stretching roller pressing mechanisms can stretch and roll press the pole piece to improve ductility of the pole piece and a stable degree of combination of materials of each layer of the pole piece. The winding mechanisms can wind the pole piece after stretching and roll pressing by the stretching roller pressing mechanisms to complete roller pressing processing of the pole piece. The pole lug calendering mechanisms can calender pole lug of the pole piece to improve ductility of the pole lug. The pole lug calendering mechanisms are arranged between the unwinding mechanisms and the stretching roller pressing mechanisms along the roller pressing direction of the pole piece to calender and stretch the pole lug of the pole piece before stretching and roll pressing of the pole piece, so that the damaged pole lug in a high compaction state caused by the wrinkled pole lug during stretching and roll pressing of the pole piece is avoided, and the qualified rate of pole piece processing is improved. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the embodiments of the utility model and the drawings by those skilled in the art without any creative labor.
[0024] Figure 1 It is the schematic diagram of the pole piece roller pressing device provided by the embodiments of the utility model.
[0025] Figure 2 It is the schematic diagram of the pole lug calendering mechanism provided by the embodiments of the utility model.
[0026] In the drawings:
[0027] 10, pole piece;
[0028] 100, unwinding mechanism;
[0029] 200, pole lug calendering mechanism; 210, driving roller; 220, jacking pressing wheel; 230, supporting roller;
[0030] 300, stretching and rolling mechanism; 310, first stretching assembly; 311, first stretching roller; 312, second stretching roller; 313, first guide roller; 320, second stretching assembly; 321, third stretching roller; 322, fourth stretching roller; 323, second guide roller; 330, rolling assembly; 331, first rolling member; 332, second rolling member; 333, rolling guide member;
[0031] 400, winding mechanism; 410, winding roller; 420, winding guide roller;
[0032] 500, first tension buffering mechanism; 510, first buffering roller; 520, second buffering roller;
[0033] 600, second tension buffering mechanism; 610, third buffering roller; 620, fourth buffering roller. DETAILED DESCRIPTION
[0034] The technical solutions of the present application will be further described below in conjunction with the accompanying drawings and through specific embodiments.
[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.
[0036] Therefore, the detailed description of the embodiments of the present application provided in the accompanying drawings below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0037] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0038] In the description of the utility model, it needs to explain that, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0039] In the description of the utility model, it also needs to explain that, unless otherwise specified and limited, the terms "set", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0040] In the utility model, unless otherwise specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0041] In the embodiment of the utility model, the term "and / or" is only a description of the association relationship of the associated object, which means that there can be three kinds of relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the utility model generally indicates that the front and rear associated objects have an "or" relationship.
[0042] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.
[0043] Figure 1A schematic view of the pole piece rolling device is shown. Figure 1 The pole piece rolling device comprises an unwinding mechanism 100, a tab stretching mechanism 200, a stretching and rolling mechanism 300, and a winding mechanism 400.
[0044] Specifically, the unwinding mechanism 100 is configured to unwind the pole piece 10 that needs to be rolled.
[0045] Specifically, the tab stretching mechanism 200 is arranged downstream of the unwinding mechanism 100 along the rolling direction of the pole piece 10, and is configured to stretch the tabs of the pole piece 10 to improve the ductility of the tabs of the pole piece 10.
[0046] Specifically, the stretching and rolling mechanism 300 is arranged downstream of the tab stretching mechanism 200 along the rolling direction of the pole piece 10, and is configured to stretch and roll the pole piece 10 to improve the ductility of the pole piece and to compact the layers of the pole piece 10 to improve the stability and tightness of the combination.
[0047] More specifically, the winding mechanism 400 is arranged downstream of the stretching and rolling mechanism 300 along the rolling direction of the pole piece 10, and is configured to wind the pole piece 10 to store the pole piece 10 that has completed rolling.
[0048] It should be noted that by arranging the tab stretching mechanism 200, the tabs of the pole piece 10 can be stretched to improve the ductility, and by arranging the tab stretching mechanism 200 between the unwinding mechanism 100 and the stretching and rolling mechanism 300 along the rolling direction of the pole piece 10, the tabs of the pole piece 10 can be stretched before the pole piece 10 is stretched and rolled, avoiding damage caused by the folded tabs under high compaction during stretching and rolling of the pole piece, and improving the yield of pole piece processing.
[0049] Continuing to refer to Figure 1 The stretching and rolling mechanism 300 comprises a first stretching assembly 310 and a second stretching assembly 320 arranged in sequence along the rolling direction of the pole piece 10. The first stretching assembly 310 and the second stretching assembly 320 can stretch the pole piece 10 in sequence. The pole piece 10 can effectively improve the ductility by being stretched twice.
[0050] Specifically, the stretching and rolling mechanism 300 further comprises a rolling assembly 330. The rolling assembly 330 is arranged between the first stretching assembly 310 and the second stretching assembly 320 along the rolling direction of the pole piece 10, and is configured to roll the pole piece 10 after being stretched by the first stretching assembly 310. That is, the second stretching assembly 320 can stretch the pole piece 10 again after rolling.
[0051] More specifically, the first stretching assembly 310 includes a first stretching roller 311, a second stretching roller 312, and a first guide roller 313. The first stretching roller 311 and the second stretching roller 312 are parallel to each other and arranged side by side. In the embodiment, as shown in the figure, the first stretching roller 311 and the second stretching roller 312 are arranged in an up-down state. The first guide roller 313 is arranged upstream of the first stretching roller 311 and the second stretching roller 312 along the rolling direction of the pole piece 10. The pole piece 10 processed by the tab rolling mechanism 200 can first pass under the first guide roller 313 and be guided to above the first stretching roller 311, pass above the first stretching roller 311, pass through the gap between the first stretching roller 311 and the second stretching roller 312, and be guided to below the second stretching roller 312, and then extend to the rolling assembly 330 after passing below the second stretching roller 312. Figure 1 Figure 1
[0052] More specifically, the rolling assembly 330 includes a first rolling member 331, a second rolling member 332, and a rolling guide member 333. The first rolling member 331 and the second rolling member 332 are parallel to each other and arranged side by side. In the embodiment, as shown in the figure, the first rolling member 331 and the second rolling member 332 are arranged in an up-down state. The rolling guide member 333 is arranged upstream of the first rolling member 331 and the second rolling member 332 along the rolling direction of the pole piece 10. The pole piece 10 extended out of the second stretching roller 312 can first pass above the rolling guide member 333 and be guided to between the first rolling member 331 and the second rolling member 332 for rolling, and then extend out of the first rolling member 331 and the second rolling member 332. Figure 1 Figure 1
[0053] More specifically, the second stretching assembly 320 includes a third stretching roller 321, a fourth stretching roller 322, and a second guide roller 323. The third stretching roller 321 and the fourth stretching roller 322 are parallel to each other and arranged side by side. In the embodiment, as shown in the figure, the third stretching roller 321 and the fourth stretching roller 322 are arranged in an up-down state. The second guide roller 323 is arranged upstream of the third stretching roller 321 and the fourth stretching roller 322 along the rolling direction of the pole piece 10. The pole piece 10 extended out of the first rolling member 331 and the second rolling member 332 can first pass above the second guide roller 323 and be guided to between the third stretching roller 321 and the fourth stretching roller 322 for stretching, and then extend out of the third stretching roller 321 and the fourth stretching roller 322. Figure 1 Figure 1 The second guide roller 323 is arranged below the third stretching roller 321, and the pole piece 10 passes over the third stretching roller 321, then passes through the gap between the third stretching roller 321 and the fourth stretching roller 322, and is guided below the fourth stretching roller 322, and then extends towards the winding mechanism 400 after passing over the fourth stretching roller 322.
[0054] With reference back to Figure 1 The pole piece rolling device further comprises a first tension buffer mechanism 500. The first tension buffer mechanism 500 is arranged between the unwinding mechanism 100 and the tab rolling mechanism 200 in the rolling direction of the pole piece 10, and is configured to reduce the tension of the pole piece 10 when the unwinding mechanism 100 releases the pole piece 10.
[0055] Specifically, the first tension buffer mechanism 500 specifically comprises a first buffer roller 510 and a second buffer roller 520. The first buffer roller 510 and the second buffer roller 520 are arranged in the rolling direction of the pole piece 10. The pole piece 10 unwound from the unwinding mechanism 100 first passes over the first buffer roller 510, and then passes over the second buffer roller 520 before extending to the tab rolling mechanism 200. Figure 1
[0056] With reference back to Figure 1 The pole piece rolling device further comprises a second tension buffer mechanism 600. The second tension buffer mechanism 600 is arranged between the stretching roller mechanism 300 and the winding mechanism 400 in the rolling direction of the pole piece 10, and is configured to reduce the tension of the pole piece 10 when the winding mechanism 400 winds the pole piece 10.
[0057] Specifically, the second tension buffer mechanism 600 comprises a third buffer roller 610 and a fourth buffer roller 620. The third buffer roller 610 and the fourth buffer roller 620 are arranged in the rolling direction of the pole piece 10. The pole piece 10 extending from the second stretching assembly 320 first passes over the third buffer roller 610, and then passes over the fourth buffer roller 620 before extending to the winding mechanism 400. Figure 1
[0058] With reference back to Figure 1 The winding mechanism 400 comprises a winding roller 410 and a winding guide roller 420. The winding guide roller 420 is arranged upstream of the winding roller 410 in the rolling direction of the pole piece 10, and is arranged at a height higher than the winding roller 410 and higher than the fourth buffer roller 620. The pole piece 10 passing below the fourth buffer roller 620 first passes over the winding guide roller 420, and then winds on the winding roller 410. Through the winding guide roller 420, the pole piece 10 can be wound on the winding roller 410 in a relatively flat state.
[0059] Figure 2 A schematic view of a tab rolling mechanism is shown. Referring to Figure 2 The tab rolling mechanism 200 includes a driving roller 210 and a plurality of lifting pressure rollers 220. The driving roller 210 can rotate about its own axis, and the plurality of lifting pressure rollers 220 are coaxially and spaced apart. The axis direction of the lifting pressure rollers 220 is parallel to the axis direction of the driving roller 210. A rolling gap is provided between the driving roller 210 and the lifting pressure rollers 220. The tab sheet 10 is arranged in the rolling gap, and the lifting pressure rollers 220 can lift the tab sheet 10 so that the tabs of the tab sheet 10 abut against the driving roller 210. In this embodiment, the lifting pressure rollers 220 are two, which can cooperate with and abut against the driving roller 210. The driving roller 210 is a driving roller when working, which can rotate under the driving of an external driving member. When the lifting pressure rollers 220 abut against the driving roller 210, the lifting pressure rollers 220 can be driven to rotate by the driving roller 210, so as to roll the tabs passing through the gap between the driving roller 210 and the lifting pressure rollers 220, and make the tabs stretch.
[0060] Specifically, the tab rolling mechanism 200 further includes a supporting roller 230. The supporting roller 230 is arranged on the side of the driving roller 210 away from the lifting pressure rollers 220. The driving roller 210 is parallel to and abuts against the supporting roller 230. When the tab rolling operation is performed, the lifting pressure rollers 220 abut against the driving roller 210, and the supporting roller 230 provides a supporting force to the driving roller 210, which is opposite to the abutting force of the lifting pressure rollers 220. The supporting roller 230 can avoid the driving roller 210 from being bent, and ensure the smooth tab rolling.
[0061] More specifically, the diameter of the supporting roller 230 is greater than the diameter of the driving roller 210. Through the above arrangement, the supporting rigidity and reliability of the supporting roller 230 to the driving roller 210 can be enhanced.
[0062] More specifically, the length of the supporting roller 230 is not less than the length of the driving roller 210. Through the above arrangement, the supporting roller 230 can support the entire driving roller 210 in the length direction, and the supporting performance and the uniformity of the stress of the driving roller 210 can be improved.
[0063] As a preferred, the position of the lifting pressure rollers 220 is adjustable along a direction parallel to the axis direction of the driving roller 210. Through the above arrangement, the tab rolling mechanism 200 can be applied to the tab rolling process of tab sheets 10 of more sizes. The position of the lifting pressure rollers 220 can be flexibly adjusted according to the position of the tabs on the tab sheet 10.
[0064] In the embodiment, the plurality of jacking press wheels 220 can be arranged on a transverse adjusting mechanism, which can be provided with a guide rail, a rack and a plurality of adjusting gears. The guide rail is arranged parallel to the axis direction of the driving roller 210, and the plurality of jacking press wheels 220 are adjustably and slidingly connected to the guide rail. The rack is arranged parallel and spaced apart from the guide rail, and the adjusting gears are one-to-one corresponding and connected to the jacking press wheels 220, and the adjusting gears are meshingly connected to the rack, and can drive the jacking press wheels 220 to move along the guide rail by meshing and rolling on the rack, so as to change the positions.
[0065] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent substitution and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. An electrode rolling device, characterized in that, Including those arranged sequentially along the rolling direction of the electrode (10): An unwinding mechanism (100) is configured to unwind the electrode sheet (10); A stretching and rolling mechanism (300) is configured to stretch and roll the electrode sheet (10); A winding mechanism (400) is configured to wind up the electrode sheet (10); An electrode tab rolling mechanism (200) is provided between the unwinding mechanism (100) and the stretching and rolling mechanism (300), which is configured to pre-roll the electrode tabs of the electrode sheet (10) before the electrode sheet (10) enters the stretching and rolling mechanism (300).
2. The electrode rolling device according to claim 1, characterized in that, The stretching and rolling mechanism (300) includes a first stretching component (310) and a second stretching component (320) arranged sequentially along the rolling direction of the electrode (10), and the first stretching component (310) and the second stretching component (320) are configured to stretch the electrode (10).
3. The electrode rolling device according to claim 2, characterized in that, The stretching and rolling mechanism (300) further includes a rolling assembly (330) disposed between the first stretching assembly (310) and the second stretching assembly (320), configured to roll the electrode sheet (10).
4. The electrode rolling device according to claim 1, characterized in that, The electrode rolling device further includes a first tension buffer mechanism (500), which is disposed between the unwinding mechanism (100) and the electrode tab calendering mechanism (200) and is configured to reduce the tension on the electrode (10) when the unwinding mechanism (100) releases the electrode (10).
5. The electrode rolling device according to claim 1, characterized in that, The electrode rolling device further includes a second tension buffer mechanism (600), which is disposed between the stretching rolling mechanism (300) and the winding mechanism (400) and is configured to reduce the tension on the electrode (10) when the winding mechanism (400) winds up the electrode (10).
6. The electrode rolling device according to any one of claims 1-5, characterized in that, The tab rolling mechanism (200) includes a drive roller (210) and a plurality of lifting rollers (220). The drive roller (210) is rotatable around its own axis. The plurality of lifting rollers (220) are coaxially spaced apart. The axial direction of the lifting rollers (220) is parallel to the axial direction of the drive roller (210).
7. The electrode rolling device according to claim 6, characterized in that, A roller pressing gap is provided between the drive roller (210) and the lifting roller (220), the electrode (10) is disposed in the roller pressing gap, and the lifting roller (220) can lift the electrode (10) so that the electrode tab of the electrode (10) abuts against the drive roller (210).
8. The electrode rolling device according to claim 6, characterized in that, The tab rolling mechanism (200) further includes a support roller (230), which is disposed on the side of the drive roller (210) away from the lifting roller (220), and the drive roller (210) is parallel to and abuts against the support roller (230).
9. The electrode rolling device according to claim 8, characterized in that, The diameter of the support roller (230) is larger than the diameter of the drive roller (210); The length of the support roller (230) is not less than the length of the drive roller (210).
10. The electrode rolling device according to claim 6, characterized in that, The position of the lifting roller (220) along the axis parallel to the drive roller (210) is adjustable.