Tension roller, rolling equipment and battery production system
By designing a tension roller with a deformable top support assembly, the problems of the pole ear breakage and wrinkle during the battery plate rolling process are solved, and more uniform and efficient pole ear ductility is achieved, avoiding traditional Teflon patching The operation is complicated and the effect is not good.
Patent Information
- Application Number
- CN202420554680.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-03-20
AI Technical Summary
The battery pole plate is prone to problems such as the ear breakage and wrinkle during the rolling process. The existing technology adapts the thickness by attaching Teflon, but the operation is complicated and cannot effectively improve the ductility.
A tension roller is designed, including a secondary roller section and a main roller section, which has a deformable first roller surface layer and a top support assembly, which is composed of a sector-shaped portion, and can be between an initial state and a top support state. Switching, by controlling the movement of the sector block, the first roller surface layer fits the pole ear region, providing uniform tension to improve the pole ear region.
This solution is easy to operate, can adjust the lift distance steplessly, provide more precise tension, significantly reduce the fracture and wrinkle problems in the extreme ear area during the rolling process, and the lifting force is evenly distributed, and the extension effect is better.
Smart Images
Figure CN222320278U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of battery preparation, and in particular to tension rollers, rolling equipment and battery production systems. Background Art
[0002] The battery pole piece will have a certain extension when rolled. Because the coating area and the tab area are of different thicknesses and are subjected to different tensions, the extension rates of the two are inconsistent, which can easily lead to tab breakage, wrinkles and other problems. In order to reduce the problems of tab breakage and wrinkles in the tab area, the conventional method is to attach Teflon to the tension roller, and adapt the thickness of the tab area according to the thickness and number of layers of the matching Teflon to improve the ductility of the tab area. This method requires multiple attempts to manually select Teflon of suitable thickness, which is time-consuming and laborious; and because the thickness specifications of Teflon can be selected are limited, the tab cannot have better ductility, and the problems of tab breakage and wrinkles are not well improved. Utility Model Content
[0003] Based on this, it is necessary to provide a tension roller, rolling equipment and battery production system to address the problems of wrinkles and breakages of the tabs when the battery poles are rolled.
[0004] A tension roller, comprising a secondary roller segment and a primary roller segment adjacently arranged along the axis direction of the tension roller;
[0005] The secondary roller segment comprises a supporting assembly and a deformable first roller surface layer, wherein the first roller surface layer surrounds the axis of the tension roller to form an installation space, and the supporting assembly is located in the installation space;
[0006] The supporting assembly includes a supporting portion and a plurality of fan-shaped portions, each of the fan-shaped portions is located in a different radial direction of the tension roller, and all of the fan-shaped portions have an initial state of being able to be spliced into a circumferential structure, and the circumferential structure is circumferentially fitted with the surface layer of the first roller;
[0007] The supporting portion can drive all the fan-shaped portions to reciprocate along the corresponding radial direction, so that all the fan-shaped portions can switch between the initial state and a lifting state capable of lifting the first roller surface layer to deform relative to the roller surface of the main roller segment.
[0008] In some embodiments, the secondary roller segment includes a plurality of deformation zones adjacently arranged along the axis of the tension roller; the first roller surface layer of each deformation zone is correspondingly provided with an independent top support assembly.
[0009] In some embodiments, the secondary roll segment includes a first deformation zone and a second deformation zone sequentially arranged along the axis in a direction away from the primary roll segment; a width of the first deformation zone is smaller than a width of the second deformation zone.
[0010] In some embodiments, the secondary roll segment further includes a third deformation zone, wherein the third deformation zone is disposed between the first deformation zone and the second deformation zone; and the sum of the width of the first deformation zone and the width of the third deformation zone is smaller than the width of the second deformation zone.
[0011] In some embodiments, the supporting portion includes a plurality of lifting members, each of the lifting members is connected to a corresponding fan-shaped portion, and the lifting members can drive the connected fan-shaped portion to move in a corresponding radial direction.
[0012] In some embodiments, the main roll segment includes a second roll surface layer, and the second roll surface layer is integrally connected to the first roll surface layer.
[0013] In some embodiments, the main roller segment further includes a supporting roller portion, the supporting roller portion is in a rotating structure around the axis of the tension roller, and the second roller surface layer is attached to the outer periphery of the supporting roller portion.
[0014] In some embodiments, two secondary roller segments are configured, and the two secondary roller segments are arranged on both sides of the main roller segment.
[0015] A rolling device, comprising the tension roller described in any one of the above embodiments.
[0016] A battery production system comprises the rolling device in the above embodiment.
[0017] In the above-mentioned tension roller, rolling equipment and battery production system, when actually used, the coating area of the pole piece is set in the main roller section of the tension roller, and the pole ear area of the pole piece is set in the secondary roller section of the tension roller. When all the fan-shaped blocks are in the initial state, due to the thin thickness of the pole ear area, it is not tightly attached to the first roller surface layer, which is not conducive to the extension of the pole ear area. In order to improve the ductility of the pole ear area, in actual operation, the top support part can be controlled to move all the fan-shaped blocks, so that all the fan-shaped blocks can jointly open the first roller surface layer outward, so that the first roller surface layer and the pole ear area can be well attached, and then the pole ear area of the pole piece can also be subjected to the tension of the tension roller, and the pole ear area is well extended, which can greatly reduce the problem of fracture and wrinkles in the pole ear area during the rolling process. Compared with the traditional method of pasting Teflon, the scheme of the present application is not only easy to operate, saves trouble and labor, but also can steplessly adjust the lifting distance of the fan-shaped blocks, so that the first roller surface layer can act on the pole ear area with more precise tension, and the extension effect of the pole ear area is better.
[0018] In addition, since all the fan-shaped portions form a circumferential structure that fits the circumference of the first roller surface layer in the initial state, the supporting force exerted by all the fan-shaped portions on the first roller surface layer is evenly distributed, which helps to maintain a good roundness of the first roller surface layer. Therefore, the first roller surface layer can provide more uniform tension to the pole lug area, and the pole lug area extends more evenly. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:
[0020] Figure 1 A schematic diagram of the internal structure of a tension roller when applied to a pole piece in some embodiments;
[0021] Figure 2 is a perspective schematic diagram of a tension roller of some embodiments;
[0022] Figure 3 Schematic diagram of the internal explosion of the tension roller in some embodiments.
[0023] The reference numerals in the specific implementation manner are as follows:
[0024] 100, tension roller; 10, secondary roller segment; 11, first roller surface layer; 12, top support assembly; 12a, top support portion; 12b, fan-shaped portion; q1, first deformation zone; q2, second deformation zone; q3, third deformation zone; 20, main roller segment; 21, second roller surface layer; 22, support roller portion; 30, roller shaft; 200, pole piece; 201, coating area; 202, pole ear area; 203, insulation area. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0026] In the description of the present application, it should be understood that terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships, if any, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, 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, and therefore should not be understood as a limitation on the present application.
[0027] In addition, if present, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0028] In this application, unless otherwise clearly specified and limited, if any, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0029] In the present application, if it appears, unless otherwise clearly specified and limited, a first feature “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature “above”, “above” and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature “below”, “below” and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0030] It should be noted that, if present, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0031] In order to solve the problems mentioned in the background technology, the embodiments of the present application provide a tension roller, a rolling device and a battery production system. The tension roller and the rolling device can be, but are not limited to, rolling of pole pieces. Generally, the pole piece includes a coating area and a pole lug area arranged adjacent to each other. The current collector in the coating area is covered with active materials, and the current collector in the pole lug area is not covered with active materials. In some examples, an insulating area is also provided between the pole lug area and the coating area, and an insulating material, including but not limited to ceramics, is covered on the current collector in the insulating area.
[0032] The tension roller in the embodiment of the present application is described in detail below.
[0033] According to some embodiments of this application, please refer to Figures 1 to 3 The tension roller 100 provided in the embodiment of the present application comprises a secondary roller segment 10 and a main roller segment 20 adjacently arranged along the axial direction of the tension roller 100, the secondary roller segment 10 comprises a supporting assembly 12 and a deformable first roller surface layer 11, the first roller surface layer 11 surrounds the axis of the tension roller 100 and is enclosed at the periphery of the supporting assembly 12. The supporting assembly 12 comprises a supporting portion 12a and a plurality of fan-shaped portions 12b, each fan-shaped portion 12b is located in a different radial direction of the tension roller 100, and all the fan-shaped portions 12b have an initial state in which they can be spliced into a circular structure, and the circumferential structure is circumferentially fitted with the first roller surface layer 11. The supporting portion 12a can drive all the fan-shaped portions 12b to reciprocate along the corresponding radial direction, so that all the fan-shaped portions 12b can switch between the initial state and the lifting state in which the first roller surface layer 11 can be lifted to deform relative to the roller surface of the main roller segment 20.
[0034] The outer surface of the first roller surface layer 11 is the roller surface of the secondary roller segment 10, and the first roller surface layer 11 is deformable. Specifically, the first roller surface layer 11 can be, but is not limited to, made of plastic. The first roller surface layer 11 is arranged in a ring shape around the axis 30 line of the tension roller 100, and the top support assembly 12 is arranged in the inner ring space of the first roller surface layer 11. The top support assembly 12 includes a top support portion 12a and a plurality of fan-shaped portions 12b. The projection of the fan-shaped portion 12b along the axis 30 line of the tension roller 100 is fan-shaped. In the initial state, the plurality of fan-shaped portions 12b can be spliced to form a complete circumferential structure, which can be a cylindrical structure or a circular ring structure. The circumferential structure is circumferentially fitted with the first roller surface layer 11, that is, the outer circumferential surface of the circumferential structure is completely fitted with the inner surface of the first roller surface layer 11. At this time, the projection of the first roller surface layer 11 along the axis 30 line of the tension roller 100 is circular. It can be understood that when all the sectors 12 b are in the initial state, the axial projection of the roll surface of the secondary roll segment 10 and the axial projection of the roll surface of the primary roll segment 20 are on the same circumference.
[0035] The central angles of the sectors 12b can be equal or unequal, as long as they can be spliced into a circular structure in the initial state. In order to simplify the structure of the top support assembly 12, in some examples, the number of the sectors 12b is two. Of course, in other examples, the number of the sectors 12b can also be three, four or more. Specifically, the sector 12b can be, but is not limited to, a sector ring.
[0036] The supporting portion 12a can drive each fan-shaped portion 12b to move in the corresponding radial direction. Regarding the specific structure of the supporting portion 12a, those skilled in the art can make conventional settings, which are not limited here. The supporting portion 12a can drive all the fan-shaped portions 12b to switch from the initial state to the lifting state synchronously. When in the lifting state, each fan-shaped portion 12b will push outward the part of the first roller surface layer 11 that is in contact with itself, and the joint action of all the fan-shaped portions 12b can make the entire first roller surface layer 11 expand and deform.
[0037] In the actual application of the tension roller 100, the coating area 201 of the pole piece 200 is set in the main roller section 20 of the tension roller 100, and the pole lug area 202 of the pole piece 200 is set in the secondary roller section 10 of the tension roller 100. When all the fan-shaped blocks are in the initial state, due to the thin thickness of the pole lug area 202, it is not closely attached to the first roller surface layer 11, which is not conducive to the extension of the pole lug area 202. In order to improve the ductility of the pole lug area 202, in actual operation, the top support part 12a can be controlled to move all the fan-shaped blocks, so that all the fan-shaped blocks can jointly open the first roller surface layer 11 outward, so that the first roller surface layer 11 and the pole lug area 202 can be well attached, and then the pole lug area 202 of the pole piece 200 can also be subjected to the tension of the tension roller 100, and the pole lug area 202 is well extended, which can greatly reduce the problem of fracture and wrinkles in the pole lug area 202 during the rolling process. Compared with the traditional method of attaching Teflon, the solution of the present application is not only easy to operate, saves time and effort, but also can steplessly adjust the lifting distance of the fan-shaped block, so that the first roller surface layer 11 can apply more precise tension to the pole lug area 202, and the extension effect of the pole lug area 202 is better.
[0038] In addition, since all the fan-shaped portions 12b form a circumferential structure that fits the circumference of the first roller surface layer 11 in the initial state, the supporting force exerted by all the fan-shaped portions 12b on the first roller surface layer 11 is evenly distributed, which helps to maintain a good roundness of the first roller surface layer 11. Therefore, the first roller surface layer 11 can provide a more uniform tension to the pole lug area 202, and the pole lug area 202 extends more evenly.
[0039] In some embodiments, reference Figures 1 to 3 The secondary roller segment 10 includes a plurality of deformation zones adjacently arranged along the axis of the tension roller 100 , and the first roller surface layer 11 of each deformation zone is correspondingly provided with an independent supporting assembly 12 .
[0040] The first roller surface layer 11 of each deformation zone should be continuous. Different supporting components 12 are correspondingly arranged for the first roller surface layer 11 of different deformation zones, and each supporting component 12 can independently control the movement of its own fan-shaped portion 12b, so that the first roller surface layer 11 of different deformation zones can be expanded to different degrees.
[0041] It is understandable that when the top support assembly 12 includes multiple top support assemblies, all the fan-shaped portions 12b of each top support assembly 12 can be spliced together to form an independent circular structure.
[0042] In some applications, combined with Figure 1 It is understood that the pole piece 200 may also include an insulating area 203 located in the coating area 201 and the pole lug area 202. Due to the different structures of the insulating area 203 and the pole lug area 202, the required tension may be different. At this time, the tension roller 100 can use the first roller surface layer 11 of different deformation zones to provide different tensions to different areas of the pole lug, adapt to the tension adjustment of different areas of different pole lugs, and adapt to more types of pole pieces 200.
[0043] In some embodiments, please refer to Figure 1 The secondary roll segment 10 includes a first deformation zone q1 and a second deformation zone q2 which are sequentially arranged along the direction away from the primary roll segment 20 along the axis, and the width of the first deformation zone q1 is smaller than the width of the second deformation zone q2.
[0044] The width of the deformation zone refers to the size of the deformation zone in the direction of the axis 30 of the tension roller 100.
[0045] Specifically, in actual application, the first deformation zone q1 is set corresponding to the insulating zone 203 of the pole piece 200, and the second deformation zone q2 is set corresponding to the pole ear zone 202 of the pole piece 200. Usually, the width of the pole ear zone 202 of the pole piece 200 is greater than the width of its insulating zone 203. At this time, the width of the first deformation zone q1 is smaller than the width of the second deformation zone q2, which is more suitable for the structural design of the pole piece 200 and is conducive to the extension effect of the pole ear zone 202 and the insulating zone 203.
[0046] In some embodiments, please refer to Figure 1 The secondary roller segment 10 further includes a third deformation zone q3, which is disposed between the first deformation zone q1 and the second deformation zone q2, and the sum of the widths of the first deformation zone q1 and the third deformation zone q3 is smaller than the width of the second deformation zone q2.
[0047] The first deformation zone q1 is arranged close to the main roller segment 20. In practical application, the first deformation zone q1 and the third deformation zone q3 both support the insulating zone 203 of the pole piece 200, and the deformation degree of the first roller surface layer 11 of the first deformation zone q1, the deformation degree of the first roller surface layer 11 of the second deformation zone q2, and the deformation degree of the first roller surface layer 11 of the third deformation zone q3 can be gradually increased, so as to reduce the influence of the roller surface deformation of the secondary roller segment 10 on the roller surface of the main roller segment 20, and reduce the influence on the tension of the coating zone 201.
[0048] In some embodiments, please refer to Figure 1 and Figure 3The supporting portion 12a includes a plurality of lifting members, each of which is connected to a corresponding sector-shaped portion 12b, and the lifting member can drive the connected sector-shaped portion 12b to move in a corresponding radial direction.
[0049] The plurality of lifting members of the same supporting portion 12a are usually linked. The lifting member can be, but is not limited to, a lifting cylinder. In this case, the supporting portion 12a has a simple structure, which helps to reduce the cost of the tension roller 100.
[0050] In some embodiments, please refer to Figure 1 and Figure 2 The main roller segment 20 includes a second roller surface layer 21, and the second roller surface layer 21 is integrally connected to the first roller surface layer 11. The first roller surface layer 11 and the second roller surface layer 21 are an integrated layer structure, and the two are continuously connected, which helps the tension roller 100 and the pole piece 200 to fit more evenly. It can be understood that when all the fan-shaped portions 12b are in the primary state, the projections of the first roller surface layer 11 and the second roller surface layer 21 along the axis 30 of the tension roller 100 are on the same circumference.
[0051] Of course, in other embodiments, the first roller surface layer 11 and the second roller surface layer 21 may also be provided independently. The second roller surface layer 21 may also be made of a non-deformable material such as hard plastic.
[0052] In some embodiments, please refer to Figure 2 The supporting roller portion 22 is a rotating structure around the axis of the tension roller 100 , and the second roller surface layer 21 is attached to the outer periphery of the supporting roller portion 22 .
[0053] The support roller portion 22 may be cylindrical or columnar. The support roller portion 22 and the second roller surface layer 21 may be connected in an integral manner or by bonding or other methods. At this time, the support roller portion 22 supports the second roller surface layer 21 to maintain a circumferential state, which can improve the strength of the tension roller 100. Moreover, the support roller portion 22 can reduce the probability of deformation of the edge of the second roller surface layer 21 driven by the first roller surface layer 11, which helps to maintain the uniformity of tension at various locations of the main roller segment 20 of the tension roller 100.
[0054] In some embodiments, please refer to Figures 1 to 3 The tension roller 100 further includes a roller shaft 30, on which the supporting roller portion 22 and the top support portion 12a are both disposed. The roller shaft 30 is used to connect to an external driving mechanism, and the external driving mechanism is used to drive the tension roller 100 to rotate. It can be understood that during the rotation of the tension roller, the top support assembly 12, the supporting roller portion 22, the first roller surface layer 11, and the second roller surface layer 21 rotate synchronously with the roller shaft 30.
[0055] In some embodiments, please refer to Figures 1 to 3, two secondary roller segments 10 are configured, and the two secondary roller segments 10 are arranged on both sides of the main roller segment 20. In actual application, pole tab areas 202 are set on both sides of the pole piece 200, and two sub-pole pieces 200 can be obtained by subsequent cutting. At this time, the two secondary roller segments 10 can simultaneously extend the two pole tab areas 202 of the same pole piece 200, which can meet the production requirements of pole tabs and improve the production efficiency of pole tabs.
[0056] In one embodiment of the present application, the tension roller 100 includes a main roller segment 20 and secondary roller segments 10 arranged on both sides of the main roller segment 20. Each secondary roller segment 10 includes a supporting assembly 12 and a first roller surface layer 11, and the main roller segment 20 includes a second roller surface layer 21, and the first roller surface layer 11 and the second roller surface layer 21 are connected as one. The supporting assembly 12 includes a supporting portion 12a and a plurality of fan-shaped portions 12b, and all the fan-shaped portions 12b have an initial form that can be spliced to form a circumferential structure, and the circumferential structure is circumferentially fitted with the first roller surface layer 11. The supporting portion 12a can drive the corresponding plurality of fan-shaped portions 12b to move in their respective radial directions to switch between the lifting states of lifting the first roller surface layer 11 to cause it to deform.
[0057] In addition, an embodiment of the present application further provides a rolling device, including at least one pair of rolling members, and in each pair of rolling members, at least one rolling member is the tension roller 100 in the above embodiment.
[0058] In addition, an embodiment of the present application also provides a battery production system, including the above-mentioned rolling equipment, which is used to prepare battery pole pieces 200.
[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0060] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.
Claims
1. A tension roller, characterized in that: The invention comprises a secondary roller segment (10) and a primary roller segment (20) which are adjacently arranged along the axis direction of the tension roller; the secondary roller segment (10) comprises a supporting assembly (12) and a deformable first roller surface layer (11), wherein the first roller surface layer (11) surrounds the axis of the tension roller and is enclosed at the periphery of the supporting assembly (12); The supporting assembly (12) comprises a supporting portion (12a) and a plurality of fan-shaped portions (12b), each of the fan-shaped portions (12b) being located in a different radial direction of the tension roller, and all of the fan-shaped portions (12b) are in an initial state capable of being spliced into a circumferential structure, and the circumferential structure is circumferentially fitted with the first roller surface layer (11); The supporting portion (12a) can drive all the fan-shaped portions (12b) to reciprocate along the corresponding radial direction, so that all the fan-shaped portions (12b) can switch between the initial state and the lifting state capable of lifting the first roller surface layer (11) so that it deforms relative to the roller surface of the main roller segment (20).
2. The tension roller according to claim 1, characterized in that: The secondary roller segment (10) comprises a plurality of deformation zones arranged adjacent to each other along the axis of the tension roller; the first roller surface layer (11) of each deformation zone is correspondingly provided with an independent supporting assembly (12).
3. The tension roller according to claim 2, characterized in that: The secondary roll segment (10) comprises a first deformation zone (q1) and a second deformation zone (q2) which are arranged in sequence along the axis in a direction away from the primary roll segment (20); the width of the first deformation zone (q1) is smaller than the width of the second deformation zone (q2).
4. The tension roller according to claim 3, characterized in that: The secondary roller segment (10) further includes a third deformation zone (q3), wherein the third deformation zone (q3) is arranged between the first deformation zone (q1) and the second deformation zone (q2); the sum of the widths of the first deformation zone (q1) and the third deformation zone (q3) is smaller than the width of the second deformation zone (q2).
5. The tension roller according to claim 1, characterized in that: The supporting portion (12a) comprises a plurality of lifting members, each of the lifting members is correspondingly connected to a sector-shaped portion (12b), and the lifting members are capable of driving the connected sector-shaped portion (12b) to move in a corresponding radial direction.
6. The tension roller according to claim 1, characterized in that: The main roller segment (20) comprises a second roller surface layer (21), and the second roller surface layer (21) is integrally connected to the first roller surface layer (11).
7. The tension roller according to claim 6, characterized in that: The main roller segment (20) further comprises a supporting roller portion (22), the supporting roller portion (22) being in a rotating structure around the axis of the tension roller, and the second roller surface layer (21) being attached to the outer periphery of the supporting roller portion (22).
8. The tension roller according to claim 1, characterized in that: The secondary roller segments (10) are configured in two, and the two secondary roller segments (10) are arranged on both sides of the main roller segment (20).
9. A rolling device, characterized in that: The rolling device comprises at least one pair of rolling members, and in each pair of the rolling members, at least one of the rolling members is the tension roller according to any one of claims 1 to 8.
10. A battery production system, characterized in that: The battery production system includes the rolling apparatus according to claim 9.