Compound roller and compound machine
Patent Information
- Application Number
- CN202522063395.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-09-25
AI Technical Summary
[0002]锂离子电池的极片在制造过程中，通常需要经过复合机，将极片与其他功能膜片（如固态电解质膜、补锂层等）的多层叠片进行热复合后成型，避免片与片之间松散，复合机通过复合胶辊对多层叠片进行挤压和加热，复合胶辊内层的辊体的周侧表面包胶设置，对叠片起到一定的缓冲作用，防止叠片被压坏，辊体周侧表面一般为粗打磨方式，再包胶，这种形式，在高温高压的情况下，胶层容易与辊体产生脱落现象，造成复合异常，影响产品性能
[0021]本实用新型提供一种复合胶辊，通过在辊体的周侧开设若干条螺旋状的凹槽，一方面，凹槽能够容置部分胶层，具体而言，凹槽的底壁和两个侧壁都相应地增大了与胶层之间的接触面积，进而增大胶层与辊体之间的结合力，另一方面，凹槽呈螺旋状设置，在辊体的长度一定的情况下，该形状可以延长凹槽的长度，更进一步增大凹槽与胶层的接触面积，进一步增大与辊体之间的结合力，在高温高压的情况下，该复合胶辊也能长时间工作，避免发生胶层脱落的情况。
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Figure CN224789685U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a composite rubber roller and a composite machine. Background Technology
[0002] During the manufacturing process of lithium-ion batteries, the electrodes typically need to be laminated using a laminating machine. This process involves thermally laminating multiple layers of electrodes with other functional films (such as solid electrolyte membranes and lithium replenishment layers) to prevent them from becoming loose. The laminating machine uses laminating rollers to compress and heat the multi-layered laminates. The inner layer of the laminating roller is coated with adhesive to provide a buffer and prevent the laminates from being crushed. The outer surface of the roller is usually coarsely polished before being coated with adhesive. Under high temperature and pressure, the adhesive layer is prone to detaching from the roller, causing lamination abnormalities and affecting product performance.
[0003] Therefore, there is an urgent need to design a composite rubber roller and a composite machine to solve the above problems. Utility Model Content
[0004] One objective of this invention is to provide a composite rubber roller that increases the contact area between the rubber layer and the roller body, thereby improving the bonding force between the rubber layer and the roller body, making the rubber layer less prone to falling off, and extending the service life of the composite rubber roller.
[0005] Another objective of this invention is to provide a laminating machine in which the adhesive layer of the laminating roller is less likely to fall off and has a longer service life.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] Composite rubber rollers, including:
[0008] The roller body is cylindrical, and several spiral grooves are formed on the circumferential surface of the roller body. The grooves extend spirally from one end of the roller body to the other end of the roller body.
[0009] An adhesive layer covers the periphery of the roller body, and a portion of the adhesive layer is accommodated in the groove.
[0010] As an alternative, the side walls and bottom wall of the aforementioned groove are smooth surfaces; or
[0011] At least one of the bottom wall of the aforementioned groove and the two side walls of the aforementioned groove forms an uneven structure.
[0012] As an optional solution, the depth of the groove is D1, where 3.0mm≤D1≤5.0mm.
[0013] As an alternative, the above-mentioned concave-convex structure is a sawtooth, the depth of the sawtooth is D2, 0mm<D2≤5.0mm, and the interval between the tops of two adjacent sawtooths is L, 1.0mm≤L≤3.0mm.
[0014] As an alternative, the width of the groove is defined as W1, and the width of two adjacent grooves is defined as W2, where 0.5 ≤ W2 / W1 ≤ 3.3.
[0015] As an alternative, 3.0mm≤W1≤8.0mm, 3.0mm≤W2≤10.0mm.
[0016] As an alternative, the angle between the tangent of the extension direction of the groove and the axis of the roller body is α, where 10°≤α≤80°.
[0017] As an alternative, the surface of the roller body is provided with several protrusion structures.
[0018] As an optional solution, the height of the protrusion structure protruding from the circumference of the roller body is H, where H ≤ 1.0 mm, and the maximum dimension of the protrusion structure on the circumference of the roller body is less than or equal to 1.0 mm.
[0019] A laminating machine, including the aforementioned laminating rollers.
[0020] The beneficial effects of this utility model are as follows:
[0021] This invention provides a composite rubber roller. By opening several spiral grooves on the periphery of the roller body, the grooves can accommodate part of the rubber layer. Specifically, the bottom wall and two side walls of the grooves are correspondingly increased to increase the contact area with the rubber layer, thereby increasing the bonding force between the rubber layer and the roller body. On the other hand, the spiral shape of the grooves can extend the length of the grooves when the length of the roller body is fixed, further increasing the contact area between the grooves and the rubber layer, and further increasing the bonding force between them. Under high temperature and high pressure, this composite rubber roller can also work for a long time without the rubber layer falling off.
[0022] This utility model also provides a laminating machine, including the aforementioned laminating roller. By employing the aforementioned laminating roller to thermally laminate the electrode sheets, the adhesive layer on the laminating roller is less prone to peeling off, resulting in a longer service life. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of the composite rubber roller provided in Embodiment 1 of this utility model;
[0024] Figure 2 This is a schematic diagram of the roller body provided in Embodiment 1 of this utility model;
[0025] Figure 3 yes Figure 2 Enlarged view of point B in the middle;
[0026] Figure 4 This is an enlarged view of the end face structure of the roller body with an uneven structure on the bottom wall, as provided in Embodiment 2 of this utility model. Figure 1 ;
[0027] Figure 5 This is an enlarged view of the end face structure of the roller body with an uneven structure on the bottom wall, as provided in Embodiment 2 of this utility model. Figure 2 ;
[0028] Figure 6 This is an enlarged view of the end face structure of the roller body provided in Embodiment 2 of this utility model, where both side walls and the bottom wall are provided with concave and convex structures. Figure 1 ;
[0029] Figure 7 This is an enlarged view of the end face structure of the roller body provided in Embodiment 2 of this utility model, where both side walls and the bottom wall are provided with concave and convex structures. Figure 2 .
[0030] In the picture:
[0031] 10. Roller body; 11. Groove; 111. Side wall; 112. Bottom wall; 113. Concave-convex structure; 20. Adhesive layer. Detailed Implementation
[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0035] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0036] Example 1
[0037] This embodiment provides a composite rubber roller that increases the contact area between the rubber layer 20 and the roller body 10, thereby improving the bonding force between the rubber layer 20 and the roller body 10, making the rubber layer 20 less prone to detachment, and extending the service life of the composite rubber roller. Figures 1-3 As shown, the composite rubber roller includes a roller body 10 and a rubber layer 20. The roller body 10 is cylindrical, and several spiral grooves 11 are formed on the circumferential surface of the roller body 10. The grooves 11 extend from one end of the roller body 10 to the other end of the roller body 10. The rubber layer 20 covers the circumferential side of the roller body 10, and part of the rubber layer 20 is accommodated in the grooves 11. The aforementioned composite rubber roller has several spiral grooves 11 formed on the periphery of the roller body 10. On the one hand, the grooves 11 can accommodate part of the rubber layer 20. Specifically, the bottom wall 112 and the two side walls 111 of the groove 11 are correspondingly increased to increase the contact area with the rubber layer 20, thereby increasing the bonding force between the rubber layer 20 and the roller body 10. On the other hand, the grooves 11 are spirally arranged. With a fixed length of the roller body 10, this shape can extend the length of the grooves 11, further increasing the contact area between the grooves 11 and the rubber layer 20, and further increasing the bonding force between them and the roller body 10. Under high temperature and high pressure, the composite rubber roller can also work for a long time and avoid the rubber layer 20 from falling off.
[0038] Optionally, in this embodiment, as Figure 3 As shown, the two side walls 111 and the bottom wall 112 of the groove 11 are smooth surfaces. This design makes the machining of the groove 11 easier.
[0039] Optionally, the depth of the groove 11 is D1, where 3.0mm ≤ D1 ≤ 5.0mm. Within this range, the depth of the groove 11 ensures that the adhesive layer 20 can enter most of the groove 11. It is understood that if the groove is deeper, the adhesive layer 20, due to its limited fluidity, will not penetrate too deeply into the groove 11. Therefore, the maximum depth of the groove 11 is controlled to 5.0mm. When the depth of the groove 11 is less than 3.0mm, its effect on increasing the contact area with the adhesive layer 20 is not significant. For example, the value of D1 can be 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc., and is not limited here.
[0040] Optionally, the width of the groove 11 is defined as W1, and the width of two adjacent grooves 11 is defined as W2, where 0.5 ≤ W2 / W1 ≤ 3.3. Within this ratio range, the grooves 11 are neither too dense nor too sparse; preferably, 1 ≤ W2 / W1 ≤ 2. This ensures sufficient wall thickness between adjacent grooves 11 after they are created on the outer side of the roller 10, while appropriately increasing the contact area with the adhesive layer 20. For example, the values of W2 / W1 can be 0.5, 0.7, 0.9, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0, 2.2, 2.4, 2.6, 2.8, 3.0, 3.3, etc.
[0041] Optionally, 3.0mm ≤ W1 ≤ 8.0mm, 3.0mm ≤ W2 ≤ 10.0mm. It should be noted that the values are selected while still satisfying the range of the ratio between the two. For example, the values of W1 can be 3.0, 3.2, 3.5, 3.7, 4.0, 4.2, 4.4, 4.8, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, etc., and the values of W2 can be 3.0, 3.2, 3.5, 3.7, 4.0, 4.2, 4.4, 4.8, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, etc.
[0042] Optionally, the angle between the tangent of the extending direction of the groove 11 and the axis of the roller body 10 is α, where 10° ≤ α ≤ 80°. Within this range, it is ensured that each groove 11 rotates a large number of times on the circumference of the roller body 10. It should be noted that for the same spiral groove 11, the angle between α and the axis of the roller body 10 is the same at any position. For example, the value of α can be 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, etc.
[0043] Optionally, the surface of the roller body 10 is provided with a number of raised structures (not shown in the figure). It is understood that raised structures can be provided at the positions on the circumference of the roller body 10 where the groove 11 is not provided. The raised structures include, but are not limited to, protruding circular, sawtooth, rectangular, and trapezoidal protrusions, to further increase the contact area with the adhesive layer 20 and increase the bonding force.
[0044] Optionally, the height of the protrusion of the protrusion structure from the circumference of the roller body 10 is H, where H ≤ 1.0 mm. In other words, the protrusion structure cannot be made too high to avoid occupying too much thickness of the adhesive layer 20. The maximum size of the protrusion structure on the circumference of the roller body 10 is less than or equal to 1.0 mm. That is to say, the size of the protrusion structure cannot be made too large, as this is not conducive to the bonding between the protrusion structure and the adhesive layer 20.
[0045] This embodiment also provides a laminating machine, including the aforementioned laminating roller. By employing the aforementioned laminating roller to thermally laminate the electrode sheets, the adhesive layer 20 of the laminating roller is less prone to peeling off, resulting in a longer service life.
[0046] The heating function of composite rubber rollers is commonly used in existing technologies and will not be elaborated here.
[0047] Example 2
[0048] This embodiment is largely the same in structure as Embodiment 1, and the similarities will not be repeated. The difference lies in that at least one of the bottom wall 112 and the two side walls 111 of the groove 11 forms a concave-convex structure 113. Figure 4 and Figure 5 Only the bottom wall 112 of the groove 11 forms an uneven structure 113. Figure 6 and Figure 7 The bottom wall 112 and both side walls 111 are formed with an uneven structure 113. Alternatively, in another embodiment, one side wall 111 may have an uneven structure 113, or one side wall 111 and the bottom wall 112 may form an uneven structure 113; this is not limited here. Through the above arrangement, the uneven structure 113 further increases the surface area of the sidewall of the groove 11, resulting in a stronger bond when bonded to the adhesive layer 20. Figure 6 and Figure 7 In one embodiment, the sidewall 111 forms a concave-convex structure 113. After the adhesive layer 20 fills the groove 11, the concave-convex structure 113 forms a negative angle with the adhesive layer 20, which better prevents the adhesive layer 20 that has entered the groove 11 from coming out of the groove 11.
[0049] Optionally, the concave-convex structure 113 is serrated, with a serration depth of D2, where 0mm < D2 ≤ 5.0mm. Since the depth of the groove 11 ranges from 3mm to 5mm, for... Figure 4 and Figure 5In one embodiment, the serration depth can be approximately equal to the depth of the groove 11, and the distance between the tops of two adjacent serrations is L, 1.0mm≤L≤3.0mm, to ensure clear serrations and easy processing.
[0050] In another embodiment, the concave-convex structure 113 may also be formed by protrusions on the inner wall of the groove 11, which is not limited here.
[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A composite rubber roller, characterized in that, include: The roller body (10) is columnar, and several spiral grooves (11) are opened on the circumferential surface of the roller body (10). The grooves (11) extend spirally from one end of the roller body (10) to the other end of the roller body (10). An adhesive layer (20) covers the periphery of the roller body (10), and a portion of the adhesive layer (20) is contained in the groove (11).
2. The composite rubber roller according to claim 1, characterized in that, The two side walls (111) and the bottom wall (112) of the groove (11) are smooth surfaces; or At least one of the bottom wall (112) of the groove (11) and the two side walls (111) of the groove (11) forms an uneven structure (113).
3. The composite rubber roller according to claim 2, characterized in that, The depth of the groove (11) is D1, 3.0mm≤D1≤5.0mm.
4. The composite rubber roller according to claim 3, characterized in that, The concave-convex structure (113) is a sawtooth, the depth of the sawtooth is D2, 0mm<D2≤5.0mm, and the interval between the tops of two adjacent sawtooths is L, 1.0mm≤L≤3.0mm.
5. The composite rubber roller according to any one of claims 1-4, characterized in that, The width of the groove (11) is defined as W1, and the width of two adjacent grooves (11) is defined as W2, where 0.5 ≤ W2 / W1 ≤ 3.
3.
6. The composite rubber roller according to claim 5, characterized in that, 3.0mm≤W1≤8.0mm, 3.0mm≤W2≤10.0mm.
7. The composite rubber roller according to any one of claims 1-4, characterized in that, The angle between the tangent of the extending direction of the groove (11) and the axis of the roller (10) is α, where 10°≤α≤80°.
8. The composite rubber roller according to any one of claims 1-4, characterized in that, The surface of the roller (10) is provided with a number of protrusion structures.
9. The composite rubber roller according to claim 8, characterized in that, The height of the protrusion of the protrusion structure on the circumference of the roller body (10) is H, where H ≤ 1.0 mm, and the maximum dimension of the protrusion structure on the circumference of the roller body (10) is less than or equal to 1.0 mm.
10. A composite machine, characterized in that, Including the composite rubber roller as described in any one of claims 1-9.