A flattening roller for a winder diaphragm
By using a flattening roller with an interlaced spiral groove design on the winding machine, the problem of wrinkles during the diaphragm winding process is solved, achieving efficient flattening of the diaphragm and improving battery quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HIGHPOWER TECH CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-07
Smart Images
Figure CN224467148U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to a flattening roller for a diaphragm in a winding machine. Background Technology
[0002] The separator is a major component of the inner layer of a battery, and its performance plays a decisive role in key indicators such as battery capacity, cycle performance, and installation performance.
[0003] Existing winding machines frequently experience wrinkles in the inner diaphragm during the winding process. Research has revealed that under tensile stress, longitudinal wrinkles appear between the diaphragm and the diaphragm roller. The larger the spatial distance, the more severe the wrinkles, posing a significant quality risk to battery production and preventing it from meeting practical application requirements. Utility Model Content
[0004] This utility model provides a flattening roller for a diaphragm in a winding machine to solve the problem that battery production has significant quality risks, causing it to fail to meet practical application requirements.
[0005] This utility model discloses a flattening roller for a diaphragm in a winding machine, comprising: a flattening roller body, the flattening roller body being cylindrical, and at least one set of spiral grooves being formed on the outer periphery of the flattening roller body along its length direction, the spiral grooves including forward spiral grooves and reverse spiral grooves, and multiple intersections being formed between the forward spiral grooves and the reverse spiral grooves, the pitch of the spiral grooves being 20mm~30mm.
[0006] Optionally, the number of the positive spiral grooves is one to four.
[0007] Optionally, the number of anti-rotation grooves is one to four.
[0008] Optionally, both the forward-rotating groove and the reverse-rotating groove are provided in three-head configurations.
[0009] Optionally, the depth of the positive spiral groove is h, and the range of h is 0.1 mm to 0.6 mm.
[0010] Optionally, the flattening roller body is a hollow structure, and mounting grooves are provided at both ends of the flattening roller body.
[0011] Optionally, the flattening roller body is manufactured using a 70-90 mesh sandblasting process combined with ultra-hard anodizing, with a grade of Sa2 to Sa2.5.
[0012] Optionally, the spiral groove transitions smoothly with the flattening roller body.
[0013] Optionally, the starting points of the forward-rotating groove and the reverse-rotating groove are set synchronously.
[0014] Optionally, the dynamic balance of the flattening roller body is ≤0.2g.
[0015] The beneficial effects of the flattening roller for the diaphragm of the winding machine provided in this embodiment are as follows: The flattening roller body is cylindrical, which ensures uniform contact with the diaphragm during the winding process and avoids uneven stress on the diaphragm due to irregular shape. The positive and negative spiral grooves formed along the length of the flattening roller body are interlaced. When the diaphragm passes on the flattening roller, a lateral spreading force is applied to the diaphragm, achieving a flattening effect and reducing the formation of longitudinal wrinkles. Simultaneously, the pitch of the spiral grooves is limited to 20mm to 30mm, which ensures a flattening effect while controlling the degree of diaphragm wear to a low level, improving the flattening quality of the diaphragm, reducing potential battery quality issues caused by diaphragm wrinkles, increasing battery yield, and meeting application requirements. Attached Figure Description
[0016] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings:
[0017] Figure 1 This is a schematic diagram of the overall structure of the flattening roller for the diaphragm of a winding machine according to an embodiment of the present invention;
[0018] Figure 2 This is a side view of the flattening roller used for the diaphragm of a winding machine according to an embodiment of the present invention.
[0019] The labels for the attached figures are as follows:
[0020] 10. Flattening roller body; 111. Forward swirl groove; 112. Reverse swirl groove. Detailed Implementation
[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0022] This utility model embodiment provides a flattening roller for a diaphragm in a winding machine, such as... Figure 1 As shown, it includes: a flattening roller body 10, which is cylindrical. Along its length, at least one set of spiral grooves are formed on the outer periphery of the flattening roller body 10. The spiral grooves include a forward spiral groove 111 and a reverse spiral groove 112, and multiple intersections are formed between the forward spiral groove 111 and the reverse spiral groove 112. The pitch of the spiral grooves is 20mm~30mm.
[0023] The flattening roller body 10 is cylindrical to ensure uniform contact with the diaphragm during winding, avoiding uneven stress on the diaphragm due to irregular shape. The forward and reverse spiral grooves 111 and 112, formed along the length of the flattening roller body 10, are staggered. When the diaphragm passes on the flattening roller, a lateral spreading force is applied to the diaphragm, flattening it and reducing longitudinal wrinkles. Simultaneously, the pitch of the spiral grooves is set to 20mm to 30mm, ensuring flattening while keeping diaphragm wear to a low level, improving diaphragm flattening quality, reducing battery quality issues caused by diaphragm wrinkles, increasing battery yield, and meeting application requirements.
[0024] As a preferred embodiment, the number of positive spiral grooves 111 is 1 to 4.
[0025] The limitation on the number of positive swirl grooves 111 enhances the adaptability and flexibility of the flattening roller design. Different types of battery production may use separators with different properties. By adjusting the number of positive swirl grooves 111, the flattening roller can better meet various production needs. For example, for high-end battery production with high requirements for separator flattening, increasing the number of positive swirl grooves 111 ensures higher flattening accuracy; while for ordinary battery production, appropriately reducing the number of positive swirl grooves 111 can reduce the manufacturing cost of the flattening roller while maintaining a certain flattening effect. This flexibility improves the applicability of the flattening roller in different battery production scenarios, expands its application range, and helps improve the production efficiency and product quality of the entire battery manufacturing industry.
[0026] As a preferred embodiment, the number of anti-rotation grooves 112 is 1 to 4.
[0027] The limitation on the number of anti-rotation grooves 112 enhances the adaptability and flexibility of the flattening roller design. Different types of battery production may use separators with different characteristics. By adjusting the number of anti-rotation grooves 112, the flattening roller can better meet various production needs. For example, for high-end battery production with high requirements for separator flattening, increasing the number of anti-rotation grooves 112 ensures higher flattening accuracy; while for ordinary battery production, appropriately reducing the number of anti-rotation grooves 112 can reduce the manufacturing cost of the flattening roller while maintaining a certain flattening effect. This flexibility improves the applicability of the flattening roller in different battery production scenarios, expands its application range, and helps improve the production efficiency and product quality of the entire battery manufacturing industry.
[0028] As a preferred embodiment, both the forward-rotating groove 111 and the reverse-rotating groove 112 are provided with three heads.
[0029] Both the forward-rotating groove 111 and the reverse-rotating groove 112 are arranged in a three-head configuration, providing a stable and efficient solution for separator flattening. In actual battery production, this configuration can significantly improve the flattening accuracy and stability of the separator, reducing battery quality problems caused by separator wrinkles.
[0030] As a preferred embodiment, the depth of the spiral groove is h, and the range of h is 0.1mm to 0.6mm.
[0031] The aforementioned limitation on the depth of the spiral grooves effectively protects the performance of the separator while ensuring its flattening effect. This reduces wear on the separator during the flattening process and prevents battery performance degradation due to surface damage.
[0032] As a preferred embodiment, the flattening roller body 10 has a hollow structure, and grooves are installed at both ends of the flattening roller body 10.
[0033] The hollow structure of the flattening roller body 10 has two main advantages. First, the hollow structure reduces the weight of the flattening roller and its moment of inertia, allowing it to rotate more flexibly during operation, reducing power consumption and improving the operating efficiency of the winding machine. Second, the hollow structure also facilitates the installation of the flattening roller; the mounting slots at both ends can be easily connected and fixed to other components of the winding machine, ensuring the stability of the flattening roller during operation.
[0034] As a preferred embodiment, the flattening roller body 10 adopts a 70 to 90 mesh sandblasting combined with ultra-hard anodizing process, with a grade of Sa2 to Sa2.5.
[0035] The 70-90 mesh sandblasting process creates a certain roughness on the surface of the flattening roller, increasing the friction between the diaphragm and the roller, allowing the diaphragm to pass more stably and preventing slippage. The ultra-hard anodizing process forms a hard, wear-resistant oxide film on the surface of the flattening roller, improving its wear and corrosion resistance. Sandblasting at Sa2-Sa2.5 grades ensures the surface roughness of the flattening roller reaches a suitable level, providing sufficient friction without damaging the diaphragm surface. This combination of surface treatment processes significantly improves the performance and service life of the flattening roller, enabling it to maintain good working condition even in harsh production environments.
[0036] This embodiment can be an 80-mesh sandblasting process combined with ultra-hard anodizing, with a grade of Sa2.5.
[0037] As a preferred embodiment, the spiral groove and the flattening roller body 10 have a smooth transition.
[0038] If the transition between the spiral groove and the flattening roller body 10 is not smooth enough, and has sharp edges or protrusions, these uneven parts may scratch the diaphragm surface when the diaphragm passes through the flattening roller, affecting the diaphragm's performance and quality. A smooth transition design ensures smoother contact between the diaphragm and the flattening roller surface as the diaphragm passes through, reducing the risk of friction and damage to the diaphragm, guaranteeing its integrity and performance, and ultimately improving battery performance.
[0039] As a preferred embodiment, the starting points of the forward-rotating groove 111 and the reverse-rotating groove 112 are set synchronously.
[0040] The synchronous setting of the starting points of the positive swirl groove 111 and the negative swirl groove 112 ensures that the force exerted on the diaphragm by the positive swirl groove 111 and the negative swirl groove 112 is synchronous and balanced when the diaphragm enters the flattening roller, which further optimizes the flattening performance of the flattening roller on the diaphragm.
[0041] As a preferred embodiment, the dynamic balance of the flattening roller body 10 is ≤0.2g.
[0042] The dynamic balance of the flattening roller body 10 is limited to ≤0.2g. The vibration generated during the high-speed (1900r / min) operation of the flattening roller is minimal. When the diaphragm passes over the flattening roller, it will not be subjected to additional unstable forces due to the roller's vibration. This ensures that the diaphragm maintains uniform stress throughout the flattening process, avoiding problems such as localized stretching and wrinkling caused by vibration, further improving the flattening accuracy and quality of the diaphragm, thereby enhancing battery performance.
[0043] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of this utility model.
Claims
1. A flattening roller for a diaphragm in a winding machine, characterized in that, include: The flattening roller body is cylindrical, and at least one set of spiral grooves is formed on the outer periphery of the flattening roller body along its length direction. The spiral grooves include forward spiral grooves and reverse spiral grooves, and multiple intersections are formed between the forward spiral grooves and the reverse spiral grooves. The pitch of the spiral grooves is 20mm~30mm.
2. The flattening roller for a diaphragm in a winding machine according to claim 1, characterized in that, The number of the positive spiral grooves is one to four.
3. The flattening roller for a diaphragm in a winding machine according to claim 2, characterized in that, The number of anti-rotation grooves is one to four.
4. The flattening roller for a diaphragm in a winding machine according to claim 3, characterized in that, Both the forward-rotating groove and the reverse-rotating groove are provided in three-head configurations.
5. The flattening roller for a diaphragm in a winding machine according to claim 4, characterized in that, The depth of the positive spiral groove is h, and the range of h is 0.1 mm to 0.6 mm.
6. The flattening roller for a diaphragm in a winding machine according to claim 5, characterized in that, The flattening roller body is a hollow structure, and mounting grooves are provided at both ends of the flattening roller body.
7. The flattening roller for a diaphragm in a winding machine according to claim 6, characterized in that, The flattening roller body is manufactured using a 70-90 mesh sandblasting process combined with ultra-hard anodizing, and is classified as Sa2~Sa2.5 grade.
8. The flattening roller for a diaphragm in a winding machine according to claim 7, characterized in that, The spiral groove transitions smoothly with the flattening roller body.
9. The flattening roller for a diaphragm in a winding machine according to claim 8, characterized in that, The starting points of the forward and reverse spiral grooves are set synchronously.
10. The flattening roller for a diaphragm in a winding machine according to claim 9, characterized in that, The dynamic balance of the flattening roller body is ≤0.2g.