A multi-stage stretching mechanism and roller pressing system

Abstract

This application discloses a multi-stage stretching mechanism and a rolling system, relating to the field of battery manufacturing technology. The multi-stage stretching mechanism includes a calendering assembly and a stretching assembly; the calendering assembly and the stretching assembly are sequentially distributed; the stretching assembly includes at least three stepped rollers; each stepped roller is sequentially and alternately distributed on both sides of a preset distribution line and is parallel to each other. The stretching assembly constructed by the staggered distribution of the three stepped rollers can achieve force processing in different directions, thereby reducing or homogenizing the tension of the strip; while the design of the calendering assembly can prevent the strip from slipping, thus avoiding the problem of uneven tension caused by slippage, ultimately improving overall production efficiency.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a multi-stage stretching mechanism and rolling system. Background Technology

[0002] In electrode manufacturing, foil calendering is a crucial step. This process typically includes unwinding, rolling, and rewinding to ensure the foil or electrode achieves the required thickness and surface quality. However, in actual production, rolled electrodes often exhibit wrinkling and unevenness, which severely impacts subsequent processes such as winding. To address these issues, a stretching mechanism is usually incorporated into the rolling unit to improve the uniformity of the strip's extension and reduce wrinkling.

[0003] While the addition of a stretching mechanism has addressed the problem to some extent, existing technologies still have some shortcomings. First, the stretching mechanism is typically located downstream of the rolling mechanism or between the unwinding and rolling mechanisms. However, this arrangement can easily lead to slippage and wrinkling of the strip during the stretching process due to uneven stress. Second, due to the characteristics of the strip material, the stretching mechanism is prone to slippage during operation, further exacerbating the problem of uneven tension.

[0004] Therefore, in response to the above problems, there is an urgent need to propose a new solution to improve the uniformity of the strip's extension during the rolling process, reduce wrinkling, and thus improve the overall manufacturing quality and production efficiency of the electrode sheets. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a multi-stage stretching mechanism and rolling system to improve the uniformity of the strip's extension during the rolling process, reduce wrinkling, and thus improve the overall manufacturing quality and production efficiency of the electrode sheet.

[0006] To achieve the above technical objectives, this application provides a multi-stage stretching mechanism, including a calendering assembly and a stretching assembly;

[0007] The calendering assembly and the stretching assembly are distributed sequentially.

[0008] The stretching assembly includes at least three stepped rollers;

[0009] Each of the stepped rollers is staggered and parallel to each other on both sides of the preset distribution line.

[0010] Furthermore, the calendering assembly includes a pressure roller, a main drive roller, and a roller driver;

[0011] The pressure roller is arranged axially parallel to the main drive roller;

[0012] The roller driver is connected to the main drive roller and is used to drive the main drive roller to rotate so that the material belt passes between the pressure roller and the main drive roller;

[0013] The tangent line at the position where the pressure roller contacts the material belt forms the preset distribution line.

[0014] Furthermore, the surface of the pressure roller is covered with a buffer layer.

[0015] Furthermore, it also includes tension components;

[0016] The tension component is disposed between the calendering component and the stretching component and is used to adjust the tension of the strip.

[0017] Furthermore, the tension assembly includes a tension roller and a tension driver;

[0018] The tension driver is connected to the tension roller and is used to drive the tension roller to oscillate.

[0019] Furthermore, the tension component is positioned below the calendering component and the stretching component.

[0020] Furthermore, it also includes institutional carriers;

[0021] The calendering assembly, the stretching assembly, and the tension assembly are mounted on the mechanism carrier.

[0022] Furthermore, the bottom of the mechanism carrier is provided with a leveling cup.

[0023] This application also discloses a roller pressing system, including a roller press and the aforementioned multi-stage stretching mechanism;

[0024] The multi-stage stretching mechanism is configured on the input side of the roller press, and / or the multi-stage stretching mechanism is configured on the output side of the roller press.

[0025] Furthermore, the multi-stage stretching mechanism is respectively configured on the input side and the output side of the roller press;

[0026] The two multi-stage stretching mechanisms are arranged in a mirror image relative to the roller press.

[0027] As can be seen from the above technical solutions, the multi-stage tensioning mechanism designed in this application has the following beneficial effects:

[0028] 1. By staggering at least three stepped rollers on both sides of a pre-defined distribution line, a unique multi-stage stretching structure is constructed. This layout allows the tension on the strip to be distributed in different directions during the stretching process, achieving force processing in different directions to reduce or homogenize the strip tension. This reduction and homogenization of strip tension minimizes wrinkling, ensuring the strip remains flat during stretching. This avoids wrinkling and significantly improves the quality and yield of the electrode sheets.

[0029] 2. Due to the improved quality of electrode manufacturing, the defect rate during the production process is reduced, eliminating the need for rework or scrapping of a large number of defective products. This saves production time and raw material costs, improves the overall manufacturing quality and production efficiency of the electrodes, and ultimately increases overall production efficiency.

[0030] 3. The design of the calendering assembly can prevent the material strip from slipping, thereby avoiding the problem of uneven tension caused by slippage. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a structural schematic diagram of a multi-stage tensioning mechanism provided in this application;

[0033] Figure 2 This is a schematic diagram of the structure of a roller pressing system provided in this application;

[0034] In the diagram: 1. Calendering assembly; 11. Pressure roller; 111. Buffer layer; 12. Main drive roller; 2. Tensioning assembly; 21. Stepped roller; 22. Preset distribution line; 3. Tension assembly; 31. Tension roller; 32. Tension driver; 4. Mechanism carrier; 41. Leveling cup; 5. Material strip; 6. Roller press. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of this application.

[0036] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, 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 the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0038] This application discloses a multi-stage tensioning mechanism.

[0039] Please see Figure 1 One embodiment of a multi-stage tensioning mechanism provided in this application includes:

[0040] Calendering assembly 1 and stretching assembly 2.

[0041] The calendering assembly 1 is distributed sequentially with the stretching assembly 2 along the preset conveying direction of the material belt 5. The calendering assembly 1 has the functions of traction and calendering. According to its distribution position relative to the roller press 6, it can be divided into input side (front) calendering and output side (rear) calendering.

[0042] The stretching assembly 2 includes at least three stepped rollers 21, which are staggered and parallel to each other on both sides of a preset distribution line 22. The number of stepped rollers 21 can be varied and adjusted according to actual needs, and is not limited.

[0043] The multi-stage tensioning mechanism designed in this application has the following beneficial effects:

[0044] 1. By staggering at least three stepped rollers 21 on both sides of a preset distribution line 22, a unique multi-stage stretching structure is constructed. This layout allows the tension on the strip 5 to generate component forces in different directions during the stretching process, achieving different directional force processing to reduce or homogenize the tension of the strip 5. The reduction and homogenization of the strip 5 tension avoids wrinkling problems, ensuring that the strip 5 remains flat during the stretching process. This significantly improves the quality and yield of the electrode sheets by minimizing wrinkling.

[0045] 2. Due to the improved quality of electrode manufacturing, the defect rate during the production process is reduced, eliminating the need for rework or scrapping of a large number of defective products. This saves production time and raw material costs, improves the overall manufacturing quality and production efficiency of the electrodes, and ultimately increases overall production efficiency.

[0046] 3. The design of the calendering component 1 can prevent the material strip 5 from slipping, thereby avoiding the problem of uneven tension caused by slipping.

[0047] The above is Embodiment 1 of a multi-stage tensioning mechanism provided in this application. The following is Embodiment 2 of a multi-stage tensioning mechanism provided in this application. Please refer to the following for details. Figures 1 to 2 .

[0048] Based on the solution of Embodiment 1 above:

[0049] Furthermore, regarding the design of the calendering assembly 1, it is an existing structural design, specifically including the pressure roller 11, the main drive roller 12, and the roller driver (not shown in the figure).

[0050] The pressure roller 11 and the main drive roller 12 are arranged axially parallel; the roller driver is connected to the main drive roller 12 and is used to drive the main drive roller 12 to rotate so that the material belt 5 passes through the space between the pressure roller 11 and the main drive roller 12.

[0051] The straight line where the tangent of the pressure roller 11 contacts the material belt 5 can form a preset distribution line 22.

[0052] In existing technologies, to improve the calendering effect, the calendering assembly 1 is typically made of a hard material. This limits the ability to fine-tune the roller diameter, thus affecting the precise adjustment of the strip 5. This design, combined with the tension lever stretching method, suffers from a high strip breakage rate and a tendency to generate secondary fishtail patterns. To address these issues, this application further incorporates a buffer layer with a certain degree of elastic deformation on the surface of the pressure roller 11. This buffer layer design can buffer the stress generated during stretching and allow for adjustments to the roller diameter of the pressure roller 11 to achieve fine-tuning of the strip 5, thereby reducing fishtail patterns. The buffer layer 111 can be a rubber material layer, and its specific application is not limited.

[0053] Furthermore, it also includes a tension component 3; the tension component 3 is disposed between the calendering component 1 and the stretching component 2, and is used to adjust the tension of the strip. The tension component 3 allows the strip 5 to obtain appropriate tension, thereby further ensuring the stretching effect.

[0054] Furthermore, regarding the design of the tension assembly 3, it is an existing design structure, specifically including a tension roller 31 and a tension driver 32; the tension driver 32 is connected to the tension roller 31 and is used to drive the tension roller 31 to oscillate.

[0055] The oscillation of the tension roller 31 can adjust the tension of the strip 5, ensuring that the strip 5 maintains a stable tension state during the stretching process. By precisely controlling the oscillation angle and speed of the tension roller 31, fine adjustment of the tension of the strip 5 can be achieved, thereby meeting different process requirements and ensuring the consistency and stability of the stretching effect.

[0056] The tension driver 32 can be a design of motor + rocker arm. The motor drives the rocker arm to swing, which in turn drives the tension roller 31 to swing and adjust, so as to achieve precise control of the tension of the material belt 5.

[0057] Furthermore, the tension component 3 is positioned below the calendering component 1 and the stretching component 2.

[0058] Placing the tension assembly 3 below the pressing assembly and the stretching assembly 2 has the following advantages: First, its lower position better balances the forces generated by the calendering assembly 1 and the stretching assembly 2, resulting in more even stress distribution throughout the system. This prevents excessive localized stress from causing component wear or damage, extending the overall lifespan of the equipment. Second, the lower area is relatively unused space; placing the tension assembly 3 here effectively utilizes the space, avoiding overcrowding and making the overall structure more compact and rational, facilitating installation, commissioning, and maintenance. Third, this layout minimizes interference between operators when operating or maintaining the calendering assembly 1, the stretching assembly 2, and the tension assembly 3, improving operational convenience and safety, and ultimately increasing work efficiency.

[0059] Furthermore, it also includes a mechanism carrier 4; the calendering assembly 1, the stretching assembly 2, and the tension assembly 3 are mounted on the mechanism carrier 4.

[0060] The design of the mechanism carrier 4 makes the entire multi-stage tensioning mechanism a single unit, facilitating movement, transportation, and installation. The mechanism carrier 4 can be made of robust and durable materials to ensure its load-bearing capacity and stability. Simultaneously, the bottom of the mechanism carrier 4 is equipped with leveling feet 41, which can adjust the levelness of the mechanism carrier 4 to ensure that each component is in the correct position after installation, further improving the tensioning effect and the stability of the equipment.

[0061] This application also discloses a rolling system, including a rolling mill 6 and a multi-stage stretching mechanism.

[0062] The input side of the roller press 6 is equipped with a multi-stage stretching mechanism, and / or the output side of the roller press 6 is equipped with a multi-stage stretching mechanism.

[0063] Furthermore, the input side and the output side of the roller press 6 are respectively equipped with multi-stage stretching mechanisms; the two multi-stage stretching mechanisms are set in a mirror image relative to the roller press 6.

[0064] Multi-stage tensioning mechanisms are configured on both the input and output sides of the roller press 6, and the two are arranged in a mirror image. This symmetrical layout ensures that the two ends of the conveyor belt 5 are subjected to uniform tension when passing through the roller press 6. Because the symmetrical structure ensures the consistency of the forces on both sides, the force on all parts of the conveyor belt 5 is uniform, avoiding uneven movement caused by excessive or insufficient force on one side, and effectively improving the stability of the conveyor belt 5 during the conveying process.

[0065] Because the multi-stage stretching mechanism achieves uniform force driving of the strip 5, the force of each part of the strip 5 is balanced, and there will be no local force concentration. This allows the strip 5 to pass smoothly through the roller press 6, greatly reducing the occurrence of wrinkling problems, improving product quality, reducing material waste and defect rate caused by wrinkling, and further improving production efficiency and economic benefits.

[0066] The above provides a detailed description of a multi-stage stretching mechanism and roller pressing system provided in this application. For those skilled in the art, based on the ideas of the embodiments of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A multi-stage stretching mechanism characterized by, It includes a calendering assembly (1) and a stretching assembly (2); The calendering assembly (1) and the stretching assembly (2) are distributed sequentially; The stretching assembly (2) includes at least three stepped rollers (21); Each of the stepped rollers (21) is staggered on both sides of the preset distribution line (22) and is parallel to each other.

2. The multi-stage tensioning mechanism according to claim 1, characterized in that, The calendering assembly (1) includes a pressure roller (11), a main drive roller (12), and a roller driver; The pressure roller (11) is arranged axially parallel to the main drive roller (12); The roller driver is connected to the main drive roller (12) and is used to drive the main drive roller (12) to rotate so as to drive the material belt (5) to pass between the pressure roller (11) and the main drive roller (12); The tangent line at the position where the pressure roller (11) contacts the material belt (5) forms the preset distribution line (22).

3. The multi-stage stretching mechanism according to claim 2, wherein The surface of the pressure roller (11) is covered with a buffer layer.

4. The multi-stage stretching mechanism according to claim 1, wherein It also includes a tension component (3); The tension component (3) is disposed between the calendering component (1) and the stretching component (2) for adjusting the tension of the strip.

5. The multi-stage stretching mechanism according to claim 4, wherein The tension assembly (3) includes a tension roller (31) and a tension driver (32); The tension driver (32) is connected to the tension roller (31) and is used to drive the tension roller (31) to swing.

6. The multi-stage stretching mechanism of claim 4, wherein, The tension component (3) is located below the calendering component (1) and the stretching component (2).

7. The multi-stage stretching mechanism of claim 4, wherein It also includes the institutional carrier (4); The calendering assembly (1), the stretching assembly (2), and the tension assembly (3) are mounted on the mechanism carrier (4).

8. The multi-stage stretching mechanism according to claim 7, wherein The bottom of the mechanism carrier (4) is provided with a leveling cup (41).

9. A system for roll pressing, characterized by Includes a roller press (6) and a multi-stage stretching mechanism as described in any one of claims 1 to 7; The multi-stage stretching mechanism is configured on the input side of the roller press (6), and / or the multi-stage stretching mechanism is configured on the output side of the roller press (6).

10. The roll press system of claim 9, wherein, The multi-stage stretching mechanism is respectively configured on the input side and the output side of the roller press (6); The two multi-stage stretching mechanisms are mirror-mounted relative to the roller press (6).

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