Dry-method electrode preparation device
By adjusting the central axis setting of the calendering rolls in the dry electrode preparation device, the pressure between adjacent calendering rolls is reduced, the problem of large flexural deformation is solved, the finished product quality of films and electrodes is improved, and more efficient production is achieved.
Patent Information
- Application Number
- CN202423252926.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In existing dry electrode preparation equipment, the rollers have a large amount of flexible deformation, which leads to equipment wear and poor quality of finished electrodes.
Design a dry electrode preparation apparatus in which the central axes of any three adjacent calendering rolls are set to be located in the same plane, and the central axis of the middle calendering roll is located on one side of the plane. The pressure between adjacent calendering rolls is reduced by the supporting effect, thereby reducing the amount of flexural deformation.
It effectively reduces the amount of flexural deformation of the calendering roll, improves the forming quality of the film and the finished quality of the electrode, and enhances production efficiency and automation level.
Smart Images
Figure CN223858137U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of battery manufacturing, especially relates to a dry method electrode preparation device. BACKGROUND
[0002] The dry method electrode film preparation process includes powder spraying method and binder fiberization method, the powder spraying method is prone to component segregation and uneven phenomenon, and the mainstream currently uses the binder fiberization method. The binder fiberization method is that active material and conductive agent powder are added into solid binder, then high shear force is applied to make the binder fiberized to bond the powder, then the binder is compacted and thinned by extrusion to form a self-supporting film, and the self-supporting film is rolled with the current collector to form an electrode. The electrode film production equipment using the binder fiberization method has the following problems: the dry coating equipment in the industry is arranged in a straight line, so that the pressure on each roller is large whether the rollers are arranged horizontally or vertically, and the flexible deformation of each roller is large.
[0003] Therefore, there is an urgent need for a dry method electrode preparation device to solve the above technical problems. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a dry method electrode preparation device, which can reduce the pressure on each roller and the flexible deformation of each roller.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] A dry method electrode preparation device is provided, which at least includes a calender assembly, the calender assembly includes a plurality of calender rollers for calendering a film, in any three adjacent calender rollers, the center axes of the two calender rollers at the edges are located on the same plane, the center axis of the calender roller in the middle is located on one side of the plane, there is a gap between the two adjacent calender rollers, and the two adjacent calender rollers respectively abut against the film when passing through the film.
[0007] The utility model has at least the following beneficial effects:
[0008] The dry-process electrode preparation device provided by the utility model, the dry-process electrode preparation device at least includes a plurality of calendering rollers for calendering diaphragms, among any three adjacent calendering rollers, the central axes of two calendering rollers located at edges are located on the same plane, the central axis of the calendering roller located in the middle is located on one side of the plane, namely, the central axes of the calendering rollers are not completely arranged on the same plane, so that the calendering roller located below can support the calendering roller located above, thereby reducing the pressure applied by the adjacent calendering rollers to each other, and further reducing the flexible deformation amount of part of the calendering rollers, so that the forming quality of the diaphragm can be improved as a whole, and further the quality of the electrode prepared by the diaphragm can be improved. BRIEF DESCRIPTION OF DRAWINGS
[0009] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the utility model and the drawings.
[0010] Figure 1 The first structure schematic diagram of the dry-process electrode preparation device provided by the embodiments of the utility model is shown in the figure.
[0011] Figure 2 The second structure schematic diagram of the dry-process electrode preparation device provided by the embodiments of the utility model is shown in the figure.
[0012] Figure 3 The third structure schematic diagram of the dry-process electrode preparation device provided by the embodiments of the utility model is shown in the figure.
[0013] Figure 4 The fourth structure schematic diagram of the dry-process electrode preparation device provided by the embodiments of the utility model is shown in the figure.
[0014] In the figure:
[0015] 1, calendering roller; 2, film forming roller; 3, supporting roller; 4, composite roller; 100, current collector. DETAILED DESCRIPTION
[0016] The utility model will be further described in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all structures.
[0017] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's mutual action relation.For the ordinary skill in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.
[0018] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them.Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0019] In the description of the embodiment, the terms "up", "down", "right", etc.orientations or position relations are based on the orientations or position relations shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.
[0020] The embodiment of the utility model provides a kind of dry electrode preparation device to the problem of flexible deformation of roller caused by extrusion between adjacent rollers, which can adaptively change the flexible deformation amount of roller, and provide the finished product quality of electrode.
[0021] Figure 1 The first structure schematic view of the dry electrode preparation device provided by the embodiment of the utility model is shown in the figure; Figure 2 The second structure schematic view of the dry electrode preparation device provided by the embodiment of the utility model is shown in the figure; Figure 3 The third structure schematic view of the dry electrode preparation device provided by the embodiment of the utility model is shown in the figure; Figure 4 The fourth structure schematic view of the dry electrode preparation device provided by the embodiment of the utility model is shown in the figure.
[0022] As Figures 1 to 4The utility model provides a kind of dry method electrode preparation device at least including calendering subassembly, calendering subassembly includes multiple for calendering diaphragm calendering roller 1, in any adjacent three calendering roller 1, the center axis of two calendering roller 1 located at edge is located in the same plane, the center axis of calendering roller 1 located in middle is located in the side of the plane.
[0023] Since the center axis of two calendering roller 1 located at edge is located in the same plane in adjacent three calendering roller 1, the center axis of calendering roller 1 located in middle is located in the side of the plane, that is, the center axis of each calendering roller 1 is not completely coplanar, so that the lower calendering roller 1 can support the upper calendering roller 1, thereby reducing the pressure applied by adjacent calendering roller 1 to each other, and further reducing the flexible deformation of part of the calendering roller 1. The setting can improve the forming quality of the diaphragm as a whole, and further improve the quality of the electrode prepared by the diaphragm.
[0024] When the calendering roller 1 is arranged horizontally, the calendering roller 1 with high center axis is supported by the calendering roller 1 with low center axis, so that the flexible deformation of the calendering roller 1 with high center axis is reduced. When the calendering roller 1 is arranged vertically, the force applied between adjacent calendering roller 1 is correspondingly reduced. From bottom to top, the flexible deformation of the calendering roller 1 is reduced.
[0025] In some embodiments, the speed of the calendering roller 1 gradually increases along the conveying direction of the diaphragm. In the early stage of film rolling, the powder is preliminarily formed into a film with a large thickness and a rough surface, and the opposite force and friction between the adjacent two calendering roller 1 are large. If the speed is too fast, the calendering roller 1 is more likely to deform, and the surface is more likely to be damaged. In the later stage, the film is gradually formed and thinned, and the surface is smooth. The force and friction between the adjacent two calendering roller 1 are correspondingly reduced, so the production efficiency can be improved.
[0026] In some embodiments, the gap between adjacent calendering roller 1 decreases along the calendering direction of the diaphragm. In the early stage of film rolling, the powder is preliminarily formed into a film with a large thickness and a rough surface. If the gap is small, the opposite force and friction will be larger, causing the calendering roller 1 to deform more easily. In the later stage, the film is gradually formed and thinned, and the surface is smooth. Gradually reducing the gap is beneficial to ensure the forming quality of the diaphragm.
[0027] For example, the diameters of each calendering roller 1 are the same. In the three adjacent calendering roller 1, the extrusion force on the calendering roller 1 located in the middle is reduced whether it is supported or pressed by the calendering roller 1 located at the edge, and the flexible deformation of part of the calendering roller 1 is correspondingly reduced. Overall, the quality of the electrode product obtained by the dry method electrode preparation device is better.
[0028] In addition, it should be noted that in order to ensure that the deformation of the calendering roller 1 located downstream of the calendering direction of the film is minimized, the calendering roller 1 should be supported by the adjacent calendering roller 1 to improve the film forming quality of the film layer.
[0029] Exemplarily, the calendering rollers 1 are arranged in the horizontal direction. In this way, the flexible deformation of the calendering rollers 1 can be reduced as a whole, and the finished product quality of the film can be improved.
[0030] Of course, in other embodiments, the calendering rollers 1 are arranged in the vertical direction. In this way, the space occupied by the dry electrode preparation device can be reduced, and since the two calendering rollers 1 located at the top are supported, the finished product quality of the film can also be improved when the film is calendered out of the top calendering roller 1.
[0031] In some embodiments, in order to shape the powder into an initial rough film, the dry electrode preparation device further comprises a film forming assembly, and the film forming assembly comprises two film forming rollers 2. The film forming assembly is located in front of the calendering assembly along the calendering direction of the film, i.e., along the conveying direction of the film. In this way, the powder is first shaped into a rough film by the film forming rollers 2, and then the rough film is thinned by the calendering rollers 1 to obtain a finished film product. In this way, the manufacturing efficiency of the film can be improved, and automatic production can be realized.
[0032] In some embodiments, along the calendering direction of the film, the two film forming rollers 2 are arranged side by side or staggered. In this way, the force received by part of the rollers from the adjacent rollers can be reduced, and the flexible deformation of the rollers can be reduced, and the film forming quality can be improved.
[0033] In other embodiments, along the calendering direction of the film, the film forming rollers 2 are arranged side by side or staggered with the adjacent calendering rollers 1. In this way, the force received by part of the rollers from the adjacent rollers can be reduced, and the flexible deformation of the rollers can be reduced, and the film forming quality can be improved.
[0034] Exemplarily, among any three adjacent rollers of the film forming rollers 2 and the calendering rollers 1, the center axes of the two rollers located at the edges are located on the same plane, and the center axis of the roller located in the middle is located on one side of the plane. The number of film forming rollers 2 is generally two, which can realize the formation of a rough film. In addition, in this way, at least one of the film forming rollers 2 or the calendering rollers 1 can be ensured to be in a supported state, the deformation of the rollers can be reduced, and the finished product quality of the film can be improved.
[0035] In addition, exemplarily, the diameter of the film forming roller 2 is smaller than the diameter of the calendering roller 1.
[0036] In order to reduce the flexible deformation of the edge film forming roller 2, the diameter of the film forming roller 2 can be smaller than the diameter of the calendering roller 1. Figures 2 to 3As shown, the dry electrode preparation device further comprises a supporting assembly, the supporting assembly comprises supporting rollers 3 for supporting the film forming rollers 2 at the edges, and the supporting rollers 3 are in contact with the film forming rollers 2 respectively. In this way, the supporting rollers 3 can support the film forming rollers 2 to prevent the film forming rollers 2 at the edges from being deformed, thereby further improving the finished product quality of the film.
[0037] For example, the supporting assembly comprises at least two supporting rollers 3, which can simultaneously provide support for the film forming rollers 2, reduce the deformation of the film forming rollers 2, and improve the film forming quality.
[0038] In some embodiments, the two sides of the current collector 100 need to be compounded with the film, and the film forming assembly is provided in front of each calendering assembly along the moving direction of the film, and the film forming assembly is used to press the powder into a film and gradually thin the film through the calendering assembly.
[0039] As shown in Figure 2 two supporting rollers 3 are arranged in close contact with each other, and the film forming rollers 2 adjacent to the supporting rollers 3 are arranged in close contact with the two supporting rollers 3 respectively.
[0040] As shown in Figure 3 two supporting rollers 3 are arranged in close contact with each other, and the film forming rollers 2 adjacent to the supporting rollers 3 are arranged in close contact with the two supporting rollers 3 respectively.
[0041] As shown in Figure 4 two supporting rollers 3 are arranged in close contact with each other, and the film forming rollers 2 adjacent to the supporting rollers 3 are arranged in close contact with the two supporting rollers 3 respectively.
[0042] In some embodiments, it should be noted that the two sides of the current collector 100 need to be compounded with the film, and the film forming assembly is provided in front of each calendering assembly along the moving direction of the film, and the film forming assembly is used to press the powder into a film and gradually thin the film through the calendering assembly. Figures 1 to 4 In some embodiments, it should be noted that the two sides of the current collector 100 need to be compounded with the film, and the film forming assembly is provided in front of each calendering assembly along the moving direction of the film, and the film forming assembly is used to press the powder into a film and gradually thin the film through the calendering assembly.
[0043] Exemplarily, in the composite roller 4 and the two calender rollers 1 in front of the composite roller 4, the center axes of the two rollers at the edges are located in the same plane, and the center axis of the roller in the middle is located on one side of the plane. In this way, the purpose of staggered arrangement of the composite roller 4 and the calender rollers 1 can be achieved. In addition, when the calender direction of the film sheet is horizontal, the center axis of the calender roller 1 in the middle is higher than the center axis of the composite roller 4 adjacent to the calender roller 1. In this way, the purpose of supporting the calender roller 1 by the composite roller 4 can be achieved, thereby reducing the extrusion force on the calender roller 1, reducing the flexible deformation of the calender roller 1, and improving the forming quality of the film sheet.
[0044] The composite assembly further comprises a guide roller for guiding the current collector 100 with the film sheet on one side.
[0045] Correspondingly, the support assembly is arranged one-to-one with the film forming assembly to achieve the purpose of supporting different film forming assemblies. The number of the support rollers 3 of the support assembly is not completely the same.
[0046] In addition, the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims
1. A dry electrode preparation apparatus, characterized by, At least comprising a calender assembly, the calender assembly comprises a plurality of calender rollers (1) for calendering a film sheet, in any three adjacent calender rollers (1), the center axes of two calender rollers (1) located at the edges are located on the same plane, the center axis of the calender roller (1) located in the middle is located on one side of the plane, there is a gap between two adjacent calender rollers (1), and when the film sheet passes through the gap between two adjacent calender rollers (1), the two adjacent calender rollers (1) respectively abut against the film sheet.
2. The dry electrode preparation apparatus according to claim 1, wherein Along the calendering direction of the film sheet, the rotation speed of the calender rollers (1) has a gradually increasing trend.
3. The dry electrode preparation apparatus of claim 1, wherein, Along the calendering direction of the film sheet, the gap between adjacent calender rollers (1) has a decreasing trend.
4. The dry electrode preparation apparatus according to any one of claims 1 to 3, characterized in that, The calender rollers (1) are arranged in a horizontal direction; or, The calender rollers (1) are arranged in a vertical direction.
5. The dry electrode preparation apparatus according to any one of claims 1 to 3, wherein Further comprising a film forming assembly, the film forming assembly comprises two film forming rollers (2), and along the calendering direction of the film sheet, the film forming assembly is located in front of the calender assembly.
6. The dry electrode preparation apparatus of claim 5, wherein, Along the calendering direction of the film sheet, the two film forming rollers (2) are arranged side by side or staggered.
7. The dry electrode preparation apparatus of claim 6, wherein, Along the calendering direction of the film sheet, the film forming rollers (2) are arranged side by side or staggered with adjacent calender rollers (1).
8. The dry electrode preparation apparatus of claim 5, wherein, Further comprising a support assembly, the support assembly comprises a support roller (3), and the support roller (3) is used to support the film forming roller (2) located at the edge.
9. The dry electrode preparation apparatus of claim 8, wherein, The support assembly comprises at least two support rollers (3), and the at least two support rollers (3) are respectively arranged in close contact with one or two film forming rollers (2).
10. The dry electrode preparation apparatus according to any one of claims 1 to 3, wherein The calender assembly has two, and the two calender assemblies are respectively used to prepare a first film sheet and a second film sheet, and a composite assembly for compositing a composite film sheet and a current collector (100) is arranged between the two calender assemblies, the composite assembly has two composite film forming areas, one of the composite film forming areas is used to composite the first film sheet and one side of the current collector (100), and the other composite film forming area is used to composite the second film sheet and the other side of the current collector (100) to form a pole piece.
11. The dry electrode preparation apparatus of claim 10, wherein, The composite film forming area at least comprises a composite roller (4), and along the calendering direction of the film sheet, the composite roller (4) is located behind adjacent calender rollers (1) and arranged side by side or staggered with the adjacent calender rollers (1).