Wrinkle removing mechanism and compression roller machine
By designing a wrinkle removal mechanism in the roller press, the belt is rolled and trimmed by using the first roller, the second roller and the wrinkle removal roller, the junction of the coating area and the white space area during the roller pressing process is solved. The problem of wrinkles improves the rolling effect and quality of the product.
Patent Information
- Application Number
- CN202420474879.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-11
AI Technical Summary
During the preparation of the battery pole sheet, during the roll press, the current collector in the coating area is pressed and easily extends to the white space, causing wrinkles to occur at the junction between the coating area and the white space area, which in turn leads to The product has poor pressing roller effect and low quality.
A wrinkle removal mechanism is designed, including a first roller, a second roller and a wrinkle removal roller, through which the tape is guided to the roll pressure range of the wrinkle removal roller and through wrinkle removal The roller rolls the blank area on the strip to trim the edges of the coating area to improve wrinkle removal effect.
Through the use of wrinkle removal mechanism, the ductility of the white space area is effectively improved, the wrinkles at the junction of the coating area and the white space area are reduced, and the rolling effect and quality of the product are improved.
Smart Images
Figure CN222462926U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of battery manufacturing, and in particular to a wrinkle removal mechanism and a roller pressing machine. Background Art
[0002] In the preparation process of battery pole pieces, rolling is an indispensable step, which can combine the active material and the current collector more closely, increase the compaction density of the pole piece, and improve the performance of the battery cell end.
[0003] At present, most of the battery cells have edge tabs, resulting in a coating area in the middle of the current collector and a blank area on the edge. When rolling, the roller contacts the coating area, which not only compresses the thickness direction of the electrode sheet, but also generates shear force along the direction of strip movement, causing the coating area to stretch along the direction of strip movement.
[0004] The blank area does not touch the roller during rolling, resulting in the blank area not being extended. This makes it very easy to produce wrinkles at the junction of the coating area and the blank area, causing great trouble to the subsequent battery cell production, especially when the high compaction and thin strip are particularly obvious. This makes it difficult to introduce the thinner current collector. Utility Model Content
[0005] The main purpose of the present application is to provide a wrinkle removal mechanism and a roller pressing machine to solve the problem in the related art that during the roller pressing process, the collector in the coating area is pressed and easily extends to the blank area, causing wrinkles at the junction of the re-coating area and the blank area, which in turn leads to poor product rolling effect and low quality.
[0006] According to one aspect of the present application, a wrinkle removal mechanism is provided, comprising a first roller, a second roller, and a wrinkle removal roller arranged between the first roller and the second roller; the first roller and the second roller guide the strip on the roller press to the roller range of the wrinkle removal roller, and the strip runs between the first roller and the second roller at a preset tension; the wrinkle removal roller corresponds to the blank area on the strip, and when the wrinkle removal roller rolls, the blank area on the strip is rolled and the edge of the coating area on the strip where the collector has been laid is trimmed.
[0007] As an optional embodiment, it also includes a third roller; the first roller adjusts the direction of the horizontal strip and guides it to the wrinkle removal roller; the second roller adjusts the direction of the strip after being pressed by the wrinkle removal roller to the third roller; the third roller adjusts the direction of the strip to its original horizontal position.
[0008] As an optional embodiment, the blank area corresponds to at least one wrinkle removal roller. When one blank area corresponds to multiple wrinkle removal rollers, the multiple wrinkle removal rollers are arranged in sequence according to the moving direction of the strip.
[0009] As an optional embodiment, when one blank area corresponds to one wrinkle removal roller and there are multiple blank areas on the strip, the same number of wrinkle removal rollers are provided; the multiple wrinkle removal rollers correspond one-to-one to the multiple blank areas.
[0010] As an optional embodiment, the multiple wrinkle-removing rollers have the same size and are coaxially arranged.
[0011] As an optional embodiment, the wrinkle removal mechanism is respectively arranged on the strip before or after the main pressing roller, wherein the main pressing roller is a pressing roller on the pressing roller machine that presses the strip on which the current collector is laid.
[0012] As an optional embodiment, there are multiple wrinkle removal mechanisms, and the multiple wrinkle removal mechanisms are respectively arranged on the strip before and after the main pressure roller.
[0013] As an optional embodiment, the first roller and the second roller of different wrinkle removal mechanisms are located at the same or different positions on the strip, wherein the positions include above the strip and below the strip.
[0014] As an optional embodiment, the wrinkle-removing roller is a heatable roller.
[0015] On the other hand, the present application also provides a roller pressing machine, comprising a main roller, a first guide roller arranged in front of the main roller, a second guide roller arranged behind the main roller, and a wrinkle removal mechanism as described in any one of the above items, wherein the main roller is used by the roller pressing machine to roll the strip for laying the collector.
[0016] As an optional embodiment, the wrinkle removal mechanism is provided between the main pressure roller and the first guide roller, and between the main pressure roller and the second guide roller.
[0017] In the present application, the direction of the strip on the roller press is adjusted and stretched to a preset tension by the first roller and the second roller, and the blank area on the strip is rolled by the wrinkle removal roller corresponding to the blank area, so that the blank area has better ductility and the wrinkle removal effect is improved, and the edge of the coating area on the strip where the collector has been laid is trimmed to effectively remove wrinkles from the blank area.
[0018] This solves the problem in the related art that during the rolling process of the rolling machine, the current collector in the coating area is under pressure and easily extends to the blank area, causing wrinkles at the junction of the re-coating area and the blank area, which in turn leads to poor rolling effect and low quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0020] Figure 1 This is a schematic diagram of the wrinkle removal mechanism disclosed in this application.
[0021] Figure 2 This is a schematic diagram of the cooperation between the wrinkle removal roller and the belt disclosed in this application.
[0022] Figure 3 It is a schematic diagram of the roller press disclosed in this application.
[0023] The above drawings include the following reference numerals:
[0024] 1. Wrinkle removal mechanism; 11. First roller; 12. Second roller; 13. Wrinkle removal roller; 14. Third roller; 2. Strip material; 3. Main pressure roller; 4. First guide roller; 5. Second guide roller. DETAILED DESCRIPTION
[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0028] See also Figures 1 to 3 As shown, the present application provides a wrinkle removal mechanism, including a first roller 11, a second roller 12, and a wrinkle removal roller 13 disposed between the first roller 11 and the second roller 12. The first roller 11 and the second roller 12 support or press the strip 2 of the roller press machine upward, so that the strip 2 is tightened and its tension reaches a preset tension, so as to cooperate with the wrinkle removal roller 13 for rolling. The wrinkle removal roller 13 can generate effective pressure on the strip 2 during rolling.
[0029] The first roller 11 and the second roller 12 guide the strip 2 on the roller press to the pressing range of the wrinkle removal roller 13. The pressing range here, on the one hand, means that the strip 2 needs to contact the wrinkle removal roller 13 with a preset tension, and the distance between the rotating axis of the wrinkle removal roller 13 and the strip 2 is less than or equal to the radius of the wrinkle removal roller 13, so that the strip 2 and the wrinkle removal roller 13 can form effective contact, so that the wrinkle removal roller 13 rolls the blank area on the strip 2 by sliding or rolling during the movement of the strip 2.
[0030] The strip 2 runs between the first roller 11 and the second roller 12 at a preset tension, so that the wrinkle removal roller 13 and the strip 2 can form an effective rolling pressure. The greater the tension, the better the rolling effect. However, excessive tension may also damage the strip. Therefore, in this embodiment, only the minimum tension is limited, and reaching the minimum tension can ensure the rolling effect. Specifically, the minimum tension is related to the different materials of the strip. The better the elasticity of the material, the greater the minimum tension required. For example, the original film of the strip is PP polypropylene film, and its minimum tension can be 1-5N / mm, preferably 2N / mm, 3N / mm and 4N / mm. Make the strip 2 flat and can effectively form a rolling pressure with the wrinkle removal roller 13.
[0031] When the wrinkle removal roller 13 rolls, it rolls the strip 2 along the moving direction of the strip 2, and the structure of the strip 2 itself is divided into zones along the moving direction, usually including a coating zone in the middle of the strip and blank zones on both sides. The wrinkle removal roller 13 corresponds to the blank zones on the strip 2, that is, when the wrinkle removal roller 13 rolls, it rolls the blank zones on the strip 2 and trims the edges of the coating zones on the strip 2 where the current collector has been laid.
[0032] The blank area on the current collector is formed by plating or otherwise coating the original film (for example, PP polypropylene film or PET polyethylene terephthalate film), and finally coating or otherwise forming the active material in the middle of the coating. The coating area where the active material is formed is the coating area, which is used to coat the active material, and the areas on both sides of the coating where no active material is formed are the blank areas.
[0033] like Figure 2As shown, there is a height difference between the coating area A and the blank area B. When the wrinkle removal roller 13 rolls the blank area B, the active material at the edge where the coating area A and the blank area B are in contact can be trimmed. This makes the force on the blank area B more uniform during the rolling process. Combined with the rolling of the blank area B, the wrinkles of the blank area B can be effectively eliminated.
[0034] In this embodiment, the direction of the strip 2 on the roller press is adjusted and stretched to a preset tension by the first roller 11 and the second roller 12, and the blank area on the strip 2 is rolled corresponding to the blank area by the wrinkle removal roller 13, so that the blank area has better ductility and the wrinkle removal effect is improved, and the edge of the coating area on the strip 2 where the collector has been laid is trimmed to effectively remove wrinkles from the blank area.
[0035] This solves the problem in the related art that during the rolling process of the rolling machine, the current collector in the coating area is under pressure and easily extends to the blank area, causing wrinkles at the junction of the re-coating area and the blank area, which in turn leads to poor rolling effect and low quality of the product.
[0036] As an optional embodiment, it also includes a third roller 14; the first roller 11 adjusts the direction of the horizontal strip 2 and guides it to the wrinkle removal roller 13; the second roller 12 adjusts the direction of the strip 2 after being pressed by the wrinkle removal roller 13 to the third roller; the third roller 14 adjusts the direction of the strip 2 to its original horizontal position.
[0037] In the roller press, the strip 2 will enter the main roller 3 in a set manner, with its original running track. The first roller 11 and the second roller 12 will lift or press the strip 2 up and down, changing the original running track. Before the strip 2 enters the wrinkle removal mechanism, the track of the strip 2 can be changed according to demand. After exiting the wrinkle removal mechanism, it needs to enter the main roller 3. If the position of the main roller 3 does not change, the running track of the strip 2 needs to be restored to the original running track with the help of the third roller 14. This ensures that the strip can effectively complete subsequent work in the roller press.
[0038] As an optional embodiment, the blank area corresponds to at least one de-wrinkling roller 13 . When one blank area corresponds to multiple de-wrinkling rollers 13 , the multiple de-wrinkling rollers 13 are arranged in sequence according to the moving direction of the strip 2 .
[0039] In some cases, the strip 2 may have more than one blank area, and each blank area corresponds to at least one wrinkle removal roller 13. In some cases, a blank area may also be provided with multiple wrinkle removal rollers 13, and the multiple wrinkle removal rollers 13 are arranged successively along the movement direction of the strip 2, so as to roll the blank area multiple times.
[0040] As an optional embodiment, when one blank area corresponds to one wrinkle removal roller 13 and there are multiple blank areas on the strip 2, the same number of wrinkle removal rollers 13 are provided; the multiple wrinkle removal rollers 13 correspond one-to-one to the multiple blank areas.
[0041] When a wrinkle removal roller 13 is provided in each blank area, if there are multiple blank areas in the strip 2, it is equivalent to providing a wrinkle removal roller 13 in each blank area, that is, multiple wrinkle removal rollers 13 correspond to multiple blank areas one by one.
[0042] As an optional embodiment, the multiple wrinkle-removing rollers 13 have the same size and are coaxially arranged.
[0043] A wrinkle removal roller 13 is provided in each blank area, and in the case where there are multiple blank areas in the strip 2, multiple wrinkle removal rollers can be coaxially arranged for easy installation and maintenance, and the multiple wrinkle removal rollers 13 have the same size for easy manufacturing, installation and maintenance.
[0044] As an optional embodiment, the wrinkle removal mechanism 1 is respectively arranged on the strip 2 before or after the main pressing roller 3, wherein the main pressing roller 3 is a pressing roller on a pressing roller machine for pressing the strip 2 on which the current collector is laid.
[0045] The wrinkle removal mechanism 1 is arranged before the main pressing roller 3, and can pre-stretch the blank area. The wrinkle removal mechanism 1 is arranged after the main pressing roller 3, and can post-stretch the blank area after the roller coating area. The effects are similar, and they can be used separately or together.
[0046] As an optional embodiment, there are multiple wrinkle removal mechanisms 1, and the multiple wrinkle removal mechanisms 1 are respectively arranged on the strip 2 before and after the main pressure roller 3.
[0047] That is, when there are multiple wrinkle removal mechanisms 1, at least one wrinkle removal mechanism 1 is arranged before the main pressing roller 3, and at least one wrinkle removal mechanism 1 is arranged after the main pressing roller 3, so that the main pressing roller 3 is distributed before and after, realizing pre-stretching and post-stretching of the blank area, and improving the wrinkle removal effect of the blank area.
[0048] As an optional embodiment, the first roller 11 and the second roller 12 of different wrinkle removal mechanisms 1 are located at the same or different positions on the strip 2 , wherein the positions include above the strip 2 and below the strip 2 .
[0049] The first roller 11 and the second roller 12 are above the strip 2, that is, they press down the strip 2, so that the strip reaches a preset tension, and the first roller 11 and the second roller 12 are below the strip 2, that is, they support the strip 2, so that the strip reaches a preset tension. Then, the wrinkle removal operation is realized in cooperation with the wrinkle removal roller.
[0050] As an optional embodiment, the wrinkle-removing roller 13 is a heatable roller.
[0051] The heatable roller can heat and soften the strip 2 to improve the wrinkle removal effect when rolling the blank area and trimming the coating area.
[0052] On the other hand, an embodiment of the present application also provides a roller pressing machine, comprising a main roller 3, a first guide roller 4 arranged in front of the main roller 3, a second guide roller 5 arranged behind the main roller 3, and the above-mentioned wrinkle removal mechanism 1, wherein the main roller 3 is used for the roller pressing machine to roll the strip 2 for laying the collector.
[0053] The roller press includes the above-mentioned wrinkle removal mechanism 1, and therefore, the roller press includes all the technical effects of the above-mentioned wrinkle removal mechanism 1. Since the technical effects of the electrode assembly have been described in detail above, they will not be repeated here.
[0054] As an optional embodiment, a wrinkle removal mechanism 1 is provided between the main pressure roller 3 and the first guide roller 4 , and between the main pressure roller 3 and the second guide roller 5 .
[0055] It should be noted that this embodiment also provides an optional implementation, which is described in detail below.
[0056] A roller press with wrinkle removal function includes an unwinding roller, which is equivalent to the first guide roller, a front wrinkle removal mechanism, a pair of main pressing rollers, a rear wrinkle removal mechanism, and a winding roller, which is equivalent to the second guide roller. The above-mentioned pole piece is also a battery pole piece, which is an optional way of the above-mentioned strip 2.
[0057] The wrinkle removal mechanism includes two rollers for adjusting the direction of the strip, namely the first roller and the second roller; the strip between the two rollers has a certain tension. The wrinkle removal mechanism also includes a wrinkle removal roller, which can move in the md direction perpendicular to the strip as a whole. The md direction MD is the longitudinal direction. MD is the abbreviation of Machine Direction, which means the mechanical direction, that is, the longitudinal direction. In the manufacturing industry, the MD direction refers to the processing or assembly operations performed along the movement direction of the machine or equipment.
[0058] The number of wrinkle removal rollers is at least 1, and the wrinkle removal roller rotates around the wrinkle removal roller shaft. It should be noted that the multiple wrinkle removal rollers here can be coaxially arranged and rotated. The wrinkle removal roller can also move arbitrarily along the TD direction of the strip on the wrinkle removal roller shaft. TD is the abbreviation of Transverse Direction, which means perpendicular to the machine direction, that is, the transverse direction.
[0059] The wrinkle removal roller may also have a heating function.
[0060] In actual operation, the number of wrinkle removal rollers is set according to the number of blank areas. In this embodiment, there are two blank areas, and two wrinkle removal rollers are set accordingly. Preferably, they can be coaxially arranged.
[0061] Specifically, first adjust the wrinkle removal roller downward to a position away from the pole piece. Use the first and second rollers to establish tension, then extend the two wrinkle removal rollers and adjust the wrinkle removal roller axis horizontally, with the vertical edge corresponding to the roots of the two blank areas, and then adjust the wrinkle removal roller to move upward so that the wrinkle removal roller supports the roots of the blank areas, and adjust the height of the wrinkle removal roller according to the size of the blank area that needs to be extended. If the blank area needs to be extended more, the height is high, and if the blank area needs to be extended less, the height is low.
[0062] The wrinkle removal device near the unwinding roller is a front stretching device, which can pre-stretch the blank area of the pole piece; the wrinkle removal device near the winding roller is a post stretching device; the two have similar effects, but one is before the roller wrinkles are generated and the other is after the wrinkles are generated. They can be used separately or together.
[0063] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0064] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.
[0065] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A wrinkle removal mechanism, characterized in that: It comprises a first roller (11), a second roller (12), and a wrinkle removal roller (13) arranged between the first roller (11) and the second roller (12); The first roller (11) and the second roller (12) guide the strip (2) on the roller press to the roller range of the wrinkle removal roller (13), and the strip (2) runs between the first roller (11) and the second roller (12) at a preset tension; The wrinkle removal roller (13) corresponds to the blank area on the strip (2). When the wrinkle removal roller (13) is rolled, the blank area on the strip (2) is rolled and the edge of the coating area on which the collector has been laid on the strip (2) is trimmed.
2. The wrinkle removal mechanism according to claim 1, characterized in that: Also included is a third roller (14); The first roller (11) adjusts the direction of the horizontal strip (2) and guides it to the wrinkle removal roller (13); the second roller (12) adjusts the direction of the strip (2) after being pressed by the wrinkle removal roller (13) to the third roller; the third roller (14) adjusts the direction of the strip (2) to its original horizontal position.
3. The wrinkle removal mechanism according to claim 1, characterized in that: The blank area corresponds to at least one wrinkle removal roller (13). When one blank area corresponds to multiple wrinkle removal rollers (13), the multiple wrinkle removal rollers (13) are arranged in sequence according to the movement direction of the strip (2).
4. The wrinkle removal mechanism according to claim 3, characterized in that: When one of the blank areas corresponds to one wrinkle removal roller (13), and the number of the blank areas on the strip (2) is plural, the same number of wrinkle removal rollers (13) are provided; The plurality of wrinkle removal rollers (13) correspond one to one to the plurality of blank areas.
5. The wrinkle removal mechanism according to claim 4, characterized in that: The multiple wrinkle removal rollers (13) have the same size and are coaxially arranged.
6. The wrinkle removal mechanism according to claim 1, characterized in that: The wrinkle removal mechanism (1) is respectively arranged on the strip (2) before or after the main pressing roller (3), wherein the main pressing roller (3) is a pressing roller on the pressing roller machine for pressing the strip (2) on which the current collector is laid.
7. The wrinkle removal mechanism according to claim 6, characterized in that: The number of the wrinkle removal mechanisms (1) is multiple, and the multiple wrinkle removal mechanisms (1) are respectively arranged on the strip (2) before and after the main pressure roller (3).
8. The wrinkle removal mechanism according to claim 7, characterized in that: The first roller (11) and the second roller (12) of different wrinkle removal mechanisms (1) are located at the same or different positions on the strip (2), wherein the positions include above the strip (2) and below the strip (2).
9. The wrinkle removal mechanism according to any one of claims 1 to 8, characterized in that: The wrinkle removal roller (13) is a heatable roller.
10. A roller press, characterized in that: It comprises a main pressing roller (3), a first guide roller (4) arranged in front of the main pressing roller (3), a second guide roller (5) arranged behind the main pressing roller (3), and a wrinkle removal mechanism (1) according to any one of claims 1 to 9, wherein the main pressing roller (3) is used by the pressing roller machine to press the strip (2) on which the collector is laid.
11. The roller press according to claim 10, characterized in that: The wrinkle removal mechanism (1) is provided between the main pressure roller (3) and the first guide roller (4), and between the main pressure roller (3) and the second guide roller (5).