Flower roller and winding equipment

Abstract

The utility model provides an embossing roller and winding equipment, the embossing roller comprises a roller shaft and a rotating core shaft, the rotating core shaft is sleeved outside the roller shaft and is rotatably connected with the roller shaft, the rotating core shaft comprises a plurality of rotating outer rollers, the rotating outer rollers are arranged along the circumferential direction of the rotating core shaft, and the rotating outer rollers are arranged along the circumferential direction of the rotating core shaft. And a preset distance is formed between any two adjacent rotating outer rollers. According to the utility model, the situation that the wave part of the composite pole piece is extruded in the conveying process, so that the composite pole piece generates wrinkles or creases at the wave part, and the quality of a battery cell is influenced can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core manufacturing, in particular to a flower roller and a winding device. Background Art

[0002] The existing winding equipment basically uses many rollers to combine the positive electrode sheet, separator, negative electrode sheet and separator, and then winds them into battery cells through winding needles. However, this method has low alignment accuracy of the positive electrode sheet and the negative electrode sheet, which affects the quality of the battery cell.

[0003] In order to improve the alignment accuracy of the positive and negative electrodes and improve the quality of the battery cell, a method has emerged in the market that combines the positive electrode, the separator and the negative electrode into one body, forms a composite electrode and then winds it. This method can improve the alignment accuracy of the positive and negative electrodes to a certain extent, but when the composite electrode is conveyed by the existing roller, the composite electrode is prone to wrinkles or creases during the conveying process, which affects the quality of the battery cell. Utility Model Content

[0004] The utility model aims to solve the problem that wrinkles or folds are easily generated when the existing roller conveys the composite pole piece.

[0005] In order to solve the above problems, the utility model provides a first aspect of a flower roller, comprising:

[0006] Roller;

[0007] A rotating mandrel is sleeved outside the roller shaft and is rotatably connected to the roller shaft. The rotating mandrel includes a rotating outer roller. A plurality of the rotating outer rollers are arranged along the circumferential direction of the rotating mandrel, and along the circumferential direction of the rotating mandrel, any two adjacent rotating outer rollers are spaced a preset distance apart.

[0008] Furthermore, the rotating core shaft also includes a rotating disk, two of which are both sleeved outside the roller shaft, the two rotating disks are relatively arranged along the axial direction of the roller shaft, the rotating outer roller is arranged between the two rotating disks, and multiple rotating outer rollers are arranged along the circumferential direction of the rotating disk.

[0009] Furthermore, the plurality of rotating outer rollers are evenly arranged along the circumferential direction of the rotating disk.

[0010] Furthermore, the angle between any two adjacent rotating outer rollers is 20° to 40°.

[0011] Further, a projection of the rotating outer roller along the axial direction is located inside the rotating disk.

[0012] Furthermore, it also includes a baffle, and the two baffles are respectively connected to the two rotating disks. The rotating disk includes a first side surface and a second side surface that are oppositely arranged in the axial direction. The first side surface is a side of the rotating disk where the rotating outer roller is arranged, and the baffle is arranged on the second side surface.

[0013] Furthermore, a fixing piece is provided on the baffle, a through hole penetrating the first side surface and the second side surface is provided on the rotating disk, a plurality of the through holes are arranged along the circumferential direction of the rotating disk, and the fixing piece is connected to the rotating disk via the through holes.

[0014] Furthermore, it also includes a retaining ring, which is arranged close to at least one of the retaining pieces and is sleeved outside the roller shaft.

[0015] Furthermore, bearings are arranged between the roller shaft and the two rotating disks, a bushing is arranged between the two bearings, and the bushing is connected to the two bearings.

[0016] A second aspect of the utility model provides a winding device, comprising the flower roller as shown in the first aspect.

[0017] The flower roller and winding equipment described in the utility model are achieved by arranging a plurality of rotating outer rollers arranged along the circumferential direction of the rotating core shaft on the rotating core shaft, with a preset distance between any two adjacent rotating outer rollers. When the rotating core shaft rotates relative to the roller shaft, the rotating outer rollers can convey the composite pole piece, and the preset distance between the rotating outer rollers can form an avoidance space, so that the wave part of the composite pole piece can be temporarily placed in the avoidance space during the conveying process. After the composite pole piece passes through the rotating core shaft, the wave part of the composite pole piece can immediately restore its original shape, thereby preventing the wave part of the composite pole piece from being squeezed during the conveying process, causing wrinkles or creases to form on the wave part of the composite pole piece, thereby affecting the quality of the battery cell. In addition, the flower roller of the utility model is used to replace the roller in the prior art. In the process of conveying the composite pole piece, the flower roller can prevent the composite pole piece from producing wrinkles or creases, thereby speeding up the conveying speed of the composite pole piece, and also helping to improve the winding efficiency of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the flower roller provided in the embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the top view of the flower roller provided in an embodiment of the utility model;

[0020] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the BB plane;

[0021] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure along the AA plane. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is described clearly and in detail below in conjunction with the accompanying drawings. In the description of the utility model, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, in the description of the utility model, the meaning of "at least one" is one or more, unless otherwise clearly and specifically defined.

[0023] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the description of this specification, the term "as an optional implementation" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one optional embodiment or optional example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same implementation or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0025] In the prior art, in order to improve the alignment accuracy of the positive electrode sheet and the negative electrode sheet and thus improve the quality of the battery cell, a method has now appeared on the market in which the positive electrode sheet, the separator and the negative electrode sheet are combined into one, and the composite electrode sheet is then wound. However, when winding the battery cell, the electrode sheet on the outer ring is usually longer than the electrode sheet on the inner ring. Therefore, after the positive electrode sheet, the separator and the negative electrode sheet are combined into one, the electrode sheet wound on the outer ring needs to be longer than the electrode sheet wound on the inner ring, which also makes the electrode sheet on the outside of the composite electrode sheet wavy. When the composite electrode sheet is transported by the existing roller, the composite electrode sheet with a wavy outer side is prone to wrinkles or creases during the transportation process, affecting the quality of the battery cell.

[0026] In order to solve the above problems, a pattern roller and a winding device are provided in this embodiment to prevent the composite pole piece with a wavy outer side from having wrinkles or creases during the transmission process, which is beneficial to improving the quality of the battery cell.

[0027] Combination Figures 1 to 4 As shown, the first aspect of this embodiment provides a flower roller, which includes a roller shaft 10 and a rotating core shaft 20. The rotating core shaft 20 is sleeved outside the roller shaft 10, and the roller shaft 10 is fixedly arranged, and the rotating core shaft 20 can rotate relative to the roller shaft 10.

[0028] The rotating mandrel 20 includes a rotating outer roller 21 . The plurality of rotating outer rollers 21 are arranged along the circumferential direction of the rotating mandrel 20 . Along the circumferential direction of the rotating mandrel 20 , any two adjacent rotating outer rollers 21 are spaced apart by a preset distance.

[0029] In the present embodiment, a plurality of rotating outer rollers arranged along the circumferential direction of the rotating core shaft are provided on the rotating core shaft, and a preset distance is provided between any two adjacent rotating outer rollers. When the rotating core shaft rotates relative to the roller shaft, the rotating outer rollers can convey the composite pole piece, and the preset distance between the rotating outer rollers can form an avoidance space, so that the wave part of the composite pole piece can be temporarily placed in the avoidance space during the conveying process. After the composite pole piece passes through the rotating core shaft, the wave part of the composite pole piece can immediately restore its original shape, thereby avoiding the wave part of the composite pole piece from being squeezed during the conveying process, causing wrinkles or creases to form on the wave part of the composite pole piece, thereby affecting the quality of the battery cell. In addition, the flower roller of the present embodiment is used to replace the roller in the prior art. In the process of conveying the composite pole piece, the flower roller can avoid wrinkles or creases on the composite pole piece, thereby speeding up the conveying speed of the composite pole piece, and also helping to improve the winding efficiency of the battery cell.

[0030] In this embodiment, the rotating mandrel 20 further includes two rotating disks 22, which are used to carry the rotating outer rollers 21. The two rotating disks 22 are arranged opposite to each other along the axial direction of the roller shaft 10, and the two rotating disks 22 are both sleeved outside the roller shaft 10, and the rotating outer rollers 21 are both arranged between the two rotating disks 22. Specifically, one end of the rotating outer roller 21 is arranged on one rotating disk 22, and the other end of the rotating outer roller 21 is arranged on the other rotating disk 22; multiple rotating outer rollers 21 are arranged along the circumferential direction of the rotating disk 22. Therefore, when the rotating disk 22 rotates relative to the roller shaft 10, the multiple rotating outer rollers 21 can be driven to rotate relative to the roller shaft 10, thereby conveying the composite pole piece 100.

[0031] As an optional embodiment, a plurality of mounting holes arranged along the circumferential direction are provided on the rotating disk 22 , and the mounting holes are arranged one by one with the rotating outer rollers 21 . The rotating outer rollers 21 can be installed on the rotating disk 22 through the mounting holes.

[0032] In this embodiment, a plurality of rotating outer rollers 21 are evenly arranged along the circumferential direction of the rotating disk 22. Thus, during the transmission of the composite pole piece 100, each position of the composite pole piece 100 can be subjected to a relatively uniform transmission force, thereby avoiding wrinkles caused by uneven force on the composite pole piece 100, which affects the performance of the composite pole piece 100.

[0033] Combination Figure 4 As shown, as an optional embodiment, the angle between any two adjacent rotating outer rollers 21 is 20° to 40°, that is, Figure 4 In the figure, a is 20° to 40°. Thus, by limiting the angle between any two adjacent rotating outer rollers 21, the preset distance between the two adjacent rotating outer rollers 21 can be limited, thereby preventing the preset distance between the two adjacent rotating outer rollers 21 from being too large, causing creases to appear on the composite pole piece 100 when passing through the rotating outer roller 21, and preventing the preset distance between the two adjacent rotating outer rollers 21 from being too small, causing the waves of the composite pole piece to be squeezed during the transmission process.

[0034] Combination Figure 4 As shown, the projection of the rotating outer roller 21 in the axial direction is located inside the rotating disk 22, so that the edge of the rotating outer roller 21 does not exceed the rotating disk 22. Therefore, on the one hand, the rotating outer roller 21 is more firmly installed on the rotating disk 22, and on the other hand, it is beneficial to reduce the spatial volume of the pattern roller.

[0035] Combination Figure 3As shown, the flower roller also includes two baffles 30, which are respectively connected to the rotating disk 22. The rotating disk 22 includes a first side surface and a second side surface that are arranged oppositely in the axial direction, wherein the first side surface is a side of the rotating disk 22 on which the rotating outer roller 21 is installed, that is, the first side surface is a side on which the two rotating disks 22 are arranged oppositely, and the two baffles 30 are both arranged on the second side surface. Therefore, by arranging the baffle 30 on the second side surface of the rotating disk 22, the rotating outer roller 21 can be better arranged on the rotating disk 22, thereby improving the overall stability of the rotating mandrel 20.

[0036] As an optional embodiment, a fixing piece may be provided on the baffle 30, and a through hole 221 penetrating the first side surface and the second side surface is provided on the rotating disk 22, and a plurality of through holes 221 are arranged along the circumferential direction of the rotating disk 22, and the fixing piece is connected to the rotating disk 22 through the through hole 221 to achieve a fixed connection between the baffle 30 and the rotating disk 22. In this embodiment, the fixing piece may be a bolt or a screw, and the fixing piece is detachably connected to the baffle 30.

[0037] Combination Figures 1 to 3 As shown, the pattern roller further includes a retaining ring 40, which is arranged near at least one retaining piece 30 and sleeved outside the roller shaft 10. As an optional embodiment, the retaining ring 40 is arranged near one retaining piece 30, and the retaining ring 30 can abut against one end of the retaining piece 30 away from the rotating disk 22, and the retaining ring 30 can also be spaced apart from the retaining piece 30 by a preset distance. Thus, the rotating direction of the rotating mandrel 20 is limited by the retaining ring 40, preventing the rotating mandrel 20 from moving along the axial direction of the roller shaft 10 during the rotation process.

[0038] Combination Figure 3 As shown, a bearing 50 is provided between the roller shaft 10 and the two rotating disks 22, and the rotating disk 22 can be installed on the roller shaft 10 through the bearing 50, so that the rotating mandrel 20 is sleeved on the roller shaft 10 and the rotating mandrel 20 can rotate relative to the roller shaft 10, and a bushing 60 is provided between the two bearings 50, and the bushing 60 is connected to the two bearings 50. Therefore, by providing the bushing 60 between the two bearings 50, the rotating mandrel 20 can rotate more smoothly relative to the roller shaft 10, and the composite pole piece 100 can be transmitted on the rotating mandrel 20 more smoothly.

[0039] The second aspect of this embodiment further provides a winding device, which includes the flower roller shown in the first aspect. In the process of conveying the composite pole piece, the flower roller can prevent the wave part of the composite pole piece from being squeezed during the conveying process, so that the composite pole piece will have wrinkles or creases at the wave part, affecting the quality of the battery cell; in addition, in the process of conveying the composite pole piece, the flower roller can prevent the composite pole piece from having wrinkles or creases, thereby speeding up the conveying speed of the composite pole piece and also facilitating the winding efficiency of the battery cell.

[0040] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A flower roller, characterized in that: include: Roller; A rotating mandrel is sleeved outside the roller shaft and is rotatably connected to the roller shaft. The rotating mandrel includes a rotating outer roller. A plurality of the rotating outer rollers are arranged along the circumferential direction of the rotating mandrel, and along the circumferential direction of the rotating mandrel, any two adjacent rotating outer rollers are spaced a preset distance apart.

2. The pattern roller according to claim 1, characterized in that: The rotating core shaft also includes a rotating disk, two of which are both sleeved outside the roller shaft, the two rotating disks are arranged opposite to each other along the axial direction of the roller shaft, the rotating outer roller is arranged between the two rotating disks, and a plurality of rotating outer rollers are arranged along the circumferential direction of the rotating disk.

3. The pattern roller according to claim 2, characterized in that: The plurality of rotating outer rollers are evenly arranged along the circumferential direction of the rotating disk.

4. The pattern roller according to claim 2, characterized in that: The angle between any two adjacent rotating outer rollers is 20° to 40°.

5. The pattern roller according to claim 2, characterized in that: The projection of the rotating outer roller in the axial direction is located inside the rotating disk.

6. The pattern roller according to claim 2, characterized in that: It also includes a baffle, and the two baffles are respectively connected to the two rotating disks. The rotating disk includes a first side surface and a second side surface that are arranged opposite to each other in the axial direction. The first side surface is a side of the rotating disk where the rotating outer roller is arranged, and the baffle is arranged on the second side surface.

7. The pattern roller according to claim 6, characterized in that: The baffle is provided with a fixing piece, the rotating disk is provided with a through hole penetrating the first side surface and the second side surface, a plurality of the through holes are arranged along the circumferential direction of the rotating disk, and the fixing piece is connected to the rotating disk through the through holes.

8. The pattern roller according to claim 6, characterized in that: It also includes a retaining ring, which is arranged close to at least one of the retaining sheets and is sleeved outside the roller shaft.

9. The pattern roller according to claim 2, characterized in that: Bearings are arranged between the roller shaft and the two rotating disks, a bushing is arranged between the two bearings, and the bushing is connected to the two bearings.

10. A winding device, characterized in that: It comprises the flower roller as described in any one of claims 1 to 9.

Images