Button cell winding equipment

Abstract

The utility model provides button battery winding equipment which comprises a discharging device and a winding device, the discharging device comprises a first pole piece discharging device, a second pole piece discharging device, a first diaphragm discharging device and a second diaphragm discharging device, the first pole piece discharging device is used for outputting a first pole piece, the second pole piece discharging device is used for outputting a second pole piece, the first diaphragm discharging device is used for outputting a first diaphragm, and the second diaphragm discharging device is used for outputting a second diaphragm; the winding device is used for winding the first pole piece, the second pole piece, the first diaphragm and the second diaphragm into a battery cell; a first diaphragm passing roller is arranged between the first diaphragm discharging device and the winding device, a second diaphragm passing roller is arranged between the second diaphragm discharging device and the winding device, and the second diaphragm passing roller can be close to or away from the first diaphragm passing roller. According to the utility model, the length of the free section of the second pole piece can be shortened, the volatility of the free section of the second pole piece is reduced, and the winding alignment precision and the quality of a battery cell can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery processing, and more specifically, to a button battery winding device. Background Art

[0002] A button battery generally includes a housing and an electrode core. Usually, a positive electrode strip, a separator, and a negative electrode strip are fed into a button battery winding device. After the positive electrode strip, the negative electrode strip, and the separator are wound to a certain length, the positive electrode strip and the negative electrode strip are cut into electrode sheets (the positive electrode sheet and the negative electrode sheet respectively), and then the electrode sheets and the separator are wound to form an electrode core. With the continuous improvement of the requirements for button batteries, the quality of the electrode core is also constantly improved, and the alignment degree is an important parameter for measuring the quality of the electrode core. Improving the alignment degree can effectively improve the quality of the electrode core.

[0003] However, in the existing button battery winding device, the distance between the winding needle and the deviation rectifying roller is relatively far. After the electrode sheet is cut, the tail electrode sheet will be out of control when it breaks away from the deviation rectifying roller, which is likely to cause poor alignment of the electrode sheet, thus affecting the quality of the electrode core. Summary of the Utility Model

[0004] The utility model aims to solve the problem that the existing button battery winding device is likely to cause poor alignment of the electrode sheet and affect the quality of the electrode core.

[0005] To solve the above problems, the utility model provides a button battery winding device, including:

[0006] A feeding device, the feeding device includes a first electrode sheet feeding device, a second electrode sheet feeding device, a first separator feeding device, and a second separator feeding device. The first electrode sheet feeding device is used to output a first electrode sheet, the second electrode sheet feeding device is used to output a second electrode sheet, the first separator feeding device is used to output a first separator, and the second separator feeding device is used to output a second separator;

[0007] A winding device, the winding device winds the first electrode sheet, the second electrode sheet, the first separator, and the second separator into an electrode core;

[0008] A first separator idler is arranged between the first separator feeding device and the winding device, a second separator idler is arranged between the second separator feeding device and the winding device, and the second separator idler can be close to or far away from the first separator idler.

[0009] Further, when the second separator idler is close to the first separator idler, the second electrode sheet can be pressed between the first separator and the second separator.

[0010] Further, it further includes a first deviation rectifying component and a second deviation rectifying component. The first deviation rectifying component is arranged between the winding device and the first pole piece feeding device, and the second deviation rectifying component is arranged between the winding device and the second pole piece feeding device.

[0011] Further, after the second pole piece passes through the second deviation rectifying component, it is conveyed between the first separator roller and the second separator roller.

[0012] Further, it further includes a separator movable roller assembly. The separator movable roller assembly includes a driving member, and the second separator roller is installed on the separator movable roller assembly. The driving member is used to drive the second separator roller to approach or move away from the first separator roller.

[0013] Further, the separator movable roller assembly further includes a support frame, a first roller fixing block, a connecting block, a slide rail and a slide rail mounting block. The first roller fixing block, the connecting block, the slide rail, the slide rail mounting block and the driving member are all installed on the support frame. The second separator roller is installed on the first roller fixing block. The slide rail extends along a first direction. The slide rail mounting block is slidably connected with the slide rail. The first roller fixing block is connected with the slide rail mounting block through the connecting block, and the connecting block is connected with the driving member. The driving member drives the connecting block to drive the first roller fixing block to move along the first direction, so that the second separator roller approaches or moves away from the first separator roller.

[0014] Further, the separator movable roller assembly further includes a second roller fixing block. The second roller fixing block is installed on the support frame. A third separator roller is installed on the second roller fixing block. The second separator runs between the third separator roller and the second separator roller.

[0015] Further, it further includes a first cutting knife and a second cutting knife. The first cutting knife is arranged between the first pole piece feeding device and the first deviation rectifying component, and the first cutting knife is used for cutting the first pole piece; the second cutting knife is arranged between the second pole piece feeding device and the second deviation rectifying component, and the second cutting knife is used for cutting the second pole piece.

[0016] Further, it further includes a frame. The first pole piece feeding device, the second pole piece feeding device, the first separator feeding device, the second separator feeding device and the winding device are all arranged on the frame, and the first separator roller is fixedly arranged on the frame.

[0017] The button cell winding device described in the present utility model can make the second separator roller approach or move away from the first separator roller. When the second separator roller approaches the first separator roller, the second pole piece can be pressed between the first separator roller and the second separator roller, so that the second pole piece can still maintain tension after leaving the deviation rectifying component, shortening the length of the free section of the second pole piece, which is beneficial to improving the alignment of the first pole piece, the second pole piece, the first separator and the second separator, and improving the winding alignment accuracy. At the same time, the first separator roller and the second separator roller can press the second pole piece between the first separator and the second separator, and the second pole piece is wrapped by the first separator and the second separator to form a whole, which is beneficial to enhancing the rigidity of the second pole piece, reducing the fluctuation of the free section of the second pole piece, being beneficial to further improving the winding alignment accuracy, and can also reduce the probability of the first pole piece and the second pole piece being folded or wrinkled during winding, which is beneficial to improving the quality of the battery cell. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the second separator roller moving away from the first separator roller in the button cell winding device provided in the embodiment of the present utility model;

[0019] Figure 2 It is a schematic structural diagram of the second separator roller approaching the first separator roller in the button cell winding device provided in the embodiment of the present utility model;

[0020] Figure 3 It is a three-dimensional structural diagram of the separator movable roller assembly provided in the embodiment of the present utility model;

[0021] Figure 4 It is a side view structural diagram of the separator movable roller assembly provided in the embodiment of the present utility model. Detailed Embodiments

[0022] The technical solution of the present utility model will be clearly and elaborately described below with reference to the accompanying drawings. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "perpendicular", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present 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, so it cannot be understood as a limitation to the present 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 specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In addition, in the description of the present utility model, the meaning of "at least one" is one or more, and the meaning of "at least two" is two or more, unless otherwise specifically defined.

[0023] In the description of this specification, the description of the term "as an alternative embodiment" means that the specific features, structures, materials or characteristics described in connection with this embodiment or example are included in at least one alternative embodiment or alternative example of the present utility model. In this specification, the schematic expression of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0024] Combined with Figures 1 to 2As shown in the figure, this embodiment provides a button cell winding device, including: a frame (not shown in the figure) and a first pole piece feeding device 10, a second pole piece feeding device 11, a first separator feeding device (not labeled in the figure), a second separator feeding device (not labeled in the figure), a winding device 20, a first deviation rectifying assembly 30, and a second deviation rectifying assembly 31 installed on the frame. Among them: the first pole piece feeding device 10 is used to output a first pole piece 1, the second pole piece feeding device 11 is used to output a second pole piece 2, the first separator feeding device is used to output a first separator 3, the second separator feeding device is used to output a second separator 4. A winding needle is provided on the winding device 20, and the winding needle winds the first pole piece 1, the second pole piece 2, the first separator 3, and the second separator 4 into an electric core. The first deviation rectifying assembly 30 is arranged between the winding device 20 and the first pole piece feeding device 10, and the first deviation rectifying assembly 30 is used to adjust the position of the first pole piece 1 to rectify the first pole piece 1. The second deviation rectifying assembly 31 is arranged between the winding device 20 and the second pole piece feeding device 11, and the second deviation rectifying assembly 31 is used to adjust the position of the second pole piece 2 to rectify the second pole piece 2. One of the first pole piece 1 and the second pole piece 2 is a positive electrode piece, and the other is a negative electrode piece.

[0025] A first separator roller 40 is arranged between the first separator feeding device 13 and the winding device 20. The first separator roller 40 is fixedly arranged on the frame. A separator movable roller assembly 50 is arranged between the second separator feeding device and the winding device 20. A second separator roller 51 is arranged on the separator movable roller assembly 50. The separator movable roller assembly 50 can drive the second separator roller 51 along a first direction (i.e., the connecting line direction between the axes of the first separator roller 40 and the second separator roller 51, that is Figure 1Move in the x-axis direction (in the figure) to approach or move away from the first diaphragm roller 40. Moreover, the first diaphragm roller 40 and the second diaphragm roller 51 are located between the second deviation rectifying assembly 31 and the winding device 20, so that the second pole piece 2 after passing through the second deviation rectifying assembly 31 is conveyed between the first diaphragm roller 40 and the second diaphragm roller 51. Thus, when the second diaphragm roller 51 moves away from the first diaphragm roller 40, the first diaphragm 3, the second pole piece 2, and the third diaphragm 4 can pass through the space between the first diaphragm roller 40 and the second diaphragm roller 51; when the second diaphragm roller 51 approaches the first diaphragm roller 40, the first diaphragm roller 40 and the second diaphragm roller 51 can press the second pole piece 2, so that the second pole piece 2 can still maintain tension after leaving the second deviation rectifying assembly 31, shortening the length of the free section of the second pole piece 2, which is beneficial to improving the alignment degree of the first pole piece 1, the second pole piece 2, the first diaphragm 3, and the second diaphragm 4, and improving the winding alignment accuracy; at the same time, the first diaphragm roller 40 and the second diaphragm roller 51 can press the second pole piece 2 between the first diaphragm 3 and the second diaphragm 4, and the second pole piece 2 is wrapped by the first diaphragm 3 and the second diaphragm 4 to form a whole, which is beneficial to enhancing the rigidity of the second pole piece 2, reducing the volatility of the free section of the second pole piece 2, being beneficial to further improving the winding alignment accuracy, and can also reduce the probability of the first pole piece 1 and the second pole piece 2 being folded or wrinkled during winding, which is beneficial to improving the quality of the battery cell.

[0026] In the prior art, the position of the second separator roller 51 is fixed, so that the second separator roller 51 cannot move relative to the first separator roller 40. After the first electrode tab 1 and the second electrode tab 2 are inserted into the winding needle, the winding needle rotates to drive the first electrode tab 1, the second electrode tab 2, the first separator 3 and the second separator 4 to rotate to a battery cell of a preset size. Then, the first alignment assembly 30 presses the first electrode tab 1, and the second alignment assembly 31 presses the second electrode tab 2. After the first electrode tab 1 and the second electrode tab 2 are cut off, the tails of the first electrode tab 1 and the second electrode tab 2 continue to wind with the rotation of the winding needle. However, after the tail of the first electrode tab 1 disengages from the first alignment assembly 30 and the tail of the second electrode tab 2 disengages from the second alignment assembly 31, the tails of the first electrode tab 1 and the second electrode tab 2 are in a free state, making the first electrode tab 1 and the second electrode tab 2 out of control and likely to result in poor alignment between the first electrode tab 1 and the second electrode tab 2. In the embodiments of the present application, to solve the above problems, a separator movable roller assembly 50 is provided, and the second separator roller 51 is arranged on the separator movable roller assembly 50. Moreover, the separator movable roller assembly 50 can drive the second separator roller 51 to approach or move away from the first separator roller 40, so that the second electrode tab 2 that has disengaged from the second alignment assembly 31 can be pressed by the first separator roller 40 and the second separator roller 51, enabling the second electrode tab 2 to maintain tension, shortening the length of the free section of the second electrode tab 2, facilitating the improvement of the alignment between the first electrode tab 1 and the second electrode tab 2, and being beneficial to enhancing the rigidity of the second electrode tab 2, reducing the fluctuation of the free section of the second electrode tab 2, and further facilitating the improvement of the winding alignment accuracy.

[0027] Combined with Figure 3 and Figure 4As shown, on the basis of the above embodiment, as an alternative embodiment, the diaphragm movable roller assembly 50 further includes a support frame 52, a first roller fixing block 53, a connecting block 54, a slide rail 55, a slide rail mounting block 56, and a driving member 57, where: The first roller fixing block 53, the connecting block 54, the slide rail 55, the slide rail mounting block 56, and the driving member 57 are all mounted on the support frame 52. The slide rail 55 extends in the first direction. The slide rail mounting block 56 is connected to the slide rail 55, so that the slide rail mounting block 56 can slide along the slide rail 55. The first roller fixing block 53 is connected to the slide rail mounting block 56 through the connecting block 54, and the connecting block 54 is connected to the driving member 57. Thus, the driving member 57 drives the connecting block 54 to move, and the connecting block 54 drives the slide rail mounting block 56 and the first roller fixing block 53 to move along the slide rail 55, thereby driving the first roller fixing block 53 to move in the first direction. The second diaphragm passing roller 51 is mounted on the first roller fixing block 53. When the first roller fixing block 53 moves in the first direction, it can drive the second diaphragm passing roller 51 to move in the first direction, so that the second diaphragm passing roller 51 approaches or moves away from the first diaphragm passing roller 40. In the embodiment of the present application, the diaphragm movable roller assembly 50 adopts the above structure, which is beneficial to improving the stability of the second diaphragm passing roller 51 moving in the first direction, and avoiding shaking when the second diaphragm passing roller 51 and the first diaphragm passing roller 40 press the second pole piece 2, which affects the alignment accuracy of the second pole piece 2 and the first pole piece 1. Among them, the driving member 57 can adopt a cylinder.

[0028] On the basis of the above embodiment, as an alternative embodiment, the diaphragm movable roller assembly 50 further includes a second roller fixing block 58. The second roller fixing block 58 is fixedly mounted on the support frame 52. A third diaphragm passing roller 59 is mounted on the second roller fixing block 58. When the second diaphragm passing roller 51 moves in the first direction, the position of the third diaphragm passing roller 59 remains unchanged, and the second diaphragm 4 runs between the third diaphragm passing roller 59 and the second diaphragm passing roller 51. Thus, the second diaphragm 4 is conveyed more smoothly.

[0029] On the basis of the above embodiment, as an alternative embodiment, the button battery winding device further includes a first cutting knife 60 and a second cutting knife 61. The first cutting knife 60 is arranged between the first pole piece feeding device 10 and the first deviation rectifying assembly 30, and the first cutting knife 60 is used for cutting the first pole piece 1; The second cutting knife 61 is arranged between the second pole piece feeding device 11 and the second deviation rectifying assembly 31, and the second cutting knife 61 is used for cutting the second pole piece 2. Thus, when the winding needle drives the first pole piece 1, the second pole piece 2, the first diaphragm 3, and the second diaphragm 4 to rotate to a battery core of a preset size, the first cutting knife 60 cuts off the first pole piece 1, and the second cutting knife 61 cuts off the second pole piece 2, so as to facilitate the winding of the next battery core.

[0030] The following combines Figure 1 and Figure 2The working principle of the button battery winding device in this embodiment will be described:

[0031] The first electrode sheet feeding device 10 outputs the first electrode sheet 1, the second electrode sheet feeding device 11 outputs the second electrode sheet 2, the first separator feeding device outputs the first separator 3, and the second separator feeding device outputs the second separator 4. After the first electrode sheet 1 and the second electrode sheet 2 pass through the winding needle, the winding needle rotates to drive the first electrode sheet 1, the second electrode sheet 2, the first separator 3, and the second separator 4 to rotate. Until the battery cell of the preset size is wound, the first deviation correction component 30 presses the first electrode sheet 1, and the second deviation correction component 31 presses the second electrode sheet 2. At the same time, the driving member 57 drives the first roller fixing block 53 and the second separator roller 51 installed on the first roller fixing block 53 to approach the first separator roller 40 through the driving connection block 54, so that the first separator roller 40 and the second separator roller 51 press the second electrode sheet 2. Subsequently, the first cutting knife 60 cuts off the first electrode sheet 1, and the second cutting knife 61 cuts off the second electrode sheet 2. After the tail of the second electrode sheet 2 breaks away from the second deviation correction component 31, it is still pressed by the first separator roller 40 and the second separator roller 51 until the second electrode sheet 2 breaks away from the first separator roller 40 and the second separator roller 51. The tails of the first electrode sheet 1 and the second electrode sheet 2 continue to be wound into the battery cell with the rotation of the winding needle, completing the winding of the battery cell of the preset size.

[0032] It should be noted that in this embodiment, the specific structures of the first electrode sheet feeding device 10, the second electrode sheet feeding device 11, the first separator feeding device, the second separator feeding device, the winding device 20, the first deviation correction component 30, the second deviation correction component 31, the first cutting knife 60, and the second cutting knife 61 are not further limited. Those skilled in the art can select the corresponding components commonly used in the art according to the actual situation.

[0033] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Without departing from the spirit and scope of the present disclosure, those skilled in the art can make various changes and modifications, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A button battery winding device, characterized in that, Comprising: A feeding device, which includes a first electrode sheet feeding device, a second electrode sheet feeding device, a first separator feeding device, and a second separator feeding device. The first electrode sheet feeding device is used to output a first electrode sheet, the second electrode sheet feeding device is used to output a second electrode sheet, the first separator feeding device is used to output a first separator, and the second separator feeding device is used to output a second separator; A winding device, which winds the first electrode sheet, the second electrode sheet, the first separator, and the second separator into an electric core; A first separator guide roller is arranged between the first separator feeding device and the winding device, and a second separator guide roller is arranged between the second separator feeding device and the winding device. The second separator guide roller can be close to or far from the first separator guide roller.

2. The button battery winding device according to claim 1, characterized in that, When the second separator guide roller is close to the first separator guide roller, the second electrode sheet can be pressed between the first separator and the second separator.

3. The button cell winding device according to claim 1, characterized in that It further includes a first deviation rectifying component and a second deviation rectifying component. The first deviation rectifying component is arranged between the winding device and the first electrode sheet feeding device, and the second deviation rectifying component is arranged between the winding device and the second electrode sheet feeding device.

4. The button cell winding device according to claim 3, wherein After passing through the second deviation rectifying component, the second electrode sheet is conveyed between the first separator guide roller and the second separator guide roller.

5. The button cell winding device according to claim 1, characterized in that It further includes a separator movable roller assembly, which includes a driving member. The second separator guide roller is installed on the separator movable roller assembly, and the driving member is used to drive the second separator guide roller to be close to or far from the first separator guide roller.

6. The button cell winding device according to claim 5, characterized in that, The separator movable roller assembly further includes a support frame, a first roller fixing block, a connecting block, a slide rail, and a slide rail mounting block. The first roller fixing block, the connecting block, the slide rail, the slide rail mounting block, and the driving member are all installed on the support frame. The second separator guide roller is installed on the first roller fixing block. The slide rail extends in a first direction, the slide rail mounting block is slidably connected to the slide rail, the first roller fixing block is connected to the slide rail mounting block through the connecting block, and the connecting block is connected to the driving member. The driving member drives the connecting block to drive the first roller fixing block to move in the first direction, so that the second separator guide roller is close to or far from the first separator guide roller.

7. The button cell winding device according to claim 6, characterized in that, The separator movable roller assembly further includes a second roller fixing block, which is installed on the support frame. A third separator guide roller is installed on the second roller fixing block, and the second separator runs between the third separator guide roller and the second separator guide roller.

8. The button cell winding device according to claim 3, characterized in that, It further includes a first cutting knife and a second cutting knife. The first cutting knife is arranged between the first electrode sheet feeding device and the first deviation rectifying component, and the first cutting knife is used to cut the first electrode sheet; the second cutting knife is arranged between the second electrode sheet feeding device and the second deviation rectifying component, and the second cutting knife is used to cut the second electrode sheet.

9. The button cell winding device according to claim 1, characterized in that, It further includes a frame, and the first pole piece feeding device, the second pole piece feeding device, the first separator feeding device, the second separator feeding device and the winding device are all arranged on the frame, and the first separator roller is fixedly arranged on the frame.

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