Lithium battery pole piece winding structure

Abstract

The utility model provides a lithium battery pole piece rolling structure which comprises a rolling shaft which is transversely and rotatably arranged, a winding drum which is sleeved on the rolling shaft and is fixed relative to the rolling shaft, a mounting shaft which is parallel and fixed relative to the rolling shaft, and a mounting block which is rotatably sleeved with the mounting shaft, the winding drum is provided with a winding ring face surrounding the winding shaft, the pressing wheel is provided with a vertical projection located on the winding ring face, the pressing wheel is further coaxially and fixedly connected with a limiting wheel with the diameter larger than that of the pressing wheel, and the limiting wheel and the winding drum are staggered. The pole piece winding device solves the problems that in the prior art, due to the fact that a pole piece is narrow, winding is prone to deviation, the winding amount is small, and the follow-up machining continuity is finally affected.

Description

Technical Field

[0001] This utility model relates to the field of winding equipment technology, and in particular to a lithium battery electrode winding structure. Background Technology

[0002] Lithium-ion battery electrodes are flexible materials used in the processing of lithium-ion batteries. They are typically first processed into a wider size, then cut to the required narrower size, and finally wound into rolls for use in lithium-ion battery manufacturing. A wider raw material is cut and wound onto multiple rolls to form multiple electrode rolls. The electrode width on each roll is often small, such as 3-5 cm, making it prone to misalignment during winding. When a large amount is wound, this misalignment is amplified, leading to unwinding (electrode unraveling). Therefore, the amount wound is usually small (the thickness of the electrode roll is 10-15 cm). Since the amount of electrode used in processing is large and the consumption rate is fast, frequent roll changes are necessary, affecting the continuity of subsequent processing and consequently reducing overall efficiency. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a lithium battery electrode winding structure, which solves the problems in existing technologies where the narrow electrode leads to easy winding deviation and small winding amount, ultimately affecting the continuity of subsequent processing.

[0004] According to an embodiment of the present invention, a lithium battery electrode winding structure includes a winding shaft that is laterally rotatable, a drum sleeved on the winding shaft and fixed relative to the winding shaft, an mounting shaft parallel to and fixed relative to the winding shaft, and a mounting block rotatably sleeved with the mounting shaft. A pressure roller is mounted on the mounting block. The drum has a winding ring surface surrounding the winding shaft. The pressure roller has a vertical projection on the winding ring surface. The pressure roller is also coaxially fixedly connected to a limiting wheel with a diameter larger than its diameter. The limiting wheel is offset from the drum.

[0005] In the above embodiments, the pressure roller can roll into contact with the electrode roll during the winding of the electrode sheet, and the limiting roller connected to the pressure roller can provide a limit on the side of the electrode roll, thereby continuously preventing the electrode roll from deviating, so that the electrode roll can be wound up more. Therefore, it solves the problem in the prior art that the winding is easy to deviate due to the narrowness of the electrode sheet, and the small winding amount ultimately affects the continuity of subsequent processing.

[0006] Furthermore, the mounting block is fixedly connected to a connecting arm, which is rotatably sleeved with the mounting shaft.

[0007] Furthermore, one end of the connecting arm is fixedly connected to the mounting block, and the other end is provided with a collar, which is rotatably fitted onto the mounting shaft.

[0008] Furthermore, the mounting shaft has a recessed annular groove, and the collar is rotatably fitted into the annular groove.

[0009] Furthermore, it also includes a limiting strip located below the connecting arm and capable of abutting against the connecting arm, so that the distance between the limiting wheel and the take-up shaft is minimized when the connecting arm and the limiting strip abut against each other.

[0010] Furthermore, the mounting block is fixedly connected to a pair of mounting arms, and each mounting arm is rotatably connected to a connecting shaft. Each connecting shaft is fixedly connected to a pressure roller and a limiting roller, and the two limiting rollers are located outside the two pressure rollers.

[0011] Furthermore, the mounting block is fixedly connected to a pair of mounting arms, and a connecting shaft is rotatably connected between the two mounting arms. A pressure roller and a pair of limit rollers located on both sides of the pressure roller are fixedly connected to the connecting shaft.

[0012] Furthermore, multiple rolls are spaced apart on the take-up shaft, and mounting blocks corresponding to each roll are provided on the mounting shaft.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The pressure roller continuously rolls and contacts the electrode roll as it is wound, providing pressure to make the winding tighter. Meanwhile, the limiting roller provides a limit on the side, thus continuously preventing the electrode roll from shifting. This allows for winding up more electrode rolls, thereby solving the problem in the prior art where the narrow electrode rolls cause easy shifting during winding, resulting in a small winding amount that ultimately affects the continuity of subsequent processing. Attached Figure Description

[0015] Figure 1 This is a partial structural diagram of an embodiment of the present utility model. Figure 1 ;

[0016] Figure 2 This is a partial structural diagram of an embodiment of the present utility model. Figure 2 ;

[0017] Figure 3 This is a partial structural diagram of an embodiment of the present utility model. Figure 3 ;

[0018] Figure 4 This is a schematic diagram of the collar and ring groove connection structure according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the connection structure between the pressure roller and the limiting roller according to one embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the connection structure between the pressure roller and the limiting roller according to another embodiment of the present invention;

[0021] In the above attached figures:

[0022] 1. Rewinding shaft; 2. Roller; 3. Mounting shaft; 4. Mounting block; 5. Pressure roller; 6. Limiting roller; 7. Electrode roll; 8. Limiting strip; 9. Connecting arm; 10. Collar; 11. Mounting arm; 12. Connecting shaft. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] In an exemplary implementation, such as Figure 1-3 As shown, this embodiment provides a lithium battery electrode winding structure, which includes a winding shaft 1 that is laterally rotatable, a drum 2 that is sleeved on the winding shaft 1 and fixed relative to the winding shaft 1, a mounting shaft 3 that is parallel to and fixed relative to the winding shaft 1, and a mounting block 4 that is rotatably sleeved with the mounting shaft 3. A pressure roller 5 is mounted on the mounting block 4. The drum 2 has a winding ring surface surrounding the winding shaft 1. The pressure roller 5 has a vertical projection on the winding ring surface. The pressure roller 5 is also coaxially fixedly connected to a limiting wheel 6 with a diameter larger than its diameter. The limiting wheel 6 is offset from the drum 2.

[0026] In the above embodiments, the pressure roller 5 is in rolling contact with the electrode roll 7 during the winding of the electrode sheet. The limiting roller 6 connected to the pressure roller 5 can provide a limit on the side of the electrode roll 7, thereby continuously preventing the electrode roll 7 from deviating. This allows the electrode roll 7 to be wound up more, making the thickness of the electrode roll 7 greater than the 10-15cm in the prior art. Therefore, it solves the problem in the prior art that the narrow electrode sheet makes it easy to deviate during winding, and the small winding amount ultimately affects the continuity of subsequent processing. Furthermore, the pressure roller 5 in this solution is in continuous rolling contact with the electrode roll 7 during winding, which can provide pressure to the electrode roll 7 to make it more compact. Furthermore, in this solution, multiple rolls 2 are spaced apart on the winding shaft 1, and mounting blocks 4 corresponding to each roll 2 are provided on the mounting shaft 3. That is, multiple electrode rolls 7 are wound up simultaneously, and lateral limiting and pressing are provided for them simultaneously.

[0027] In actual operation, the limiting wheel 6 is initially not in contact with the take-up shaft 1, and the pressure wheel 5 is also not in contact with the drum 2. That is, this winding structure also includes a limiting strip 8 located below the connecting arm 9 and able to abut against the connecting arm 9. When the connecting arm 9 and the limiting strip 8 abut against each other, the distance between the limiting wheel 6 and the take-up shaft 1 is the smallest, so as to avoid mutual interference caused by the limiting wheel 6 contacting the take-up shaft 1. After winding for a period of time, the amount of winding gradually increases, and the electrode roll 7 becomes thicker, so that it can contact the pressure wheel 5 and the side is close to the limiting wheel 6. In the subsequent winding process, as winding progresses, the pressure wheel 5 and the limiting wheel 6 gradually move upward through relative rolling with the electrode roll 7, always providing lateral limiting and downward pressing for the electrode roll 7, ensuring normal and stable winding, so that this solution can obtain a thicker electrode roll 7.

[0028] like Figure 1 , 2 As shown in Figure 4, the mounting block 4 is fixedly connected to a connecting arm 9, which is rotatably sleeved with the mounting shaft 3. One end of the connecting arm 9 is fixedly connected to the mounting block 4, and the other end is provided with a collar 10. The collar 10 is rotatably sleeved on the mounting shaft 3. During the winding process, as the electrode roll 7 becomes thicker, the connecting arm 9 rotates around the mounting shaft 3, thereby ensuring that the pressure roller 5 moves smoothly upward. Furthermore, the mounting shaft 3 is recessed with an annular groove, and the collar 10 is rotatably sleeved in the annular groove. In this way, the collar 10 is rotatably limited in the annular groove and does not move laterally.

[0029] like Figure 1 , 2 As shown in Figures 3 and 5, the mounting block 4 is fixedly connected to a pair of mounting arms 11. The two mounting arms 11 are rotatably connected to a connecting shaft 12. Each connecting shaft 12 is fixedly connected to a pressure roller 5 and a limiting roller 6. The two limiting rollers 6 are located outside the two pressure rollers 5. In this way, the two pressure rollers 5 provide a pressing effect, and the two limiting rollers 6 on both sides provide lateral limiting.

[0030] like Figure 1 , 6 As shown, in another embodiment, the mounting block 4 is fixedly connected to a pair of mounting arms 11, and a connecting shaft 12 is rotatably connected between the two mounting arms 11. A pressure roller 5 and a pair of limiting wheels 6 located on both sides of the pressure roller 5 are fixedly connected to the connecting shaft 12. The pressure roller 5 provides a pressing effect from above, and the two limiting wheels 6 on both sides provide lateral limiting.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lithium battery electrode winding structure, characterized in that, The device includes a take-up shaft that is laterally rotatable, a drum that is sleeved on the take-up shaft and fixed relative to the take-up shaft, a mounting shaft that is parallel to and fixed relative to the take-up shaft, and a mounting block that is rotatably sleeved with the mounting shaft. A pressure roller is mounted on the mounting block. The drum has a take-up ring surface surrounding the take-up shaft. The pressure roller has a vertical projection on the take-up ring surface. The pressure roller is also coaxially fixedly connected to a limiting roller with a diameter larger than its own diameter. The limiting roller is offset from the drum.

2. The lithium battery electrode winding structure as described in claim 1, characterized in that, The mounting block is fixedly connected to a connecting arm, which is rotatably sleeved with the mounting shaft.

3. The lithium battery electrode winding structure as described in claim 2, characterized in that, One end of the connecting arm is fixedly connected to the mounting block, and the other end is provided with a collar, which is rotatably sleeved on the mounting shaft.

4. The lithium battery electrode winding structure as described in claim 3, characterized in that, The mounting shaft has a recessed annular groove, and the collar is rotatably fitted inside the annular groove.

5. The lithium battery electrode winding structure as described in claim 2, characterized in that, It also includes a limiting strip located below the connecting arm and capable of abutting against the connecting arm, wherein the distance between the limiting wheel and the take-up shaft is minimized when the connecting arm and the limiting strip abut against each other.

6. The lithium battery electrode winding structure as described in claim 1, characterized in that, The mounting block is fixedly connected to a pair of mounting arms, and each of the two mounting arms is rotatably connected to a connecting shaft. Each of the connecting shafts is fixedly connected to a pressure roller and a limiting roller, and the two limiting rollers are located outside the two pressure rollers.

7. The lithium battery electrode winding structure as described in claim 1, characterized in that, The mounting block is fixedly connected to a pair of mounting arms, and a connecting shaft is rotatably connected between the two mounting arms. The connecting shaft is fixedly connected to the pressure roller and a pair of limiting rollers located on both sides of the pressure roller.

8. The lithium battery electrode winding structure according to any one of claims 1-7, characterized in that, The take-up shaft has a plurality of drums spaced apart, and the mounting shaft has a mounting block corresponding to each of the drums.

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