Flat-opening needle staggering mechanism for lithium battery winding
By setting a staggered needle structure between the reel of the lithium battery winder and the drum, and using axial and vertical sliding structures to realize the staggered needle, the problems of inaccurate staggered needle and battery core extraction in the prior art are solved, and the pass rate of the battery cell and the flexibility of the equipment are improved.
Patent Information
- Application Number
- CN202421122307.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The existing lithium battery winding machines have complex structures, poor accuracy and needle effects, and can only be staggered in a single direction, resulting in a high probability of the battery core pulling and reducing the battery core pass rate.
A swinged errone mechanism for rolling lithium batteries is designed. By setting a errone structure between the reel and the reel, the axial sliding structure and the vertical sliding structure are used to realize the errone needle, ensuring that there is a gap between the reel and the battery cell when the needle is drawn, and friction is reduced.
By setting up a staggered needle structure, the misalignment between the needle and the battery cell is achieved, the core pulling phenomenon is reduced, the pass rate of the battery cell is improved, and the structure is simple, the movement is stable, and the cost is low.
Smart Images
Figure CN222601036U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a lithium battery core winding structure, in particular to a flat opening and staggered needle mechanism for winding a lithium battery. Background Art
[0002] At present, the staggered needle mechanism of the winding head commonly used in lithium battery winding machines on the market is generally a structure in which half of the winding needles at the winding station are fixed and the other half are movable, and the structure is relatively complicated. The accuracy and effect of the staggered needles are relatively poor during the staggered needle process, and the existing staggered needle structure can only stagger the winding needles in a single direction. Only half of the winding needle sheet has a gap with the bare battery cell, and the other half of the winding needle sheet is fixed and still attached to the bare battery cell. In this state, the next step of unloading is carried out, and the probability of core pulling out of the unloaded battery cell is high, which directly reduces the qualified rate of the battery cell. Utility Model Content
[0003] In order to overcome the shortcomings of the prior art, the utility model provides a staggered needle mechanism for lithium battery winding, in which a staggered needle mechanism is arranged between a winding needle and a winding drum to achieve staggered position of the winding needle when the lithium battery is wound and the needle is withdrawn.
[0004] The technical solution adopted by the utility model to solve its technical problems is: a flat-open staggered needle mechanism for winding a lithium battery, comprising a winding drum, a winding needle and a winding needle driving part, the winding needle comprising an upper winding needle and a lower winding needle, and a staggered needle structure is also arranged between the winding needle, the winding needle driving structure and the winding drum; the upper winding needle and the lower winding needle are driven by the winding needle driving part to rotate synchronously in the winding needle drum, and are used for winding lithium battery cells; the upper winding needle and the lower winding needle are driven by the winding needle driving part to be pulled out of the winding needle drum respectively, so as to realize the withdrawal of the upper winding needle and the lower winding needle in the lithium battery cell; the staggered needle structure is used for staggering the upper winding needle and the lower winding needle in the lithium battery cell.
[0005] As an improvement of the above technical solution, the staggered needle structure includes an axial sliding structure between the winding needle and the winding drum and a vertical sliding structure between the winding needle and the driving part. The axial sliding structure is used for the movement between the winding needle and the winding drum in the direction of the winding needle axis and the movement of the winding needle in the vertical direction. The vertical sliding structure is used for the vertical sliding between the winding needle and the winding needle driving structure.
[0006] As a further improvement of the above technical solution, the vertical sliding structure includes a winding needle mounting block and a linear bushing, the linear bushing is used to fix the winding needle, the winding needle mounting block is driven by a driving part, and the linear bushing is vertically slidably arranged on the winding needle mounting block.
[0007] As a further improvement of the above technical solution, a guide shaft is further provided on the winding needle mounting block, a guide track is provided on the linear bushing, and the linear bushing is slidably arranged on the winding needle mounting block through the cooperation of the guide track and the guide shaft.
[0008] As a further improvement of the above technical solution, the axial sliding structure includes a guide block and a guide shaft, the guide block is provided with a needle shifting slideway, the guide shaft is slidably arranged in the needle shifting slideway of the guide block, and the winding needle is shifted by sliding the guide shaft in the guide block.
[0009] As a further improvement of the above technical solution, the guide block is arranged on the inner wall of the reel, the guide shaft and the winding needle are fixed on the linear bushing, and the winding needle slides in the staggered needle slideway of the guide block through the guide shaft to perform axial and vertical movements.
[0010] As a further improvement of the above technical solution, a bushing mounting seat is further provided at the bottom of the guide shaft, the bushing mounting seat is fixedly connected to the linear bushing, and the guide shaft is rotatably arranged on the bushing mounting seat via a bearing.
[0011] As a further improvement of the above technical solution, the staggered needle slide is arranged in a zigzag manner, the distance between the end position of the staggered needle slide and the drum wall is smaller than the distance between the tail of the staggered needle slide and the drum wall, and the middle position connecting the end and tail of the staggered needle slide is arranged obliquely.
[0012] As a further improvement of the above technical solution, the staggered needle mechanism is arranged between the upper winding needle and the reel, or the staggered needle mechanism is arranged between the lower winding needle and the reel, or the staggered needle mechanism is arranged in one group between the upper winding needle, the lower winding needle and the reel.
[0013] The beneficial effect is that the staggered needle structure that movably connects the upper winding needle and the lower winding needle to the winding drum is arranged on the flat opening staggered needle mechanism of the utility model. Through the staggered needle structure, when the winding needle is pulled out after the winding needle is completed, there is a certain gap between the two winding needles and the bare battery core, which is convenient for removing the needle and cutting. The track-type staggered needle structure is simple to set up, the movement process is stable, and it can be set on both the upper and lower winding needles. It has low cost, high stability, high flexibility, can greatly reduce the phenomenon of battery core pulling, and improve the qualified rate of products. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0015] Figure 1 It is a schematic diagram of the assembly of the utility model;
[0016] Figure 2 It is an enlarged schematic diagram of the needle winding part of the utility model;
[0017] Figure 3 It is a schematic diagram of the orthographic projection of the needle winding part of the utility model;
[0018] Figure 4 It is a cross-sectional schematic diagram of the winding needle part of the utility model;
[0019] Figure 5 It is a schematic diagram of the structure of the staggered needle slideway of the utility model.
[0020] 1. Vertical sliding structure; 11. Winding needle mounting block; 12. Linear bushing; 13. Guide shaft; 2. Axial sliding structure; 21. Guide block; 22. Guide shaft; 23. Staggered needle slideway; 24. Bushing mounting seat; 3. Winding drum; 4. Upper winding needle; 5. Lower winding needle; 6. Winding needle driving part. DETAILED DESCRIPTION
[0021] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.
[0022] Reference Figure 1 , a flat opening staggered needle mechanism for winding lithium batteries, comprising a winding drum 3, a winding needle and a winding needle driving part 6, wherein the winding needle comprises an upper winding needle 4 and a lower winding needle 5, and a staggered needle structure is further arranged between the winding needle, the winding needle driving structure and the winding drum 3; the upper winding needle 4 and the lower winding needle 5 are driven by the winding needle driving part 6 to rotate synchronously in the winding needle cylinder, and are used for winding lithium battery cells; the upper winding needle 4 and the lower winding needle 5 are driven by the winding needle driving part 6 to be pulled out of the winding needle cylinder respectively, so as to realize the needle pulling of the upper winding needle 4 and the lower winding needle 5 in the lithium battery cell. The staggered needle structure is used for staggering the upper winding needle 4 and the lower winding needle 5 in the lithium battery cell. The staggered needle structure can form a misalignment between the two winding needles when the needle is pulled out after the winding of the battery cell is completed, so that the friction force at the position where the winding needle contacts the battery cell is reduced, and the phenomenon of core pulling of the wound battery cell is avoided.
[0023] The staggered needle mechanism is arranged between the upper winding needle 4 and the reel 3, or the staggered needle mechanism is arranged between the lower winding needle 5 and the reel 3, or one group of the staggered needle mechanism is arranged between the upper winding needle 4, the lower winding needle 5 and the reel 3. This flexibly arranged staggered needle mechanism greatly increases the flexibility of the winding structure, and the staggered needle mechanism is arranged on the two winding needles respectively to realize that the two winding needles of the winding station are synchronously opened after the needles are inserted into place, and synchronously closed after the needles are pulled out of place. After the needles are staggered in this way, there is a certain gap between the two winding needle sheets and the bare battery cells, which is convenient for removing the needles and cutting materials. This method can greatly reduce the phenomenon of battery core pulling and improve the qualified rate of products.
[0024] Reference Figure 2 Since the winding needle is also provided with a winding needle driving part 6 for driving the winding needle, when the staggered needle mechanism drives the winding needle to move in a direction perpendicular to the winding needle axis, a misalignment between the winding needle and the winding needle handle driving part will be formed. Therefore, the staggered needle structure includes an axial sliding structure 2 between the winding needle and the winding drum 3 and a vertical sliding structure 1 between the winding needle and the driving part. The axial sliding structure 2 is used for the movement between the winding needle and the winding drum 3 in the direction of the winding needle axis and the movement of the winding needle in the vertical direction (i.e., the direction perpendicular to the winding needle axis), and the vertical sliding structure 1 is used for the vertical sliding between the winding needle and the winding needle driving structure. When the winding needle completes the winding of the battery cell, the winding needle driving part 6 drives the upper winding needle 4 and the lower winding needle 5 to withdraw the needle, and passes through the axial sliding structure 2 while withdrawing the needle. The axial sliding structure 2 makes the two winding needles subject to force in the vertical direction. Therefore, the axial vertical sliding structure 1 set between the winding needle and the winding needle driving part 6 starts to operate, so that the winding needle and the winding needle driving part 6 form a misalignment in the axial direction perpendicular to the axial direction, and cooperates with the axial sliding structure 2 to complete the staggered needle process of the winding needle. This design ensures the stable operation of the needle staggering, and will not affect the needle withdrawal and needle insertion of the needle winding drive part 6, and several activity processes are carried out synchronously, ensuring the efficiency of the needle winding, needle staggering and needle withdrawal.
[0025] Specific reference Figure 3 , Figure 4 , Figure 5The axial sliding structure 2 includes a guide block 21 and a guide shaft 22. The guide block 21 is provided with a staggered needle slideway 23. The guide shaft 22 is slidably arranged in the staggered needle slideway 23 of the guide block 21, and the winding needle is staggered by the sliding of the guide shaft 22 in the guide block 21. The guide block 21 is arranged on the inner wall of the winding drum 3. The guide shaft 22 and the winding needle are both fixed on the linear bushing 12. The winding needle slides in the staggered needle slideway 23 of the guide block 21 through the guide shaft 22 to perform axial movement and vertical movement. A bushing mounting seat 24 is also provided at the bottom of the guide shaft 22. The bushing mounting seat 24 is fixedly connected to the linear bushing 12, and the guide shaft 22 is rotatably arranged on the bushing mounting seat 24 through a bearing. The guide shaft 22 rotatably arranged on the bushing mounting seat 24 is more flexible when sliding in the staggered needle slideway 23 and is not prone to jamming. The staggered needle slide 23 is arranged in a zigzag manner, and the distance between the end position of the staggered needle slide 23 and the wall of the reel 3 is smaller than the distance between the tail of the staggered needle slide 23 and the wall of the reel 3, and the middle position connecting the end and the tail of the staggered needle slide 23 is arranged obliquely.
[0026] The vertical sliding structure 1 includes a winding needle mounting block 11 and a linear bushing 12. The linear bushing 12 is used to fix the winding needle. The winding needle mounting block 11 is driven by a driving part. The linear bushing 12 is vertically slidably arranged on the winding needle mounting block 11. A guide shaft 13 is also arranged on the winding needle mounting block 11. A guide track is arranged on the linear bushing 12. The linear bushing 12 is slidably arranged on the winding needle mounting block 11 through the cooperation of the guide track and the guide shaft 13. The winding needle mounting block 11 is mainly used to connect the winding needle with the winding needle driving part 6 to ensure that the winding needle can form a stable driving connection with the winding needle driving part 6 when the needle is misaligned. Since the winding needle mounting block 11 is wrapped outside the linear bushing 12, the guide shaft 13 is fixed at the top and bottom of the winding needle mounting block 11, and the linear bushing 12 slides inside the winding needle mounting block 11, so as to prevent the linear bushing 12 from sliding beyond the specified range. A through slot is also provided on the top of the winding needle mounting block 11 , and the bushing mounting seat 24 passes through the through slot and is fixedly connected to the linear bushing 12 , and the bushing mounting seat 24 is slidably arranged in the through slot.
[0027] The specific operation process of the staggered needle mechanism is as follows: when the winding needle completes the winding of the battery cell, the winding needle driving part 6 drives the upper winding needle 4 and the lower winding needle 5 to withdraw the needle. When withdrawing the needle, the winding needle moves backward, and at the same time, the guide shaft 22 connected to the winding needle through the linear bushing 12 will slide through the reel 3 due to the backward movement of the winding needle, that is, the guide shaft 22 slides through the guide track set on the inner wall of the reel 3. Since the guide track is not a straight track, when the guide shaft 22 connected to the winding needle is located at the end of the guide track, the guide shaft 22 is located at the position closest to the wall of the reel 3. At this time, the distance between the upper winding needle 4 and the lower winding needle 5 is the largest, and there is also a sliding misalignment between the linear bushing 12 and the winding needle mounting block 11. As the needle is withdrawn, the guide shaft 22 interacts in the direction away from the wall of the reel 3 at the position closest to the wall of the reel 3 in the guide track, and the linear bushing 12 and the winding needle also slide in the same direction. At this time, the distance between the two winding needles is reduced, so that the distance between the winding needle and the battery cell is increased, thereby reducing the friction between the winding needle and the battery cell when the needle is withdrawn, avoiding the battery cell from being pulled out during the needle withdrawal process.
[0028] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A flat opening and staggered needle mechanism for winding lithium batteries, characterized in that: It includes a winding drum, a winding needle and a winding needle driving part, wherein the winding needle includes an upper winding needle and a lower winding needle, and a staggered needle structure is also arranged between the winding needle, the winding needle driving structure and the winding drum; The upper winding needle and the lower winding needle are driven by the winding needle driving part to rotate synchronously in the winding needle cylinder, and are used for winding the lithium battery cell; The upper winding needle and the lower winding needle are driven by the winding needle driving part to be pulled out in the winding needle cylinder respectively, so as to realize the pulling out of the upper winding needle and the lower winding needle in the lithium battery cell; The staggered needle structure is used for staggering the upper winding needle and the lower winding needle in the lithium battery cell.
2. According to claim 1, a flat opening and staggered needle mechanism for winding a lithium battery, characterized in that: The staggered needle structure includes an axial sliding structure between the winding needle and the winding drum and a vertical sliding structure between the winding needle and the driving part. The axial sliding structure is used for the movement between the winding needle and the winding drum in the direction of the winding needle axis and the movement of the winding needle in the vertical direction. The vertical sliding structure is used for the vertical sliding between the winding needle and the winding needle driving structure.
3. According to claim 2, a flat opening and staggered needle mechanism for winding a lithium battery, characterized in that: The vertical sliding structure includes a winding needle mounting block and a linear bushing, wherein the linear bushing is used to fix the winding needle, the winding needle mounting block is driven by a driving part, and the linear bushing is vertically slidably arranged on the winding needle mounting block.
4. According to claim 3, a flat opening and staggered needle mechanism for winding a lithium battery, characterized in that: The winding needle mounting block is also provided with a guide shaft, and the linear bushing is provided with a guide track. The linear bushing is slidably arranged on the winding needle mounting block through the cooperation of the guide track and the guide shaft.
5. According to claim 3, a flat opening and staggered needle mechanism for winding a lithium battery, characterized in that: The axial sliding structure includes a guide block and a guide shaft. The guide block is provided with a needle shifting slideway. The guide shaft is slidably arranged in the needle shifting slideway of the guide block. The winding needle is shifted by sliding the guide shaft in the guide block.
6. A flat opening and staggered needle mechanism for winding lithium batteries according to claim 5, characterized in that: The guide block is arranged on the inner wall of the winding drum, the guide shaft and the winding needle are both fixed on the linear bushing, and the winding needle slides in the staggered needle slideway of the guide block through the guide shaft to perform axial movement and vertical movement.
7. A flat opening and staggered needle mechanism for winding a lithium battery according to claim 6, characterized in that: A bushing mounting seat is also provided at the bottom of the guide shaft, and the bushing mounting seat is fixedly connected to the linear bushing. The guide shaft is rotatably arranged on the bushing mounting seat through a bearing.
8. A flat opening and staggered needle mechanism for winding a lithium battery according to claim 5 or 6, characterized in that: The staggered needle slide is arranged in a zigzag manner, the distance between the end of the staggered needle slide and the drum wall is smaller than the distance between the tail of the staggered needle slide and the drum wall, and the middle position connecting the end and the tail of the staggered needle slide is arranged obliquely.
9. A flat opening and staggered needle mechanism for winding a lithium battery according to claim 1, characterized in that: The staggered needle mechanism is arranged between the upper winding needle and the winding drum, or the staggered needle mechanism is arranged between the lower winding needle and the winding drum, or one group of staggered needle mechanisms is arranged between the upper winding needle, the lower winding needle and the winding drum.