Winding needle structure and battery cell winding device
By setting suction holes and blow holes on the fixed and movable roll needles, and controlling the movement of the diaphragm by airflow, the electrostatic adsorption problem between the isolation film and the roll needle is solved, the core extraction is poor, and the battery thickness consistency is improved.
Patent Information
- Application Number
- CN202421495183.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-06-26
AI Technical Summary
In the prior art, the needle roll structure cannot effectively eliminate static electricity between the isolation film and the needle roll, causing the isolation film to adsorb the needle roll, causing the problem of poor core extraction, and cannot meet the requirements of battery thickness consistency.
The airflow is provided with a suction hole and a blow hole on the fixed and movable needles. The diaphragm is blown away by airflow to eliminate static electricity between the diaphragm and the needle, and the movement of the diaphragm is controlled through the positive and negative ion air of the airflow to ensure that the diaphragm is smoothly removed from the needle.
Effectively avoid diaphragm adsorption of needles, improve poor core extraction, and improve battery thickness consistency.
Smart Images
Figure CN223140808U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of cell winding, in particular to a winding needle structure and a cell winding device. Background Art
[0002] At present, the blowing structure of the polymer square battery winding needle sets ventilation grooves on the movable winding needle and the fixed winding needle body. The ventilation groove openings on the surface of the winding needle body are correspondingly provided with air inlets. At the same time, a plurality of blowing ports are arranged along the air inlets to conduct the ventilation grooves. Finally, the ventilation groove openings are sealed. When the winding needle is pulled out, gas is injected into the air inlets, and the ion wind blown out by the blowing ports of the winding needle body is used to eliminate the static electricity between the separator and the winding needle, avoid the adsorption of the separator to the winding needle body, enable the separator to smoothly separate from the winding needle body, and improve the problem of poor core extraction.
[0003] In the related art, the blowing ports are arranged on the surface of the winding needle body, which can only reduce the static electricity between the surface of the winding needle body and the separator, but cannot solve the static electricity adsorption between the separator clamp and the separator. The core extraction position often concentrates on the separator clamp strip area, or the blowing ports of the winding needle are directly arranged on the movable separator clamp. However, this can only achieve one-way blowing. The folding shape of the inner-layer separator and the tooth shape of the separator clamp for clamping the separator are flexibly selected according to the different assembly positions of the fixed winding needle body and the movable winding needle body to perform positive-pressure blowing or negative-pressure suction on the fixed separator clamp strip or the movable separator clamp strip. As a result, the device cannot meet the actual application and cannot solve the problem of flattening the inner-layer separator, and thus cannot achieve the purpose of improving the thickness consistency of the battery. Summary of the Utility Model
[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a winding needle structure, which can eliminate the static electricity between the separator and the winding needle, thus avoiding the adsorption of the separator to the winding needle body, and further improving the problem of poor core extraction.
[0005] The utility model further provides a vehicle.
[0006] According to the winding needle structure of the utility model, it includes: a fixed winding needle and a movable winding needle. The fixed winding needle has a first membrane clamping surface, and the first membrane clamping surface is provided with a first air hole. The movable winding needle is movable relative to the fixed winding needle. The movable winding needle has a second membrane clamping surface. The first membrane clamping surface and the second membrane clamping surface are arranged opposite to each other and are used for jointly clamping the separator. The second membrane clamping surface is provided with a second air hole. One of the first air hole and the second air hole is a suction hole and the other is a blowing hole.
[0007] According to the coiling needle structure of the present utility model, by providing air suction holes and air blowing holes on the fixed coiling needle and the movable coiling needle, such a setting can utilize the air flow to blow open the diaphragm, and the ionic wind blown out from the air blowing holes on the fixed coiling needle and the movable coiling needle eliminates the static electricity between the diaphragm and the fixed coiling needle and the movable coiling needle, thereby avoiding the adsorption of the diaphragm to the fixed coiling needle and the movable coiling needle, and also enabling the diaphragm to smoothly disengage from the fixed coiling needle and the movable coiling needle, and further improving the problem of poor core pulling.
[0008] In some examples of the present utility model, there are multiple first air holes, and the multiple first air holes are spaced apart in the length direction of the first film clamping surface; there are multiple second air holes, and the multiple second air holes are spaced apart in the length direction of the second film clamping surface.
[0009] In some examples of the present utility model, the multiple first air holes and the multiple second air holes correspond one by one, and the central axes of the corresponding first air holes and second air holes are collinear.
[0010] In some examples of the present utility model, the fixed coiling needle includes: a fixed coiling needle body and a fixed diaphragm clamp. The fixed coiling needle body forms a first air path, the fixed diaphragm clamp is arranged on the fixed coiling needle body, the first film clamping surface is arranged on the fixed diaphragm clamp, and the first air hole is communicated with the first air path; the movable coiling needle includes: a movable coiling needle body and a movable diaphragm clamp. The movable coiling needle body forms a second air path, the movable diaphragm clamp is arranged on the movable coiling needle body, the second film clamping surface is arranged on the movable diaphragm clamp, and the second air hole is communicated with the second air path.
[0011] In some examples of the present utility model, the first air path includes: a first main air path and a first branch air path. The first main air path extends along the length direction of the fixed coiling needle body, one end of the first main air path is provided with a first air port connected to a first air pressure device, the first branch air path is perpendicular to the first main air path, and the first branch air path is respectively communicated with the first main air path and the first air hole; and / or the second air path includes: a second main air path and a second branch air path. The second main air path extends along the length direction of the movable coiling needle body, one end of the second main air path is provided with a second air port connected to a second air pressure device, the second branch air path is perpendicular to the second main air path, and the second branch air path is respectively communicated with the second main air path and the second air hole.
[0012] In some examples of the present utility model, the fixed coiling needle further includes: a fixed joint, the fixed joint is connected between the first air path and the first air hole, and the fixed joint can be elastically deformed; and / or the movable coiling needle further includes: a movable joint, the movable joint is connected between the first air path and the first air hole, and the movable joint can be elastically deformed.
[0013] In some examples of the present utility model, the fixed bobbin body is provided with a first clamping portion, the fixed diaphragm clip is provided with a second clamping portion, the first clamping portion and the second clamping portion are clamped and matched and allow the fixed diaphragm clip to move in a direction close to and away from the movable bobbin; and / or the movable bobbin body is provided with a third clamping portion, the movable diaphragm clip is provided with a fourth clamping portion, the third clamping portion and the fourth clamping portion are clamped and matched and allow the movable diaphragm clip to move in a direction close to and away from the fixed bobbin.
[0014] In some examples of the present utility model, a first fastener is provided between the fixed bobbin body and the fixed diaphragm clip, and the first fastener limits the extreme position of the fixed diaphragm clip close to the movable bobbin; and / or a second fastener is provided between the movable bobbin body and the movable diaphragm clip, and the second fastener limits the extreme position of the movable diaphragm clip close to the fixed bobbin.
[0015] In some examples of the present utility model, the first air hole is one of a circle and a polygon; and / or the second air hole is one of a circle and a polygon.
[0016] The battery cell winding device according to the present utility model includes: the bobbin structure described above.
[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be easily understood from the description of the embodiments in conjunction with the following drawings, wherein:
[0019] Figure 1 is a schematic structural diagram of a bobbin structure according to an embodiment of the present utility model;
[0020] Figure 2 is a cross-sectional view of a bobbin structure according to an embodiment of the present utility model.
[0021] Reference numerals:
[0022] 100, bobbin structure;
[0023] 10, fixed bobbin; 11, first film clamping surface; 12, first air hole; 13, fixed bobbin body; 14, fixed diaphragm clip; 15, first air path; 16, first main air path; 17, first branch air path;
[0024] 20. Movable winding needle; 21. Second film clamping surface; 22. Second air hole; 23. Movable winding needle body; 24. Movable diaphragm clamp; 25. Second air passage; 26. Second main air passage; 27. Second branch air passage; Detailed implementation manners
[0025] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.
[0026] Reference will be made below to Figure 1 and Figure 2 describe the winding needle structure according to the embodiments of the present invention.
[0027] As Figure 1 and Figure 2 shown, the winding needle structure 100 according to the present invention includes a fixed winding needle 10 and a movable winding needle 20. The fixed winding needle 10 has a first film clamping surface 11, and a first air hole 12 is provided on the first film clamping surface 11. The movable winding needle 20 is movable relative to the fixed winding needle 10. The movable winding needle 20 has a second film clamping surface 21. The first film clamping surface 11 and the second film clamping surface 21 are arranged opposite to each other and are used for jointly clamping the diaphragm. A second air hole 22 is provided on the second film clamping surface 21. One of the first air hole 12 and the second air hole 22 is an air suction hole and the other is a blowing hole.
[0028] It can be understood that the fixed winding needle 10 and the movable winding needle 20 form the main body of the winding needle structure 100. The fixed winding needle 10 and the movable winding needle 20 are arranged adjacent to each other. The fixed winding needle 10 can position the winding needle structure 100. The movable winding needle 20 moves relative to the fixed winding needle 10, so that air can be inhaled or blown in the winding needle structure 100. A first film clamping surface 11 is arranged on the side of the fixed winding needle 10 close to the movable winding needle 20, and a second film clamping surface 21 is arranged on the side of the movable winding needle 20 close to the fixed winding needle 10, so that the first film clamping surface 11 and the second film clamping surface 21 can be arranged opposite to each other. Both the first film clamping surface 11 and the second film clamping surface 21 can clamp the diaphragm, so that the fixed winding needle 10 and the movable winding needle 20 can position the diaphragm. A first air hole 12 is arranged on the first film clamping surface 11, and a second air hole 22 is arranged on the second film clamping surface 21. The first air hole 12 and the second air hole 22 are arranged opposite to each other. When the movable winding needle 20 moves relative to the fixed winding needle 10, the first air hole 12 and the second air hole 22 are misaligned, which is convenient for the diaphragm to move by the limitation of the first air hole 12 and the second air hole 22. Moreover, one of the first air hole 12 and the second air hole 22 is an air suction hole, and the other is a blowing hole. When the first air hole 12 is an air suction hole, the second air hole 22 is a blowing hole. When the first air hole 12 is a blowing hole, the second air hole 22 is an air suction hole. Such a setting can make the air flow eliminate the static electricity between the diaphragm and the fixed winding needle 10 through the first air hole 12 and the second air hole 22, so that the diaphragm can be separated from the fixed winding needle 10, and the problem of poor core pulling can be improved.
[0029] Therefore, by arranging an air suction hole and a blowing hole on the fixed winding needle 10 and the movable winding needle 20, the diaphragm can be blown open by the air flow. The ion wind blown out of the blowing holes on the fixed winding needle 10 and the movable winding needle 20 eliminates the static electricity between the diaphragm and the fixed winding needle 10 and the movable winding needle 20, so that the diaphragm can be prevented from adsorbing the fixed winding needle 10 and the movable winding needle 20, and the diaphragm can be smoothly separated from the fixed winding needle 10 and the movable winding needle 20, and the problem of poor core pulling can be improved.
[0030] Among them, as Figure 2As shown, there are multiple first air holes 12, and the multiple first air holes 12 are arranged at intervals in the length direction of the first film clamping surface 11; there are multiple second air holes 22, and the multiple second air holes 22 are arranged at intervals in the length direction of the second film clamping surface 21. That is to say, the first film clamping surface 11 extends along the length direction of the fixed winding needle 10, the second film clamping surface 21 extends along the length direction of the movable winding needle 20, and the fixed winding needle 10 and the movable winding needle 20 are arranged parallel to each other in the length direction, so that the first film clamping surface 11 and the second film clamping surface 21 can be arranged opposite to each other, and then it is convenient to clamp the diaphragm between the first film clamping surface 11 and the second film clamping surface 21. The multiple first air holes 12 are evenly opened at intervals along the length direction of the first film clamping surface 11, the multiple second air holes 22 are evenly opened at intervals along the length direction of the second film clamping surface 21, and the multiple first air holes 12 and the multiple second air holes 22 are in one-to-one correspondence, so that when the movable winding needle 20 moves relative to the fixed winding needle 10, the first air holes 12 and the second air holes 22 are misaligned, and then it is convenient for the gas to limit the movement of the diaphragm through the first air holes 12 and the second air holes 22.
[0031] In particular, as Figure 2 shown, the multiple first air holes 12 and the multiple second air holes 22 are in one-to-one correspondence, and the central axes of the corresponding first air holes 12 and second air holes 22 are collinear. It can be understood that the multiple first air holes 12 and the multiple second air holes 22 are in one-to-one correspondence, so that when the movable winding needle 20 moves relative to the fixed winding needle 10, the first air holes 12 and the second air holes 22 are misaligned, and then it is convenient for the gas to limit the movement of the diaphragm through the first air holes 12 and the second air holes 22. It can also increase the gas flow rate of the air blowing holes and the air suction holes, so as to avoid the diaphragm from adsorbing the fixed winding needle 10 and the movable winding needle 20, and can also make the diaphragm smoothly separate from the fixed winding needle 10 and the movable winding needle 20, and then can improve the problem of poor core pulling.
[0032] In addition, as Figure 2 shown, the fixed winding needle 10 includes: a fixed winding needle body 13 and a fixed diaphragm clamp 14. The fixed winding needle body 13 forms a first air path 15. The fixed diaphragm clamp 14 is arranged on the fixed winding needle body 13. The first film clamping surface 11 is arranged on the fixed diaphragm clamp 14, and the first air hole 12 is communicated with the first air path 15; the movable winding needle 20 includes: a movable winding needle body 23 and a movable diaphragm clamp 24. The movable winding needle body 23 forms a second air path 25. The movable diaphragm clamp 24 is arranged on the movable winding needle body 23. The second film clamping surface 21 is arranged on the movable diaphragm clamp 24, and the second air hole 22 is communicated with the second air path 25.
[0033] That is to say, the fixed bobbin body 13 and the fixed diaphragm clip 14 form the main structure of the fixed bobbin 10. A first air passage 15 is provided inside the fixed bobbin body 13, so that air flow can pass through the first air passage 15. The fixed diaphragm clip 14 is located on the fixed bobbin body 13, so that the fixed diaphragm clip 14 can fix the diaphragm. Moreover, a first film clamping surface 11 is arranged on the fixed diaphragm clip 14 in the direction close to the movable bobbin 20, so that the first air holes 12 on the first film clamping surface 11 are communicated with the first air passage 15, and then gas can flow into the first air passage 15 through the first air holes 12. A second air passage 25 is provided inside the movable bobbin body 23, so that air flow can pass through the second air passage 25. The movable diaphragm clip 24 is located on the movable bobbin body 23, so that the movable diaphragm clip 24 can fix the diaphragm. Moreover, a second film clamping surface 21 is arranged on the movable diaphragm clip 24 in the direction close to the fixed bobbin 10, so that the second air holes 22 on the second film clamping surface 21 are communicated with the second air passage 25, and then gas can flow into the second air passage 25 through the second air holes 22. Such an arrangement can use the air flow to blow open the diaphragm, and the ionic wind blown out from the air blowing holes on the fixed bobbin 10 and the movable bobbin 20 eliminates the static electricity between the diaphragm and the fixed bobbin 10 and the movable bobbin 20, so as to avoid the diaphragm adsorbing the fixed bobbin 10 and the movable bobbin 20, and can also make the diaphragm smoothly separate from the fixed bobbin 10 and the movable bobbin 20, and further improve the problem of poor core pulling.
[0034] Among them, as Figure 2 shown, the first air passage 15 includes: a first main air passage 16 and a first branch air passage 17. The first main air passage 16 extends along the length direction of the fixed bobbin body 13. One end of the first main air passage 16 is provided with a first air port connected to the first air pressure device. The first branch air passage 17 is perpendicular to the first main air passage 16, and the first branch air passage 17 is respectively communicated with the first main air passage 16 and the first air holes 12; the second air passage 25 includes: a second main air passage 26 and a second branch air passage 27. The second main air passage 26 extends along the length direction of the movable bobbin body 23. One end of the second main air passage 26 is provided with a second air port connected to the second air pressure device. The second branch air passage 27 is perpendicular to the second main air passage 26, and the second branch air passage 27 is respectively communicated with the second main air passage 26 and the second air holes 22.
[0035] It can be understood that the first main air passage 16 and the first branch air passage 17 constitute the main body of the first air passage 15. The first main air passage 16 extends along the length direction of the fixed coiling needle body 13, so that the first main air passage 16 can penetrate through the fixed coiling needle body 13. Further, the air flow can penetrate through the fixed coiling needle body 13 in the first main air passage 16. A first air port is arranged at one end of the first main air passage 16, and the first air port is connected with the first air pressure device, so that the first air pressure device can be communicated with the first main air passage 16. Further, the first air pressure device can control the air flow direction in the first main air passage 16. The first branch air passage 17 is arranged perpendicular to the first main air passage 16, and the first branch air passage 17 is evenly arranged at intervals along the length direction of the fixed coiling needle 10 body, so that the layout space of the first air passage 15 can be saved, and the air flow can also flow in the first main air passage 16 and the first branch air passage 17. One end of the first branch air passage 17 is communicated with the first main air passage 16, and a first air port is arranged at the other end, so that the air flow can pass through the first air port, the first branch air passage 17, the first main air passage 16 and the first air pressure device, and further, it is convenient for the first air pressure device to control the air flow direction. The second main air passage 26 extends along the length direction of the movable coiling needle body 23, so that the second main air passage 26 can penetrate through the movable coiling needle body 23. Further, the air flow can penetrate through the movable coiling needle body 23 in the second main air passage 26. A second air port is arranged at one end of the second main air passage 26, and the second air port is connected with the second air pressure device, so that the second air pressure device can be communicated with the second main air passage 26. Further, the second air pressure device can control the air flow direction in the second main air passage 26. The second branch air passage 27 is arranged perpendicular to the second main air passage 26, and the second branch air passage 27 is evenly arranged at intervals along the length direction of the movable coiling needle 20 body, so that the layout space of the second air passage 25 can be saved, and the air flow can also flow in the second main air passage 26 and the second branch air passage 27. One end of the second branch air passage 27 is communicated with the second main air passage 26, and a second air port is arranged at the other end, so that the air flow can pass through the second air port, the second branch air passage 27, the second main air passage 26 and the second air pressure device, and further, it is convenient for the second air pressure device to control the air flow direction.
[0036] In addition, as Figure 2As shown in the figure, the fixed winding needle 10 further includes: a fixed joint, which is connected between the first air passage 15 and the first air hole 12, and the fixed joint is elastically deformable; the movable winding needle 20 further includes: a movable joint, which is connected between the first air passage 15 and the first air hole 12, and the movable joint is elastically deformable. That is to say, a fixed joint is provided between the first air passage 15 and the first air hole 12, so that the fixed joint can control the on-off between the first air passage 15 and the first air hole 12. Thus, the first air passage 15 and the first air hole 12 can be connected when the air flow passes through, and closed when the air flow does not pass through. Moreover, the fixed joint has the ability of elastic deformation, which is convenient for the fixed joint to control the on-off between the first air passage 15 and the first air hole 12. Similarly, a movable joint is provided between the first air passage 15 and the first air hole 12, so that the movable joint can control the on-off between the first air passage 15 and the first air hole 12. Thus, the first air passage 15 and the first air hole 12 can be connected when the air flow passes through, and closed when the air flow does not pass through. Moreover, the movable joint has the ability of elastic deformation, which is convenient for the movable joint to control the on-off between the first air passage 15 and the first air hole 12. For example, the fixed joint and the movable joint are made of rubber material, which is convenient for the fixed joint and the movable joint to control the on-off between the first air passage 15 and the first air hole 12 respectively, and is also convenient for installing the fixed joint and the movable joint, thereby saving costs.
[0037] In addition, as Figure 2 shown, the fixed winding needle body 13 is provided with a first clamping portion, the fixed diaphragm clamp 14 is provided with a second clamping portion, and the first clamping portion and the second clamping portion are clamped and matched to allow the fixed diaphragm clamp 14 to move in the direction close to and away from the movable winding needle 20; the movable winding needle body 23 is provided with a third clamping portion, the movable diaphragm clamp 24 is provided with a fourth clamping portion, and the third clamping portion and the fourth clamping portion are clamped and matched to allow the movable diaphragm clamp 24 to move in the direction close to and away from the fixed winding needle 10.
[0038] It can be understood that a first clamping portion is provided on one side of the fixed bobbin body 13, and a second clamping portion is provided on one side of the fixed diaphragm clamp 14. The first clamping portion and the second clamping portion are arranged adjacent to each other, so as to facilitate the clamping cooperation between the first clamping portion and the second clamping portion, and further facilitate the connection between the fixed bobbin body 13 and the fixed diaphragm clamp 14. Moreover, the fixed diaphragm clamp 14 can move relative to the movable bobbin 20, so that the fixed bobbin body 13 and the movable bobbin 20 can move relative to each other, thus facilitating the fixed bobbin body 13 to approach or move away from the movable bobbin body 23. Furthermore, the ion wind blown out from the air holes on the fixed bobbin 10 and the movable bobbin 20 can eliminate the static electricity between the diaphragm and the fixed bobbin 10 and the movable bobbin 20. A third clamping portion is provided on one side of the movable bobbin body 23, and a fourth clamping portion is provided on one side of the movable diaphragm clamp 24. The third clamping portion and the fourth clamping portion are arranged adjacent to each other, so as to facilitate the clamping cooperation between the third clamping portion and the fourth clamping portion, and further facilitate the connection between the movable bobbin body 23 and the movable diaphragm clamp 24. Moreover, the movable diaphragm clamp 24 can move relative to the fixed bobbin 10, so that the movable bobbin body 23 and the fixed bobbin 10 can move relative to each other, thus facilitating the movable bobbin body 23 to approach or move away from the fixed bobbin body 13. Furthermore, the ion wind blown out from the air holes on the fixed bobbin 10 and the movable bobbin 20 can eliminate the static electricity between the diaphragm and the fixed bobbin 10 and the movable bobbin 20.
[0039] In addition, a first fastener is provided between the fixed bobbin body 13 and the fixed diaphragm clamp 14, and the first fastener limits the extreme position of the fixed diaphragm clamp 14 approaching the movable bobbin 20; a second fastener is provided between the movable bobbin body 23 and the movable diaphragm clamp 24, and the second fastener limits the extreme position of the movable diaphragm clamp 24 approaching the fixed bobbin 10.
[0040] That is to say, a first fastener is provided between the fixed bobbin body 13 and the fixed diaphragm clamp 14, so that the first fastener can limit the fixed bobbin body 13 and the fixed diaphragm clamp 14, thus facilitating the installation and disassembly between the fixed bobbin body 13 and the fixed diaphragm clamp 14, and can also increase the clamping force between the fixed bobbin body 13 and the fixed diaphragm clamp 14. A second fastener is provided between the movable bobbin body 23 and the movable diaphragm clamp 24, so that the second fastener can limit the movable bobbin body 23 and the movable diaphragm clamp 24, thus facilitating the installation and disassembly between the movable bobbin body 23 and the movable diaphragm clamp 24, and can also increase the clamping force between the movable bobbin body 23 and the movable diaphragm clamp 24. Furthermore, it is convenient for the ion wind blown out from the air holes on the fixed bobbin 10 and the movable bobbin 20 to eliminate the static electricity between the diaphragm and the fixed bobbin 10 and the movable bobbin 20.
[0041] Optionally, as Figure 2As shown, the first air hole 12 is one of a circle and a polygon; the second air hole 22 is one of a circle and a polygon. The first air hole 12 and the second air hole 22 can be circular or polygonal. Such a setting can ensure the gas flow rate through the first air hole 12 and the second air hole 22, thereby avoiding the diaphragm from adsorbing and fixing the fixed winding pin 10 and the movable winding pin 20, and can also enable the diaphragm to smoothly disengage from the fixed winding pin 10 and the movable winding pin 20, and further can improve the problem of poor core pulling.
[0042] Specifically, after the fixed winding pin 10 and the movable winding pin 20 wind the battery core, during the process of the unloading clamp clamping the battery core, the winding pin structure 100 has two working modes. The first one: The second air pressure device applies positive ion wind to the second main air path 26, and the positive ion wind blows towards the diaphragm through the second branch air path 27. At the same time, the first air pressure device applies negative ion wind to the first main air path 16, and the negative ion wind sucks the diaphragm over through the first branch air path 17, so that the diaphragm can move in one direction, and further the diaphragm can be flattened. The second one: The first air pressure device applies positive ion wind to the first main air path 16, and the positive ion wind blows towards the diaphragm through the first branch air path 17. At the same time, the second air pressure device applies negative ion wind to the second main air path 26, and the negative ion wind sucks the diaphragm over through the second branch air path 27, so that the diaphragm can move in one direction, and further the diaphragm can be flattened. Such a setting can avoid the diaphragm from adsorbing the fixed winding pin 10 and the movable winding pin 20, and can also enable the diaphragm to smoothly disengage from the fixed winding pin 10 and the movable winding pin 20, and further can improve the problem of poor core pulling, and can also improve the thickness consistency of the battery core.
[0043] According to the battery core winding device of the present invention, it includes: the winding pin structure of the above embodiment. By providing air suction holes and air blowing holes on the fixed winding pin 10 and the movable winding pin 20, such a setting can use the air flow to blow open the diaphragm, and the ion wind blown out from the air blowing holes on the fixed winding pin 10 and the movable winding pin 20 eliminates the static electricity between the diaphragm and the fixed winding pin 10 and the movable winding pin 20, thereby avoiding the diaphragm from adsorbing the fixed winding pin 10 and the movable winding pin 20, and can also enable the diaphragm to smoothly disengage from the fixed winding pin 10 and the movable winding pin 20, and further can improve the problem of poor core pulling.
[0044] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by 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. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 should not be construed as a limitation to the present invention.
[0045] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more. In the description of the present utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. In the description of the present utility model, the first feature being "above", "upward" and "on the top" of the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.
[0046] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.
[0047] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.
Claims
1. A coiling needle structure, characterized in that, Comprising: A fixed winding needle (10), the fixed winding needle (10) having a first film clamping surface (11), and a first air hole (12) provided on the first film clamping surface (11); A movable winding needle (20), the movable winding needle (20) being movable relative to the fixed winding needle (10), the movable winding needle (20) having a second film clamping surface (21), the first film clamping surface (11) and the second film clamping surface (21) being oppositely arranged and adapted to jointly clamp a separator, a second air hole (22) being provided on the second film clamping surface (21), and one of the first air hole (12) and the second air hole (22) being an air suction hole and the other being an air blowing hole.
2. The coiling needle structure according to claim 1, wherein, The first air holes (12) are multiple, and the multiple first air holes (12) are spaced apart in the length direction of the first film clamping surface (11); The second air holes (22) are multiple, and the multiple second air holes (22) are spaced apart in the length direction of the second film clamping surface (21).
3. The coiling needle structure according to claim 2, wherein, The multiple first air holes (12) and the multiple second air holes (22) correspond one by one, and the central axes of the corresponding first air hole (12) and the second air hole (22) are collinear.
4. The coiling needle structure according to claim 1, wherein The fixed winding needle (10) includes: A fixed winding needle body (13), the fixed winding needle body (13) forming a first air passage (15); A fixed separator clamp (14), the fixed separator clamp (14) being provided on the fixed winding needle body (13), the first film clamping surface (11) being provided on the fixed separator clamp (14), and the first air hole (12) communicating with the first air passage (15); The movable winding needle (20) includes: A movable winding needle body (23), the movable winding needle body (23) forming a second air passage (25); A movable separator clamp (24), the movable separator clamp (24) being provided on the movable winding needle body (23), the second film clamping surface (21) being provided on the movable separator clamp (24), and the second air hole (22) communicating with the second air passage (25).
5. The coiling needle structure according to claim 4, wherein The first air passage (15) includes: A first main air passage (16), the first main air passage (16) extending along the length direction of the fixed winding needle body (13), and a first air port connected to a first air pressure device being provided at one end of the first main air passage (16); A first branch air passage (17), the first branch air passage (17) being perpendicular to the first main air passage (16), and the first branch air passage (17) communicating with the first main air passage (16) and the first air hole (12) respectively; and / or The second air passage (25) includes: A second main air passage (26), the second main air passage (26) extending along the length direction of the movable winding needle body (23), and a second air port connected to a second air pressure device being provided at one end of the second main air passage (26); A second branch air passage (27), the second branch air passage (27) being perpendicular to the second main air passage (26), and the second branch air passage (27) communicating with the second main air passage (26) and the second air hole (22) respectively.
6. The coiling needle structure according to claim 4, wherein The fixed winding needle (10) further includes: A fixed joint, which is connected between the first gas path (15) and the first air hole (12), and the fixed joint is elastically deformable; and / or The movable winding needle (20) further includes: A movable joint, which is connected between the first gas path (15) and the first air hole (12), and the movable joint is elastically deformable.
7. The coiling needle structure according to claim 4, wherein, The fixed winding needle body (13) is provided with a first clamping portion, the fixed diaphragm clip (14) is provided with a second clamping portion, the first clamping portion and the second clamping portion are clamped and matched and allow the fixed diaphragm clip (14) to move in the direction close to and away from the movable winding needle (20); and / or The movable winding needle body (23) is provided with a third clamping portion, the movable diaphragm clip (24) is provided with a fourth clamping portion, the third clamping portion and the fourth clamping portion are clamped and matched and allow the movable diaphragm clip (24) to move in the direction close to and away from the fixed winding needle (10).
8. The winding needle structure according to claim 4, wherein A first fastener is arranged between the fixed winding needle body (13) and the fixed diaphragm clip (14), and the first fastener limits the extreme position of the fixed diaphragm clip (14) close to the movable winding needle (20); and / or A second fastener is arranged between the movable winding needle body (23) and the movable diaphragm clip (24), and the second fastener limits the extreme position of the movable diaphragm clip (24) close to the fixed winding needle (10).
9. The coiling needle structure according to claim 1, characterized in that, The first air hole (12) is one of a circle and a polygon; and / or The second air hole (22) is one of a circle and a polygon.
10. A battery cell winding device, characterized in that, Comprising: The winding needle structure (100) according to any one of claims 1-9.