Winding device and winding system
By using two winding needle assemblies and setting a limiting structure in the winding device, they rotate synchronously and in the same direction, and offset the frictional force when withdrawing, thus solving the problem of poor core pulling of the winding needle and achieving high-quality winding and structural stability.
Patent Information
- Application Number
- CN202423265589.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In the prior art, when the winding needle is pulled out of the battery cell, it is easy to pull out the electrode sheet or diaphragm, resulting in poor core pulling.
Two needle winding assemblies are used, namely the first needle winding assembly and the second needle winding assembly. By setting a limiting structure, they are made to rotate synchronously and in the same direction along the rotation axis. When they are pulled out, the friction forces are opposite, which cancels out the friction force and prevents the core pulling failure.
It effectively prevents the winding needle from pulling out the inner ring of the battery cell electrode or diaphragm during core pulling, ensuring winding quality and reducing the axial length of the winding needle assembly, thereby improving structural stability.
Smart Images
Figure CN223911665U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a winding technology field especially a winding device and winding system. BACKGROUND
[0002] Winding, as a high-efficiency base material forming method, has been widely used in the preparation of base materials, which mainly realizes winding of the base material (including pole piece and diaphragm) through winding needle to form a winding type battery.
[0003] In the related art, when winding, the base material is wound on the outside of the winding needle around the axis of the winding needle; after completing the winding of the base material, the winding needle is extracted from the head or tail of the battery along the axis in one direction, and since there is relative movement between the winding needle and the battery, the winding needle and the inner part of the battery will produce friction, which causes the winding needle to easily take out the pole piece or diaphragm of the inner part of the battery when extracting the core, resulting in poor core extraction. SUMMARY
[0004] The utility model aims at at least solving one of the technical problems existing in the prior art. For this purpose, the utility model provides a winding device and winding system, which can prevent the winding needle from being extracted from the battery and causing poor core extraction.
[0005] The winding device according to the first aspect of the utility model can prevent the winding needle from being extracted from the battery and causing poor core extraction.
[0006] The first winding needle assembly and the second winding needle assembly are configured to move towards each other along the rotation axis, and the first limiting structure and the second limiting structure are matched to make the first winding needle assembly and the second winding needle assembly rotate synchronously and in the same direction around the rotation axis, and to move away from each other along the rotation axis, and the first limiting structure and the second limiting structure are separated.
[0007] The winding device according to the utility model embodiment has at least the following beneficial effects:
[0008] By setting the opposite first winding needle assembly and the second winding needle assembly along the rotation axis, and the first winding needle assembly and the second winding needle assembly are configured to be capable of moving towards or away from each other along the rotation axis. When the first winding needle assembly and the second winding needle assembly move towards each other to the first limiting structure and the second limiting structure cooperate, the first limiting structure and the second limiting structure can fix the first winding needle assembly and the second winding needle assembly relative to each other in the circumference to limit the first winding needle assembly and the second winding needle assembly relative to each other rotating around the rotation axis, so that the first winding needle assembly and the second winding needle assembly can rotate synchronously and in the same direction around the rotation axis, in this way, the first winding needle assembly and the second winding needle assembly can jointly wind the base material to form the battery cell; after winding is completed, the first winding needle assembly and the second winding needle assembly can be separated from the battery cell in the opposite direction along the rotation axis, and during the separation process, the frictional force of the first winding needle assembly and the inner ring of the battery cell and the frictional force of the second winding needle assembly and the inner ring of the battery cell are opposite, so that the frictional force of the first winding needle assembly and the second winding needle assembly and the inner ring of the battery cell can be offset, thereby avoiding that the winding needle takes out the pole piece or the diaphragm of the inner ring of the battery cell when taking out the battery cell, and preventing the winding needle from being taken out from the battery cell.
[0009] According to some embodiments of the present application, the first limiting structure is arranged on the opposite end face of the first winding needle assembly and the second winding needle assembly, and the second limiting structure is arranged on the opposite end face of the second winding needle assembly and the first winding needle assembly.
[0010] According to some embodiments of the present application, one of the first limiting structure and the second limiting structure is a groove, and the other of the first limiting structure and the second limiting structure is a protrusion, and the protrusion is matched with the groove.
[0011] According to some embodiments of the present application, when the first limiting structure and the second limiting structure cooperate, the opposite end face of the first winding needle assembly and the second winding needle assembly and the opposite end face of the second winding needle assembly and the first winding needle assembly are attached.
[0012] According to some embodiments of the present application, the first winding needle assembly comprises a first clamping mechanism and a first outer winding needle, the first outer winding needle is arranged on the circumferential outer side of the first clamping mechanism, and the first clamping mechanism is used for clamping the base material.
[0013] The second winding needle assembly comprises a second clamping mechanism and a second outer winding needle, the second outer winding needle is arranged on the circumferential outer side of the second clamping mechanism, and the second clamping mechanism is used for clamping the base material.
[0014] According to some embodiments of the present application, the first clamping mechanism comprises at least two first inner winding needles, the at least two first inner winding needles are arranged at intervals around the rotation axis, and the at least two first inner winding needles are used for clamping the base material.
[0015] The second clamping mechanism comprises at least two second inner winding needles, the at least two second inner winding needles are arranged at intervals around the rotation axis, and the at least two second inner winding needles are used for clamping the base material, wherein one first inner winding needle corresponds to one second inner winding needle.
[0016] According to some embodiments of the present application, the first outer winding needle and the first inner winding needle are both provided with first limiting structures, the second outer winding needle and the second inner winding needle are both provided with second limiting structures, the first limiting structure on the first outer winding needle is matched with the second limiting structure on the second outer winding needle, and the first limiting structure on the first inner winding needle is matched with the second limiting structure on the second inner winding needle.
[0017] According to some embodiments of the present application, the winding device further comprises a first driving member and a second driving member, the first driving member is connected with the first winding needle assembly, the second driving member is connected with the second winding needle assembly, the first driving member is used for driving the first winding needle assembly to move towards or away from the second winding needle assembly along the rotation axis, and the second driving member is used for driving the second winding needle assembly to move towards or away from the first winding needle assembly along the rotation axis.
[0018] According to some embodiments of the present application, the winding device further comprises a third driving member, the third driving member is connected with one of the first winding needle assembly and the second winding needle assembly, and the third driving member is used for driving one of the first winding needle assembly and the second winding needle assembly to rotate around the rotation axis.
[0019] According to the winding system of the second aspect embodiment of the present application, the winding system comprises a winding-off device and the winding device as described above, the winding-off device is used for conveying the base material to the winding station, and the first winding needle assembly and the second winding needle assembly are used for moving towards each other to the winding station and winding the base material around the rotation axis.
[0020] The winding system of the present application has the beneficial effects of the winding device, which will not be described here.
[0021] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be understood by those skilled in the art through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0022] The present application will be further described below in combination with the drawings and embodiments, wherein:
[0023] Figure 1 A structure schematic view of the winding device provided for one embodiment of the present application is shown in the figure;
[0024] Figure 2 For Figure 1 An enlarged view of A part of the winding device shown in the figure;
[0025] Figure 3 ForFigure 1 Structure schematic view of the first winding needle assembly and the second winding needle assembly of the winding device shown in cooperation.
[0026] Reference signs:
[0027] Winding device 100;
[0028] First winding needle assembly 10;First limiting structure 101;First clamping mechanism 11;First inner winding needle 111;First outer winding needle 12;First connecting seat 13;
[0029] Second winding needle assembly 20;Second limiting structure 201;Second clamping mechanism 21;Second inner winding needle 211;Second outer winding needle 22;Second connecting seat 23;
[0030] First driving member 30;
[0031] Second driving member 40;
[0032] Third driving member 50. DETAILED DESCRIPTION
[0033] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.
[0034] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.
[0035] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.
[0036] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.
[0037] In the description of the present utility model, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present utility model. In the present specification, the illustrative description 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 any one or more embodiments or examples in a suitable manner.
[0038] Please refer to Figure 1 and Figure 2 The utility model embodiment provides a winding device 100, winding device 100 is used for winding the base material around rotation axis O, to make the base material winding form the electric core. Wherein, the base material includes the positive pole piece, negative pole piece and diaphragm of laminated arrangement.
[0039] Winding device 100 includes first winding needle assembly 10 and second winding needle assembly 20. First winding needle assembly 10 and second winding needle assembly 20 are oppositely arranged along rotation axis O, first winding needle assembly 10 is provided with first limiting structure 101, and second winding needle assembly 20 is provided with second limiting structure 201;First winding needle assembly 10 and second winding needle assembly 20 are configured to be capable of moving towards each other along rotation axis O, and make first limiting structure 101 and second limiting structure 201 cooperate, to make first winding needle assembly 10 and second winding needle assembly 20 rotate around rotation axis O synchronously and in the same direction, and be capable of moving away from each other along rotation axis O, and make first limiting structure 101 and second limiting structure 201 separate.
[0040] In the embodiment of the utility model, through setting opposite first winding needle assembly 10 and second winding needle assembly 20 along rotation axis O, and first winding needle assembly 10 and second winding needle assembly 20 are configured to be able to move towards or away from each other along rotation axis O. When first winding needle assembly 10 and second winding needle assembly 20 move towards each other to first limiting structure 101 and second limiting structure 201 cooperate, first limiting structure 101 and second limiting structure 201 can make first winding needle assembly 10 and second winding needle assembly 20 relative to each other circumferentially fixed, to limit first winding needle assembly 10 and second winding needle assembly 20 relative to each other rotate around rotation axis O, so that first winding needle assembly 10 and second winding needle assembly 20 can rotate synchronously and in the same direction around rotation axis O, in this way, first winding needle assembly 10 and second winding needle assembly 20 can jointly wind the base material to form the electric core, after winding, first winding needle assembly 10 and second winding needle assembly 20 can be separated from the electric core along rotation axis O in opposite directions synchronously, during the separation process, the frictional force of first winding needle assembly 10 and the inner ring of the electric core and the frictional force of second winding needle assembly 20 and the inner ring of the electric core are opposite, in this way, the frictional force of first winding needle assembly 10 and second winding needle assembly 20 and the inner ring of the electric core can be offset, so that the pole piece or diaphragm of the inner ring of the electric core is avoided to be taken out by winding needle when taking out the electric core, and the situation of taking out the electric core is avoided when winding needle is taken out from the electric core.
[0041] In addition, compared with the existing winding method of using a single winding needle assembly to wind the base material, the winding device 100 of the embodiment of the utility model is provided with two winding needle assemblies (i.e., first winding needle assembly 10 and second winding needle assembly 20), so that the axial length of the winding needle assembly can be effectively reduced, and the bending deformation caused by the excessive axial length of the winding needle assembly can be avoided, which is beneficial to ensuring the structural stability of the winding needle assembly.
[0042] In some embodiments, the first limiting structure 101 is arranged on the end face opposite to the second winding needle assembly 20, and the second limiting structure 201 is arranged on the end face opposite to the first winding needle assembly 10. By arranging the limiting structure (first limiting structure 101, second limiting structure 201) on the end face of the winding needle assembly (first winding needle assembly 10, second winding needle assembly 20), the influence of the limiting structure on the winding of the base material on the circumferential outer side wall of the winding needle assembly can be avoided, so that the base material can be attached to the circumferential outer side wall of the winding needle assembly during winding, to ensure the winding quality.
[0043] In some embodiments, one of the first limiting structure 101 and the second limiting structure 201 is a groove, and the other of the first limiting structure 101 and the second limiting structure 201 is a protrusion, which is adapted to the groove. When the first winding needle assembly 10 and the second winding needle assembly 20 move towards each other along the rotation axis O, the protrusion can be inserted into the groove to fix the first winding needle assembly 10 and the second winding needle assembly 20 circumferentially relative to each other. By the insertion fit between the protrusion and the groove, the length along the rotation axis O when the protrusion and the groove are matched can be shortened, thereby reducing the distance between the end face of the first winding needle assembly 10 and the end face of the second winding needle assembly 20.
[0044] Specifically, the protrusion is arranged on the end face of the first winding needle assembly 10 opposite to the second winding needle assembly 20, and the protrusion protrudes from the end face of the first winding needle assembly 10 towards the second winding needle assembly 20; the groove is arranged on the end face of the second winding needle assembly 20 opposite to the first winding needle assembly 10, and the groove is recessed from the end face of the second winding needle assembly 20 away from the first winding needle assembly 10.
[0045] Of course, in other embodiments, the protrusion can also be arranged on the end face of the second winding needle assembly 20 opposite to the first winding needle assembly 10, and the groove can also be arranged on the end face of the first winding needle assembly 10 opposite to the second winding needle assembly 20, or the end face of the first winding needle assembly 10 is provided with the protrusion and the groove, and the end face of the second winding needle assembly 20 is also provided with the protrusion and the groove, the protrusion on the end face of the first winding needle assembly 10 is inserted into the groove on the end face of the second winding needle assembly 20, and the protrusion on the end face of the second winding needle assembly 20 is inserted into the groove on the end face of the first winding needle assembly 10.
[0046] In some embodiments, when the first limiting structure 101 and the second limiting structure 201 are matched, the end face of the first winding needle assembly 10 and the end face of the second winding needle assembly 20 are in contact, that is, the protrusion can be completely accommodated in the groove, the length along the rotation axis O when the protrusion and the groove are matched is maximally shortened, so as to avoid the gap between the end face of the first winding needle assembly 10 and the end face of the second winding needle assembly 20, thereby preventing the substrate from being recessed into the gap from the circumferential outer wall of the winding assembly during winding, so as to ensure the winding quality.
[0047] In some embodiments, the first winding needle assembly 10 comprises a first clamping mechanism 11 and a first outer winding needle 12, the first outer winding needle 12 is arranged on the circumferential outer side of the first clamping mechanism 11, and the first clamping mechanism 11 is used for clamping the base material; the second winding needle assembly 20 comprises a second clamping mechanism 21 and a second outer winding needle 22, the second outer winding needle 22 is arranged on the circumferential outer side of the second clamping mechanism 21, and the second clamping mechanism 21 is used for clamping the base material. When winding, the first clamping mechanism 11 and the second clamping mechanism 21 jointly clamp the leading end of the base material to fix the leading end of the base material, and when the first winding needle assembly 10 and the second winding needle assembly 20 rotate around the rotation axis O, the first outer winding needle 12 and the second outer winding needle 22 jointly wind the base material to make the base material wrap around the circumferential outer side wall of the first outer winding needle 12 and the second outer winding needle 22 around the rotation axis O, thereby realizing the winding of the base material.
[0048] In some embodiments, the first clamping mechanism 11 comprises at least two first inner winding needles 111, the at least two first inner winding needles 111 are arranged at intervals around the rotation axis O, and the at least two first inner winding needles 111 are used for clamping the base material; the second clamping mechanism 21 comprises at least two second inner winding needles 211, the at least two second inner winding needles 211 are arranged at intervals around the rotation axis O, and the at least two second inner winding needles 211 are used for clamping the base material, wherein one of the first inner winding needles 111 corresponds to one of the second inner winding needles 211.
[0049] Specifically, the first winding needle assembly 10 further comprises a first connecting seat 13, the first outer winding needle 12 and the first inner winding needle 111 are connected to the first connecting seat 13 respectively, and the first inner winding needle 111 can move relative to the first outer winding needle 12 in a direction perpendicular to the rotation axis O, so that the first inner winding needle 111 can clamp and fix the base material; the second winding needle assembly 20 further comprises a second connecting seat 23, the second outer winding needle 22 and the second inner winding needle 211 are connected to the second connecting seat 23 respectively, and the second inner winding needle 211 can move relative to the second outer winding needle 22 in a direction perpendicular to the rotation axis O, so that the second inner winding needle 211 can clamp and fix the base material.
[0050] Wherein, the first outer winding needle 12 and the second outer winding needle 22 are arranged opposite to each other in a direction parallel to the rotation axis O, the first inner winding needle 111 and the second inner winding needle 211 are arranged opposite to each other in a direction parallel to the rotation axis O, the first connecting seat 13 is located at one end of the first outer winding needle 12 away from the second outer winding needle 22, and the second connecting seat 23 is located at one end of the second outer winding needle 22 away from the first outer winding needle 12.
[0051] As shown in Figure 1 and Figure 2 The number of the second inner winding needles 211 can be two, and the two second inner winding needles 211 can clamp the base material from opposite sides of the base material in the thickness direction of the base material to fix the base material.
[0052] In some embodiments, the first outer winding needle 12 and the first inner winding needle 111 are both provided with first limiting structures 101, and the second outer winding needle 22 and the second inner winding needle 211 are both provided with second limiting structures 201. The first limiting structures 101 on the first outer winding needle 12 cooperate with the second limiting structures 201 on the second outer winding needle 22, so that the first outer winding needle 12 and the second outer winding needle 22 can be synchronously and identically rotated around the rotation axis O through cooperation of the first limiting structures 101 and the second limiting structures 201; the first limiting structures 101 on the first inner winding needle 111 cooperate with the second limiting structures 201 on the second inner winding needle 211, so that the first inner winding needle 111 and the second inner winding needle 211 can be synchronously and identically rotated around the rotation axis O through cooperation of the first limiting structures 101 and the second limiting structures 201, and when one of the first inner winding needle 111 and the second inner winding needle 211 performs a clamping action on the base material, the other one can also synchronously perform a clamping action on the base material through cooperation of the first limiting structures 101 and the second limiting structures 201.
[0053] In some embodiments, the winding device 100 further comprises a first driving member 30 and a second driving member 40, the first driving member 30 is connected with the first winding needle assembly 10, and the second driving member 40 is connected with the second winding needle assembly 20, the first driving member 30 is used to drive the first winding needle assembly 10 to move along the rotation axis O towards or away from the second winding needle assembly 20, and the second driving member 40 is used to drive the second winding needle assembly 20 to move along the rotation axis O towards or away from the first winding needle assembly 10, so that the first winding needle assembly 10 and the second winding needle assembly 20 can move towards or away from each other.
[0054] In some embodiments, the winding device 100 further comprises a third driving member 50, the third driving member 50 is connected with one of the first winding needle assembly 10 and the second winding needle assembly 20, and the third driving member 50 is used to drive one of the first winding needle assembly 10 and the second winding needle assembly 20 to rotate around the rotation axis O. When the first winding needle assembly 10 and the second winding needle assembly 20 move towards each other to the first limiting structures 101 and the second limiting structures 201 cooperate, since the first winding needle assembly 10 and the second winding needle assembly 20 are fixed circumferentially relative to each other, when the third driving member 50 drives one of the first winding needle assembly 10 and the second winding needle assembly 20 to rotate around the rotation axis O, the other one can be driven to synchronously and identically rotate, so that only one third driving member 50 can realize the rotation driving of the first winding needle assembly 10 and the second winding needle assembly 20, which simplifies the structure and reduces the cost.
[0055] Specifically, the first driving member 30 is connected with the first connecting seat 13, the second driving member 40 is connected with the second connecting seat 23, and the third driving member 50 is connected with the first driving member 30.
[0056] The utility model embodiment further provides a winding system, winding system includes unwinding device and winding device 100 as described above, unwinding device is used for conveying base material to winding station, first winding needle subassembly 10 and second winding needle subassembly 20 are used for moving to winding station towards each other and winding base material around rotation axis O, to make base material winding form electric core.
[0057] Wherein, before winding, first winding needle subassembly 10 and second winding needle subassembly 20 are in the state of far from each other, winding station is located between first winding needle subassembly 10 and second winding needle subassembly 20.
[0058] The utility model embodiment has been explained in detail above in connection with the drawings, but the utility model is not limited to the above-mentioned embodiment, within the knowledge scope possessed by ordinary skilled in the art, still can make various changes under the premise of not departing from the utility model's tenet.This in addition, in the case where there is no conflict, the embodiment of the utility model and the feature in the embodiment can be combined with each other.
Claims
1. A winding device for winding a base material around an axis of rotation, characterized in that The winding device comprises a first winding needle assembly and a second winding needle assembly, the first winding needle assembly and the second winding needle assembly are oppositely arranged along the rotation axis, the first winding needle assembly is provided with a first limiting structure, and the second winding needle assembly is provided with a second limiting structure; The first winding needle assembly and the second winding needle assembly are configured to move towards each other along the rotation axis and make the first limiting structure and the second limiting structure cooperate to rotate the first winding needle assembly and the second winding needle assembly synchronously and in the same direction around the rotation axis, and are configured to move away from each other along the rotation axis and make the first limiting structure and the second limiting structure separate.
2. The winding device according to claim 1, characterized in that The first limiting structure is arranged on an end face of the first winding needle assembly opposite to the second winding needle assembly, and the second limiting structure is arranged on an end face of the second winding needle assembly opposite to the first winding needle assembly.
3. The winding device according to claim 2, characterized in that One of the first limiting structure and the second limiting structure is a groove, and the other of the first limiting structure and the second limiting structure is a protrusion, the protrusion is matched with the groove.
4. The winding device according to claim 3, characterized in that When the first limiting structure and the second limiting structure cooperate, the end face of the first winding needle assembly opposite to the second winding needle assembly and the end face of the second winding needle assembly opposite to the first winding needle assembly are attached.
5. The winding device according to any one of claims 1 to 4, characterized in that The first winding needle assembly comprises a first clamping mechanism and a first outer winding needle, the first outer winding needle is arranged on the circumferential outer side of the first clamping mechanism, and the first clamping mechanism is used for clamping the base material; The second winding needle assembly comprises a second clamping mechanism and a second outer winding needle, the second outer winding needle is arranged on the circumferential outer side of the second clamping mechanism, and the second clamping mechanism is used for clamping the base material.
6. The winding device according to claim 5, characterized in that The first clamping mechanism comprises at least two first inner winding needles, the at least two first inner winding needles are arranged at intervals around the rotation axis, and the at least two first inner winding needles are used for clamping the base material; The second clamping mechanism comprises at least two second inner winding needles, the at least two second inner winding needles are arranged at intervals around the rotation axis, and the at least two second inner winding needles are used for clamping the base material, wherein one first inner winding needle corresponds to one second inner winding needle.
7. The winding device according to claim 6, characterized in that The first outer winding needle and the first inner winding needle are both provided with the first limiting structure, the second outer winding needle and the second inner winding needle are both provided with the second limiting structure, the first limiting structure on the first outer winding needle cooperates with the second limiting structure on the second outer winding needle, and the first limiting structure on the first inner winding needle cooperates with the second limiting structure on the second inner winding needle.
8. The winding device according to claim 1, characterized in that The winding device further comprises a first driving member and a second driving member, the first driving member is connected with the first winding needle assembly, the second driving member is connected with the second winding needle assembly, the first driving member is used for driving the first winding needle assembly to move towards or away from the second winding needle assembly along the rotation axis, and the second driving member is used for driving the second winding needle assembly to move towards or away from the first winding needle assembly along the rotation axis.
9. The winding device according to claim 1, characterized in that The winding device further comprises a third driving member connected with one of the first winding needle assembly and the second winding needle assembly, and the third driving member is used to drive one of the first winding needle assembly and the second winding needle assembly to rotate around the rotation axis.
10. A winding system, characterized by The winding device further comprises a third driving member connected with one of the first winding needle assembly and the second winding needle assembly, and the third driving member is used to drive one of the first winding needle assembly and the second winding needle assembly to rotate around the rotation axis.