Winding needle mechanism and battery winding machine

Abstract

The utility model relates to the technical field of battery production equipment, in particular to a winding needle mechanism and a battery winding machine. The first winding needle and the second winding needle of the winding needle mechanism are mounted on the winding needle seat in a swinging manner, and the distance between the first side edge and the second side edge is gradually reduced in the direction from the swinging mounting end of the first winding needle to the other end of the first winding needle, so that the winding needles can be conveniently pulled out after a battery cell is wound, and the winding needle can be further conveniently pulled out; the ratio of the two ends of the winding section to the swinging axis is not less than 0.3, so that the distance between the winding section and the swinging axis is large, the gap between one end, close to the winding needle seat, of the winding section and the battery cell is large, the winding needle can be drawn out more conveniently, and the problem of core pulling is not easy to occur in the process of drawing out the winding needle.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a winding needle mechanism and a battery winding machine. Background Art

[0002] The battery winding machine can wind the positive electrode sheet, negative electrode sheet and separator into a combined shape. The battery winding machine usually includes a winding needle mechanism, which is used to wind the separator and the electrode sheet. The winding needle mechanism includes a winding needle assembly and a winding needle seat. The winding needle assembly includes two winding needles. After the two winding needles have completed the winding for a specific number of turns, the winding needles can be pulled out of the battery cell. The current winding needle mechanism is difficult to pull out when the winding needle is pulled out, and it is easy to pull out the inner ring of the battery cell. Utility Model Content

[0003] The utility model provides a winding needle mechanism, which is used to improve the problem that the winding needle mechanism of the current battery winding machine is easy to pull out the core when being pulled out from the battery core.

[0004] In addition, the purpose of the present invention is to provide a battery winding machine using the above-mentioned winding needle mechanism.

[0005] In a first aspect, an embodiment provides a needle winding mechanism, comprising:

[0006] Needle coil holder;

[0007] and a needle winding assembly, the needle winding assembly comprising a first needle winding and a second needle winding; one end of the first needle winding and one end of the second needle winding are both swing mounting ends swingably mounted on the needle winding seat;

[0008] The winding needle assembly comprises a winding section and a spare section, the winding section is used for winding the battery cell and is covered by the battery cell, the spare section is between the winding section and the winding needle seat, the winding section has a first side edge and a second side edge arranged in the width direction, the first side edge is on the first winding needle, and the second side edge is on the second winding needle; at least when the winding needle assembly is pulled out of the battery cell, the distance between the first side edge and the second side edge gradually decreases from the swing installation end of the first winding needle to the other end;

[0009] The straight-line distance between the end of the winding section close to the winding needle seat and the swing axis of the first winding needle is a, and the straight-line distance between the end of the winding section away from the winding needle seat and the swing axis is b. The relationship between a and b satisfies: 0.3≤a / b≤1.

[0010] Furthermore, in one embodiment, the relationship between a and b satisfies: 0.47≤a / b≤0.6.

[0011] Furthermore, in one embodiment, the outer surface of the junction between the spare section and the winding section is flush.

[0012] Furthermore, in one embodiment, the two ends of the first winding needle are respectively a first end and a second end, the first end is a swing mounting end of the first winding needle, the two ends of the second winding needle are respectively a third end and a fourth end, the third end is a swing mounting end of the second winding needle, and the winding needle mechanism also includes a first elastic member, which is arranged on the winding needle seat, and is used to apply an elastic force to the first end and / or the third end to make the second end and the fourth end approach each other.

[0013] Furthermore, in one embodiment, the needle winding mechanism further includes a second elastic member, which is disposed on the needle winding seat and is used to apply an elastic force to the first end and / or the third end so as to move the second end and the fourth end away from each other.

[0014] Furthermore, in one embodiment, the number of the first elastic members is at least two, at least one of the first elastic members is used to apply elastic force to the first winding needle, and at least one of the first elastic members is used to apply elastic force to the second winding needle; the number of the second elastic members is at least two, at least one of the second elastic members is used to apply elastic force to the first winding needle, and at least one of the second elastic members is used to apply elastic force to the second winding needle; the first elastic member acting on the first winding needle and the second elastic member acting on the first winding needle are respectively located on both sides of the swing axis of the first winding needle in the length direction of the first winding needle.

[0015] Furthermore, in one embodiment, the first elastic member is a spring and / or the second elastic member is a spring.

[0016] Furthermore, in one embodiment, the swing axis of the first winding needle coincides with the swing axis of the second winding needle.

[0017] Furthermore, in one embodiment, the needle winding mechanism includes a needle mouth, the needle mouth has a needle winding groove, and one end of the first winding needle and one end of the second winding needle are both inserted into the needle winding groove.

[0018] In a second aspect, an embodiment provides a winding machine, including a winding needle mechanism and a cutting mechanism, wherein the winding needle mechanism includes:

[0019] Needle coil holder;

[0020] and a needle winding assembly, the needle winding assembly comprising a first needle winding and a second needle winding; one end of the first needle winding and one end of the second needle winding are both swing mounting ends swingably mounted on the needle winding seat;

[0021] The winding needle assembly comprises a winding section and a spare section, the winding section is used for winding the battery cell and is covered by the battery cell, the spare section is between the winding section and the winding needle seat, the winding section has a first side edge and a second side edge arranged in the width direction, the first side edge is on the first winding needle, the second side edge is on the second winding needle, and the distance between the first side edge and the second side edge gradually decreases from the swing installation end of the first winding needle to the other end;

[0022] The straight-line distance between the end of the winding section close to the winding needle seat and the swing axis of the first winding needle is a, and the straight-line distance between the end of the winding section away from the winding needle seat and the swing axis is b. The relationship between a and b satisfies: 0.3≤a / b≤1.

[0023] Furthermore, in one embodiment, the relationship between a and b satisfies: 0.47≤a / b≤0.6.

[0024] Furthermore, in one embodiment, the outer surface of the junction between the spare section and the winding section is flush.

[0025] Furthermore, in one embodiment, the two ends of the first winding needle are respectively a first end and a second end, the first end is a swing mounting end of the first winding needle, the two ends of the second winding needle are respectively a third end and a fourth end, the third end is a swing mounting end of the second winding needle, and the winding needle mechanism also includes a first elastic member, which is arranged on the winding needle seat, and is used to apply an elastic force to the first end and / or the third end to make the second end and the fourth end approach each other.

[0026] Furthermore, in one embodiment, the needle winding mechanism further includes a second elastic member, which is disposed on the needle winding seat and is used to apply an elastic force to the first end and / or the third end so as to move the second end and the fourth end away from each other.

[0027] Furthermore, in one embodiment, the number of the first elastic members is at least two, at least one of the first elastic members is used to apply elastic force to the first winding needle, and at least one of the first elastic members is used to apply elastic force to the second winding needle; the number of the second elastic members is at least two, at least one of the second elastic members is used to apply elastic force to the first winding needle, and at least one of the second elastic members is used to apply elastic force to the second winding needle; the first elastic member acting on the first winding needle and the second elastic member acting on the first winding needle are respectively located on both sides of the swing axis of the first winding needle in the length direction of the first winding needle.

[0028] Furthermore, in one embodiment, the first elastic member is a spring and / or the second elastic member is a spring.

[0029] Furthermore, in one embodiment, the swing axis of the first winding needle coincides with the swing axis of the second winding needle.

[0030] Furthermore, in one embodiment, the needle winding mechanism includes a needle mouth, the needle mouth has a needle winding groove, and one end of the first winding needle and one end of the second winding needle are both inserted into the needle winding groove.

[0031] According to the winding needle mechanism of the above embodiment, the first winding needle and the second winding needle of the winding needle mechanism in the present application are swingably installed on the winding needle seat, and the distance between the first side edge and the second side edge gradually decreases in the direction from the swinging installation end of the first winding needle to the other end, so that it is convenient to pull out the winding needle after the battery cell is wound. In order to further facilitate the pulling out of the winding needle, the ratio between the two ends of the winding section and the swing axis is not less than 0.3, so that the distance between the winding section and the swing axis is large, and the gap between the end of the winding section close to the winding needle seat and the battery cell is large, which makes it easier to pull out the winding needle. In the process of pulling out the winding needle, the problem of core pulling is not easy to occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural schematic diagram of a needle winding mechanism in an embodiment;

[0033] Figure 2 for Figure 1 Left view of

[0034] Figure 3 A schematic diagram of a needle winding mechanism in one embodiment;

[0035] Figure 4 It is a structural schematic diagram of a needle winding seat in an embodiment.

[0036] List of feature names corresponding to the figure marks in the figure: 1. Winding needle seat; 11. Winding needle mounting hole; 12. Elastic member hole; 2. Winding needle assembly; 21. First winding needle; 211. First end; 212. Second end; 213. First side edge; 214. Fourth side edge; 22. Second winding needle; 221. Third end; 222. Fourth end; 223. Second side edge; 224. Fourth side edge; 23. Winding section; 24. Spare section; 3. Needle nozzle; 31. Winding needle groove; 4. First elastic member; 5. Second elastic member; 6. Battery cell; 7. Pin shaft. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0038] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0039] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0040] In one embodiment, please refer to Figures 1 to 4 The needle winding mechanism includes a needle winding seat 1 and a needle winding assembly 2.

[0041] The winding needle assembly 2 is used for winding the battery cell, and includes a first winding needle 21 and a second winding needle 22. One end of the first winding needle 21 and one end of the second winding needle 22 are both swing mounting ends swingably configured on the winding needle seat 1. For the convenience of distinguishing descriptions, the two ends of the first winding needle 21 are respectively a first end 211 and a second end 212, and the first end 211 is the swing mounting end of the first winding needle 21, and the two ends of the second winding needle 22 are respectively a third end 221 and a fourth end 222, and the third end 221 is the swing mounting end of the second winding needle 22.

[0042] The winding needle assembly 2 includes a winding section 23 and a spare section 24. The winding section 23 is used to wind the battery cell 6 and is covered by the battery cell 6, and the spare section 24 is located between the winding section 23 and the swing mounting end. The portion of the first winding needle 21 that constitutes the spare section 24 is located between the first end 211 and the portion of the first winding needle 21 that constitutes the winding section 23, and the portion of the second winding needle 22 that constitutes the spare section 24 is located between the third end 221 and the portion of the second winding needle 22 that constitutes the winding section 23.

[0043] The winding section 23 has a first side edge 213 and a second side edge 223 arranged in the width direction, the first side edge 213 is on the first winding needle 21, and the second side edge 223 is on the second winding needle 22. At least when the winding needle assembly is pulled out from the battery cell 6, the distance between the first side edge 213 and the second side edge 223 gradually decreases from the swing mounting end of the first winding needle 21 to the other end. In this way, it is convenient to pull out the first winding needle 21 and the second winding needle 22, and it is not easy to take out the central part of the battery cell 6.

[0044] The straight-line distance a between the end of the winding section 23 close to the winding needle seat 1 and the swing axis of the first winding needle 21, and the straight-line distance b between the end of the winding section 23 away from the winding needle seat 1 and the swing axis of the first winding needle 21, 0.3≤a / b≤1. Specifically, a / b can be 0.3, 0.5 or 1, or any other value between 0.3 and 1. When the inclination angle of the first winding needle 21 and the second winding needle 22 is constant, by reasonably setting the distance between the winding section 23 and the swing axis, the gap between the battery cells 6 at the end of the winding section 23 close to the winding needle seat 1 can be made larger, so that when the first winding needle 21 and the second winding needle 22 are pulled out, the problem of core pulling is less likely to occur.

[0045] Regarding the width direction of the winding section 23 , in the present application, the width direction of the winding section 23 is perpendicular to the extension direction of the swing axis of the first winding needle 21 , and the width direction of the winding section 23 can be understood as the swing direction of the first winding needle 21 .

[0046] Since the first winding needle 21 and the second winding needle 22 are swingably configured on the winding needle seat 1, there may be various situations at least when the winding needle assembly 2 is pulled out from the battery cell 6. For example, when the winding needle assembly 2 is pulled out from the battery cell 6, the distance between the first side edge 213 and the second side edge 223 gradually decreases from the swinging installation end of the first winding needle 21 to the other end; for another example, from the beginning of winding the battery cell on the winding needle assembly 2, the distance between the first side edge 213 and the second side edge 223 gradually decreases from the swinging installation end of the first winding needle 21 to the other end; for another example, after the winding needle mechanism is installed, the distance between the first side edge 213 and the second side edge 223 always satisfies the situation of gradually decreasing from the swinging installation end of the first winding needle 21 to the other end.

[0047] In one embodiment, please refer to Figure 2 and Figure 3On a plane perpendicular to the swing axis of the first winding needle 21, the projection of the winding section 23 on the first winding needle 21 and the projection of the winding section 23 on the second winding needle 22 are both between the projection of the first side edge 213 and the projection of the second side edge 223, and the distance between the projection of the first side edge 213 and the projection of the second side edge 223 gradually decreases along the first winding needle 21 and away from the winding needle seat 1. The first winding needle 21 has a third side edge 214, and the second winding needle 22 has a fourth side edge 224. In the swing direction of the first winding needle 21, the first side edge 213 and the third side edge 214 are arranged at intervals, and the second side edge 223 and the fourth side edge 224 are arranged at intervals. On a plane perpendicular to the swing axis of the first winding needle 21, the projection of the third side edge 214 and the projection of the fourth side edge 224 are both between the projection of the first side edge 213 and the projection of the second side edge 223.

[0048] Further, in one embodiment, please refer to Figure 2 and Figure 3 , the relationship between a and b satisfies: 0.47≤a / b≤0.6. Specifically, a / b can be 0.47, 0.52 or 0.6, or any other value between 0.47 and 0.6.

[0049] Specifically, in one embodiment, please refer to Figure 2 and Figure 3 The sum of the overall dimensions of the winding needle assembly 2 and the winding needle seat 1 after assembly is 180.5mm, and the value range of b is: 113mm≤b≤148mm (please confirm whether it is appropriate). b can be 113mm, 133mm or 148mm, or any other value between 113mm and 148mm. In one embodiment, the height specifications of the battery cell 6 are usually 60mm, 70mm and 80mm. According to the specifications of the battery cell 6, the length range of the winding section 23 can be 60mm to 90mm.

[0050] In one embodiment, please refer to Figure 2 and Figure 3 , the outer surface of the joint between the spare section 24 and the winding section 23 is flush. This facilitates the processing of the spare section 24, and the cross-sectional size of the spare section 24 is large, which can enhance the strength of the winding needle. In some other embodiments, the cross-sectional size of the spare section 24 can also be smaller than the cross-sectional size of the winding section 23, or the cross-sectional size of the spare section 24 can also be larger than the cross-sectional size of the winding section 23.

[0051] Further, in one embodiment, please refer to Figure 3The needle winding mechanism further includes a first elastic member 4, which is disposed on the needle winding seat 1 and is used to apply an elastic force to the swing mounting end to bring the second end 212 and the fourth end 222 closer to each other. The first elastic member 4 can be configured in a variety of different ways, such as the first end 211 or the third end 221 can be subjected to the force of the first elastic member 4, or the first end 211 and the third end 221 can be subjected to the force of the first elastic member 4 at the same time.

[0052] Further, in one embodiment, please refer to Figure 3 The needle winding mechanism further includes a second elastic member 5, which is disposed on the needle winding seat 1 and is used to apply an elastic force to the swing mounting end to move the second end 212 and the fourth end 222 away from each other. The second elastic member 5 can also be configured in a variety of different ways, such as the first end 211 or the third end 221 can be subjected to the force of the second elastic member 5, or the first end 211 and the third end 221 can be subjected to the force of the second elastic member 5 at the same time.

[0053] In one embodiment, please refer to Figure 3 The number of the first elastic members 4 is at least two, at least one first elastic member 4 is used to apply elastic force to the first winding needle 21 , and at least one first elastic member 4 is used to apply elastic force to the second winding needle 22 .

[0054] The number of the second elastic members 5 is at least two, at least one second elastic member 5 is used to apply elastic force to the first winding needle 21 , and at least one second elastic member 5 is used to apply elastic force to the second winding needle 22 .

[0055] The first elastic member 4 acting on the first winding needle 21 and the second elastic member 5 acting on the first winding needle 21 are respectively located on both sides of the swing axis of the first winding needle 21 in the length direction of the first winding needle 21 .

[0056] In one embodiment, the elastic force applied by the first elastic member 4 is greater than the elastic force applied by the second elastic member 5 to keep the distance between the projection of the first side edge 213 and the projection of the second side edge 223 gradually decreasing along the first winding needle 21 and away from the winding needle seat 1.

[0057] In one embodiment, please refer to Figure 3 , the number of the first elastic members 4 is two, and the number of the second elastic members 5 is also two. For details, please refer to Figure 1 , the first elastic member 4 and the second elastic member 5 are both springs.

[0058] Please refer to Figure 4The needle reel seat 1 has a needle reel mounting hole 11, the first end 211 of the first needle reel 21 and the third end 221 of the second needle reel 22 are both inserted into the needle reel mounting hole 11, the first end 211 of the first needle reel 21 and the third end 221 of the second needle reel 22 are installed in the needle reel mounting hole 11 through the pin 7, so as to realize the installation of the first needle reel 21 and the second needle reel 22. The needle reel seat 1 also has an elastic member hole 12, which is connected with the needle reel mounting hole 11, and the number of the elastic member holes 12 corresponds to the number of the elastic members. After the first elastic member 4 and the second elastic member 5 are respectively installed in the corresponding elastic member holes 12, they abut against the corresponding needle reel.

[0059] In one embodiment, in order to prevent the spring from exiting the elastic member hole 12, a top screw is installed at the opening of the elastic member hole 12 for blocking. By adjusting the depth of the top screw screwed into the elastic member hole 12, the compression amount of the spring can be adjusted, thereby adjusting the elastic force of the spring. In one embodiment, the elastic force of the first elastic member 4 and the second elastic member 5 is adjusted by the top screw to keep the distance between the projection of the first side edge 213 and the projection of the second side edge 223 gradually decreasing along the direction extending from the first winding needle 21 and away from the winding needle seat 1.

[0060] In one embodiment, please refer to Figure 3 The needle winding structure further includes a needle nozzle 3 , which has a needle winding groove 31 , and the second end 212 and the fourth end 222 are both inserted into the needle winding groove 31 .

[0061] In one embodiment, please refer to Figure 2 The first winding needle 21 and the second winding needle 22 are both arranged horizontally, the second end 212 of the first winding needle 21 hangs downward, and the fourth end 222 of the second winding needle 22 is tilted upward, so that the heads of the first winding needle 21 and the second winding needle 22 are close to each other and can be smoothly inserted into the groove of the needle mouth 3, so that the width of the winding needle close to the head is smaller than the width close to the winding needle seat 1, which is convenient for cutting without core pulling.

[0062] Please refer to Figure 3 When the winding needle assembly 2 has a spare section 24, the gap between the winding needle assembly 2 and the left inner circle of the battery core 6 is larger, and the problem of core pulling is less likely to occur.

[0063] In one embodiment, please refer to Figure 3 , the swing axis of the first winding needle 21 coincides with the swing axis of the second winding needle 22. Specifically, the first end 211 of the first winding needle 21 and the third end 221 of the second winding needle 22 share a pin 7, and the center line of the pin 7 is the swing axis of the first winding needle 21. Specifically, in one embodiment, the first end 211 of the first winding needle 21 and the third end 221 of the second winding needle 22 are stacked together in the extension direction of the swing axis of the first winding needle 21.

[0064] In one embodiment, please refer to Figure 2The first winding needle 21 and the second winding needle 22 are both flat needles, the first side edge 213 and the third side edge 214 are arranged in the width direction of the first winding needle 21, and the second side edge 223 and the fourth side edge 224 are arranged in the width direction of the second winding needle 22.

[0065] In one embodiment, the working principle of the winding needle mechanism is described as follows: when it is necessary to wind the diaphragm electrode sheet, the diaphragm electrode sheet is wound on the winding section 23, and the winding needle assembly 2 rotates to start winding the diaphragm and the electrode sheet. After the winding is completed, the needle mouth 3 is separated from the first winding needle 21 and the second winding needle 22, and then the winding needle assembly 2 can be pulled out from the battery cell 6.

[0066] In some embodiments of the battery winding machine, the battery winding machine includes a winding needle mechanism and a cutting mechanism. The winding needle mechanism is the winding needle mechanism described in any one of the above embodiments, which will not be described in detail.

[0067] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A needle winding mechanism, characterized in that: include: Needle coil holder; and a needle winding assembly, the needle winding assembly comprising a first needle winding and a second needle winding; one end of the first needle winding and one end of the second needle winding are both swing mounting ends swingably mounted on the needle winding seat; The winding needle assembly comprises a winding section and a spare section, the winding section is used for winding the battery cell and is covered by the battery cell, the spare section is between the winding section and the winding needle seat, the winding section has a first side edge and a second side edge arranged in the width direction, the first side edge is on the first winding needle, and the second side edge is on the second winding needle; at least when the winding needle assembly is pulled out of the battery cell, the distance between the first side edge and the second side edge gradually decreases from the swing installation end of the first winding needle to the other end; The straight-line distance between the end of the winding section close to the winding needle seat and the swing axis of the first winding needle is a, and the straight-line distance between the end of the winding section away from the winding needle seat and the swing axis is b. The relationship between a and b satisfies: 0.3≤a / b≤1.

2. The needle winding mechanism according to claim 1, characterized in that: The relationship between a and b satisfies: 0.47≤a / b≤0.

6.

3. The needle winding mechanism according to claim 1 or 2, characterized in that: The outer surface of the portion where the spare section is connected to the winding section is flush.

4. The needle winding mechanism according to claim 1 or 2, characterized in that: The two ends of the first winding needle are respectively a first end and a second end, the first end is a swing mounting end of the first winding needle, the two ends of the second winding needle are respectively a third end and a fourth end, the third end is a swing mounting end of the second winding needle, the winding needle mechanism also includes a first elastic member, the first elastic member is arranged on the winding needle seat, and is used to apply an elastic force to the first end and / or the third end to make the second end and the fourth end approach each other.

5. The needle winding mechanism according to claim 4, characterized in that: The needle winding mechanism further comprises a second elastic member, which is disposed on the needle winding seat and is used to apply an elastic force to the first end and / or the third end so as to move the second end and the fourth end away from each other.

6. The needle winding mechanism according to claim 5, characterized in that: The number of the first elastic members is at least two, at least one of the first elastic members is used to apply elastic force to the first winding needle, and at least one of the first elastic members is used to apply elastic force to the second winding needle; the number of the second elastic members is at least two, at least one of the second elastic members is used to apply elastic force to the first winding needle, and at least one of the second elastic members is used to apply elastic force to the second winding needle; the first elastic member acting on the first winding needle and the second elastic member acting on the first winding needle are respectively located on both sides of the swing axis of the first winding needle in the length direction of the first winding needle.

7. The needle winding mechanism according to claim 6, characterized in that: The first elastic member is a spring and / or the second elastic member is a spring.

8. The needle winding mechanism according to claim 1 or 2, characterized in that: The swing axis of the first winding needle coincides with the swing axis of the second winding needle.

9. The needle winding mechanism according to claim 1 or 2, characterized in that: The needle winding mechanism comprises a needle mouth, and the needle mouth has a needle winding groove, and one end of the first needle winding and one end of the second needle winding are both inserted into the needle winding groove.

10. A battery winding machine, comprising a winding needle mechanism and a cutting mechanism, wherein the winding needle mechanism is the winding needle mechanism according to any one of claims 1 to 9.

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