Winding needle device and battery cell winding equipment

Abstract

The invention provides a winding needle device and battery cell winding equipment. Wherein the winding needle device comprises a winding piece, the winding piece can rotate around the axis of the winding piece, the outer surface of the winding piece is provided with an inward concave groove, and a stopping surface is arranged in the groove; the movable part is movably arranged in the groove between a first position and a second position, under the condition that the movable part is located at the first position, the first side of the movable part is separated from the abutting surface, and under the condition that the movable part is located at the second position, the first side of the movable part abuts against the abutting surface; the driving assembly is connected with the movable part so as to drive the movable part to move between the first position and the second position; wherein the movable part comprises a plurality of abutting parts, when the movable part is located at the first position, the abutting parts are separated from the abutting surfaces, and when the movable part is located at the second position, the abutting parts abut against the abutting surfaces.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery cell manufacturing, and more particularly, to a winding needle device and a battery cell winding equipment comprising the same. BACKGROUND

[0002] In the process of winding the battery cell by the winding needle, the end of the diaphragm needs to be clamped first. In the prior art, the clamping of the diaphragm end is usually achieved by two inner clamping needles arranged in the winding needle. In the clamping process, the diaphragm needs to pass through the gap between the two inner clamping needles. However, in the case of clamping the diaphragm of a battery cell with a large circumference by the inner clamping needle, since the diameter of the inner circle of the battery cell is large, the diaphragm of the inner circle of the battery cell is prone to collapse after the battery cell is stripped, which affects the performance of the battery cell. SUMMARY

[0003] An object of the present application is to provide a new technical solution of a winding needle device, which can at least solve the problem that the diaphragm of the inner circle of the battery cell is prone to collapse in the prior art.

[0004] Another object of the present application is to provide a battery cell winding equipment comprising the above winding needle device.

[0005] According to a first aspect of the present application, a winding needle device is provided, comprising: a winding member rotatable about its own axis, the winding member being inwardly recessed with a groove for arranging a movable member, the groove having a stop surface; a movable member movably arranged in the groove between a first position and a second position, a first side of the movable member being spaced apart from the stop surface when the movable member is in the first position, and the first side of the movable member being stopped by the stop surface when the movable member is in the second position; a driving assembly connected with the movable member to drive the movable member to move between the first position and the second position; wherein the movable member comprises: a plurality of stop portions, the stop portions being spaced apart from the stop surface when the movable member is in the first position, and the stop portions being stopped by the stop surface when the movable member is in the second position.

[0006] Optionally, the movable member further comprises a connecting portion formed as an elongated block extending in the axial direction of the winding member, the length direction of the connecting portion being parallel to the axis of the winding member; the connecting portion is connected with the driving assembly; the plurality of stop portions are arranged in the connecting portion in the axial direction of the winding member, and the plurality of stop portions are driven by the connecting portion.

[0007] Optionally, the groove is formed as an elongated slot extending along the axial direction of the winding member. The stop surface extends along the axial direction of the winding member.

[0008] Optionally, the groove further has a contact surface oppositely arranged with the stop surface and spaced apart along the circumferential direction of the winding member. The movable member is movable between the stop surface and the contact surface, a first side of the movable member faces the stop surface, and a second side of the movable member faces the contact surface.

[0009] Optionally, the first side surface of the connecting portion is oppositely arranged with the stop surface. The stop portion is formed as a protrusion extending obliquely towards the stop surface relative to the first side surface of the connecting portion.

[0010] Optionally, an end surface of the protrusion towards the stop surface is formed as an arc surface.

[0011] Optionally, the winding member comprises two movable half-needles oppositely arranged, and an outer surface of each of the movable half-needles is formed as an arc surface.

[0012] Optionally, the two movable half-needles are movable along the radial direction of the winding member respectively to change the circumference of the winding surface.

[0013] Optionally, the groove penetrates through two end surfaces of the winding member along the axial direction of the winding member respectively.

[0014] Optionally, the contact surface is provided with a guide hole, and the winding needle device further comprises: A guide member, one end of the guide member is arranged on the second side of the movable member, and the guide member is movably arranged in the guide hole along the axial direction of the guide hole.

[0015] Optionally, the driving assembly comprises: A push rod, the push rod is movably arranged in the winding member along the axial direction of the winding member; A driving member, the driving member cooperates with the push rod to drive the push rod to move along the axial direction of the winding member; A push block, the push block is connected with the push rod and moves synchronously with the push rod, and the push block has an oblique surface extending obliquely relative to the axial direction of the winding member; A driving roller, the driving roller is rotatably arranged on the movable member, an outer circumferential surface of the driving roller abuts against the oblique surface, and the push block cooperates with the driving roller to drive the movable member.

[0016] Optionally, the groove further has an abutting surface opposite to the abutting surface, and the driving assembly further comprises: a first elastic member arranged between the second side of the movable member and the abutting surface, a first end of the first elastic member connected to the second side of the movable member, and a second end of the first elastic member connected to the abutting surface, the first elastic member pressing the movable member to press the movable member against the abutting surface when the movable member is in the second position.

[0017] According to a second aspect of the present application, there is provided a winding device for an electric core, comprising the winding needle device of the first aspect.

[0018] Optionally, the winding device for the electric core further comprises: a pushing assembly arranged close to the outer surface of the winding member, the pushing assembly being movable to push the winding member into the groove.

[0019] Optionally, the pushing assembly comprises: a support movably arranged outside the winding member; two abutting rollers arranged on the support and spaced apart along the circumference of the winding member, the two abutting rollers being used to abut the winding member against the outer surface of the winding member, and the winding member between the two abutting rollers corresponding to the groove.

[0020] Optionally, the pushing assembly further comprises a movable roller movably arranged on the support and between the two abutting rollers, the movable roller being used to push the winding member into the groove.

[0021] Optionally, the pushing assembly further comprises: a pushing driving member arranged on the support; a mounting seat, a first end of the mounting seat being provided with the movable roller rotatable about an axis of the mounting seat, and a second end of the mounting seat being rotatably connected to the pushing driving member, the pushing driving member being capable of driving the movable roller on the mounting seat to extend into or exit from the groove; a second elastic member arranged between the mounting seat and the pushing driving member, the second elastic member pressing the mounting seat to press the movable roller against the abutting surface when the movable roller extends into the groove.

[0022] Optionally, the movable member comprises a plurality of abutting portions, the number of the movable rollers is a plurality, the plurality of movable rollers are distributed along the axial direction of the winding member and staggered with the plurality of abutting portions.

[0023] Optionally, the battery cell winding device further comprises: A cutting assembly is arranged on the support and located between the two stop rollers, and the cutting assembly is used to cut the winding piece.

[0024] Optionally, the cutting assembly is used to cut the diaphragm between the two stop rollers.

[0025] Optionally, the battery cell winding device further comprises: Two protective covers are arranged on both sides of the cutting assembly at intervals, and each protective cover is movably connected with the support to approach or move away from the winding piece.

[0026] The beneficial effects of the present application are: According to the winding needle device, the recess is arranged on the outer surface of the winding piece, the movable piece arranged in the recess cooperates with the stop surface in the recess, the end of the winding piece is clamped and released, and the winding piece starts to wind the winding piece. By clamping the winding piece in the recess of the winding piece with the movable piece and then winding the battery cell, the yield of the battery cell winding can be improved, the inner circle of the battery cell is prevented from collapsing after the battery cell is separated from the winding piece, and the performance of the battery cell is affected.

[0027] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings incorporated in and forming a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0029] Figure 1 is a schematic view of a state of a winding needle device according to an embodiment of the present application; Figure 2 is a schematic view of another state of a winding needle device according to an embodiment of the present application; Figure 3 is Figure 2 is an enlarged view of the circled part in A of FIG. 8; Figure 4 is a perspective view of a winding piece of a winding needle device according to an embodiment of the present application; Figure 5 is a front view of a winding piece of a winding needle device according to an embodiment of the present application; Figure 6 is a right view of a winding piece of a winding needle device according to an embodiment of the present application; Figure 7is a top view of a winding piece of a winding needle device according to an embodiment of the present application; Figure 8 is a sectional view along Figure 7 line B-B in figure Figure 9 is a perspective view of a partial structure of a driving assembly of a winding needle device according to an embodiment of the present application; Figure 10 is a perspective view of a pushing assembly and a cutting assembly of an electric core winding equipment according to an embodiment of the present application; Figure 11 is a front view of a pushing assembly and a cutting assembly of an electric core winding equipment according to an embodiment of the present application; Figure 12 is a sectional view along Figure 11 line C-C in figure Figure 13 is a left view of a pushing assembly and a cutting assembly of an electric core winding equipment according to an embodiment of the present application; Figure 14 is a top view of a pushing assembly and a cutting assembly of an electric core winding equipment according to an embodiment of the present application; Figure 15 is a perspective view of a partial structure of a pushing assembly of an electric core winding equipment according to an embodiment of the present application; Figure 16 is a perspective view of a cutting assembly and a protective cover of an electric core winding equipment according to an embodiment of the present application.

[0030] Reference signs Winding needle device 100; winding piece 10; groove 11; abutting surface 12; abutting surface 13; fixed half needle 15; movable half needle 16; guide rod 161; cam plate 162; cam groove 163; cam 164; third elastic member 165; first winding needle 17; second winding needle 18; movable member 20; first elastic member 21; guide member 22; connecting portion 23; abutting portion 24; arc surface 241; push rod 31; driving member 32; push block 33; inclined surface 331; driving roller 34; pushing assembly 40; support 41; abutting roller 42; mounting block 421; fourth elastic member 423; guide rod 424; movable roller 43; mounting seat 431; rotating shaft 432; pushing driving member 433; movable end 4331; second elastic member 434; cutting assembly 50; cutting knife 51; protective cover 60; diaphragm conveying assembly 70; diaphragm 71; pole piece conveying assembly 80; pole piece 81; rotating tower 90; overturning support shaft 91; passing rod 92. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0032] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0033] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0034] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0036] The needle winding device 100 according to an embodiment of this application will now be described in detail with reference to the accompanying drawings.

[0037] like Figures 1 to 16 As shown, the needle winding device 100 according to an embodiment of this application includes: a winding member 10, a movable member 20, and a drive assembly.

[0038] Specifically, the winding member 10 is rotatable about its own axis, and the outer surface of the winding member 10 is provided with an inwardly recessed groove 11. The groove 11 has a stop surface 12. The movable member 20 is movably disposed in the groove 11 between a first position and a second position. When the movable member 20 is in the first position, the first side of the movable member 20 is spaced apart from the stop surface 12. When the movable member 20 is in the second position, the first side of the movable member 20 abuts against the stop surface 12. The drive assembly is connected to the movable member 20 to drive the movable member 20 to move between the first position and the second position.

[0039] In other words, the winding needle device 100 according to the embodiment of the present application mainly comprises the winding member 10, the movable member 20 and the driving assembly. The winding member 10 can wind the to-be-wound member by rotating around the axis thereof. Optionally, the to-be-wound member can comprise the diaphragm 71 and / or the pole piece 81, and the diaphragm 71 and the pole piece 81 can be wound on the outer surface of the winding member 10 to form the battery cell. When the winding member 10 winds the diaphragm 71 and the pole piece 81, the diaphragm 71 can be wound on the outer surface of the winding member 10 first, and then the pole piece 81 and the diaphragm 71 can be wound in layers. That is, the innermost circle of the battery cell wound on the winding member 10 can be formed by the diaphragm 71.

[0040] The outer surface of the winding member 10 can be provided with the groove 11, and the groove 11 can be recessed towards the inside of the winding member 10. Part of the inner wall surface of the groove 11 can be formed as the abutting surface 12. In addition, the movable member 20 can be arranged in the groove 11, and the movable member 20 can move in the groove 11 between the first position and the second position.

[0041] In addition, the movable member 20 can be connected with the driving assembly, and the driving assembly can drive the movable member 20 to move between the first position and the second position. Optionally, the output end of the driving assembly can be connected with the movable member 20, and the input end of the driving assembly can extend out of the winding member 10, so that the movable member 20 can be controlled to move by the driving assembly outside the winding member 10.

[0042] During the winding process of the winding member 10, the movable member 20 can be driven by the driving assembly to move to the first position, so that the first side of the movable member 20 and the abutting surface 12 can be spaced apart to form a gap, and the end of the to-be-wound member can extend into the gap. Then the movable member 20 can be driven by the driving assembly to move from the first position to the second position, so that the first side of the movable member 20 abuts against the abutting surface 12, thereby clamping the end of the to-be-wound member by the movable member 20 and the abutting surface 12, and then the winding member 10 can be rotated to gradually wind the to-be-wound member on the outer surface of the winding member 10.

[0043] That is, by cooperating the movable member 20 with the groove 11 on the outer surface of the winding member 10, the end of the to-be-wound member can be pressed against the winding member 10, so as to fix the end of the to-be-wound member during the winding of the to-be-wound member. After the winding of the winding member 10 is completed, the battery cell can be discharged. Since the end of the to-be-wound member of the innermost circle of the battery cell does not need to pass through the gap between the two inner clamping needles, but can be abutted against the groove 11 of the winding member 10 by the movable member 20, when the movable member 20 releases the end of the to-be-wound member during the discharging process, the inner circle of the to-be-wound member can be prevented from collapsing, thereby affecting the performance of the wound battery cell.

[0044] Thus, according to the winding needle device 100 provided by the embodiment of the present application, by arranging the groove 11 on the outer surface of the winding member 10, the movable member 20 arranged in the groove 11 cooperates with the abutting surface 12 in the groove 11, so that the clamping and releasing of the end portion of the winding member can be realized, so as to facilitate the winding of the winding member 10 on the winding member. By abutting the winding member 10 in the groove 11 of the winding member 10 by the movable member 20 and then winding the battery cell, the yield of the battery cell winding can be improved, and the collapse of the inner circle of the battery cell after the battery cell is separated from the winding member 10 can be prevented, so as to affect the performance of the battery cell.

[0045] Optionally, the winding member 10 can be formed as a cylindrical member, the outer circumferential surface of the winding member 10 can be used to wind the diaphragm 71 and the pole piece 81, the groove 11 can be arranged on the outer circumferential surface of the winding member 10, and the rotation of the winding member 10 can be driven by a driving structure, for example, the driving structure can drive the winding member 10 to rotate around the axis of the winding member 10 through a belt transmission.

[0046] According to one embodiment of the present application, the groove 11 is formed as an elongated slot extending along the axial direction of the winding member 10, and the abutting surface 12 extends along the axial direction of the winding member 10.

[0047] Specifically, the groove 11 on the outer surface of the winding member 10 can be in a strip shape, and the length direction of the groove 11 can be parallel to the axis of the winding member 10. A part of the inner wall surface of the groove 11 can extend along the axial direction of the winding member 10 and be formed as the abutting surface 12, so that the end portion of the winding member can be completely inserted into the groove 11 and be abutted on the abutting surface 12 by the movable member 20.

[0048] It should be noted that the groove 11 can extend substantially along the axial direction of the winding member 10. That is, the extension direction of the groove 11 can be parallel to the axial direction of the winding member 10, or can be slightly inclined relative to the axial direction of the winding member 10. The abutting surface 12 can extend along the extension direction of the groove 11, and at this time, the extension direction of the abutting surface 12 is slightly inclined relative to the axial direction of the winding member 10, and the abutting surface 12 can still cooperate with the movable member 20 to clamp the winding member.

[0049] The length of the groove 11 in the axial direction of the winding member 10 can be not less than the width of the winding member, so as to avoid the winding member from being wrinkled when the winding member is inserted into the groove 11. The length of the abutting surface 12 in the axial direction of the winding member 10 is not less than the width of the winding member, so that the abutting surface 12 has enough area to contact the end portion of the winding member, and the winding member can be prevented from being wrinkled.

[0050] Optionally, the two ends of the groove 11 in the axial direction of the winding member 10 can respectively penetrate the two end surfaces of the winding member 10 in the axial direction of the winding member 10, so as to facilitate the observation of the state of the movable member 20 and the winding member from the end portion of the winding member 10, and also facilitate the installation of the movable member 20 and the driving assembly on the winding member 10.

[0051] In the embodiment, the recess 11 and the abutting surface 12 are arranged along the axial direction of the winding member 10, so that the abutting surface 12 can cooperate with the movable member 20 to clamp the end of the winding member and guide the winding member to wind around the circumference of the winding member 10, avoiding dislocation between the winding member and the outer surface of the winding member 10, and affecting the accuracy of winding.

[0052] Optionally, the extension direction of the recess 11 can also form an angle with the axial direction of the winding member 10, for example, the recess 11 can extend in a spiral shape on the outer surface of the winding member 10. The abutting surface 12 can extend along the extension direction of the recess 11.

[0053] According to some other embodiments of the present application, the recess 11 further has an abutting surface 13, the abutting surface 13 is arranged opposite to the abutting surface 12 and is spaced apart along the circumference of the winding member 10, the movable member 20 is movable between the abutting surface 12 and the abutting surface 13, the first side of the movable member 20 faces the abutting surface 12, and the second side of the movable member 20 faces the abutting surface 13.

[0054] Specifically, another part of the inner wall surface of the recess 11 can be formed as the abutting surface 13, the abutting surface 13 is opposite to the abutting surface 12, and the abutting surface 13 and the abutting surface 12 are spaced apart along the circumference of the winding member 10. For example, the recess 11 can have two side wall surfaces and a bottom surface, the bottom surface can be connected between the two side wall surfaces, and the two side wall surfaces can be spaced apart. One of the two side wall surfaces can be formed as the abutting surface 12, and the other can be formed as the abutting surface 13.

[0055] The movable member 20 can be arranged between the abutting surface 13 and the abutting surface 12 and movable therebetween. The side of the movable member 20 facing the abutting surface 12 can be the first side of the movable member 20, and the side of the movable member 20 facing the abutting surface 13 can be the second side of the movable member 20.

[0056] When the movable member 20 is in the first position, the first side of the movable member 20 can be spaced apart from the abutting surface 12, and the second side of the movable member 20 can be close to the abutting surface 13. When the movable member 20 is in the second position, the first side of the movable member 20 can abut against the abutting surface 12, and the second side of the movable member 20 can be away from the abutting surface 13.

[0057] In the embodiment, by arranging the abutting surface 13 opposite to the abutting surface 12 and spaced apart along the circumference of the winding member 10, and using the movable member 20 to move between the two surfaces of the recess 11, the movable member 20 can be limited, avoiding the movable member 20 from protruding out of the outer surface of the winding member 10 to interfere with winding.

[0058] In some specific embodiments of the present application, as Figure 5 and9 As shown, the driving assembly comprises a push rod 31, a driving member 32, a push block 33, a driving roller 34 and the first elastic member 21.

[0059] Specifically, the push rod 31 is movably arranged in the winding member 10 along the axial direction of the winding member 10, the driving member 32 cooperates with the push rod 31 to drive the push rod 31 to move along the axial direction of the winding member 10, the push block 33 is connected with the push rod 31 and moves synchronously with the push rod 31, the push block 33 has an inclined surface 331 extending obliquely relative to the axial direction of the winding member 10, the driving roller 34 is rotatably arranged on the movable member 20, the outer circumferential surface of the driving roller 34 abuts against the inclined surface 331, and the push block 33 cooperates with the driving roller 34 to drive the movable member 20.

[0060] In other words, the driving assembly of the embodiment can mainly comprise the push rod 31, the driving member 32, the push block 33, the driving roller 34 and the first elastic member 21. The push rod 31 can be arranged in the winding member 10, the push rod 31 can extend along the axial direction of the winding member 10, and the push rod 31 can move in the winding member 10. The end of the push rod 31 can be connected with the driving member 32, and the driving member 32 can drive the push rod 31 to move in the winding member 10.

[0061] For example, the first end of the push rod 31 can extend out of the end of the winding member 10, the output end of the driving member 32 can be opposite to the end of the winding member 10, and the driving member 32 can drive the push rod 31 to move along the axial direction of the winding member 10. Alternatively, the driving member 32 can be a driving cylinder, the output end of the driving cylinder can be a telescopic end, the telescopic end of the driving cylinder can be arranged opposite to the first end of the push rod 31, and the telescopic end of the driving cylinder can push the push rod 31 into the winding member 10 or release the push rod 31.

[0062] In addition, the push block 33 can be fixedly arranged on the push rod 31, and the push block 33 can move synchronously with the push rod 31. That is, the push block 33 can move along the axial direction of the winding member 10 under the driving of the driving member 32. Part of the outer surface of the push block 33 can be formed as the inclined surface 331, and the inclined surface 331 can be inclined relative to the axial direction of the winding member 10. That is, the push block 33 can be formed as a wedge-shaped member.

[0063] The driving roller 34 can be arranged on the movable member 20 and can rotate on the movable member 20, and the axis of the driving roller 34 can extend along the radial direction of the winding member 10. The inclined surface 331 on the push block 33 can abut against the outer circumferential surface of the driving roller 34.

[0064] Alternatively, the number of the push block 33 and the driving roller 34 can be multiple, and the push block 33 and the driving roller 34 can correspond one by one. Arranging multiple push blocks 33 and multiple driving rollers 34 can facilitate improving the smoothness of the movement of the movable member 20.

[0065] For the convenience of description, the axial direction of the winding member 10 can be defined as the first direction. When the driving member 32 drives the push rod 31 to move in the positive direction of the first direction, the push block 33 also moves in the positive direction of the first direction. The push block 33 can push the driving roller 34 to move downward along the inclined surface 331, so that the movable member 20 connected with the driving roller 34 moves away from the stop surface 12. That is, the push block 33 cooperates with the driving roller 34 to drive the movable member 20 to move from the second position to the first position. Figure 9

[0066] In the embodiment, the movable member 20 can be driven to move from the second position to the first position by the cooperation of the push rod 31, the push block 33 and the driving roller 34, so that the movable member 20 is separated from the stop surface 12. The driving assembly of the embodiment has a simple structure and is arranged in the winding member 10, which is beneficial to save installation space and improve the compactness of the needle device 100. In addition, the driving roller 34 cooperates with the inclined surface 331, which can reduce the friction when the push block 33 pushes the movable member 20, and improve the smoothness of the movement of the movable member 20.

[0067] In some specific embodiments of the present application, the driving assembly further comprises a first elastic member 21. The first elastic member 21 is arranged between the second side of the movable member 20 and the abutting surface 13. The first end of the first elastic member 21 is connected with the second side of the movable member 20, and the second end of the first elastic member 21 is connected with the abutting surface 13. When the movable member 20 is in the second position, the first elastic member 21 is compressed to press the movable member 20 against the stop surface 12.

[0068] Specifically, the movable member 20 can be connected with the abutting surface 13 through the first elastic member 21, and the first elastic member 21 is stretchable in the direction towards the stop surface 12 of the abutting surface 13. The first end of the stretchable direction of the first elastic member 21 can be connected with the second side of the movable member 20, and the second end of the stretchable direction of the first elastic member 21 can be connected with the abutting surface 13. It should be noted that the connection between the first elastic member 21 and the movable member 20, and the connection between the first elastic member 21 and the abutting surface 13, can be fixed connection or abutment, which is not limited herein.

[0069] In addition, when the movable member 20 moves between the first position and the second position, the first elastic member 21 can be in a compressed state. In the process of the movable member 20 moving from the second position to the first position, the driving assembly can overcome the elastic force of the first elastic member 21 applied to the movable member 20, so that the movable member 20 moves away from the stop surface 12. When the movable member 20 is in the second position, the first elastic member 21 is in a compressed state, so that the first elastic member 21 can press the movable member 20 against the stop surface 12, so as to clamp the end of the winding member. ​

[0070] When the movable member 20 is in the first position, the first elastic member 21 can apply an elastic force to the movable member 20 towards the abutting surface 12, so that the movable member 20 has a tendency to move towards the abutting surface 12. After the driving member 32 releases the push rod 31, the output end of the driving member 32 can be spaced apart from the push rod 31, and under the elastic force of the first elastic member 21, the movable member 20 can move from the first position to the second position, so that the driving roller 34 moves upwards along the inclined surface 331, and the push rod 31 and the push block 33 move along the first direction. Figure 9 When the movable member 20 is in the second position and abuts against the abutting surface 12, the first elastic member 21 in the compressed state can press the movable member 20, so that the movable member 20 applies a clamping force to the abutting surface 12 to clamp the end of the to-be-wound member in cooperation with the abutting surface 12.

[0071] In the embodiment, by arranging the first elastic member 21 between the movable member 20 and the abutting surface 13, the first elastic member 21 can drive the movable member 20 to move from the first position to the second position, so that the movable member 20 abuts against the abutting surface 12. Therefore, the driving assembly of the embodiment can drive the movable member 20 to move between the first position and the second position. In addition, by using the elastic force of the first elastic member 21, the end of the to-be-wound member can be clamped in cooperation with the abutting surface 12, so as to avoid the to-be-wound member from loosening and affecting the winding of the wound member 10.

[0072] According to some optional embodiments of the present application, the abutting surface 13 is provided with a guide hole, and the winding needle device 100 further comprises a guide member 22, one end of the guide member 22 is arranged on the second side of the movable member 20, and the guide member 22 is movably arranged in the guide hole in the axial direction of the guide hole.

[0073] Specifically, the guide member 22 can extend in the movement direction of the movable member 20, for example, the abutting surface 13 and the abutting surface 12 can be parallel to each other, the movable member 20 can move in a direction perpendicular to the abutting surface 13, and the guide member 22 can also extend in a direction perpendicular to the abutting surface 13, so as to guide the movable member 20 to move smoothly in the groove 11.

[0074] One end of the guide member 22 can be located in the groove 11 and connected to the second side of the movable member 20, and in addition, the guide member 22 can be arranged in the guide hole on the abutting surface 13 and can move along the guide hole, and the guide hole can extend in the movement direction of the movable member 20. The guide member 22 can limit the movement direction of the movable member 20, and improve the stability of the movement of the movable member 20 in the groove 11.

[0075] Optionally, the first elastic member 21 can be a spring, and the spring can be sleeved on the outer periphery of the guide member 22, so as to further improve the stability of the movement of the movable member 20.

[0076] According to some other embodiments of the present application, as shown in Figure 4 and Figure 9 The movable member 20 comprises a connecting portion 23 and a plurality of abutting portions 24. Specifically, the connecting portion 23 is formed as a long strip-shaped block extending along the axial direction of the winding member 10, the connecting portion 23 is connected with the driving assembly, and the plurality of abutting portions 24 are arranged on the connecting portion 23 and spaced apart along the axial direction of the winding member 10. When the movable member 20 is in the first position, the abutting portions 24 are spaced apart from the abutting surface 12, and when the movable member 20 is in the second position, the abutting portions 24 abut against the abutting surface 12.

[0077] In other words, the movable member 20 of the present embodiment can mainly comprise the connecting portion 23 and the plurality of abutting portions 24, wherein the connecting portion 23 can be used to connect the plurality of abutting portions 24. The connecting portion 23 can be in a long strip shape, and the connecting portion 23 can extend along the axial direction of the winding member 10. That is, the length direction of the connecting portion 23 can be parallel to the axis of the winding member 10.

[0078] In the length direction of the connecting portion 23, the plurality of abutting portions 24 can be arranged at intervals, and the plurality of abutting portions 24 can clamp the end portion of the winding member to be wound in cooperation with the abutting surface 12. Specifically, the driving assembly can be connected with the connecting portion 23 to drive the plurality of abutting portions 24 to move synchronously through the connecting portion 23. When the movable member 20 is in the first position, each abutting portion 24 can be spaced apart from the abutting surface 12 to form a gap, so that the end portion of the winding member to be wound can extend between the abutting portion 24 and the abutting surface 12. When the movable member 20 is in the second position, each abutting portion 24 can abut against the abutting surface 12 to clamp the end portion of the winding member to be wound.

[0079] It should be noted that the connecting portion 23 can extend substantially along the axial direction of the winding member 10. That is, the extension direction of the connecting portion 23 can be parallel to the axial direction of the winding member 10, or can be slightly inclined relative to the axial direction of the winding member 10, as long as the connecting portion 23 can move in the groove 11 and drive the plurality of abutting portions 24 to abut against the abutting surface 12.

[0080] In the present embodiment, by arranging the plurality of abutting portions 24 and driving the plurality of abutting portions 24 through the connecting portion 23, the end portion of the winding member to be wound can be clamped at multiple positions simultaneously when the movable member 20 cooperates with the abutting surface 12 to clamp the end portion of the winding member to be wound, thereby improving the stability of the clamping of the winding member to be wound and avoiding the loosening of the winding member to be wound from affecting the winding process.

[0081] In some specific embodiments of the present application, the first side surface of the connecting portion 23 is arranged opposite to the abutting surface 12, the abutting portion 24 is formed as a protrusion extending obliquely towards the abutting surface 12 relative to the first side surface of the connecting portion 23, and the end surface of the protrusion towards the abutting surface 12 is formed as an arc surface 241.

[0082] Specifically, the side of the connecting portion 23 opposite to the abutting surface 12 can be a first side of the connecting portion 23, and the surface of the first side of the connecting portion 23 can be opposite to the abutting surface 12. The abutting portion 24 can be formed as a protrusion provided on the connecting portion 23, the protrusion can be inclined relative to the surface of the first side of the connecting portion 23, and the inclined direction of the protrusion can be toward the outside of the opening of the abutting surface 12 and the groove 11, so that the abutting portion 24 can be closer to the outer surface of the winding piece 10. Therefore, when the movable piece 20 moves to the second position, the end surface of the protrusion toward the abutting surface 12 can abut against the abutting surface 12, and the first side surface of the connecting portion 23 can be spaced apart from the abutting surface 12, so as to avoid that when the protrusion and the abutting surface 12 clamp the end portion of the winding piece, the connecting portion 23 contacts the end portion of the winding piece to cause the winding piece to be deformed by wrinkling, and at the same time, since the abutting portion 24 is close to the outer surface of the winding piece 10, the length of the winding piece extending into the groove 11 can be reduced, thereby preventing the inner ring of the winding-formed battery cell from collapsing.

[0083] In addition, the end surface of the protrusion toward the abutting surface 12 can be an arc surface 241, and the end portion of the winding piece can be clamped on the abutting surface 12 by the arc surface 241, so as to protect the end portion of the winding piece and avoid damage to the winding piece caused by the protrusion, thereby affecting the performance of the battery cell.

[0084] According to some other embodiments of the present application, the winding piece 10 includes a fixed half needle 15 and two movable half needles 16. The outer surface of the fixed half needle 15 is provided with a groove 11, and the two movable half needles 16 are respectively arranged on both sides of the fixed half needle 15. The outer surfaces of the two movable half needles 16 cooperate with the outer surface of the fixed half needle 15 to form a winding surface for winding the winding piece, and each movable half needle 16 is movable relative to the fixed half needle 15 to adjust the circumference of the winding surface.

[0085] Specifically, the fixed half needle 15 can be connected with a driving structure, and the driving structure can drive the fixed half needle 15 to rotate around the axis of the winding piece 10. The outer surface of the fixed half needle 15 can be a left side surface and a right side surface as shown in Figure 5 The outer surface of the fixed half needle 15 can be a left side surface and a right side surface as shown in

[0086] The outer surface of the fixed half needle 15 can be a left side surface and a right side surface as shown in Figure 5As shown, the outer surface of the movable half needle 16 above the fixed half needle 15 can be the upper side of the movable half needle 16, and the outer surface of the movable half needle 16 below the fixed half needle 15 can be the lower side of the movable half needle 16. The outer surface of the fixed half needle 15 and the outer surface of the movable half needle 16 can jointly form a winding surface, and the winding member 10 can be wound around the winding surface.

[0087] In addition, the movable half needle 16 can be movably connected with the fixed half needle 15, and specifically, the two movable half needles 16 can be respectively moved along the radial direction of the winding member 10 to change the circumference of the winding surface. When the movable half needle 16 moves away from the fixed half needle 15, the circumference of the winding surface can be increased, and when the movable half needle 16 moves close to the fixed half needle 15, the circumference of the winding member 10 can be reduced.

[0088] For example, the movable half needle 16 can be movably connected with the fixed half needle 15 through a guide rod 161, and the guide rod 161 can guide the movable half needle 16 to slide along the radial direction of the winding member 10. A cam 164 can be connected to the movable half needle 16, a cam plate 162 can be arranged in the fixed half needle 15, and the cam plate 162 can be movable relative to the fixed half needle 15. The cam plate 162 can be provided with a cam groove 163, the cam 164 can be connected with the cam groove 163, one end of the cam plate 162 can extend out of the fixed half needle 15 and abut against the end surface of the driving structure of the fixed half needle 15 through a third elastic member 165, and the third elastic member 165 can be a spring. Under the action of the third elastic member 165, the cam plate 162 can be movable, and the movable half needle 16 can be driven to move through the cooperation of the cam groove 163 and the cam 164.

[0089] In the embodiment, the movable half needles 16 are arranged on both sides of the fixed half needle 15, and the circumference of the winding surface of the winding member 10 can be adjusted by the movement of the movable half needles 16. That is, the outer diameter of the winding member 10 can be adjusted so that the pole lugs on the plurality of pole pieces 81 wound by the winding member 10 can be aligned with each other, and the position error between the pole lugs on each pole piece 81 can be reduced. In addition, the groove 11 arranged on the fixed half needle 15 can clamp the winding member 10 on the fixed half needle 15, and the movement of the movable half needles 16 will not affect the fixation of the end of the winding member 10.

[0090] The application also provides an electric core winding device, which comprises the winding needle device 100 according to any one of the above embodiments. Since the winding needle device 100 according to the embodiments of the application has the above technical effects, the electric core winding device according to the embodiments of the application also has corresponding technical effects, that is, the yield of the electric core winding is improved, and the collapse of the inner circle of the electric core after the electric core is separated from the winding member 10 is prevented, which affects the performance of the electric core.

[0091] In some specific embodiments of the present application, the needle winding device 100 further comprises a pushing assembly 40, which is arranged close to the outer surface of the winding member 10 and is movable to push the to-be-wound member into the groove 11.

[0092] Specifically, the pushing assembly 40 can be arranged adjacent to the outer surface of the winding member 10 and is movable towards or away from the winding member 10. When the pushing assembly 40 is close to the winding member 10, the pushing assembly 40 can push the end of the to-be-wound member into the groove 11. When the pushing assembly 40 pushes the end of the to-be-wound member, the movable member 20 can be in the first position, and the pushing assembly 40 can push the end of the to-be-wound member between the movable member 20 and the stop surface 12, so as to facilitate the movable member 20 to move from the first position to the second position and clamp the end of the to-be-wound member together with the stop surface 12.

[0093] After the movable member 20 and the stop surface 12 clamp the end of the winding member 10, the pushing assembly 40 can be withdrawn from the groove 11, and then the winding member 10 can start to wind the to-be-wound member.

[0094] In the present embodiment, by arranging the pushing assembly 40, the to-be-wound member can be automatically pushed into the groove 11 before the winding member 10 starts to wind, which is conducive to improving the winding efficiency of the needle winding device 100.

[0095] According to some optional embodiments of the present application, the pushing assembly 40 comprises a support 41, two stop rollers 42 and a movable roller 43.

[0096] Specifically, the support 41 is movably arranged outside the winding member 10, the two stop rollers 42 are arranged on the support 41 and are spaced apart along the circumference of the winding member 10, and the two stop rollers 42 are respectively used to stop the to-be-wound member on the outer surface of the winding member 10. The movable roller 43 is movably arranged on the support 41 and is located between the two stop rollers 42, and the movable roller 43 is used to push the to-be-wound member into the groove 11.

[0097] In other words, the pushing assembly 40 of the present embodiment can mainly comprise the support 41, the two stop rollers 42 and the movable roller 43. The support 41 is movable towards or away from the winding member 10, and the two stop rollers 42 and the movable roller 43 can be arranged on the support 41 and are synchronously movable with the support 41 to approach or move away from the outer surface of the winding member 10.

[0098] In addition, when the support 41 is close to the winding element 10, the stop rollers 42 can stop the to-be-wound element on the outer surface of the winding element 10, and the to-be-wound element between the two stop rollers 42 can correspond to the groove 11. The movable rollers 43 can be arranged between the two stop rollers 42, and the movable rollers 43 can be connected to the support 41 through a driving structure, and the movable rollers 43 and the stop rollers 42 can rotate independently. The driving structure can drive the movable rollers 43 to extend between the two stop rollers 42, so as to push the to-be-wound element into the groove 11.

[0099] When the to-be-wound element is pushed, the movable rollers 43 can extend into the groove 11. After the pushing of the movable rollers 43 is completed, the movable element 20 can be switched from the first position to the second position to clamp the to-be-wound element with the stop surface 12, and then the movable rollers 43 can be withdrawn from the groove 11, so as to facilitate the winding of the winding element 10 on the to-be-wound element and avoid interference between the movable rollers 43 and the to-be-wound element.

[0100] In the embodiment, by arranging the two stop rollers 42 on the support 41, a part of the to-be-wound element can be pressed on the outer surface of the winding element 10, so as to facilitate the pushing of the part of the to-be-wound element into the groove 11 by the movable rollers 43 arranged between the two stop rollers 42, and facilitate the clamping of the to-be-wound element by the movable element 20 and the stop surface 12. Since the movable rollers 43 can rotate independently, the movable rollers 43 can roll the end of the to-be-wound element along the stop surface 12 on the stop surface 12, so as to facilitate the pressing of the end of the to-be-wound element on the stop surface 12 by the movable element 20, and avoid wrinkles or damage to the to-be-wound element when the to-be-wound element is pushed.

[0101] Alternatively, the stop rollers 42 can be connected with the support 41 through the mounting block 421, and the stop rollers 42 can be rotatably connected with the mounting block 421. The support 41 can be provided with a guide rod 424, and the guide rod 424 can slide relative to the support 41 in a direction close to or away from the winding element 10. The mounting block 421 can be mounted on one end of the guide rod 424 away from the support 41, and the fourth elastic element 423 can be sleeved on the guide rod 424. The fourth elastic element 423 can be a spring, one end of the fourth elastic element 423 can be connected with the mounting block 421, and the other end of the fourth elastic element 423 can be connected with the support 41. When the stop rollers 42 stop the to-be-wound element on the outer surface of the winding element 10, the fourth elastic element 423 can buffer the stop rollers 42, so as to avoid damage to the to-be-wound element by the stop rollers 42.

[0102] According to some other embodiments of the present application, the pushing assembly 40 further comprises a pushing driving element 433, a mounting seat 431, and a second elastic element 434.

[0103] The pushing member 433 is arranged on the support 41, the first end of the mounting seat 431 is provided with the movable roller 43 which can rotate about its axis, the second end of the mounting seat 431 is rotationally connected with the pushing member 433, the pushing member 433 can drive the movable roller 43 on the mounting seat 431 to extend into or exit from the groove 11, the second elastic member 434 is arranged between the mounting seat 431 and the pushing member 433, and in the case that the movable roller 43 extends into the groove, the second elastic member 434 is pressed against the mounting seat 431 to press the movable roller 43 against the stop surface 12.

[0104] Specifically, the pushing member 433 can be mounted on the support 41, the pushing member 433 can have a movable end 4331, and the movable end 4331 of the pushing member 433 can be close to or away from the winding member 10. The movable end 4331 of the pushing member 433 can be connected with the second end of the mounting seat 431 to drive the mounting seat 431 to be close to or away from the winding member 10. In addition, The first end of the mounting seat 431 can extend towards the winding member 10, the movable roller 43 can be mounted on the first end of the mounting seat 431, and the movable roller 43 can rotate about its axis, and the axis of the movable roller 43 can extend substantially along the axial direction of the winding member 10. When the pushing member 433 drives the mounting seat 431 to be close to the winding member 10, the movable roller 43 can extend into the groove 11, so as to push the to-be-wound member into the groove 11.

[0105] The second end of the mounting seat 431 can be rotationally connected with the movable end 4331 of the pushing member 433, for example, the second end of the mounting seat 431 is hinged with the movable end 4331 of the pushing member 433 through the rotating shaft 432, so that the movable roller 43 on the mounting seat 431 can rotate about the axis of the rotating shaft 432.

[0106] In addition, the second elastic member 434 can be arranged between the second end of the mounting seat 431 and the movable end 4331 of the pushing member 433, and the second elastic member 434 can be spaced apart from the rotating shaft 432. When the movable roller 43 extends into the groove 11, the mounting seat 431 can be pressed by the second elastic member 434, so that the movable roller 43 on the mounting seat 431 is better pressed against the stop surface 12 in the groove 11, thereby cooperating with the stop surface 12 to clamp the to-be-wound member, so that the movable member 20 cooperates with the stop surface 12 to clamp the to-be-wound member, to prevent the to-be-wound member from loosening.

[0107] In the embodiment, the active roller 43 can be extended into or withdrawn from the groove 11 by the driving of the pushing driving member 433, so as to push the to-be-wound member into the groove 11 by the active roller 43. In addition, since the mounting seat 431 is rotationally connected with the pushing driving member 433 and the two are abutted by the second elastic member 434, the mounting seat 431 can be floated on the pushing driving member 433 under the action of the second elastic member 434, so that the active roller 43 can better adhere to the stop surface 12, and the adhering state of the active roller 43 to the to-be-wound member can be maintained in the process of pushing the to-be-wound member.

[0108] According to some other embodiments of the present application, the active member 20 comprises a plurality of stop portions 24, and the number of the active rollers 43 is also a plurality. The plurality of active rollers 43 are distributed along the axial direction of the wound member 10 and are staggered with the plurality of stop portions 24.

[0109] Specifically, a plurality of active rollers 43 can be arranged on the support 41, and the plurality of active rollers 43 can be distributed along the axial direction of the wound member 10. That is, the distribution direction of the plurality of active rollers 43 and the distribution direction of the plurality of stop portions 24 can be the same.

[0110] In addition, the plurality of active rollers 43 and the plurality of stop portions 24 can be staggered, so that each active roller 43 can be extended between the corresponding two stop portions 24. After the to-be-wound member is pushed into the groove 11 by the active roller 43, the stop portions 24 of the active member 20 can stop the to-be-wound member on the stop surface 12.

[0111] In some specific embodiments of the present application, the winding needle device 100 further comprises a cutting assembly 50, which is arranged on the support 41 and located between the two stop rollers 42. The cutting assembly 50 is used for cutting the to-be-wound member.

[0112] Specifically, the cutting assembly 50 can comprise a cutter 51, which can be arranged between the two stop rollers 42. After the to-be-wound member is stopped on the outer surface of the wound member 10 by the stop roller 42, the cutter 51 of the cutting assembly 50 can cut the to-be-wound member, and after the to-be-wound member is cut, two end portions can be formed, one of which can be pushed into the groove 11 by the active roller 43. Optionally, the cutter 51 can cut the to-be-wound member by heating.

[0113] According to some optional embodiments of the present application, the winding needle device 100 further comprises two protective covers 60, which are arranged on both sides of the cutting assembly 50 at intervals. Each protective cover 60 is movably connected with the support 41 to approach or move away from the wound member 10.

[0114] Specifically, the cutting assembly 50 can be provided with two protective covers 60 on both sides of the cutter 51, and the protective covers 60 can be movably connected to the support 41 through springs and guide structures. When the stop roller 42 stops the winding piece on the outer surface of the winding piece 10, the two protective covers 60 can elastically abut against the winding piece stopped on the outer surface of the winding piece 10 under the action of the springs, and in the process of the support 41 continuously approaching the winding piece 10, the springs connected to the two protective covers 60 can be compressed, so that the cutting assembly 50 can be exposed from between the two protective covers 60 to cut the winding piece.

[0115] In the embodiment, the cutting assembly 50 is provided with the protective covers 60 on both sides, so that the cutting assembly 50 can be protected, and the cutter 51 in the cutting assembly 50 can be heat insulated.

[0116] In some other embodiments of the present application, the two protective covers 60 can be connected with protective cover driving structures, and the protective cover driving structures can be arranged on the support 41. When the cutting assembly 50 needs to cut the winding piece, the protective cover driving structures can drive the protective covers 60 to move away from the winding piece, so that the cutting assembly 50 can be exposed from between the two protective covers 60 to cut the winding piece.

[0117] Optionally, the winding needle device 100 further comprises two diaphragm conveying assemblies 70, two pole piece conveying assemblies 80 and a turret 90. The two diaphragm conveying assemblies 70 and the two pole piece conveying assemblies 80 are staggered. The diaphragm conveying assembly 70 can convey diaphragms 71 to the winding piece 10, and the pole piece conveying assembly 80 can convey pole pieces 81 to the winding piece 10.

[0118] The turret 90 can be provided with two winding pieces 10, and the two winding pieces 10 can be distributed at intervals and can be provided with a turnover support shaft 91 between the two winding pieces 10. The turnover support shaft 91 can be located at the rotation center of the turret 90. The turnover support shaft 91 can have a plurality of extension ends extending outward, and each extension end can be provided with a passing rod 92 at the end.

[0119] For the convenience of description, the two winding pieces 10 can be defined as a first winding needle 17 and a second winding needle 18 respectively. When the first winding needle 17 completes winding, the turret 90 can be turned to the position as shown in Figure 1 so that a part of the diaphragms 71 conveyed by the two diaphragm conveying assemblies 70 is pried open by the passing rods 92 of the turnover support shaft 91, the outer circumferential surface of the passing rods 92 abuts against a part of the diaphragms 71, and another part of the diaphragms 71 conveyed by the two diaphragm conveying assemblies 70 can pass from the circumferential side of the second winding needle 18.

[0120] Then the pushing assembly 40 can approach the second winding needle 18 to form a position as shown in Figure 2In the indicated state, the two stop rollers 42 inside the pusher assembly 40 can stop the two diaphragms 71 against the outer surface of the second winding needle 18, so that the diaphragms 71 stopped against the outer surface of the second winding needle 18 are opposite to the groove 11. At this time, the protective cover 60 can also stop against the surface of the diaphragm 71. At this time, the movable member 20 can be spaced apart from the stop surface 12, and the cutting assembly 50 can be exposed between the two protective covers 60 to cut the diaphragm 71 between the two stop rollers 42. After the diaphragm 71 is cut, it forms two parts. One part can be finished by the first winding needle 17, and the other part can be pushed into the groove 11 by the movable roller 43 and clamped by the movable member 20 and the stop surface 12.

[0121] This application embodiment also provides a winding method according to the above-described battery cell winding equipment, the battery cell winding equipment further including a feeding assembly 40 and a cutting assembly 50, the winding method including the following steps: Drive the winding component 10 to move to the winding station; Control the movable part 20 to move to the first position; The drive pusher assembly 40 stops the part to be wound against the outer surface of the part to be wound 10; Control the cutting component 50 to cut the workpiece to be wound; The control pusher assembly 40 conveys the cut part to be wound into the groove 11; The movable part 20 is moved to the second position, and the first side of the movable part 20 clamps the part to be wound with the stop surface 12. The drive winding member 10 rotates about its own axis to wind the part to be wound.

[0122] The winding method of this embodiment will be described in detail below, taking a wound battery cell as an example.

[0123] First, the turret 90 drives the winding member 10 to the winding station. Then, the drive assembly drives the movable member 20 to the first position, creating a gap between the movable member 20 and the stop surface 12. Next, the pusher assembly 40 is driven to approach the winding member 10. The two stop rollers 42 in the pusher assembly 40 can stop the diaphragm 71 against the outer surface of the winding member 10, making the diaphragm 71 against the outer surface of the winding member 10 opposite to the groove 11. Then, the cutter 51 of the cutting assembly 50 can cut... After the diaphragm 71 is cut, the movable roller 43 in the pusher assembly 40 can push the cut end of the diaphragm 71 between the movable member 20 and the stop surface 12. Then, the drive assembly can drive the movable member 20 to move to the second position. At this time, the first side of the movable member 20 can stop with the stop surface 12 to clamp the end of the diaphragm 71. Then, the pusher assembly 40 and the cutting assembly 50 can move away from the winding member 10. Then, the drive structure of the winding member 10 can drive the winding member to rotate around its own axis and wind the diaphragm 71 and the electrode 81.

[0124] Since the winding needle device 100 according to the embodiments of the present application has the above technical effects, the winding method according to the embodiments of the present application also has corresponding technical effects, i.e., improving the yield of the winding of the battery cell, preventing the inner circle of the battery cell from collapsing after the battery cell is separated from the winding piece 10, and affecting the performance of the battery cell.

[0125] According to some optional embodiments of the present application, the driving assembly includes a push rod 31, a driving member 32, a push block 33, and a driving roller 34, and the step of controlling the movable piece 20 to move to the first position includes: driving the push rod 31 and the push block 33 connected to the push rod 31 to move along the axial direction of the winding piece 10 by the driving member 32, and the inclined surface 331 of the push block 33 cooperates with the driving roller 34 to drive the movable piece 20 to move to the first position away from the abutting surface 12.

[0126] Specifically, the output end of the driving member 32 can push the push rod 31 to move in the positive direction of the first direction from the end of the push rod 31, so that the push block 33 fixedly connected to the push rod 31 also moves in the positive direction of the first direction, and under the driving of the inclined surface 331 of the push block 33, the driving roller 34 arranged on the movable piece 20 can move downward, so that the movable piece 20 can move to the first position away from the abutting surface 12 against the elastic force of the first elastic member 21, so as to facilitate the to-be-wound piece to be sent into the movable piece 20 and the abutting surface 12. Figure 9

[0127] It should be noted that the push rod 31 and the push block 33 can move along the axial direction of the winding piece 10. That is, the moving direction of the push rod 31 and the push block 33 can be parallel to the axial direction of the winding piece, or can be slightly inclined relative to the axial direction of the winding piece, as long as the movement of the push rod 31 and the push block 33 can ensure that the movable piece 20 abuts against the abutting surface 12.

[0128] In some specific embodiments of the present application, the driving assembly further includes the first elastic member 21, and the step of controlling the movable piece 20 to move to the second position includes: driving the movable piece 20 to move to the second position close to the abutting surface 12 by the first elastic member 21, and the first elastic member 21 abuts the movable piece 20 and the to-be-wound piece against the abutting surface 12.

[0129] Specifically, the output end of the driving member 32 can be separated from the push rod 31, at this time, the first elastic member 21 in the compressed state can naturally expand to drive the movable piece 20 to be close to the abutting surface 12, and the movable piece 20 moves to the second position to abut against the abutting surface 12, at this time, the first elastic member 21 is still in the compressed state, and the first elastic member 21 can abut the movable piece 20 against the abutting surface 12, so as to facilitate the movable piece 20 and the abutting surface 12 to clamp the to-be-wound piece.

[0130] ​While certain embodiments of the application have been described by way of example, it should be appreciated that those skilled in the art can certainly make modifications to the described embodiments without departing from the scope and spirit of the application. The scope of the application is defined in the accompanying claims.

Claims

1. A needle winding device, characterized in that, include: The winding member (10) is rotatable about its own axis. The winding member (10) is recessed inward and has a groove (11) for setting the movable part. The groove (11) has a stop surface (12). The movable part (20) is movably disposed in the groove (11) between a first position and a second position. When the movable part (20) is in the first position, the first side of the movable part (20) is spaced apart from the stop surface (12). When the movable part (20) is in the second position, the first side of the movable part (20) abuts against the stop surface (12). A drive assembly connected to the movable element (20) to drive the movable element (20) to move between the first position and the second position; The movable component (20) includes: Multiple stop portions (24) are spaced apart from the stop surface (12) when the movable member (20) is in the first position, and stop portions (24) abut against the stop surface (12) when the movable member (20) is in the second position.

2. The needle winding device according to claim 1, characterized in that, The movable part (20) further includes a connecting part (23), which is formed as an elongated block extending along the axial direction of the winding part (10), and the length direction of the connecting part (23) is parallel to the axis of the winding part (10); the connecting part (23) is connected to the drive assembly. The plurality of stop portions (24) are spaced apart along the axial direction of the winding member (10) on the connecting portion, and the plurality of stop portions (24) are connected and driven by the connecting portion (23).

3. The needle winding device according to claim 1, characterized in that, The groove (11) is formed as an elongated groove extending along the axial direction of the winding (10); The stop surface (12) extends along the axial direction of the winding (10).

4. The needle winding device according to claim 1 or 3, characterized in that, The groove (11) also has an abutting surface (13), which is arranged opposite to the stop surface (12) and is spaced apart along the circumference of the winding member (10); The movable part (20) is movable between the stop surface (12) and the abutment surface (13), with the first side of the movable part (20) facing the stop surface (12) and the second side of the movable part (20) facing the abutment surface (13).

5. The needle winding device according to claim 2, characterized in that, The first side surface of the connecting part (23) is disposed opposite to the stop surface (12); The stop portion (24) is formed as a protrusion that extends obliquely toward the stop surface (11) relative to the first side surface of the connecting portion (23).

6. The needle winding device according to claim 5, characterized in that, The end face of the protrusion facing the stop surface (11) is formed as an arc-shaped surface (241).

7. The needle winding device according to claim 1, characterized in that, The winding component (10) includes two movable half needles (16), which are arranged opposite to each other, and the outer surface of the movable half needles (16) is an arc-shaped surface.

8. The needle winding device according to claim 7, characterized in that, The two movable half needles (16) can move radially along the winding (10) respectively to change the circumference of the winding surface.

9. The needle winding device according to claim 1, characterized in that, The groove (11) penetrates the two end faces of the winding (10) on its own axis at both ends in the axial direction.

10. The needle winding device according to claim 4, characterized in that, The contact surface (13) is provided with a guide hole, and the needle winding device further includes: Guide member (22), one end of which is located on the second side of the movable member (20), and the guide member (22) is movably located in the guide hole along the axial direction of the guide hole.

11. The needle winding device according to claim 1, characterized in that, The driving component includes: Push rod (31), which is movably disposed within the winding member (10) along the axial direction of the winding member (10); A drive member (32) cooperates with the push rod (31) to drive the push rod (31) to move along the axial direction of the winding member (10); Push block (33), which is connected to push rod (31) and moves synchronously with push rod (31), push block (33) having an inclined surface (331) that extends axially relative to the winding member (10). A drive roller (34) is rotatably disposed on the movable member (20). The outer peripheral surface of the drive roller (34) abuts against the inclined surface (331). The push block (33) cooperates with the drive roller (34) to drive the movable member (20).

12. The needle winding device according to claim 11, characterized in that, The groove (11) also has an abutment surface (13) opposite to the stop surface (12), and the drive assembly further includes: The first elastic element (21) is disposed between the second side of the movable element (20) and the abutting surface (13). The first end of the first elastic element (21) is connected to the second side of the movable element (20), and the second end of the first elastic element (21) is connected to the abutting surface (13). When the movable element (20) is in the second position, the first elastic element (21) squeezes the movable element (20) to press the movable element (20) against the abutting surface (13).

13. A battery cell winding device, characterized in that, include: The needle winding device according to any one of claims 1-12.

14. The cell winding equipment according to claim 13, characterized in that, Also includes: A pusher assembly (40) is disposed near the outer surface of the winding member (10) and is movable to push the member to be wound into the groove (11).

15. The cell winding equipment according to claim 14, characterized in that, The pusher assembly (40) includes: Support (41), said support (41) being movably disposed on the outside of said winding (10); Two stop rollers (42) are spaced apart on the support (41) along the circumferential direction of the winding member (10). The two stop rollers (42) are respectively used to stop the winding member against the outer surface of the winding member (10), and the winding member located between the two stop rollers (42) corresponds to the groove (11).

16. The cell winding equipment according to claim 15, characterized in that, The pusher assembly (40) also includes a movable roller (43), which is movably disposed on the support (41) and located between the two stop rollers (42). The movable roller (43) is used to push the part to be wound into the groove (11).

17. The cell winding equipment according to claim 16, characterized in that, The pusher assembly (40) further includes: A pusher drive (433) is provided on the support (41). Mounting base (431), the first end of which is provided with a movable roller (43) that can rotate around its own axis, the second end of which is rotatably connected to the pusher drive (433), the pusher drive (433) being able to drive the movable roller (43) on the mounting base (431) to extend into or exit the groove (11). The second elastic element (434) is disposed between the mounting base (431) and the pusher drive (433). When the movable roller (43) extends into the groove (11), the second elastic element (434) squeezes the mounting base (431) to press the movable roller (43) against the stop surface (12).

18. The cell winding equipment according to claim 17, characterized in that, The movable part (20) includes a plurality of stop portions (24), and the number of movable rollers (43) is a plurality of, the plurality of movable rollers (43) are spaced apart along the axial direction of the winding part (10), and the plurality of movable rollers (43) and the plurality of stop portions (24) are arranged alternately.

19. The cell winding equipment according to claim 15, characterized in that, Also includes: A cutting assembly (50) is disposed on the support (41) and located between the two stop rollers (42). The cutting assembly (50) is used to cut the part to be wound.

20. The cell winding equipment according to claim 19, characterized in that, The cutting assembly (50) is used to cut the diaphragm between the two stop rollers (42).

21. The cell winding equipment according to claim 19, characterized in that, Also includes: Two protective covers (60) are spaced apart on both sides of the cutting assembly (50), and each of the protective covers (60) is movably connected to the support (41) to be close to or away from the winding member (10).

Images