Winding method of battery cell winding equipment

Abstract

The invention provides a winding method of battery cell winding equipment, and the winding method comprises the following steps: S1, after a first winding needle finishes winding, a rotating tower rotates, so that a part of a to-be-wound part is expanded by a passing roller of an overturning supporting shaft, and at the moment, the peripheral surface of the passing roller is propped against the part of the to-be-wound part; the other part of the to-be-wound piece conveyed by the two diaphragm conveying assemblies passes through the peripheral side of the second winding needle; s2, the material pushing assembly gets close to a second winding needle; s3, two abutting rollers of the material pushing assembly abut against the two pieces to be wound on the outer surface of the second winding needle, and at the moment, the movable piece is located at the first position and is separated from the abutting face; s4, the to-be-wound part is cut off by the cutting assembly; s5, the material pushing assembly pushes the to-be-wound part into the groove; s6, the movable part is located at the second position, and the first side of the movable part and the abutting face clamp the to-be-wound part; and S7, winding with a second winding needle.

Description

Technical Field

[0001] This application relates to the field of battery cell manufacturing technology, and more specifically, to a winding method for a battery cell winding device. Background Technology

[0002] During the winding process of a battery cell, the end of the separator first needs to be clamped. In existing technology, this is typically achieved using two inner clamping pins located within the winding needle. During clamping, the separator needs to pass through the central seam between the two inner clamping pins. However, when using inner clamping pins to clamp the separator of a large-circumference battery cell, the separator on the inner ring of the cell is prone to collapse after the cell is unwound due to the large diameter of the inner ring, affecting the cell's performance. Summary of the Invention

[0003] One objective of this application is to provide a new technical solution for a needle winding device, which can at least solve the problem of easy collapse of the separator in the inner ring of the battery cell in the prior art.

[0004] Another object of this application is to provide a battery cell winding device, including the above-mentioned winding needle device.

[0005] Another objective of this application is to provide a winding method for a battery cell winding device, the battery cell winding device including a winding needle device and a pushing assembly, the winding needle device including a winding component, a movable component, a diaphragm conveying assembly, a cutting assembly and a turret, a groove is provided on the outer surface of the winding component, the movable component is movably disposed in the groove between a first position and a second position, the winding component includes a first winding needle and a second winding needle, the turret is provided with a first winding needle and a second winding needle, the first winding needle and the second winding needle are spaced apart, a flipping support shaft is provided between the first winding needle and the second winding needle, the diaphragm conveying assembly can convey the component to be wound to the winding component, the cutting assembly is used to cut the component to be wound, and the pushing assembly is movable to push the component to be wound into the groove; The winding method includes: S1: After the first winding is completed, the turret rotates, causing a part of the workpiece to be wound to be opened by the roller of the flip support shaft. At this time, the outer circumference of the roller stops against a part of the workpiece to be wound, and another part of the workpiece to be wound conveyed by the two diaphragm conveying assemblies passes through the periphery of the second winding needle. S2: The feeder assembly is close to the second coil needle; S3: The two stop rollers of the pusher assembly press the two parts to be wound against the outer surface of the second winding needle. At this time, the moving part is in the first position and separated from the stop surface. S4: The cutting assembly cuts the part to be wound; S5: The pusher assembly pushes the workpiece to be wound into the groove; S6: The movable part is in the second position, and the first side of the movable part clamps the part to be wound with the stop surface; S7: Second roll of needle winding.

[0006] Optionally, the groove is formed as an elongated groove extending axially along the winding member, and the stop surface extends axially along the winding member.

[0007] Optionally, the groove further has an abutment surface, which is disposed opposite to the stop surface and spaced apart along the circumference of the winding member. The movable member is movable between the stop surface and the abutment surface, with a first side of the movable member facing the stop surface and a second side of the movable member facing the abutment surface.

[0008] Optionally, the needle winding device further includes a drive assembly connected to the movable member to drive the movable member to move between a first position and a second position.

[0009] Optionally, the driving component includes: A push rod, which is movably disposed within the winding member along the axial direction of the winding member; A driving component, which cooperates with the push rod to drive the push rod to move axially along the winding component; A push block, which is connected to and moves synchronously with the push rod, has an inclined surface that extends axially relative to the winding member; A drive roller is rotatably disposed on the movable member, the outer peripheral surface of the drive roller abuts against the inclined surface, and the push block cooperates with the drive roller to drive the movable member.

[0010] Optionally, the groove further has an abutment surface opposite to the stop surface, and the drive assembly further includes: A first elastic element is disposed between the second side of the movable element and the abutting surface. The first end of the first elastic element is connected to the second side of the movable element, and the second end of the first elastic element is connected to the abutting surface. When the movable element is in the second position, the first elastic element squeezes the movable element to press the movable element against the stop surface.

[0011] Optionally, the contact surface is provided with a guide hole, and the needle winding device further includes: A guide member, one end of which is located on the second side of the movable member, and the guide member is movably disposed in the guide hole along the axial direction of the guide hole.

[0012] Optionally, the drive assembly further includes a first elastic element, and the step of controlling the movable element to move to the second position includes: The first elastic element drives the movable element to move towards the stop surface to the second position, and the first elastic element presses the movable element and the part to be wound against the stop surface.

[0013] Optionally, the movable element includes: A connecting portion, which is formed as an elongated strip-shaped block extending along the axial direction of the winding member, is connected to the drive assembly; Multiple stop portions are spaced apart along the axial direction of the winding member in the connecting portion. When the movable member is in the first position, the stop portions are spaced apart from the stop surface. When the movable member is in the second position, the stop portions abut against the stop surface.

[0014] Optionally, the first side surface of the connecting portion is disposed opposite to the stop surface, and the stop portion is formed as a protrusion extending obliquely toward the stop surface relative to the first side surface of the connecting portion, and the end face of the protrusion toward the stop surface is formed as an arc-shaped surface.

[0015] Optionally, the winding comprises: A fixed half-needle is provided with the groove on its outer surface; Two movable half-needles are respectively located on both sides of the fixed half-needle. The outer surfaces of the two movable half-needles cooperate with the outer surface of the fixed half-needle to form a winding surface for winding the workpiece. Each movable half-needle is movable relative to the fixed half-needle to adjust the circumference of the winding surface.

[0016] Optionally, the pusher assembly is disposed close to the outer surface of the winding.

[0017] Optionally, the pusher assembly includes: A support is movably disposed on the outside of the winding member. Two stop rollers are spaced apart on the support along the circumference of the winding member. The two stop rollers are respectively used to stop the part to be wound against the outer surface of the winding member. A movable roller is movably disposed on the support and located between the two stop rollers. The movable roller is used to push the part to be wound into the groove.

[0018] Optionally, the pusher assembly further includes: A material pushing drive component is disposed on the support; The mounting base has a first end provided with a movable roller that can rotate around its own axis, and a second end of the mounting base is rotatably connected to the pusher drive, which can drive the movable roller on the mounting base to extend into or retract from the groove. A second elastic element is disposed between the mounting base and the pusher drive member. When the movable roller extends into the groove, the second elastic element presses the mounting base to press the movable roller against the stop surface.

[0019] Optionally, the movable member includes multiple stop portions, and the number of movable rollers is multiple. The multiple movable rollers are spaced apart along the axial direction of the winding member, and the multiple movable rollers are arranged alternately with the multiple stop portions.

[0020] Optionally, the cutting assembly is disposed on the support and located between the two stop rollers, and the cutting assembly is used to cut the part to be wound.

[0021] Optionally, the needle winding device further includes: Two protective covers are spaced apart on both sides of the cutting assembly, and each protective cover is movably connected to the support to be closer to or further away from the winding component.

[0022] Optionally, the first coil of needles is finished off while the second coil is being wound.

[0023] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0025] Figure 1 This is a schematic diagram of a state of a needle winding device according to an embodiment of this application; Figure 2 This is a schematic diagram of another state of the needle winding device according to an embodiment of this application; Figure 3 yes Figure 2 Enlarged view of the circled area at point A in the middle; Figure 4 This is a perspective view of the winding member of a needle winding device according to an embodiment of this application; Figure 5 This is a front view of the winding member of a needle winding device according to an embodiment of this application; Figure 6This is a right view of the winding member of a needle winding device according to an embodiment of this application; Figure 7 This is a top view of the winding member of a needle winding device according to an embodiment of this application; Figure 8 It is along Figure 7 Sectional view of the middle BB line; Figure 9 This is a perspective view of a portion of the structure of the drive assembly of a needle winding device according to an embodiment of this application; Figure 10 This is a perspective view of the feeding assembly and cutting assembly of a battery cell winding apparatus according to an embodiment of this application; Figure 11 This is a front view of the feeding assembly and cutting assembly of a cell winding apparatus according to an embodiment of this application; Figure 12 It is along Figure 11 A cross-sectional view of the CC line; Figure 13 This is a left view of the feeding assembly and cutting assembly of a battery cell winding apparatus according to an embodiment of this application; Figure 14 This is a top view of the feeding assembly and cutting assembly of a battery cell winding apparatus according to an embodiment of this application; Figure 15 This is a perspective view of a portion of the structure of the feeding assembly of a battery cell winding device according to an embodiment of this application; Figure 16 This is a perspective view of the cutting assembly and protective cover of a cell winding apparatus according to an embodiment of this application.

[0026] Figure Labels Needle winding device 100; winding component 10; groove 11; stop surface 12; contact surface 13; fixed half needle 15; movable half needle 16; guide rod 161; cam plate 162; cam groove 163; cam 164; third elastic component 165; first needle winding 17; second needle winding 18; movable component 20; first elastic component 21; guide component 22; connecting part 23; stop part 24; arc surface 241; push rod 31; driving component 32; push block 33; inclined surface 331; drive Moving roller 34; pushing assembly 40; support 41; stop roller 42; mounting block 421; fourth elastic element 423; guide rod 424; movable roller 43; mounting base 431; rotating shaft 432; pushing drive component 433; movable end 4331; second elastic element 434; cutting assembly 50; cutter 51; protective cover 60; diaphragm conveying assembly 70; diaphragm 71; electrode conveying assembly 80; electrode 81; turret 90; tilting support shaft 91; guide roller 92. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The needle winding device 100 according to an embodiment of this application will now be described in detail with reference to the accompanying drawings.

[0033] 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.

[0034] 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.

[0035] In other words, the winding device 100 according to the embodiments of this application mainly consists of a winding member 10, a movable member 20, and a drive assembly. The winding member 10 can rotate around its own axis to wind the part to be wound. Optionally, the part to be wound may include a diaphragm 71 and / or an electrode 81, and the diaphragm 71 and the electrode 81 can be stacked and wound into a battery cell on the outer surface of the winding member 10. When the winding member 10 winds the diaphragm 71 and the electrode 81, the diaphragm 71 can be wound first on the outer surface of the winding member 10, and then the electrode 81 and the diaphragm 71 can be stacked and wound. That is, the innermost ring of the battery cell wound on the winding member 10 can be composed of the diaphragm 71.

[0036] A groove 11 may be provided on the outer surface of the winding member 10, and the groove 11 may be recessed toward the interior of the winding member 10. A portion of the inner wall surface of the groove 11 may be formed into a stop surface 12. In addition, a movable member 20 may be provided in the groove 11, and the movable member 20 may move between a first position and a second position within the groove 11.

[0037] Additionally, the movable member 20 can be connected to a drive assembly, which can drive the movable member 20 to move between a first position and a second position. Optionally, the output end of the drive assembly can be connected to the movable member 20, and the input end of the drive assembly can extend outside the winding member 10, so that the movement of the movable member 20 can be controlled from outside the winding member 10 via the drive assembly.

[0038] During the process of winding the workpiece to be wound by the winding member 10, the movable member 20 can be driven to move to a first position by the driving assembly, so that a gap can be formed between the first side of the movable member 20 and the stop surface 12, and the end of the workpiece to be wound can extend into the gap. Then, the movable member 20 can be driven to move from the first position to a second position by the driving assembly, so that the first side of the movable member 20 abuts against the stop surface 12, thereby clamping the end of the workpiece to be wound by the movable member 20 and the stop surface 12. Then, the winding member 10 can rotate to gradually wind the workpiece to be wound onto the outer surface of the winding member 10.

[0039] In other words, by engaging the movable part 20 with the groove 11 on the outer surface of the winding part 10, the end of the part to be wound can be pressed against the winding part 10, so as to fix the end of the part to be wound during the winding process. After the winding part 10 is completed, the battery cell can be unloaded. Since the end of the innermost ring of the battery cell does not need to pass through the middle seam of the two inner clamping pins, but can be stopped by the movable part 20 in the groove 11 of the winding part 10, the inner ring of the part to be wound can be prevented from collapsing during the unloading process when the movable part 20 releases the end of the part to be wound, thus avoiding affecting the performance of the wound battery cell.

[0040] Therefore, according to the embodiment of this application, the winding needle device 100, by providing a groove 11 on the outer surface of the winding member 10, and utilizing the cooperation between the movable member 20 disposed in the groove 11 and the stop surface 12 in the groove 11, can achieve clamping and loosening of the end of the member to be wound, so that the winding member 10 can start winding the member to be wound. By using the movable member 20 to stop the member to be wound in the groove 11 of the winding member 10 before winding the battery cell, the yield of battery cell winding can be improved, and the inner ring of the battery cell can be prevented from collapsing after the battery cell is unloaded from the winding member 10, which would affect the performance of the battery cell.

[0041] Optionally, the winding member 10 can be formed as a cylindrical member, and the outer peripheral surface of the winding member 10 can be used to wind the diaphragm 71 and the electrode 81. The groove 11 can be provided on the outer peripheral surface of the winding member 10. The rotation of the winding member 10 can be driven by a drive structure. For example, the drive structure can drive the winding member 10 to rotate around its own axis by belt transmission.

[0042] According to one embodiment of this application, the groove 11 is formed as an elongated groove extending axially along the winding member 10, and the stop surface 12 extends axially along the winding member 10.

[0043] Specifically, the groove 11 on the outer surface of the winding member 10 can be elongated, and the length direction of the groove 11 can be parallel to the axis of the winding member 10. A portion of the inner wall surface of the groove 11 can extend along the axial direction of the winding member 10 and form a stop surface 12, so that the end of the member to be wound can be fully inserted into the groove 11 and stopped by the movable member 20 on the stop surface 12.

[0044] It should be noted that the groove 11 can extend approximately 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 it can be slightly inclined relative to it. The stop surface 12 can extend along the extension direction of the groove 11. In this case, even if the extension direction of the stop surface 12 is slightly inclined to the axial direction of the winding member 10, it can still cooperate with the movable member 20 to clamp the member to be wound.

[0045] The length of the groove 11 in the axial direction of the winding 10 can be no less than the width of the part to be wound, so as to avoid wrinkles when the part to be wound is inserted into the groove 11. The length of the stop surface 12 in the axial direction of the winding 10 is no less than the width of the part to be wound, so that the stop surface 12 has sufficient area to contact the end of the part to be wound, thus preventing the part to be wound from wrinkling.

[0046] Optionally, the groove 11 can penetrate through the two end faces of the winding member 10 in its own axial direction at both ends, so as to facilitate the observation of the state of the movable member 20 and the part to be wound from the end of the winding member 10, and also facilitate the installation of the movable member 20 and the drive assembly on the winding member 10.

[0047] In this embodiment, by setting the groove 11 and the stop surface 12 to extend along the axial direction of the winding member 10, the stop surface 12 can cooperate with the movable member 20 to clamp the end of the part to be wound and guide the part to be wound to be wound around the circumference of the winding member 10, so as to avoid misalignment and displacement between the part to be wound and the outer surface of the winding member 10, which would affect the accuracy of the winding of the part to be wound.

[0048] Alternatively, the extending direction of the groove 11 may also have an angle with the axial direction of the winding 10. For example, the groove 11 may extend in a spiral shape on the outer surface of the winding 10. The stop surface 12 may extend along the extending direction of the groove 11.

[0049] According to some other embodiments of this application, the groove 11 also has an abutment surface 13, which is disposed opposite to the stop surface 12 and spaced apart along the circumferential direction of the winding member 10. The movable member 20 is movable between the stop surface 12 and the abutment surface 13, with a first side of the movable member 20 facing the stop surface 12 and a second side of the movable member 20 facing the abutment surface 13.

[0050] Specifically, a portion of the inner wall of the groove 11 can be formed as an abutment surface 13, which is opposite to the stop surface 12, and the abutment surface 13 and the stop surface 12 can be spaced apart circumferentially along the winding member 10. For example, the groove 11 can have two sidewalls and a bottom surface, the bottom surface can be connected between the two sidewalls, and the two sidewalls can be spaced apart. One of the two sidewalls can be formed as the stop surface 12, and the other can be formed as the abutment surface 13.

[0051] The movable member 20 can be disposed between the abutting surface 13 and the stop surface 12, and can move between these two surfaces. The side of the movable member 20 facing the stop 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.

[0052] When the movable member 20 is in the first position, the first side of the movable member 20 can be spaced apart from the stop surface 12, and the second side of the movable member 20 can be close to the abutment surface 13. When the movable member 20 is in the second position, the first side of the movable member 20 can abut against the stop surface 12, and the second side of the movable member 20 can be away from the abutment surface 13.

[0053] In this embodiment, by setting an abutting surface 13 opposite to the stop surface 12, and the abutting surface 13 being spaced apart from the stop surface 12 along the circumference of the winding member 10, the movable member 20 can be limited by moving between the two surfaces of the groove 11, thus preventing the movable member 20 from being exposed on the outer surface of the winding member 10 and causing interference to the winding.

[0054] In some specific embodiments of this application, such as Figure 5 and9 As shown, the drive assembly includes: push rod 31, drive member 32, push block 33, drive roller 34 and first elastic member 21.

[0055] Specifically, push rod 31 is movably disposed within winding member 10 along the axial direction of winding member 10. Drive member 32 cooperates with push rod 31 to drive push rod 31 to move along the axial direction of winding member 10. Push block 33 is connected to push rod 31 and moves synchronously with push rod 31. Push block 33 has an inclined surface 331 that extends obliquely relative to the axial direction of winding member 10. Drive roller 34 is rotatably disposed on movable member 20. The outer peripheral surface of drive roller 34 abuts against inclined surface 331. Push block 33 cooperates with drive roller 34 to drive movable member 20.

[0056] In other words, the drive assembly of this embodiment can mainly consist of a push rod 31, a drive member 32, a push block 33, a drive roller 34, and a first elastic member 21. The push rod 31 can pass through the winding member 10, extend approximately along the axial direction of the winding member 10, and move within the winding member 10. The end of the push rod 31 can be connected to the drive member 32, which drives the push rod 31 to move within the winding member 10.

[0057] For example, the first end of the push rod 31 can extend beyond the end of the winding member 10, and the output end of the drive member 32 can be opposite to the end of the winding member 10, driving the push rod 31 to move axially along the winding member 10. Optionally, the drive member 32 can be a drive cylinder, and the output end of the drive cylinder can be a telescopic end. The telescopic end of the drive cylinder can be opposite to the first end of the push rod 31. The telescopic end of the drive cylinder can push the push rod 31 into the winding member 10, or release the push rod 31.

[0058] Additionally, a push block 33 can be fixedly mounted 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 drive of the drive member 32. A portion of the outer surface of the push block 33 can be formed as an 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.

[0059] The movable member 20 may be provided with a drive roller 34, and the drive roller 34 may rotate on the movable member 20. The axis of the drive roller 34 may extend radially along the winding member 10. The inclined surface 331 on the push block 33 may abut against the outer peripheral surface of the drive roller 34.

[0060] Optionally, there can be multiple push blocks 33 and drive rollers 34, and the push blocks 33 and drive rollers 34 can correspond one-to-one. Setting multiple push blocks 33 and multiple drive rollers 34 helps to improve the smoothness of the movement of the moving part 20.

[0061] For ease of explanation, 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 along... Figure 9 When the push block 33 moves in the forward direction as shown in the first direction, it also moves in the forward direction. The push block 33 can push the drive roller 34 to move downward along the inclined surface 331, so that the movable member 20 connected to the drive roller 34 moves away from the stop surface 12. That is to say, the push block 33 and the drive roller 34 cooperate to drive the movable member 20 to move from the second position to the first position.

[0062] In this embodiment, through the cooperation of push rod 31, push block 33, and drive roller 34, the power of drive member 32 can drive movable member 20 from the second position to the first position, causing movable member 20 to separate from stop surface 12. The drive assembly in this embodiment has a simple structure and is located inside the winding member 10, which helps to save installation space and improve the compactness of the needle winding device 100. In addition, by setting drive roller 34 to cooperate with inclined surface 331, the friction force when push block 33 pushes movable member 20 can be reduced, improving the smoothness of movable member 20's movement.

[0063] In some specific embodiments of this application, the drive assembly further includes a first elastic member 21. The first elastic member 21 is disposed between the second side of the movable member 20 and the abutment surface 13. The first end of the first elastic member 21 is connected to the second side of the movable member 20, and the second end of the first elastic member 21 is connected to the abutment surface 13. When the movable member 20 is in the second position, the first elastic member 21 presses the movable member 20 to press the movable member 20 against the stop surface 12.

[0064] Specifically, the movable member 20 can be connected to the abutment surface 13 via a first elastic member 21, which is extendable and retractable in the direction from the abutment surface 13 toward the stop surface 12. The first end of the first elastic member 21 in the extension / retraction direction can be connected to the second side of the movable member 20, and the second end of the first elastic member 21 in the extension / retraction direction can be connected to the abutment 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 abutment surface 13, can be a fixed connection or an abutment connection; no limitation is made here.

[0065] Furthermore, when the movable member 20 moves between the first and second positions, the first elastic member 21 can be in a compressed state. During the movement of the movable member 20 from the second position to the first position, the drive assembly can overcome the elastic force exerted on the movable member 20 by the first elastic member 21, causing the movable member 20 to move away from the stop surface 12. And when the movable member 20 is in the second position, since the first elastic member 21 is in a compressed state, it can press the movable member 20 against the stop surface 12 to clamp the end of the part to be wound.

[0066] 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 toward the stop surface 12, causing the movable member 20 to tend to move toward the stop surface 12. After the drive member 32 can release the push rod 31, the output end of the drive member 32 can be spaced apart from the push rod 31. Under the action of the elastic force of the first elastic member 21, the movable member 20 can move from the first position to the second position, thereby causing the drive roller 34 to move upward along the inclined surface 331, thereby causing the push rod 31 and the push block 33 to move along the inclined surface 331. Figure 9 The first direction of the movement is reversed. And when the movable member 20 is in the second position and abuts against the stop surface 12, the first elastic member 21 in the compressed state can squeeze the movable member 20, so that the movable member 20 applies a clamping force to the stop surface 12 to cooperate with the stop surface 12 to clamp the end of the part to be wound.

[0067] In this embodiment, a first elastic member 21 is provided between the movable member 20 and the abutment surface 13. The first elastic member 21 can drive the movable member 20 to move from a first position to a second position, causing the movable member 20 to abut against the stop surface 12. Therefore, the driving assembly of this embodiment can drive the movable member 20 to move between the first position and the second position. Furthermore, the elastic force of the first elastic member 21, in conjunction with the stop surface 12, can clamp the end of the part to be wound, preventing the part to be wound from loosening and affecting the winding of the part 10.

[0068] According to some optional embodiments of this application, the contact surface 13 is provided with a guide hole, and the needle winding device 100 further includes a guide member 22. One end of the guide member 22 is provided on the second side of the movable member 20, and the guide member 22 is movably provided in the guide hole along the axial direction of the guide hole.

[0069] Specifically, the guide member 22 can extend along the direction of movement of the movable member 20. For example, the abutting surface 13 and the stop 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.

[0070] One end of the guide member 22 can be located within the groove 11 and connected to the second side of the movable member 20. Additionally, the guide member 22 can pass through a guide hole on the abutment surface 13 and can move along the guide hole, which extends along the direction of movement of the movable member 20. The guide member 22 can limit the direction of movement of the movable member 20, improving the stability of the movable member 20 within the groove 11.

[0071] Optionally, the first elastic element 21 can be a spring, which can be sleeved on the outer periphery of the guide element 22 to further improve the stability of the movement of the movable element 20.

[0072] According to other embodiments of this application, such as Figure 4 and Figure 9 As shown, the movable member 20 includes a connecting portion 23 and a plurality of abutment portions 24. Specifically, the connecting portion 23 is formed as an elongated block extending along the axial direction of the winding member 10. The connecting portion 23 is connected to the drive assembly. The plurality of abutment portions 24 are spaced apart along the axial direction of the winding member 10 in the connecting portion 23. When the movable member 20 is in a first position, the abutment portions 24 are spaced apart from the abutment surface 12. When the movable member 20 is in a second position, the abutment portions 24 abut against the abutment surface 12.

[0073] In other words, the movable part 20 in this embodiment can be mainly composed of a connecting part 23 and a plurality of abutting parts 24, wherein the connecting part 23 can be used to connect the plurality of abutting parts 24. The connecting part 23 can be elongated and can extend along the axial direction of the winding part 10. That is, the length direction of the connecting part 23 can be parallel to the axis of the winding part 10.

[0074] Along the length of the connecting portion 23, a plurality of stop portions 24 may be arranged at intervals, and the plurality of stop portions 24 may cooperate with the stop surface 12 to clamp the end of the part to be wound. Specifically, a drive assembly may be connected to the connecting portion 23 to drive the plurality of stop portions 24 to move synchronously through the connecting portion 23. When the movable member 20 is in the first position, each stop portion 24 may be spaced apart from the stop surface 12 to form a gap, so that the end of the part to be wound may extend between the stop portion 24 and the stop surface 12. When the movable member 20 is in the second position, each stop portion 24 may abut against the stop surface 12 to clamp the end of the part to be wound.

[0075] It should be noted that the connecting part 23 can extend approximately along the axial direction of the winding member 10. That is, the extending direction of the connecting part 23 can be parallel to the axial direction of the winding member 10, or it can be slightly inclined relative to it, as long as the connecting part 23 can move within the groove 11 and drive the multiple stop parts 24 to stop against the stop surface 12.

[0076] In this embodiment, by providing multiple stop portions 24, and by connecting and driving the multiple stop portions 24, multiple positions of the end of the part to be wound can be clamped simultaneously when the movable part 20 and the stop surface 12 cooperate to clamp the end of the part to be wound, thereby improving the stability of the part to be wound being clamped and preventing the part to be wound from loosening and affecting the winding process.

[0077] In some specific embodiments of this application, the first side surface of the connecting portion 23 is disposed opposite to the stop surface 12, and the stop portion 24 is formed as a protrusion that extends obliquely toward the stop surface 12 relative to the first side surface of the connecting portion 23, and the end face of the protrusion toward the stop surface 12 is formed as an arc-shaped surface 241.

[0078] Specifically, the side of the connecting portion 23 opposite to the stop surface 12 can be the first side of the connecting portion 23, and the surface of the first side of the connecting portion 23 can be opposite to the stop surface 12. The stop portion 24 can be formed as a protrusion provided on the connecting portion 23. The protrusion can be inclined relative to the first side surface of the connecting portion 23, and the inclination direction of the protrusion can be towards the outside of the opening of the stop surface 12 and the groove 11, so that the stop portion 24 can be closer to the outer surface of the winding member 10. Therefore, when the movable part 20 moves to the second position, the end face of the protrusion facing the stop surface 12 can stop against the stop surface 12, and the first side surface of the connecting part 23 can be spaced apart from the stop surface 12 to avoid the connecting part 23 contacting the end of the part to be wound and causing wrinkling deformation of the part to be wound when the protrusion and the stop surface 12 clamp the end of the part to be wound. At the same time, since the stop part 24 is close to the outer surface of the part to be wound 10, the length of the part to be wound that extends into the groove 11 can be reduced, thereby preventing the inner ring of the wound cell from collapsing.

[0079] In addition, the end face of the bump facing the stop surface 12 can be an arc-shaped surface 241. The end of the part to be wound is stopped on the stop surface 12 by the arc-shaped surface 241, which can protect the end of the part to be wound and prevent the bump from damaging the part and thus affecting the performance of the battery cell.

[0080] According to other embodiments of this application, the winding component 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 disposed 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 component to be wound. Each movable half-needle 16 is movable relative to the fixed half-needle 15 to adjust the circumference of the winding surface.

[0081] Specifically, the fixed half-needle 15 can be connected to a drive structure, which can drive the fixed half-needle 15 to rotate around the axis of the winding member 10. The outer surface of the fixed half-needle 15 can be as follows: Figure 5 The left and right sides are shown, and both sides can be curved. A groove 11 can be provided on the outer surface of the fixed half-needle 15. Specifically, the groove 11 can be provided on the left and / or right sides of the fixed half-needle 15. By the cooperation of the movable part 20 in the groove 11 with the stop surface 12 of the groove 11, the end of the part to be wound can be clamped on the fixed half-needle 15.

[0082] Movable half-needles 16 can be provided on both sides of the fixed half-needle 15, and the fixed half-needle 15 can be located between the two movable half-needles 16. The outer surface of the movable half-needle 16 can be a curved surface, such as... Figure 5As shown, the outer surface of the movable half-needle 16 located 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 located below the fixed half-needle 15 can be the lower side of the movable half-needle 16. The outer surfaces of the fixed half-needle 15 and the movable half-needle 16 can be combined to form a winding surface, and the winding member 10 can wind the part to be wound through the winding surface.

[0083] In addition, the movable half-needle 16 can be movably connected to the fixed half-needle 15. Specifically, the two movable half-needles 16 can move radially along 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 increase; when the movable half-needle 16 moves closer to the fixed half-needle 15, the circumference of the winding member 10 can decrease.

[0084] For example, the movable half-needle 16 can be movably connected to the fixed half-needle 15 via a guide rod 161, which guides the movable half-needle 16 to slide radially along the winding member 10. A cam 164 can be connected to the movable half-needle 16, and a cam plate 162 can be provided within the fixed half-needle 15, and the cam plate 162 is movable relative to the fixed half-needle 15. A cam groove 163 can be provided on the cam plate 162, and the cam 164 can connect to the cam groove 163. One end of the cam plate 162 can extend out of the fixed half-needle 15 and be abutted against the end face of the drive structure of the fixed half-needle 15 by a third elastic element 165, which can be a spring. Under the action of the third elastic element 165, the cam plate 162 can move, and through the cam groove 163 and the cam 164, it drives the movable half-needle 16 to move.

[0085] In this embodiment, movable half-needles 16 are provided on both sides of the fixed half-needle 15, allowing adjustment of the circumference of the winding surface of the winding member 10 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 tabs on the multiple electrode sheets 81 wound by the winding member 10 can be aligned with each other, reducing the positional error between the tabs on each electrode sheet 81. Furthermore, the groove 11 provided on the fixed half-needle 15 allows the member to be wound to be clamped onto the fixed half-needle 15, preventing the movement of the movable half-needles 16 from affecting the fixation of the end of the member to be wound by the winding member 10.

[0086] This application also provides a battery cell winding device, which includes a winding needle device 100 according to any of the above embodiments. Since the winding needle device 100 according to the embodiments of the present invention has the above-described technical effects, the battery cell winding device according to the embodiments of the present application also has corresponding technical effects, namely, improving the yield of battery cell winding and preventing the inner ring of the battery cell from collapsing after the battery cell is unwound from the winding member 10, thus affecting the performance of the battery cell.

[0087] In some specific embodiments of this application, the needle winding device 100 further includes a pusher assembly 40, which 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.

[0088] Specifically, a pusher assembly 40 may be provided near the outer surface of the winding member 10. The pusher assembly 40 can move towards or away from the winding member 10. When the pusher assembly 40 approaches the winding member 10, it can push the end of the member to be wound into the groove 11. When the pusher assembly 40 pushes the end of the member to be wound, the movable member 20 can be in a first position. The pusher assembly 40 can push the end of the member to be wound between the movable member 20 and the stop surface 12, so that the movable member 20 can move from the first position to the second position and cooperate with the stop surface 12 to clamp the end of the member to be wound.

[0089] After the movable part 20 and the stop surface 12 clamp the end of the winding part 10, the pusher assembly 40 can be removed from the groove 11, and then the winding part 10 can begin to wind the part to be wound.

[0090] In this embodiment, by setting the pusher component 40, the part to be wound can be automatically pushed into the groove 11 before the winding of the winding part 10 begins, which is beneficial to improving the winding efficiency of the needle winding device 100.

[0091] According to some optional embodiments of this application, the pusher assembly 40 includes: a support 41, two stop rollers 42 and a movable roller 43.

[0092] Specifically, the support 41 is movably disposed on the outside of the winding member 10, and two stop rollers 42 are spaced apart on the support 41 along the circumference of the winding member 10. The two stop rollers 42 are used to stop the member to be wound against the outer surface of the winding member 10. The movable roller 43 is movably disposed on the support 41 and located between the two stop rollers 42. The movable roller 43 is used to push the member to be wound into the groove 11.

[0093] In other words, the feeding assembly 40 in this embodiment can be mainly composed of a support 41, two stop rollers 42, and a movable roller 43. The support 41 can move towards or away from the winding member 10. The support 41 can be provided with two stop rollers 42 and a movable roller 43, and the stop rollers 42 and the movable roller 43 can move synchronously with the support 41 to move towards or away from the outer surface of the winding member 10.

[0094] Furthermore, when the support 41 is close to the winding member 10, the stop roller 42 can stop the member to be wound against the outer surface of the winding member 10, and the member to be wound located between the two stop rollers 42 can correspond to the groove 11. A movable roller 43 can be provided between the two stop rollers 42, and the movable roller 43 can be connected to the support 41 through a drive structure. The movable roller 43 and the stop roller 42 can rotate on their own. The drive structure can drive the movable roller 43 to extend between the two stop rollers 42 to push the member to be wound into the groove 11.

[0095] The movable roller 43 can extend into the groove 11 when pushing the part to be wound. After the movable roller 43 has finished pushing, the movable part 20 can switch from the first position to the second position to cooperate with the stop surface 12 to clamp the part to be wound. Then the movable roller 43 can be withdrawn from the groove 11 so that the winding part 10 can wind the part to be wound and avoid interference between the movable roller 43 and the part to be wound.

[0096] In this embodiment, by providing two stop rollers 42 on the support 41, a portion of the workpiece to be wound can be pressed against the outer surface of the workpiece 10. This allows the movable roller 43, located between the two stop rollers 42, to push a portion of the workpiece into the groove 11, facilitating the clamping of the workpiece between the movable member 20 and the stop surface 12. Since the movable roller 43 is rotatable, it can roll the end of the workpiece to be wound onto the stop surface 12, allowing the movable member 20 to press the end of the workpiece to be wound against the stop surface 12, preventing wrinkles or damage to the workpiece during the pushing process.

[0097] Optionally, the stop roller 42 and the support 41 can be connected by a mounting block 421, and the stop roller 42 can be rotatably connected to the mounting block 421. The support 41 may be provided with a guide rod 424, and the guide rod 424 is slidable relative to the support 41 in the direction of approaching or moving away from the winding member 10. The mounting block 421 can be installed on the end of the guide rod 424 away from the support 41, and a fourth elastic element 423 can be sleeved on the guide rod 424. The fourth elastic element 423 can be a spring, one end of which can be connected to the mounting block 421, and the other end of which can be connected to the support 41. When the stop roller 42 abuts the member to be wound against the outer surface of the winding member 10, the fourth elastic element 423 can buffer the stop roller 42 to prevent damage to the member to be wound.

[0098] According to other embodiments of this application, the pusher assembly 40 further includes: a pusher drive 433, a mounting base 431, and a second elastic member 434.

[0099] The pusher drive 433 is located on the support 41. The first end of the mounting base 431 is provided with a movable roller 43 that can rotate around its own axis. The second end of the mounting base 431 is rotatably connected to the pusher drive 433. The pusher drive 433 can drive the movable roller 43 on the mounting base 431 to extend into or exit the groove 11. The second elastic member 434 is located between the mounting base 431 and the pusher drive 433. When the movable roller 43 extends into the groove, the second elastic member 434 presses the mounting base 431 to press the movable roller 43 against the stop surface 12.

[0100] Specifically, the pusher drive 433 can be mounted on the support 41. The pusher drive 433 can have a movable end 4331, which can move closer to or further away from the winding member 10. The movable end 4331 of the pusher drive 433 can be connected to a second end of the mounting base 431 to drive the mounting base 431 closer to or further away from the winding member 10. Additionally... The first end of the mounting base 431 can extend toward the winding member 10. The movable roller 43 can be mounted on the first end of the mounting base 431 and can rotate about its own axis. The axis of the movable roller 43 can extend approximately along the axial direction of the winding member 10. When the pusher drive 433 drives the mounting base 431 close to the winding member 10, the movable roller 43 can extend into the groove 11, thereby pushing the material to be wound into the groove 11.

[0101] The second end of the mounting base 431 can be rotatably connected to the movable end 4331 of the pusher drive 433. For example, the second end of the mounting base 431 is hinged to the movable end 4331 of the pusher drive 433 via a rotating shaft 432, so that the movable roller 43 on the mounting base 431 can rotate around the axis of the rotating shaft 432.

[0102] Additionally, a second elastic element 434 can be provided between the second end of the mounting base 431 and the movable end 4331 of the pusher drive 433. The second elastic element 434 can be spaced apart from the rotating shaft 432. When the movable roller 43 extends into the groove 11, it can squeeze the mounting base 431 under the action of the second elastic element 434, so that the movable roller 43 on the mounting base 431 presses better against the stop surface 12 in the groove 11, thereby cooperating with the stop surface 12 to clamp the part to be wound, so that the movable element 20 can cooperate with the stop surface 12 to clamp the part to be wound and prevent the part to be wound from loosening.

[0103] In this embodiment, the movable roller 43 can be inserted into or removed from the groove 11 by the pusher drive 433, so that the movable roller 43 can push the part to be wound into the groove 11. In addition, since the mounting base 431 is rotatably connected to the pusher drive 433 and the two are abutted by the second elastic member 434, the mounting base 431 can float on the pusher drive 433 under the action of the second elastic member 434, so that the movable roller 43 can better fit with the stop surface 12, and maintain a close fit with the part to be wound during the pushing process.

[0104] According to some other embodiments of this application, the movable member 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 being spaced apart along the axial direction of the winding member 10, and the plurality of movable rollers 43 being arranged alternately with the plurality of stop portions 24.

[0105] Specifically, the support 41 may be provided with multiple movable rollers 43, and the multiple movable rollers 43 may be spaced apart along the axial direction of the winding member 10. That is to say, the distribution direction of the multiple movable rollers 43 and the distribution direction of the multiple stop portions 24 may be the same.

[0106] In addition, the multiple movable rollers 43 and the multiple stop portions 24 can be arranged in an alternating manner so that each movable roller 43 can extend into the corresponding two stop portions 24, so that after the movable roller 43 feeds the part to be wound into the groove 11, the stop portion 24 of the movable member 20 can stop the part to be wound on the stop surface 12.

[0107] In some specific embodiments of this application, the needle winding device 100 further includes a cutting component 50, which is disposed on the support 41 and located between two stop rollers 42. The cutting component 50 is used to cut the part to be wound.

[0108] Specifically, the cutting assembly 50 may include a cutter 51, which may be disposed between two stop rollers 42. After the stop rollers 42 stop the workpiece to be wound against the outer surface of the workpiece 10, the cutter 51 of the cutting assembly 50 may cut the workpiece to be wound. After the workpiece to be wound is cut, it may form two ends, one of which may be pushed into the groove 11 by the movable roller 43. Optionally, the cutter 51 may be used to cut the workpiece to be wound by heating.

[0109] According to some optional embodiments of this application, the needle winding device 100 further includes two protective covers 60, which are spaced apart on both sides of the cutting assembly 50. Each protective cover 60 is movably connected to the support 41 to be close to or away from the winding member 10.

[0110] Specifically, protective covers 60 can be provided on both sides of the cutter 51 of the cutting assembly 50. The protective covers 60 can be movably connected to the support 41 through springs and guide structures. When the stop roller 42 stops the workpiece to be wound against the outer surface of the winding workpiece 10, the two protective covers 60 can elastically abut against the workpiece to be wound against the outer surface of the winding workpiece 10 under the action of the springs. As the support 41 continues to approach the winding workpiece 10, the springs connected to the two protective covers 60 can be compressed, so that the cutting assembly 50 can be exposed between the two protective covers 60 to cut the workpiece to be wound.

[0111] In this embodiment, protective covers 60 are provided on both sides of the cutting assembly 50 to protect the cutting assembly 50 and to insulate the cutter 51 in the cutting assembly 50 from heat.

[0112] In some other embodiments of this application, two protective covers 60 can be connected to a protective cover driving structure, which can be mounted on a support 41. When the cutting component 50 needs to cut the workpiece to be wound, the protective cover driving structure can drive the protective covers 60 away from the workpiece to be wound, so that the cutting component 50 can be exposed between the two protective covers 60 to cut the workpiece to be wound.

[0113] Optionally, the needle winding device 100 further includes two diaphragm conveying assemblies 70, two electrode conveying assemblies 80, and a turret 90. The two diaphragm conveying assemblies 70 and the two electrode conveying assemblies 80 are staggered. The diaphragm conveying assemblies 70 can convey diaphragms 71 to the winding member 10, and the electrode conveying assemblies 80 can convey electrodes 81 to the winding member 10.

[0114] The turret 90 may be provided with two winding members 10, which may be spaced apart, and a flip support shaft 91 may be provided between the two winding members 10. The flip support shaft 91 may be located at the rotation center of the turret 90. The flip support shaft 91 may have multiple outwardly extending ends, and each extension end may have a guide roller 92 at its end.

[0115] For ease of explanation, the two winding components 10 can be defined as the first winding needle 17 and the second winding needle 18, respectively. After the first winding needle 17 completes winding, the turret 90 can rotate to the position shown. Figure 1 The position shown allows a portion of the diaphragm 71 conveyed by the two diaphragm conveying assemblies 70 to be spread open by the roller 92 of the flip support shaft 91, with the outer circumferential surface of the roller 92 abutting against a portion of the diaphragm 71, and another portion of the diaphragm 71 conveyed by the two diaphragm conveying assemblies 70 to pass through the periphery of the second coil needle 18.

[0116] Then the pusher assembly 40 can approach the second coil needle 18, forming a shape like... 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.

[0117] 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.

[0118] The winding method of this embodiment will be described in detail below, taking a wound battery cell as an example.

[0119] 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.

[0120] Since the winding device 100 according to the embodiments of the present invention has the above-mentioned technical effects, the winding method according to the embodiments of the present application also has the corresponding technical effects, namely, improving the yield of battery cell winding and preventing the inner ring of the battery cell from collapsing after the battery cell is unloaded from the winding member 10, thus affecting the performance of the battery cell.

[0121] According to some optional embodiments of this application, the drive assembly includes: a push rod 31, a drive member 32, a push block 33, and a drive roller 34. The step of controlling the movable member 20 to move to the first position includes: pushing the push rod 31 and the push block 33 connected to the push rod 31 to move along the axial direction of the winding member 10 by the drive member 32, and the inclined surface 331 of the push block 33 cooperates with the drive roller 34 to drive the movable member 20 to move away from the stop surface 12 to the first position.

[0122] Specifically, the output end of the drive unit 32 can push the push rod 31 along the path shown by the end of the push rod 31. Figure 9 The positive movement in the first direction shown causes the push block 33, which is fixed to the push rod 31, to also move in the positive direction in the first direction. Driven by the inclined surface 331 of the push block 33, the drive roller 34 provided on the movable member 20 can move downward, so that the movable member 20 can overcome the elastic force of the first elastic member 21 and move away from the stop surface 12 to the first position, so that the part to be wound can be fed between the movable member 20 and the stop surface 12.

[0123] It should be noted that push rod 31 and push block 33 can move approximately along the axial direction of the winding member 10. That is, the direction of movement of push rod 31 and push block 33 can be parallel to the axial direction of the winding member, or it can be slightly inclined relative to it, as long as the movement of push rod 31 and push block 33 can ensure that the moving member 20 abuts against the stop surface 12.

[0124] In some specific embodiments of this application, the driving component further includes a first elastic member 21, and the step of controlling the movable member 20 to move to the second position includes: driving the movable member 20 to move towards the stop surface 12 to the second position through the first elastic member 21, and the first elastic member 21 pressing the movable member 20 and the part to be wound against the stop surface 12.

[0125] Specifically, the output end of the drive member 32 can be separated from the push rod 31. At this time, the first elastic member 21, which is in a compressed state, can naturally extend to drive the movable member 20 to approach the stop surface 12, and make the movable member 20 move to the second position and stop the stop surface 12. At this time, the first elastic member 21 is still in a compressed state. The first elastic member 21 can press the movable member 20 against the stop surface 12 so that the movable member 20 and the stop surface 12 can cooperate to clamp the part to be wound.

[0126] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A winding method for a battery cell winding device, characterized in that, The battery cell winding equipment includes a winding needle device and a pushing assembly. The winding needle device includes a winding component, a movable component, a diaphragm conveying assembly, a cutting assembly, and a turret. A groove is provided on the outer surface of the winding component. The movable component is movably disposed in the groove between a first position and a second position. The winding component includes a first winding needle and a second winding needle. The turret is provided with a first winding needle and a second winding needle. The first winding needle and the second winding needle are spaced apart. A flipping support shaft is provided between the first winding needle and the second winding needle. The diaphragm conveying assembly can convey the component to be wound to the winding component. The cutting assembly is used to cut the component to be wound. The pushing assembly is movable to push the component to be wound into the groove. The winding method includes: S1: After the first winding is completed, the turret rotates, causing a part of the workpiece to be wound to be opened by the roller of the flip support shaft. At this time, the outer circumference of the roller stops against a part of the workpiece to be wound, and another part of the workpiece to be wound conveyed by the two diaphragm conveying assemblies passes through the periphery of the second winding needle. S2: The feeder assembly is close to the second coil needle; S3: The two stop rollers of the pusher assembly press the two parts to be wound against the outer surface of the second winding needle. At this time, the moving part is in the first position and separated from the stop surface. S4: The cutting assembly cuts the part to be wound; S5: The pusher assembly pushes the workpiece to be wound into the groove; S6: The movable part is in the second position, and the first side of the movable part clamps the part to be wound with the stop surface; S7: Second roll of needle winding.

2. The winding method according to claim 1, characterized in that, The groove is formed as an elongated groove extending along the axial direction of the winding, and the stop surface extends along the axial direction of the winding.

3. The winding method according to claim 1 or 2, characterized in that, The groove also has an abutting surface, which is disposed opposite to the stop surface and spaced apart along the circumference of the winding member. The movable member is movable between the stop surface and the abutting surface, with a first side of the movable member facing the stop surface and a second side of the movable member facing the abutting surface.

4. The winding method according to claim 1, characterized in that, The needle winding device further includes a drive assembly connected to a movable member to drive the movable member to move between a first position and a second position.

5. The winding method according to claim 4, characterized in that, The driving component includes: A push rod, which is movably disposed within the winding member along the axial direction of the winding member; A driving component, which cooperates with the push rod to drive the push rod to move axially along the winding component; A push block, which is connected to and moves synchronously with the push rod, has an inclined surface that extends axially relative to the winding member; A drive roller is rotatably disposed on the movable member, the outer peripheral surface of the drive roller abuts against the inclined surface, and the push block cooperates with the drive roller to drive the movable member.

6. The winding method according to claim 5, characterized in that, The groove also has an abutment surface opposite to the stop surface, and the drive assembly further includes: A first elastic element is disposed between the second side of the movable element and the abutting surface. The first end of the first elastic element is connected to the second side of the movable element, and the second end of the first elastic element is connected to the abutting surface. When the movable element is in the second position, the first elastic element squeezes the movable element to press the movable element against the stop surface.

7. The winding method according to claim 6, characterized in that, The contact surface is provided with a guide hole, and the needle winding device further includes: A guide member, one end of which is located on the second side of the movable member, and the guide member is movably disposed in the guide hole along the axial direction of the guide hole.

8. The winding method according to claim 5, characterized in that, The drive assembly further includes a first elastic element, and the step of controlling the movable element to move to the second position includes: The first elastic element drives the movable element to move towards the stop surface to the second position, and the first elastic element presses the movable element and the part to be wound against the stop surface.

9. The winding method according to claim 4, characterized in that, The movable component includes: A connecting portion, which is formed as an elongated strip-shaped block extending along the axial direction of the winding member, is connected to the drive assembly; Multiple stop portions are spaced apart along the axial direction of the winding member in the connecting portion. When the movable member is in the first position, the stop portions are spaced apart from the stop surface. When the movable member is in the second position, the stop portions abut against the stop surface.

10. The winding method according to claim 7, characterized in that, The first side surface of the connecting portion is disposed opposite to the stop surface, and the stop portion is formed as a protrusion that extends obliquely toward the stop surface relative to the first side surface of the connecting portion, and the end face of the protrusion toward the stop surface is formed as an arc surface.

11. The winding method according to claim 1, characterized in that, The winding component includes: A fixed half-needle is provided with the groove on its outer surface; Two movable half-needles are respectively located on both sides of the fixed half-needle. The outer surfaces of the two movable half-needles cooperate with the outer surface of the fixed half-needle to form a winding surface for winding the workpiece. Each movable half-needle is movable relative to the fixed half-needle to adjust the circumference of the winding surface.

12. The winding method according to claim 11, characterized in that, The pusher assembly is positioned close to the outer surface of the winding.

13. The winding method according to claim 12, characterized in that, The feeding assembly includes: Support; Two stop rollers are provided, and the support is movably disposed on the outside of the winding. The two stop rollers are spaced apart on the support along the circumference of the winding. The two stop rollers are respectively used to stop the part to be wound against the outer surface of the winding. A movable roller is movably disposed on the support and located between the two stop rollers. The movable roller is used to push the part to be wound into the groove.

14. The winding method according to claim 13, characterized in that, The feeding assembly also includes: A material pushing drive component is disposed on the support; The mounting base has a first end provided with a movable roller that can rotate around its own axis, and a second end of the mounting base is rotatably connected to the pusher drive, which can drive the movable roller on the mounting base to extend into or retract from the groove. A second elastic element is disposed between the mounting base and the pusher drive member. When the movable roller extends into the groove, the second elastic element presses the mounting base to press the movable roller against the stop surface.

15. The winding method according to claim 13, characterized in that, The movable component includes multiple stop portions, and the number of movable rollers is multiple. The multiple movable rollers are spaced apart along the axial direction of the winding component, and the multiple movable rollers and the multiple stop portions are arranged alternately.

16. The winding method according to claim 13, characterized in that, The cutting assembly is disposed on the support and located between the two stop rollers, and the cutting assembly is used to cut the part to be wound.

17. The winding method according to claim 16, characterized in that, The needle winding device also includes: Two protective covers are spaced apart on both sides of the cutting assembly, and each protective cover is movably connected to the support to be closer to or further away from the winding member.

18. The winding method according to claim 1, characterized in that, In step S7, the first coil of needles is finished while the second coil is being wound.

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