Follow-up mechanism and battery cell winding equipment

Abstract

The utility model provides a follow-up mechanism and battery cell winding equipment, and the follow-up mechanism comprises a winding needle which is located at a winding station and can continuously rotate; the bearing part can move relative to the winding needle; the follower is connected to the bearing part and can rotate around the axis of the winding needle relative to the bearing part; the connecting structure is connected with the follower and the winding needle and can be switched between a connection state and a disconnection state; when the connection structure is in the connection state, the follower synchronously rotates relative to the bearing part along with the winding needle, and when the connection structure is in the disconnection state, the winding needle rotates relative to the follower and the bearing part. Through the arrangement, the winding needle and the follower can be connected through the connecting structure, the follower synchronously rotates along with the winding needle, the winding needle and the follower can be driven to synchronously rotate only by arranging one power, the structure is simple and reliable, rotation of the follower and the winding needle has good consistency, and control is convenient.

Description

Technical Field

[0001] The present application relates to the field of battery processing technology, and in particular to a follower mechanism and a battery cell winding device. Background Art

[0002] In the battery manufacturing process, the winding of the battery cell is usually completed by a winder, which can stack the positive and negative electrode sheets and two layers of separators in order and wind them to form a battery cell. In the prior art, the winding action of the winder is mostly intermittent, and when the separator is cut, the speed of the material belt is zero. In a winding cycle, the acceleration and deceleration process of the material belt takes a long time, resulting in low winding efficiency.

[0003] In order to achieve continuous winding of the diaphragm, it is first necessary to drive the winding needle to continuously wind, and then it is necessary to drive some structural parts to rotate synchronously with the winding needle so that the diaphragm is switched from one winding needle to another. However, not only is it necessary to set up a servo motor separately for the structural parts, but also multiple servo motors are needed to control so that the structural parts and the winding needle rotate synchronously, which is complex in structure and difficult to control. Utility Model Content

[0004] In view of this, the present application provides a follower mechanism and a battery cell winding device, which have a simple structure and are easy to control.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A follow-up mechanism, comprising:

[0007] The winding needle is in the winding position and can rotate continuously;

[0008] A carrier capable of displacement relative to the winding needle;

[0009] A follower, connected to the carrier and capable of rotating relative to the carrier around the axis of the winding needle;

[0010] A connecting structure connects the follower and the winding needle and is capable of switching between a connected state and a disconnected state; when the connecting structure is in the connected state, the follower rotates synchronously with the winding needle relative to the supporting member, and when the connecting structure is in the disconnected state, the winding needle rotates relative to the follower and the supporting member.

[0011] Optionally include:

[0012] A rotating ring, connected to the carrier, capable of rotating along its own axis relative to the carrier, and capable of being sleeved on the outer side of the winding needle;

[0013] Wherein, the follower is connected to the supporting member through the rotating ring.

[0014] Optionally include:

[0015] An annular track is arranged on the carrier and can be sleeved on the outer side of the winding needle;

[0016] Wherein, the follower is connected to the supporting member through the annular track and can be displaced along the annular track.

[0017] Optionally, the connection structure includes:

[0018] A first connecting portion, disposed on the winding needle and capable of rotating synchronously with the winding needle;

[0019] The second connection part is arranged on the rotating ring and can be displaced to the rotating path of the first connection part, so that the first connection part can drive the second connection part and the rotating ring to rotate synchronously.

[0020] Optionally, the connection structure includes:

[0021] A first connecting portion, disposed on the winding needle and capable of rotating synchronously with the winding needle;

[0022] The second connection part is arranged on the follower and can be displaced to the rotation path of the first connection part, so that the first connection part can drive the second connection part and the follower to rotate synchronously.

[0023] Optionally, the connection structure includes:

[0024] A driving member is arranged on the rotating ring, and a driving end is connected to the second connecting part. The driving member can drive the second connecting part to approach and move away from the winding needle so that the second connecting part enters and exits the rotating path of the first connecting part.

[0025] Optionally, the bearing member can drive the second connecting part to move radially and / or axially along the winding needle, so that the second connecting part enters and exits the rotation path of the first connecting part.

[0026] Optionally include:

[0027] The return structure is arranged on the rotating ring and the bearing member, and can drive the rotating ring to return to an initial position relative to the bearing member.

[0028] Optionally include:

[0029] The return structure is arranged on the follower and the bearing member, and can drive the follower to return to an initial position relative to the bearing member.

[0030] Optionally, the return structure includes:

[0031] A first limiting member, disposed on the bearing member;

[0032] A second limiting member is arranged on the rotating ring;

[0033] The elastic member connects the rotating ring and the bearing member, and can drive the rotating ring to rotate relative to the bearing member, so that the first limiting member limits the second limiting member in an initial state.

[0034] Optionally, the support member is provided with an avoidance groove for the winding needle to extend into; the rotating ring is connected to the avoidance groove and is provided with an avoidance notch for the winding needle to extend into.

[0035] Optionally, the bearing member is configured to be plate-shaped, and the rotating ring is disposed in the avoidance groove.

[0036] Optionally, the follower is configured as a material pressing member and / or a material cutting member and is located on the radial side of the winding needle.

[0037] A battery core winding device comprises a follower mechanism as described in any one of the above items.

[0038] The follower mechanism and battery cell winding equipment provided by the present application have a connecting structure that connects the follower and the winding needle, and can switch between a connected state and a disconnected state to achieve connection and disconnection between the follower and the winding needle. When the connecting structure is in a connected state, the follower is connected to the winding needle, and the follower rotates synchronously with the winding needle relative to the carrier, thereby making the rotational angular velocity of the follower and the winding needle consistent. When the connecting structure is in a disconnected state, the follower is disconnected from the winding needle, the follower does not rotate with the winding needle, and the winding needle rotates relative to the follower and the carrier. With such an arrangement, the winding needle and the follower can be connected through the connecting structure, and the follower rotates synchronously with the winding needle. Only one power is needed to drive the winding needle and the follower to rotate synchronously. The structure is simple and reliable, and the rotation of the follower and the winding needle has good consistency, which is easy to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0040] Figure 1 A three-dimensional view of a follow-up mechanism shown in some embodiments Figure 1 ;

[0041] Figure 2 A three-dimensional view of a follow-up mechanism shown in some embodiments Figure 2;

[0042] Figure 3 A front view of a follower mechanism shown in some embodiments.

[0043] In the figure: 1, winding needle; 2, follower; 3, bearing member; 31, rotating ring; 32, driving member; 33, second connecting part; 34, first connecting part; 35, first limiting member; 36, elastic member; 37, roller. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] like Figure 1-Figure 3 As shown, an embodiment of the present application provides a follower mechanism, including a winding needle 1, a carrier 3, a follower 2 and a connecting structure.

[0046] The winding needle 1 is in the winding needle 1 station, and is used to wind the diaphragm and the pole piece, and the winding needle 1 can rotate continuously to achieve non-stop winding of the winding needle 1 device, thereby improving the winding efficiency. Here, the specific form of non-stop winding of the winding needle 1 is not limited, and it can be through adsorption, clamping or bonding.

[0047] The follower 2 is disposed on the carrier 3 and can be displaced relative to the carrier 3. For example, the follower 2 can be displaced along a preset circular path on the carrier 3. The carrier 3 can be displaced relative to the winding needle 1 so that the carrier 3 and the follower 2 are close to and away from the winding needle 1. Specifically, when the carrier 3 drives the follower 2 to move to the first position close to the winding needle 1, the preset circular path of the follower 2 surrounds the outer circumference of the winding needle 1, that is, the axis of the winding needle 1 is at the center of the preset circular path, so that the follower 2 can rotate around the axis of the winding needle 1.

[0048] The connection structure connects the follower 2 and the winding needle 1, and can be switched between a connection state and a disconnection state to achieve connection and disconnection of the follower 2 and the winding needle 1. When the connection structure is in the connection state, the follower 2 is connected to the winding needle 1, and the follower 2 rotates synchronously with the winding needle 1 relative to the carrier 3, thereby making the rotation angular velocity of the follower 2 and the winding needle 1 consistent. When the connection structure is in the disconnection state, the follower 2 is disconnected from the winding needle 1, the follower 2 does not rotate with the winding needle 1, and the winding needle 1 rotates relative to the follower 2 and the carrier 3.

[0049] With such arrangement, the winding needle 1 and the follower 2 can be connected through the connecting structure, and the follower 2 can rotate synchronously with the winding needle 1. Only one power is needed to drive the winding needle 1 and the follower 2 to rotate synchronously. The structure is simple and reliable, and the rotation of the follower 2 and the winding needle 1 has good consistency, which is convenient for control.

[0050] In some embodiments, the follower mechanism includes a rotating ring 31, which is connected to the carrier 3 and can rotate along its own axis relative to the carrier 3, and the follower 2 is connected to the carrier 3 through the rotating ring 31. When the carrier 3 drives the follower 2 to move to the first position close to the winding needle 1, the rotating ring 31 is sleeved on the outer circumference of the winding needle 1, and the axis of the rotating ring 31 coincides with the axis of the winding needle 1, so that the rotating ring 31 can rotate along the axis of the winding needle 1. Driven by the rotating ring 31, the follower 2 can move relative to the carrier 3 along a preset circular path, and the preset circular path is the rotation path of the rotating ring 31. In this way, the follower 2 is driven to move relative to the carrier 3 in the form of the rotating ring 31, and the structural stability is good, which is conducive to avoiding the change of the movement path of the follower 2 under the action of external force.

[0051] In addition, the follower mechanism may include an annular track, which is arranged on the carrier 3 and can surround the outer side of the winding needle 1. The follower 2 is connected to the carrier 3 through the annular track and can move along the annular track. For example, the annular track is arranged as an annular groove, and the follower 2 is arranged in the annular groove and can slide along the annular groove. When the carrier 3 drives the follower 2 to move to the first position close to the winding needle 1, the annular track is sleeved on the outer periphery of the winding needle 1. At this time, the axis of the annular track coincides with the axis of the winding needle 1. The follower 2 moves along the annular track and can rotate around the axis of the winding needle 1. In this way, by setting the annular track, a preset circular path of the follower 2 can be formed on the carrier 3 to prevent the follower 2 from deflecting during the action.

[0052] Of course, a rotating ring 31 and an annular track may be provided on the carrier 3 , and the rotating ring 31 is connected to the carrier 3 via the annular track, so as to further improve the connection reliability between the rotating ring 31 and the follower 2 .

[0053] In the scheme of the rotating ring 31, the connection structure includes a first connection part 34 and a second connection part 33. The first connection part 34 is arranged on the winding needle 1 and can rotate synchronously with the winding needle 1. The second connection part 33 is arranged on the rotating ring 31 and can be displaced to the rotation path of the first connection part 34, so that the first connection part 34 can drive the second connection part 33 and the rotating ring 31 to rotate synchronously. For example, the first connection part 34 is set as a protrusion protruding from the outer peripheral surface of the winding needle 1. The first connection part 34 rotates with the winding needle 1, and the movement track (i.e., the rotation path) of the first connection part 34 is formed on the outer periphery of the winding needle 1. The second connection part 33 can be set as a protrusion protruding from the inner peripheral surface of the rotating ring 31. The second connection part 33 enters and exits the rotation path of the first connection part 34, so that the connection and disconnection of the first connection part 34 and the second connection part 33 can be realized, and then the connection structure can be switched between the connected state and the disconnected state. In this way, the connection structure is simple and reliable, and easy to control.

[0054] In the scheme of the circular track, the connection structure includes a first connection part and a second connection part. The first connection part is arranged on the winding needle 1 and can rotate synchronously with the winding needle 1. The second connection part is arranged on the follower 2 and can be displaced to the rotation path of the first connection part, so that the first connection part can drive the second connection part and the follower 2 to rotate synchronously. For example, the first connection part is set as a protrusion protruding from the outer peripheral surface of the winding needle 1. The first connection part rotates with the winding needle 1, and the motion track (i.e., the rotation path) of the first connection part is formed on the outer periphery of the winding needle 1. The second connection part can be set as a protrusion protruding from the outer surface of the follower 2. The second connection part enters and exits the rotation path of the first connection part, so that the connection and disconnection of the first connection part and the second connection part can be realized, and then the connection structure can be switched between the connected state and the disconnected state. In this way, the connection structure is simple and reliable, and easy to control.

[0055] In some preferred embodiments, the connection structure further includes a driving member 32. The driving member 32 may be provided with a linear motor or a telescopic cylinder, and has a fixed end and a driving end. The fixed end of the driving member 32 is provided on the rotating ring 31 (or the follower 2) so that the entire driving member 32 is fixed relative to the rotating ring 31 (or the follower 2). The driving end of the driving member 32 is connected to the second connecting portion 33, or the driving member 32 of the driving member 32 is provided as the second connecting portion 33. During the state switching process of the connection structure, the second connecting portion 33 can be driven to approach and move away from the winding needle 1 by controlling the extension and retraction of the driving end of the driving member 32, so that the connection of the connection structure is realized when the second connecting portion 33 enters the rotation path of the first connecting portion 34. In this way, the state of the connection structure is controlled by the driving member 32, with a high degree of automation, and good adjustment sensitivity and timeliness.

[0056] It should be noted that the telescopic direction of the driving end of the driving member 32 can be set to the radial direction of the winding needle 1, or the axial direction of the winding needle 1, or other directions, as long as the rotation path of the second connecting part 33 approaching and moving away from the first connecting part 34 is satisfied.

[0057] In some other preferred solutions, the state switching of the connection structure is realized by the displacement of the carrier 3. The carrier 3 can drive the second connection part 33 to move radially and / or axially along the winding needle 1, so that the second connection part 33 enters and exits the rotation path of the first connection part 34. Specifically, the carrier 3 can drive the second connection part 33 to move radially along the winding needle 1, so that the second connection part 33 can enter the rotation path of the first connection part 34, and the carrier 3 can drive the second connection part 33 to move axially along the winding needle 1, so that the second connection part 33 can leave the rotation path of the first connection part 34. In this way, the state switching of the connection structure is realized by controlling the position of the carrier 3, which is conducive to reducing the amount of driving power and simplifying the structure.

[0058] The displacement of the carrier 3 relative to the winding needle 1 can be driven by a telescopic cylinder or a linear motor, or by a mechanical arm. Here, the movement mode of the carrier 3 is not limited.

[0059] In some embodiments, based on the scheme of the rotating ring 31, the follower mechanism includes a return structure, which is arranged on the rotating ring 31 and the carrier 3, and can drive the rotating ring 31 and the follower 2 to return to the initial state relative to the carrier 3. When the connection structure is switched to the connection state, the winding needle 1 drives the rotating ring 31 and the follower 2 to rotate from the initial position to the first direction until they rotate to the final position, and then the connection structure is switched to the disconnection state, and the return structure drives the rotating ring 31 and the follower 2 to rotate back relative to the carrier 3 (i.e., rotate in the opposite direction of the first direction) until they rotate to the initial position. By setting the return structure, the follower mechanism can be automatically reset, which is conducive to repeated use, without manual adjustment, saving time and effort.

[0060] In addition, based on the scheme of the circular track, the follower mechanism includes a return structure, which is arranged on the follower 2 and the carrier 3, and can drive the follower 2 and the follower 2 to return to the initial state relative to the carrier 3. When the connection structure is switched to the connection state, the winding needle 1 drives the follower 2 to rotate from the initial position to the first direction until it rotates to the final position, and then the connection structure is switched to the disconnection state, and the return structure drives the follower 2 to rotate back relative to the carrier 3 (i.e., rotate in the opposite direction of the first direction) until it rotates to the initial position. By setting the return structure, the follower mechanism can be automatically reset, which is conducive to repeated use, without manual adjustment, saving time and effort.

[0061] The return structure includes a first limiter 35, a second limiter and an elastic member 36, wherein the first limiter 35 is arranged on the bearing member 3, the second limiter is arranged on the rotating ring 31 (or the follower 2), and the elastic member 36 connects the rotating ring 31 (or the follower 2) and the bearing member 3, and can drive the rotating ring 31 (or the follower 2) to rotate relative to the bearing member 3, so that the first limiter 35 limits the second limiter in the initial state. For example, the first limiter 35 is set as a convex block, the second limiter is set as the outer shell of the driving member 32, and the limit is achieved by the contact between the driving member 32 and the convex block, and the elastic member 36 is set as a spring. When the connecting structure switches to the connected state, the winding needle 1 drives the rotating ring 31 and the follower 2 to rotate from the initial position to the first direction. At this time, the elastic member 36 begins to deform and accumulate potential energy; then the connecting structure switches to the disconnected state, the elastic member 36 restores the potential energy and drives the rotating ring 31 and the follower 2 to rotate back relative to the supporting member 3 (that is, rotate in the opposite direction of the first direction) until the first limit member 35 and the second limit member abut to return to the initial position.

[0062] Since the movement direction of the follower 2 is arc-shaped, an arc-shaped guide rod is provided on the carrier 3, and the spring is sleeved in the arc-shaped guide rod to form an elastic member 36. The spring can be guided by the arc-shaped guide rod, thereby improving the structural reliability.

[0063] In some specific solutions, a bypass groove is provided on the carrier 3, and the bypass groove allows the winding needle 1 to enter the inside of the carrier 3 from the outside of the carrier 3. When the carrier 3 drives the follower 2 to move to the first position close to the winding needle 1, the winding needle 1 enters the inside of the bypass groove from the opening of the bypass groove. For example, the inside of the bypass groove is set to be circular, so that the bypass groove is evenly surrounded by the outer circumference of the winding needle 1.

[0064] The rotating ring 31 is connected with the avoidance groove, that is, the inside of the avoidance groove is connected with the rotating ring 31. For example, the outer wall of the rotating ring 31 is arranged on the inner wall of the avoidance groove, or the area surrounded by the rotating ring 31 partially overlaps with the avoidance groove. The rotating ring 31 is provided with an avoidance gap, so that the winding needle 1 can enter the inside of the rotating ring 31 from the outside of the rotating ring 31. When the bearing member 3 drives the follower 2 to move to the first position close to the winding needle 1, the winding needle 1 enters the inside of the rotating ring 31 through the avoidance gap. For example, the rotating ring 31 is set to an arc shape with an angle greater than 240 degrees.

[0065] In this way, due to the setting of the avoidance groove and the avoidance gap, the winding needle 1 can be extended into the interior of the supporting member 3 and the rotating ring 31, so that the follower 2 can rotate around the winding needle 1. Moreover, when the rotating ring 31 rotates relative to the supporting member 3, the rotating ring 31 can pass through the notch of the avoidance groove of the supporting member 3, thereby allowing the follower 2 to circle the winding needle 1 for one circle, thereby improving the movement stability of the follower 2.

[0066] The bearing member 3 is configured in a plate shape, the avoidance groove runs through two opposite side surfaces of the bearing member 3, and the rotating ring 31 is configured inside the avoidance groove, for example, the outer wall of the rotating ring 31 is connected to the inner wall of the avoidance groove. Moreover, the axial dimension of the rotating ring 31 is larger than the axial dimension of the avoidance groove, so that the rotating ring 31 protrudes from the two opposite side surfaces of the bearing member, which is conducive to maintaining the connection and rotation stability of the rotating ring 31 relative to the bearing member 3, and is also conducive to the connection of other components (such as the follower 2, the second connecting portion 33 and the second stopper, etc.). Specifically, the follower 2 is configured on one side of the rotating ring 31, and the second connecting portion 33 and the second stopper are configured on the other side of the rotating ring 31.

[0067] Among them, multiple rollers 37 are rotatably connected to the supporting member 3, and the multiple rollers 37 are arranged around the outer circumference of the rotating ring 31 and are transmission connected to the rotating ring 31. For example, the rollers 37 and the rotating ring 31 are transmission connected by meshing or friction. In this way, the rotating ring 31 and the rollers 37 roll relative to each other, thereby realizing the rotational connection of the rotating ring 31 relative to the supporting member 3.

[0068] It should be noted that the winding needle 1 is divided into a first part and a second part along the axial direction. The first part is used for winding the diaphragm and the pole piece, and the second part is used to connect the first part and the driving power. The radius of the first part is greater than the radius of the second part. The position setting of this follower mechanism is relative to the second part. For example, the first connecting part 34 is arranged on the outer peripheral surface of the second part, and the avoidance groove and the avoidance notch are used for the second part to extend into, and so on.

[0069] In this solution, the follower 2 is configured as a material pressing member and / or a material cutting member, and is arranged on the radial side of the winding needle 1. The material pressing member can be driven by the carrier 3 to approach the winding needle 1 to press the diaphragm against the outer side surface of the winding needle 1 (first part), and the material pressing member is driven by the follower mechanism to rotate around the axis of the winding needle 1 so that the material pressing member and the winding needle 1 rotate synchronously, and the diaphragm can be wound around the outer periphery of the winding needle 1. The material cutting member can be driven by the carrier 3 to approach the winding needle 1 to constrain the diaphragm between the outer side surface of the winding needle 1 (first part) and the material cutting member, and the material pressing member is driven by the follower mechanism to rotate around the axis of the winding needle 1 so that the material pressing member and the winding needle 1 rotate synchronously, and the material cutting member can cut off the diaphragm detached from the winding needle 1.

[0070] The embodiment of the present application provides a battery cell winding device, including the follower mechanism in the above embodiment. With such a configuration, the winding needle 1 and the follower 2 can be connected through the connection structure, and the follower 2 can rotate synchronously with the winding needle 1. Only one power is needed to drive the winding needle 1 and the follower 2 to rotate synchronously. The structure is simple and reliable, and the rotation of the follower 2 and the winding needle 1 has good consistency, which is easy to control.

[0071] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0072] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0073] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0074] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0075] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0076] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A follower mechanism, characterized in that: include: roll The needle is in the winding position and can rotate continuously; A carrier capable of displacement relative to the winding needle; A follower, connected to the carrier and capable of rotating relative to the carrier around the axis of the winding needle; A connecting structure connects the follower and the winding needle and is capable of switching between a connected state and a disconnected state; when the connecting structure is in the connected state, the follower rotates synchronously with the winding needle relative to the supporting member, and when the connecting structure is in the disconnected state, the winding needle rotates relative to the follower and the supporting member.

2. The follower mechanism according to claim 1, characterized in that: include: A rotating ring, connected to the carrier, capable of rotating along its own axis relative to the carrier, and capable of being sleeved on the outer side of the winding needle; Wherein, the follower is connected to the supporting member through the rotating ring.

3. The follower mechanism according to claim 1, characterized in that: include: An annular track is arranged on the carrier and can be sleeved on the outer side of the winding needle; Wherein, the follower is connected to the supporting member through the annular track and can be displaced along the annular track.

4. The follower mechanism according to claim 2, characterized in that: The connection structure comprises: A first connecting portion, disposed on the winding needle and capable of rotating synchronously with the winding needle; The second connection part is arranged on the rotating ring and can be displaced to the rotating path of the first connection part, so that the first connection part can drive the second connection part and the rotating ring to rotate synchronously.

5. The follower mechanism according to claim 3, characterized in that: The connection structure comprises: A first connecting portion, disposed on the winding needle and capable of rotating synchronously with the winding needle; The second connection part is arranged on the follower and can be displaced to the rotation path of the first connection part, so that the first connection part can drive the second connection part and the follower to rotate synchronously.

6. The follower mechanism according to claim 4, characterized in that: The connection structure comprises: A driving member is arranged on the rotating ring, and a driving end is connected to the second connecting part. The driving member can drive the second connecting part to approach and move away from the winding needle so that the second connecting part enters and exits the rotating path of the first connecting part.

7. The follower mechanism according to claim 4, characterized in that: The bearing member can drive the second connecting part to move in the radial direction and / or axial direction of the winding needle, so that the second connecting part enters and exits the rotation path of the first connecting part.

8. The follower mechanism according to claim 2, characterized in that: include: The return structure is arranged on the rotating ring and the bearing member, and can drive the rotating ring to return to an initial position relative to the bearing member.

9. The follower mechanism according to claim 3, characterized in that: include: The return structure is arranged on the follower and the bearing member, and can drive the follower to return to an initial position relative to the bearing member.

10. The follower mechanism according to claim 8, characterized in that: The return structure comprises: A first limiting member, disposed on the bearing member; A second limiting member, arranged on the rotating ring; The elastic member connects the rotating ring and the bearing member, and can drive the rotating ring to rotate relative to the bearing member, so that the first limiting member limits the second limiting member in an initial state.

11. The follower mechanism according to claim 2, characterized in that: The bearing member is provided with an escape groove through which the winding needle extends; the rotating ring is connected with the escape groove and is provided with an escape notch through which the winding needle extends.

12. The follower mechanism according to claim 11, characterized in that: The bearing member is configured to be plate-shaped, and the rotating ring is configured in the avoidance groove.

13. The follower mechanism according to any one of claims 1 to 12, characterized in that: The follower is configured as a material pressing member and / or a material cutting member and is located at the radial side of the winding needle.

14. A battery cell winding device, characterized in that: It comprises the follow-up mechanism described in any one of claims 1-13.

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