Variable-perimeter winding device for battery cell

Abstract

The utility model discloses a variable-perimeter winding device for a battery cell. The variable-perimeter winding device comprises a variable-diameter winding needle assembly, a variable-diameter adjusting assembly, a linkage control assembly and a pole piece diaphragm feeding assembly or a winding needle supporting assembly, the variable-diameter adjusting assembly drives the variable-diameter winding needle assembly to axially move relative to an abutting mechanism and drives a second needle structure of the variable-diameter winding needle assembly to radially move, so that variable-diameter winding is realized; meanwhile, the linkage control assembly is used for controlling the pole piece diaphragm feeding assembly to do corresponding axial movement, so that a pole piece diaphragm material provided by the pole piece diaphragm feeding assembly can adapt to the axial movement of the second needle structure in good time, and poor winding alignment caused by the axial movement of a second needle in the variable-diameter winding process is avoided; or, the winding needle supporting assembly is controlled by the linkage control assembly to do corresponding axial movement, so that the winding needle supporting assembly can avoid the situation that the end part of the winding needle supporting assembly cannot be well supported due to pure radial adjustment of the second needle structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery processing, and particularly relates to a core variable perimeter winding device. Background Art

[0002] With the development of technology, various types of batteries are widely used in consumer products or industrial production. As one of them, the wound battery is widely promoted and used in the industry due to its outstanding advantages in many aspects. The core of the wound battery is processed by a core winding device, which usually unwinds the positive and negative electrode sheets and the separator separately, and then concentrates them on the winding needle assembly for winding to form a wound core.

[0003] The winding needle assembly is the core part of the core winding device. The winding needle assembly generally includes a needle base, a first needle structure and a second needle structure. The first needle structure and the second needle structure are arranged in parallel, and their respective roots are arranged on the needle base; the first needle structure is used to clamp the head of the material (the laminated composite material of the positive electrode sheet, the separator, and the negative electrode sheet), and the second needle structure is located on the radial side of the first needle structure and is used to control the winding radius. In the traditional winding needle assembly, both the first needle structure and the second needle structure are fixedly arranged on the needle base, and the parallel distance between the two cannot be adjusted (i.e., the winding radius cannot be adjusted), so the compatibility and usability are not good. During the winding process of some cores, the quality of the core will also be affected. For example, in the square battery manufactured by the winding process, there are gaps between the layers at the corners, and the inner and outer layer electrode sheets and the separator cannot shrink in proportion, etc., which easily cause the battery to be S-shaped and the inner layer to be wrinkled, affecting the quality of the core.

[0004] To solve the above problems, the industry has developed a variable diameter winding needle assembly, which can flexibly change the parallel distance between the second needle structure and the first needle structure, so as to adjust the winding radius (i.e., the winding perimeter) in a timely manner to adapt to the corresponding processing technology and improve the quality of the core.

[0005] One implementation means of the existing variable diameter winding needle assembly is: a connection mechanism capable of driving the second needle structure to move radially is arranged on the needle base. The connection mechanism has an abutting inclined surface arranged on the side surface of the needle base and forming an angle with the axial direction of the winding needle; at the same time, an abutting mechanism for abutting and cooperating with the abutting inclined surface is arranged outside the needle base. During specific operation, the winding needle assembly is driven to move axially relative to the abutting mechanism, so that different positions of the abutting inclined surface in the axial direction are in abutting and cooperating with the abutting mechanism, so that while the connection mechanism moves, it drives the second needle structure to move radially, so as to realize the second needle structure approaching or departing from the first needle structure.

[0006] The above-mentioned prior art can increase the winding circumference during the winding process, enabling the inner diaphragm electrode to grow under elastic deformation, making the outer electrode diaphragm wound out longer, increasing the flattening space of the inner circle, and thus improving the S-shaped problem of the battery cell. However, when the variable-diameter winding needle assembly changes the winding circumference during the winding process, the winding needle needs to axially move to adjust the radial width (i.e., the winding circumference); however, when the winding needle axially moves, it will drive the wound diaphragm electrode to move axially together, which will result in poor winding alignment and poor winding stability at this time. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide a battery cell variable-circumference winding device, aiming to improve the stability of the variable-diameter winding needle assembly during variable-diameter winding. The present utility model is achieved through the following solutions.

[0008] In the first aspect of the present utility model, a battery cell variable-circumference winding device is provided, including:

[0009] A variable-diameter winding needle assembly, including a needle base and a first needle structure, a second needle structure and a connection mechanism arranged on the needle base. The connection mechanism has a contact inclined surface arranged on the side of the needle base and axially at an angle. When the contact inclined surface bears a contact force, the connection mechanism drives the second needle structure to move radially;

[0010] A variable-diameter adjustment assembly, including an axial drive mechanism for driving the variable-diameter winding needle assembly to move axially and a contact mechanism arranged outside the needle base for contact and cooperation with the contact inclined surface;

[0011] It is characterized in that it further includes:

[0012] An electrode diaphragm feeding assembly, including a feeding assembly plate and an electrode diaphragm feeding roller. The electrode diaphragm feeding roller is axially assembled on the feeding assembly plate, and the feeding assembly plate is arranged to move axially;

[0013] A linkage control assembly, one end is cooperated with the axial drive mechanism or the needle base, and the other end is cooperated with the feeding assembly plate. According to the action of the axial drive mechanism, it controls the feeding assembly plate to move axially synchronously.

[0014] As a preferred technical solution, the linkage control assembly is a linkage mechanism. One end of the linkage mechanism is connected to the drive end of the axial drive mechanism or the needle base, and the other end is connected to the feeding assembly plate.

[0015] As a preferred technical solution, the interlocking control assembly includes an instruction processing module and a feeding and assembling plate driving mechanism connected to the instruction processing module; the axial driving mechanism includes a first driving motor and a first driving lead screw, and the feeding and assembling plate driving mechanism includes a second driving motor and a second driving lead screw; the instruction processing module is connected to the first driving motor, collects the control instruction of the first driving motor and generates a control instruction for the second driving motor; the second driving motor receives the control instruction for the second driving motor and drives the feeding and assembling plate to move axially through the second driving lead screw.

[0016] As a preferred technical solution, the interlocking control assembly includes an instruction processing module, a feeding and assembling plate driving mechanism and a displacement sensor connected to the instruction processing module, and the feeding and assembling plate driving mechanism includes a second driving motor and a second driving lead screw; the displacement sensor senses the displacement information of the needle base moving axially, the instruction processing module collects the displacement information and generates a control instruction for the second driving motor; the second driving motor receives the control instruction for the second driving motor and drives the feeding and assembling plate to move axially through the second driving lead screw.

[0017] As a preferred technical solution, the variable-perimeter winding device for the battery cell further includes a needle support assembly disposed opposite to the variable-diameter needle assembly; a carrying inclined surface adapted to the axial movement and radial movement of the end portion of the second needle structure is provided on the needle support assembly.

[0018] In the technical solution of the first aspect of the present utility model, by providing an interlocking control assembly, when the axial driving mechanism drives the variable-diameter needle assembly to move axially and the abutting inclined surface of the connecting mechanism abuts and cooperates with the abutting mechanism, while driving the second needle structure to move radially, it also drives the pole piece and diaphragm feeding assembly to move axially correspondingly, so that the pole piece and diaphragm materials provided by the pole piece and diaphragm feeding assembly can timely adapt to the axial movement of the second needle structure, and the situation of poor winding alignment will not occur during the variable-diameter winding process.

[0019] In the second aspect of the present utility model, there is also provided a variable-perimeter winding device for a battery cell, including:

[0020] A variable-diameter needle assembly, including a needle base and a first needle structure, a second needle structure and a connecting mechanism disposed on the needle base, the connecting mechanism has an abutting inclined surface disposed on the side surface of the needle base and at an angle to the axis, and when the abutting inclined surface bears an abutting force, the connecting mechanism drives the second needle structure to move radially;

[0021] A variable-diameter adjusting assembly, including an abutting mechanism disposed outside the needle base and an abutting driving mechanism that drives the abutting mechanism to move axially and abuts and cooperates with the abutting inclined surface;

[0022] It is characterized in that it further includes:

[0023] The bobbin support assembly is axially movably arranged opposite to the variable-diameter bobbin assembly and has a mounting inclined surface that accommodates the axial movement and radial movement of the end of the second needle structure.

[0024] The linkage control assembly is cooperated with the abutting drive mechanism at one end and the bobbin support assembly at the other end, and controls the axial synchronous movement of the bobbin support assembly according to the movement of the abutting drive mechanism.

[0025] As a preferred technical solution, when the abutting force of the abutting mechanism acting on the abutting inclined surface causes the connecting mechanism to drive the second needle structure to radially approach the first needle structure, the linkage control assembly controls the bobbin support assembly to axially approach the end of the second needle structure; when the abutting force of the abutting mechanism acting on the abutting inclined surface causes the connecting mechanism to drive the second needle structure to radially move away from the first needle structure, the linkage control assembly controls the bobbin support assembly to axially retreat relative to the end of the second needle structure.

[0026] As a preferred technical solution, the linkage control assembly is a linkage mechanism, one end of the linkage mechanism is connected to the drive end of the abutting drive mechanism, and the other end is connected to the bobbin support assembly.

[0027] As a preferred technical solution, the linkage control assembly includes an instruction processing module and a bobbin support drive mechanism connected to the instruction processing module; the abutting drive mechanism includes a third drive motor and a third drive lead screw, and the bobbin support drive mechanism includes a fourth drive motor and a fourth drive lead screw; the instruction processing module is connected to the third drive motor, collects the control instruction of the third drive motor and generates the control instruction of the fourth drive motor; the fourth drive motor receives the control instruction of the fourth drive motor and drives the bobbin support assembly to move axially through the fourth drive lead screw.

[0028] As a preferred technical solution, the linkage control assembly includes an instruction processing module, a bobbin support drive mechanism and a displacement sensor connected to the instruction processing module; the bobbin support drive mechanism includes a fourth drive motor and a fourth drive lead screw; the displacement sensor senses the displacement information of the abutting mechanism moving axially, the instruction processing module collects the displacement information and generates the control instruction of the fourth drive motor; the fourth drive motor receives the control instruction of the fourth drive motor and drives the bobbin support assembly to move axially through the fourth drive lead screw.

[0029] In the technical solution of the second aspect of the present utility model, by providing a linkage control assembly, when the abutting drive mechanism drives the abutting mechanism to axially move and abut and cooperate with the abutting inclined surface of the connecting mechanism, while driving the second needle structure to radially move, it also drives the needle winding support assembly to axially move, so that the needle winding support assembly can timely and adaptively carry the end of the second needle structure, and cooperate with the variable diameter adjustment assembly to adjust the radial movement of the second needle, avoiding the situation that the end of the second needle structure cannot be well supported due to the simple radial adjustment of the second needle structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 FIG. 6 is a schematic diagram of the basic structure of the core variable perimeter winding device provided in Embodiment 1 of the present utility model.

[0031] Figure 2 FIG. 10 is a schematic diagram of the axial view of the variable diameter needle winding assembly and the pole piece and separator feeding assembly in the core variable perimeter winding device provided in Embodiment 1 of the present utility model.

[0032] Figure 3 FIG. 14 is a schematic diagram of the first specific embodiment of the core variable perimeter winding device provided in Embodiment 1 of the present utility model.

[0033] Figure 4 FIG. 18 is a schematic diagram of the second specific embodiment of the core variable perimeter winding device provided in Embodiment 1 of the present utility model.

[0034] Figure 5 FIG. 22 is a schematic diagram of the third specific embodiment of the core variable perimeter winding device provided in Embodiment 1 of the present utility model.

[0035] Figure 6 FIG. 26 is a schematic diagram of the basic structure of the core variable perimeter winding device provided in Embodiment 2 of the present utility model.

[0036] Figure 7 FIG. 30 is a schematic diagram of the first specific embodiment of the core variable perimeter winding device provided in Embodiment 2 of the present utility model.

[0037] Figure 8 FIG. 34 is a schematic diagram of the second specific embodiment of the core variable perimeter winding device provided in Embodiment 2 of the present utility model.

[0038] Figure 9 FIG. 38 is a schematic diagram of the third specific embodiment of the core variable perimeter winding device provided in Embodiment 2 of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The technical solutions of the embodiments of the present utility model will be explained and described below in conjunction with the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model and not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", "front side", "back side", etc. are all based on the orientation or relative positional relationship shown in the accompanying drawings, aiming to clearly describe the structure of the product or device, and are not used to limit the actual orientation of the product or device during production, use, sales, etc.

[0041] In addition, the terms "first" and "second" are only used for the purpose of distinction in the description, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

[0042] It should be noted that both the axial direction and the radial direction mentioned in the embodiments of the present utility model are based on the rotation axis of the winding needle. That is, the axial direction refers to the direction parallel to the rotation axis of the winding needle, and the radial direction refers to the direction perpendicular to the rotation axis of the winding needle.

[0043] Embodiment 1

[0044] Combined with Figure 1 and Figure 2 As shown, the core variable perimeter winding device 100 provided in this embodiment includes: a variable diameter winding needle assembly 10, a variable diameter adjustment assembly 20, a pole piece and separator feeding assembly 30, and a linkage control assembly 40. Of course, the core variable perimeter winding device 100 also includes a rotation driving assembly (not shown in the figure) for driving the variable diameter winding needle assembly 10 to rotate.

[0045] The variable diameter winding needle assembly 10 includes a needle base 19 and a first needle structure 11, a second needle structure 12, and a connection mechanism 13 provided on the needle base 19. The connection mechanism 13 has an abutting inclined surface 131 provided on the side surface of the needle base 19, and the abutting inclined surface 131 forms an acute angle with the axial direction. When the abutting inclined surface 131 bears an abutting force, the connection mechanism 13 drives the second needle structure 12 to move radially.

[0046] Specifically, the connecting mechanism 13 may include a movable block radially disposed within the needle holder 19. The inner end thereof is connected to the root of the second needle structure 12. The outer end thereof protrudes from the outer wall of the needle holder, and the abutting inclined surface 131 is provided on the outer end. In addition, a reset elastic member is disposed within the needle holder 19, and the reset elastic member applies a force to the connecting mechanism 13 in a direction opposite to the abutting force.

[0047] Continue to refer to Figure 1 , the variable-diameter adjusting assembly 20 includes an axial driving mechanism 21 and an abutting mechanism 22. The axial driving mechanism 21 drives the variable-diameter needle winding assembly 10 to move axially. The abutting mechanism 22 is disposed outside the needle holder 19 and on the same side as the abutting inclined surface 131. When the variable-diameter needle winding assembly 10 moves axially, the abutting inclined surface 131 and the abutting mechanism 22 are in abutting cooperation, so as to press the connecting mechanism 13 to move radially, and then drive the second needle structure 12 to move radially, realizing the variable-diameter operation of the needle winding assembly (i.e., the adjustment of the winding circumference).

[0048] Combined with Figure 1 and Figure 2 As shown, the pole piece and separator feeding assembly 30 includes a feeding assembly plate 31 and a plurality of pole piece and separator feeding rollers 32. The plurality of pole piece and separator feeding rollers 32 are axially assembled on the feeding assembly plate 31 (i.e., assembled perpendicularly to the feeding assembly plate 31). The plurality of pole piece and separator feeding rollers 32 are respectively used to introduce and centrally supply the material 39 (negative pole piece, positive pole piece, separator) to the variable-diameter needle winding assembly 10, and the feeding assembly plate 31 is axially movably arranged.

[0049] One end of the linkage control assembly 40 cooperates with the axial driving mechanism 21 or the needle holder 19, and the other end cooperates with the feeding assembly plate 31. The linkage control assembly 40 controls the feeding assembly plate 31 to move axially synchronously according to the action of the axial driving mechanism 21. Specifically, when the axial driving mechanism 21 drives the variable-diameter needle winding assembly 10 to move Figure 1 to the left (i.e., Figure 2 front center in the figure), the linkage control assembly 40 controls the feeding assembly plate 31 to move synchronously to the left (i.e., Figure 2 front center in the figure), and vice versa, synchronously move Figure 1 to the right (i.e., Figure 2 back center in the figure).

[0050] Combined with Figure 3As shown, as the first specific implementation manner of Embodiment 1, the linkage control component 40 is a linkage mechanism 41 with a pure mechanical structure. One end of the linkage mechanism 41 is connected to the driving end of the axial driving mechanism 21 or the needle base 19, and the other end is connected to the feeding assembly plate 31 of the pole piece diaphragm feeding component 30. In this way, when the axial driving mechanism 21 drives the variable-diameter winding needle component 10 to move axially, the linkage control component 40 controls the feeding assembly plate 31 and the pole piece diaphragm feeding roller 32 thereon to move synchronously, so that when the winding circumference of the variable-diameter winding needle component 10 is adjusted, the displacement caused by the axial driving mechanism 21 is eliminated by the corresponding displacement of the pole piece diaphragm feeding component 30, and the situation of poor winding alignment will not occur during the variable-diameter winding process, improving the winding stability.

[0051] Combined with Figure 4 As shown, as the second specific implementation manner of Embodiment 1, the linkage control component 40 includes an instruction processing module 42 and a feeding assembly plate driving mechanism 43. The feeding assembly plate driving mechanism 43 is connected to the instruction processing module 42; the axial driving mechanism 21 includes a first driving motor and a first driving lead screw (not specifically shown in the figure), and the feeding assembly plate driving mechanism 43 includes a second driving motor and a second driving lead screw (not specifically shown in the figure); the instruction processing module 42 is connected to the first driving motor, collects the control instruction of the first driving motor and generates a control instruction for the second driving motor; the second driving motor receives the control instruction for the second driving motor and drives the feeding assembly plate 31 to move axially through the second driving lead screw.

[0052] Combined with Figure 5 As shown, as the third specific implementation manner of Embodiment 1, the linkage control component 40 includes an instruction processing module 42 and a feeding assembly plate driving mechanism 43 and a displacement sensor 44 connected to the instruction processing module 42; the feeding assembly plate driving mechanism 43 includes a second driving motor and a second driving lead screw (not specifically shown in the figure), the displacement sensor 44 senses the displacement information of the needle base 19 moving axially, and the instruction processing module 42 collects the displacement information and generates a control instruction for the second driving motor; the second driving motor receives the control instruction for the second driving motor and drives the feeding assembly plate 31 to move axially through the second driving lead screw.

[0053] In addition, the battery cell variable circumference winding device 100 provided in Embodiment 1 further includes a winding needle support component 50, which is arranged opposite to the variable-diameter winding needle component 10; a carrying inclined surface 51 adapted to the axial movement and radial movement of the end 121 of the second needle structure 12 is provided on the winding needle support component 50.

[0054] In the core variable perimeter winding device 100 provided in the above-mentioned first embodiment, by providing the linkage control assembly 40, when the axial driving mechanism 21 drives the variable diameter winding needle assembly 10 to move axially and the abutting inclined surface 131 of the connecting mechanism 13 abuts and cooperates with the abutting mechanism 22, while driving the second needle structure 12 to move radially, it also drives the pole piece and separator feeding assembly 30 to move axially accordingly, so that the pole piece and separator materials provided by the pole piece and separator feeding assembly 30 can timely adapt to the axial movement of the second needle structure 12, and the winding alignment will not be poor during the variable diameter winding process.

[0055] Second Embodiment

[0056] As Figure 6 shown, the core variable perimeter winding device 100 provided in this second embodiment includes: a variable diameter winding needle assembly 10, a variable diameter adjustment assembly 60, a linkage control assembly 40, and a winding needle support assembly 50. Of course, the core variable perimeter winding device 100 also includes a rotation driving assembly (not shown in the figure) for driving the variable diameter winding needle assembly 10 to rotate.

[0057] The variable diameter winding needle assembly 10 includes a needle base 19 and a first needle structure 11, a second needle structure 12, and a connecting mechanism 13 provided on the needle base 19. The connecting mechanism 13 has an abutting inclined surface 131 provided on the side surface of the needle base 19, and the abutting inclined surface 131 forms an acute angle with the axis. When the abutting inclined surface 131 bears the abutting force, the connecting mechanism 13 drives the second needle structure 12 to move radially.

[0058] Specifically, the connecting mechanism 13 may include a movable block radially arranged in the needle base 19, the inner end of which is connected to the root of the second needle structure 12, the outer end of which exposes the outer wall of the needle base, and the abutting inclined surface 131 is provided on the outer end. In addition, a reset elastic member is provided in the needle base 19, and the reset elastic member applies a force to the connecting mechanism 13 in a direction opposite to the abutting force.

[0059] Continuing to refer to Figure 6 , the variable diameter adjustment assembly 60 includes an abutting mechanism 62 provided outside the needle base and an abutting driving mechanism 61 for driving the abutting mechanism 62 to move axially and abutting and cooperating with the abutting inclined surface 131. It can be seen that a main difference between this second embodiment and the first embodiment is that: the variable diameter winding needle assembly 10 does not move axially, but the abutting driving mechanism 61 drives the abutting mechanism 62 to move axially, so that the abutting mechanism 62 actively presses the abutting inclined surface 131 of the connecting mechanism 13.

[0060] In addition, in the second embodiment, the bobbin support assembly 50 is axially movably disposed opposite to the variable-diameter bobbin assembly 10, and the bobbin support assembly 50 has a mounting slope 51 that is radially movable to adapt to the end 121 of the second needle structure 12. One end of the linkage control assembly 40 cooperates with the abutment driving mechanism 61, and the other end cooperates with the bobbin support assembly 50. According to the action of the abutment driving mechanism 61, the bobbin support assembly 50 is controlled to move axially synchronously.

[0061] The synchronous movement described in the second embodiment means that when the abutting force of the abutting mechanism 62 acting on the abutting slope 131 causes the connecting mechanism 13 to drive the second needle structure 12 to radially approach the first needle structure 11, the linkage control assembly 40 controls the bobbin support assembly 50 to axially approach the end of the second needle structure 12; when the abutting force of the abutting mechanism 62 acting on the abutting slope 131 causes the connecting mechanism 13 to drive the second needle structure 12 to radially move away from the first needle structure 11, the linkage control assembly 40 controls the bobbin support assembly 50 to axially retreat relative to the end 121 of the second needle structure 12.

[0062] Combined Figure 7 As shown, as the first specific implementation manner of the second embodiment, the linkage control assembly 40 is a link mechanism 45 with a pure mechanical structure. One end of the link mechanism 45 is connected to the driving end of the abutment driving mechanism 61, and the other end is connected to the bobbin support assembly 50. In this way, when the abutment driving mechanism 61 drives the abutment mechanism 62 to axially move, the linkage control assembly 40 drives the bobbin support assembly 50 to move synchronously, so that when the winding circumference of the variable-diameter bobbin assembly 10 is adjusted, the radial displacement of the second bobbin structure 12 is eliminated by the displacement of the mounting slope 51 of the approaching bobbin support assembly 50, and the end 121 of the second bobbin structure 12 is well supported, improving the winding stability.

[0063] Combined Figure 8 As shown, as the second specific implementation manner of the second embodiment, the linkage control assembly 40 includes an instruction processing module 46 and a bobbin support driving mechanism 47 connected to the instruction processing module 46; the abutment driving mechanism 61 includes a third driving motor and a third driving lead screw (not specifically shown in the figure), and the bobbin support driving mechanism 47 includes a fourth driving motor and a fourth driving lead screw (not specifically shown in the figure); the instruction processing module 46 is connected to the third driving motor, collects the control instruction of the third driving motor and generates a control instruction for the fourth driving motor; the fourth driving motor receives the control instruction for the fourth driving motor and drives the bobbin support assembly 50 to move axially through the fourth driving lead screw.

[0064] Combined Figure 9As shown, as the third specific implementation manner of the second embodiment, the linkage control component 40 includes an instruction processing module 46, a bobbin needle support driving mechanism 47 connected to the instruction processing module, and a displacement sensor 48. The bobbin needle support driving mechanism 47 includes a fourth driving motor and a fourth driving lead screw (not specifically shown in the figure). The displacement sensor 48 senses the displacement information of the abutting mechanism 62 moving axially. The instruction processing module 46 collects the displacement information and generates a fourth driving motor control instruction. The fourth driving motor receives the fourth driving motor control instruction and drives the bobbin needle support assembly 50 to move axially through the fourth driving lead screw.

[0065] In the battery cell variable perimeter winding device 100 provided in the above second embodiment, by providing the linkage control component 40, when the abutting driving mechanism 61 drives the abutting mechanism 62 to move axially and abuts and cooperates with the abutting inclined surface 131 of the connecting mechanism 13, while driving the second needle structure 12 to move radially, it also drives the bobbin needle support assembly 50 to move axially, so that the bobbin needle support assembly 50 can timely and adaptively carry the end portion 121 of the second needle structure 12, cooperate with the variable diameter adjusting component to adjust the radial movement of the second needle structure, and avoid the situation that the end portion 121 of the second needle structure 12 cannot be well supported due to the simple radial adjustment of the second needle structure 12, thereby improving the winding stability.

[0066] The above-disclosed are only the preferred embodiments of the present application. Of course, the scope of rights of the present application cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A core variable perimeter winding device, characterized in that Comprising: A variable-diameter winding needle assembly, including a needle base and a first needle structure, a second needle structure and a connecting mechanism arranged on the needle base. The connecting mechanism has a butt slope arranged on the side surface of the needle base and at an angle axially. When the butt slope bears a butt force, the connecting mechanism drives the second needle structure to move radially; A variable-diameter adjusting assembly, including an axial driving mechanism for driving the variable-diameter winding needle assembly to move axially and a butt mechanism arranged outside the needle base for butt-joint cooperation with the butt slope; A pole piece and diaphragm feeding assembly, including a feeding assembly plate and a pole piece and diaphragm feeding roller. The pole piece and diaphragm feeding roller is axially assembled on the feeding assembly plate, and the feeding assembly plate is arranged to move axially; A linkage control assembly, one end of which is cooperated with the axial driving mechanism or the needle base, and the other end of which is cooperated with the feeding assembly plate, and controls the feeding assembly plate to move axially synchronously according to the action of the axial driving mechanism.

2. The cell variable perimeter winding device according to claim 1, characterized in that, The linkage control assembly is a link mechanism, one end of the link mechanism is connected to the driving end of the axial driving mechanism or the needle base, and the other end is connected to the feeding assembly plate.

3. The core variable perimeter winding device according to claim 1, characterized in that, The linkage control assembly includes an instruction processing module and a feeding assembly plate driving mechanism connected to the instruction processing module; the axial driving mechanism includes a first driving motor and a first driving lead screw, and the feeding assembly plate driving mechanism includes a second driving motor and a second driving lead screw; The instruction processing module is connected to the first driving motor, collects the control instruction of the first driving motor and generates the control instruction of the second driving motor; The second driving motor receives the control instruction of the second driving motor and drives the feeding assembly plate to move axially through the second driving lead screw.

4. The cell variable perimeter winding device according to claim 1, characterized in that, The linkage control assembly includes an instruction processing module, a feeding assembly plate driving mechanism and a displacement sensor connected to the instruction processing module; the feeding assembly plate driving mechanism includes a second driving motor and a second driving lead screw; the displacement sensor senses the displacement information of the axial movement of the needle base, the instruction processing module collects the displacement information and generates the control instruction of the second driving motor; the second driving motor receives the control instruction of the second driving motor and drives the feeding assembly plate to move axially through the second driving lead screw.

5. The core variable perimeter winding device according to any one of claims 1 to 4, characterized in that, The battery cell variable perimeter winding device further includes a winding needle support assembly, arranged opposite to the variable-diameter winding needle assembly; the winding needle support assembly is provided with a carrying slope adapted to the axial movement and radial movement of the end of the second needle structure.

6. A core variable perimeter winding device, characterized in that Comprising: A variable-diameter winding needle assembly, including a needle base and a first needle structure, a second needle structure and a connecting mechanism arranged on the needle base. The connecting mechanism has a butt slope arranged on the side surface of the needle base and at an angle with the axis. When the butt slope bears a butt force, the connecting mechanism drives the second needle structure to move radially; A variable-diameter adjusting assembly, including a butt mechanism arranged outside the needle base and a butt driving mechanism for driving the butt mechanism to move axially and butt-joint cooperation with the butt slope; A winding needle support assembly, axially movably arranged opposite to the variable-diameter winding needle assembly, having a carrying slope adapted to the axial movement and radial movement of the end of the second needle structure; The interlocking control component, one end is cooperated with the abutting driving mechanism, and the other end is cooperated with the needle winding support component. According to the action of the abutting driving mechanism, it controls the needle winding support component to move axially synchronously.

7. The core variable perimeter winding device according to claim 6, characterized in that, When the abutting force of the abutting mechanism acting on the abutting inclined surface causes the connecting mechanism to drive the second needle structure to approach the first needle structure radially, the interlocking control component controls the needle winding support component to approach the end of the second needle structure axially; when the abutting force of the abutting mechanism acting on the abutting inclined surface causes the connecting mechanism to drive the second needle structure to move radially away from the first needle structure, the interlocking control component controls the needle winding support component to retreat axially relative to the end of the second needle structure.

8. The device for winding a battery cell with a variable perimeter according to claim 7, wherein, The interlocking control component is a link mechanism, one end of the link mechanism is connected to the driving end of the abutting driving mechanism, and the other end is connected to the needle winding support component.

9. The core variable perimeter winding device according to claim 7, characterized in that, The interlocking control component includes an instruction processing module and a needle winding support driving mechanism connected to the instruction processing module; the abutting driving mechanism includes a third driving motor and a third driving lead screw, and the needle winding support driving mechanism includes a fourth driving motor and a fourth driving lead screw; the instruction processing module is connected to the third driving motor, collects the control instruction of the third driving motor and generates the control instruction of the fourth driving motor; The fourth driving motor receives the control instruction of the fourth driving motor and drives the needle winding support component to move axially through the fourth driving lead screw.

10. The core variable perimeter winding device according to claim 7, characterized in that, The interlocking control component includes an instruction processing module, a needle winding support driving mechanism and a displacement sensor connected to the instruction processing module, and the needle winding support driving mechanism includes a fourth driving motor and a fourth driving lead screw; the displacement sensor senses the displacement information of the abutting mechanism moving axially, the instruction processing module collects the displacement information and generates the control instruction of the fourth driving motor; the fourth driving motor receives the control instruction of the fourth driving motor and drives the needle winding support component to move axially through the fourth driving lead screw.

Images