Battery cell winding mandrel device and battery cell winding apparatus

Abstract

Disclosed in the present application are a battery cell winding mandrel device and a battery cell winding apparatus. The battery cell winding mandrel device comprises: a mounting base (10); an assembly housing (20), which is provided with a first end (21) and a second end (22), the first end (21) being fixedly mounted on the mounting base (10), and the second end (22) being a free end; at least one transmission assembly (30) mounted on the assembly housing (20), each transmission assembly (30) comprising a plurality of transmission components (31), the plurality of transmission components (31) being arranged around the axis of the assembly housing (20); and a plurality of suction shells (40) connected to the corresponding transmission components (31) on a one-to-one basis, the plurality of suction shells (40) being combined to form a cylindrical structure, and the transmission components (31) driving the suction shells (40) to move in the direction perpendicular to the axis of the assembly housing (20), thus expanding or reducing the outer diameter of the cylindrical structure. The application of the present technical solution aims to solve the problem of the difficulty in unloading a bare battery cell from a battery cell winding mandrel device.

Description

Battery cell winding needle device and battery cell winding equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 5, 2024, with application number 2024101673464 and invention name “Battery Cell Winding Needle Device and Battery Cell Winding Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the technical field of battery manufacturing equipment, and in particular relates to a battery cell winding needle device and a battery cell winding device. Background Art

[0003] During the battery production process, the positive electrode sheet, the negative electrode sheet and the insulating separator need to be wound into a bare cell, and then the bare cell needs to be assembled into a battery casing.

[0004] In related technologies, a cell winding device is used to stack and secure the ends of the first insulating separator, positive electrode sheet, second insulating separator, and negative electrode sheet onto the device in the order of stacking. The device then rotates to wind and form a bare cell.

[0005] After the bare cell is formed by the cell winding device, it is wound on the cell winding device and needs to be removed from the device. Since the bare cell is wound, the clamping stress on the cell winding device is applied, making it difficult to remove the bare cell from the device, affecting battery production efficiency.

[0006] Summary of the Invention

[0007] The purpose of the embodiments of the present application is to provide a battery cell winding needle device and a battery cell winding equipment, including but not limited to solving the problem that it is difficult to remove a bare battery cell from the battery cell winding needle device.

[0008] The technical solution adopted in the embodiment of this application is:

[0009] According to a first aspect of the present application, a battery cell winding needle device is provided, comprising:

[0010] Mounting seat;

[0011] The assembly shell is provided with a first end and a second end, the first end is fixedly mounted on the mounting seat, and the second end is a free end;

[0012] At least one transmission assembly is mounted on the assembly shell, the transmission assembly includes a plurality of transmission components, and the plurality of transmission components are arranged around the axis of the assembly shell;

[0013] The plurality of adsorption shells are connected to the transmission components one by one. The plurality of adsorption shells are combined to form a cylinder structure. The transmission components drive the adsorption shells to move along the radial direction of the assembly shell to expand or reduce the outer diameter of the cylinder structure.

[0014] In the process of winding and forming bare cells using the cell winding needle device provided by the present application, before winding the positive electrode sheet, the negative electrode sheet, and the diaphragm, the transmission components of the transmission assembly drive each adsorption shell to move and expand outward to the inner diameter required by the bare cell, and each adsorption shell is fixed, and then winding and forming is performed to obtain the bare cell. The bare cell is wound on the adsorption shell of the cell winding needle device, and then the transmission components of the transmission assembly drive each adsorption shell to move to reduce the outer diameter of the tube structure, so that the bare cell and the adsorption shell are loosened from each other, and then the bare cell can be easily and quickly removed from the free end of the cell winding needle device, reducing the difficulty of removing the bare cell from the cell winding needle device, thereby improving the unloading efficiency of the bare cell from the cell winding needle device, and thus improving the production efficiency of new energy batteries.

[0015] In some embodiments of the present application, the transmission assembly further includes a push rod member. The assembly housing is hollow, and the push rod member is slidably mounted within the assembly housing. The push rod member is drivingly connected to each transmission member, and the push rod member slides along the axis of the assembly housing to drive the transmission members. The push rod member simultaneously controls the movement of each transmission member to expand or contract the outer diameter of the cylindrical structure formed by each adsorption housing, resulting in a simple and rapid driving process.

[0016] In some embodiments of the present application, each transmission assembly includes two transmission members, each having a first connection end and a second connection end. The first connection end is connected to a push rod member, and the adsorption shells are connected to the two second connection ends one by one. The direction of the transmission members from the first connection end to the second connection end is perpendicular to the axial direction of the assembly shell, and the direction of one transmission member from the first connection end to the second connection end is opposite to the direction of the other transmission member from the first connection end to the second connection end. The push rod member is used to simultaneously control the movement of the two transmission members to expand or reduce the outer diameter of the cylindrical structure composed of the two adsorption shells, and the driving process is simple and fast.

[0017] In some embodiments of the present application, the push rod component includes a push rod body and a drive shaft structure installed on the push rod body. The push rod body can be slidably installed in the assembly shell, and the axis of the drive shaft structure is perpendicular to the axis of the push rod body. Furthermore, the assembly shell is provided with a first assembly hole, and the first connecting end is provided with a second assembly hole. The extension direction of the second assembly hole is inclined relative to the axis direction of the assembly shell. The drive shaft structure passes through the first assembly hole and the second assembly hole in sequence. The sliding of the push rod body drives the drive shaft structure to slide in the first assembly hole and the second assembly hole, and the inclination direction of the second assembly hole of one transmission component is opposite to the inclination direction of the second assembly hole of the other transmission component. By the relative sliding of the drive shaft structure in the second assembly hole, the transmission component is driven to move, thereby expanding or reducing the outer diameter of the cylindrical structure composed of the two adsorption shells. The driving process is simple and fast.

[0018] In some embodiments of the present application, the drive shaft structure includes a pin and a roller. The pin is mounted on the push rod body, and the roller is rotatably mounted on the end of the pin, and the roller is located in the second assembly hole. The roller rolls relative to the strip-shaped planar wall of the second assembly hole, thereby reducing frictional resistance and enabling the drive shaft structure to smoothly drive the transmission member to move.

[0019] In some embodiments of the present application, an inclination of an extension direction of the second assembly hole relative to an axial direction of the assembly shell is between 1:20 and 1:5.

[0020] In some embodiments of the present application, the outer wall of the assembly housing is provided with a plurality of guide grooves, the first assembly hole being formed at the bottom of each guide groove, and the transmission member being slidably mounted in the guide grooves. The side walls of the guide grooves constrain the transmission member, preventing it from moving along the axis of the assembly housing. The guide grooves guide the transmission member, allowing it to move stably along the guide grooves.

[0021] In some embodiments of the present application, each transmission member includes a first section, a second section, and a third section connected in sequence. The first and third sections are positioned opposite each other, each section defines a second assembly hole, and the first and third sections are positioned in two opposing guide grooves, with the second section connected to the adsorption housing. The U-shaped transmission member formed by the first, second, and third sections helps optimize the volume of the battery cell winding needle device and achieve a compact structural design.

[0022] In some embodiments of the present application, the transmission assembly further includes a servo drive mechanism mounted on a mounting base, with an output end of the servo drive mechanism drivingly connected to an end of the push rod body proximate to the mounting base. By driving the push rod body via the servo drive mechanism, the outer diameter of the cylindrical structure formed by the two adsorption shells can be automatically adjusted during the process of winding the bare battery cell, thereby reducing worker workload and improving production efficiency.

[0023] In some embodiments of the present application, the battery cell winding device includes multiple transmission assemblies, with adjacent transmission assemblies spaced apart. The multiple transmission assemblies simultaneously drive the movement of the various adsorption shells, allowing each adsorption shell to more stably and quickly expand or contract the outer diameter of the cylindrical structure it comprises.

[0024] In some embodiments of the present application, an air cavity is formed in the adsorption housing. The adsorption housing has a curved sidewall and end sidewalls connected to both ends of the curved sidewall. The curved sidewall has a first air hole, and the end sidewall of the adsorption housing near the mounting base has a second air hole. Both the first and second air holes are connected to the air cavity. By utilizing the vacuum adsorption principle for adsorption and fixing, operation is simple, fast, and stable, which helps improve production efficiency.

[0025] In some embodiments of the present application, multiple adsorption housings are arranged in a one-to-one relationship. An integrated air path mechanism is fixedly mounted on the sidewall of the adsorption housing near the mounting base. The integrated air path mechanism communicates with the air cavity and is further connected to a vacuum pipeline. The integrated air path mechanism provides auxiliary centralized vacuuming of the air cavity of the adsorption housing, thereby improving the efficiency of the vacuum pipeline in evacuating the air cavity of the adsorption housing.

[0026] In some embodiments of the present application, the curved side walls of each adsorption shell are provided with an avoidance groove, and the two ends of the avoidance groove respectively pass through the two end side walls, so that the unloading clamp arm can be smoothly inserted into the inner hole of the bare battery cell, so that the bare battery cell can be quickly unloaded from the battery cell winding needle device to complete the unloading.

[0027] According to the second aspect of the present application, a battery cell winding device is provided. Specifically, the battery cell winding device includes a battery cell winding needle device as described above. In the process of winding and forming a bare battery cell, before winding the positive electrode sheet, the negative electrode sheet, the first insulating diaphragm and the second insulating diaphragm, the transmission component of the transmission assembly drives each adsorption shell to move outward to the inner diameter required by the bare battery cell, and each adsorption shell is fixed, and then winding and forming is performed to obtain a bare battery cell. The bare battery cell is wound on the adsorption shell of the battery cell winding needle device, and then the transmission component of the transmission assembly drives each adsorption shell to move to reduce the outer diameter of the tube structure, thereby eliminating the clamping stress between the bare battery cell and each adsorption shell, that is, the bare battery cell and the adsorption shell are loosened from each other, and then the bare battery cell can be easily and quickly removed from the free end of the battery cell winding needle device, reducing the difficulty of removing the bare battery cell from the battery cell winding needle device, thereby improving the unloading efficiency of the bare battery cell from the battery cell winding needle device, and thus improving the production efficiency of new energy batteries.

[0028] In some embodiments of the present application, the battery cell winding device further includes a slide rail, a bracket, and a material unloading drive mechanism, wherein the slide rail is mounted on a horizontal mounting surface, the bracket can be slidably mounted on the slide rail, the material unloading drive mechanism is mounted on the horizontal mounting surface, and the material unloading drive mechanism is connected to the bracket to drive the bracket to slide along the slide rail, and the mounting base is fixedly mounted on the bracket. After the bare battery cell is obtained by winding and the transmission component drives the adsorption shell to move to reduce the outer diameter of the cylindrical structure composed of the adsorption shell, the material unloading drive mechanism drives the bracket to slide along the slide rail, so that the battery cell winding needle device quickly detaches from the bare battery cell, completing the unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] FIG1 is a schematic structural diagram of a battery cell winding needle device in the related art for winding a positive electrode sheet, a negative electrode sheet, a first insulating separator, and a second insulating separator;

[0031] FIG2 is a schematic diagram of the assembly structure of the battery cell winding needle device according to an embodiment of the present application;

[0032] FIG3 is a second schematic diagram of the assembly structure of the battery cell winding needle device according to an embodiment of the present application;

[0033] FIG4 is a schematic front view of the battery cell winding needle device shown in FIG3 along the S direction;

[0034] FIG5 is a schematic diagram of the assembly structure of the transmission component and the mounting base of the battery cell winding needle device according to an embodiment of the present application;

[0035] FIG6 is an exploded schematic diagram of FIG5 ;

[0036] FIG7 is an enlarged schematic diagram of point A in FIG6 ;

[0037] FIG8 is a first structural diagram of an adsorption housing of a battery cell winding needle device according to an embodiment of the present application;

[0038] FIG9 is a second structural schematic diagram of the adsorption shell of the battery cell winding needle device according to an embodiment of the present application.

[0039] Among them, the reference numerals in the figures are:

[0040] 1. Existing battery cell winding needle device; 2. First insulating diaphragm; 3. Positive electrode sheet; 4. Second insulating diaphragm; 5. Negative electrode sheet;

[0041] 10. Mounting seat;

[0042] 20. Assembly shell; 21. First end; 22. Second end; 23. First assembly hole; 24. Guide groove;

[0043] 30. Transmission assembly; 31. Transmission member; 311. First connecting end; 3111. Second assembly hole; 312. Second connecting end; 313. First section; 314. Second section; 315. Third section; 32. Push rod member; 321. Push rod body; 322. Drive shaft structure; 3221. Pin; 3222. Roller;

[0044] 40. Adsorption shell; 41. Arc side wall; 411. First air hole; 412. Avoidance groove; 42. End side wall; 421. Second air hole; 43. Shell bottom; 431. Accommodation groove;

[0045] 50. Gas circuit integration mechanism;

[0046] 60. Vacuum pipe. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit this application.

[0048] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0049] In order to illustrate the technical solution provided by this application, a detailed description is given below with reference to specific drawings and embodiments.

[0050] In the production process of new energy batteries, it is necessary to wind the positive electrode sheet, the negative electrode sheet and the insulating separator into a bare cell. In the related art, as shown in FIG1 , a cell winding needle device 1 is used to wind the positive electrode sheet 3, the negative electrode sheet 5, the first insulating separator 2 and the second insulating separator 4 into a bare cell. As shown in FIG1 , according to the stacking order of the first insulating separator 2, the positive electrode sheet 3, the second insulating separator 4 and the negative electrode sheet 5, the staff respectively fix the ends of the first insulating separator 2, the positive electrode sheet 3, the second insulating separator 4 and the negative electrode sheet 5 to the cell winding needle device 1, and then the cell winding needle device 1 rotates, driving the first insulating separator 2, the positive electrode sheet 3, the second insulating separator 4 and the negative electrode sheet 5 to move, thereby winding and forming a bare cell. Moreover, after the cell winding needle device winds and forms the bare cell, the bare cell is wound on the cell winding needle device, so the bare cell needs to be removed from the cell winding needle device. However, during the winding process to obtain the bare cell, the positive and negative electrode sheets and insulating separator are wound one by one on the cell winding needle device. This causes the bare cell to exert clamping stress on the cell winding needle device. Due to the clamping stress exerted by the bare cell on the cell winding needle device, the staff needs to find ways to overcome this clamping stress in order to remove the bare cell from the cell winding needle device and complete the unloading. This makes it difficult to remove the bare cell from the cell winding needle device, affecting the unloading efficiency and, in turn, the production efficiency of new energy batteries.

[0051] Based on the above considerations, in order to be able to conveniently and quickly remove the bare battery cells obtained by winding from the battery cell winding needle device to quickly complete the unloading, the embodiment of the present application is designed to provide a new type of battery cell winding needle device, and the battery cell winding needle device is assembled to obtain a battery cell winding device for winding and forming the bare battery cells. In the battery cell winding needle device provided by the embodiment of the present application, the transmission component of the transmission assembly drives each adsorption shell to move to reduce the outer diameter of the tube structure composed of multiple adsorption shells, thereby eliminating the clamping stress between the bare battery cell and each adsorption shell, so that the bare battery cell can be easily and quickly removed from the free end of the battery cell winding needle device to complete the unloading, which helps to improve the unloading efficiency of the bare battery cell and correspondingly improves the production efficiency of new energy batteries.

[0052] As shown in Figures 2 to 6, the battery cell winding device provided in the embodiment of the present application includes a mounting base 10, an assembly shell 20, at least one set of transmission components 30, and a plurality of adsorption shells 40. In this embodiment, a set of transmission components 30 is used as an example for description. The assembly shell 20 is provided with a first end 21 and a second end 22. The first end 21 is fixedly mounted on the mounting base 10, and the second end 22 is a free end. The transmission component 30 is mounted on the assembly shell 20. The transmission component 30 includes a plurality of transmission members 31. The plurality of transmission members 31 are arranged around the axis of the assembly shell 20. The plurality of adsorption shells 40 are arranged one-to-one corresponding to the plurality of transmission members 31. Each adsorption shell 40 is connected to each transmission member 31. The plurality of adsorption shells 40 are combined to form a cylindrical structure. The transmission member 31 drives the adsorption shell 40 to move in a direction perpendicular to the axis of the assembly shell 20 to expand or reduce the outer diameter of the cylindrical structure.

[0053] The mounting base 10 serves as the main support structure, providing support for the entire battery cell winding device. The first end 21 of the assembly shell 20 is bolted to the mounting base 10 (alternatively, the first end 21 can be welded to the mounting base 10). The second end 22 of the assembly shell 20 serves as the free end of the battery cell winding device. Furthermore, the transmission member 31 is capable of driving the suction housing 40 to move perpendicular to the axis of the assembly shell 20. In other words, the transmission member 31 drives the suction housing 40 to move radially along the assembly shell 20.

[0054] In the process of winding and forming bare cells using the cell winding needle device designed and provided by the present application, before winding the positive electrode sheet 3, the negative electrode sheet 5, the first insulating diaphragm 2 and the second insulating diaphragm 4, the transmission member 31 of the transmission assembly 30 drives each adsorption shell 40 to move and expand outward to the inner diameter required for the bare cell, and each adsorption shell 40 is fixed, and then winding and forming is performed to obtain the bare cell. The bare cell is wound on the adsorption shell 40 of the cell winding needle device, and then the transmission member 31 of the transmission assembly 30 drives each adsorption shell 40 to move to reduce the outer diameter of the tube structure, thereby eliminating the clamping stress between the bare cell and each adsorption shell 40, that is, the bare cell and each adsorption shell 40 are separated from each other, and then the bare cell can be easily and quickly removed from the free end of the cell winding needle device, reducing the difficulty of removing the bare cell from the cell winding needle device, thereby improving the unloading efficiency of the bare cell from the cell winding needle device, and thus improving the production efficiency of new energy batteries.

[0055] Moreover, in the embodiment of the present application, each adsorption shell 40 is fixed by adsorption of the first insulating diaphragm 2 covering the adsorption shell 40 (in the embodiment of the present application, the first insulating diaphragm 2, the positive electrode sheet 3, the second insulating diaphragm 4, and the negative electrode sheet 5 are stacked and wound in the stacking order to obtain a bare cell. Of course, other stacking orders can also be used, which are not limited here), and then the winding operation is performed. After the bare cell is obtained by winding, it is only necessary to stop adsorbing the first insulating diaphragm 2 and reduce the outer diameter of the tube structure to separate the each adsorption shell 40 from the bare cell. The operation is convenient and effective, which helps to improve the production efficiency of new energy batteries.

[0056] In some embodiments of the present application, when the incoming material wound on the battery cell winding needle device is a composite incoming material that has been completed, the transmission component 31 of the transmission assembly 30 drives each adsorption shell 40 to move to reduce the outer diameter of the tube structure, thereby conveniently and quickly achieving the misalignment adjustment of adjacent pole ears during the winding process (the relative misalignment between the pole ears on different winding layers and the pole ears on adjacent winding layers).

[0057] Among them, the composite material means that before the battery cell winding needle device is used to carry out the winding process of winding the bare battery cell, the first insulating separator 2, the positive electrode sheet 3, the second insulating separator 4, and the negative electrode sheet 5 are stacked and compounded together to form an integral composite material.

[0058] As shown in Figures 5 to 7, in some embodiments of the present application, the transmission assembly 30 further includes a push rod member 32, the assembly shell 20 is hollow, and the push rod member 32 can be slidably installed in the assembly shell 20. In addition, the push rod member 32 is driven and connected to each transmission member 31, and the push rod member 32 slides along the axial direction of the assembly shell 20 to drive the transmission member 31 to move in a direction perpendicular to the axis of the assembly shell 20, thereby driving the adsorption shell 40 to move in a direction perpendicular to the axis of the assembly shell 20 to expand or reduce the outer diameter of the tube structure. In this way, the outer diameter of the tube structure formed by the adsorption shell 40 can be conveniently adjusted according to the actual inner diameter size required by the bare battery cell. In this embodiment, the push rod member 32 simultaneously controls the movement of each transmission member 31 to achieve the expansion or reduction of the outer diameter of the tube structure composed of each adsorption shell 40, and the driving process is simple and fast.

[0059] In some embodiments of the present application, as shown in Figures 5 and 6, each transmission assembly 30 includes two transmission members 31, each having a first connection end 311 and a second connection end 312. Accordingly, the number of adsorption shells 40 in the battery cell winding needle device is two, and the two adsorption shells 40 are relatively combined to form a cylindrical structure. During assembly, the two first connection ends 311 of the two transmission members 31 are respectively connected to the push rod member 32, and the two adsorption shells 40 are respectively connected to the two second connection ends 312 of the two transmission members 31. The direction of the transmission members 31 from the first connection end 311 to the second connection end 312 is perpendicular to the axial direction of the assembly shell 20. Furthermore, the direction of one transmission member 31 from the first connection end 311 to the second connection end 312 is opposite to the direction of the other transmission member 31 from the first connection end 311 to the second connection end 312 (the direction from the first connection end 311 to the second connection end 312 is the direction of arrow K shown in Figure 6). That is, when the push rod member 32 moves along its axis, it drives the transmission member 31 to move from the first connection end 311 to the second connection end 312, thereby driving the adsorption housing 40 to move perpendicular to the axis of the assembly shell 20, thereby expanding or contracting the outer diameter of the tubular structure. In this embodiment, the push rod member 32 simultaneously controls the movement of the two transmission members 31 to expand or contract the outer diameter of the tubular structure formed by the two adsorption housings 40, resulting in a simple and rapid driving process.

[0060] In some embodiments, each group of transmission components 30 corresponds to two adsorption shells 40, and multiple groups of transmission components 30 correspond to multiple adsorption shells 40. For example, two groups of transmission components 30 correspond to four adsorption shells 40, and so on. Multiple adsorption shells 40 are surrounded and combined to form a cylindrical structure.

[0061] In some embodiments of the present application, as shown in Figures 6 and 7 , the push rod member 32 includes a push rod body 321 and a drive shaft structure 322 mounted on the push rod body 321. The push rod body 321 is slidably mounted within the assembly housing 20, with the axis of the drive shaft structure 322 being perpendicular to the axis of the push rod body 321. Furthermore, the assembly housing 20 is provided with a first assembly hole 23, and the first connecting end 311 is provided with a second assembly hole 3111. The second assembly hole 3111 extends in an oblique direction relative to the axis of the assembly housing 20. It should be noted that the second assembly hole 3111 extends in a direction perpendicular to the axis of the drive shaft structure 322. In other words, the second assembly hole 3111 is elongated in its extension direction, i.e., in the direction of its maximum dimension. Accordingly, the first assembly hole 23 is also elongated, and its extension direction is parallel to the axis of the assembly housing 20. The drive shaft structure 322 sequentially passes through the first and second assembly holes 23 and 3111. The push rod body 321 slides, driving the drive shaft structure 322 within the first and second assembly holes 23 and 3111. Because the second assembly hole 3111 extends at an angle relative to the axis of the assembly shell 20, the drive shaft structure 322 drives the transmission member 31 to move from the first connection end 311 to the second connection end 312, thereby driving the adsorption housing 40 to move perpendicular to the axis of the assembly shell 20, thereby expanding or contracting the outer diameter of the tubular structure. Furthermore, the inclination of the second assembly hole 3111 of one transmission member 31 is opposite to the inclination of the second assembly hole 3111 of the other transmission member 31. Thus, the two transmission members 31 each drive their corresponding adsorption housings 40 toward each other, thereby contracting the outer diameter of the tubular structure formed by the two adsorption housings 40; alternatively, the two transmission members 31 each drive their corresponding adsorption housings 40 away from each other, thereby expanding the outer diameter of the tubular structure formed by the two adsorption housings 40. In this embodiment, the driving shaft structure 322 slides relatively in the second assembly hole 3111, thereby driving the transmission member 31 to move, thereby expanding or reducing the outer diameter of the cylindrical structure composed of the two adsorption shells 40, and the driving process is simple and fast.

[0062] In some embodiments of the present application, as shown in FIG7 , the drive shaft structure 322 includes a pin 3221 and a roller 3222. The pin 3221 is fixedly mounted on the push rod body 321, and the roller 3222 is rotatably mounted on the end of the pin 3221. The roller 3222 is located in the second assembly hole 3111. When the push rod body 321 moves along the axis of the assembly shell 20, the pin 3221 moves synchronously with the push rod body 321 in the first assembly hole 23, and the roller 3222 moves relatively in the second assembly hole 3111. The roller 3222 rolls relative to the strip-shaped planar hole wall of the second assembly hole 3111, thereby reducing frictional resistance. This allows the drive shaft structure 322 to smoothly drive the transmission member 31 to move, thereby expanding the outer diameter of the cylindrical structure formed by the two adsorption shells 40.

[0063] In some embodiments of the present application, the inclination of the extension direction of the second assembly hole 3111 relative to the axial direction of the assembly shell 20 is between 1:20 and 1:5. For example, the inclination can be 1:20, 1:15, 1:10, 1:5, etc. Thus, the distance each transmission member 31 moves from the first connection end 311 to the second connection end 312 can be calculated based on the distance the push rod body 321 moves along the axial direction of the assembly shell 20, thereby determining the extent to which the outer diameter of the cylindrical structure formed by the two adsorption shells 40 has been expanded or reduced. Inclination refers to the degree of tilt or skewness of an object or inclined surface, and is typically expressed as the tangent function of the angle between the object or inclined surface and a reference object. In this embodiment, the inclination of the extension direction of the second assembly hole 3111 relative to the axial direction of the assembly shell 20 is the ratio of the radial distance the adsorption shell 40 moves along the assembly shell 20 to the distance the push rod body 321 moves along the axial direction of the assembly shell 20. The calculation process is: Assuming that the moving distance of the push rod body 321 along the axis direction of the assembly shell 20 is x1, and assuming that the outer diameter of the cylindrical structure composed of the two adsorption shells 40 is expanded or reduced by x2, and the inclination is 1:5, then Among them, x1 is the specific distance value obtained through actual measurement, and x2 is calculated from it.

[0064] In some embodiments of the present application, each transmission member 31 may be powered by a corresponding motor secured within the assembly housing 20. A transmission structure, such as a rack-and-pinion structure or a screw-nut assembly, is provided between the motor and the transmission member 31. In this manner, the motor outputs power, which, through the transmission structure, drives the transmission member 31 to move, thereby expanding the outer diameter of the cylindrical structure formed by the two adsorption housings 40.

[0065] In other embodiments of the present application, each transmission member 31 may be powered by a corresponding air cylinder or oil cylinder. The piston rod of the air cylinder or oil cylinder is extended and retracted, thereby directly driving the transmission member 31 to move, thereby expanding the outer diameter of the cylindrical structure composed of the two adsorption shells 40.

[0066] In some other embodiments of the present application, the module for providing power to each transmission component 31 can also be composed of a motor, a driving gear, a driven gear, and a transmission belt wrapped around the driving gear and the driven gear. During assembly, the rotating shaft of the battery is connected to the driving gear, the motor is fixed in the assembly shell 20, and the driving gear and the driven gear are both installed in the assembly shell 20, the driving gear and the driven gear are spaced apart, the transmission component 31 is fixedly connected to the transmission belt, and the connection position of the transmission belt and the transmission component 31 is located between the driving gear and the driven gear. In this way, the motor drives the driving gear to rotate, which in turn drives the transmission belt to move, and the transmission component 31 moves synchronously with the transmission belt to expand the outer diameter of the cylindrical structure composed of the two adsorption shells 40.

[0067] As shown in FIG6 , the outer wall of the assembly shell 20 is provided with a plurality of guide grooves 24. The first assembly hole 23 is formed at the bottom of the guide groove 24, and the transmission member 31 is slidably mounted in the guide groove 24. When the push rod body 321 moves along the axis of the assembly shell 20, the roller 3222 moves relatively within the second assembly hole 3111. At this time, the side walls of the guide groove 24 restrict the transmission member 31, preventing the transmission member 31 from moving along the axis of the assembly shell 20. Under the guidance of the guide groove 24, the transmission member 31 moves along the guide groove 24 (i.e., the transmission member 31 is driven to move in the direction from the first connecting end 311 to the second connecting end 312), allowing the transmission member 31 to move stably, thereby driving the adsorption shell 40 to move stably in a direction perpendicular to the axis of the assembly shell 20, thereby expanding or reducing the outer diameter of the cylindrical structure.

[0068] In some embodiments of the present application, as shown in FIG6 , each transmission member 31 includes a first section 313, a second section 314, and a third section 315, which are sequentially connected. The first section 313 and the third section 315 are arranged relative to each other. That is, the transmission member 31 forms a U-shaped structure with the first section 313, the second section 314, and the third section 315. The assembly shell 20 is located between the first section 313 and the third section 315, which helps optimize the volume of the battery cell winding needle device and achieve a miniaturized structural design. The first section 313 and the third section 315 are each provided with a second assembly hole 3111, and the first section 313 and the third section 315 are respectively located in two opposing guide grooves 24. The second section 314 is fixed to the adsorption shell 40 via bolts.

[0069] In some embodiments of the present application, the transmission assembly 30 also includes a servo drive mechanism (not shown). Specifically, the servo drive mechanism is fixedly mounted on the mounting base 10, and the output end of the servo drive mechanism is drive-connected to one end of the push rod body 321 close to the mounting base 10. The output end of the servo drive mechanism drives the push rod body 321 to move back and forth along the axial direction of the assembly shell 20. Then, the two transmission components 31 respectively drive the corresponding adsorption shells 40 to move toward each other to reduce the outer diameter of the tube structure composed of the two adsorption shells 40, or the two transmission components 31 respectively drive the corresponding adsorption shells 40 to move away from each other to expand the outer diameter of the tube structure composed of the two adsorption shells 40. By driving the push rod body 321 through the servo drive mechanism, the outer diameter of the tube structure composed of the two adsorption shells 40 can be automatically adjusted during the process of winding the bare battery cell, thereby reducing the workload of the staff and helping to improve production efficiency.

[0070] In some embodiments of the present application, as shown in Figures 5 and 6 , the battery cell winding device includes multiple sets of transmission assemblies 30, with two adjacent sets of transmission assemblies 30 spaced apart along the axis of the assembly shell 20. These multiple sets of transmission assemblies 30 simultaneously drive the movement of each adsorption shell 40, enabling each adsorption shell 40 to more stably and quickly expand or reduce the outer diameter of the cylindrical structure it comprises. In this embodiment, the battery cell winding device is equipped with two sets of transmission assemblies 30 spaced apart, each set of transmission assemblies 30 including two transmission components 31, as shown in Figures 5 and 6 .

[0071] In some embodiments of the present application, each adsorption shell 40 is formed with an air cavity. In addition, as shown in Figures 8 and 9, each adsorption shell 40 has a curved side wall 41 and an end side wall 42 connected to both ends of the curved side wall 41. The curved side wall 41 is provided with a first air hole 411, and the end side wall of the adsorption shell 40 close to the mounting seat 10 is provided with a second air hole 421. The first air hole 411 and the second air hole 421 are both connected to the air cavity, and the second air hole 421 is connected to the vacuum pipe 60. During the process of winding the bare battery cell, air is evacuated through the vacuum pipe 60, so that the air cavity of the adsorption shell 40 forms a negative pressure relative to the external atmospheric pressure, and the first insulating diaphragm 2 covering the first air hole 411 of the adsorption shell 40 is adsorbed and fixed, and then the winding operation is performed. In this embodiment, by utilizing the vacuum adsorption principle to adsorb and fix the first insulating diaphragm 2, the operation is simple and fast, and the adsorption is stable, which helps to improve production efficiency.

[0072] In some embodiments of the present application, each adsorption housing 40 further comprises a housing bottom 43. The housing bottom 43, the curved sidewalls 41, and the two end sidewalls 42 collectively form the adsorption housing 40. As shown in FIG9 , the housing bottom 43 is provided with a receiving groove 431 for accommodating the assembly shell 20. Therefore, when the outer diameter of the cylindrical structure formed by the two adsorption housings 40 is at its minimum, the housing bottoms 43 of the two adsorption housings 40 contact each other, and the assembly shell 20 is accommodated within the two receiving grooves 431 of the two adsorption housings 40.

[0073] In some embodiments of the present application, in order to improve the vacuum duct 60's efficiency in pumping air into the air cavity of the adsorption shell 40, as shown in Figures 2 to 4, the battery cell needle winding device further includes a plurality of air path integration mechanisms 50. The plurality of air path integration mechanisms 50 correspond one-to-one to the plurality of adsorption shells 40. The air path integration mechanisms 50 are fixedly mounted on the end side wall of the adsorption shell 40 near the mounting seat 10. The air path integration mechanisms 50 are connected to the air cavity through a plurality of second air holes 421, and the air path integration mechanisms 50 are connected to the vacuum duct 60. The air path integration mechanism performs auxiliary centralized vacuum pumping on the air cavity of the adsorption shell 40, thereby improving the efficiency of the vacuum duct 60 in pumping air into the air cavity of the adsorption shell 40.

[0074] As shown in Figures 4, 8, and 9, the curved sidewalls 41 of each adsorption housing 40 are provided with escape grooves 412, with the ends of the escape grooves 412 respectively extending through the two end sidewalls 42. The escape grooves 412 are used to accommodate the unloading clamp arms, allowing them to be smoothly inserted into the inner holes of the bare battery cells. The unloading clamp arms then support the bare battery cells, allowing them to be quickly unloaded from the battery cell winding device, completing the unloading process.

[0075] According to another aspect of the present application, a battery cell winding device is designed and provided. Specifically, the battery cell winding device includes the aforementioned battery cell winding needle device. In the process of winding and forming a bare battery cell, before winding the positive electrode sheet 3, the negative electrode sheet 5, the first insulating diaphragm 2 and the second insulating diaphragm 4, the transmission member 31 of the transmission assembly 30 drives each adsorption shell 40 to move and expand outward to the inner diameter required by the bare battery cell, and each adsorption shell 40 is fixed, and then winding and forming is performed to obtain a bare battery cell. The bare battery cell is wound on the adsorption shell 40 of the battery cell winding needle device, and then the transmission member 31 of the transmission assembly 30 drives each adsorption shell 40 to move to reduce the outer diameter of the tube structure, thereby eliminating the clamping stress between the bare battery cell and each adsorption shell 40, that is, the bare battery cell loosens each adsorption shell 40, and then the bare battery cell can be easily and quickly removed from the free end of the battery cell winding needle device, thereby improving the unloading efficiency of the bare battery cell from the battery cell winding needle device, thereby improving the production efficiency of new energy batteries.

[0076] In some embodiments of the present application, the battery cell winding equipment designed and provided by the present application further includes a slide rail, a bracket and a feeding drive mechanism, the slide rail is mounted on a horizontal mounting surface (generally, the horizontal mounting surface is the floor of a production workshop), the bracket can be slidably mounted on the slide rail, the feeding drive mechanism is mounted on the horizontal mounting surface, and the feeding drive mechanism is connected to the bracket to drive the bracket to slide along the slide rail, and the mounting seat 10 is fixedly mounted on the bracket. After the bare battery cell is obtained by winding, the unloading clamp arm is inserted into the inner hole of the bare battery cell along the avoidance groove 412, and then the transmission member 31 drives the adsorption shell 40 to move to reduce the outer diameter of the tube structure composed of the adsorption shell 40, and then the feeding drive mechanism drives the bracket to slide along the slide rail, and then drives the battery cell winding needle device to move together, so that the battery cell winding needle device quickly detaches from the bare battery cell, that is, the bare battery cell quickly detaches from the free end of the battery cell winding needle device relative to the battery cell winding needle device, thereby completing the feeding. Then, the unloading clamp arm transports the bare battery cell to the next production station for corresponding processing operations, such as the bare battery cell clamping and molding station for clamping and molding the bare battery cell (a processing station set after the winding processing station in the square battery production process), and the tab trimming station for trimming the tab (a processing station set after the winding processing station in the cylindrical battery production process), etc.

[0077] The above are merely optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A battery core winding needle device, characterized in that: include: Mounting seat; An assembly shell, the assembly shell having a first end and a second end, the first end being fixedly mounted on the mounting seat, and the second end being a free end; At least one transmission assembly is mounted on the assembly shell, wherein the transmission assembly includes a plurality of transmission members, and the plurality of transmission members are arranged around the axis of the assembly shell; A plurality of adsorption shells are connected to the respective transmission components in a one-to-one correspondence. The plurality of adsorption shells are combined to form a cylinder structure. The transmission components drive the adsorption shells to move along the radial direction of the assembly shell to expand or reduce the outer diameter of the cylinder structure.

2. The battery core winding needle device according to claim 1, characterized in that: The transmission assembly also includes a push rod component. The assembly shell is hollow and the push rod component can be slidably installed in the assembly shell. The push rod component is drivingly connected to each of the transmission components and slides along the axial direction of the assembly shell to drive the transmission components.

3. The battery core winding needle device according to claim 2, characterized in that: Each group of the transmission components includes two transmission components, and the transmission components include a first connecting end and a second connecting end. The first connecting end is connected to the push rod component, and the adsorption shell is connected to the two second connecting ends one by one. The direction of the transmission component from the first connecting end to the second connecting end is perpendicular to the axial direction of the assembly shell, and the direction of one of the transmission components from the first connecting end to the second connecting end is opposite to the direction of the other transmission component from the first connecting end to the second connecting end.

4. The battery core winding needle device according to claim 3, characterized in that: The push rod component includes a push rod body and a drive shaft structure installed on the push rod body. The push rod body can be slidably installed in the assembly shell. The axis of the drive shaft structure is perpendicular to the axis of the push rod body.

5. The battery core winding needle device according to claim 4, characterized in that: The assembly shell is provided with a first assembly hole, the first connecting end is provided with a second assembly hole, the extension direction of the second assembly hole is inclined relative to the axial direction of the assembly shell, the drive shaft structure passes through the first assembly hole and the second assembly hole in sequence, the push rod body slides and drives the drive shaft structure to slide in the first assembly hole and the second assembly hole, and the inclination direction of the second assembly hole of one of the transmission components is opposite to the inclination direction of the second assembly hole of the other transmission component.

6. The battery core winding needle device according to claim 5, characterized in that: The driving shaft structure includes a pin and a roller. The pin is mounted on the push rod body. The roller is rotatably mounted on the end of the pin, and the roller is located in the second assembly hole.

7. The battery core winding needle device according to any one of claims 5-6, characterized in that: The inclination of the extending direction of the second assembly hole relative to the axial direction of the assembly shell is between 1:20 and 1:

5.

8. The battery core winding needle device according to any one of claims 5 to 7, characterized in that: The outer side wall of the assembly shell is provided with a plurality of guide grooves, and the first assembly hole is opened at the bottom of the guide groove. The transmission component is slidably installed in the guide groove.

9. The battery core winding needle device according to claim 8, characterized in that: Each of the transmission components includes a first section, a second section and a third section connected in sequence, the first section and the third section are arranged opposite to each other, the first section and the third section are both provided with the second assembly hole, and the first section and the third section are respectively located in two opposite guide grooves, and the second section is connected to the adsorption shell.

10. The battery core winding needle device according to any one of claims 5 to 9, characterized in that: The transmission assembly further comprises a servo drive mechanism, which is mounted on the mounting seat. An output end of the servo drive mechanism is drivingly connected to an end of the push rod body close to the mounting seat.

11. The battery core winding needle device according to any one of claims 1 to 10, characterized in that: The battery core winding needle device includes multiple groups of transmission components, and two adjacent groups of transmission components are arranged at intervals.

12. The battery core winding needle device according to any one of claims 1 to 11, characterized in that: The adsorption shell forms an air cavity, the adsorption shell has a curved side wall and an end side wall connected to both ends of the curved side wall, the curved side wall is provided with a first air hole, and the end side wall of the adsorption shell close to the mounting seat is provided with a second air hole, and the first air hole and the second air hole are both connected to the air cavity.

13. The battery core winding needle device according to claim 12, characterized in that: The battery cell winding needle device also includes multiple air path integrated mechanisms, which correspond one-to-one to the multiple adsorption shells. The air path integrated mechanisms are fixedly installed on the end side wall of the adsorption shell close to the mounting seat. The air path integrated mechanism is connected to the air cavity and is connected to the vacuum pipe.

14. The battery core winding needle device according to any one of claims 12-13, characterized in that: The arcuate side wall of each adsorption shell is provided with an avoidance groove, and the two ends of the avoidance groove respectively pass through the two end side walls.

15. A battery core winding device, characterized in that: It comprises the battery core winding needle device as described in any one of claims 1 to 14.

16. The battery cell winding device according to claim 15, characterized in that: The battery cell winding equipment also includes a slide rail, a bracket and a material unloading drive mechanism. The slide rail is installed on a horizontal mounting surface. The bracket can be slidably installed on the slide rail. The material unloading drive mechanism is installed on the horizontal mounting surface. The material unloading drive mechanism is connected to the bracket to drive the bracket to slide along the slide rail. The mounting seat is fixedly installed on the bracket.

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