Battery cell synchronous winding mechanism

Abstract

The utility model relates to the field of winding mechanisms, in particular to a battery cell synchronous winding mechanism which comprises a base and a bottom plate, a first winding device and a second winding device which are oppositely distributed are respectively arranged on the base and the bottom plate, and a winding station and a discharging station are formed on the first winding device and the second winding device. Winding assemblies are arranged on the first winding device and the second winding device, a rotating fluted disc is connected to the first winding device, a first ejector pin assembly and a first pin pulling assembly are arranged on the base, and a second ejector pin assembly and a second pin pulling assembly are arranged on the bottom plate. According to the embodiment, the first linkage assembly and the second linkage assembly are arranged on the base, meanwhile, the winding assembly on the discharging station is effectively driven by the first needle pulling assembly and the second needle pulling assembly to contract and synchronously pull and move away from the two ends of the workpiece, and smooth discharging of the workpiece is conveniently completed through two-way pulling; and the influence of pulling of the winding assembly on workpiece damage is reduced, so that the production efficiency and the production quality are improved.

Description

Technical Field

[0001] The utility model relates to the field of winding mechanisms, in particular to a core synchronous winding mechanism. Background Art

[0002] As a core component in battery manufacturing, the core electrode sheet is widely used in multiple fields such as batteries, power tools, and electric vehicles. And as an important part of lithium batteries, lithium batteries are widely used, including but not limited to many civil and military fields such as mobile phones, laptops, and tablets. With the rapid development of the new energy industry, the demand for the core electrode sheet inside lithium batteries is increasing day by day, and the requirements for its manufacturing process and quality are also increasing day by day.

[0003] In the process of core manufacturing, the winding of the core electrode sheet is a crucial link. The existing core electrode sheet winding mechanism mainly includes a winding machine, a winding needle, an electrode sheet feeding device, and a control system, etc. The winding machine drives the winding needle to rotate, and at the same time, the electrode sheet feeding device feeds the positive electrode sheet, the separator, and the negative electrode sheet into the space between the winding needles in sequence for synchronous winding. During the winding process, after the positive electrode sheet, the separator, and the negative electrode sheet are wound on the winding needle, the winding needle needs to be withdrawn from the core to enter the next process.

[0004] However, although the existing core electrode sheet winding mechanism meets the production requirements to a certain extent, there are still certain defects in actual application. Among them, in the process of withdrawing the winding needle from the core after winding, the winding needles of the existing winding machine are generally two single-direction horizontally arranged. The electrode sheet and the separator are horizontally output to the winding needles and wound by the winding needles. After winding, when the winding needle needs to be withdrawn from the core, since the existing winding needle is only single-directionally arranged, when the winding needle is withdrawn from one end of the core, it is easy to cause deformation of the electrode sheet and the separator inside the core, and when the winding needle is withdrawn from one end of the core, due to the influence of the friction between the outer surface of the winding needle and the inside of the core during the withdrawal process, the tension of the electrode sheet and the separator will change during the process of withdrawing the winding needle, resulting in detachment, affecting the production quality and defective rate of the core, and thus being not conducive to the production and use of the winding machine. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the above defects and provide a core synchronous winding mechanism to solve the technical problems that the existing winding needle is not easy to withdraw after winding the core and is easy to cause deformation of the core during the withdrawal process, thus affecting the production quality and production efficiency of the core.

[0006] The purpose of the utility model is achieved in the following way:

[0007] The battery cell synchronous winding mechanism includes a base and a bottom plate. The first winding device and the second winding device are respectively arranged on the base and the bottom plate in a relatively distributed manner. The inner sides of the first winding device and the second winding device adjacent to each other form a winding station and a blanking station. A plurality of groups of winding components are arranged on the inner sides of the first winding device and the second winding device adjacent to each other in a relatively distributed manner. A rotating gear disc is connected to the first winding device. The first winding device and the second winding device are connected by a connecting shaft. The rotating gear disc is meshed with a driving component for driving the first winding device and the second winding device to rotate synchronously, so that the winding components can rotate into the corresponding winding station and blanking station.

[0008] The first ejector pin assembly and the first needle pulling assembly are respectively arranged on the base. The second ejector pin assembly and the second needle pulling assembly, which are arranged opposite to the first ejector pin assembly and the first needle pulling assembly respectively, are arranged on the bottom plate. The first ejector pin assembly and the second ejector pin assembly are used to drive the winding components on the winding station to eject, so that the two relatively distributed winding components on the winding station move closer to each other. The first needle pulling assembly and the second needle pulling assembly are used to drive the winding components on the blanking station to contract, so that the two relatively distributed winding components on the blanking station move away from each other.

[0009] A first rotation driving device for driving the two winding components on the blanking station to perform synchronous rotation actions is connected to the base through a first linkage component. And a second rotation driving device for driving the two winding components on the winding station to perform synchronous rotation actions is connected to the base through a second linkage component.

[0010] Furthermore, in the above description, the first ejector pin assembly and the second ejector pin assembly both include a support seat, an ejecting sliding part, an ejecting cylinder, an ejector rod and a cam bearing. The support seats of the first ejector pin assembly and the second ejector pin assembly are respectively installed on the corresponding base and bottom plate. The ejecting sliding part and the ejecting cylinder are both arranged on the support seat. An ejecting sliding seat is connected to the ejecting sliding part. The telescopic end of the ejecting cylinder is connected to the ejecting sliding seat, so that it can drive the ejecting sliding seat to move along the ejecting sliding part. A first moving cylinder for driving the ejector rod to move towards the winding components on the winding station is connected to the ejecting sliding seat. The cam bearing is installed at the end of the ejector rod extending towards the winding station.

[0011] Further in the above description, the first needle extraction assembly and the second needle extraction assembly both include a support frame, a drawing slider, a drawing cylinder, and a drawing hook block. The support frames of the first needle extraction assembly and the second needle extraction assembly are respectively installed on the corresponding base and bottom plate. The drawing slider and the drawing cylinder are both arranged on the support frame. A drawing slide seat is connected to the drawing slider. The telescopic end of the drawing cylinder is connected to the ejecting slide seat, so that it can drive the drawing slide seat to move along the drawing slider. A second moving cylinder for driving the drawing hook block to move towards the winding assembly at the blanking station is connected to the drawing slide seat. The drawing hook block is installed at the telescopic end of the second moving cylinder, and one end of the drawing hook block extends towards the blanking station.

[0012] Further in the above description, the first winding device includes a first base and a first base body. The first base body is installed in the first base through a first bearing, and first mounting holes for installing the winding assembly are provided at both the winding station and the blanking station of the first base body. The second winding device includes a second base and a second base body. The second base is installed on the bottom plate through a mounting seat. The second base body is installed in the second base through a second bearing, and second mounting holes for installing the winding assembly are provided at both the winding station and the blanking station of the second base body. The rotating gear disk is connected to one end of the first base body, so that the first base body can be driven to rotate through the driving component.

[0013] Further in the above description, the winding assembly is provided with a first winding assembly, a second winding assembly, a third winding assembly, and a fourth winding assembly. The first winding assembly and the third winding assembly are distributed relatively, and are respectively connected to the first mounting hole and the second mounting hole at the winding stations of the first base body and the second base body. The second winding assembly and the fourth winding assembly are distributed relatively, and are respectively connected to the first mounting hole and the second mounting hole at the blanking stations of the first base body and the second base body.

[0014] Specifically, four groups of winding assemblies are provided, and they are distributed in pairs relatively on the first base body and the second base body, so as to facilitate improving the processing efficiency.

[0015] Further in the above description, the first winding assembly, the second winding assembly, the third winding assembly, and the fourth winding assembly all include a winding bushing, a winding shaft, a winding needle, and a pushing hook block. The winding bushing is installed on the corresponding first mounting hole or second mounting hole. The winding shaft is coaxially installed in the winding bushing. The winding needle is arranged at one end of the winding shaft. The winding shaft drives the winding needle to perform telescopic movement along the axial direction of the winding bushing. The pushing hook block is installed at the other end of the winding shaft.

[0016] Specifically, a first transmission gear, a second transmission gear, a third transmission gear, and a fourth transmission gear are respectively connected to the winding bushings of the first winding assembly, the second winding assembly, the third winding assembly, and the fourth winding assembly, so that they can drive the winding needles on the winding shafts to rotate, thereby winding the external pole pieces and diaphragms to form an electric core.

[0017] Further in the above description, at the adjacent ends of the winding needles of the two sets of opposite first winding assemblies and the winding needle of the third winding assembly, and the winding needles of the second winding assembly and the fourth winding assembly, there are formed winding parts for winding the battery cell and inserted and paired with each other. The winding parts are arc-shaped or square.

[0018] Further in the above description, the first linkage assembly includes two first bearing seats, a first linkage shaft and a first driving motor. The two first bearing seats are respectively installed on the base and the bottom plate. The first linkage shaft is installed between the two first bearing seats. The first driving motor is installed on the base and is connected to the first linkage shaft through a first transmission member.

[0019] Symmetric first transmission support columns and second transmission support columns are respectively arranged on the base and the bottom plate. A first rotation driving device for driving the second winding assembly to rotate is arranged on the base. The first rotation driving device includes a first transmission shaft, a first gear and a first connecting member. The first transmission shaft is installed on the first transmission support column, and one end of the first transmission shaft passes through the first transmission support column and is connected to the first winding device. The first gear is installed at the end of the first transmission shaft close to the first winding device and is connected to the second winding assembly. The end of the first transmission shaft far from the first winding device is connected to one end of the first linkage shaft through the first connecting member, so as to drive the second winding assembly to rotate.

[0020] A second transmission shaft is arranged on the second transmission support column. One end of the second transmission shaft passes through the second transmission support column and is connected to the second winding device. A second gear for driving the fourth winding assembly is arranged at the end of the second transmission shaft close to the second winding device. The end of the second transmission shaft far from the second winding device is connected to the other end of the first linkage shaft through a second connecting member, so that the second winding assembly and the fourth winding assembly can be driven to move synchronously through the first linkage shaft.

[0021] Specifically, the first gear is meshed and connected with the second transmission tooth, and the second gear is meshed and connected with the fourth transmission tooth, so that the first transmission shaft and the second transmission shaft can respectively drive the winding needles of the second winding assembly and the fourth winding assembly to rotate through the drive of the first linkage assembly, thereby completing the synchronous rotation movement of the second winding assembly and the fourth winding assembly, reducing the use of motors and improving the stability of the linkage.

[0022] Further in the above description, the second linkage assembly includes two second bearing seats, a second linkage shaft and a second driving motor. The two second bearing seats are respectively installed on the base and the bottom plate. The second linkage shaft is installed between the two second bearing seats. The second driving motor is installed on the base and is connected to the second linkage shaft through a second transmission member.

[0023] A second rotation drive device for driving the first winding assembly to rotate is provided on the base. The second rotation drive device includes a third transmission shaft, a third gear, and a third connecting member. The third transmission shaft is installed on the first transmission support column, and the third transmission shaft is coaxially sleeved on the first transmission shaft. The third gear is installed at the end of the third transmission shaft close to the first winding device and is connected to the first winding assembly. The end of the third transmission shaft far from the first winding device is connected to one end of the second linkage shaft through the third connecting member, so as to drive the first winding assembly to rotate;

[0024] A fourth transmission shaft is provided on the second transmission support column. The fourth transmission shaft is coaxially sleeved on the second transmission shaft, and a fourth gear for driving the third winding assembly is provided at the end of the fourth transmission shaft close to the second winding device. The end of the fourth transmission shaft far from the second winding device is connected to the other end of the second linkage shaft through a fourth connecting member, so that the first winding assembly and the third winding assembly can be driven to move synchronously through the second linkage shaft.

[0025] Specifically, the third gear is meshed and connected with the first transmission tooth, and the fourth gear is meshed and connected with the third transmission tooth, so that the third transmission shaft and the fourth transmission shaft can drive the winding needles of the first winding assembly and the third winding assembly to rotate respectively through the drive of the second linkage assembly, thereby completing the synchronous rotation movement of the first winding assembly and the third winding assembly, reducing the use of motors, and improving the stability of the linkage.

[0026] Further in the above description, the drive assembly includes a drive source and a drive gear disk. The drive gear disk is installed on the output shaft of the drive source, and the drive gear disk is meshed and connected with the rotating gear disk.

[0027] The beneficial effects of the present utility model: Winding stations and blanking stations are provided on the first winding device and the second winding device, and relatively distributed winding assemblies are provided in the corresponding winding stations and blanking stations. The winding assemblies at the winding stations are driven to perform synchronous rotation actions through the second linkage assembly, and through the coordinated use of the first ejector pin assembly and the second ejector pin assembly, the winding assemblies at the winding stations can be accurately driven to eject and approach each other, ensuring the tight fit and accurate alignment of the battery core during the winding process, and improving the product quality;

[0028] After the winding component at the winding station completes the winding action, the driving component drives the rotating gear disk to drive the first winding device to rotate. Under the connection of the connecting shaft and the second winding device, it performs a synchronous rotation action, so that the workpiece completed winding at the winding station rotates to the blanking station. The winding component at the blanking station is driven by the first linkage component to perform a synchronous rotation action. At the same time, the first needle pulling component and the second needle pulling component effectively drive the winding component at the blanking station to contract and pull away from both ends of the workpiece. By pulling the workpiece in both directions, the influence of unidirectional needle pulling on the core-pulling deformation of the workpiece is avoided. The two-way needle pulling can offset the friction generated when the winding component at the blanking station pulls out from the workpiece, so as to facilitate the smooth blanking of the workpiece and reduce the influence of the needle pulling of the winding component on the damage of the workpiece. The second linkage component provided can ensure the synchronism and consistency of the workpiece during the winding process, thereby improving production efficiency. At the same time, the double stations of the winding station and the blanking station enable the winding and blanking processes to be carried out synchronously, further improving production efficiency. Brief Description of the Drawings

[0029] Figure 1 It is a schematic diagram of the overall structure in the first direction of this embodiment;

[0030] Figure 2 It is a schematic diagram of the overall structure in the second direction of this embodiment;

[0031] Figure 3 It is a top view of this embodiment;

[0032] Figure 4 It is a schematic diagram of the overall structure of the winding component in this embodiment;

[0033] Figure 5 It is a schematic diagram of the driving structure of the winding component in this embodiment;

[0034] Figure 6 It is a schematic diagram of the driving connection structure of the winding component in this embodiment;

[0035] Figure 7 It is a schematic diagram of the structure of the first thimble component and the second thimble component in this embodiment;

[0036] Figure 8 It is a schematic diagram of the structure of the first needle pulling component and the second needle pulling component in this embodiment;

[0037] Figure 9 It is a schematic diagram of the structure of the first linkage component in this embodiment;

[0038] Figure 10 It is a schematic diagram of the structure of the second linkage component in this embodiment;

[0039] The reference numerals in the drawings are respectively:

[0040] 1 - Base, 2 - Bottom plate, 3 - Rotating gear disk, 4 - Connecting shaft, 5 - First transmission gear, 6 - Second transmission gear, 7 - Third transmission gear, 8 - Fourth transmission gear, 9 - First transmission support column, 10 - Second transmission support column, 11 - First connecting piece, 12 - Second transmission shaft, 13 - Second gear, 14 - Second connecting piece, 15 - Third connecting piece, 16 - Fourth transmission shaft, 17 - Fourth gear, 18 - Fourth connecting piece; 19 - First transmission shaft, 20 - First gear, 21 - Third transmission shaft, 22 - Third gear;

[0041] 100 - First winding device, 101 - First base, 102 - First matrix, 103 - First bearing, 200 - Second winding device, 201 - Second base, 202 - Second matrix, 203 - Second bearing;

[0042] 300 - Winding assembly, 30a - First winding assembly, 30b - Second winding assembly, 30c - Third winding assembly, 30d - Fourth winding assembly, 301 - Winding bushing, 302 - Reel, 303 - Winding needle, 304 - Pushing hook block, 305 - Winding part;

[0043] 400a - First ejector pin assembly, 400b - Second ejector pin assembly, 401 - Support seat, 402 - Ejecting sliding part, 403 - Ejecting cylinder, 404 - Ejecting rod, 405 - Cam bearing, 406 - Ejecting sliding seat, 407 - First moving cylinder;

[0044] 500a - First needle pulling assembly, 500b - Second needle pulling assembly, 501 - Support frame, 502 - Pulling and extracting sliding part, 503 - Pulling and extracting cylinder, 504 - Pulling and extracting hook block, 505 - Pulling and extracting sliding seat, 506 - Second moving cylinder;

[0045] 600 - First linkage assembly, 601 - First bearing seat, 602 - First linkage shaft, 603 - First driving motor;

[0046] 700 - Second linkage assembly, 701 - Second bearing seat, 702 - Second linkage shaft, 703 - Second driving motor. Detailed implementation mode

[0047] The present utility model will be further described in detail below in conjunction with the accompanying drawings and the specific implementation mode.

[0048] Refer to the corresponding reference coordinate system in the attached drawings. The bottom plate and the base are arranged front and back, so that the corresponding second winding device and the first winding device are installed front and back. The first thimble assembly and the second thimble assembly are arranged on the left side of the reference coordinate system, and the first needle-pulling assembly and the second needle-pulling assembly are arranged on the right side of the reference coordinate system. Specifically, the coordinate system given in this embodiment is only for the convenience of describing this embodiment, and there is no specific limitation on the actual installation position.

[0049] In this embodiment, referring to Figures 1 - 10 , the core synchronous winding mechanism implemented specifically includes a base 1 and a bottom plate 2. The base 1 and the bottom plate 2 are respectively provided with a first winding device 100 and a second winding device 200 that are distributed relatively. The inner sides adjacent to the first winding device 100 and the second winding device 200 both form a winding station and a blanking station. The winding station and the blanking station are arranged left and right in the reference coordinate system. The inner sides adjacent to the first winding device 100 and the second winding device 200 are both provided with four groups of winding assemblies 300 that are distributed relatively. A rotating gear disk 3 is connected to the first winding device 100. The first winding device 100 and the second winding device 200 are connected by a connecting shaft 4. The rotating gear disk 3 is meshed with a driving assembly (not shown) for driving the first winding device 100 and the second winding device 200 to rotate synchronously, so that the winding assemblies 300 can rotate into the corresponding winding station and blanking station;

[0050] The base 1 is respectively provided with a first thimble assembly 400a and a first needle-pulling assembly 500a, and the bottom plate 2 is respectively provided with a second thimble assembly 400b and a second needle-pulling assembly 500b that are arranged opposite to the first thimble assembly 400a and the first needle-pulling assembly 500a. The first thimble assembly 400a and the second thimble assembly 400b are used to drive the winding assemblies 300 on the winding station to eject, so that the two relatively arranged winding assemblies 300 on the winding station move closer to each other. The first needle-pulling assembly 500a and the second needle-pulling assembly 500b are used to drive the winding assemblies 300 on the blanking station to contract, so that the two relatively arranged winding assemblies 300 on the blanking station move away from each other;

[0051] The base 1 is provided with a first linkage assembly 600 for driving the two winding assemblies 300 on the blanking station to perform a synchronous rotation action, and the base 1 is provided with a second linkage assembly 700 for driving the two winding assemblies 300 on the winding station to perform a synchronous rotation action.

[0052] In this embodiment, referring to Figure 1 and Figure 7, both the first ejector pin assembly 400a and the second ejector pin assembly 400b include a support base 401, an ejecting slider 402, an ejecting cylinder 403, an ejector rod 404, and a cam bearing 405. The support bases 401 of the first ejector pin assembly 400a and the second ejector pin assembly 400b are respectively installed on the tops of the corresponding base 1 and bottom plate 2. The ejecting slider 402 and the ejecting cylinder 403 are both arranged on the top of the support base 401. An ejecting slide base 406 is connected to the ejecting slider 402. The telescopic end of the ejecting cylinder 403 is connected to the ejecting slide base 406, enabling it to drive the ejecting slide base 406 to move along the ejecting slider 402. A first moving cylinder 407 for driving the ejector rod 404 to move towards the winding assembly 300 at the winding station is connected to the ejecting slide base 406. The cam bearing 405 is installed at the end of the ejector rod 404 extending towards the winding station.

[0053] Specifically, the first moving cylinder 407 drives the cam bearing 405 at the end of the ejector rod 404 to move towards the winding assembly 300 at the winding station and abuts against it. The ejector rod 404 is driven by the ejecting cylinder 403 to drive the winding assembly 300, so that the winding needle 303 of the winding assembly 300 at the winding station can be ejected axially along the winding bushing 301, thereby facilitating the subsequent winding of the external pole piece and diaphragm, and improving work efficiency and reliability.

[0054] In this embodiment, referring to Figure 1 and Figure 8 , both the first needle pulling assembly 500a and the second needle pulling assembly 500b include a support frame 501, a pulling slider 502, a pulling cylinder 503, and a pulling hook block 504. The support frames 501 of the first needle pulling assembly 500a and the second needle pulling assembly 500b are respectively installed on the tops of the corresponding base 1 and bottom plate 2. The pulling slider 502 and the pulling cylinder 503 are both arranged on the top of the support frame 501. A pulling slide base 505 is connected to the pulling slider 502. The telescopic end of the pulling cylinder 503 is connected to the ejecting slide base 406, enabling it to drive the pulling slide base 505 to move along the pulling slider 502. A second moving cylinder 506 for driving the pulling hook block 504 to move towards the winding assembly 300 at the feeding station is connected to the pulling slide base 505. The pulling hook block 504 is installed at the telescopic end of the second moving cylinder 506, and one end of the pulling hook block 504 extends towards the feeding station.

[0055] In this embodiment, both the ejecting slider 402 and the pulling slider 502 are composed of a slider and a slide rail.

[0056] Specifically, a clamping groove paired with the pushing hook block 304 is provided at the end of the extraction hook block 504 close to the blanking station, so that the extraction hook block 504 is driven by the second moving cylinder 506 to move towards the winding assembly 300 at the blanking station, and is clamped with the pushing hook block 304 of the winding assembly 300 through the clamping groove. The extraction hook block 504 is driven by the extraction cylinder 503 to drive the pushing hook block 304, so that the reel 302 drives the winding needle 303 to contract the winding shaft sleeve 301, and the winding needle 303 is pulled out from the wound battery cell. And through the relative arrangement of the winding assembly 300, the influence on the battery cell during the extraction process of the winding needle 303 is reduced, the stability and reliability of the extraction of the winding needle 303 are improved, the defective phenomenon of the battery cell due to core extraction is reduced, and it is convenient for the battery cell to enter the next process.

[0057] In this embodiment, referring to Figure 1 and Figure 8 , the first winding device 100 includes a first base 101 and a first base body 102. The first base body 102 is installed in the first base 101 through a first bearing 103, and first mounting holes for installing the winding assembly 300 are provided at both the winding station and the blanking station of the first base body 102. The second winding device 200 includes a second base 201 and a second base body 202. The second base 201 is installed on the bottom plate 2 through a mounting seat. The second base body 202 is installed in the second base 201 through a second bearing 203, and second mounting holes for installing the winding assembly 300 are provided at both the winding station and the blanking station of the second base body 202. The rotating gear disk 3 is connected to one end of the first base body 102, so that the first base body 102 can be driven to perform a rotating action through the driving assembly.

[0058] Specifically, through the provided first bearing 103, the first base body 102 can perform a rotating action along the first base 101 and can drive the first winding assembly 30a and the second winding assembly 30b to perform a flipping action. Through the provided second bearing 203, the second base body 202 can perform a rotating action along the second base 201 and can drive the third winding assembly 30c and the fourth winding assembly 30d to perform a flipping action.

[0059] Specifically, when the external pole piece and diaphragm are wound at the winding station to form a battery cell, the rotating gear disk 3 drives the first base body 102 to perform a rotating action, and the second winding device 200 is driven to rotate by the connecting shaft 4, so that the battery cell wound at the winding station can be rotated to the blanking station, thereby improving the working efficiency of winding the battery cell.

[0060] In this embodiment, referring to Figure 1 , Figure 3 , Figure 4 and Figure 5, the winding assembly 300 is provided with a first winding assembly 30a, a second winding assembly 30b, a third winding assembly 30c and a fourth winding assembly 30d. The first winding assembly 30a and the third winding assembly 30c are distributed relatively, and are respectively connected to the first mounting hole and the second mounting hole of the winding stations on the first base 102 and the second base 202. The second winding assembly 30b and the fourth winding assembly 30d are distributed relatively, and are respectively connected to the first mounting hole and the second mounting hole of the loading and unloading stations on the first base 102 and the second base 202.

[0061] Specifically, the four groups of winding assemblies 300 are distributed in pairs relatively on the first base 102 and the second base 202, so as to facilitate improving the processing efficiency.

[0062] In this embodiment, referring to Figures 3 - 5 , the first winding assembly 30a, the second winding assembly 30b, the third winding assembly 30c and the fourth winding assembly 30d all include a winding bushing 301, a winding shaft 302, a winding needle 303 and a push hook block 304. The winding bushing 301 is installed on the corresponding first mounting hole or second mounting hole. The winding shaft 302 is coaxially installed inside the winding bushing 301. The winding needle 303 is arranged at one end of the winding shaft 302. The winding shaft 302 drives the winding needle 303 to perform telescopic movement along the axial direction of the winding bushing 301. The push hook block 304 is installed at the other end of the winding shaft 302.

[0063] Specifically, the first transmission gear 5, the second transmission gear 6, the third transmission gear 7 and the fourth transmission gear 8 are respectively connected to the winding bushings 301 of the first winding assembly 30a, the second winding assembly 30b, the third winding assembly 30c and the fourth winding assembly 30d, so as to drive the winding needles 303 on the winding shafts 302 to rotate, and thus the external pole pieces and diaphragms can be wound to form an electric core.

[0064] In this embodiment, referring to Figures 3 - 5 , the winding needles 303 of the two relatively arranged first winding assemblies 30a and the winding needles 303 of the third winding assembly 30c, and the winding needles 303 of the second winding assembly 30b and the winding needles 303 of the fourth winding assembly 30d form winding parts 305 for winding the electric core and inserted and paired with each other at the adjacent ends. The outer surface of the winding part 305 is arc-shaped, and the winding parts 305 of the two winding needles 303 form a cylindrical shape after being inserted and matched.

[0065] Specifically, the winding parts 305 of the winding needles 303 of the two relatively arranged winding assemblies are inserted and paired to form a cylindrical shape, so as to wind the external pole pieces and diaphragms. And the relatively arranged winding needles 303 facilitate subsequent extraction from both ends of the wound electric core. Thus, when extracting in two opposite directions, the frictional forces for extraction at both ends cancel each other out, reducing the problem of core extraction of the electric core and preventing the pole pieces and / or diaphragms from deforming and falling off.

[0066] In this embodiment, the first linkage assembly 600 is installed on the right side. The first linkage assembly 600 includes two first bearing seats 601, a first linkage shaft 602, and a first drive motor 603. The two first bearing seats 601 are respectively installed on the base 1 and the bottom plate 2. The first linkage shaft 602 is installed between the two first bearing seats 601. The first drive motor 603 is installed on the base 1 and is connected to the first linkage shaft 602 through a first transmission member;

[0067] Symmetric first transmission support columns 9 and second transmission support columns 10 are respectively arranged on the base 1 and the bottom plate 2. A first rotation drive device for driving the second winding assembly 30b to rotate is arranged on the base 1. The first rotation drive device includes a first transmission shaft 19, a first gear 20, and a first connecting member 11. The first transmission shaft 19 is installed on the first transmission support column 9, and one end of the first transmission shaft 19 passes through the first transmission support column 9 and is connected to the first winding device 100. The first gear 20 is installed at the end of the first transmission shaft 19 close to the first winding device 100 and is connected to the second winding assembly 30b. The end of the first transmission shaft 19 far from the first winding device 100 is connected to one end of the first linkage shaft 602 through the first connecting member 11, so as to drive the second winding assembly 30b to rotate;

[0068] A second transmission shaft 12 is arranged on the second transmission support column 10. One end of the second transmission shaft 12 passes through the second transmission support column 10 and is connected to the second winding device 200. A second gear 13 for driving the fourth winding assembly 30d is arranged at the end of the second transmission shaft 12 close to the second winding device 200. The end of the second transmission shaft 12 far from the second winding device 200 is connected to the other end of the first linkage shaft 602 through a second connecting member 14, so that the second winding assembly 30b and the fourth winding assembly 30d can be driven to move synchronously through the first linkage shaft 602.

[0069] Specifically, the first gear 20 is meshed and connected with the second transmission tooth 6, and the second gear 13 is meshed and connected with the fourth transmission tooth 8, so that the first transmission shaft 19 and the second transmission shaft 12 can respectively drive the winding needles 303 of the second winding assembly 30b and the fourth winding assembly 30d to rotate through the drive of the first linkage assembly 600, thereby completing the synchronous rotation movement of the second winding assembly 30b and the fourth winding assembly 30d, reducing the use of motors, and improving the stability of the linkage.

[0070] Specifically, the winding assembly 300 at the winding station flips and enters the blanking station. By extracting the needle from the electric core at the blanking station, the working efficiency can be improved.

[0071] In this embodiment, the second linkage assembly 700 is installed on the left side. The second linkage assembly 700 includes two second bearing seats 701, a second linkage shaft 702, and a second drive motor 703. The two second bearing seats 701 are respectively installed on the base 1 and the bottom plate 2. The second linkage shaft 702 is installed between the two second bearing seats 701. The second drive motor 703 is installed on the base 1 and is connected to the second linkage shaft 702 through a second transmission member.

[0072] A second rotation drive device for driving the first winding assembly 30a to rotate is provided on the base 1. The second rotation drive device includes a third transmission shaft 21, a third gear 22, and a third connecting member 15. The third transmission shaft 21 is installed on the first transmission support column 9, and the third transmission shaft 21 is coaxially sleeved on the first transmission shaft 19. The first transmission shaft 19 is sleeved inside the third transmission shaft 21, so that the first transmission shaft 19 and the third transmission shaft 21 are arranged with their axes in the middle of each other. The third gear 22 is installed at the end of the third transmission shaft 21 close to the first winding device 100 and is connected to the first winding assembly 30a. The end of the third transmission shaft 21 far from the first winding device 100 is connected to one end of the second linkage shaft 702 through the third connecting member 15, so that it can drive the first winding assembly 30a to rotate.

[0073] A fourth transmission shaft 16 is provided on the second transmission support column 10. The fourth transmission shaft 16 is coaxially sleeved on the second transmission shaft 12. The second transmission shaft 12 is sleeved inside the fourth transmission shaft 16, so that the second transmission shaft 12 and the fourth transmission shaft 16 are arranged with their axes in the middle of each other. A fourth gear 17 for driving the third winding assembly 30c is provided at the end of the fourth transmission shaft 16 close to the second winding device 200. The end of the fourth transmission shaft 16 far from the second winding device 200 is connected to the other end of the second linkage shaft 702 through a fourth connecting member 18. Thus, the first winding assembly 30a and the third winding assembly 30c can be driven to move synchronously through the second linkage shaft 702.

[0074] Specifically, the third gear 22 is meshed and connected with the first transmission tooth 5, and the fourth gear 17 is meshed and connected with the third transmission tooth 7. Through the drive of the second linkage assembly 700, the third transmission shaft 21 and the fourth transmission shaft 16 can respectively drive the winding needles 303 of the first winding assembly 30a and the third winding assembly 30c to rotate, so that the synchronous rotation movement of the first winding assembly 30a and the third winding assembly 30c can be completed, reducing the use of motors and improving the stability of the linkage.

[0075] In this embodiment, the drive assembly includes a drive source (not shown) and a drive gear disc (not shown). The drive gear disc is installed on the output shaft of the drive source, and the drive gear disc is meshed and connected with the rotating gear disc 3.

[0076] Specifically, the driving source is connected to the external frame, and the driving gear disk is installed on the output shaft of the driving source. Under the meshing of the driving gear disk and the rotating gear disk 3, the rotating gear disk 3 can be driven to drive the first winding assembly 30a and the second winding assembly 30b on the first base body 102 and the third winding assembly 30c and the fourth winding assembly 30d on the second base body 202 to flip, so that the battery cells on the winding assembly 300 can quickly flip into the blanking station, improving the work efficiency.

[0077] In this embodiment, the first connecting member, the second connecting member, the third connecting member, and the fourth connecting member are all composed of a belt and two synchronous pulleys.

[0078] The specific working principle in this embodiment is as follows:

[0079] The winding needles are ejected. Through the coordinated use of the first ejector pin assembly 400a and the second ejector pin assembly 400b, the winding needles 303 of the first winding assembly 30a and the winding needles 303 of the third winding assembly 30c on the winding station are driven to move closer to each other, and the winding parts 305 of the winding needles 303 of the first winding assembly 30a and the winding needles 303 of the third winding assembly 30c are inserted and paired with each other, facilitating the winding of the external pole piece and the separator.

[0080] Winding: Driven by the second linkage assembly 700, the first winding assembly 30a and the third winding assembly 30c are driven to perform synchronous rotation actions through the third connecting member 15 and the fourth connecting member 18, ensuring the tight fitting and precise alignment of the battery cells during the winding process and improving the product quality.

[0081] Pulling out the winding needles: Driven by the first linkage assembly 600, the second winding assembly 30b and the fourth winding assembly 30d are driven to perform synchronous rotation actions through the first connecting member 11 and the second connecting member 14. Through the coordinated use of the first needle pulling assembly 500a and the second needle pulling assembly 500b, the second winding assembly 30b and the fourth winding assembly 30d on the blanking station are clamped by the pulling and hooking block 504 and the pushing and hooking block 304, and the winding needles 303 of the second winding assembly 30b and the winding needles 303 of the fourth winding assembly 30d are withdrawn from the wound battery cells under the drive of the second moving cylinder 506.

[0082] Flipping: When the winding assembly at the winding station completes the winding action, the rotating gear disk 3 is driven by the driving assembly to drive the first winding device 100 to rotate. Under the connection of the connecting shaft 4 and the second winding device 200, it performs a synchronous rotation action, so that the workpiece completed at the winding station rotates to the blanking station.

[0083] At this time, the first winding assembly 30a and the third winding assembly 30c move to the blanking station, and the second winding assembly 30b and the fourth winding assembly 30d move to the winding station, so that the first ejector pin assembly 400a and the second ejector pin assembly 400b repeat the action of ejecting the winding needles 303 of the second winding assembly 30b and the fourth winding assembly 30d, and driven by the second linkage assembly 700, they drive the second winding assembly 30b and the fourth winding assembly 30d at the winding station to perform synchronous rotation actions through the first connecting member 11 and the second connecting member 14, ensuring the tight fit and precise alignment of the battery core during winding, and improving the product quality;

[0084] And driven by the first linkage assembly 600, they drive the first winding assembly 30a and the third winding assembly 30c at the blanking station to perform synchronous rotation actions through the third connecting member 15 and the fourth connecting member 18. Through the coordinated use of the first needle-pulling assembly 500a and the second needle-pulling assembly 500b, they are clamped with the pushing hook blocks 304 of the first winding assembly 30a and the third winding assembly 30c at the blanking station through the pulling hook blocks 504, and driven by the second moving cylinder 506, the winding needles 303 of the first winding assembly 30a and the winding needles 303 of the third winding assembly 30c are withdrawn from the wound battery core, thus completing the cyclic action and improving the processing efficiency;

[0085] In summary, through the first needle-pulling assembly 500a and the second needle-pulling assembly 500b, the winding assemblies at the blanking station are effectively driven to contract and pull away from both ends of the workpiece. By pulling in both directions of the workpiece, the influence of single-direction pulling on the core deformation of the workpiece is avoided. The two-way pulling can make the friction generated by the pulling of the winding assemblies at the blanking station from the workpiece cancel each other out, thus facilitating the smooth blanking of the workpiece and reducing the influence of the pulling of the winding assemblies on the damage of the workpiece. By setting the first linkage assembly 600 and the second linkage assembly 700, the synchronism and consistency of the workpiece can be ensured, thereby improving the production efficiency. At the same time, the dual-station design of the winding station and the blanking station enables the winding and blanking processes to be carried out synchronously, further improving the production efficiency.

[0086] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention is disclosed above in a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, when making some changes or modifications to the above-disclosed technical content as equivalent change equivalent embodiments, but as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical meaning of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A synchronous winding mechanism for a battery cell, comprising a base and a bottom plate, characterized in that: The base and the bottom plate are respectively provided with a first winding device and a second winding device which are relatively distributed, and the adjacent inner sides of the first winding device and the second winding device are formed with a winding station and a material unloading station, and the adjacent inner sides of the first winding device and the second winding device are provided with a plurality of relatively distributed groups of winding assemblies, and the first winding device is connected with a rotating toothed disc, and the first winding device and the second winding device are connected by a connecting shaft, and the rotating toothed disc is meshedly connected with a driving assembly for driving the first winding device and the second winding device to rotate synchronously, so that the winding assembly can rotate into the corresponding winding station and material unloading station; A first ejector assembly and a first needle pulling assembly are respectively arranged on the base, and a second ejector assembly and a second needle pulling assembly are respectively arranged on the bottom plate, which are arranged opposite to the first ejector assembly and the first needle pulling assembly. The first ejector assembly and the second ejector assembly are used to drive the winding assembly on the winding station to eject, so that the two opposite groups of winding assemblies on the winding station are moved closer to each other. The first needle pulling assembly and the second needle pulling assembly are used to drive the winding assembly on the unloading station to retract, so that the two opposite groups of winding assemblies on the unloading station are moved away from each other. The base is provided with a first linkage component for driving two groups of winding components for driving the unloading station to perform synchronous rotation, and the base is provided with a second linkage component for driving two groups of winding components for driving the winding station to perform synchronous rotation.

2. The synchronous winding mechanism for battery cells according to claim 1, characterized in that: The first ejector assembly and the second ejector assembly each include a support seat, an ejection slide, an ejection cylinder, an ejector rod and a cam bearing. The support seats of the first ejector assembly and the second ejector assembly are respectively mounted on the corresponding base and bottom plate. The ejection slide and the ejection cylinder are both arranged on the support seat. The ejection slide is connected to the ejection slide. The telescopic end of the ejection cylinder is connected to the ejection slide so that it can drive the ejection slide to move along the ejection slide. The ejection slide is connected to the first moving cylinder for driving the ejector rod to move toward the winding assembly of the winding station. The cam bearing is mounted on the end of the ejector rod extending toward the winding station.

3. The synchronous winding mechanism for battery cells according to claim 1, characterized in that: The first needle pulling assembly and the second needle pulling assembly both include a support frame, a pulling-out slide, a pulling-out cylinder and a pulling-out hook block. The support frames of the first needle pulling assembly and the second needle pulling assembly are respectively mounted on the corresponding base and bottom plate, the pulling-out slide and the pulling-out cylinder are both arranged on the support frame, the pulling-out slide is connected to the pulling-out slide, the telescopic end of the pulling-out cylinder is connected to the ejection slide so that it can drive the pulling-out slide to move along the pulling-out slide, the pulling-out slide is connected to the second moving cylinder for driving the pulling-out hook block to move toward the winding assembly of the lower feeding station, the pulling-out hook block is mounted on the telescopic end of the second moving cylinder, and one end of the pulling hook block extends to the lower feeding station.

4. The synchronous winding mechanism for battery cells according to claim 3, characterized in that: The first winding device includes a first base and a first substrate, the first substrate is installed in the first base through a first bearing, and the winding station and the unloading station of the first substrate are both provided with a first mounting hole for mounting a winding assembly, the second winding device includes a second base and a second substrate, the second base is installed on the bottom plate through a mounting seat, the second substrate is installed in the second base through a second bearing, and the winding station and the unloading station of the second substrate are both provided with a second mounting hole for mounting a winding assembly, and the rotating gear is connected to one end of the first substrate, so that the first substrate can be driven to rotate through the driving assembly.

5. The synchronous winding mechanism for battery cells according to claim 4, characterized in that: The winding assembly is provided with a first winding assembly, a second winding assembly, a third winding assembly and a fourth winding assembly. The first winding assembly and the third winding assembly are relatively distributed and are respectively connected to the first mounting hole and the second mounting hole of the winding station on the first substrate and the second substrate. The second winding assembly and the fourth winding assembly are relatively distributed and are respectively connected to the first mounting hole and the second mounting hole of the loading and unloading stations of the first substrate and the second substrate.

6. The synchronous winding mechanism for battery cells according to claim 5, characterized in that: The first winding assembly, the second winding assembly, the third winding assembly and the fourth winding assembly all include a winding sleeve, a reel, a winding needle and a push hook block. The winding sleeve is installed on the corresponding first mounting hole or the second mounting hole. The reel is coaxially installed in the winding sleeve. The winding needle is arranged at one end of the reel. The reel drives the winding needle to perform telescopic movement along the axial direction of the winding sleeve. The push hook block is installed at the other end of the reel.

7. The synchronous winding mechanism for battery cells according to claim 6, characterized in that: The two opposite groups of winding needles of the first winding assembly and the third winding assembly, and the winding needles of the second winding assembly and the fourth winding assembly have winding parts at adjacent ends for winding the battery cells and are plugged into and paired with each other, and the winding parts are arc-shaped or square-shaped.

8. The synchronous winding mechanism for battery cells according to claim 6, characterized in that: The first linkage assembly includes two first bearing seats, a first linkage shaft and a first drive motor, the two first bearing seats are respectively mounted on the base and the bottom plate, the first linkage shaft is mounted between the two first bearing seats, the first drive motor is mounted on the base and connected to the first linkage shaft through a first transmission member; A symmetrical first transmission support column and a second transmission support column are respectively provided on the base and the bottom plate, a first rotation driving device for driving the second winding assembly to rotate is provided on the base, the first rotation driving device comprises a first transmission shaft, a first gear and a first connecting member, the first transmission shaft is mounted on the first transmission support column, and one end of the first transmission shaft passes through the first transmission support column and is connected to the first winding device, the first gear is mounted on the end of the first transmission shaft close to the first winding device and is connected to the second winding assembly, and the end of the first transmission shaft away from the first winding device is connected to one end of the first linkage shaft through the first connecting member, so that it can drive the second winding assembly to rotate; A second transmission shaft is arranged on the second transmission support column, one end of the second transmission shaft passes through the second transmission support column and is connected to the second winding device, and a second gear for driving the fourth winding assembly is arranged at an end of the second transmission shaft close to the second winding device, and an end of the second transmission shaft away from the second winding device is connected to the other end of the first linkage shaft through a second connecting member, so that the second winding assembly and the fourth winding assembly can be driven to move synchronously through the first linkage shaft.

9. The synchronous winding mechanism for battery cells according to claim 6, characterized in that: The second linkage assembly includes two second bearing seats, a second linkage shaft and a second drive motor, the two second bearing seats are respectively mounted on the base and the bottom plate, the second linkage shaft is mounted between the two second bearing seats, the second drive motor is mounted on the base and connected to the second linkage shaft through a second transmission member; A second rotation driving device for driving the first winding assembly to rotate is provided on the base, and the second rotation driving device includes a third transmission shaft, a third gear and a third connecting member. The third transmission shaft is installed on the first transmission support column, and the third transmission shaft is coaxially sleeved on the first transmission shaft. The third gear is installed at the end of the third transmission shaft close to the first winding device and is connected to the first winding assembly. The end of the third transmission shaft away from the first winding device is connected to one end of the second linkage shaft through the third connecting member, so that it can drive the first winding assembly to rotate. A fourth transmission shaft is arranged on the second transmission support column, and the fourth transmission shaft is coaxially sleeved on the second transmission shaft. A fourth gear for driving the third winding assembly is arranged at an end of the fourth transmission shaft close to the second winding device, and an end of the fourth transmission shaft away from the second winding device is connected to the other end of the second linkage shaft through a fourth connecting piece, so that the first winding assembly and the third winding assembly can be driven to move synchronously through the second linkage shaft.

10. The synchronous winding mechanism for battery cells according to any one of claims 1 to 9, characterized in that: The driving assembly comprises a driving source and a driving gear disc, wherein the driving gear disc is mounted on an output shaft of the driving source and is meshedly connected with a rotating gear disc.

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