Multi-pole piece feeding and cutting mechanism and lithium battery winding machine

Abstract

According to the multi-pole piece feeding and cutting mechanism and the lithium battery winding machine, a first sliding base and a second sliding base are arranged front and back, and a first feeding clamp assembly and a second feeding clamp assembly are arranged on the first sliding base, so that the first sliding base drives the first feeding clamp assembly and the second feeding clamp assembly to move synchronously; the first feeding clamp assembly and the second feeding clamp assembly are arranged to automatically clamp the first pole piece and the second pole piece after moving to be synchronous with the first pole piece and the second pole piece along with the first sliding seat, so that the feeding time is shortened, and the feeding efficiency is improved; the cutter assembly is arranged on the second sliding seat, the second sliding seat is driven to drive the cutter assembly to cut the first pole piece and the second pole piece, synchronous cutting of the first pole piece and the second pole piece is achieved, one cutter assembly is arranged, the installation space is saved, and the first pole piece and the second pole piece are accurately cut through synchronous cutting. According to the multi-core winding machine, the problems of low feeding efficiency and high equipment cost of the multi-core winding machine in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery manufacturing technical field especially relates to a plurality of pole piece feeding and cutting mechanism and lithium battery winding machine. BACKGROUND

[0002] With the development of lithium electricity industry, each part of winding equipment has developed maturely, and the speed of each step of lithium battery winding equipment has reached the limit. The traditional winding equipment has been insufficient to meet the demand of high efficiency of lithium battery winding. In the related art, a double-core winding equipment is provided, that is, corresponding winding mechanisms are arranged on the inner and outer sides of the corresponding winding equipment, so that the winding of the battery core is carried out simultaneously on the inner and outer sides, and the winding efficiency of the lithium battery winding equipment is improved.

[0003] In the related art, two or more clip assemblies are arranged in the double-core winding equipment, and the pole pieces meeting the winding requirement are conveyed through the plurality of clip assemblies, and then conveyed to the cutting position for cutting. In the related art, the pole pieces are controlled separately by the clip assemblies, and then the feeding is completed after the clamping, which increases the feeding time and reduces the feeding efficiency. At the same time, in the related art, the pole pieces are cut separately, and a plurality of cutting devices need to be installed in the limited space, which increases the equipment cost.

[0004] At present, there is no effective solution to the problems of low feeding efficiency and high equipment cost of the multi-core winding machine in the related art. UTILITY MODEL CONTENTS

[0005] Therefore, it is necessary to provide a plurality of pole piece feeding and cutting mechanism and lithium battery winding machine to at least solve the problems of low feeding efficiency and high equipment cost of the multi-core winding machine in the related art.

[0006] In a first aspect, the utility model provides a technical scheme as follows: a plurality of pole piece feeding and cutting mechanism, including base, be equipped with first sliding seat and second sliding seat that set up in front and back in longitudinal direction on the base, be equipped with first feeding clip assembly and second feeding clip assembly that set up side by side along transverse direction on the first sliding seat, be equipped with cutter assembly that is movable and is docked with first feeding clip assembly and second feeding clip assembly on the second sliding seat, wherein, first feeding clip assembly and second feeding clip assembly are used for following first sliding seat moves along longitudinal direction, and after moving with first sliding seat and synchronizing with first pole piece and second pole piece in feeding, first pole piece and second pole piece are clamped respectively, and first pole piece and second pole piece that are clamped are sent to cutter assembly respectively; cutter assembly is used for following second sliding seat moves along longitudinal direction, and after moving and accelerating with second sliding seat and synchronizing with the speed of first pole piece and second pole piece that pass through cutter assembly, first pole piece and second pole piece are cut off synchronously in cutting station.

[0007] In one of the embodiments, the base is further provided with a guide device extending in the longitudinal direction, the first slide and the second slide are movably connected with the guide device, the first slide is further connected with the feeding driving assembly through a first transmission plate, and the second slide is further connected with the cutting driving assembly through a second transmission plate, wherein the feeding driving assembly is used to drive the first slide to drive the first feeding clamp assembly and the second feeding clamp assembly to slide along the guide device, so that the first feeding clamp assembly and the second feeding clamp assembly respectively clamp the first pole piece and the second pole piece after being accelerated to be synchronized with the feeding, and the clamped first pole piece and second pole piece are respectively sent to the cutting assembly, and the first feeding clamp assembly and the second feeding clamp assembly are driven to retreat to the initial position after the feeding is completed; the cutting driving assembly is used to drive the second slide to drive the cutting assembly to slide along the guide device, so that the cutting assembly cuts the first pole piece and the second pole piece passing through the cutting assembly, and the cutting assembly is driven to slow down and stop and retreat to the initial position after the cutting is completed.

[0008] In one of the embodiments, the feeding driving assembly and the cutting driving assembly each include a transmission unit and a driving unit, the transmission unit is longitudinally arranged at the bottom of the base and is in transmission connection with the driving unit, the transmission unit of the feeding driving assembly is in transmission connection with the first slide, and the transmission unit of the cutting driving assembly is in transmission connection with the second slide, wherein the driving unit is used to drive the transmission unit to drive the first slide or the second slide to slide along the guide device.

[0009] In one of the embodiments, the transmission unit includes a ball screw, the driving unit includes a driving motor, and / or the guide device includes a linear guide rail.

[0010] In one of the embodiments, the first feeding clamp assembly and the second feeding clamp assembly each include a fixed clamp seat and a movable clamp seat arranged vertically opposite to each other, the movable clamp seat is hung on a linear slide rail fixed on the first slide and vertically extended, the movable clamp seat is further in transmission connection with a clamping cylinder fixed on the first slide, the clamping cylinder is used to drive the movable clamp seat to slide along the linear slide rail, a follow-up cam is fixed on the movable clamp seat, the follow-up cam is further in rolling contact with a guide cam seat arranged on one lateral side of the first feeding clamp assembly and the second feeding clamp assembly, a lower clamp plate and an upper clamp plate are respectively fixed on the longitudinal front ends of the fixed clamp seat and the movable clamp seat, a clamp gap for passing the corresponding pole piece is formed between the upper clamp plate and the lower clamp plate, wherein the follow-up cam, the guide cam seat and the clamping cylinder cooperatively control the movable clamp seat to drive the upper clamp plate to open and close relative to the lower clamp plate, so that the upper clamp plate and the lower clamp plate clamp the first pole piece or the second pole piece.

[0011] In one of the embodiments, the guide cam seat is connected with the base or the panel of the lithium battery winding machine through a support plate, the length direction of the guide cam seat is parallel to the moving direction of the first feeding clamp assembly and the second feeding clamp assembly, and the guide length of the guide cam seat is not less than the length required for the first feeding clamp assembly and the second feeding clamp assembly to accelerate to synchronize with the feeding of the first pole piece and the second pole piece.

[0012] In one of the embodiments, the cutter assembly includes a mounting frame fixed on the second slide, the mounting frame is provided with a fixed cutter seat and a movable cutter seat arranged vertically opposite to each other, the movable cutter seat is arranged directly below the fixed cutter seat and is movably connected with the mounting frame through a guide column, the movable cutter seat is further in transmission connection with a jump cutting driving unit arranged on the second slide, the fixed cutter seat and the movable cutter seat are respectively provided with a fixed cutter and a movable cutter, wherein the jump cutting driving unit is used to drive the movable cutter seat to move the movable cutter relative to the fixed cutter after the cutter assembly is driven to the cutting station, so as to synchronously cut the first pole piece and the second pole piece.

[0013] In one of the embodiments, the jump-cut driving unit comprises a cam transmission assembly and a reset cylinder, the cam transmission assembly comprises a driving motor, a cam rotating block and a track bearing, the driving motor is fixed on the second sliding seat, the cam rotating block is arranged on the output shaft of the driving motor and is in rolling connection with the track bearing, the track bearing is connected with the moving knife holder at the end away from the cam rotating block, and the reset cylinder is fixed on the second sliding seat and the piston rod of the reset cylinder is connected with the moving knife holder, wherein the reset cylinder is used to pull the moving knife holder so that the moving knife holder drives the moving knife to open relative to the fixed knife; the driving motor is used to drive the track bearing to gap-lift the moving knife holder through the cam rotating block, so as to drive the moving knife holder to drive the moving knife to open and close relative to the fixed knife and to synchronously cut the first pole piece and the second pole piece.

[0014] In one of the embodiments, the cutter assembly further comprises a pole piece positioning detection assembly and a dust removal assembly, wherein the pole piece positioning detection assembly comprises a bracket, two oppositely arranged guide plates and a sensor, the bracket is fixed on the mounting frame, the two guide plates are fixed on the bracket, a channel for the first pole piece or the second pole piece to pass through is formed between the two guide plates, and the sensor is fixed on the bracket and located outside the guide plates, the sensor is used to sense the position of the first pole piece or the second pole piece passing through the channel; the dust removal assembly comprises a dust removal pipe for adsorbing the dust generated in the pole piece cutting process through negative pressure, and the pipe opening of the dust removal pipe is arranged towards the cutting station.

[0015] In the second aspect, the embodiments of the present application provide a lithium battery winding machine comprising the multi-pole piece feeding and cutting mechanism of the first aspect.

[0016] Compared with the related art, the multi-pole piece feeding and cutting mechanism and the lithium battery winding machine provided by the embodiments of the present application have the following advantages: the first sliding seat and the second sliding seat are arranged in front and back, the first feeding clamp assembly and the second feeding clamp assembly are arranged on the first sliding seat, so that the first sliding seat drives the first feeding clamp assembly and the second feeding clamp assembly to move synchronously, and the first feeding clamp assembly and the second feeding assembly are arranged to automatically clamp the first pole piece and the second pole piece after moving with the first sliding seat to be synchronous with the first pole piece and the second pole piece, thereby shortening the feeding time and improving the feeding efficiency; the cutter assembly is arranged on the second sliding seat, and the cutter assembly is driven by the second sliding seat to cut the first pole piece and the second pole piece, thereby realizing synchronous cutting of the first pole piece and the second pole piece, saving installation space by arranging one cutter assembly, and performing accurate cutting of the first pole piece and the second pole piece by synchronous cutting. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1A perspective view of a multi-pole piece feeding and cutting mechanism according to an embodiment of the present application;

[0018] Figure 2 Another perspective view of a multi-pole piece feeding and cutting mechanism according to an embodiment of the present application

[0019] Figure 3 An assembly view of a feeding driving assembly and a cutting driving assembly and a base plate according to an embodiment of the present application;

[0020] Figure 4 An assembly view of a first feeding clamp assembly, a second feeding clamp assembly, a first sliding base, a base and a feeding driving assembly according to an embodiment of the present application;

[0021] Figure 5 An assembly view of a first feeding clamp assembly, a second feeding clamp assembly and a first sliding base according to an embodiment of the present application;

[0022] Figure 6 An assembly view of a cutting tool assembly, a second sliding base and a base according to an embodiment of the present application;

[0023] Figure 7 Another assembly view of a cutting tool assembly, a second sliding base and a base according to an embodiment of the present application;

[0024] Figure 8 An assembly view of a cutting tool assembly and a second sliding base according to an embodiment of the present application;

[0025] Figure 9 Another assembly view of a cutting tool assembly and a second sliding base according to an embodiment of the present application.

[0026] Reference signs:

[0027] 100, base; 800

[0028] 200, first sliding base;

[0029] 300, second sliding base;

[0030] 400, first feeding clamp assembly; 41, fixed clamp base; 42, movable clamp base; 43, linear slide rail; 44, clamping cylinder; 45, follow-up cam; 46, guide cam base; 47, lower clamp plate; 48, upper clamp plate; 49, support plate;

[0031] 500, second feeding clamp assembly;

[0032] 600, cutter assembly; 61, mounting frame; 62, fixed knife seat; 63, movable knife seat; 64, guide column; 65, skip drive unit; 66, fixed knife; 67, movable knife; 68, pole piece positioning detection assembly; 69, dust removal assembly; 651, cam transmission assembly; 652, reset cylinder; 653, drive motor; 654, cam rotating block; 655, track bearing; 681, bracket; 682, guide plate; 683, sensor; 684, first group of sensors; 685, second group of sensors; 686, third group of sensors; 691, dust removal pipe;

[0033] 700, guide device;

[0034] 800, feeding drive assembly; 81, transmission unit; 82, drive unit;

[0035] 900, skip drive assembly;

[0036] 110, first transmission plate;

[0037] 120, second transmission plate. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] It should be noted that when a component is referred to as "mounted on" another component, it can be directly mounted on the other component or there can be a middle component. When a component is referred to as "provided on" another component, it can be directly provided on the other component or there can be a middle component. When a component is referred to as "fixed on" another component, it can be directly fixed on the other component or there can be a middle component.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein only for the purpose of describing specific embodiments of the present application, and is not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0041] Please refer to Figures 1 to 9The multi-pole piece feeding and cutting mechanism of the embodiment of the application comprises a base 100, the base 100 is provided with a first sliding seat 200 and a second sliding seat 300 arranged in front of and behind each other in the longitudinal direction, the first sliding seat 200 is provided with a first feeding clamp assembly 400 and a second feeding clamp assembly 500 arranged side by side in the transverse direction, the second sliding seat 300 is provided with a cutter assembly 600 movably connected with the first feeding clamp assembly 400 and the second feeding clamp assembly 500, wherein,

[0042] The first feeding clamp assembly 400 and the second feeding clamp assembly 500 are used for moving along with the first sliding seat 200 in the longitudinal direction, and after moving along with the first sliding seat 200 to be synchronized with the first pole piece and the second pole piece in feeding, the first feeding clamp assembly 400 and the second feeding clamp assembly 500 respectively clamp the first pole piece and the second pole piece and respectively feed the clamped first pole piece and second pole piece to the cutter assembly 600.

[0043] The cutter assembly 600 is used for moving along with the second sliding seat 300 in the longitudinal direction, and after moving along with the second sliding seat 300 and accelerating to be synchronized with the speed of the first pole piece and the second pole piece passing through the cutter assembly 600, the cutter assembly 600 synchronously cuts off the first pole piece and the second pole piece in the cutting station.

[0044] In the embodiment, when the first pole piece and the second pole piece are fed, the first sliding seat 200 is driven to move in the longitudinal direction and drives the first feeding clamp assembly 400 and the second feeding clamp assembly 500 to move towards the cutter assembly 600, that is, the first sliding seat 200 is driven to drive the first feeding clamp assembly 400 and the second feeding clamp assembly 500 to accelerate forward, when the speed is synchronized with the first pole piece and the second pole piece, the first feeding clamp assembly 400 and the second feeding clamp assembly 500 are triggered to clamp the first pole piece and the second pole piece respectively (the corresponding trigger mechanism will be described in detail later), the first feeding clamp assembly 400 and the second feeding clamp assembly 500 clamp the corresponding pole piece and are driven to continue moving towards the cutter assembly 600 at the same time. At the same time, the second sliding seat 300 is driven to drive the cutter assembly 600 to accelerate to the speed synchronized with the first pole piece and the second pole piece, and then the cutter assembly 600 is driven to synchronously cut off the first pole piece and the second pole piece, after the first pole piece and the second pole piece are cut off, the second sliding seat 300 is driven to drive the cutter assembly 600 to decelerate until it stops, and the first sliding seat 200 continues to drive the first feeding clamp assembly 400 and the second feeding clamp assembly 500 to send the pole piece downward at a constant speed, and then decelerate until the pole piece feeding position is reached; after the pole piece head compensation roller of the lithium battery winding machine completes compensation (pole piece pre-winding) and the straight pulling deviation correction station clamps the first pole piece and the second pole piece in feeding, the first feeding clamp assembly 400 and the second feeding clamp assembly 500 release the clamping of the first pole piece and the second pole piece, and then the first sliding seat 200 drives the first feeding clamp assembly 400 and the second feeding clamp assembly 500, and the second sliding seat 300 drives the cutter assembly 600 to retreat to the initial position at the same time.

[0045] In the above multi-pole piece feeding and cutting mechanism, the first slide 200 and the second slide 300 are arranged in front and back, and the first feeding clamp assembly 400 and the second feeding clamp assembly 500 are arranged on the first slide 200, so that the first slide 200 drives the first feeding clamp assembly 400 and the second feeding clamp assembly 500 to move synchronously, and the first feeding clamp assembly 400 and the second feeding assembly 500 are arranged to automatically clamp the first pole piece and the second pole piece after moving to synchronization with the first pole piece and the second pole piece with the first slide 200, thereby shortening the feeding time and improving the feeding efficiency; the cutter assembly 600 is arranged on the second slide 300, and the cutter assembly 600 is driven by driving the second slide 300 to cut the first pole piece and the second pole piece, so as to realize synchronous cutting of the first pole piece and the second pole piece. One cutter assembly 600 is arranged for synchronous cutting, which saves installation space and provides cutting accuracy.

[0046] In the embodiment, the inner and outer feeding clamps (the first feeding clamp assembly 400 and the second feeding clamp assembly 500) feed simultaneously, and the first pole piece and the second pole piece are clamped by the first feeding clamp assembly 400 and the second feeding clamp assembly 500 for uniform feeding and deceleration until the pole piece feeding position (abutting with the cutter assembly 600) is reached, so as to realize compensation of the tail length of the first pole piece and the second pole piece and ensure the head accuracy of the pole piece. Meanwhile, the first feeding clamp assembly 400, the second feeding clamp assembly 500 and the cutter assembly 600 are vertically installed, the structural parts of the first feeding clamp assembly 400, the second feeding clamp assembly 500 and the cutter assembly 600 are suspended, and the stability of the mechanism and the equipment is enhanced.

[0047] To realize driving the first slide 200 and the second slide 300 to slide longitudinally for feeding and cutting, in some embodiments, referring to Figures 1 to 4 , Figures 6 to 7 The base 100 is further provided with a guide device 700 extending in the longitudinal direction, and the first slide 200 and the second slide 300 are movably connected with the guide device 700. The first slide 200 is further transmissionally connected with the feeding drive assembly 800 through the first transmission plate 110, and the second slide 300 is further transmissionally connected with the cutting drive assembly 900 through the second transmission plate 120, wherein

[0048] The feeding drive assembly 800 is used for driving the first slide 200 to drive the first feeding clamp assembly 400 and the second feeding clamp assembly 500 to slide along the guide device 700, so that the first feeding clamp assembly 400 and the second feeding clamp assembly 500 respectively clamp the first pole piece and the second pole piece after accelerating to synchronization with the first pole piece and the second pole piece in feeding, and respectively feed the clamped first pole piece and second pole piece to the cutter assembly 600, and drive the first feeding clamp assembly 400 and the second feeding clamp assembly 500 to retreat to the initial position after completing feeding.

[0049] In the embodiment, the feeding driving assembly 800 drives the first sliding base 200 to move along the longitudinal direction, and drives the first feeding clamp assembly 400 and the second feeding clamp assembly 500 to accelerate towards the cutter assembly 600. When the acceleration reaches the synchronous speed with the first pole piece and the second pole piece, the feeding driving assembly 800 maintains the driving of the first sliding base 200 to move at a constant speed, so that the first feeding clamp assembly 400 and the second feeding clamp assembly 500 clamp the corresponding pole pieces to be conveyed downwards. Then, the feeding driving assembly 800 drives the first sliding base 200 to decelerate until the pole piece feeding position is reached. After the pole piece feeding position is reached and the first feeding clamp assembly 400 and the second feeding clamp assembly 500 are loosened, the feeding driving assembly 800 drives the first sliding base 200 to drive the first feeding clamp assembly 400 and the second feeding clamp assembly 500 to retreat to the initial position.

[0050] The cutting driving assembly 900 is used to drive the second sliding base 300 to drive the cutter assembly 600 to slide along the guide device 700, so that the cutter assembly 600 cuts the first pole piece and the second pole piece passing through the cutter assembly 600, and drives the cutter assembly 600 to decelerate and stop after cutting is completed, and retreats to the initial position.

[0051] In the embodiment, the cutting driving assembly 900 drives the second sliding base 300 to move along the longitudinal direction, so as to drive the cutter assembly 600 to accelerate to the synchronous speed with the first pole piece and the second pole piece. Then, after the cutter assembly 600 synchronously cuts the first pole piece and the second pole piece, the cutting driving assembly 900 drives the second sliding base 300 to drive the cutter assembly 600 to decelerate until it stops, and then drives the cutter assembly 600 to retreat to the initial position.

[0052] In some optional embodiments, the guide device 700 includes but is not limited to a linear guide rail; the feeding driving assembly 800 and the cutting driving assembly 900 each include a transmission unit 81 and a driving unit 82. The transmission unit 81 is longitudinally arranged at the bottom of the base 100, and is in transmission connection with the driving unit 82. The transmission unit 81 of the feeding driving assembly 800 is in transmission connection with the first sliding base 200, and the transmission unit 81 of the cutting driving assembly 900 is in transmission connection with the second sliding base 300. The driving unit 82 is used to drive the transmission unit 81 to drive the first sliding base 200 or the second sliding base 300 to slide along the guide device 700.

[0053] In the embodiment, the transmission unit 81 includes but is not limited to a ball screw, and the driving unit 82 includes but is not limited to a driving motor.

[0054] In order to clamp the first pole piece and the second pole piece, in some embodiments, the first feeding clamp assembly 400 and the second feeding clamp assembly 500 each include a first clamp 410 and a second clamp 510. The first clamp 410 and the second clamp 510 are arranged on the first feeding base 420 and the second feeding base 520 respectively, and are used to clamp the first pole piece and the second pole piece. Figures 1 to 2 、 Figures 4 to 5The first feeding clamp assembly 400 and the second feeding clamp assembly 500 each include a fixed clamp seat 41 and a movable clamp seat 42 arranged opposite to each other, the movable clamp seat 42 is hung on a linear slide rail 43 fixed on the first slide base 200 and vertically extending, the movable clamp seat 42 is further in transmission connection with a clamping cylinder 44 fixed on the first slide base 200, the clamping cylinder 44 is used for driving the movable clamp seat 42 to slide along the linear slide rail 43, a follow-up cam 45 is fixed on the movable clamp seat 42, the follow-up cam 45 is further in rolling contact with a guide cam seat 46 arranged on one lateral side of the first feeding clamp assembly 400 and the second feeding clamp assembly 500, the longitudinal front ends of the fixed clamp seat 41 and the movable clamp seat 42 are respectively fixed with a lower clamp plate 47 and an upper clamp plate 48, the upper clamp plate 48 and the lower clamp plate 47 form a clamp gap for the corresponding pole piece to pass through, wherein, the follow-up cam 45, the guide cam seat 46 and the clamping cylinder 44 cooperatively control the movable clamp seat 42 to drive the upper clamp plate 48 to open and close relative to the lower clamp plate 47, so that the upper clamp plate 48 and the lower clamp plate 47 clamp the first pole piece or the second pole piece.

[0055] In the embodiment, the lower clamp plate 47 of the first feeding clamp assembly 400 and the second feeding clamp assembly 500 is fixed, the upper clamp plate 48 vertically moves with the clamping cylinder 44, the clamping cylinder 44 is always in an extended state, when the follow-up cam 45 moves with the first feeding clamp assembly 400 or the second feeding clamp assembly 500, the follow-up cam 45 first rolls horizontally along the guide cam seat 46, at this time, the movable clamp seat 42 and the upper clamp plate 48 do not vertically move, when the first feeding clamp assembly 400 or the second feeding clamp assembly 500 accelerates to be synchronous with the corresponding pole piece (linear velocity is equal), the follow-up cam 45 rolls along the inclined surface of the guide cam seat 46 or even rolls off the guide cam seat 46, the movable clamp seat 42 and the upper clamp plate 48 push the fixed clamp seat 41 and the lower clamp plate 47 to move under the pushing force of the clamping cylinder 44, so that the upper clamp plate 48 and the lower clamp plate 47 clamp the corresponding pole piece.

[0056] It can be understood that, in this way, the follow-up cam 45 rolls along the guide cam seat 46 by following the movement of the first feeding clamp assembly 400 and the second feeding clamp assembly 500, when the first feeding clamp assembly 400 and the second feeding clamp assembly 500 accelerate to be synchronous with the first pole piece and the second pole piece in feeding, the follow-up cam 45 rolls off the guide cam seat 46 and is separated from the guide cam seat 46, the upper clamp plate 48 directly clamps and presses the corresponding pole piece under the pushing force provided by the extension of the clamping cylinder 44, without the need to set a separate control device to control the upper clamp plate 48 and the lower clamp plate 47 to clamp the pole piece, so as to shorten the feeding time by shortening the time of clamping the pole piece, and improve the feeding efficiency.

[0057] It should be noted that in the embodiment, the guide cam seat 46 with a matching length is arranged to control the distance between the follower cam 45 and the guide cam seat 46 to match the displacement of the first feeding clamp assembly 400 and the second feeding clamp assembly 500 accelerating to the synchronous movement of the first pole piece and the second pole piece in feeding, so as to satisfy that when the two feeding clamp assemblies move to be synchronous with the pole piece, the first feeding clamp assembly 400 and the second feeding clamp assembly 500 can clamp the first pole piece and the second pole piece, and there is no need to arrange a corresponding control device to control the two feeding clamp assemblies to clamp the pole piece; in the embodiment, the lower clamp plate 47 and the upper clamp plate 48 with a relatively long length are also arranged to increase the clamping area and ensure that the corresponding pole piece can be effectively clamped to avoid the lower clamp plate 47 and the upper clamp plate 48 from loosening relative to the pole piece after clamping the pole piece; at the same time, the clamp plate with a relatively long length also has a pole piece guiding effect to avoid the pole piece from sagging after the head of the pole piece is cut off to cause the pole piece to be unable to enter the material.

[0058] To realize the accurate control of the two feeding clamp assemblies clamping the first pole piece or the second pole piece, in some embodiments, referring to Figures 1 to 5 , the guide cam seat 46 is connected with the base 100 or the panel of the lithium battery winding machine through the support plate 49, the length direction of the guide cam seat 46 is parallel to the moving direction of the first feeding clamp assembly 400 and the second feeding clamp assembly 500, and the guide length of the guide cam seat 46 is not less than the length required for the first feeding clamp assembly 400 and the second feeding clamp assembly 500 to accelerate to be synchronous with the first pole piece and the second pole piece in feeding.

[0059] It should be noted that in the embodiment, the guide cam seat 46 is divided into a plane section and an inclined section in the length direction, the plane section is located at the same height as the height of the follower cam 45 when the upper clamp plate 48 and the lower clamp plate 47 are opened, the inclined section gradually decreases from the height of the plane section, when the follower cam 45 is in the plane section, the follower cam 45 and the movable clamp seat 42 are both away from the fixed clamp seat 41, that is, the upper clamp plate 48 and the lower clamp plate 47 are opened; when the follower cam 45 is in the inclined section, the follower cam 45 and the movable clamp seat 42 gradually approach the fixed clamp seat 41, so that the gap between the upper clamp plate 48 and the lower clamp plate 47 gradually decreases, and when the follower cam 45 completely separates from the guide cam seat 46, the upper clamp plate 48 and the lower clamp plate 47 completely clamp the first pole piece or the second pole piece in the gap.

[0060] To realize the cutting of the pole piece, in some embodiments, referring to Figures 1 to 2 、 Figures 6 to 9The cutting knife assembly 600 comprises a mounting frame 61 fixed on the second sliding base 300, the mounting frame 61 is provided with a fixed knife seat 62 and a movable knife seat 63 arranged oppositely in an up-down direction, the movable knife seat 63 is arranged directly below the fixed knife seat 62 and is movably connected with the mounting frame 61 through a guide column 64, the movable knife seat 63 is further transmissionally connected with a jump cutting driving unit 65 arranged on the second sliding base 300, the fixed knife seat 62 and the movable knife seat 63 are respectively provided with a fixed blade 66 and a movable blade 67, wherein,

[0061] The jump cutting driving unit 65 is used for driving the movable blade 67 to move towards the fixed blade 66 to synchronously cut the first pole piece and the second pole piece after the cutting knife assembly 600 is driven to the cutting station.

[0062] In some optional embodiments, the jump cutting driving unit 65 comprises a cam transmission assembly 651 and a reset air cylinder 652, the cam transmission assembly 651 comprises a driving motor 653, a cam rotating block 654 and a track bearing 655, the driving motor 653 is fixed on the second sliding base 300, the cam rotating block 654 is arranged on an output shaft of the driving motor 653 and is rollingly connected with the track bearing 655, an end of the track bearing 655 away from the cam rotating block 654 is connected with the movable knife seat 63, the reset air cylinder 652 is fixed on the second sliding base 300, and a piston rod of the reset air cylinder 652 is connected with the movable knife seat 63, wherein,

[0063] The reset air cylinder 652 is used for pulling the movable knife seat 63 to drive the movable blade 67 to open relative to the fixed blade 66.

[0064] The driving motor 653 is used for driving the track bearing 655 to intermittently lift the movable knife seat 63 through the cam rotating block 654 to drive the movable blade 67 to open or close relative to the fixed blade 66 and to synchronously cut the first pole piece and the second pole piece.

[0065] In the present embodiment, the reset air cylinder 652 is connected with the movable knife seat 63 and is connected with the movable blade 67, the reset air cylinder 652 is always in a retracted state, that is, the movable blade 67 is always in an open state relative to the fixed blade 66, the track bearing 655 on the other side is always connected with the movable knife seat 63 and the movable blade 67, when the driving motor 653 controls the cam rotating block 654 to rotate, the track bearing 655 overcomes the pulling force output by the reset air cylinder 652 to perform intermittent linear motion, thereby cutting the first pole piece and the second pole piece, after the first pole piece and the second pole piece are cut, the track bearing 655 opens the movable blade 67 in response to the pulling force output by the reset air cylinder 652 and the vertical lifting generated by the eccentric swing of the cam, and the opening and closing of the movable blade 67 and the fixed blade 66 is realized through the above-mentioned repeated process.

[0066] In the embodiment, the cutting of the first and second pole pieces is performed by the same cutter, so that the first and second pole pieces are simultaneously cut by the cutter, ensuring the accuracy of the cutting and maintaining the consistency of the products.

[0067] In some embodiments, the cutter assembly 600 further comprises a pole piece positioning detection assembly 68 and a dust removal assembly 69, wherein,

[0068] The pole piece positioning detection assembly 68 comprises a bracket 681, two guide plates 682 oppositely arranged, and a sensor 683. The bracket 681 is fixed on the mounting frame 61, the two guide plates 682 are fixed on the bracket 681, and a channel for the first or second pole piece to pass through is formed between the two guide plates 682. The sensor 683 is fixed on the bracket 681 and located outside the guide plates 682. The sensor 683 is used to sense the position of the first or second pole piece on the belt.

[0069] In the embodiment, the pole piece positioning detection assembly 68 detects the number of pole ears, the distance between the pole ears, and the position of the pole ears to locate the position of the corresponding pole piece to be cut, so that the pole piece can be accurately cut and the length of the pole piece is ensured.

[0070] In the embodiment, the sensor 683 is provided with three groups, each group of sensors 683 is composed of a pair of photoelectric sensors arranged left and right, the first group of sensors 684 and the third group of sensors 686 are located at the same height and are used to detect the number of pole pieces and the distance between the pole ears, and the second group of sensors 685 is arranged below the first group of sensors 684 and is used to accurately detect the position of the pole piece. After the first group of sensors 684 and the third group of sensors 686 detect the corresponding number of pole ears and the position of the pole piece, the second group of sensors 685 detects the position of the pole piece, and then the jump cutting driving unit 65 controls the moving cutter 67 to cut the first or second pole piece. The cutting position can be accurately controlled to ensure that the length of the pole piece meets the requirements. In the embodiment, the initial position is that the first feeding clamp assembly 400, the second feeding clamp assembly 500, and the cutter assembly 600 are located at the upper limit position. After the pole piece positioning detection assembly 68 detects the corresponding position of the pole ear of the first or second pole piece, the first sliding seat 200 is driven by the feeding driving assembly 800 to drive the first feeding clamp assembly 400 and the second feeding clamp assembly 500, and the second sliding seat 300 is driven by the jump cutting driving assembly 900 to drive the cutter assembly 600 to move downward and keep synchronous movement with the pole piece in the conveying. After the first feeding clamp assembly 400 and the second feeding clamp assembly 500 are synchronized with the corresponding pole piece, the follow-up cam 45 of the first feeding clamp assembly 400 and the second feeding clamp assembly 500 is separated from the guide cam seat 46, so that the first feeding clamp assembly 400 and the second feeding clamp assembly 500 clamp the first pole piece and the second pole piece respectively. After the corresponding pole piece is clamped, the cutter assembly 600 synchronously cuts the first pole piece and the second pole piece, and then the cutter assembly 600 slows down and stops.

[0071] In the embodiment, the dust removal assembly 69 comprises a dust removal pipe 691 for adsorbing the dust generated in the cutting process of the polar sheet, and the pipe opening of the dust removal pipe 691 is arranged towards the cutting station.

[0072] In the embodiment, the dust removal pipe 691 at the cutting station can effectively adsorb the dust generated in the cutting process of the polar sheet, so as to avoid the dust from adhering to the polar sheet and affecting the quality of the battery cell.

[0073] The embodiment of the application further provides a lithium battery winding machine comprising the polar sheet feeding and cutting mechanism in the above embodiment.

[0074] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0075] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as the limitation of the present application, and as long as the above embodiments are appropriately changed and varied within the scope of the present application, they fall within the scope of the present application.

Claims

1. A multi-pole blade feeding and cutting mechanism, characterized by, The base (100) is provided with a first sliding seat (200) and a second sliding seat (300) arranged in front and back in the longitudinal direction, the first sliding seat (200) is provided with a first feeding clamp assembly (400) and a second feeding clamp assembly (500) arranged side by side in the transverse direction, the second sliding seat (300) is provided with a cutter assembly (600) which is movably connected with the first feeding clamp assembly (400) and the second feeding clamp assembly (500), wherein, The first feeding clamp assembly (400) and the second feeding clamp assembly (500) are used for moving along with the first sliding seat (200) in the longitudinal direction, and after moving along with the first sliding seat (200) to synchronize with the first pole piece and the second pole piece in feeding, the first pole piece and the second pole piece are respectively clamped, and the clamped first pole piece and the second pole piece are respectively sent to the cutter assembly (600); The cutter assembly (600) is used for moving along with the second sliding seat (300) in the longitudinal direction, and after moving and accelerating along with the second sliding seat (300) to synchronize with the speed of the first pole piece and the second pole piece passing through the cutter assembly (600), the first pole piece and the second pole piece are synchronously cut off at the cutting station.

2. The multi-pole blade feeding and cutting mechanism according to claim 1, characterized in that, The base (100) is further provided with a guide device (700) extending in the longitudinal direction, the first sliding seat (200) and the second sliding seat (300) are movably connected with the guide device (700), the first sliding seat (200) is further transmissionally connected with a feeding driving assembly (800) through a first transmission plate (110), and the second sliding seat (300) is further transmissionally connected with a cutting chasing driving assembly (900) through a second transmission plate (120), wherein, The feeding driving assembly (800) is used for driving the first sliding seat (200) to drive the first feeding clamp assembly (400) and the second feeding clamp assembly (500) to slide along the guide device (700), so that the first feeding clamp assembly (400) and the second feeding clamp assembly (500) are respectively clamped after accelerating to synchronize with the first pole piece and the second pole piece in feeding, and the clamped first pole piece and the second pole piece are respectively sent to the cutter assembly (600), and the first feeding clamp assembly (400) and the second feeding clamp assembly (500) are driven to retreat to the initial position after completing feeding; The cutting chasing driving assembly (900) is used for driving the second sliding seat (300) to drive the cutter assembly (600) to slide along the guide device (700), so that the cutter assembly (600) cuts the first pole piece and the second pole piece passing through the cutter assembly (600), and the cutter assembly (600) is driven to decelerate and stop and retreat to the initial position after completing cutting.

3. The multi-pole blade feed-trimming mechanism of claim 2, wherein, The feeding driving assembly (800) and the cutting driving assembly (900) each comprise a transmission unit (81) and a driving unit (82), the transmission unit (81) is longitudinally arranged at the bottom of the base (100) and is in transmission connection with the driving unit (82), the transmission unit (81) of the feeding driving assembly (800) is in transmission connection with the first sliding seat (200), and the transmission unit (81) of the cutting driving assembly (900) is in transmission connection with the second sliding seat (300), wherein the driving unit (82) is used for driving the transmission unit (81) to drive the first sliding seat (200) or the second sliding seat (300) to slide in the guide device (700).

4. The multi-pole blade feeding and cutting mechanism according to claim 3, wherein, The transmission unit (81) comprises a ball screw, the driving unit (82) comprises a driving motor, and / or the guide device (700) comprises a linear guide rail.

5. The multi-pole blade feeding and cutting mechanism according to claim 2, wherein, The first feeding clamp assembly (400) and the second feeding clamp assembly (500) each comprise a fixed clamp seat (41) and a movable clamp seat (42) arranged opposite to each other, the movable clamp seat (42) is hung on a linear slide rail (43) fixed to the first sliding seat (200) and vertically extending, the movable clamp seat (42) is further in transmission connection with a clamping air cylinder (44) fixed to the first sliding seat (200), the clamping air cylinder (44) is used for driving the movable clamp seat (42) to slide along the linear slide rail (43), a follow-up cam (45) is fixed to the movable clamp seat (42), the follow-up cam (45) is further in rolling contact with a guide cam seat (46) arranged at a lateral side of the first feeding clamp assembly (400) and the second feeding clamp assembly (500), the longitudinal front ends of the fixed clamp seat (41) and the movable clamp seat (42) are respectively fixed with a lower clamp plate (47) and an upper clamp plate (48), and a clamp gap for passing through a corresponding pole piece is formed between the upper clamp plate (48) and the lower clamp plate (47), wherein the follow-up cam (45), the guide cam seat (46) and the clamping air cylinder (44) cooperatively control the movable clamp seat (42) to drive the upper clamp plate (48) to open and close relative to the lower clamp plate (47), so that the upper clamp plate (48) and the lower clamp plate (47) clamp a first pole piece or a second pole piece.

6. The multi-pole blade feeding and cutting mechanism according to claim 5, wherein, The guide cam seat (46) is connected with the base (100) or a panel of a lithium battery winding machine through a support plate (49), the length direction of the guide cam seat (46) is parallel to the moving direction of the first feeding clamp assembly (400) and the second feeding clamp assembly (500), and the guide length of the guide cam seat (46) is not less than the length required for the first feeding clamp assembly (400) and the second feeding clamp assembly (500) to accelerate to synchronization with the first pole piece and the second pole piece in feeding.

7. The multi-pole blade feeding and cutting mechanism according to claim 2, wherein The cutting knife assembly (600) comprises a mounting frame (61) fixed on the second slide (300), the mounting frame (61) is provided with a fixed knife seat (62) and a movable knife seat (63) arranged opposite to each other, the movable knife seat (63) is arranged directly below the fixed knife seat (62) and is movably connected with the mounting frame (61) through a guide column (64), the movable knife seat (63) is further drivingly connected with a jump cutting driving unit (65) arranged on the second slide (300), the fixed knife seat (62) and the movable knife seat (63) are respectively provided with a fixed knife (66) and a movable knife (67), wherein, The jump cutting driving unit (65) is used for driving the movable knife seat (63) to move the movable knife (67) towards the fixed knife (66) to synchronously cut the first pole piece and the second pole piece after the cutting knife assembly (600) is driven to the cutting position.

8. The multi-pole blade feeding and cutting mechanism according to claim 7, wherein, The jump cutting driving unit (65) comprises a cam driving assembly (651) and a reset air cylinder (652), the cam driving assembly (651) comprises a driving motor (653), a cam rotating block (654) and a track bearing (655), the driving motor (653) is fixed on the second slide (300), the cam rotating block (654) is arranged on an output shaft of the driving motor (653) and is rollingly connected with the track bearing (655), one end of the track bearing (655) away from the cam rotating block (654) is connected with the movable knife seat (63), the reset air cylinder (652) is fixed on the second slide (300) and a piston rod of the reset air cylinder (652) is connected with the movable knife seat (63), wherein, The reset air cylinder (652) is used for pulling the movable knife seat (63) to make the movable knife seat (63) drive the movable knife (67) to open relative to the fixed knife (66); The driving motor (653) is used for driving the track bearing (655) to gapwise lift the movable knife seat (63) through the cam rotating block (654) to drive the movable knife seat (63) to drive the movable knife (67) to open and close relative to the fixed knife (66) and to synchronously cut the first pole piece and the second pole piece.

9. The multi-pole blade feeding and cutting mechanism according to claim 7, wherein, The cutting knife assembly (600) further comprises a pole piece positioning detection assembly (68) and a dust removal assembly (69), wherein, The pole piece positioning detection assembly (68) comprises a bracket (681), two oppositely arranged guide plates (682) and a sensor (683), the bracket (681) is fixed on the mounting frame (61), the two guide plates (682) are fixed on the bracket (681), a channel for the first pole piece or the second pole piece to pass through is formed between the two guide plates (682), the sensor (683) is fixed on the bracket (681) and located outside the guide plates (682), the sensor (683) is used for sensing the position of the first pole piece or the second pole piece passing through the channel. The dust removal assembly (69) comprises a dust removal pipe (691) for removing the dust generated in the process of cutting off by the negative pressure adsorption of the electrode piece, and the pipe opening of the dust removal pipe (691) is arranged towards the cutting station.

10. A lithium battery winder characterized by, The multi-electrode piece feeding and cutting mechanism comprises the dust removal assembly (69).

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