Diaphragm cutting and ending mechanism for multiple battery cells and lithium battery winding machine

Abstract

The utility model discloses a diaphragm cutting and ending mechanism for multiple battery cells and a lithium battery winding machine, the diaphragm cutting and ending mechanism comprises a mounting rack, a diaphragm cutting assembly and a diaphragm ending compression roller assembly, and the diaphragm cutting assembly comprises a plurality of diaphragm pressing units and diaphragm cutters which are arranged side by side; the diaphragm cutter is arranged between the upper pressing rollers and the lower pressing rollers of the plurality of diaphragm pressing units, and the diaphragm ending pressing roller assembly comprises a plurality of ending rolling units which are arranged in parallel. A plurality of film pressing units synchronously drive corresponding upper pressing rollers and lower pressing rollers to move to press diaphragms of the corresponding battery cells, and diaphragm cutters cut off the diaphragms of the multiple battery cells from corresponding cutting positions at a time; and after the plurality of battery cells are shifted to the second station along with the corresponding winding needles, the plurality of ending rolling units respectively move towards the corresponding battery cells so as to press the corresponding battery cells to perform diaphragm ending winding.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery manufacturing technical field especially for the diaphragm cutting tailing mechanism and lithium battery winding machine of many electric cores. BACKGROUND

[0002] Lithium battery as the current kind of widely used energy, because its small size, energy density, long service life, little environmental pollution and so on, is widely used in new energy automobile and all big energy storage field.

[0003] In the related art, winding machine is single diaphragm cutting tailing, that is, only one electric core can be cut off and tailing operation processing at a time, and the existing electric core process can only be cut off to perform the electric core tailing work, so that the overall processing efficiency of the winding machine using the single diaphragm cutting tailing mode is low.

[0004] At present, there is no effective solution to the problem of low overall processing efficiency of the winding machine using the single diaphragm cutting tailing mode in the related art. INVENTION CONTENTS

[0005] Therefore, it is necessary to provide a diaphragm cutting tailing mechanism for multiple electric cores and a lithium battery winding machine to at least solve the problem of low overall processing efficiency of the winding machine using the single diaphragm cutting tailing mode in the related art.

[0006] In a first aspect, the utility model provides a technical scheme as follows: a diaphragm cutting tailing mechanism for multiple electric cores, characterized in that it comprises a mounting frame, a diaphragm cutting assembly and a diaphragm tailing compression roller assembly, the diaphragm cutting assembly is arranged on the upper part of the mounting frame, the diaphragm tailing compression roller assembly is arranged on the lower part of the mounting frame and below the diaphragm cutting assembly, the diaphragm cutting assembly comprises a plurality of side-by-side arranged film compression units and diaphragm cutters, the diaphragm cutters are arranged between the upper and lower compression rollers of the plurality of film compression units, the diaphragm tailing compression roller assembly comprises a plurality of tailing roller compression units arranged side by side, wherein after the winding needle at the first station completes synchronous winding of multiple electric cores and changes position to the second station, the plurality of film compression units synchronously drive the corresponding upper and lower compression rollers to move to press the diaphragm of the corresponding electric core, and the diaphragm cutter cuts off the diaphragm of the multiple electric cores from the corresponding cutting position at one time; after the multiple electric cores change position to the second station following the corresponding winding needle, the plurality of tailing roller compression units respectively move towards the corresponding electric core to press the corresponding electric core for diaphragm tailing winding.

[0007] In one of the embodiments, the diaphragm cutting assembly further comprises a first guide arranged on the upper bottom plate of the mounting frame, the first guide is provided with a sliding seat in transmission connection with a first driving unit, the first driving unit is capable of driving the sliding seat to slide along the first guide, a vertically movable adjusting load plate is arranged on the vertically side wall of the sliding seat, the front end of the load plate away from the vertically side wall is provided with a telescopic mounting seat, the upper pressing rollers of a plurality of the pressing film units are mounted on the fixed seat of the telescopic mounting seat, the diaphragm cutter is mounted on the movable seat of the telescopic mounting seat, and the lower pressing rollers of a plurality of the pressing film units are arranged on the front end of the sliding seat away from the vertically side wall, wherein the first driving unit is used to drive the sliding seat to move along the first guide with a plurality of the pressing film units and the diaphragm cutter, so that the upper pressing roller and the lower pressing roller of each of the pressing film units press the diaphragm of the corresponding battery cell, and the diaphragm cutter cuts the diaphragm of a plurality of battery cells from the corresponding cutting position at one time.

[0008] In one of the embodiments, the load plate is further provided with a bearing seat near the fixed seat, a transverse shaft penetrating through the fixed seat and out of the bearing seat is mounted in the bearing seat, and the movable seat is in transmission connection with a driving cylinder arranged on the load plate, wherein after a plurality of the pressing film units and the diaphragm cutter move to a preset position following the sliding seat, the driving cylinder is used to drive the movable seat to slide along the axial direction of the transverse shaft, so as to drive the diaphragm cutter to make a second cutting and cut the diaphragm of a plurality of battery cells from the corresponding cutting position at one time.

[0009] In one of the embodiments, the fixed seat is further provided with a first optical axis penetrating through the fixed seat and connected with a corresponding first pressing roller seat after penetrating out, and each of the first pressing roller seats is provided with one of the upper pressing rollers; the sliding seat is further provided with a second optical axis penetrating through the sliding seat and connected with a corresponding second pressing roller seat after penetrating out, and each of the second pressing roller seats is provided with one of the lower pressing rollers, and each of the second optical axes is further provided with a compression spring, and the two free ends of each of the compression springs respectively abut against the second pressing roller seat and the sliding seat, and the compression spring is used to buffer the second pressing roller seat, so as to gently press the corresponding lower pressing roller against the diaphragm of the corresponding battery cell.

[0010] In one of the embodiments, the first guide comprises a linear guide rail, and / or the first driving unit comprises one of a ball screw sliding table, a linear motor and a driving cylinder.

[0011] In one of the embodiments, the separator tailing and pressing roller assembly further comprises a second guide arranged on the lower bottom plate of the mounting frame, the second guide is provided with a sliding plate in transmission connection with a second driving unit, the second driving unit is capable of driving the sliding plate to slide along the second guide, the sliding plate is provided with a plurality of moving frames installed through shaft seats, the moving frames are further in transmission connection with a third driving unit for driving the moving frames to move, and the tailing and pressing roller units are arranged on the corresponding moving frames away from the front ends connected with the third driving unit, wherein the third driving unit is used for driving the corresponding moving frames to move the corresponding tailing and pressing roller units to perform secondary displacement for moving close to the corresponding battery cells after the second driving unit drives the sliding plate to perform primary displacement along the second guide, so as to press the corresponding battery cells for separator tailing and winding.

[0012] In one of the embodiments, the second guide comprises a linear guide rail, and / or the second driving unit and the third driving unit each comprise a driving cylinder.

[0013] In one of the embodiments, each of the tailing and pressing roller units comprises a tailing and pressing roller, a separator tailing and guiding roller, a pressing roller mounting seat and a guiding roller mounting seat, each of the moving frames is provided with two pressing roller mounting seats arranged in a longitudinal direction and spaced apart away from the front end connected with the corresponding third driving unit, the axial two ends of the tailing and pressing roller are respectively connected with the two pressing roller mounting seats, each of the pressing roller mounting seats is provided with a guiding roller mounting seat, the separator tailing and guiding roller is arranged above the corresponding tailing and pressing roller, and the axial two ends of the separator tailing and guiding roller are respectively connected with the corresponding guiding roller mounting seat.

[0014] In one of the embodiments, the separator cutting assembly comprises two pressing film units arranged side by side, and the separator tailing and pressing roller assembly comprises two tailing and pressing roller units arranged side by side.

[0015] In the second aspect, the utility model provides another technical scheme as follows: a lithium battery winding machine, comprising a separator cutting and tailing mechanism, the separator cutting and tailing mechanism is the separator cutting and tailing mechanism for multiple battery cells in the first aspect.

[0016] Compared with the related art, the application provides a separator cutting and ending mechanism for multiple battery cells and a lithium battery winding machine, which adopts a separator cutting assembly and a separator ending roller assembly arranged on the upper bottom plate and the lower bottom plate of a mounting frame respectively, the separator cutting assembly includes multiple pressing film units arranged side by side, and the separator cutter is arranged between the upper pressing roller and the lower pressing roller of the multiple pressing film units, and the separator ending roller assembly includes multiple ending roller pressing units arranged side by side; after the winding needle at the first station completes synchronous winding of multiple battery cells and changes position to the second station, the multiple pressing film units synchronously drive the corresponding upper pressing roller and the lower pressing roller to move to press the separator of the corresponding battery cell, and the separator of the multiple battery cells is cut off from the corresponding cutting position at one time by the separator cutter; after the multiple battery cells change position to the second station following the corresponding winding needle, the multiple ending roller pressing units move towards the corresponding battery cell to press the corresponding battery cell for separator ending winding, thereby solving the problem of low overall processing efficiency of the winding machine using the single separator cutting and ending method in the related art, realizing one-time cutting of multiple separators and ending of multiple battery cells, and improving the overall efficiency of the lithium battery winding machine.

[0017] Details of one or more embodiments of the application are presented in the following drawings and description to make other features, objects and advantages of the application more apparent. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a front view of the separator cutting and ending mechanism of the embodiment of the application.

[0019] Figure 2 It is a perspective structural schematic view of the separator cutting and ending mechanism of the embodiment of the application.

[0020] Figure 3 It is another perspective structural schematic view of the separator cutting and ending mechanism of the embodiment of the application.

[0021] Figure 4 It is a perspective structural schematic view of the separator cutting assembly of the embodiment of the application.

[0022] Figure 5 It is another perspective structural schematic view of the separator cutting assembly of the embodiment of the application.

[0023] Figure 6 It is a perspective structural schematic view of the separator ending roller assembly of the embodiment of the application.

[0024] REFERENCE SIGNS:

[0025] 001, first station; 002, second station;

[0026] 100, mounting frame; 11, upper bottom plate; 12, lower bottom plate;

[0027] 200, diaphragm cutting assembly; 21, film pressing unit; 22, diaphragm cutter; 23, first guide; 24, first driving unit; 25, sliding seat; 26, carrier plate; 27, telescopic mounting seat; 28, bearing seat; 29, driving cylinder; 201, first optical axis; 202, first pressure roller seat; 203, second optical axis; 204, second pressure roller seat; 205, compression spring; 211, upper pressure roller; 212, lower pressure roller; 251, vertical side wall; 271, fixed seat; 272, movable seat; 273, horizontal shaft;

[0028] 300, diaphragm tail-end pressure roller assembly; 31, tail-end roller pressing unit; 32, second guide; 33, second driving unit; 34, sliding plate; 35, shaft seat; 36, moving frame; 37, third driving unit; 311, tail-end pressure roller; 312, diaphragm tail-end guide roller; 313, pressure roller mounting seat; 314, guide roller mounting seat. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely 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. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0030] 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 "disposed on" another component, it can be directly disposed 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.

[0031] 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.

[0032] Please refer to Figures 1 to 6The film cutting and ending mechanism for multiple battery cells in the embodiment of the application comprises a mounting frame 100, a film cutting assembly 200 and a film ending roller assembly 300. The film cutting assembly 200 is arranged on the upper part of the mounting frame 100, and the film ending roller assembly 300 is arranged on the lower part of the mounting frame 100 and below the film cutting assembly 200. The film cutting assembly 200 comprises a plurality of film pressing units 21 arranged side by side and a film cutter 22 arranged between the upper pressing roller 211 and the lower pressing roller 212 of the plurality of film pressing units 21. The film ending roller assembly 300 comprises a plurality of ending roller pressing units 31 arranged side by side.

[0033] In the embodiment, the film cutting assembly 200 is provided with two film pressing units 21 arranged side by side, and the film cutter 22 is arranged between the upper pressing roller 211 and the lower pressing roller 212 of the two film pressing units 21. In the embodiment, the film ending roller assembly 300 is provided with two ending roller pressing units 31 arranged side by side.

[0034] After the winding needle at the first station 001 completes synchronous winding of the plurality of battery cells and changes position to the second station 002, the plurality of film pressing units 21 synchronously drive the corresponding upper pressing roller 211 and lower pressing roller 212 to move to press the film of the corresponding battery cell, and the film cutter 22 cuts the film of the plurality of battery cells from the corresponding cutting position at one time.

[0035] After the plurality of battery cells change position to the second station 002 following the corresponding winding needle, the plurality of ending roller pressing units 31 move towards the corresponding battery cells to press the corresponding battery cells for film ending winding.

[0036] In the embodiment, the winding needle at the first station 001 is for corresponding winding of the film, including pre-winding and post-insertion piece winding, and the winding needle at the second station 002 is for ending winding of the film. It should be understood that the change of position of the winding needle at the first station 001 and the second station 002 is a process of reciprocating in a loop, and therefore, the winding needles at the two stations alternately perform corresponding winding and ending winding of the film, that is, the winding needle performing corresponding winding at the current time performs ending winding after changing position, and the winding needle performing ending winding at the current time performs pre-winding and post-insertion piece winding of the film after changing position.

[0037] In the embodiment, the cutting of the diaphragm is performed after the roll pin is transposed from the first station 001 to the second station 002, and during the transposition of the roll pin, the roll pin pulls the diaphragm corresponding to the plurality of battery cells from the first station 001 to the second station 002, then the plurality of film pressing units 21 are driven to move towards the pulled diaphragm, and after the plurality of film pressing units 21 press the diaphragm corresponding to the battery cell, the diaphragm cutter 22 can cut the diaphragm of the plurality of battery cells from the corresponding cutting position at one time, and the cutting method of the diaphragm in the embodiment includes but is not limited to cold welding cutting, hot welding cutting.

[0038] In the embodiment, the cut and finished diaphragm is the diaphragm corresponding to the plurality of battery cells (for example, two), and when each film pressing unit 21 presses the diaphragm, it is pressed respectively, for example, the film pressing units 21 in the embodiment are defined as inner and outer film pressing units, after the roll pin located at the first station 001 completes the winding of the plurality of battery cells and is transposed to the second station 002, the upper and lower pressing rollers 211 and 212 of the inner film pressing unit press the diaphragm corresponding to the inner battery cell, and the upper and lower pressing rollers 211 and 212 of the outer film pressing unit press the diaphragm corresponding to the outer battery cell, and similarly, the finishing roller pressing unit 31 in the embodiment also performs the finishing work of the corresponding battery cell.

[0039] In the above diaphragm cutting and finishing mechanism for the plurality of battery cells, the diaphragm cutting assembly 200 and the diaphragm finishing roller assembly 300 are respectively arranged on the upper and lower bottom plates 11 and 12 of the mounting frame 100, the diaphragm cutting assembly 200 includes a plurality of film pressing units 21 arranged side by side, and the diaphragm cutter 22 is arranged between the upper and lower pressing rollers 211 and 212 of the plurality of film pressing units 21, and the diaphragm finishing roller assembly 300 includes a plurality of finishing roller pressing units 31 arranged side by side; after the roll pin located at the first station 001 completes the synchronous winding of the plurality of battery cells and is transposed to the second station 002, the plurality of film pressing units 21 are synchronously driven to move the corresponding upper and lower pressing rollers 211 and 212 to press the diaphragm corresponding to the battery cell, and the diaphragm cutter 22 cuts the diaphragm of the plurality of battery cells from the corresponding cutting position at one time; after the plurality of battery cells are transposed to the second station 002 following the corresponding roll pin, the plurality of finishing roller pressing units 31 move towards the corresponding battery cell to press the diaphragm for finishing winding, thereby solving the problem of low overall processing efficiency of the winding machine using the single diaphragm cutting and finishing method in the related art, realizing the cutting of multiple diaphragms at one time and the finishing of multiple battery cells, and improving the overall efficiency of the lithium battery winding machine.

[0040] In order to realize the cutting of the diaphragm of the plurality of battery cells from the corresponding cutting position at one time, with reference to Figures 1 to 6In one of the embodiments, the diaphragm cutting assembly 200 further comprises a first guide 23 arranged on the upper bottom plate 11 of the mounting frame 100, the first guide 23 is provided with a sliding seat 25 in transmission connection with a first driving unit 24, the first driving unit 24 is capable of driving the sliding seat 25 to slide along the first guide 23, a load plate 26 capable of being adjusted in motion is arranged on the vertical side wall 251 of the sliding seat 25, the front end of the load plate 26 away from the vertical side wall 251 is provided with a telescopic mounting seat 27, a plurality of upper pressing rollers 211 of the diaphragm pressing units 21 are arranged on the fixed seat 271 of the telescopic mounting seat 27, a diaphragm cutter 22 is arranged on the movable seat 272 of the telescopic mounting seat 27, and lower pressing rollers 212 of the plurality of diaphragm pressing units 21 are arranged on the front end of the sliding seat 25 away from the vertical side wall 251. The first driving unit 24 is used to drive the sliding seat 25 to move along the first guide 23 with the plurality of diaphragm pressing units 21 and the diaphragm cutter 22, so that the upper pressing roller 211 and the lower pressing roller 212 of each diaphragm pressing unit 21 press the diaphragm of the corresponding battery cell, and the diaphragm cutter 22 cuts the diaphragm of the plurality of battery cells from the corresponding cutting position at one time.

[0041] In some optional embodiments, the first guide 23 that meets the sliding of the sliding seat 25 is suitable for the first guide 23 of the embodiments of the present application, for example, the first guide 23 is a linear guide rail, the first driving unit 24 that meets the sliding of the sliding seat 25 is suitable for the first driving unit of the embodiments of the present application, for example, the first driving unit 24 can be a ball screw sliding table, a linear motor, or a driving cylinder, and in the present embodiment, the ball screw sliding table is preferred.

[0042] It can be understood that in this way, the first driving unit 24 is used to drive the sliding seat 25 to move along the first guide 23 with the plurality of diaphragm pressing units 21 and the diaphragm cutter 22, so that each diaphragm pressing unit 21 can press the diaphragm of the corresponding battery cell and the diaphragm cutter 22 contacts the diaphragm of the plurality of battery cells, and then the diaphragm cutter 22 cuts the diaphragm of the plurality of battery cells from the corresponding cutting position at one time, thereby realizing the one-time cutting of the diaphragm of the plurality of battery cells and improving the processing efficiency of the winding machine.

[0043] In order to realize the secondary displacement of the diaphragm cutter 22 for cutting, with reference to Figures 1 to 6In one of the embodiments, the carrier plate 26 is further provided with a bearing seat 28 near the fixed seat 271, and a transverse shaft 273 is installed in the bearing seat 28 and penetrates through the fixed seat 271 and is connected with the movable seat 272, and the movable seat 272 is further connected with a driving cylinder 29 provided on the carrier plate 26, wherein, after the plurality of film pressing units 21 and the diaphragm cutter 22 are moved to the preset position following the sliding seat 25, the driving cylinder 29 is used to drive the movable seat 272 to slide along the axial direction of the transverse shaft 273, so as to drive the diaphragm cutter 22 to make secondary feeding and cut the diaphragm of the plurality of battery cells from the corresponding cutting position at one time.

[0044] In order to realize the installation of the corresponding pressing roller, with reference to Figures 1 to 6 In one of the embodiments, the fixed seat 271 is further provided with a first optical axis 201, the first optical axis 201 penetrates through the fixed seat 271 and is connected with a corresponding first pressing roller seat 202 after penetrating out, and each first pressing roller seat 202 is provided with an upper pressing roller 211; the sliding seat 25 is further provided with a second optical axis 203, the second optical axis 203 penetrates through the sliding seat 25 and is connected with a corresponding second pressing roller seat 204 after penetrating out, and each second pressing roller seat 204 is provided with a lower pressing roller 212, and each second optical axis 203 is further provided with a compression spring 205, and two free ends of each compression spring 205 respectively abut against the second pressing roller seat 204 and the sliding seat 25, and the compression spring 205 is used to buffer the second pressing roller seat 204, so as to gently press the corresponding lower pressing roller 212 against the diaphragm of the corresponding battery cell.

[0045] In order to realize the movement of the tailing roller pressing unit 31 towards the second working position 002, so as to perform the diaphragm tailing winding on the battery cell, with reference to Figures 1 to 6 In one of the embodiments, the diaphragm tailing pressing roller assembly 300 further comprises a second guide 32 provided on the lower bottom plate 12 of the mounting frame 100, and the second guide 32 is provided with a sliding plate 34 connected with a second driving unit 33, the second driving unit 33 is capable of driving the sliding plate 34 to slide along the second guide 32, and the sliding plate 34 is provided with a plurality of moving frames 36 installed through shaft seats 35, and the moving frames 36 are further connected with a third driving unit 37 for driving the moving frames 36 to move, and the tailing roller pressing unit 31 is provided on the corresponding moving frame 36 away from the front end connected with the third driving unit 37, wherein,

[0046] The third driving unit 37 is used to drive the corresponding moving frame 36 to move the corresponding tailing roller pressing unit 31 to make secondary displacement for approaching the corresponding battery cell after the second driving unit 33 drives the sliding plate 34 to make primary displacement along the second guide 32, so as to press the corresponding battery cell to perform diaphragm tailing winding.

[0047] In some optional embodiments, the second guide 32 that meets the requirement of guiding the sliding of the sliding plate 34 is suitable for the second guide 32 of the embodiment of the application, for example, the second guide 32 is a linear guide rail, the second driving unit 33 that meets the requirement of driving the sliding plate 34 to slide along the second guide 32 is suitable for the second driving unit 33 of the embodiment of the application, for example, the second driving unit 33 is a driving cylinder, preferably a long-shaft cylinder, and the third driving unit 37 that meets the requirement of driving the moving frame 36 to move forward and backward relative to the shaft base 35 is also suitable for the third driving unit 33 of the embodiment of the application, for example, the third driving unit 33 includes but is not limited to a driving cylinder.

[0048] It can be understood that, in this way, the plurality of tailing roller pressing units 31 are driven by the second driving unit 33 to perform a first extension action, thereby completing a first displacement, and then the corresponding tailing roller pressing unit 31 is driven by the third driving unit 33 to perform a second displacement, so that the corresponding tailing roller pressing unit 31 presses the battery cell at the corresponding position of the second station 002, thereby completing the tailing action of the corresponding battery cell, and thus the tailing of a plurality of battery cells is performed at one time, and the operation efficiency of the winding machine is improved.

[0049] In one embodiment, referring to Figures 1 to 6 , each tailing roller pressing unit 31 includes a tailing pressing roller 311, a separator tailing guide roller 312, a pressing roller mounting seat 313, and a guide roller mounting seat 314, and each moving frame 36 is provided with two pressing roller mounting seats 313 spaced apart in the longitudinal direction at the front end connected to the corresponding third driving unit 37, the axial ends of the tailing pressing roller 311 are respectively connected to the two pressing roller mounting seats 313, and each pressing roller mounting seat 313 is provided with a guide roller mounting seat 314, and the separator tailing guide roller 312 is arranged above the corresponding tailing pressing roller 311, and the axial ends of the separator tailing guide roller 312 are respectively connected to the corresponding guide roller mounting seat 314.

[0050] In this embodiment, the tailing pressing roller 311 presses the corresponding battery cell, facilitating the subsequent tailing of the separator of the corresponding battery cell, and realizing the tailing of a plurality of separators at one time; the separator tailing guide roller 312 is used for guiding the tailing of the separator to prevent the corresponding battery cell from being wrinkled during the tailing of the separator.

[0051] Referring to Figures 1 to 6 , the working process of the separator cutting and tailing mechanism for a plurality of battery cells of the embodiment of the application is described as follows:

[0052] The membrane cutting and tailing mechanism for multiple battery cells in the embodiment of the application is provided with two membrane pressing units 21, and is defined as an inner membrane pressing unit and an outer membrane pressing unit respectively. Meanwhile, the membrane tailing roller assembly 300 is provided with two tailing roller pressing units 31. During the membrane cutting and tailing operation, the needle completes the winding action of the battery cell in the first station 001 and is changed to the second station 002. First, the membrane cutting assembly 200 is driven by the first driving unit 24 to move forward. Then, the membrane of the inner battery cell is pressed by the upper and lower pressing rollers of the inner membrane pressing unit, and the membrane of the outer battery cell is pressed by the upper and lower pressing rollers of the outer membrane pressing unit. Then, the membrane cutter 22 is driven by the driving cylinder 29 to extend to complete the action of cutting the inner and outer membranes. When the first station 001 completes the pre-winding of the membrane, the membrane cutting assembly 200 is driven to retreat to the initial position. At the same time, the second driving unit 33 of the membrane tailing roller assembly 300 drives the slide plate 34 to drive the two tailing roller pressing units 31 to complete the first level movement. Then, the third driving unit 37 drives the corresponding tailing roller 311 and membrane tailing guide roller 312 to perform the second level movement, so that the tailing roller 311 and the membrane tailing guide roller 312 press the battery cell located at the corresponding position of the second station to complete the tailing action of the battery cell. When the second station 002 completes the tailing of the battery cell, the second driving unit 33 and the third driving unit 37 of the membrane tailing roller assembly 300 retreat by one level and two levels respectively to retreat to the initial position. The same action is repeated when the first station 001 completes the winding action of the battery cell and is changed to the second station 002.

[0053] The embodiment of the application also provides a lithium battery winding machine, which comprises the membrane cutting and tailing mechanism.

[0054] The technical features of the above embodiments can be combined in any way. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0055] Those skilled in the art should recognize that the above embodiments are only used to illustrate the application, and are not used as a limitation of the application. Any appropriate changes and variations to the above embodiments within the scope of the application are within the scope of the application.

Claims

1. A separator cutting and finishing mechanism for multi-cell, characterized in that, The device comprises a mounting frame (100), a diaphragm cutting assembly (200) and a diaphragm tail-end roller assembly (300). The diaphragm cutting assembly (200) is arranged on the upper part of the mounting frame (100), and the diaphragm tail-end roller assembly (300) is arranged on the lower part of the mounting frame (100) and below the diaphragm cutting assembly (200). The diaphragm cutting assembly (200) comprises a plurality of diaphragm pressing units (21) arranged side by side and a diaphragm cutter (22) arranged between the upper pressing roller (211) and the lower pressing roller (212) of the diaphragm pressing units (21). The diaphragm tail-end roller assembly (300) comprises a plurality of tail-end roller pressing units (31) arranged side by side. After the winding needle at the first station completes synchronous winding of a plurality of battery cells and changes position to the second station, the plurality of diaphragm pressing units (21) synchronously drive the corresponding upper pressing roller (211) and lower pressing roller (212) to move to press the diaphragm of the corresponding battery cell, and the diaphragm cutter (22) cuts off the diaphragm of the plurality of battery cells from the corresponding cutting position at one time. After the plurality of battery cells change position to the second station following the corresponding winding needle, the plurality of tail-end roller pressing units (31) move towards the corresponding battery cells to press the diaphragm of the corresponding battery cell for tail-end winding.

2. The separator slitting and finishing mechanism for multi-cell according to claim 1, characterized in that, The diaphragm cutting assembly (200) further comprises a first guide (23) arranged on the upper bottom plate (11) of the mounting frame (100). The first guide (23) is provided with a sliding seat (25) in transmission connection with a first driving unit (24). The first driving unit (24) can drive the sliding seat (25) to slide along the first guide (23). The vertical side wall (251) of the sliding seat (25) is provided with an adjustable carrier plate (26). The front end of the carrier plate (26) away from the vertical side wall (251) is provided with a telescopic mounting seat (27). The fixed seat (271) of the telescopic mounting seat (27) is installed with the upper pressing roller (211) of the plurality of diaphragm pressing units (21). The movable seat (272) of the telescopic mounting seat (27) is installed with the diaphragm cutter (22). The lower pressing roller (212) of the plurality of diaphragm pressing units (21) is arranged at the front end of the sliding seat (25) away from the vertical side wall (251). The first driving unit (24) is used for driving the sliding seat (25) to move along the first guide (23) with the plurality of diaphragm pressing units (21) and the diaphragm cutter (22), so that the upper pressing roller (211) and the lower pressing roller (212) of each diaphragm pressing unit (21) press the diaphragm of the corresponding battery cell, and the diaphragm cutter (22) cuts off the diaphragm of the plurality of battery cells from the corresponding cutting position at one time.

3. The separator slitting and finishing mechanism for multi-cell according to claim 2, characterized in that, The bearing seat (28) is arranged on the carrier plate (26) near the fixed seat (271), and a transverse shaft (273) penetrating the fixed seat (271) and extending out of the bearing seat (28) is arranged in the bearing seat (28) and movably connected with the movable seat (272), and the movable seat (272) is further connected with a driving cylinder (29) arranged on the carrier plate (26), wherein, after the plurality of film pressing units (21) and the diaphragm cutter (22) move to the preset position following the sliding seat (25), the driving cylinder (29) is used to drive the movable seat (272) to slide along the axial direction of the transverse shaft (273) to drive the diaphragm cutter (22) to perform secondary feeding and cut the diaphragm of the plurality of battery cells from the corresponding cutting position at one time.

4. The separator slitting and finishing mechanism for multi-cell according to claim 3, characterized in that, The fixed seat (271) is further provided with a first optical axis (201) penetrating the fixed seat (271) and connected with a corresponding first roller seat (202) after extending out, and each first roller seat (202) is provided with an upper roller (211); the sliding seat (25) is further movably provided with a second optical axis (203) penetrating the sliding seat (25) and connected with a corresponding second roller seat (204) after extending out, and each second roller seat (204) is provided with a lower roller (212), and each second optical axis (203) is further provided with a compression spring (205), and two free ends of each compression spring (205) abut against the second roller seat (204) and the sliding seat (25) respectively, and the compression spring (205) is used to buffer the second roller seat (204) to gently press the corresponding lower roller (212) against the diaphragm of the corresponding battery cell.

5. The separator slitting and finishing mechanism for multi-cell according to claim 4, characterized in that, The first guide (23) comprises a linear guide rail, and / or the first driving unit (24) comprises one of a ball screw sliding table, a linear motor and a driving cylinder.

6. The separator slitting and finishing mechanism for multi-cell according to claim 1, wherein, The membrane tailing and pressing roller assembly (300) further comprises a second guide (32) arranged on the lower bottom plate (12) of the mounting frame (100), the second guide (32) is provided with a sliding plate (34) in transmission connection with a second driving unit (33), the second driving unit (33) can drive the sliding plate (34) to slide along the second guide (32), a plurality of moving frames (36) are arranged on the sliding plate (34) and installed through shaft seats (35), the moving frame (36) is further in transmission connection with a third driving unit (37) for driving the moving frame (36) to move, and the tailing and pressing unit (31) is arranged on the corresponding moving frame (36) away from the front end connected with the third driving unit (37), wherein the third driving unit (37) is used for driving the corresponding moving frame (36) to move the corresponding tailing and pressing unit (31) to move close to the corresponding battery cell for a second displacement after the second driving unit (33) drives the sliding plate (34) to move along the second guide (32) for a first displacement, so as to press the corresponding battery cell for membrane tailing and winding.

7. The separator slitting and finishing mechanism for multi-cell according to claim 6, characterized in that, The second guide (32) comprises a linear guide rail, and / or the second driving unit (33) and the third driving unit (37) each comprise a driving cylinder.

8. The separator slitting and finishing mechanism for multi-cell according to claim 6, characterized in that, Each of the tailing and pressing units (31) comprises a tailing and pressing roller (311), a membrane tailing and guiding roller (312), a pressing roller mounting seat (313) and a guiding roller mounting seat (314), two pressing roller mounting seats (313) are arranged on each of the moving frames (36) away from the front end connected with the corresponding third driving unit (37) and are arranged in a longitudinal direction, the axial ends of the tailing and pressing roller (311) are respectively connected with the two pressing roller mounting seats (313), one guiding roller mounting seat (314) is arranged on each of the pressing roller mounting seats (313), the membrane tailing and guiding roller (312) is arranged above the corresponding tailing and pressing roller (311), and the axial ends of the membrane tailing and guiding roller (312) are respectively connected with the corresponding guiding roller mounting seat (314).

9. The separator slitting and finishing mechanism for multi-cell according to any one of claims 1 to 8, characterized in that, The membrane cutting assembly (200) comprises two pressing membrane units (21) arranged side by side, and the membrane tailing and pressing roller assembly (300) comprises two tailing and pressing units (31) arranged side by side.

10. A lithium battery winder comprising a separator slitting and tail ending mechanism, characterized in that, The membrane cutting and tailing mechanism comprises the membrane cutting and tailing mechanism for multiple battery cells according to any one of claims 1 to 9.

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