CN115566277A - Lamination device - Google Patents

Abstract

The invention relates to a lamination device, wherein after lamination of a battery core is completed, a diaphragm positioning mechanism fixes a diaphragm between an output end of a swing roller mechanism and a lamination table on a first adsorption surface. The cutting mechanism cuts off the diaphragm. The cut diaphragm is adsorbed by the first adsorption surface, and the part of the diaphragm, which extends out of the first adsorption surface, is blown to a gap between the pressing and holding piece and the lamination table by the blowing assembly. The pressing piece moves towards the lamination table along the first direction until the diaphragm in the gap is abutted against the side surface, and then the free section of the diaphragm can be positioned. And then, the swing roller mechanism and the lamination table relatively move along the first direction, and the diaphragm is clamped or released by matching with the partition assembly, so that the first layer of diaphragm can be laid on the bearing surface. Because the diaphragm all can be adsorbed fixedly by first adsorption plane before and after cutting off, and the free section can be pulled to the lamination platform under the drive of pressing the piece of holding, so need not to rectify after first layer diaphragm is laid. Therefore, the lamination device can improve the lamination efficiency.

Description

Lamination device

Technical Field

The invention relates to the technical field of lithium battery equipment, in particular to a lamination device.

Background

In the production process of the lithium battery core, positive plates and negative plates need to be alternately stacked, and the positive plates and the negative plates are separated by diaphragms. The Z-shaped lamination process is to sequentially place the cut pole pieces on a lamination table, and fold and cover one layer of diaphragm when one pole piece is placed, so that the diaphragm forms a Z shape. The diaphragms used in the Z-lamination process are continuous and need to be cut to blank cells after a cell is stacked. The diaphragm of cutting forms the wobbling free segment of one end earlier, and the diaphragm of free segment needs to pull again to the lamination bench and as the first layer diaphragm of next electric core.

After the battery core is discharged, the diaphragm of the free section is blown to the bearing surface of the lamination table in a back blowing mode generally at present. The movement process of the diaphragm caused by the air flow blowing has certain randomness, so that the diaphragm is easy to generate the phenomena of deviation, wrinkling, flanging and the like. Therefore, after the back blowing, operations such as deviation correction and the like need to be carried out on the diaphragm, and the deviation correction needs a long time, so that the lamination efficiency is low.

Disclosure of Invention

In view of the above, there is a need to provide a lamination device with lamination efficiency.

A lamination assembly, comprising:

the lamination mechanism comprises a lamination table, wherein the lamination table is provided with a bearing surface and a side surface;

the roll swinging mechanism comprises a partition component, a diaphragm can pass around the roll swinging mechanism and is output by an output end of the roll swinging mechanism, the roll swinging mechanism and the lamination table can relatively reciprocate along a first direction so as to enable the diaphragm to be laid on the bearing surface in a Z shape, and the partition component can clamp or release the diaphragm;

the membrane positioning mechanism comprises a pressing piece and an air blowing assembly, the pressing piece is arranged on one side of the lamination table along the first direction and can move along the first direction, and the pressing piece comprises a first adsorption surface parallel to the bearing surface; and

a cutting mechanism for cutting the diaphragm;

after lamination is completed, the swing roller mechanism is positioned on one side, back to the lamination table, of the pressing and holding piece, and the diaphragm positioning mechanism can fix a diaphragm between the output end of the swing roller mechanism and the lamination table on the first adsorption surface; the cutting mechanism can cut off the diaphragm between the pressing piece and the lamination table; after the diaphragm is cut off, the blowing assembly can blow the part of the diaphragm, which extends out of the first adsorption surface, to a gap between the pressing piece and the lamination table, and the pressing piece moves towards the lamination table along the first direction until the diaphragm in the gap is abutted against the side surface.

In one embodiment, the pressure holding member further includes a second suction surface facing the side surface to suction the diaphragm blown into the gap by the air-blowing assembly.

In one embodiment, the lamination mechanism further comprises a support body and a first lifting assembly, the lamination table and the pressing member are mounted on the support body, and the lamination table can move along a second direction perpendicular to the bearing surface under the driving of the first lifting assembly.

In one embodiment, the lamination mechanism further includes a second lifting assembly, and the support body is disposed at a moving end of the second lifting assembly and can move along the second direction under the driving of the second lifting assembly.

In one embodiment, the diaphragm positioning mechanism further comprises a steering roller, the steering roller is arranged on one side of the pressing and holding piece, which is opposite to the lamination table, and the diaphragm positioned between the output end of the swing roller mechanism and the pressing and holding piece can wind around the steering roller;

the second direction is a vertical direction, and the supporting main body is driven by the second lifting assembly to lift the height, so that a diaphragm positioned between the output end of the swing roller mechanism and the lamination table is attached to the first adsorption surface, and the diaphragm is adsorbed and fixed by the first adsorption surface.

In one embodiment, the bearing surface is provided with a vacuum absorption hole, and the bearing surface can perform vacuum absorption on the membrane laid on the bearing surface through the vacuum absorption hole.

In one embodiment, the lamination mechanism further comprises a pressing assembly, the pressing assembly comprises a pressing state and an avoiding state, when the pressing assembly is in the pressing state, the pole piece and the diaphragm can be pressed on the bearing surface, and when the pressing assembly is in the avoiding state, the avoiding state can be formed on the bearing surface.

In one embodiment, the cutting mechanism comprises a cutter, an insulating protective layer is arranged on one side of the cutter, and when the cutting mechanism enters a cutting station capable of cutting off a diaphragm between the pressing piece and the laminating table, the insulating protective layer is located on one side, facing the laminating table, of the cutter.

In one embodiment, the blowing assembly is mounted on the cutting mechanism, and after the cutting mechanism cuts the membrane between the pressing piece and the lamination table, the blowing assembly can blow the part of the membrane, which extends out of the first adsorption surface, to the gap between the pressing piece and the lamination table.

In one embodiment, the battery pack further comprises a coil inserting clamping jaw fixedly connected with the cutting mechanism, and the coil inserting clamping jaw is used for clamping the battery core on the bearing surface;

the coil inserting clamping jaw can move along with the cutting mechanism to drive the clamped battery core to be far away from the bearing surface.

According to the lamination device, after lamination of the battery core is completed, the diaphragm positioning mechanism fixes the diaphragm between the output end of the swing roller mechanism and the lamination table on the first adsorption surface, the partition assembly clamps the diaphragm tightly, and the cutting mechanism cuts off the diaphragm between the pressing piece and the lamination table. The cut diaphragm is adsorbed by the first adsorption surface, and the part of the diaphragm, which extends out of the first adsorption surface, is blown to a gap between the pressing and holding piece and the lamination table by the blowing assembly. The pressing piece moves towards the lamination table along the first direction until the diaphragm in the gap is abutted against the side surface, and then the free section of the diaphragm can be positioned. And then, the swing roller mechanism and the lamination table relatively move along the first direction, and the diaphragm is clamped or released by matching with the partition assembly, so that the first layer of diaphragm can be laid on the bearing surface. Because the diaphragm all can adsorb fixedly by first adsorption plane before and after cutting off, and the diaphragm cuts off the free section that forms and can be drawn to the lamination platform under the drive of holding the piece of pressure, so need not to rectify after the first layer diaphragm is laid. Therefore, the lamination device can improve the lamination efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of a lamination assembly in accordance with an embodiment of the present invention;

FIG. 2 is a front view of a lamination mechanism in the lamination device of FIG. 1;

FIG. 3 is a left side view of the lamination mechanism shown in FIG. 2;

FIG. 4 is a top view of the lamination mechanism shown in FIG. 2;

FIG. 5 is a schematic view of a portion of the laminating apparatus shown in FIG. 1 including a cutting mechanism;

fig. 6-16 are simplified schematic views of the lamination device of fig. 1 showing a change in condition during lamination.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, a lamination apparatus 10 according to an embodiment of the present invention includes a lamination mechanism 100, a swing roller mechanism 200, a diaphragm positioning mechanism 300, and a cutting mechanism 400.

The lamination mechanism 100 can realize the stacking of the pole pieces and the diaphragms, so that the battery core is obtained. Specifically, the pole pieces include positive pole pieces and negative pole pieces, the positive pole pieces and the negative pole pieces can be alternately stacked on the lamination mechanism 100, and the diaphragm is disposed between the adjacent positive pole pieces and the adjacent negative pole pieces to separate the adjacent positive pole pieces from the adjacent negative pole pieces.

In addition, in order to smoothly obtain the pole pieces required by lamination and to blank the stacked battery cells from the lamination mechanism 100, the lamination device 10 in this embodiment further includes a taking mechanism (not shown) and a lower line clamping jaw 500.

Referring to fig. 2 and 3, the lamination mechanism 100 includes a lamination station 110. The lamination stage 110 may have a plate-like structure, generally rectangular, formed of a material having high mechanical strength, such as metal. The lamination stage 110 has a bearing surface 111 and a side surface 112, and the side surface 112 is disposed on a side surface of the lamination stage 110. When the lamination machine is used specifically, the bearing surface 111 of the lamination table 110 faces upward and is used for bearing the pole pieces and the diaphragms, and the pole pieces can be obtained by the piece taking mechanism and are sequentially placed on the bearing surface 111. The angle between the carrying surface 111 and the side surface 112 is generally 90 degrees, so that the side surface 112 faces to the left or right when the carrying surface 111 faces upward.

Referring to fig. 4, in the present embodiment, the carrying surface 111 is provided with a vacuum absorption hole 101, and the carrying surface 111 can absorb the diaphragm laid on the carrying surface 111 through the vacuum absorption hole 101.

Specifically, the vacuum suction holes 101 may be uniformly distributed on the supporting surface 111, or may be distributed only at a specific position, such as a side edge, of the supporting surface 111. The vacuum suction holes 101 can communicate with each other through a vacuum generator, so that a negative pressure can be formed on the contact surface between the support surface 111 and the diaphragm. During lamination, a first layer of membrane, i.e. the first layer of membrane, is laid on the bearing surface 111. Vacuum adsorption hole 101 can make first layer diaphragm adsorb in loading face 111 reliably to prevent that first layer diaphragm from taking place the displacement at the lamination in-process, help promoting the quality of electric core.

In the embodiment, the lamination mechanism 100 further includes a support body 120 and a first lifting assembly 130, the first lifting assembly 130 and the lamination table 110 are both mounted on the support body 120, and the lamination table 110 can move along a second direction perpendicular to the bearing surface 111 under the driving of the first lifting assembly 130. Specifically, the second direction refers to the up-down direction shown in fig. 1. The first lifting assembly 130 may be a cylinder, an electric cylinder, or a motor and a screw pair. It can be seen that the first lifting assembly 130 can adjust the height of the lamination table 110 as required during the lamination process, thereby ensuring that the lamination process is smoothly performed.

Specifically, each time a pole piece is placed on the bearing surface 111 by the sheet taking mechanism, the first lifting assembly 130 drives the lamination table 110 to descend by a height equal to the thickness of the pole piece, so as to ensure that the upper surface of the battery cell is always maintained at the preset height.

Further, in the embodiment, the lamination mechanism 100 further includes a second lifting assembly 140, and the support body 120 is disposed at a moving end of the second lifting assembly 140 and can move in the second direction under the driving of the second lifting assembly 140. The second lifting assembly 140 may have the same structure as the first lifting assembly 130, and the second lifting assembly 140 can integrally adjust the height of the lamination mechanism 100, so that the lamination mechanism 100 can be applied to more application scenarios.

In addition, in the present embodiment, the lamination mechanism 100 further includes a pressing assembly 150, and the pressing assembly 150 includes a pressing state and a clearance state. When the pressing assembly 150 is in a pressing state, the pole pieces and the diaphragms can be pressed on the bearing surface 111, so that the stacked pole pieces and diaphragms 11 are prevented from loosening or shifting; when the pressing assembly 150 is in the avoiding state, the avoiding position can be formed on the bearing surface 111, so that the pole pieces and the diaphragms can be conveniently and smoothly stacked on the bearing surface 111.

Specifically, the pressing assembly 150 includes a pressing blade 151 disposed at an edge of the lamination table 110 and a pressing driving member 152, and the pressing driving member 152 can drive the pressing blade 151 to move along a direction parallel to the bearing surface and a direction perpendicular to the bearing surface, so that the pressing assembly 150 is switched between a pressing state and an avoiding state. The pressing drive 152 may be an electric cylinder or an air cylinder, and for a rectangular lamination table 110, the pressing blades 151 are preferably distributed at four corners of the lamination table 110.

Referring to fig. 1 again, in practical use, the swing roller mechanism 200 is located above the lamination table 110, and the continuously unreeled diaphragm 11 can be wound around the swing roller mechanism 200 and output from an output end of the swing roller mechanism 200. Specifically, the output end of the swing roller mechanism 200 is provided with a main driving swing roller 220, the diaphragm 11 output by the swing roller mechanism 200 can pass through the main driving swing roller 220, and the main driving swing roller 220 can drive the diaphragm 11 to swing in the first direction. The first direction is perpendicular to the second direction, specifically, the left and right direction shown in fig. 1.

The rolled diaphragm 11 may be pre-wound around the tension shaft and continuously unwound by the tension shaft axial swing roller mechanism 200 during the lamination process. In addition, the diaphragm 11 can also be output from the previous process and directly enter the swing roller mechanism 200. The diaphragm 11 output by the swing roller mechanism 200 can be laid on the bearing surface 111, so that two adjacent pole pieces placed on the bearing surface 111 by the piece taking mechanism are separated. Specifically, the oscillating roller mechanism 200 and the lamination table 110 can relatively reciprocate along the first direction, and the sheet taking mechanism is matched to sequentially place the pole pieces on the surface of the diaphragm 11, so that the diaphragm 11 output by the oscillating roller mechanism 200 is Z-shaped laid on the bearing surface 111, and the stacking of the battery cells is completed.

Further, the swing roller mechanism 200 includes a partition assembly 210, and the partition assembly 210 can clamp or release the diaphragm. The partition assembly 210 is generally disposed upstream of the output end of the oscillating roller mechanism 200, and during lamination, the partition assembly 210 releases the membrane; after lamination is complete, the partition assembly 210 may be switched between a state of clamping the diaphragm or releasing the diaphragm depending on the actual operating conditions. Specifically, in the present embodiment, the partition assembly 210 includes a rotating roller 211, a partition driving member 212, and a pressing member 213 disposed at a driving end of the partition driving member 212. The diaphragm 11 can pass between the pressing member 213 and the rotating roller 211, and the partition driving member 212 can drive the pressing member 213 to approach or separate from the rotating roller 211, thereby clamping or releasing the diaphragm 11.

Specifically, in the present embodiment, the lamination stage 110 is kept stationary and is moved back and forth in the first direction by the oscillating roller mechanism 200. Obviously, in other embodiments, the oscillating roller mechanism 200 may be kept still and the lamination table 110 may move back and forth along the first direction.

Before lamination, the oscillating roller mechanism 200 first lays a first layer of membrane, i.e. a first layer of membrane, on the bearing surface 111 and stays on one side of the lamination table 110 in the first direction (see fig. 16), which position can be defined as a lamination start station. In the lamination process, the partition assembly 210 releases the diaphragms 11, the positive plates and the negative plates are alternately placed on the lamination table 110 by the plate taking mechanism, and when one pole piece is placed, the swing roller mechanism 200 acts once along the first direction and pulls the diaphragms 11 to cover the pole pieces, so that the pole pieces are arranged between the adjacent diaphragms 11; the above operations are repeated until the number of stacked pole pieces reaches the required number of layers, so that the preparation of one battery cell can be completed, and the diaphragm 11 laid on the lamination table 110 is folded into a Z shape.

After lamination is completed, the oscillating roller mechanism 200 stays on the side of the lamination table 110 facing away from the lamination start station in the first direction (see fig. 6), specifically, the right side in fig. 1 in this embodiment. At this time, the position of the oscillating roller mechanism 200 may be defined as a lamination end station.

Referring again to FIG. 1, the diaphragm positioning mechanism 300 includes a pressing member 310 and a blowing assembly 320. The pressing member 310 is disposed on one side of the lamination table 110 along the first direction and can move along the first direction. Specifically, the pressing member 310 may be mounted to the support body 120 through a structure in which a guide rail is engaged with a slider. The pressing member 310 is located on the side of the lamination table 110 facing the lamination finishing station, i.e., the right side as viewed in fig. 1. Also, a hold down 310 is located between the lamination station 110 and the lamination end station. The pressing member 310 may be an elongated plate-like structure, and the extending direction thereof coincides with the extending direction of the side surface 112 of the lamination stage 110.

The blow down assembly 320 is capable of blowing out a stream of air. Specifically, the insufflation assembly 320 generally includes a tube and a nozzle, the tube communicating the nozzle with a gas source so that the insufflation assembly 320 can insufflate through the nozzle.

Referring again to fig. 2, the pressing member 310 includes a first absorption surface 311. Also, the first suction surface 311 is parallel to the carrying surface 111, and the first suction surface 311 can suck the separator 11. Specifically, a first suction hole (not shown) is formed in the surface of the first suction surface 311, and the first suction hole can be communicated with a vacuum generating device through a pipeline, so that negative pressure is formed on the first suction surface 311.

Taking fig. 2 as an example, the first absorption surface 311 is an upper surface of the pressing member 310. It should be noted that the first suction surface 311 is parallel to the carrying surface 111, which means that the first suction surface 311 and the carrying surface 111 are substantially aligned and may not be strictly parallel.

After lamination is completed, the oscillating roller mechanism 200 stays at the lamination end station. At this time, the swing roller mechanism 200 is located on the side of the holding member 310 facing away from the lamination stage 110. That is, the pressure holding member 310 is located between the swing roller mechanism 200 and the lamination table 110, so that the diaphragm 11 between the output end of the swing roller mechanism 200 and the lamination table 110 is passed through the pressure holding member 310, and the first suction surface 311 faces the passed diaphragm 11.

Next, the diaphragm positioning mechanism 300 fixes the diaphragm 11 between the output end of the swing roller mechanism 200 and the lamination table 110 to the first suction surface 311. Specifically, the vacuum generating device may be activated to form a negative pressure on the first adsorption surface 311, so as to realize adsorption fixation of the diaphragm 11. Alternatively, a holding member (not shown) may be used to press the diaphragm 11 against the first suction surface 311 in a direction perpendicular to the first suction surface 311 to fix the diaphragm.

The cutting mechanism 400 is located outside the cutting station during lamination so as to avoid interference with the lamination process, and after lamination is completed, the cutting mechanism 400 enters the cutting station to prepare the membrane 11 between the pressing member 310 and the lamination table 110 for cutting. Specifically, the cutting station is located between the lamination table 111 and the holding member 310. The cutting mechanism 400 includes a cutting knife 410, and after the cutting mechanism 400 enters a cutting station, the diaphragm 11 fixed between the pressing member 310 and the lamination table 110 can be cut off by driving the cutting knife 410 to move up and down.

In the present embodiment, the cutting blade 410 is a hot cutting blade. The cutter 410 is energized to generate heat, and the diaphragm 11 in contact therewith can be cut off. Further, an insulating protective layer 420 is provided on one side of the cutting blade 410, and when the cutting mechanism 400 enters the cutting station, the insulating protective layer 420 is located on the side of the cutting blade 410 facing the lamination stage 110, i.e., on the left side as viewed in fig. 1. The insulating protection layer 420 may be made of epoxy resin, and may have buffering and insulating functions. The insulating protection layer 420 can prevent the cutter 410 from colliding with the lamination table 110 in the cutting or debugging process, prevent metal from colliding with metal in the electrified state, improve safety, and protect the cutter 410 and the lamination table 110.

After the cutting mechanism 400 cuts the separator 11 between the pressing member 310 and the lamination table 110, the stacked battery cell is disconnected from the separator 11, and the separator 11 will form a free section. The free section formed by cutting the diaphragm 11 will protrude from the first suction surface 311 toward the lamination stage 110 side, i.e., the left side in fig. 1. Since the diaphragm positioning mechanism 300 fixes the diaphragm 11 before the cutting mechanism 400 performs the cutting operation, the free section formed after the diaphragm 11 is cut can be prevented from being electrostatically attracted to the output end of the swing roller mechanism 200. Further, the diaphragm 11 can be continuously sucked and fixed by the first suction surface 311 after being cut, and random movement of the free segment of the diaphragm 11 can be prevented.

Further, the air blowing assembly 320 can blow the portion of the diaphragm 11 protruding from the first suction surface 311 to the gap between the holder 310 and the lamination table 110. Specifically, the part of the diaphragm 11 extending out of the first absorption surface 311 is a free section formed after cutting. In the initial state, the pressing member 310 and the lamination stage 110 are spaced apart from each other in the first direction, so that a gap is formed therebetween. After the membrane 11 is cut, the blowing assembly 320 blows out the air flow and forces the free section of the membrane 11 to bend. Generally, the blow assembly 320 forces the free section of the diaphragm 11 to bend 90 degrees, thereby allowing the diaphragm 11 to conform to the sides of the holddown 310.

After the free section of the diaphragm 11 is blown to the gap between the pressing member 310 and the lamination table 110, the pressing member 310 moves toward the lamination table 110 in the first direction until it abuts against the lamination table 110, so that the free section of the diaphragm 11 is clamped between the pressing member 310 and the side surface 112. In this manner, the free section of the diaphragm 11 can be positioned on the lamination stage 110. After the free section of the membrane 11 is fixed, the swing roller mechanism 200 moves in the first direction relative to the lamination table 110, and cooperates with the partition assembly 210 to clamp or release the membrane, so as to lay the first layer of membrane on the bearing surface 111. At this time, the oscillating roller mechanism 200 returns to the lamination start position, so that the oscillating roller mechanism cooperates with the sheet taking mechanism to perform lamination of the next cell.

Since the diaphragm 11 can be adsorbed and fixed by the first adsorption surface 311 before and after being cut by the cutting mechanism 400, and the free section of the diaphragm 11 can be pulled to the lamination table 110 under the driving of the pressing member 310, the free section of the diaphragm 11 is prevented from moving randomly in the process of being pulled to the lamination table 110, and therefore deviation rectification is not needed after the first layer of the diaphragm is laid. Therefore, the length of time required for the interval of the lamination operation for two cells can be significantly shortened, thereby improving the lamination efficiency.

In the present embodiment, the pressing member 310 further includes a second suction surface 312 facing the side surface 112, and the second suction surface 312 is capable of sucking the diaphragm 11 blown into the gap by the air blowing member 320. The angle between the second suction surface 312 and the first suction surface 311 is also substantially 90 degrees. Similarly, the second suction surface 312 may be provided with a second suction hole (not shown) which may be communicated with the vacuum generator through a pipeline, so as to form a negative pressure on the second suction surface 312. Therefore, when the air blowing assembly 320 blows the free section of the diaphragm 11 to the gap, the second suction surface 312 can suction-fix the diaphragm 11, thereby achieving more stable positioning of the free section.

In this embodiment, the diaphragm positioning mechanism 300 further includes a turning roller 330, the turning roller 330 is disposed on a side of the pressing member 310 opposite to the lamination table 110, and the diaphragm 11 located between the output end of the oscillating roller mechanism 200 and the pressing member 310 can pass around the turning roller 330. The steering roller 330 can support the diaphragm 11 and adjust the orientation, and when the relative position between the swing roller mechanism 200 and the pressing member 310 changes, the steering roller 330 can prevent the edge of the diaphragm 11 and the pressing member 310 from being worn.

Specifically, the support body 120 can be lifted up by the second lifting assembly 140 such that the diaphragm 11 positioned between the output end of the swing roller mechanism 200 and the lamination table 110 is attached to the first suction surface 311, so that the first suction surface 311 suctionally fixes the diaphragm 11. At this time, the deflection roller 330 can support the diaphragm 11.

Referring to fig. 5, in the present embodiment, the blowing assembly 320 is installed on the cutting mechanism 400, and after the cutting mechanism 430 cuts the diaphragm 11 between the pressing member 310 and the lamination table 110, the blowing assembly 320 can blow the portion of the diaphragm 11 protruding from the first absorption surface 311 to the gap between the pressing member 310 and the lamination table 110.

Specifically, the relative positions of the air blowing assembly 320 and the cutting mechanism 400 are calibrated in advance, so that when the cutting mechanism 400 moves to the cutting station, the air blowing assembly 320 just moves to the air blowing station. The blowing assembly 320 located at the blowing station can correspond to a portion of the diaphragm 11 protruding from the first adsorption surface 311. Thus, the free section of the diaphragm 11 can be blown without independently adjusting the position of the blowing assembly 320 after lamination is completed, so that time can be effectively saved.

Referring to fig. 1 again, in the present embodiment, the lamination device winding inserter clamping jaw 500 is fixedly connected to the cutting mechanism 400, and the winding inserter clamping jaw 500 is used for clamping the battery cells on the carrying surface 111. Moreover, the offline clamping jaw 500 can move along with the cutting mechanism 400 to drive the clamped battery cell to be far away from the bearing surface 111.

Specifically, when the cutting mechanism 400 enters the cutting station, the offline clamping jaw 500 can move to the vicinity of the lamination table 110 along with the cutting mechanism 400 and clamp the battery cells on the bearing surface 111; and when the cutting mechanism 400 exits the cutting station, the offline clamping jaw 500 can drive the clamped battery core to be far away from the carrying surface 111 until the clamped battery core is moved to the blanking position.

It can be seen that the offline clamping jaw 500 is linked with the cutting mechanism 400, and can complete clamping of the battery cell on the bearing surface 111 by using the time when the cutting mechanism 400 cuts the membrane 11. After the cutting mechanism 400 finishes cutting and exits from the cutting station, the battery cell is separated from the diaphragm 11, and the offline clamping jaw 500 drives the battery cell to be away from the lamination table 110 along with the cutting mechanism 400. Therefore, the offline operation flow of the battery cell can be simplified, and the production efficiency is improved.

It will be appreciated that in other embodiments the lower line jaw 500 and cutting mechanism 400 can be separately driven and independently moved by separate drive members.

The operation of the lamination device 10 described above will be briefly described with reference to fig. 6 to 16 of the drawings accompanying the description:

after the lamination of the first cell 12 is completed, the lamination device 10 is in the state shown in fig. 6. At this time, the battery cell 12 is pressed and held on the lamination table 110 by the pressing knife 151, the swing roller mechanism 200 is located at the lamination finishing station, the first adsorption surface 311 faces upward and is approximately flush with the upper surface of the battery cell 12, and the diaphragm 11 between the output end of the swing roller mechanism 200 and the lamination table 110 is adsorbed and fixed by the first adsorption surface 311.

The roll swinging mechanism 200 is controlled to be away from the pressing member 310 along the first direction, and the second lifting assembly 140 drives the lamination table 110 and the pressing member 310 to be lifted along the second direction synchronously, so as to pull the distance between the lamination table 110 and the pressing member 310 and the roll swinging mechanism 200, thereby preventing the roll swinging mechanism 200 from interfering during the process of cutting the membrane 11 by the cutting mechanism 400 and clamping the electrical core 12 by the lower wire clamping jaw 500. At this time, the lamination device 10 is in the state shown in fig. 7.

Obviously, if the oscillating roller mechanism 200 is located at the lamination ending station and the distance between the oscillating roller mechanism and the lamination table 110 and the pressing member 310 is large enough, the step can be omitted, and the cutting and inserting operations are directly performed by the cutting mechanism 400 and the inserting clamping jaw 500.

The partition driving member 212 drives the pressing member 213 to press against the rotating roller 211, thereby clamping the diaphragm 11. The cutting mechanism 400 enters a cutting station, the offline clamping jaw 500 moves to a position where the stacked battery cells 12 can be grabbed along with the cutting mechanism 400, and the blowing assembly 320 enters a blowing station. At this time, the lamination device 10 is in the state shown in fig. 8.

The cutting mechanism 400 is activated, the cutter 410 moves from the top to the bottom to cut the separator 11, and the inserting clamping jaw 500 grasps the battery cell 12 on the laminating table 110. The cut diaphragm 11 is still sucked and fixed by the pressing member 310, and the cut diaphragm 11 will form a free section protruding from the first suction surface 311. The blowing assembly 320 located at the blowing station blows gas to the free section of the diaphragm 11 so that the free section bends downward until being adsorbed by the second adsorption surface 312. At this time, the lamination device 10 is in the state shown in fig. 9.

The pressing knife 151 withdraws, and the pressing assembly 150 is switched to the avoiding state. Then, the cutting mechanism 400 is controlled to exit from the cutting station, the offline clamping jaw 500 moves the electrical core 12 out of the lamination table 110, and the blowing assembly 320 moves out of the blowing station along with the cutting mechanism 400. The diaphragm 11 is continuously sucked and fixed by the cooperation of the first suction surface 311 and the second suction surface 312. At this time, the lamination device 10 is in the state shown in fig. 10.

The first lifting assembly 130 drives the lamination table 110 to lift in the second direction until the carrying surface 111 is flush or substantially flush with the first suction surface 311. Next, the pressing member 310 is controlled to approach the lamination stage 110 in the first direction until the second suction surface 312 abuts against the side surface 112 to clamp the diaphragm 11 between the second suction surface 312 and the side surface 112, thereby positioning the free section of the diaphragm 11 on the lamination stage 110. During the process of the pressing member 310 approaching the lamination station 110, the swing roller mechanism 200 may move in the same direction to avoid pulling the diaphragm 11. At this time, the lamination device 10 is in the state shown in fig. 11.

The lamination table 110 and the pressing member 310 are driven by the second lifting assembly 140 to synchronously descend along the second direction until the lamination table 110 and the pressing member 310 are positioned below the main driving swing roller 220 of the swing roller mechanism 200. The partition driving member 212 drives the pressing member 213 to be separated from the rotating roller 211, thereby releasing the diaphragm 11, and the diaphragm 11 is straightened by the tension. At this time, the lamination device 10 is in the state shown in fig. 12. Next, the vacuum generator stops the evacuation of the first suction hole and the second suction hole, and the pressure holder 310 releases the suction of the diaphragm 11.

The oscillating roller mechanism 200 is moved in a first direction from the lamination end station to the lamination start station by a certain distance so as to lay a predetermined length of the separator 11 on the carrying surface 111. Specifically, the preset length is equal to the total length of the first layer of membrane minus the length of the membrane 11 located on the side of the lamination station 110. At this time, the lamination device 10 is in the state shown in fig. 13.

The membrane 11 is again clamped by the break assembly 210 and the holddown 310 is moved away from the lamination station 110 in the first direction. At this time, the lamination device 10 is in the state shown in fig. 14.

The severing assembly 210 maintains the clamping of the diaphragm 11 and the oscillating roller mechanism 200 continues to move in the first direction towards the lamination start station until the oscillating roller mechanism 200 reaches the lamination start station. In this process, the membrane 11 located on the side of the lamination station 110 is gradually dragged to the carrying surface 111, thereby completing the laying of the first layer of membrane. In order to improve the stability and accuracy of the diaphragm 11 during the moving process, the vacuum generating device may be further activated to make the bearing surface 111 form a negative pressure through the vacuum suction hole 101, so as to suck the diaphragm 11. At this time, the lamination device 10 is in the state shown in fig. 15.

The pressing assembly 150 is switched to the pressing state, and the pressing knife 151 presses the first layer of membrane on the bearing surface 111. Then, the partition driving member 212 drives the pressing member 213 to be separated from the rotating roller 211, thereby releasing the diaphragm 11. At this time, the lamination device 10 is in the state shown in fig. 16. The swing roller mechanism 200 moves to the lamination starting station, the first layer of diaphragm is also laid, the tension of the diaphragm 11 is restored to the tension required by lamination, and therefore the lamination of the next battery cell can be carried out by starting the sheet taking mechanism.

In the lamination device 10, after the lamination of the battery cell is completed, the diaphragm 11 between the output end of the swing roller mechanism 200 and the lamination table 110 is fixed on the first adsorption surface 311 by the diaphragm positioning mechanism 300, the diaphragm 11 is clamped by the partition assembly 210, and the diaphragm 11 between the pressing member 310 and the lamination table 110 is cut off by the cutting mechanism 400. The cut diaphragm 11 is sucked by the first suction surface 311, and the blow-off unit 320 blows off a portion of the diaphragm 11 protruding from the first suction surface 311 to a gap between the holder 310 and the lamination table 110. The pressing member 310 moves toward the lamination stage 110 along the first direction until the diaphragm 11 in the gap is pressed against the side surface 112, so that the free section of the diaphragm 11 can be positioned. Then, the swing roller mechanism 200 and the lamination table 110 move relatively along the first direction, and cooperate with the partition assembly 210 to clamp or release the membrane 11, so as to lay the first layer of membrane on the bearing surface 111. Because the diaphragm 11 can be adsorbed and fixed by the first adsorption surface 311 before and after being cut off, and the free section formed after the diaphragm 11 is cut off can be pulled to the lamination table 110 under the driving of the pressing and holding piece 310, deviation rectification is not needed after the first layer of diaphragm is laid. Therefore, the lamination device 10 can improve lamination efficiency.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A lamination assembly, comprising:

the lamination mechanism comprises a lamination table, wherein the lamination table is provided with a bearing surface and a side surface;

the roller swinging mechanism comprises a partition assembly, a diaphragm can pass through the roller swinging mechanism in a winding manner and is output by an output end of the roller swinging mechanism, the roller swinging mechanism and the lamination table can relatively reciprocate along a first direction so as to enable the diaphragm to be laid on the bearing surface in a Z shape, and the partition assembly can clamp or release the diaphragm;

the membrane positioning mechanism comprises a pressing and holding piece and an air blowing assembly, the pressing and holding piece is arranged on one side of the lamination table along the first direction and can move along the first direction, and the pressing and holding piece comprises a first adsorption surface parallel to the bearing surface; and

a cutting mechanism for cutting the diaphragm;

after lamination is completed, the swinging roller mechanism is positioned on one side, back to the lamination table, of the pressing and holding piece, and the diaphragm positioning mechanism can fix a diaphragm between the output end of the swinging roller mechanism and the lamination table on the first adsorption surface; the cutting mechanism can cut off the diaphragm between the pressing piece and the lamination table; after the diaphragm is cut off, the blowing assembly can blow the part of the diaphragm, which extends out of the first adsorption surface, to a gap between the pressing piece and the lamination table, and the pressing piece moves towards the lamination table along the first direction until the diaphragm in the gap is abutted against the side surface.

2. The lamination device according to claim 1, wherein the pressing member further includes a second suction surface facing the side surface to suck the diaphragm blown into the gap by the air-blowing assembly.

3. The lamination device according to claim 1, wherein the lamination mechanism further comprises a support body and a first lifting assembly, the lamination table and the pressing member are mounted on the support body, and the lamination table is capable of moving in a second direction perpendicular to the bearing surface under the driving of the first lifting assembly.

4. The lamination device according to claim 3, wherein the lamination mechanism further comprises a second lifting assembly, and the support body is disposed at a moving end of the second lifting assembly and is capable of moving in the second direction under the driving of the second lifting assembly.

5. The laminating device according to claim 4, wherein the diaphragm positioning mechanism further comprises a turning roller disposed on a side of the pressing member facing away from the laminating table, and the diaphragm positioned between the output end of the swinging roller mechanism and the pressing member can pass around the turning roller;

the second direction is a vertical direction, and the supporting main body is driven by the second lifting assembly to lift the height, so that the diaphragm positioned between the output end of the swing roller mechanism and the lamination table is attached to the first adsorption surface, and the first adsorption surface can adsorb and fix the diaphragm conveniently.

6. The laminating device according to claim 1, wherein the carrying surface is provided with vacuum suction holes, and the carrying surface can vacuum-suck the membrane laid on the carrying surface through the vacuum suction holes.

7. The lamination device according to claim 1, wherein the lamination mechanism further includes a pressing assembly, the pressing assembly includes a pressing state and a position-avoiding state, and when the pressing assembly is in the pressing state, the pressing assembly can press the pole piece and the diaphragm on the bearing surface, and when the pressing assembly is in the position-avoiding state, the pressing assembly can form a position-avoiding state on the bearing surface.

8. The laminating apparatus according to claim 1, wherein the cutting mechanism comprises a cutting knife, one side of the cutting knife is provided with an insulating protective layer, and the insulating protective layer is located on the side of the cutting knife facing the laminating table when the cutting mechanism enters a cutting station capable of cutting the membrane between the holding member and the laminating table.

9. The laminating device of claim 1, wherein the blow-off assembly is mounted to the cutting mechanism and is capable of blowing off a portion of the membrane protruding from the first suction surface to a gap between the press holder and the laminating table after the cutting mechanism cuts off the membrane between the press holder and the laminating table.

10. The laminating device of claim 1, further comprising a lower wire clamping jaw fixedly connected to the cutting mechanism, the lower wire clamping jaw being configured to clamp a battery cell on the carrying surface;

the coil inserting clamping jaw can move along with the cutting mechanism to drive the clamped battery core to be far away from the bearing surface.

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