CN110890582A - Lamination device and lamination method - Google Patents

Abstract

The application discloses a lamination device and a lamination method. The lamination device includes: a lamination platform; the membrane unwinding mechanism is used for conveying the membrane towards the lamination platform through the transition roller; the positioning assembly is used for respectively positioning a first pole piece and a second pole piece with different polarities on the upper surface and the lower surface of the diaphragm at the feeding station; the first clamping mechanism is used for clamping the positioned first pole piece and the second pole piece with the diaphragm between the first pole piece and the second pole piece; and the driving assembly is used for driving the first clamping mechanism to move to the lamination platform, so that the first clamping mechanism moves the first pole piece, the second pole piece and the diaphragm between the first pole piece and the second pole piece to be right above the lamination platform and the second pole piece is close to the lamination platform. According to the lamination device, the first pole piece and the second pole piece are respectively positioned on the upper surface and the lower surface of the diaphragm, and then the first pole piece and the second pole piece which are positioned are clamped with the diaphragm between the first pole piece and the second pole piece and are moved to the position right above the lamination platform, so that the lamination efficiency is improved.

Description

Lamination device and lamination method

technical field

The application belongs to the technical field of battery processing, and in particular relates to a lamination device and lamination method for laminating a positive electrode sheet, a negative electrode sheet and a separator.

Background technique

The positive electrode sheet, the negative electrode sheet and the separator of the battery need to be laminated during the battery processing and manufacturing process. The existing lamination method mostly adopts the Z-type lamination method, which is basically formed by stacking the negative electrode sheet, the separator and the positive electrode sheet one by one in a Z-shape from bottom to top.

However, in this Z-type lamination method, since the negative electrode sheets and the positive electrode sheets need to be fed to the lamination platform in sequence, the lamination speed is slow, which in turn affects the lamination efficiency of the cells.

SUMMARY OF THE INVENTION

The present application provides a lamination device and lamination method to solve the technical problem of low lamination efficiency.

In order to solve the above technical problems, a technical solution adopted in the present application is to provide a lamination device. The shown lamination device includes: a lamination platform on which lamination operations are carried out; a diaphragm unwinding mechanism having a transition roller for causing the diaphragm to pass through the transition roller toward the The lamination platform is conveyed; the positioning assembly is used to separate a first pole piece and a second pole piece with different polarities at the loading station located between the lamination platform and the transition roller. are positioned on the upper surface and the lower surface of the diaphragm, so that the second pole piece and the first pole piece are arranged opposite to each other; the first clamping mechanism is used for the positioned first pole piece, the The second pole piece is clamped with the diaphragm therebetween; a driving assembly, the first clamping mechanism is mounted on the moving end of the driving assembly, and the driving assembly is used to drive the first clamping mechanism to move to the stack a plate platform, so that the first clamping mechanism moves the first pole piece, the second pole piece and the diaphragm therebetween to just above the lamination platform and makes the second pole piece close to the Lamination platform.

Optionally, the lamination device further includes: a pressure block assembly, which is arranged on a side of the lamination platform close to the loading station, and includes a pressure block and a pressure block driving mechanism, and the pressure block driving mechanism for driving the pressure block to move in a direction perpendicular to the working surface of the lamination platform and in a direction along the width of the diaphragm.

Optionally, the first clamping mechanism includes: an upper clamping block and a lower clamping block, the upper clamping block and the lower clamping block are arranged to be close to each other and at least clamp the first pole piece and the lower clamping block. The front end of the second pole piece facing the lamination platform.

Optionally, both the upper clamping block and the lower clamping block include an avoidance clamping block area, so that when the first clamping mechanism moves directly above the lamination platform and is close to the lamination platform The interference between the upper clamping block and the lower clamping block and the pressing block is avoided.

Optionally, the lamination device further comprises: a flattening assembly, which is arranged on a side of the lamination platform away from the loading station, and is used for the side of the diaphragm away from the loading station. Flatten the fold.

Optionally, the lamination device further comprises: a lamination platform lifting mechanism for driving the lamination platform to ascend and descend.

Optionally, a side of the first pole piece placed on the lamination platform away from the transition roller and a side of the first pole piece placed at the loading station away from the transition roll. The spacing between the sides is twice the size of the width of one cell.

Optionally, the lamination device further comprises: a second clamping mechanism, a side of the first clamping mechanism close to the lamination platform and a side of the second clamping mechanism close to the lamination platform. The spacing between the sides is twice the size of the width of one cell; wherein, when the first clamping mechanism moves to the lamination platform, the second clamping mechanism moves to the loading worker position, and is used to clamp the newly loaded first and second pole pieces and the diaphragm therebetween.

In order to solve the above technical problem, another technical solution adopted in the present application is to provide a lamination method, which includes the following operations. Feeding operation, that is: at the feeding station, a first pole piece and a second pole piece with different polarities are respectively positioned on the upper and lower surfaces of the diaphragm released by the diaphragm roll, so that the The diode piece is disposed opposite the first pole piece; the clamping operation, that is, the positioned first pole piece, the second pole piece and the diaphragm therebetween are clamped by the first clamping mechanism; and The moving operation, that is: driving the first clamping mechanism to move toward the lamination platform, so that the first clamping mechanism moves the first pole piece, the second pole piece and the diaphragm therebetween to the directly above the lamination platform and bring the second pole piece close to the lamination platform.

Optionally, before the feeding operation, the lamination method further comprises: releasing the membrane from the membrane roll through a membrane unwinding mechanism, so that the membrane is conveyed toward the lamination platform via a transition roller; Placing another first pole piece on the diaphragm transferred to the lamination platform, and pressing the other first pole piece and the diaphragm below it on the lamination platform through the pressing block assembly; Wherein, the side of the other first pole piece on the lamination platform that is far away from the transition roll and the side of the first pole piece at the loading station that is far away from the transition roll The distance between them is the width dimension of the two cells.

Optionally, after the moving operation, the lamination method further comprises: releasing the pressed another first pole piece on the pressing block assembly on the lamination platform, and making all The pressing block assembly presses the first pole piece, the second pole piece and the diaphragm therebetween on the lamination platform and the other first pole piece; loosens the first clamping mechanism The clamped first pole piece, the second pole piece and the diaphragm therebetween; move the first clamping mechanism to the loading station, repeat the clamping operation and the moving operation .

Optionally, the lamination method further includes: moving the battery core formed by lamination to a tail winding mechanism, and causing the tail winding mechanism to wind the cut diaphragm on the surface of the battery core.

Optionally, after the moving operation, the lamination method further includes: flattening the folded part of the diaphragm on the side away from the feeding station by a flattening assembly.

Optionally, in the clamping operation, the first clamping mechanism clamps at least the front end portions of the first pole piece and the second pole piece facing the lamination platform.

Optionally, during the moving operation, the lamination platform is lowered by a certain height, so that the clamped first pole piece, the second pole piece and the diaphragm therebetween are moved to the lamination directly above the tablet platform.

Optionally, the lamination method further adopts a second clamping mechanism, a side of the first clamping mechanism close to the lamination platform and a side of the second clamping mechanism close to the lamination platform The distance between them is twice the size of the width of one cell; wherein, the stacking method further includes: when the first clamping mechanism clamps the first pole piece, When the second pole piece and the diaphragm therebetween are transported to the lamination platform, the second clamping mechanism moves to the loading station, so as to clamp the newly loaded first pole piece and the second pole piece. pole piece and the diaphragm therebetween; after the first clamping mechanism releases the clamped first pole piece, the second pole piece and the diaphragm therebetween, the second clamping mechanism will clamp the The tight first and second pole pieces and the diaphragm therebetween are transported to the lamination platform; wait for the second clamping mechanism to release the clamped first and second pole pieces and the diaphragms therebetween. After the diaphragm, the first clamping mechanism and the second clamping mechanism return to their original positions, so that the first clamping mechanism is at the loading station, and the second clamping mechanism It is located on the side of the loading station away from the lamination platform.

The beneficial effects of the present application are: in the embodiment of the present application, the first pole piece and the second pole piece with different polarities are respectively positioned on the upper surface and the lower surface of the diaphragm, and then the positioned first pole piece, The second pole piece is clamped with the diaphragm therebetween and moved to just above the lamination platform, so that the lamination of two pole pieces is completed at one time, so that lamination efficiency is improved. In addition, since the upper clamping block and the lower clamping block of the clamping mechanism are always in contact with the same pole piece during operation, cross-contamination can be avoided.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

FIG. 1 is a schematic structural diagram of a lamination device according to an embodiment of the present application;

2 is a schematic diagram of the relationship between a lamination platform, a pressing block and a flattening block of the lamination device in FIG. 1;

3 is a schematic structural diagram of a first clamping mechanism and a pressing block according to an embodiment of the present application;

4 is a schematic structural diagram of a drive assembly, a first clamping mechanism and a second clamping mechanism of a lamination device according to an embodiment of the present application;

5 is a schematic diagram of a battery cell according to an embodiment of the present application;

6 is a flowchart of a lamination method according to an embodiment of the present application;

FIG. 7 is a schematic process diagram of a lamination method according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

Please refer to FIG. 1 , which is a schematic structural diagram of a lamination device according to an embodiment of the present application, in which the diaphragm 20 , the first pole piece 21 and the second pole piece 22 to be laminated are also shown. The pole piece 21 and the second pole piece 22 may be pole pieces having different polarities. In the embodiment shown in FIG. 1 , the lamination device 10 may include a lamination platform 11, a diaphragm unwinding mechanism 12, a positioning assembly 13, a first clamping mechanism 15, a driving assembly 16, a pressing block assembly 17, a pressure Flat assembly 18 and lamination platform lift mechanism 19.

The lamination platform 11 has a working surface 110 for laminating the diaphragm 20 , the first pole piece 21 and the second pole piece 22 on the working surface 110 . The working surface 110 may generally be the upper surface of the lamination platform 11 . The lamination platform lifting mechanism 19 may include a motor, a lead screw nut or an electric cylinder, etc., for driving the lamination platform 11 to ascend and descend.

The diaphragm unwinding mechanism 12 may include a transition roller 120 and an unwinding roller 121 and other intermediate rollers, such as a diaphragm buffer roller, a diaphragm tension control roller, and the like. The unwinding roller 121 is used to carry the rolled diaphragm 20 , and the transition roller 120 can be used to change the conveying direction of the diaphragm 20 . The membrane unwinding mechanism 12 is used for conveying the membrane 20 toward the lamination platform 11 via the transition roller 120 . Wherein, in the initial transfer, the diaphragm 20 can be transferred to the working surface 110 of the lamination platform 11, so as to press the diaphragm 20 on the lamination platform 11, or place a pole piece on the lamination platform 11 After the upper diaphragm 20 is mounted, the pole piece and the lower diaphragm 20 are pressed against the lamination platform 11 . Wherein, the membrane 20 can be conveyed horizontally from the transition roller 120 to the working surface 110 of the lamination platform 11; of course, the membrane 20 between the transition roller 120 and the lamination platform 11 can also be relatively horizontal. Slightly tilted, for example within 30° up or down. After the separator 20 is transported from the transition roller 120 to the working surface 110 of the lamination platform 11 , the first pole piece 21 , such as a negative plate, can be placed on the lamination platform 11 . Then, the first pole piece 21 and the diaphragm 20 thereunder are pressed against the lamination platform 11 by the pressure block assembly 17 , where the pressure block assembly 17 can be located on the right edge of the lamination platform 11 , that is, the pressure block assembly 17 It is arranged on the side of the lamination platform 11 close to the incoming direction of the pole pieces. The pressing block assembly 17 is used for positioning the boundary of the diaphragm 20 , so that the driving assembly 16 drives the first clamping mechanism 15 to drive the diaphragm 20 to bypass the pressing block assembly 17 and move to just above the lamination platform 11 .

The positioning assembly 13 is used for positioning the first pole piece 21 and the second pole piece 22 on the diaphragm 20 at the loading station 14 located between the lamination platform 11 and the transition roller 120 , respectively. The upper and lower surfaces of the second pole piece 22 are arranged opposite to the first pole piece 21 . The positioning assembly 13 can use adsorption plates 130 and 131 to adsorb the corresponding pole pieces and position them on the surface of the diaphragm 20 . When the first pole piece 21 placed on the lamination platform 11 is a negative pole piece, the first pole piece 21 and the second pole piece 22 placed on the upper and lower surfaces of the separator 20 may also be negative pole pieces and positive plate. Of course, the first pole piece 21 such as the positive electrode piece can also be placed on the lamination platform 11, and the first pole piece 21 and the second pole piece 22 placed on the upper and lower surfaces of the separator 20 can also be positive and negative electrodes, respectively.

The first clamping mechanism 15 is used for clamping the positioned first pole piece 21 , the second pole piece 22 and the diaphragm 20 therebetween. The first clamping mechanism 15 may include an upper clamping block 150 and a lower clamping block 151 and a driving device for driving the upper clamping block 150 and the lower clamping block 151 to move, and the upper clamping block 150 and the lower clamping block 151 are arranged The front ends of the first pole piece 21 and the second pole piece 22 facing the lamination platform 11 are clamped so as to be close to each other. After the first clamping mechanism 15 clamps the first pole piece 21 , the second pole piece 22 and the diaphragm 20 , the positioning assembly 13 can be withdrawn from the first pole piece 21 and the second pole piece 21 . Positioning of pole pieces 22 . It should be noted that the positioning assembly 13 and the first clamping mechanism 15 can be configured to contact different parts of the first pole piece 21 and the second pole piece 22 respectively, so that the positioning assembly 13 can clamp the first pole piece While the piece 21 and the second pole piece 22 are positioned on the diaphragm 20 , the first pole piece 21 , the second pole piece 22 and the diaphragm 20 can also be clamped by the first clamping mechanism 15 .

The first clamping mechanism 15 can be mounted on the moving end 160 of the driving assembly 16 . The driving assembly 16 includes a motor or an air cylinder, etc., for driving the first clamping mechanism 15 to move to the lamination platform 11 , so that the first clamping mechanism 15 moves the first pole piece 21 , the The second pole piece 22 and the diaphragm 20 therebetween are moved to just above the lamination platform 11 and the second pole piece 22 is close to the lamination platform 11 . The manner in which the driving assembly 16 drives the first clamping mechanism 15 to move may include translation, movement along a curve, movement along a fold line, etc., as long as it is ensured that the first clamping mechanism 15 moves to the position just above the lamination platform 11 . The placement orientation of the first pole piece 21 , the second pole piece 22 and the diaphragm 20 therebetween may not be changed.

When the driving assembly 16 drives the first clamping mechanism 15 to move, the lamination platform 11 can be driven by the lamination platform lifting mechanism 19 to descend to a certain height, so as to avoid the collision between the pressing block assembly 17 and the first clamping mechanism 15 and facilitate the The clamped first pole piece 21 , the second pole piece 22 and the diaphragm 20 are placed directly above the lamination platform 11 . In addition, the stacking platform lifting mechanism 19 can also drive the stacking platform 11 to adjust the height, so as to ensure that the pole pieces on the top of the stacking platform 11 are at the same height after each time the material is loaded. In order to ensure that the size of the cells formed by lamination meets the set requirements, the side of the first pole piece 21 placed on the lamination platform 11 for the first time away from the transition roller 120 and the first pole on the feeding station 14 The distance between the sides of the sheet 21 away from the transition roller 120 is twice the size of the width W of one cell 23 , ie, the distance is 2W (see FIGS. 1 and 5 ). In addition, the driving component 16 drives the diaphragm 20 and the second pole piece 22 and the first pole piece 21 on the feeding station 14 to translate to the lamination platform 11. The distance is the size of the width W of the two cells, that is, the distance is 2W.

Referring to FIG. 2 together, the pressing block assembly 17 may be disposed on the side of the lamination platform 11 close to the loading station 14, and may include a pressing block 170 and a pressing block driving mechanism 171, so The pressing block driving mechanism 171 may include a motor or an air cylinder, etc., for driving the pressing block 170 to move in the direction Z perpendicular to the working surface 110 of the lamination platform 11 and along the width of the diaphragm 20 . move in the direction Y. Wherein, the movement of the pressing block 170 in the direction Z can be used to compress the first pole piece 21 and the diaphragm 20 thereunder on the lamination platform 11, or to release the pressing state; the movement of the pressing block 170 in the direction Y can be used In order to disengage the overlap with the diaphragm 20 and the pole pieces thereon, the pressing block 170 can move in the direction Z around the diaphragm 20 and the pole pieces thereon. When the clamped diaphragm 20, the second pole piece 22 and the first pole piece 21 are placed directly above the lamination platform 11, the pressing block 170 on the lamination platform 11 releases the compressed diaphragm and pole piece, so that the The pressing block 170 circumvents the diaphragm 20 and presses the transmitted diaphragm 20 , the second pole piece 22 and the first pole piece 21 on the lamination platform 11 from above. Then, the first clamping mechanism 15 can release the clamped pole piece and the diaphragm, and the driving assembly 16 drives the first clamping mechanism 15 to move to the loading station 14, so as to repeatedly transport the newly loaded first pole piece 21 , the second pole piece 22 and the diaphragm 20 therebetween are placed on the lamination platform 11 . It is easy to understand that, similar to the movement of the pressing block 170 around the diaphragm 20 and the pole pieces thereon, the first clamping mechanism 15 may also have a movement process of bypassing the diaphragm 20 and the pole pieces thereon.

The flattening assembly 18 may be disposed on the side of the lamination platform 11 away from the loading station 14 for pressing the folded portion of the diaphragm 20 away from the loading station 14 . flat. The flattening assembly 18 may include a flattening block 180 and a flattening block drive mechanism 181 . The flattening block driving mechanism 181 can be used to drive the flattening block 180 to move in the direction Z perpendicular to the working surface 110 of the lamination platform 11 and in the direction Y along the width of the diaphragm 20 , and move along the direction X in which the diaphragm 20 is conveyed. The flattening block 180 may have a longer length in the Y direction, so as to flatten more folds of the diaphragm 20 at one time. The flattening block driving mechanism 181 may include an air cylinder, a motor, or the like. Driven by the flattening block driving mechanism 181, the flattening block 180 can be pressed against the folded position of the diaphragm 20 (usually the side away from the pressing block 170), so that the diaphragm 20 can better adhere to the surface of the pole piece.

As shown in FIG. 3 , the lower clamping block 151 of the first clamping mechanism 15 may further include an avoidance clamping block area 152 , so as to move the first clamping mechanism 15 to just above the lamination platform 11 and When approaching the lamination platform 11 , the interference between the lower clamping block 151 and the pressing block 170 is avoided. In this embodiment, the two avoidance pressing block areas 152 are blank areas corresponding to the two pressing blocks 170 respectively; that is, the overlapping part of the lower clamping block 151 and the pressing block 170 is hollowed out, so that the lower clamping block 170 is hollowed out. 151 and the pressing block 170 can be pressed on the lamination platform 11 at the same time. Similarly, the upper clamping block 150 of the first clamping mechanism 15 may also include an avoidance pressure block area corresponding to the avoidance pressure block area 152 in the up-down direction, so as to prevent the first clamping mechanism 15 from moving to the The rigid collision between the upper clamping block 150 and the pressing block 170 occurs directly above the lamination platform 11 and close to the lamination platform 11 .

In addition, a lower clamping block 151 and an upper clamping block 150 with narrower widths can also be provided, so that when the first clamping mechanism 15 moves directly above the lamination platform 11 and is close to the lamination platform 11 , the lower clamp The block 151 and the upper clamping block 150 only correspond to the left part of the lamination platform 11 without overlapping and interference with the pressing block 170 .

As shown in FIG. 4 , the lamination device 10 may further include a second clamping mechanism 15 ′. The second clamping mechanism 15 ′ may have the same structure as the first clamping mechanism 15 and may also be installed on the moving end 160 of the drive assembly 16 . The distance between the side 153 of the first clamping mechanism 15 close to the lamination platform 11 and the side 153 ′ of the second clamping mechanism 15 ′ close to the lamination platform 11 is the distance of one cell. Twice the size of the width W (see FIG. 5 ), so that: when the first clamping mechanism 15 moves to the lamination platform 11 , the second clamping mechanism 15 ′ moves to the loading At the station 14, it is used to clamp the newly loaded first pole piece 21 and the second pole piece 22 and the diaphragm 20 therebetween. In another embodiment, the second clamping mechanism 15' can also be installed on the moving end of another driving component, and the first clamping mechanism 15 and the second clamping mechanism 15' can be two The drive assembly is driven to move synchronously.

The lamination device 10 may further include a cutter assembly (not shown in the figure), when the cells formed by lamination reach a set size, the diaphragm 20 is cut by the cutter assembly, and the cells are unloaded from the lamination platform 11 . Further, the lamination device 10 may further include a tail winding mechanism (not shown in the figure), and the unloaded cells can be moved to the tail winding mechanism, and the tail winding mechanism is used for winding the cut diaphragm on the surface of the cell.

Referring to FIGS. 6 and 7 , the lamination method of the present application will be described below with reference to the lamination device 10 described above. 6 is a flowchart of a lamination method according to an embodiment of the present application, and FIG. 7 is a schematic process diagram of a lamination method according to an embodiment of the present application.

The lamination method of an embodiment of the present application may mainly include the following operations: releasing the diaphragm S1, placing the first layer pole piece S2, feeding S3, clamping S4, moving S5, and repeating S6.

The operation of releasing the membrane S1 is specifically: releasing the membrane from the membrane roll through the membrane unwinding mechanism, so that the membrane is conveyed toward the lamination platform via the transition roller.

1 and FIG. 7(A), during the initial transfer, the membrane 20 can be transported horizontally from the transition roller 120 to the working surface 110 of the lamination platform 11, so as to press the membrane 20 on the lamination platform 11, or place a pole piece on the diaphragm 20 on the lamination platform 11 and then press the pole piece and the diaphragm 20 below it on the lamination platform 11; of course, the transition roller 120 and the The membranes 20 between the lamination platforms 11 may also be slightly inclined with respect to the horizontal, eg within 30° upwards or downwards.

The operation of placing the first layer of pole pieces S2 is specifically: placing a first pole piece, such as a negative pole piece, on the diaphragm that is transferred to the lamination platform, and pressing the first pole piece and the lower pole piece by the pressing block assembly. The diaphragm is pressed against the lamination platform.

1 and 7(A), after the diaphragm 20 is transported from the transition roller 120 to the working surface 110 of the lamination platform 11, the first pole piece 21, such as a negative electrode piece, can be placed on the lamination plate 110. on the tablet platform 11. Then, the first pole piece 21 and the diaphragm 20 thereunder are compressed on the lamination platform 11 by the pressure block 170 of the pressure block assembly 17, where the pressure block assembly 17 can be located at the right edge of the lamination platform 11, namely The pressing block assembly 17 is arranged on the side of the lamination platform 11 close to the incoming direction of the pole pieces. The pressing block 170 of the pressing block assembly 17 is used for positioning the boundary of the diaphragm 20 , so that the driving assembly 16 drives the first clamping mechanism 15 to drive the diaphragm 20 to bypass the pressing block 170 of the pressing block assembly 17 and move to the edge of the lamination platform 11 . Directly above. The movement of the pressing block 170 in the direction Z can be used to compress the first pole piece 21 and the diaphragm 20 thereunder on the lamination platform 11, or to release the pressing state; the movement of the pressing block 170 in the direction Y can be used to disengage The overlap with the diaphragm 20 and the pole pieces thereon enables the pressing block 170 to move in the direction Z around the diaphragm 20 and the pole pieces thereon.

The operation of feeding S3 is specifically: at the feeding station, a first pole piece and a second pole piece with different polarities are respectively positioned on the upper surface and the lower surface of the diaphragm released by the diaphragm roll, so that the The second pole piece is arranged opposite to the first pole piece; wherein, the side of the first pole piece on the lamination platform away from the transition roller and the The distance between the side of the first pole piece away from the transition roller is the width dimension of the two battery cells.

Wherein, as shown in FIG. 1 and FIG. 7(B) , a positioning assembly 13 such as an adsorption plate can be used to adsorb the corresponding pole pieces and position them on the surface of the diaphragm 20 . When the first pole piece 21 placed on the lamination platform 11 is a negative pole piece, the first pole piece 21 and the second pole piece 22 placed on the upper and lower surfaces of the separator 20 may also be negative pole pieces and positive plate. Of course, the first pole piece 21 such as the positive electrode piece can also be placed on the lamination platform 11, and the first pole piece 21 and the second pole piece 22 placed on the upper and lower surfaces of the separator 20 can also be positive and negative electrodes, respectively.

The operation of clamping S4 is specifically: clamping the positioned first pole piece, the second pole piece and the diaphragm therebetween through a first clamping mechanism.

1 and 7(B), when the upper clamping block 150 and the lower clamping block 151 of the first clamping mechanism 15 are close together to clamp the first pole piece 21 and the second pole piece After the piece 22 and the diaphragm 20 are removed, the positioning of the first pole piece 21 and the second pole piece 22 by the positioning assembly 13 can be withdrawn.

In addition, in the operation of clamping S4, the first clamping mechanism clamps at least the front end portions of the first pole piece and the second pole piece facing the lamination platform. By clamping the front ends of the first pole piece and the second pole piece facing the lamination platform by the first clamping mechanism, the first pole piece and the second pole piece can be avoided. In the subsequent movement process, it is pulled and deformed by the diaphragm due to insufficient strength.

The operation of moving S5 is specifically: driving the first clamping mechanism to move toward the lamination platform, so that the first clamping mechanism moves the first pole piece, the second pole piece and the diaphragm therebetween to directly above the lamination platform and with the second pole piece close to the lamination platform.

The state in which the first clamping mechanism 15 moves the first pole piece 21 , the second pole piece 22 and the diaphragm 20 therebetween toward the lamination platform 11 is shown in FIG. 7(C) . . During this period, the diaphragm 20 between the rear end of the first pole piece 21 placed for the first time on the lamination platform 11 and the front ends of the first and second pole pieces at the loading station 14 is moved to Between the first pole piece 21 placed for the first time on the lamination platform 11 and the second pole piece 22 placed at the loading station 14 .

The manner in which the first clamping mechanism 15 moves toward the lamination platform 11 may include translation, movement along a curve, movement along a fold line, etc., as long as it is ensured that the first clamping mechanism 15 moves to the lamination platform 11 in a positive direction. The placement orientation of the upper first pole piece 21 , the second pole piece 22 and the diaphragm 20 therebetween may not be changed.

In addition, during the moving operation, the lamination platform can be lowered by a certain height, so that the clamped first pole piece, the second pole piece and the diaphragm therebetween can be moved to the lamination piece directly above the platform. More specifically, when the driving assembly 16 drives the first clamping mechanism 15 to translate, the lamination platform 11 can be driven by the lamination platform lifting mechanism 19 to descend a certain height, so as to avoid the pressure block assembly 17 and the first clamping mechanism 15 collision, and the clamped first pole piece 21 , the second pole piece 22 and the diaphragm 20 are easily placed directly above the lamination platform 11 . In addition, the stacking platform lifting mechanism 19 can also drive the stacking platform 11 to adjust the height, so as to ensure that the pole pieces on the top of the stacking platform 11 are at the same height after each time the material is loaded.

After the moving operation, the lamination method may further include: flattening the folded part of the diaphragm on the side away from the feeding station by the flattening assembly.

Wherein, driven by the flattening block driving mechanism 181, the flattening block 180 can be pressed against the folded position of the diaphragm 20 (usually the side away from the pressing block 170), so that the diaphragm 20 can better stick to the surface of the pole piece.

Repeating the operation of S6 may specifically include: causing the pressing block assembly on the lamination platform to release the compressed another first pole piece, and causing the pressing block assembly to press the first pole piece. , the second pole piece and the diaphragm therebetween are pressed on the lamination platform and the other first pole piece; the first clamping mechanism is released to release the clamped first pole piece, the second pole piece and the diaphragm therebetween; the first clamping mechanism is moved to the loading station, and the clamping operation and the moving operation are repeated.

1 and 7(D), when the clamped diaphragm 20, the second pole piece 22 and the first pole piece 21 are placed directly above the lamination platform 11, they can be placed at the loading station. Reloading is performed at 14, that is, the new first pole piece 21 and the second pole piece 22 are positioned on the upper surface and the lower surface of the diaphragm 20 respectively.

In addition, after the clamped diaphragm 20, the second pole piece 22 and the first pole piece 21 are placed directly above the lamination platform 11, the pressing block 170 on the lamination platform 11 releases the compressed diaphragm and pole piece , Make the pressing block 170 bypass the diaphragm 20 and press the transmitted diaphragm 20 , the second pole piece 22 and the first pole piece 21 on the lamination platform 11 from above. Then, the first clamping mechanism 15 can release the clamped pole piece and the diaphragm, and the driving assembly 16 drives the first clamping mechanism 15 to move to the loading station 14, so as to repeatedly transport the newly loaded first pole piece 21 , the second pole piece 22 and the diaphragm 20 therebetween are placed on the lamination platform 11, as shown in FIG. 7(E).

The lamination method may also employ a second clamping mechanism, a space between a side of the first clamping mechanism close to the lamination platform and a side of the second clamping mechanism close to the lamination platform. The pitch is twice the size of the width of one cell. Correspondingly, the lamination method may further include: when the first clamping mechanism transports the first pole piece, the second pole piece and the diaphragm therebetween at the loading station to the When the lamination platform is used, the second clamping mechanism moves to the loading station, so as to clamp the newly loaded first and second pole pieces and the diaphragm therebetween; After the mechanism releases the clamped first pole piece, the second pole piece and the diaphragm therebetween, the second clamping mechanism clamps the clamped first pole piece and the second pole piece and the diaphragm therebetween. The diaphragm is transported to the lamination platform; after the second clamping mechanism releases the clamped first and second pole pieces and the diaphragm therebetween, the first clamping mechanism and the second The two clamping mechanisms are returned to their original positions with the first clamping mechanism at the loading station and the second clamping mechanism at the loading station away from the lamination platform side.

In another embodiment, the lamination method may further include: when the battery cells formed by lamination reach the set size, the diaphragm is cut by the cutter assembly, and the battery cells are unloaded from the lamination platform.

In another embodiment, the lamination method may further include: moving the battery core formed by lamination to a tail winding mechanism, and causing the tail winding mechanism to wind the cut diaphragm on the battery core s surface.

To sum up, those skilled in the art can easily understand that the beneficial effects of the present application are: in the embodiment of the present application, by positioning the first pole piece and the second pole piece with different polarities on the upper surface and the lower surface of the diaphragm, respectively, Then clamp the positioned first pole piece, the second pole piece and the diaphragm between them and move them to the top of the lamination platform, so that the lamination of the two pole pieces is completed at one time, so that the lamination to raise efficiency. In addition, since the upper clamping block and the lower clamping block of the clamping mechanism are always in contact with the same pole piece during operation, cross-contamination can be avoided.

The above descriptions are only the embodiments of the present application, and are not intended to limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related technologies Fields are similarly included within the scope of patent protection of this application.

Claims (16)

1. A lamination device, characterized in that the lamination device comprises: A lamination platform on which lamination operations are performed; The diaphragm unwinding mechanism has a transition roller, and the diaphragm unwinding mechanism is used for conveying the diaphragm toward the lamination platform via the transition roller; The positioning assembly is used for positioning a first pole piece and a second pole piece with different polarities at the loading station between the lamination platform and the transition roller, respectively, on the diaphragm of the diaphragm. On the upper surface and the lower surface, the second pole piece is arranged opposite to the first pole piece; a first clamping mechanism for clamping the positioned first and second pole pieces and the diaphragm therebetween; and a driving assembly, the first clamping mechanism is mounted on the moving end of the driving assembly, the driving assembly is used for driving the first clamping mechanism to move to the lamination platform, so that the first clamping mechanism The first pole piece, the second pole piece and the diaphragm therebetween are moved to just above the lamination platform and the second pole piece is brought close to the lamination platform. 2. The lamination device according to claim 1, wherein the lamination device further comprises: The pressing block assembly is arranged on the side of the lamination platform close to the loading station, and includes a pressing block and a pressing block driving mechanism, and the pressing block driving mechanism is used for driving the pressing block in a direction perpendicular to the The lamination platform moves in the direction of the working surface, as well as in the direction along the width of the membrane. 3. The lamination device of claim 2, wherein the first clamping mechanism comprises: an upper clamping block and a lower clamping block, the upper clamping block and the lower clamping block are arranged to be close to each other and at least clamp the front ends of the first pole piece and the second pole piece toward the lamination platform department. 4 . The lamination device of claim 3 , wherein the upper clamping block and the lower clamping block each include an avoidance clamping block area for moving the first clamping mechanism to the lamination. 5 . Directly above the platform and close to the lamination platform, the interference between the upper clamping block and the lower clamping block and the pressing block is avoided. 5. The lamination device according to claim 1, wherein the lamination device further comprises: The flattening component is arranged on the side of the lamination platform away from the material loading station, and is used for flattening the folded part of the diaphragm on the side away from the material loading station. 6. The lamination device according to claim 1, wherein the lamination device further comprises: The stacking platform lifting mechanism is used to drive the stacking platform to ascend and descend. 7 . The lamination device according to claim 1 , wherein the side of the first pole piece placed on the lamination platform that is far from the transition roller and the side of the first pole piece placed at the loading station. 8 . The distance between the side of the first pole piece away from the transition roller is twice the width of one cell. 8. The lamination device according to any one of claims 1-7, wherein the lamination device further comprises: The second clamping mechanism, the distance between the side of the first clamping mechanism close to the lamination platform and the side of the second clamping mechanism close to the lamination platform is the width of one cell Twice the size; wherein, when the first clamping mechanism moves to the lamination platform, the second clamping mechanism moves to the loading station, and is used to clamp the newly loaded material The first pole piece and the second pole piece and the diaphragm therebetween. 9. A lamination method, characterized in that the lamination method comprises: Feeding operation, that is: at the feeding station, a first pole piece and a second pole piece with different polarities are respectively positioned on the upper and lower surfaces of the diaphragm released by the diaphragm roll, so that the The diode piece is arranged opposite to the first pole piece; a clamping operation, namely: clamping the positioned first pole piece, the second pole piece and the diaphragm therebetween by a first clamping mechanism; and The moving operation, that is: driving the first clamping mechanism to move toward the lamination platform, so that the first clamping mechanism moves the first pole piece, the second pole piece and the diaphragm therebetween to the directly above the lamination platform and bring the second pole piece close to the lamination platform. 10 . The lamination method according to claim 9 , wherein, before the feeding operation, the lamination method further comprises: 10 . The membrane is released from the membrane roll by a membrane unwind mechanism, and the membrane is conveyed via a transition roll toward the lamination platform; and Placing another first pole piece on the diaphragm transferred to the lamination platform, and pressing the other first pole piece and the diaphragm below it on the lamination platform through a pressing block assembly; Wherein, the side of the other first pole piece on the lamination platform that is far away from the transition roll and the side of the first pole piece at the loading station that is far away from the transition roll The distance between them is the width dimension of the two cells. 11. The lamination method according to claim 10, wherein after the moving operation, the lamination method further comprises: The pressing block assembly on the lamination platform releases the compressed another first pole piece, and the pressing block assembly compresses the first pole piece, the second pole piece and the The diaphragm therebetween is compressed on the lamination platform and the other first pole piece; causing the first clamping mechanism to release the clamped first pole piece, the second pole piece and the diaphragm therebetween; and The first clamping mechanism is moved to the loading station, and the clamping operation and the moving operation are repeated. 12. The lamination method according to claim 11, wherein the lamination method further comprises: The battery core formed by the lamination is moved to the tail winding mechanism, and the tail winding mechanism is made to wind the cut diaphragm on the surface of the battery core. 13. The lamination method according to claim 10, wherein after the moving operation, the lamination method further comprises: The folded part of the diaphragm on the side away from the feeding station is flattened by the flattening assembly. 14. The method of claim 9, wherein in the clamping operation, the first clamping mechanism at least clamps the orientation of the first pole piece and the second pole piece the front end of the lamination platform. 15 . The lamination method according to claim 9 , wherein during the moving operation, the lamination platform is lowered by a certain height, so as to facilitate the clamped first pole piece, the The second pole piece and the diaphragm therebetween are moved to just above the lamination platform. 16. The lamination method according to any one of claims 9-15, wherein the lamination method further adopts a second clamping mechanism, and the first clamping mechanism is close to the lamination platform. The distance between one side and the side of the second clamping mechanism close to the lamination platform is twice the width of a cell; wherein the lamination method further includes: When the first clamping mechanism transports the first pole piece, the second pole piece and the diaphragm therebetween at the loading station to the lamination platform, the second clamping mechanism Move to the loading station, so as to clamp the newly loaded first and second pole pieces and the diaphragm therebetween; After the first clamping mechanism releases the clamped first pole piece, the second pole piece and the diaphragm therebetween, the second clamping mechanism clamps the clamped first pole piece and the diaphragm. The second pole piece and the diaphragm therebetween are transported onto the lamination platform; and After the second clamping mechanism releases the clamped first and second pole pieces and the diaphragm therebetween, the first and second clamping mechanisms return to their original positions , so that the first clamping mechanism is located at the loading station, and the second clamping mechanism is located at the side of the loading station away from the lamination platform.

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