CN117497874A - Inverted lamination device and method - Google Patents

Abstract

The invention discloses an inverted lamination device and method, and belongs to the technical field of lithium battery processing. The inverted lamination device comprises a conveying assembly and a lamination assembly; the conveying assembly comprises a first conveying line, a second conveying line, a third conveying line and a plurality of jacking modules, wherein the first conveying line, the second conveying line and the third conveying line are sequentially arranged, and the plurality of jacking modules are positioned at two sides of the second conveying line so as to jack corresponding positive electrode plates or negative electrode plates; the lamination assembly comprises a lamination table, a diaphragm unreeling module and a plurality of tabletting modules, wherein the lamination table is positioned above the jacking modules, the diaphragm unreeling module is positioned between the lamination table and the jacking modules, and the diaphragm unreeling module is used for transversely swinging and releasing the diaphragm. The reverse hanging type lamination device provided by the embodiment of the invention can realize convenient transportation and lamination of the pole pieces, and can avoid damaging the negative pole pieces without grabbing and transporting the negative pole pieces by a mechanical arm or a sucker, thereby reducing the production cost.

Description

Inverted lamination device and method

Technical Field

The invention belongs to the technical field of lithium battery processing, and particularly relates to an inverted lamination device and method.

Background

The lithium ion battery is a new generation green high-energy battery with excellent performance, and has the advantages of high voltage, high capacity, low consumption, no memory effect, no public hazard, small volume, small internal resistance, small self discharge, more cycle times and the like, so the lithium ion battery is widely applied to various civil and military fields such as mobile phones, notebook computers, video cameras, digital cameras and the like, and becomes one of the key points of the development of high and new technologies. With the development of new energy lithium ion battery industry, lamination technology in the industry is continuously developed at present.

In the related art, the table surface of the lamination table of the lamination device is arranged upwards, and after the pole pieces are conveyed by the conveying line on one side of the lamination table, the lamination on the conveying line is grabbed and conveyed to the lamination table through the mechanical arm or the sucker to finish lamination (meanwhile, the diaphragm is clamped between the positive pole piece and the negative pole piece).

However, the manipulator or the suction cup is extremely easy to damage the positive plate or the negative plate in the grabbing and transferring process, so that the production cost is increased.

Disclosure of Invention

Aiming at the defects or improvement demands of the prior art, the invention provides an inverted lamination device and method, which aim to realize convenient transportation and lamination of pole pieces, and avoid damaging the negative pole pieces without grabbing and transporting the negative pole pieces by a mechanical arm or a sucker, thereby reducing the production cost.

In a first aspect, the present invention provides an inverted lamination device comprising a transport assembly and a lamination assembly;

the conveying assembly comprises a first conveying line, a second conveying line, a third conveying line and a plurality of jacking modules, wherein the first conveying line, the second conveying line and the third conveying line are sequentially arranged, the first conveying line is used for conveying positive plates towards the second conveying line, the third conveying line is used for conveying negative plates towards the second conveying line, the second conveying line is used for receiving corresponding positive plates or negative plates, and the jacking modules are located on two sides of the second conveying line and are separated from the second conveying line after jacking the corresponding positive plates or negative plates;

the lamination assembly comprises a lamination table, a diaphragm unreeling module and a plurality of tabletting modules, wherein the lamination table is located above the jacking modules, the diaphragm unreeling module is located between the lamination table and the jacking modules, the diaphragm unreeling module is used for transversely swinging and releasing a diaphragm, and the tabletting modules are used for downwards pressing positive plates or negative plates on the table top of the lamination table.

Optionally, each tablet module includes a lifting sliding part and at least one pressing knife, and an output end of the lifting sliding part is in transmission connection with the corresponding pressing knife so as to drive the pressing knife to transversely move and lift.

Optionally, the pressing knife of each pressing module is a side pressing knife or a middle pressing knife, a plurality of side pressing knives are symmetrically arranged at two side edges of the lamination table, and the middle pressing knife is located between two corresponding side pressing knives.

Optionally, the lifting sliding piece comprises a first linear motor and a second linear motor, wherein the output end of the first linear motor is used for driving the second linear motor to slide along a first direction, and the output end of the second linear motor is used for driving the corresponding pressing knife to lift along a second direction.

Optionally, the inverted lamination device further includes a first cutting module and a second cutting module, where the first cutting module includes a first cutting knife and two first rollers arranged at intervals, the two first rollers are used for conveying the positive electrode material onto a first conveying line, the first cutting knife is located above the first conveying line, and the first cutting knife is used for cutting the positive electrode material to obtain a positive electrode plate;

the second cutting module comprises a second cutting knife and two second roll shafts which are arranged at intervals, the two second roll shafts are used for conveying negative electrode materials to a third conveying line, the third cutting knife is located above the second conveying line, and the second cutting knife is used for cutting the negative electrode materials to obtain a negative electrode plate.

Optionally, the reverse hanging lamination device further comprises a correction component, the correction component comprises a camera, an image processor and a three-axis correction module, the camera, the image processor and the three-axis correction module are electrically connected in sequence, the camera is used for photographing a positive plate or a negative plate on the second conveying line, the image processor is used for processing an image, and the three-axis correction module is used for carrying out three-axis correction on the lamination table and the diaphragm unreeling module.

Optionally, the inverted lamination device further comprises a lifting member, wherein the lifting member is used for lifting the lamination table.

Optionally, the second conveying line comprises a plurality of conveying belts, the plurality of conveying belts are arranged at intervals, and each jacking module is inserted between two adjacent conveying belts.

Optionally, the first conveying line, the second conveying line and the third conveying line are all provided with a plurality of vacuum holes which are arranged at intervals so as to adsorb the positive plate or the negative plate.

In a second aspect, the present invention provides an inverted lamination method, which is based on the inverted lamination device of the first aspect, and the inverted lamination method includes:

s1, pressing the diaphragm of the diaphragm unreeling module on the lamination table through a plurality of tabletting modules;

s2, conveying the positive plate to the second conveying line through the first conveying line, enabling the positive plate to be opposite to the lamination table, jacking the positive plate to the lamination table through a plurality of jacking modules, pressing the positive plate on the diaphragm through a plurality of tabletting modules, and transversely swinging and releasing the diaphragm through the diaphragm unreeling module;

s3, conveying the negative electrode plate to the second conveying line through the third conveying line, enabling the negative electrode plate to be opposite to the lamination table, jacking the negative electrode plate to the lamination table again through a plurality of jacking modules, pressing the negative electrode plate on the diaphragm through a plurality of tabletting modules, and transversely swinging and releasing the diaphragm through the diaphragm unreeling module;

s4, repeating the steps S2-S3 until the assembly of the lithium ion battery is completed on the lamination table.

The above-mentioned improved technical features can be combined with each other as long as they do not collide with each other.

In general, the above technical solutions conceived by the present invention have the beneficial effects compared with the prior art including:

when the inverted lamination device provided by the embodiment of the invention is used for assembling a lithium ion battery, firstly, the diaphragms (first-layer diaphragms) of the diaphragm unreeling module are pressed on the lamination table through a plurality of lamination modules. Then, carry the positive plate to the second transfer chain through first transfer chain for the positive plate is just right with the lamination platform, utilizes a plurality of jacking modules jacking positive plate to the lamination bench, and establishes the positive plate pressure on diaphragm (first layer diaphragm) through a plurality of preforming modules (namely diaphragm and positive plate all hang down on the lamination at this moment), utilizes diaphragm unreel module sideslip swing and release diaphragm. In this in-process, under the transport of first transfer chain or subsequent third transfer chain, can accurately receive anodal piece or negative pole piece through the cooperation of second transfer chain to through the jacking module with the accurate jacking of pole piece to lamination platform can, the jacking module only plays the supporting role at the jacking pole piece, can not harm the pole piece, thereby accomplish the convenient transportation of pole piece, need not at this moment and snatch through manipulator or sucking disc and transport the positive pole piece, just can avoid damaging the positive pole piece yet, reduced manufacturing cost.

Then, carry the negative pole piece to the second conveying line through the third transfer chain for the negative pole piece is just right with the lamination platform, utilizes a plurality of jacking modules to jack up the negative pole piece again to the lamination bench, and establishes the negative pole piece pressure on diaphragm (second floor diaphragm) through a plurality of preforming modules, utilizes diaphragm unreel module sideslip swing and release diaphragm, thereby accomplishes the convenient transportation of pole piece, also need not simultaneously to snatch through manipulator or sucking disc and transport the negative pole piece, just also can avoid damaging the negative pole piece, reduced manufacturing cost. And finally, repeating the steps, namely sequentially stacking the positive electrode plate, the diaphragm and the negative electrode plate on a lamination table until the assembly of the lithium ion battery is completed on the lamination table.

That is, the inverted lamination device provided by the embodiment of the invention can realize convenient transportation and lamination of the pole pieces, and can avoid damaging the negative pole pieces without grabbing and transporting the negative pole pieces by a mechanical arm or a sucker, thereby reducing the production cost.

Drawings

Fig. 1 is a schematic structural view of an inverted lamination device according to an embodiment of the present invention;

FIG. 2 is a top view of a conveyor assembly provided by an embodiment of the present invention;

FIG. 3 is a schematic view of an arrangement of a hold-down knife according to an embodiment of the present invention;

fig. 4 is a flowchart of an inverted lamination method according to an embodiment of the present invention.

Like reference numerals denote like technical features throughout the drawings, in particular:

1. a transport assembly; 11. a first conveyor line; 12. a second conveyor line; 121. a conveyor belt; 13. a third conveyor line; 14. a jacking module; 2. a lamination assembly; 21. a lamination stage; 22. a diaphragm unreeling module; 221. a diaphragm buffer volume; 222. a diaphragm; 23. a tabletting module; 231. a pressing knife; 231. a side pressing knife; 232. a medium pressure knife; 3. a first cutting module; 31. a first cutter; 32. a first roller shaft; 4. a second cutting module; 41. a second cutter; 42. a second roller shaft; 5. a camera; 6. discharging rolls; 100. a positive plate; 200. a negative plate.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

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

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples:

fig. 1 is a schematic structural diagram of an inverted lamination device according to an embodiment of the present invention, and as shown in fig. 1, the inverted lamination device includes a conveying assembly 1 and a lamination assembly 2.

Fig. 2 is a top view of a conveying assembly provided in an embodiment of the present invention, as shown in fig. 2, the conveying assembly 1 includes a first conveying line 11, a second conveying line 12, a third conveying line 13, and a plurality of jacking modules 14, where the first conveying line 11, the second conveying line 12, and the third conveying line 13 are sequentially arranged, the first conveying line 11 is used for conveying a positive electrode sheet 100 toward the second conveying line 12, the third conveying line 13 is used for conveying a negative electrode sheet 200 toward the second conveying line 12, the second conveying line 12 is used for receiving a corresponding positive electrode sheet 100 or negative electrode sheet 200, and the plurality of jacking modules 14 are located at two sides of the second conveying line 12 to jack the corresponding positive electrode sheet 100 or negative electrode sheet 200 and then separate from the second conveying line 12.

The lamination assembly 2 includes a lamination stage 21, a diaphragm unreeling module 22, and a plurality of tabletting modules 23, the lamination stage 21 is located above the plurality of jacking modules 14, the diaphragm unreeling module 22 is located between the lamination stage 21 and the jacking modules 14, the diaphragm unreeling module 22 is used for traversing and swinging and releasing the diaphragm 222, and the plurality of tabletting modules 23 are used for pressing down the positive electrode sheet 100 or the negative electrode sheet 200 on the table top of the lamination stage 21.

For the inverted lamination device provided in the embodiment of the invention, when the lithium ion battery is assembled, firstly, the membrane 222 (first layer membrane) of the membrane unreeling module 22 is pressed on the lamination table 21 through the plurality of lamination modules 23. Then, the positive electrode sheet 100 is conveyed onto the second conveying line 12 through the first conveying line 11, so that the positive electrode sheet 100 is opposite to the lamination table 21, the positive electrode sheet 100 is lifted onto the lamination table 21 by using the plurality of lifting modules 14, the positive electrode sheet 100 is pressed onto the diaphragm 222 (the first layer of diaphragm) through the plurality of pressing modules 23 (namely, the diaphragm 222 and the positive electrode sheet 100 are reversely hung on the lamination at the moment), and the diaphragm 222 is transversely moved and swung by using the diaphragm unreeling module 22 and released. In this process, under the transport of first transfer chain 11 or subsequent third transfer chain 13, can accurately receive positive plate 100 or negative plate 200 through the cooperation of second transfer chain 12 to through jacking module 14 with the accurate jacking of pole piece to lamination platform 21 can, jacking module 14 only plays the supporting role at the jacking pole piece, can not harm the pole piece, thereby accomplish the convenient transportation of pole piece, need not at this moment and snatch through manipulator or sucking disc and transport positive plate 100, just also can avoid damaging positive plate 100, manufacturing cost has been reduced.

Then, the negative electrode sheet 200 is conveyed to the second conveying line 12 through the third conveying line 13, so that the negative electrode sheet 200 is opposite to the lamination table 21, the negative electrode sheet 200 is jacked to the lamination table 21 again through the plurality of jacking modules 14, the negative electrode sheet 200 is pressed on the diaphragm 222 (second-layer diaphragm) through the plurality of tabletting modules 23, the diaphragm unreeling module 22 is utilized to transversely swing and release the diaphragm 222, and therefore convenient transportation of the electrode sheet is completed, and meanwhile, the negative electrode sheet 200 is not required to be grabbed and transported through a mechanical arm or a sucker, damage to the negative electrode sheet 200 can be avoided, and the production cost is reduced. Finally, the above steps are repeated, that is, the positive electrode sheet 100, the separator 222 and the negative electrode sheet 200 are sequentially stacked on the lamination table 21 until the assembly of the lithium ion battery is completed on the lamination table 21.

That is, the inverted lamination device provided by the embodiment of the invention can realize convenient transportation and lamination of the pole pieces, and can avoid damaging the negative pole piece 200 without grabbing and transporting the negative pole piece 200 by a mechanical arm or a sucker, thereby reducing the production cost.

Illustratively, the diaphragm unwind module 22 includes a displacement mechanism (not shown) and a diaphragm buffer volume 221, the displacement mechanism driving the diaphragm buffer volume 221 to swing left and right (i.e., zigzag), the diaphragm buffer volume 221 then serving as a film unwind.

In addition, the inverted lamination device further includes an unwind roll 6, where the unwind roll 6 buffers a portion of the diaphragm 222 onto the diaphragm buffer roll 221 and cuts it off with a cutter.

In this embodiment, the second conveying line 12 includes a plurality of conveying belts 121, the plurality of conveying belts 121 are arranged at intervals, each jacking module 14 is inserted between two adjacent conveying belts 121, and uniform jacking of the pole pieces can be achieved by uniform insertion of the jacking modules 14 between the conveying belts 121.

The first conveyor line 11 and the third conveyor line 13 may also be conveyor belts, for example.

Illustratively, the jacking module 14 may be a driving module such as a cylinder or a linear motor, which is not limited in this regard by the present invention.

In this embodiment, each tablet module 23 includes a lifting slider (shown in the figure) and at least one pressing blade, and the output end of the lifting slider is in transmission connection with the corresponding pressing blade so as to drive the pressing blade to move transversely and lift. The lifting and sliding of the pressing tool can be realized through the lifting sliding piece, so that the pole piece pressing and the tool drawing are sequentially realized.

Fig. 3 is a schematic layout view of a pressing knife provided in the embodiment of the present invention, as shown in fig. 3, the pressing knife of each pressing module 23 is a side pressing knife 231 or a middle pressing knife 232, and a plurality of side pressing knives 231 are symmetrically arranged at two sides of the lamination table 21, and the middle pressing knife 232 is located between two corresponding side pressing knives 231.

In the above embodiment, the side pressure cutter 231 plays a role in pressing the edge region of the pole piece, and the middle pressure cutter 232 plays a role in pressing the middle region of the pole piece, so as to realize uniform pressing of the pole piece and avoid deformation of the pole piece under gravity.

In one implementation of the present invention, the plurality of side pressing blades 231 perform an alternating operation, that is, a part of the side pressing blades 231 is used for pressing the positive electrode sheet 100, and another part of the side pressing blades 231 is used for pressing the negative electrode sheet 200, so that when the electrode sheet is lifted, a part of the side pressing blades 231 can be extracted in advance to prepare for pressing the next electrode sheet in advance, thereby improving the pressing efficiency.

Specifically, the lifting sliding piece comprises a first linear motor and a second linear motor (not shown), the output end of the first linear motor is used for driving the second linear motor to slide along a first direction, the output end of the second linear motor is used for driving the corresponding pressing knife to lift along a second direction, sliding and lifting of the pressing knife are achieved through the first linear motor and the second linear motor, and pressing of all pole pieces is achieved.

It should be noted that, in other embodiments of the present invention, the lifting sliding member may be a double acting cylinder, and the two-dimensional movement of the pressing tool may be automatically achieved, which is not limited in the present invention.

With continued reference to fig. 1, the inverted lamination device further includes a first cutting module 3 and a second cutting module 4, where the first cutting module 3 includes a first cutting blade 31 and two first rollers 32 arranged at intervals, the two first rollers 32 are used for conveying the positive electrode material onto the first conveying line 11, the first cutting blade 31 is located above the first conveying line 11, and the first cutting blade 31 is used for cutting the positive electrode material to obtain a positive electrode sheet 100, so that the cutting of the positive electrode material is completed by the first cutting module 3. The cut positive electrode sheet 100 is then conveyed through the first conveyor line 11.

Similarly, the second cutting module 4 includes a second cutting blade 41 and two second rollers 42 arranged at intervals, the two second rollers 42 are used for conveying the negative electrode material onto the third conveying line 13, the second cutting blade 41 is located above the third conveying line 13, and the second cutting blade 41 is used for cutting the negative electrode material to obtain the negative electrode sheet 200, so that the cutting of the negative electrode material is completed through the second cutting module 4. The cut negative electrode sheet 200 is then conveyed through the third conveyor line 13.

Further, the reverse-hanging lamination device further comprises a correction component, the correction component comprises a camera 5, an image processor and a three-axis correction module, the camera 5, the image processor and the three-axis correction module are sequentially and electrically connected, the camera 5 is used for photographing the positive plate 100 or the negative plate 200 on the second conveying line 12, the image processor is used for processing images, and the three-axis correction module is used for correcting the three-axis correction of the lamination table 21 and the diaphragm unreeling module 22.

In the above embodiment, the camera 5 may take a picture of the pole piece, the image processor may identify the position of the pole piece, when the pole piece has a certain displacement (transverse or longitudinal) or rotation and other offsets in the processing process, the image processor may transmit the offset information to the three-axis deviation rectifying module, and the three-axis deviation rectifying module may rectify the assembled pole piece and the assembled diaphragm unreeling module 22 on the lamination table 21 (X direction, Y direction and θ angle direction), so as to ensure that the pole piece to be pressed is accurately attached to the assembled pole piece and the diaphragm.

In addition, when the image processor recognizes that the size of the pole piece has defects, the image processor can convey the information to the manipulator, and the manipulator can transfer the defective pole piece to the waste box.

In this embodiment, the inverted lamination device further includes a lifter (not shown) for lifting the lamination table 21.

It will be readily appreciated that with the continuous lamination, the thickness of the pole pieces on the lamination table 21 increases, which results in continuous variation of the lifting stroke of the jacking module 14 and the presser, and higher control accuracy and control cost. By arranging the lifting piece, the lamination table 21 can be continuously moved upwards while lamination is carried out, so that the pole piece at the lowest part is always at the same height, and the lifting stroke of the jacking module 14 and the pressing knife is prevented from being continuously regulated.

Further, the first, second and third transfer lines 11, 12 and 13 are provided with a plurality of vacuum holes arranged at intervals to adsorb the positive electrode sheet 100 or the negative electrode sheet 200.

In the embodiment, the vacuum holes can be used for realizing the adsorption fixation of the pole pieces, avoiding the pole pieces from moving in the starting and stopping of the conveying line or in the working process, and ensuring the conveying precision of the pole pieces.

Fig. 4 is a flowchart of an inverted lamination method according to an embodiment of the present invention, and as shown in fig. 4, the inverted lamination method is based on the inverted lamination device, and the inverted lamination method includes:

s1, the membrane 222 (first layer membrane) of the membrane unreeling module 22 is pressed against the lamination table 21 by the plurality of lamination modules 23.

S2, conveying the positive plate 100 to the second conveying line 12 through the first conveying line 11, enabling the positive plate 100 to be opposite to the lamination table 21, lifting the positive plate 100 to the lamination table 21 through the plurality of lifting modules 14, pressing the positive plate 100 on the diaphragm 222 (first-layer diaphragm) through the plurality of pressing modules 23, and transversely swinging and releasing the diaphragm 222 through the diaphragm unreeling module 22.

S3, conveying the negative electrode sheet 200 to the second conveying line 12 through the third conveying line 13, enabling the negative electrode sheet 200 to be opposite to the lamination table 21, jacking the negative electrode sheet 200 onto the lamination table 21 again through the plurality of jacking modules 14, pressing the negative electrode sheet 200 on the diaphragm 222 (second-layer diaphragm) through the plurality of tabletting modules 23, and transversely swinging and releasing the diaphragm 222 through the diaphragm unreeling module 22.

S4, repeating the steps S2-S3 until the assembly of the lithium ion battery is completed on the lamination table 21.

According to the reverse hanging type lamination method provided by the embodiment of the invention, the convenient transfer and lamination of the pole pieces can be realized, the negative pole piece 200 can be prevented from being damaged without grabbing and transferring the negative pole piece 200 by a mechanical arm or a sucker, and therefore, the production cost is reduced.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (10)

1. An inverted lamination device, characterized in that it comprises a conveying assembly (1) and a lamination assembly (2);

the conveying assembly (1) comprises a first conveying line (11), a second conveying line (12), a third conveying line (13) and a plurality of jacking modules (14), wherein the first conveying line (11), the second conveying line (12) and the third conveying line (13) are sequentially arranged, the first conveying line (11) is used for conveying positive plates towards the second conveying line (12), the third conveying line (13) is used for conveying negative plates towards the second conveying line (12), the second conveying line (12) is used for receiving corresponding positive plates or negative plates, and the jacking modules (14) are located on two sides of the second conveying line (12) so as to jack the corresponding positive plates or negative plates and then separate from the second conveying line (12);

lamination subassembly (2) are including lamination platform (21), diaphragm unreel module (22) and a plurality of preforming module (23), lamination platform (21) are located a plurality of jacking module (14) top, diaphragm unreel module (22) are located lamination platform (21) with between jacking module (14), diaphragm unreel module (22) are used for sideslip swing and release diaphragm (222), a plurality of preforming module (23) are used for pushing down positive plate or negative plate on the mesa of lamination platform (21).

2. An inverted lamination device according to claim 1, wherein each lamination module (23) comprises a lifting slide and at least one presser blade, the output end of the lifting slide being in driving connection with the corresponding presser blade to drive the presser blade to move laterally and up and down.

3. An inverted lamination device according to claim 2, wherein the pressing blade of each lamination module (23) is a side pressing blade (231) or a middle pressing blade (232), a plurality of side pressing blades (231) are symmetrically arranged at two sides of the lamination table (21), and the middle pressing blade (232) is located between the two corresponding side pressing blades (231).

4. The inverted lamination device of claim 2, wherein the lifting slide comprises a first linear motor and a second linear motor, wherein an output end of the first linear motor is used for driving the second linear motor to slide along a first direction, and an output end of the second linear motor is used for driving the corresponding pressing knife to lift along a second direction.

5. The inverted lamination device according to claim 1, further comprising a first cutting module (3) and a second cutting module (4), wherein the first cutting module (3) comprises a first cutter (31) and two first rollers (32) arranged at intervals, the two first rollers (32) are used for conveying positive electrode materials onto a first conveying line (11), the first cutter (31) is located above the first conveying line (11), and the first cutter (31) is used for cutting positive electrode materials to obtain positive electrode plates;

the second cutting module (4) comprises a second cutting knife (41) and two second roll shafts (42) which are arranged at intervals, the two second roll shafts (42) are used for conveying negative electrode materials to a third conveying line (13), the second cutting knife (41) is located above the third conveying line (13), and the second cutting knife (41) is used for cutting the negative electrode materials to obtain negative electrode plates.

6. The reverse-hanging lamination device according to claim 5, further comprising a correction assembly, wherein the correction assembly comprises a camera (5), an image processor and a three-axis correction module, the camera (5), the image processor and the three-axis correction module are electrically connected in sequence, the camera (5) is used for photographing a positive plate or a negative plate on the second conveying line (12), the image processor is used for processing an image, and the three-axis correction module is used for performing three-axis correction on the lamination table (21) and the diaphragm unreeling module (22).

7. An inverted lamination device according to any of claims 1-6, further comprising a lifting member for lifting the lamination table (21).

8. A reverse-hanging lamination device according to any one of claims 1-6, wherein the second conveyor line (12) comprises a plurality of conveyor belts (121), a plurality of said conveyor belts (121) being spaced apart, each of the jacking modules (14) being interposed between two adjacent conveyor belts (121).

9. An inverted lamination device according to any one of claims 1-6, wherein the first (11), second (12) and third (13) conveyor lines are each provided with a plurality of spaced vacuum holes for adsorbing positive or negative plates.

10. An inverted lamination method, characterized in that it is based on an inverted lamination device according to any one of claims 1-9, comprising:

s1, pressing a diaphragm (222) of the diaphragm unreeling module (22) on the lamination table (21) through a plurality of tabletting modules (23);

s2, conveying the positive plate to the second conveying line (12) through the first conveying line (11) so that the positive plate is opposite to the lamination table (21), lifting the positive plate to the lamination table (21) through a plurality of lifting modules (14), pressing the positive plate on a diaphragm (222) through a plurality of tabletting modules (23), and transversely swinging and releasing the diaphragm (222) through the diaphragm unreeling module (22);

s3, conveying the negative electrode plate to the second conveying line (12) through the third conveying line (13), enabling the negative electrode plate to be opposite to the lamination table (21), jacking the negative electrode plate onto the lamination table (21) again through a plurality of jacking modules (14), pressing the negative electrode plate on a diaphragm (222) through a plurality of tabletting modules (23), and transversely swinging and releasing the diaphragm (222) through the diaphragm unreeling module (22);

s4, repeating the steps S2-S3 until the assembly of the lithium ion battery is completed on the lamination table (21).