Double-cell die cutting, slitting and winding all-in-one machine

Abstract

The utility model relates to a double-cell die cutting, slitting and winding all-in-one machine which comprises a large plate, a positive plate unwinding mechanism, a negative plate unwinding mechanism, a first winding mechanism, a second winding mechanism, a positive plate tab cutting mechanism, a positive plate slitting mechanism, a negative plate tab cutting mechanism and a negative plate slitting mechanism, the positive wide pole piece is made into a positive inner side pole piece and a positive outer side pole piece which are symmetrical through the positive pole piece tab cutting mechanism and the positive pole piece slitting mechanism, and the negative wide pole piece is made into a negative inner side pole piece and a negative outer side pole piece which are symmetrical through the negative pole piece tab cutting mechanism and the negative pole piece slitting mechanism; the first winding mechanism is used for winding the positive electrode inner side pole piece, the negative electrode inner side pole piece, the first upper diaphragm and the first lower diaphragm into an inner side battery cell; the second winding mechanism is used for winding the positive electrode outer side pole piece, the negative electrode outer side pole piece, the second upper diaphragm and the second lower diaphragm into an outer side battery cell. According to the utility model, the laser tab forming machine, the splitting machine and the winding machine are integrated, so that the equipment is highly integrated.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a dual-cell die-cutting, slitting and winding integrated machine. Background Art

[0002] In the production process of lithium batteries, a variety of equipment is needed to carry out different processing steps, for example: making wide-width pole pieces through a coating machine, rolling wide-width pole pieces through a roller press, cutting pole pieces of different widths through a slitting machine, forming pole tabs on the pole pieces through a pole tab forming machine, and winding the pole pieces and diaphragms into bare cells through a winding machine.

[0003] In the traditional lithium battery production process, the processing equipment for various different processes are independent of each other, so that the pole pieces need to be rolled up and unrolled between two adjacent processes. The pole pieces will cause certain losses at the head and tail ends of the rolling and unrolling, which increases the production cost. At the same time, the pole piece rolls need to be transferred between the processing equipment of different processes, which reduces the production efficiency. For this reason, an all-in-one machine has emerged. The all-in-one machine combines two or more processes, thereby reducing the transfer of pole piece rolls, which can greatly improve the production efficiency of the equipment. The existing dual-cell winding all-in-one machine uses a winding needle to wind dual cells at the same time in the winding station. In this solution, because the inner and outer pole pieces and diaphragms will continuously accumulate errors in thickness, the inner and outer two cells will have problems with the inner and outer cell dimensions and the alignment of the pole ears, resulting in inconsistent cutting positions, and thus the consistency of the cells cannot be guaranteed. At the same time, when there is a problem with the incoming material of one of the inner and outer cells, the inner and outer pole pieces are rolled up at the same time, which will affect the winding of the pole piece and diaphragm of the other cell, resulting in a waste of raw materials. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the utility model provides a dual-cell die-cutting, slitting and winding all-in-one machine.

[0005] The utility model provides a dual-cell die-cutting, slitting and winding integrated machine, comprising a large plate, wherein a positive electrode sheet unwinding mechanism and a negative electrode sheet unwinding mechanism are respectively arranged on both sides of the length direction of the large plate, a first winding mechanism and a second winding mechanism are arranged on a winding station in the middle of the large plate, a positive electrode sheet pole ear cutting mechanism and a positive electrode sheet slitting mechanism are arranged between the positive electrode sheet unwinding mechanism and the winding station, a negative electrode sheet pole ear cutting mechanism and a negative electrode sheet slitting mechanism are arranged between the negative electrode sheet unwinding mechanism and the winding station, the positive electrode sheet pole ear cutting mechanism and the negative electrode sheet pole ear cutting structure cut the positive electrode wide width pole sheet and the negative electrode wide width pole sheet respectively, and the positive electrode wide width pole sheet is cut by a positive electrode The electrode sheet and tab cutting mechanism cuts and forms a positive electrode sheet strip with a tab, and the positive electrode sheet strip is cut into a symmetrical positive inner electrode sheet and a positive outer electrode sheet by the positive electrode sheet cutting mechanism. The negative wide electrode sheet is cut and formed into a negative electrode sheet strip with a tab by the negative electrode sheet and tab cutting mechanism, and the negative electrode sheet strip is cut into a symmetrical negative inner electrode sheet and a negative outer electrode sheet by the negative electrode sheet cutting mechanism; the first winding mechanism winds the positive inner electrode sheet, the negative inner electrode sheet, the first upper diaphragm, and the first lower diaphragm into an inner battery cell, and the second winding mechanism winds the positive outer electrode sheet, the negative outer electrode sheet, the second upper diaphragm, and the second lower diaphragm into an outer battery cell.

[0006] In some embodiments, the positive inner pole piece and the negative inner pole piece run on a first vertical plane, the positive outer pole piece and the negative outer pole piece run on a second vertical plane, and the first vertical plane and the second vertical plane are parallel to each other; the first upper diaphragm and the first lower diaphragm wound on the first winding mechanism run on the first vertical plane, and the second upper diaphragm and the second lower diaphragm wound on the second winding mechanism run on the second vertical plane.

[0007] In some of the embodiments, the positive outer pole piece, the negative outer pole piece, the second upper diaphragm, and the second lower diaphragm that are carried on the second vertical plane are fed in a front-to-back staggered manner with the positive inner pole piece, the negative inner pole piece, the first upper diaphragm, and the first lower diaphragm that are carried on the first vertical plane, forming multiple path overlap points on the vertical plane projection that do not affect the independent carrying.

[0008] In some of the embodiments, each of the path overlap points is located above a winding station.

[0009] In some embodiments, a first buffer zone and a second buffer zone are arranged on the conveying path of the inner pole piece of the positive electrode, and a third buffer zone and a fourth buffer zone are arranged on the conveying path of the outer pole piece of the positive electrode, the first buffer zone and the third buffer zone are arranged adjacent to each other, and the second buffer zone and the fourth buffer zone are arranged adjacent to each other.

[0010] In some embodiments, a fifth buffer area is provided on the tape path of the inner pole piece of the negative electrode, a sixth buffer area is provided on the tape path of the outer pole piece of the negative electrode, and the fifth buffer area is located below the sixth buffer area.

[0011] In some of the embodiments, a correction mechanism is provided on the belt conveying path of the positive wide-width pole piece, the negative wide-width pole piece, the positive pole sheet strip, the negative pole sheet strip, the positive inner pole piece, the positive outer pole piece, the negative inner pole piece, and the negative outer pole piece.

[0012] In some of the embodiments, the positive electrode sheet tab cutting mechanism and the negative electrode sheet tab cutting mechanism both perform tab forming operations on the positive wide-width electrode sheet and the negative wide-width electrode sheet by laser.

[0013] In some of the embodiments, the positive electrode sheet slitting mechanism and the negative electrode sheet slitting mechanism both perform slitting operations on the positive electrode sheet strip and the negative electrode sheet strip by die cutting.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the dual-cell die-cutting, slitting and winding all-in-one machine integrates a laser pole piece forming machine, a slitting machine and a winding machine into one, and the equipment is highly integrated, and can complete the unwinding, die-cutting, slitting and winding operations of the pole piece, thereby improving production efficiency, maximizing the benefit of raw materials, reducing energy consumption requirements, reducing equipment footprint, and greatly reducing equipment costs; the inner cell and the outer cell are respectively wound on the first winding mechanism and the second winding mechanism, and the tape path of the diaphragm and the tape path of the slit pole piece are separately controlled to ensure the consistency of the wound inner cell and outer cell, and to ensure the outer dimensions of the cell and the alignment of the pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the planar structure of the dual-core die-cutting, slitting and winding machine of an embodiment of the present application.

[0016] Figure 2 It is a schematic diagram of the structure of the wide-width positive and negative electrode sheets of the embodiment of the present application after die-cutting, slitting and winding operations.

[0017] Reference numerals: 100, winding station;

[0018] 200, positive electrode wide-width electrode sheet; 210, positive electrode sheet strip; 220, positive electrode inner electrode sheet; 230, positive electrode outer electrode sheet;

[0019] 300, negative electrode wide-width electrode sheet; 310, negative electrode sheet strip; 320, negative electrode inner electrode sheet; 330, negative electrode outer electrode sheet;

[0020] 410, first upper diaphragm; 420, first lower diaphragm; 430, second upper diaphragm; 440, second lower diaphragm;

[0021] 510, inner battery cell; 520, outer battery cell;

[0022] 610, first vertical plane; 620, second vertical plane;

[0023] 1. Large board;

[0024] 21. Positive electrode sheet unwinding mechanism; 22. Positive electrode sheet ear cutting mechanism; 23. Positive electrode sheet cutting mechanism;

[0025] 31. Negative electrode sheet unwinding mechanism; 32. Negative electrode sheet tab cutting mechanism; 33. Negative electrode sheet cutting mechanism;

[0026] 41. A first winding mechanism; 42. A second winding mechanism;

[0027] 51, first cache area; 52, second cache area; 53, third cache area; 54, fourth cache area; 55, fifth cache area; 56, sixth cache area;

[0028] 6. Correction mechanism;

[0029] 71. Blank area; 72. Coating area; 73. Tab;

[0030] 8. Path overlap points;

[0031] 91. Wind knife; 92. Brush. DETAILED DESCRIPTION

[0032] The specific implementation modes of the present utility model are introduced with reference to the accompanying drawings.

[0033] refer to Figure 1 The figure shows the planar structure of the dual-cell die-cutting, slitting and winding machine. All the structures in the figure are arranged on the same large plate 1. The large plate 1 integrates the functions of electrode unwinding, diaphragm unwinding, pole ear 73 forming, electrode slitting and cell winding, making the all-in-one machine highly integrated and greatly reducing the equipment procurement cost.

[0034] refer to Figure 1 to Figure 2A dual-cell die-cutting, slitting and winding machine comprises a large plate 1, a positive electrode sheet unwinding mechanism 21 and a negative electrode sheet unwinding mechanism 31 are respectively arranged on both sides of the length direction of the large plate 1, a first winding mechanism 41 and a second winding mechanism 42 are arranged on a winding station 100 in the middle of the large plate 1, a positive electrode sheet ear cutting mechanism 22 and a positive electrode sheet slitting mechanism 23 are arranged between the positive electrode sheet unwinding mechanism 21 and the winding station 100, a negative electrode sheet ear cutting mechanism 32 and a negative electrode sheet slitting mechanism 33 are arranged between the negative electrode sheet unwinding mechanism 31 and the winding station 100, the positive electrode sheet ear cutting mechanism 22 and the negative electrode sheet ear cutting mechanism 32 cut the positive electrode wide width electrode sheet 200 and the negative electrode wide width electrode sheet 300 respectively, and the positive electrode wide width electrode sheet 200 is cut and formed into a electrode ear 73 by the positive electrode sheet ear cutting mechanism 22 The positive electrode sheet strip 210 is cut into symmetrical positive inner electrode sheet 220 and positive outer electrode sheet 230 by the positive electrode sheet cutting mechanism 23; the negative wide electrode sheet 300 is cut into a negative electrode sheet strip 310 with an electrode ear 73 by the negative electrode sheet ear cutting mechanism 32; the negative electrode sheet strip 310 is cut into symmetrical negative inner electrode sheet 320 and negative outer electrode sheet 330 by the negative electrode sheet cutting mechanism 33; the first winding mechanism 41 winds the positive inner electrode sheet 220, the negative inner electrode sheet 320, the first upper separator 410, and the first lower separator 420 into an inner battery cell 510; the second winding mechanism 42 winds the positive outer electrode sheet 230, the negative outer electrode sheet 330, the second upper separator 430, and the second lower separator 440 into an outer battery cell 520.

[0035] The dual-cell die-cutting, slitting and winding machine of the present embodiment integrates a laser tab forming machine, a slitting machine and a winding machine into one, making the equipment highly integrated. Compared with the traditional single machine, the present embodiment is more convenient in maintenance, can reduce the number of operators, reduce energy consumption requirements, reduce the equipment footprint, and greatly reduce the equipment cost; the inner cell 510 and the outer cell 520 of the equipment are respectively wound on the first winding mechanism 41 and the second winding mechanism 42, and the tape paths of the first upper diaphragm 410, the first lower diaphragm 420, the second upper diaphragm 430 and the second lower diaphragm 440, and the tape paths of the positive inner pole piece 220, the positive outer pole piece 230, the negative inner pole piece 320 and the negative outer pole piece 330 after slitting are controlled separately to ensure the consistency of the wound inner cell 510 and the outer cell 520, and to ensure the outer dimensions of the cell and the alignment of the tabs 73.

[0036] In order to ensure that the electrode tape and the diaphragm tape after cutting do not interfere with each other, in this embodiment, reference Figure 1The positive inner pole piece 220 and the negative inner pole piece 320 run on the first vertical plane 610, and the positive outer pole piece 230 and the negative outer pole piece 330 run on the second vertical plane 620, and the first vertical plane 610 and the second vertical plane 620 are parallel to each other; the first upper diaphragm 410 and the first lower diaphragm 420 wound on the first winding mechanism 41 run on the first vertical plane 610, and the second upper diaphragm 430 and the second lower diaphragm 440 wound on the second winding mechanism 42 run on the second vertical plane 620.

[0037] It can be understood that, with such an arrangement, the positive inner pole piece 220 and the negative inner pole piece 320 are carried on the first vertical plane 610, and the positive outer pole piece 230 and the negative outer pole piece 330 are carried on the second vertical plane 620, and the subsequent correction operation should also be carried out based on these two vertical planes, so as to ensure the alignment of the finally wound battery cell.

[0038] The positive outer pole piece 230, the negative outer pole piece 330, the second upper diaphragm 430, and the second lower diaphragm 440 running on the second vertical plane 620, and the positive inner pole piece 220, the negative inner pole piece 320, the first upper diaphragm 410, and the first lower diaphragm 420 running on the first vertical plane 610 are fed in a front-to-back staggered manner, forming a plurality of path overlap points 8 on the vertical plane projection that do not affect the independent running of each other.

[0039] In order to avoid the size of the integrated machine being too large and to fully utilize the area of ​​the large board 1, in this embodiment, reference Figure 1 , in the direction of the orthographic projection of the first vertical plane 610, the tape path of the positive outer pole piece 230, the tape path of the positive inner pole piece 220, the tape path of the first upper diaphragm 410, and the tape path of the negative inner pole piece 320 all have a path overlap point 8, and the tape path of the negative inner pole piece 320, the tape path of the negative outer pole piece 330, and the tape path of the second upper diaphragm 430 all have a path overlap point 8.

[0040] It can be understood that, in this arrangement, the unwinding and tape walking of the first lower diaphragm 420 are located on the right side of the first winding mechanism 41, the unwinding and tape walking of the second lower diaphragm 440 are located on the right side of the second winding mechanism 42, the unwinding of the first upper diaphragm 410 is arranged at the upper left of the first winding mechanism 41, and the unwinding of the second upper diaphragm 430 is arranged at the upper right of the second winding mechanism, and the tape walking paths of the first upper diaphragm 410 and the second upper diaphragm 430 will have a path overlap point 8 with the tape walking path of the electrode piece, by walking the positive electrode on the first vertical surface 610 The inner pole piece 220, the negative inner pole piece 320, and the first upper diaphragm 410 are arranged on the second vertical plane 620 with the positive outer pole piece 230, the negative outer pole piece 330, and the second upper diaphragm 430, so that the diaphragm and the pole piece are staggered at the path overlap point 8, which will not affect the walking of the pole pieces and the diaphragms, so that the unwinding of the first upper diaphragm 410 and the unwinding of the second upper diaphragm 430 are arranged in a relatively open position of the large plate 1 in an interleaved manner, without increasing the area of ​​the large plate 1, and the pole pieces and diaphragm can be arranged on the optimal route.

[0041] In order to provide space for the battery cell tail glue and battery cell cutting, in this embodiment, reference Figure 1 , each path overlap point 8 is located above the winding station 100.

[0042] It is understandable that, with such an arrangement, the winding station 100 needs to be equipped with tail glue, battery cell unloading and other mechanisms below the first winding mechanism 41 and the second winding mechanism 42, so that the optimal route for the diaphragm and the electrode sheet to run is above the winding station 100, and the path overlap point 8 of the diaphragm and the electrode sheet running above the winding station 100 will appear above the winding station 100.

[0043] In order to provide a buffer between the unwinding and slitting of the positive electrode sheet and the winding of the electrode sheet, in this embodiment, reference Figure 1 A first buffer area 51 and a second buffer area 52 are arranged on the conveying path of the inner positive electrode plate 220, and a third buffer area 53 and a fourth buffer area 54 are arranged on the conveying path of the outer positive electrode plate 230. The first buffer area 51 and the third buffer area 53 are arranged adjacent to each other, and the second buffer area 52 and the fourth buffer area 54 are arranged adjacent to each other.

[0044] In order to provide a buffer between the unwinding and slitting of the negative electrode sheet and the winding of the electrode sheet, in this embodiment, reference Figure 1 A fifth buffer area 55 is provided on the conveying path of the negative inner pole piece 320 , a sixth buffer area 56 is provided on the conveying path of the negative outer pole piece 330 , and the fifth buffer area 55 is located below the sixth buffer area 56 .

[0045] It can be understood that, with such a configuration, the first cache area 51, the second cache area 52, the third cache area 53, the fourth cache area 54, the fifth cache area 55, and the sixth cache area 56 all use multiple material rollers to guide the pole pieces to perform Z-shaped conveying to cache the pole pieces. The slitting speed of the pole pieces is uniform, and the winding speed of the pole pieces varies when the battery cells are wound. The buffering is performed through the cache areas, so that the unwinding, slitting, and winding of the pole pieces do not interfere with each other, so that the pole piece unwinding, pole ear 73 forming, slitting, and winding can be smoothly performed on the all-in-one machine.

[0046] In order to ensure the alignment of the pole piece during tape walking and winding, in this embodiment, reference Figure 1 A deviation correction mechanism 6 is provided on the belt conveying paths of the positive wide-width pole piece 200 , the negative wide-width pole piece 300 , the positive pole sheet strip 210 , the negative pole sheet strip 310 , the positive inner pole piece 220 , the positive outer pole piece 230 , the negative inner pole piece 320 , and the negative outer pole piece 330 .

[0047] It is understandable that with such an arrangement, the electrode tape path is longer and the tape feeding process is prone to deviation, requiring multiple correction mechanisms 6 to perform real-time correction to ensure the accuracy of electrode unwinding, electrode ear 73 forming, slitting, and winding, and to ensure the alignment of the battery cells.

[0048] It should be further explained that both the positive wide-width pole piece 200 and the negative wide-width pole piece 300 have blank areas 71 set on both sides in the width direction, and the middle part is a coating area 72. The pole piece ears 73 are formed in the blank area 71, and the pole piece is cut into inner pole pieces and outer pole pieces along the tape running direction in the coating area 72. The positive inner pole piece 220, the negative inner pole piece 320, and the first upper diaphragm 410 and the first lower diaphragm 420 are wound on the first winding mechanism 41 to form an inner battery cell 510, and the positive outer pole piece 230, the negative outer pole piece 330, and the second upper diaphragm 430 and the second lower diaphragm 440 are wound on the second winding mechanism 42 to form an outer battery cell 520, and the inner battery cell 510 and the outer battery cell 520 are symmetrical.

[0049] In order to realize the forming operation of the pole ear 73 of the wide pole piece, in this embodiment, reference is made to Figure 1 and Figure 2 The positive electrode tab cutting mechanism 22 and the negative electrode tab cutting mechanism 32 both perform tab 73 forming operations on the positive wide electrode sheet 200 and the negative wide electrode sheet 300 by laser.

[0050] It is understandable that, with such an arrangement, the blank area 71 of the positive wide-width pole piece 200 and the negative wide-width pole piece 300 is relatively thin, and the pole ears 73 of the pole pieces can be cut continuously and quickly by laser cutting, and dust can be removed by the wind knife 91 after cutting.

[0051] In order to realize the slitting operation of the electrode strip, in this embodiment, reference Figure 1 and Figure 2 The positive electrode sheet cutting mechanism 23 and the negative electrode sheet cutting mechanism 33 both cut the positive electrode sheet strip 210 and the negative electrode sheet strip 310 by die cutting.

[0052] It can be understood that, with such an arrangement, the electrode sheets are die-cut along the conveying direction by means of a rolling cutter die, thereby dividing the positive electrode sheet strip 210 and the negative electrode sheet strip 310 into the positive inner electrode sheet 220, the positive outer electrode sheet 230, the negative inner electrode sheet 320 and the negative outer electrode sheet 330, and the positive inner electrode sheet 220, the positive outer electrode sheet 230, the negative inner electrode sheet 320 and the negative outer electrode sheet 330 are dusted by a brush 92.

[0053] The embodiment of the present application is a device for winding cylindrical lithium batteries, which is a highly integrated and intelligent multi-cell winding device that integrates laser pole ear 73 forming, slitting and winding; the positive wide-width pole piece 200 and the negative wide-width pole piece 300 are formed into pole ears 73 by laser cutting of the positive pole piece pole ear cutting mechanism 22 and the negative pole piece pole ear cutting mechanism 32 to form the positive pole sheet material strip 210 and the negative pole sheet material strip 310, and the positive pole sheet material strip 210 and the negative pole sheet material strip 310 are divided into two by the positive pole sheet slitting mechanism 23 and the negative pole sheet slitting mechanism 33 to form the positive inner pole piece 220 and the positive outer pole piece 220. The positive electrode inner electrode sheet 230, the negative electrode inner electrode sheet 320, and the negative electrode outer electrode sheet 330, the positive electrode inner electrode sheet 220, and the negative electrode inner electrode sheet 320 are transported along the first vertical plane 610, and are wound on the first winding mechanism 41 with the first upper diaphragm 410 and the first lower diaphragm 420 which are also transported on the first vertical plane 610 to form a bare inner battery cell 510, and the positive electrode outer electrode sheet 230 and the negative electrode outer electrode sheet 330 are transported along the second vertical plane 620, and are wound on the second winding mechanism 42 with the second upper diaphragm 430 and the second lower diaphragm 440 which are also transported on the second vertical plane 620 to form a bare outer battery cell 520.

[0054] Among them, the positive wide-width electrode sheet 200 is unwound, corrected before laser cutting, laser cut to form the electrode ear 73 by the positive electrode sheet ear cutting mechanism 22, corrected before slitting, and die-cutting by the positive electrode sheet slitting mechanism 23, and the positive electrode sheet material strip 210 is divided into two, forming two belt paths for the positive inner electrode sheet 220 and the positive outer electrode sheet 230. The positive inner electrode sheet 220 and the positive outer electrode sheet 230 respectively pass through the corresponding independent buffer area, cutting and gluing, electrode sheet traction, tension control, correction before feeding, and feeding mechanism, and enter the first winding mechanism 41 and the second winding mechanism 42 of the winding station 100 respectively. Mechanism 42, the tape path of the negative wide-width electrode sheet 300 is similar to that of the positive wide-width electrode sheet 200, the negative inner electrode sheet 320 and the negative outer electrode sheet 330 formed by laser cutting and die cutting of the negative wide-width electrode sheet 300 respectively enter the first winding mechanism 41 and the second winding mechanism 42 of the winding station 100, the first upper diaphragm 410, the first lower diaphragm 420, the second upper diaphragm 430, and the second lower diaphragm 440 respectively enter the corresponding first winding mechanism 41 and the second winding mechanism 42 after unwinding, tension control, tension detection, length measurement, and deviation correction, and are wound into inner battery cells 510 and outer battery cells 520.

[0055] The embodiment of the present application highly integrates the forming, slitting and winding of the laser pole ear 73, which can reduce the material loss caused by the circulation of the pole piece roll in the three processes, reduce the cost of transit storage, reduce equipment maintenance, and can reduce the corresponding equipment operating staff, reduce the equipment energy consumption of the production line, reduce the floor space of the production line, and increase the unit area output value of the equipment; the inner battery cell 510 and the outer battery cell 520 are separately wound by the first winding mechanism 41 and the second winding mechanism 42, thereby improving the production efficiency, ensuring the consistency of the bare battery cell, and avoiding the material waste problem caused by the simultaneous unwinding and feeding of the inner and outer diaphragms.

[0056] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A dual-core die-cutting, slitting and winding machine, characterized in that: It comprises a large plate, a positive electrode sheet unwinding mechanism and a negative electrode sheet unwinding mechanism are respectively arranged on both sides of the length direction of the large plate, a first winding mechanism and a second winding mechanism are arranged on the winding station in the middle of the large plate, a positive electrode sheet pole ear cutting mechanism and a positive electrode sheet slitting mechanism are arranged between the positive electrode sheet unwinding mechanism and the winding station, a negative electrode sheet pole ear cutting mechanism and a negative electrode sheet slitting mechanism are arranged between the negative electrode sheet unwinding mechanism and the winding station, the positive electrode sheet pole ear cutting mechanism and the negative electrode sheet pole ear cutting structure cut the positive electrode wide width pole sheet and the negative electrode wide width pole sheet respectively, and the positive electrode wide width pole sheet is cut into The positive electrode sheet material strip has a pole ear, and the positive electrode sheet material strip is cut into a symmetrical positive inner pole sheet and a positive outer pole sheet by a positive electrode sheet cutting mechanism. The negative wide pole sheet is cut into a negative electrode sheet material strip with a pole ear by a negative electrode sheet pole ear cutting mechanism, and the negative electrode sheet material strip is cut into a symmetrical negative inner pole sheet and a negative outer pole sheet by a negative electrode sheet cutting mechanism; the first winding mechanism winds the positive inner pole sheet, the negative inner pole sheet, the first upper separator, and the first lower separator into an inner battery cell, and the second winding mechanism winds the positive outer pole sheet, the negative outer pole sheet, the second upper separator, and the second lower separator into an outer battery cell.

2. The dual-core die-cutting, slitting and winding machine according to claim 1, characterized in that: The positive inner pole piece and the negative inner pole piece run on a first vertical plane, and the positive outer pole piece and the negative outer pole piece run on a second vertical plane, and the first vertical plane and the second vertical plane are parallel to each other; the first upper diaphragm and the first lower diaphragm wound on the first winding mechanism run on the first vertical plane, and the second upper diaphragm and the second lower diaphragm wound on the second winding mechanism run on the second vertical plane.

3. The dual-core die-cutting, slitting and winding machine according to claim 2, characterized in that: The positive outer pole piece, negative outer pole piece, second upper diaphragm and second lower diaphragm running on the second vertical plane and the positive inner pole piece, negative inner pole piece, first upper diaphragm and first lower diaphragm running on the first vertical plane are fed in a front-to-back staggered manner, forming multiple path overlap points on the vertical plane projection that do not affect the independent running of each other.

4. The dual-core die-cutting, slitting and winding machine according to claim 3, characterized in that: Each of the path overlap points is located above the winding station.

5. The dual-core die-cutting, slitting and winding machine according to claim 2, characterized in that: A first buffer zone and a second buffer zone are arranged on the tape path of the inner pole piece of the positive electrode, and a third buffer zone and a fourth buffer zone are arranged on the tape path of the outer pole piece of the positive electrode. The first buffer zone and the third buffer zone are arranged adjacent to each other, and the second buffer zone and the fourth buffer zone are arranged adjacent to each other.

6. The dual-core die-cutting, slitting and winding machine according to claim 2, characterized in that: A fifth buffer zone is arranged on the tape path of the inner electrode piece of the negative electrode, a sixth buffer zone is arranged on the tape path of the outer electrode piece of the negative electrode, and the fifth buffer zone is located below the sixth buffer zone.

7. The dual-core die-cutting, slitting and winding machine according to claim 1, characterized in that: The belt paths of the positive wide-width pole piece, the negative wide-width pole piece, the positive pole sheet material strip, the negative pole sheet material strip, the positive inner pole piece, the positive outer pole piece, the negative inner pole piece, and the negative outer pole piece are all provided with a deviation correction mechanism.

8. The dual-core die-cutting, slitting and winding machine according to claim 1, characterized in that: The positive electrode sheet tab cutting mechanism and the negative electrode sheet tab cutting mechanism both perform tab forming operations on the positive electrode wide-width electrode sheet and the negative electrode wide-width electrode sheet by laser.

9. The dual-core die-cutting, slitting and winding machine according to claim 1, characterized in that: The positive electrode sheet cutting mechanism and the negative electrode sheet cutting mechanism both cut the positive electrode sheet material strip and the negative electrode sheet material strip by die cutting.

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