Novel lithium battery pole piece rolling and slitting mode

Abstract

The invention discloses a novel lithium battery pole piece rolling and slitting mode, and belongs to the technical field of lithium ion batteries, the novel lithium battery pole piece rolling and slitting mode comprises fixing supports, an upper main roller is connected between the fixing supports, a lower main roller is arranged below the upper main roller, the lower main roller is connected with the fixing supports, a first driving motor is arranged on the outer surface of each fixing support, and a second driving motor is arranged on the outer surface of each fixing support. The upper main roller and the lower main roller are both connected with a first driving motor, a feeding roller is connected between the fixing supports, second driving motors are arranged on the fixing supports, and the feeding roller is connected with the second driving motors. Slitting is conducted after rolling is completed in the rolling process, the stress of the pole pieces can be released immediately, the situation of abnormal tension of the pole pieces cannot be caused, meanwhile, the device can adjust the rolling pressure and the rolling width according to requirements, the number of the pole pieces needing to be slit can be adjusted by increasing the upper main roller and the lower main roller, and therefore the effect of improving efficiency is achieved, and the production efficiency is improved. Rolling and slitting are integrated in a real sense, and the occupied area of equipment is greatly reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium-ion batteries, and specifically refers to a novel lithium battery pole piece rolling and cutting method. Background Art

[0002] In the production process of lithium-ion batteries, battery pole pieces are an important part of the battery cells. Battery pole pieces are usually made by rolling the plates and then cutting them. In order to improve manufacturing efficiency, the current related technologies mainly use rolling and cutting systems to process and manufacture battery pole pieces.

[0003] Today's rolling and slitting devices generally roll the pole pieces through the main rolling roller and then pass through the slitting device for slitting. The equipment occupies a large area, and after rolling, the thickness of the pole ear and the material area are inconsistent, and the extension of the pole piece material area and the pole ear are inconsistent, resulting in abnormal pole piece tension, which has a certain impact on the subsequent process. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a novel lithium battery pole piece rolling and slitting method, which effectively solves the problem that the rolling and slitting devices on the market generally pass the pole pieces through the main rolling roller and then pass through the slitting device for slitting, and the equipment occupies a large area. In addition, after rolling, the thickness of the pole ear and the material area are inconsistent, and the extension of the pole piece material area and the pole ear are inconsistent after rolling, resulting in abnormal pole piece tension, which has a certain impact on the subsequent process.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a new type of lithium battery electrode sheet rolling and slitting method, including fixed brackets, an upper main roller is connected between the fixed brackets, a lower main roller is arranged below the upper main roller, and the lower main roller is connected to the fixed bracket, a first drive motor is arranged on the outer surface of the fixed bracket, the upper main roller and the lower main roller are both connected to the first drive motor, a loading roller is connected between the fixed brackets, a second drive motor is arranged on the fixed bracket, the loading roller is connected to the second drive motor, the outer surface of the second drive motor is provided with an electrode sheet to be rolled and slid, a first winding roller is arranged between the fixed brackets, a third drive motor is arranged on the outer surface of the fixed bracket, and the first winding roller is connected to the third drive motor.

[0006] Furthermore, a second winding roller is arranged below the first winding roller, and the second winding roller is arranged between fixed brackets, a fourth drive motor is arranged on the outer surface of the fixed bracket, the second winding roller is connected to the output end of the fourth drive motor, the outer surface of the first winding roller is provided with a winding pole piece after roller pressing and slitting, the outer surface of the second winding roller is provided with a winding pole piece after roller pressing and slitting, a wrinkle removal roller is arranged between the fixed brackets, a deviation correction roller is connected between the fixed brackets, and a main roller edge is arranged on the fixed bracket.

[0007] Furthermore, the upper main roller and the lower main roller are both arranged in sections, and the diameters of the upper main roller and the lower main roller are different.

[0008] Further, the upper main roller is rotatably connected to a fixed bracket, the lower main roller is located directly below the upper main roller, and the lower main roller is rotatably connected to a fixed bracket.

[0009] Furthermore, the first driving motor is a double-headed motor, the upper main roller is fixedly connected to the output end of the fixed bracket, and the lower main roller is fixedly connected to the output end of the first driving motor.

[0010] Furthermore, the feeding roller is rotatably connected to the fixed bracket, the second drive motor is fixedly connected to the outer surface of the fixed bracket, and the feeding roller is fixedly connected to the output end of the second drive motor.

[0011] Furthermore, the electrode piece to be rolled and cut is detachably connected to a loading roller, the first winding roller is rotatably connected to a fixed bracket, and the second winding roller is located directly below the first winding roller, and the second winding roller is rotatably connected to the fixed bracket.

[0012] Furthermore, the third drive motor is fixedly connected to the fixed bracket, the fourth drive motor is fixedly connected to the fixed bracket, the first winding roller is fixedly connected to the output end of the third drive motor, and the second winding roller is fixedly connected to the output end of the fourth drive motor.

[0013] Furthermore, the pole piece that is rolled up after rolling and slitting can be detachably connected to the first winding roller, and the pole piece that is rolled up after rolling and slitting can be detachably connected to the second winding roller.

[0014] Furthermore, the wrinkle removal roller is fixedly connected to the inner surface of the fixed bracket, the deviation correction roller is fixedly connected to the inner surface of the fixed bracket, and the position of the deviation correction roller is lower than that of the wrinkle removal roller, and the edge of the main roller is tightly attached to the fixed bracket and the upper main roller.

[0015] The beneficial effects achieved by the present invention by adopting the above structure are as follows: the device can release the stress of the pole piece immediately after rolling and will not cause abnormal tension of the pole piece during rolling process. At the same time, the device can adjust the roller pressure and rolling width according to demand, and can also adjust the number of pole pieces to be cut by increasing the upper main roller and the lower main roller, so as to achieve the effect of increasing efficiency, truly realizing the integration of rolling and cutting, and greatly reducing the equipment footprint. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional schematic diagram of a novel lithium battery pole piece rolling and cutting method proposed by the present invention Figure 1 ;

[0017] Figure 2 A three-dimensional schematic diagram of a novel lithium battery pole piece rolling and cutting method proposed by the present invention Figure 2 ;

[0018] Figure 3 A three-dimensional schematic diagram of a novel lithium battery pole piece rolling and cutting method proposed by the present invention Figure 3 .

[0019] Among them, 1. fixed bracket; 2. upper main roller; 3. lower main roller; 4. first drive motor; 5. feeding roller; 6. second drive motor; 7. pole piece to be rolled and cut; 8. first winding roller; 9. third drive motor; 10. second winding roller; 11. fourth drive motor; 12. pole piece to be rolled and cut (upper); 13. pole piece to be rolled and cut (lower); 14. wrinkle removal roller; 15. deviation correction roller; 16. edge of main roller.

[0020] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0023] like Figure 1-Figure 3As shown, the present invention proposes a novel lithium battery pole piece rolling and slitting method, including a fixed bracket 1, an upper main roller 2 is connected between the fixed brackets 1, a lower main roller 3 is arranged below the upper main roller 2, and the lower main roller 3 is connected to the fixed bracket 1, a first drive motor 4 is arranged on the outer surface of the fixed bracket 1, the upper main roller 2 and the lower main roller 3 are both connected to the first drive motor 4, a feeding roller 5 is connected between the fixed brackets 1, a second drive motor 6 is arranged on the fixed bracket 1, the feeding roller 5 is connected to the second drive motor 6, a pole piece 7 to be rolled and slid is arranged on the outer surface of the second drive motor 6, a first winding roller 8 is arranged between the fixed brackets 1, a third drive motor 9 is arranged on the outer surface of the fixed bracket 1, and the first winding roller 8 is connected to the third drive motor 9.

[0024] A second winding roller 10 is arranged below the first winding roller 8, and the second winding roller 10 is arranged between the fixed brackets 1, a fourth drive motor 11 is arranged on the outer surface of the fixed bracket 1, the second winding roller 10 is connected to the output end of the fourth drive motor 11, a roller-pressed and slitting winding pole piece (upper) 12 is arranged on the outer surface of the first winding roller 8, a roller-pressed and slitting winding pole piece (lower) 13 is arranged on the outer surface of the second winding roller 10, a wrinkle removal roller 14 is arranged between the fixed brackets 1, a deviation correction roller 15 is connected between the fixed brackets 1, and a main roller edge 16 is arranged on the fixed bracket 1.

[0025] The upper main roller 2 and the lower main roller 3 are both arranged in sections, and the diameters of the upper main roller 2 and the lower main roller 3 are different.

[0026] The upper main roller 2 is rotatably connected to the fixed bracket 1 , and the lower main roller 3 is located directly below the upper main roller 2 , and the lower main roller 3 is rotatably connected to the fixed bracket 1 .

[0027] The first driving motor 4 is a double-headed motor, the upper main roller 2 is fixedly connected to the output end of the fixed bracket 1 , and the lower main roller 3 is fixedly connected to the output end of the first driving motor 4 .

[0028] The feeding roller 5 is rotatably connected to the fixed bracket 1 , the second drive motor 6 is fixedly connected to the outer surface of the fixed bracket 1 , and the feeding roller 5 is fixedly connected to the output end of the second drive motor 6 .

[0029] The electrode piece 7 to be rolled and cut is detachably connected to the feeding roller 5 , the first winding roller 8 is rotatably connected to the fixed bracket 1 , and the second winding roller 10 is located directly below the first winding roller 8 , and the second winding roller 10 is rotatably connected to the fixed bracket 1 .

[0030] The third drive motor 9 is fixedly connected to the fixed bracket 1 , the fourth drive motor 11 is fixedly connected to the fixed bracket 1 , the first winding roller 8 is fixedly connected to the output end of the third drive motor 9 , and the second winding roller 10 is fixedly connected to the output end of the fourth drive motor 11 .

[0031] The rolled-up pole piece (upper) 12 after rolling and slitting can be detachably connected to the first winding roller 8 , and the rolled-up pole piece (lower) 13 after rolling and slitting can be detachably connected to the second winding roller 10 .

[0032] The wrinkle removal roller 14 is fixedly connected to the inner surface of the fixed bracket 1, the deviation correction roller 15 is fixedly connected to the inner surface of the fixed bracket 1, and the position of the deviation correction roller 15 is lower than that of the wrinkle removal roller 14, and the main roller edge 16 is tightly attached to the fixed bracket 1 and the upper main roller 2.

[0033] When used specifically, the device is mainly used in the rolling and slitting process of the lithium battery industry (or other coiled materials). The device is inspired by the noodle rolling knife of a noodle machine. The electrode piece 7 to be rolled and cut is fed to the device through a feeder, and passes through a wrinkle removal roller 14 and a deviation correction roller 15 to reach the upper main roller 2 and the lower main roller 3. The upper main roller 2 and the lower main roller 3 are segmented devices. The upper main roller 2 and the lower main roller 3 are one large and one small. The main roller edge 16 is in close contact with the upper main roller 2 and the lower main roller 3. The upper main roller 2 and the lower main roller 3 can be adjusted up and down according to the thickness of the electrode piece during rotation. The lower main roller 3 has an upward force. The upper main roller 2 and the lower main roller 3 can be 1 out of 4 or 1 out of 2 or 1 out of 3 or more as needed. During the rolling process, the electrode sheet passes through the upper main roller 2 and the lower main roller 3. Because the lower main roller 3 has an upward force, the required thickness of the electrode sheet is achieved through the rolling of the upper main roller 2 and the lower main roller 3, and the upper main roller 2 and the lower main roller 3 have main roller edges 16. After rolling, the electrode sheet is cut by extrusion force, mainly the foil part (large burrs may appear on the material area side). After the electrode sheet is rolled and cut by the upper main roller 2 and the lower main roller 3, it passes through the roller to the first winding roller 8 and the second winding roller 10 to complete the rolling and cutting.

[0034] During the rolling process, the pole pieces are cut immediately after rolling, which can release the stress of the pole pieces immediately, and will not cause abnormal tension of the pole pieces. The device can adjust the roller pressure and rolling width according to demand, and can also adjust the number of pole pieces to be cut by increasing the upper main roller 2 and the lower main roller 3, so as to achieve the effect of increasing efficiency. The above is the overall workflow of the present invention. Just repeat this step next time you use it. The actual operation process is very simple and easy.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0037] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A new type of lithium battery pole piece rolling and cutting method, characterized by: The invention comprises a fixed support (1), wherein an upper main roller (2) is connected between the fixed supports (1), a lower main roller (3) is arranged below the upper main roller (2), and the lower main roller (3) is connected to the fixed support (1), a first drive motor (4) is arranged on the outer surface of the fixed support (1), and the upper main roller (2) and the lower main roller (3) are both connected to the first drive motor (4), a loading roller (5) is connected between the fixed supports (1), a second drive motor (6) is arranged on the fixed supports (1), the loading roller (5) is connected to the second drive motor (6), and a pole piece (7) to be rolled and cut is arranged on the outer surface of the second drive motor (6), a first winding roller (8) is arranged between the fixed supports (1), a third drive motor (9) is arranged on the outer surface of the fixed supports (1), and the first winding roller (8) is connected to the third drive motor (9).

2. A novel lithium battery pole piece rolling and slitting method according to claim 1, characterized in that: A second winding roller (10) is arranged below the first winding roller (8), and the second winding roller (10) is arranged between fixed brackets (1), a fourth drive motor (11) is arranged on the outer surface of the fixed bracket (1), the second winding roller (10) is connected to the output end of the fourth drive motor (11), the outer surface of the first winding roller (8) is provided with a winding pole piece (upper) (12) after roller pressing and slitting, the outer surface of the second winding roller (10) is provided with a winding pole piece (lower) (13) after roller pressing and slitting, a wrinkle removal roller (14) is arranged between the fixed brackets (1), a deviation correction roller (15) is connected between the fixed brackets (1), and a main roller edge (16) is arranged on the fixed bracket (1).

3. A novel lithium battery pole piece rolling and slitting method according to claim 2, characterized in that: The upper main roller (2) and the lower main roller (3) are both arranged in sections, and the diameters of the upper main roller (2) and the lower main roller (3) are different.

4. A novel lithium battery pole piece rolling and slitting method according to claim 3, characterized in that: The upper main roller (2) is rotatably connected to the fixed bracket (1), the lower main roller (3) is located directly below the upper main roller (2), and the lower main roller (3) is rotatably connected to the fixed bracket (1).

5. A novel lithium battery pole piece rolling and slitting method according to claim 4, characterized in that: The first drive motor (4) is a double-headed motor, the upper main roller (2) is fixedly connected to the output end of the fixed bracket (1), and the lower main roller (3) is fixedly connected to the output end of the first drive motor (4).

6. A novel lithium battery pole piece rolling and slitting method according to claim 5, characterized in that: The feeding roller (5) is rotatably connected to the fixed bracket (1), the second drive motor (6) is fixedly connected to the outer surface of the fixed bracket (1), and the feeding roller (5) is fixedly connected to the output end of the second drive motor (6).

7. A novel lithium battery pole piece rolling and slitting method according to claim 6, characterized in that: The electrode piece (7) to be rolled and cut is detachably connected to the loading roller (5), the first winding roller (8) is rotatably connected to the fixed bracket (1), the second winding roller (10) is located directly below the first winding roller (8), and the second winding roller (10) is rotatably connected to the fixed bracket (1).

8. A novel lithium battery pole piece rolling and slitting method according to claim 7, characterized in that: The third drive motor (9) is fixedly connected to the fixed bracket (1), the fourth drive motor (11) is fixedly connected to the fixed bracket (1), the first winding roller (8) is fixedly connected to the output end of the third drive motor (9), and the second winding roller (10) is fixedly connected to the output end of the fourth drive motor (11).

9. A novel lithium battery pole piece rolling and slitting method according to claim 8, characterized in that: The rolled-up pole piece (upper) (12) after rolling and slitting can be detachably connected to the first winding roller (8), and the rolled-up pole piece (lower) (13) after rolling and slitting can be detachably connected to the second winding roller (10).

10. A novel lithium battery pole piece rolling and slitting method according to claim 9, characterized in that: The wrinkle removal roller (14) is fixedly connected to the inner surface of the fixed bracket (1), the deviation correction roller (15) is fixedly connected to the inner surface of the fixed bracket (1), and the position of the deviation correction roller (15) is lower than the position of the wrinkle removal roller (14), and the main roller edge (16) is tightly fitted to the fixed bracket (1) and the upper main roller (2).

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