Passive in-furnace roller passing device for lithium ion battery pole piece

Abstract

The utility model relates to the technical field of lithium batteries, in particular to a roller passing device in a lithium ion battery pole piece passive furnace, which comprises a support structure and a roller passing assembly for conveying pole pieces, and the roller passing assembly is rotatably arranged on the support structure; the roller passing assembly comprises a roller passing shaft, a roller and a connecting structure, the roller passing shaft is rotationally connected with the supporting structure, and the two sides of the roller shaft are rotationally connected with the roller through the connecting structure; the supporting structure comprises a supporting part, a supporting plate and a height adjusting assembly, the supporting plate is rotationally connected with the roller shaft, the supporting plate is connected with the supporting part through the height adjusting assembly, and the height adjusting assembly is arranged to adjust the height of the supporting plate and the roller passing assembly. Even if the heights of the multiple roller passing devices are different, adjustment can be conducted, convenience and rapidness are achieved, cost increase caused by high-precision machining is avoided, the structure is simple, and assembly, maintenance, repair and the like are rapider and more economical.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a passive in-furnace roller device for lithium-ion battery pole pieces. Background Art

[0002] Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high requirements on the environment. During the production process of the positive and negative electrodes of lithium batteries, the evenly stirred slurry needs to be evenly coated on the current collector, and the organic solvent in the slurry needs to be dried. The coating effect has an important impact on the battery capacity, internal resistance, cycle life and safety. To ensure that the electrode is evenly coated, when the battery electrode is dried in the furnace, the conveying assembly therein can stably support the electrode, can passively and flexibly rotate with the electrode, and can effectively prevent the electrode from being strained.

[0003] Existing in-furnace drying and conveying assemblies are usually composed of multiple roller devices, which generally include roller shafts, rollers and bearings. The pole pieces are conveyed by multiple roller devices of the conveying assembly. For example, Chinese patent announcement No. CN220496846U discloses "A drying device and coating system for pole pieces". It places the pole piece on a conveyor belt. During the movement of the pole piece along the conveying direction, the conveyor belt and at least two rotating parts rotate synchronously with the pole piece, which can reduce the friction between the pole piece and the conveyor belt; under the joint action of the conveying assembly, the first anti-folding structure and the bellows, when the pole piece's ear has a tendency to fold, this tendency can be eliminated by pressing or stopping, thereby achieving the purpose of preventing the pole ear from folding.

[0004] Due to production limitations, it is difficult to achieve consistency in the heights of multiple roller devices. In actual production, high-precision equipment is required for high-precision processing to make the heights of multiple roller devices consistent and avoid stretching the pole pieces. However, the cost of using high-precision equipment for high-precision processing is high, which increases the production cost of the conveying assembly. Summary of the Invention

[0005] The purpose of the utility model is to solve the shortcomings of the prior art, such as the high cost of high-precision processing of the roller device using high-precision equipment, which increases the production cost of the conveying component, and to propose a passive in-furnace roller device for lithium-ion battery pole pieces.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A lithium-ion battery electrode passive furnace roller device is designed, comprising a support structure and a roller assembly for conveying the electrode, wherein the roller assembly is rotatably arranged on the support structure;

[0008] The roller assembly includes a roller shaft, a roller, and a connecting structure. The roller shaft is rotatably connected to the support structure, and both sides of the roller shaft are rotatably connected to the roller via the connecting structure.

[0009] The support structure includes a support portion, a support plate and a height adjustment assembly. The support plate is rotatably connected to the roller shaft, and the support plate is connected to the support portion through the height adjustment assembly.

[0010] Furthermore, the height adjustment assembly includes a positioning bolt, which is threadedly connected to the support portion, and a slotted groove that matches the positioning bolt is formed on the support plate.

[0011] Furthermore, the positioning bolt is arranged in the slot and is sleeved with a washer, and two sides of the washer are respectively in contact with the nut of the positioning bolt and the outer wall of the support plate.

[0012] Furthermore, the connection structure includes a bearing provided on the roller shaft, and the bearing is rotatably connected to a positioning ring that cooperates with the roller.

[0013] Furthermore, connecting parts are fixedly provided on both sides of the roller, and the connecting parts are fastened to the positioning ring through a first screw.

[0014] Furthermore, the support portion is provided with a positioning structure that matches the slot.

[0015] Furthermore, the positioning structure includes a positioning block embedded in one side of the support portion, and the positioning block is plugged into the straight groove.

[0016] Furthermore, the positioning block and the support portion are fastened together by a second screw.

[0017] The utility model proposes a lithium-ion battery pole piece passive furnace roller device, which has the following beneficial effects:

[0018] In the utility model, the height of the support plate and the roller assembly is adjusted by setting a height adjustment component. During installation, even if the heights of multiple roller devices are different, they can be adjusted. This is convenient and quick, avoids high-precision processing and increased costs, has a simple structure, and is faster and more economical to assemble, maintain, and repair.

[0019] Secondly, in the present invention, the roller is connected to the positioning ring and the bearing through the first screw, which ensures that the roller assembly can rotate flexibly and prevents axial movement, ensuring that the roller assembly can be stably supported without damaging the pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a schematic structural diagram of a passive furnace roller device for lithium-ion battery pole pieces proposed in the utility model;

[0021] Figure 2 This is a schematic structural diagram of the roller shaft of the utility model;

[0022] Figure 3 This is an enlarged structural diagram of area A of the present utility model;

[0023] Figure 4 This is a schematic diagram of the enlarged structure of area B of the present invention.

[0024] In the figure: 1. Support structure; 11. Support part; 12. Support plate; 13. Height adjustment assembly; 131. Positioning bolt; 132. Slotted groove; 133. Washer; 14. Positioning structure; 141. Positioning block; 2. Roller assembly; 21. Roller shaft; 22. Roller; 23. Connecting structure; 231. Bearing; 232. Positioning ring; 233. Connecting part. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0026] Reference Figure 1-4 This embodiment provides a lithium-ion battery electrode passive furnace roller device, comprising a support structure 1 and a roller assembly 2 for conveying the electrode, the roller assembly 2 being rotatably arranged on the support structure 1;

[0027] The roller assembly 2 includes a roller shaft 21, a roller 22, and a connecting structure 23. The roller shaft 21 is rotatably connected to the support structure 1, and both sides of the roller shaft 21 are rotatably connected to the roller 22 through the connecting structure 23.

[0028] The support structure 1 includes a support portion 11 , a support plate 12 and a height adjustment assembly 13 . The support plate 12 is rotatably connected to the roller shaft 21 . The support plate 12 is connected to the support portion 11 via the height adjustment assembly 13 .

[0029] In the present invention, the height of the support plate 12 and the roller assembly 2 is adjusted by setting a height adjustment component 13. During installation, even if the heights of multiple roller devices are different, they can be adjusted. This is convenient and quick, avoiding high-precision processing and increased costs. The structure is simple, and assembly, maintenance, and repair are faster and more economical. The molds for assembly and maintenance are simpler and more applicable, which improves product efficiency and economic benefits.

[0030] Further, such as Figure 1As shown, in this embodiment, the height adjustment assembly 13 includes a positioning bolt 131, which is threadedly connected to the support portion 11. A straight groove 132 that cooperates with the positioning bolt 131 is provided on the support plate 12. By adjusting the position of the support plate 12, the position of the positioning bolt 131 in the straight groove 132 is changed. When the support plate 12 needs to be fixed, it can be fixed by tightening the positioning bolt 131, which is convenient and quick.

[0031] Furthermore, if Figures 1 to 3 As shown, in this embodiment, the positioning bolt 131 is arranged in a straight groove 132 and is sleeved with a washer 133. The two sides of the washer 133 are respectively in contact with the nut of the positioning bolt 131 and the outer wall of the support plate 12. By setting the washer 133, the washer 133 adopts a spring washer to compensate for the stress relaxation of the positioning bolt 131.

[0032] In this embodiment, if Figure 2 and Figure 4 As shown, the connection structure 23 includes a bearing 231 arranged on the roller shaft 21. The bearing 231 is rotatably connected to a positioning ring 232 that cooperates with the roller 22 to ensure that the roller 22 rotates flexibly, prevents axial movement, and ensures that the roller assembly 2 can be stably supported without damaging the pole piece.

[0033] It should be noted that, in this embodiment, connecting parts 233 are fixedly provided on both sides of the roller 22, and the connecting parts 233 are fastened to the positioning ring 232 by a first screw, so that assembly, maintenance, and repair are faster.

[0034] In some embodiments, a positioning structure 14 that cooperates with the straight groove 132 is provided on the support portion 11 to limit the support plate 12 and prevent it from shaking during operation.

[0035] Furthermore, in some embodiments, the positioning structure 14 includes a positioning block 141 embedded in one side of the support portion 11. The positioning block 141 is plugged into the slot 132. The positioning block 141 fixes the position of the slot 132 and the support plate 12 to prevent them from rotating around the positioning bolt 131.

[0036] Specifically, in some embodiments, the positioning block 141 is fastened to the support portion 11 by a second screw, so that the positioning block 141 can be easily replaced.

[0037] The working method is as follows: during installation, the roller shaft 21, roller 22, bearing 231, and positioning ring 232 are press-fitted with a mold. The connecting parts 233 at both ends of the roller 22 are formed by the mold after press-fitting, and the connecting parts 233 at both ends of the roller 22 are fastened to the positioning ring 232 with small screws to ensure the flexible rotation of the roller assembly 2 and prevent axial movement and other technical requirements, ensuring that the roller assembly 2 can be stably supported without damaging the pole piece;

[0038] When calibrating the height of the roller assembly 2, the position of the positioning bolt 131 in the slot 132 is changed by adjusting the position of the support plate 12, thereby changing the height of the roller assembly 2. At the same time, the moving trajectory of the support plate 12 is restricted by the positioning block 141, so that the heights of multiple roller devices are consistent. When the adjustment is completed and the support plate 12 needs to be fixed, it can be done by tightening the positioning bolt 131, which is convenient and quick.

[0039] When the roller 22 is not flexible in rotating, unscrew the first screw and use the screw hole of the positioning ring 232 to check whether the bearing 231 is damaged. If it is not damaged, add lubricant. If it is damaged, use a disassembly tool to expand the connection part 233 at both ends of the roller 22, remove the positioning ring 232 and the bearing 231, replace the bearing 231, and then use the mold to press and bend it again to meet the technical requirements to ensure that the roller assembly 2 can be stably supported without damaging the pole piece.

[0040] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lithium-ion battery electrode passive furnace roller device, comprising a support structure (1) and a roller assembly (2) for conveying the electrode, characterized in that: The roller assembly (2) is rotatably arranged on the support structure (1); The roller assembly (2) comprises a roller shaft (21), a roller (22) and a connecting structure (23); the roller shaft (21) is rotatably connected to the support structure (1); and both sides of the roller shaft (21) are rotatably connected to the roller (22) via the connecting structure (23); The support structure (1) comprises a support portion (11), a support plate (12) and a height adjustment assembly (13); the support plate (12) is rotatably connected to the roller shaft (21); and the support plate (12) is connected to the support portion (11) via the height adjustment assembly (13).

2. The passive furnace roller device for lithium-ion battery pole pieces according to claim 1, characterized in that: The height adjustment assembly (13) includes a positioning bolt (131), the positioning bolt (131) is threadedly connected to the support portion (11), and the support plate (12) is provided with a slot (132) that matches the positioning bolt (131).

3. The passive furnace roller device for lithium-ion battery pole pieces according to claim 2, characterized in that: The positioning bolt (131) is arranged in the slot (132) and is sleeved with a washer (133), and two sides of the washer (133) are respectively in contact with the nut of the positioning bolt (131) and the outer wall of the support plate (12).

4. The lithium-ion battery pole piece passive furnace roller device according to any one of claims 1 to 3, characterized in that: The connection structure (23) comprises a bearing (231) provided on the roller shaft (21), and the bearing (231) is rotatably connected to a positioning ring (232) that matches the roller (22).

5. The passive furnace roller device for lithium-ion battery pole pieces according to claim 4, characterized in that: Connecting parts (233) are fixedly provided on both sides of the roller (22), and the connecting parts (233) are fastened to the positioning ring (232) via a first screw.

6. The passive furnace roller device for lithium-ion battery pole pieces according to claim 3, characterized in that: The support portion (11) is provided with a positioning structure (14) that matches the slot (132).

7. The passive furnace roller device for lithium-ion battery pole pieces according to claim 6, characterized in that: The positioning structure (14) comprises a positioning block (141) embedded in one side of the support portion (11), and the positioning block (141) is plugged into the slot (132).

8. The passive furnace roller device for lithium-ion battery pole pieces according to claim 7, characterized in that: The positioning block (141) and the support portion (11) are fastened together by a second screw.

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