CN-122029037-A - Electrode manufacturing apparatus and setting method thereof

Abstract

An electrode manufacturing apparatus according to an embodiment of the present invention may include a pair of rollers arranged parallel to each other with a gap therebetween, a first bearing rotatably supporting the rollers, a second bearing rotatably supporting the rollers while facing the first bearing with respect to an axial direction of the rollers, and a gap adjusting portion configured to adjust at least one of a gap between two first bearings supporting the pair of rollers and a gap between two second bearings supporting the pair of rollers.

Inventors

• Lin Dongxun
• Huang Jiuyuan
• CAO YUANHE
• Che Minggen
• Ding Menhe

Assignees

• 株式会社LG新能源

Dates

Publication Date

20260512

Application Date

20241101

Priority Date

20231101

Claims (16)

1. 1. An electrode manufacturing apparatus comprising: a pair of rollers arranged side by side with a gap therebetween; the first bearing is provided with a first bearing, the first bearing rotatably supports the roller; A second bearing which faces the first bearing in an axial direction of the roller and rotatably supports the roller, and A gap adjusting unit configured to adjust at least one of a gap between the two first bearings supporting the pair of rollers or a gap between the two second bearings supporting the pair of rollers.
2. 2. The electrode manufacturing apparatus according to claim 1, Wherein the roller comprises: a cylindrical barrel extending in the axial direction, and A neck portion extending from both end portions of the cylindrical member and having a diameter smaller than that of the cylindrical member, and Wherein each of the first bearing and the second bearing comprises: A bearing body having an insertion hole into which the neck portion is inserted, and And the bearing body is arranged on the bearing shell.
3. 3. The electrode manufacturing apparatus according to claim 2, Wherein the inner diameter of the insertion hole of the bearing body is larger than the outer diameter of the neck portion.
4. 4. The electrode manufacturing apparatus according to claim 1, Wherein the gap adjusting unit includes: a first gap adjusting unit for adjusting a gap between the two first bearings, and And the second gap adjusting unit is used for adjusting the gap between the two second bearings.
5. 5. The electrode manufacturing apparatus according to claim 4, Wherein the first gap adjustment unit applies a force in a direction to reduce a gap between the two first bearings, and Wherein the second gap adjustment unit applies a force in a direction to increase the gap between the two second bearings.
6. 6. The electrode manufacturing apparatus according to claim 4, Wherein the first gap adjusting unit includes: a piston for applying pressure to at least one of the two first bearings to reduce a gap between the two first bearings.
7. 7. The electrode manufacturing apparatus according to claim 6, Wherein one of the two first bearings is fixed and the piston applies pressure to the other first bearing toward the first bearing.
8. 8. The electrode manufacturing apparatus according to claim 4, Wherein the second gap adjusting unit includes: And a position adjusting lever that moves between the two second bearings to increase a gap between the two second bearings.
9. 9. The electrode manufacturing apparatus according to claim 8, Wherein at least one of the facing sides of two of said second bearings has an inclined surface, and Wherein the position adjustment lever has an inclined sliding surface arranged to be in contact with the inclined surface.
10. 10. The electrode manufacturing apparatus according to claim 9, Wherein the inclined surfaces are formed in such a direction that the distance between the facing side portions of the two second bearings decreases in a downward direction.
11. 11. The electrode manufacturing apparatus according to claim 8, Wherein the second gap adjusting unit further includes: And the stop piece is used for preventing the position adjusting rod from completely sliding out from between the two second bearings.
12. 12. The electrode manufacturing apparatus according to claim 2, Wherein the pair of rollers have the same size, an Wherein the insertion holes of the bearing body of each of the first bearing and the second bearing have the same inner diameter.
13. 13. A method for setting an electrode manufacturing apparatus, comprising the steps of: A pair of rollers are arranged side by side; Reducing a gap between two first bearings rotatably supporting the pair of rollers to bring the pair of rollers closer to each other, and The gap between the two second bearings facing the two first bearings in the axial direction of the roller is increased to restrict the movement of the pair of rollers.
14. 14. The method for setting up an electrode manufacturing apparatus according to claim 13, Wherein, in the step of bringing the pair of rollers closer to each other, the two first bearings are moved until the two first bearings contact each other.
15. 15. The method for setting up an electrode manufacturing apparatus according to claim 14, Wherein the two first bearings are fixed in contact with each other, an Wherein the step of restricting the movement of the pair of rollers is performed in a fixed state of the two first bearings.
16. 16. The method for setting up an electrode manufacturing apparatus according to claim 13, Wherein in the step of restricting the movement of the pair of rollers, the two second bearings are moved to positions where they can no longer be moved.

Description

Electrode manufacturing apparatus and setting method thereof Cross Reference to Related Applications The present application claims priority from korean patent application No. 10-2023-0149083 filed in korea at 1 of 11 in 2023 and korean patent application No. 10-2024-0153688 filed in korea at 1 of 11 in 2024, the disclosures of which are incorporated herein by reference. Technical Field The present disclosure relates to an electrode manufacturing apparatus and a setting method for setting the electrode manufacturing apparatus, and more particularly, to an electrode manufacturing apparatus and a setting method thereof that can solve the problem that a gap between a pair of rollers increases during rolling of an electrode film. Background Secondary batteries are generally manufactured by receiving an electrode assembly including a stack of a positive electrode (or cathode), a separator, and a negative electrode (or anode) in a cartridge such as a cylindrical can or a prismatic pouch. Each of the positive electrode and the negative electrode is manufactured by applying an electrode paste to both surfaces (or one surface) of an electrode foil as a current collector. There are various methods for preparing and adhering an electrode paste to an electrode foil, and methods including forming the electrode paste into a film shape, stacking and bonding are known. In this case, the electrode film and the electrode foil are rolled after adhesion or simultaneously adhered and rolled to manufacture an electrode, followed by a subsequent process of forming electrode tabs in an uncoated portion of the electrode foil that is not covered with the electrode film and is exposed to the outside. Meanwhile, as is well known, a method for manufacturing an electrode film uses a powder tabletting process in which a mixture in a powder state including an active material, a carbon material, and a binder as main components is formed into a sheet. The powder compaction process is performed by feeding the mixture in powder form between compaction rollers. The pressure and shear forces are applied to the mixture fed between the sheeting rollers by the rotational speed differential between the sheeting rollers to form a sheet electrode film. In addition, the powder pressing process is followed by a rolling process of reducing the thickness of the electrode film to a target thickness. In the rolling process, the thickness of the electrode film is reduced as the electrode film continuously passes between the adjacent rolling rolls. In this case, the process is performed by adjusting the gap between adjacent calender rolls, the ratio of the rotational speed difference (tip speed ratio), and the temperature of the calender rolls. Meanwhile, in a manufacturing apparatus including a sheeting roller and a calendaring roller, whereby an object is rolled while passing between adjacent rollers, an initially set gap between the adjacent rollers is gradually increased during rolling of an electrode film. This occurs due to the gap between the "roller" and the "hole coupled to the bearing of the roller". Hereinafter, it will be described in more detail. Fig. 1a is a schematic exploded view of a conventional electrode manufacturing apparatus, and fig. 1b is a schematic view showing rolling of an electrode film E by a pair of rollers shown in fig. 1 a. The electrode manufacturing apparatus may include a pair of rollers 10. Referring to fig. 1a, each roller 10 may include a cylindrical barrel 11 and a neck 12 extending from both ends of the barrel 11 and having a smaller diameter than the barrel 11. A pair of rollers 10 may be arranged side by side with a gap therebetween. More specifically, the gap may refer to a gap between the cylindrical members 11 of the pair of rollers 10. In addition, a bearing 20 may be coupled to each roller 10. The bearings 20 may be configured to secure each roller 10 and allow the roller 10 to rotate while supporting the load of the roller 10. Referring to fig. 1b, the bearing 20 may include a bearing body 21 and a bearing housing 22, the bearing body 21 having an insertion hole 21a into which the neck portion 12 of the roller 10 is inserted, the bearing body 21 being mounted on the bearing housing 22. In general, the bearing body 21 may include an inner diameter defining an insertion hole 21a, an outer diameter mounted on the bearing housing 22, and a plurality of rolling members (e.g., balls) located between the inner and outer diameters. For smooth coupling between the neck 12 and the bearing 20, the inner diameter of the insertion hole 21a of the bearing 20 is generally larger than the outer diameter of the neck 12. However, as shown in fig. 1b, a gap is generated between the insertion hole 21a of the bearing 20 and the neck portion 12 of each roller 10, and thus it may be difficult to constantly maintain the size of the gap between the pair of rollers 10. Therefore, the rolling amount of the object, i.e., the electrode fi