CN-122028989-A - Gasket plate and slot die coater comprising gasket plate

Abstract

A gasket plate according to an embodiment of the present invention includes a gasket body including stainless steel and at least one coating layer coated on a surface of the gasket body.

Inventors

• ZHANG ZHIXIONG
• An Bingxun
• Pu Chengxu
• Huang Roujin
• LI ZHENGYUAN
• JIN ZHOUXI

Assignees

• 株式会社LG新能源

Dates

Publication Date

20260512

Application Date

20250626

Priority Date

20240911

Claims (15)

1. 1. A gasket plate, comprising: A gasket body comprising stainless steel, and At least one coating layer coated on a surface of the gasket body.
2. 2. The gasket plate of claim 1, wherein, The gasket plate is configured to drain active material, and The gasket body includes: A first side end portion provided on one side in the shape of a plate, A second side end portion provided on the other side in the shape of a plate, and At least one rib disposed between the first and second side end portions, and disposed parallel to the first and second side end portions.
3. 3. The gasket plate according to claim 2, wherein an opening portion in which at least one region is cut away from an end of the gasket body is provided between the first side end portion and the rib, between the rib and the second side end portion, or between the ribs.
4. 4. The gasket plate of claim 1, wherein the gasket body comprises SUS304 material.
5. 5. The gasket plate of claim 1, wherein the coating layer is tacky.
6. 6. The gasket plate of claim 1, wherein the coating layer is resilient.
7. 7. The gasket plate of claim 1, wherein the coating layer comprises a fluorocarbon resin coating material.
8. 8. The gasket plate of claim 1, wherein the coating layer is applied by a spray coating method or a multiple overlap coating method.
9. 9. The gasket plate of claim 1, wherein the coating layer comprises a plurality of coating layers.
10. 10. The gasket plate of claim 1, wherein one of the coating layers has a thickness of 3 to 6 μιη.
11. 11. The gasket plate according to claim 2, wherein the rib is configured to have at least one step in a thickness direction of the rib.
12. 12. The gasket plate of claim 2, wherein, The rib includes: a central portion provided at the center, an A step portion provided on both side ends of the central portion, and configured to have a thickness smaller than that of the central portion.
13. 13. The gasket plate of claim 1, wherein a thickness tolerance of the gasket plate falls within a range of 99% to 102%.
14. 14. A slot die coater comprising: A first mold block; a second mold block configured to face the first mold block, and The gasket plate of any one of claims 1 to 13 interposed between the first and second mold blocks to form a groove.
15. 15. A method for manufacturing a gasket plate, the method comprising: Preparing a gasket body; Cleaning the surface of the gasket body to remove pollutants; Applying at least one coating layer on the gasket body by a spray coating method or a multiple overlapping coating method, and Curing the coating layer.

Description

Gasket plate and slot die coater comprising gasket plate Technical Field The present disclosure relates to gasket plates and slot die coaters including gasket plates. Background Unlike primary batteries that cannot be charged, secondary batteries refer to chargeable and dischargeable batteries, and are applied not only to portable devices but also to Electric Vehicles (EVs), hybrid Electric Vehicles (HEVs), and the like driven by an electric drive source. The types of secondary batteries that are widely used at present include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel metal hydride batteries, nickel zinc batteries, and the like. The operating voltage of such unit secondary battery cells, i.e., unit battery cells, is about 2.5V to 4.6V. Therefore, when a higher output voltage is required, a plurality of battery cells are connected in series to configure the battery pack. In addition, a plurality of battery cells may be connected in parallel according to the charge/discharge capacity required for the battery pack to configure the battery pack. Therefore, the number of battery cells included in the battery pack may be differently set according to a desired output voltage or charge/discharge capacity. When a battery pack is configured by connecting a plurality of battery cells in series or in parallel, it is common to first configure a battery module including at least one battery cell, preferably a plurality of battery cells, and then configure the battery pack by adding other components while using at least one battery module. Here, the battery module refers to a component in which a plurality of battery cells are connected in series or in parallel, and the battery pack refers to a component in which a plurality of battery modules are connected in series or in parallel to improve capacity, output, and the like. Note that in the process of manufacturing such a secondary battery, during the slot-die coating process of applying the electrode active material slurry to the electrode current collector, it is necessary to perform a thickness polishing process using a conventional SUS430 material in order to control the tolerance of the gasket thickness. However, bending of the pad occurs due to heat generation during the pad thickness polishing process, thereby increasing processing difficulty and resulting in low yields of good products. In addition, the above materials have disadvantages of long manufacturing cycle and very high processing cost. Disclosure of Invention Technical problem It is an object of the present disclosure to minimize thickness tolerances of gasket plates. It is another object of the present disclosure to ensure the yield and economic efficiency of gasket plates. It is a further object of the present disclosure to shorten the manufacturing cycle of the gasket plate. However, the technical problems solved by the present disclosure are not limited to those described above, and other problems not explicitly mentioned will be apparent to those skilled in the art from the following description of the present disclosure. Technical proposal In order to solve the above-described problems, a gasket plate according to an exemplary embodiment of the present disclosure includes a gasket body including stainless steel, and at least one coating layer coated on a surface of the gasket body. In one aspect of the present disclosure, a gasket plate is configured to drain active material, and a gasket body may include a first side end portion disposed on one side in a plate shape, a second side end portion disposed on the other side in a plate shape, and at least one rib disposed between and parallel to the first side end portion and the second side end portion. Preferably, an opening portion in which at least one region is cut away from an end of the gasket body may be provided between the first side end portion and the rib, between the rib and the second side end portion, or between the ribs. In another aspect of the present disclosure, the gasket body may include SUS304 material. Preferably, the coating layer is tacky. In another aspect of the present disclosure, the coating layer is elastic. In one aspect of the present disclosure, the coating layer may include a fluorocarbon resin coating material. Preferably, the coating layer may be coated by a spray coating method or a multiple overlap coating method. In one aspect of the present disclosure, the coating layer may include a plurality of coating layers. Preferably, the thickness of one layer of the coating layer may be configured to be 3 μm to 6 μm. In another aspect of the present disclosure, the rib may be configured to have at least one stepped portion in a thickness direction of the rib. Preferably, the rib may include a central portion disposed at the center, and step portions disposed on both side ends of the central portion and configured to have a thickness smaller than that of the central portion. Preferab