Coating device

Patent metadata

Field	Value
Publication number	US-12334533-B2
Application number	US-202418819928-A
Country	US
Kind code	B2
Filing date	Aug 29, 2024
Priority date	May 13, 2022
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

A coating device for applying a coating to a member to be coated includes: a roller assembly including a first spool and second spool that are spaced apart, wherein the first spool is configured to release the member to be coated that is to be coated, and the second spool is configured to roll up the member to be coated after being coated with a coating; a coating assembly including an electrostatic roller set and an electrostatic rod, wherein the electrostatic roller set is at least partially rotatable and is configured to electrostatically adsorb the powder, the electrostatic rod is configured to provide electrostatic adsorption force to the powder on the electrostatic roller set; a composite assembly provided at downstream position of the coating assembly, and configured to connect the powder laid on the member to be coated with the member to be coated.

First claim

What is claimed is:

1. A coating device for applying a coating to a member to be coated, comprising:
a roller assembly, comprising a first spool and a second spool that are spaced apart from each other, the first spool being configured to release the member to be coated, and the second spool being configured to roll up the member to be coated after being coated with the coating;
a coating assembly, arranged at a downstream position of the first spool and an upstream position of the second spool, the coating assembly comprising an electrostatic roller set and an electrostatic rod, the electrostatic roller set being at least partially rotatable and configured to electrostatically adsorb a powder, and the electrostatic rod being configured to provide an electrostatic adsorption force to the powder on the electrostatic roller set, so that the powder is peeled off from the electrostatic roller set and laid on the member to be coated; and
a composite assembly, arranged at a downstream position of the coating assembly, the composite assembly being configured to connect the powder that is laid on the member to be coated with the member to be coated to form the coating connected to the member to be coated.

2. The coating device according to claim 1 , wherein the coating assembly further comprises a scraper configured to scrape off excess powder on the electrostatic roller set.

3. The coating device according to claim 2 , wherein a gap between the scraper and the electrostatic roller set is adjustable.

4. The coating device according to claim 2 , wherein the electrostatic roller set comprises a charging roller and an adsorption roller, the charging roller is configured to release static electricity and make the adsorption roller carry the static electricity, the adsorption roller is rotatable and is configured to electrostatically adsorb the powder, and a feeding gap through which the member to be coated passes is formed between the adsorption roller and the electrostatic rod.

5. The coating device according to claim 4 , wherein the coating assembly further comprises a material box for holding the powder, and the material box comprises an opening arranged towards the adsorption roller.

6. The coating device according to claim 5 , wherein the material box and the scraper are distributed at intervals in a circumferential direction of the adsorption roller, and the material box is provided at an upstream position of the scraper in a rotational direction of the adsorption roller.

7. The coating device according to claim 5 , wherein the charging roller is located at an upstream position of the material box in a rotational direction of the adsorption roller.

8. The coating device according to claim 4 , wherein the coating assembly further comprises an aggregate member configured to collect the powder scraped off from the electrostatic roller set, and the aggregate member is spaced apart from the scraper.

9. The coating device according to claim 8 , wherein the coating device further comprises a material removal member configured to remove residual powder on the adsorption roller, and the material removal member is located at downstream position of the electrostatic roller and abuts against the adsorption roller in the rotational direction of the adsorption roller.

10. The coating device according to claim 1 , further comprising two or more groups of coating assemblies, wherein at least one group of coating assembly is configured to apply the powder to a surface of the member to be coated in a thickness direction, and at least one group of coating assembly is configured to apply the powder to another surface of the member to be coated in the thickness direction.

11. The coating device according to claim 10 , further comprising a plurality of reversing rollers for bending the member to be coated to form at least a first section and a second section that are spaced apart from each other and arranged in parallel, and the plurality of reversing rollers are distributed at intervals along a predetermined trajectory;
at least one group of coating assembly is located between the first section and the second section and is configured to apply the powder to a surface of the first section on a side facing the second section, and at least one group of coating assembly is located on a side of the second section away from the first section and is configured to apply the powder to a surface of the second section away from the first section.

12. The coating device according to claim 1 , wherein the composite assembly comprises an oven and an extrusion roller, the oven is configured to heat the member to be coated and the powder laid on the member to be coated, so that the powder is thermally compounded with the member to be coated, the extrusion roller set is arranged at downstream position of the oven, and the extrusion roller set is configured to extrude the member to be coated and the powder after being thermally compounded.

13. A method comprising:
applying a coating to a member to be coated using a coating device, wherein the coating device comprises:
a roller assembly, comprising a first spool and a second spool that are spaced apart from each other, the first spool being configured to release the member to be coated, and the second spool being configured to roll up the member to be coated after being coated with the coating;
a coating assembly, arranged at a downstream position of the first spool and an upstream position of the second spool, the coating assembly comprising an electrostatic roller set and an electrostatic rod, the electrostatic roller set being at least partially rotatable and configured to electrostatically adsorb a powder, and the electrostatic rod being configured to provide an electrostatic adsorption force to the powder on the electrostatic roller set, so that the powder is peeled off from the electrostatic roller set and laid on the member to be coated; and
a composite assembly, arranged at a downstream position of the coating assembly, the composite assembly being configured to connect the powder that is laid on the member to be coated with the member to be coated to form the coating connected to the member to be coated.

14. The method according to claim 13 , wherein the coating assembly further comprises a scraper configured to scrape off excess powder on the electrostatic roller set.

15. The method according to claim 14 , wherein a gap between the scraper and the electrostatic roller set is adjustable.

16. The method according to claim 14 , wherein the electrostatic roller set comprises a charging roller and an adsorption roller, the charging roller is configured to release static electricity and make the adsorption roller carry the static electricity, the adsorption roller is rotatable and is configured to electrostatically adsorb the powder, and a feeding gap through which the member to be coated passes is formed between the adsorption roller and the electrostatic rod.

17. The method according to claim 16 , wherein the coating assembly further comprises a material box configured to hold the powder, and the material box comprises an opening arranged towards the adsorption roller.

18. The method according to claim 17 , wherein the material box and the scraper are distributed at intervals in a circumferential direction of the adsorption roller, and the material box is provided at an upstream position of the scraper in a rotational direction of the adsorption roller.

19. The method according to claim 17 , wherein the member to be coated is integral

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Zhang Yongli
• Wen Zhihua
• Li Keqiang

Classifications

• B05D1/007

  using an electrostatic field (B05D1/02 - B05D1/16 take precedence) · CPC title

• B05C19/002

  Electrostatic flocking (see for electrostatic projection or pulverisation B05B) · CPC title

• B05D2252/10

  Applying the material on both sides · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title

• B05D2252/02

  of indefinite length · CPC title