Coating shim and coating device

Patent metadata

Field	Value
Publication number	US-11975355-B2
Application number	US-202318348370-A
Country	US
Kind code	B2
Filing date	Jul 7, 2023
Priority date	Jul 30, 2021
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

A coating shim and a coating device, for applying a first slurry and a second slurry to an object to be coated are provided. The coating shim includes: a first flow channel for applying the first slurry to the object to be coated to form a first coating layer; and a second flow channel for applying the second slurry to the object to be coated to form a second coating layer. The first flow channel has a first slurry outlet at a first end face of the shim facing the object to be coated, the second flow channel has a second slurry outlet at the first end face, and the first slurry outlet and the second slurry outlet are configured to partially overlap in a thickness direction of the shim, such that the first coating layer and the second coating layer partially overlap in the thickness direction of the shim.

First claim

The invention claimed is:

1. A coating shim for applying a first slurry and a second slurry to an object to be coated, the coating shim comprising:
a first flow channel for applying the first slurry to the object to be coated to form a first coating layer; and
a second flow channel for applying the second slurry to the object to be coated to form a second coating layer,
wherein the first flow channel has:
a side surface in the arrangement direction of the first flow channel and the second flow channel; and
a first slurry outlet at a first end face of the coating shim facing the object to be coated,

wherein the second flow channel has a second slurry outlet at the first end face,
wherein the first slurry outlet is arranged spaced apart from the second slurry outlet by a distance (w 1 ) in a length direction of the coating shim, the side surface of the first flow channel includes a sloped portion, and the sloped portion and the second slurry outlet are configured to partially overlap in a thickness direction of the coating shim, such that the first coating layer and the second coating layer partially overlap in the thickness direction of the coating shim.

2. The coating shim according to claim 1 , wherein the height of the second slurry outlet in the thickness direction of the shim is less than the thickness of the coating shim.

3. The coating shim according to claim 1 , wherein the first slurry outlet and the second slurry outlet have an overlapping width of 0.1-9 mm in an arrangement direction of the first flow channel and the second flow channel.

4. The coating shim according to claim 1 , wherein the second flow channel comprises an opening portion extending to the second slurry outlet, the opening portion having a width in an arrangement direction of the first flow channel and the second flow channel that increases in a direction from a slurry inlet of the second flow channel to the second slurry outlet.

5. The coating shim according to claim 1 , wherein the side surface of the first flow channel further comprises a step portion connected to the sloped portion.

6. The coating shim according to claim 5 , wherein the step portion has a height of 0.01-4.8 mm in the thickness direction of the coating shim.

7. The coating shim according to claim 5 , wherein the slope portion has a width in an arrangement direction of the first flow channel and the second flow channel, and the width is not greater than 10 mm.

8. The coating shim according to claim 5 , wherein the slope portion has a length of 1-50 mm in an outflow direction of the first slurry.

9. The coating shim according to claim 1 , wherein the second flow channel comprises a groove portion and a slurry inlet, the groove portion is interconnecting the slurry inlet of the second flow channel and the second slurry outlet, and the slurry inlet penetrates the coating shim in the thickness direction of the coating shim.

10. The coating shim according to claim 9 , wherein the groove portion comprises an inlet section, an outlet section and a communication section; in the thickness direction of the shim, the inlet section and the outlet section are respectively located on two sides of the coating shim; and the inlet section is connected to the slurry inlet, the communication section is connected to the inlet section and the outlet section, and the outlet section is connected to the second slurry outlet.

11. The coating shim according to claim 10 , wherein the coating shim has a thickness of 0.2-5 mm, and the inlet section and the outlet section each have a depth of 5%-95% of the thickness of the coating shim.

12. A coating device, comprising:
a lower die,
an upper die, and
the coating shim of claim 1 , which is arranged between the upper die and the lower die.

13. A coating shim for applying a first slurry and a second slurry to an object to be coated, the coating shim comprising:
a first flow channel for applying the first slurry to the object to be coated to form a first coating layer; and
a second flow channel for applying the second slurry to the object to be coated to form a second coating layer,
wherein the first flow channel comprises:
a side surface in the arrangement direction of the first flow channel and the second flow channel, the side surface of the first flow channel comprising a sloped portion and a step portion connected to the sloped portion; and
a first slurry outlet at a first end face of the shim facing the object to be coated, wherein the second flow channel comprises a second slurry outlet at the first end face,

wherein the sloped portion and the second slurry outlet are configured to partially overlap in a thickness direction of the coating shim, such that the first coating layer and the second coating layer partially overlap in the thickness direction of the coating shim.

14. The coating shim according to claim 13 , wherein the first slurry outlet is arranged apart from the second slurry outlet by a distance (h 1 ) in the thickness direction of the coating shim.

15. The coating shim according to claim 13 , wherein the coating shim has a thickness (h 3 ), and the first slurry outlet has a height equal to the thickness (h 3 ) in the thickness direction of the coating shim.

16. The coating shim according to claim 15 , wherein the second slurry outlet has a height (h 2 ) in the thickness direction of the coating shim, and the height (h 2 ) is 5%-95% of the thickness (h 3 ).

17. The coating shim according to claim 16 , wherein the step portion has a height (h 4 ) in the thickness direction of the shim, the height (h 4 ) is less than the height (h 2 ).

18. The coating shim according to claim 13 , wherein the first slurry outlet and the second slurry outlet have an overlapping width (w 2 ) of 0.1-9 mm in a length direction of the coating shim.

19. The coating shim according to claim 13 , wherein the first slurry outlet and the second slurry outlet have an overlapping width (w 2 ) not exceeding a width of the second slurry outlet in the length direction of the coating shim.

20. The coating shim according to claim 13 , wherein the sloped portion has a width (w 3 ) in the length direction of the coating shim, and the width (w 3 ) is not greater than 10 mm.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Che Huan
• Chen Wei
• Xu Baohua
• Li Shisong

Classifications

• B05C5/0254 Primary

  Coating heads with slot-shaped outlet (B05C5/0283 takes precedence) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• B05C9/06

  for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work · CPC title

• H01M4/04

  Processes of manufacture in general · CPC title

• H01M10/04

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title