Slot die for manufacturing rechargeable battery electrode

Patent metadata

Field	Value
Publication number	US-11779953-B2
Application number	US-202016952354-A
Country	US
Kind code	B2
Filing date	Nov 19, 2020
Priority date	Nov 20, 2019
Publication date	Oct 10, 2023
Grant date	Oct 10, 2023

Abstract

A slot die for manufacturing a rechargeable battery electrode includes a first block with a chamber to accommodate an active material slurry, a second block facing and attached to the first block, a shim between the first and second blocks and including facing end portions, and a slot between the first and second blocks, and between the facing end portions, the slot including a first side defined by the first block, and a second side defined by the second block and facing the first side. Each of the end portions of the shim includes a width adjuster protruding to a second reference point from a first reference point in a width direction by a first adjusting width, extending to a third reference point from the second reference point at a first angle with respect to a discharging direction, and having a first adjusting length in the discharging direction.

First claim

What is claimed is:

1. A slot die for manufacturing a rechargeable battery electrode, the slot die comprising:
a first block including a chamber to accommodate an active material slurry;
a second block facing the first block, the first block and the second block being attached to each other;
a shim member positioned between the first block and the second block, the shim member including end portions facing each other; and
a slot between the first and second blocks, and between the facing end portions of the shim member, the slot to discharge the active material slurry through a front end thereof, and the slot including:
a first side defined by the first block, the first side extending in a width direction and a discharging direction of the slot, and
a second side defined by the second block, the second side facing the first side and extending in the width direction and the discharging direction of the slot,

wherein each of the end portions of the shim member includes a width adjuster with a first triangular planar shape, as viewed in a top view, the first triangular planar shape of one of the end portions protruding toward the first triangular planar shape of another one of the end portions,
wherein a distance between the end portions of the shim member along the width direction increases toward the front end of the slot, and
wherein the first triangular planar shape includes:
a first adjuster side having a first adjusting width in the width direction, the first adjuster side being opposite the front end of the slot,
a second adjuster side extending from the first adjuster side toward the front end of the slot along an imaginary line in the discharging direction, the second adjuster side having a first adjusting length, and
a first angle with respect to the discharging direction.

2. The slot die as claimed in claim 1 , wherein a width ratio of the first adjusting width to a width of the slot in the width direction is greater than 0 and equal to or less than 0.1.

3. The slot die as claimed in claim 2 , wherein the width ratio of the first adjusting width to the width of the slot is equal to or greater than 0.02 and equal to or less than 0.06.

4. The slot die as claimed in claim 1 , wherein a length ratio of the first adjusting length to a length of the slot in the discharging direction is greater than 0 and equal to or less than 0.5.

5. The slot die as claimed in claim 1 , wherein the first angle is greater than 0° and equal to or less than 30°.

6. The slot die as claimed in claim 1 , wherein each of the end portions of the shim member includes:
a linear part adjacent to the front end of the slot, and
the width adjuster with the first triangular planar shape, the first triangular planar shape protruding into the slot beyond the linear part, as viewed in a top view, and the linear part being between the first triangular planar shape and the front end of the slot in the discharging direction.

7. The slot die as claimed in claim 1 , wherein each of the end portions of the shim member further includes an additional width adjuster having a second triangular planar shape connected to the first triangular planar shape in the discharging direction, the second triangular planar shape including:
a third adjuster side having a second adjusting width in the width direction and parallel to the first adjuster side of the first triangular planar shape, the third adjuster side being at the front end of the slot,
a fourth adjuster side having a second adjusting length in the discharging direction, the fourth adjuster side extending from the third adjuster side along an imaginary line toward the first triangular planar shape, and
a second angle with respect to the discharging direction, the second angle being different from the first angle.

8. The slot die as claimed in claim 7 , wherein the distance between the end portions of the shim member along the width direction is greater at a center of the slot than at the front end thereof.

9. The slot die as claimed in claim 7 , wherein the second angle is greater than 0° and equal to or less than 15°.

10. The slot die as claimed in claim 7 , wherein the additional width adjuster further includes a convex round portion further connected to the second triangular planar shape in the discharging direction, the convex round portion being round at an end of the discharging direction and increasing the width of the slot in the discharging direction.

11. The slot die as claimed in claim 1 , wherein each of the end portions of the shim member further includes an additional width adjuster connected to the width adjuster in the discharging direction, the additional width adjuster additionally increasing the width of the slot in the discharging direction.

12. The slot die as claimed in claim 11 , wherein the additional width adjuster further includes a concave round portion, the concave round portion being round at an end of the discharging direction, and reducing the width of the slot in the discharging direction.

13. The slot die as claimed in claim 1 , wherein each of the end portions of the shim member further includes an inclined surface facing the slot and adjacent to the width adjuster in the discharging direction, the inclined surface being inclined at a third angle with respect to the discharging direction, as viewed in a top view.

14. The slot die as claimed in claim 13 , wherein the third angle is greater than 0° and equal to or less than 25°.

15. The slot die as claimed in claim 1 , wherein the width adjuster has a cross-section of a straight line in a height direction so as to be vertically connected to the first side and the second side of the slot.

16. The slot die as claimed in claim 1 , wherein the width adjuster has a cross-section that is curved toward the slot so as to be connected to the first side and the second side of the slot in a round way.

Assignees

• Samsung Sdi Co Ltd
• Univ Korea Res & Bus Found

Inventors

• Ahn Won-Gi
• Kim Yongho
• Park Jin Seok
• Bae Juhye
• Eom Hyeri
• Jeong Min-Young
• Jung Hyun Wook

Classifications

• B05C5/0262 Primary

  adjustable in width, i.e. having lips movable relative to each other in order to modify the slot width, e.g. to close it · CPC title

• B05D1/36

  Successively applying liquids or other fluent materials, e.g. without intermediate treatment · CPC title

• B29C48/305 Primary

  having a wide opening, e.g. for forming sheets · CPC title

• H01M4/0402

  Methods of deposition of the material · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title