Member for slot die coater, movable member for slot die coater, and slot die coater including the members to produce electrode

Patent metadata

Field	Value
Publication number	US-9539606-B2
Application number	US-201414528672-A
Country	US
Kind code	B2
Filing date	Oct 30, 2014
Priority date	Jul 16, 2013
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

Provided is a slot die coater that applies electrode slurry to metal foil to produce an electrode, the slot die coater including a die part, which includes a body having an inner space receiving the electrode slurry, a supply hole disposed in the body to supply the electrode slurry to the inner space, and a discharge hole disposed in the body to discharge the electrode slurry from the inner space to the metal foil, and a member for the slot die coater, which is removably installed in the inner space to form a slope surface in the inner space, or a movable member for the slot die coater, which selectively forms the slope surface.

First claim

What is claimed is:

1. A slot die coater that applies electrode slurry to metal foil to produce an electrode, the slot die coater comprising:
a die part, which includes a body having an inner space receiving the electrode slurry, a supply hole disposed in the body to supply the electrode slurry to the inner space, and a discharge hole disposed in the body to discharge the electrode slurry from the inner space to the metal foil; and a member for the slot die coater, which is removably installed in the inner space to form a slope surface in the inner space,
wherein the inner space has a first side surface provided with the discharge hole, a second side surface facing the first side surface, and a third side surface extending from the second side surface to the first side surface, and the slope surface is inclined from the second side surface to the third side surface,
wherein the member is a movable member for the slot die coater, which is removably installed in the inner space to selectively form a slope surface in the inner space,
wherein the movable member includes: a column member fixed to the body; and a back plate member, an end of which is rotatably coupled to the column member, and another end of which extends to the third side surface, and
wherein the back plate member rotates about the column member to form the slope surface.

2. The slot die coater of claim 1 , wherein the movable member guides the electrode slurry along the slope surface to the discharge hole to prevent the electrode slurry from stagnating at a corner between the second side surface and the third side surface.

3. The slot die coater of claim 1 , wherein the slope surface is provided in plurality to be disposed at the left and right sides of the supply hole, respectively.

4. The slot die coater of claim 1 , wherein the column member includes a head, a male column including a rod having a cylindrical shape having a width smaller than that of the head and extending from the head to the outside thereof, and a female column coupled to an end of the rod, and
a screw thread is formed in an outer circumferential surface of the end of the rod of the male column, and
the female column has a coupling hole, an inner surface of which is provided with a screw thread corresponding to the screw thread of the rod.

5. The slot die coater of claim 4 , wherein the back plate member includes one or more protrusion blocks extending from the first end of the black plate directed to the column member, and the protrusion block has a through hole through which the rod passes.

6. The slot die coater of claim 1 , wherein the back plate member is provided in plurality to be disposed at the left and right sides of the column member, respectively.

7. The slot die coater of claim 1 , wherein the movable member further includes a lateral plate member, an end of which is rotatably coupled to the second end of the back plate member, and another end of which extends to the discharge hole,
wherein when the lateral plate member moves along the third side surface to the discharge hole, the back plate member rotates about the column member to form the slope surface.

8. The slot die coater of claim 7 , wherein the lateral plate member includes: a rotation space formed in the first end of the lateral plate member and communicating with the outside thereof through two side surfaces of the lateral plate member; and a rotator rotatably inserted in the rotation space and having an insertion hole that passes through the lateral plate member from one of the side surfaces of the lateral plate member toward the other side surface to receive the second end of the back plate member.

9. The slot die coater of claim 7 , wherein the movable member further includes a handle member, an end of which is connected to the first end of the lateral plate member, and another end of which extends up to the outside of the die part toward the second side surface,
wherein the handle member adjusts a degree of moving the lateral plate member to the discharge hole according to a degree of inserting the handle member from the outside of the die part to the inside thereof.

10. The slot die coater of claim 1 , wherein when the inner space is cut along planes perpendicular to a width direction of the discharge hole, cross sections are formed between the slope surface and the first side surface, and a ratio of the area of the cross section corresponding to the perpendicular plane closest to the third side surface to the area of the cross section corresponding to the perpendicular plane closest to the central part of the inner space ranges from 23.0% to 53.7%.

11. The slot die coater of claim 1 , wherein the slope surface forms an angle ranging from 2.8 degrees to 16.7 degrees with the second side surface.

Assignees

• Lg Chemical Ltd

Inventors

• Park Sung Hyun
• Lee Chae Gyu
• Im Ye Hoon

Classifications

• H01M4/0402

  Methods of deposition of the material · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M4/139

  Processes of manufacture · CPC title

• H01M4/0409

  by a doctor blade method, slip-casting or roller coating · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title