# US 10,500,605 B2 · Apparatus and method for coating electrode active material slurry

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- Number: US 10,500,605 B2
- Document ID: US10500605B2
- Status: Granted
- Kind: B2
- Application number: 15/556,533
- Filed: 2016-06-09
- Published: 2018-02-22
- Granted: 2019-12-10
- Earliest claimed: 2015-07-28
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Jin-Young Son; Taek-Soo Lee; Hyun-Won Lee; Ki-Won Sung; Do-Hwa Jung
- Web page: https://patentgrep.com/patent/US10500605B2

## CPC

- B05C 5/0254: {Coating heads with slot-shaped outlet (B05C5/0283 takes precedence)}
- B05C 9/06: 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
- B05D 1/26: performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
- H01M 4/04: Processes of manufacture in general
- H01M 4/0402: {Methods of deposition of the material}
- H01M 4/0404: {by coating on electrode collectors}
- H01M 10/0404: {Machines for assembling batteries}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H10P 95/00: Generic processes or apparatus for manufacture or treatments not covered by the other groups of this subclass
- B05D 5/12: to obtain a coating with specific electrical properties
- B05D 2202/00: Metallic substrate
- B05D 2252/02: of indefinite length
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- B05C: APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (spraying apparatus, atomising apparatus, nozzles B05B; plant for applying liquids or other fluent materials to objects by electrostatic spraying B05B5/08)
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

An apparatus for coating electrode active material slurry includes: a transfer unit continuously transferring an electrode current collector in a predetermined process direction; and a coating die which is reciprocally movable in the process direction or an opposite direction to the process direction and coats the active material slurry on a predetermined coating area of the electrode current collector transferred by the transfer unit, wherein the coating die stands by at a predetermined coating start position and, when a balcony region corresponding to a leading end of the coating area reaches the coating start position, coats the active material slurry on the balcony region while moving from the coating start position to a main coating position that is spaced apart from the coating start position by a predetermined distance in the opposite direction.

## Claims

### Claim 1

A method of coating electrode active material slurry such that the active material slurry is coated, by using a coating die, on a coating area of an electrode current collector continuously transferred in a predetermined process direction at a constant, predetermined moving speed, the method comprising:
(a) a coating start process in which, while the coating die stands by at a predetermined coating start position, when a balcony region of the coating area, on which coating of the active material slurry begins, reaches the coating start position and the electrode current collector is moving in the process direction at the moving speed, the coating die coats the active material slurry on the balcony region while moving from the coating start position to a main coating position that is spaced apart from the coating start position by a predetermined distance in an opposite direction to the process direction;
(b) a main coating process in which, when the coating die reaches the main coating position and the electrode current collector is moving in the process direction at the moving speed, the coating die coats the active material slurry on a main coating region of the coating area while stopped, the main coating region located between the balcony region and a drag region of the coating area, on which coating of the active material slurry is terminated; and
(c) a coating end process in which, when the drag region reaches the main coating position and the electrode current collector is moving in the process direction at the moving speed, the coating die coats the active material slurry on the drag region while moving from the main coating position to a coating end position that is spaced apart from the main coating position by a predetermined distance in the process direction.

### Claim 2 (depends on 1)

The method according to claim 1, wherein, in the operation (a), the coating die is moved in the opposite direction at a speed equal to a moving speed of the electrode current collector.

### Claim 3 (depends on 1)

The method according to claim 1, wherein, in the operation (c), the coating die is moved in the process direction at a speed equal to a moving speed of the electrode current collector.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the coating start position and the coating end position are a same position.

### Claim 5 (depends on 1)

The method according to claim 1, wherein, during the coating start process, the coating die coats the active material slurry on the balcony region while the electrode current collector moves at a first relative speed with respect to the coating die; during the main coating process, the coating die coats the active material slurry on the main coating region while the electrode current collector moves at a second relative speed with respect to the coating die; and, curing the coating end process, the coating die coats the active material slurry on the drag region while the electrode current collector moves at a third relative speed with respect to the coating die; and wherein the first relative speed is larger than the second relative speed, and the second relative speed is larger than the third relative speed.

### Claim 6

A method of coating electrode active material slurry such that the active material slurry is coated, by using a coating die, on a coating area of an electrode current collector continuously transferred in a predetermined process direction, the method comprising:
(a) a coating start process in which, while the coating die stands by at a predetermined coating start position, when a balcony region of the coating area, on which coating of the active material slurry begins, reaches the coating start position, the coating die coats the active material slurry on the balcony region while moving from the coating start position to a main coating position that is spaced apart from the coating start position by a predetermined distance in an opposite direction to the process direction, such that the coating die coats the active material slurry on the balcony region while the electrode current collector moves at a first relative speed with respect to the coating die; and
(b) a main coating process in which, when the coating die reaches the main coating position, the coating die coats the active material slurry on a main coating region of the coating area while stopped, such that the coating die coats the active material slurry on the main coating region while the electrode current collector moves at a second relative speed with respect to the coating die, wherein the main coating region is located between the balcony region and a drag region of the coating area, on which coating of the active material slurry is terminated;
wherein the first relative speed is larger than the second relative speed.

### Claim 7 (depends on 6)

The method according to claim 6, wherein, in the operation (a), the coating die is moved in the opposite direction at a speed equal to a moving speed of the electrode current collector.

### Claim 8

A method of coating electrode active material slurry such that the active material slurry is coated, by using a coating die, on a coating area of an electrode current collector continuously transferred in a predetermined process direction, the method comprising:
(a) a main coating process in which, when the coating die reaches the main coating position, the coating die coats the active material slurry on a main coating region of the coating area while stopped, such that the coating die coats the active material slurry on the main coating region while the electrode current collector moves at a first relative speed with respect to the coating die, wherein the main coating region is located between the balcony region and a drag region of the coating area, on which coating of the active material slurry is terminated; and
(b) a coating end process in which, when the drag region reaches the main coating position, the coating die coats the active material slurry on the drag region while moving from the main coating position to a coating end position that is spaced apart from the main coating position by a predetermined distance in the process direction, such that the coating die coats the active material slurry on the drag region while the electrode current collector moves at a second relative speed with respect to the coating die;
wherein the first relative speed is larger than the second relative speed.

### Claim 9 (depends on 8)

The method according to claim 8, wherein, in the operation (b), the coating die is moved in the process direction at a speed equal to a moving speed of the electrode current collector.