# US 12,594,569 B2 · Material removal device and method for battery electrode plate

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,594,569 B2
- Document ID: US12594569B2
- Status: Granted
- Kind: B2
- Application number: 18/541,338
- Filed: 2023-12-15
- Published: 2024-04-04
- Granted: 2026-04-07
- Earliest claimed: 2021-07-01
- Assignees: BYD Company Limited
- Applicants: BYD Company Limited
- Inventors: Hao Wei; Zhike Yang; Beijun Zhong
- Web page: https://patentgrep.com/patent/US12594569B2

## CPC

- B05B 13/02: Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work (B05B13/06 takes precedence)
- B05B 14/30: comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed
- B05C 5/02: {the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g.} from an outlet device in contact or almost in contact, with the work
- H01M 4/04: Processes of manufacture in general
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/139: Processes of manufacture
- H01M 10/058: Construction or manufacture
- H01M 50/531: Electrode connections inside a battery casing
- H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- Y02E 60/10: Energy storage using batteries
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)
- 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)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A device for removing a coating material from a battery electrode plate is provided. The battery electrode plate includes a current collector and a coating material attached to a surface of the current collector. The device includes a housing, a spraying port, and a suction port. The housing includes a side plate. A hollow space is defined by the side plate. The side plate is configured to be in contact with the current collector to isolate a portion of the coating material in the hollow space. The spraying port is located in the hollow space, and configured to be in communication with a liquid source to spray a liquid onto the portion of the coating material to dissolve the coating material. The suction port is located in the hollow space and configured to be in communication with a vacuum generation device to suck the dissolved coating material away from the current collector.

## Claims

### Claim 1

A device for removing a coating material from a battery electrode plate, the battery electrode plate comprising a current collector and the coating material attached to a surface of the current collector, the device comprising:
a housing, comprising a side plate, a hollow space being defined by the side plate, the side plate being configured to be in contact with the current collector and to isolate a portion of the coating material in the hollow space;
a spraying port, located in the hollow space and configured to be in communication with a liquid source to spray a liquid onto the portion of the coating material to dissolve the portion of the coating material; and
a suction port, located in the hollow space and configured to be in communication with a vacuum generation device to suck the dissolved coating material away from the current collector, wherein
the side plate comprises an inner side plate and an outer side plate, the inner side plate and the outer side plate are spaced apart to form a suction pipe, the suction pipe is in communication with the suction port, and one end of the outer side plate close to the battery electrode plate is configured to be in contact with the current collector.

### Claim 2 (depends on 1)

The device according to claim 1, wherein the housing further comprises a top plate, the side plate is disposed at a periphery of the top plate, and the side plate is configured to be in contact with the current collector to seal the hollow space.

### Claim 3 (depends on 2)

The device according to claim 2, wherein the top plate comprises an inner top plate and an outer top plate, the inner side plate is connected to the inner top plate to form an inner wall of the suction pipe, the outer side plate is connected to the outer top plate to form an outer wall of the suction pipe, the inner wall of the suction pipe and the outer wall of the suction pipe form the suction pipe, the suction pipe is in communication with the suction port, and the one end of the outer side plate close to the battery electrode plate is configured to be in contact with the current collector to seal the hollow space.

### Claim 4 (depends on 2)

The device according to claim 2, wherein a main spraying pipe is disposed in the top plate, the spraying port is formed on one side of the top plate close to the battery electrode plate, and the spraying port is in communication with the liquid source through the main spraying pipe to spray the liquid on the portion of the coating material.

### Claim 5 (depends on 4)

The device according to claim 4, further comprising a spraying plate, the spraying plate being disposed in the hollow space, a plurality of spraying pipes in communication with the main spraying pipe being disposed in the spraying plate, and the spraying port being formed on one end of each of the spraying pipes away from the main spraying pipe.

### Claim 6 (depends on 1)

The device according to claim 1, wherein the suction port has a suction port surface enclosing a channel in communication with the hollow space, and the suction port surface is at least partially of a bell shape having an opening facing the hollow space.

### Claim 7 (depends on 1)

The device according to claim 1, wherein one end of the suction pipe close to the battery electrode plate forms the suction port.

### Claim 8 (depends on 1)

The device according to claim 1, wherein one end of the inner side plate close to the battery electrode plate is configured to be in contact with the portion of the coating material and is spaced apart from the current collector to form the suction port.

### Claim 9 (depends on 8)

The device according to claim 8, wherein a first distance between a first portion of the suction port away from the inner side plate and the current collector is greater than a second distance between a second portion of the suction port close to the inner side plate and the current collector.

### Claim 10 (depends on 1)

The device according to claim 1, wherein one end of the inner side plate close to the battery electrode plate is configured to be in contact with the portion of the coating material away from the current collector.

### Claim 11

A method for removing a coating material from a battery electrode plate by a device, the battery electrode plate comprising a current collector and the coating material attached to a surface of the current collector, wherein
the device comprises:
a housing, comprising a side plate, a hollow space being defined by the side plate, the side plate being configured to be in contact with the current collector;
a spraying port, located in the hollow space and configured to be in communication with a liquid source; and
a suction port, located in the hollow space and configured to be in communication with a vacuum generation device, wherein
the side plate comprises an inner side plate and an outer side plate, the inner side plate and the outer side plate are spaced apart to form a suction pipe, the suction pipe is in communication with the suction port, and one end of the outer side plate close to the battery electrode plate is configured to be in contact with the current collector; and
the method comprises:
placing the housing on the battery electrode plate, isolating a portion of the coating material in the hollow space by the side plate;
spraying a liquid through the spraying port in the hollow space onto the portion of the coating material to dissolve the portion of the coating material; and
sucking the dissolved coating material away from the current collector through the suction port.

### Claim 12 (depends on 11)

The method according to claim 11, wherein after the sucking the dissolved coating material away from the current collector through the suction port, the method further comprises:
spraying the liquid on the current collector from which the dissolved coating material is sucked away, and sucking the liquid away from the current collector through the suction port.

### Claim 13 (depends on 12)

The method to claim 12, wherein after the spraying the liquid on the current collector from which the dissolved coating material is sucked away, and sucking the liquid away from the current collector through the suction port, the method further comprises:
drying the battery electrode plate.

### Claim 14 (depends on 11)

The method according to claim 11, wherein the spraying the liquid through the spraying port in the hollow space onto the portion of the coating material to dissolve the coating material comprises spraying 1 g to 3 g of the liquid per square centimeter on the coating material.

### Claim 15 (depends on 11)

The method according to claim 11, wherein a pressure in the hollow space is about 50 KPa to about 300 KPa.

### Claim 16 (depends on 11)

The method according to claim 11, wherein the housing further comprises a top plate, the side plate is disposed at a periphery of the top plate, and the side plate is configured to be in contact with the current collector to seal the hollow space.

### Claim 17 (depends on 16)

The method according to claim 16, wherein the top plate comprises an inner top plate and an outer top plate, the inner side plate is connected to the inner top plate to form an inner wall of the suction pipe, the outer side plate is connected to the outer top plate to form an outer wall of the suction pipe, the inner wall of the suction pipe and the outer wall of the suction pipe form the suction pipe, the suction pipe is in communication with the suction port, and the one end of the outer side plate close to the battery electrode plate is configured to be in contact with the current collector to seal the hollow space.

### Claim 18 (depends on 11)

The method according to claim 11, wherein the suction port has a suction port surface enclosing a channel in communication with the hollow space, and the suction port surface is at least partially of a bell shape having an opening facing the hollow space.