Coating system and coating method for battery

Patent metadata

Field	Value
Publication number	US-12074306-B2
Application number	US-202117370214-A
Country	US
Kind code	B2
Filing date	Jul 8, 2021
Priority date	Nov 17, 2020
Publication date	Aug 27, 2024
Grant date	Aug 27, 2024

Abstract

An embodiment coating system for a secondary battery includes a supply tank connected to a slot-die and configured to store a slurry, an in-line viscometer configured to measure viscosity and temperature of the slurry, a flow meter configured to measure a flow rate of the slurry, a flow rate adjustment valve configured to adjust the flow rate according to a feedback signal based on the measured flow rate, a coating bead sensor configured to detect in real time a slurry coating bead shape discharged from the slot-die to a base material, and a coating controller configured to detect a process condition change event by monitoring a slurry property and the slurry coating bead shape in real time and to control the flow rate of the flow rate adjustment valve based on reference data corresponding to a changed slurry property.

First claim

What is claimed is:

1. A coating system for a battery, the coating system comprising:
a supply tank connected to a slot-die and configured to store a slurry;
an in-line viscometer configured to measure viscosity and temperature of the slurry;
a flow meter configured to measure a flow rate of the slurry;
a flow rate adjustment valve configured to adjust the flow rate according to a feedback signal based on the flow rate measured by the flow meter;
a coating bead sensor configured to detect a slurry coating bead shape of a coating bead at a time at which the coating bead is discharged from the slot-die to a base material;
a coating controller configured to detect a process condition change event by monitoring a slurry property and the slurry coating bead shape in real time and to control the flow rate of the flow rate adjustment valve based on reference data corresponding to a changed slurry property;
a pulseless pump configured to generate a pressure in piping of the coating system;
a 3-way valve configured to convert a flow direction of the slurry from a main line from the pulseless pump to a supply line toward the slot-die or to a circulation line toward the supply tank;
a solenoid valve configured to open or close the circulation line; and
at least one pressure sensor installed in the piping and configured to measure slurry pressure,
wherein the coating controller is configured to control the piping according to a circulation mode during a standby for a coating operation, a supply mode during the coating operation, and a shut-off mode after finishing the coating operation, and
wherein, in an initial stage of the coating operation, the coating controller is configured to control the piping to the shut-off mode to increase the slurry pressure in the main line to a level higher than a basic slurry supply pressure of the pulseless pump.

2. The coating system of claim 1 , wherein, in the circulation mode, the coating controller is configured to control the flow rate adjustment valve to be open, control the 3-way valve to be open with respect to the circulation line and closed with respect to the supply line, and control the solenoid valve to be open.

3. The coating system of claim 1 , wherein, in the supply mode, the coating controller is configured to control the flow rate adjustment valve to be open, control the 3-way valve to be open with respect to the supply line and closed with respect to the circulation line, and control the solenoid valve to be closed.

4. The coating system of claim 1 , wherein, in the shut-off mode, the coating controller is configured to control the flow rate adjustment valve to be open, control the 3-way valve to be open with respect to the circulation line and closed with respect to the supply line, and control the solenoid valve to be closed.

5. The coating system of claim 1 , wherein the flow rate adjustment valve is configured to adjust the flow rate to a same pressure in the circulation mode and the supply mode.

6. The coating system of claim 1 , wherein the flow rate adjustment valve is configured to adjust the flow rate to match the reference data according to a feedback signal applied by the coating controller based on a volume and mass of the slurry measured by the flow meter.

7. The coating system of claim 1 , wherein the coating bead sensor comprises at least one of a vision sensor, a laser, an ultrasonic wave, or a photodiode configured to detect the slurry coating bead shape.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Kang Dongjoon
• Cho Hyoup Je
• Min Seungjun
• Jeong Sunghoon

Classifications

• B05C11/1026

  Valves (in general F16K; B05C5/0225 takes precedence) · CPC title

• B05C11/1013

  responsive to flow or pressure of liquid or other fluent material (B05C11/101 takes precedence; control of flow in general G05D7/00; control of fluid pressure in general G05D16/00) · CPC title

• B05C11/1007

  responsive to condition of liquid or other fluent material (B05C11/1005 takes precedence) · CPC title

• B05C5/0254

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

• Y02E60/10

  Energy storage using batteries · CPC title