Electrode drying device and electrode drying method

Patent metadata

Field	Value
Publication number	US-12209805-B2
Application number	US-202017797468-A
Country	US
Kind code	B2
Filing date	Nov 11, 2020
Priority date	Sep 10, 2020
Publication date	Jan 28, 2025
Grant date	Jan 28, 2025

Abstract

The present invention relates to an electrode drying apparatus and an electrode drying method, and the electrode drying apparatus includes: an oven configured to provide a space in which the electrode is dried and to include a hot air nozzle or an infrared heater; a color coordinate measuring unit configured to be positioned at an outlet of the oven and measure a color coordinate value of an electrode active material layer with respect to the dried electrode; and a controller configured to analyze a drying result of the electrode from the color coordinate value, determine whether the electrode is defective in drying, and control a drying condition of the electrode.

First claim

The invention claimed is:

1. An apparatus for drying an electrode, comprising:
an oven configured to provide a space in which the electrode is dried and to include a hot air nozzle or an infrared heater;
a color coordinate measuring unit configured to be positioned at an outlet of the oven and to measure a color coordinate value of an electrode active material layer of a dried electrode; and
a controller configured to analyze a drying result of the dried electrode from the color coordinate value, to determine whether the dried electrode is defective in drying, and to control a drying condition.

2. The apparatus of claim 1 , wherein the color coordinate value is L*.

3. The apparatus of claim 1 , wherein the color coordinate value is a gray value according to a gray scale.

4. The apparatus of claim 1 , wherein the color coordinate measuring unit includes a spectrophotometer or a colorimeter.

5. The apparatus of claim 1 , wherein the color coordinate measuring unit includes an image sensor capable of taking an image of a surface of the electrode active material layer.

6. The apparatus of claim 1 , wherein the controller is further configured to analyze a drying degree of the dried electrode or distribution of a binder in the dried electrode from the color coordinate value, and to determine whether there is a defect in drying.

7. The apparatus of claim 1 , further comprising: an outside air condition measuring unit configured to measure a temperature and humidity of outside air.

8. The apparatus of claim 1 , wherein the controller is further configured to reset a drying condition by reflecting an existing drying condition and a temperature and humidity of the outside air when determined that the dried electrode is defective in drying.

9. The apparatus of claim 8 , wherein the controller is further configured to reflect the reset drying condition and to change the drying condition in real time.

10. The apparatus of claim 8 , wherein the controller is further configured to automatically update the reset drying condition through machine learning.

Assignees

• Lg Energy Solution Ltd

Inventors

• Kim Kyoung Ho
• Lee Kyung Mee
• Yang Hyun Jin
• Lee Hyun Sup
• Park Won Chan
• Lee Myung Han
• Kim Ji Eun

Classifications

• H01M4/0471 Primary

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title

• G06T2207/10024

  Color image · CPC title

• G06T7/0004

  Industrial image inspection · CPC title

• G01N21/31

  Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry {(G01N21/72 takes precedence)} · CPC title