	US 12,352,703 B2
	Electrode quality evaluation method and electrode manufacturing method
Hyun Sup Lee, Daejeon (KR); Hyun Jin Yang, Daejeon (KR); Kyun Il Rah, Daejeon (KR); Kyoung Ho Kim, Daejeon (KR); Myung Han Lee, Daejeon (KR); Kyung Mee Lee, Daejeon (KR); and Won Seok Cho, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/916,932
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Apr. 1, 2021, PCT No. PCT/KR2021/004070 § 371(c)(1), (2) Date Oct. 4, 2022, PCT Pub. No. WO2021/210818, PCT Pub. Date Oct. 21, 2021.
Claims priority of application No. 10-2020-0044899 (KR), filed on Apr. 13, 2020; and application No. 10-2020-0119927 (KR), filed on Sep. 17, 2020.
Prior Publication US 2023/0152214 A1, May 18, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 21/95 (2006.01); G01N 21/25 (2006.01); H01M 4/04 (2006.01)

CPC G01N 21/95 (2013.01) [G01N 21/251 (2013.01); H01M 4/0404 (2013.01); H01M 4/0435 (2013.01)]

13 Claims

1. A method of evaluating quality of an electrode comprising a current collector and an active material and not being rolled, comprising:

measuring a color coordinate value of the active material layer using an optical instrument; and

evaluating the quality of the electrode as a good product when the color coordinate value satisfies a predetermined electrode quality evaluation criterion and as defective when the color coordinate value does not satisfy the predetermined electrode quality evaluation criterion.