The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2022
Filed:
Apr. 01, 2020
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Sang Mok Park, Gwangju-si, KR;
Young Woo Lee, Suwon-si, KR;
Ik Kyu Kim, Gwangmyeong-si, KR;
Sung Ho Ban, Hwaseong-si, KR;
Yoon Ji Lee, Bucheon-si, KR;
Jung Young Cho, Seoul, KR;
HYUNDAI MOTOR COMPANY, Seoul, KR;
KIA MOTORS CORPORATION, Seoul, KR;
Abstract
A method for checking defects in a lithium ion secondary battery includes primarily charging and degassing the lithium ion secondary battery after manufacture of the secondary battery, secondarily charging and discharging the secondary battery and then measuring one or more of OCVs and IRs of lithium ion secondary battery cells; pressurizing and aging the secondary battery by aging the secondary battery in a state in which a pressure of a designated magnitude or more is applied to the secondary battery, and checking whether or not the secondary battery cells are defective by re-measuring the one or more of OCVs and IRs of the secondary battery cells and then comparing the re-measured one or more of the OCVs and the IRs to the previously measured one or more of the OCVs and the IRs.