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:
Sep. 23, 2025
Filed:
Sep. 04, 2023
Prime Planet Energy & Solutions, Inc., Tokyo, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Primearth Ev Energy Co., Ltd., Shizuoka-ken, JP;
Hiroaki Ikeda, Toyota, JP;
Shusaku Goto, Hamamatsu, JP;
PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken, JP;
TOYOTA BATTERY CO., LTD., Shizuoka-ken, JP;
Abstract
A method for inspecting a battery in which an electrode body is accommodated in a case so that the electrode body is insulated from the case by an insulation film includes: adjusting the battery to a first voltage; measuring a first potential difference which is a potential difference between the case and a negative terminal that is exposed outside the case and electrically connected to a negative electrode plate to have a negative-electrode potential; measuring a second potential difference which is a potential difference between the case and the negative electrode plate after a lapse of a standby period of 24 hours or more; and determining whether or not a short circuit exists between the case and the negative electrode plate based on magnitude of the first and second potential differences and a change between the first potential difference and the second potential difference.