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:
Apr. 01, 2025
Filed:
Nov. 30, 2022
Primearth Ev Energy Co., Ltd., Kosai, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Prime Planet Energy & Solutions, Inc., Tokyo, JP;
Shusaku Goto, Hamamatsu, JP;
Hiroaki Ikeda, Tokyo, JP;
TOYOTA BATTERY CO., LTD., Kosai, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo, JP;
Abstract
An inspecting step includes a first period after a cooling step ends and a second period after the first period ends. Variations in a voltage drop value per unit time in a nonaqueous electrolyte rechargeable battery are smaller in the second period than in the first period. The cooling step cools the battery in a state where the electrode body is directly or indirectly pressurized and restrained in a thickness direction with a smaller pressure than that in the inspecting step or in a state where the electrode body is not restrained. The voltage value of the battery is measured when a specified time has passed after the voltage value of the battery was measured in the second period. The battery is determined as being normal when the voltage drop value per unit time based on the measured voltage value is less than or equal to a threshold value.