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:
Oct. 25, 2022
Filed:
Jun. 02, 2020
Honda Motor Co., Ltd., Tokyo, JP;
Pu Qian, Saitama, JP;
Hiroshi Sakai, Saitama, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
Abstract
Provided is a method for determining a micro short circuit of a lithium ion secondary battery which is capable of determining the presence or absence of a micro short circuit of the lithium ion secondary battery in a short time. A relaxation process after the interruption of a discharging current or a charging current is analyzed and a voltage fluctuation component due to micro short circuit is separated and used in the determination. Specifically, a method for determining a micro short circuit that determines presence or absence of the micro short circuit in a lithium ion secondary battery is provided which includes: a relaxation decomposition step of decomposing a change of a cell voltage in a relaxation process after interrupting charging current during charging or discharging current during discharging into a plurality of decomposition relaxation components; and a micro short circuit determination step of determining presence or absence of micro short circuit by determining presence or absence of a component in which a voltage drop has occurred due to the micro short circuit, among the plurality of decomposition relaxation components.