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:
Mar. 28, 2023
Filed:
Aug. 12, 2019
Nissan Motor Co., Ltd., Yokohama, JP;
Renault S.a.s., Boulogne-Billancourt, FR;
Nissan Motor Co., Ltd., Yokohama, JP;
Renault S.A.S., Boulogne-Billancourt, FR;
Abstract
A short-circuit prediction device for predicting the presence or absence of occurrence of an internal short circuit in a secondary battery is provided. The secondary battery has a positive electrode, a solid electrolyte, and a negative electrode that contains a lithium alloy. The short-circuit prediction device includes a measurement instrument that measures AC impedance of the secondary battery and a controller that predicts the internal short circuit in the secondary battery. The measurement instrument calculates electrolyte resistance of the secondary battery and reaction resistance of the secondary battery from the AC impedance. When a change rate of the electrolyte resistance per a predetermined period is within a predetermined range and the reaction resistance becomes higher than a predetermined upper limit, the controller predicts that there is a possibility of occurrence of the internal short circuit.