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:
Aug. 20, 2019
Filed:
Aug. 18, 2015
Furukawa Electric Co., Ltd., Tokyo, JP;
Furukawa Automotive Systems Inc., Inukami-gun, JP;
Koichi Yokoyama, Tokyo, JP;
Etsuzo Sato, Shiga, JP;
FURUKAWA ELECTRIC CO., LTD., Tokyo, JP;
FURUKAWA AUTOMOTIVE SYSTEMS INC., Inukami-gun, JP;
Abstract
Provided are a secondary battery degradation determination method and a secondary battery degradation determination device which can detect degradation of a secondary battery in advance even before an engine starts. When it is determined in Step Sthat a vehicle is in a stop state, a stable-state open-circuit voltage OCV is measured in Step Sand internal resistance R1 is calculated in Steps Sand S. On the other hand, when it is determined in Step Sthat a starteris operated, a maximum discharge current value Inew is measured in Step Sand a maximum discharge current value Is is updated in Steps Sand S. In Step S, a minimum voltage Vs is calculated. In Step S, the stable-state open-circuit voltage OCV and the minimum voltage Vs are compared with predetermined threshold values to perform the degradation determination of a secondary battery