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. 25, 2015
Filed:
Mar. 20, 2013
Etsuzo Sato, Shiga, JP;
Hideaki Ishihara, Shiga, JP;
Fukuda Kazumi, Tokyo, JP;
Naoki Ishiyone, Tokyo, JP;
Etsuzo Sato, Shiga, JP;
Hideaki Ishihara, Shiga, JP;
Fukuda Kazumi, Tokyo, JP;
Naoki Ishiyone, Tokyo, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
FURUKAWA ELECTRIC CO., LTD., Tokyo, JP;
FURUKAWA AUTOMOTIVE SYSTEMS INC., Shiga, JP;
Abstract
A current detecting unit (current sensor) detecting a current value of a current flowing in a secondary battery; an extreme value detecting unit (CPU) detecting a first extreme value of a current after an inrush current flows from the secondary battery to a starter motor after electricity to the starter motor is turned on based on the current value; an inflection point detecting unit (CPU) detecting a first inflection point of the current after the inrush current flows based on a variation of the current value per a predetermined time; and a calculation unit (CPU) selecting the inflection point when timings when the extreme value and the inflection point are detected are separated for a predetermined time or more, and selecting either one of the extreme value or the inflection point in the other cases to set as a starting current, and calculating a starting voltage from the starting current, an internal resistance of the secondary battery, and a voltage before starting being a voltage of the secondary battery before the electricity to the starter motor is turned on, are included.