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:
Jul. 09, 2019
Filed:
Feb. 27, 2015
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Toru Omi, Hiroshima, JP;
Kenichi Miura, Osaka, JP;
Satoru Hiwa, Kanagawa, JP;
Takuma Iida, Kanagawa, JP;
Kazushige Kakutani, Kanagawa, JP;
Abstract
A battery state estimation device includes a detecting part, a state of charge (SOC) estimating part, an open circuit voltage (OCV) estimating part, a terminal voltage estimating part, and a correcting part. The detecting part detects a charge-discharge current and a terminal voltage of a battery. The SOC estimating part estimates an SOC of the battery, based on the charge-discharge current detected by the detecting part. The OCV estimating part estimates an OCV of the battery, based on the SOC estimated by the SOC estimating part and a relationship between an OCV and the SOC of the battery. The terminal voltage estimating part calculates an estimated terminal voltage, based on the charge-discharge current and the terminal voltage detected by the detecting part and on an equivalent circuit model constructed using an inversely proportional curve. The correcting part corrects the SOC estimated by the SOC estimating part, based on the estimated terminal voltage calculated by the terminal voltage estimating part and the terminal voltage detected by the detecting part.