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. 04, 2008
Filed:
Dec. 02, 2002
Yusai Murakami, Hamamatsu, JP;
Masahiro Takada, Hamana-gun, JP;
Teruyoshi Egoshi, Toyohashi, JP;
Norito Yamabe, Toyohashi, JP;
Yusai Murakami, Hamamatsu, JP;
Masahiro Takada, Hamana-gun, JP;
Teruyoshi Egoshi, Toyohashi, JP;
Norito Yamabe, Toyohashi, JP;
Panasonic EV Energy Co., Ltd., Shizuoka, JP;
Abstract
There is provided a battery pack system with estimation accuracy of a remaining capacity of a secondary batter enhanced. A current accumulation coefficient correction sectioncalculates a correction amount α with respect to a current accumulation coefficient k in accordance with a battery electromotive force Veq from an electromotive force calculation section. A remaining capacity calculation sectionestimates a remaining capacity SOC by current accumulation, based on the current accumulation coefficient k calculated from a correction amount α, and a charging efficiency η based on a currently estimated remaining capacity calculated by a charging efficiency calculation section