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:
Feb. 06, 2007
Filed:
Feb. 25, 2004
Takuya Kinoshita, Hitachi, JP;
Hideki Miyazaki, Hitachi, JP;
Akihiko Emori, Hitachi, JP;
Tetsuro Okoshi, Fukaya, JP;
Tokiyoshi Hirasawa, Hiki, JP;
Takuya Kinoshita, Hitachi, JP;
Hideki Miyazaki, Hitachi, JP;
Akihiko Emori, Hitachi, JP;
Tetsuro Okoshi, Fukaya, JP;
Tokiyoshi Hirasawa, Hiki, JP;
Hitachi, Ltd., Tokyo, JP;
Shin-Kobe Electric Machinery Co., Ltd., Tokyo, JP;
Abstract
A battery performance monitoring system anticipates the sudden fall of battery output. The system measures the battery voltage at a time point when the discharge current of a battery becomes smaller than the reference current value or at a time point when the current to the load which is connected to the battery becomes smaller than the reference current value, and judges the battery to be abnormal if the difference of the measured battery voltage from the approximate formula in regard to the current-voltage relation in the former half of a same discharge event becomes out of the reference range.