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:
Dec. 30, 1997
Filed:
Aug. 21, 1995
Youichi Arai, Shizuoka-ken, JP;
Brendan O'Toole, Co. Kerry, IE;
Tsutomu Saigo, Shizuoka-ken, JP;
Kenichi Shimoyama, Shizuoka-ken, JP;
Ryo Kumagai, Shizuoka-ken, JP;
Yoshihide Takada, Shizuoka-ken, JP;
Yazaki Corporation, Tokyo, JP;
Abstract
A voltage sensor detects a terminal voltage of a battery connected to a load and a current sensor detects a current flowing through the load. A voltage-current changing tendency calculation unit reads a detected voltage and a detected current detected by the voltage sensor and the current sensor and outputs, every predetermined period of time, plural data of the detected voltage and the corresponding detected current as dispersed data. A voltage-current approximating line calculation unit inputs the dispersed data and determines, based on the dispersed data, a voltage-current approximating linear function each time the predetermined period of time. A battery remaining capacity calculation unit determines, each time the voltage-current approximating linear function is determined, a remaining capacity of the battery based on the voltage-current approximating linear function. Particularly the voltage-current approximating line calculation unit determines the voltage-current approximating linear function by applying a method of least squares to the plural data of the voltage and the corresponding current of the dispersed data.