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. 15, 2006
Filed:
Apr. 30, 2003
Kazuo Yamazaki, Kanagawa, JP;
Tsuyonobu Hatazawa, Tokyo, JP;
Takashi Tomita, Kanagawa, JP;
Tamon Ikeda, Tokyo, JP;
Ryuichi Nawa, Saitama, JP;
Yuuichi Ishikawa, Osaka, JP;
Masanori Hori, Osaka, JP;
Kazuo Yamazaki, Kanagawa, JP;
Tsuyonobu Hatazawa, Tokyo, JP;
Takashi Tomita, Kanagawa, JP;
Tamon Ikeda, Tokyo, JP;
Ryuichi Nawa, Saitama, JP;
Yuuichi Ishikawa, Osaka, JP;
Masanori Hori, Osaka, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention is relative to a battery capacity calculating method including a reference discharge curve calculating step of finding a discharge curve, operating as a reference, a corrected voltage calculating step of correcting a measured voltage Vof the battery with a component of an electrical resistance to find a corrected voltage V, and a capacity calculating step of finding the discharging capacity of the battery from the discharge curve, operating as a reference, using the corrected voltage V. The capacity calculating step includes a sub-step of calculating a capacity deterioration index S, as a ratio of capacity decrease caused by battery deterioration. The discharging capacity, calculated from the discharging capacity, operating as a reference, using the corrected voltage V, is further multiplied with the capacity deterioration index S to calculate the discharging capacity.