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:
Apr. 06, 2010
Filed:
Sep. 20, 2007
Masafumi Okumura, Kawasaki, JP;
Hideo Fukuda, Kawasaki, JP;
Masafumi Okumura, Kawasaki, JP;
Hideo Fukuda, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A battery control device includes a unit to measure a voltage of a battery, a unit to measure an electric current of the battery, and a control unit to calculate an open-circuit voltage of the battery based on the voltage and the electric current of the battery, and to calculate a battery residual quantity ratio of the battery by use of relative information and the calculated open-circuit voltage, wherein the control unit calculates a charge quantity ratio of the battery by subtracting a battery residual quantity ratio at charge ending time from a battery residual quantity ratio at charge starting time, calculates a value obtained by multiplying the charge quantity ratio by a correction coefficient as a charging-discharging count of the battery, and integrates the charging-discharging count each time the charging-discharging count is calculated.