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. 12, 2011
Filed:
Aug. 03, 2007
Battery control device, battery control method, power source control device and electronic apparatus
Hideo Fukuda, Kawasaki, JP;
Hideo Fukuda, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A battery control devicehas an electric circuit control unitcontrolling a power supply; a voltage measuring unitmeasuring a voltage; a current measuring unitmeasuring an electric current; and a power source control unit, wherein the power source control unitmeasures a first voltage defined as the voltage of the batteryand a first current defined as the current of the batteryin a state where the batterysupplies electric power to the load, measures a second voltage defined as the voltage of the batteryin a state where the supply of the electric power to the loadfrom the batteryis cut off, and calculates internal impedance of the batteryby dividing a value, obtained in a way that subtracts the first voltage from the second voltage, by the first current.