Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takahiro Yamashita0
Date of Patent
November 25, 2008
0Patent Application Number
109472430
Date Filed
September 23, 2004
0Patent Primary Examiner
Patent abstract
A battery charging apparatus having a plurality of charging units connected in series. A charging unit has a series switch connected in series with a rechargeable battery, and a parallel switch connected in parallel with the series connected rechargeable battery and series switch. A charging control section controls charging of a rechargeable battery by switching the series switch and parallel switch ON and OFF. The charging control section changes the duty factor for switching series switches and parallel switches ON and OFF, switches a charging unit between a charging mode and a cut-off mode at a prescribed duty factor, and controls rechargeable battery charging currents to charge a plurality of batteries.
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