Electricity: battery or capacitor charging or discharging – One cell or battery charges another – Vehicle battery charging
Reexamination Certificate
2011-01-11
2011-01-11
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
One cell or battery charges another
Vehicle battery charging
C320S103000, C320S128000, C320S140000
Reexamination Certificate
active
07868584
ABSTRACT:
A DC-DC converter includes an inductor, a capacitor, an output voltage detection circuit, and a synchronous rectification circuit including a rectifier-side synchronous rectifier element and a commutator-side synchronous rectifier element. The commutator-side synchronous rectifier element is turned on so as to pass a current through a closed loop composed of the commutator-side synchronous rectifier element, the inductor, and a second secondary battery. The characteristic evaluation of the second secondary battery is performed on the basis of the decrease in a detection voltage Vout of an output voltage Vo. As a result, it is possible to determine the effective capacity or characteristic degradation state of the second secondary battery with a circuit to charge the second secondary battery without using a dedicated circuit.
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Official Communication issued in International Patent Application No. PCT/JP2008/068732, mailed on Jan. 13, 2009.
Hara Takashi
Nishiyama Takayoshi
Ueki Koichi
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
Omar Ahmed
Tso Edward
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