Charger and DC-DC converter

Details Charger and DC-DC converter Charger and DC-DC converter

2008-05-13

2008-05-13

Tso, Edward H (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

Reexamination Certificate

active

10579719

ABSTRACT:
A novel charger wherein a constant electric power control is made such that an electric power feed at the output end is the same as the electric power fed by a fuel cell at the input end, thereby keeping a cell charge current constant, reducing the number of components and further realizing a stable charging. A charger, an input source (Vfc) of which is a fuel cell or solar cell exhibiting a relatively large output impedance during electric power feed, includes a secondary cell (B) at the output end. A current control circuit (10), which is connected to the secondary cell, supplies a charging current to be caused to flow into the secondary cell. The value of the charging current is obtained from a control amount necessary for maintaining a converter output voltage at a drooping voltage as set.

REFERENCES:
patent: 3927361 (1975-12-01), Macharg
patent: 5736831 (1998-04-01), Harrington
patent: 2003/0155887 (2003-08-01), Bourilkov et al.
patent: 62-154121 (1987-07-01), None
patent: 03-235234 (1991-10-01), None
patent: 11-341699 (1999-12-01), None
PCT International Search Report mailed on Feb. 22, 2005.

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