Solar-powered battery charger circuit

Details Solar-powered battery charger circuit Solar-powered battery charger circuit

2005-10-17

2009-06-23

Ullah, Akm E (Department: 2838)

Electricity: battery or capacitor charging or discharging

Cell or battery charger structure

Charger inductively coupled to cell or battery

C320S101000

Reexamination Certificate

active

07550944

ABSTRACT:
An interface circuit charges a rechargeable battery from a power source. A normally-closed relay with normally-closed switch contacts and a coil having a first end and a second end has its normally-closed switch contacts and the coil coupled in series between first and second input terminals. An EMF conduction diode is coupled between a fourth output terminal and a junction between the normally-closed switch contacts and the first end of the coil. The second end of the coil is coupled to a third output terminal. Current supplied from the power source energizes the coil and causes the normally-closed switch contacts to oscillate between an open condition and a closed condition. Energy transferred from the power source to an electromagnetic field of the coil when the normally-closed switch contacts are in the closed condition is transferred by discharging the electromagnetic field in response to current through the EMF conduction diode when the normally-closed switch contacts are in the open condition.

REFERENCES:
patent: 3840796 (1974-10-01), Tozaki
patent: 4274044 (1981-06-01), Barre
patent: 4626764 (1986-12-01), Weinhardt
patent: 5276393 (1994-01-01), Gali
patent: 5631534 (1997-05-01), Lewis
patent: 5717562 (1998-02-01), Antone et al.
patent: 5736833 (1998-04-01), Farris
patent: 5907238 (1999-05-01), Owerko et al.
patent: 2005/0134212 (2005-06-01), Chuang
patent: 2318466 (1998-04-01), None

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