Multi mode cordless battery charger
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United States of America Patent
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Jan 25, 1994
Grant Date -
N/A
app pub date -
Sep 29, 1992
filing date -
Sep 29, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A self contained battery charger is disclosed for use in charging an external battery through a pair of connecting cables. The battery charger comprises an internal battery for providing a first predetermined battery voltage and a DC to DC converter, connected to the internal battery, for converting the first predetermined voltage to a low current signal. First switching circuitry is provided for communicating a low current signal to the external battery. Status monitoring circuitry is provided for monitoring voltage and/or current conditions when said low current signal is communicated to the external battery. Second switching circuitry is provided for communicating a high current signal to the external battery in response to sensed voltage and/or current conditions.
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