Battery pack current monitoring
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United States of America Patent
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Oct 2, 2012
Grant Date -
Sep 7, 2006
app pub date -
Sep 26, 2005
filing date -
Mar 7, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A battery pack may include at least one battery cell, a switch having an ON resistance dependent on a temperature of the switch, a thermistor having a resistance varying with changes in the temperature, and battery state monitoring circuitry. The battery state monitoring circuitry may be configured to monitor a voltage drop across the switch caused by a current flowing through the switch and the resistance of the thermistor to correlate the voltage drop to the current level. A cordless electrical device including the battery pack, and an associated method are also provided.
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