Charging device
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United States of America Patent
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Mar 10, 2015
Grant Date -
Jan 5, 2012
app pub date -
Mar 31, 2009
filing date -
Mar 31, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A charging device supplies charge current to a battery group having plural secondary batteries connected in series to perform charging. In the charging device, a discharge route circuit for discharging charge current to be supplied to the secondary battery when the battery voltage of the secondary battery exceeds a predetermined voltage while charging is provided to every secondary battery. Also provided is a cut-off circuit for cutting off the discharge route circuit from each secondary battery after charging is completed. Discharge at a discharge route circuit is suppressed and energy efficiency is increased.
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