Battery charge control circuit
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United States of America Patent
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Feb 20, 1996
Grant Date -
N/A
app pub date -
Sep 15, 1993
filing date -
Sep 17, 1992
priority date (Note) -
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Abstract
Circuit groups for preventing a battery from being deteriorated in efficiency due to a charging and discharging of each of secondary batteries is incorporated in a battery protection circuit for protecting a plurality of batteries connected in series to thereby extend a life of the battery. The battery protection circuit incorporates therein power down means for extending a time in which a voltage of a remaining capacity becomes 0V as much as possible by causing a current to flow only in the minimum circuit when the battery is overdischarged. Also, when a trouble such as a momentary overcurrent or the like is detected, the circuit can be prevented from set in the power down mode.
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