Protective monitoring circuit and battery pack
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United States of America Patent
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Jul 8, 2014
Grant Date -
Nov 29, 2012
app pub date -
Feb 15, 2011
filing date -
Feb 15, 2011
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
A protective monitoring circuit includes a protective circuit to detect at least one of overcharging, overdischarging, and overcurrent of a chargeable secondary battery to control whether to turn on or off a control transistor to protect the secondary battery, and a secondary-battery monitoring circuit, having a reduced size and having a breakdown voltage lower than a battery voltage of the secondary battery, to detect a status of the secondary battery, wherein the protective circuit generates a voltage that is commensurate with an output voltage of the secondary battery and that is within a predetermined tolerance voltage range of the secondary-battery monitoring circuit, and the secondary-battery monitoring circuit generates a detection value responsive to the generated voltage supplied from the protective circuit, the detection value being indicative of the output voltage of the secondary battery.
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