| 摘要 |
A voltage monitor circuit, wherein a high voltage is not applied to a monitor circuit even if a series circuit of plural batteries connecting a battery pack is cut off, is provided. When a current breaking switch is turned off, a high series voltage with reversed polarity of plural batteries is generated across the current breaking switch. Subsequently, a solid state switch with a negative voltage is turned off. Further, as a wire on the side of a battery pack monitor circuit also has a negative voltage, another solid state switch biased by a voltage of the wire is turned off likewise. Consequently, a high voltage is not generated between the wires on the side of the battery pack monitor circuit even if the current breaking switch is turned off.
|
