The power control apparatus

Power control device, power storage device having a plurality of cells connected in parallel are constituted, for each detected voltage of the battery voltage detection unit and the electric loads mounted on the vehicle power control device, comprising: said power storage device connection, when driving the load to be driven by the power supplied from said power storage device, based on the voltage of the voltage detecting unit by the detected voltage deviation calculating a voltage deviation between the plurality of battery calculating section; by the voltage deviation calculation unit calculates a deviation of the voltage with a predetermined first threshold value comparing unit; the comparison result of the voltage comparing section deviation less than the first threshold value the presence or absence of the disconnection detection section detects becomes the off state of said power storage device in the battery.