POWER SOURCE DEVICE, ELECTRIC VEHICLE MOUNTED WITH THE POWER SOURCE DEVICE, AND CONTROL METHOD FOR POWER SOURCE DEVICE

摘要

An ECU (60) determines, based on a voltage (V) from an insulation resistance reduction detector (50), whether there is deterioration in the insulation resistance of a power source device (100). The ECU (60) sets a determination threshold for determining deterioration of insulation resistance to a first value when a load (80) outside the vehicle is not connected to the power source device (100), and when the load (80) outside the vehicle is connected to the power source device (100), sets the determination threshold to a second value lower than the first value in consideration of an increase in a capacitance component by capacitors (C3, C4) of a Y capacitor (84).