Patent ID: 8831816

Claim:
An electrical leakage diagnosis apparatus for a vehicle, comprising: a plurality of insulation resistors arranged between a chassis of the vehicle and one or more driving components or electrical field loads; an insulation resistance sensor configured to measure insulation resistances from the plurality of insulation resistors and output the measured insulation resistances; a main switching part configured to selectively supply electrical power from a high voltage battery to the one or more driving components or electrical field loads; and a battery power management part configured to terminate operation of the one or more driving components to control a driving motor of the vehicle when the value of a first insulation resistance output from the insulation resistance sensor is less than a previously set threshold value, and to determine that an insulation breakage has occurred in the one or more driving components when the value of a second insulation resistance, measured after the one or more driving components has been terminated, exceeds a threshold value and to terminate the operation of the vehicle by turning off the main switching part so that electrical power supplied from the high voltage battery to the electrical field loads of the vehicle is disconnected, wherein the first and second insulation resistances are values measured between the high voltage battery and the chassis, and the battery power management part is configured to terminate sequentially any one of a plurality of high voltage elements except for the one or more driving components in the electrical field loads when the value of the second insulation resistance is less than the threshold value.