APPARATUS AND METHOD FOR SENSING A CURRENT LEAKAGE OF A BATTERY, AND BATTERY DRIVING APPARATUS AND BATTERY PACK INCLUDING THE APPARATUS

An apparatus for sensing a leakage current of a battery includes a floating capacitor charged with a voltage detected from a cathode or anode terminal of a battery; a DC voltage applying unit for applying a DC voltage to the anode terminal when measuring a detection voltage of the anode terminal; a terminal selection switching unit for selecting a voltage detection path for the cathode or anode terminal; a charge switching unit for charging the floating capacitor with the detection voltage detected from the selected voltage detection path, and separating the floating capacitor from the voltage detection path; a voltage sensing unit for sensing the detection voltage charged to the floating capacitor; and a leakage current determining unit for calculating a leakage resistance based on the detection voltages, and comparing the leakage resistance with a criterion insulation resistance to determine whether a leakage current occurs.