Method and apparatus for checking current sensor abnormality in battery pack

PURPOSE: A method and a device for diagnosing the abnormality of a current measuring unit are provided to determine the abnormality of the current measuring unit by diagnosing the abnormality of the current measuring unit through the voltage and current values of a battery pack even through the self-diagnosis function of the current measuring unit is trouble. CONSTITUTION: The voltage and current of a battery pack are periodically measured(S310). The amount of the changed voltage and current for a preset time is set based on the measured result(S320). The amount of the changed voltage and current for the preset time is compared with the reference value of the voltage and current(S330). The abnormality of the current measuring unit is diagnosed(S340). If the amount of the changed voltage is the reference value of the voltage and the amount of the changed current is the reference value of the current or more, it is determined that the current measuring unit is abnormal.