BATTERY DOD DIAGNOSING APPARATUS AND METHOD

A battery DOD diagnosing apparatus according to an embodiment of the present disclosure includes a measuring unit configured to measure a voltage of each of a plurality of battery cells in each of a plurality of cycles in which charging and discharging are performed, and output a plurality of voltage information for the plurality of measured voltages; and a control unit configured to receive the plurality of voltage information, calculate a voltage deviation of each cycle for each battery cell based on a reference voltage measured in an initial cycle of each of the plurality of battery cells, and diagnose a relative DOD of the plurality of battery cells based on a voltage sum value according to the plurality of voltage deviations calculated for each of the plurality of battery cells.