APPARATUS AND METHOD FOR DIAGNOSING ABNORMAL DEGRADATION OF BATTERY CELL

The present disclosure relates to an apparatus and method for diagnosing abnormal deterioration of a battery cell, and provides a battery cell abnormal deterioration diagnosis apparatus including an SOC calculation unit configured to calculate a state of charge (SOC) of a plurality of battery cells, a change amount calculation unit configured to calculate, for each of the plurality of battery cells, an SOC change amount average that is a change amount of the calculated SOC during a preset period and an SOC change amount average that is an average of the SOC change amount of all the plurality of battery cells, and an abnormal deterioration diagnosis unit configured to diagnose abnormal deterioration of each of the plurality of battery cells using the SOC change amount and the SOC change amount average thereby accurately diagnosing abnormal deterioration of battery cells.