APPARATUS AND METHOD FOR DIAGNOSING A BATTERY

A method for diagnosing a battery according to first aspect of the present disclosure diagnoses a battery assembly including a battery bank provided by connecting a plurality of battery cells in parallel with each other, and the method includes a differential battery bank profile generating step of generating a differential battery bank profile representing a relationship between a differential capacity, which is obtained by differentiating a capacity of the battery bank with respect to a voltage of the battery bank, and the voltage of the battery bank; and a diagnosing step of diagnosing a state of the battery bank based on a difference value between a differential capacity value of a target peak located in a predetermined voltage section among a plurality of peaks of the differential battery bank profile and a differential capacity value of a valley adjacent to the target peak.