Battery Diagnosis Apparatus, Battery Pack, Battery System And Battery Diagnosis Method

Abstract: This battery diagnosis apparatus comprises: a data acquisition unit for acquiring capacity-voltage relationship data of a battery cell; and a processor configured to generate a voltage profile and a differential voltage profile of the battery on the basis of the capacity-voltage relationship data. The processor is configured to extract a first profile of interest from the voltage profile on the basis of a feature point of the differential voltage profile. The processor is configured to determine a characteristic slope associated with the first profile of interest. The processor is configured to diagnose a degradation state of the battery cell on the basis of the characteristic slope.

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