Battery Diagnosis Apparatus, Battery Diagnosis Method And Battery Diagnosis System

Abstract: A battery diagnosis apparatus, a battery diagnosis method and a battery diagnosis system are provided. The battery diagnosis apparatus according to the present invention comprises: a data acquisition unit for acquiring, about a battery in a BOL state, battery information indicating temporal variation histories of the terminal voltage and the charging current of the battery for each charging cycle carried out a standard number of times according to a CC-CV charging protocol; and a control unit for calculating, on the basis of the battery information, an initial CC capacity ratio for each charging cycle carried out the standard number of times. The control unit determines a representative initial CC capacity ratio on the basis of the initial CC capacity ratio for each charging cycle, and compares the representative initial CC capacity ratio to a predetermined representative reference CC capacity ratio so as to diagnose whether the battery shows signs of accelerated degradation.

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