METHOD AND APPARATUS FOR DIAGNOSING BATTERY

A method for diagnosing a battery according to one aspect of the present disclosure includes a voltage determining step of determining an OCV (Open Circuit Voltage) of a battery; a capacity selecting step of selecting a positive electrode capacity corresponding to the OCV from a positive electrode profile representing a corresponding relationship between the positive electrode capacity and a positive electrode voltage of the battery, and a negative electrode capacity corresponding to the OCV from a negative electrode profile representing a corresponding relationship between the negative electrode capacity and a negative electrode voltage of the battery; a depth calculating step of calculating a positive electrode depth, which is a ratio of the selected positive electrode capacity to a positive electrode entire capacity of the battery, and a negative electrode depth, which is a ratio of the selected negative electrode capacity to a negative electrode entire capacity of the battery; and a diagnosing step of diagnosing a state of the battery based on at least one of the positive electrode depth and the negative electrode depth.