SECONDARY CELL DEGRADATION DIAGNOSIS SYSTEM, AND DEGRADATION DIAGNOSIS METHOD

摘要

[Problem] To accurately diagnose the condition of a secondary cell. [Solution] An embodiment of the present invention is provided with: a feature value calculation unit for reading relation data representing the relationship between the ratio of the amount of change in the voltage of a secondary cell to the amount of change in the amount of charge in the secondary cell and either the voltage of the secondary cell or the amount of charge in the secondary cell, specifying the voltage or the amount of charge at which the relationship with the ratio satisfies a predetermined condition on the basis of the relation data, and calculating a feature value for the secondary cell from the relationship data using the specified voltage or amount of charge as a reference; and a degradation diagnosis unit for diagnosing degradation in the secondary cell on the basis of the feature value.