Battery deterioration determination device, battery pack, battery deterioration determination method, and battery deterioration determination program

摘要

PROBLEM TO BE SOLVED: To provide a battery deterioration determination device, a battery pack, a battery deterioration determination method and a battery deterioration determination program which facilitate recognition of a degradation state of a battery pack.SOLUTION: A correlation storage part 15 stores in advance a correlation between a resistance value for evaluation and a discharge capacity for evaluation. A measurement part 11 measures a voltage and a current supplied from a battery pack 2. A discharge capacity calculation part 12 and an apparent resistance value calculation part 13 respectively calculate, based on the measured voltage and current, a discharge capacity and a resistance value of the battery pack 2. An resistance value for evaluation acquisition part 14 acquires the resistance value for evaluation based on a relationship between the calculated discharge capacity and resistance value of the battery pack 2. An apparent discharge capacity acquisition part 16 acquires the discharge capacity for evaluation of the battery pack 2 based on the acquired resistance value for evaluation and the correlation stored in the correlation storage part 15.SELECTED DRAWING: Figure 1