CAPACITY DETERIORATION ESTIMATING DEVICE, POWER STORAGE DEVICE, AND CAPACITY DETERIORATION ESTIMATING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a capacity deterioration estimating device that estimates capacity deterioration with high accuracy, a power storage device, and a capacity deterioration estimating method.SOLUTION: The capacity deterioration estimating device includes a circuit 121a configured to relatively change electromotive force curves of a positive electrode and a negative electrode previously acquired in capacity direction for fitting a difference between electromotive force curves of both the electrodes to an electromotive force curve of a secondary battery.