BACKUP POWER SOURCE SYSTEM, DEGRADATION ESTIMATION DEVICE, AND DEGRADATION ESTIMATION METHOD

摘要

A backup power supply system includes a secondary battery, an interface unit, a charging and discharging control unit, a detection unit, a remaining capacity estimating unit, a deterioration estimating unit, and a notification unit. The interface unit transmits a trigger signal based on an operation of a user. The charging and discharging control unit performs control of discharging the secondary battery and then charging the secondary battery or control of charging the secondary battery and then discharging the secondary battery when the trigger signal is received from the interface unit. The detection unit detects a voltage of the secondary battery at different timings. The remaining capacity estimating unit estimates a remaining capacity of the secondary battery based on the voltage of the secondary battery. The deterioration estimating unit estimates a deterioration state of the secondary battery based on the estimated remaining capacity. The notification unit outputs the estimated deterioration state.