SERVICE LIFE DETERMINING METHOD AND SERVICE LIFE DETERMINING DEVICE USING THE METHOD

摘要

PROBLEM TO BE SOLVED: To accurately judge the service life of a storage battery from a load power value. SOLUTION: An expected service life value L0 is found by comparing a measured load power value with previously found storage battery service life information vs, load power, the first amount L1 of service life lowering is found from the total discharge time H and the number N of times of discharge, the second amount of service life lowering is found from battery temperatures Tn measured at time intervals D, and the service life of a storage battery is judged by computing a remaining service life value L by the following equation.