CAPACITY PREDICTION METHOD, LIFE PREDICTION METHOD, AND LIFE PREDICTION SYSTEM OF BATTERY PACK

摘要

PROBLEM TO BE SOLVED: To provide a method and a system for easily and highly accurately predicting future capacity and life of a battery pack which is constituted of a plurality of battery elements.SOLUTION: In a method for predicting capacity of a battery pack for predicting and calculating future capacity of a battery pack 10 which is constituted by serially connecting element blocks B1-B40 constituted by connecting a plurality of elements A1-A12 in parallel, the total predicted number N of elements to be assumed to fail in a predetermined period is set in the battery pack 10, the numbers of combinations C, Cof failed elements which can be included in each element block are calculated based on the set total predicted number N, expected capacity E is calculated by multiplying probabilities Pof taking the number of combinations Cof the failed elements and capacity Capto take the sum, and normality of a future operating state of the battery pack is determined by using the calculated expected capacity E as predicted capacity of the battery pack.