SECONDARY BATTERY DETERIORATION RATE CALCULATION METHOD, SECONDARY BATTERY LIFE PREDICTION METHOD, SECONDARY BATTERY DETERIORATION RATE CALCULATION SYSTEM AND SECONDARY BATTERY LIFE PREDICTION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a secondary battery deterioration rate calculation method, secondary battery life prediction method, secondary battery deterioration rate calculation system and secondary battery life prediction system for accurately performing a deteriorated state of a secondary battery and life prediction based on the deteriorated state.SOLUTION: An integrated discharge amount P, an integrated average discharge rate C and an integrated average discharge temperature Tp at the present time are calculated on the basis of history of a discharge amount, a discharge rate and a discharge temperature of a battery pack 10, an integrated neglect time U, an integrated average charged state S and an integrated average neglect temperature Ts at the present time are calculated on the basis of history of a neglect time, a charged state and a neglect temperature when the battery pack 10 is neglected, the calculated data is used to calculate the present time deterioration amount of the battery pack 10, and the present time deterioration rate rate is calculated from a ratio between the calculated present time deterioration amount and a lifetime deterioration amount max.