SYSTEM, METHOD, AND PROGRAM FOR PREDICTING STATE OF BATTERY

摘要

A method and system for predicting degradation of a battery. Modeling of a battery is made to be separated into an aging section and a current-carrying section. The modeling is established such that the amount of degradation of a capacity retention ratio is determined by the linear sum of stay at each temperature and each SOC. The separation into degradation components at each temperature and each SOC enables predicting degradation under various degradation environments. A model for a battery separated into an aging section and a current-carrying section and a calculation model of a root law are combined into an objective function, and a table of discharge coefficients ah(T,S) and a table of current-carrying coefficients ac(T,S) are generated using a solver, where T indicates the temperature and S indicates SOC. Once tables are generated, degradation of the battery can be predicted by calculation using the tables.