Life of Charge (LOC) Model of LiFePO4 Battery

摘要

This paper reports a mathematical model algorithm for LiFePO(4 )Battery life which encompasses the development of life of charge (LOC). The presented model consists of battery state estimation (SOC), Open-Circuit Voltage (OCV), battery capacity and SOC effective coefficient. An equivalent circuit model was designed to illustrate the SOC. The OCV model takes experimental data provided by fast static calibration method for curve fitting. Further, the battery capacity was acquired by MATLAB through battery cycle aging experiments and it was observed that the effective coefficient was reduced with the growth of cycle times. The LOC model can be used in applications requiring LiFePO4 battery management system.