Influence factors and identification of state-of-health for traction battery

Abstract

According to state of health parameters and management system function, the properties of parameters are detailed to satisfy requirements of electric equipment for traction battery. The result shows that: many parameters, such as the ways of charge and discharge, temperature and state of charge, have apparently effect on state of health in propulsion battery. Battery cycle life reduces obviously when much depth of discharge is applied. Low temperature limits attenuation morphology of power battery. And high temperature weaken solid-electrolyte interface. Different types of battery agree with specific law during capacity reduction. Based on battery power, resistance and reduction characteristics, it should be considered in battery health management research, which includes identified parameters and accurate equivalent model.