An Isolation Circuit based Charging and Discharging Model of On-Board Charger in Electric Vehicle

Abstract

A couple of hybrid electric vehicles (HEV) predominantly two-wheelers led to fire accidents, which will injure humans or lost their life. The probable cause of the fire is because of the non-isolation of abnormalities and instability in the charge and discharge cycle of electric vehicle batteries as a part of the battery management system (BMS). A battery is one of the sources of electrical energy, by using power electronic converters it can store or retain the electrical energy. Battery isolation is more important to protect against low output voltage or cell voltage and excessive charging current. The battery's charge level in perspective of its capacity is nothing but a state of charge (SOC). It is an important metric for evaluating battery storage systems. Because of the scalability and portability of cells along with inherent high charge-discharge cycles for the use of electric vehicles (EV), it is important to conFigure the isolated charging and discharging model (CDM) of batteries as a part of BMS. The growing number of electric vehicles improves the technological parameters of OBCs. Due to limitations in interior space availability, it has to keep in mind to incorporate the effective CDM into OBC. This paper developed the simulation circuit of an OBC with isolated CDM and the obtained results are analyzed.