Advanced Battery-Assisted Quick Charger for Electric Vehicles

Electric vehicles (EVs) have gained considerable attention owing to their excellent characteristics as transportation vehicles and due to their energy storage capacity. Unfortunately, this massive deployment of EVs leads to significantly high electricity demand due to their charging requirements, particularly when they are charged uncoordinatedly. In addition, the concentrated charging of EVs can potentially decrease the quality of electricity, including frequency and voltage, in addition to causing other electrical grid problems. These conditions have motivated the development of technology and policies for minimizing these negative impacts. In this chapter, an advanced quick charging system for EVs that utilizes batteries to support the simultaneous fast charging of EVs has been described, including a description of its performance under different contracted electricity capacities, ambient temperatures (seasons), and high charging demand. In addition, the charging and discharging behaviors of EVs under different ambient temperatures have been explained. Our findings suggest that charging at high ambient temperature (e.g., during summer) allows a significantly higher charging rate than charging performed at low ambient temperature (e.g., during winter). A higher charging rate leads to shorter charging time. Furthermore, the battery-assisted charging system exhibited excellent performance because it enabled optimum quick charging during simultaneous charging in addition to maintaining the contracted electricity of the charger.