Ultra-Fast Charging Challenges in Grid Connected Charging Station: A Review

Electric Vehicles (EVs) and available charging infrastructures are unable to provide long distance trips without interruption due to the necessity of waiting long time to recharge the battery and moderate speed range. Charging time of EV has been a major factor that influences the customer to not attract much towards EVs. The ultra-fast charging (UFC) provides solution for such issue which charges EV with minimum time. Nevertheless, it is quite challenging and complicated to realize UFC due to the developments of battery cells, charging methods and impact on electric grid. The widespread of EV usage and necessitates to increase the charging demand have a number of effects on the electric grid. This paper aims to review analysis UFC in EV by including basic concepts, charging levels, types of chargers, positive and negative impacts of UFC on electric grid. Different fast charging strategies and power converter topologies for EV are presented and compared in this article.