Deployment of a Bidirectional MW-Level Electric-Vehicle Extreme Fast Charging Station Enabled by High-Voltage SiC and Intelligent Control

Abstract

Considering the fact that electric vehicle battery charging based on the current charging station is time-consuming, the charging technology needs to improve in order to increase charging speed, which could reduce range anxiety and benefit the user experience of electric vehicle (EV). For this reason, a 1 MW battery charging station is presented in this paper to eliminate the drawbacks of utilizing the normal 480 VAC as the system input to supply the 1 MW power, such as the low power density caused by the large volume of the 60 Hz transformer and the low efficiency caused by the high current. The proposed system utilizes the grid input of single-phase 8 kVAC and is capable of charging two electric vehicles with 500 kW each, at the same time. Therefore, this paper details how high-voltage SiC power modules are the key enabler technology, as well as the selection of a resonant-type input-series, output-parallel circuitry candidate to secure high power density and efficiency, while intelligently dealing with the transient processes, e.g., pre-charging process and power balancing among modules, and considering the impact on the grid, are both of importance.

Intelligent Transportation Systems for Electric Vehicles

“…Charging based on carbon intensity and within the boundaries of existing regional flexibility markets, or contributing to existing regional flexibility markets while increasing flexibility resources. By addressing carbon neutrality effectively through smart energy management, stakeholders may positively contribute to the UN's Sustainable Development Goals 7,11,and 12. There is a need to promote smart energy management to customers by grid operators -Manage power limitation taking into account EV owners' energy needs for daily mobility. A diverse engagement of prosumers in service providing to allow clear demand indications from grid operators and market signals are required, and charging in both directions.…”

“…Studies [12,16] lean on fast charging and electric vehicles, where on [12] researchers propose a 1 MW battery charging station to overcome the drawbacks of the use of a normal 480 VAC, and in [16], based on IoT, it is suggested an optimal EV rapid charging navigation method.…”