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

Ziwei Liang, Daniel Merced, Mojtaba Jalalpour and Hua Bai
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Ziwei Liang: Department of Electrical Engineering and Computer Science, University of Tennessee, Knoxville, TN 37996, USA
Daniel Merced: Department of Electrical Engineering and Computer Science, University of Tennessee, Knoxville, TN 37996, USA
Mojtaba Jalalpour: Department of Electrical Engineering and Computer Science, University of Tennessee, Knoxville, TN 37996, USA
Hua Bai: Department of Electrical Engineering and Computer Science, University of Tennessee, Knoxville, TN 37996, USA

Energies, 2020, vol. 13, issue 7, 1-20

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.

Keywords: silicon carbide; extreme fast charging; DC transformer; electric vehicle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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