Dynamic Wireless Charging of Electric Vehicle Demonstrated at Oak Ridge National Laboratory: Benefit of Electrochemical Capacitor Smoothing

Journal Article · Wed Jan 01 04:00:00 EST 2014 · IEEE Power Electronics Society Magazine

DOI:https://doi.org/10.1109/MPEL.2014.2300978· OSTI ID:1143551

Miller, John M ^[1]; Onar, Omer C ^[1]; White, Cliff P ^[1]; Campbell, Steven L ^[1]; Coomer, Chester ^[1]; Seiber, Larry Eugene ^[1]

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1. ORNL

Abstract Wireless charging of an electric vehicle while in motion presents challenges in terms of low latency communications for roadway coil excitation sequencing, and maintenance of lateral alignment, plus the need for power flow smoothing. This paper summarizes the experimental results on power smoothing of in-motion wireless EV charging performed at Oak Ridge National Laboratory using various combinations of electrochemical capacitors at the grid-side and in-vehicle. Electrochemical capacitors of the symmetric carbon-carbon type from Maxwell Technologies comprised the in-vehicle smoothing of wireless charging current to the EV battery pack. Electro Standards Laboratories fabricated the passive and active parallel lithium-capacitor unit used to smooth grid-side power. Power pulsation reduction was 81% on grid by LiC, and 84% on vehicle for both lithium-capacitor and the carbon ultracapacitors.

• Research Organization: Oak Ridge National Laboratory (ORNL); Power Electronics and Electric Machinery Research Facility
• Sponsoring Organization: ORNL work for others
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1143551
• Journal Information: IEEE Power Electronics Society Magazine, Journal Name: IEEE Power Electronics Society Magazine Journal Issue: 1 Vol. 1; ISSN 2329-9207
• Country of Publication: United States
• Language: English