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Title: Demonstrating Dynamic Wireless Charging of an Electric Vehicle - The benefit of Electrochemical Capacitor Smoothing

The wireless charging of an electric vehicle (EV) while it is 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 article summarizes the experimental results on power smoothing of in-motion wireless EV charging performed at the Oak Ridge National Laboratory (ORNL) using various combinations of electrochemical capacitors at the grid side and in the 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 (ESL) fabricated the passive and active parallel lithium-capacitor (LiC) unit used to smooth the grid-side power. The power pulsation reduction was 81% on the grid by the LiC, and 84% on the vehicle for both the LiC and the carbon ultracapacitors (UCs).
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2]
  1. (JNJ), John M. [JNJ- PLC
  2. ORNL
Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: IEEE Power Electronics Magazine; Journal Volume: 1; Journal Issue: 1
Research Org:
Oak Ridge National Laboratory (ORNL); National Transportation Research Center (NTRC); Power Electronics and Electric Machinery Research Facility
Sponsoring Org:
ORNL work for others
Country of Publication:
United States
WPT; wireless power transfer; wireless charging of EVs; electromagnetic resonance induction coupling; Silicon Carbide Inverter; dynamic wireless charging; in-motion wireless charging