GRA
Well-known member
https://www.greencarcongress.com/2018/10/20181020-ornl.html
While high power may be needed to minimize the cost of dynamic charging, I fail to see how high power dynamic wireless charging can minimize the cost and complexity relative to static wireless charging, as to fully charge you'd need 15-20 miles of charging lane, with the attendant transmission and efficiency losses.. . . In the laboratory demonstration, power was transferred across a six-inch air gap between two magnetic coils and charged a battery pack. . . .
The demonstration advances DOE’s extreme fast-charging goal to develop a system that delivers 350 to 400 kilowatts and reduces the charging time for electric vehicles to 15 minutes or less.
ORNL researchers will explore innovations to increase power transfer level to 200 and eventually 350 kilowatts, while refining dynamic wireless charging technology.
A dynamic system enables the automatic charging of electric vehicles using wireless charging pads installed under roadways; higher power charging systems are needed to minimize the cost and complexity of dynamic charging. The goal is dynamic charging at highway speeds, Galigekere said.
The research was funded by DOE’s Vehicle Technologies Office (VTO) and performed at the National Transportation Research Center, a DOE user facility at ORNL.