Electric vehicle drivers of the future might not need to plug in to charge their batteries — and they may not even need to stop.
Projects underway in Florida, Indiana, Michigan and Utah are testing a technology that would charge vehicles as they move along special road surfaces.
The basic idea is similar to those employed by wireless charging stations, or even wireless phone chargers, said Nadia Gkritza, a professor at the Lyles School of Civil Engineering at Purdue University in West Lafayette, Ind. Coils installed in roadways circulate a high-frequency current to generate a magnetic field. Receivers on the vehicle pick up that energy, allowing it to charge the battery or power the motor directly, she said.