Wireless charging solutions for EVs are here

As interest in eco-friendly electric vehicles, or EVs, continues to soar, some truly innovative companies are developing wireless charging solutions to make recharging EVs vastly simpler, resulting in an ultimately more frictionless consumer experience overall.


Israeli startup Electreon is taking a novel approach to the problem of charging an electric vehicle: it’s scoping out the possibility of electrifying roads to provide a charge for the EVs that traverse them. The company has been testing this inventive solution outside of Tel Aviv on roads with copper coils, embedded 900 feet below pavement, which transmit recharging wireless energy to the vehicle driving above. While millions of miles of roads would need to be retrofitted with this copper coiling, Electreon is focusing its pilot efforts on a public bus route in Tel Aviv to start, which has the added benefits of lowering reliance on imported oil and improving Israeli city air quality.


Wireless charge innovator WiTricity is partnering with big-name auto manufacturers like GM, Honda, and Nissan to license its wireless charging capabilities. The company invented a car-charging system for EVs to park over, and this system uses magnetic resonance to transfer energy to the battery located underneath the vehicle. WiTricity reported that the device has 90-93% charging efficiency and is the most interoperable system currently available. The charging system accommodates a range of car clearances and can be purchased as on-ground charging pad for a private residence or placed under the pavement for public use.


Stanford scientists Sid Assawaworrarit and Shanhui Fan published research around a new wireless charging system that can transfer energy to a moving device within arm’s length. While this research is still new and has only been tested on smaller subjects, it opens the door for future tests that could lead to a more efficient and cordless way of charging electric vehicles. Based on their current research, Assawaworrarit and Fan designed an amplifier that transmitted more than enough power to charge a phone over two feet away with 92% efficiency, and posited that they could transmit power to an object moving at 200 mph, far faster than any electric car will (or should) be moving.