Under the skin: How roads could charge your electric car as you drive
Inductive charging of EVs has been around as long as the modern EV and trialled in real-world conditions as far back as the early noughties. In its basic form, the principle is exactly the same as it is for wireless phone or toothbrush charging, or for generating a spark in a petrol engine ignition system.
The charging technology used for the project was developed by Israeli partner Electreon and consists of multiple charging pads sunk beneath 11cm of asphalt along the length of the road and connected by a cable. As the vehicle passes over each charging pad, its receiver, working at an induction frequency of 85kHz, generates electricity to charge the battery.
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