The patent application describes how coils that are connected to a source of electricity could be embedded in the road surface to transmit power wirelessly to receivers mounted on EVs driving along.
“The invention optimizes inductive coupling between vehicle-mounted receiving coils and roadway-embedded transmission coils in order to maximize a vehicle charging rate while driving at speed on a roadway.
Ground penetrating radar detects and maps out the embedded charging coils so that a vehicle path can be laid out with the optimal charging capacity. A detection range of the radar extends beyond the charging coil presently beneath a vehicle, potentially beyond the next few coils in the travel direction of the vehicle.”
It’s an interesting proposal that could lead to EVs having smaller batteries, which in turn can make the vehicles much lighter and more efficient, considering they could be charged on the go, but it’s not without its flaws, the biggest of them being the potential costs of putting copper wire in the roads themselves.
Another potential problem is the limited output that current dynamic wireless charging solutions are capable of providing – most offer between 11 kilowatts and 20 kW – but even those are still at the experimental level. A was achieved on a segment of a one-mile test road in Sweden in 2021, where Israeli startup ElectReon successfully tested its technology at various speeds of up to 37 miles per hour on a 40-ton truck.on a 3,444-foot stretch of road.
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