Initiatives to create a standard for wireless charging of electric vehicles have been discussed since the middle of the last decade, but the industry is in a period of consolidation and therefore the results of the standard unification will only be seen in the foreseeable future. WiTricity says it is on track to make its own designs the unified global standard for wireless charging of electric vehicle traction batteries.
Interview with WiTricity CEO Alex Gruzen Ars Technica admitted that the company is actively involved in cooperation with the SAE industry association, which brings together engineering specialists from the automotive industry around the world. The result of this work should be the adoption of a uniform standard for wireless charging of electric vehicles. In fact, the consolidation has already taken place after the purchase in 2019 by this company of the Qualcomm division specialized in this subject. By the spring of this year, the standard had been ratified, and now automakers have the opportunity to implement its support in manufactured vehicles.
In fact, Hyundai is already launching the Genesis GV60 crossover that supports wireless charging. At least in the South Korean market, this option will be available to customers. According to the ideas of the WiTricity boss, wireless charging stations should be concentrated primarily in residential complexes and private households as well as in parking lots. In China, three automakers have already started offering electric vehicles with wireless charging, and the number is set to increase over the next year.
According to the WiTricity boss, the wireless option of charging the battery of an electric car is quite effective, contrary to existing prejudices. No more than 8-10% is lost during the transmission of electricity from the grid to the traction battery. The best examples of electric vehicles with wired chargers have an efficiency of around 94%, but in many cases less than 90%, so the wireless standard is almost as good as traditional charging methods in this respect. The power of chargers for passenger electric vehicles reaches 3.3-6.6 kW, but a 75 kW version has been developed for commercial vehicles.
The possibility of wireless charging of electric vehicles on the road is not written off either. However, infrastructure costs in this case limit the feasibility of creating extended charging lines built under the roadway. Most likely, such technologies will be implemented in limited areas such as taxi waiting areas at airports or transport unloading areas in port areas. By the middle of the decade, electric vehicles will be able to feed power back into the grid without a cable connection, the head of WiTricity explained.