At present, in the international community, auto manufacturers such as Audi, BMW, Mercedes, Volvo, Toyota, etc., communications companies such as Qualcomm have begun to study wireless charging technology for electric vehicles. Among them, Audi's wireless charging technology program is mainly aimed at the problem of efficiency loss during the transmission process. This plan uses a portable wireless charging system to make the transmission coil at the cable end closer to the receiving coil at the bottom of the electric car. Improve power transmission efficiency. The wireless charging technology developed by BMW and Mercedes-Benz has been tested and applied to the BMW i8. Volvo, for its part, has completed tests of an electric car's in-vehicle wireless charging system, which is said to take less than three hours. Due to the relatively mature wireless charging technology, it has already been put into use in some places abroad. In 2014, South Korea laid a 12-kilometer wireless charging section, and vehicles can drive and charge while driving on the road.