Electrical energy receiving end capable of overvoltage protection and wireless electrical energy transmission device

An electrical energy receiving end capable of overvoltage protection, used for receiving energy transmitted from a spaced electrical energy transmitting end, the electrical energy receiving end comprising a receiving coil, an impedance matching network, a rectifier and filter circuit, a DC-DC converter, and an overvoltage protection switching circuit;

• the receiving coil comprising a first receiving coil and a second receiving coil, the first receiving coil and the second receiving coil being orderly connected in series between an input terminal of the electrical energy receiving end and the rectifier and filter circuit;
• the impedance matching network comprising a first impedance circuit connected in series with the first receiving coil, the receiving coil resonating with the impedance matching network to be coupled with magnetic field energy transmitted from the electrical energy transmitting end to generate a high-frequency alternating voltage signal;
• the rectifier and filter circuit receiving the high-frequency alternating voltage signal to generate a DC voltage signal;
• the DC-DC converter receiving the DC voltage signal to convert to a desired output voltage to an electronic device;
• the overvoltage protection switching circuit being connected in series between the receiving coil and a ground terminal, wherein when the DC voltage signal exceeds a preset voltage value after detection, a switching state of the overvoltage protection switching circuit is controlled through a switching control signal, enabling the DC voltage signal not to exceed the preset voltage value.