WIRELESS CHARGING METHOD, RECEIVER, TERMINAL DEVICE, AND CHARGER

A wireless charging method, a receiver, a terminal device, and a charger are provided. A receiver (20) includes an oscillation circuit (210), a power processor (220), a sampling control module (230), and an auxiliary power supply module (240). In a ping phase, the oscillation circuit receives first energy sent by a transmitter (10), and the sampling control module collects a first voltage value output by the oscillation circuit based on the first energy, and when the first voltage value is less than a startup voltage value of the power processor, controls the auxiliary power supply module to supply power to the power processor, so that the power processor is started. In a power transfer phase, the power processor sends a power transfer instruction to the transmitter, so that the transmitter sends second energy based on the power transfer instruction, to provide electric energy for a load in the receiver. In this way, when the receiver is outside an original degree of freedom range of the transmitter, the sampling control module may control the auxiliary power supply module to supply power to the power processor, so that the receiver is connected to the transmitter in the ping phase. This increases a degree of freedom of a wireless charging system.