Wireless charging method, receiver, terminal device, and charger

A receiver, comprising:

• an auxiliary power supply module;
• an oscillation circuit to receive first energy sent by a transmitter, wherein the first energy is pulse energy;
• a sampling control module configured to:
• collect 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 a power processor, control the auxiliary power supply module to supply power to the power processor, so that the power processor is started;
• and
• a power processor to send a power transfer instruction to the transmitter to instruct the transmitter to send second energy based on the power transfer instruction, wherein the second energy is not pulse energy, and wherein the second energy is used to provide electric energy for a load in the receiver;
• wherein the auxiliary power supply module comprises a battery and a power supply control unit,
• wherein a first end of the power supply control unit is connected to an output end of the battery, a second end of the power supply control unit is connected to the sampling control module, and a third end of the power supply control unit is connected to the power processor;
• and
• wherein the power supply control unit is configured to output electric energy of the battery to the power processor under control of the sampling control module.

A wireless charging method, applied to a receiver, wherein the receiver comprises an oscillation circuit, a power processor, a sampling control module, and an auxiliary power supply module, and the method comprises:

• receiving, by the oscillation circuit, first energy sent by a transmitter, wherein the first energy is pulse energy in a ping phase;
• collecting, by the sampling control module, a first voltage value output by the oscillation circuit based on the first energy in the ping phase;
• when the first voltage value is less than a startup voltage value of the power processor, controlling the auxiliary power supply module to supply power to the power processor, so that the power processor is started;
• and
• sending, by the power processor, a power transfer instruction to the transmitter to instruct the transmitter to second energy based on the power transfer instruction, wherein the second energy is not pulse energy, and wherein the second energy is used to provide electric energy for a load in the receiver.

A terminal device, comprising a receiver, the receiver comprising:

• an auxiliary power supply module,
• an oscillation circuit is configured to receive first energy sent by a transmitter, wherein the first energy is pulse energy;
• a sampling control module is configured to:
• collect 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 a power processor, control the auxiliary power supply module to supply power to the power processor, so that the power processor is started;
• and
• the power processor is configured to send a power transfer instruction to the transmitter, so that the transmitter sends second energy based on the power transfer instruction, wherein the second energy is not pulse energy, and the second energy is used to provide electric energy for a load in the receiver.