Patent ID: 11870274
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The wireless charging device according to claim 3, wherein the second charging unit comprises a second inverter circuit and a second transmitter coil group comprising one or more second transmitter coils, one end of the second inverter circuit is connected to the first controller and the other end of the second inverter circuit is connected to each of the second transmitter coils in the second transmitter coil group;
before obtaining the second electromagnetic coupling strength, the first controller is further to control the second inverter circuit to output a second excitation signal;
the second inverter circuit is to generate the second excitation signal, and output the second excitation signal to each of the second transmitter coils;
each second transmitter coil is to receive the second excitation signal, and generate and transmit a second induction signal under excitation by the second excitation signal, wherein the second induction signal is used to induce a to-be-charged device located in an induction area of the second transmitter coil; and
when the to-be-charged device is detected through induction, the first controller is further to obtain an identifier of the to-be-charged device.