Method for foreign object detection in wireless charging, wireless charging device, and storage medium

A wireless charging device comprising:

• a processor;
• and
• a memory configured to store computer readable instructions which, when executed by the processor, are operable with the processor to:
• obtain a first parameter value and a second parameter value according to:
• a charging current outputted by the wireless charging transmitter, when a transmitted power of the wireless charging transmitter falls into a first charging power range;
• or
• a charging voltage outputted by the wireless charging transmitter, when the transmitted power of the wireless charging transmitter falls into a second charging power range;
• obtain a reference received power according to the first parameter value, the second parameter value, and the received power of the wireless charging receiver;
• and
• determine, according to a difference between the transmitted power and the reference received power, that a foreign object is located between the wireless charging transmitter and the wireless charging receiver;
• wherein in the first charging power range, the wireless charging transmitter outputs a constant voltage, and in the second charging power range, the wireless charging transmitter outputs a constant current.

A non-transitory computer readable storage medium configured to store computer programs which, when executed by a processor, are operable with the processor to:

• obtain a first parameter value and a second parameter value according to:
• a charging current outputted by the wireless charging transmitter, when a transmitted power of the wireless charging transmitter falls into a first charging power range;
• or
• a charging voltage outputted by the wireless charging transmitter, when the transmitted power of the wireless charging transmitter falls into a second charging power range;
• obtain a reference received power according to the first parameter value, the second parameter value, and the received power of the wireless charging receiver;
• and
• determine that a foreign object is located between the wireless charging transmitter and the wireless charging receiver when a difference between the transmitted power and the reference received power is greater than a preset threshold;
• wherein in the first charging power range, the wireless charging transmitter outputs a constant voltage, and in the second charging power range, the wireless charging transmitter outputs a constant current.