Wireless charging device and method, and device to be charged

A device to be charged, comprising:

• a battery;
• a communication control circuit, configured to perform wireless communication with a wireless charging device during wireless charging of the battery;
• and
• a wireless receiver circuit configured to receive an electromagnetic signal transmitted by the wireless charging device and to convert the electromagnetic signal to an output current and an output voltage of the wireless receiver circuit and to send feedback information of a wireless transmitter circuit of the wireless charging device to adjust a transmitting power of a wireless transmitter circuit of the wireless charging device, such that at least one of an output voltage or an output current of a wireless receiver circuit in the device to be charged satisfies a present charging requirement in each stage of a trickle charging stage, a constant voltage charging stage, and a constant current charging stage for charging the battery,
• wherein the present charging requirement comprises at least one of a target charging voltage or a target charging current matching the charging stage in which the battery presently is, in which the transmitting power of the wireless transmitter circuit is adjusted when at least one of the output voltage or the output current of the wireless receiver circuit does not match at least one of the target charging voltage or the target charging current of the charging stage in which the battery presently is, until the at least one of the output voltage or the output current of the wireless receiver circuit matches the at least one of the target charging voltage or target charging current of the charging stage in which the battery presently is,
• wherein the communication control circuit comprises any one or more of following modules for performing wireless communication with the device to be charged:
• a Bluetooth module, a Wi-Fi module, a short-range wireless communication module based on a high carrier frequency, an optical communication module, an ultrasonic communication module, an ultra-wideband communication module and a mobile communication module.

A wireless charging method, applicable to a wireless charging device, comprising:

• transmitting power of the wireless charging device, wherein a transmitting power of the wireless charging device is adjusted based on feedback information of a device to be charged, such that at least one of an output voltage or an output current of a wireless receiver circuit in the device to be charged satisfies a present charging retirement in each stage of a trickle charging stage, a constant voltage charging stage, and a constant current charging stage for charging a battery, wherein the present charging requirement comprises at least one of a target charging voltage or a target charging current matching the charging stage in which the battery presently is, in which the transmitting power of the wireless transmitter circuit is adjusted when at least one of the output voltage or the output current of the wireless receiver circuit does not match it least one of the target charging voltage or the target charging current of the charging stage in which the battery presently is, until the at least one of the output voltage or the output current of the wireless receiver circuit matches the at least one of the target charging voltage or the target charging current of the charging stage in which the battery presently is, and
• performing wireless communication with a device to be charged during wireless charging of the device to be charged, wherein the wireless communication comprises one or more of Bluetooth communication, Wi-Fi communication, short-range wireless communication based on a high carrier frequency, optical communication, ultrasonic communication, ultra-wideband communication and mobile communication.