Wireless charging method and apparatus thereof

A wireless charging method for a system, the system comprising a wireless power transmission device and a wireless power reception device, the method comprising:

• generating, by the wireless power transmission device, an electromagnetic field via a transmission coil for enabling the wireless power reception device disposed on the wireless power transmission device to charge a battery of the wireless power reception device based on the generated electromagnetic field;
• performing, by the wireless power reception device, a wireless charging operation by wirelessly receiving the electromagnetic field generated by the wireless power transmission device and providing electric power, corresponding to the received electromagnetic field, to the battery;
• activating, while the wireless power transmission device generates the electromagnetic field via the transmission coil or while the wireless power reception device charges the battery based on the generated electromagnetic field by the wireless power transmission device, an air circulation member of the wireless power transmission device to generate air flow by the wireless power transmission device;
• transmitting, by the wireless power reception device, a first signal to the wireless power transmission device at a defined time of day via a reception coil during the wireless charging operation;
• and
• adjusting, by the wireless power transmission device, a driving speed of the air circulation member in response to receiving the first signal while the air circulation member of the wireless power transmission device is activated.

A wireless power transmission device comprising:

• a housing including an upper cover and a lower cover;
• a transmission coil positioned between a supporter and the upper cover;
• an air circulation member configured to generate air flow for removing heat generated by the wireless power transmission device to an outside of the housing, the air circulation member being disposed in proximity to the transmission coil;
• and
• a printed board assembly (PBA) comprising a control circuit electronically connected to the transmission coil and the air circulation member,
• wherein the wireless power transmission device is configured to:
• detect a wireless power reception device on the upper cover,
• generate an electromagnetic field via the transmission coil in response to detecting the wireless power reception device, the electromagnetic field enabling the wireless power reception device to charge a battery thereof based on the generated electromagnetic field,
• while generating the electromagnetic field via the transmission coil, activate the air circulation member to generate air flow,
• receive, from the wireless power reception device, while generating the electromagnetic field, a first signal relating to day time or night time, at a specific time of day via the transmission coil, and
• adjust a driving speed of the air circulation member in response to receiving the first signal while the air circulation member is activated.

A wireless power reception device comprising:

• a wireless power reception circuit comprising a reception coil;
• a battery;
• and
• one or more processors which are electronically connected with the wireless power reception circuit,
• wherein the wireless power reception circuit is configured to receive, via the reception coil, an electromagnetic field generated by a transmission coil of a wireless power transmission device, and
• wherein the wireless power reception device is configured to:
• provide electric power, corresponding to the received electromagnetic field, to the battery, and
• transmit a signal to the wireless power transmission device at a defined time of day via the reception coil for adjusting a driving speed of an air circulation member included in the wireless power transmission device.