Wireless charging, also known as inductive charging and contactless inductive charging, originated from wireless power transmission technology. It uses near-field induction, that is, inductive coupling, to transfer energy from power supply equipment (charger) to electrical equipment, which uses the received energy to charge the battery and provide it for its own operation.

Because energy is transferred between the charger and the electrical equipment through inductive coupling, there is no wire connection between them, so both the charger and the electrical equipment can be exposed without conductive contacts. Wireless charging mainly uses electromagnetic induction, magnetic field vibration and radio wave technology.

The basic principle of wireless charging: using electromagnetic induction, that is, alternating current with a certain frequency in the primary coil generates a certain current in the secondary coil through electromagnetic induction, thus transferring energy from the transmitting end to the receiving end.

At present, there are many mobile phones that support wireless charging, such as iPhonex. When charging, just put the mobile phone on the wireless charging board, and it can be charged automatically. 20 18, more and more new smartphones released by mobile phone manufacturers support wireless charging.