Can be traced back to the principle of wireless charging technology research in the 1830 s, scientists, Michael Faraday, first discovered the principle of electromagnetic induction, i.e., the change of magnetic field around will generate an electric current in the wire. In the 1890 s, one of his assistants, Edison spectral radiant energy research projects and later scientists Nikola Tesla (Nikola Tesla) confirmed the possibility of wireless transmission waves, and apply for the patent of the first. At present, there are four different commercial technologies in wireless charging, such as electromagnetic induction technology, radio wave technology and magnetic resonance technology, electric field coupling technology.
Wireless charging refers to the device which USES electromagnetic wave induction principle to charge, which is similar to the transformer. In the sending and receiving end, there is a coil connected to the wired power supply to generate an electromagnetic signal. The receiver coil induces the electromagnetic signal on the transmitter to generate the current to recharge the battery.
The wireless charging technology mainly adopts four methods: electromagnetic induction, magnetic resonance, radio wave type and electric field coupling.