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The wireless charging receiving coil receives the current transmitted by the wireless charging transmitting coil. When the wireless charging coil transmits the current, the receiving coil receives the transmitted current to the current storage end. This technology is usually used in mobile phones, car navigation, watches, desk lamps, headphones and other electronic products industry, this relatively novel charging technology has brought a lot of convenience to users.

Wireless charging coils use wireless transmitting coils to transmit electrical energy in the electric and magnetic fields between the charger and the device, and the receiving coils and capacitors form a resonance between the charger and the device, the loss of this wireless charging technology is lower than that of wired charging technology, and the high conversion rate is also a key factor in the use of wireless chargers around the world. In recent years, with the rapid development of electronic technology, various electronic devices have entered people's lives, and the traditional wired charging method is more prominent, such as carrying inconvenience, affecting beauty, and low safety. Wireless charging coil charging method has received more and more attention and research.