Working principle and development history of wireless charging

With the advancement of technology, wireless charging technology is becoming an increasingly common solution in daily life. From smartphones to electric vehicles, the application of wireless charging has gradually expanded to multiple fields. Compared with traditional wired charging, wireless charging provides higher convenience and frees people from the shackles of tangled wires.

In the past decade, wireless charging technology has gone from an attractive concept to an indispensable part of daily life. Whether in coffee shops, airports, or at home, we can see more and more wireless charging devices, with the popularity of smartphones, electric vehicles, wireless headphones and other devices.

Working principle and development history of wireless charging

Wireless charging technology is based on the principle of electromagnetic induction, also known as electromagnetic wave energy transmission technology. Its core principle is to use electromagnetic fields to transfer energy, and to transmit power through electromagnetic induction between a charger (charging stand) and a receiving device in the device. The coil at the charger end generates an alternating electromagnetic field, which can be captured and converted into electrical energy by the coil at the receiving end without physical contact, thereby charging the device.

The main advantage of wireless charging is its convenience. Users no longer need to plug and unplug cables to charge. They only need to place the device on the charging pad to start charging. However, the technology works much less efficiently than traditional wired charging. Due to the lower efficiency of energy transfer, wireless charging usually takes longer to complete the same amount of power transfer in actual use.