Wireless Phone Charger

- Feb 18, 2020-

Wireless Phone Charger

Wireless charging, of course, our expectation is to be unfettered, and charge anywhere in free space. Of course, the ideal is very plump and the reality is very skinny. With the current technology of wireless charging and wired charging, there are no special advantages. In addition to the convenience of not having to plug and play, the charging speed is still not as fast as wired charging. Comparable, cannot meet the needs of some users for mobile phones while charging.

However, for some users, wireless charging can now be played. In some scenarios where mobile phones are not frequently used, wireless charging can give full play to its advantages.

Technical principle of wireless charging

The core principle of wireless charging is based on electromagnetic induction, and the principle is not complicated. At present, there are two main branches of technology in the industry, one is the magnetic field induction technology represented by the Qi standard, and the other is the magnetic resonance technology represented by the Air Fuel standard.

Magnetic resonance is a better solution in principle, it supports longer charging distances, and it can support multiple devices charging at the same time. However, magnetic resonance technology is currently immature, and through the stacking of multiple coils, Qi standard wireless chargers can also be used to charge multiple devices at the same time.

However, magnetic resonance is still the future development direction of wireless charging. Qi has also incorporated magnetic resonance technology into its standard. It can be seen that close-range power transmission is not impossible.

Charging distance:

The maximum charging distance of Qi wireless charger is about 10 mm, so the other protective case can also be charged, and you don't need to take off the phone to charge.With the development and iteration of the Qi standard, the cost of wireless charging technology has gradually come down. There are more and more products around 100 RMB, and the experience cost can be considered low. At present, Xiaomi Huawei has tried to add wireless charging to its products, and it is expected that the wireless charging function will be more popular this year and next.