Wireless charging will not slow down the charging speed through the mobile phone case.
You can use wireless charging with a mobile phone case. The phone case will not affect wireless charging. Unless your mobile phone case is very thick, which has isolated the thickest limit of contact between the power bank and the mobile phone, your charging will not be restricted, you can charge directly, and the charging will be very fast. , will not affect the charging speed.
The speed is the same as if you don’t wear a mobile phone case, so you don’t have to worry about these. If you are really worried about these, you can also directly remove the mobile phone case while charging, so you can cancel it. You have nothing to worry about anymore.
Qi wireless charging has requirements for charging distance, and the maximum charging distance is only 10 mm. This is a bit of a hindrance for Chinese mobile phone users who like to use mobile phone cases. Although there is no need to remove the mobile phone case, there are requirements for the thickness of the mobile phone case. Some charging boards indicate that the thickness of the protective case should not exceed 3 mm.
Since most smartphones that support wireless charging use Qi wireless charging standard technology. This technology uses electromagnetic induction technology to convert electric current into electromagnetic force. The mobile phone converts electromagnetic force into electric current through the built-in coil for charging. However, the disadvantage of this technology is that it makes the device heat up. Therefore, using a wireless charger for a mobile phone with a mobile phone case affects its heat dissipation.
Basic Principle
The alternating current of a certain frequency in the primary coil generates a certain current in the secondary coil through electromagnetic induction, thereby transferring energy from the transmission end to the receiving end.
At present, the most common charging solution uses electromagnetic induction. In fact, there is not much mystery in the technical implementation of electromagnetic induction solutions. China's local BYD Company, as early as December 2005 The patent applied for for a non-contact induction charger uses electromagnetic induction technology.
It consists of an energy sending device and an energy receiving device. When the two devices are adjusted to the same frequency, or vibrate at a specific frequency, they can exchange each other's energy, which is currently the A technology being researched.
A research team led by MIT physics professor Marin Soljacic used this technology to light up a 60-watt light bulb two meters away and named it WiTricity. The diameter of the coil used in this experiment reaches 50cm, which cannot be commercialized yet. If the size of the coil is reduced, the received power will naturally decrease.