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Wireless charger related knowledge and certification process

Edit:Shenzhen Keliway Technology.,LtdUpDate:Apr 25, 2018

Wireless charger refers to the charger that does not use the traditional charging power cable to connect to the terminal device that needs to be charged. It adopts the latest wireless charging technology. The wireless charging technology obtained 20 patents in 2007, and a variety of devices can use one. Charging the base station, mobile phones, MP3 players, power tools, and other power adapters will no longer be wired. By using the magnetic field generated between the coils, magical transmission of electrical energy, inductive coupling technology will become a bridge to connect charging base stations and equipment. Most of the current chargers, such as the iPod and iPhone, charge the device's internal battery by direct contact with metal wires. The advantages of wireless charging technology are convenience and versatility. The disadvantage is that it is inefficient and can only provide electricity. Apple's Dock connector not only provides power, but also synchronizes audio and video files to the device via the USB interface. However, wireless charging technology will still bring improvements to WiFi and battery technology. For devices that do not require data transmission, this new technology will greatly reduce the number of chargers required by users. In addition, through the use of wireless charging technology, public mobile device charging stations will likely become a reality.


1. Theoretically speaking, wireless charging technology is not harmful to human body safety. The resonance principle used for wireless charging is magnetic resonance, which is transmitted only between coils that resonate at the same frequency, while other devices cannot receive bands. In addition, wireless charging technology The magnetic field used is itself harmless to the human body. However, wireless charging technology is a new type of charging technology. After taking advantage of the wireless source charger from Maiyuan Technology, many people are worried that wireless charging technology will be the same as when Wi-Fi and the antenna of a mobile phone first appeared. In fact, the technology itself is harmless. .

2. The wireless charging technology uses magnetic resonance to transmit electrical energy between the charger and the device in the electric and magnetic fields. The coil and capacitor form resonance between the charger and the device.

3, this system can be widely used in the future, such as the charging area for electric vehicles and the power transmission for the computer chip. The charging system developed using this technology requires only one hundred and fifty-fifth of the current charging time.

4. The conversion rate has always been a concern for many people. MIT showed that the wireless charging technology has a lower loss than wired charging technology. The wireless charging conversion rate is a few percentage points higher than that of cable. High transformation is also a key factor in the application of wireless chargers worldwide. However, the wireless charging technology is also limited by the distance. In the future development, it is necessary to solve the problem of the long-distance transmission for the precise positioning of the band and the magnetic field.

5. The core chip is one of the difficulties in the application of wireless charging technology. Accurate radiation range control, magnetic field frequency, other controls are all implemented by the chip.