Wireless charging technology (English: Wireless charging technology; Wireless charge technology) is derived from wireless power transmission technology, and can be divided into low-power wireless charging and high-power wireless charging.Xiaoqiao Electronics specializes in the production and manufacture of wireless chargers. Can be OEM.
Low-power wireless charging often uses electromagnetic induction, such as the Qi method for charging mobile phones, but ZTE’s wireless charging method for electric vehicles uses induction. High-power wireless charging often uses resonance (most electric vehicle charging uses this method). The power supply equipment (charger) transfers energy to the device that uses electricity. The device uses the received energy to charge the battery and at the same time supply itself Operational use.
Since the charger and the electric device use a magnetic field to transfer energy, there is no wire connection between the two, so both the charger and the electric device can achieve no conductive contacts exposed.
In 1890, physicist and electrical engineer Nikola Tesla (Nikola Tesla) had already done a wireless power transmission experiment. The international system of magnetic induction is also named after him. Tesla’s wireless power transmission method is to use the earth as the inner conductor and the earth’s ionosphere as the outer conductor. By amplifying the transmitter in a radial electromagnetic wave oscillation mode, a low frequency resonance of about 8 Hz is established between the earth and the ionosphere. Use surface electromagnetic waves surrounding the earth to transmit energy. However, due to lack of financial resources, Tesla’s bold vision has not been realized. Although later generations have fully confirmed the feasibility of this scheme in theory, the world has not yet achieved great unity, and it is impossible to broadcast and obtain free energy worldwide. Therefore, a great scientific idea died like this.
On June 7, 2007, the MIT research team published the research results on the website of the American “Science” magazine. The research team applied resonance to the transmission of electromagnetic waves and successfully “caught” the electromagnetic waves. They used copper coils as electromagnetic resonators. One coil was attached to the power transmitting side and the other was receiving power. After the transmitter sends an electromagnetic wave of a certain frequency, it spreads through the electromagnetic field to the receiver, and the electric power is transmitted wirelessly. This technology, which they called “wireless power”, has been tested many times and has successfully powered a 60-watt light bulb two meters away. The farthest transmission distance of this technology can only reach 2.7 meters, but the researchers believe that the power supply can already charge the battery within this range. And only need to install a power supply, you can power the electrical appliances in the whole house.
In February 2014, computer manufacturer Dell joined the A4WP camp. At that time, relevant executives of the camp said that they would upgrade the technology to support wireless charging of ultrabooks from computer manufacturers such as Dell. Most of the traditional laptops on the market have power supplies exceeding 50 watts, but Ultrabooks use Intel’s low-power processors and will be the first laptops to use wireless charging. Prior to this, wireless charging technology has always been only related to “small” mobile devices such as smart phones and small tablets. However, A4WP (“Wireless Power Alliance”), one of the three major wireless charging camps, recently announced that its technical standards have been upgraded, and the supported charging power has increased to 50 watts, which means that high-power devices such as laptops and tablets can also be used. Realize wireless charging.
In October 2017, the mobile phone family that supports wireless charging has ushered in 3 new members: iPhone 8, iPhone 8 Plus and iPhone X-they all support the Qi wireless charging standard, the purpose is to bring more to users Convenient, the phone itself looks cooler.