According to reports, the International Wireless Charging Exhibition will be held at Guangzhou Pazhou Exhibition Hall from November 26th to 28th, 2014. The exhibition will showcase wireless charging materials, wireless charging products, wireless charging series equipment, etc., including wireless charging mobile phones, wireless. Charging camera, wireless charging PC/wireless charging tablet, wireless charging TV, wireless charging car, etc.

In 1891, the Russian-born Serbian electrical engineer and physicist Nikola Tesla successfully delivered electricity to the target appliance through electromagnetic induction. Later, for some reason, the research on power wireless was suspended. In May 2001, French scientist Pygnullette made an open experiment at the International Wireless Power Transmission Technology Conference: using microwave technology to transmit electrical energy wirelessly, lighting a 200-watt bulb 40 meters away. At present, wireless charging technology is mainly applied to mobile phones and tablets, but many people are also developing wireless charging technology for automobiles.

Electric vehicles need to rely on charging stations or charging stations. The charging station has a large area and high investment, and it is difficult to promote it in the central area of ​​the city, and the utilization rate is not high. Most of the 12 charging stations built in Beijing are idle. There are also many difficulties in the construction of charging piles. The approval is more troublesome, and the construction cost of charging piles is high, which is difficult to promote in a large area.

Charging piles are like wired routers. One line can only guarantee one computer to access the Internet, while wireless charging is like WiFi, and multiple computers and mobile phones can access the Internet at the same time. With wireless charging, a charging base station in a parking lot can charge multiple electric vehicles within a certain range.

The current wireless charging technology transmission is relatively small, and the distance is relatively short, and can not meet the needs of car charging, but has made gratifying progress in research, such as a meeting in 2012, Chery chief engineer Chen Jun said, Chery is developing high-power car wireless charging technology, "the goal is to reach 3,000 watts, and now can achieve 1500 watts." It is also reported that the wireless charging transmission distance can reach 9 meters, which can already charge at least 10 electric vehicles. The relevant departments should study the feasibility and standardization of this aspect.

In addition, there are people developing mobile wireless power supply technology. According to reports, the United States and South Korea are experimenting with wireless charging roads. Electric vehicles can be driven while charging. It is said that the technical difficulty of this solution is not great, but the cost is relatively high, and it needs to be modified. Existing roads, investment scale is certainly not small. If you consider that a car can carry a small battery to a remote location, this solution can still be considered.

London Mayor Boris Johnson once said that the city carries 75% of the world's population and also produces 80% of the world's pollution. Therefore, cities must take the lead in addressing pollution-related emissions. One important aspect is the use of low-carbon electric vehicles. Therefore, building a wireless trunk road in a big city has great environmental significance.

Wireless charging is a field that has just started. If it can develop effectively, it can solve the charging bottleneck of electric vehicle development to a large extent. However, due to its huge investment in research and development, it needs the encouragement and support of the state to speed up its research and development process and get it as early as possible. Promote the application.

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