With the strong support of the government, new energy vehicles have developed rapidly in recent years, and more and more people begin to use electric vehicles as an environmentally friendly way of travel. At the same time, many car manufacturers believe that this is the development direction of cars in the future, and have invested a lot of money in R & D. However, due to the practical obstacles of charging problem, it has not been fully popularized.

We know that the important parts of electric vehicles are batteries and charging piles. Due to the short time of research and development of wireless charger, the use of lithium battery can only become another bottleneck. Compared with wired charging pile, wireless charging has many advantages and can adapt to the future development trend of new energy vehicles. Next, Xiaobian will share with you the technical analysis and application of automotive wireless charging solutions.
1. What is the wireless charging solution technology for cars? What is the principle?
A: the common induction type, resonance type and microwave transmission type are the wireless charging types currently divided by electromagnetic induction type, but the basic principle is the same on the whole. In other words, the wireless transmission of energy is realized by using the electromagnetic induction of AC electromagnetic field.
(1) Inductive radio energy transmission is a relatively mature technology at present. Many mobile phones charge wirelessly, and even our common microwave ovens use the principle. The space of digital equipment is small, the receiving coil is small, and the power of charging equipment is small, so the charging distance is very close (sometimes it needs to contact the charging seat), but the electromagnetic radiation is relatively small.
(2) Resonant charging is a charging technology currently being developed by MIT, which is not complicated. They can use electromagnetic induction phenomenon and resonance principle to improve the efficiency of wireless charging. The resonance transmission distance is a little farther than the general induction type. MIT is currently conducting miniaturization research. For electric vehicles several meters long, the technical pressure in this regard is not too great.
(3) Microwave transmission appears more in science fiction movies or novels during this period. In fact, it is a good method of wireless power transmission, but it is not practical on a large scale due to the limitations of power transmission. The advantage is long transmission distance. Even the energy transmission between spacecraft and the ground can realize directional transmission (antenna emission orientation). Look forward to the future prospects.
2. Understand the benefits of car wireless charging solutions and wireless charging?
Although the popularity of wireless charging piles will take some time, many advantages such as high security, convenient use and easy installation have emerged. Because the wireless charging pile can be installed in a distributed layout, it can not only reduce the pressure on the power grid, but also the electric vehicle does not need to charge a fixed place, with a higher degree of freedom. In addition, the hardware standard of wireless charging is easy to unify. After all, it is not easy to persuade manufacturers to unify the interfaces of wired charging—— More obvious on mobile phones. Each charger is different, but there are only a few wireless systems.