Wireless charging for new energy vehicles is coming soon

Most mobile phones today support wireless charging. Just place your phone on the wireless charging pad to charge. Although wireless charging is slower than wired charging, wireless charging is simpler and faster to a certain extent. Wouldn't it be particularly interesting to apply this technology to our new energy vehicles?

Recently, the National Standards Management Committee has released four national standards for wireless charging of electric vehicles. It mainly specifies some technical requirements, performance requirements, functional requirements, safety requirements, etc. for electric vehicle wireless charging systems in public and private applications.

Nio has already applied for a national patent for a vehicle wireless charging system on April 16 this year. This system mainly includes a charging transmitting device, a charging receiving device, a first driving device, a second driving device, a control device, and a vehicle collection device.

The wireless charging methods currently used at home and abroad are to install an energy receiving device on the vehicle chassis and an energy transmitting device on the ground to generate an alternating magnetic field through an alternating current of a certain frequency. The overall principle is similar to wireless charging of mobile phones. But in fact, this transmission method has low efficiency and high cost. More importantly, the magnetic field will generate a ring current in the ring conductor in the car. NIO’s patent information shows that the wireless charging system it invented can effectively reduce the ring current generated by ring conductors. As for the effect, we still don't know.

Friends who have used wireless charging on mobile phones should know that wireless charging of mobile phones will cause the phone to heat up, so many friends do not like to use wireless charging. In fact, this is because during the operation of the wireless charging system, various losses will be dissipated in the form of heat. This is especially true for the high power of wireless charging in cars. In the accessible parts of the system, the higher temperature can scald cats and dogs at worst, or ignite fallen leaves and branches at worst. Especially when the car's receiving coil is not completely aligned with the ground charging transmitting module, the heating phenomenon in wireless charging will be more serious. In addition, the safety issue of electromagnetic radiation is also a major test. When the wireless charging system is working, whether the electric field intensity and magnetic induction intensity are safe. Especially in large parking lots, what will happen if hundreds of wireless charging systems work at the same time?

In addition to these problems, wireless charging also faces the problem of excessive cost. At present, mainstream car companies such as SAIC Roewe, BAIC New Energy, and BYD are also conducting research and development tests on wireless charging of electric vehicles. Although there is currently no mass-produced model in China that supports wireless charging, I think it will be coming soon. Wireless charging is an important prerequisite for driverless driving in the future. Imagine that in the future we can get out of the car after arriving at the destination, and the vehicle will park itself in the parking space and automatically charge to prepare for the next trip.

This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.