According to the editor of the car wireless charging PCB, the most intuitive difference from wired charging is that when you reach the parking space, you don't have to get out of the car, pull out the charging gun and insert it into the charging port. In fact, this action will not bring energy to the electric car. Too many negative emotions can make people feel disgusted at most, that is, the fast charging pile charging gun is not light, and it takes some effort to plug and unplug. At the same time, the outdoor public piles are always dirty, but if you compare the current wireless charging Construction costs, this hard work may not be a big deal!

　　However, the optimization of wireless charging experience does not stop there, and there will be greater uses in the future, such as automation. Imagine the "parking memory parking" of Xiaopeng Motors. If this problem can be solved perfectly from regulations to technology one day, then the application scenario of wireless charging will really come, let the car drive you to the door of the mall/company , and then it drives to the underground parking lot and finds a free wireless charging position to charge itself. With this set of actions as "bait", countless people will rush to solve the cost problem.

　　What are the technical difficulties in realizing wireless charging?

　　According to the editor of the car wireless charging PCB, it is actually not difficult to realize wireless charging. The wireless charging technology of electronic products is very mature, but it is quite difficult to realize the wireless charging of automobile level.

　　The principle of wireless charging is not complicated. Basically, the transmitting end generates a changing magnetic field through a changing current, and the receiving end generates a current by inducing the changing magnetic field, but the problem is that the power is low and the distance requirements are relatively strict.

　　To realize the high-power wireless charging technology at the vehicle level, it is necessary to add a resonant network at the transmitter and receiver, and use a magnetically coupled resonance wireless power transmission system to boost the charging power. That is, low-power electrical appliances are mostly inductive, and high-power is usually resonant.

　　However, after solving the power problem, there is still a loss problem. One of the ideal conditions for wireless charging is that the devices should be close to each other. Once there is a relative distance, it will have a negative impact, but the chassis of the car is usually more than 100mm off the ground, and some SUV models even exceed 200mm. The charging power is greatly reduced.

　　In addition, we have such experience when using wireless charging of electronic devices, the positional relationship between the device and the charging board needs to be quite accurate, and sometimes even rotating the phone 180 degrees will cause the coil to be misaligned and unable to charge. This problem also exists in the wireless charging of electric vehicles. The relative position between the car end and the ground end coil even needs to reach centimeter-level accuracy. This also reminds us again that wireless charging and automatic parking seem to be a "best partner".

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