Capacitor type wireless charging system capable of receiving electric energy through tyres

Abstract

The invention discloses a capacitor type wireless charging system capable of receiving electric energy through tyres. The capacitor type wireless charging system comprises an electric energy receiving side apparatus mounted on the electric vehicle and multiple electric energy transmitting side apparatuses mounted on a road or under floor, wherein electric energy receiving polar plates are mounted in the corresponding tyres of the electric vehicle; through the electric field coupling among the electric energy transmitting polar plates mounted on the road or under floor, the electric energy can be transmitted from the electric energy transmitting polar plates on the ground to the electric energy receiving polar plates in the corresponding tyres in a high-frequency electric field way; and the vehicle-mounted battery pack can be charged through electric energy conversion. According to the capacitor type wireless charging system, the electric vehicle can be charged in the high-speed running process (in a dynamic wireless charging manner) or can be charged when the electric vehicle is stopped (in a static wireless charging manner). The capacitor type wireless charging system has the advantages of small size, high electric energy transfer capability, simple control, high overall efficiency, absence of magnetic field radiation and potential danger of fire, low cost, and the like.

Description

technical field [0001] The invention belongs to the technical field of wireless charging, and more specifically, the invention relates to a capacitive wireless charging system received by tires, which is applied to wireless charging of electric vehicles running at high speed or stopping. technical background [0002] With the development of electric vehicle technology, the problem of electric vehicle charging has become increasingly prominent, and has even become a key technical issue that limits the popularization of electric vehicles. The charging of electric vehicles generally adopts wired charging. However, wired contact charging is easy to wear, easy to get an electric shock, and may cause unreliable and inconvenient power transmission after repeated plugging and unplugging. Therefore, the development of wireless charging technology for electric vehicles is of great significance. Charging by wireless charging is not only convenient, but also beautiful, reducing the use...

AI Technical Summary

Problems solved by technology

In order to eliminate the fire hazard caused by metals falling on the ground (such as coins, chewing gum wrappers, cans, etc.), the electromagnetic induction wireless charging system is usually equipped with a metal detection device, which greatly increases the design cost

[0006] In summary, the disadvantages of inductive wireless charging include: 1. The receiving coil needs to be installed separately, which increases the weight of the electric vehicle and reduces fuel economy; 2. The transmission distance between the ground and the chassis is large, and the transmission efficiency is low; 3. Electromagnetic radiation is harmful to human tissues and central nervous system near electric vehicles, and fatal to animals located under the chassis of electric vehicles; 4. Electromagnetic radiation interferes with nearby electronic equipment; 5. It has fire hazards; 6. Metal detection needs to be designed separately device, high cost

[0009] However, since the capacitance of the plate capacitor is inversely proportional to the distance between the plates, for a distance between the plates of the capacitor of 100mm to 250mm (the distance between the chassis of the electric vehicle and the ground), the capacitance of the plate capacitor is very small, and the energy storage and transmission capacity is very large. Small, usually requires very high system operating frequency (>1MHz) and very large resonant inductance, greatly increasing the size and weight of the system

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