Research On Wireless Charging System For Electric Vehicles

With the constant consumption of fossil resources and the increasing environmental pollution,it is inevitable to develop electric vehicles for the automobile industry.As one of the hot spot of the current society,the combination of wireless charging and the electric car can solve the difficultyof the electric vehicle charging and the large land area of charging unit.The effects on the grid while many electric cars charging at the same time can be also solved.Radio transmission technology can realize the mobile charging and static charging of electric vehicles,so the development of wireless charging technology has a great effect on the large-scale promotion of electric vehicles.This paper studies the wireless charging system of electric vehicles,and the specific research contents are as follows.1.Firstly,the development status and research bottleneck of electric vehicles are introduced.Then the status quo of wireless charging technology for electric vehicles at home and abroad is summarized.To determine the research plan,the concept of wireless energy transmission technology and the main transmission methods are introduced.2.The various circuits used in the wireless charging system of electric vehicles are studied,the advantages and disadvantages of various circuits are analyzed,and the selected circuits are selected and compared,and the selected circuits are appropriately optimized according to the characteristics of the wireless charging technology of the electric vehicles.3.Aiming at the resonance system of the core of electric vehicle wireless charging technology,the model is simulated and simulated,and the coupling coefficient of the coil under the condition of coil spacing and horizontal offset is studied,and the appropriate coil model is selected.The simulation analysis of the wireless charging efficiency is performed after the coil model is selected.4.Research on the battery of the electric vehicle,which is the power source of the electric vehicle.Firstly introduces the battery evaluation system,analyzes the advantages and disadvantages of the common batteries on the market,and selects the battery type and the modeled data index according to the needs,based on the modeling data.Model and simulate the battery and analyze.5.The electric vehicle wireless charging system is builted and simulated,and the parameters of each link circuit are designed,and the waveform diagrams obtained at each link are analyzed.The obtained battery charging curve is the same as the expected charging curve,which proves that the design scheme is feasible.