发布时间：2025-07-09
At present, the research on static wireless charging systems for electric vehicles by domestic and foreign universities and research institutions is mostly at the engineering prototype stage. Major enterprises focus on providing solutions. There are still many problems to be solved in the industrialization and commercialization process of electric vehicle wireless charging technology.
The research on electric vehicle wireless charging products should rely on the latest scientific research achievements, strengthen the organic combination of industry-university-research, make full use of the cutting-edge core technologies mastered by major universities and research institutions, and exert the role of enterprises as the innovation entities to promote the transformation of scientific research results. This will help the commercialization process of static wireless charging technology for electric vehicles.
1. Foreign Research Results and Industrial Status
The universities and research institutions conducting research on static wireless charging technology for electric vehicles in foreign countries mainly include: Auckland University of New Zealand, Korea Advanced Institute of Science and Technology (KAIST), Oak Ridge National Laboratory (ORNL) of the United States, Utah University of the United States, Michigan University of the United States, Saitama University of Japan, and Tokyo University of Japan, etc.
The research mainly focuses on system modeling and control, magnetic coupling mechanism, compensation topology, anti-offset ability, electromagnetic leakage, and shielding, etc.
Among them, the research team of Auckland University has done a lot of work in the research of magnetic coupling mechanism and proposed a series of novel coil structures, effectively improving the performance of the magnetic coupling mechanism, and established a deep cooperation with Qualcomm Halo Company to develop a series of products;
The team of Korea Advanced Institute of Science and Technology in 2014 achieved a transmission power of 6.6kW at a 20cm transmission distance, with an overall efficiency of 95.57%, and proposed a coupling mechanism of large and small coils in the same year, greatly improving the anti-offset ability of the system, and applying the large and small coils to the wireless charging system of 5-15kW;
After successfully developing a 20kW electric vehicle wireless charging system in 2016, Oak Ridge National Laboratory of the United States announced the realization of a 120kW high-power wireless charging system in 2018, with an efficiency as high as 97%; The team of Professor Chris Mi of Michigan University of the United States in 2015 proposed a bilateral LCC compensation topology structure for electric vehicles, achieving decoupling of output current and load, and this topology has been widely applied.
In addition, many foreign companies and enterprises such as Qualcomm Halo, Evatran, Momentum Dynamics, WiTricity, HEVO POWER, ELIX of Canada, and Bombardier have also invested a large amount of financial and material resources in the research of electric vehicle wireless charging technology.
Among them, the Halo system of Qualcomm Company has achieved output power of 3.3-20kW, with an overall efficiency greater than 90%; The wireless charging system Drive 11 of WiTricity Company for pure electric vehicles and hybrid vehicles can provide a maximum output power of 11kW, with an efficiency of up to 93%, and in 2018, it cooperated with BMW Company to launch the world's first factory-equipped vehicle with wireless charging function - BMW 530e iPerformance, with a charging power of 3.6kW.
The ELIX Company of Canada has achieved an output power of 7.7kW using magnetic power coupling MDC technology; The PLUGLESS wireless charging system proposed by Evatran Company has also achieved power transmission of 3.6kW and 7.2kW, with device pricing of $5999 and $12999 respectively, and provides wireless charging support for Tesla Model S, BMW I3, Nissan LEAF, Chevrolet Volt and other models.
The Momentum Wireless Charging System proposed by Momentum Dynamics Company can achieve a maximum output power of up to 200kW and an efficiency of 95%. It has successfully been applied to the wireless charging of electric buses in collaboration with the American Link Transit Company. Additionally, on February 11, 2019, WiTricity Company announced the acquisition of some technical platforms and intellectual property from Qualcomm Halo Company. Previously, Qualcomm and WiTricity Company had been collaborating with international standard organizations. This acquisition will facilitate the standardization of the standards and accelerate the commercialization of wireless charging for electric vehicles.
Overall, major related enterprises abroad in the field of wireless charging for electric vehicles are at a relatively advanced level and have also made certain commercialization attempts.