The "863" Electric Vehicle Major Project, a key initiative under the national high-tech research and development program, was successfully completed by Professor Li Liansheng and his team from the National Engineering Research Center for Fluid Machinery and Compressors at Xi'an Jiaotong University. The project was officially reviewed and accepted by an expert panel organized by the Ministry of Science and Technology in Beijing on December 24th. This achievement marks a significant step forward in China's efforts to develop advanced electric vehicle technologies.
Fuel cell technology is at the heart of fuel cell electric vehicles (FCEVs) and remains one of the most promising areas of global technological innovation. A critical component of this system is the fuel cell-specific air compressor, which plays a vital role in maintaining efficient operation. These compressors must meet stringent design requirements, including oil-free lubrication, compact size, lightweight construction, variable speed performance, and rapid response to changes in stack parameters.
Drawing on international research trends and considering China’s unique conditions and the specific demands of the "863" project, the research team explored two main compressor designs: scroll and screw types. They conducted detailed thermodynamic and dynamic analyses of the oil-free compressors, developed mathematical models for the compression process, and evaluated factors that influence volumetric efficiency and overall system performance. Additionally, they proposed sealing strategies and friction-reduction techniques to enhance reliability and efficiency.
Following the initial prototype development, extensive testing, iterative improvements, and performance evaluations were carried out. The results demonstrated that the compressors met the project’s specifications. The prototype was then tested by the Dalian Institute of Chemical Physics, part of the Chinese Academy of Sciences, confirming its compliance with technical standards.
The scroll-type air compressor designed for a 50 kW fuel cell engine and the screw-type compressor for a 100 kW engine are both independently developed, featuring full intellectual property rights. These compressors operate without any lubricating medium, ensuring high gas purity. Moreover, water generated as a byproduct of the fuel cell reaction can be used as a cooling agent, significantly improving compression efficiency.
Throughout the project, three patent applications were submitted, with one granted and two utility model patents approved. A total of eight graduate students contributed to the research. Key participants included Professor Xing Ziwen, Professor Shu Pengcheng, Dr. Zhao Yuanyang, Dr. Wu Huagen, Senior Engineer Bu Gaoxuan, Associate Professors Li Zhiwen and Wang Zhizhong, Lecturer Zhang Wei, technicians Ming Chenghui and Song Huxin, as well as graduate students Li Jianfeng, Yang Qichao, Gao Xiguang, Hui Dengfeng, and Yuan Qiang. Tongji University and Shanghai Aninda Drive Technology Co., Ltd. also played important roles in simulation testing and DC permanent magnet motor research.
The expert review panel concluded that the project fulfilled all contractual obligations and achieved the required technical performance. They acknowledged the progress made in developing key air compressor technologies and unanimously approved the project’s completion. They also recommended further noise reduction, increased output capacity, and continued efforts to achieve even greater advancements in the field.
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