From 2008 to 2022, from 3 to more than 800 vehicles, in 14 years, Beijing, the "city of the two Olympics", will usher in a "green Olympics". Only this time, in the field of transportation, the protagonist who adds luster to "green" has changed from lithium batteries to hydrogen.
The reporter recently learned from the Beijing Winter Olympic Organizing Committee that during the Winter Olympics, 816 hydrogen fuel cell vehicles will participate in the transportation service guarantee of the event. This is by far the world's largest demonstration application of hydrogen fuel cell vehicles.
The Winter Olympic hydrogen fuel cell bus operated by Beijing Bus Group runs in the Yanqing race area.
Among the 816 hydrogen fuel cell vehicles, in addition to the 247 Coaster and Mirai delivered by Japan's Toyota, the remaining more than 500 are independently developed and produced by Chinese auto companies. Among them, Beiqi Foton Ouhui delivered 497 vehicles, which are 9-meter, 11-meter and 12-meter buses.
"Through the demonstration application of this Winter Olympics, the key technologies of hydrogen fuel cell vehicles in China have made breakthroughs and have reached the world's leading level in some application scenarios." Yang Fuyuan, a professor at Tsinghua University's School of Vehicles and Vehicles, said.
There are three divisions of the Winter Olympic Games, namely Beijing, Yanqing and Zhangjiakou. Among them, the scenes in Yanqing and Zhangjiakou are mostly alpine mountains, with large slopes, many curves, harsh climatic conditions, and about 200 kilometers away from the center of Beijing, which poses great challenges to the low temperature resistance of the whole vehicle, as well as control and power output. In the face of the special application scenarios of the Winter Olympic Games, since 2018, the relevant scientific research teams have carried out targeted research and development.
"For example, the team enterprise Yihuatong has broken through the core technology of the stack, so that the bus can achieve a cold start within 120 seconds in an environment of -30 ° C." Liu Jihong, vice president of Foton Ouhui R&D and president of the Technology Research Institute, introduced that the advanced stack is combined with a self-developed power battery system to enable domestic hydrogen fuel cell buses to finally achieve "all-climate operation".
The Beijing Winter Olympic hydrogen fuel cell bus operates in an environment below minus 10 degrees.
In the face of the problem of electric drive in the environment of the Winter Olympics, another team enterprise, Science and Technology Huachuang, also handed over the answer sheet. Team leader Shi Junhui introduced that for the Winter Olympic environment, the company has developed a six-in-one integrated controller, a vehicle controller and a dual motor variable speed drive system without power interruption, forming a series of highly reliable and high environmental adaptability products, and successfully equipping hydrogen fuel cell buses to serve the Winter Olympics.
The sharp drop in winter mileage has always been a "heart disease" for new energy vehicles with power batteries. "The hydrogen fuel cell vehicles equipped with the Beijing Winter Olympics can completely overcome this." Liu Jihong revealed that one of the buses involved in long-distance operation has been equipped with the first high-pressure, high-reserve 70Mpa aluminum gall fiber fully wound composite cylinder system in China, with a driving range of more than 600 kilometers.
The large-scale demonstration application of hydrogen fuel cell vehicles, in addition to the manufacture of vehicles, also needs the improvement of related supporting infrastructure. At present, the hydrogen refueling stations in Yanqing and Zhangjiakou are ready, with several hydrogen refueling stations of 35Mpa and 70Mpa each, which can meet the hydrogenation needs of all Winter Olympic hydrogen fuel cell vehicles.
Beijing Winter Olympic hydrogen fuel cell bus in operation.
At the same time, the Beijing Bus Group, which is responsible for the operation of the Winter Olympic bus, has established a perfect hydrogen fuel data remote transmission and monitoring system. Sun Peng, senior engineer of the Science and Technology Information Department of Beijing Bus Group, introduced that the CAN bus data of hydrogen energy vehicles will collect data such as fuel stacks, hydrogen fuel systems, power batteries, drive motors, driver operations and instrument monitoring, and upload them according to the transmission rate of seconds. These data can not only monitor and dynamically manage the technical status of vehicle operation in real time, but also provide data support for the improvement of vehicle support in different roles and scenarios in the future.
"The Beijing Winter Olympics will allow China's technological breakthroughs in the field of hydrogen fuel cell vehicles to be displayed in a concentrated manner, providing a comprehensive platform for the verification and application of these technologies, and laying the foundation for further commercial promotion in the future." Yang Fuyuan said.