Recently, the "**" of China's high-speed rail standard "going out" has landed, and urban rail transit is also stepping up to keep pace. The new energy rail transit lithium battery energy storage system developed by Beijing Jiaotong University National Energy Active Distribution Network Technology R&D Center (hereinafter referred to as “R&D Centerâ€) has already left the country and moved to Austria and New Zealand.
At present, urban rail transit is mostly powered by the power grid, and the wire “takes the nose to runâ€. The new energy rail transit lithium battery energy storage system is equivalent to “loading power†to the rail train, allowing it to operate off-grid offline.
“Taking the Beijing trolleybus as an example, there are many investments required for power grid construction, and it will affect the urban landscape. The most important thing is to reduce energy efficiency. In addition, the vehicle is limited by the operation road map, and only some energy can be recovered during braking.†Director of the center, Jiang Jiuchun, said.
The use of lithium battery energy storage system to drive urban rail transit is not only far more cost-effective than the construction of grid lines, but also can recycle energy during braking, which can increase energy efficiency by 30% and reduce the burden on the grid. In addition, lithium batteries are a more environmentally friendly alternative to nickel-cadmium batteries.
More practically, the lithium battery energy storage system allows the train to perform "emergency self-traction". "There will be a power outage in the subway, and the train stops in the track. But if the train with the lithium battery energy storage system can be dragged to the platform without electricity," Jiang Jiuchun introduced, "Emergency from The “skill†technology has a broad market space in the future. “By 2020, the mileage of light rail traffic is expected to reach more than 7,000 kilometers. At least 35,000 trains will run, and most trains will have this demand. â€
At present, the rail train equipped with the lithium battery energy storage system has been "on the job" in the tracks of Changchun, Guangzhou and Shenyang, and has "running" to go abroad. "Up to now, China's high-speed rail has basically entered a period of steady development, and the subway light rail is still in the early stage of development. The lithium battery energy storage system developed by our team has been at the forefront of the world. We have provided us for New Zealand and Austria. Research and development of energy storage systems." Jiang Jiuchun said.
It is understood that the R&D center has undertaken and participated in 90% of domestic rail transit new energy power system research projects, and has obtained a variety of lithium from light rail to subway, from rolling stock to EMU, from auxiliary power supply to traction power supply. The technical achievements of the battery system have achieved a number of international standards. For example, for the first time in the world, lithium batteries have been used as auxiliary power sources for high-speed EMUs, and hybrid electric drive and hybrid drive hybrid EMU battery systems have been developed. The R&D center represented China in the preparation of international lithium-ion battery test standards for railways and laid the technical foundation for the development of power battery standards for the railway industry.
But this is not the end. Jiang Jiuchun and his team still have a long way to go, such as improving energy efficiency, reducing costs, and extending the life of lithium batteries.
In addition, Jiang Jiuchun is providing industry standard recommendations for China Railway Corporation, hoping to strictly review the safety performance of lithium batteries entering the market. "The issue of safety is the first, let it never go wrong."
