Maxwell Technologies announced the first commercial application of lithium-ion capacitors, developed in conjunction with China Railway Rolling Stock Corporation (CRRC-SRI), China’s largest rail manufacturer. The technology will be used for rapid energy regeneration for the Changsha Subway in the capital city of the Hunan province in China. Following last year’s announcement of Maxwell’s strategic partnership with CRRC-SRI to collaborate on developing next-generation capacitive energy storage solutions, this project is the first to leverage Maxwell’s new lithium-ion technology and validates its unique value proposition for rail applications.
CRRC-SRI will leverage lithium-ion capacitors for the Changsha Subway in Changsha, Hunan, as the single source of power for instant charging and discharging to propel the trolley. Lithium-ion capacitors can charge light rail vehicles in 30 seconds and keep them going for five to 10 minutes, ensuring the trolley will be able to restart quickly in constant stop-and-go traffic. The technology fulfills China’s rail requirements for energy savings and environmental protection.
Maxwell’s lithium-ion capacitors combine ultracapacitors’ high power density with lithium-ion batteries’ high energy density for onboard energy storage systems. Compared to traditional ultracapacitors, lithium-ion capacitors triple energy density and reduce the total weight of the energy storage system by 50 percent.
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