Ultracaps buffer fuel cell power supply for buses

October 20, 2020 //By Nick Flaherty
Skeleton in bus graphene ultracapacitor deal
Skeleton Technologies is to supply its curved graphene ultracapacitors to power hydrogen buses built in Northern Ireland by Wrightbus

German power technology developer Skeleton Technologies is working with Wrightbus to integrate its ultracapacitors into hydrogen powered buses.

This is the first commercial release of Skeleton’s next generation high energy ultracapacitors based on a customised version of graphene that the company says provides the highest power density in the market, twice that of the closest competitors, including Tesla. A deal with Wrightbus for the first generation ultracapacitors was announced back in 2018 but the bus maker went into administration last year.

Hybridization of fuel cell vehicles with ultracapacitors reduces the stress on fuel cells and benefits the vehicles’ fuel economy, allowing them to function more efficiently and increasing the overall range of the system.

“Since fuel cells are not able to recuperate the braking energy and re-use it for acceleration, they need efficient energy storage devices to improve overall system efficiency and total cost of ownership,” said Taavi Madiberk, CEO and co-founder of Skeleton Technologies. “Combining ultracapacitors and fuel cells will speed up the market adoption of hydrogen fuel cell vehicles. Wrightbus is at the forefront of development of hydrogen vehicles and we are very excited to work with one of the most ambitious companies in the sector. We see a clear potential of 1000 buses in the next 5 years. Based on the technology and its underlying economics, we have reason to believe that all hydrogen powered trucks and buses could eventually adopt our products.”


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