Transit and Ultracapacitors

21 October 2009 - 1:00pm

Ultracapacitor batteries are a poor fit for domestic cars, but are a unique fit for transit. Michael Graham Richard looks at how this technology is working on electric buses in China.

Ultracapacitors can be quickly charged and discharged, and can stand up to an unlimited number of cycles.

"The trick is to turn some bus stops along the route into charge stations, says Dan Ye, executive director of Sinautec [MAKER OF THE CHINESE BUSES]. Unlike a conventional trolley bus that has to continually touch an overhead power line, Sinautec's ultracapacitor buses take big sips of electricity every two or three miles at designated charging stations, which double as bus stops. When at these stations, a collector on the top of the bus rises a few feet and touches an overhead charging line. Within a couple of minutes, the ultracapacitor banks stored under the bus seats are fully charged. [...]"

Source: Treehugger, October 19, 2009
Bookmark and Share
There is lots of theory, and lots of wonderful mathematics, and even lots of dealmaking. But the financial engineers are not real engineers who take responsibility for the bridges that fall down. They have no notion of a safety factor.