Battery/Ultracapacitor System for Small EVs – Using an NEV as the target vehicle, researchers from the Illinois Institute of Technology and Allborg University (Denmark) are working on a hybrid system that combines a battery pack with an ultracapacitor. The battery handles average power loads while the ultracapacitor handles peak loads.
The target NEV has a speed limit of 40-50 km/h (25-31 mph), maximum power of 40 kW, and a weight of about 800 kg. The battery pack comprised two parallel strings of 14 series-connected 12 V NiMH batteries (Saft NHE 10-100). The ultracapacitor was a Maxwell BMOD0063 module with a nominal voltage of 125V.
Bi-polar Lead Acid Battery For EVs – Last week a partnership between University of Glamorgan (Wales) and Atraverda was announced for the purpose of developing bi-polar lead acid batteries for a variety of commercial markets including EVs. Atraverda has expertise in conductive ceramics that would be used in the batteries. Prototypes are expected to begin testing within a year.
The partners say their work could lead to lead-acid batteries that are up to 40% lighter, 20% smaller, have 40% more energy capacity and twice the lifespan of traditional lead acid batteries.