The three-year, $438K National Science Foundation GOALI (Grant Opportunities for Academic Liaisons with Industry) award will provide funding to develop a novel hybrid energy storage system for electric vehicles. The new system will be composed of a high energy-density battery pack, an ultracapacitor pack and a DC/DC converter. This new lightweight system will weigh less than a conventional high power-density battery pack alone. At the same time it will offer an increased battery lifetime. The new system will be developed, implemented and validated on the powertrain of a new electric car.