If a car is going to use a series hybrid or extended range EV powertrain a a conventional piston engine is hardly the optimal package for a range extender. Something smaller and more power dense would be preferred. A small turbine engine is one possibility and that's exactly the approach taken by Langford Performance engineering. They've used a micro-turbine from California-based Capstone Turbine. A turbine works well in this type of application because it can run at constant speed.
The lithium titanate batteries by Altairnano has been tried in powerstations, trucks and even a dragster and will soon have the opportunity to prove their metal in a hybrid bus application. The company has announced that they have received an order for four demo battery packs by the innovative bus maker Designline International, who will shell out a hefty $540,000 for this initial order. While one of the 44 KWh packs will be used for modular testing, the other three will be installed in Ecosaver
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