Model-Based Optimization of a Series-Hybrid High-Performance Vehicle Powertrain with Hybrid Energy Storage System

The necessity to move towards a more sustainable mobility calls also for more efficient high-performance vehicles, which still fulfill dynamic requirements, namely, fast accelerations and limited weight. This study addresses the problem of series-hybrid powertrain mass minimization; the paper proposes sizing methodologies suitable to determine the combination of any number of primary storage systems (such as batteries and supercapacitors) that is optimal in terms of mass. The application of such methodologies indicates that it is possible to realize storage systems of about 33 kg and suitable to satisfy the power and energy requirements characterizing a representative mission profile, while achieving fuel savings in excess of 20% with respect to the ICE-only architecture.