Author : Hossein Bavarsad

HEVs are seen by some researchers as a very promising near-term technology for improving fuel economy and
reducing emissions, particularly for Sports Utility Vehicles (SUVs). Proponents also argue that HEVs can provide
improved performance for the customer and, in contrast to other advanced-technology vehicles, require no extensive
new infrastructure. With many of the advantages but without the range limitation of electric vehicles, HEVs could
have broad customer appeal. The modeling and simulation of vehicles is an essential stage in the design process.
Early design stages focus of energy-modeling, where many component dynamics are ignored and the models only
compute the energy flow through the models. This paper focuses on HEVs, compare them with other transporting
technologies, modeling and simulations of subsystems that are unique to hybrid electric vehicles, the battery, electric
machine, and inverter. The differences in fuel consumption, simulation time, battery SOC and battery capacity loss
were analyzed and compared. The causes of the differences were determined, and the impact of each model fidelity
was systematically and objectively evaluated.

Keywords: Vehicle design; energy; battery; hybrid; modeling