Travail de fin d'études et stage[BR]- Travail de fin d'études : The Eco-Driving of the Electric Vehicle - Loss analysis in the drivetrain[BR]- Stage d'insertion professionnelle

Abstract

The objectives of this master's thesis cover theoretical and practical aspects. The final goal is to estimate the energy consumption of a popular modern electric vehicle through several case studies in order to provide eco-driving tips. Three case studies are investigated, all of them being inspired by the everyday life of a driver: a trapezoid speed profile in urban conditions, a traversing of a hill on a highway segment and a turn between two straight road segments in extra-urban conditions. To provide energy consumption quantification, different power loss maps are generated based on data measurements published in the literature. The physical origin of the different power losses in the drivetrain, from the wheel to the battery, are discussed in depth. In order to estimate the power losses of an electric vehicle along a given case study, the equation of motion of this vehicle is necessary to be considered. Indeed, the rolling resistance, the aerodynamic drag and the grading resistance are deeply discussed with their physical origins and then quantified.

Concerning the practical part, for instance for the trapezoid profile speed, it turns out that the minimum energy consumption of the Nissan Leaf is 42.11 Wh for 500 m at 35 km/h of mean speed. By comparison to the announced energy consumption by the manufacturer, the results obtained from the simulation tool, developed using MATLAB, indicate a good confidence in the tool. Further studies can tackle other case studies, even a combination of some of them. Also, a focus can be set on a dedicated vehicle.