Hybrid Energy Storage To Increase Durability And Efficiency Of Hybrid Electric Vehicles.

Abstract

The addition of a short-term energy-storage system in conjunction with the battery to reduce fuel consumption, reduce emissions, and increase the service life of the battery is considered. A quasi-static simulation approach was used to simulate the models using the QuasiStatic Simulation Toolbox (QSS) developed by ETH Zürich. In order to compare results, a model was defined with similar specifications to a Toyota Yaris Hybrid, and similar fuel consumption results were achieved. A supercapacitor of about 5% of the battery size was chosen and implemented together with a power distribution controller. The supercapacitor was utilised as a power peak shaving solution to reduce the load on the battery in high demand instances. The proposed hybrid electric vehicle (HEV) model produced results with improved fuel consumption and emissions reductions of up to 23%, especially under urban conditions. This system also showed promise in increasing the life of the battery by reducing the charge cycles required to complete an urban drive cycle.