BATTERY/SUPERCAPACITOR HYBRID SYSTEM FOR ELECTRIC VEHICLES

Carlos Armenta-Deu; Quentin Jach

doi:10.37591/joaea.v9i2.6424

Abstract

The paper is focused to the design and development of a new hybrid system to power electric vehicles. The system is made up of a conventional lithium battery that is used to propel the vehicle when there is no acceleration or the acceleration and power demand are low or moderate, and a supercapacitor that powers the electric vehicle at high power demand periods or when the acceleration is relevant. The system has been modelled and simulated for a Tesla model 3 to determine the improvement in the driving range when using the hybrid system in comparison with the conventional configuration of a single battery. The simulation has been previously verified comparing the results for the battery system to those provided by the manufacturer. The results of the simulation have shown the driving range is lower than expected because the energy recovering system has not been included in the calculation; applying a correction factor that takes into account the energy recovering the results of the simulation match the predicted driving range from the manufacturer data sheet, being in the upper range of the electric vehicle autonomy. Using the validated proposed methodology the simulation has been applied to the hybrid system, resulting in an extension of the driving range of 74 km, from an initial value of 472 km to a final one of 546 km, what represents an improvement of 15.7%. Using this improvement percentage and considering the energy recovering factor applies to the hybrid system as well as for the conventional battery equipped electric vehicle, the driving range can be extended up to 719 km, which represents a very long distance, enough to cover intercity trip distances.

Abstract

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