Sizing of Autonomy Source Battery–Supercapacitor Vehicle with Power Required Analyses

Author:

Lopes Juliana1,Pomilio José Antenor1ORCID,Ferreira Paulo Augusto Valente1

Affiliation:

1. Department of Energy and Systems, School of Electrical and Computer Engineering, Universidade Estadual de Campinas (UNICAMP), Campinas 13083-852, Brazil

Abstract

The combined use of batteries and supercapacitors is an alternative to reconcile the higher energy density of batteries with the high power density of supercapacitors. The optimal sizing of this assembly, especially with the minimization of mass, is one of the challenges of designing the power system of an electric vehicle. The condition of the unpredictability of the power demand determined by the vehicle driver must also be added, which must be met by the power system without exceeding safe operating limits for the devices. This article presents a methodology for minimizing the mass of the electrical energy storage system (ESS) that considers the various aspects mentioned and a variety of battery technologies and supercapacitor values. The resulting minimum mass dimensioning is verified by simulation for different driving cycles under conditions of maximum power demand. The system also includes a tertiary source, such as a fuel cell, responsible for the vehicle’s extended autonomy. In addition to sizing the ESS, the article also proposes a management strategy for the various sources to guarantee the vehicle’s expected performance while respecting each device’s operational limits.

Funder

Sao Paulo Research Foundation

Brazilian National Research Council

Publisher

MDPI AG

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