PERAMALAN KAPASITAS BATERAI PADA KENDARAAN LISTRIK DENGAN METODA COULOMETRI

Abstract

This article proposes a new coulometric approach to calculate the state of charge of a lead acid battery in electric vehicles. The main existing state of charge algo-rithms have two maior defects; a state of charge definition not adapted to electric vehicle applications and the nanoptimal use of static performance of the accumulator to estimate its state under dynamic stresses. ln order to improve these two weaknesses, we propose a new coulometric algorithm linked to the performance of the electric vehicle and where the ampere haurs virtually discharged are obtained by applying statistica/equivalence coefficients to the real curent profile. The evaluation of this new algorithm on real discharges reveals a significant improvement with less than 5% errors in all cases studied.