Energy gauge for lead-acid batteries in electric vehicles

Author

Caumont, O. ; Le Moigne, P. ; Rombaut, C. ; Muneret, X. ; Lenain, P.

Author_Institution

Ecole Centrale de Lille, Villeneuve d´´Ascq, France

Volume

15

Issue

3

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

354

Lastpage

360

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 algorithms have two major defects: a state of charge definition not adapted to electric vehicle applications and the nonoptimal use of static performance of the accumulator to estimate its state under dynamic stresses. In order to improve these two weaknesses, we propose a new coulometric algorithm linked to the performance of the electric vehicle and where the ampere-hours virtually discharged are obtained by applying statistical equivalence coefficients to the real current profile. The evaluation of this new algorithm on real discharges reveals a significant improvement with less than 5% errors in all cases studied

Keywords

electric vehicles; energy measurement; lead acid batteries; Pb; Pb-acid batteries; accumulator static performance; coulometric approach; dynamic stresses; electric propulsion; electric vehicles; energy gauge; energy measurement; lead-acid batteries; state of charge; statistical equivalence coefficients; Analytical models; Batteries; Electric vehicles; Electrodes; Energy conversion; Impedance measurement; State estimation; Stress; Vehicle dynamics; Voltage measurement;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.875503

Filename

875503