S. WEST, P.T. KREIN ,"Equalization of Valve-Regulated Lead-Acid Batteries: Issues and Life Test Results", IEEE, 2000, pp. 439-446

S. WEST, P.T. KREIN ,"Equalization of Valve-Regulated Lead-Acid Batteries: Issues and Life Test Results", IEEE, 2000, pp. 439-446 Copyright - [Précédente] [Première page] [Suivante] - Home

Article : [SHEET563]

Titre : S. WEST, P.T. KREIN ,Equalization of Valve-Regulated Lead-Acid Batteries: Issues and Life Test Results, IEEE, 2000, pp. 439-446

Cité dans :[THESE133] B. BIDOGGIA, Etude et réalisation de nouveaux convertisseurs connectant plusieurs sources d'énergies renouvelables au réseau, These de doctorat, septembre 2005 - aout 2008.
Cité dans : [DIV094]  Recherche sur l'auteur Philip T. KREIN, juillet 2007.
Cité dans : [DATA226] T. LEQUEU, Recherche sur les BATTERIES et ACCUMULATEURS, mai 2019.

Auteur : Sean West
Auteur : Philip T. Krein

Adresse : Dept of Electrical and Computer Engineering - University of Illinois at Urbana-Champaign - 1406 W. Green St. - Urbana, IL 61801 USA
Lien : mailto:krein@ece.uiuc.edu
Info : Référence ART181 chez Benoit BIDOGGIA
Source : IEEE
Date : 2000
Pages : 439 - 446
Lien : private/West-01.pdf - 8 pages, 779 Ko.

Vers : Bibliographie

Abstract :
The importance of state-of-charge (SOC) balance, or equalization,
is well known. Results of accelerated life testing are presented to
evaluate equalization requirements and to compare passive and ac-
tiveequalization approaches for valve-regulated lead-acid (VRLA)
batteries. In both heavy cyclingduty and high-temperatureduty, bat-
tery degradation appears very early during expected life in the ab-
sence of equalization. The degree of equalization is critical: results
show that voltage differences should be held to less than 15 mV/cell
toprevent SOC separation in repeated cycling. The tests confirm that
conventional overcharge-based passive equalization is effective for
VRLA batteries-if there is sufficient time to ensure SOC matching
among cells. Most proposed active voltage equalization methods in
effect transfer the problem of SOC matching to external voltage
matching of sensors and magnetic elements. Matching at the
15 mV/cell level is costly. A switched-capacitor approach has been
identified that avoids this limitation. Test results show that switched-
capacitor equalization is useful, particularly when the series string
is too long to support enough time for passive equalization.

Bibliographie

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