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Examination of VRLA cells sampled from a battery energy storage system (BESS) after 30-months of operations [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 2000.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
9 pages : digital, PDF file
Additional Creators:
Sandia National Laboratories, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Valve-Regulated Lead-Acid (VRLA) batteries continue to be employed in a wide variety of applications for telecommunications and Uninterruptible Power Supply (UPS). With the rapidly growing penetration of internet services, the requirements for standby power systems appear to be changing. For example, at last year's INTELEC, high voltage standby power systems up to 300-vdc were discussed as alternatives to the traditional 48-volt power plant. At the same time, battery reliability and the sensitivity of VRLAS to charging conditions (e.g., in-rush current, float voltage and temperature), continue to be argued extensively. Charge regimes which provide off-line charging or intermittent charge to the battery have been proposed. Some of these techniques go against the widely accepted rules of operation for batteries to achieve optimum lifetime. Experience in the telecom industry with high voltage systems and these charging scenarios is limited. However, GNB has several years of experience in the installation and operation of large VRLA battery systems that embody many of the power management philosophies being proposed. Early results show that positive grid corrosion is not accelerated and battery performance is maintained even when the battery is operated at a partial state-of-charge for long periods of time.
Report Numbers:
E 1.99:sand2000-1453c
sand2000-1453c
Subject(s):
Other Subject(s):
Note:
Published through SciTech Connect.
06/08/2000.
"sand2000-1453c"
Intelec 2000, Power Electronics Society of IEEE, Phoenix, AZ (US), 09/11/2000--09/14/2000.
JUNGST,RUDOLPH G.; SZYMBORSKI,JOSEPH; HUNT,GEORGE; TSAGALIS,ANGELO.
Funding Information:
AC04-94AL85000
View MARC record | catkey: 14100495