NDLI: In service experience of VRLA batteries used for bulk powering of telecommunications equipment in outside plant

Content Provider	IEEE Xplore Digital Library
Author	May, G.J. Lodi, G. Shaffer, D.
Copyright Year	2002
Description	Author affiliation: FIAMM SpA, Italy (May, G.J.; Lodi, G.)
Abstract	Some years ago there was a significant change in the power requirements for outside plant which lead to the bulk powering of telecommunications equipment. Bulk powering has substantially increased the number of power equipment alternatives for both power conversion and energy storage and the need for more compact installations has increased. This has lead to the development of new battery configurations to further optimise energy density, reduce the space utilized and facilitate installation and maintenance. Two particular types of bulk power installation using VRLA batteries developed by FIAMM are described. The effects of ambient temperature, the number of parallel strings, temperature compensation and battery spacing are described in relation to recently gathered data on field service based on a surveillance programme of full discharge testing. The batteries all used absorptive glass mat separators and state-of-the-art electrochemical designs and are well-adapted to the required duty cycle. The batteries have been installed in remote terminals that are now environmentally controlled but were not controlled for more than half the period in service. Tests have been carried out after several years in service and are reported in detail. The overall results show good behaviour after 6 to 7 years of actual service and the design fife of the cells will be readily achieved. Installation design is a key factor and the relation between battery design and configuration at monobloc level with the total battery is considered. Further tests are ongoing and the data generated by this study will serve to demonstrate the effectiveness as well as pointing to improvements of these battery types and configurations in service in an outside plant environment.
Sponsorship	Power Electron. Soc. IEEE
Starting Page	61
Ending Page	65
File Size	311482
Page Count	5
File Format	PDF
ISBN	0780375122
DOI	10.1109/INTLEC.2002.1048635
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-09-29
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Batteries Life testing Temperature Glass Particle separators Life estimation Containers Welding Switches Telecommunications
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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