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NiCd cell reliability in the mission environmentThis paper summarizes an effort by Gates Aerospace Batteries (GAB) and the Reliability Analysis Center (RAC) to analyze survivability data for both General Electric and GAB NiCd cells utilized in various spacecraft. For simplicity sake, all mission environments are described as either low Earth orbital (LEO) or geosynchronous Earth orbit (GEO). 'Extreme value statistical methods' are applied to this database because of the longevity of the numerous missions while encountering relatively few failures. Every attempt was made to include all known instances of cell-induced-failures of the battery and to exclude battery-induced-failures of the cell. While this distinction may be somewhat limited due to availability of in-flight data, we have accepted the learned opinion of the specific customer contacts to ensure integrity of the common databases. This paper advances the preliminary analysis reported upon at the 1991 NASA Battery Workshop. That prior analysis was concerned with an estimated 278 million cell-hours of operation encompassing 183 satellites. The paper also cited 'no reported failures to date.' This analysis reports on 428 million cell hours of operation emcompassing 212 satellites. This analysis also reports on seven 'cell-induced-failures.'
Document ID
19930011321
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Denson, William K.
(Reliability Analysis Center Rome, NY, United States)
Klein, Glenn C.
(Gates Aerospace Batteries Gainesville, FL., United States)
Date Acquired
September 6, 2013
Publication Date
February 1, 1993
Publication Information
Publication: NASA. Marshall Space Flight Center, The 1992 NASA Aerospace Battery Workshop
Subject Category
Energy Production And Conversion
Accession Number
93N20510
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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