NDLI: Eutelsat II Nickel-hydrogen Storage Battery System Design And Performance Summary

Content Provider	IEEE Xplore Digital Library
Author	Duff, P.
Copyright Year	1990
Description	Author affiliation: Eagle-Picher Industries, Inc. (Duff, P.)
Abstract	The Eutelsat II Nickel-Hydrogen Battery System was designed for Aerospatiale to supply electrical energy for pre-launch launch, transfer and geosynchronous orbit including solar eclipses and peak load operations. The Nickel-Hydrogen battery system was selected to support this mission primarily due to long life and high energy density characteristics and successful spaceflight heritage. This paper will outline details of the cell and battery design, battery electrical performance, and summarize the results of qualification/acceptance testing performed at Eagle-Picher Industries (EPI). The Eutelsat II Battery System designated as the SAR-10009 battery consists of twenty-seven hermetically sealed nickel-hydrogen cells electrically connected in series. The cells are mounted in aluminum sleeve assemblies which are in turn mounted directly to an aluminum base plate. This battery systern provides two main power outputs (power bus and pyro bus) and features three thermal sensors, two system control heating elements, resistive grounding, insulated captivated mounting provisions, individual cell bypass diode circuitry for open circuit protection, redundant electrical insulation, conformal coating, and three electrical interface connectors. The cell technology used is basically Intelsat design with high porosity sinter positive electrodes, gas barrier separators, and a modified activation procedure, designed to stabilize electrolyte concentration. The battery assembly delivers a typical capacity of 70 amp hours when charged at 5.8 amps for 20 hours at 1011 C and discharged at 40 amps until the first cell reaches one volt or the battery voltage reaches 27 volts. The battery package occupies a maximum volume of 60 x 45 x 27 cm and boasts a mass of only 48.6 KG maximum. The Engineering and Qualification models have been manufactured, fully space qualified and are presently undergoing satellite level integration testing at Aerospatiale in Cannes, France. The first flight model hardware was completed and shipped in February 1990 and now awaits a projected late summer 1990 launch. The second flight set is also complete and is to be shipped soon.
Starting Page	79
Ending Page	84
File Size	303011
Page Count	6
File Format	PDF
ISBN	0816904901
DOI	10.1109/IECEC.1990.748033
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-08-12
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Batteries Testing Assembly Aluminum Qualifications Dielectrics and electrical insulation Circuits Electrodes Particle separators Aerospace engineering
Content Type	Text
Resource Type	Article

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