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Battery Operations for the TET–1 Spacecraft

Balan, Arvind Kumar and Müller, Kay (2014) Battery Operations for the TET–1 Spacecraft. In: SpaceOps 2013 - 13th International Conference on Space Operations. SpaceOps 2014 - 13th International Conference on Space Operations, 05.-09. May 2014, Pasadena, California, USA.

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Abstract

The TET–1 satellite serves as a technology demonstrator within the On-Orbit Verification (OOV) program with the goal of providing German space companies and research institutions with the opportunity to test their equipment on actual spacecraft. It was launched on July 22, 2012, by a Russian Soyuz/Fregat into a Sun-synchronous Orbit with an LTAN of 11:27 UTC. The satellite is powered by nickel-hydrogen batteries during eclipse. The operations team became aware of several issues shortly before and after the launch which created some challenges for battery operation. Some battery cells had undergone reversal prior to launch which seems to have created an imbalance between them. Also, the overall temperature within the satellite and that of the batteries turned out to be higher than predicted and the battery voltage slightly exceeded the limit for payload operations. This paper describes in detail the circumstances in which these issues arose, wherever possible their causes and how they were dealt with. The capacity of the TET–1 spacecraft’s batteries is found to have increased from 12 Ah to about 14 Ah without any significant increase in temperature. Data gained at a later point in time also suggest a positive effect of the reconditioning.

Item URL in elib:https://elib.dlr.de/89725/
Document Type:Conference or Workshop Item (Lecture)
Title:Battery Operations for the TET–1 Spacecraft
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Balan, Arvind KumarArvind.Balan (at) dlr.deUNSPECIFIED
Müller, KayKay.Mueller (at) dlr.deUNSPECIFIED
Date:5 May 2014
Journal or Publication Title:SpaceOps 2013 - 13th International Conference on Space Operations
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:TET-1, Nickel-Hydrogen Battery, Satellite operations, Power and Thermal System, Temperature, Low earth orbit
Event Title:SpaceOps 2014 - 13th International Conference on Space Operations
Event Location:Pasadena, California, USA
Event Type:international Conference
Event Dates:05.-09. May 2014
Organizer:NASA Jet Propulsion Laboratory
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - TET OOV Support
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training > Mission Operations
Deposited By: Balan, Arvind Kumar
Deposited On:09 Jul 2014 09:28
Last Modified:31 Jul 2019 19:47

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