YB: The qualification tests performed on both engineering model (EM) and quarter-max (QM) batteries demonstrated that the design fit the requirements. AMD: How did Saft’s batteries fit the specs for the operation? The battery energy Saft delivered for OG2 ensured the required lifetime of five years. The flight models were delivered to SNC on time for acceptance and satellite integration tests. They were permitted to validate by testing all the compliance to all the mission requirements, mainly the thermal and mechanical behavior. As part of the program, two engineering models and one qualification model were built. To adapt to the major constraints, the two 8S3P battery blocks already designed and qualified were placed onto a mechanical structure, positioning the blocks vertically using the bracket. The main constraint for the battery pack was the footprint. The battery design was adapted to the OG2 plate-form needs and requirements. OG2 satellites on pallets at Sierra Nevada Corp. This stringent qualification program – including electrical performances characterization, mechanical with high level vibration and shock testing, thermal vacuum evaluation, safety test, and long term cycle-life tests – aims to demonstrate the capability of the cell to meet the harsh space environments. The MPS cells have been qualified in the frame of the European Space Agency (ESA) flight program using the space standards. Since that time, the reliability of the MPS speaks for itself with more than 170 satellites launched, among them, the 17 OG2 satellites. Yannick Borthomieu: The electrochemistry of the MPS cells was issued from Saft’s research in early 2000. AMD: Can you describe the research and development behind the batteries for the ORBCOMM satellites? The low-thermal power and high-energy efficiency of the batteries enables the installation of smaller solar panels and battery radiators to further reduce the satellite’s critical weight.Īerospace Manufacturing & Design sat down with Yannick Borthomieu, Saft space and defense product manager of France, to discuss the research, design, and implementation of the LEO satellite constellation batteries for the ORBCOMM satellites. Chosen for their low-weight and high-voltage capabilities, the batteries reduce satellite battery weight by 50% on average, allowing the OG2 satellites to carry a larger payload. In order to keep ORBCOMM’s LEO satellites small, the technology was developed to operate with significantly lower power levels, requiring smaller batteries than geostationary (GEO) satellites. Providing 30Ah with 28V, the battery will power the satellite for up to 35 minutes during portions of the orbit when the satellite is blocked from sunlight. Saft’s high energy battery for satellites.Įach satellite uses one Saft battery pack containing MPS176065 cells. The OG2 constellation is a network of 17 LEO satellites that provide machine-to-machine (M2M) wireless communications to and from anywhere in the world. (SNC), which has a multi-million-dollar contract with Saft to provide 18 of its 8S6P medium prismatic satellite (MPS) batteries. The ORBCOMM O2 satellites are designed, manufactured, and integrated by Sierra Nevada Corp. In both missions, the satellites were powered by Saft’s low-Earth orbit (LEO) satellite constellation batteries. Following the successful launch of six machine-to-machine wireless communication ORBCOMM OG2 satellites in 2014, 11 more ORBCOMM satellites were launched via Cape Canaveral’s SpaceX Falcon 9 rocket in December 2015.
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