lithium-ion battery systems for satellites optimised solutions for advanced applications september 2008
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advanced batteries for industry the widest experience on earth saft is the world s leading manufacturer is a global multi-technology battery specialist and is the world s saft of high-end batteries for multiple industrial transportation and defence applications leading manufacturer of high-end batteries for industrial transportation in space proven expertise over 40 years has consolidated our space and defence applications position as the pre-eminent supplier of choice for contractors with the benefit of first-class research and manufacturing facilities pioneering today s satellite technologies saft s lithium-ion is extending the capability of today s sophisticated marine vehicles and systems saft is working proactively with navies shipyards and oems worldwide transforming the limitations of conventional technologies into powerful new possibilities for the future batteries for satellites saft knows how saft has gained significant experience in space and has played a pivotal role in th
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saft in space a trusted supplier for satellites many high-end fully integrated saft systems are in service currently ves and mps offer specific energy to 165 wh/kg and saft s modular concept enables the needs of multiple geo meo and leo mission profiles to be met geo/meo missions leo · missions · telecoms · meteorology · communications security or emergency service deep space probes missions · lunar · mars · exploration · rendez-vous benefits to customers · global navigation benefits to customers · earth remote sensing · military · scientific or technological demonstration · · knowledge of battery status · low mass and volume long life 5 years storage 2 years integration and 18 years in orbit benefits to customers · low mass and volume · integrated simplified electronics · long life missions up to 12 years · low mass and volume · highly customised solutions meo leo geo 3
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geo/meo missions in geosynchronous earth orbit geo and middle earth orbit meo satellite orbits address different applications and use different payloads saft has developed a unique range of cylindrical products that suit both types of satellite the modular approach to building space battery systems is central to meeting various geo/meo mission requirements ves battery architecture the modularity is realized both for parallel and serial assemblies 1 parallel assemblies called cell packages xp comprise 1p to 12p relative to capacity requirement · xp x is the number of cells connected in parallel · cell package structures are specially designed to receive all cell ranges · from 1p to 12p cell packages have been developed and are qualified providing significant cost advantages 2 serial assembly called battery 2p modules are electrically and mechanically adapted to meet the bus voltage requirements · ys y is the number of cell packages connected in series · s range from 2 7.2 v to 13 46.8
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leo missions low earth orbit leo satellites operate between 100 1000 km from earth responding to ground station contacts for a very wide variety of civil military and scientific needs including radar observation telecom optical saft has been involved in the development of battery systems for nano micro and mini satellite platforms worldwide because li-ion is significantly lighter and more compact than conventional alkaline ni-cd ni-h2 batteries cost-efficient solutions can be achieved to make viable smaller scale missions of shorter duration systems will be configured for mission durations typically of between 3 12 years mps battery architecture s-p series-parallel architecture simplified balancing system per cell resistor cell with overcharge protection device that protects the battery in case of cell failure within the string battery management with battery voltage maintenance of the battery voltage in case of cell failure mps cells battery modules are available from 1
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optimised design space electronic device tailored to specific needs the by-pass principle should li-ion cells or cell packages connected in series weaken they are removed automatically from the serial circuit via a built-in by-pass switch this operation limits other possible effects caused by the imbalance in the system as satellite technology has evolved saft has built on 10 years of market and product experience to create li-ion energy storage systems offering even higher levels of performance our fully integrated `all-in-one modular package combines electronics and electrochemistry to provide a system with intelligent autonomous cell balancing management optimised for easy installation and instant operation the system functions include saft li-ion model slim calculate optimum solutions predict future performances saft uses its macroscopic electrochemical model slim in support of geo meo and leo satellite manufacturers to find the best solutions through prediction of future ves and
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powerful solutions positive ink mixing negative ink mixing breaking new ground in space the saft concept modular scalable battery systems using saft s manufacturing process cells built on large cost-efficient manufacturing lines are configured to drying positive strip negative strip coating positive powders negative powders meet precise market requirements dedicated space li-ion cylindrical and prismatic cells have performance profiles ideally suited to meet intensive charge/discharge cycles experienced in flight durations of up to 18 years electrode electrode calendering slitting cutting cells are mechanically and electrically assembled into modules or customised battery systems including electronic devices to govern performance thermal and safety management winding cylindrical jelly roll assembly in can an investment in quality for the present for the future saft s experience continues to grow wide exposure to real operations in the field valuable customer and operator feedback and s
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about saft saft is a world specialist in the design and manufacture of high-tech batteries for industry saft batteries are used in high performance applications such as industrial infrastructure and processes transportation space and defence saft is the world s leading manufacturer of nickel-cadmium batteries for industrial applications and of primary lithium batteries for a wide range of end markets the group is also the european leader for specialised advanced technologies for the defence and space industries with approximately 3,800 employees worldwide saft is present in 18 countries its 15 manufacturing sites and extensive sales network enable the group to serve its customers worldwide saft specialty battery group 12 rue sadi carnot 93170 bagnolet france tel +33 01 49 93 19 18 fax +33 01 49 93 19 69 rue g leclanché b.p 1039 86060 poitiers cedex 9 france tel +33 05 49 55 48 57 fax +33 05 49 55 47 80 107 beaver court cockeysville maryland 21030 usa tel 1 410 771 32 00 fax 1 410
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