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An update on the performance of Li-ion rechargeable batteries on Mars rovers

Show simple item record Ratnakumara, Bugga V. Smart, M. C. Whitcanack, L. D. Chin, K. B. Ewell, R. C. Surampudi, S. Puglia, F. Gitzendanner, R. 2006-09-22T16:24:12Z 2006-09-22T16:24:12Z 2006-06-26
dc.identifier.citation 4th International Energy Conversion Engineering Conference, San Diego, California, June 26-29, 2006. en
dc.identifier.clearanceno 06-1597
dc.description.abstract NASA’s Mars Rovers, Spirit and Opportunity have been exploring the surface of Mars for the last thirty months, far exceeding the primary mission life of three months, performing astounding geological studies to examine the habitability of Mars. Such an extended mission life may be attributed to impressive performances of several subsystems, including power subsystem components, i.e., solar array and batteries. The novelty and challenge for this mission in terms of energy storage is the use of lithium-ion batteries, for the first time in a major NASA mission, for keeping the rover electronics warm, and supporting nighttime experimentation and communications. The use of Li-ion batteries has considerably enhanced or even enabled these rovers, by providing greater mass and volume allocations for the payload and wider range of operating temperatures for the power subsystem and thus reduced thermal management. After about 800 days of exploration, there is only marginal change in the end-of discharge (EOD) voltages of the batteries or in their capacities, as estimated from in-flight voltage data and corroborated by ground testing of prototype batteries. Enabled by such impressive durability from the Li-ion batteries, both from a cycling and calendar life stand point, these rovers are poised to extend their exploration well beyond 1000 sols, though other components have started showing signs of decay. In this paper, we will update the performance characteristics of these batteries on both Spirit and Opportunity. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 822005 bytes
dc.format.mimetype application/pdf
dc.language.iso en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2006. en
dc.subject Mars Rovers en
dc.subject Li-ion batteries en
dc.subject low temperatures en
dc.subject cycle life en
dc.title An update on the performance of Li-ion rechargeable batteries on Mars rovers en
dc.type Preprint en

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