JPL Technical Report Server

Lithium-sulfur dioxide batteriess on Mars Rovers

Show simple item record Ratnakumar, B. V. Smart, M. C. Ewell, R. C. Whitcananck, L. D. Kindler, A. Narayanan, S. R. Surampudi, S. 2006-11-28T19:34:14Z 2006-11-28T19:34:14Z 2004-08-16
dc.identifier.citation 2nd International Energy Conversion Engineering Conference, Providence, Rhode Island, August 16-19, 2004. en
dc.identifier.clearanceno 04-2424
dc.description.abstract Lithium-sulfur dioxide batteries exhibit voltage delay, which tends to increase at low discharge temperatures, especially after extended storage at warm temperatures. In the absence of a depassivation circuit, as provided on earlier missions, e.g., Galileo, we were required to depassivate the lander primary batteries in a unique manner. The batteries were brought onto a shunt-regulated bus set at preselected discharge voltages, thus affecting depassivation during constant discharge voltage. Several ground tests were performed, on cells, cell strings and battery assembly with five parallel strings, to identify optimum shunt voltages and durations of depassivation. We also examined the repassivation of lithium anodes, subsequent to depassivation. IIn this paper, we will describe these studies, in detail, as well as the depassivation of the lander flight batteries on both Spirit and 0pportunity rovers prior to the EDL sequence and their performance during landing on Mars. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 2585349 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004. en
dc.subject Mars rovers en
dc.subject Li primary en
dc.subject Li-SO2 batteries en
dc.subject voltage delay en
dc.title Lithium-sulfur dioxide batteriess on Mars Rovers en
dc.type Preprint en

Files in this item

This item appears in the following Collection(s)

Show simple item record



My Account