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forced overdischarge related safety aspects of Li/SO2 and Li/SOCl2 cellsResults of an experiment investigating overdischarge behavior of two types of Li/SO2 cells are presented. Forced overdischarges of the Li/LiBr, CH3CN/SO2 cell can result in unsafe behavior such as venting with fire and release of toxic gases. The hazards may be minimized or eliminated by careful cell design considerations and practice of high standards of quality contol in cell manufacture. Seemingly safe cells at 25 C when forced overdischarged at -25 C, even at low currents, exhibited incipient signs of hazards. Their cathodes indicated signs of shock sensitivity. Cathode limited Li/SOCl2 cells were safe during forced overdischarge for long periods of time. Lithium limited Li/SOCl2 cells in which practically all Li had been used up before cell reversal did not exhibit hazardous behavior. Anode limited Li/SOCl2 cells, but not Li limited, exhibited detonations, all during overdischarges at relatively low current densities of or = 1 mA/sq cm 2. Anode potentials 4v with large oscillations preceeded the events. The events were confined to the anode and the temperature rose high enough to melt Ni grids.
Document ID
19830026964
Document Type
Conference Paper
Authors
Abraham, K. M.
(EIC, Inc. Newton, MA, United States)
Date Acquired
August 11, 2013
Publication Date
August 1, 1983
Publication Information
Publication: NASA. Goddard Space Flight Center The 1982 Goddard Space Flight Center Battery Workshop
Subject Category
Electronics And Electrical Engineering
Accession Number
83N35235
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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