Cycle life characteristics of sealed silver-zinc cell with inorganic separatorTwo batteries containing 18 cells have been cycling in a simulated synchronous (24-hour) orbit for over a year at 40% depth of discharge at 22 C. One battery is under individual cell monitoring and control and the other battery is controlled at the battery level. The battery with individual cell monitoring and protection has performed over 350 cycles with no sign of failure. The battery without individual cell protection failed at 270 cycles from failure to remain above the specified minimum discharge voltage. A significant conclusion is that the sealed Ag-Zn cells manufactured with the inorganic separator material have demonstrated their capability to cycle at a fairly high depth of discharge and are worthy of consideration in short life synchronous orbit applications.
Document ID
19770065881
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Lear, J. W. (Martin Marietta Aerospace Denver, CO, United States)
Imamura, M. S. (Martin Marietta Aerospace Denver, Colo., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
Spacecraft Propulsion And Power
Meeting Information
Meeting: Intersociety Energy Conversion Engineering Conference