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Parametric and cycle tests of a 40-A-hr bipolar nickel-hydrogen batteryA series of tests was performed to characterize battery performance relating to certain operating parameters which included charge current, discharge current, temperature and pressure. The parameters were varied to confirm battery design concepts and to determine optimal operating conditions. Spacecraft power requirements are constantly increasing. Special spacecraft such as the Space Station and platforms will require energy storage systems of 130 and 25 kWh, respectively. The complexity of these high power systems will demand high reliability, and reduced mass and volume. A system that uses batteries for storage will require a cell count in excess of 400 units. These cell units must then be assembled into several batteries with over 100 cells in a series connected string. In an attempt to simplify the construction of conventional cells and batteries, the NASA Lewis Research Center battery systems group initiated work on a nickel-hydrogen battery in a bipolar configuration in early 1981. Features of the battery with this bipolar construction show promise in improving both volumetric and gravimetric energy densities as well as thermal management. Bipolar construction allows cooling in closer proximity to the cell components, thus heat removal can be accomplished at a higher rejection temperature than conventional cell designs. Also, higher current densities are achievable because of low cell impedance. Lower cell impedance is achieved via current flow perpendicular to the electrode face, thus reducing voltage drops in the electrode grid and electrode terminals tabs.
Document ID
19860022507
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Cataldo, R. L. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1986
Subject Category
Energy Production And Conversion
Report/Patent Number
NASA-TM-88793
NAS 1.15:88793
E-3102
Meeting Information
Meeting: Intersociety Energy Conversion Engineering Conference (IECEC)
Location: San Diego, CA
Country: United States
Start Date: August 25, 1986
End Date: August 29, 1986
Sponsors: ACS, SAE, ANS, ASME, IEEE, AIAA and AIChE
Accession Number
86N31979
Funding Number(s)
PROJECT: RTOP 506-41-21
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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