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Thermal modeling of nickel-hydrogen battery cells operating under transient orbital conditionsAn analytical study of the thermal operating characteristics of nickel-hydrogen battery cells is presented. Combined finite-element and finite-difference techniques are employed to arrive at a computationally efficient composite thermal model representing a series-cell arrangement operating in conjunction with a radiately coupled baseplate and coldplate thermal bus. An aggressive, low-mass design approach indicates that thermal considerations can and should direct the design of the thermal bus arrangement. Special consideration is given to the potential for mixed conductive and convective processes across the hydrogen gap. Results of a compressible flow model are presented and indicate the transfer process is suitably represented by molecular conduction. A high-fidelity thermal model of the cell stack (and related components) indicates the presence of axial and radial temperature gradients. A detailed model of the thermal bus reveals the thermal interaction of individual cells and is imperative for assessing the intercell temperature gradients.
Document ID
19920068088
Document Type
Conference Paper
Authors
Schrage, Dean S. (Sverdrup Technology, Inc. Brook Park, OH, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
SPACECRAFT PROPULSION AND POWER
Meeting Information
IECEC ''91: Intersociety Energy Conversion Engineering Conference(Boston, MA)
Funding Number(s)
CONTRACT_GRANT: NAS3-25266
Distribution Limits
Public
Copyright
Other