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A two‐dimensional, axisymmetric, and time‐dependent thermal model was developed to study the temperature behavior of the cylindrically shaped common‐pressure‐vessel nickel‐hydrogen cell. A differential‐energy‐balance equation was used as the governing equation. A finite‐element software package called PDE/Protran was used to solve this model. Different materials such as copper, copper beryllium, silver, and sterling silver were compared as heat‐fin materials. The heat‐fin geometry (thickness and height) and spacing were tested to find a design that yielded an acceptable temperature gradient inside a nickel‐hydrogen cell. Pulse heat‐generation rates were tested and correlated with the time‐dependent heat‐generation cases.

Comparison of Heat‐Fin Materials and Design of a Common‐Pressure‐Vessel Nickel‐Hydrogen Battery