Single pressure vessel (SPV) nickel-hydrogen battery design

Single pressure vessel (SPV) technology combines an entire multi-cell nickel-hydrogen (NiH₂) space power battery within a single pressure vessel. SPV technology has been developed to improve the performance (volume/mass) of the NiH₂ system at the battery level and ultimately to reduce overall battery cost and increase system reliability. Three distinct SPV technologies are currently under development and in production. Eagle-Picher has license to the COMSAT Laboratories technology, as well as internally developed independent SPV technology. A third technology resulted from the acquisition of Johnson Controls NiH₂ battery assets in June, 1994. SPV batteries are currently being produced in 25 ampere-hour (Ah), 35 Ah and 50 Ah configurations. The battery designs have an overall outside diameter of 10 inches (25.4 centimeters)