A nickel–hydrogen battery (NiH2 or Ni–H2) is a rechargeable electrochemical power source based on nickel and hydrogen. It differs from a nickel–metal hydride (NiMH) battery by the use of hydrogen in gaseous form, stored in a pressurized cell at up to 1200 psi (82.7 bar) pressure. The nickel–hydrogen battery was. The development of the nickel hydrogen battery started in 1970 at and was used for the first time in 1977 aboard the U.S. Navy's Navigation technology satellite-2 (NTS-2). Currently, the major manufacturers of. The nickel–hydrogen battery combines the positive nickel electrode of a nickel–cadmium battery and the negative electrode, including the catalyst and gas diffusion elements, of a. During discharge, hydrogen contained in the pressure vessel is. • • • • • • • Individual pressure vessel (IPV) design consists of a single unit of NiH2 cells in a pressure vessel. • Common pressure vessel (CPV) design consist of two NiH2 cell stacks in series in a common pressure vessel. The CPV provides a slightly higher than. • Albert H. Zimmerman (ed), Nickel–Hydrogen Batteries Principles and Practice, The Aerospace Press, El Segundo, California. • • •.
