Nickel–hydrogen battery

A nickel-hydrogen battery ( NiH2 ) is a rechargeable electrochemical power source on the basis of nickel and hydrogen. Hydrogen is stored in a pressure cell and differs from the nickel -metal hydride batteries. NiH2 cells are expensive and unwieldy, but have good electrical properties, which make them a preferred storage for electrical energy in satellites and space probes. For example, the ISS and the NASA Mars Global Surveyor are equipped with nickel-hydrogen batteries.

The energy density is 75 Wh / kg, based on the volume, however, only 60 Wh / dm ³. The shelf life of several years. The open-circuit voltage is 1.55 V, the voltage under load approximately 1.5 V and the discharge voltage of 1.25 V. The cells absorb more than 20,000 load cycles. Pressure and voltage sensors can be quite accurately determine the state of charge.

See also

  • Nickel ( II) hydroxide
Nickel(II) hydroxide Aluminium–air battery Nickel oxyhydroxide battery Sodium–sulfur battery Nickel–lithium battery Lithium–air battery Lithium–sulfur battery Daniell cell Edison-Lalande cell Grove cell Clark cell Fuel cell
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