AEROSPACE CORP EL SEGUNDO CA CHEMISTRY AND PHYSICS LAB
A program to demonstrate the long-term reliability of nickel hydrogen NiH2 cells in low earth orbit LEO and support use in mid-altitude orbit MAO has been initiated. Both 3.5 and 4.5 in. diameter NiH2 cells are included in the test plan. Cells from all U.S. vendors are to be tested. The tests will be performed at -5 and 10 C at 40 and 60 depth of discharge DOD for LEO orbit and 10 C and 80 DOD for MAO orbit simulations. The goals of the testing are 20,000 cycles at 60 DOD and 30,000 cycles at 40 DOD. Cells are presently undergoing acceptance and characterization testing at Naval Weapons Support Center NWSC, Crane, Indiana. Funding has been provided by the Air Force Space Technology Center AFSTC and two AF System Program Offices SPOs to initiate the testing, but additional funding must be acquired to complete the purchase of cells and to assure completion of the testing. Keywords Battery life, Testing, Nickel hydrogen batteries, Nickel hydrogen cells.