Title :
90-ampere-hour nickel-hydrogen dependent pressure vessel (DPV) low Earth orbit (LEO) life test evaluation
Author :
Baer, Jean Marie ; Ang, Valerie J. ; Hwang, Warren C.
Author_Institution :
Energy Technol. Dept., Aerosp. Corp., El Segundo, CA, USA
Abstract :
Three 90-Ah dependent pressure vessel (DPV) battery packs are being LEO life tested at Crane. As of 9/10/01, the 40% DOD pack has completed 4863 total cycles, and the 60% DOD pack has completed 2885 total cycles. The third pack, formerly tested at 71% DOD but currently run at 60% DOD, had 2067 total cycles as of 9/24/01. The philosophy of these tests is to minimize charging to maximize life, so all the packs started with low charge-discharge (C/D) ratios. As a result, the charge conditions of the packs, especially the two 60% DOD packs, have been changed to find the appropriate operating points for these cells and packs
Keywords :
hydrogen; life testing; nickel; pressure vessels; secondary cells; space vehicle power plants; LEO life testing; Ni-H2; dependent pressure vessel battery packs; low Earth orbit life test; low charge-discharge ratios; nickel-hydrogen cell design; operating points; Aerospace testing; Batteries; Calibration; Capacitive sensors; Cranes; Life testing; Low earth orbit satellites; Manufacturing; US Department of Defense; Voltage;
Conference_Titel :
Battery Conference on Applications and Advances, 2002. The Seventeenth Annual
Conference_Location :
Long Beach, CA
Print_ISBN :
0-7803-7132-1
DOI :
10.1109/BCAA.2002.986365
