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Results from life test in progress on Eagle-Picher nickel-cadmium cells. Technical report

Technical Report ·
OSTI ID:7175025
This report summarizes the results from low-earth-orbit life testing on Eagle-Picher nickel-cadmium cells of nominal 50 Ah capacity that have been undergoing testing since 1983. As these cells have limited ability to withstand overcharge, a V-T charging scheme was adopted at the outset after careful determination of safe peak-charge voltages at the two operating temperatures of 0 and 20 C. Of the original 30 cells put on life cycling under a complex load profile (10 cells each of 0 C/25% maximum depth-of-discharging (DOD), O C/40% maximum DOD, and 20 C/25% maximum DOD), both cell packs at 0 C were discontinued after less than 5000 pack at 20 C has exceeded 15,000 cycles (in May 1987), with no evidence of voltage spreading or other serious decline in performance. The original V-T level selected for this pack has not required adjustment.
Research Organization:
Aerospace Corp., El Segundo, CA (USA). Chemistry and Physics Lab.
OSTI ID:
7175025
Report Number(s):
AD-A-192816/7/XAB; TR-0086A(2945-01)-7
Country of Publication:
United States
Language:
English