Investigation of Hermetically Sealed, Maintenance Free, High Rate, Nickelcadmium Batteries for Aircraft Application

摘要

An MS-24498 battery was subjected to high rate discharges at room temperature and at -22F, to determine what factors are responsible for the high voltage loss. Polarization was found to be the major factor. Sintered plaques of 0.020 in, 0.035 in, and 0.050 in thickness were prepared, impregnated and formed in preparation for cell assembly. These cells are used for studying polarization and charge efficiency of sealed nickel-cadmium cells during high rates of charge and discharge. High purity nickel and cadmium salt solutions were prepared. These solutions are used to impregnate plates for studying self-discharge in sealed nickel-cadmium cells. VO-6 cells, containing Adhydrodes, were overcharged at sufficiently high currents to maintain internal cell pressures ranging from 5 psi to 65 psi. The adhydrode power output, as a function of Adhydrode to cathode load resistance at these various pressures, were determined. Cd/Cd(OH)2 coulometors were fabricated for studying their voltage characteristics. (Author)