INVESTIGATION OF HERMETICALLY SEALED MAINTENANCE-FREE, HIGH RATE, NICKEL-CADMIUM BATTERIES FOR AIRCRAFT APPLICATIONS.
Quarterly technical progress rept. no. 2,
GULTON INDUSTRIES INC METUCHEN N J
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An MS 24498 battery was subjected to constant potential charging at 26V, 28V, 30V, and 32V to determine the charging current at these voltages. Following charging, the cells were discharged to 1.0Vcell to determine if the battery can be charged to 70 of its rated capacity in five minutes between these voltage limits. These data were also used to calculate charge efficiencies. A theoretical analysis outlining the factors which contribute to polarization was made. Sealed nickel-cadmium cells containing plates of varying thickness were tested to determine the effect of current density on voltage behavior during high rates of charge and discharge. High purity nickel and cadmium salt solutions nitrates, chlorides, and acetates were used to impregnate plates to study the effect of impurities on self-discharge of sealed nickel-cadmium cells. Two different circuit configurations were tested to obtain data for use in the design of the input stage of the charge control circuit. Author