INVESTIGATION OF HERMETICALLY SEALED, HIGH RATE, MAINTENANCE-FREE, NICKEL-CADMIUM BATTERIES FOR AIRCRAFT APPLICATIONS.
Final technical rept. Jul 64-Jun 66,
GULTON INDUSTRIES INC METUCHEN NJ BATTERY AND POWER SOURCES DIV
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Theoretical and experimental investigations were carried out to improve the high rate charge-discharge characteristics of sealed, nickel-cadmium batteries. These investigations showed that the use of thinner battery plates greatly improved high rate electrical performance. Laboratory prototype cells were fabricated and tested at rates up to 10C on charge and 17C on discharge from -30 F to 140 F. Cell voltages after one minute of discharge at 17C, ranged from 0.45 V at -30 F to above 0.8 V at 140 F. These tests also indicated that the cells could be fully charged in five minutes. However, at temperatures below 20 F hydrogen was evolved in increasingly greater quantities as the temperature dropped. High rate charge efficiency from -30 F to 140 F varied with temperature. The Adhydrode, CdCdOH2 coulometer and pressure switch, as a means to control high rate battery charging, were investigated. The inverter phase control, SCR phase control, and parallel chopper were studied as a means to condition the aircraft bus to the optimum requirements of the battery. Author
- Electrochemical Energy Storage