Voltage-temperature charge verification testing of 34 ampere-hour nickel-cadmium cells
Abstract
This testing was designed to evaluate various voltage-temperature (V-T) charge curves for use in low-Earth-orbit (LEO) applications of nickel-cadmium battery cells. The trends established relating V-T level to utilizable capacity were unexpected. The trends toward lower capacity at higher V-T levels was predominant in this testing. This effect was a function of the V-T level, the temperature, and the cell history. This effect was attributed to changes occurring in the positive plate. The results imply that for some applications, the use of even lower V-T levels may be warranted. The need to limit overcharge, especially in the early phases of missions, is underlined by this test program.
- Publication:
-
1985 Goddard Space Flight Center Battery Workshop (date)
- Pub Date:
- September 1986
- Bibcode:
- 1986batt.work..267T
- Keywords:
-
- Earth Orbits;
- Nickel Cadmium Batteries;
- Performance Tests;
- Spacecraft Power Supplies;
- Charge Efficiency;
- Electric Discharges;
- Electrical Properties;
- Electrochemistry;
- Temperature;
- Electronics and Electrical Engineering