Evaluation Program for Secondary Spacecraft Cells Evaluation of Storage Methods, Open Circuit Versus Continuous Trickle Charge, Sonotone 3.5 Ampere-Hour Sealed Nickel-Cadmium Secondary Spacecraft Cells,

Evaluation of methods for storage of nickel-cadmium cells at room ambient conditions was begun. The nickel-cadmium cells used for this test were 3.5 ampere-hour D cells manufactured by the Sonotone Corporation. The overall object of these evaluation programs is to gather specific information concerning secondary spacecraft cells. Information concerning performance characteristics and limitations including cycle life under various electrical and environmental conditions will be of interest to power systems designers and users. Cell weaknesses, including causes of failure of designs, will be of interest to suppliers as a guide to product improvement. Author