Accession Number : AD0713457

Title :   ANALYSIS AND EVALUATION OF SPACECRAFT BATTERY ACCELERATED LIFE TEST DATA.

Corporate Author : NAVAL AMMUNITION DEPOT CRANE IND QUALITY EVALUATION DEPT

Report Date : 22 SEP 1970

Pagination or Media Count : 81

Abstract : The report presents the findings from the mathematical/statistical analysis of data generated from the accelerated life test on 40 nickel-cadmium spacecraft battery cells. Two major objectives of the analysis were to: (1) determine the applicability and reliability of the previously developed cell life prediction model when applied to an accelerated life situation and (2) attempt to make alterations in the prediction model which would make it more conducive to accelerated life testing. Results of the analysis, based on eight failures to date, indicate: (1) about 75% accuracy in predicting the useful life of a cell with the original prediction model and (2) the application of Bayesian analysis techniques yields the same accuracy, but enables the model to be formally used in the absence of historical data. (Author)

Descriptors :   (*STORAGE BATTERIES, ACCELERATED TESTING), (*ALKALINE BATTERIES, ACCELERATED TESTING), STATISTICAL ANALYSIS, FAILURE(ELECTRONICS), NICKEL, CADMIUM, RELIABILITY(ELECTRONICS), LIFE EXPECTANCY

Subject Categories : Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE