Nickel/Cadmium Aircraft Batteries: Experience with Celgard Barrier Layers at DREO.

摘要

Problems arise with nickel/cadmium aircraft batteries as a result of deterioration of the conventional cellophane barrier layer in the separators. The cellophane deteriorates especially rapidly in the cells at elevated temperatures. Tests have shown that Celgard, a polypropylene microporous polymeric film manufactured by the Celanese Plastics Company, can be substituted for the cellophane and can readily withstand the oxidizing environment in the cell even at elevated temperatures. Celgard is available with several variations in characteristics but most of them were not studied in detail. Problems may be experienced with deterioration of wetting characteristics but these do not appear to be serious. Examples of laboratory experience which illustrates the ability of the Celgard to withstand severe usage are given. (Author)