Nickel/Cadmium Aircraft Batteries: Rapid Electrolyte Exchange Technique.
Abstract
The potassium hydroxide electrolyte in nickel/cadmium aircraft batteries may become increasingly more contaminated by carbonate with battery use. When the carbonate concentration exceeds certain limits it is advisable to exchange the electrolyte. However, most of the electrolyte in a cell is soaked into the separator materials and plate pores, and is held in the pack, so only a small portion of it may be poured out. Repeated removal and replacement of these small amounts can accomplish the desired exchange if the clean added electrolyte is adequately mixed with the contaminated electrolyte each time. In the normal procedures, mixing is accomplished by discharging and recharging the battery after each small exchange and hence is very time consuming. This paper discusses the various factors involved and presents a vacuum technique for mixing the added with the retained electrolyte in each cell. The method presented reduces the time required for the above operation from a week or more to a day or two. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1977
- Accession Number
- ADA039335
Entities
People
- K. Feldman
- R. M. Hayashi
Organizations
- Defence Research and Development Canada