CELL EQUALIZATION TECHNIQUES
W.D. Loftus · 1963
Additional work on the 1.5 volt nickel-cadmium cell stabistor and experimental test results verify the feasibility of equalizing the cells of a series connected group by use of stabistors. Effort was directed toward the design of a 2.0 volt stabistor for use with the silver-zinc couple. Preliminary theoretical and experimental investigations indicate satisfactory operation of the stabistor on the lower voltage plateau; operation on the higher voltage plateau is expected to involve losses. The specific voltage of the anti-reversal device has been reduced by about 10% by a different method of junction formation. One experimental charge control circuit has been cycled in excess of 1250 times and a second circuit was cycled 785 times without catastrophic failure of cells or semiconductors.