Study of Bipolar Nickel-Cadmium Batteries as Pulsed Load Filters.
Abstract
Bipolar nickel-cadmium batteries were designed, built, and tested for possible use as capacitive filter elements in pulsed power applications. Electrodes were made by electrochemically impregnating sintered sides of nickel cell walls. Four-cell batteries were constructed by compressing the electrodes together with Teflon seals. A computer controlled test circuit charged and discharged the test batteries at frequencies of 1 to 50 Hertz and at depths of discharge of less than one percent. A special test battery was constructed with a removeable cadmium electrode for scanning electron microscope study. Battery energy density, effective capacitance, and efficiency were investigated as a function of current load or depth of discharge, cycle rate, and end of discharge voltage. Energy densities of nearly 75 joules per pound were demonstrated. Current loads of up to a 100 C-rate were demonstrated and an average capacitance of 6 farads was achieved. Cadmium electrode morphology was photographed and studied as a function of the charge and discharge cycle life with no crystalline anamolies discovered. Sinter corrosion, nickel electrode overcharging, and individual cell voltage imbalances were discovered as areas for further study. Keywords: Theses. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1985
- Accession Number
- ADA163949
Entities
People
- John M. Ulmer
- Robert W. Chedister
Organizations
- Air Force Institute of Technology