Study of Bipolar Nickel-Cadmium Batteries as Pulsed Load Filters
Abstract
Bipolar nickel-cadmium batteries were designed, built, and tested for use as capacitive filter elements for possible pulsed power applications. Electrodes were made by electrochemically impregnating sintered sides of nickel cell walls. Four-cell batteries were constructed by compressing together the electrodes separated by 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 and no crystalline anomalies were discovered. Keywords: Nickel cadmium battery; Bipolar nickel cadmium battery; Capacitive filter; Life cycle testing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1987
- Accession Number
- ADA182779
Entities
People
- John M. Ulmer
- Robert W. Chedister
Organizations
- Wright Laboratory