Apparatus and method for determining the capacity of a nickel-cadmium battery

摘要

The invention provides for a timesaving method of determining the capacity of a nickel cadmium (NiCd). A fully charged NiCd battery under is subjected to a positive sloped current charge ramp and then a negative sloped current charge ramp while continuously monitoring the battery terminal voltage. The voltage is plotted and the maximum slope of the measured terminal voltage determines lgas. The value of Igas is compared to a temperature calibration curve to determine the capacity of the battery under test.