The only CC mode charger using estimation of battery internal voltage

Abstract

This research is purposed for the developing battery charger using the internal parameters - internal voltage of batteries and phase-which the existing charger don't use. For the research, the volume of applied voltage and current to batteries has been adjusted using direct connected capacity, and output voltage and current has been sensed. The sensed data go through the DFT, and DFT shows direct component, real, and imaginary numbers. Using these three values, internal voltage of batteries has been monitored. By monitoring the change of the internal voltage, the time which CV takes in ordinary ways can be reduced. Therefore, the quick charger can be developed. Simulation using Psim has been made to prove this idea, and stack has been developed to see the possibilities.