Passive Cell Balancing and Battery Charge Controller with CCCV Topology

This paper presents the passive cell balancing of a lithium-ion battery cells and battery cell charging with the use CCCV (Constant current constant voltage Topology). When battery cells are connected in series, they frequently become unbalanced. The cell voltages aren't all the same. Variations in cell parameters such as cell difference in SOC of battery cell, impedances, capacity, self-discharge rate, cell temperature and so on can cause this unbalance. Passive cell balancing is constructed and examined in a stand-alone state in this paper. The features of passive balancing are determined in this study by conducting an on-line passive balancing experiment of charge and discharge at various capacities (SOC). In this paper, circuitary for battery charge controller circuit is also designed and the Constant voltage/constant current(CCCV) topology is investigated to prevent overcharging issues. The proposed system is analyzed and studied in MATLAB/Simulink.