Control of Cell Voltage Difference Balancing in Battery Management System Charging Circuits in Electric Vehicles

Abstract

The growing development of battery technologies for the transposition of use of fuel in electric vehicles leads to the competent Battery Management System (BMS) design implementation. The chapter focuses on how the voltage difference perturbs the battery pack's performance by using an optimized control strategy. It helps in battery operated vehicles to charge and work efficiently. The control strategy involves the proper switching of the resistors connected to the charging circuit. The thermal balance of the resistors is balanced using the thermal power dissipation modelling in simulation. The models are tested under variable cell voltage conditions in MATLAB Simulink. The technique for voltage error balancing is termed passive cell balancing in BMS for the arrangement of a multiplicity of cells in stacks. The major issue of the passive cell balancing arises due to the State of Charge (SoC) imbalance in the batteries. The charging conditions of the battery are taken into the parameter estimation for the control technique of the balancing technique.