Active Cell Balancing using Microcontroller

Abstract

The presented paper introduces an idea for active cell balancing using microcontroller. This uses one current sensor and two voltage sensor to gather data required for the proposed active balancing method. The individual cell measurement is required for Li-Ion batteries in many applications to prevent exothermic reaction. The proposed idea uses a microcontroller as brain to regulate the switch connected to inductor, which is a passive element and is used for transfer of charge from one cell to another cell. This idea uses deviation of each cell’s voltage level from the mean voltage calculated by the microcontroller. The proposed balancing algorithm can reduce the micro cycles taken to transfer charge from one individual cell to another.