Abstract
Imbalances in battery cells attributed either to the cell production process variability or the operating conditions of the battery, (Conway, 2020) result in the degradation of the overall performance of battery systems and can decrease their life span. Several factors such as the over-voltage, under voltage, overcharge and under charge of battery cells affect the capacity of battery cells. So, several balancing methods have been developed to preserve batteries from damaging and to expand the battery life. The present paper is a brief review about some of the state-of-the-art topologies for battery management systems (BMS). Also, a comparison table is presented. Comparison factors are the circuit design, the balancing speed, the complexity, the efficiency, the cost of production and the size of the presented topologies.
