Comparative survey on modular cell-equalizing circuits for battery management systems

Abstract

The charge/discharge imbalance problems in series-connected batteries may result in ravage to cells in battery and decrease battery life cycles. This study presents a comparison survey study among different modular cell balancing approaches that are used to balancea battery cell voltage for battery management systems. In particular, the cell equalizing methods that are considered in this paper have a modular structure. This paper would provide guidelines for selecting a suitable topology during the design process of modular cell balancers. A module concept of modular cell balancer shown in the paperis useful for future research on modular cell equalization approaches for energy storage applications.