Design of Li-Ion Batteries Equalization Module of Electric Vehicle
Due to the limited life of series-connected battery stack suffered from the imbalanced charging-discharging operation, the equalization management module has become the key part of a battery management system. To minimize the adverse effects caused by the performance inconsistency between individual battery cells, a battery equalization management module based on the super-capacitors was designed in this study. This module separated the imbalance status into three types, applied different control strategy according to the status, and balanced every sub-group respectively. Simulation and experimental results showed that not only the module made the battery pack charge and discharge balanced, but also the efficiency of equalization was improved.
Z. X. Li et al., "Design of Li-Ion Batteries Equalization Module of Electric Vehicle", Advanced Materials Research, Vols. 383-390, pp. 2507-2512, 2012