Fuzzy logic based power and thermal management system design for multi-cell lithium-ion battery bank protection and operation

Batteries used as energy storage devices will play an important role in future power systems due to the growing popularity of micro grids (MG) and plug-in hybrid electric vehicles (PEVs). The performance of the MGs and PEVs strongly relies on their battery bank management systems, which always consists of multiple cells connected together in series and in parallel. The energy conversion efficiency of the battery bank system is influenced by a single battery cell´s state of charge (SOC) and temperature variations. Thermal and SOC imbalances increase the risk of catastrophic faults in the battery bank system. In this paper, the design of a novel fuzzy logic based battery bank management system is presented. The battery bank management system will have self-healing capabilities to protect itself from SOC and thermal imbalances. The proposed design is validated by using MATLAB Simulink to present a battery management system that balances the SOC and temperature of a battery module consists of a 6 × 3 configuration of lithium-ion cells connected in series and parallel. The proposed battery bank power and thermal management system can effectively regulate the temperature and balance the SOC´s of the cells in the battery bank during the charging and discharging process, which will largely increase the safety of the whole system.