Design and development of battery management system (BMS) using hybrid multilevel converter

ABSTRACT

Batteries that are integrated to the renewable system have to bear a wide range of operational conditions such as varying rates of charge/discharge, depth of discharges, temperature fluctuations and so on. When these batteries are connected in series, after several charging and discharging cycles, the voltage and state-of-charge (SOC) imbalance will occur between different batteries. In the proposed topology, the hybrid multilevel converter is used along with auxiliary battery to get constant output voltage during discharging and store excess power during charging. As a result, the voltage and SOC get balanced and also overcharging and discharging can be avoided. The multilevel output is used to improve the performance of the load and battery lifetime.

KEYWORDS:

• Battery
• renewable energy resources
• state of charge (SOC)
• hybrid multilevel converter

Disclosure statement

No potential conflict of interest was reported by the authors.