Modeling, Analysis, and Design of Switched-Capacitor Battery Cell Balancers

Abstract

Battery systems have become crucial components in many modern technological solutions. Battery balancers are among the most important parts of these systems because they play a significant role in the battery’s lifespan and performance. A novel capacitive-based balancer was designed and tested for two cell and four cell batteries. The key parameters that were optimized are efficiency, balancing time, volume, and cost. A theoretical model of the circuit was derived to guide design optimization. Additionally, simulations were created to predict performance. Custom printed circuit boards were developed and tested.