Generic Stacked BMS Using Low-side MOSFET Control Architecture

This study proposes an innovative stacked battery management system (BMS) architecture for monitoring and controlling 20s lithium titanate oxide (LTO) or lithium batteries, which can be used for applications including 48V energy storage systems, multi-cell electric vehicles, and ultra-high voltage energy storage systems. The proposed stacked BMS uses the BQ76942 series Battery Monitor and Protector IC produced by TI and implements a low-side MOS control architecture, which offers safety and cost advantages over the common high-side architecture. This research demonstrates the feasibility of using BQ76942 to realize a generic stacking architecture BMS for multiple cell applications, which can also be used for different rated voltages of lithium batteries.