BESS implement a complete, multilevel battery management system (BMS) for system monitoring and control. Each battery management system including:
l Module Battery management unit (BMU)
l Rack Battery Management controlling System (BCU)
l System-level BMS (BAMS)
BMU is designed to detect voltage, temperature, and execute cell balance functions for cells. BCU can manage all module BMS units and detects total voltage, current, and executes protection functions by switching DC-contactor. Finally, a system-level BMS (BAMS) manages rack BMS units and communicates with PCS or EMS. The table below outlines BMS units of the system.