BATTERY ENERGY STORAGE SYSTEM

The present disclosure relates to systems and methods for utilizing second-life electric vehicle (EV) batteries as part of a battery energy storage system. In particular, in one or more embodiments, the disclosed systems provide a battery control system that enables use of multiple different types of batteries from different manufacturers and with different chemistries. For example, a site controller oversees system operation by receiving battery-status data from the various battery-management systems, directing inverter blocks to manage power flow among the battery packs, and routing energy to the appropriate loads. At the battery pack level, a pack manager device communicates with individual battery packs from different manufacturers, converts the battery-specific voltage into a standardized direct-current bus level, and regulates battery pack behavior based on reported operating parameters to maintain safe, reliable performance. By so doing, one or more embodiments provide for secondary use of used or partially degraded batteries.