Parallel Operation of Energy-Storage Modules Based on Lithium-Ion Batteries

The results of the development of an experimental prototype of a modular-type energy-storage device based on lithium–iron–phosphate batteries are presented. The storage, which is designed to power industrial electrical consumers at an alternating three-phase voltage of 380 V, supports parallel operation of the modules by synchronizing the output voltages of the inverters included in the modules. A block diagram and description of the main components of the drive are presented. An algorithm for synchronizing voltage inverters in parallel operation is analyzed. The results of modeling and experimental studies of the storage are presented.