Experimental Validation and Analysis of Battery Storage Grid Connected Converter: A Study with Li-ion and Lead-Acid Batteries

This paper introduces a battery storage grid-connected converter designed for effectual charging and discharging of battery. The system includes both bi-directional AC-DC and DC-DC converters to facilitate power transfer between the grid and the battery. Initially, a 240V 50Hz AC supply is converted into 600V DC using the AC-DC converter. Subsequently, a bi-directional DC-DC converter (BDDC) is used for charging (buck) and discharging (boost) of the battery, effectively controlled by a proportional-integral controller (PIC). To validate the system, the circuit model is implemented, and the simulation results from MATLAB/Simulink align with the experimental findings. The practicality is confirmed through hardware test setups monitoring battery parameters. Moreover, the comparative analysis between Lithium-Ion and Lead-Acid batteries is performed. The results show successful bidirectional power transfer, confirming the reliability and effectiveness for the battery storage grid-connected system.