Battery storage systems (BESS) are frequently thought of to support the power grid. Second-life batteries (SLBs) are becoming a desirable BESS substitute as the market for electric vehicles expands quickly. However, using SLBs has drawbacks because of the batteries\' varying states of charge (SOC) and state of health (SOH). This study examines two control strategies for a cascaded H-bridge (CHB) topology used to link SLBs to the grid. The possibilities for manipulating the BESS are increased by employing a CHB topology. Two battery energy management system (BEMS) techniques are proposed based on the batteries State-of-Energy (SOE), one continuous and one discrete balancing technique. The laboratory results demonstrate the applicability of the suggested solutions, expanding and diversifying the battery control capabilities.
