Lite-Sparse Hierarchical Partial Power Processing for Heterogeneous Degradation of Batteries in Energy Storage Systems

Power conversion is a significant cost in second-use battery energy storage systems (2-BESS). 2-BESS is a sustainable pathway for retired batteries of electrical vehicles (EV) to provide energy storage for the grid and EV fast charging. We present and demonstrate the optimization of Lite-Sparse Hierarchical Partial Power Processing (LS-HiPPP) for battery degradation over the potential lifetime of the 2-BESS. LS-HiPPP has a significantly better performance tradeoff with lower power processing than other partial and full power processing architectures.