2nd Use Battery Energy Storage System Power Reduction Operation

Abstract

The battery energy storage system (BESS) is an ideal field of batteries retired from Electric Vehicle (EV)/Hybrid Electric Vehicle (HEV). The operation cost and service life is important for BESS operation. In order to solve these problems, this paper proposes a 2nd use BESS power reduction operation method. The BESS power allocation is optimized using Particle Swarm Optimization (PSO) algorithm to search the global optimization result. The state of health (SOH) caused cost increase is taken into consideration to minimize operating cost. Besides, in order to further improve the fault-tolerant operation ability and prolong the service life of 2nd use BESS, a power reduction operation method is proposed. Battery Systems (BSs) with different SOHs could work together, and avoid accelerated aging. Besides, BESS could continue working in power reduction mode when there exists BS that could not work anymore. This enhances system reliability and supplies more power throughput. Simulation results demonstrate that both scheduling time and power throughput are increased using the proposed power reduction operation method.