Economic analysis of lithium-ion batteries recycled from electric vehicles for secondary use in power load peak shaving in China

Abstract

The secondary use of recycled lithium-ion batteries (LIBs) from electric vehicles (EVs) can reduce costs and improve energy utilization rate. In this paper, the recycled LIBs are reused to construct a 3 MW∗3 h battery energy storage system (BESS) for power load peak shaving (PLPS). Taking the BESS as an example, a cost-benefit model is established after the systematical analysis of compositions. The cost model is divided into eight components in detail, which can be grouped into three categories: initial investment costs, operation and maintenance costs (O&M costs) and batteries replacement costs. The benefit model comprises seven parts, such as environmental benefit, battery dismantling and recovery benefit and residual value. In the case study, the life model is established by exponential function through the character analysis of the recycled LIBs. The economic analysis of the BESS is carried out in three techno-economic statuses of optimism, business, and research, which is based on two interest-subjects of grid company and non-grid company. Furthermore, both battery purchasing cost (BPC) and government subsidy are performed to sensitivity analysis. The results show that the BESS with recycled LIBs for PLPS, especially those invested by grid company, have a good application prospect in China.