退役锂离子动力电池梯次利用政策、挑战及研究进展

Policy,Challenges and Research Progress of Echelon Utilization of Retired Lithium-ion Power Batteries

锂离子电池(Lithium-ion Batteries,LIBs)作为新能源汽车的核心部件,其常规使用寿命为5~8年,而从汽车上退役的锂离子动力电池还剩余70%~80%的容量,仍然具有使用价值。研究退役LIBs梯次利用,有助于延长电池使用寿命和实现资源利用最大化。本文从政策、标准和实际应用案例阐述我国退役LIBs梯次利用现状,阐明退役LIBs梯次利用面临的挑战,综述退役LIBs剩余容量快速预测和一致性分选两大关键技术的研究进展,最后对退役LIBs梯次利用发展趋势进行展望。

As the core component of new energy vehicles,lithium-ion batteries(LIBs)have a service life of 5~8 years,while LIBs that have been retired from automobiles still have 70%~80%of their capacity and still have practical value.Studying the cascade utilization of retired LIBs is helpful to prolong the service life of batteries and maximize the utilization of resources.The echelon utilization of retired LIBs is systematically reviewed in this paper.Firstly,the policies,standards and practical application cases of echelon utilization of retired LIBs is analyzed.Secondly,the challenges of echelon utilization are summarized.Then,the research progress of two key technologies of retired LIBs-rapid prediction of residual capacity and consistent sorting is reviewed.Finally,the development trend of echelon utilization of retired LIBs is propsed.