电动汽车动力锂离子电池可靠性关键技术综述

Overview of Key Reliability Technologies for Power Lithium-ion Batteries Used in Electric Vehicles

随着动力锂离子电池在电动汽车行业发挥关键性作用,保证其工作可靠性已成为当下研究热点。文中综述锂离子电池材料和制造工艺;详细归纳总结电池状态估算方法以及剩余寿命预测方法,并讨论各种方法的优缺点;从电池管理系统层面,先后梳理均衡管理系统和热管理系统相关知识;从电动汽车混合储能系统层面阐述实际工况下性能退化机理及相关技术。最后总结电动汽车动力锂离子电池与可靠性相关的四个方面关键技术的现状,并展望未来发展可能。

As power lithium-ion batteries play a key role in the electric vehicle industry,ensuring their working reliability has become a research hotspot at present.In this paper,the materials and manufacturing processes of lithium-ion batteries are reviewed.The battery state estimation and remaining useful life prediction methods are summarized in detail,and the advantages and disadvantages of these methods are discussed.From the perspective of battery management system,the relevant knowledges of equalization management system and thermal management system are sorted out in turn.From the perspective of electric vehicle hybrid energy storage system,the performance degradation mechanism under actual working conditions and the relevant technologies are elaborated upon.Finally,the status quo of key technologies related to the reliability of power lithium-ion batteries used in electric vehicles is summarized from four aspects,and the development possibilities in the future are forecasted.