软封装锂电池铝塑膜成形性能研究进展

Research Progress on Forming Performance of Aluminum-plastic Laminated Film for Soft Encapsulated Lithium-ion Batteries

目的综述铝塑膜成形性能的影响因素和研究现状,为锂电池铝塑膜领域的科研,以及工程技术人员进行深入研究,提升产品性能提供参考。方法首先介绍铝塑膜多层复合材料的结构、各层的作用,接着讨论冲压模具、冲压工艺以及基层材料的选择对铝塑膜成形性能的影响,并详细综述铝箔基层合金成分、微观组织和晶粒尺寸对铝箔性能的影响。结论为了加快锂电池铝塑膜的国产化进程,未来需要加强铝塑膜对电解液耐久性的研究,同时进一步提升铝箔的成形性能,加强铝箔界面性质对铝塑复合性能和铝塑膜耐久性影响机理的研究,为增强下游用户对国产铝塑膜的信心提供理论支持。

This paper summarizes the influencing factors and research status of aluminum-plastic film forming per-formance,and provides references for the research and technical personnel in the field of aluminum-plastic laminated film of soft encapsulated lithium-ion battery to conduct in-depth research and improve product performance.Firstly,the struc-ture and function of the aluminum-plastic laminated film multi-layer composite material and the function of each layer is introduced.Then the influence of stamping die,stamping process and the selection of the base material on the forming performance of the aluminum-plastic laminated film is discussed.The effects of the alloy composition,microstructure and grain size of the aluminum foil base layer on the performance of the aluminum foil are reviewed in detail.To sum up,in order to accelerate the localization process of aluminum-plastic laminated film for lithium-ion battery,it is necessary to strengthen the durability of aluminum-plastic laminated film to electrolyte in the future.At the same time,further improve the forming performance of aluminum foil,strengthen the research on the influence mechanism of aluminum foil interface property on aluminum-plastic composite performance and aluminum plastic laminated film durability,provide theoretical support to enhance the downstream users'confidence in domestic aluminum-plastic laminated film.