电池2024，Vol.54Issue(4)：487-491,5.DOI:10.19535/j.1001-1579.2024.04.010
三元动力锂离子电池内短路热失控残骸的特征
Characteristics of residue of ternary Li-ion traction battery induced by internal short-circuit
摘要
Abstract
The typical characteristics of the residue are investigated by triggering internal short-circuit thermal runaway through nail penetration to LiNi0.8Co0.1Mn0.1O2(NCM811) Li-ion traction battery.During the experiment,the surface temperature and voltage data of the battery are monitored and the experimental phenomena are recorded.The 3D scanning imaging of the battery before and after the nail penetration is performed by industrial computed tomography (CT),the microstructure and morphology of the electrode residue after thermal runaway are analyzed by XRD,SEM and metallographic microscope.After thermal runaway,the cell of the battery is deformed and torn,the direction of the cell deformation and extrusion points to the internal short-circuit initiation point.In the XRD pattern of the residue material at the initiation site of the internal short-circuit,typical composite phase diffraction peak appears.The residual copper foil at the initiation point of the internal short-circuit presents fine dendrites and equiaxial crystals.The above characteristics of the residue can be used as the basis for locating the internal short-circuit trigger point.关键词
三元动力锂离子电池/LiNi0.8Co0.1Mn0.1O2(NCM811)/热失控/针刺/内短路/残余物Key words
ternary Li-ion traction battery/LiNi0.8Co0.1Mn0.1O2(NCM811)/thermal runaway/nail penetration/internal short-circuit/residue分类
动力与电气工程引用本文复制引用
梁宏毅,王媛,甘友毅,邵丹..三元动力锂离子电池内短路热失控残骸的特征[J].电池,2024,54(4):487-491,5.基金项目
国家重点研发计划项目(2021YFF0601101),国家市场监督管理总局科技计划项目(2020MK127),广州市科技计划项目(202201011357) （2021YFF0601101）
