HEV电池模组堆垛过程中电芯极柱高度差影响因素研究  

Research on the Factors Influencing the Height Difference of Cell Terminals During Stacking Process of HEV Battery Modules

作　　者：薛于凡 周凯航 和颖凌 XUE Yufan;ZHOU Kaihang;HE Yingling

机构地区：[1]泛亚汽车技术中心有限公司,上海201208

出　　处：《上海汽车》2024年第2期51-55,62,共6页Shanghai Auto

摘　　要：电池包内模组通常由数个电芯成组而成,而模组集成装配的重要工艺之一就是电芯的堆垛,由于电芯本身的尺寸公差及工艺过程中引入公差,电芯堆垛成组后各个电芯的极柱、底面不可避免产生高度差,其形成的面的平面度偏差会影响到模组其他零件的装配,其中最重要的就是连接片与电芯极柱的激光焊接质量。文章主要探讨如何保证模组最终的焊接质量,从电芯尺寸公差、电芯堆垛工艺参数、焊接工艺参数、实际焊接需求等方面对提升焊接质量的因素进行分析。结果表明,电芯自身的尺寸公差与电芯堆垛的工艺设计对最终的堆垛结果均有一定程度的影响。研究结果对后续HEV及更多类型模组的堆垛设计提供了指导。The module inside the battery pack is usually composed of several battery cells grouped together.One of the important processes in the integrated assembly of the module is the stacking of the battery cells.Due to the dimensional tolerances of the battery cells themselves and the introduction of tolerances during the manufacturing process,there will inevitably be height differences between the electrode poles and the bottom surfaces of the battery cells after they are stacked.The flatness deviation of the formed surface will affect the assembly of other components in the module,especially the quality of laser welding between the connecting piece and the electrode pole of the battery cell.Methods to ensure the final welding quality of the module is discussed,and the factors that affect the improvement of welding quality are analyzed from the aspects of battery cell dimensional tolerances,battery cell stacking process parameters,welding process parameters,and actual welding requirements.The results show that both the dimensional tolerances of the battery cells themselves and the process design of battery cell stacking have a certain degree of influence on the final stacking result.The research results of this paper provide guidance for the stacking design of subsequent HEV and other types of modules.

关 键 词：电池模组 电芯堆垛 极柱高度差 激光焊接质量 

分 类 号：U469.72[机械工程—车辆工程]