Ultrasonic Welding Simulations for Multiple Layers of Lithium-Ion Battery Tabs

被引:51
作者
Lee, Dongkyun [1 ]
Kannatey-Asibu, Elijah [1 ]
Cai, Wayne [2 ]
机构
[1] Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48105 USA
[2] Gen Motors Co, Global R&D Ctr, Mfg Syst Res Lab, Warren, MI 48090 USA
来源
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME | 2013年 / 135卷 / 06期
关键词
ultrasonic welding; vibration; finite element analysis; thermo-mechanical analysis; plasticity; battery tab; copper; aluminum; WIRE BONDING PROCESS; MECHANICAL ANALYSIS; TEMPERATURE; COPPER;
D O I
10.1115/1.4025668
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Ultrasonic welding is a solid-state bond created using ultrasonic energy. It has been used in the semiconductor industry for several decades, and more recently, in the automotive industry such as for lithium-ion battery welding. Although there existed numerical simulations for ultrasonic welding, the models were limited to two-layer and like materials stackups. In this study, finite element theories are introduced and simulation procedure is established for multiple sheets and dissimilar metal ultrasonic welding. The procedures require both ABAQUS/Standard and ABAQUS/Explicit to simulate the coupled mechanical-thermal phenomena over the entire weld duration with moderate computational cost. The procedure is verified and used to simulate selected specific cases involving multiple sheets and dissimilar materials, i.e., copper and aluminum. The simulation procedure demonstrates its capability to predict welding energy, distortion, and temperature distribution of the workpieces. Case studies of ultrasonic welding simulations for multiple layers of lithium-ion battery tabs are presented. The prediction leads to several innovative ultrasonic welding process designs for improved welding quality.
引用
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页数:13
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