Deformation and failure characteristics of four types of lithium-ion battery separators
Deformation and failure characteristics of four types of lithium-ion battery separators
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DOI：
10.1016/j.jpowsour.2016.07.078
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发表时间：
2016-09-30
影响因子：
9.2
通讯作者：
Wang, Kai
中科院分区：
文献类型：
--
作者：
Zhang, Xiaowei;Sahraei, Elham;Wang, Kai
在电动汽车碰撞事故中，电池隔膜的力学性能和失效机理对锂离子电池的完整性起着至关重要的作用。本研究对四种常用的电池隔膜进行了表征，并对其力学性能、强度和失效情况进行了比较。这包括两个干法聚乙烯（PE）和三层分离器，一个湿法陶瓷涂层分离器和一个无纺布分离器。分别沿着机械方向（MD）、横向方向（TD）和对角线方向（DD）进行单轴拉伸试验。并进行了厚度压缩试验和双轴冲孔试验。综合力学试验揭示了在极端机械载荷下有趣的变形和破坏模式。最后，基于单轴拉伸和透厚压缩试验数据，在LSDYNA软件中建立了PE分离器的有限元模型。该模型成功地预测了PE分离器在不同冲头尺寸冲孔试验下的响应。(C) 2016 Elsevier B.V.版权所有
Mechanical properties and failure mechanisms of battery separators play a crucial role in integrity of Lithium-ion batteries during an electric vehicle crash event. In this study, four types of commonly used battery separators are characterized and their mechanical performance, strength, and failure are compared. This includes two dry-processed polyethylene (PE) and trilayer separators, a wet-processed ceramic-coated separator, and a nonwoven separator. In detail, uniaxial tensile tests were performed along machine direction (MD), transverse direction (TD) and diagonal direction (DD). Also, through thickness compression tests and biaxial punch tests were conducted. Comprehensive mechanical tests revealed interesting deformation and failure patterns under extreme mechanical loads. Last, a finite element model of PE separator was developed in LSDYNA based on the uniaxial tensile and through thickness compression test data. The model succeeded in predicting the response of PE separator under punch tests with different sizes of punch head. (C) 2016 Elsevier B.V. All rights reserved.