• 首页 | 期刊简介 | 编委会 | 投稿须知 | 出版道德规范 | 下载专区 | English
江斌,孔祥景,施伟,田昊,郭战胜*.锂离子电池隔膜的力学性能测量[J].实验力学,2023,38(6):712~722
锂离子电池隔膜的力学性能测量
Mechanical properties of separator for lithium ion batteries
投稿时间:2023-01-04  修订日期:2023-05-01
DOI:10.7520/1001-4888-23-004
中文关键词:  锂离子电池  隔膜  弹性模量  强度  泊松比  数字图像相关
英文关键词:lithium ion batteries  separators  elastic modulus  ultimate strength  Poisson's ratio  DIC test system
基金项目:国家自然科学基金项目(11972218和12172206)
作者单位
江斌 上海大学 力学与工程科学学院, 上海市应用数学和力学研究所, 上海 200072 
孔祥景 深圳市新嘉拓自动化技术有限公司, 广东深圳 518118 
施伟 深圳市新嘉拓自动化技术有限公司, 广东深圳 518118 
田昊 上海大学 力学与工程科学学院, 上海市应用数学和力学研究所, 上海 200072 
郭战胜* 上海大学 力学与工程科学学院, 上海市应用数学和力学研究所, 上海 200072 
摘要点击次数: 1411
全文下载次数: 0
中文摘要:
      隔膜是锂离子电池的重要组成部分,其力学性能的综合表现是保证电池电化学性能的关键因素。本文通过单向拉伸实验和数字图像相关(DIC)技术来研究表面涂敷聚偏二氟乙烯的聚乙烯隔膜的基本力学性能;结合工程应力-应变曲线,分别确定了隔膜横轴(TD)和纵轴(MD)方向在不同拉伸速率下的弹性模量和强度;利用DIC技术得到的应变-时间曲线,确定了隔膜TD和MD方向的泊松比。单向拉伸实验表明,隔膜TD和MD方向的弹性模量和极限强度值都与测试方向无关,且拉伸速率越快,弹性模量越大,但极限强度值基本不变。DIC测试结果表明,隔膜TD和MD方向的泊松比也相等。研究发现,与很多已有隔膜具有明显各向异性性质不同,测试隔膜不但具有较高的弹性模量和极限强度,而且具有明显的各向同性性质。
英文摘要:
      The separator is an important component of lithium ion batteries, and the comprehensive performance of its mechanical properties is an important key factor in ensuring the electrochemical performance of the battery. In this work,the basic mechanical properties of polyethylene separator coated with polyvinylidene fluoride was investigated through uniaxial tensile experiments and digital image correlation (DIC) technology. Based on the engineering stress-strain curve, the elastic modulus and strength of the separator in transverse direction (TD) and transverse direction (TD) directions were determined at different tensile rates. The Poisson's ratios in the TD and MD directions of the separator were determined using the strain-time curve obtained by DIC technology.The uniaxial tension test shows that the elastic modulus and ultimate strength of TD and MD are independent of the test direction, and the faster the tensile rate, the greater the elastic modulus but the ultimate strength is basically unchanged. DIC test results showed that the TD and MD directions of the separator were almost equal. It is found that different from many existing separators which have obvious anisotropic properties, the tested separator not only have high elastic modulus and ultimate strength, but also have obvious isotropic properties.
查看全文  下载PDF阅读器
关闭

版权所有:《实验力学》编辑部
您是本站第 65095988 位访问者,今日一共访问1958次,当前在线人数: 0
技术支持:本系统由北京勤云科技发展有限公司设计