装配扭矩对PEMFC性能的影响  

Effect of assembly torque on the performance of PEMFC

作　　者：陈宇轩 陈涛[1] 刘士华[1] 谢屹 CHEN Yu-xuan;CHEN Tao;LIU Shi-hua;XIE Yi(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan,Hubei 430070,China)

机构地区：[1]武汉理工大学机电工程学院,湖北武汉430070

出　　处：《电池》2020年第3期215-219,共5页Battery Bimonthly

基　　金：国家自然科学基金(51575413);武汉市科技计划项目(2018010401011329)。

摘　　要：建立质子交换膜燃料电池(PEMFC)的三维模型,通过有限元法分析不同装配压力下电池的形变和应力分布情况,研究不同装配扭矩对PEMFC性能的影响,得到该电池模型较好的装配扭矩范围。数值模拟得到螺栓装配会导致电池产生一定程度的翘曲变形,电池的变形是不均匀的。在装配扭矩为6~7 N·m时,流道与GDL接触区域的应力分布更均匀。在不同装配扭矩下,对电池进行性能测试,验证分析得到,当装配扭矩为7 N·m时,PEMFC性能最佳。A three-dimensional model of proton exchange membrane fuel cell(PEMFC)was established.The deformation and stress distribution of the cell under different assembly pressures were analyzed by finite element analysis method.The effects of different bolt assembly torques on PEMFC performance were studied to get a better assembly torque range.Numerical simulations showed that the bolt assembly would cause warpage of the cell to some extent,the deformation of the cell was non-uniform.When the assembly torque was 6-7N·m,the stress distribution of the contact area between the flow channel and the gas diffusion layer(GDL)layer was more uniform.The performance of the cell were carried out under different assembly torques to show that the performance of the PEMFC was optimized when the assembly torque was 7N·m.

关 键 词：质子交换膜燃料电池(PEMFC) 装配 扭矩 性能 压力分布 

分 类 号：TM911.42[电气工程—电力电子与电力传动]