为了探究质子交换膜(PEMFC)工作过程中密封件的压缩比对电池密封性能的影响,首先采用Mooney-Rivilin 5超弹性本构模型对EPDM70密封条材料进行曲线拟合,以提高分析和仿真精准性。然后对密封件的高度、形状进行设计计算,设计了用于压缩仿真的圆角为0.2 mm的矩形模型,并通过拓扑优化分析逐步设计为双峰结构。最后采用ANSYS非线性有限元方法对燃料电池密封条的压缩进行仿真分析。结果表明,圆角密封胶线的密封力更大,圆角平面密封胶线的密封力与双峰结构一致,并在密封要求下提出了密封件的初始高度。

In order to investigate the influence of the compression ratio of the sealing element on the sealing performance of the cell during the operation of the proton exchange membrane (PEMFC),the Mooney-Rivilin 5 hyperelastic intrinsic model is firstly used to curve fit the EPDM70 seal material to improve the accuracy of analysis and simulation.Then,the height and shape of the sealing element are designed and calculated,and a rectangular model with rounded corners of 0.2 mm is designed for compression simulation,and gradually designed as a bimodal structure by topology optimization analysis.Finally,ANSYS nonlinear finite element method is employed to simulate the compression of the fuel cell sealing strip.The results show that the rounded corner sealant-thread exhibits a higher sealing force that is consistent with the double-peaked structure.The initial height of the seal element is proposed under the sealing requirement.

李天(1995-),男,硕士生。