高温工况下PEMFC硅橡胶密封垫的性能
Performance of PEMFC silicone rubber sealing gaskets under high-temperature operating conditions
摘要
针对高温工况下质子交换膜燃料电池(PEMFC)密封结构的气体泄漏问题,开展数值模拟与实验相结合的研究.建立单体PEMFC的有限元模型,基于ABAQUS平台模拟运行过程中的力学行为,并通过热力耦合实验,分析硅橡胶密封圈的应力与应变响应.采用压降法进行实验验证,揭示温度变化对燃料电池密封性能的影响.高温工况改变密封应力分布与气密性:60 ℃时,整体平均应力增至1.509 9 MPa,较室温气密性增加;100 ℃时,整体平均Mises应力降为1.126 4 MPa,较室温下降超过30％,密封失效风险增大.研究可为燃料电池密封结构的设计与优化提供参考.
Aiming at the issues of gas leakage in the sealing structure of proton exchange membrane fuel cell(PEMFC)under high-temperature conditions,a combination of numerical simulation and experiment is carried out.A finite element model of a single PEMFC is developed on the ABAQUS platform to simulate its mechanical behavior during the assembly process.Thermo-mechanical coupling experiments are conducted,with a focus on analyzing the stress and strain response of the silicone rubber sealing gasket.The pressure drop method is employed for experimental validation,revealing the influence of temperature variations on the sealing performance of the fuel cell.High-temperature conditions alter the stress distribution and air tightness of the sealing structure:at 60 ℃,the overall average stress increases to 1.509 9 MPa,enhancing the air tightness compared to room temperature;at 100 ℃,the overall average Mises stress drops to 1.126 4 MPa,a decrease of more than 30％from room temperature,thereby increasing the risk of sealing failure.The research provides a reference for the design and optimization of fuel cell sealing structures.
年，卷(期)：
2026, 56(4)
分类号：
TB42
TM911.41
机标分类号：
U455.43
TQ336.4+2
TM911.4
在线出版日期：
2026年9月20日
基金项目：
52575584:国家自然科学基金，
