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Reliability prediction of large fuel cell stack based on structure stress analysis

机译：基于结构应力分析的大型燃料电池堆可靠性预测

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摘要

The aim of this paper is to improve the reliability of Proton Electrolyte Membrane Fuel Cell (PEMFC) stack by designing the clamping force and the thickness difference between the membrane electrode assembly (MEA) and the gasket. The stack reliability is directly determined by the component reliability, which is affected by the material property and contact stress. The component contact stress is a random variable because it is usually affected by many uncertain factors in the production and clamping process. We have investigated the influences of parameter variation coefficient on the probability distribution of contact stress using the equivalent stiffness model and the first-order second moment method. The optimal contact stress to make the component stay in the highest level reliability is obtained by the stress strength interference model. To obtain the optimal contact stress between the contact components, the optimal thickness of the component and the stack clamping force are optimally designed. Finally, a detailed description is given how to design the MEA and gasket dimensions to obtain the highest stack reliability. This work can provide a valuable guidance in the design of stackstructure for a high reliability of fuel cell stack. (C) 2017 Published by Elsevier B.V.
机译：本文的目的是通过设计膜电极组件（MEA）和垫圈之间的夹持力和厚度差来提高质子电解质膜燃料电池（PEMFC）的可靠性。叠层的可靠性直接取决于部件的可靠性，而部件的可靠性受材料性能和接触应力的影响。部件接触应力是一个随机变量，因为它通常在生产和夹紧过程中受到许多不确定因素的影响。我们使用等效刚度模型和一阶二阶矩法研究了参数变化系数对接触应力概率分布的影响。通过应力强度干涉模型获得使零件保持最高可靠性的最佳接触应力。为了获得接触部件之间的最佳接触应力，对部件的最佳厚度和叠层夹紧力进行了优化设计。最后，给出了如何设计MEA和垫片尺寸以获得最高堆叠可靠性的详细说明。这项工作可以为燃料电池堆的高可靠性设计堆结构提供有价值的指导。 （C）2017由Elsevier B.V.发布

著录项

  • 来源
    《Journal of power sources》 |2017年第30期|95-102|共8页
  • 作者

    Liu L. F.; Liu B.; Wu C. W.;

  • 作者单位

    Dalian Univ Technol, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    PEMFC stack; Reliability; Clamping force; Thickness;

    机译：PEMFC叠层;可靠性;夹紧力;厚度;

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