Investigation of Thermal Influence on the Assembly of Polymer Electrolyte Membrane Fuel Cell Stacks

Lin Fa Peng; Dian Kai Qiu; Pei Yun Yi; Xin Min Lai

doi:10.4028/www.scientific.net/AMR.512-515.1509

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 512-515Investigation of Thermal Influence on the Assembly...

Investigation of Thermal Influence on the Assembly of Polymer Electrolyte Membrane Fuel Cell Stacks

Abstract:

The assembly force in a proton exchange membrane fuel cell (PEMFC) stack affects the characteristics of the porosity and electrical conductivity. Generally, the stack is assembled at room temperature while it’s operated at about 80 °Cor even higher. As a result, the assembly pressure can’t keep constant due to thermal expansion. This paper focuses on the contact pressure between membrane electrode assembly (MEA) and bipolar plates in real operations. A three-dimensional finite element (FE) model for the assembly process is established with coupled thermal-mechanical effects. The discipline of contact pressure under thermal-mechanical effect is investigated. A single cell stack is fabricated in house for the analysis of contact pressures on gas diffusion layer at different temperatures. The results show that as the temperature increases, contact pressure increases due to thermal expansion. It indicates that the influence of thermal expansion due to temperature variation should be taken into consideration for the design of the stack assembly process.

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Periodical:

Advanced Materials Research (Volumes 512-515)

Pages:

1509-1514

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.512-515.1509

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Online since:

May 2012

Authors:

Lin Fa Peng, Dian Kai Qiu, Pei Yun Yi, Xin Min Lai

Keywords:

Assembly Process, Contact Pressure, Fuel Cell (FC), Modeling

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