A simplified finite element model for large polymer electrolyte membrane fuel cell (PEMFC) stack consisting of ten cells is\nestablished in order to investigate the internal structure deformation. It is found that the interface slippage occurs when the bipolar\nplate (BP) and membrane electrode assembly (MEA) are subjected to vertical impact acceleration. Based on this three-dimensional\nmodel, the influence of the friction coefficient between BP andMEAon the relative slippage can be analyzed efficiently.Thedivision\nlayer of relative slippage is found and its vibration rule is discussed. It is observed that increasing the magnitude of impact vibration\nhas most significant effect on the movement of the division layer, and the two variables are linearly related when impact acceleration\nis greater than 5 g. This work provides important insight into the choice of the friction coefficient.
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