In order to investigate the electrical response of proton exchange membrane fuel cell(PEMFC)stack under impact load,and to reveal the mechanical-electrical coupling mechanism of PEMFC stack,the mechan-ical-electrical coupling modeling method of the PEMFC stack under impact load is studied.A systematic investiga-tion is undertaken to investigate the effect of impact velocity and direction on the electrical response of the PEMFC stack,based on the established mechanical-electrical coupling model of the PEMFC stack.The results show that the proposed method for modeling the mechanical-electrical coupling of the PEMFC stack can accurately simulate the in-herent mechanical-electrical coupling characteristics within the PEMFC stack.The ohmic loss of the single cell in-side the PEMFC stack increases as the shock load increases.Meanwhile,the impact load results in the formation of additional electrical contact between the gas diffusion layer(GDL)and the ribs of the bipolar plate,which causes a reduction in the average value of the current density on the surface of the GDL and deterioration in the distribution uniformity.This study has certain guiding significance for the modeling of PEMFC mechanical-electrical coupling and the study of electrical response under impact load.
关键词
质子交换膜燃料电池/有限元方法/冲击/力-电耦合/电学响应
Key words
proton exchange membrane fuel cell stack/finite element method/impact/mechanical-electrical coupling/electrical response
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