Study on the Optimal Cross-Sectional Shapes of the PEMFC Endplates by Using a Moment of Inertia and 3D FEM Models

The deflection of the endplate under clamping force has a vital effect on fuel cell performance. An optimal cross-sectional shape with high moment inertia is significant to maximize bending stiffness stack. Five shapes (rectangular, round, parabolic, rectangular + and parabolic) typical endplates are proposed. analytical study moments introduced analyzed. maximum cross-sections obtained displayed in matrix thickness length. statistical results show that “rectangular parabolic” cross-section advantage wide dimensional size while maintaining inertia. Finally, studies validated by finite element method (FEM) corresponding trends highly agreed upon. parabolic 85.71% higher than 80 mm, contact pressure variance 6.15% less endplate. presented effective optimize provide an design direction for large