Topology Optimization of the Endplate of Proton Exchange Membrane Fuel Cell Packaged with Belts
The endplate mass of fuel cell stack and the uniform distribution of packaging load directly af-fect the power density,efficiency,reliability and service life of the stack.In order to reduce the structural mass of the endplate of proton exchange membrane fuel cell(PEMFC)packaged with belts and improve the uniformity of the internal contact pressure of the stack,a two-dimensional topology optimization model of the endplate of the fuel cell stack is established based on the equivalent stiffness model through numeri-cal simulation.The results show that the endplate of the flat bottom structure can significantly achieve the goal of lightweight through topology optimization,but it can not reduce the weight and improve the pres-sure distribution uniformity of the reactor body at the same time,and it is the optimal structure when the average volume factor reaches 0.5;The endplate with upward sloping bottom can obviously improve the u-niformity of contact pressure inside the stack.The topology optimization of the endplate of the bottom up-dip structure can improve the pressure distribution uniformity of the reactor body while reducing the weight.When the bottom updip height of the endplate is 0.09 mm,the pressure distribution uniformity is the best,and the comprehensive evaluation index is also the best.Therefore,the topology optimization can provide a theoretical reference for the structural design of the endplate.
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