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大型质子交换膜燃料电池优化建模
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Abstract:
本文研究质子交换膜燃料电池(Proton Exchange Membrane Fuel Cell, PEMFC)中的关键部件密封圈和气体扩散层(Gas Diffusion Layer, GDL)在制造时产生的尺寸公差对其受力影响。通过建立一种弹簧–阻尼模型用于仿真大型电堆的压紧过程。此模型相比于FEM (Finite Element Method)模型，极大提高了计算效率。传统FEM模型计算单片单电池所需的时间通常会超过20分钟，而当电堆层数增加时，计算时间会呈非线性增加，采用此模型计算100层电堆只需要8分钟。计算结果可以显示出每一层电池中的密封圈和GDL的受力大小，根据这些结果，可为电堆的夹紧力设计提供参考。结果表明，随着压缩比增大，密封圈和GDL的受力及力的标准差呈非线性增加，含有公差的部件与标准部件受力的值相差达到28%。
In this paper, we investigated the effect of dimensional tolerance on the force of key component seal ring and GDL (Gas Diffusion Layer) in PEMFC (proton exchange membrane fuel cell) when manufac-tured. A spring-damping model was developed to simulate the compression process of a large stack. Compared with FEM (Finite Element Method) model, this model greatly improved the calculation ef-ficiency. The traditional FEM model usually takes more than 20 minutes to compute a single cell, but the calculation time increases nonlinearly as the number of layers increases. It takes only 8 minutes to calculate 100 layers of stack using this model. The calculation results can show the force of the seal ring and GDL in each cell, according to these results, it can provide a reference for the de-sign of the clamping force of the stack. The results showed that the force and standard deviation of force of seal ring and GDL increased nonlinearly with the increase of compression ratio. The differ-ence of force between the tolerance component and the standard component is up to 28%.
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