质子交换膜燃料电池流道结构对反应气体流动、热交换、电化学反应具有重要影响。为针对常见流道在反应气体分布不均，液态水管理和输出性能等问题，本团队设计出3种点阵型流场。建立了传统平行流场和点阵型流场的三维质子交换膜燃料电池几何模型，并对比了输出性能、氧气运输阻力、氧气摩尔浓度均匀性系数、氧气分布和液态水饱和度。结果表明，相比传统平行流场，3种点阵型流场的输出性能均高于传统平行流场，峰值功率密度增加24.74%，点阵型流场的氧气运输阻力显著小于传统平行流场，氧气摩尔浓度均匀性系数显著大于传统平行流场。并且点阵型流场能明显改善电池内部氧气分布的均匀性和液态水管理，有望为燃料电池流道结构创新提供新的思路。

The flow channel structure of a proton-exchange membrane fuel cell (PEMFC) has an important influence on the reaction gas flow, heat exchange, and electrochemical reactions.In order to address issues such as uneven distribution of reaction gases, liquid water management and output performance in common flow channels, our team designed three types of lattice flow fields.A three-dimensional proton exchange membrane fuel cell geometric model of traditional parallel flow field and lattice flow field was established, and the output performance, oxygen transport resistance, oxygen molar concentration uniformity coefficient, oxygen distribution and liquid water saturation were compared.The results show that compared with the traditional parallel flow field, the output performance of the three lattice flow fields is higher than that of the traditional parallel flow field, and the peak power density increases by 24.74%. The oxygen transport resistance of the lattice flow field is significantly smaller than that of the traditional parallel flow field. The molar concentration uniformity coefficient is significantly larger than that of the traditional parallel flow field.Moreover, the lattice flow field can significantly improve the uniformity of oxygen distribution and liquid water management inside the battery, and is expected to provide new ideas for fuel cell flow channel structure innovation.

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湖南省自然科学基金面上项目（2021JJ30302）；湖南省教育厅科学研究重点项目(20A216)