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    • Effects of Cathode Outlet Variable Structure on the Performance of Air-Cooled Proton Exchange Membrane Fuel Cells
    DOI：10.13949/j.cnki.nrjgc.2025.03.008
    Key Words:fuel cell  hydrothermal management  water retention  cooling
    Author NameAffiliationE-mail
    LIU Yi Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China lqyi@kust.edu.cn 
    YANG Xudong Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 1367656712@qq.com 
    LEI Jilin* Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China leijilin@sina.com 
    HE Shuchao Kunming Yunnei Power Co.， Ltd.， Kunming 650200， China heshuchao.130@163.com 
    ZHOU Jie Kunming Yunnei Power Co.， Ltd.， Kunming 650200， China zhousicheng53@163.com 
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    Abstract:An air-cooled proton exchange membrane fuel cell（PEMFC） model with a variable cathode outlet structure was designed with separate cooling channels and a variable cathode outlet area， enabling effective regulation of the moisture balance inside the cell while enhancing the cooling effect. In order to highlight the characteristics of the outlet variable structure， single-cell models of the original structure and the outlet variable structure were calculated. At an output voltage of 0.6 V， the average temperature of the outlet variable structure model was 6 ℃ lower than that of the original structure model， and the average water content of the outlet variable structule model increased by 0.78. At a load current density of 1.046 A/cm2， the power density of the outlet variable structure model was improved by 2.20% over the original structure model. Moreover， in the high-temperature and dry environment， the power density of the variable outlet structure model with a baffle height of 1.1 mm was 2.30% higher than that of the model with a baffle height of 0.3 mm. The results indicate that the variable outlet structure can improve the cell performance by enhancing the cooling performance and water retention performance of the cell， and it has better environmental adaptability in complex environments.
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