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钢带间距对质子交换膜燃料电池堆封装力的影响

作者:柳海涛,白书战,吴明华,杨荣昌,郗富强  发布时间:2025-10-02   编辑:赵玉真   审核人:郎伟锋    浏览次数:

钢带间距对质子交换膜燃料电池堆封装力的影响

柳海涛1,2,白书战1*,吴明华2,杨荣昌2,郗富强2

1.山东大学核科学与能源动力工程学院,山东 济南  250061;

2.山东国创燃料电池技术创新中心,山东 潍坊  261000

摘要:为提高质子交换膜燃料电池堆的效率稳定性和使用寿命,以典型大型质子交换膜燃料电池堆为研究对象,采用等效刚度模型,仿真分析电堆封装力及其分布,计算不同封装力下的孔隙率和接触电阻,提出燃料电池堆在不同钢带间距条件下的最佳封装力及其选取准则。分析结果表明:钢带间距增大,对应的最优封装力呈增大趋势;钢带间距为40 mm时,最优封装力为32.8 kN,通过应力标准差和应变标准差判断该封装力在合理范围内,此时对应的接触电阻为5.35 μΩ,孔隙率为0.747。

关键词:燃料电池;等效刚度模型;封装力;孔隙率;接触电阻;钢带间距

The influence of steel strip spacing on the clamping load of a proton exchange membrane fuel cell stack

LIU Haitao1,2, BAI Shuzhan1*, WU Minghua2, YANG Rongchang2, XI Fuqiang2

1. School of Nuclear Science, Energy and Power Engineering, Shandong University, Jinan 250061, China;

2.Shandong Guochuang Fuel Cell Technology Innovation Center Co., Ltd., Weifang 261000, China

Abstract: To improve the efficiency, stability, and service life of proton exchange membrane fuel cell stacks, a typical large-scale proton exchange membrane fuel cell stack is taken as the research object. An equivalent stiffness model is used to analyze the magnitude of the clamping load of the stack and its uniform distribution in the stack components. At the same time, the porosity and contact resistance values corresponding to different stack clamping load are calculated. The optimal clamping load values and selection criteria for fuel cell stacks under different steel strip spacing conditions are proposed. The results show that as the spacing between steel strips increases, the corresponding optimal clamping load shows an increasing trend. Taking the spacing between steel strips of 40 mm as an example, the corresponding clamping load of 32.8 kN is optimal, and the clamping load is judged to be within a reasonable range based on the stress standard deviation and strain standard deviation. At this point, the corresponding contact resistance is 5.35 μΩ, and the porosity is 0.747.

Keywords: fuel cell; equivalent stiffness model; clamping load; porosity; contact resistance; steel strip spacing

            

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