Pan Guoqing, Wang Zhengwei, Wen Donghui
Special Equipment Institute, Hangzhou Vocational & Technical College, Hangzhou 310018, China.
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China.
Materials (Basel). 2022 Aug 26;15(17):5922. doi: 10.3390/ma15175922.
: A bipolar plate with fractal-characterized microstructures can realize intelligent energy transmission and obtain a high efficiency of proton-exchange membrane fuel cells. In this paper, fixed abrasive lapping technology is proposed to fabricate a surface microstructure on a bipolar plate with fractal characteristics. : The kinematics of the fixed abrasive lapping process was developed and employed to numerically investigate the particle trajectories moving on the target surface by considering the different arraying forms of diamonds on the lapping plate. : It was found from an analysis of both the uniformity and the fractal characteristics that the arraying form of diamonds on the lapping plate, with the distribution of latitude and longitude with an angle of 30° and a gap of concentric circles of 40 mm with a minimum radius of 70 mm and maximum radius of 190 mm, can be used to obtain the best uniformity and fractal characteristics in the fixed abrasive lapping of a bipolar plate. : The distribution of the latitude and longitude of 40° and 30° considered in this study is expected to realize the best machining performance in the bipolar plate and present good cell performance.
具有分形特征微观结构的双极板能够实现智能能量传输，并使质子交换膜燃料电池获得高效率。本文提出采用固定磨料研磨技术在具有分形特征的双极板上制备表面微观结构。开发了固定磨料研磨过程的运动学，并通过考虑研磨盘上金刚石的不同排列形式，对在目标表面上移动的颗粒轨迹进行数值研究。通过对均匀性和分形特征的分析发现，研磨盘上金刚石的排列形式为纬度和经度分布呈30°角、同心圆间距为40mm、最小半径为70mm、最大半径为190mm时，可在双极板的固定磨料研磨中获得最佳的均匀性和分形特征。本研究中考虑的40°和30°的纬度和经度分布有望在双极板中实现最佳加工性能，并呈现良好的电池性能。
