Fabrication of micro-flow channels on graphite composite bipolar plates using microplaning  

作　　者：万珍平 梁德杰 陆龙生 汤勇 

机构地区：[1]School of Mechanical and Automotive Engineering, South China University of Technology

出　　处：《Journal of Central South University》2015年第8期2963-2970,共8页中南大学学报（英文版）

基　　金：Project(51075155)supported by the National Natural Science Foundation of China;Project(2013ZZ017)supported by the Fundamental Research Funds for the Central Universities,China

摘　　要：A new method of manufacturing micro-flow channels on graphite composite bipolar plate(GCBPP) microplaning using specially designed multi-tooth tool is proposed. In this method, several or even dozens of parallel micro-flow channels ranging from 100 μm to 500 μm in width can be produced simultaneously. But, edge chippings easily occur on the rib surface of GCBPP during microplaning due to brittleness of graphite composites. Experimental results show that edge chippings result in the increase of contact resistance between bipolar plate and carbon paper at low compaction force. While the edge chippings scarcely exert influence on the contact resistance at high compaction force. Contrary to conventional view, the edge chippings can significantly improve performance of microfuel cell and big edge chippings outperform small edge chippings. In addition, the influence of technical parameters on edge chippings was investigated in order to obtain big, but not oversized edge chippings.A new method of manufacturing micro-flow channels on graphite composite bipolar plate（GCBPP） microplaning using specially designed multi-tooth tool is proposed. In this method, several or even dozens of parallel micro-flow channels ranging from 100 μm to 500 μm in width can be produced simultaneously. But, edge chippings easily occur on the rib surface of GCBPP during microplaning due to brittleness of graphite composites. Experimental results show that edge chippings result in the increase of contact resistance between bipolar plate and carbon paper at low compaction force. While the edge chippings scarcely exert influence on the contact resistance at high compaction force. Contrary to conventional view, the edge chippings can significantly improve performance of microfuel cell and big edge chippings outperform small edge chippings. In addition, the influence of technical parameters on edge chippings was investigated in order to obtain big, but not oversized edge chippings.

关 键 词：microfuel cell graphite composite bipolar plate micro-flow channel microplaning edge chipping 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TB33[一般工业技术—材料科学与工程]