The fabrication of high-aspect-ratio micro-flow channels on metallic bipolar plates using die-sinking micro-electrical discharge machining
The fabrication of high-aspect-ratio micro-flow channels on metallic bipolar plates using die-sinking micro-electrical discharge machining
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DOI：
10.1016/j.jpowsour.2011.09.065
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发表时间：
2012-01-15
影响因子：
9.2
通讯作者：
Chuang, Yin
中科院分区：
文献类型：
--
作者：
Hung, Jung-Chung;Chang, Dyi-Huey;Chuang, Yin
本研究探讨了一种相对快速的加工技术--沉模微细电火花加工技术制造微型金属双极板的可行性。流场为三通道蛇形结构，在20 mm×20 mm的反应区内，肋骨和通道宽度均为500微米，通道深度为600微米(高宽比=1.2)。该方法的材料去除速率可达7.2 mm(3)min(-1)。然而，高的材料去除速率也会增加流道的表面粗糙度。在单电池测试中，表面粗糙度为0.715和0.994微米Ra的流道的峰值功率密度分别为674 mW cm(-2)和647 mW cm(-2)。尽管表面粗糙度的增加降低了电池的性能，但其影响在统计上并不显著。(C)2011爱思唯尔B.V.保留所有权利。
This study explores the feasibility of using a relatively rapid technique, die-sinking micro-electrical discharge machining, to fabricate miniature metallic bipolar plates. The flow field is a three-pass serpentine structure, of which both the rib and channel widths are 500 mu m and the channel depth is 600 mu m (aspect ratio = 1.2) in a reaction area of 20 mm x 20 mm. The material-removal rate of the proposed method can reach up to 7.2 mm(3) min(-1). However, a high material-removal rate also increases the surface roughness of flow channels. In single-cell tests, the peak power densities are 674 mW cm(-2) and 647 mW cm(-2) for flow channels with a surface roughness of 0.715 mu m Ra and 0.994 mu m Ra, respectively. Though the increase in surface roughness lowers cell performance, the effect is not statistically significant. (C) 2011 Elsevier B.V. All rights reserved.