標題: Fabrication of micro-flow channels for metallic bipolar plates by a high-pressure hydroforming apparatus
作者: Hung, Jung-Chung
Lin, Chih-Chia
機械工程學系
Department of Mechanical Engineering
關鍵字: Fuel cell;High-pressure hydroforming apparatus;Metallic bipolar plate;Micro-flow channels
公開日期: 15-May-2012
摘要: High aspect-ratio micro-flow channels on bipolar plates have the advantage of improving fuel cell performance. This study forms micro-flow channels with a high aspect ratio by increasing the forming pressure during the hydroforming process. This study designs and constructs a mechanical apparatus to enable a two-stage pressure increase in the hydroforming process. A high-pressure container is designed with three-layered tapered cylinders to sustain 1230.17 MPa working pressures, and a special seal component is designed to seal the high-pressure fluid and maintain high pressure. The feasibility of this high-pressure hydroforming technique is verified in preliminary tests. The investigation indicates that the aspect ratio of micro-flow channels can reach 0.468 when a hydrostatic pressure of 250 MPa is applied. Compared with the maximum aspect ratio of 0.31 formed using the traditional hydroforming process, the aspect ratio of micro-flow channels in this study was 51% higher, which enables the fuel cells with metallic bipolar plates to meet both performance and manufacturing requirements. (C) 2012 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11536/15974
ISSN: 0378-7753
期刊: JOURNAL OF POWER SOURCES
Volume: 206
Issue: 
結束頁: 179
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