Fabrication of Bipolar Plates of the Fuel Cell from Stainless Steel 304 by Hot Metal Gas Forming Process

Document Type : Research Article

Authors

1 Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Ira

2 Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran

Abstract

The hot forming of a sheet metal with gas blowing is a novel method in metal forming processes. It has the ability to manufacture products with complex shapes due to high formability and a low flow stress at high temperature. In this research, the forming of bipolar plates with a slotted serpentine pattern by hot metal gas forming process has been investigated experimentally. To this end, 304 stainless steel sheets with 0.12 mm thickness have been used. In order to evaluate the geometric and process parameters effect on forming trend, a convex die that includes three slotted serpentine channel with different widths has been manufactured. Then experiments were carried out at different temperatures, pressures and periods of time. The sheet thinning percentage, the thickness distribution and the depth of die filling have been considered as evaluation criteria of experiments results. The results indicated that the temperature and the forming time have respectively the most and the least effect on the formability. Among three slots with widths of 1, 1.5 and 2 mm, despite slot with 2mm width has the most die filling percentage, the sheet thinning percentage is less than the slot with 1.5 mm width. The most filling percentage of die channel with the amount of %88.8 was observed in the slot with the width of 2 mm at a temperature of 1000 oC, the pressure of 40 bar and forming the time of 30 min.

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References

[1] X. Li, I. Sabir, Review of bipolar plates in PEM fuel cells: Flow-field designs, International Journal of Hydrogen Energy, 30(4) (2005) 359-371.
[2] J.-C. Hung, T.-C. Yang, K.-c. Li, Studies on the fabrication of metallic bipolar plates—Using micro electrical discharge machining milling, Journal of Power Sources, 196(4) (2011) 2070-2074.
[3] C. -K. Jin, C. -G. Kang, Fabrication process analysis and experimental verification for aluminum bipolar plates in fuel cells by vacuum die-casting, Journal of Power Sources, 196(20) (2011) 8241-8249.
[4] Y.-M. Lee, S.-J. Lee, C.-Y. Lee, D.-Y. Chang, The multiphysics analysis of the metallic bipolar plate by the electrochemical micro-machining fabrication process, Journal of Power Sources, 193(1) (2009) 227-232.
[5] S.-J. Lee, C.-Y. Lee, K.-T. Yang, F.-H. Kuan, P.-H. Lai, Simulation and fabrication of micro-scaled flow channels for metallic bipolar plates by the electrochemical micro-machining process, Journal of Power Sources, 185(2) (2008) 1115-1121.
[6] S. Mahabunphachai, Ö.N. Cora, M. Koç, Effect of manufacturing processes on formability and surface topography of proton exchange membrane fuel cell metallic bipolar plates, Journal of Power Sources, 195(16) (2010) 5269-5277.
[7] L. Peng, X. Lai, D.a. Liu, P. Hu, J. Ni, Flow channel shape optimum design for hydroformed metal bipolar plate in PEM fuel cell, Journal of Power Sources, 178(1) (2008) 223-230.
[8] Y. Liu, L. Hua, Fabrication of metallic bipolar plate for proton exchange membrane fuel cells by rubber pad forming, Journal of Power Sources, 195(11) (2010) 3529-3535.
[9] S.-W. Choi, S.H. Park, H.-S. Jeong, J. Cho, S. Park, M.Y. Ha, Improvement of formability for fabricating thin continuously corrugated structures in sheet metal forming process, Journal of mechanical science and technology, 26(8) (2012) 2397-2403.
[10] T.-C. Chen, J.-M. Ye, Analysis of Stainless Steel Bipolar Plates Micro-Stamping Processes, Przegląd Elektrotechniczny, 88 (2012) 121-126.
[11] L. Ravi Narayan, Forming of Ferritic Stainless Steel Bipolar Plates, (2012).
[12] M. B. Owsia, S. J. Hosseinipour, M. B. Jooybari, A. Gorji, Forming of metallic bipolar plate with pin-type pattern by using hydroforming process in convex die, Modares Mechanical Engineering, 14(10) (2014) 150-158. [In Persian]
[13] N. Mohammadtabar, M. B. Jooybari, S. J. Hosseinipour, A.H. Gorji, Study of effective parameters in hydroforming of fuel cell metallic bipolar plates with parallel serpentine flow field, Modares Mechanical Engineering, 14(8) (2014) 17-27. [In Persian]
[14] S. Mahabunphachai, M. Koç, Fabrication of micro-channel arrays on thin metallic sheet using internal fluid pressure: Investigations on size effects and development of design guidelines, Journal of Power Sources, 175(1) (2008) 363-371.
[15] Y. Liu, L. Hua, J. Lan, X. Wei, Studies of the deformation styles of the rubber-pad forming process used for manufacturing metallic bipolar plates, Journal of Power Sources, 195(24) (2010) 8177-8184.
[16] L. Peng, P. Hu, X. Lai, J. Ni, Fabrication of metallic bipolar plates for proton exchange membrane fuel cell by flexible forming process-numerical simulations and experiments, Journal of Fuel Cell Science and Technology, 7(3) (2010) 031009.
[17] Z.-b. HE, X.-b. FAN, F. SHAO, K.-l. ZHENG, Z.-b. WANG, S.-j. YUAN, Formability and microstructure of AA6061 Al alloy tube for hot metal gas forming at elevated temperature, Transactions of Nonferrous Metals Society of China, 22 (2012) s364-s369.
[18] M. S. Zoei, M. Farzin, A.H. Mohammadi, Finite element analysis and experimental investigation on gas forming of hot aluminium alloy sheet, Modares Mechanical Engineering, 11(2) (2011) 49-56. [In Persian]
[19] S. Esmaili, S.J. Hosseinipour, A.S. Sarband, Simulation and manufacturing of fuel cell bipolar plates with method of gas forming, in: National Conference of Mechanical Engineering, Malayer, Iran, 2013. [In Persian].
Amirkabir Journal of Mechanical Engineering
Volume 50, Issue 3
September and October 2018
Pages 589-600

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