4.7 Article

Formability improvement in multi-stage stamping of ultra-thin metallic bipolar plate for proton exchange membrane fuel cell

Journal

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 47, Issue 94, Pages 40008-40025

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.09.163

Keywords

Formability; Multi-stage forming; Finite element method; Metallic bipolar plate; PEM fuel cell

Funding

  1. Korea Ministry of Trade, Industry and Energy through the Technology Innovation Pro-gram [P0022331]
  2. National Research Foundation (NRF) of Korea [2022R1C1C1012700]
  3. Korea Evaluation Institute of Industrial Technology (KEIT) [P0022331] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
  4. National Research Foundation of Korea [2022R1C1C1012700] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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In this study, a novel die design is proposed for the fabrication of ultra-thin metallic bipolar plates (BPP) for proton exchange membrane (PEM) fuel cells. Finite element simulations demonstrate that the multi-stage forming with the proposed die approach significantly improves the formability of ultra-thin BPP. The results indicate a more uniform thickness distribution and reduced springback, leading to the fabrication of high-quality metallic BPP and a relatively high fuel consumption efficiency.
Multi-stage stamping process is the promising technology to fabricate the metallic bipolar plate (BPP) for proton exchange membrane (PEM) fuel cell. In the present study, a novel die design in the pre-forming stage is proposed and its effect on the formability of ultra-thin metallic BPP is verified by the finite element (FE) simulations of micro-and macro-scale BPP channels. It reveals that the multi-stage forming with the proposed die approach significantly improve the formability of ultra-thin BPP. As a result, the more uniform thickness distribution and considerable reduction of springback are beneficial to the fabrication of high quality metallic BPP. Furthermore, the relatively high reaction efficiency (similar to 79.4%) of fuel cell stacks can be predicted, indicating the high fuel consumption. These findings demonstrate the feasibility and efficiency of the proposed die design in the fabrication of ultra-thin metallic BPP based on the perspectives of both the formability and energy efficiency. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

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