A Study on Accelerated Life Test of Spring Unit for Semi-Auto Sliding Mechanism of IT Devices

Abstract:

Recently, the demand for energy is growing at a very high rate all over the world. The fossil fuels eventually lead to the foreseeable depletion of limited fossil energy resources. Hydrogen is considered a promising candidate to remedy the depletion of fossil fuels. The bipolar plate is the second most important component of a proton exchange membrance (PEM) fuel cell stack after the membrance electrode assembly (MEA). Its primary roles are to supply reactant gases to the fuel cell electrodes and provide electrical connection between adjacent cells in the stack while removing product water from the cell and transferring away the heat of reaction. Historically, machined graphite had been chosen as a good compromise between all of these requirements, but alternatives are emerging. New materials are light metals. In this study, rubber pad forming process was employed as the manufacturing method for metallic bipolar plates. The rubber pad and the sheet metal plate were pressed together by the punch, and the repulsive force of the deformed rubber is loaded at the plate, and can contribute to improving formability. And then, its surface was coated with TiN. After coating process, the performance characteristics of single stack in the condition of PEMFC using the metal bipolar plate have been investigated.

• Periodical: Key Engineering Materials (Volumes 535-536)
• Pages: 177-180
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.535-536.177
• Online since: January 2013
• Authors: Yong Phil Jeon, Hyung Yoon Seo, Jong Deok Kim, Chung Gil Kang
• Keywords: Accelerated Life Test, IT Device, Semi Auto Mechanism, Spring Unit

References

[1] Scale of Handphone market (2010) http://www.mobileisgood.com/

[2] K.G. Merkley, K.W. Chase, E. Perry, An introduction to tolerance analysis of flexible assemblies, MSC world Users' Conf., MSC Software Corp., Newport Beach, CA, USA (1996).

[3] Z. Zou, E. Morse, Statistical tolerance Analysis using gapspace. 7th CIRP Seminar, ENS de Cachan, France (2001) 313-322.

[4] B.F. Bihlmaier, Tolerance analysis of flexible assemblies using finite element and spectral analysis, MS thesis, Brigham Young University (1999).

[5] J.P. McGuire Jr., Designing easily manufactured lenses using a global method in International Optical Design, Technical Digest (CD), Optical Society of America (2006).

DOI: 10.1364/iodc.2006.tua6

[6] H. Qiao, A systematic Computer-aided approach to cooling system optimal design in plastic injection molding, Int. J. Mechanical Science. 48 (2006) 430-439.

DOI: 10.1016/j.ijmecsci.2005.11.001