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Life Design and Evaluation Method of Type 3 High-Pressure Hydrogen Tank for Fuel Cell Electric Vehicle

Article of Honda R&D Technical Review Vol.26 No.1

Summary

Failure in Type 3 high-pressure hydrogen tanks occurs as a result of the growth of cracks in the boss of the liner or the cylinder until the liner is penetrated. The boss of the liner is prone to exposure to corrosive environments, for example by being splashed with water during driving. For this reason, it is essential to evaluate the life of a tank until a leak occurs with consideration of the corrosive environments in an actual vehicle. A life design method based on the mechanism of failure of the boss, in which evaluations
are conducted with consideration of stress corrosion cracking and sustained load cracking, was therefore developed. The correlation between the results produced by the method and the results of tests using a Type 3 high-pressure hydrogen tank was examined, demonstrating the validity of the method. This paper also discusses a method of evaluation of Type 3 high-pressure hydrogen tanks that considers their fatigue characteristics in the type of corrosive environments occurring in actual vehicles.

Reference

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Author (organization or company)

Toshihiko KANEZAKI(Automobile R&D Center)、Satomi MANO(Automobile R&D Center)、Kazuo MIYAGAWA(Automobile R&D Center)、Noboru HAYASHI(Automobile R&D Center)、Takeshi OGAWA(Aoyama Gakuin University)

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