2007 Volume 32 Issue 1 Pages 33-40
It is a matter of great urgency to develop Fuel Cell Vehicle(FCV) which has same safety, functional and economical level with existing gasoline vehicle and it is concerned that the most realistic Hydrogen storage method is to use high pressured Hydrogen. In other words, the performance improvement of high pressured vessel for FCV is required. And there is no doubt that safety issue is essential for the performance improvement.
Because “there is a long history of 25years”, “ there is actual result of 6 million vessels usage in this world” “ can be designed Leak Before Burst theory”, Samtech Corporation has been working, based on aluminum-carbon fiber composite vessel (hereinafter Type3) on development of vessel performance improvement by securing safety.
This time we set the target on the Hydrogen weight efficiency of high pressured vessel by using high performance aluminum liner , aimed at improvement of aluminum fatigue. Then we tested 4 types of aluminum liners with fatigue proof test and corrosion proof test on each liner. As a result, 6069 aluminum liner showed the best performance. This 6069 aluminum liner has also had good performance on Hydrogen embrittlement proof.
Therefore we decided to make 35MPa -6069 aluminum liner similar weight as 6061 liners. We performed burst test and cycle test on this vessel according to JARI S001 Hydrogen Standard and confirmed safety accordingly. Afterwards we tried cycle test on the same vessel with higher pressure and confirmed safety issue and possibility of weight efficiency improvement. Here we would like to present our report.
