Variable volume hydrogen container or hydrogen compressor with improved hydrogen embrittlement resistance

A variable volume hydrogen container or hydrogen compressor with improved hydrogen embrittlement resistance, the variable volume hydrogen container or hydrogen compressor comprising:

• a variable vessel configured to expand due to hydrogen filling and to compress or discharge the hydrogen stored therein by hydrogen filling while contracting;
• a pressure vessel configured to receive the variable vessel, at least one of opposite ends of the pressure vessel being open;
• a vessel wire wound around the pressure vessel in a radial direction, the vessel wire being configured to increase rigidity of the pressure vessel;
• a vessel cap configured to seal the at least one open end of the pressure vessel;
• a vessel frame configured to support a vessel assembly constituted by the vessel cap and the pressure vessel while wrapping a circumference of the vessel assembly to prevent separation of the vessel cap from the pressure vessel;
• a frame wire wound around a circumference of the vessel frame, the frame wire being configured to increase rigidity of the vessel frame;
• an embrittlement blocking member disposed so as to overlap the vessel cap, the embrittlement blocking member being configured to block hydrogen from penetrating into the vessel cap due to internal pressure of the variable vessel or the pressure vessel;
• and
• a transmitted hydrogen discharge hole configured to discharge hydrogen that has been transmitted through the embrittlement blocking member to an outside before being introduced into the vessel cap.