High-pressure gas tank module

A high-pressure gas tank module comprising:

• a gas tank configured to store high-pressure gas, the gas tank comprising a cylindrical side wall extending along a center axis of the gas tank, and an end wall located at an end of the cylindrical side wall, wherein the end wall is curved outward in a dome-shape;
• a protector fixed on an outer surface of the end wall of the gas tank;
• and
• a boss located on the center axis and fixed on an inner surface of the end wall of the gas tank,
• wherein
• the boss comprises a joining surface joined to the inner surface of the end wall,
• the protector comprises a facing surface facing the end wall, wherein the facing surface includes a joining area joined to the outer surface of the end wall and a non-joining area not joined to the outer surface of the end wall, the joining area is located along an inner peripheral end of the facing surface, and the non-joining area extends along the outer surface from an outer peripheral end of the joining area to an outer peripheral end of the facing surface,
• the joining area of the protector faces the joining surface of the boss with the end wall interposed between the joining area and the joining surface, and
• any part of the protector is not joined to the outer surface of the end wall in a region located radially outside a boundary between the joining area and the non-joining area.