A high-pressure tank includes a liner, a fiber layer, and a protective layer. The liner has an internal space to store a fluid. The fiber layer includes fibers wound around an outer surface of the liner, and a thermosetting resin that has been cured and covers surfaces of the fibers. The protective layer includes a porous member disposed on the fibers, the porous member having a plurality of pores extending through the porous member in a thickness direction of the porous member. The thermosetting resin has entered the pores.

A high-pressure tank includes a liner, a fiber layer, and a protective layer. The liner has an internal space to store a fluid. The fiber layer includes fibers wound around an outer surface of the liner, and a thermosetting resin that has been cured and covers surfaces of the fibers. The protective layer includes a porous member disposed on the fibers, the porous member having a plurality of pores extending through the porous member in a thickness direction of the porous member. The thermosetting resin has entered the pores.

A high-pressure gas tank module may include: a gas tank which stores high-pressure gas, the tank including a cylindrical side wall extending along a center axis of the tank, and an end wall located at an end of the side wall, wherein the end wall is curved outward in a dome-shape; a protector fixed on an outer surface of the end wall; and a boss located on the center axis and fixed on an inner surface of the end wall. The boss includes a joining surface joined to the inner surface, the protector includes a facing surface facing the end wall, wherein the facing surface includes a joining area joined to the outer surface and a non-joining area extending along the outer surface from the joining area toward the side wall, and the joining area faces the joining surface with the end wall interposed therebetween.

A high-pressure gas tank module may include: a gas tank which stores high-pressure gas, the tank including a cylindrical side wall extending along a center axis of the tank, and an end wall located at an end of the side wall, wherein the end wall is curved outward in a dome-shape; a protector fixed on an outer surface of the end wall; and a boss located on the center axis and fixed on an inner surface of the end wall. The boss includes a joining surface joined to the inner surface, the protector includes a facing surface facing the end wall, wherein the facing surface includes a joining area joined to the outer surface and a non-joining area extending along the outer surface from the joining area toward the side wall, and the joining area faces the joining surface with the end wall interposed therebetween.

A liner configuring member configuring a liner includes a main body section which is configured from a resin material and has both ends opened. That is, both ends of the main body section are, respectively, a first open end and a second open end. There is provided in a vicinity of the first open end a first flange section where a first annular recess is formed by a first bottom section and a first side section. On the other hand, there is provided in a vicinity of the second open end a second flange section where a second annular recess is formed by a second bottom section and a second side section.

A liner configuring member configuring a liner includes a main body section which is configured from a resin material and has both ends opened. That is, both ends of the main body section are, respectively, a first open end and a second open end. There is provided in a vicinity of the first open end a first flange section where a first annular recess is formed by a first bottom section and a first side section. On the other hand, there is provided in a vicinity of the second open end a second flange section where a second annular recess is formed by a second bottom section and a second side section.

A high-pressure vessel that includes a cylinder, at least one half-shell, and a substantially rotationally symmetrical insert member. The cylinder, forming a middle region of the high-pressure vessel, is composed of a multilayer composite plastic having a first barrier layer. The at least one half-shell is formed at an axial end of the cylinder, and is composed of a multilayer composite plastic having a second barrier layer. The substantially rotationally symmetrical insert member has a foot member at an end thereof which faces an interior of the high-pressure vessel. The foot member has a diameter that is greater than a diameter of a middle region of the insert member. The foot member is configured to substantially form a hollow cone or hollow cylinder and at least a first groove or recess filled with the multilayer composite plastic of the at least one half-shell, and which is configured to extend around at least in certain portions on an inner circumference of the foot member.

A high-pressure vessel that includes a cylinder, at least one half-shell, and a substantially rotationally symmetrical insert member. The cylinder, forming a middle region of the high-pressure vessel, is composed of a multilayer composite plastic having a first barrier layer. The at least one half-shell is formed at an axial end of the cylinder, and is composed of a multilayer composite plastic having a second barrier layer. The substantially rotationally symmetrical insert member has a foot member at an end thereof which faces an interior of the high-pressure vessel. The foot member has a diameter that is greater than a diameter of a middle region of the insert member. The foot member is configured to substantially form a hollow cone or hollow cylinder and at least a first groove or recess filled with the multilayer composite plastic of the at least one half-shell, and which is configured to extend around at least in certain portions on an inner circumference of the foot member.

A high-pressure gas tank includes: a liner having an internal space for holding a gas; a strengthening layer stacked on the liner and having carbon fibers and a first resin; an intermediate layer stacked on at least a part of the strengthening layer; and a protective layer stacked on the intermediate layer and having glass fibers and a second resin. The intermediate layer has higher gas permeability than the strengthening layer and the protective layer.

A high-pressure gas tank includes: a liner having an internal space for holding a gas; a strengthening layer stacked on the liner and having carbon fibers and a first resin; an intermediate layer stacked on at least a part of the strengthening layer; and a protective layer stacked on the intermediate layer and having glass fibers and a second resin. The intermediate layer has higher gas permeability than the strengthening layer and the protective layer.