A pressure vessel containing compressed fluid includes: a plurality of tank cells, each of the tank cells extending along a first direction and disposed along a second direction perpendicular to the first direction, each of the tank cells containing compressed fluid; and a sheet-like fixation member wound around a periphery of the tank cells and configured to integrally bind the tank cells. A gap extending along the first direction is provided between two of the tank cells adjacent to each other and the fixation member. A reinforcement member is provided on an inner surface of the fixation member, the reinforcement member extending in the gap in the first direction and protruding toward the two adjacent tank cells. A surface of the reinforcement member is positioned away from each of surfaces of the two adjacent tank cells.

The storage unit comprises an internal reservoir, an external reservoir, and a suspension suspending the internal reservoir from the external reservoir; The suspension comprises a link that includes a cuff made of a composite material with a central axis, a proximal link of a proximal axial end of the cuff to the internal reservoir; and a distal link of a distal axial end of the cuff to the external reservoir. The proximal link comprises a body closing the proximal axial end of the cuff, the body having an external surface defining an external tapered bearing surface coaxial with the central axis and engaged inside the proximal axial end. The proximal link further comprises a ring connected to the internal reservoir, the ring having an internal surface defining an internal tapered bearing surface coaxial with the central axis and surrounding the proximal axial end, the proximal axial end of the cuff is clamped between the external tapered bearing surface and the internal tapered bearing surface.