Method for producing a pressure accumulator, and pressure accumulator

A method for producing a pressure accumulator, suitable for storing hydrogen in motor vehicles,

• in which first, by means of a plastic blow-molding process, a liner of the pressure accumulator is produced, which has at least one pole cap, and
• then the outside of the liner is provided with a multilayered reinforcing layer produced by means of braiding,
• wherein before the reinforcing fibers are applied, a fiber supply cap is applied to the pole cap whose outer surface is spaced apart from a pole region of the pole cap;
• during the application of the reinforcing layer, the reinforcing fibers are placed onto a body of the liner and in the pole region, are correspondingly placed onto an outer surface of the fiber supply cap so that because of the distance between the outer surface of the fiber supply cap and the pole region of the pole cap, inner plies of the reinforcing layer composed of the reinforcing fibers are provided with a fiber supply in the pole region, and wherein the fiber supply cap and the pole cap together form a cavity during the application of the reinforcing layer, wherein during the application of the reinforcing layer, the fiber supply cap is immobilized by an immobilizing device, which ensures the spacing of the fiber supply cap from the pole region during this process step, wherein after the application of the reinforcing layer, the liner is inserted into a tool surrounding the reinforcing layer and is acted on with an internal positive pressure so that due to the internal positive pressure, the pressure accumulator rests against the tool having an inner surface and the immobilizing device is released after the application of the reinforcing layer and because of the internal positive pressure in the liner, the fiber supply cap is slid into the pole region and the fiber supply is thus uncovered.