composite tank of pressurized gas and filling process

composite tank of pressurized gas storage, in particular for the storage of hydrogen under pressure, comprising a shell (2) inner and an outer layer (3) in such a mechanical reinforcement a composite material layer comprising glass fibers and / or carbon embedded in a resin, the container comprising a thickness (4, 14) of thermal protection comprising a phase change material ( "PCM"), characterized in that the thickness (4, 14) of thermal protection is located inside the tank (1) adjacent to the casing (2) internally, that is to say between the gas stored in the reservoir (1) and the layer (3) outside.