Hydrogen storage tank having metal hydrides

A hydrogen storage tank by absorption into a hydrogen storage material, the tank having a longitudinal axis and comprising:

• an enclosure;
• and
• an inner structure provided within the enclosure, the inner structure comprising a plurality of stages and a heat exchange system within the inner structure,
• each stage comprising a plurality of compartments distributed into a plurality of rows directed along the longitudinal direction,
• each compartment comprising a bottom, two side walls, two transverse walls, and an opening, the bottom being configured to be provided under the opening, two adjacent compartments of a same row having a common transverse partition wall, two compartments of two adjacent rows being made integral through their side walls, plates being provided between two successive stages, forming for an upper stage a support and for a lower stage a cover, the plates configured to be substantially horizontal, the opening of each compartment having a higher transverse direction than that of the bottom of the compartment and an angle formed between each of side walls and the bottom being strictly higher than 90°,
• each compartment containing a hydrogen storage material,
• wherein volumes defined between two side walls of two rows of adjacent compartments and the support plate form heat transfer fluid flow ducts.