Hydrogen storage and supply device and corresponding assembly

A hydrogen storage and supply device comprising:

• an internal reservoir which internally delimits a storage volume configured to store liquid hydrogen;
• an external reservoir inside which the internal reservoir is arranged, wherein an intermediate space separates the internal reservoir from the external reservoir;
• thermal insulation interposed between the internal reservoir and the external reservoir;
• a heat exchanger, comprising a hydrogen circulation side provided with a hydrogen inlet and a hydrogen outlet, and a circulation side of a heat transfer fluid;
• a conduit that supplies the heat exchanger with hydrogen and having an external conduit received in the intermediate space, said external conduit having:
• an intermediate volume;
• an upstream section having an upstream upper end passing through the internal reservoir and fluidically connected to the storage volume, and an upstream lower end connected to the intermediate volume;
• and
• a downstream section connected to the intermediate volume and having a downstream upper end connected to the hydrogen inlet;
• and
• the downstream upper end being located at a first elevation, the upstream upper end being located at a second elevation, and the intermediate volume being located at a third elevation, lower than the first and second elevations.