Module for thermal storage by a phase-change material whose manufacture is simplified

A method for manufacturing a module including:

• a vat,
• at least one heat-exchanger including first and second connecting ends configured to be connected to a heat-transfer fluid network, the first and second connecting ends penetrating and opening into the vat, and
• a structure received in the vat and configured to contain a phase-change material, the structure comprising a porous matrix with communicating cells crossed by the heat-exchanger and in contact with an external surface of the heat-exchanger, and the matrix being obtained by moulding around the heat-exchanger, and the vat comprising at least one wall made of a material formed by moulding directly on the porous matrix, the method including:
• providing a preform comprising plates of cores and at least one heat-exchanger between the cores,
• setting up the preform in a mould,
• introducing a liquid metal in the preform,
• solidifying the metal, and
• removing the cores.