Thermal management structure with integrated channels

A structure comprising at least one thermal management element comprising a composite body made of a composite material containing at least one phase change material disposed in a rigid structuring matrix, such that the composite body is self-supporting regardless of the phase of the phase change material contained,

• the composite body comprises cavities, at least one cavity defines by itself a wall of a channel suitable for circulating a fluid,
• the composite body defining a tray which presents a thickness and opposite faces, said channels extending on at least one of the opposite faces of the tray, and
• wherein passages are formed in the thickness of the tray between the channels, the passages are through holes arranged to receive external elements to be in thermal exchange with the fluid.