▎ 摘　　要

NOVELTY - Heat storage core comprises an outer shell (5), a core phase transition region (6) and a miscible layer (7) arranged between the outer shell and the core phase transition region. The outer shell is composed of a framework material, and the core phase transition region is composed of a core material. The phase transition temperature of the framework material is greater than the phase transition temperature of the core material. The miscible layer is a composite material comprising a framework material and a core material. The content of the core material in the miscible layer gradually increases from the shell to the core phase transition region. USE - Used as heat storage core. ADVANTAGE - The heat storage core overcomes the defects of sacrificing more latent heat and structural instability in the prior art, and the content of the core material in the miscible layer gradually increases from the shell to the core phase transition zone. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing the heat storage core, comprising (1) mixing the core material and the framework material in different proportions, (2) spreading the raw materials with different core material contents to obtain the framework material on the periphery, the interior is the core material, and the junction area between the outer periphery and the interior is the structure of the composite material, and (3) pressing the structure formed in step (2) to obtain the heat storage core; heat storage module, comprising heat storage core; and heat storage system, comprising multiple heat storage cores, a heating element, a power supply and a heat exchange pipeline, multiple of the heat storage cores form a heat storage array, the heating elements are arranged in the heat storage array, the power source is connected to the heating element, and the heat exchange pipeline is connected to the heat storage array. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic longitudinal sectional view of the heat storage core when the forming die is in use. 5Outer shell 6Core phase transition region 7Miscible layer