▎ 摘　　要

NOVELTY - A thermal energy storage cell (10) comprises a concrete vessel (14), an eutectic composition contained in the concrete vessel and having a phase change of 500-1200 degrees C, and a heating element (16) charged to heat the eutectic composition. The density and specific heat of the eutectic composition is the highest of any eutectic without expansion and breakages. USE - Thermal energy storage cell. ADVANTAGE - The thermal energy storage cell includes the eutectic composition having high density and specific heat without expansion and breakages. DESCRIPTION OF DRAWING(S) - The drawings show a schematic top view of the opened thermal energy storage cell, schematic elevation view of the cell and schematic end view of the cell. Thermal energy storage cell (10) Concrete vessel (14) Heating element (16) Lid (20) Tube support (28)