Generally speaking, the latent heat of vaporization is much greater than the latent heat of liquefaction in phase change energy storage. However, gas-liquid conversion requires a large space and requires high pressure resistance of the container. Multiple phase transitions are prone to the generation of non condensable gases. Therefore, solid-liquid phase transitions are often used for phase change heat storage; Phase change energy storage technology utilizes the latent heat of phase change materials to store or release energy during the phase change process. Among them, solid-liquid phase change materials (PCM) have the advantages of isothermal or approximately isothermal phase change process and high latent heat density, and are widely used in scenarios such as solar energy storage, industrial waste heat recovery, building energy conservation, and environmental or power fluctuations in electronic equipment.