High-pressure heat-storing/or cold-storing device

The invention discloses a high-pressure heat-storing/or cold-storing device, which belongs to the field of high/low-temperature thermal energy storage. The high-pressure heat-storing/or cold-storing device is characterized in that an outer shell is used for bearing a high pressure; a cooling/heating liquid layer, a heat-preserving layer, a thin wall inner shell and an internal solid heat/cold storing medium are arranged in sequence from outside to inside; a solid material is taken as a heat/cold storing medium; and a high-pressure heat transfer medium flows through the surface of the heat/cold storing medium and undergoes heat exchange. The heat-storing/or cold-storing device disclosed by the invention has the advantages of high bearing pressure, low manufacturing cost, high efficiency, high thermal energy grade and the like, and is particularly suitable for heat-storing/or cold-storing occasions with large heat/cold storing and releasing temperature differences and frequent heat/cold storing and releasing.