Phase change heat insulation pad capable of releasing pressure

The utility model relates to the technical field of power batteries, in particular to a pressure relief type phase change heat insulation pad which comprises a packaging layer and a phase change heat insulation composite core material, the phase change heat insulation composite core material is packaged by the packaging layer, and a pressure relief channel is reserved in the position, corresponding to the side end face of the phase change heat insulation composite core material, of the packaging layer. When the sealing edge is arranged at the position, corresponding to the side end face of the phase change heat insulation composite core material, of the packaging layer, the pressure relief channel is arranged on the sealing edge, and normal closing and self-opening of the pressure relief channel are achieved through the sealing edge structure; the pressure relief channel is arranged at the position, corresponding to the side end face of the phase-change heat-insulation composite core material, of the packagin