The invention relates to a heat insulation plate, a battery module and a
battery pack. The heat insulation plate comprises a heat insulation frame, a composite heat conduction material layer and a heat shrinkage film. The heat insulation frame is a supporting frame with an opening. The
thermal shrinkage film is connected with the opening of the heat insulation frame so as to surround the heat insulation frame to form a containing cavity. The containing cavity is filled with the composite heat conduction material layer, when the temperature is within the normal temperature range, the compositeheat conduction material layer can play a good heat conduction role, and the composite heat conduction material layer and the heat insulation frame form at least one contact interface. When the environment temperature reaches a preset temperature, the
thermal shrinkage film deforms and falls off from the opening of the heat insulation frame, the composite heat conduction material layer is changedinto a
liquid state in phase, and the composite heat conduction material layer flows out from the opening of the heat insulation frame. At this time, only the heat-insulating frame remains on the heatinsulation plate, and the average heat
conductivity coefficient of the heat insulation plate is reduced, thereby suppressing heat propagation.