HEAT DISSIPATION STRUCTURE, HIGH-VOLTAGE DISTRIBUTION BOX, BATTERY, AND ELECTRICAL DEVICE

A heat dissipation structure includes a housing configured to form an accommodation cavity and a heat source disposed in the accommodation cavity. The heat source includes a heat dissipation surface, and the heat source includes a first connecting portion. The heat dissipation structure further includes a heat transfer block inserted in the housing and including at least one surface exposed outside the housing, a first heat transfer surface, and a second connecting portion. The first connecting portion is connected to the second connecting portion directly or through a connecting piece so that the first heat transfer surface keeps in close fit with the heat dissipation surface.