Heat dissipation structure, high-voltage distribution box, battery, and electrical device

A heat dissipation structure, comprising:

• a housing, configured to form an accommodation cavity, wherein the housing comprises a wall assembly, the wall assembly wraps around to form a mounting through-hole;
• a heat source, wherein the heat source is disposed in the accommodation cavity, the heat source comprises a heat dissipation surface, and the heat source comprises a first connecting portion;
• a heat transfer block inserted in the housing and disposed in the mounting through-hole, and the wall assembly is in close fit with an outer wall of the heat transfer block, the heat transfer block comprises at least one surface exposed outside the housing, the heat transfer block comprises a first heat transfer surface, and the heat transfer block comprises a second connecting portion;
• and
• a heat transfer plate, the heat transfer block further comprises a second heat transfer surface located outside the accommodation cavity, and the second heat transfer surface is in close fit with the heat transfer plate;
• wherein 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.