Heat dissipation layout structure of water-cooling heat dissipation automobile DC-DC converter

The utility model discloses a heat dissipation layout structure of a water-cooling heat dissipation automobile DC-DC converter. The device comprises a shell assembly, a printed circuit board, a waterchannel cover plate, a lower sealing cover plate and a connecting terminal, the printed circuit board is installed on the lower side of the shell assembly, the water channel cover plate and the lowersealing cover plate are arranged on the upper side and the lower side of the shell assembly respectively and are installed and fixed through connecting screws, and the connecting terminal is arrangedon the side face of the shell assembly and is fixed through connecting screws; wherein a plurality of paths of Buck-Boost bidirectional conversion topology circuits are arranged in the printed circuitboard, each Buck-Boost bidirectional conversion topology circuit comprises an HV-Port high-voltage side, an LV-Port low-voltage side, Lm, Rcs and Mosfet, and two groups of Mosfet are arranged; the DC-DC converter is applied to