Vehicle-mounted power supply apparatus with upper and lower cooling channels and vehicle

A vehicle, comprising:

• a first-type load,
• a battery, and
• a vehicle-mounted power supply apparatus, comprising:
• a power conversion circuit,
• an upper-layer printed circuit board (PCB);
• a lower-layer PCB;
• a bottom cover;
• a cover plate;
• and
• a radiator,
• wherein the power conversion circuit comprises a plurality of power switching transistors and a plurality of transformers,
• wherein
• the upper-layer PCB and the lower-layer PCB are configured to bear the plurality of power switching transistors of the power conversion circuit;
• wherein the bottom cover comprises a bottom plate, a front side wall, a rear side wall, a left side wall, and a right side wall, the lower-layer PCB and the plurality of transformers are fastened to the bottom plate, and the upper-layer PCB and the radiator are sequentially stacked above the lower-layer PCB and the plurality of transformers;
• and
• wherein the radiator comprises an upper-layer cooling channel, the bottom cover comprises a lower-layer cooling channel, and the upper-layer cooling channel communicates with the lower-layer cooling channel in the bottom cover through the rear side wall,
• and wherein the radiator is accommodated in a gap between the cover plate and the upper-layer PCB, an outlet and an inlet of the upper-layer cooling channel are located at a same side as the radiator, and the outlet and the inlet are respectively configured to connect to respective ones of two radiator interfaces disposed on an upper surface of the rear side wall of the bottom cover;
• and
• the power conversion circuit is configured to output a first direct current and a second direct current, a voltage of the second direct current is higher than a voltage of the first direct current, the first direct current is used to be transmitted to the first-type load to supply power to the first-type load, and the second direct current is used to be transmitted to the battery to supply power to the battery.