Power module, vehicle-mounted power supply and vehicle

The utility model relates to a power module, a vehicle-mounted power supply and a vehicle, the power module comprises a plurality of installation areas which are respectively provided with a power unit, each power unit is respectively provided with a switch tube wafer, and isolation structures are arranged among the plurality of installation areas so as to isolate the switch tube wafers of the power units. According to the above technical scheme, the isolation structure is used for separating the plurality of installation sections in the physical space, so that even if the switch tube wafer on the power unit is exploded due to accidental failure, the fragments of the exploded switch tube wafer can be blocked by the isolation structure due to the existence of the isolation structure, and the reliability of the switch tube wafer is improved. Therefore, the situation that the power module splashes to other installation areas and has adverse effects on electrical elements in other installation areas is avoided, and the use reliability of the power module is improved.