Energy conversion device, power system and vehicle

The utility model relates to the technical field of electronics, and provides an energy conversion device, a power system and a vehicle. The bridge arm converter is connected between the external battery and the motor, the bridge arm converter is connected with the motor through a plurality of outgoing lines, and the bridge arm converter and the external battery are jointly connected to an external direct-current charging port; the first switch module is arranged on at least one leading-out wire; and one end of the inductor is connected between the bridge arm converter and the first switch module, and the other end is connected with an external DC charging port. When the device is applied to a vehicle, the bridge arm converter can be reused in the processes of motor driving and direct-current battery charging of the vehicle, the circuit integration degree is improved, the circuit size is reduced, and the technical problems that existing automobile parts are low in integration degree and large in occupied spac