According to a first aspect, an embodiment of this application provides an energy conversion apparatus, including a three-phase bridge arm converter, a motor winding, a two-phase two-bridge-arm converter, and a transformer. A direct current port of the three-phase bridge arm converter is connected to a battery; an alternating current port of the three-phase bridge arm converter is connected to the motor winding; a direct current port of the two-phase two-bridge-arm converter is connected to the battery; an alternating current port of the two-phase two-bridge-arm converter is connected to a secondary-side winding of the transformer; and a primary-side winding of the transformer is connected to an alternating current charging port.

The energy conversion apparatus provided in the first aspect of this application may integrate a motor drive function by using the three-phase bridge arm converter and the motor winding, and integrate an alternating current charging function by using the two-phase two-bridge-arm converter and the transformer. In this way, the energy conversion apparatus can integrate the charging function and the motor drive function. When the energy conversion apparatus is installed on an electric vehicle, a vehicle integration level can be increased, a structure layout of the electric vehicle can be simplified, and costs and a volume of the electric vehicle can be reduced.