Power supply management apparatus and method thereof

An apparatus includes an onboard energy storage device 102; an onboard power conversion device 136 configured to be electrically coupled to an external power source 12 for receiving electrical power therefrom; and at least one drive system 30 electrically coupled to the onboard energy storage device 102 and the onboard power conversion device 136, wherein the onboard energy storage device 102 and the onboard power conversion device 136 cooperatively provide electrical power for the at least one drive system 30. A vehicle and a method for managing power supply are also disclosed.