Abstract: The present disclosure provides a vehicle battery management system. In a vehicle battery management system including a battery unit configured to supply power to an electric vehicle, and a controller configured to control the battery unit, the battery unit is divided into a first battery unit and a second battery unit, the first battery unit supplies power to a motor for generating driving force of the electric vehicle, the second battery unit supplies power to an outside of the electric vehicle, the controller performs a control operation so that power supplied from the first battery unit is supplied to the outside of the electric vehicle or power supplied from the second battery unit is supplied to the motor based on an SOC of each of the first battery unit and the second battery unit and state information of the electric vehicle.

Abstract: A transaxle-integrated cooling circulation system includes a drive motor, an inverter disposed on one surface of the drive motor and electrically connected with the drive motor, a speed reducer including a drive shaft connected with a rotary shaft of the drive motor and a driven shaft having a different RPM from the drive shaft, a first circulation channel extending to allow a lubricating fluid in the speed reducer to make contact with the drive motor, a second circulation channel that is connected with the first circulation channel and that passes through a contact surface between the drive motor and the inverter, and a third circulation channel that is connected with the second circulation channel and that introduces the lubricating fluid into the speed reducer again.

Abstract: An electric vehicle transmission system is disclosed. The electric vehicle transmission system is employing a planetary gear type speed reducer so as to implement first-gear shifting, second-gear shifting, or reverse shifting, thereby enabling reduced manufacturing costs of an electric vehicle while increasing the fuel efficiency of the electric vehicle, and also employing the planetary gear type speed reducer so as to implement forward and reverse shifting, thereby enabling reduced manufacturing costs of the electric vehicle while increasing the fuel efficiency of the electric vehicle.

Abstract: A transaxle-integrated cooling circulation system includes a drive motor, an inverter disposed on one surface of the drive motor and electrically connected with the drive motor, a speed reducer including a drive shaft connected with a rotary shaft of the drive motor and a driven shaft having a different RPM from the drive shaft, a first circulation channel extending to allow a lubricating fluid in the speed reducer to make contact with the drive motor, a second circulation channel that is connected with the first circulation channel and that passes through a contact surface between the drive motor and the inverter, and a third circulation channel that is connected with the second circulation channel and that introduces the lubricating fluid into the speed reducer again.

Abstract: The present invention relates to an electric vehicle transmission system employing a planetary gear type speed reducer so as to implement first-gear shifting, second-gear shifting, or reverse shifting, thereby enabling reduced manufacturing costs of an electric vehicle while increasing the fuel efficiency of the electric vehicle, and also employing the planetary gear type speed reducer so as to implement forward and reverse shifting, thereby enabling reduced manufacturing costs of the electric vehicle while increasing the fuel efficiency of the electric vehicle.