Abstract: The present disclosure relates to a power supply device for hybrid construction machinery, and more particularly, to a power supply device for hybrid construction machinery, which is capable of reducing engine loads and facilitating improvement of engine efficiency by excluding a starting motor used in general hybrid construction machinery and an alternator for charging a battery from hybrid construction machinery, such as a hybrid excavator or vehicle, which commonly uses an engine and an electric motor as a power source and includes an electric energy storage device, and a method for the same.

Abstract: The present disclosure relates to a power supply device for hybrid construction machinery, and more particularly, to a power supply device for hybrid construction machinery, which is capable of reducing engine loads and facilitating improvement of engine efficiency by excluding a starting motor used in general hybrid construction machinery and an alternator for charging a battery from hybrid construction machinery, such as a hybrid excavator or vehicle, which commonly uses an engine and an electric motor as a power source and includes an electric energy storage device, and a method for the same.

Abstract: The present disclosure prevents an inrush current generated when one side is completely discharged, or charged voltages are different from one another because a DC link capacitor and an ultra-capacitor are directly connected to each other, by driving a load motor after completing initial charging by making each voltage the same through the performing of switching between a DC link capacitor and an ultra-capacitor during initial ignition, so as to safely perform initializing regardless of the charged-discharged state of an electricity storage device during initial ignition.

Abstract: The present disclosure prevents an inrush current generated when one side is completely discharged, or charged voltages are different from one another because a DC link capacitor and an ultra-capacitor are directly connected to each other, by driving a load motor after completing initial charging by making each voltage the same through the performing of switching between a DC link capacitor and an ultra-capacitor during initial ignition, so as to safely perform initializing regardless of the charged-discharged state of an electricity storage device during initial ignition.