Apparatus for supplying power for electricity construction heavy equipments

摘要

The present invention relates to a power supply device for an electric excavator, wherein the power supply device for the electric excavator comprises: a power supply unit for supplying power from a battery to an electric motor; A first charging port connected to the power supply and supplying first external power to the battery; An OBC connected to the power supply and converting to DC when AC power is input; And a second charging port connected to the OBC and supplying a second external power to the OBC, wherein the power supply unit comprises a charging power of the OBC based on an amount of power required by the electric motor and an amount of charging power of the OBC. Alternatively, the charging power of the OBC and the battery power are supplied to the electric motor.