| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrically-driven construction machine capable of preventing an electric current from flowing around to a connector where no external power supply is connected through a junction part of power transmission systems.SOLUTION: Power transmission systems 71A, 71B, and 71C connected to connectors 59A, 59B, and 59C join a shared system 73 and is then connected to a control device 35 having a battery charging function. The power transmission systems 71A, 71B, and 71C are provided with switches 74Aa, 74Ab, 74Ba, 74Bb, and 74Ca, 74Cb. When the plug of an external power source is connected to one of the connectors 59A, 59B, and 59C, a relay circuit 75A, 75B or 75C supplies electric power to a coil of a corresponding control relay (76A, 76B, or 76C) through connection between a connector-side and a plug-side terminal for connection detection, the control relay switches its contact into a closed state, and a coil of the corresponding switch is supplied with electric power through the contact, so that a contact of the switch is switched into a closed state. |
