| 摘要 |
PROBLEM TO BE SOLVED: To provide a shovel which mounts a power storage device preventing overcurrent in a step-up/step-down converter.SOLUTION: A power storage device 120 mounted to a shovel includes; a positive electrode side relay 91P which is connected between a positive electrode terminal of a capacitor 19 and a positive electrode side input terminal 104P of a step-up/step-down converter 100; a negative electrode side relay 91N which is connected between a negative electrode terminal of the capacitor 19 and a negative electrode side input terminal 104N of the step-up/step-down converter 100; a precharge relay 91C and a charge resistor 92 which are connected to each other in series and connected in parallel to the positive electrode side relay 91P or the negative electrode side relay 91N between the capacitor 19 and the step-up/step-down converter 100. A controller 30 controlling the step-up/step-down converter 100 prohibits activation of the step-up/step-down converter 100 when circuit resistance between the capacitor 19 and the step-up/step-down converter 100 is low. |
