| 摘要 |
PROBLEM TO BE SOLVED: To inhibit diffusion of a discharged object discharged from a case in which battery cells are stored.SOLUTION: A power supply device 30 includes: a counter weight 41 for adjusting a balance with a cargo; and a battery unit 51. The counter weight 41 includes a bottom part 42 having a rectangular parallelepiped block shape. In the bottom part 42, a wall part 43 having a rectangular parallelepiped shape is erected and a placement part 44, on which the battery unit 51 is placed, is provided so as to be spaced a predetermined distance away from the wall part 43. The battery unit 51 is placed on the placement part 44. In the battery unit 51, a battery module 54 composed of multiple battery cells 53 is stored in a case 52. A through hole 57 is formed on a side wall 52a of the case 52. A wall part 43 of the counter weight 41 faces the through hole 57. |
