| 摘要 |
PROBLEM TO BE SOLVED: To suppress deterioration of a radiation performance.SOLUTION: A battery pack 30 comprises a counter weight 31. The counter weight 31 comprises a weight body 32 extending in a vertical direction. A first loading part 33, second loading part 34, third loading part 35, and fourth loading part 36, each of which protrudes from the body part 32, is provided with a space in a transverse direction at a face 32a in a thickness direction of the weight part 32. Of battery modules 60, two are loaded on the first loading part 33, second loading part 34, and third loading part 35, respectively. |
