| 摘要 |
A battery pack device includes a plurality of battery cells 1, a bind bar 4, and a regulation member 31. The plurality of battery cells 1 has a rectangular box exterior shape. The bind bar 4 couples the plurality of battery cells 1 to each other with the battery cells 1 being arranged side by side. When the battery pack 10 is secured onto a horizontal surface, the regulation member 31 regulates upward deviation of at least one of the battery cells 1, which is located in a central part of the battery pack in the side-by-side arrangement direction of the battery cells 1.
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