| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery pack which is improved in capacity density while being equipped with a bottom frame in which a finger hooking recessed part is formed.SOLUTION: A battery pack 1 includes: a unit battery 10 whose opening of a battery case 10a is sealed by a sealing plate 10b; and a bottom frame 40 covering a bottom surface 10c on the side opposite to the sealing plate of a unit cell. In an area opposite to the bottom surface of the bottom frame of the unit cell, a through-hole 41 is formed which penetrates through the bottom frame. |
