| 摘要 |
<P>PROBLEM TO BE SOLVED: To materialize a compact and inexpensive structure capable of regulating the movement of a battery in a battery case without influencing on the output performance of a battery pack, in the battery case storing a battery unit configured by a plurality of batteries. <P>SOLUTION: A battery case (2) includes a cylindrical side wall part (22). The side wall part (22) forms a storage space (24) which can store a battery unit (3) in which a plurality of columnar batteries (11) are laminated so as to make axes parallel with each other, in a state making the axes parallel with a bottom surface portion (21). On an inner surface of the side wall part (22) opposite to end portions in an axial direction of the batteries (11) of the side wall part (22), at a position corresponding to the end portions in the axial direction of the batteries (11), a plurality of ribs (23) (projecting portions) projecting out to an inner side of the storage space (24) is integrally formed with the inner surface of the side wall part (22) so as to position projecting end portions on a plane surface orthogonal to the axes of the batteries (11). <P>COPYRIGHT: (C)2013,JPO&INPIT |
