| 摘要 |
A battery (10) comprises: insulation plates (20, 30), connection terminal plates (18, 19), terminal bolts (40), and nuts (60). Each bolt head (43) is positioned between each insulation plate (20, 30) and each connection terminal plate (18, 19), and has a regular N-polygon, where N is an even number. Each insulation plate (20, 30) has a first rotational stop wall included adjacent to a first end part of the insulation plate (20, 30), and has a first contact place and a second contact place. The first contact place is in contact with the bolt head (43) when the bolt head (43) is rotated in a coupling direction of the nuts (60). The second contact place is in contact with the bolt head when the bolt head (43) is rotated in a releasing direction. A distance from the first contact place to the first end is longer than a distance from the second contact place to the first end. According to the present invention, generation of a crack or a breakage on a rotation stop plate installed in the insulation plate is restricted. |
