| 摘要 |
In a battery constituted by accommodating power-generating elements consisting of an electrode assembly (41) and electrolyte, a battery case (1) is formed so as to have closed-end tubular outer shape with a plurality of projecting ridges (3) extending linearly on the case inner surface (2) so as to from the inner surface side of the case in the direction of the case wall thickness, the projecting ridges (3) being arranged on the opposite sides of the tube center (S) so as to be inclined with respect to the direction of the tube center such that the projecting ridges (3) mutually intersect and are connected at the intersections (9), thus forming a grid pattern. <IMAGE> |
