| 摘要 |
PROBLEM TO BE SOLVED: To avoid mutual displacement of batteries. SOLUTION: A hemispherical convex part 3 is formed for an positive electrode part 2 arranged on a left side face of a battery 1. On the other hand, a concave part 5 cut out in a hemispherical convex part 3 can be pressure- engaged is formed in a negative electrode part 4 arranged on a right side face of the battery 1. Thus, when plural batteries 1 are arranged, the convex part 3 and the concave part 5 are engaged with each other, and each battery 1 is positioned and simultaneously is connected in series. |
