SECONDARY BATTERY AND MANUFACTURING METHOD FOR THE SAME

PROBLEM TO BE SOLVED: To provide a film-coated secondary battery that can simplify production facilities and enhance productivity as compared with the prior art.SOLUTION: A secondary battery 100 includes a battery case 10, external terminals 20 arranged on one terminal face 10t of the battery case 10, and a single stretchable film 1 covering the battery case 10. The film 1 has a covering portion 2 covering from a bottom face 10b to a terminal face 10t of the battery case 10, the bottom face being opposed to the terminal face 10t, and a surplus portion 3 extending from the terminal face 10t in a direction perpendicular to the terminal face 10t. There are joined surplus portions 3 which extend in one direction (X-axis direction) along the terminal face 10t and face each other in a film cutting direction (Y-axis direction) crossing the one direction and along the terminal face 10t. An opening portion 5 through which the upper end portion of the external terminal 20 is exposed from the film 1 is formed by the surplus portions 3 which intersect the film cutting direction and extend in the direction along the terminal face 10t.SELECTED DRAWING: Figure 1 【課題】従来よりも生産設備の簡略化及び生産性の向上が可能な、フィルムで被覆された二次電池を提供する。【解決手段】電池容器１０と、該電池容器１０の一の端子面１０ｔに配置された外部端子２０と、電池容器１０を被覆する一枚の伸縮性のフィルム１と、を備えた二次電池１００である。フィルム１は、端子面１０ｔと反対側の電池容器１０の底面１０ｂから端子面１０ｔまでを覆う被覆部２と、端子面１０ｔから端子面１０ｔに垂直な方向に沿って延出する余剰部３とを有する。端子面１０ｔに沿う一方向（Ｘ軸方向）に延在するとともに該一方向に交差しかつ端子面１０ｔに沿うフィルム切断方向（Ｙ軸方向）において互いに対向する余剰部３が接合されている。また、フィルム切断方向に交差しかつ端子面１０ｔに沿う方向に延在する余剰部３によって、フィルム１から外部端子２０の上端部を露出させる開口部５が形成されている。【選択図】図１