| abstract |
PROBLEM TO BE SOLVED: To provide a battery in which the possibility of foreign metal inclusions in an electrode body is reduced. A battery includes a rectangular battery case including a case body and a lid member, an electrode body housed in the battery case, and an insulating film disposed between the battery case and the electrode body. The insulating film is in the form of a single sheet, and is arranged at least between the electrode body and the bottom surface of the battery case and the pair of long side surfaces, and the pair of end portions of the insulating film in the height direction, It is located closer to the lid member than the electrode body. Here, in the insulating film, between the position corresponding to the end on the side of the lid member of the electrode body and the pair of end portions, at least a part along the width direction orthogonal to the height direction, A cut is provided in the thickness direction of the insulating film, and a region closer to the end than the cut forms an inclined surface that is inclined toward the electrode body side. [Selection diagram] Figure 2 |