BATTERY AND METHOD OF PRODUCING THE SAME

摘要

A battery (100) includes an electrode body (80) having a positive electrode and a negative electrode and also includes an exterior case (50) for receiving the electrode body. An insulation film (10) for isolating the exterior case and the electrode body from each other is placed between an inner wall surface (56) of the exterior case and the electrode body (80). The insulation film (10) has a bag-like shape in which the electrode body (80) is inserted. The bag-like insulation film (10) has a gap filling section (20) on its surface facing a side surface (81) of the electrode body (80), and the gap filling section (20) closes a gap between the electrode body and the inner wall surface (56) of the exterior case.