ACCUMULATOR DEVICE

摘要

An accumulator device comprises: an electrode assembly; a case which houses the electrode assembly; and an insulating sheet which insulates the electrode assembly and the case from each other. The electrode assembly has a layered structure in which positive electrodes and negative electrodes are stacked. The electrode assembly has a first end face which is orthogonal to the stacking direction, a pair of primary faces which are located on both sides in the stacking direction, and a tab which extends on the first end face in the direction which is orthogonal to the stacking direction. The insulating sheet has a folded box shape, and further has a pair of primary face covering parts which respectively cover the primary faces of the electrode assembly, and non-primary face covering parts which cover the first end face of the electrode assembly and faces other than the primary faces thereof and which are contiguous with the pair of primary face covering parts. The non-primary face covering parts overlap at least partially with each other.