ELECTRICITY STORAGE DEVICE

摘要

In the present invention, at least one defect arising from a plurality of secondary batteries being integrated is resolved. An electricity storage device, which is provided with a plurality of flat secondary batteries (70), has: a casing (1) provided with an aperture (30); and a lid (31) that can open and close the aperture (30) of the casing (1). The plurality of secondary batteries (70) are disposed in parallel oriented vertically in the casing (1), and can be independently removed from and inserted into the casing (1) via the aperture (30).