POWER STORAGE DEVICE

To provide a power storage device capable of contributing to a cost reduction while satisfying a request for reliability of the device.SOLUTION: A power storage device includes: a laminate structure 10 in which a plurality of battery cells 10a to 10d, each of which includes an exterior body 15 constituted by laminate films 16, 17 opposite to each other, the exterior body housing battery elements 11, 12, and has first apertures 19, at which a positive electrode terminal 13 and a negative electrode terminal 14 are exposed on the laminate films 16, 17, respectively, are laminated so that a positive electrode terminal 13 and a negative electrode terminal 14 are brought into contact with each other; a housing 20 for housing the laminate structure 10; a second aperture 21 provided on the housing 20 so as to face a positive electrode terminal 13 or a negative electrode terminal 14 of the laminate structure 10; an insulation member 41 provided at the circumference of the second aperture 21; and an elastic member 42 that is electrically connected to the positive electrode terminal 13 or the negative electrode terminal 14 and is supported by the insulation members 41.SELECTED DRAWING: Figure 4 【課題】デバイスの信頼性の要求を満たしつつ、コストダウンに寄与することができる蓄電デバイスを提供すること。【解決手段】互いに対向するラミネートフィルム１６、１７から構成される外装体１５が電池要素１１、１２を収容し、正極端子１３及び負極端子１４がラミネートフィルム１６、１７のそれぞれにおいて露出する第１開口部１９が形成される複数のバッテリセル１０ａ〜１０ｄが、正極端子１３及び負極端子１４が互いに接触するように積層されてなる積層構造体１０と、積層構造体１０を収容する筐体２０と、筐体２０において、積層構造体１０の正極端子１３及び負極端子１４に対向するように設けられる第２開口部２１と、第２開口部２１の周縁に設けられる絶縁部材４１と、正極端子１３及び負極端子１４と電気的に接続し、絶縁部材４１に支持される弾性部材４２と、を含む。【選択図】図４