POWER STORAGE UNIT AND ELECTRONIC DEVICE INCLUDING THE SAME

摘要

A short-circuit between a positive electrode and a negative electrode due to a deposit on an electrode plate is prevented in a power storage unit such as a lithium-ion secondary battery. An electrode plate is covered by a folded insulating sheet. Bonding is performed on facing edges of the sheet which overlap with each other in a portion outer than the electrode plate. One or more openings are formed in the electrode plate, and the facing edges of the folded sheet are bonded to each other also in the opening. Such a bonding portion enables the sheet to be in closer contact with the electrode plate and prevents the displacement between the sheet and the electrode plate. When the electrode plate is deformed or vibrated, the sheet can be rubbed against a surface of the electrode plate, thereby removing a deposit from the surface of the electrode plate.