Patent ID: 7666547

Claim:
A sealed prismatic battery having a closed-bottom prismatic tubular battery can that has an opening at its upper surface, a lid that closes the upper surface of the opening of the battery can, an electrode body accommodated in the battery can, an output terminal penetratively fastened to the lid, an insulator that is placed on a lower surface side of the lid and insulates the output terminal at least from the lower surface of the lid, a plate-shaped lead plate that is placed on a lower surface side of the insulator and connected to a lower end of the output terminal, and a thin-plate-shaped current collector lead led upwardly of the electrode body, the current collector lead having an upper end portion welded to a lower surface of the lead plate in a surface contact state and the current collector lead being bent at least in a position located rather closer to a front wall of the battery can, wherein the insulator comprises: a lid side insulating portion held between the lid and the lead plate; an electrode side insulating portion that is placed on an upper side of the electrode body; and a thin plate portion that has a flexibility and connects the lid side insulating portion with the electrode side insulating portion, and the insulator is located closer to a front wall of the battery can than the current collector lead, and the electrode side insulating portion has a projection that upwardly projects on its upper surface.