Patent ID: 8216715
Filing Date: 2012-07-10
Classification: H01M,Y02E,Y02P

Abstract:
1. A prismatic battery comprising: a flat electrode assembly in which a positive electrode plate formed with a positive electrode substrate exposed portion at an end portion and a negative electrode plate formed with a negative electrode exposed portion at an end portion are wound or stacked in a state where the positive electrode substrate exposed portion and the negative electrode substrate exposed portion are opposed to each other while being insulated from each other by a separator interposed therebetween; the positive electrode substrate exposed portion being bundled and welded with a positive electrode collector member; the negative electrode substrate exposed portion being bundled and welded with a negative electrode collector member; the flat electrode assembly being housed inside a prismatic battery outer can so that the positive electrode collector member is positioned at one end of the prismatic battery outer can and the negative electrode collector member is positioned at the other end; a fixing portion for fixing the position of the flat electrode assembly inside the prismatic battery outer can by contacting an insulating sheet, said fixing portion being provided on at least one of the positive electrode collector member and the negative electrode collector member; the insulating sheet being provided between the fixing portion and the prismatic battery outer can; and a portion of the fixing portion projecting from the flat electrode assembly towards the prismatic battery outer can side only by an amount smaller than the thickness of the insulating sheet in the direction perpendicular to the inner surface of the prismatic battery outer can facing the insulating sheet; all of the insulating sheet being housed inside the prismatic battery outer can.