Patent ID: 7857867
Filing Date: 2010-12-28
Classification: H01M,Y02E,Y02P,Y02T,Y10T

Abstract:
1. A sealed battery comprising: a power generation element including a plurality of positive electrode plates each having a positive electrode active material layer and a plurality of negative electrode plates each having a negative electrode active material layer, the positive and negative electrode plates being alternately laminated so that a separator is interposed therebetween, each of the negative electrode plates including a negative electrode lead portion having no negative electrode active material layer and extending in a predetermined direction; and a battery case which houses the power generation element, wherein the battery case includes a negative-electrode case member that constitutes a part of the battery case, is made of an electrically conductive material to serve as a negative collector plate to which the negative electrode lead portions are connected, and a main case member that houses the power generation element and is sealed by the negative-electrode case member, the negative-electrode case member includes a flat plate part to which the negative electrode lead portions are connected, and side walls extending from peripheral edges of the plate part and perpendicular to the plate part, the side walls being in abutting contact with an open end of the main case member to seal it.