Patent ID: 7887946
Filing Date: 2011-02-15
Classification: H01M,Y02E,Y02P,Y02T

Abstract:
1. A prismatic battery, comprising: an electrode group in a flat form stacked or rolled by a positive electrode coated with a positive electrode mixture to a positive electrode substrate and a negative electrode coated with a negative electrode mixture to a negative substrate with respect to each other with a separator therebetween; a pressing plate; and a current collecting body electrically connected to said pressing plate; an end in a width direction of at least one of said positive electrode substrate and said negative electrode substrate having a plurality of exposed sections which are uncoated with said positive electrode mixture and said negative electrode mixture, and said pressing plate welded to said plurality of exposed sections; said pressing plate forming opposing surfaces with a gap therebetween by folding back a metal plate, and provided with a slit along a folded back section at least to one side of said opposing surfaces; said plurality of exposed sections being inserted into said gap of said pressing plate, and said plurality of exposed sections and said pressing plate are being welded by a high energy beam from a transverse direction through said slit; wherein said current collecting body includes a metal fitting having an inverted L-shaped cross section and a connecting section directly extended in a strip form from said metal fitting; said current collecting body having an inside surface of said inverted L-shaped metal fitting positioned so as to abut to one of said opposing surfaces of said pressing plate, and said folded back section; and said current collecting body having a section abutting one of said opposing surfaces of said pressing plate of said inverted L-shaped metal fitting welded by a high energy beam from a transverse direction; wherein said current collecting body having a section abutting one of said opposing surfaces of said pressing plate of said inverted L-shaped metal fitting is provided with a slit at a position overlapping with another slit provided at said pressing plate; and said plurality of exposed sections, said pressing plate and said inverted L-shaped metal fitting of said current collecting body are welded by a high energy beam from a transverse direction through said respective slits provided to said pressing plate and said inverted L-shaped metal fitting of said current collecting body.