Patent ID: 8722252

Claim:
A method for manufacturing a sealed battery, the method comprising: (1) winding or stacking a positive electrode sheet and a negative electrode sheet with a separator interposed therebetween to make a flat electrode assembly having a plurality of positive electrode substrate exposed portions at one end and a plurality of negative electrode substrate exposed portions at the other end; (2) dividing at least one of the stacked positive electrode substrate exposed portions and the stacked negative electrode substrate exposed portions into two; (3) placing a collector member or a welding receiving member on each of outermost surfaces of the two-divided substrate exposed portions, and placing a current carrying block including a first protrusion on one face of a metal block and a second protrusion on another face, the faces opposing each other, between the two-divided substrate exposed portions to bring each of the protrusions on the two opposing faces into contact with each of the two-divided substrate exposed portions; (4) bringing a pair of electrodes for resistance welding into contact with the collector members or the welding receiving members placed on both of the outermost surfaces of the two-divided substrate exposed portions; and (5) performing resistance welding with pressure applied between the pair of electrodes for resistance welding.