Patent ID: 8574003

Claim:
A busbar, comprising: a battery connecting portion connecting electrodes of two batteries to each other; and a circuit body connecting portion continued to the battery connecting portion and connected directly to a circuit body by overlapping a conductive core wire of the circuit body on the circuit body connecting portion, wherein the circuit body connecting portion comprises: a welding portion, at which the conductive core wire of the circuit body is welded; and a bridge portion connecting the welding portion and the battery connecting portion, wherein a cross-section area of the bridge portion along an intersecting direction intersecting a direction of connecting the welding portion and the battery connecting portion is configured to be smaller than a cross-section area of the welding portion along the intersecting direction, wherein the welding portion comprises a projection, which projects from a surface of the welding portion, and the conductive core wire of the circuit body is overlapped on and welded on the projection.