Bus bar and photovoltaic module

The utility model provides a bus bar and a photovoltaic assembly, the bus bar is a strip-shaped structure, the length direction of the bus bar extends along a first direction, the bus bar comprises a first end face and a second end face which are oppositely arranged along the thickness direction of the bus bar, the first end face is provided with a first groove, and the second end face is provided with a second groove. The first groove and the second groove extend on the same straight line along the second direction; the bus bar is further provided with a through hole, the through hole extends from the first end face to the second end face, and the first groove and the second groove are communicated through the through hole. Wherein the second direction intersects with the first direction, and the first direction and the second direction are both perpendicular to the thickness direction. By adopting the bus bar provided by the utility model, the electric connecting piece can be better welded on the surface of