LASER WELDING APPARATUS COMPRISING LASER BEAM BLOCKING BLOCK

Provided is a laser welding apparatus configured to weld an electrode lead of at least one secondary battery of a battery module and a main bus bar configured to electrically connect a plurality of secondary batteries to each other. The laser welding apparatus includes: a laser beam emitting unit including a laser emitting element to irradiate a laser beam to the electrode lead and the main bus bar; a pressing jig including a pressing bar configured to move in a left-and-right direction such that the electrode lead is adhered to the main bus bar; and a blocking block movable to block the laser beam generated in the laser beam emitting unit from reaching the at least one secondary battery or movable to allow the generated laser beam to pass therethrough, according to a position of the pressing bar moved in the left-and-right direction.