A nozzle for a laser processing system is provided. A primary passage extends between the proximal end and the distal end of the nozzle body along a central longitudinal axis. At least one auxiliary passage is located within the body of the nozzle adjacent to the primary passage while substantially fluidly isolated from the primary passage. At least one conduit is located proximate the distal end of the body and in fluid communication with the at least one auxiliary passage. The at least one auxiliary passage is configured to flow a secondary fluid through the body of the nozzle in a first direction to impinge on a surface of the at least one conduit that is proximate the primary passage. The at least one conduit is configured to redirect the secondary fluid toward an exterior surface of the body in a second direction.

A splash-guard device for a laser welder for contact elements for electrical contacting. The deice has a pressure piece for pressing onto the component to be welded, and a spatter guard. The pressure piece has a pressure piece body with a laser beam outlet mouth, the edge of which surrounds the welding point when pressed on. The spatter guard is designed as an angled tube, the first end of which is sealed off from the pressure piece and the second end of which is designed as a connection for an extraction system. At least one laser beam entry opening is formed on an angled or curved region which is opposite the first end having the pressure piece. Also, a laser welder with such a splash-guard device.

An air curtain apparatus may include a blowing block including a main blowing passage and an auxiliary blowing passage. The blowing block may receive compressed air. The main blowing passage may be configured to blow a first portion of the compressed air between an object (e.g., a lens) and another object (e.g., a wafer). The auxiliary blowing passage may be above the main blowing passage and configured to blow a second portion of the compressed air onto the object. Thus, contaminants may be inhibited from contaminating the object.

A welding mask according to an embodiment of the present disclosure includes a welding mask body having a laser passage portion configured to allow a laser emitted into a housing of a battery cell to pass therethrough, the welding mask body configured to cover an open portion on a side of the housing; and an insertion guide having a hollow structure, connected to the laser passage portion, and configured to be inserted into a winding center hole of an electrode assembly received in the housing.