Laser welding system and method

Abstract

According to the laser welding system and method, in the laser welding system, a feeding and discharging assembly can transfer a photovoltaic assembly with a junction box to a workbench; the clamping assembly is arranged on the workbench so as to clamp and position the photovoltaic assembly. The welding pressure head assembly comprises a connecting plate, a mounting base, an elastic piece, a pressure head and a position detector, the connecting plate is connected with the first mechanical arm and the mounting base, the upper end of the elastic piece is connected with the mounting base, the lower end of the elastic piece is connected with the pressure head, the position detector is arranged on the mounting base, and the pressure head is provided with an induction piece located below the position detector; the laser generator is connected with the laser focusing assembly so that laser can be transmitted to the laser focusing assembly. The laser focusing assembly is connected with the second mechanical arm; the visual positioning assembly is located above the workbench, the visual positioning assembly and the position detector are electrically connected with the industrial personal computer, and the industrial personal computer is electrically connected with the laser generator, the first mechanical arm and the second mechanical arm. The welding reject ratio can be reduced, and the welding precision and quality of the junction box are improved.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a laser welding system and method. Background technique [0002] Photovoltaic cell modules, as a technology that utilizes solar energy to generate electricity, have the advantages of being green and environmentally friendly, and have been popularized in many fields; because of their high photoelectric conversion efficiency, they have become mainstream products in the photovoltaic solar power generation market. Among them, photovoltaic cell components mainly include cells, interconnection bars, bus bars, tempered glass, EVA (ethylene-vinyl acetate copolymer), backplane, aluminum alloy, silica gel and junction boxes and other components. [0003] The junction box of the photovoltaic module and the bus bar on the photovoltaic cell realize the connection of the electricity generated by the solar cell with the external line through welding process. Welding the junction box is t...

AI Technical Summary

Problems solved by technology

[0004] In the current laser welding process, the welding indenter assembly is usually used to compress the welding material, but the moving position of the commonly used welding indenter assembly is set in advance during the welding process, and cannot be self-adjusted according to the actual situation. , when the placement position of the junction box on the photovoltaic module is slightly deviated, the welding head assembly cannot well press the welding position on the junction box, resulting in poor pressing effect; moreover, the welding of each junction box The point thickness is different, and the existing soldering head assembly cannot compress the soldering point of the junction box

Therefore, the laser welding system applied to the junction box has the problems of low welding accuracy and quality, and high welding defective rate

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