Collector plate welding method and laser welding equipment

By controlling the laser beam to swing with the preset welding path as the reference line and dynamically adjusting the power compensation value H, the problem of welding energy instability caused by changes in the laser beam line speed is solved, the occurrence of welding defects is reduced, and the welding quality of cylindrical batteries is improved.

CN119658123APending Publication Date: 2025-03-21SHENZHEN HANS FORTREND TECH CO LTD
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Patent Information

Application Number
CN202411889846.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

When welding the current collecting plate to the pole ear, the linear speed of the laser beam is constantly changing, resulting in unstable welding energy, which is prone to defects such as welding through and welding, which may lead to short circuit of the cylindrical battery.

Method used

By controlling the laser beam to swing forward with the preset welding path as the reference line, the reference power P1 of the laser beam is set to 1200W-2000W, the power compensation value H is 55%-100%, and the power compensation value H is dynamically adjusted according to the distance between the laser beam and the preset welding path to reduce the linear energy fluctuation of the laser beam.

Benefits of technology

By dynamically adjusting the power compensation value H of the laser beam, the fluctuation of the laser beam line energy during the welding process is reduced, thereby reducing the incidence of welding defects and improving the welding quality of the cylindrical battery.

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Abstract

The invention is suitable for the technical field of laser processing, and provides a welding method and laser welding equipment for a collector plate, the reference power P1 of a laser beam is set to be 1200-2000 W, and the power compensation value H is 55-100%; the welding method of the current collecting disc comprises the following steps that a laser beam is controlled to swing forwards in a reciprocating mode with a preset welding path as a datum line so that the current collecting disc can be welded to a tab; wherein the advancing speed v of the laser beam along the preset welding path is 120 mm / s-250 mm / s; the power P of the laser beam is equal to H * P1, and the power compensation value H is reduced along with the distance between the laser beam and the preset welding path. According to the embodiment of the invention, the fluctuation of the linear energy of the laser beam can be reduced, so that the defect that the collector plate is welded on the tab is reduced.
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