Laser continuous repair welding method

Abstract

The invention provides a laser continuous repair welding method which comprises the following steps of S1, picking defective batteries passing through a welding post; S2, carrying out secondary lasercleaning on the defective batteries; S3, re-placing the batteries subjected to secondary laser cleaning under the welding post, and carrying out laser welding, wherein a welding parameter and a welding trace are the same as a primary welding parameter; S4, carrying out secondary bright-dipping repair welding on the batteries through laser; and S5, if a repair welding effect is poor, repeating thesteps S1 to S4. The laser continuous repair welding method provided by the invention only uses existing equipment and process parameters and does not need to be readjusted so as to be simple and convenient. According to the repair welding method provided by the invention, a laser cleaning area includes a sealing nail welding bead area and exceptant areas, so that the roughness of the welding beadcan be improved, and the laser absorptivity during repair welding is improved; after laser repair welding, the welding bead is smooth and level in surface and good in sealability; and the welding efficiency is high, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of laser welding, in particular to a method for laser continuous repair welding. Background technique [0002] With the rapid development of the new energy industry, in order to improve production capacity and production efficiency, fiber lasers will gradually replace pulsed lasers and be applied to the welding of power battery sealing nails. However, if the electrolyte cannot be completely removed, micropores will appear Explosion point, broken welding and other phenomena. [0003] At present, in the industry, after defects such as bursting points appear after welding of sealing nails, pulse lasers are generally used to add aluminum wires for spot welding repair welding. The repair welding efficiency is low, the appearance is not beautiful, and the airtightness and strength cannot be effectively guaranteed. Contents of the invention [0004] The purpose of the present invention is to provide a laser cont...

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Problems solved by technology

[0002] With the rapid development of the new energy industry, in order to improve production capacity and production efficiency, fiber lasers will gradually replace pulsed lasers and be applied to the welding of power battery sealing nails. However, if the electrolyte cannot be completely removed, micropores will appear Phenomena such as bursting point and broken welding

[0003] At present, in the industry, after defects such as bursting points appear after welding of sealing nails, pulse lasers are generally used to add aluminum wires for spot welding repair welding. The repair welding efficiency is low, the appearance is not beautiful, and the airtightness and strength cannot be effectively guaranteed.

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