Laser welding method of aluminum alloy water-cooling plate integrated battery case for new energy automobile

The invention discloses a laser welding method of an aluminum alloy water-cooling plate integrated battery case for a new energy automobile, and belongs to the technical field of aluminum alloy laser welding. The laser welding method of the aluminum alloy water-cooling plate integrated battery shell for the new energy automobile comprises the steps that S1, preparation before welding is conducted, specifically, a workpiece to be welded is polished, wiped and fixed; welding parameters are set, specifically, the welding power ranges from 3800 W to 4000 W, the welding speed ranges from 2 m/min to 3 m/min, the spot diameter ranges from 0.4 mm to 0.5 mm, and the defocusing amount ranges from-3 mm to 3 mm; the duration time of the laser pulse is 28-32 ms, the frequency of the laser pulse is 30-34 Hz, and a preheating heat preservation waveform is selected; the wire feeding speed is 3-3.4 m/min; pre-welding teaching is conducted, specifically, pre-welding teaching is conducted on the workpiece to be welded; and the