New energy power battery cooling box laser powder filling swing welding method

Abstract

The invention relates to a new energy power battery cooling box laser powder filling swing welding method, and belongs to the technical field of material engineering. The problem about connection of anew energy automobile power battery cooling box is solved. The new energy power battery cooling box laser powder filling swing welding method is characterized in that at the connecting part of a battery cooling box, a laser device provided with a galvanometer scanning system generates swing laser beams to conduct powder filling welding. By controlling the galvanometer scanning system, the swing amplitude and the swing frequency of the laser beams are controlled, energy of the laser beams is weakened when the laser beams swing to a thin wall on one side of a welding seam, and welding penetration is prevented. When the laser beams swing to the other side of the welding seam, the energy of the laser beams is strengthened, and the welding seam is formed. In the welding process, synchronous powder feeding is carried out, the laser beams directly act on the metal powder, absorption of lasers is promoted, and the energy absorbing efficiency is increased; and the metal powder has the effectsof buffering the laser beams and protecting a connector, and the problem about welding penetration, caused by disturbance during welding, of abdomen structural member thin walls is avoided. The new energy power battery cooling box laser powder filling swing welding method provides a new thought for welding complex structural members.

Description

technical field [0001] The invention relates to a laser swing welding method, in particular to a laser powder filling swing welding method for a cooling box of a new energy power battery, and belongs to the technical field of material engineering. Background technique [0002] With the intensification of environmental pollution, advocating environmentally friendly travel has become a social norm, and the development of new energy vehicles has become a trend. The power of new energy vehicles is usually provided by lithium-ion power batteries, but the endurance of such batteries is limited, and the phenomenon of heating is relatively obvious during use, which requires the cooling system to cool down. The general cooling system mostly adopts a liquid cooling system, and the liquid cooling system generally consists of multiple structural parts, and the cooling box is an important part of the liquid cooling system. [0003] The power battery cooling box used in new energy vehicl...

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Problems solved by technology

However, because the wall plate of the cooling box is extremely thin, a slight defect in laser welding will cause weld penetration defects, which will greatly reduce the stability of the welding process and affect the performance of the entire component, which poses severe challenges to the welding operation. the test

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