The laser welding parts of power battery of laser welding machine mainly include: cover explosion-proof valve welding, pole welding, battery shell welding, sealing nail (electrolyte injection port) welding, battery cell ear welding, top cover welding, busbar welding, etc. The welding parts of power battery are many, difficult and high precision. Power battery manufacturers also have high requirements for automation, safety, precision and processing efficiency of battery production equipment. The advantages of laser welding machine are small loss of welding materials and no need for solder, beautiful weld, stable and easy operation of equipment performance, high welding quality and automation, high process repeatability, etc., which are widely used in the processing procedures of power lithium battery components.

The explosion-proof valve is a thin-walled valve body on the battery cover. When the internal gas pressure of the battery reaches the bursting pressure of the explosion-proof valve, the explosion-proof sheet on the top cover ruptures, so that the internal gas of the battery is discharged from the explosion-proof valve port to prevent the battery from exploding due to flatulence. Therefore, the welding process of the explosion-proof valve of the laser welding machine is extremely strict, requiring the weld to be sealed, strictly controlling the heat input, and ensuring the destructive pressure value of the weld.

REBOUND CNC laser explosion-proof valve welding uses fiber lasers and is equipped with a variety of station designs, including left and right double stations and rotating double stations/four-station designs. Welding and loading and unloading are performed alternately, and the welding efficiency is high. The laser welding machine is also equipped with a high-precision explosion-proof valve fool-proof detection system, which can effectively prevent the explosion-proof valve from being placed upside down. It supports the MES system, and the welding data can be flexibly set. The equipment has high welding stability, high spatter suppression, beautiful welds, and high welding quality.