The core technology of the future development of new energy electric vehicles is the safety, cost and energy storage capacity of power lithium battery. The production process of power battery is complex, and the requirement of safety is high; Laser welding technology is one of the core production technologies in the production process; The laser welding process of power battery includes battery soft connection welding, top cover welding, sealing nail welding, module and pack welding. There are many laser welding parts for power battery, and the requirements for reliability and safety are high, which puts forward higher requirements for laser welding machines and equipment.
The battery explosion-proof valve is welded by pulse laser, which can achieve continuous sealing welding by overlapping and covering the solder joints, but the welding efficiency is low, and the sealing performance is relatively poor. Continuous laser welding can achieve high-speed and high-quality welding, welding stability, welding efficiency and yield can be guaranteed.
With the continuous development and progress of technology and technology, the characteristics of laser as a non-contact flexible manufacturing tool will be more obvious. Laser manufacturing is bound to become an advanced manufacturing technology which is convenient, efficient, green, energy-saving and consumption reducing. It can promote the technical level development and product technical transformation in China's industrial field, and meet the development needs of the national economy, especially the manufacturing industry.

In order to reduce the cost of laser welding in lithium battery production, more lithium battery manufacturers will choose laser welding initially. Laser welding will be more and more widely used in lithium battery industry, and form a new development trend.