How many ways are there to weld lithium batteries?

Power battery as the core components of new energy vehicles, its quality directly determines the performance of the vehicle. Lithium battery manufacturing equipment precision and automation level will directly affect the production efficiency and consistency of the product, and laser processing technology as an alternative to traditional welding technology has been widely used in lithium manufacturing equipment.

Lithium battery welding machine in the welding before doing clean-up preparations that is essential, the location of the upper and lower two electrodes often appear foreign bodies, power check is necessary when we use the spot welding machine, which is an important link in the use of the spot welding machine, sometimes electrical equipment may have the phenomenon of exposure to electricity, of course, the gas circuit system and other possible leakage, so we must do a good job of checking before using lithium batteries, so as to protect Our production is safe.

4 Welding methods.

① Wave welding: actually a combination of ultrasonic welding and laser welding.

②Ultrasonic welding: the advantage of this solution is that it is simple to weld, but it takes up more space and the volume of the module into a group will be less efficient.

③Laser welding: this solution is currently the most widely used, but has a slightly different structure.

④Multi-metal laser welding: this type of welding into groups is also very efficient, fast production speed.

The key technology for the future development of electric vehicles is the safety, cost and energy storage capacity of power lithium batteries. The production process of power battery is complex and has high safety requirements; one of the key process technologies in its production process is laser welding technology; the laser welding process of power battery includes battery soft connection welding, cover welding, sealing nail welding, module and PACK welding. Laser welding of power batteries has many parts, high reliability and safety requirements, which places higher demands on laser welding equipment.

Battery explosion-proof valves are welded using pulsed lasers, which achieve continuous seal welding by overlapping and covering the welded joints, but the welding efficiency is low and the seal is relatively poor. The use of continuous laser welding allows for high speed and high quality welding, and welding stability, welding efficiency and yield can all be guaranteed.

As technology and process methods continue to advance, the characteristics of the laser as a non-contact flexible manufacturing tool will become more apparent. Laser manufacturing is bound to become a convenient and efficient, green, energy-saving and advanced welding technology.