Dongzan Lithium Energy TechnologyIt is one of the earliest companies in China that specializes in the research and development, production and sales of high-quality button batteries.Developed and designed a button battery laser spot welding machine, maintaining the domestic production and manufacturing technology of laser welding feet for rechargeable batteries.

Solder foot battery is a type of button battery. By welding on the button battery to increase the position of the solderable feet, it occupies a large proportion in the use of button batteries.

Because button batteries are small and thin, unskilled butt welding will cause great damage to the button battery, especially the negative stage of the button battery. As shown in the figure, the internal structure of the button battery is shown. Under the negative case is metal lithium. Lithium has good electrical conductivity and heat conductivity, and metallic lithium is in direct contact with the diaphragm inside the battery (which blocks the positive and negative electrode materials). Therefore, poor butt welding methods can easily cause damage to the battery diaphragm. This results in an internal short circuit failure in the button battery.

In addition, due to the activity of metallic lithium, serious improper spot welding may even lead to accidents such as explosions and fires. Therefore, it is recommended that multi-professional manufacturers and multi-professional workers use special equipment and not perform electric welding on button batteries.

At present, most button battery factories in China use resistance welding. The principle of resistance welding is to use the thermal effect of resistance to fuse the welding part and the battery shell to form a weld. The welding process is convenient, low-cost, and the welding is firm. However, the disadvantages are obvious, such as The welding is unsightly, easy to oxidize, blacken, and the front cover of the solder joint is large. The equipment and personnel operation have great influence on the button battery welding parts, which can easily cause the button battery welding parts to fall off, the size is inaccurate, and the battery voltage drop of the soldered feet is poor, etc.

The laser butt welding process used by Dongzan Lithium Energy Technology is the welding process used in the soldered rechargeable batteries produced by internationally popular button battery manufacturers such as PANASONIC, MAXELL, SONY, and VARTA. The welding process is beautiful and elegant. It has many advantages such as solidity, high integrity, little damage to the battery, accurate specifications, etc. It is China's leading welding foot battery processing technology and represents the advancement of China's button battery butt welding technology to international standards.