The connection piece of battery pack and nickel strip of lithium battery are generally welded by single-sided double spot welding machine (double needle welding).
The material of connecting piece includes pure nickel piece, steel strip nickel plating, etc. In welding, if the electrode material is not selected correctly, the phenomenon of "sticking electrode" or "splashing" is very easy to occur in the battery spot welding machine.
At present, the electrode (double needle welding) of battery spot welding machine is generally made of alumina copper. Alumina copper is also called dispersion copper,
The composite uses 12-25 nanometer tiny A1203 particles to strengthen the copper matrix, so that the material has the properties of high strength, high hardness, high conductivity and high softening temperature.
Aluminum oxide copper, the electrode of battery spot welder, is mainly aluminum oxide copper imported from the United States and Japan, as well as aluminum oxide copper produced by domestic manufacturers. Customers generally report that alumina copper imported from the United States has better performance and can effectively solve the problems of electrode sticking and splashing. But it's not easy to buy real American imported materials.
Of course, some customers use copper base inlaid alloy to make battery welding electrode, which improves the service life in practice.
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