If the lithium battery tabs are made of aluminum and need to be connected to copper wires, use M51 low temperature welding wire of 179 degrees and M51-F flux for welding. Usually this type of soft pack. The battery is easy to solder. Use an electric soldering iron to solder. If it is an aluminum tab with a large tab, it is not easy to weld it. Only when the tab is heated. it must be welded. Also use M51 welding wire with M51-F flux welding.
It is a raw material for lithium-ion polymer battery products.
The tabs are metal conductors that bring the positive and negative poles out of the battery core. Simply put, the tabs on the positive and negative poles of the battery are the contact points during charging. and unloading. This contact point is not the copper part slocated outside the battery, but a connection inside the battery. The pole tabs are divided into three materials: the positive electrode of the battery is aluminum, and the negative electrode is nickel or copper-plated nickel. They are both composed of a film and metal strips.