Battery Welding

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Battery Tab Welding Application Overview Battery tab welding, often referred to as battery tab spot welding, is the process of attaching thin metal tabs to battery cell terminals so the cells can be connected into packs, modules, or finished battery assemblies. In most production environments, the goal is to create a strong electrical and mechanical connection without overheating or damaging the cell. For this application, the most common use case is welding nickel battery tabs to cylindrical cells. This is a strong fit for Sunstone’s CD Dual Pulse welding systems, especially the CD200, CD400, CD600, and CD1200. These systems function as highly controlled battery tab welding machines, delivering precise energy output for repeatable weld quality. They are typically paired with either: A Parallel Weld Head for greater consistency in production environments The DPHP hand piece for lower-cost, more flexible operation In general: Nickel, nickel-coated steel, and many clad tab materials are well suited for CD battery tab welding. Around 0.005" nickel remains one of the most common and easiest materials to weld successfully using battery tab spot welding techniques. As tab thickness increases beyond about 0.010", tab design becomes more important. Features like dimples and slits are often required to improve weldability and ensure proper energy concentration. For copper tab welding from 0.010" to 0.020" thick, the recommended solution is the Sunstone PA250i OMEGA, which is specifically designed to handle the higher conductivity and heat dissipation challenges associated with copper. Common Use Cases Nickel tab welding to cylindrical lithium-ion cells This is the most common battery tab welding application. Manufacturers use battery tab spot welding to attach pure nickel tabs to the positive or negative ends of cylindrical cells, enabling the construction of battery packs for portable electronics, tools, medical devices, mobility products, and industrial systems. Typical de