The battery spot welder uses resistance welding to weld the cell-to-cell busbar to the battery cell pole surface. In order to ensure stable spot welding results, we need to ask ourselves a question: How does a battery spot welder work? The spot welding process of the battery spot welder is generally divided into 4 basic stages: 1) Pre-pressurization stage: The spot welding pins of the battery spot...

In battery pack assembly line for assembling 18650, 21700, 26650, 26700, 32650 and 32700 battery packs, battery spot welding machine is common and is used to spot weld cell-to-cell busbars, which are pure nickel strips or nickel-plated steel strips, to the poles of cylindrical cells. As one of the important components of battery spot welder, spot welding electrode directly affects the spot welding...

In the battery spot welding process, spot welding failure sometimes occurs. If it cannot be solved, it will cause serious quality problems in the finished battery packs. So, what is the main cause of spot welding failure? Figure 1. Automatic Battery Spot Welder for Lithium Ion Batteries There are six major factors that affect the quality of battery spot welding, including welding current, welding ...