What is battery spot welding? Battery spot welding is a key process in the cylindrical cell battery pack assembly process, which usually refers to the use of resistance welding technology to weld the cell-to-cell busbar onto the cylindrical cells. It is very common to spot weld nickel-plated steel strips or pure nickel strips onto the poles of cylindrical cells such as 18650, 21700, 26650, 26700, ...

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 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 ...