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 ...

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...

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...

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, ...

In the battery pack assembly process, in order to ensure that the finished battery pack can achieve the best designed performance, the incoming battery cell sorting and matching is necessary, and then battery pack assembly is carried out after battery cell grouping. In fact, before delivery, the battery cell manufacturers have already tested and graded the battery cells according to capacity throu...