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 quality. In addition, battery spot welding electrode is consumables.

Therefore, when choosing the battery spot welding machine electrode, we need to choose the right material, shape, length and needle diameter, etc. Among them, spot welding electrode material is undoubtedly the most important.

Figure 1. Spot Welding Electrode for Battery Spot Welder

So, what is the best electrode for spot welding? We need to focus on the following four points.

1) High current conductivity: The battery spot welder electrodes are required to not easily heat up even when a large current passes through it.

2) High heat conduction: The spot welding machine electrode is required to cool down quickly even if they are heated.

3) Good mechanical strength: Even under high temperature and pressure during spot welding, the battery spot welder electrodes can maintain hardness and is not easy to deform.

4) Not easy to stick: During spot welding, the spot welding electrode is required not to stick to the cell-to-cell busbar to form an alloy.

Alumina copper has good performance in the above four points, so it is widely used as battery spot welder electrodes. But, it should be noted that the quality and price of alumina copper electrodes vary greatly. It is difficult to compare the quality by comparing the parameter differences on the material technical specifications, the best comparison is to use them in a battery spot welding machine. During spot welding, it can maintain hardness, is not easy to deform, and is not easy to stick, which says it all.

WinAck Group can provide complete battery spot welder electrodes solutions, support customization according to drawings. Come by, contact us for a solution that can help you succeed. For better batteries, Win & Ack!