Introduction to the welding method of lithium ion battery spot welder

Lithium-ion battery spot welding machine does not require strict workpieces. You can choose low-power, common welding methods, so you can choose relatively small lithium-ion battery assembly welding processing equipment, and the impact on the power grid is relatively small. Usually according to the reference material welding condition table of the workpiece material and thickness, first determine the shape and size of the electrode end surface. On the other hand, first select the electrode force and welding time, then adjust the welding current and test different currents. After the test, the diameter of the core meets the requirements, and then the electrode pressure, welding time and range have the right to adjust the current, welding and inspect the sample until the quality of the solder joints fully meets the requirements of the technical conditions. Observe the spot welding process of lithium-ion batteries first to clean the surface of the weld and the general accuracy and assembly, and then the pressure between the top and bottom electrodes. The electric contact heating makes the two workpieces contact the surface and partially melt to form a nugget; the power is turned off, the pressure is maintained, the melted core is cooled and the pressure is solidified to eliminate stress and eliminate the workpiece. The welding method of automatic spot welding machine, spot welding machine welding is usually divided into two categories: direct welding and single-sided spot welding. Direct welding of the workpiece weld on one side of the electrode, typically direct welding. At this point, the workpiece electrode is retracted on both sides. It refers to the conductive plate of the electrode with a larger contact area, which can eliminate or reduce the subsequent work of indentation. It is used for welding thin single plates, lithium ion battery assembly equipment and welding directly welding two or more welding, transformers, Parallel electrodes. At this point, the current path impedance must be the same, and the surface state of each solder joint must be the same material thickness and electrode pressure, welding, to ensure that the current pass is basically the same. Weld the workpiece on the same side of the single-sided electrode. The welding seam formed for the single-sided single-point welding electrode does not use large diameter and large contact area to reduce the current density, no cracks, and the single double-spot welding current flows through the area. Single-sided multi-point spot welding of lithium ion battery spot welding machine has been widely used in mass production. At this time, the transformer can be used for power supply, and each pair of electrodes is compressed in the form of a workpiece. In addition, each pair of electrodes can be powered by a separate transformer, and all electrodes are pressed on the workpiece at the same time. The latter form has many advantages and has been widely used. Its advantages are: each transformer can be placed in the position closest to the connected electrode, which greatly reduces the power and volume of the transformer, the process parameters of each solder joint can be adjusted individually, all solder joints can be welded at the same time, and the production efficiency is high. All electrodes compress the workpiece at the same time, which can reduce deformation; multiple transformers can be energized at the same time to ensure three-phase load balance. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages and disadvantages of lithium-ion batteries for electric vehicles