This therefore provides a highly controlled method of developing localised welding temperatures that are suitable for joining materials up to 0.5 mm thick onto conductive battery cans. The TIG battery welding process has been tested and proven with a number of battery pack designs using nickel, aluminium and copper flat.
In fact it is very simple. As long as you have a Battery Clamp or a Lithium Battery Fixed Bracket, this can actually solder many parallel packages very well. The first thing to do is to cut a small piece of nickel and then bend it a bit. It is very flexible and easy to operate.Therefore, this is only a small part of the actual operation.
Spot welding! Spot welding is easy. The first step is to set the amount of energy or the pulse time, depending on the welder. After that, it's a matter of placing the nickel strip on top of the cell group you wish to weld. The welding electrodes need to be pressed down with a light amount of pressure.
Spot-welding strips and tabs onto batteries in order to make battery interconnections and larger battery pack assemblies is a common production technique. Typically, battery interconnections are made from nickel strips, often designed with splits and projections that are then resistance-welded using parallel gap or step welding methods.
To make a traditional battery pack, 18650 cells need to be connected together with a pure nickel strip. Nickel strips come in various lengths, widths, and thicknesses.
However, laser welding technology can be used for pouch cells if the foils are in close contact and a pulsed laser is used to avoid overheating. In the case of pouch cell case sealing, typically a compact heat sealer is used to seal aluminium-polymer laminate films.