Simple method of soldering 18650 lithium battery with electric soldering iron
The outer shell of 18650 lithium battery is made of stainless steel, which is very convenient to weld with a spot welding machine when multiple batteries are used in combination. In amateur situations, without a spot welding machine, if only a regular soldering iron is used for welding, even if the solder melts, it cannot be firmly welded to the battery. Here is a simple method for welding 18650 lithium batteries using stainless steel flux and soldering iron.
Stainless steel soldering flux.
Stainless steel flux is a colorless and transparent liquid that can be used to weld stainless steel products, galvanized sheets, copper aluminum materials, and lithium battery electrodes (nickel plating). Using this flux, it is easy to solder 18650 lithium batteries with a slightly higher power (≥ 35W) soldering iron.
Stainless steel flux and 18650 lithium battery.
When welding 18650 lithium batteries, first use a clean cotton ball to wipe the area where the lithium battery needs to be welded clean, drop a drop of stainless steel flux on the welding area, and use a soldering iron to melt the solder wire, so that the solder can firmly adhere to the battery. Then, plate the wires used to connect the battery with tin, and weld the tin plated wires to the tin points on the lithium battery.
Welding of 18650 lithium batteries.
18650 lithium battery coated with solder and soldered wires. When tin plating the parts of lithium batteries that need to be welded, it is best to use an electric soldering iron with a power of ≥ 35, otherwise the metal shell of the lithium battery will dissipate heat quickly, causing the solder to not melt well and affecting the welding quality.
Welded lithium battery pack.
The questioner wants to use 18650 lithium batteries to form a 12V battery, which can be welded in series with three lithium batteries. After welding, it is best to install a heat shrink tubing specifically designed for 18650 lithium batteries, which is both aesthetically pleasing and convenient to use.
