Users of modern devices with autonomous power sources know that sometimes in order to repair a rechargeable battery consisting of Li-ion batteries (for example, 18650 size), it is necessary to replace several cells with new ones. In this case, it is imperative to have the skill of soldering these elements. But the soldering process has some specifics.
It is necessary
- - a standard soldering iron (40 W is quite enough);
- - soldering flux (LTI-120 or flux for aluminum);
- - solder;
- - narrow-nose pliers;
- - connecting wires.
Instructions
Step 1
Prepare the rear surface of the battery for use. Remove any dirt or old solder residue.
Step 2
Apply flux to the battery surface with a brush. The flux must be applied evenly and carefully. It is advisable that the flux does not spill over the walls of the battery. The acidic environment destroys the protective coating and the battery does not look very pleasant.
Step 3
Pull the solder onto the soldering iron. Bring it gently to the back surface covered with flux. The flux will begin to evaporate intensively, and a reserve is formed at the point of contact for the subsequent connection of the wire. The soldered piece of tin is very firmly hooked to the battery wall and perfectly withstands mechanical stress.
Step 4
It is necessary to achieve the formation of a strong droplet that will be firmly attached to the surface of the battery. Never overheat the battery! If the temperature rises, be sure to cool the battery.
Step 5
Now you can perfectly solder a prepared wire to this drop. The connection will be strong and very reliable. The resistance of this connection will be minimal. This option is optimal between the use of additional equipment, which greatly increases the contact resistance, and the expensive option of fastening with a special tape.
