The positive and negative sides of the lithium battery can be soldered with an ordinary soldering iron. It is only suitable when the tabs are not too large. If the tabs are too large, heat conduction is rapid and welding. the iron will be difficult to reach the melting temperature of the welding wire. However, due to the solderability of the metal, generally speaking, if the nickel-based tab can be soldered well with an ordinary electric soldering iron, if it is an aluminum negative. tab, it can be soldered with a wire suitable for aluminum alloy soldering iron, such as WEWELDING M51 welding wire combined with M51-F flux welding, before welding, use a soldering iron to preheat the mother stallion in advance, then use it. welding wire to immerse the flux into the workpiece and rely entirely on the heat conduction of the parent body to melt the welding wire and form it>
The two poles of lithium batteries are made of aluminum, if the two poles need to be welded with wires, you should pay attention to these aspects.
1. Welding of aluminum tabs and copper wires. If you use an electric soldering iron to solder, you should choose welding materials and corresponding welding fluxes suitable for welding aluminum and copper dissimilar metals. you can use WEWELDING M51 (flux welding wire (called Violin 51) and 51-F plays a role in destroying the oxide scale on the surface of the aluminum wire during the welding process.
2. Aluminum batteries contain polymers and cannot withstand high temperatures, so the melting point of the welding material should be as low as possible and have good weldability to aluminum. 51 is also mentioned above, its melting temperature is 179 degrees, so it is.feasible.
3. Look at the size of the lithium battery. If the lithium battery is a large lithium battery pack and the tabs are made of aluminum blocks, it will be difficult to heat it with a soldering iron. so it's a very difficult thing, and it's difficult to heat it up.
The metal casing of lithium batteries is usually nickel-plated. It is not easy to directly solder solder on this nickel-plated case. If the amount of solder is not large, just a few solder joints, you can first use a file to process the parts of the lithium battery that need to be soldered to make the surface rougher, and then apply a little solder. rosin water and use a stronger product. electric soldering iron to melt the solder wire, plated on the surface of the battery, so that it is easy to solder with solder wire.
The disadvantage of using the methodabove is that the solder joints are not very firmly attached and may unsolder after being subjected to stress. In addition, long welding time is not good for lithium batteries. If you want to solder lithium batteries, the easiest way is to use multifunctional metal flux to solder.
▲ Multifunctional metal flow.
The multifunctional metal flux shown in the picture above can easily weld the pole pieces of stainless steel and battery. When using it, first clean the part where the lithium battery needs to be welded, and then apply multi-functional flux to the soldering part of the lithium battery, so that the solder can be welded to the lithium battery. p>< h3>I have a batch of lithium on hand. The battery has a negative copper-nickel electrode and a positive aluminum-nickel electrode. I now want to connectits positive and negative electrodes to the PCB.
The 18650 lithium battery needs to be connected in series and parallel to form a battery. The series and parallel connection is usually made with nickel-plated copper tape, but the positive and negative electrodes of the lithium battery. and the copper tape are soldered with ordinary solder. This is not easy to carry out, and it is easy to cause early damage to the battery. It is easy to loosen and cause sparks during use, so need to use a spot welder for welding. The input and output terminals of the battery pack and the charge and discharge detection terminals of each battery need to be welded to the protection board, and can be directly welded to the corresponding points with solder.
Original, this is a lithium-ion polymer battery
The negative electrode is made of nickel-plated copper and pcan be welded directly
The positive electrode is made of pure sheet aluminum and cannot be welded.
Typically, when battery cells are shipped, manufacturers convert the aluminum tabs into nickel strips, so they can be soldered.
Now you want to solder the leaf. aluminum tabs on the circuit board. If so, you can use equipment such as an AC welding machine or an ultrasonic welding machine to complete it.
You can also ask your supplier or manufacturer to help you Pinch the battery tabs so you can solder them directly