If you are using an electric welder to convert aluminum tabs into nickel strips, you can use Violin 303B solder to flatten them and then prevent the workpiece from spot welding to generate heat. However, that temperature is 400 degrees, and you. Need to do a test. Generally, you can use an electric soldering iron to solder directly with M51 low temperature soft solder and use M51-F flux for soldering. The temperature may be higher when using a spot welding machine.
Can solder be used to connect the positive and negative electrodes of ternary lithium batteries?
Most lithium battery combinations are produced and processed using of nickel foil and spot welding technology. the most mature and a production method with the lowest production costs.
Thereasons analyzed by PACKWANG are as follows:
1. Nickel sheets are inexpensive and the shapes can be irregularly diversified.
2. Spot welding technology is mature, and the spot welding machines on the market are also very cheap.
3. Spot welding of combined lithium batteries can basically ignore production tools and save a lot of costs.
4. Maintenance and disassembly after welding are also more convenient. Some disassembled batteries only need to polish the cell welding surface for reuse.
I hope the above answer from packwang can help you.
The positive and negative electrodes of the Pacific Automotive Network ternary lithium battery can be connected by welding. 18650 lithium battery can be welded with WEWELDING M51 tin alloy welding wire suitable for cdifferent copper and aluminum. welding, but assistance from the M51-F is required. For flux welding, polish it before welding, then use a soldering iron to preheat the auxiliary aluminum sheet in advance, then use soldering wire dipped in flux to lower the soldering wire until at the solder joint. , and at the same time, use the preheating soldering iron to help the solder wire immersed in the flux to melt and form.
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 soldering wire, placquered on the surface of the battery, so that it is easy to solder with solder wire. The disadvantage of using the above soldering method 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, first clean the area where the lithium battery needs to be soldered, and then apply multi-functional flux to the area where the lithium battery needs to be soldered, so that the solder can be soldered to the lithium battery .
After using the flux, some solder was releasedtee welded on the positive and negative electrodes of the lithium battery.
The wires are soldered to the 18650 lithium battery. The cathode of the lithium battery tab is copper foil and can be soldered directly. The whole machine is generally aluminum foil and cannot be soldered with an ordinary soldering iron. Generally, it needs to be converted into nickel sheet (spot welding with a spot welding machine) before it can be welded with ordinary solder.
(Images/Text/Photos: Pacific Automotive Network Calling the Beast Q&A)