Battery Soldering: Replacing 3V CR2450 Battery, Desoldering & Soldering Techniques, 180-200°C

Question

Hello. I have a problem because I have to replace the used 3V CR2450 battery, which is soldered to the plates. Can I boldly desolder it and solder a new one? I am a beginner and have no idea about such things. Tin melting temperature is about 180-200 degrees, is there a risk of soldering?

Adam-zw · Answer

Hello
You can unsolder as long as it is solder mostly these derivations are polite punctually . Brazing may not be easy as both parts are nickel plated. You need to clean the soldering places with abrasive paper and whiten it with tin only then you can solder both parts. Try to do the soldering as soon as possible so as not to overheat the battery
greetings

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vasteq · Answer

there are two points. So you think it might not be tin? Will something happen if the battery overheats?

Szczepaniii · Answer

If you want to unsolder an old and so broken / damaged battery, you have nothing to worry about, in my opinion, because the battery goes to the trash anyway. When it comes to soldering a new one, you can make it easier by using a suitable soldering paste, e.g. "Flux", it is a paste (not acid) that makes it easier to cover any elements with tin at a relatively lower temperature, just be careful because this paste is conductive and makes short circuits, so a little bit "wet" the tip of the soldering iron in it and go to work.
greetings

vasteq · Answer

Unfortunately, what Adam said was probably true. The battery is hot - it cannot be desoldered in any way. I could possibly cut the lamellae right next to the weld, but then I would have to solder batteries of the same diameter into it so that it would not fall out - and I wanted to give smaller 20mm instead of 24.5mm because they are much cheaper.
PS. what will happen when I start to solder a new battery, if after applying it to the plates, the device turns on immediately and it is not possible to disconnect it temporarily.

vasteq · Answer

This is one more question regarding the solder paste: is it like the one called GREEN 50 gr / 0308 solder paste from the auction: will it be suitable for soldering a battery?

tedi48 · Answer

think about a different battery mounting, maybe conductive glue because you probably won't be able to solder, I have batteries from emergency lamps and they are also welded

Tomcio555 · Answer

I propose to buy a special stand for the above-mentioned batteries and place it in the stand ...

Anyway, in some time you will have a problem with replacing the battery again, after a few soldering of the "inexperienced" hobbyist the path on the PCB will go away from overheating. And the stand is really cheap and you put it on once and that's it :)

Greetings..

vasteq · Answer

can you specify what stands it is about? Preferably some photos. The original sockets / plates are rather permanently soldered to the board of this device and it is impossible to unsolder them.

Tomcio555 · Answer

Do you have batteries? and the stand is the same as found on computer motherboards, only the larger one is suitable for the type of battery .. Greetings...

rafcio363 · Answer

solder calmly, tin with rosin is enough, I have done this many times, it is useful to practice soldering. and if it is possible, put on a basket for batteries because it costs pennies.

vasteq · Answer

the battery that sits there is a CR2450, 24.5mm in diameter, but I would like to give a smaller 2032 20mm in diameter. And my badge, which already holds the batteries, although permanently, looks identical to the one in the photo below. And in order to remove the batteries from it, I would have to cut off both plates at the welding points. What is the basket for?

Battery Soldering: Replacing 3V CR2450 Battery, Desoldering & Soldering Techniques, 180-200°C

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