Hi B,I have a PCB with a soldered CR2032 battery and I store this PCB for a long time. My question is whether the CR2032 will release an acidic or corrosive compound on the PCB, corroding it
He doesn’t have a problem at this time, he is trying to avoid one. He is wondering if lithium cells like the CR2032 will leak and damage PCBs if stored long term, and the photos seem to be of that happening. From what I can see, the cell is not the cause of these problem cases but a victim of whatever the root cause is (I believe it is water damage).Hi B,
I think if you soak the PCB with liquid flux and blow it with hot air, and repeat till it cleans up, you should be able to assess things better.
Cheers, Camerart
Hi Y,He doesn’t have a problem at this time, he is trying to avoid one. He is wondering if lithium cells like the CR2032 will leak and damage PCBs if stored long term, and the photos seem to be of that happening. From what I can see, the cell is not the cause of these problem cases but a victim of whatever the root cause is (I believe it is water damage).
Conformal coatings are a great idea if boards have to be exposed to moisture. Even if that’s too much for a given application, they should be stored with a good dessicant in sealed plastic bags.Hi Y,
Ok, fine.
I have sprays that help to seal water from connectors and components.
C
Really? I've found whitish deposits around the seals of several CR2032 cells kept for a few years in their original packaging in dry conditions.unlike alkaline batteries which can suffer leakage, lithium cells don't.
Lithium manganese coin cells have gas release vents for cases of extreme over pressure. It is possible for the contents to migrate out from the cell in tiny amounts, which is what that powder is. Why it happens varies—high temperature, mechanical shock, and in some cases I think from excessive self discharge.Really? I've found whitish deposits around the seals of several CR2032 cells kept for a few years in their original packaging in dry conditions.
The PCBs seemed to have water damage. The one bare cell did leak, but who knows why? To decide if the temperature is too high, the best thing is to find the manufacturer's datasheet which will specify storage temperature range.From your experience, all these images are leaks from the CR2032 or something external that is not related to this CR2032 battery.
I don't know what the internal construction of the CR2032 is and if its chemistry undergoes reactions that turns into some corrosive compound for the PCB board and the metal fitting of this battery
the temperature where I live ranges from 33-35C is this enough for the CR2032 to leak?
my PCB not appears brand cr2032
https://ae01.alicdn.com/kf/Hfdf33a9...jogos-sd2snes-rev-x-vers-o-pro-diy-16-bit.jpg
Be safe. Remove it. Whether or not the battery leaks, is a function of the quality of the manufacture of the battery. CR2032 are so common, I wouldn't trust it for long term unused storage. Safer to simply remove it. I agree with other posters that you *might* not have a problem, but.... it's your choice.I have a PCB with a soldered CR2032 battery and I store this PCB for a long time. My question is whether the CR2032 will release an acidic or corrosive compound on the PCB, corroding it
You don't have to worry about it if you remove the battery.yes i am storing it long term for years but if it doesn't leak i would keep it on the pcb and not open the devices but i don't know if it leaks or not
by Jake Hertz
by Jake Hertz
by Jake Hertz
by Jake Hertz