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Battery Fail and Pop?

Discussion in 'Power Electronics' started by K9WG, May 26, 2018.

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  1. K9WG

    K9WG

    25
    6
    Mar 8, 2018
    I was sitting at my work bench yesterday when I heard a very loud pop (my wife even heard it in the other room). It very much sounded like a capacitor or IC had gone critical. However I only had my oscilloscope and laptop running at he time. I could not smell or see any smoke and everything seemed to be OK. This morning I noticed my wireless mouse was not working (it had been working yesterday) and when I went to change the battery (a standard AAA battery) I noticed it had leaked. Have you ever had a battery other than a lithium go critical like that? This is the only explanation I have for the pop I heard.
     
  2. dave9

    dave9

    867
    213
    Mar 5, 2017
    No, the most I've seen a primary or NiMH cell do is once when I had one on a charger that was faulty, it grossly overcharged and made a tiny pop-hiss sound as it vented. I'd never have noticed if it weren't sitting 2 feet away.

    I am wondering if what you observed is just coincidence, that you had a battery leaking but that wasn't what made the noise. A very loud noise, I would assume would be from a force that caused more destruction.

    I'd wonder if it was a solid decoupling capacitor in the laptop or scope or (? whatever other gear you have), maybe it shorted, blew, but was a bit redundant so the device still works.
     
  3. K9WG

    K9WG

    25
    6
    Mar 8, 2018
    It could very well be. I really thought a cap blew in the O-scope but I have not observed any change. Also thought I would have smelled something. Really strange.
     
  4. K9WG

    K9WG

    25
    6
    Mar 8, 2018
    Mystery solved... Well maybe...

    So I noticed my garage door has been a little louder than normal. I figured it just needed some preventive maintenance. Finally called the garage door people and found out I had a broken spring. Since my work area is right above the door it was probably the spring breaking I heard. At least that is the theory for now.
     
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