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Thread: Overcharged LiPo battery

  1. #1
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    Overcharged LiPo battery

    So my lovely little lbcb is running off the Turnigy Nanotech 1200mah 15C batteries from hobbyking, all nicely soldered to JST connectors with spanky turnigy wire and insulated up.

    Onboard charging at desk and easy swap out when lazy, 5 spare batteries ($3 a piece ), all is wonderful.

    Spare batts are charged via my DIY travel charger, which consists of a TP4056 board, volt meter, jst connector, usb cable all neatly packed into a dual 18650 battery case.

    Recently for some reason the TP4056 board decided to play up and wanted to charge everything to 5V instead of the usual 4.2V. This is plugged into a 1A wall plug. Curiously plugging it into a 0.5A ego wall plug makes it want to charge to 5.5V.

    I caught it after it had pushed one of the batts to 4.6 - 4.7V, ran a couple tests, chucked it and rebuilt it. Always have spare charge boards people.

    The battery has since been marked and left plugged into a voltmeter for two days and run down to 4.4V.

    In the interests of science and foolishness, I've put it back into the lbcb and started using it this morning.

    Wonder what will happen.

  2. #2
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    if it swells up through the course of its discharge (since the over charge), throw it away, dont attempt another charge.

    if no swelling, use it but keep and eye out for swelling.
    Fatman likes this.

  3. #3
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    Banged away on it all morning, now down to 3.9V, all systems normal.

    I suspect these nanotechs take a fair whack of abuse compared to others and li-ons. A 1200 mah with an 18A continuous discharge rating that's not much bigger than a AA is pretty good.

  4. #4
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    Theyre great spec.
    I have a bunch of the turnigy lipos too, though dont take their tough impression for granted, theyre still the most volatile battery when turned unstable, hence my advice on ensuring you always ensure theyre not swelling.
    Fatman likes this.

  5. #5
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    concurs with all qwerts has said ... I would still be a little suss on the overcharged one but nanos can take a bit of overcharging ...however IF they have had a crystalline path established then they can go bad quickly ... it could be your battery is a couple of millimetres off completing that path and it might still be growing .... for the $$'s I would be draining it fully and tossing it ( for peace of mind )
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  6. #6
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    Tell you what, I'll only use it when I'm present.


    Besides, my mind has many pieces, could probably afford to use a few.







    Aren't you glad I decided against letting it get pushed to 5.5V to see what happens. Because science! *****! Yo!

  7. #7
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    At $3 ---> bin
    Fatman and Nakor like this.
    Ignore the Super-moderator tag in my profile, I have resigned from that position but admin have not updated my profile as yet

  8. #8
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    Quote Originally Posted by gtadmin View Post
    At $3 ---> bin
    Oh all right. Only discharged to 3.7V now, removed and ready for disposal procedures.

    For anyone curious I was actually taking reasonable care, despite the banter, in satisfying my curiosity.
    gtadmin likes this.

  9. #9
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    I was rather hoping to see your avatar cat post a pic of you lying near your charger with a blood dribble down the side of your head from an exploding crystal impact.

    Also hoping that nothing bad happened, but wanting the video of the mini explosion, and I blame SS600 for this urge entirely.
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  10. #10
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    This would be the same urge I had to put it outside and charge to 5.5V?

    Alas it was raining and have the add, so it would have taken to long.

 

 
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