Lithium ion cells failure mode from overvoltage...

Discussion in 'General Electronics Chat' started by Externet, Jul 7, 2015.

  1. Externet

    Thread Starter AAC Fanatic!

    Nov 29, 2005
    761
    57
    Hi.
    The charge regulation voltage failed and applied about 5 Volts to several 16850 paralleled cells. All kaput. Did it create an irreversible chemical reaction with not a chance of recovery, right ?
     
  2. pwdixon

    Member

    Oct 11, 2012
    488
    56
    Probably lucky you didn't have a fire.
    Not sure it's worth thinking "can I fix these" as they might now be unreliable in some way and future fire risk could be a concern.
    I've never had a fire with a battery but then I've never abused one, I do know there's always been a general suggestion that charging problems can cause problems.
     
  3. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
    2,800
    1,237
    If the Li-ion batteries are incorporated in a 'pack' their apparent failure may owe to an open thermal 'fuse' -- otherwise they're probably "beyond the vale" --- I concur with Post #2 as regards safety/reliability concerns attendant to 'resurrected' cells...

    Best regards
    HP

    PS -- Why on earth do you wish to abolish the decibel???:confused:
     
    Last edited: Jul 8, 2015
  4. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    That depends if the cells have internal protection circuitry or not. But either way they are probably toast.
     
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