[chbot] Resurrecting used 18650

[Charles Manning]

" What would be the best charging strategy/algorithm for trying to revive
these cells?"

https://www.ccc.govt.nz/services/rubbish-and-recycling/disposal/hazardous-waste

Playing with damaged Li-ions? Make sure your insurance is up to date!


On Fri, Jun 30, 2017 at 9:56 AM, Volker Kuhlmann <list0570 at paradise.net.nz>
wrote:

> A friend of mine gave me a stack of old laptop battery packs, with
> several 18650 each. Some packs had cells showing heat damage - I'll
> bring those to show at next meeting. There are about 30 cells from packs
> with no visual damage, and I'm thinking to try and find out what
> capacity they might have left in them. Several of you have done this
> before.
>
> Currently cell voltages are between 20mV and 2.6V. What would be the
> best charging strategy/algorithm for trying to revive these cells?
> Is there any increased risk of cells overheating/catching fire, or
> leaking? I have this expensive MC3000 charger where I can program pretty
> much any parameter, but I'm less keen on having it smoking...
>
> Thanks for any tips etc.,
>
> Volker
>
> --
> Volker Kuhlmann
> http://volker.top.geek.nz/      Please do not CC list postings to me.
>
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