Hi Folks,
I remember in 2013 I was designing a UPS for my employer and had a A123 26650 cell on my desk & walked away for a couple minutes to pee and when I came back there was a crowd around as it apparently rolled into a spiral notebook and set it on fire! Fairly embarrassed, but the other engineers were impressed by the amount of current/destruction a single cell could do! Have a renewable energy day, Mark Mark E. Hanson 184 Vista Lane Fincastle, VA 24090 540-473-1248 phone & FAX, 540-816-0812 cell REEVA: community service RE & EV project club Website: www.REEVAdiy.org (See Project Gallery) UL Certified PV Installer My RE&EV Circuits: www.EVDL.org/lib/mh REEVA Demo: <http://youtu.be/4kqWn2H-rA0> http://youtu.be/4kqWn2H-rA0 <https://www.weatherlink.com/embeddablePage/show/a88920376f864ecabaed843dd89 75b8d/signature> Fincastle Solar Weather Station Date: Mon, 27 Nov 2023 21:15:13 -0800 From: Cor van de Water <cor.vandewa...@gmail.com <mailto:cor.vandewa...@gmail.com> > To: Electric Vehicle Discussion List <ev@lists.evdl.org <mailto:ev@lists.evdl.org> > Subject: Re: [EVDL] I destroyed an A123 26650 by shorting to the case. Message-ID: <CALdL5i3dyE3nJBu==mxa7mthkcohc_q04fhwco-jy6m7ltv...@mail.gmail.com <mailto:CALdL5i3dyE3nJBu==mxa7mthkcohc_q04fhwco-jy6m7ltv...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" Lawrence, when I removed some of the cells from that pack that you picked up, I cut the straps with heavy duty scissors. One time I accidentally shorted the cell I was removing while cutting and the current was large enough to bite a chunk out of the scissor blades... These are *very* low resistance cells, so the short circuit current consequently is very high, even at the low 3.5V of a single cell. Cor. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20231128/5f857a93/attachment.htm> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
