Groups > sci.electronics.components > #6246

Re: Li-Polymer Batteries

From	Jasen Betts <jasen@xnet.co.nz>
Newsgroups	sci.electronics.components, sci.electronics.design
Subject	Re: Li-Polymer Batteries
Date	2017-10-27 22:47 +0000
Organization	"JJ's own news server"
Message-ID	<ot0d27$nl1$1@gonzo.alcatraz> (permalink)
References	(11 earlier) <cf3luch717i2je0rbnjn41mmsiq5hu8qu3@4ax.com> <osectg$iq7$2@dont-email.me> <v6elucdeguh0kidtuja0nfebuou12bdtcf@4ax.com> <oseej7$r6d$1@dont-email.me> <ebnmuctkbbp2ujucgmljrmamf3n1ui7ob6@4ax.com>

Cross-posted to 2 groups.

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On 2017-10-21, krw@notreal.com <krw@notreal.com> wrote:
> On Fri, 20 Oct 2017 23:23:20 -0400, rickman <gnuarm@gmail.com> wrote:
>
>>krw@notreal.com wrote on 10/20/2017 11:03 PM:
>>> On Fri, 20 Oct 2017 22:54:41 -0400, rickman <gnuarm@gmail.com> wrote:
>>>
>>>> krw@notreal.com wrote on 10/20/2017 8:05 PM:
>>>>> On Fri, 20 Oct 2017 04:56:50 -0400, rickman <gnuarm@gmail.com> wrote:
>>>>>
>>>>>> Jan Panteltje wrote on 10/20/2017 3:48 AM:
>>>>>>> On a sunny day (Thu, 19 Oct 2017 18:34:47 -0400) it happened rickman
>>>>>>> <gnuarm@gmail.com> wrote in <osb9a9$v5o$1@dont-email.me>:
>>>>>>>
>>>>>>>> Interesting.  Both videos use a lot more battery than I will use and the bag
>>>>>>>> is barely closed.  I would be essentially rolling the bag up and depending
>>>>>>>> on the size I use I would be folding the sides over before rolling.
>>>>>>>
>>>>>>> You have to leave some opening so the smoke can escape and the pressure can
>>>>>>> be prevented to build up to a point where the bag tares.
>>>>>>
>>>>>> Yes, but some opening is not the gaping holes in these bags.  The other
>>>>>> video with a bunch of batteries in a latched and sealed ammo case is pretty
>>>>>> instructive.  Before it broke the seal it actually dented the can with the
>>>>>> pressure.  But like I said earlier, one cell of Lipo is not nearly as much
>>>>>> energy as the videos show.
>>>>>>
>>>>>> If I could find similar products to the power bank boards that worked with
>>>>>> NiMH, I'd go that route.  I believe they actually prefer NiCad in power
>>>>>> tools because of the high current.  NiMH has too much internal impedance.
>>>>>> But this will only draw a couple hundred mA most likely, so it would be a
>>>>>> good fit.  I would have to roll my own design for the whole thing.
>>>>>
>>>>> Not sure where you going with your comment that "they" prefer NiCad in
>>>>> power tools.  "They" (manufacturers) make almost[*] 100% LiIon tools
>>>>> these days.  LiIon is a hands-down winner in this application, even
>>>>> though they scare you.
>>>>
>>>> The context was compared to NiMH.
>>>
>>> Gotcha.  Is anyone still making NiCD or NiMH tools?  I haven't seen
>>> any in a long time.
>>
>>Don't know.  It's been too long since I dug into hand tools much.  I 
>>remember having an RC boat which ran ok on alkaline cells.  Then I got 
>>rechargeables for it and it TOOK OFF like a rocket.  Seems the lower 
>>resistance of the NiCd made a big difference.  But it only ran for five 
>>minutes, lol.
>
> Most stuff designed for Alkalines ran like crap with NiCds, due to the
> lower voltage. 

Alkalines have lower voltage.  0.9V terminal discharge voltage vs 1.15V

Stuff that quits at 1.2V was not designed, or perhaps was designed to
sell batteries.

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Thread

Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-16 10:16 -0400
  Re: Li-Polymer Batteries Mark Storkamp <mstorkamp@yahoo.com> - 2017-10-16 12:47 -0500
    Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-16 20:49 -0400
  Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-17 01:30 -0400
    Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-17 02:28 -0400
    Re: Li-Polymer Batteries Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-10-17 08:13 +0000
      Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-17 05:21 -0400
        Re: Li-Polymer Batteries Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-10-17 09:47 +0000
          Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-17 06:18 -0400
            Re: Li-Polymer Batteries Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-10-17 10:26 +0000
              Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-17 06:33 -0400
                Re: Li-Polymer Batteries Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-10-17 15:31 +0000
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-17 16:52 -0400
                Re: Li-Polymer Batteries Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-10-18 07:12 +0000
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-18 04:58 -0400
                Re: Li-Polymer Batteries Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-10-18 09:29 +0000
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-17 16:53 -0400
                Re: Li-Polymer Batteries Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-10-18 07:12 +0000
                Re: Li-Polymer Batteries mike <ham789@netzero.net> - 2017-10-17 12:07 -0700
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-17 17:19 -0400
                Re: Li-Polymer Batteries mike <ham789@netzero.net> - 2017-10-17 20:03 -0700
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-17 23:36 -0400
                Re: Li-Polymer Batteries Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-10-18 17:49 +0000
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-18 16:42 -0400
                Re: Li-Polymer Batteries Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-10-19 09:11 +0000
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-19 10:53 -0400
                Re: Li-Polymer Batteries Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-10-19 15:22 +0000
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-19 12:18 -0400
                Re: Li-Polymer Batteries Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-10-19 16:47 +0000
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-19 18:34 -0400
                Re: Li-Polymer Batteries Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-10-20 07:48 +0000
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-20 04:56 -0400
                Re: Li-Polymer Batteries Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-10-20 09:38 +0000
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-20 12:47 -0400
                Re: Li-Polymer Batteries Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-10-20 17:00 +0000
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-20 13:45 -0400
                Re: Li-Polymer Batteries krw@notreal.com - 2017-10-20 20:05 -0400
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-20 22:54 -0400
                Re: Li-Polymer Batteries krw@notreal.com - 2017-10-20 23:03 -0400
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-20 23:23 -0400
                Re: Li-Polymer Batteries krw@notreal.com - 2017-10-21 10:48 -0400
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-21 14:53 -0400
                Re: Li-Polymer Batteries krw@notreal.com - 2017-10-21 19:49 -0400
                Re: Li-Polymer Batteries Jasen Betts <jasen@xnet.co.nz> - 2017-10-27 22:47 +0000
                Re: Li-Polymer Batteries krw@notreal.com - 2017-10-27 22:25 -0400
                Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-19 12:51 -0400
            Re: Li-Polymer Batteries Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-10-17 21:05 +0100
    Re: Li-Polymer Batteries TTman <kraken.sankey@gmail.com> - 2017-10-17 16:02 +0100
      Re: Li-Polymer Batteries rickman <gnuarm@gmail.com> - 2017-10-17 17:37 -0400

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