Groups > sci.electronics.components > #6226

Re: Li-Polymer Batteries

From	krw@notreal.com
Newsgroups	sci.electronics.components, sci.electronics.design
Subject	Re: Li-Polymer Batteries
Message-ID	<ebnmuctkbbp2ujucgmljrmamf3n1ui7ob6@4ax.com> (permalink)
References	(10 earlier) <oscdoi$iu3$1@dont-email.me> <cf3luch717i2je0rbnjn41mmsiq5hu8qu3@4ax.com> <osectg$iq7$2@dont-email.me> <v6elucdeguh0kidtuja0nfebuou12bdtcf@4ax.com> <oseej7$r6d$1@dont-email.me>
Organization	Forte - www.forteinc.com
Date	2017-10-21 10:48 -0400

Cross-posted to 2 groups.

Show all headers | View raw

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.  Some stuff didn't run at all (UVLO).  NiCds also have
a horrible self discharge and short life, particularly multi-cell
packs if not kept charged.  A real bad combination for tools.  LiIon
fixes all that.

Back to sci.electronics.components | Previous | Next — Previous in thread | Next in thread | Find similar

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

csiph-web