[Elecraft] [KX3] Lithium Battery Video

Wed Feb 8 19:42:04 EST 2017

I've been a bit Leary of LiPo batteries since I used to fly Electric RC helicopters.
They can be quite volatile 

      From: Doug Person <doug at k0dxv.com>
 To: elecraft at mailman.qth.net 
 Sent: Wednesday, February 8, 2017 6:41 PM
 Subject: Re: [Elecraft] [KX3] Lithium Battery Video

I had a poor quality Lithium-ion pack explode with the force of dynamite 
while recharging. Shrapnel was embedded in the sheet rock 8 feet away.  
The shock wave was so intense, it ruptured my left eardrum.  I never 
considered that they could be dangerous.  Now I know by finding out the 
hard way.  The PBS show was excellent.

Doug -- K0DXV

On 2/7/2017 6:08 PM, Fred Jensen wrote:
> Yes, saw it too, really good reporting.  There was a very good [in the 
> "real engineering facts" department] article some time ago, prior to 
> the Samsung debacle.  It was aimed primarily at electric vehicle 
> batteries, and touched a bit on large lithium-chemistry batteries for 
> the home.  Tesla's "Gigafactory" making PowerWalls and vehicle 
> batteries is about 45 km from us.
>
> It might have been in Scientific American, sadly I don't remember.  
> But I do remember:
>
> The energy density of lithium-chemistry batteries is extraordinarily 
> high, and they have an almost infinitesimal internal resistance.  
> Consequently, anything that shorts even part of the battery is going 
> to result in extreme currents and resulting electrical and pyrotechnic 
> displays.
>
> The "secret" to safe lithium-chemistry batteries appears to be really 
> good engineering and manufacturing quality control.  I've had one 
> LiPoly RC battery I used with my KX1 go up in flames while I was 
> calling CQ in the Spartan Sprint.  Fortunately, I was outside on the 
> deck, it was externally connected via a pigtail, and I was able to 
> fling it over the deck railing onto the gravel driveway.  It's 
> provenance was difficult to determine, but I suspect somewhere way way 
> to the west of NV.
>
> If a lithium-chemistry battery ignites, water is not likely to put the 
> fire out.  Cheap isn't always a good deal, and I'd never use one 
> internal to the radio.
>
> 73,
>
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
>
> On 2/7/2017 3:19 PM, Ken G Kopp wrote:
>> Yes, the PBS / NOVA program was indeed informative ... and free of
>> political BS 😁
>>
>> 73
>>
>> K0PP
>>
>> On Feb 6, 2017 8:26 PM, "k5dez02 at gmail.com [KX3]" <
>> KX3-noreply at yahoogroups.com> wrote:
>>
>>>
>>> For anyone who would like to know why Lithium batteries can be so
>>> dangerous I ran across this interesting video from PBS Nova. If you 
>>> have
>>> not seen it yet take a look. It should be worth you time.
>>>
>>> Tim - K5DEZ
>>>
>>>
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