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 <d...@k0dxv.com>
To: elecraft@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, "k5de...@gmail.com [KX3]" <
>> kx3-nore...@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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