Today's Message Index:
----------------------
1. 09:36 AM - Li-Ion hazards (Jan de Jong)
2. 10:59 AM - Re: Li-Ion hazards (rayj)
3. 11:08 AM - Re: OT: SMT solder bridge (rayj)
4. 11:08 AM - Re: Li-Ion hazards (Roger & Jean Curtis)
5. 11:17 AM - Soldering knowledge source (rayj)
6. 11:21 AM - Re: Li-Ion hazards (rayj)
7. 11:44 AM - Re: Li-Ion hazards (Tim Olson)
8. 11:46 AM - SD-20 Alternator / SB1B-14 regulator failure modes - update (Ralph E. Capen)
9. 12:50 PM - Re: Li-Ion hazards (Richard Girard)
10. 01:57 PM - Re: Li-Ion hazards (Jan de Jong)
Message 1
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For those who are really interested a comprehensive treatment of the
dangers of Li-Ion:
http://www.nfpa.org/assets/files/PDF/Research/RFLithiumIonBatteriesHazard.pdf
LiFePO4 is a lot less volatile and violent than most of the Li-Ion group.
But it shares unfortunate properties:
- thermal runaway can never be excluded: undetectable internal damage
may exist and trigger at the end of a charging cycle
- the electrolyte is flammable hydrocarbons
I looks like "containment" will be part of any aviation design with
Li-Ion batteries.
Jan de Jong
Message 2
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| Subject: | Re: Li-Ion hazards |
Thanks for posting this. Thereis no substitute forgood science and the
knowledge gained from it.
do not archive
Raymond Julian
Kettle River, MN.
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 02/09/2013 11:34 AM, Jan de Jong wrote:
> <jan_de_jong@casema.nl>
>
> For those who are really interested a comprehensive treatment of the
> dangers of Li-Ion:
> http://www.nfpa.org/assets/files/PDF/Research/RFLithiumIonBatteriesHazard.pdf
>
>
> LiFePO4 is a lot less volatile and violent than most of the Li-Ion group.
> But it shares unfortunate properties:
> - thermal runaway can never be excluded: undetectable internal damage
> may exist and trigger at the end of a charging cycle
> - the electrolyte is flammable hydrocarbons
>
> I looks like "containment" will be part of any aviation design with
> Li-Ion batteries.
>
> Jan de Jong
>
>
Message 3
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| Subject: | Re: OT: SMT solder bridge |
Greetings,
Well...It's confession time. After 2 hours of tentative poking, heating,
fluxing, wiping and inspecting it turned out that the "solder bridge"
was actually a pad that 2 leads on the chip were supposed to share.
That little detail aside, I learned a great deal about SMT soldering and
rework.
Thanks to everyone who offered guidance.
do not archive
Raymond Julian
Kettle River, MN.
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 02/04/2013 03:44 PM, rayj wrote:
> Greetings,
>
> I was inspecting anew electronic device that wasn't working and found
> a solder bridge between 2 of the pins on an SMT chip.
>
> I'm looking for an easy way to remove it. My plan is to use a hot
> needle to touch it and maybe I can sweep or blow it away. I'm open to
> suggestions, keeping in mind I have no equipment for working on SMT
> components.
>
> do not archive
>
> Thanks in advance for any suggestions.
> --
> Raymond Julian
> Kettle River, MN.
>
> "And you know that I could have me a million more friends,
> and all I'd have to lose is my point of view." - John Prine
> *
>
>
> *
Message 4
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I looks like "containment" will be part of any aviation design with
Li-Ion batteries.
Jan de Jong
Perhaps a mechanism to jettison the battery when it reaches
ignition temperature would work. A better solution IMHO is
to not even consider using the Li-Ion battery, at this stage
of development. The cons far exceed the pros.
Roger
_____
.
Do you have a slow PC? <http://www.spamfighter.com/SLOW-PCfighter?cid=sigen>
Try a free scan!
Message 5
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| Subject: | Soldering knowledge source |
As part of my SMT rework adventure, I was sent a site that has a great
deal of infoon soldering.
Thanks to Robert Korff for sending it to me, it belongs in the archive.
_http://www.solder.net/technical-info/soldering-tip-videos_
--
Raymond Julian
Kettle River, MN.
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
Message 6
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| Subject: | Re: Li-Ion hazards |
I wouldn't be surprised if the weight/cost of catastrophe management may
make the Li based battery systems less attractive from an energy density
standpoint.
do not archive
Raymond Julian
Kettle River, MN.
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 02/09/2013 01:08 PM, Roger & Jean Curtis wrote:
>
>
> I looks like "containment" will be part of any aviation design with
> Li-Ion batteries.
>
> Jan de Jong
>
>
> Perhaps a mechanism to jettison the battery when it reaches
> ignition temperature would work. A better solution IMHO is
> to not even consider using the Li-Ion battery, at this stage
> of development. The cons far exceed the pros.
>
> Roger
>
>
> _____
>
> .
>
> Do you have a slow PC? <http://www.spamfighter.com/SLOW-PCfighter?cid=sigen>
> Try a free scan!
>
>
Message 7
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| Subject: | Re: Li-Ion hazards |
Cool, flaming meteorites falling everywhere for people on the ground to see!
Tim
On Feb 9, 2013, at 1:08 PM, "Roger & Jean Curtis" <mrspudandcompany@verizon.net>
wrote:
>
>
> I looks like "containment" will be part of any aviation design with
> Li-Ion batteries.
>
> Jan de Jong
>
>
> Perhaps a mechanism to jettison the battery when it reaches
> ignition temperature would work. A better solution IMHO is
> to not even consider using the Li-Ion battery, at this stage
> of development. The cons far exceed the pros.
>
> Roger
>
>
> _____
>
> .
>
> Do you have a slow PC? <http://www.spamfighter.com/SLOW-PCfighter?cid=sigen>
> Try a free scan!
>
>
>
>
>
Message 8
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| Subject: | SD-20 Alternator / SB1B-14 regulator failure modes |
- update
In my case, it was the drive gear that goes in to the accessory case.
There's a rubber thingy inside that was in a bunch of pieces. The safety catch
did it's job so the parts didn't float in to the engine. It all came out together
- but it was very obvious that the gear wasn't driving.
Anyone know if that is replaceable? Looks like it could be - just maybe not by
me.....I'll ask the folks @ B & C.
Ralph Capen
Message 9
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| Subject: | Re: Li-Ion hazards |
Jan, Perhaps it should be treated as Scotty treated the warp core of the
Enterprise and eject them when there's trouble. :-}
Rick Girard
do not archive
On Sat, Feb 9, 2013 at 11:34 AM, Jan de Jong <jan_de_jong@casema.nl> wrote:
> jan_de_jong@casema.nl>
>
> For those who are really interested a comprehensive treatment of the
> dangers of Li-Ion:
> http://www.nfpa.org/assets/**files/PDF/Research/**
> RFLithiumIonBatteriesHazard.**pdf<http://www.nfpa.org/assets/files/PDF/Research/RFLithiumIonBatteriesHazard.pdf>
>
> LiFePO4 is a lot less volatile and violent than most of the Li-Ion group.
> But it shares unfortunate properties:
> - thermal runaway can never be excluded: undetectable internal damage may
> exist and trigger at the end of a charging cycle
> - the electrolyte is flammable hydrocarbons
>
> I looks like "containment" will be part of any aviation design with Li-Ion
> batteries.
>
> Jan de Jong
>
>
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
Message 10
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| Subject: | Re: Li-Ion hazards |
Maybe airplanes can be equipped with a black hole for garbage disposal
(black hole traveling along in a parallel universe).
Jan de Jong
do not archive
On 2/9/2013 9:48 PM, Richard Girard wrote:
> Jan, Perhaps it should be treated as Scotty treated the warp core of
> the Enterprise and eject them when there's trouble. :-}
>
> Rick Girard
> do not archive
>
> On Sat, Feb 9, 2013 at 11:34 AM, Jan de Jong <jan_de_jong@casema.nl
> <mailto:jan_de_jong@casema.nl>> wrote:
>
> <jan_de_jong@casema.nl <mailto:jan_de_jong@casema.nl>>
>
> For those who are really interested a comprehensive treatment of
> the dangers of Li-Ion:
> http://www.nfpa.org/assets/files/PDF/Research/RFLithiumIonBatteriesHazard.pdf
>
> LiFePO4 is a lot less volatile and violent than most of the Li-Ion
> group.
> But it shares unfortunate properties:
> - thermal runaway can never be excluded: undetectable internal
> damage may exist and trigger at the end of a charging cycle
> - the electrolyte is flammable hydrocarbons
>
> I looks like "containment" will be part of any aviation design
> with Li-Ion batteries.
>
> Jan de Jong
>
>
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>
> --
> Zulu Delta
> Mk IIIC
> Thanks, Homer GBYM
>
> It isn't necessary to have relatives in Kansas City in order to be
> unhappy.
> - Groucho Marx
>
> *
>
>
> *
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