[TheForge] was solar cells OT: POL: chickens

[James Binnion]

They are quite dangerous for several reasons. The type I was using would explode if shorted for very long as they try to deliver all the charge at once. The lab I was working in was damn near burned down when a tech mis-wired a stack of 28 of theses cells and several of them burst their canisters with reports like an M80 and proceeded to burn. They set the wall next to his bench on fire and filled a large lab wing with smoke in a very short time span. But they produce lots of energy in a very small package. One of the engineers on the project who had an explosives background said that by volume they had more energy than an equivalent amount of TNT.

Jim

On Mar 17, 2011, at 10:28 AM, Bruce Freeman wrote:

> Though I doubt anyone would try anyway, let me caution you never to
> open a lithium thionyl chloride battery.  Nasty chemicals inside.  For
> messing with by knowledgeable people in a chemistry fume hood only.
> Not like sweet, innocent zinc-acid batteries.
> 
> On Thu, Mar 17, 2011 at 12:32 PM, James Binnion <jbin at well.com> wrote:
>> 
>> On Mar 17, 2011, at 7:41 AM, <Grover.Richardson at gtri.gatech.edu> <Grover.Richardson at gtri.gatech.edu> wrote:
>> 
>>>  Oh yes, all of the batteries that I have tested so far (other than the lead acid) have sucked on being able to produce a high current pulse.  By sucking I mean they have a high internal resistance, which causes the battery to internally absorb as much power as it is putting into the load during peak current conditions.
>> 
>> You ought to try lithium thionyl chloride batteries, very high energy density and very low internal resistance and light weight. Only one tiny problem they are primary cells, not rechargeable. But man they put out a lot of energy. It is these properties that make lithium chemistry batteries so attractive but at least with the current examples once you set up lithium chemistry batteries to be rechargeable you loose the low internal resistance.
>> 
>> James Binnion
>> jbin at well.com
>> 
>> 
>> 
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> 
> 
> 
> -- 
> Bruce
> NJ
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James Binnion
jbin at well.com