[TR] Fw: Capacitor Battery Replacement

[ptegler]

:-)  the point wasn't that it couldn't work....  do you drive your car 
every day? At least once every 4 days?

ALL caps self discharge. Personally I just think it's too dangerous. 
with nearly no internal resistance...yes...no heat build up due to 
internal resistance for high amp outputs) but it also means all that 
power can discharge so rapidly it can melt wires.  A short or high 
resistance across a bad contact and you've got big problems.  IF, and I 
say IF it were ...I'll call it consumer safe.... don't you think auto 
manufactires would already be all over it?

To this day I live with an electrical burn from a 1.5 second contact 
with a 6 cell (7.2V) nickel cadium battery across my stainless steel 
watchband. It turmed it cherry red and melted the clasp into the skin 
right at the tendon. It took nearly two years for the square 'melt' 
after the band was surgically removed. ... to flatten out. The scar is 
still easily visible 20 years later. Testing shows those old RC car 
battery packs can output a 1200amp spike for roughly 6 seconds.

Now NI-Cads are in the .2 ohm internal resistance range. (a Lead acid 
around 2-4 ohms) LIthium poly and lithium ion, (laptops cell phones and 
VAPE industry are around .07 (+/-)   My 3.7 (full charge at 4.2V) can 
sustain a 30 amp output for 6 minutes....for something the size of your 
thumb ( a very fat AA cell)  I never did a full power dump, as they have 
a negative temperature coefficient. (thermal runnaway ...hence the 
laptop fires)  Super caps have roughly a 0.07 milliohm (0.00007 ohms) 
output resistance. Basically you can vaporize pennies! (yes... BTDT)

jfft

ptegler


On 9/2/2016 7:07 PM, dave n wrote:
> here’s a video for you naysayers
> https://www.youtube.com/watch?v=z3x_kYq3mHM
>
>
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-- 
Paul Tegler ptegler at verizon.net www.teglerizer.com
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