Wow! ultracapacitors are the bomb!
#41
06-08-2012, 02:04 AM
"IUoUo is constant current"
it is not just constant current, it also tapers down the current and transitions over to constant voltage when the battery is near fully charged or something along those lines. for capacitors we only need the constant current part.
"a dozen times is nothing in a automotive life, wait after a couple of 100times"
a car battery needs to live in the same environment, what make it more suitable at handling this situation better?
"The difficulty is to achieve the ability to discharge quick and rapidly without damage"
these capacitors are rated at 147 amps continuous. i have two in parallel so that makes it 294 continuous amps charge or discharge. they can also sustain for short periods 2165 amps each. that is a combined amps of 4330.
they are also rated at over 1,000,000 discharge cycles down to 50% of the rated voltage. try finding a battery capable of that.
" I'm not concerned about the particles- it's the acid'
ultracapacitors do not contain acid. the electrolyte is actually quite safe compared to lead acid batteries. they have pressure release vents so i dont think there would be much of a risk of exploding. the hydrogen from lead acid batteries on the other hand can...
"MAN DI trucks sometimes need up to 15 minutes of pre-glowing..."
i havent used glow plugs in my truck for over two years now. but as i stated earlier this is not for everyone.
if this doesn't change any change anything for me at least others reading this thread can lean from it.
it is not just constant current, it also tapers down the current and transitions over to constant voltage when the battery is near fully charged or something along those lines. for capacitors we only need the constant current part.
"a dozen times is nothing in a automotive life, wait after a couple of 100times"
a car battery needs to live in the same environment, what make it more suitable at handling this situation better?
"The difficulty is to achieve the ability to discharge quick and rapidly without damage"
these capacitors are rated at 147 amps continuous. i have two in parallel so that makes it 294 continuous amps charge or discharge. they can also sustain for short periods 2165 amps each. that is a combined amps of 4330.
they are also rated at over 1,000,000 discharge cycles down to 50% of the rated voltage. try finding a battery capable of that.
" I'm not concerned about the particles- it's the acid'
ultracapacitors do not contain acid. the electrolyte is actually quite safe compared to lead acid batteries. they have pressure release vents so i dont think there would be much of a risk of exploding. the hydrogen from lead acid batteries on the other hand can...
"MAN DI trucks sometimes need up to 15 minutes of pre-glowing..."
i havent used glow plugs in my truck for over two years now. but as i stated earlier this is not for everyone.
if this doesn't change any change anything for me at least others reading this thread can lean from it.
#42
06-08-2012, 05:33 AM
I use Odysessy batteries and Optimas. They also deliver the same CCA's. But for extended periods.
I do like the thought of using capacitors. Don't get me wrong on that.
I also do see a use as a starting aid. Sure Power for example has an electronic device supporting delivery trucks with a lot of starts.
Even a weak battery can charge a capacitor. Then in turn deliver enough engery for an engine start due to quick discharge abilities. Proven and works!
But to replace the complete system? I'm missing the backup Ah's. What about power supply of equipment like engine heaters. Not everyone as you alrady mentioned, is blessed living in a snow free area.
AGM batteries don't have acid floating around. It's a gel. Hydrogen is recombined into the gel- these batteries are the only onces allowed to be build inside of a vehicle.
This is not about pro and contra. The alternator is simply not designed for your application.
It is getting interesting when these capacitors are available within the needed voltage range-plus the safety margin to cover u peak to read as Upon = 20V. 40V would be even better. But this might be a problem of size and construction.
Until these op voltages aren't safely reached I stay out.
Just imagin what happens if only one member builds the same and the device causes damage?
I do like the thought of using capacitors. Don't get me wrong on that.
I also do see a use as a starting aid. Sure Power for example has an electronic device supporting delivery trucks with a lot of starts.
Even a weak battery can charge a capacitor. Then in turn deliver enough engery for an engine start due to quick discharge abilities. Proven and works!
But to replace the complete system? I'm missing the backup Ah's. What about power supply of equipment like engine heaters. Not everyone as you alrady mentioned, is blessed living in a snow free area.
AGM batteries don't have acid floating around. It's a gel. Hydrogen is recombined into the gel- these batteries are the only onces allowed to be build inside of a vehicle.
This is not about pro and contra. The alternator is simply not designed for your application.
It is getting interesting when these capacitors are available within the needed voltage range-plus the safety margin to cover u peak to read as Upon = 20V. 40V would be even better. But this might be a problem of size and construction.
Until these op voltages aren't safely reached I stay out.
Just imagin what happens if only one member builds the same and the device causes damage?
#43
06-08-2012, 04:46 PM
i have considered converting back to standard batteries do to the limited amount of tries you get with the capacitors. right now i trying out one set of capacitors and one deep cycle battery at 550 cca. it will crank it over but not as fast, it does give me many more attempts though. if it doesn't start, wait a few seconds and try again.
i would like to try out some of those Thundersky 100ah batteries in place of the caps but the charging of them is even more complicated.
where did you find an Odysessy or Optima that could do over 2000 cca each? that would fit in the regular battery bay. i would like one of those.
i would like to try out some of those Thundersky 100ah batteries in place of the caps but the charging of them is even more complicated.
where did you find an Odysessy or Optima that could do over 2000 cca each? that would fit in the regular battery bay. i would like one of those.
#44
06-09-2012, 11:34 AM
Sorry, that was my mistake.
Got confused with current in a short.
The Optima Red Top, I use as a starting battery has only 800 CCA. It is the RT U4.2.
The supply battery I use for the engine heater and audio is a Odyssey PC1700 PJT with a CCA of 900. CCA's are useless here, I need the outstanding supply abilities for the engine heater.
The only battery I know above 1000CCA is the Odyssey with 120Ah, PC2250 with a CCA of 1225 and the Exide Dual AGM EP2100 with 240Ah and 1200 CCA- but that a real big monster.
I'm also looking for capacitors as a supplemental aid. Knowing that they are used in fleet applications. Sadly the price tag is still way too high.
Got confused with current in a short.
The Optima Red Top, I use as a starting battery has only 800 CCA. It is the RT U4.2.
The supply battery I use for the engine heater and audio is a Odyssey PC1700 PJT with a CCA of 900. CCA's are useless here, I need the outstanding supply abilities for the engine heater.
The only battery I know above 1000CCA is the Odyssey with 120Ah, PC2250 with a CCA of 1225 and the Exide Dual AGM EP2100 with 240Ah and 1200 CCA- but that a real big monster.
I'm also looking for capacitors as a supplemental aid. Knowing that they are used in fleet applications. Sadly the price tag is still way too high.
Last edited by Deezel Stink3r; 06-11-2012 at 05:15 AM.
#46
06-14-2012, 04:49 PM
If you want some cranking power, check these out... XS Power
