12 volt Battery

[TexasCotton]

Originally Posted by TexasCotton

Universal Fuel Saver Voltage Stabilizer Regulator Grounding Pivot Mega Raizin | eBay
this is just one ebay listing the range of price is from 25 dollars and upward to 200 dollars

clearly to me these are not ultracaps used for a voltage stabilizer sold on ebay.
I do understand most battery AGM/SLA with the vehicle unstarted/no ICE running are about 12.70 vdc .....Then when engine goes idle after start process the OBD voltage reflects a 13.8 vdc or thereabouts.

[TexasCotton]

Originally Posted by serialk11r

To be fair, this guy:

is using 6 350F caps in series for a capacitance of 58.3F, which is not a whole lot more. A good battery supplement, IMO. I'd shoot for more like 100F though.

Okay
He has updated his current youtube channel on this topic. I am wondering if laser is the same guy who is currently listing the $65 start ultracap kit on ebay???????????

[P-hack]

How do you evaluate the risk/reward here? At night I run the lights and everything with the engine off, and need to be able to start reliably if I am at a stop. As well winter is coming. The extra battery weight helps me glide a little farther/faster too. How does this ever pay for itself and how often does it leave an EOCer (or regular user) stranded in the process?

[oil pan 4]

You could boost a smaller battery with ultra caps to help crank your engine over.

I think it would work best with a LiFePO4 battery when cold. LiFePO4 batteries don't like the cold it really cuts into their cranking amps, this might work as an alternative to taking them in at night or building an over sized battery.

[P-hack]

fyi, my 94 civic came with a 1/2 sized battery. The prius 12v battery is even smaller.

[TexasCotton]

Originally Posted by P-hack

How do you evaluate the risk/reward here? At night I run the lights and everything with the engine off, and need to be able to start reliably if I am at a stop. As well winter is coming. The extra battery weight helps me glide a little farther/faster too. How does this ever pay for itself and how often does it leave an EOCer (or regular user) stranded in the process?

IDK (I DO KNOW) YET
Beside youtube and audio vehicles with ultracaps trying to sort the risk/reward out..........................................

This I do know

Most vehicle 12 volt battery are 12.60 to 12.70 range before the vehicle is started.

When vehicle is started most vehicle voltage reads 13.60 to 13.80

Mazda that have skyactive some have ultra caps which makes the vehicle 12 volt system more efficent.

You can clearly start a vehicle and some use this as alternative

Battery work more effectively under a constant current

capacitors smooth some voltage spikes and ripple effect

[TexasCotton]

Originally Posted by serialk11r

The "voltage" you are concerned with is the dielectric breakdown voltage. If you put capacitors in series, the voltage drop is split between the capacitors. So if you put identical capacitors in series, the new peak allowable voltage is the number of capacitors times the breakdown voltage of a single capacitor.

The capacitance is the harmonic mean of them, which in the case of identical capacitors is just 1/(number of capacitors).

It's analogous to resistors in parallel, except instead of adding current you add voltage, and instead of taking the harmonic mean of resistances you take the harmonic mean of capacitances

you lost me
For explaination
3 volt bank of 4 capacitor in parallel increase the volts/farad??

[TexasCotton]

Actually echo troll has made something much along the lines I was considering. I am not sure how well his Lifepo4 powerizer /maxwell ultracap hybrid set up application is going However he is clearly going in the direction I was considering. I am going the lead acid battery with caps/ultracaps

[echo-francis]

I will describe my setup:
I have a lifepo4 20ah battery. I choose 20ah because with my p&g I draw about 3ah (all accessories off no DRL) that give me about 6 hour range. but if I do not use p&g I can go about 2 hour if I p&g with lights on my range is about 1 hour. add blower or other accessories and bye bye range
the other part of my setup is my ultracapacitor. the primary function of my ultracapacitor is to help my battery to start my car because it can do it alone.
the secondary function is when I have long trip I remove my lifepo4 and put my alt belt back on and drive with the ultracapacitor only. I did my ultracapacitor is 16v because my lifepo4 charger and my alt charge at around 14v and 5 ultracapacitor would have been too tight

if your allways using your alt a ultracapacitor is a good idea because its lightweight and waste less energy to be charged but can be drain in one day not using your car. you can add a small solar panel to fix that.

[redpoint5]

Originally Posted by TexasCotton

Actually echo troll has made something much along the lines I was considering. I am not sure how well his Lifepo4 powerizer /maxwell ultracap hybrid set up application is going However he is clearly going in the direction I was considering. I am going the lead acid battery with caps/ultracaps

Have you made any progress Texas? Do you know how many Ah the LiFePo battery or how many farads the capacitors are on Eco Troll's setup?

Originally Posted by echo-francis

I will describe my setup:
I have a lifepo4 20ah battery. I choose 20ah because with my p&g I draw about 3ah (all accessories off no DRL) that give me about 6 hour range. but if I do not use p&g I can go about 2 hour if I p&g with lights on my range is about 1 hour. add blower or other accessories and bye bye range
the other part of my setup is my ultracapacitor. the primary function of my ultracapacitor is to help my battery to start my car because it can do it alone.
the secondary function is when I have long trip I remove my lifepo4 and put my alt belt back on and drive with the ultracapacitor only. I did my ultracapacitor is 16v because my lifepo4 charger and my alt charge at around 14v and 5 ultracapacitor would have been too tight

if your allways using your alt a ultracapacitor is a good idea because its lightweight and waste less energy to be charged but can be drain in one day not using your car. you can add a small solar panel to fix that.

What farad capacity are your capacitors? Did you find a cheap source for them?