[tmemphiselec]

I think it better to leave it to a professional who has the necessary experience and training to get the job done right.

 

[piotrsko]

Thanks everyone, guess car batteries just aren't feasible, shame I really wanted a refurbish-able battery. nicolaskn, mind me asking how much range you get and where you put them? That sounds like a better option.

The old rule of thumb was car weight divided by ten, times KWH of battery gave you miles range kinda of

I think it better to leave it to a professional who has the necessary experience and training to get the job done right.

Great answer, but useless.
What do you do when there aren't professionals because you're the first to try something nobody has done before?

 

[Classycrusader]

That's a great equation to have (even if its ballpark). I think I did it wrong though because I did 3300lbs/10x 5.2 (2 battery cells from ev west) and got 1716. Battery technology must've gotten a lot better, or more probable, I did the math wrong 😬

 

[floydr]

Try car weight divided by ten, divide the Wh of battery by 330
5200/330=15.75 miles
You did the math right. 3300/10*5.2=1716 the formula went wrong somewhere along the line.
battery technology has gotten better but 5.2 kWh is still 5.2 kWh

Later floyd

 

[remy_martian]

That's a great equation to have (even if its ballpark). I think I did it wrong though because I did 3300lbs/10x 5.2 (2 battery cells from ev west) and got 1716. Battery technology must've gotten a lot better, or more probable, I did the math wrong 😬

5200*2*10/3300 = 31.5 miles on two Tesla MODULES (not cells), assuming you can find a 48V motor of sufficient power to run a 3300 pound car, and assuming the modules can deliver the sustained current at that power which they cannot.

So, you have a 3300 pound, 31 mile range, slow-ass, golf cart using two Tesla modules. Wrong battery for the job.

 

[Classycrusader]

Try car weight divided by ten, divide the Wh of battery by 330
5200/330=15.75 miles
You did the math right. 3300/10*5.2=1716 the formula went wrong somewhere along the line.
battery technology has gotten better but 5.2 kWh is still 5.2 kWh

Later floyd

Thanks Floydr that sounds a lot closer. I'll be saving that on my list of equations for the rest of my life. I'm just using 2 batteries to see how many I can expect for 2 so I can know what to expect when I add more later. I know you get more running in a circuit or parallel but its been a long time since electric class (as you can tell), you always wish you pay more attention later in life. Anyways, figured id just run lowest estimate atm.

Remy_martin they're LG chem batteries from ev west (LG CHEM Lithium Ion Battery - 60.8V, 2.6kWh, EV West - Electric Vehicle Parts, Components, EVSE Charging Stations, Electric Car Conversion Kits)
They seem pretty good for size and weight but im going to check out the Nissan Leaf batteries and see how feasible they are. Someone here mentioned they're also using a g35, be interested to hear his numbers for reference.

 

[floydr]

LG CHEM Lithium Ion Battery - 60.8V, 2.6kWh
This item is currently not available.
later floyd

 

[remy_martian]

If you're using 2 of those LG Chem MODULES, that's 120V and 40Ah, which you might push to 120A for 20 minutes or so.

That works out to ~15kW or 20HP. For 20 minutes...

There's no free lunch in this stuff. Maybe you should do a motorcycle?

 

[brian_]

Maybe I missed something along the way, but why would anyone expect useful performance (in terms of either power or range) in an Infiniti G35 from one-third of the battery of a Chrysler Pacifica Hybrid, which only has a 30-mile electric range? Yes, the G35 is a bit lighter and has less aero drag... but one-third of the power and energy?