DIY Electric Car Forums banner
Cancel

G35 Battery help

2429 Views 28 Replies 10 Participants Last post by  brian_, 
C
So I was considering converting a g35, mainly because with the factory aero kit it has the same drag coefficient as a model s (.26) and that's before you plug up the grill that's used for the intake.
My big problem though is trying to use the battery calculator thingy. converting ev power is way different than what im used to in converting hp and such.

So my main question is how many miles of range can I expect from let's say 1 lithium ion car battery? (or 10 if it's easier)
I know it's relative to weight, drag, and powertrain loss but ballpark would be great. Or if there's a rule of thumb im unaware of, I use to hear that 1 lithium ion pack was the equivalent to 10 miles of range, does that seem right?

I saw that the standard model 3 has a 50kw battery pack for the 200+ range, which sounds great. I want to use an optima yellow top, specifically a d51, and can't seem to find the wattage/kw. From what I've found it's maybe 9kw? that doesn't sound right though. Basically if I had 5 or 6 of the optima batteries then that's the same a the Tesla battery pack? Is that right? I'm not sure but I think im missing something.
Reply
Save
Like
21 - 29 of 29 Posts
T
I think it better to leave it to a professional who has the necessary experience and training to get the job done right.
Reply
Save
Like
P
Classycrusader said:
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.
Click to expand...
The old rule of thumb was car weight divided by ten, times KWH of battery gave you miles range kinda of
tmemphiselec said:
I think it better to leave it to a professional who has the necessary experience and training to get the job done right.
Click to expand...
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?
Reply
Save
Like
C
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 😬
Reply
Save
Like
F
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
Reply
Save
Like
R
Classycrusader said:
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 😬
Click to expand...
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.
Reply
Save
Like
C
floydr said:
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
Click to expand...
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.
See less See more
Reply
Save
Like
F
LG CHEM Lithium Ion Battery - 60.8V, 2.6kWh
This item is currently not available.
later floyd
Reply
Save
Like
R
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?
Reply
Save
Like
B
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?
Reply
Save
Like
21 - 29 of 29 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
DIY Electric Car Forums
A forum community dedicated to DIY electric car owners and enthusiasts. Come join the discussion about electric vehicle conversions, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
All EV Conversions and Builds Batteries and Charging Technical Discussion New Member Introductions eBay EV-Related Auctions
Top