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Discussion Starter #1
Hello! So I am very new to EV cars and I've been doing a lot of reading. I'm probably a long way off from doing any projects but I'm super intrigued by all of this.

I'll get right to my question. Is it at all possible to put together a compact battery pack that can deliver anywhere from 140s to 180s volts have enough power to drive a Warp 9 or similar to 150ish lbs of torque and push RPMs to to 5,000 rpm.
Range would not need to be much. 10 miles would be enough for me.

I'm musing about the feasibility of adding a rear differential from a Golf R to my GTI and hooking it up to an electric motor. If I could get 10 miles range I'd be able to do the bulk of my local driving on electric power and maybe even run gas and electric simultaneously for an extra 150 lbs torque/100 HP to my existing engine.

whats the smallest battery setup that could support 800 to 1000 amps?

Thanks! I hope this is not the most stupid and ignorant question ever asked here.
 

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I hope this is not the most stupid and ignorant question ever asked here.
Definitely not :)

In fact, nearly identical questions have been asked a few times, generally summarized as "I want to add electric drive to the rear of my front-wheel-drive car for limited electric range; what do I need?" When I get a chance I'll try to remember to look up some of the other discussions and link to them.
 

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......
whats the smallest battery setup that could support 800 to 1000 amps?
.
As with many things in life, ...it depends on how much you want to spend !
But even a minimum 10 mile range, (say 10 miniutes duration?), at say an average of 400 amps (peak 800-1000a ) means you would need approx a 14kWh pack capacity
 

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Discussion Starter #4
Yeah so I am learning how expensive this would be... sheesh!
Please let me know if I have a decent grasp on things...

If I bought 46 3.2V 60ah batteries I'd end up with 147.2v and 8.8kwh
http://www.evwest.com/catalog/product_info.php?cPath=4&products_id=179
with 80% usefulness from the battery in a 3600lb car = 19 miles range.
But ultimately a 60ah battery would limit current?
The link states Maximum Discharging Current (10 sec.):8C - 480 Amps
There would be some gas engine assistance so battery would last a bit longer. Cost $3,726.00

If I bought 46 3.2V 100ah batteries I'd end up with 147.2v and 14.7kwh
http://www.evwest.com/catalog/product_info.php?cPath=4&products_id=208
with 80% usefulness from the battery in a 3600lb car = 32 miles range.
100ah batteries would allow short bursts of 1000 amps.
The link states Maximum Discharging Current (10 sec.):10C - 1000 Amps
But price rockets up to... $7,130? :eek:

I was looking at the Net Gains Hyper 9... looks sweet.
http://www.evwest.com/catalog/product_info.php?cPath=8&products_id=469
But I'd need a 100ah battery pack to support 760 amps? to actually hit the rated power?

Do i have this close? What's a better place to get batteries at a lower price?
 

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Discussion Starter #5
Yeah so I am learning how expensive this would be... sheesh!
Please let me know if I have a decent grasp on things...

If I bought 46 3.2V 60ah batteries I'd end up with 147.2v and 8.8kwh
http://www.evwest.com/catalog/product_info.php?cPath=4&products_id=179
with 80% usefulness from the battery in a 3600lb car = 19 miles range.
But ultimately a 60ah battery would limit current?
The link states Maximum Discharging Current (10 sec.):8C - 480 Amps
There would be some gas engine assistance so battery would last a bit longer. Cost $3,726.00

If I bought 46 3.2V 100ah batteries I'd end up with 147.2v and 14.7kwh
http://www.evwest.com/catalog/product_info.php?cPath=4&products_id=208
with 80% usefulness from the battery in a 3600lb car = 32 miles range.
100ah batteries would allow short bursts of 1000 amps.
The link states Maximum Discharging Current (10 sec.):10C - 1000 Amps
But price rockets up to... $7,130? :eek:

I was looking at the Net Gains Hyper 9... looks sweet.
http://www.evwest.com/catalog/product_info.php?cPath=8&products_id=469
But I'd need a 100ah battery pack to support 760 amps? to actually hit the rated power?

Do i have this close? What's a better place to get batteries at a lower price?
 

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... nearly identical questions have been asked a few times, generally summarized as "I want to add electric drive to the rear of my front-wheel-drive car for limited electric range; what do I need?" When I get a chance I'll try to remember to look up some of the other discussions and link to them.
This is the only one that I can find:
Hello! New member...
 

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Yeah so I am learning how expensive this would be... sheesh!
Please let me know if I have a decent grasp on things...

Do i have this close? What's a better place to get batteries at a lower price?
Yes you seem to be figuring the issues out.
But dont forget to compare weight also.

A common low cost source for this size pack is to locate a salvaged GMVolt pack (16kWh, 360 volt) , and reconfigure it to suit .
 

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Discussion Starter #9
Yes I've seen that car. Looks amazing! I'll have to take a closer look. I feel like most EVs I see are either ridiculously over the top fast or super slow. lol
 
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