Luigi goes electric. Fiat 500 R + Agni 95-R
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Very nice, great combination of drive and car, I've been looking for a cheap Fiat 127 to pop an Agni into myself. The 127 is the smallest car you can actually fit a double bass into
What size battery pack do you think you'll be able to squeeze in?
Steve
What size battery pack do you think you'll be able to squeeze in?
Steve
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121 Posts
Hi guys,
My plan is to use 26 Lifepo4 150Ah packs. They would be located in the front and in the back. But as you know that involves alot of $ so I guess I will start of with lead acid 50Ah just to get everything up and running.
Best regards
Rikard
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1,626 Posts
From the graph I have find, a 50Ah lead battery will be rated at 20Ah when you discharge it at 2C (100A). 100A x 72v is just around 8hp!
So, because the 50Ah battery will cost 600-900$ (100$-150$ each) and because you can only use around 15-20 Ah of those cells, if it' just to do some test, you can maybe keep an eye on small LifePo4 cells.
For example, 26 cells 38120s 10Ah will cost around 400-500$ and 26 cells 40160s 16 Ah will cost around 700-800$.
Maybe this 20Ah: http://www.ev-power.eu/?p=p_46&sName=lifeypo4-cells-(3.2v)
I used 7 Kg of headway 10 Ah in my Smart fortwo to do some test. That worked great.... for short travels at low speed!
It's just an idea!
So, because the 50Ah battery will cost 600-900$ (100$-150$ each) and because you can only use around 15-20 Ah of those cells, if it' just to do some test, you can maybe keep an eye on small LifePo4 cells.
For example, 26 cells 38120s 10Ah will cost around 400-500$ and 26 cells 40160s 16 Ah will cost around 700-800$.
Maybe this 20Ah: http://www.ev-power.eu/?p=p_46&sName=lifeypo4-cells-(3.2v)
I used 7 Kg of headway 10 Ah in my Smart fortwo to do some test. That worked great.... for short travels at low speed!
It's just an idea!
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121 Posts
Hi yabert!
You got a good point. Testing with low amp lifepo4 also gives me a chance to learn more about bms and charging. Ideal would be to be able to use the cells from test in parallel wither real pack, but i guess the discharge C would be a problem.
What about pouch cells? Those are minimal in size and weight, what is the draw backs?
What are your recommendations regarding bms? It would be nice to have a bms and a charger that can communicate.
Best regards
Rikard
You got a good point. Testing with low amp lifepo4 also gives me a chance to learn more about bms and charging. Ideal would be to be able to use the cells from test in parallel wither real pack, but i guess the discharge C would be a problem.
What about pouch cells? Those are minimal in size and weight, what is the draw backs?
What are your recommendations regarding bms? It would be nice to have a bms and a charger that can communicate.
Best regards
Rikard
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1,626 Posts
Nothing except the more complex multiple connection. But don't mix batteries chemistry.
I use Mini BMS: http://minibms.mybigcommerce.com/
Simple, low cost, communicate with charger.
etc...
I also use her EV display.
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4,326 Posts
cost....
bang for buck, and reliable delivery from a US warehouse, ease of wiring into a pack, I'd say CALBs are the current winner.
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1,317 Posts
I'm testing with a small pack of 20ah A123 pouches, 100lbs of battery gives me about 30km and good power and a top speed over 120km/h. I've also tested with 50lbs of battery and I get less range and speed, but works very well.
These cells are great because even a 60ah pack lets me draw 1000A without destroying anything.
How far and how fast would you get with 50-100lbs of lead?
These cells are great because even a 60ah pack lets me draw 1000A without destroying anything.
How far and how fast would you get with 50-100lbs of lead?
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121 Posts
Major update! Adapter plate is now done! Check it out!
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Hi Yabert,
It's a KDC 72601 and I think you might be right. That why I'm adding additional cooling. I got the Kelly with the motor, it's second hand.
It's a KDC 72601 and I think you might be right. That why I'm adding additional cooling. I got the Kelly with the motor, it's second hand.
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121 Posts
Hi all,
A new update on the build. I've been playing around with the Kelly and found some undocumented features when it comes to regen. I'll post the findings in the right forum.
An update has been posted on http://luigi500.blogspot.com/2011/12/choice-off-controller.html
Anyways, thing are looking good and I now have 90Kg of lithium's in my livingroom
Best regards
Rikard
A new update on the build. I've been playing around with the Kelly and found some undocumented features when it comes to regen. I'll post the findings in the right forum.
An update has been posted on http://luigi500.blogspot.com/2011/12/choice-off-controller.html
Anyways, thing are looking good and I now have 90Kg of lithium's in my livingroom
Best regards
Rikard
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