I'm buying a used EV, and I'm thinking forward to upgrading to M1s out of
DeWalt 36V packs.
If I've done my math right, at 3.3V x 2.3Ah per cell, a single pack
represents 75.9Wh. It would therefore require approximately 13.2 packs to
build a 1kWh pack and 132 packs to build a 10kWh pack. I can purchase brand
new packs all day long for $105 (shipping included) on eBay. At $105/pack x
132, it looks like I'd end up at $13,860 for my 10kWh pack. Is there a
better source/price for A123 batteries at the moment?
An area in which my thinking is very unclear is design, cost, construction,
and integration of a bms. Is there a tried and true open-source design
available (my father is an electrical engineer but he'd balk at designing
something from scratch)? If so, how much should I expect to pay in materials
for a bms for a 10kWh pack? Is there a reasonably sophisticated
off-the-shelf bms available for M1 cells? If so, who sells it?
Lastly, who needs a kidney? I'll need to sell one to pay for all of this...
Lon Hull,
Portland, OR
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
DeWalt 36V packs.
If I've done my math right, at 3.3V x 2.3Ah per cell, a single pack
represents 75.9Wh. It would therefore require approximately 13.2 packs to
build a 1kWh pack and 132 packs to build a 10kWh pack. I can purchase brand
new packs all day long for $105 (shipping included) on eBay. At $105/pack x
132, it looks like I'd end up at $13,860 for my 10kWh pack. Is there a
better source/price for A123 batteries at the moment?
An area in which my thinking is very unclear is design, cost, construction,
and integration of a bms. Is there a tried and true open-source design
available (my father is an electrical engineer but he'd balk at designing
something from scratch)? If so, how much should I expect to pay in materials
for a bms for a 10kWh pack? Is there a reasonably sophisticated
off-the-shelf bms available for M1 cells? If so, who sells it?
Lastly, who needs a kidney? I'll need to sell one to pay for all of this...
Lon Hull,
Portland, OR
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev