Another factor to consider is that while power capability varies by design, 
as a general rule, smaller cells are usually capable of lower power output.

For example, the CALB 40ah cells I mentioned are rated for a maximum 
discharge of 2C (80 amps).  At 144v, 80a is 11.5kW.  Allowing for losses, 
that's only about 12hp from your motor!

Not being a lithium expert, I don't know how much more than this you can 
actually draw before voltage sag really kicks in.  But I'm pretty sure that 
pushing them too hard will shorten their lives significantly.

If you expect sporty, Mustang-y EV performance, but don't want to carry 
around much of a battery, you'll need to find some cells designed for high 
power.

The 90ah Winstons I mentioned are rated for only 1C continuous, but they say 
you can draw 10C for 10 seconds.  It looks like you then need to allow at 
least 50 seconds of either zero or much lower current for the cell to 
recover (how often you can do this isn't clear from the spec).  Other folks 
here may know how realistic this is, and/or have some recommendations for 
high power lithium cells.

David Roden - Akron, Ohio, USA
EVDL Administrator

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