[dougingraham]

I think you are trying to improve performance where you dont need to. If you have room for a 48 cell pack of 100AH calbs and a 48SXP pack where X is some number large enough to give you a stiff pack then you probably have room for a 48 cell pack of 130AH Calb cells. Maybe even 180AH size Calbs. The 100AH cells can do 800 amps for 10 or so seconds easily and your 500 amps for much longer than you probably need. If you have room for 48 of the 180ah cells use those. They can do your 500 amps continuous. I suggest you keep it simple and just use the prismatic cells. I think the additional cost of the headways would be more than going to the 180AH cells and the performance increase will be minimal. If you were going to do a really high power system then I would suggest a different answer.

[skooler]

Originally Posted by dougingraham

I think you are trying to improve performance where you dont need to. If you have room for a 48 cell pack of 100AH calbs and a 48SXP pack where X is some number large enough to give you a stiff pack then you probably have room for a 48 cell pack of 130AH Calb cells. Maybe even 180AH size Calbs. The 100AH cells can do 800 amps for 10 or so seconds easily and your 500 amps for much longer than you probably need. If you have room for 48 of the 180ah cells use those. They can do your 500 amps continuous. I suggest you keep it simple and just use the prismatic cells. I think the additional cost of the headways would be more than going to the 180AH cells and the performance increase will be minimal. If you were going to do a really high power system then I would suggest a different answer.

+1 on that.

Keep it simple, the added cost and effort is better invested elsewhere.

[MalcolmB]

If you really want to know if it will work why not just try it on a small scale first? You could parallel a few Headway cells with a single prismatic, using roughly the same cable lengths you plan to use in the car. Then just connect them to a dummy load that matches your expected current draw and see how the cells share.