[e^2]

So I'm beginning to get my traction batteries balanced and ready to wire but I have a question. My batteries are these:

http://www.techdirectclub.com/lot-o...cart-bosch-battery-5-cell-18-5vdc-1-1kwh-10c/

And I have 18 of them that I will wire to make a 30S3P pack (120V 180AHr). The wire in the car now is 2/0 between the battery leads and controller (car is currently on lead acid pack of 96V).

A. Should I run the new batteries in a 5S3P first and then series those together? Or run a 30S and then parallel the strings only at the top?

B. If the jumper length is short, less than 4" long, I should be okay to run a 4 awg wire, yes? My battery studs are M6 and there isn't room to run 2/0. If I split the load evenly across the packs, there won't be more than say 200A peak through each string.

Thanks!

 

[e^2]

Yes, those voltages on the boxes are how they were delivered. I now have two groups of 6 each at the same voltage (one group at 20.4V, the other at 19.4)and have been using a 24VDC switchmode power supply charging these up to the 20.4 volt level, which is the highest voltage that was delivered. I'll get these all at the same level and then do a discharge, measuring as I go. I really hope I don't have any bad cells but I have only checked pack voltage, not cell voltage.

And I just discovered today that these are Fiat 500e batteries.
http://www.diyelectriccar.com/forums/showthread.php/fiat-500e-battery-modules-170329.html

 

[e^2]

Thanks. My controller is 600A and I'll have three banks of batteries, so 200A per bank peak. My batteries have their posts on opposite corners so for the most part, the leads will be very short. All the long leads will be bigger gauge.