This presentation was given at last weekends EAA Silicon Valley chapter meeting. One of the local members has gone through conversion of a Honda CRX. As he explains his goal was 100 mile range at highway speed, and he's most of the way there.
http://www.transferbigfiles.com/Get.aspx?id=855d8156-d0d5-4c79-9f55-ac814f466f69
The conversion uses thundersky 160 AH cells. Further the guy is a hardware designer (e.g. works on tiny USB powered devices) and he has applied that hardware knowledge to a custom designed battery management system. The BMS is on a board that is bolted directly to the power connectors on the cells. There is one BMS board per cell, and it relies on an on-board charger for each cell meaning it is using a bank charging system.
There's a lot of details in the presentation. You'll find the link to the PDF in the middle of that page.
