Interesting article on Coda's acquisition of the company that helped them put together the battery management system, which Coda claims is more sophisticated that Nissan's system for the Leaf. Coda also claims their thermal management system is more effective than Nissan's. It is still an air system, but it is "higher" volume. I guess that means they have a bigger fan and maybe more ports or bigger ports?
For people concerned about how the battery will perform 5 years down the road or more, these systems are very important, which is why GM's and Ford's decision to go with a liquid thermal regulation system is the safer bet.
The battery management system is likewise very important. The BMS insures that all of the cells within the battery pack stay relatively balanced. Allowing a cell to become seriously out of balance with the rest of pack threatens not only that cell but the entire pack. But doing this most effectively can only be achieve if all of your cells are at the same temperature or very close to it, which is why I have serious qualms about these air regulated systems.
http://gigaom.com/cleantech/electric-ca ... ment-tech/
http://gigaom.com/cleantech/get-ready-t ... ric-sedan/