siai47, I appreciate your posts and and enjoyed your description of the cooling diversion
, as well as the jaraczs' photographs of the battery ducting
. I also understand your frustration with having purchased a second iMiEV, only to find that it is missing all the battery ducting that your previous leased vehicle had. Your concern is quite evident in your various posts on this subject.
I submit that perhaps our iMiEV situation is less dire than the Nissan Leaf's. So far, the iMiEV seems to me to be a pretty-well-engineered car. Mitsubishi had significantly-more experience with electric cars than Nissan when they placed it on the US market, and I seem to recall reading somewhere that the iMiEV's cell internal resistance is less than the Leaf's (resulting in less internal heat generation under load). Mitsu's concern with batteries seems to be more related to low temperatures than high, perhaps a result of a battery chemistry formulation more favorable to high temperatures than Nissan's(?). The absence of forced-cooling (except for CHAdeMO-equipped cars) reflects this. Since, as was pointed out, the addition of this cooling ducting would have been a minimal cost item for them, I would think that their internal benefit-cost analysis would have erred to the conservative if they thought there might be an issue.
Nothing so far points to an iMiEV capacity-loss that Nissan has experienced with their Leaf in the extremely high temperature southwest US environment - quite frankly, even their situation is quite limited, and the Leaf owners' paranoia over losing some capacity is perhaps a bit overblown, IMO, they having the advantage(?) of vehicle instrumentation that can make them nervous. Reality is, that unless we have a fixed daily commute that pushes the iMiEV's range limits, it's really hard to quantify any capacity loss because of all the other variables that can affect range. Time will tell…
My reason for posting this is to try to allay an possible concerns that non-techies might be having as a result of this discussion. So far, nothing is pointing to any battery issues with our iMiEV, at all.