PV1 wrote:That's one of the big things I wonder about this is how to get the car to access the expanded capacity of the new cells, unless that's what the turtle is for. I would imagine the car counts kWh to run the charge gauge and RR, but once it thinks the battery is "empty" (no bars and '---' RR), it will resort to turtle (a low power mode) and watch the voltage until one or more cells hits LVC. It should then be able to re-calibrate from the new empty point and have access to the full 29 kWh of available capacity.
I guess it'll take one of us actually doing it to find out if the i-MiEV functions like this. If the car won't use the full capacity of the new pack...well, someone has an awesome battery pack for backup power or off-grid solar.
I see it very easy. I think is just easy as this: Add the entire complete modules, with their electronics. Then just connect them. Then just replace in the software the number 16 kWh by 29 kWh. The car will then know that every 5% bar will correspond to something like 1,5 kWh and turtle will only be there when it has only 2,9 kWh. We all know that there are Peugeot Ion of 14,5 kWh - they show all the 16 bars. The diference is that they know that 100% SoC is 14,5 kWh.
I´m sure it will not recalibrate by himself so easily. It knows that tomorow it could have 10% less capacity because temperatures had go down 20ºC or something like that. So, it will not do that for one day to the other.
For me, I don't see a reason why it should be dificult to add 8, 16 or 24 more cells, Peugeot did it, taking 8. My car did it, 16 bars (Turtle - 10%, 2% ---, 5%, 5%, 6%, 6%, 6%, 5%, 5%, 5%, 5%, 5%, 5%, 5%, 5%, 5%, 7%, 8% SoC), all perfect. I mean exactly all perfect. All by himself (i think). How this is possible, well, one miracle happened, in the first days of March, it recalculated his capacity to 12,75 kWh. In february, I had a 16 kWh i-MiEV but i could stop with the car showing something like 14,5% SoC. Now, well, I just keep going until it gets to 0,0%.
3 years (exactly), something like 63.500 km, 15º C medium ambient temperature, and an 12,75 kWh i-MiEV - Believe it or not. I'm sure about what i'm telling you. The canary keeps singing.
Riding an i-Miev since 4/2011 in Portugal, 100.000 kms.