richs wrote: ↑
Wed May 20, 2020 5:50 pm
the 2017 model has "27.2 kWh available". That's interesting, because my car reports a Batt. Kapa. max of 29.5 KWh!
One thing that's interesting about this is that depending on what measure you look at, the 2017 vs. the 2014 battery may have:
1) 157% capacity (94ah / 60ah),
2) 150% capacity (33kwh total capacity/ 22kwh total capacity)
2) 145% capacity (27.2kWh usable / 18.8 kWh usable)
Picking the middle number, if it was 150%, the usable capacity would be 28.2kwh on the 94ah battery, so that essentially "buys" BMW another kWh of capacity to use for the upper or lower buffer. That wouldn't explain consistent readings over 28.2 but it gives them a possible opportunity to help with battery management.
Potentially understating the capacity to 27.2 also means your battery capacity would have to drop below 19.04 kWh to trigger the warranty as opposed to 19.74.
These aren't massively different, but I find it interesting. Both factors play in BMWs favor: giving an extra kWh to battery management and lowering the warranty threshold a bit might combine to be a meaningful difference in warranty claims.