Quote:
Originally Posted by -c-
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The four (4) key variables for comparing batteries were:
- price/kWh (cost)
- kWh/kg (power density)
- kWh/m^3 (power output)
- battery cell longevity
It's interesting that BMW focused on the last one, optimizing projected battery lifespan (20.9 years) at the expense of higher cost and energy density.
It somewhat makes sense that a traditional automaker would do that, but it is otherwise a misguided target. Battery technology is advancing way more rapidly than OEMs are used to, and the customers who still own EVs 5-10 years down the road will be more interested in upgrading to 2x-4x higher density cells, than tracking the level of degradation of the old batteries !
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