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We can use the cell to configure the pack as close as possible to the reg’s max energy capacity. Because of the reg change, MS16 battery pack will have less energy than MS15 battery pack (likely by around 1kWh) [8]. If we’re going to have less energy this car, we want to have as much energy as we can still get.
The cell will strike a balance between lower capacity (which will lead to more total cells and a higher parallel count → less load for each individual cell → better thermals) and a “reasonable” weight/volume.
Relative to aerodynamic drag, weight has a small effect on the efficiency of the car (rolling resistance accounts for 14% of spent energy while aerodynamic drag accounts for 77% based on Forest’s calculation [89].
Cell Selection Organization + Timeline
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[9] https://docs.google.com/presentation/d/1C4GlFdyFLaSJIhRW-QnGZWU_KHUQxUT-ykzU_RGqzS4/edit?usp=sharing