I'm not including the Prius route of "Brakes + Regen using the brake pedal" in my suggestion at the top of this thread for several reasons, some of which have been pointed out:
1) This would likely take additional R&D and hardware not already present on the Model S
2) Energy lost to friction is energy not recovered in the pack
3) I'd rather not incur brake pad wear that's just wasteful
4) This requires a two-pedal driving effort and foot transition I'm trying to avoid in the non-panic stop scenarios I mentioned at the outset.
As for the physical limits, I doubt that safely charging the battery at this level is one of them... we already have 90KW Supercharging today, and we know 12KW is coming.
You might be able to make the case that the rear wheels have less braking potential than the fronts (which is typically the case as inertia pitches a car forward during braking), and you don't want to push the limits of tire adhesion... but with the weight of the car, including battery pack and motor/inverter over the rear axle, it doesn't feel like we are really anywhere close to that with the current 60KW setting...
1) This would likely take additional R&D and hardware not already present on the Model S
2) Energy lost to friction is energy not recovered in the pack
3) I'd rather not incur brake pad wear that's just wasteful
4) This requires a two-pedal driving effort and foot transition I'm trying to avoid in the non-panic stop scenarios I mentioned at the outset.
As for the physical limits, I doubt that safely charging the battery at this level is one of them... we already have 90KW Supercharging today, and we know 12KW is coming.
You might be able to make the case that the rear wheels have less braking potential than the fronts (which is typically the case as inertia pitches a car forward during braking), and you don't want to push the limits of tire adhesion... but with the weight of the car, including battery pack and motor/inverter over the rear axle, it doesn't feel like we are really anywhere close to that with the current 60KW setting...