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Extended Range Battery Pack

21

Description

Extend range to ≥500 miles (or more) by making existing battery pack scalable/upgrade-able/swappable .

Competitive/Pricing/Notes

Moderator: The current pack is already scalable/upgradeable (85 to 100) and swappable. To make a far larger capacity battery today would require an entire vehicle redesign to handle double the batteries and double the pack weight.  This would impact the structure, cabin space, suspension, brakes, tires, and steering and would come close to an entirely new vehicle design. Cost would also likely add $50-100K for a 500 mile battery pack vehicle (with today’s technology).

Update: The new Roadster has been announced with 600 mile range and a 200 kWh pack.

Status

Unknown.

(lightly edited by moderator)



Category: Tags: entered 30-Sep-2015
Mo
35

3 Comments

I personally feel deceived about the swappable battery. This is what convinced me to go with Tesla as opposed to another car. Superchargers suck; way toomuch time.  I wanted an option I could pay for that would equal a tank of gas.
The new scalable 90kWH battery isn't an add-on to your existing battery but a total replacement for ~$22,000. That's not what Elon said in his release letter but it's not surprising that he says one thing but means another.

The new 400+ miles car is coming in the future. I may not be alive then, since they are consistently 2-3 years behind schedule for new releases.
Battery advancement in terms of energy capacity per unit weight and/or volume has a lengthy development cycle to verify that changes to electrode and electrolyte formulations don't introduce unforeseen flaws that would compromise the design. The battery box is pretty big already and not likely to grow in size. This means that the battery technology must be advanced to gain meaningful added capacity. It is estimated that a 135 kwh pack of the same or smaller size than the current pack would yield a 500 mile range for a car that weighs 3000 to 3300 pounds and that has the same or lower drag coefficient than the current Model S. However, optimal average speed on a road trip would be obtained by driving about 75 mph between charging stops that are 300 miles apart so that the "upper" 40% of the battery capacity would not have to be used between SCs in order to minimize recharging times. Not going to happen for a long time IMO.