- Improves the car to lithium mined ratio by greatly increasing battery utilization
- improve MPGe to over 150 (100-130 is norm for sedans) for full size vehicles for typical driving cycles (stop and go are more sensitive to pack weight vs aero). This is a big deal, improving mpge by 20% accelerates a virtuous cycle like improving specific impulse does for rockets. It can greatly reduce vehicle costs, charge times, energy use for miles driven, etc. Biggest effect might be with trucks. They have a wider range envelope because of payload use. A large truck with modular packs would be able to both reduce costs for most driving yet retain tremendous range for long/heavy trips.
- reduces an already lower maintenance cost for EVs by reducing tire wear (number one maint cost for an EV). For 95% trips, a comparable vehicle would weigh less than the ICE equivalent. trimming 600-800lbs from sedans and >1000lbs from trucks. again, for most trips.
- longer battery life (batteries fail as outliers, modular packs reduce the effect of outliers)
- more upcycling vs just recycling. significant after market for a standardized pack. Used packs are still good for less energy intensive use in home storage, RVs, motorbikes, side by sides, tools.
- reduce charge time for long trips (swap and go is faster than fueling an ICE). More time allowed to condition packs in charging station instead of in car.
- Smaller/cheaper/more plentiful charging "stations". Like the propane exchange cages at the local quickie mart. Cassette system charges/conditions/tests packs.
- Improved charging station surge capacity. All packs for a rush period don't have to be charged in that rush period.
- increases competition for the most expensive component in a car.
This will heat up in the next 5 years:
- at current organic rate of improvement in the battery industry, we should see a 40lb, 15kwhr (50 mile) pack. industry standard connector for power/data/glycol cooling (or do transfer cooling through housing). Shaped like a blade server.
- Typical car might have have 8 bays (4-6 under passenger compartment, 2 or 4 under trunk and frunk). Sold with 2 packs standard (more than enough per study in OP above). Extra packs can be bought used, rented, borrowed from neighbor (coop), bought with home energy system, etc.
- one of the reasons for larger packs even though they are not used is for the peak energy capacity of the system. a larger pack can deliver a higher peak energy (better 0-60 acceleration), Smaller packs can do this if we use a mix of lifepo4 for the base and regular lithium for the road trips (standard packs in 2 chemistries available).
Exceptions are a commonly used tool of marketing "you need this extra capacity just in case". But stats don't lie. Most driving would really benefit from less range.
btw, been driving EVs and hybrids for over 2 decades. It is full every morning. don't have to wonder if someone forgot to get gas. Always ready for a quick out of town trip if needed vs our ice we often had to stop as the gas station first. Our driving is pretty typical and for us, we spend less time "filling up" than we did with our ICE. Figure 30 trips to the gas station each year at 10 minutes each vs 3 seconds each for my EV plus a few public charger uses for our out of town trips. And when we do stop, it is a bit more interesting of a place than the corner gas station.