Bold claim? Maybe.
It’s pretty simple, really, and I have a hard time believing that no one has ever thought of this before… but here goes…
What’s the big complaint with electric cars? The inconvenience of recharging.
What if you could take recharging out of the equation from the driver’s perspective? That’s not to say that I have come up with a battery that stays perpetually recharged, or a way to recharge a battery in the time it takes to fill the gas tank of an ordinary car. Not at all. What I propose is a quick-change battery pack. This would have to be a pretty substantial battery pack. It wouldn’t be the sort of thing that one person could lift. But what if you could come up with a “universal automotive battery pack”… one that would fit in Fords, Chevys, Toyotas and Citroens just the same? Then you could set up rechaging stations kind of like a “Blue Rhino” propane tank exchange place.
There would have to be some sort of “battery pack puller-outer thingy”, probably operated by an attendant, and there would have to be hatches on the cars to gain access to the batteries. If NASCAR pit crews can change 4 tires and fuel a car in 30 seconds, I would imagne a couple teenagers could swap out a couple battery packs in 5 or 10 minutes.
This idea requires car designers to rethink the layout of the garden variety car, but I would think that if you could put a smaller electric motor directly geared to each wheel, rather than one giant motor and a transmission, you could open up a great deal of space… the whole nose cavity, and a good chunk of the space under and behind the rear seat could be used for batteries. You could also reduce the energy wasted on bearings and gears through most of the drivetrain of a conventional car. This would also allow the drive motors, if properly designed, to act as generators to recharge the batteries a bit while stopping and going down hill.
Another advantage of the “universal automotive battery pack” idea is that, as battery technology improves, the package of the battery remains constant, but the guts get better. For radically different battery technology it may be necessary to upgrade controller firmware to accommodate the new charge rates or whatever… but that could also be included in the battery pack. The battery pack is plugged in and its charge and discharge profile is uploaded to the car’s computer. Huzzah!
…and get this! If the car was also equipped with a 120VAC charging circuit, and you were so fortunate as to be able to cover a day’s driving on one charge, then you wouldn’t even need to get your battery packs changed out… just pull the car into the garage at your house (or whatever), plug it in and go to bed.
When you DO go into the charging station, and get your batteries swapped out, the batteries that come out of your car are tested, and either reconditioned as necessary and recharged or sent for recycling. Obviously getting charged at the station would have to be more expensive than charging at home, to cover the cost of the testing and reconditioning, as well as the staff, equipment and so on. Considering that gasoline is on the fast track to $4.00 per gallon with no end in sight, and modern American cars are only getting around 20 MPG, it seems to me that paying $20 or $30 so for a quick recharge to get you another 100 or so miles down the road ain’t so bad.
“BUT,” the environmentalists may say, “Coal is far more polluting than gasoline, and most of America’s power is generated using coal, so you’d actually be polluting MORE with electric cars, than with gasoline-powered cars.” Well, perhaps. Then again, maybe not. See, when you’re sitting in traffic, you most likely let your engine idle, and that wastes energy AND pollutes. Apart form the trickle of electricity needed to run the computer, lights and radio, an electric car consumes no energy and generates no pollution on its own when stopped in traffic. In addition, replacement of coal-fired generating plants with more environmentally sound generating plants (such as nuclear, solar, wind, geothermal, tidal, and so on) can be done with virtually no change in the distribution infrastructure for electricity. This means that your car doesn’t care HOW the electricity is generated, only THAT it is generated.
I recognize that this idea would require a tremendous paradigm shift in the automotive industry, but the good news is that, if it’s done right, it would really only have to be done once. If the US can go from “we can’t get a rocket off the launch pad” to “we sent humans to the Moon and returned them safely to Earth” in a little over 10 years, we can go from being the largest per-capita polluter in the industrialized world to the smallest in the same timeframe, and probably for no more than it cost us to invade and occupy Iraq, which, lets face it was done for the oil and achieved absolutely nothing good.