"Everyone thinks that battery-electrics are the ultimate solution and everything else is just an intermediate step," Michalek told us. "But that's not necessarily the case. In our study, BEVs (battery electric vehicles) are worse."
That's good news for consumers who are interested in preserving the environment, but don't want to spend big bucks doing it. Because batteries still account for a large percentage of the cost of electrified vehicles, hybrids with smaller batteries would typically cost less than comparable pure electrics with larger batteries. Moreover, hybrids also offer the convenience of greater range.
To be sure, Michalek's numbers could change if electricity suppliers go to a bigger diet of renewable power in the form of wind and solar. "In a world where all our electricity is coming from cleaner sources, BEVs could be the best," Michalek said. "They might even be the cheapest. But there's no guarantee we're ever going to get there."
The irony of all this is that public policy now favors bigger batteries, largely because it's assumed that BEVs pollute less. Subsidies from the federal stimulus package give as much as $7,500 for vehicles with batteries sized at 16 kWh or larger, but $2,500 for smaller, 4 kWh packs. "The larger the pack is, the more public money we're spending on it," Michalek said. "But the truth is, bigger isn't necessarily better."
I doubt this will change anything in the short term, Cabe. There's no window right now for making changes to policy. What it will mean in the future is anyone's guess. Regarding the Prius: Toyota has a plug-in called the Prius PHV and it has a relatively small, 4.4-kWh battery.
It is good to hear that full EVs are bad for the environment, to some degree. I assumed the battery fabrication was fairly high prices already. As I have been hoping for the day of owning a complete EV and avoiding the pump, now I see I will need a transitional vehicle until battery tech makes the footprint smaller. Plug in Prius on the way...
However, do you think this will inhibit development on EVs in the future?
This makes sense, Chuck. Unlike the EV, the hybrid charges itself instead of taking electricity off the grid. Given that so many grids are generating electricity from coal, I can see where a hybrid would produce less carbon than an EV.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.