More and more car makers are using lithium-ion battery. This is one of the in-demand batteries for electric cars. However, new research into the lithium-ion batteries used in electric and hybrid vehicles may produce a battery that yields an extended range for the motorist, as well as eliminating the fire risks associated with the batteries presently being used. The secret, says the report, is in trading out the liquid electrolytes for a progressive solid form. Resource for this article: Improving electrolytes for lithium-ion batteries.
About the CO2 efficiency of EV: Nissan Leaf is said to have 160 km range with 24 kWh. With the Italian average energy mix, there is about 500 g/kWh, so the Leaf is going to be somewhere around 70-80 g/km, which is in reach of the Prius (87 g/km) and some clever diesel. AFAIK, California is going to apply a 130 gCO2/mile for EV emission estimate. Of course, one could buy green certificates along, so he/she could actually claim to be driving at 0 grams per km. There are no green certificates for gasoline, so EV is nearly the only choice in this last case (except biofuels).
Suggest an interesting reading: http://www.transportenvironment.org/Publications/prep_hand_out/lid/568 (pdf 80 pages) about the impact of EV in Europe in the next ten/twenty years.
iniewski - your intuition is 100% correct, and (like me) you will meet with much disagreement by well-meaning but misinformed people about the merits of EV's. Pure EV's do almost nothing to reduce total energy usage or CO2 vs. hybrids, or even high efficiency (non-hybrid) turbodiesels for that matter. This is factual and can rather easily be proven. The FOCUS of the technical community should be to create renewable energy sources to power the grid. THEN (and only then) can EV's have a net positive effect. I prefer Solar Thermal powerplant technology, but we should deploy any kind of solar and wind power that makes economic sense. However, even then, it may not be the best course of action to change to EV's. A more practical leveraging of the (massive) existing infastructure is to create solar-synthesized fuels (such as Algae-based biodiesel or gasoline). This keeps all the advantages of today's ICE cars, gas stations, etc. but is renewable-based and net CO2 neutral. The coal, lithium and power company lobbies would really like everyone to believe EV's are a great near-term solution - but they are not (yet).
I believe every one has neglected to mention the cost of an EV is about 18,000 dollars more than a conventional ICE. This a very important point, that is why Dr.Ferdinand Piech, the CEO of VW has completely stopped development of the EV because of the cost to set up production for an EV is 15 billion dollars and the additional cost to the consumer is ridiculously high and they could never recoup that investment until they owned the vehicle for 12 or more years.He has decided to pursue a better internal combustion engine.
There is also an engine development company called the Scuderi Group,LLC who has been working a on a new engine called the Scuderi Split Cycle engine, which they have been working on since the late 90's. Their engine reduces NOX by at least 80% and CO2 by 50% while increasing fuel economy by 50 to 100 %.The prototype engine has been running now 16 months at South West Research in San Antonio Texas and outperforming the computer modeling they have done so far. The Scuderi Group is now in negotiations with many of the major OEM'S around the world and hoping to secure licensing agreements with many of them over the next six months. The Scuderi technology has become so compelling that the OEM customers around the world are showinggreat interest in the technology and have signed non disclosures to have access to the data at SWRI in San Antonio. The Scuderi group has nda's fro the following company's around the world : Daimler in Germany, Honda in Japan, Nissan in Japan, Renault in France, Peugeot in France, Fiat in Italy as well as all the car companies in India.
The clear solution is plug-in hybrid electric (PHEV) cars. Short trips could be powered by the batteries (10 miles may be the best balance between battery cost and mpg) while the gasoline engine would kick-in to enable the longer distances that families must travel from time to time. I've driven over 88,000 miles in my Honda Civic Hybrid with an average over over 50 mpg. The added cost of my hybrid was paid back years ago by the gas savings. My only regret is that it cannot run on pure battery and the short trips to the grocery store kill my average mpg. I can't wait until a PHEV version is available. As an extra bonus, I'd love to have a good vehicle to grid (V2G) power output available for when power fails. A friend of mine powered his country house for a week on an inverter off a his Toyota Prius battery after the big storms in Massachusetts a few years ago.
To gasoline66: that was the best comment I ever red, I think the Bush administration would have loved it!
Seen form outside US, the perspective is quite different:
1 - US cars are far from be efficient in terms of consumption
2 - The US automotive industry knows very well that Diesel (from Europe for example) is already able to provide US citizens RIGHT NOW, with the big, reliable and silent car we all love, reducing fuel X2 and environmental impact X4 at same car price and performances and ensuring high reliability and autonomy in urban and extra-urban cycle.
3 - The US automotive industry is lobbying to have US citizens believe that the only way to drop consumption is go to disruptive appoach, as HEV or EV, carefully missing to say that it will be 10 or 20 years before you get decent autonomy and refuel network as you have already for diesel.
4 - Europe an Japan car makers know they will have to go HEV sooner or later, not because of oil reserve do drop in 2125, but because of very high fuel price and city pollution right today! (Much more difficult and umpractical to organize wars to get oil, public opinion would kill you). So R&D on HEV/EV must be sponsored someway. Big opportunity: US guys are now interested to the business, so let's get US buy a lot of HEV and pay the cost of R&D to the rest of the world. After all, US guys rich: they can afford to get 2 cars instead of one: HEV to go to work an highly ineffcient gasoline to get on trip with the family. Please, don't tell US guys that Diesel is there, cheap and available the time that EV will turn into anything serious...
By the way, there is a parallel forum on the other EDN article on diesel vs. HEV that may be interesting to follow.(http://www.eetimes.com/design/automotive-design/4207375/Diesels-challenge-hybrids-for-efficiency--low-emissions?cid=NL_SmartEnergy&Ecosystem=smart-energy-design)
Forget all this silly talk of .02/mile fuel cost, zero emissions, multiple alternative fuel sources, etc. Gasoline is the only way to go. Sure, we go into foreign lands, kill their people and steal their resources in order to drive our behemoths, but so what? We are entitled. It's all about U.S. exceptionalism. There are good reasons why North America consumes 86% of the world's natural resources, and, quite frankly, my producers own you and everything between your fill-pipe and Washington D.C. Every day the TV tells you consumption drives our economy. You should listen. Forget change. You're doing just great- please continue...
How is everyone feeling about something more radical: limit car use (of any kind) and use EV buses/street car for massive transportation within cities? That should be more planet saving than just adding EV cars as a second family vehicle...Kris
Blog Doing Math in FPGAs Tom Burke 15 comments For a recent project, I explored doing "real" (that is, non-integer) math on a Spartan 3 FPGA. FPGAs, by their nature, do integer math. That is, there's no floating-point ...