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DOE and GM Unveil EcoCAR Challenge Designs; GM Helps Cities Prepare for Plug-in Hybrids

By Kevin Eber, NREL
February 9, 2009   |   17 Comments

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17 Reader Comments
Comment
1 of 17
February 11, 2009
Ok so when will the people who gave us this car (the Volt) share the plans to make a totally Solar Powered charger for my driveway? It would make it a lot easier than waiting till I purchase one and match the Array and charge controller// or set up an inverted system to use AC...I HOPE you dont hog the information and make us pay an arm and a leg for the system..
Comment
2 of 17
February 11, 2009
Hey Tim, you might wanna check these folks out...
http://www.usaeaglecarports.com/solports.html

can't help you with that arm-leg thing....
Comment
3 of 17
February 11, 2009
Electric cars have lots of problems! First, there's not enough lithium in the world to power a serious quantity of electric vehicles with lithium ion batteries - even those with only a 20-mile range (see "The Problems with Lithium"). The Volt is DOA (Dead On Arrival) with its 40-mile range and its $40K+ price tag. There's a new electric car coming from China in 2011 with a 165-mile range, and a price tag of only $21,000 (before rebates).

The real solution to the electric car problem is zinc-air batteries, which unfortunately have to be replaced rather than charges - at the present time. There's lots of zinc in the world.

But, even if you could recharge the batteries, where is all the charging energy going to come from. Real battery packs (50KW - 250 mile range) will require high-voltage chargers.
Comment
4 of 17
February 11, 2009
Could someone clear up a point for me. When they talk about lithium ion batteries, does this include lithium titanate batteries (which are, I believe, a variety of lithium ion battery). From the little I have read, the lithium titanate battery is superior in a number of respects to the conventional lithium ion battery. If so, why start with a battery that has already been made obsolete.

What is the story about manufacturing whatever battery that is used so that it is completely and easily recycled. If this is done, the problem of finding enough lithium is considerably eased.
Comment
5 of 17
February 11, 2009
Maybe we are thinking too small.

Wouldn't it make more sense to exchange battery packs at intervals, similar to the way we stop to fill up on fuel now?

That way batteries can still "evolve" and don't have to be so big.
We just standardise the space required, or battery pack physical sized (Like a "D" cell) and keep trying to pack more energy in as developments proceed.

Hopefully the infrastructure in the form of battery charging and exchange stations will grow just as the petrol supply chain did.

The only catch I can see is designing an acceptable standardised size battery pack. But several smaller packs might be better than one large one. Easier to lift too.
Comment
6 of 17
February 11, 2009
It really dismays me that GM already had a very good start platform in the EV1, but recalled them all from their leases and crushed them (some 800 I understand).
Now they have to reinvent the whole works again.

Seems dumb.

Can't help feeling their present troubles were self inflicted.
Comment
7 of 17
February 11, 2009
I get annoyed whenever I read that the Volt is an "extended-range electric vehicle (E-REV)". The claim that the Volt is a modified electric vehicle is likely to cause public confusion for no perceivable gain. It is true that the electric machine powers the wheels entirely, and the ICE has no mechanical connection to the wheels; however, this does not classify the powertrain as "electric", which surely means that all of the power is derived from electricity. One would certainly not consider a diesel gen-set to be strictly an electric power source, and the Volt should likewise not be considered to be an electric vehicle, the ambiguous "extended-range" aspect notwithstanding. The vehicle should therefore be classified as a plug-in hybrid vehicle.

Eugene, don't make the mistake that Peak Oil people have been making: as the price for lithium goes up, the mining companies will find more resources. And the Chinese company (I assume you are talking about Build Your Dreams) is a long way from meeting the U.S. safety and emission standars, so don't think that the price you gave is firm.

Steve, you should check out www.betterplace.com, a company that is looking to provide the infrastructure for battery charging and battery replacement.
Comment
8 of 17
February 11, 2009
These American car manufacturers can find their back sides in broad daylight with both hands!
Comment
9 of 17
February 14, 2009
There is no Chevy Volt-----there is only talk.

The Chevy Volt is tenatively scheduled to go into production in 2010 or later. Officials were in Washington recently telling Congressional Committe members there may not even be a GM by 2010 without a massive bail out. And there are no guarrantees that the massive bailout would even work.

In the meantime----cars that can achieve more than twice the thermal efficiency of the Volt's expensive and complicated/cumbersome hybrid technology are already running. On ethanol. And have been for years. You can see them race on Memorial Day in Indianapolis---in the Indy 500. Or in Europe in the Formula One Grand Prix. Or on any major dragstrip.

------"Eugene, don't make the mistake that Peak Oil people have been making: as the price for lithium goes up, the mining companies will find more resources."----------

Maybe, maybe not. That is called wishful thinking. If the price of lithium has to go up to be able to produce the Chevy Volt which is already expensive at a projected price of $40,000, the projected market will shrink even further as the price rises due to the price of a basic component (lithium) rising also. Nobody will be able to buy them.
Comment
10 of 17
February 15, 2009
Checking in Wikipedia about the scarcity of Lithium, it is apparently present in the earths crust at about 20ppm, equal to cobalt and greater than the following commonly known elements. Lead, Boron, Tin, Uranium, Arsenic, Bromine, Iodine, Silver and Mercury. Seems that there is a fair bit around and if we recycle from the start, it's scarcity might not be quite as bad as suggested.
Comment
11 of 17
February 15, 2009
Also from Wikipedia concerning Lithium:

"There are widespread hopes of using lithium ion batteries in electric vehicles, but one study concluded that "realistically achievable lithium carbonate production will be sufficient for only a small fraction of future PHEV and EV global market requirements", that "demand from the portable electronics sector will absorb much of the planned production increases in the next decade", and that "mass production of lithium carbonate is not environmentally sound, it will cause irreparable ecological damage to ecosystems that should be protected and that LiIon propulsion is incompatible with the notion of the 'Green Car'".
[^ a b "The Trouble With Lithium 2" (PDF). Meridian International Research. May 28, 2008. http://www.meridian-int-res.com/Projects/Lithium_Microscope.pdf. Retrieved on 2008-07-07.

Full article concerning, supply, production and safety: http://en.wikipedia.org/wiki/Lithium#Production_and_world_supply

Also from the article:

"The total amount of lithium recoverable from global reserves has been estimated at 35 million tonnes, which includes 15 million tonnes of the known global lithium reserve base"

I don't know exactly how much lithium it takes to produce a car or truck sized battery---but considering a workng world reserve of 20 million tonnes and 240+ million vehicles on the road in the US alone, breeding horses might be a better investment in long term transportation options.
Comment
12 of 17
February 25, 2009
1) Re. Scarcity of lithium: We don't have to use lithium batteries. Sure they have the highest energy density we have to offer, but there are other choices that are a whole lot cheaper and have already demonstrated their ability to drive an electric car for more than 50 miles on a single charge. Amongst these are lead/acid, nickel-metal hydride and Ni/Cd. The EV-1 of 10 years ago could do 55-95 miles on a single charge using humble lead/acid batteries. Now we have the "Volt" offering us only 40 miles using expensive Li-Ion. So much for progress. For $40,000 I would want something a whole lot better than this. The Volt must be compromised either by small battery size, too much body weight or both.

2) To Fred Linn: I must correct you again on Formula 1 fuel. Formula 1 engines do not burn ethanol and never have. From the FAI Rulebook:

" FAI Regulations: 19.1.1 The purpose of this Article is to ensure that the fuel used in Formula One is petrol as this term is generally understood."

You have to remember that F1 cars, unlike IRL, race in all parts of the world and so have always been restricted to readily available "pump fuel." Small quantities of additives are allowed, but the fuel is essentially commercial grade petrol (gasoline). Even during the great days of turbocharged 1.5L engines (1977-88), where 1,500 bhp was achieved for short bursts, the fuel was still gasoline.
Comment
13 of 17
February 25, 2009
To Jeff Wishart: "The vehicle should therefore be classified as a plug-in hybrid vehicle."

I disagree with your premise that the term PHEV should be used for the Volt. The only term that conveys what it is, is the correct term "Series Hybrid." In other words you use 1 fuel till it's exhausted and then switch to another. The Prius-type hybrid (whether you can recharge the battery from an external source or not), is a "Parallel Hybrid." I can only suggest the following categories:

- All electric vehicle
- Series Hybrid (which by definition must be plugged in to recharge)
- Parallel Hybrid (non-rechargeable)
- Parallel Hybrid (rechargeable)

I expect the public and media people will be confused by this for years, but they'll get the idea in the end. Admittedly a vehicle powered by rubber bands with turbojet back-up is also a "Series Hybrid," but the above should be adequate for now.
Comment
14 of 17
February 25, 2009
Geoffrey Gunning: I think you are confused as to the meanings of series and parallel hybrids. Neither confirm nor refute whether the vehicle is capable of accepting off-board electric energy. A series hybrid is simply a powertrain configuration wherein the electric motor takes care of all of the direct, mechanical propulsion power, and the ICE is connected to a generator that sends the electric energy either to the electric motor or the energy storage system (ESS), or to both. The size of the ESS is not specified: it can be either large enough so that the vehicle can have an all-electric range (AER) (so the vehicle can be classified as a PHV, i.e. the Volt) or no AER (so it would not be classified as a PHV). This last point applies to parallel hybrids as well. I am a little confused as to why you think that series hybrids must "by definition" be plugged in to re-charge. The ICE is capable of charging the batteries while the vehicle is in operation, so your "definition" is certainly incorrect.

You have also omitted what is arguably the most important type of hybrid configuration: the power-split hybrid. In this configuration, the power from the ICE is "split" between mechanical and electrical paths in order to achieve higher efficiency. The Prius happens to have this type of hybrid powertrain: it is most definitely NOT a parallel hybrid.

Here is the SAE definition for PHVs:

"A hybrid vehicle with the ability to store and use off-board electrical energy in the RESS (rechargeable energy storage system)."

Now I am not happy with this definition, and am currently writing a journal article proposing an improved one, but it should show you that a PHV is any hybrid that has the capability to store off-board electrical energy.

So I stand by my story: the Volt is a PHV, not some new name invented by GM that will confuse more than clarify the issue.
Comment
15 of 17
February 26, 2009
I should clarify that I don't disagree that the Volt is a series hybrid vehicle. It's both a series hybrid and a plug-in hybrid. The former specifies the powertrain configuration while the latter describes whether the ESS can be charged using off-board electricity.

So...the Volt is a plug-in series hybrid vehicle.
Comment
16 of 17
February 26, 2009
To Jeff Wishart: I bow to your superior knowledge. I find there are more types of hybridisation than I thought - even parallel hybrids can be split into various different configuations. What I find unsatisfactory is that the term PHEV is applied to vehicles like the Volt and the Prius, even though they work quite differently. It's almost trivial to say "plug in," since any battery can be recharged from an external source very simply. I always wondered why the previous Prius was not rechargeable and why Toyota took so long to come up with a rechargeable version. Am I overlooking something?.
Comment
17 of 17
March 4, 2009
Geoffrey Gunning: It's true that there are many types of hybrids. But be careful: the Prius isn't actually a PHV (I prefer to omit the 'E' part of the acronym since the 'plug-in' part means that it is electric by definition), it can only (currently) be retrofitted to become a PHV. The Prius is just an HV otherwise. Also, it's not always trivial to charge a battery--you often need a specialized charger and have designed the battery pack to be accessible. Toyota initially marketed the Prius as an electric vehicle that you don't actually have to plug in, since the marketing geniuses told them that this was one of the sticking points to EV introduction.

The reason why Toyota has taken so long is that battery technology is just not quite at the point where PHVs make economic sense. This is why GM is putting so much time/effort (let's hope they are still around to reap the benefits of this investment!) into developing batteries for the Volt: they need performance and cost improvements. Batteries are expensive, so adding lots of batteries makes the entire vehicle expensive.

I expect battery and fuel cell (and ultracap) costs to come down so that most cars will be either EVs or FC-B-UC-HVs. If you can afford multiple cars, you will buy an EV for your city driving. If you can only afford one car and you like going on road trips (and/or like towing stuff), you would buy the fuel cell-battery-ultracapacitor HV. Keeping my fingers crossed (and my mind open to the possibility that I may be proven wrong some day)...
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