Showing posts with label PHEV. Show all posts
Showing posts with label PHEV. Show all posts

Thursday, January 13, 2011

Volt Car FTW

Moving transportation off of crude oil is vital; pick your reason: energy prices, national security, war, military spending, pollution, environmental devastation, CO2... Whether your political views run left or right, down the middle or indifferent, there are reasons to support moving off of gasoline. Tea Party members can support the reduction in this massively government subsidized energy source. Tree Huggers can support the cleaner air. The indifferent can enjoy the decline (or at least slower rise) in gasoline prices as demand is decreased and competition is increased.

Toward the goal of moving away from oil, the Chevrolet Volt is an important car for America for two primary reasons. First, it allows electricity to be the primary fuel without any of the concerns that many people have about pure electric vehicles. The Volt is a plug-in hybrid* that can be "fueled" by electricity or gasoline. If the car has been plugged in, then the Volt uses its battery power for the first 25 to 50 miles (usually about 35 miles) of travel. If you need to drive more and don't want to stop to plug in then the Volt has a gas tank and an on-board gasoline generator that can move you another 340 miles down the road. At that point it operates like any gas car in that you can fill up at any gasoline station and keep on driving. The next time you plug in the car, it goes back to using cheaper, cleaner electricity. It is the best of both worlds.

According to the U.S. Department of Transportation most Americans drive less than 30 miles each day. This means that with the Volt, most days will be completely gasoline free. Electricity will be used for commuting and all the in-town short trips, while gasoline will be there when you need it for a road trip to Vegas. If you are unsure of, or cannot use a full-electric car, then a plug-in hybrid with an electric range to cover "most days" is a great way to move the majority of your driving to electrical power and still have the safety net of all those quick-fill gas stations.

The second reason that the Volt is important, specifically to America, is that it is made by an American Company that has a loyal following. If a new technology like this had been introduced by a foreign car company, there are some people that would never consider it and even disparage it. The Volt has taken a couple of knocks from Rush Limbaugh, but Chevy diehards will ignore this completely. As their ads say "Chevy Runs Deep".

Americans know that General Motors is here to stay. As the recent US government bailout and resurrection IPO proved, GM is not going away. They will be here to honor their warranties and service their vehicles. Additionally, potential US customers know that the vehicles are being assembled in an American factory and that their payments are, at least in part, going in to the pockets of American workers.

The Volt reaches out to an audience that has never been interested in a car like the Prius. For example, when NASCAR's Rick Hendrick bought the first publicly available Volt in a charity auction, an entire segment of America was introduced to this car technology as something really cool. Yes, it is different technology than the Chevy that their Dad drove, but it comes from that same company and carries the same bow-tie logo that they trust.

The Volt will be the first opportunity for many people to experience an electric motor bigger than a golf cart. In a Volt you can feel the high-torque electric motor acceleration. The Volt will be the first chance for many to have the "EV Grin." In short, it is fun to drive. Plus it has a lower fuel bill and a quieter ride.

The Volt will also give people a choice of how they fuel their driving. They can plug in, filling up on locally generated electrons, putting money into their local economy. Or they can pump up, knowing that most of that money is going out of the country and some of it is going to regimes that don't like our freedoms or way of life. The point is the Volt gives them a choice.

Conclusions
The Volt is an eloquent machine that Americans can be proud of. When plugged in nightly, the Volt is fueled with enough locally generated electrons for most people's daily driving to be "energy independent." Because the Volt can be run on gasoline too, there is no need to be concerned about range limitations or charging times. Many people that would have ignored "yet-another-foreign-hybrid" will give a Chevy a chance.

References
Volt Specifications
Rick Hendrick Buys a Volt

Rick Hendrick fields 4 Sprint Cup teams:
  • Five time consecutive Sprint Cup Champion in the Lowe's #48 Chevrolet Impala SS driven by Jimmie Johnson.
  • Four Time Sprint Cup champion #24 Jeff Gordon
  • #5 Chevrolet driven by Mark Martin
  • and #88 driven by NASCAR’s most popular driver Dale Earnhardt Jr.



* Call it a range extended electric vehicle (REEV) if you'd like.

Thursday, November 25, 2010

You Don't Know EVs


Mass market electric vehicles (EVs) are coming soon to a dealership near you*. The Nissan LEAF and Chevy Volt are both scheduled to begin delivery in early 2011. These vehicles are very different from the gasoline powered cars that most of us are used to driving. EVs are new to the mass market and people are asking questions. These questions, however, often come from their gasoline driving experience. For example, when I am showing my EV to the public the typical questions are:

  • How far can it go on a charge?
  • How long does it take to recharge from empty?
  • How fast is it? (top speed & 0-60MPH)
These seem like important things to know about a car, and they are; however, most people are asking them without really understanding the question. I'll explain. If you are willing to take a step back, and look at personal transportation from a fresh perspective, EVs are a whole new opportunity.

"How far can it go on a charge?"
When people ask this, what they often really want to know is, "Will this go far enough for my needs?". Most people don't know how far they drive on a typical day. The numbers that most people know are: one, how many miles they get on a tank in their current vehicle and, two, how far it is for that long annual trip they take. Neither of these numbers apply to a commuter EV, yet the EV range value will be compared to them. When they hear that an EV can travel 100 miles or 120 miles, this is compared to the 300 plus miles that they get per tank or the 580 miles to grandma's they drive every other year. This makes the 100 mile EV range sound far too small and EVs are dismissed as unusable or "not yet ready". They don't realize that 80% of people drive less than 40 miles per day.

Less than 40 miles per day for most people means that a 100 mile range is more than 2.5 times the distance that most people need on most days. And unlike a gas car, EVs can be conveniently charged overnight in your own garage and start out each day fully topped up.

Viewed another way, how often are you filling up that gas tank? If a tank carries you 350 miles, and you are filling it up once per week, that is an average of 50 miles per day; well within the capabilities of modern EVs.

If you want to quickly map your driving, try the Nissan 100 mile drive test. Plug in your own locations for a busy day. Try home to work, to the gym, errands, dinner, and back home. Or try home, school, shopping, pick up kids, soccer, dance, then back home. Can you do these with miles to spare? For most people the answer is 'Yes'. This means an EV can fit most people's lifestyle well. If your answer was 'No', read on, option #5 below might work for you.

What to do about that annual long trip? There are several options.
  1. Keep a gas 2nd car around. Use your EV whenever you can and the gas car when the EV won't work. See Hybrid Driving without a hybrid car. If you drive the gasser less than 5k miles per year, you may be able to put it on recreational insurance rates.
  2. Borrow a gasser. Swap cars with a friend for a week. They get to try out an EV and you can take your trip.
  3. Rent a car. The annual savings you get from not buying gas will allow you to rent a nice vehicle for an extended period of time and still come out ahead.
  4. Ride Share. Programs such as Zip Car have been expanding. If there is one in your area, this can complement EV ownership well. Just log-on, find a car parked near you, reserve it with a click and it is yours when you need it.
  5. Buy a PHEV: Rather than buying a pure EV, buy a plug-in hybrid like the Chevy Volt, the 2012 Prius PHEV, or the Fisker Karma. You don't get all the benefits of a pure EV, but you can utilize a gas station when needed.
The new perspective on range is how far per day, not how far between fill ups. On to the next question.

How long does it take to recharge from empty?
No one wants to be stuck for hours waiting for their car to charge before they can go someplace. Vehicles represent our freedom. When you drive an EV, you can be less restricted, not more.

Going to the gas station is inconvenient, so we tend to put it off until it cannot be avoided. Therefore a gas car is usually being filled up from empty. Don't assume the same with an EV, in fact, the opposite is usually true. For an EV, the charging station is right there, in your garage, the one that you are already driving to when you go home. It is not a side trip that you have to make to fill up. This means that you can plug in each day, even if you only drove a few miles.

Until you stop going to gas stations, you may not realize what an inconvenience they really are. Compare this to your cell phone. You plug in your phone overnight and it is fully charged, ready for all your needs the next day. That is convenient. By contrast, what if you were not allowed to plug in your phone? Instead, you had to take it to a "phone station" each week for a "fill up". This would be intolerable, yet it is OK for our cars because most people don't know of any other way.

Continuing with the cell phone analogy, do you know how long it takes your cell phone to charge up? Probably not, it depends on how much you have used it that day, and most likely you don't really care because an overnight charge is more than enough. The only time you pay attention is the few seconds it takes to drop the phone into the cradle and then to grab it the next morning.

It is the same with an EV, your attended time is just the few seconds to plug it in each evening and unplug it each morning. The charge duration is completed while you sleep. Most days the battery pack is more than half full at the end of the day, so charging to full has a head start. Public charging infrastructure is nice to have, but it is not required for EVs to be usable.

The new perspective for charge time is not how long does it take, but how much of my time does it take. EVs take far less of your time.

What if I am stranded with a drained battery, how long will that take?
Modern EVs such as the LEAF will show you on the nav system how far you can go. If your destination is not within the circle, you cannot get there without stopping to charge. When you do stop to charge, no one said that you must charge up all the way. If you are plugged into a standard 120V outlet this will give you about 7 miles of addition range per hour. A Level 2 outlet that you'll find at EV charging stations will give about 16 miles of additional range each hour you are plugged in. So a stop for lunch or dinner can give you the extra miles you need to get home or your stop for the night.

Tom Saxton is a Seattle area Tesla Roadster owner. He has blogged about driving his roadster down Highway 101. He stayed at the coast, charged overnight, drove into Portland to meet up with NEDRA, raced his Roadster, charged between races, and then headed back home. He was able to make the entire trip without ever waiting for the car to charge. Charging was always something that he could do in the background while he was sleeping or waiting for his next turn on the line. Granted the Roadster is out of most people's price range, but you can do the same thing in a LEAF on a smaller scale.

The new perspective on charge time is the charging rate in miles per hour, not hours till full.

How fast is it? (top speed & 0-60MPH)
I think most people that ask this question are wondering "Is this a golf cart or a real car?". There have been many low speed EVs and glorified golf carts that have been pitched as the solution to transportation. Skepticism here is well deserved. Low speed EVs have niches that they can serve very well such as retirement communities or commutes that can be done exclusively on residential roadways. However, when they are sold outside of these niches they fail to meet the needs and give all EVs a bad name.

Perhaps in part because of the "golf cart" experience, many people assume there are things that an electric motor is just not suited to do. In fact, other than burn gas directly, electric motors can do everything and more that internal combustion engines are used for today. Such as, the little white car shown in the picture to the right. It is an electric car that can run the quarter mile in 10.4 seconds. That is supercar territory. And it was done as a DIY project with a Datsun and two forklift motors.

What about big loads? Surely electric motors cannot handle hauling. Think again. Diesel-electric trains have moved big loads for years. The diesel is only used to generate electricity. It is the electric motors that do all the work of moving the load. The same is true for many types of giant hauler trucks like the one shown to the right. Large mining machines, NASA's huge Crawler-Transporters, some submarines and ships also use electric motors.

Assuming all electric motors are weak based on riding in a golf cart is like seeing a moped and assuming that a Dodge Viper is not possible.

Performance, hauling, & range are all possible if you are willing to pay for them. In the '90s, Ford and Chevy both made electric trucks. Ford, NaviStar and others have new generations of EV trucks planned.

The new perspective: EVs can be whatever we design them to be.


Conclusions
To truly understand if an EV would work for you, it should be compared to your needs, rather than to the gasoline car that you drive today. This means that you have to understand your current driving habits. How far do you drive in a day? Try resetting your trip meter each morning this week to see. How many hours does your car sit parked each day? If an EV was plugged in for just those hours, would it get enough range for your current driving needs?

EVs are a new tool for your transportation needs. They do not work in all cases, but they can work for many people and coupled with a 2nd car or a range extender, a large percentage of your driving can move off of gasoline.

Tuesday, December 15, 2009

Plug-in Hybrid Types Compared


One year from today, you should be able to walk on to the lot and buy a Chevy Volt or a Nissan Leaf or one of many other cars that have a plug. There is a lot of confusion about the new world of plug-in cars.

In this Green Car Reports article, the author attempts to clear things up by saying that the Chevy Volt is not a hybrid. He is wrong; it is a hybrid, just not the same type that have been in the market. In the comments, he is corrected and admits that he was trying to simplify things by avoiding "technically accurate esoteric" terms that "the general car-buying public" would not understand.

If you are reading this, I am going to assume you are smart and can handle technically accurate and esoteric.

First, there are a lot of different ways to propel a vehicle including flywheels, fuel cells, compressed air and many many more. This discussion will only focus on internal combustion and battery electric (and the combinations thereof) because these are the car types that are planned to be on the mass market in 2011.

When examining vehicles, we'll look at two things:
  • The Fuel(s): the external energy inputs to the vehicle.
  • The Drivetrain: the engine and/or motors that propel the vehicle.
Fuel(s)
Drivetrain(s)
Name or Example

Gas

Gas
good ol' internal combustion (ICE)
Gas
Electric
Gas
HEV - Toyota Prius

Hybrids

Electric
Gas
Electric
Gas
Plug-in Hybrid Electric Vehicle* (PHEV)
Electric
Gas
Electric

EREV - Chevy Volt
Electric

Electric

Battery Electric Vehicle - Nissan Leaf

Line 1 ICE - Gas fuel powers the drivetrain: this is simply the internal combustion vehicle that dominates our roadways today. No explanation needed.

Line 2 HEV - Fuel = Gas, Drivetrain = Both: This is the Hybrid Gas-Electric Vehicle. The "gas" portion of that description is usually just assumed, leaving it label HEV. These came to the US with the Honda Insight and the Toyota Prius in 2000. At the time this writing, HEVs are still less than 3% of new vehicle sales, but you surely have seen one by now. These vehicles are parallel-series hybrids meaning that the power from the gasoline engine can be directed to either drive the wheels or to run the generator to charge the batteries. Even though this vehicle has batteries, the initial source of all of the energy comes from the gasoline put in the tank. Electricity is generated from regenerative braking and running the engine as a generator.

The two above are mass produced cars that are on the road today. The rest of the list is rare and generally less understood.

Line 3 PHEV: this is the plug-in version of the HEV. To make a point the complete name would be plug-in parallel-series gas-electric hybrid vehicle (PPSGEHV). You are not likely to see that lengthy description used anywhere else, so just stick to PHEV. The simplest way to explain a PHEV is start with an HEV and add more battery capacity and a charger to charger them.

Line 4 EREV: is the Plug-in series hybrid. It is also where the Chevy Volt sits. GM has branded this category the Extended Range Electric vehicle (EREV) and their internal technology as "Voltec". Chrysler refers to this category as Range Extended Electric Vehicle (REEV). This category has only an electric drivetrain. All propulsion is provided by an electric motor. The batteries provide power for an initial range and then a gasoline (or diesel or ethanol) generator provides the electricity for operation. The generator runs at an optimal speed that is independent of the vehicle's demands. Any surplus energy that the generator creates is sent to the batteries.

Although the generator does provide energy to the batteries, it does not charge them up completely. Doing so would use gasoline and reduce the MPG of the vehicle. That defeats the purpose. So, if the batteries become replenished due to the generator and regenerative breaking to a threshold above "customer empty", then operation returns back to battery powered mode. The generator and fuel act as a safety net range extender, not as a complete battery charging system.

These transitions of the generator turning off and on will not be readily noticeable to drivers or passengers. If you have driven an HEV like the Toyota Prius, then you know the engine turns on and off often based on driving speed. The transitions of the EREV generator will be related to the battery charge level, rather than the vehicle speed.

Line 5 BEV: This last line is the battery electric vehicle (BEV). These vehicles are not a hybrid. They are fueled by electricity and propelled by an electric motor. This category includes Tesla's Roadster and Model S and the Nissan Leaf. The vehicles have a fixed range and must be plugged in when the batteries are depleted.

Categories
The vehicles can be categorized in many ways:

Internal Combustion: ICE
Hybrids: HEV, PHEV, & EREV
Plug-in: PHEV, EREV & BEV

Plug-in Vehicles: The last 3 rows include "electric" as a fuel type. Put simply, these are cars with plugs. This is a useful categorization for discussing the electrification of personal transportation. Depending on the design of the PHEV or EREV, they can use electricity for just the few miles, up to most of a days driving. And BEVs are completely propelled by electricity. What all the Plug-in vehicles have in common is that they use grid electricity to displace liquid fuels.

The Plug-in Vehicle category includes Plug-in hybrids such as the BYD F6DM and Hymotion modified Priuses. And it includes EREVs like the Chevy Volt and the (now cancelled) Chrysler ENVI line.

There you have it. If the vehicle uses more than one fuel type OR has more than one propulsion engine type, it is a hybrid. That is a simple definition; the complexity is in all the ways that these can be combined.

Tuesday, February 10, 2009

Plug into the Coming Electric Vehicle Revolution

Although gas prices have fallen dramatically since last summer, many automakers are still moving ahead with plans to introduce plug-in vehicles. As Wired put it in a review of the 2009 Detroit auto show "The future of the automobile was sealed at North America's biggest auto show, where all of the hottest new cars and concepts had extension cords."


Coming Soon?
The showroom floor is not the same as the dealership floor. They are not here yet. Will they make it this time? Henry Ford was fascinated with electric cars and collaborated with his close friend Thomas Edison on an ultimately unsuccessful plan to bring one to mass market. If you change the names above, that could be the story of many EV start-ups or even the major car company's today. They have dreams of bringing a practical, affordable, electrically powered, mass produced car to market.

So why is this time different? There are advances both technologically and politically. At the bottom of this post there are dozens of links to stories of auto makers' plug-in plans and municipalities installing plug-in infrastructure.

Electron Tipping Point
This time it looks like there is momentum that will not be quiesced by cheap gasoline. As Andy Grove, of Intel fame, put it "the drumbeat of electric transportation ...is like nothing I've ever seen in my life. It must be done. Everything else is secondary". Electron fueled transportation is domestic, cleaner, (and still) cheaper. This time it is over the tipping point. The links below tell of cities, states, and even entire countries deploying infrastructure for plug-in transportation. None of the auto companies want to miss out on this industry's 'inflection point'.

The big guys have to play in this new space to protect their position and the little guys are hoping that an early to market solution can help them move up in the rankings. No one can afford to ignore what might be the next big car market. 

Hydrogen War Over
It may not be over for good, but there is at least a 5 year truce. Politically, the hydrogen fuel cell vehicle has been used to defer the battery electric car. Only now are the automakers realizing that fuel cell cars are at least another decade away and they have been "a decade away" since the 1960's. No longer can automakers wait. The Toyota Prius has shown what is possible and every automaker wants to be the next one to have a big hit car. They can no longer wait for hydrogen. Even Iceland, where they were trying to build the "hydrogen economy" is looking for plug-in cars. They have a hydrogen infrastructure but the cars are currently just too expensive.  Tesla Roadsters are bashed for being expensive, well for the true cost of a hydrogen fuel cell car, you can buy 9 or 10 Roadsters. Fuel cells will get cheaper, call me back in about a decade. This political fight is over for now. Hydrogen has lost. 


Electric Car V3.0
Electric cars are not new, in the early 1900's most cars on the road were electric. Ford's wife even drove one. Then in the late 1990's, thanks to California's zero emission mandate, EVs made a brief comeback. See Who Killed the Electric Car? to find out how that ended. 

Technologically, several things have improved for plug-in cars since the GM EV1; batteries are lighter and cheaper, carbon fiber materials... However, the one thing that I think is the most important change since the 1990s is the range extender. If you have never driven an EV, to hear that it has a 50, 60, or even 90, or 100 mile range, sounds short. Most people drive less than 40 miles per day, but if you tell them that is ALL they could drive, well, they don't like it. We Americans love freedom and the ability to jump in your car and drive off to anywhere is a strong representation of that freedom. The extended range EV (E-REV or REEV) gives you this freedom, while having an electric range that meets most days driving needs.

E-REV now, EV later
For Joe (or Jane) American, after owning an E-REV it will become obvious how infrequently you need more range, then if it fits your driving needs, your next car could be a pure EV. Then for those few times you do need more range you can rent or borrow an E-REV car or have a "gasser" in your family fleet that you only use when you must. Battery technology continues to improve 6-8% per year. That is 6-8% more range, or cheaper per year. You will be able to buy a significant range EV at a reasonable price within a decade. E-REVs bridge the gap as affordable EV solutions can be developed and charging infrastructure can be rolled out. 

Driving an E-REV will change the way you look at fueling up at the pump. Say you forgot to plug-in, so now you have to stop for gas. You'll have to pay at the pump; all the time thinking "why didn't I plug it in? I could be driving now instead of sitting here and I could have paid one fourth the price." The best way to get better habits is by reward and punishment. Plugging in rewards you with the "EV grin" and filling up at the pump punishes your time and wallet.

E-REVs are a natural progression. It is going to take time to build up a charging network and to develop fast charging technology. We have a network of fueling stations now. E-REVs allow us to take advantage of it. Even if only for the peace of mind in knowing that you can pull-in and fuel up if your batteries drain.

Renewable Electron Economy
Don't get me wrong, to all my EV driving buddies out there, you are ahead of the curve. Eventually maybe people will come to see the "freedom" of gasoline as an illusion. Dependency on foreign oil is a ball and chain. We are borrowing money from China and sending it to the middle east. Let's kick off the renewable electron economy and move to a hometown powered, no war required, smart grid, EV transportation system that creates green collar jobs.

Enjoy the links below, here are a few of the more interesting quotes: 

“Investment banker Morgan Stanley forecasts 5,000 plug-in cars will be on the road in 2010, 30,000 in 2011 and 100,000 by 2012. Lowenthal describes those projections as conservative.”

“The company’s ambitious “low carbon” agenda calls for cranking out one million hybrids a year within the first half of the next decade and accelerating the development of small electric vehicles for mass production…”

“Our view is that oil production will peak in the near future. We need to develop power trains for alternative energy sources...”

"President Obama said he would like to see 1 million electric and plug-in cars on America's highways by 2015."

Links Galore
Industry
  Will Electric Vehicles Be the Next 'It' Cars?
Auto Companies
  Lotus
  Nissan
Locations
  Berlin
  Canada
  Hawaii
  Israel
  Oregon
  Texas