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===Acceleration performance===
===Acceleration performance===
[[Image:VenturiFetish.jpg|thumb|right|300px|[[Venturi Fetish]] - a limited production electric car capable of reaching 0-100km/h in 4.5 seconds]]
[[Image:VenturiFetish.jpg||right|[[Venturi Fetish]] - a limited production electric car capable of reaching 0-100km/h in 4.5 seconds]]


Many of today's electric vehicles are capable of acceleration performance which exceeds that of conventional gasoline powered vehicles. Electric vehicles can utilize a direct motor to wheel configuration which increases the power deliverability to the wheels. Having multiple motors connected directly to the wheels allows for each of the wheels to be used for both propulsion and as braking systems, thereby increasing traction. In some cases, the motor can be housed directly in the wheel, such as in the [[Whispering Wheel]] design, which lowers the center of gravity and reduces the number of moving parts. When not fitted with an axle, differential or transmission, many electric vehicles have greater torque availability, which goes directly to accelerating the wheels. A gearless or single gear design in some electric vehicles eliminates the need for gear shifting, giving the newer electric vehicles both smoother acceleration and braking. This also allows higher torque at wide&nbsp;rpm levels. For example, the [[Venturi Fetish]] delivers [[supercar]] acceleration despite having a relatively modest 300 horsepower. Its top speed is only around 100 mph, however. Some electric vehicles, such as some DC motor-equipped drag racers, have simple two-speed transmissions to improve top speed. <ref>Hedlund, R. (2006) "The 100 Mile Per Hour Club" ''National Electric Drag Racing Association'' [http://nedra.com/100mph_club.html list at nedra.com] accessed 5 July 2006</ref> <ref>Hedlund, R. (2006) "The 125 Mile Per Hour Club" ''National Electric Drag Racing Association'' [http://nedra.com/125mph_club.html list at nedra.com] accessed 5 July 2006</ref> Larger vehicles, such as electric trains and land speed record vehicles, overcome this speed barrier by dramatically increasing the wattage of their power system.
Many of today's are capable of acceleration performance which exceeds that of conventional gasoline powered vehicles. Electric vehicles can utilize a direct motortowheel configuration which increases the . Having multiple motors connected directly to the wheels allows for each of the wheels to be used for both propulsion and as braking systems, thereby increasing traction. In some cases, the motor can be housed directly in the wheel, such as in the [[Whispering Wheel]] design, which lowers the center of gravity and reduces the number of moving parts. When not fitted with an axle, differential or transmission, electric vehicles have greater torque availability, directly accelerating the wheels. A gearless or single gear design in some eliminates the need for gear shifting, giving the vehicles both smoother acceleration and braking allows higher torque at wide . For example, the [[Venturi Fetish]] delivers [[supercar]] acceleration despite a relatively modest 300horsepower top speed only around 100mph. Some DC motor-equipped drag , have simple two-speed transmissions to improve top speed. <ref>Hedlund, R. (2006) "The 100 Mile Per Hour Club" ''National Electric Drag Racing Association'' [http://nedra.com/100mph_club.html list at nedra.com] accessed 5 July 2006</ref> <ref>Hedlund, R. (2006) "The 125 Mile Per Hour Club" ''National Electric Drag Racing Association'' [http://nedra.com/125mph_club.html list at nedra.com] accessed 5 July 2006</ref> Larger vehicles, such as electric trains and land speed record vehicles, overcome this speed barrier by dramatically increasing the of their power system.


==Batteries==
==Batteries==

Revision as of 23:46, 18 July 2006

File:Rav4evdrawing.jpg
The Toyota RAV4 EV is powered by twenty-four 12 volt batteries, with an operational cost equivalent of over 165 miles per gallon.

A battery electric vehicle (BEV) is an electric vehicle storing chemical energy in rechargeable battery packs to power one or more electrical motors.

BEVs were among the earliest automobiles, and are more energy efficient than common internal combustion engine (ICE) vehicles. In urban traffic, due to their beneficial effect on environment, electric vehicles are an important factor for improvement of traffic and more particularly for a healthier living environment. They produce no pollution while being driven, and almost none at all if charged from most forms of renewable energy. Many are capable of acceleration performance exceeding that of conventional gasoline powered vehicles. New models can travel hundreds of miles on a charge, even after 100,000 miles of battery use. BEVs reduce dependence on oil, mitigate global warming, are quieter than internal combustion vehicles, and do not produce noxious fumes. While limited travel distance between battery recharging, charging time, and battery lifetime have been drawbacks, new battery and charging technologies have substantially improved in these areas.

Some models are still in limited production, but the most popular BEVs have been withdrawn and most of those have been destroyed by their manufacturers. A handful of future production models have been announced, although many more have been prototyped. In the US, the major domestic automobile manufacturers have been accused of deliberately sabotaging their electric vehicle efforts.

History

File:Detroit Eletric ad.jpg
1912 Detroit Electric advertisement

BEVs were among the earliest automobiles. Between 1832 and 1839 (the exact year is uncertain), Robert Anderson of Scotland invented the first crude electric carriage. A small-scale electric car was designed by Professor Stratingh of Groningen, Holland, and built by his assistant Christopher Becker in 1835. Frenchmen Gaston Plante, in 1865, and Camille Faure in 1881 improved the storage battery, paving the way for electric vehicles to flourish. France and Great Britain were the first nations to support their widespread development. [1]

Before the preeminence of powerful but polluting internal combustion engines, electric automobiles held many speed and distance records around the turn of the century. Most notable was perhaps breaking of the 100 km/h speed barrier, by Camille Jenatzy on April 29, 1899 in his rocket-like EV named La Jamais Contente. It reached a top speed of 105.88 km/h (65.79 mph)

BEVs were produced by Anthony Electric, Baker Electric, Detroit Electric, and others during the first part of the 20th century and, for a time, out-sold gasoline-powered vehicles. Due to technological limitations and the lack of transistor-based electric technology, the top speed of these early production electric vehicles was limited to approximately 20 miles per hour. They were successfully sold as town cars to upper class customers and often marketed as suitable vehicles for women drivers due to their cleanliness, lack of noise and ease of operation.

File:Ed d22m.jpg
Thomas Edison and an electric car, 1913 (courtesy of the National Museum of American History)

Introduction of the electric starter by Cadillac in 1913, which simplified the difficult and sometimes dangerous task of starting the internal combustion engine, contributed to the downfall of the electric vehicle. As did radiators, in use as early as 1895 by Panhard-Levassor in their Systeme Panhard design,[2] which allowed engines to keep cool enough to run for more than a few minutes, before which they had to stop and cool down at horse troughs along with the steamers to replenish their water supply. EV's may have fallen out of favor because of the mass produced Ford Model-T which went into production four years earlier in 1908. [3] Ultimately, technological advances in internal-combustion powered cars advanced beyond that of their electric powered competitors, resulting in the superior performance and practicality of gasoline powered cars. By the late 1930s the early electric automobile industry had completely disappeared, with battery-electric traction being limited to niche application such as industrial vehicles.

The 1947 invention of the point-contact transistor marked the beginning of a new era for BEV technology. Within a decade, Henney Coachworks had joined forces with National Union Electric Company, the makers of Exide batteries, to produce the first modern electric car based on transistor technology. The Henney Kilowatt was produced in 36 volt and 72 volt configurations. The 72 volt models had a top speed approaching 60 miles per hour (96 km/h) and could travel nearly 60 miles on a charge. Despite the improved practicality of the Henney Kilowatt over previous electric cars, they were too expensive and production was ended by 1961. Even though the Henney Kilowatt never reached mass production volume, their transistor-based electric technology paved the way for modern EVs.

Incentives and quotas in the United States

Since the late 1980s, electric vehicles have been promoted in the US through the use of tax credits. BEVs are the most common form of what is defined by the California Air Resources Board (CARB) as zero emission vehicle (ZEV) passenger automobiles, because they produce no emissions while being driven. The CARB had set a minimum quota for the use of ZEVs, but it was withdrawn after complaints by auto manufacturers that it was economically unfeasible due to a lack of consumer demand. Many believe this complaint to be unwarranted because there were thousands waiting to purchase or lease electric cars. Companies such as General Motors, Ford, and Chrysler refused to meet the demand despite their production capability. US electric car leases in the 1990s were at reduced costs, and so whether high enough volumes to avoid financial loss could have been obtained is unknown.

The California program was designed by the CARB to reduce air pollution and not specifically to promote electric vehicles. So the zero emissions requirement in California was replaced by a combined requirement of a very small number of ZEVs to promote research and development, and a much larger number of partial zero-emissions vehicles (PZEVs), an administrative designation for an super ultra low emissions vehicle (SULEV), which emit about ten percent of the polution of ordinary low emissions vehicles and are also certified for zero evaporative emissions.

Outside the US

File:DynastyEVSedan.jpg
The Canadian Dynasty EV 4 door sedan neighborhood electric vehicle
Electric vans of the ELCIDIS goods distribution service in La Rochelle, France
France

France has known a large development of battery-electric vehicles in the 1990s, with the most successful vehicle being the electric Peugeot Partner/Citroën Berlingo, of which several thousand have been built, mostly for fleet use in municipalities or by Electricité de France.

Norway

In Norway, zero-emission vehicles are tax-exempt and are also allowed to use the bus lane.

Switzerland

In Switzerland, battery-electric vehicles have some popularity with private users. There is a national network of publicly accessible charging points, called Park & Charge, which also covers part of Germany and Austria.

United Kingdom

In London, electrically powered vehicles have been exempted from the congestion charge. In most cities of the United Kingdom low speed electric milk floats (milk trucks) are used for the home delivery of fresh milk.

Selected production vehicles

Some popular battery electric vehicles sold or leased to fleets include (in chronological order):

Name Comments Production years Number produced Cost
Henney Kilowatt The first modern (transistor-based) electric car, capable of highway speeds of up to 60mph and outfitted with modern hydraulic brakes. 1958-1960 <100
General Motors EV1 For lease only, all recovered and most destroyed 1996-2003 >1000 ~ US $40K without subsidies
TWIKE Three-wheeled EV with pedal assist option. Produced in Germany. 1996+ >750 ~ US $16K [1]
Chrysler EPIC minivan Second generation of the Chrysler TEVan, using 324 V of lead-acid batteries in '97 and 336 V NiMH from '98 on [2]; 80 MPH top speed, range 70-90 miles [3] 1997-2000 <351 [4] leased to government and utility fleets only
Honda EV Plus First BEV from a major automaker without lead acid batteries. 80–110 mile range (130–180 km); 80+ mph (130 km/h) top speed; 24 twelve volt NiMH batteries 1997-1999 ~300 US $455/month for 36 mo. lease, or $53,000 without subsidies
Toyota RAV4 EV Rare, some leased and sold on U.S. East and west coast, supported. Toyota agreed to stop crushing. 1997-2002 1249 US $40K without subsidies
Chevrolet S10 EV S-10 with EV1 powertrain, 45 sold to private owners and survived; some sold to fleets, available on secondary market as refurbished vehicles. 1998 100
Citroën Berlingo Electrique 65+ MPH top speed, 40-60 mile range; [5] 27 cadmium-nickel 6 V, 100 Ah batteries [6] in three packs. Very similar to the Peugeot Partner which has also been offered as a BEV. 1998-2005
Ford Ranger EV Some sold, most leased; almost all recovered and most destroyed. Ford has announced reconditioning and sale of a limited quantity to former leaseholders by lottery. 1998-2002 1500, perhaps 200 surviving ~ US $50K subsidized down to $20K
Nissan Altra EV Mid-sized station wagon designed from the ground up as the first BEV to use Li-ion batteries; 75+ MPH top speed [7], 120 mile range, 100,000+ mile battery lifetime [8] 1998-2000 ~133 US $470/month lease only
Think Nordic TH!NK City Two seat, 85 km (52 mile) range, 90 km/h (56 MPH) top speed [9], Nickel-cadmium batteries 1999-2002 1005
REVA India-built city car (40 mph top speed,) now also sold in England as the "G-Whiz" 2001+ >1600 [10] ~ £8K [11] US $15K
Neighborhood electric vehicles (NEVs, top speed limited to 25 MPH)
Global Electric Motorcars Five models currently in production, including two pickup trucks; all electronically limited to 25 MPH to qualify as NEVs, and using lead-acid batteries. Acquired by DaimlerChrysler in 2000. [12] 1998+ >30,000 varies by model, US $7K [13] to $12.5K [14]
Dynasty EV Five models currently in production, all very similar to Sedan model, using lead-acid batteries and limited to 25 MPH to qualify as NEVs. Sedan range is 30 miles. 2001+

Comparison to internal combustion vehicles

Operational cost

Electric vehicles typically cost between two and four cents per mile to operate, while gasoline-powered ICE vehicles currently cost about four to six times as much. [4]

Energy efficiency

Production and conversion BEVs typically use 0.3 to 0.5 kilowatt-hours per mile (0.2 to 0.3 kWh/km). [5] [6] Nearly half of this power consumption is due to inefficiencies in charging the batteries. The U.S. fleet average of 23 MPG of gasoline is equivalent to 1.58 kWh/mi and the 70 MPG Honda Insight gets 0.52 kWh/mi (assuming 36.4 kWh per U.S. gallon of gasoline), so battery electric vehicles are relatively energy efficient. When comparisons of the total energy cycle are made, the relative efficiency of BEVs drops, but such calculations are usually not provided for internal combustion vehicles (e.g. the energy used to produce specialized fuels such as gasoline is usually left unstated.)

CO2 emissions [7] are useful for comparison of electricity and gasoline consumption. Such comparisons include energy production, transmission, charging, and vehicle losses. CO2 emissions improve in BEVs with sustainable electricity production but are fixed for gasoline vehicles. (Unfortunately, such figures for the EV1, Ford Ranger EV, EVPlus, and other production vehicles are unavailable.)

Model Short tons CO2
(conventional,
mostly fossil fuel
electricity production)
Short tons CO2
(renewable electricity
production,
e.g., solar panel
or wind power)
2002 Toyota RAV4-EV (pure BEV) 3.8 0.0
2000 Toyota RAV4 2wd (gasoline) 7.2 7.2
Other battery electric vehicle(s)
2000 Nissan Altra EV 3.5 0.0
Hybrid vehicles
2001 Honda Insight 3.1 3.1
2005 Toyota Prius 3.5 3.5
2005 Ford Escape H 2x 5.8 5.8
2005 Ford Escape H 4x 6.2 6.2
Internal combustion engine vehicles
2005 Dodge Neon 2.0L 6.0 6.0
2005 Ford Escape 4x 8.0 8.0
2005 GMC Envoy XUV 4x 11.7 11.7

Aerodynamic drag has a large impact on energy efficiency as the speed of the vehicle increases. A list of cars and their corresponding drag coefficients is available.

Environmental impact

Many factors must be considered when comparing vehicles' total environmental impact. The most comprehensive comparison is a "cradle-to-grave" or lifecycle analysis. Such an analysis considers all inputs including original production and fuel sources and all outputs and end products including emissions and disposal. The varying amounts and types of inputs and outputs vary in their environmental effects and are difficult to directly compare. For example, whether the environmental effects of nickel and cadmium pollution from a NiCd battery production facility are less than those of hydrocarbon emissions and petroleum refining is unknown. Similar comparisons would need to be addressed for each input and output in order to make fair judgement of relative total environmental impact.

A large lifecycle input difference of BEVs compared to ICE vehicles is that they require electricity instead of a liquid fuel. When the electricity is provided from renewable energy, this is a considerable advantage. However, if the electricity is produced from fossil fuel sources — as most electricity is — the relative advantage of the electric vehicle is substantially reduced. [8] So, developing additional renewable energy sources is necessary for electric vehicles to further reduce net emissions. Still, the environmental impact of electricity production (indirect emissions) depends on the electricity production mix, and are usually considerably lower than the direct emissions of ICE vehicles. [9]

Another lifecycle input of electric vehicles differing from internal combustion vehicles is the large battery pack. Modern batteries have been shown to be able to outlast the vehicle they are used in. Batteries tested by Toyota have shown only minimal degradation in performance after 150,000 miles. BEVs do not require a fuel-burning engine and their support systems or the related maintenance, so they are often more reliable and require less maintenance. Although BEVs are uncommon, advances in battery technology have taken place in other markets such as for mobile phones, laptops, forklifts and hybrid electric vehicles. Improvements to battery technology in such other markets make BEVs more practical.

Acceleration performance

File:VenturiFetish.jpg
Venturi Fetish - a limited production electric car capable of reaching 0-100km/h in 4.5 seconds

Many of today's BEVs are capable of acceleration performance which exceeds that of conventional gasoline powered vehicles. Electric vehicles can utilize a direct motor-to-wheel configuration which increases the amount of available power. Having multiple motors connected directly to the wheels allows for each of the wheels to be used for both propulsion and as braking systems, thereby increasing traction. In some cases, the motor can be housed directly in the wheel, such as in the Whispering Wheel design, which lowers the vehicle's center of gravity and reduces the number of moving parts. When not fitted with an axle, differential, or transmission, electric vehicles have greater torque availability, directly accelerating the wheels. A gearless or single gear design in some BEVs eliminates the need for gear shifting, giving the such vehicles both smoother acceleration and braking, and allows higher torque at a wide range of RPMs. For example, the Venturi Fetish delivers supercar acceleration despite a relatively modest 300 horsepower, and a top speed of only around 100 mph. Some DC motor-equipped drag racer BEVs, have simple two-speed transmissions to improve top speed. [10] [11] Larger vehicles, such as electric trains and land speed record vehicles, overcome this speed barrier by dramatically increasing the wattage of their power system.

Batteries

75 watt-hour/kilogram lithium ion polymer battery prototypes. Newer Li-poly cells provide up to 130 Wh/kg and last through thousands of charging cycles.

Batteries used in electric vehicles include "flooded" lead-acid, VRLA, NiCd, nickel metal hydride, Li-ion, Li-poly, zinc-air and the molten salt battery.

Charging

Battery electric vehicles must be refuelled by periodic charging of the batteries. BEVs most commonly charge from the power grid, which is in turn generated from a variety of domestic resources — primarily hydroelectricity, coal, natural gas, and nuclear. Home power such as roof top photovoltaic (solar cell) panels, microhydro or wind can also be used. Electricity can also be supplied with traditional fuels via a generator. Although not strictly a BEV, the Ford Reflex concept car incorporates solar cells into its exterior to help power its hybrid powertrain.

The charging time is limited primarily by the capacity of the grid connection. A normal household outlet is between 1.5 kW in the US to 3 kW in the rest of the world (countries with 240 V supply). The main connection to a house might be able to sustain 10 kW, and special wiring can be installed to use this. At this higher power level charging even a small, 7 kWh (14–28 mi) pack, would probably require one hour. Compare this to the effective power delivery rate of an average petro pump, about 5,000 kW. Even if the supply power can be increased, most batteries do not accept charge at greater than their 'charge rate' C1.

In 1995, some charging stations charged BEVs in one hour. In November 1997, Ford purchased a fast-charge system produced by AeroVironment called "PosiCharge" for testing its fleets of Ranger EVs, which charged their lead-acid batteries in between six and fifteen minutes. In February 1998, General Motors announced a version of its "Magne Charge" system which could recharge NiMH batteries in about ten minutes, providing a range of sixty to one hundred miles. [12]

In 2005, handheld device battery designs by Toshiba are claimed to be capable of accepting an 80% charge in as little as 60 seconds. [13] Scaling this specific power characteristic up to the same 7 kWh EV pack would result in the need for a peak of 336 kW of power from some source for those 60 seconds. It is not clear that such batteries will work directly in BEVs as heat build-up may make them unsafe.

Most people do not require fast recharging because they have enough time (6 to 8 hours) during the work day or overnight to refuel. As the charging does not require attention it takes a few seconds for an owner to plug in and unplug their vehicle. Many BEV drivers prefer refueling at home, avoiding the inconvenience of visiting a petro-station. Some workplaces provide special parking bays for electric vehicles with charging equipment provided.

The charging power can be connected to the car in two ways:

  • The second approach is known as inductive coupling. A special 'paddle' is inserted into a slot on the car. The paddle is one winding of a transformer, while the other is built into the car. When the paddle is inserted it completes a magnetic circuit which provides power to the battery pack. The major advantage of this approach is that there is no possibility of electrocution as there are no exposed conductors although interlocks can make conductive coupling nearly as safe. Conductive coupling equipment is lower in cost and much more efficient due to a vastly lower component count.

Travel range before recharging

The General Motors EV1 had a range of 75-150 miles with NiMH batteries in 1999.

The range of a BEV depends on the number and type of batteries used, and the performance demands of the driver. The weight and type of vehicle also has an impact just as it does on the mileage of traditional vehicles. Electric vehicle conversions usually use lead-acid batteries because they are the most available and inexpensive. Such conversions generally have a range of 20 to 50 miles (30 to 80 km). Production EVs with lead-acid batteries are capable of up to 80 miles (130 km) per charge. NiMH batteries have higher energy density and may deliver up to 120 miles (200 km) of range. New lithium-ion battery-equipped EVs are said to provide 250-300 miles (400-500 km) of range per charge. [14] Finding the balance of range versus performance, battery capacity versus weight, and battery type versus cost challenges every EV manufacturer.

EVs can also use pusher trailers or genset trailers in order to function as a hybrid vehicle for occasions when extended range is desired without the additional weight during normal short range use. Such vehicles become internal combustion engine-powered when utilizing their trailer, allowing greater range that may be needed for longer trips.

Replacing

An alternative to recharging is to replace drained batteries with charged batteries. Discharged modular electric car batteries can be replaced by charged ones in the fuel stations, car shops or similar places.

File:1991.jpg
Battery electric vehicles at the Austria Solar 1991 exposition (courtesy greenfleet.info)

Lifespan

Individual batteries are usually arranged into large battery packs of various voltage and ampere-hour capacity products to give the required energy capacities. Battery life must be considered when calculating cost of operation, as all batteries wear out and must be replaced. The rate at which they expire depends on a number of factors.

New scientific and empirical evidence from running individual EV conversions shows that most of these negative factors linked to batteries connected in series for traction application can be mitigated with good DC/DC based battery management system, thermal insulation and venting, and proper care. That also includes selecting a well balanced mix of components oriented towards specific performance properties, i.e. range, speed. For instance a recombination type of lead-acid battery with C1 hour discharge rate about 120Ah (equals to 220Ah C20 "marketing rating") should be used accordingly. Therefore the EV overall consumption of particular low/mid voltage vehicle should not often exceed in this example 80-100% of this C1 hours rating — this applies for more advanced battery chemistries like Li-ion with slightly higher discharges C3-C5 as well. In this particular example, longevity of the lead-acid battery pack will be preserved by not discharging it in a prolonged or continuous regime above 120Ah currents.

The depth of discharge (DOD) is the recommended proportion of the total available energy storage for which that battery will achieve its rated cycles. Deep cycle lead-acid batteries generally should not be discharged below 50% capacity. More modern formulations can survive deeper cycles. In real world use some fleet RAV4-EVs (using NiMH batteries) have exceeded 100,000 miles (160,000 km) with little degradation in their daily range. [15] Quoting that report's concluding assessment:

The five-vehicle test is demonstrating the long-term durability of Nickel Metal Hydride batteries and electric drive trains. Only slight performance degradation has been observed to-date on four out of five vehicles. CON 2 EV, as discussed earlier, still has a capacity of 85% of nominal value but the range is 53 miles. A similar loss in range was experienced by CON3 EV but was successfully recovered. EVTC test data provide strong evidence that all five vehicles will exceed the 100,000-mile mark. SCE’s positive experience points to the very strong likelihood of a 130,000 to 150,000-mile Nickel Metal Hydride battery and drive-train operational life. EVs can therefore match or exceed the lifecycle miles of comparable internal combustion engine vehicles.
In June 2003 the 320 RAV4 EVs of the SCE fleet were used primarily by meter readers, service managers, field representatives, service planners and mail handlers, and for security patrols and carpools. In 5 years of operation, the RAV4 EV fleet had logged more than 6.9 million miles, eliminating about 830 tons of air pollutants, and preventing more than 3,700 tons of tailpipe carbon dioxide emissions. Given the successful operation of its EVs to-date, SCE plans to continue using them well after they all log 100,000-miles.

Jay Leno's 1909 Baker Electric still operates on its original Edison cells. Battery replacement costs may be partially or fully offset by the lack of regular maintenance such as oil and filter changes and by greater reliability due to fewer moving parts.

Critics claim that batteries pose a serious environmental hazard requiring significant disposal or recycling costs. Some of the chemicals used in the manufacture of advanced batteries such as Li-ion, Li ion polymer and zinc-air are hazardous and potentially environmentally damaging. While these technologies are developed for small markets this is not a concern, but if production was to be scaled to match current car demand the risks might become unacceptable.

Supporters counter with the fact that traditional car batteries are one of the most successful recycling programs and that widespread use of battery electric vehicles would require the implementation of similar recycling regulations. More modern formulations also tend to use lighter, more biologically remediable elements such as iron, lithium, carbon and zinc. In particular, moving away from the heavy metals cadmium and chromium makes disposal less critical.

It is also not clear that batteries pose any greater risk than is currently accepted for fossil fuel based transport. Petrol and diesel powered transportation cause significant environmental damage in the form of spills, smog and distillation byproducts.

Safety

Firefighters and rescue personnel receive special training to deal with the higher voltages encountered in electric and hybrid gas-electric vehicle accidents.

Hobbyists, research, and racing

Bob Schneeveis demonstrates his Silver Sofa hobbyist BEV at the 2005 33rd annual Silicon Valley Electric Automobile Association's Stanford Electric Car Rally.
The Silver Sofa can spin in place and is charged by solar panels.

There is a minor industry supporting the conversion and building of BEVs by hobbyists. Some designers point out that a specific type of electric vehicle offers comfort, utility and quickness, sacrificing only range. This is called a short range electric vehicle. This type may be built using high performance lead–acid batteries, but of only about half the mass that would be expected to obtain a 60 to 80 mile (100 to 130 km) range. The result is a vehicle with about a thirty mile (50 km) range, but when designed with appropriate weight distribution (40/60 front to rear) does not require power steering, offers exceptional acceleration in the lower end of its operating range, is freeway capable and legal, and costs less to build and maintain. By including a manual transmission this type of vehicle can obtain both better performance and higher efficiency than the single speed types developed by the major manufactures. Unlike the converted golf carts used for neighborhood electric vehicles, these may be operated on typical suburban throughways (40 to 45 mph or 60 or 70 km/h speed limits are typical) and can keep up with traffic typical to these roads and to the short on and off segments of freeways that are common in suburban areas.

Aside from production electric cars, often hobbyists build their own EVs by converting existing production cars to run solely on electricity. Some even drag race them as members of NEDRA. Universities such as the University of California, Irvine even go so far as to build their own custom electric or hybrid-electric cars from scratch.

A non-profit program "CalCars" at the University of California, Davis, is attempting to convert a hybrid Toyota Prius automobile to operate as a plug-in hybrid electric vehicle (PHEV) through the installation of additional batteries and software modifications. Such a vehicle will operate as would a pure electric for short trips, taking its power from household and workplace rechargers. For longer trips the vehicle will operate as it does at present—as a "strong" hybrid vehicle. A prototype (using sealed lead-acid batteries) is undergoing tests. It is expected that a production conversion would use a more advanced battery. (Advanced batteries are under development and soon for production in the support of hybrid vehicles.) They are currently soliciting donations of additional vehicles and funds for this project.

Battery electric vehicles are also highly popular in quarter mile (400 m) racing. The National Electric Drag Racing Association regularly holds electric car races and often competes them successfully against exotics such as the Dodge Viper.

Eliica prototype
  • Japanese Prof. Dr. Hiroshi Shimizu from Faculty of Environmental Information of the Keio University created the limousine of the future: the Eliica (Electric Lithium Ion Car) has 8 wheels with electric 55 kW hub motors (8WD) with an output of 470 kW and zero emissions. With a top speed of 190 km/h and a maximum reach of 320 km provided by lithium-ion-batteries. (video at eliica.com)
  • German Umweltbrief want to convert an old-timer car into full electric drive with 4 wheel hub motors; a retro car for the 21th century called electro4. This drive is nearly free of abrasion and maintenance and very reliable. Further advantages are optimal capability of acceleration and best traction through individual control of the wheels. Also the power is generated in the place where its used. Gearbox, kardan shaft and drive shaft become unnecessary, which means less weight. Even an old car can get a torque of 1000 N·m. This 4WD is very silent. There is no vibration and no motor cold-running, the full energy is available immediately. Also small cars can get this system. All is combinable with anti-block system, anti-slip system, stability system, etc., climate control with a/c, heating/cabin, pre-conditioning etc.

Future

File:New Vehicle Purchase Preference.gif
The number of US survey respondents willing to pay $4,000 more for a plug-in hybrid car increased from 17% in 2005 to 26% in 2006.

The future of battery electric vehicles depends primarily upon the availability of batteries with high energy densities, power density, long life, and reasonable cost as all other aspects such as motors, motor controllers, and chargers are fairly mature and cost competitive with ICE components. Li-ion, Li-poly and zinc-air batteries have demonstrated energy densities high enough to deliver range and recharge times comparable to conventional vehicles. Aluminum batteries offer exceptional theoretical performance[15] and have been proposed as an international shipboard energy transfer mechanism[16] While hybrid vehicles apply many of the technical advances first developed for BEVs, they are not considered BEVs. Of interest to BEV developers, however, is the fact that hybrid vehicles are advancing the state of the art (in cost/performance ratios) of batteries, electric motors, chargers, and motor controllers, which may bode well for the future of both pure electric vehicles and the plug-in hybrid vehicles (PHEVs). As hybrids become more refined, battery life, capacity and energy density will improve and the internal combustion engine (ICE) will be used less, especially in PHEVs. At some point it may become economic for such hybrids to be sold without their ICE, finally leading to BEVs being commonplace. General Motors has reportedly been developing a plug-in hybrid, which may be ready in time for the Detroit auto show in January, 2007. [16]

Various pre-production announcements by major Japanese manufacturers suggest that there may soon be a breakthrough in the availability of non-exotic, general purpose electric vehicles suitable for everyday use on available roads in mixed traffic conditions:

  • Mitsubishi has committed to creating a flexible product line based upon the Colt minivan with motors within the wheels that can be produced as a BEV, a hybrid, or a fuel cell vehicle. No North American import commitment has been made, however.
  • Subaru may accelerate their R1e prototype development. Initially proposed for 2007 production, this was pushed back to 2010 but may be moved up in response to fuel prices, advances in battery technology, and worldwide market interest.
  • Toyota has suggested that the next generation Prius may have Lithium-Ion batteries and a nine mile "stealth" range (to support 110 MPG in appropriate conditions), suggesting the future possibility of a plug-in hybrid Prius.
  • While the General Motors investment in Ovonics's large format Nickel-Metal Hydride batteries was sold[17][18] to Texaco, now part Chevron, no oil company controls the lithium battery market. Developed by East Asian firms for use in portable computer equipment, the patents and production are beyond the reach of US automakers and oil companies, except as they may lobby for tariffs on the import of batteries or vehicles (as has been done with imports of ethanol fuels currently taxed at 100 percent of value at the behest of maize-based ethanol producers.)


Production announcements

The following BEV models have been announced as entering production:

  • Mitsubishi, a Japanese automobile manufacturer, announced on May 11 2005 that it will mass-produce its MIEV (Mitsubishi In-wheel Electric Vehicle.) Test fleets are to arrive in 2006 and production models should be available in 2008: story at abcnews.go.com. The first test car, revealed to be Colt EV, is expected to have a range of 93 miles using lithium-ion batteries and in-wheel electric motors. The target price of a MIEV should be around US$19,000. No export decision has yet been made: story at msnbc.msn.com
  • Plug-in hybrid electric vehicles are being developed by the California Cars Initiative, Edrive Systems, and Hymotion. They take a Toyota Prius, add more battery capacity and modify the controller. Then they can get 250 mpg by plugging in at home for a small light charge each night. Edrive and Hymotion in 2005 announced plans to modify other hybrid models, including the Ford Escape. [17]
  • SVE (Société de Véhicules Électric, a company formed by the French Dasseault and Heuliez group) announced they will produce the Cleanova II (French only), based on the Kangoo. It will be available in pre-mass-production in 2007 and mass-production in 2008. The system exists in two versions: all electric (200km autonomy) and rechargeable hybrid (500km autonomy). The system include an electric engine developed by TM4 a subsidiary of Hydro-Quebec, from Quebec Canada who developed also since 20 years an electric wheel motor.

List of recent prototypes

Recent prototype EVs include:

Controversy

File:Evcrushed.jpg
Crushed General Motors EV1s

In the USA, some EV fans have accused the three major domestic manufacturers, General Motors, Chrysler Corporation and Ford Motor Company of deliberately sabotaging their own electric vehicle efforts through several methods: failing to market, failing to produce appropriate vehicles, failing to satisfy demand, and using lease-only programs with prohibitions against end of lease purchase. By these actions they have managed to terminate their BEV development and marketing programs despite operators' offers of purchase and assumption of maintenance liabilities. They also point to the Chrysler "golf cart" program as an insult to the marketplace and to mandates, accusing Chrysler of intentionally failing to produce a vehicle usable in mixed traffic conditions. The manufacturers, in their own defense, have responded that they only make what the public wants. EV fans point out that this response is the same argument used by GM to justify the intensively promoted 11 mpg 6500 lb (2,950 kg) Hummer H2 SUV. However, at the end of their programs GM destroyed its fleet, despite offers to purchase them by their drivers. Ford's Norwegian-built "Th!nk" fleet was covered by a three-year exemption to the standard U.S. Motor Vehicle Safety laws, after which time Ford had planned to dismantle and recycle its fleet; the company was, however, persuaded by activists to not destroy its fleet but return them to Norway and sell them as used vehicles. Ford also sold a few lead-acid battery Ranger EVs, and some fleet purchase Chevrolet S-10 EV pickups are being refurbished and sold on the secondary market.

The three major American motor companies have almost exclusively promoted their electric cars in the American market, where gas is comparatively cheap, and virtually ignored the European market, where gas is significantly more expensive. This can be seen as avoiding the market. Because of the much higher fuel costs, the latent demand for electric vehicles would presumably be higher in Europe, and the outcome of increased BEV sales would, in turn, be more certain.

Educational literature (for children) is still available that teaches that lead-acid batteries cannot store enough energy to make an electric vehicle practical. In itself true, this statement is a lie through omission, as it ignores more advanced battery designs.

Both Honda and Toyota also manufactured electric-only vehicles. Honda followed the lead of the other majors and terminated their lease-only programs, completely destroying their fleet and its components by shredding. Toyota offered vehicles for both sale and lease. While Toyota has terminated manufacture of new vehicles, it continues to support those manufactured. It is actually possible to see a RAV-4 EV on the road, but this is indeed a rare sight.

A film on the subject, directed by former EV1 owner and activist Chris Paine, entitled Who Killed the Electric Car? premiered at the Sundance Film Festival and at the Tribeca Film Festival in 2006, and is now (July 2006) in theatrical release.

Proponents' arguments

The greatest fans of BEVs are those who have obtained or built and used them. This is a self-selected group because BEVs have not been promoted by the major manufacturers in the United States, so their enthusiasm may be misleading. Owners of conventional gasoline vehicles, once given the chance to live with an BEV often leave their gasoline cars sitting in the driveway. Spouses, luke warm when the vehicle is purchased often take over the vehicle from the purchaser once they use it. Fans point out the following:

  • BEVs will reduce dependence on oil, especially oil from unstable regions.
  • BEVs mitigate global warming.
  • BEVs are quieter than internal combustion engine vehicles.
  • BEVs do not produce noxious fumes.
  • BEVs can be powered indirectly by home photovoltaics using net metering, which offers advantages to both power producers and other grid users through peak demand satisfaction and to the EV user through cost reduction and load balancing, especially with time of use net metering.
  • BEVs can readilly satisfy the needs for short trips, a satisfactory arrangement for multiple vehicle families
  • Home refueling is more convienent than a trip to the gasoline station.
  • Fueling costs are more predictable, not subject to the daily international situation.
  • Maintenance such as oil changes, smog inspections (and their sometimes expensive consequences), cooling fluid relacement, and periodic repair and adjustments are reduced or completely eliminated, significantly reducing the cost of operation.

Detractors' arguments

Skeptics of the viability of BEV's fall into two groups, one arguing on "conventional" practical grounds and the other on practical grounds (often termed as idealistic) regarding the various problems of the car, in addition to tailpipe emissions.

The former group points, among other issues, to the limited driving range available today between fillings.

The other group ponders the future of the car as a transport solution for even more widespread global adoption, noting that the issues of traffic jams, noise pollution, total life-cycle pollution, energy expenditure and the health toll of a sedentary lifestyle, will not be solved by zero-emission vehicles.

See also

Electric scooter at the 2005 Vancouver EV gathering

References

  1. ^ Bellis, M. (2006) "The History of Electric Vehicles: The Early Years" About.com article at inventors.about.com accessed on 6 July 2006
  2. ^ Bellis, M. (2006) "The History of the Automobile: The First Mass Producers of Cars - The Assembly Line" About.com article at inventors.about.com accessed on 5 July 2006
  3. ^ McMahon, D. (2006) "Some EV History" Econogics, Inc. essay at econogics.com accessed on 5 July 2006
  4. ^ Idaho National Laboratory (2005) "Comparing Energy Costs per Mile for Electric and Gasoline-Fueled Vehicles" Advanced Vehicle Testing Activity report at avt.inel.gov accessed 11 July 2006.
  5. ^ Idaho National Laboratory (2006) "Full Size Electric Vehicles" Advanced Vehicle Testing Activity reports at avt.inel.gov accessed 5 July 2006
  6. ^ Idaho National Laboratory (2006) "1999 General Motors EV1 with NiMH: Performance Statistics" Electric Transportation Applications info sheets at inel.gov accessed 5 July 2006
  7. ^ US Department of Energy and Environmental Protection Agency (Model year 2007) "Search for cars that don't need gasoline" Fuel Economy Guide database at fueleconomy.gov accessed 5 July 2006
  8. ^ Tahara, K. et al. (2001) "Comparison of CO2 Emissions from Alternative and Conventional Vehicles." World Resources Review 13:52-60 summary at ilea.org accessed 5 July 2006
  9. ^ Van Mierlo, J., et al. (2003) "Environmental Damage Rating Analysis Tool as a Policy Instrument" 20th International Electric Vehicle Symposium and Exposition (Long Beach, California) conference paper at etecmc10.vub.ac.be accessed 14 July 2006
  10. ^ Hedlund, R. (2006) "The 100 Mile Per Hour Club" National Electric Drag Racing Association list at nedra.com accessed 5 July 2006
  11. ^ Hedlund, R. (2006) "The 125 Mile Per Hour Club" National Electric Drag Racing Association list at nedra.com accessed 5 July 2006
  12. ^ Anderson, C.D. and Anderson, J. (2005) "New Charging Systems" Electric and Hybrid Cars: a History (North Carolina: McFarland & Co., Inc.) ISBN 0-7864-1872-9, p. 121.
  13. ^ Toshiba Corporation (2005) "Toshiba's New Rechargeable Lithium-Ion Battery Recharges in Only One Minute" press release at toshiba.co.jp accessed 5 July 2006
  14. ^ Mitchell, T. (2003) "AC Propulsion Debuts tzero with LiIon Battery" AC Propulsion, Inc. press release at acpropulsion.com accessed 5 July 2006
  15. ^ Knipe, TJ et al. (2003) "100,000-Mile Evaluation of the Toyota RAV4 EV" Southern California Edison, Electric Vehicle Technical Center report at evchargernews.com accessed on 5 July 2006
  16. ^ Green, J. (2006) "GM Plans Gas-Electric Car to Catch Up to Toyota, People Say" Bloomberg News report at bloomberg.com accessed 10 July 2006.
  17. ^ International Humanities Center (2006) "2006 Goals and 2005 Year-End Report" California Cars Initiative for Plug-In Hybrids report at calcars.org accessed 10 July 2006.

Patents

News stories

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