Electric Vehicles

Nowadays people have more varied choices in buying vehicles and cars. As now they have the option of electric vehicles. But what exactly electric vehicle is? In simple words an electric vehicle, or EV, is a vehicle with one or more electric motors for propulsion. Thus, the motion may be provided either by wheels or propellers driven by rotary motors, or in the case of tracked vehicles, by linear motors.

The energy used to propel these kind of can be obtained from various sources such as:

1. From chemical energy stored on the vehicle in on-board batteries: Battery electric vehicle

2. From both an on-board rechargeable energy storage system (RESS) and fueled propulsion power source: hybrid vehicle

3. Generated on-board using a combustion engine, as in a diesel-electric locomotive

4. Generated on-board using a fuel cell: fuel cell vehicle

5. Generated on-board using nuclear energy, on nuclear submarines and aircraft carriers

6. From more esoteric sources such as flywheels, wind and solar

7. From a direct connection to land-based generation plants, as is common in electric trains and trolley buses

Electric vehicles generally use electric motors used to drive vehicles because they can be finely controlled, they deliver power efficiently and they are mechanically very simple. Moreover these electric motors often achieve 90% conversion efficiency over the full range of speeds and power output and can be precisely controlled. Thus it won’t be wrong to say that these electric motors can provide high torque while an electric vehicle is stopped, unlike internal combustion engines, and do not need gears to match power curves.

These days electric vehicle is designed in two ways those are Battery Electric Vehicles and Hybrid vehicles. Battery Electric Vehicles covert chemical energy to electrical energy in batteries; whereas Hybrid vehicles, which convert chemical energy to electrical energy via an internal combustion engine and a generator. However, there is another less established form of electric vehicle which is the ‘plug-in hybrid’. This ‘plug-in hybrid’ attempts to combine the benefits of both these designs and allows the moderate capacity batteries of a hybrid vehicle to be recharged not only from the internal combustion engine and generator.

Electric Vehicles include electric wheelchairs, the Segway HT, electric motorcycles and scooters, motorized bicycles, golf carts and neighborhood electric vehicles. Furthermore some working electric vehicles include heavy work equipment, fork lifts, and numerous other service and support vehicles. Thus, if you are an environment conscious then electric vehicle is best for you.

How Are Electric Vehicles Charged?

Before buying an electric vehicle it is essential to gain familiarity with the necessary on-board equipment to prevent “charging” or, to use a current term, “top-up” problems.

It is important to check that the electric vehicle is fitted with a battery charger with a “standard” connection, i. e. suitable to draw electrical energy directly from ENEL’s grid and therefore from the power outlet in our garage. If it’s not then there is something wrong and you need to contact the seller.

This solution in the standard equipment fitted on an electric vehicle allows to charge the batteries in any place with mains electricity. Indeed electric cars have other various types of battery chargers. However, these do not allow to draw electricity from the mains supply but need special adapters or need to be connected directly to the charging points in service stations now available in large towns. The ideal solution is to have a battery charger on board the car with a high-frequency standard socket without the need to resort to external devices.

When taking into consideration an electric vehicle one needs to examine the costs to bear for the energy required to power the set of batteries. Models that allow to reduce energy costs are definitely the ones that allow to charge the batteries directly from the national domestic mains supply. Usually a full energy charge for a complete set of traction batteries for vehicles that draw energy directly from the mains supply does not cost more than 2 euros.

Vehicles fitted with a standard battery charger allow to optimise the time spent at home to charge the batteries. Indeed on average it takes 8 hours to fully charge a set of traction batteries. We recommend charging the entire set of batteries overnight, after the vehicle has been used during the day, in conjunction with the cheapest electricity tariff. It is also possible to charge the batteries for less time during the day for partial charges.

Partial charges do not result in problems affecting the runtime and/or efficiency of the set of batteries, as they are not subject to the memory effect. Precisely because they do not suffer from the memory effect, the set of batteries of electric vehicles has an average life of about 4 years.

A fully charged set of batteries of an electric vehicle allows for an uptime that varies between 70 and 100 km, depending on the model and set-up selected.

Are Electric Vehicles Ready for Prime Time?

Okay, so you are ready to do your part to reduce fossil fuel usage and you are considering an EV (Electric Vehicle). Several manufactures are marketing EV’s, but which one is right for you? Everyone has different driving styles and needs. How far can you go on a 100% EV? How reliable are they? Are there any savings? Some of these questions will be answered below to help you determine if this technology is ready for you.

There are three types of EV’s available. But, are they ready for prime time? You decide.

  1. Dedicated EV- Electric only
  2. Extended EV Electric with gasoline engine
  3. Plug-in hybrids

Dedicated EV is an electric only vehicle. There are four models available or expected out by 2012.

  1. Nissan Leaf is a four-door five-passenger hatch back pure battery electric vehicle. It has an expected range of 100 miles between charges, which Nissan says is sufficient for 90% of Americans. It takes eight hours or more to fully charge with a 220-volt outlet and longer with a 110-volt outlet. The starting price is estimated at $33,600. The warranty on the battery and related hardware is eight years or 100,000 miles. The estimated cost to replace the battery is $18,000. Expected availability is December 2010.
  2. Mini E Cooper is a two-door two-passenger pure battery electric vehicle. It has an expected range of 156 miles under ideal conditions. Most drivers get about 100 miles between charges. It takes approximately 3 hours to charge with a 240 volt 48 Amp outlet or 4.5 hours with a 32-amp outlet. If using a 110 volt 12 amp outlet it takes approximately 26.5 hours to charge. This is a two-passenger vehicle because the battery takes up the entire back seat. The regenerative braking takes a little getting used to, the system kicks in as soon as the driver lifts his foot off the accelerator pedal. This causes the vehicle to begin slowing before the brake pedal is applied. BMW is leasing these vehicles as part of a special program. They are developing a replacement based on the BMW 1 Series, which is due out in 2011.
  3. Ford Focus EV is a four-door sedan based on the redesigned 2012 Focus. The prototypes have a 23-kilowatt hour lithium-ion battery pack with an estimated range of 100 miles. Charge time is approximately 6 hours on a 220-volt charger.
  4. Tesla Roadster first started selling in 2008. It has a price tag of $111,000, it is a two-seater sports car. It is based on the Lotus Elise with a fiberglass body. This car is a rocket, it can accelerate from zero to 60 in under four seconds. It has a range of 245 miles with a massive 53-kilowatt-hour battery pack. Full charge takes 3.5 hours on a proprietary 240-Volt 70 amp charger. It has a very stiff and jarring ride with a very basic interior. It is awkward climbing into the cockpit because of the tall wide sill. The loud battery-cooling fans emit a constant roar behind you. Tesla is developing a lower cost $50,000+ model S sedan expected to be released in 2012.

Extended EV electric with gasoline engine

The Chevrolet Volt is the only model that falls within this category. It is a four-door four-passenger sedan. The Volt does not have a rear bench seat like most vehicles because of the T shaped battery pack. It has a range of 40 miles on electric power. GM states this is sufficient for 75% of commuters. Once the battery level drops below a certain level, a small gas engine kicks in to provide enough electric power to run the electric motor. The overall range is 300 miles before filling the gas tank or charging the batteries. GM says the Volt can run with never being plugged in. However, it will impact the fuel economy. Charge time for the Volt is four hours on 220 volt or eight to 10 hours on 110-volt outlets. The Volt charges faster than the dedicated electric vehicles because it has a smaller battery. The battery warranty for the Volt is the same as the Nissan leaf. The warranty on the battery and related hardware is eight years or 100,000 miles. The starting price for the Volt is $41,000. The replacement cost of the Lithium-ion battery is approximately $8000, which is $10,000 less than the Leaf. The electric motor produces 149 horse power and 273 pound-feet of torque. Those torque numbers are about the same as a V-6 engine.

Plug-in Hybrids

There are no manufactures producing plug-in Hybrids as of this writing. However, there are some aftermarket companies producing aftermarket add on batteries for the Toyota Prius. The extra cost of these add on batteries is approximately $11,000. This added battery boosts the gas mileage by approximately 50% for the first 35 miles. Once the battery is depleted, the Prius reverts back to its regular hybrid operation at which time the fuel economy drops slightly below that of a standard Prius because of the added battery weight. Toyota is field-testing the plug-in Prius for commercial use. There are no expected models for retail customers until 2012.

Some things to consider before purchasing an EV

What are your driving habits? What are the longest distances you will be traveling? When driving a pure electric vehicle; if the battery runs out completely with no charging stations available you will be stranded. With the long charge times, it will take some time to make the vehicle usable again. This is where the extended range Volt becomes more practical. Filling up the gas tank is faster than waiting for the battery to charge.

Using other electrical features like the Air Conditioning, Heating, Lights, Wind Shield Wipers and playing Music; engineers say this can consume approximately 50% of the battery power which will reduce the vehicles range.

Lithium-ion technology battery life is undetermined, however, the eight year 100,000 mile warranty on the Chevrolet Volt and the Nissan Leaf do give some piece of mind.

Cost savings

An EV costs about.04 cents per-mile (depending on the electric rates in your area). You can compare that to a Toyota Corolla at 30 mpg paying $2.80 per gallon, the per-mile cost is.09 cents.

Government incentives

The first 200,000 EV buyers from each automaker are eligible for $7,500 federal tax credit. There are also some regional incentives; for instance, California will offer an additional $5000 tax credit for “zero emission” vehicles. Check your area for local incentives.

To conclude, there are four 100% electric vehicles available by 2012. One extended range vehicle, which could be zero emission if your driving range is within the available battery level. And there are the more common Hybrids, like the Prius which runs mostly on regular gas but with great mileage and with the future pilot of the Prius as a plug in, this vehicle will eventually fall within the extended range category.

Is the EV ready for prime time? Your driving habits and needs will tell. How far do you drive daily, can you plugin at work? Are most of your driving needs around town? This is where the greatest benefits will be realized. What part of the country do you live in? Will an EV work in your environment? Parts of the country with extreme heat or cold will require more battery usage to heat or cool the vehicle, which will reduce the range. Will this reduce your cost savings?

With government incentives, the cost of one of these EV’s can be reduced to a more acceptable range, keeping the cost closer to a conventional gas vehicle. There are also reduce maintenance costs with an EV, no oil changes and the electric motors are mostly maintenance free.