Electric car

An electric car, battery electric car, or all-electric car is an automobile that is propelled by one or more electric motors, using only energy stored in batteries. Compared to internal combustion engine (ICE) vehicles, electric cars are quieter, have no exhaust emissions, and lower emissions overall. In the United States and the European Union, as of 2020, the total cost of ownership of recent electric vehicles is cheaper than that of equivalent ICE cars, due to lower fueling and maintenance costs. Charging an electric car can be done at a variety of charging stations; these charging stations can be installed in both houses and public areas.

Worldwide, 6.6 million plug-in electric cars were sold in 2021, more than doubling 2020 sales, and achieving a market share of 9% of the global new car market. All-electric cars represented 71% of plug-in car sales in 2021. , 16 million plug-in electric cars were on the world's roads. Many countries have established government incentives for plug-in electric vehicles, tax credits, subsidies, and other non-monetary incentives while several countries have legislated to phase-out sales of fossil fuel cars, to reduce air pollution and limit climate change.

The Tesla Model 3 became the world's all-time best-selling electric car in early 2020, and in June 2021 became the first electric car to pass 1 million global sales. Earlier models with widespread adoption include the Japanese Mitsubishi i-MiEV and the Nissan Leaf. Together with other emerging automotive technologies such as autonomous driving, connected vehicles and shared mobility, electric cars form a future mobility vision called Autonomous, Connected, Electric and Shared (ACES) Mobility.

Terminology

The term "electric car" typically refers specifically to battery electric vehicles (BEVs) or all-electric cars, a type of electric vehicle (EV) that has an onboard rechargeable battery pack that can be plugged in and charged from the electric grid, and the electricity stored on the vehicle is the ''only'' energy source that provide propulsion for the wheels. The term generally refers to highway-capable automobiles, but there are also low-speed electric vehicles with limitations in terms of weight, power and maximum speed that are allowed to travel on public roads. The latter are classified as Neighborhood Electric Vehicles (NEVs) in the United States, and as electric motorised quadricycles in Europe.

History

Early developments

Robert Anderson is often credited with inventing the first electric car some time between 1832 and 1839.

The following experimental electric cars appeared during the 1880s:
* In 1881, Gustave Trouvé presented an electric car at the Exposition internationale d'Électricité de Paris.
* In 1884, over 20 years before the Ford Model T, Thomas Parker built an electric car in Wolverhampton using his own specially-designed high-capacity rechargeable batteries, although the only documentation is a photograph from 1895.
* In 1888, the German Andreas Flocken designed the Flocken Elektrowagen, regarded by some as the first "real" electric car.

Electricity was among the preferred methods for automobile propulsion in the late-19th and early-20th centuries, providing a level of comfort and an ease of operation that could not be achieved by the gasoline-driven cars of the time. The electric vehicle fleet peaked at approximately 30,000 vehicles at the turn of the 20th century.

In 1897, electric cars first found commercial use as taxis in Britain and in the United States. In London, Walter Bersey's electric cabs were the first self-propelled vehicles for hire at a time when cabs were horse-drawn. In New York City, a fleet of twelve hansom cabs and one brougham, based on the design of the Electrobat II, formed part of a project funded in part by the Electric Storage Battery Company of Philadelphia. During the 20th century, the main manufacturers of electric vehicles in the United States included Anthony Electric, Baker, Columbia, Anderson, Edison, Riker, Milburn, Bailey Electric, and Detroit Electric. Their electric vehicles were quieter than gasoline-powered ones, and did not require gear changes.

Six electric cars held the land speed record in the 19th century. The last of them was the rocket-shaped La Jamais Contente, driven by Camille Jenatzy, which broke the speed barrier by reaching a top speed of in 1899.

Electric cars remained popular until advances in internal-combustion engine (ICE) cars and mass production of cheaper gasoline- and diesel-powered vehicles led to a decline. ICE cars' much quicker refueling times and cheaper production-costs made them more popular. However, a decisive moment came with the introduction in 1912 of the electric starter motor that replaced other, often laborious, methods of starting the ICE, such as hand-cranking.

File:Capture d’écran 2016-10-14 à 21.26.28.png, Gustave Trouvé's personal electric vehicle (1881), the world's first publicly presented full-scale electric car
File:Thomas Parker Electric car.jpg, Early electric car built by Thomas Parker - photo from 1895
File:Jamais contente.jpg, "La Jamais Contente", 1899
File:Apollo15LunarRover.jpg, NASA's Lunar Roving Vehicles were battery-driven
File:EV1 (6).jpg, The General Motors EV1, one of the cars introduced due to a California Air Resources Board (CARB) mandate, had a range of with NiMH batteries in 1999.
File:Tesla Roadster.JPG, The Tesla Roadster helped inspire the modern generation of electric vehicles.

Modern electric cars

In the early 1990s the California Air Resources Board (CARB) began a push for more fuel-efficient, lower-emissions vehicles, with the ultimate goal of a move to zero-emissions vehicles such as electric vehicles. In response, automakers developed electric models. These early cars were eventually withdrawn from the U.S. market, because of a massive campaign by the US automakers to discredit the idea of electric cars.

California electric-auto maker Tesla Motors began development in 2004 of what would become the Tesla Roadster, first delivered to customers in 2008. The Roadster was the first highway-legal all-electric car to use lithium-ion battery cells, and the first production all-electric car to travel more than per charge.

Better Place, a venture-backed company based in Palo Alto, California, but steered from Israel, developed and sold battery charging and battery swapping services for electric cars. The company was publicly launched on 29 October 2007 and announced deployment of electric vehicle networks in Israel, Denmark and Hawaii in 2008 and 2009. The company planned to deploy the infrastructure on a country-by-country basis. In January 2008, Better Place announced a memorandum of understanding with Renault-Nissan to build the world's first Electric Recharge Grid Operator (ERGO) model for Israel. Under the agreement, Better Place would build the electric recharge grid and Renault-Nissan would provide the electric vehicles. Better Place filed for bankruptcy in Israel in May 2013. The company's financial difficulties were caused by mismanagement, wasteful efforts to establish toeholds and run pilots in too many countries, the high investment required to develop the charging and swapping infrastructure, and a market penetration far lower than originally predicted.

The Mitsubishi i-MiEV, launched in 2009 in Japan, was the first highway-legal series production electric car, and also the first all-electric car to sell more than 10,000 units. Several months later, the Nissan Leaf, launched in 2010, surpassed the i MiEV as the best selling all-electric car at that time.

Starting in 2008, a renaissance in electric vehicle manufacturing occurred due to advances in batteries, and the desire to reduce greenhouse-gas emissions and to improve urban air quality.''See Introduction'' During the 2010s, the electric vehicle industry in China expanded greatly with government support. The subsidies introduced by the Chinese government will however be cut by 20 to 30% and phased out completely before 2023. Several automakers marked up the prices of their electric vehicles in anticipation of the subsidy adjustment, including Tesla, Volkswagen and Guangzhou-based GAC Group, which counts Fiat, Honda, Isuzu, Mitsubishi, and Toyota as foreign partners.

In July 2019 US-based ''Motor Trend'' magazine awarded the fully-electric Tesla Model S the title "ultimate car of the year". In March 2020 the Tesla Model 3 passed the Nissan Leaf to become the world's all-time best-selling electric car, with more than 500,000 units delivered; it reached the milestone of 1 million global sales in June 2021.

In the third quarter of 2021, the Alliance for Automotive Innovation reported that sales of electric vehicles had reached six percent of all US light-duty automotive sales, the highest volume of EV sales ever recorded at 187,000 vehicles. This was an 11% sales increase, as opposed to a 1.3% increase in gasoline and diesel-powered units. The report indicated that California was the US leader in EV with nearly 40% of US purchases, followed by Florida – 6%, Texas – 5% and New York 4.4%.

Electric companies from the Middle East have been designing electric cars. Oman's Mays Motors have developed the Mays i E1 which is expected to begin production in 2023. Built from carbon fibre, it has a range of about and can accelerate from in about 4 secs. In Turkey, the EV company Togg is starting production of its electric vehicles. Batteries will be created in a joint venture with the Chinese company Farasis Energy.

Economics

Manufacturing cost

The most expensive part of an electric car is its battery. The price decreased from per kWh in 2010, to in 2017, to in 2019. When designing an electric vehicle, manufacturers may find that for low production, converting existing platforms may be cheaper, as development cost is lower; however, for higher production, a dedicated platform may be preferred to optimize design, and cost.

Total cost of ownership

In the EU and US, but not yet China, the total cost of ownership of recent electric cars is cheaper than that of equivalent gasoline cars, due to lower fueling and maintenance costs.

The greater the distance driven per year, the more likely the total cost of ownership for an electric car will be less than for an equivalent ICE car. The break even distance varies by country depending on the taxes, subsidies, and different costs of energy. In some countries the comparison may vary by city, as a type of car may have different charges to enter different cities; for example, in England, London charges ICE cars more than Birmingham does.

Purchase cost

Several national and local governments have established EV incentives to reduce the purchase price of electric cars and other plug-ins.

, the electric vehicle battery is more than a quarter of the total cost of the car. Purchase prices are expected to drop below those of new ICE cars when battery costs fall below per kWh, which is forecast to be in the mid-2020s.

Leasing or subscriptions are popular in some countries, depending somewhat on national taxes and subsidies, and end of lease cars are expanding the second hand market.

In a June 2022 report by AlixPartners, the cost for raw materials on an average EV rose from $3,381 in March 2020 to $8,255 in May 2022. The cost increase voice is attributed mainly to lithium, nickel, and cobalt.

Running costs

Electricity almost always costs less than gasoline per kilometer travelled, but the price of electricity often varies depending on where and what time of day the car is charged. Cost savings are also affected by the price of gasoline which can vary by location.

Environmental aspects

Electric cars have several benefits when replacing ICE cars, including a significant reduction of local air pollution, as they do not emit exhaust pollutants such as volatile organic compounds, hydrocarbons, carbon monoxide, ozone, lead, and various oxides of nitrogen. Similar to ICE vehicles, electric cars emit particulates from tyre and brake wear which may damage health, although regenerative braking in electric cars means less brake dust. More research is needed on non-exhaust particulates. The sourcing of fossil fuels (oil well to gasoline tank) causes further damage as well as use of resources during the extraction and refinement processes.

Depending on the production process and the source of the electricity to charge the vehicle, emissions may be partly shifted from cities to the plants that generate electricity and produce the car as well as to the transportation of material. The amount of carbon dioxide emitted depends on the emissions of the electricity source and the efficiency of the vehicle. For electricity from the grid, the life-cycle emissions vary depending on the proportion of coal-fired power, but are always less than ICE cars.

The cost of installing charging infrastructure has been estimated to be repaid by health cost savings in less than three years. According to a 2020 study, balancing lithium supply and demand for the rest of the century will require good recycling systems, vehicle-to-grid integration, and lower lithium intensity of transportation.

Some activists and journalists have raised concerns over the perceived lack of impact of electric cars in solving the climate change crisis compared to other, less popularized methods. These concerns have largely centered around the existence of less carbon-intensive and more efficient forms of transportation such as active mobility, mass transit and e-scooters and the continuation of a system designed for cars first.

Public opinion

A 2022 survey found that 33% of car buyers in Europe will opt for a petrol or diesel car when purchasing a new vehicle. 67% of the respondents mentioned opting for the hybrid or electric version. More specifically, it found that electric cars are only preferred by 28% of Europeans, making them the least preferred type of vehicle. 39% of Europeans tend to prefer hybrid vehicles, while 33% prefer petrol or diesel vehicles.

44% Chinese car buyers, on the other hand, are the most likely to buy an electric car, while 38% of Americans would opt for a hybrid car, 33% would prefer petrol or diesel, while only 29% would go for an electric car.

Specifically for the EU, 47% of car buyers over 65 years old are likely to purchase a hybrid vehicle, while 31% of younger respondents do not consider hybrid vehicles a good option. 35% would rather opt for a petrol or diesel vehicle, and 24% for an electric car instead of a hybrid.

In the EU, only 13% of the total population do not plan on owning a vehicle at all.

Performance

Acceleration and drivetrain design

Electric motors can provide high power-to-weight ratios. Batteries can be designed to supply the electrical current needed to support these motors. Electric motors have a flat torque curve down to zero speed. For simplicity and reliability, most electric cars use fixed-ratio gearboxes and have no clutch.

Many electric cars have faster acceleration than average ICE cars, largely due to reduced drivetrain frictional losses and the more quickly-available torque of an electric motor. However, NEVs may have a low acceleration due to their relatively weak motors.

Electric vehicles can also use a motor in each wheel hub or next to the wheels, this is rare but claimed to be safer. Electric vehicles that lack an axle, differential, or transmission can have less drivetrain inertia. Some direct current motor-equipped drag racer EVs have simple two-speed manual transmissions to improve top speed. The concept electric supercar Rimac Concept One claims it can go from in 2.5 seconds. Tesla claims the upcoming Tesla Roadster will go in 1.9 seconds.

Energy efficiency

Internal combustion engines have thermodynamic limits on efficiency, expressed as a fraction of energy used to propel the vehicle compared to energy produced by burning fuel. Gasoline engines effectively use only 15% of the fuel energy content to move the vehicle or to power accessories; diesel engines can reach on-board efficiency of 20%; electric vehicles have efficiencies of 69–72%, when counted against stored chemical energy, or around 59–62%, when counted against required energy to recharge.

Electric motors are more efficient than internal combustion engines in converting stored energy into driving a vehicle. However, they are not equally efficient at all speeds. To allow for this, some cars with dual electric motors have one electric motor with a gear optimised for city speeds and the second electric motor with a gear optimised for highway speeds. The electronics select the motor that has the best efficiency for the current speed and acceleration. Regenerative braking, which is most common in electric vehicles, can recover as much as one fifth of the energy normally lost during braking.

Cabin heating and cooling

While heating can be provided with an electric resistance heater, higher efficiency and integral cooling can be obtained with a reversible heat pump, such as on the Nissan Leaf. PTC junction cooling is also attractive for its simplicity—this kind of system is used, for example, in the 2008 Tesla Roadster.

To avoid using part of the battery's energy for heating and thus reducing the range, some models allow the cabin to be heated while the car is plugged in. For example, the Nissan Leaf, the Mitsubishi i-MiEV, Renault Zoe and Tesla cars can be pre-heated while the vehicle is plugged in.

Some electric cars (for example, the Citroën Berlingo Electrique) use an auxiliary heating system (for example gasoline-fueled units manufactured by Webasto or Eberspächer) but sacrifice "green" and "Zero emissions" credentials. Cabin cooling can be augmented with solar power external batteries and USB fans or coolers, or by automatically allowing outside air to flow through the car when parked; two models of the 2010 Toyota Prius include this feature as an option.

Safety

The safety issues of BEVs are largely dealt with by the international standard ISO 6469. This document is divided into three parts dealing with specific issues:
* On-board electrical energy storage, i.e. the battery
* Functional safety means and protection against failures
* Protection of persons against electrical hazards

Heaviness

The weight of the batteries themselves usually makes an EV heavier than a comparable gasoline vehicle. In a collision, the occupants of a heavy vehicle will, on average, suffer fewer and less serious injuries than the occupants of a lighter vehicle; therefore, the additional weight brings safety benefits (to the occupant). On average, an accident will cause about 50% more injuries to the occupants of a vehicle than those in a vehicle. Heavier cars are more dangerous to people outside the car if they hit a pedestrian or another vehicle.

Stability

The battery in skateboard configuration lowers the center of gravity, increasing driving stability, lowering the risk of an accident through loss of control. If there is a separate motor near or in each wheel, this is claimed to be safer due to better handling.

Risk of fire

Like their ICE counterparts, electric vehicle batteries can catch fire after a crash or mechanical failure. Plug-in electric vehicle fire incidents have occurred, albeit fewer per distance traveled than ICE vehicles. Some cars' high-voltage systems are designed to shut down automatically in the event of an airbag deployment, and in case of failure firefighters may be trained for manual high-voltage system shutdown. Much more water may be required than for ICE car fires and a thermal imaging camera is recommended to warn of possible re-ignition of battery fires.

Controls

, most electric cars have similar driving controls to that of a car with a conventional automatic transmission. Even though the motor may be permanently connected to the wheels through a fixed-ratio gear, and no parking pawl may be present, the modes "P" and "N" are often still provided on the selector. In this case, the motor is disabled in "N" and an electrically actuated hand brake provides the "P" mode.

In some cars, the motor will spin slowly to provide a small amount of creep in "D", similar to a traditional automatic transmission car.

When an internal combustion vehicle's accelerator is released, it may slow by engine braking, depending on the type of transmission and mode. EVs are usually equipped with regenerative braking that slows the vehicle and recharges the battery somewhat. Regenerative braking systems also decrease the use of the conventional brakes (similar to engine braking in an ICE vehicle), reducing brake wear and maintenance costs.

Batteries

Lithium-ion-based batteries are often used for their high power and energy density. Batteries with different chemical compositions are becoming more widely used, such as lithium iron phosphate which is not dependant on nickel and cobalt so can be used to make cheaper batteries and thus cheaper cars.

Range

The range of an electric car depends on the number and type of batteries used, and (as with all vehicles), the aerodynamics, weight and type of vehicle, performance requirements, and the weather. Cars marketed for mainly city use are often manufactured with a short range battery to keep them small and light.

Most electric cars are fitted with a display of the expected range. This may take into account how the vehicle is being used and what the battery is powering. However, since factors can vary over the route, the estimate can vary from the actual range. The display allows the driver to make informed choices about driving speed and whether to stop at a charging point en route. Some roadside assistance organizations offer charge trucks to recharge electric cars in case of emergency.

Longest range in 2021 was 800 km and several companies aim to reach 1000 km on a single charge in the mid-2020s.

File:BEV EPA range comparison 2020 model year USA.png, alt=Comparison of EPA-rated range for model year 2020 electric cars rated up until January 2020., Comparison of EPA-rated range for model year 2020 electric cars rated up until January 2020
File:NIO ES8 01 China 2019-04-02.jpg, NIO ES8 has a swappable battery pack.

Charging

Connectors

Most electric cars use a wired connection to supply electricity for recharging. Electric vehicle charging plugs are not universal throughout the world. However vehicles using one type of plug are generally able to charge at other types of charging stations through the use of plug adapters.

The Type 2 connector is the most common type of plug, but different versions are used in China and Europe.

The Type 1 (also called SAE J1772) connector is common in North America but rare elsewhere, as it does not support three-phase charging.

Wireless charging, either for stationary cars or as an electric road, is less common , but is used in some cities for taxis.

Home charging

Electric cars are usually charged overnight from a home charging station; sometimes known as a charging point, wallbox charger, or simply a charger; in a garage or on the outside of a house. typical home chargers are 7 kW, but not all include smart charging. Compared to fossil fuel vehicles, the need for charging using public infrastructure is diminished because of the opportunities for home charging; vehicles can be plugged in and begin each day with a full charge. Charging from a standard outlet is also possible but very slow.

Public charging

Public charging stations are almost always faster than home chargers, with many supplying direct current to avoid the bottleneck of going through the car's AC to DC converter, the fastest being 350 kW.

Combined Charging System (CCS) is the most widespread charging standard, whereas the GB/T 27930 standard is used in China, and CHAdeMO in Japan. The United States has no de facto standard, with a mix of CCS, Tesla Superchargers, and CHAdeMO charging stations.

Charging an electric vehicle using public charging stations takes longer than refueling a fossil fuel vehicle. The speed at which a vehicle can recharge depends on the charging station's charging speed and the vehicle's own capacity to receive a charge. some cars are 400 volt and some 800 volt. Connecting a vehicle that can accommodate very fast charging to a charging station with a very high rate of charge can refill the vehicle's battery to 80% in 15 minutes. Vehicles and charging stations with slower charging speeds may take as long as two hours to refill a battery to 80%. As with a mobile phone, the final 20% takes longer because the systems slow down to fill the battery safely and avoid damaging it.

Some companies are building battery swapping stations, to substantially reduce the effective time to recharge. Some electric cars (for example, the BMW i3) have an optional gasoline range extender. The system is intended as an emergency backup to extend range to the next recharging location, and not for long-distance travel.

Sweden is planning to open the first permanent electric vehicle charging road by 2025. By early 2023, the chosen charging technology is expected to be announced. A standard for ground-level power supply electric roads is expected to be published by 14 November 2022.

Vehicle-to-grid: uploading and grid buffering

During peak load periods, when the cost of generation can be very high, electric vehicles with vehicle-to-grid capabilities could contribute energy to the grid. These vehicles can then be recharged during off-peak hours at cheaper rates while helping to absorb excess night time generation. The batteries in the vehicles serve as a distributed storage system to buffer power.

Lifespan

As with all lithium-ion batteries, electric vehicle batteries may degrade over long periods of time, especially if they are frequently charged to 100%; however, this may take at least several years before being noticeable. A typical warranty is 8 years or , but they usually last much longer, perhaps 15 to 20 years in the car and then more years in another use.

Currently available electric cars

Highway capable

Tesla became the world's leading electric vehicle manufacturer in December 2019. Its Model S was the world's top selling plug-in electric car in 2015 and 2016, ''See also detailed 2016 sales and cumulative global sales in the two graphs.'' and its Model 3 has been the world's best selling plug-in electric car for four consecutive years, from 2018 to 2021. "Global sales totaled 3,124,793 plug-in passenger cars in 2020, with a BEV to PHEV ratio of 69:31, and a global market share of 4%. The world's top selling plug-in car was the Tesla Model 3 with 365,240 units delivered, and Tesla was the top selling manufacturer of plug-in passenger cars in 2019 with 499,535 units, followed by VW with 220,220." "Global sales totaled 2,018,247 plug-in passenger cars in 2018, with a BEV:PHEV ratio of 69:31, and a market share of 2.1%. The world's top selling plug-in car was the Tesla Model 3, and Tesla was the top selling manufacturer of plug-in passenger cars in 2018, followed by BYD." The Tesla Model 3 surpassed the Leaf in early 2020 to become the world's cumulative best selling electric car. Tesla produced its 1 millionth electric car in March 2020, becoming the first auto manufacturer to do so, and in June 2021, the Model 3 became the first electric car to pass 1 million sales. Tesla has been listed as the world's top selling plug-in electric car manufacturer, both as a brand and by automotive group for four years running, from 2018 to 2021. "Tesla led plug-in car sales among automotive groups in 2019, with 367,849 units delivered, followed by BYD with 225,757, and the Renault-Nissan Alliance with 183,299. Accounting just for the all-electric segment (1.6 million electric cars sold in 2019), again Tesla was the leader, followed by BAIC (163,838), BYD (153,085), the Renault-Nissan Alliance (132,762), and SAIC (105,573)." "Tesla led plug-in car sales among automotive groups in 2018, with 245,240 units delivered, followed by BYD with 229,338, and the Renault-Nissan Alliance with 192,711." ''The global share of plug-in electric cars by brand in 2018 was led by Tesla with 12%, followed by BYD with 11%, BMW with 9%, BAIC with 6%, and Roewe and Nissan, both with 5%.'' At the end of 2021, Tesla's global cumulative sales since 2012 totaled 2.3 million units, with 936,222 of those delivered in 2021. See table "Operational Summary" pp. 7 and 8 for revised and final production and sales numbers.

, the Renault–Nissan–Mitsubishi Alliance is listed as one of the world's leading all-electric vehicle manufacturers, with global all-electric vehicle sales totaling over 1 million light-duty electric vehicles, including those manufactured by Mitsubishi Motors

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