TheChevrolet Volt is aplug-in hybrid andextended-range electric vehicle car that was manufactured byGeneral Motors, and also marketed inrebadged variants as theHolden Volt in Australia and New Zealand and theBuick Velite 5 in China, and with a differentfascia as theVauxhall Ampera in the United Kingdom and as theOpel Ampera in the remainder of Europe. Volt production ended in February 2019.
Sales of the 2011 Volt began in the United States in mid-December 2010, followed by some European countries and other international markets in 2011. Global combined Volt/Ampera-family sales totaled about 177,000 units by the end of October 2018. The U.S. was the leading market, with 157,054 Volts delivered through the end of 2019, followed by Canada with 16,653 Volts sold through September 2018. Just over 10,000 Opel/Vauxhall Ampera cars had been sold in Europe as of June 2016[update]. Until December 2018, the Volt/Ampera family of vehicles was the world's bestselling plug-in hybrid vehicle. When it was discontinued, the Chevrolet Volt was still listed as the top-selling plug-in hybrid in the American market.
The Volt operates as a purebattery electric vehicle until its battery capacity drops to a predetermined threshold from full charge. From there, itsinternal combustion engine powers an electricgenerator to extend the vehicle's range as needed. While running on gasoline at high speeds the engine may be mechanically linked (by a clutch) to agenerator set, improving efficiency by 10% to 15%. The Volt'sregenerative braking also contributes to the on-board electricity generation. Under theUnited States Environmental Protection Agency (EPA) cycle, the 2013–15model year Voltall-electric range is 38 mi (61 km), with a combined electric mode/gasoline-only rating of 62 mpg‑US (3.8 L/100 km; 74 mpg‑imp)equivalent (MPG equivalent).
Thesecond-generation Volt's improved battery system and drivetrain increased the all-electric range to 53 miles (85 km), its EPA-rated fuel economy incharge-sustaining mode to 42 mpg‑US (5.6 L/100 km; 50 mpg‑imp), and the combined city/highway fuel economy inall-electric mode to 106 MPG-e, up from 98 MPG-e. Deliveries to retail customers in the U.S. and Canada began in October 2015 as a 2016model year.
The production design model officially unveiled on September 16, 2008, as part of General Motors (GM) centennial celebration at theWintergarden headquarters in Detroit.[1] The production model differed greatly in design from the original concept car. The carmaker cited necessaryaerodynamic changes needed to reduce the concept car's highdrag coefficient ofCd=0.43[2] down toCd=0.28,[3] still higher than theToyota PriusCd=0.25. Another reason was the use of General Motors's new global compact vehicle platformDelta II to keep costs reasonable, and shared with the 2010 model yearChevrolet Cruze.[4] Another significant difference from the concept car was the seating, as the production Volt seats four rather than five passengers. This change was due to the higher-than-usual central tunnel that runs from the front console to the rear seat that houses the car's T-shaped battery pack.[5]
After the concept was put into the pipeline for production, GM began looking for a partner to develop the Volt'slithium-ion battery pack. The carmaker evaluated about 25battery cell chemistries and constructions from around two dozen lithium-ion battery makers around the world.[6] Due to their more promising cell technologies, two companies were selected in June 2007,Compact Power (CPI), which uses a lithium manganese oxide (LiMn2O4) cell made by its parent company,LG Chemical; andContinental Automotive Systems, which useslithium iron phosphate basedcylindrical cells made byA123Systems.[6][7][8] By the end of October 2007 CPI (LG Chem) delivered their finished battery packprototypes, and A123 delivered theirs by January 2008. GM's testing process was conducted at the laboratory the carmaker had created for theGM EV1 program. The battery packs included monitoring systems designed to keep the batteries cool and operating at optimum capacity despite a wide range of ambient temperatures.[6][8] To ensure the battery pack would last 10 years and 150,000 miles (240,000 km) expected for the battery warranty, the Volt team decided to use only half of the16 kWh capacity to reduce the rate of capacity degradation, limiting the state of charge (SOC) up to 80% of capacity and never depleting the battery below 30%.[8][9] GM also expected the battery to withstand 5,000 full discharges without losing more than 10% of its charge capacity.[8] According to GM, as of August 2016[update], no batteries had been changed due to degradation.[10]
In April 2008 GM started extensive battery testing. In two years, the carmaker put the battery packs to the equivalent of 150,000 real-world miles (240,000 km) and 10 years of use.[8] The durability of the battery pack was tested for a broad range of extreme ambient conditions including ashaker table to simulate potholes and a thermal chamber, to simulate temperatures varying from 116 °F (47 °C), typical of theSouthwest deserts, to −40 °F (−40 °C) typical of the Alaskantundra.[6] In April 2008 the lithium-ion battery pack was placed inChevrolet Malibus fitted with the Volt powertrain to be used as test mules for further real-world testing.[8][11] In October 2008, GM chose CPI (LG Chemical) to provide the battery systems for the first production version of the Volt.[12][13] In July 2008, GM confirmed that a non-turbocharged, 1.4 L 4-cylinder engine would be used as the range extender, and that the intention was to build it inFlint, Michigan.[14] In April 2009, General Motors let journalists test the Volt powertrain without the range-extending generator in the body ofChevrolet Cruze sedans that GM used astest mules at theGM Technical Center inWarren, Michigan.[15]
The firstpre-production test car based on the final Volt design was built in June 2009, in Warren, Michigan,[16][17] and by October 2009, 80 Volts had been built and were tested under various conditions.[17][18] On March 31, 2010, the first factory-built Volt was produced at theDetroit Hamtramck Assembly Plant to test theproduction line and for quality control purposes, both of the tooling and the pre-production vehicles produced before regular production began.[19][20]
Tony Posawatz was the Volt Vehicle Line Director from 2006 to 2012,[21] and he was known as employee #1 and led the team from concept to production.[22]
Final production vehicle, the 2011 Chevrolet Volt
General Motors held a ceremony at its Detroit Hamtramck Assembly Plant on November 30, 2010, to introduce the first Chevrolet Volt off the assembly line. The first Volt built for retail sale was earmarked for display at GM's Heritage Center museum inSterling Heights, Michigan.[23] The second unit was offered at a public auction, with an opening bid ofUS$50,000 and it was won byRick Hendrick who paidUS$225,000. The proceeds went to fund mathematics and sciences education in Detroit through the Detroit Public Schools Foundation.[24] Deliveries to retail customers in the United States began in mid December 2010.[25] Volt deliveries began in Canada in September 2011.[26][27] The first deliveries of the Chevrolet Volt in Europe took place in November 2011.[28][29] The European version of the Volt, the Opel Ampera, was released to retail customers in Europe in February 2012.[30] Deliveries of the right-hand drive Vauxhall Ampera in the UK began in May 2012.[28] The Holden Volt was released in Australia in December 2012.[31]
The second generation Chevrolet Volt was unveiled at the January 2015North American International Auto Show.[32] Retail deliveries began in the United States and Canada in October 2015 as a 2016model year, with 1,324 units delivered in the U.S. that month.[33][34] Availability in the American market was limited to California and the other 10 states that followCalifornia's zero emission vehicle regulations. GM scheduled the second generation as a 2017 model year to be released in the 39 remaining states by early 2016.[33] Manufacturing of the 2017 MY Volt began in February 2016, and the first units arrived at dealerships at the end of February 2016. The 2017 model complied with stricter Tier 3 emissions requirements and was available nationwide.[35]
The second generation Volt had an upgraded powertrain with a 1.5-liter engine that uses regular gasoline; the 18.4kWh battery pack had new chemistry that stored 20% more electrical energy using fewer cells, 192 compared with 288 on the 2014 Volt. It had a new power controller that was integrated with the motor housing; the electric motors weighed 100 lb (45 kg) less and used smaller amounts ofrare earth metals. GM engineers explained that the second generation Volt was developed with extensive input from Volt owners.[32][36][37]
The improvements allowed the 2016 Volt to deliver better EPA ratings than the first generation model. The all-electric range was rated at 53 mi (85 km), up from 38 mi (61 km) attained by the 2015 Volt. The gains in efficiency allowed the second generation to improve its combined fuel economy in gasoline-only (charge-sustaining) mode to 42 mpg‑US (5.6 L/100 km; 50 mpg‑imp), up from 37 mpg‑US (6.4 L/100 km; 44 mpg‑imp) for the previous model. The second generation rating for combined city/highway fuel economy in all-electric mode was 106miles per gallon gasoline equivalent (MPGe; 2.2Le/100km), up from 98MPGe (2.4Le/100km) for the 2015 first generation model.[38][39] The combined gasoline-electricity fuel economy rating of the 2016 model year Volt was 77 mpg‑US (3.1 L/100 km; 92 mpg‑imp)equivalent, 82MPGe (2.9Le/100km) in city driving and 72MPGe (3.3Le/100km) in highway.[40] Both the all-electric range and fuel economy ratings are the same for the 2017 model year Volt.[41]
The second-generation Volt seats five rather than four, as in the first generation.
Second generationVoltec 1.5L gasoline-powered engine (left) and power inverter on top of the traction electric motor (right).
In April 2013, CEODaniel Akerson announced that GM expected the second generation Volt to be priced on the order ofUS$7,000 toUS$10,000 lower than the 2013 model year with the same features.[42] The 2016 Volt pricing started atUS$33,170 before anygovernment incentives, plusUS$825 for destination. The starting price wasUS$1,175 lower than the 2015 Volt.[43] In California, order books for the second generation Volt were opened on May 28, 2015.[44]
In July 2014, Opel announced that due to a slowdown in sales, they would discontinue the Ampera after the launch of the second generation Volt—and that between 2014 and 2018, Opel planned to introduce a successor electric vehicle in Europe.[45] General Motors announced in February 2016 that the all-electricOpel Ampera-e hatchback would go into production in 2017. This is the European version of theChevrolet Bolt EV.[46][47]
In April 2015, General Motors confirmed that it would not build the second-generation Volt inright-hand-drive configuration. Only 246 units had been sold in Australia by mid-April 2015, and the Holden Volt was discontinued once the remaining stock was sold.[48]
2011Motor Trend Car of the Year. The magazine commented that "In the 61-year history of the Car of the Year award, there have been few contenders as hyped – or as controversial – as the Chevrolet Volt."[52]
2011Green Car of the Year by Green Car Journal. The magazine editors explained that "This award welcomes a new genre of mass-production electric vehicles to the consumer market, with the Volt as the first-ever electric vehicle to take top prize."[53]
2011 Automobile of the Year byAutomobile Magazine. The editors commented that the Volt "...is genuinely an all-new car, in the most simplistic sense as well as in the greater notion that the Volt is unlike any vehicle we have ever driven."[54]
2011 The Volt ranked first in Consumer Reports' list of owner-satisfaction based on its 2011 Annual Auto Survey, with 93% respondents who owned the Volt saying they definitely would purchase that same vehicle again. The magazine noted that the Volt had been on sale for just a few months at the time of the survey, and also clarified that the survey took place before the National Highway Traffic Safety Administration investigation regarding the Volt's battery fire risk.[62][63]
2012 Total Cost of Ownership Award in the electric car category, granted by Kelley Blue Book for the lowest projected costs during the initial five-year ownership period in its category.[64]
2012 The Volt ranked first, for the second year in a row, in Consumer Reports' list of owner-satisfaction based on its 2012 Annual Auto Survey, with 92% respondents who owned the Volt saying they definitely would purchase that same vehicle again.[65]
2016 Green Car of the Year by Green Car Journal (awarded to thesecond generation Volt). The Chevrolet Volt is the first model to receive this award more than once.[66]
2012International Engine of the Year Award in the category of Green Engine, shared by the Opel Ampera and the Chevrolet Volt for their 1.4 L engine-based extended-range electric powertrain.[69][70]
European organizations
2011 Overall Winner ofWhat Car? Green Awards, granted by the UK magazine to the Vauxhall Ampera.[71]
2011Top Gear's "Green Car of the Year 2011" to the Vauxhall Ampera.[72]
2012 Car of the Year inDenmark. In October 2011, 18 Danish motor journalists chose the Opel Ampera as "Car of the Year 2012" by a wide margin, despite being more expensive than the family cars the award usually goes to.[73][74]
2012European Car of the Year, shared by the Chevrolet Volt and the Opel/Vauxhall.[75] The Ampera/Volt became the first car developed in the U.S. to win this European award.[76][77]
2013 Green Mobility Trophy. Readers ofAuto Zeitung in Germany awarded the Opel Ampera the trophy and named the mid-size sedan the best electric vehicle.[78]
Rest of the world organizations
2012 Drive's Green Innovation Award to the Holden Volt, as part of the Australia's Drive Car of the Year Awards.[79]
^U. S. Environmental Protection Agency andU.S. Department of Energy (December 4, 2015)."Fueleconomy.gov's Top Fuel Sippers (EPA Ratings, All Years)". fueleconomy.gov. RetrievedDecember 5, 2015.Excludes all-electric vehicles. Click on the tab "Top Fuel Sippers (EPA Ratings, All Years)" – The 2013–2014 Chevrolet Volt has a combined fuel economy of 62MPGe (3.8Le/100km), while 2016 Volt has a combined fuel economy of 77MPGe (3.0Le/100km). The BMW i3 REx has a combined fuel economy of 88MPGe (2.7Le/100km)
Edsall, Larry (2010). Endres, Chris (ed.).Chevrolet Volt: Charging into the Future. Foreword byBob Lutz (Hardcover ed.). Minneapolis, Minnesota:Motorbooks.ISBN978-0-7603-3893-3.
2012 Chevrolet Volt Owner Manual(PDF) (First printing ed.). United States: General Motors. 2011. Part no. 20819515 A. Archived fromthe original(PDF) on October 20, 2013. RetrievedOctober 20, 2013. -->
