Trickle Charged: Chevrolet Reveals More Details About Bolt’s Electric Drivetrain – Car and Driver (blog)

2017 Chevrolet Bolt EV Cutaway

2017 Chevrolet Bolt EV Cutaway

Given Tesla’s recent, high-visibility prove to of its upcoming 2018 Model 3 sedan, it’s probably a lot more compared to coincidence that, just days later, GM available a glimpse in to the workings of its 2017 Chevrolet Bolt EV. While the General didn’t launch anything Earth-shatteringly brand-new regarding the all-electric Bolt at its battery lab in Warren, Michigan, it’s clear that the Model 3 will certainly have actually a formidable competitor currently in the marketplace as soon as it ultimately arrives.

Insight in to the Chevy Bolt’s technology has actually come in bits and pieces as the vehicle’s on-sale date approaches at the end of 2016, from its reveal as a tip in 2015, to a prototype drive in January, to an overview of its electric guts at this year’s Detroit auto show. It’s becoming clear that the Bolt will certainly supply its own compelling case as a five-seat electric hatchback along with at the very least 200 miles of range and a fee of $37,500 prior to the government’s $7500 tax credit is applied. While the EPA has actually yet to certify the Bolt’s range, GM confirmed that the car’s electric drive unit (200 horsepower, 266 lb-ft of torque, 7.05:1 last drive ratio) will certainly be sufficient to scoot the 3580-pound EV to 60 mph in under 7.0-seconds.

2017 Chevrolet Bolt EV drive unit

2017 Chevrolet Bolt EV drive unit

The Bolt’s 60-kWh lithium-ion battery weighs 960 pounds and is a stressed member of the car’s BEV II chassis, enhancing torsional rigidity by nearly 30 percent. GM says the group was made to last for the life of the car, that it will certainly carry an eight-year/100,000-mile warranty, and—as along with the second-generation Chevy Volt—the battery will certainly be serviceable by dealers as necessary. A few of the pack’s accessory components have actually also been fitted under the front hood for much easier access and optimum space efficiency. Due to the fact that the underfloor battery was engineered specifically for the Bolt’s arduous duty cycle, its 288 prismatic cells have actually higher nickel content and will certainly run slightly warmer compared to those in the Volt or the Chevy Spark EV.

2017 Chevrolet Bolt EV battery cutaway

2017 Chevrolet Bolt EV battery cutaway

However, an integrated, liquid-cooling tray—circulating 6.9 liters of Dex-Cool coolant—ought to maintain thermal overloads at bay. The group additionally has actually a divide heating element for warm-ups in colder climates, also as an automatic shut-off relay integrated in to its wiring for emergencies. Greg Smith, GM’s engineering group manager of electrification, says that the battery will certainly make use of a lot more of its offered power per charge compared to the Volt’s, and that throughout its progression has actually revealed minimal variation in output in harsh hot and cold temperatures. As along with the Bolt’s integrated electric motor-gearbox, GM oversaw the engineering for the battery pack, however supplier LG Chem will certainly in fact make the two the battery and drivetrain in Korea prior to shipment to the last assembly plant in Lake Orion, Michigan. (The Warren battery plant makes packs for Chevy’s Volt, Spark EV and the Malibu Hybrid, also as the upcoming Cadillac CT6 PHEV.)



Unlike Tesla, which has actually revealed couple of details regarding the Model 3’s inner workings, GM asserts that the Bolt’s battery can easily be fully recharged in nine hrs utilizing a 240-volt AC outlet; up to 90 miles of range can easily be replenished in 30 mins utilizing a DC quick charger. Exactly what GM wouldn’t confirm, however, was whether the front-drive Bolt will certainly ultimately be equipped to suit Tesla’s Autopilot semi-autonomous technology or its optional, dual-motor, all-wheel-drive setup. however along with Model 3 deliveries still much off on the EV horizon, GM has actually plenty of time to job on details prior to it faces showroom competition.

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