The GMC Hummer EV is heavy, 9,063 pounds to be exact (and it can still wheelie). Part of the reason for that massive weight is the battery, which features an almost military-like type of protection to prevent any disasters from occurring on the road or in the wild. Like it should be.
The battery itself weighs 2,923 pounds, or nearly 1.5 tons. It takes a huge amount of juice to allow the vehicle’s Ultium drive motors to power its advertised and recently tested 1,000 horsepower in WTF mode. The Hummer EV battery consists of 24 modules and a parallel cooling system to ensure consistent temperatures and deter overheating. The system is wired in parallel on a 400 volt circuit. This circuit can then be manipulated to mimic an 800-volt circuit capable of accommodating 350kW of juice when fast charging. This in turn provides the claimed 329 miles of range. This figure is not rated by the EPA and likely won’t be because its over 9,000 pound curb weight qualifies it as a medium duty truck, which the EPA does not need to rate, so this will not be the case. GMC still places the lineup on the Monroney label for customer assurance anyway.
In an effort to ensure that the Chevy Bolt fires are nothing more than a permanent memory, General Motors did their due diligence in keeping the Hummer EV’s batteries heavily fortified. Several layers of metal act as a protective shield from the outside world.
By The reader, the outer layer is a solid steel plate that houses the battery and components. You can add an extra steel plate to this outer layer when upgrading to the Extreme Off-Road Pack. Inside this plate there are layers of metal channeled perpendicular to each other for added rigidity and strength. At the innermost level, there are structural metal frames that keep the modules separate. The cases themselves are assembled in Michigan with help from Magna International. Breaking through all that armor should theoretically be done by dropping the entire truck onto a “hardened steel spike,” engineers say.
The Hummer EV is tasked with showcasing unprecedented amounts of groundbreaking General Motors technologies, which will also find their way onto larger trucks and SUVs like the Chevrolet Silverado EV and GMC Sierra EV. To say it’s the most important vehicle GM has built in decades is no exaggeration, and that’s probably why they made a documentary about it.