General Motors BT1 platform

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GM BT1 platform
File:2022 GMC Hummer EV front.jpg
GMC Hummer EV, the first vehicle based on the BT1 platform
Overview
Manufacturer General Motors
Production 2021–present
Body and chassis
Layout Dual- & triple-motor, all-wheel-drive
Related GM BEV3

The GM BT1 platform is a dedicated electric vehicle architecture or platform developed by General Motors (GM). It underpins electric full-size pickup trucks and SUVs sold by GM, using battery and motor technology developed under its Ultium program; these are shared with third-generation GM electric vehicles on the BEV3 platform. BT1 is categorized as a skateboard platform.

History

In October 2019, GM made an agreement with the United Auto Workers (UAW) union to invest US$3 billion in Detroit/Hamtramck Assembly over the next four years, renaming it to "Factory Zero" and converting it to a factory for electric trucks and vans.[1] The UAW's copy of the agreement revealed the "centerpiece" of the investment was a program internally called "Project O" or BT1, which would develop and begin selling a low-volume pickup truck by 2021, aimed at the high end of the market.[2]

The same platform developed for that project, which resulted in the GMC Hummer EV,[3] also would be used for electric versions of full-size General Motors pickup trucks (Chevrolet Silverado / GMC Sierra) and SUVs (Chevrolet Tahoe / Suburban, GMC Yukon, and Cadillac Escalade).[4]

Design

The BT1 platform is designed for full-size trucks and SUVs which currently use a body-on-frame architecture, while unibody passenger cars and crossover utility vehicles will be based on BEV3; both platforms use Ultium batteries and motors.[5] However, Nichole Kraatz, the GM chief engineer for battery electric trucks, characterized BT1 as "not a unibody and ... not a body-on-frame", as the body has an integral floor, like a unibody, but rests on the battery structure, which also acts as a structural member.[6] This confirmed early speculation published in 2019.[7]

Despite its name suggesting a relation to the T1 platform,[4] BT1 shares no parts with the older internal combustion engine full-size pickup truck and SUV platform.[8]

As implemented for the GMC Hummer EV, BT1 has a stamped and welded steel battery case with 24 modules, totaling 246 kW-hr gross, of which 212 kW-hr are usable; the total weight of the battery alone is 2,800 lb (1,300 kg).[9]

Applications

Current models

  • GMC Hummer EV.jpg

    GMC Hummer EV (SUT)

  • 2024 GMC Hummer EV VUS au SIAM 2023.JPG

    GMC Hummer EV (SUV)

  • 2024 Chevrolet Silverado EV RST, NYIAS 2022.jpg

    Chevrolet Silverado EV

Future models

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See also

References

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