In response to growing demand for more fuel efficient vehicles, the Chevrolet Volt concept car was introduced at the 2007 North American International Auto Show. This extended range electric vehicle (EREV) combines the benefits of an electric car with the driving range of a gasoline powered vehicle. The Volt is one of many variants from the global compact architecture. This paper will describe the strategies used for creating the all new upper structure design that interfaced with the global compact lower architecture to create the unique Volt body. As with all hatchback vehicles, the rear structure required a design solution that would meet torsional stiffness requirements while maintaining a large opening for the liftgate. This paper will also discuss the design solutions which used geometry and high strength materials to meet IIHS roof strength and crash performance objectives while maintaining a low mass solution.

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