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A vehicle underbody including a rear underbody structure, a rear differential, a sub-frame, and a traction battery is provided. The rear differential is mounted to the rear underbody structure. The sub-frame is mounted to the rear underbody structure rearward of the rear differential. The traction b

A vehicle underbody including a rear underbody structure, a rear differential, a sub-frame, and a traction battery is provided. The rear differential is mounted to the rear underbody structure. The sub-frame is mounted to the rear underbody structure rearward of the rear differential. The traction battery is mounted between the rear underbody structure and the sub-frame. A base portion of the traction battery defines a base portion plane that does not extend through the rear differential. The sub-frame may include at least two reinforcement members each having a ramp-shaped end extending toward the rear differential. The sub-frame may include a rear lateral member and a trailer hitch mount extending rearwardly therefrom. One of the reinforcement members and the trailer hitch mount may be aligned in parallel with a central longitudinal axis defined by the rear underbody structure.

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1. A vehicle underbody assembly comprising: a rear underbody structure;a first sub-frame mounted to the rear underbody structure;a vehicle component mounted to the first sub-frame;a second sub-frame mounted to the rear underbody structure at a location adjacent the first sub-frame and including at l

1. A vehicle underbody assembly comprising: a rear underbody structure;a first sub-frame mounted to the rear underbody structure;a vehicle component mounted to the first sub-frame;a second sub-frame mounted to the rear underbody structure at a location adjacent the first sub-frame and including at least one reinforcement member extending toward the vehicle component, a first lateral member, a second lateral member, a pair of angle members extending between the first lateral member and the second lateral member, a trailer hitch mount extending rearward from the second lateral member, and a cross member extending between the pair of angle members; anda traction battery mounted to the second sub-frame adjacent the vehicle component and below the rear underbody structure,wherein the at least one reinforcement member is oriented to contact the vehicle component or first sub-frame when a force moves the second sub-frame forward, and wherein the cross member is spaced from the first lateral member to support a portion of the traction battery. 2. The assembly of claim 1, wherein the at least one reinforcement member is further aligned with the vehicle component so the force directs the traction battery to move above the vehicle component. 3. The assembly of claim 1, wherein an end of the at least one reinforcement member located adjacent the vehicle component is ramp-shaped. 4. The assembly of claim 1, wherein the vehicle component is one of a rear differential, a fuel tank, and a portion of a suspension assembly. 5. The assembly of claim 1, wherein the at least one reinforcement member is square-shaped and extends forward of the traction battery. 6. A vehicle assembly comprising: an underbody including a central longitudinal axis;a rear differential mounted to the underbody;a sub-frame mounted to the underbody rearward of the differential and including angle members extending from a lateral member at twenty-five to forty degrees relative to the axis;a trailer hitch mount extending from the lateral member; anda traction battery mounted between the underbody and sub-frame defining a plane that does not extend through the differential. 7. The assembly of claim 6, wherein the sub-frame includes at least two reinforcement members each having a ramp-shaped end extending toward the differential or a rear axle. 8. The assembly of claim 7, wherein one of the reinforcement members and the trailer hitch mount are aligned in parallel with the axis. 9. The assembly of claim 6, wherein the lateral member is a rear lateral member, wherein the sub-frame further includes a cross member extending between the angle members and a forward lateral member, wherein the angle members extend between the forward lateral member and the rear lateral member, and wherein the cross member is located rearward of first and second wheel wells defined by the underbody. 10. The assembly of claim 6, wherein the sub-frame includes a reinforcement member having a square shape extending forward of the traction battery. 11. A vehicle underbody assembly comprising: a rear body structure;a first sub-frame mounted to the rear body structure;a rear differential mounted to the first sub-frame;a second sub-frame mounted to the rear body structure rearward of the first sub-frame and including a first lateral member, a second lateral member, a pair of angle members extending between the first lateral member and the second lateral member, a cross member extending between the pair of angle members, and a trailer hitch mount extending rearward from the second lateral member; anda traction battery mounted to the first lateral member between the rear body structure and the second sub-frame,wherein the first lateral member is arranged with the first sub-frame so the traction battery is mounted upon a plane extending horizontally along an axis vertically spaced above the first sub-frame. 12. The assembly of claim 11, wherein the second sub-frame further includes at least one reinforcement member extending forward from the first lateral member and oriented for contact with the rear differential when a force influences the first lateral member toward the first sub-frame. 13. The assembly of claim 12, wherein the at least one reinforcement member is ramp-shaped and extends from the first lateral member so that the ramp shape directs the traction battery above the rear differential when the at least one reinforcement member contacts the rear differential. 14. The assembly of claim 12, wherein the at least one reinforcement member and the trailer hitch mount are aligned in parallel with a central longitudinal axis defined by the rear body structure. 15. The assembly of claim 11, wherein the traction battery includes a base portion defining the plane that does not extend through the rear differential. 16. The assembly of claim 11, wherein the second sub-frame further includes at least one reinforcement member extending forward of the traction battery and having a square shape.