Support structures for vehicle underbody mounted battery packs

1. An electrified vehicle assembly, comprising:

a frame including a passenger side rail and a driver side rail;

a battery support plate secured to the passenger side rail and the driver side rail;

a battery pack including a plurality of cross-members;

a plurality of mechanical fasteners that each extend through an aperture in the battery support plate to engage one of the cross-members to secure the battery pack to the battery support plate; and

an enclosure assembly of the battery pack, the enclosure assembly housing the plurality of cross-members, the enclosure assembly including a tray, wherein the plurality of mechanical fasteners each extend through an aperture in the tray to engage the one of the cross-members.

2. The electrified vehicle assembly of claim 1 , wherein the battery pack is supported relative to the frame by the battery support plate.

3. The electrified vehicle assembly of claim 1 , wherein at least a portion of the battery pack is positioned between the passenger side rail and the driver side rail.

4. The electrified vehicle assembly of claim 1 , wherein the battery support plate is a completely separate component from the enclosure assembly of the battery pack.

5. The electrified vehicle assembly of claim 1 , wherein the plurality of cross-members extend longitudinally in a cross-vehicle direction.

6. The electrified vehicle assembly of claim 1 , wherein the plurality of mechanical fasteners threadably engage the cross-members.

7. The electrified vehicle assembly of claim 1 , further comprising a plurality of isolators, the plurality of mechanical fasteners each extending through one or more of the plurality of isolators.

8. The electrified vehicle assembly of claim 1 , further comprising at least two jacking pad cutouts opening to a passenger side of the battery support plate, and at least two jacking pad cutouts opening to a driver side of the battery support plate.

9. The electrified vehicle assembly of claim 1 , wherein the plurality of mechanical fasteners are a plurality of first mechanical fasteners, and further comprising a plurality of second mechanical fasteners that each extend through an aperture in the battery support plate to engage the passenger side rail or the driver side rail.

10. The electrified vehicle assembly of claim 9 , wherein the plurality of second mechanical fasteners are bolts configured to threadably engage nuts disposed within an interior of the passenger side rail or the driver side rail.

11. An electrified vehicle assembly, comprising:

a frame including a passenger side rail and a driver side rail;

a battery support plate secured to the passenger side rail and the driver side rail;

a battery pack including a plurality of cross-members;

a plurality of mechanical fasteners that each extend through an aperture in the battery support plate to engage one of the cross-members to secure the battery pack to the battery support plate, wherein the battery support plate includes a rib projecting vertically downward beneath all portions of the plurality of mechanical fasteners that engage the one of the cross-members, the rib extending longitudinally in a cross-vehicle direction; and

a raised area that extends longitudinally through the rib in a direction that is angled relative to the cross-vehicle direction.

12. The electrified vehicle assembly of claim 11 , wherein, with reference to an orientation of a vehicle having the battery support plate, the rib is forward of the plurality of mechanical fasteners that engage the cross-member.

13. A method, comprising:

mounting a battery support plate to a battery pack;

mounting the battery support plate to both a passenger side rail and a driver side rail of a frame of an electrified vehicle, thereby supporting the battery pack relative to the frame; and

inserting a plurality of fasteners through respective apertures in the battery support plate to engage a respective cross-member within the battery pack,

wherein mounting the battery support plate to the passenger side rail and the driver side rail includes:

inserting a plurality of fasteners through respective apertures in the battery support plate to engage the passenger side rail or the driver side rail.

14. The method as recited in claim 13 , wherein mounting the battery support plate to the frame further includes inserting the plurality of fasteners through respective isolators, and inserting the plurality of fasteners through respective apertures within an enclosure tray of the battery pack.