BODY STRUCTURE FOR AN ELECTRICALLY OPERATED VEHICLE

Abstract

A body structure for an electrically operated vehicle has an installation space for a traction battery which is downwardly open in the vehicle vertical direction and upwardly delimited by a floor sheet-metal part forming the vehicle floor. The traction battery is inserted into the installation space from below the vehicle. A free installation gap is formed between a battery ceiling wall and the floor sheet-metal part and a spacer is supported between the battery ceiling wall and the floor sheet-metal part. The spacer is formed in two parts, namely, a buffer made from an elastic, flexible, soft component and a base made of a component-stiff hard component. In an undeformed production state, the installation height of the spacer is greater than the gap size of the installation gap. In an installation position, the spacer is supported between the floor sheet-metal part and the battery ceiling wall, elastically deforming the buffer.

Claims

1-9. (canceled)

10. A body structure for an electrically operated vehicle, the body structure comprising: a structure defining an installation space for a traction battery, said installation space being downwardly open in a vertical direction of the vehicle and being upwardly delimited by a floor sheet-metal part forming a vehicle floor; a traction battery inserted into said installation space from underneath the vehicle, forming a free installation gap between a battery top wall of said battery and said floor sheet-metal part; and at least one spacer disposed between said battery top wall and said floor sheet-metal part, said spacer being formed of at least two components, being a buffer of an elastically resilient soft component and a base of a rigid hard component, and wherein, in an undeformed production state, an overall height of said spacer is greater than a size of said installation gap and, in an installed position, said spacer is supported between said floor sheet-metal part and said battery top wall and said buffer is elastically deformed.

11. The body structure according to claim 10, wherein said elastically resilient component is a relatively soft component and said rigid component is a relatively hard component.

12. The body structure according to claim 10, wherein said spacer is fixedly attached to said battery top wall via an adhesive connection, with an adhesive surface of said base being adhesively bonded to said battery top wall via an adhesive layer.

13. The body structure according to claim 10, which further comprises at least one stiffening bead formed in said battery top wall, said stiffening bead having a bead base which is set back by a bead height from a top wall base portion towards a battery interior, and wherein said bead base is in force-transmitting contact with a stiffening structure inside said battery, and, in order to provide a vertical load path from said floor sheet-metal part via said spacer, said battery top wall, and into said stiffening structure inside said battery, said spacer base is formed with a supporting contour configured for supporting said spacer on said bead base.

14. The body structure according to claim 13, wherein said supporting contour of said spacer is supported in loose contact on said bead base of said stiffening bead, and said base adhesive surface is offset with respect to said base supporting contour by an amount of offset, and/or said base adhesive surface is supported laterally outside said stiffening bead on said top wall base portion.

15. The body structure according to claim 14, wherein said supporting contour of said spacer is supported on said bead base of said stiffening bead without an adhesive or screw connection.

16. The body structure according to claim 13, wherein one or more of the following is true: said stiffening bead is impressed into said top wall base portion from above relative to the vehicle; said stiffening bead extends in a vehicle transverse direction as far as a lateral edge of said battery top wall; said stiffening bead is open to outside the vehicle in the vehicle transverse direction; to enable water or dirt collected in said stiffening bead to be discharged to outside the vehicle in the vehicle transverse direction in a discharge direction.

17. The body structure according to claim 16, wherein said base supporting contour is supported on said bead base while forming a passage that is open in the discharge direction.

18. The body structure according to claim 17, wherein said base supporting contour is formed with two supporting ribs which are supported on said bead base and between which said open passage is formed.

19. The body structure according to claim 13, wherein said stiffening bead is channel-shaped in a profile cross section, with two bead walls rising from said bead base and merging at transition edges into a planar said top wall base portion.

20. The body structure according to claim 19, wherein, transversely to the bead longitudinal direction and on both sides thereof, said base supporting contour merges into said base adhesive surface with an interposition of a positioning contour.

21. The body structure according to claim 20, wherein said positioning contour is a positioning flank which is in positive contact with the respective said bead wall.

22. The body structure according to claim 13, wherein said spacer is formed of two-component injection molded plastics material and/or said battery top wall is screwed to said stiffening structure inside said battery at a screw position on said bead base of said stiffening bead.

23. The body structure according to claim 22, wherein a screw head of a screw is positioned at said screw position inside said stiffening bead.

24. The body structure according to claim 22, wherein said screw position and the adhesive connection of said spacer to said battery top wall are functionally and/or spatially separate from one another.

25. The body structure according to claim 10, wherein said spacer is formed of plastics material molded in a two-component injection molding process.

Description

[0016] In the figures:

[0017] FIG. 1 shows, in a perspective partial view, a body structure of a motor vehicle;

[0018] FIG. 2 shows, in a lateral sectional view, the assembled position of the traction battery in the body structure;

[0019] FIGS. 3 and 4 each show different views of spacers according to the invention.

[0020] In FIG. 1 there is shown a body structure of a two-track vehicle, which will be described hereinbelow inasmuch as it is required for the understanding of the invention. Accordingly, the body structure has two lateral sills 1 running in the vehicle longitudinal direction x, only one of which is shown in FIG. 1. The sill 1 extends in the vehicle longitudinal direction x between a front A-pillar 3 and a rear C-pillar 5 and delimits side door openings 7 at the bottom. A crash-sensitive traction battery 9 is installed in the vehicle floor of the body structure. The traction battery is positioned beneath a floor sheet-metal part 10 and extends in the vehicle transverse direction y between the two sills 1. In the vehicle longitudinal direction x, the traction battery 9 extends between a front cross-member and a rear cross-member, which are not shown in the figures.

[0021] As is apparent from FIG. 1, the traction battery 9, when viewed in the vehicle vertical direction z, is positioned at approximately the same height as the sills 1. In FIG. 2, the traction battery 9 has a battery housing 13, namely with a housing side wall 16, a top wall 15 and a bottom wall 17. The housing side wall 16 is configured with a laterally protruding housing flange 19, which engages beneath the sill 1 and is in a screw connection 21 therewith. Inside the traction battery 9 there are positioned battery cells 23 and a stiffening structure inside the battery, which has inter alia a battery cross-member 25 shown in FIG. 2 which extends in the vehicle transverse direction y between the two housing side walls 16. In FIG. 2, only half the body structure up to the vehicle mid-plane E is shown. The other half which is not shown is approximately the mirror image thereof. In the event of a side crash, the impact forces are transmitted from the sill 1 that faces the crash in a transverse load path, which includes the battery cross-member 25, in the direction towards the sill 1 that is remote from the crash.

[0022] In an assembly operation, the traction battery 9 is first inserted in an assembly direction from beneath the vehicle into an installation space 12 which is defined by the two front and rear body cross-members and the lateral sills 1 and the floor sheet-metal part 10. The housing flange 19 of the traction battery 9 is then screwed to the front and rear body cross-members and to the sills 1, namely with the formation of a free installation gap 27 between the battery top wall 15 and the floor sheet-metal part 10.

[0023] As is apparent from FIG. 3, a number of stiffening beads 31 can be formed in the battery top wall 15, only one of which is shown in FIG. 3 or 4. The stiffening bead 31 has a bead base 35 which is set back by a bead height from a top wall base portion 33 towards the battery interior. The bead base 35 is in force-transmitting contact with the battery cross-member 25 at a screw position 37. As is further apparent from FIG. 3 or 4, the spacers 29 are supported directly in the stiffening bead 31 on the bead base 35 thereof. As a result—when the floor sheet-metal part 10 is loaded—a vertical load path from the floor sheet-metal part 10 via the spacer 29 and the battery top wall 15 into the stiffening structure inside the battery (that is to say the battery cross-member 25) is provided. The battery cross-member 25 is therefore included in a transverse load path (in the event of a side crash) and/or in a vertical load path, depending on the loading case.

[0024] The geometry of the spacer 29 will be described hereinbelow: Accordingly, the spacer 29 is formed in two parts from a buffer 39 and a base 41. The buffer 39 is produced from an elastically resilient plastics soft component, while the base 41 is formed of a plastics hard component which is a rigid component in comparison. An important aspect of the invention consists in that, in the installed position, the spacer 29 is supported between the floor sheet-metal part 10 and the battery top wall 15 with elastic deformation of the buffer 39. For this purpose, the overall height h (FIG. 4) of the spacer 39 in the undeformed production state is greater than the size of the installation gap 27, as is indicated in FIG. 4. In FIG. 4, the spacer 29—contrary to the actual installed position—is shown in the undeformed production state.

[0025] The spacer base 41 has on its bottom side a supporting contour of two supporting ribs 42 which are spaced apart from one another and are supported in loose contact on the bead base 35. Between the two supporting ribs 42 there is defined an open passage 44, which will be described hereinbelow.

[0026] As is further apparent from FIG. 3, the base supporting contour (supporting ribs 42) merges in the vehicle longitudinal direction x (that is to say transversely to the bead longitudinal direction) on both sides, to the front and to the rear, with the interposition of a positioning flank 47, into a front base adhesive surface 43 and a rear base adhesive surface 49, which are adhesively bonded to the planar top wall base portion 33 with the interposition of an adhesive layer 45. The adhesive connection is therefore outside the stiffening bead 31 and offset with respect to the supporting contour 42 by an amount of offset Δx (FIG. 4). The two positioning flanks 47 of the spacer base 41 are in positive, loose contact with the respective bead walls 51 of the stiffening bead 31, which merge at transition edges 53 into the planar top wall base portion 33.

[0027] The screw position 37, which is only adumbrated in FIGS. 2, 3 and 4, has a fastening screw, not shown, the screw head 57 (FIG. 2 or 3) of which is positioned, in a manner that is advantageous in terms of installation space, inside the stiffening bead 31. The stiffening bead 31 extends in the vehicle transverse direction y as far as the lateral edge of the battery cover wall 15 that is outside the vehicle, and is open to outside the vehicle in the vehicle transverse direction y. In this manner, water or dirt which collects in the stiffening bead 31 in driving operation can be discharged to outside the vehicle in the vehicle transverse direction y in a discharge direction A (FIG. 3), namely through the open passage 44 of the spacer 29.

LIST OF REFERENCE NUMERALS

[0028] 1 sill [0029] 3 A-pillar [0030] 5 C-pillar [0031] 7 side door openings [0032] 9 traction battery [0033] 10 floor sheet-metal part [0034] 11 battery housing [0035] 12 installation space [0036] 13 housing side wall [0037] 15 battery top wall [0038] 16 housing side wall [0039] 17 battery bottom wall [0040] 19 housing flange [0041] 21 screw connection [0042] 23 battery cells [0043] 25 battery cross-member [0044] 27 installation gap [0045] 29 spacer [0046] 31 stiffening bead [0047] 33 top wall base portion [0048] 35 bead base [0049] 37 screw position [0050] 39 buffer [0051] 41 base [0052] 42 supporting ribs [0053] 43 front adhesive surface [0054] 44 passage [0055] 45 adhesive layer [0056] 47 positioning flanks [0057] 49 rear adhesive surface [0058] 51 bead side wall [0059] 53 transition edge [0060] 55 fastening screw [0061] 57 screw head [0062] Δx amount of offset [0063] A discharge direction [0064] E vehicle median longitudinal plane [0065] h overall height of the spacer 29