Underbody Arrangement

Abstract

An underbody arrangement of a high-voltage storage device, which is overlapping with a floor panel of an electrically operable motor vehicle, in which the floor panel having at least one opening is arranged at least in some regions in the direction of the vehicle height so as to overlap with the high-voltage storage device, which includes a plurality of battery cells arranged on a base element. The at least one opening is arranged in the direction of the vehicle height so as to overlap with the base element of the high-voltage storage device and without overlap with the battery cells of the high-voltage storage device.

Claims

1.-4. (canceled)

5. An underbody arrangement of an electrically operable motor vehicle having a high-voltage storage device with a plurality of storage cells, comprising: a floor panel of the electrically operable motor vehicle that is configured for an overlapping arrangement, at least in some regions, with the high-voltage storage device, upwardly in a direction of a vehicle height, wherein the floor panel has at least one opening, which opening is provided for drainage of a medium and is arranged in the direction of the vehicle height so as to overlap the high-voltage storage device, but is arranged without overlap with the battery cells of the high-voltage storage device between a vehicle doorsill laterally adjacent to the floor panel and a battery cell nearest to the vehicle doorsill in a vehicle transverse direction, and the at least one opening is arranged at a lowest point of the floor panel in the direction of the vehicle height.

6. The underbody arrangement as claimed in claim 5, wherein the floor panel has a plurality of depressions, each of which comprises at least one associated opening.

7. The underbody arrangement as claimed in claim 5, wherein the at least one opening is closed with a plug element, and/or a motor vehicle component of the motor vehicle is received on the floor panel via the at least one opening.

8. The underbody arrangement as claimed in claim 1, further comprising: a wiring harness in overlapping arrangement with the at least one opening in the direction of the vehicle height.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a schematic plan view of an underbody arrangement with a plurality of floor panels which are in overlapping arrangement with a high-voltage storage device in the direction of the vehicle height, wherein the various floor panels have at least one opening which is in overlapping arrangement with the high-voltage storage device in the direction of the vehicle height, moreover without overlap with any battery cells of the high-voltage storage device.

[0024] FIG. 2 is a schematic sectional view of a detail of the underbody arrangement with the floor panel overlapping the high-voltage storage device in the direction of the vehicle height, the at least one opening of the floor panel being in overlapping arrangement with the high-voltage storage device in the direction of the vehicle height and without overlap with any of the battery cells of the high-voltage storage device, wherein the at least one opening in the floor panel is closed by a plug element.

DETAILED DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 shows a schematic plan view of an underbody arrangement 1 of an electrically operable motor vehicle in the direction of the vehicle height z from above. The underbody arrangement 1 comprises at least one, in the present case a plurality of, floor panels 2, each of which overlaps a high-voltage storage device 3 in the direction of the vehicle height z. Each of the floor panels 2 has at least one opening 4. The openings 4 in the floor panels 2 are arranged to overlap with the high-voltage storage device 3 in the direction of the vehicle height z. The first openings 5 are thus respective main receptacles for the motor vehicle component, which may be embossed upwards. The motor vehicle component may be, in particular, a body component. The first openings 5 can be at least conditionally suitable for paint drainage. In the present case, at least one second opening 6 is provided on at least one of the floor panels 2, and a medium applied to a particular floor panel 2 can drain away from the floor panel 2 via said at least one second opening. In particular, the various floor panels 2 are shaped in such a way that the second openings 6 are arranged at lowest points and thus in depressions, which are global and/or local minima of the floor panel 2 in question in the direction of the vehicle height z. A particular medium applied to the floor panel 2 can flow in the direction of the second opening 6 at least substantially without interference from beads of the corresponding floor panel 2 that are embossed upwardly in the direction of the vehicle height z. In particular, the various floor panels 2 are free of corresponding beads embossed upwards in the direction of the vehicle height z. In order to enable a corresponding, particularly advantageous drainage of the medium from a particular floor panel 2, it is provided that the particular floor panel 2 has the at least one second opening 6 both at its lowermost point and in respective optionally provided depressions at a corresponding lowermost point in the direction of the vehicle height z. As a medium, a paint of a cathodic dip painting process or a cleaning medium of a cleaning process of the particular floor panel 2 can flow through the respective second openings 6. In order to prevent liquid from flowing through the opening 4 in the floor panel 2 and/or to prevent soiling from passing through the opening 4 in the floor panel 2 to the high-voltage storage device 3, the at least one opening 4 in the floor panel 2 is closed by a plug element 9.

[0026] The underbody arrangement 1 is shown in FIG. 2 in a schematic sectional view, in which it can be seen that the at least one opening 4 in the floor panel 2 is in overlapping arrangement with the high-voltage storage device 3, in particular a base element 7 of the high-voltage storage device 3, in the direction of the vehicle height z and is arranged without overlap with various battery cells 8 of the high-voltage storage device 3. The battery cells 8 can be held on the base element 7. In the present case, the base element 7 is a storage cover of the high-voltage storage device 3, by means of which the battery cells 8 are overlapped upwards in the direction of the vehicle height z. In a first region intersecting a particular battery cell 8 in the direction of the vehicle height z, the high-voltage storage device 3 has a greater height in the direction of the vehicle height z than in a second region which does not overlap with the battery cells 8 of the high-voltage storage device 3 in the direction of the vehicle height z, in the present case an edge region of the high-voltage storage device 3. In this second region, the high-voltage storage device 3 is thus flattened in terms of its height in the direction of the vehicle height z. In this flattened region of the high-voltage storage device 3, the opening 4 in the floor panel 2 is in overlapping arrangement in the direction of the vehicle height z. Thus, the local or global minimum of the floor panel 2 in which the opening 4 is arranged is in overlapping arrangement with the flattened edge region and thus with the second region of the high-voltage storage device 3 in the direction of the vehicle height z, as a result of which the underbody arrangement 1 is designed to be particularly compact in terms of installation space in the direction of the vehicle height z.

[0027] In order to provide a particularly compact design of a vehicle floor of the motor vehicle comprising the underbody arrangement 1, a wiring harness, in particular a main wiring harness, which extends along the vehicle longitudinal direction x, can be arranged to overlap with the at least one opening 4 in the direction of the vehicle height z. This means that the wiring harness overlaps the at least one opening 4 upwards in the direction of the vehicle height z. In particular, the wiring harness, in the direction of the vehicle height z, is arranged in overlapping arrangement with a side region of the floor panel 2 adjacent to a vehicle doorsill 10. At least two motor vehicle components can be electrically connected to one another via the wiring harness. The arrangement of the wiring harness in overlap with the at least one opening 4 in the floor panel 2 allows the vehicle floor of the motor vehicle to be provided with a particularly low height along the direction of the vehicle height z.

[0028] In a method for providing the underbody arrangement 1, the floor panel 2 is provided first. Within the scope of providing the floor panel 2, the floor panel 2 can be acted upon by the medium, which can at least partially flow away from the floor panel 2 via the at least one second opening 6. Subsequently, the at least one opening 4 in the floor panel 2 is closed with the plug element 9 and the floor panel 2 is in overlapping arrangement with the high-voltage storage device 3 in the direction of the vehicle height z, wherein the at least one opening 4 in the floor panel 2 is in overlapping arrangement with the base element 7 in the direction of the vehicle height z and is without overlap with the battery cells 8 of the high-voltage storage device 3. In the present case, the at least one opening 4 in the floor panel 2 is in overlapping arrangement with the edge region of the high-voltage storage device 3 in the direction of the vehicle height z, as a result of which the at least one opening 4 is arranged in the vehicle transverse direction y between the vehicle doorsill 10 arranged laterally next to the floor panel 2 in the vehicle transverse direction y and a battery cell 8 nearest to the vehicle doorsill 10 in the vehicle transverse direction y. The floor panel 2 can adjoin an end wall and/or a heel plate and/or the vehicle doorsill 10 outwardly in the vehicle longitudinal direction x and/or in the vehicle transverse direction y. The at least one opening 4 is thus arranged further outwardly in the vehicle transverse direction y than the particular battery cell 8 of the high-voltage storage device 3 that is nearest to the opening 4. As a result, the at least one opening 4 in the floor panel 2 is in overlapping arrangement with the flattened edge region of the high-voltage storage device 3 in the direction of the vehicle height z, as a result of which the underbody arrangement 1 is provided with a particularly small thickness in the direction of the vehicle height z.

[0029] The underbody arrangement 1 described is based on the knowledge that, for a painting process, due to a trough geometry of the at least one floor panel 2, the second openings 6 are to be provided for a media drain, in the present case in the context of a cathodic dip painting process or for liquids from cleaning baths of a cleaning process. The at least one second opening 6, which is provided for the discharge of media from the floor panel 2, should if possible be located at a point of the floor panel 2 which is lowest in the direction of the vehicle height z, so that the medium collects there for drainage. Furthermore, it is expedient to use the at least one opening 4 as a receiving hole for the motor vehicle component, which is why a grid-parallel arrangement of the openings 4 is advantageous. The openings 4 can be used as holes for adhesion of the cathodic dip coating for profiles of the motor vehicle lying in an underfloor area, wherein the adhesion is caused by an electric field applied as part of the cathodic dip coating process.

[0030] The second openings 6 are each to be closed with a plug element 9. This plug element 9 usually represents a lowest point in a dimensional chain constituted by “floor panel 2 to high-voltage storage cover”. Since it is often not possible to emboss the high-voltage storage cover locally downward, in particular due to a narrow point to the battery cells 8, wherein a trough geometry in the high-voltage storage cover means an accumulation of water and thus entails a risk of corrosion in the case of steel covers, the plug element 9 is often decisive for a dimensional chain in the direction of the vehicle height z. In the case of a particularly large dimensional chain of the underbody arrangement 1 in the direction of the vehicle height z, an interior of the motor vehicle is particularly small in height and/or the high-voltage storage device 3 is to be kept particularly small in height in the direction of the vehicle height z and/or the motor vehicle is to be raised and/or a ground clearance is to be lowered.

[0031] In the underbody arrangement 1 described in conjunction with the figures, there is an optimized arrangement of the openings 4 in the particular floor panel 2, which is a vehicle floor. In the present case, the openings 4 are provided in the side region of the floor panel 2 adjacent to the vehicle doorsill 10. In the edge region of the high-voltage storage device 3 in overlapping arrangement with the side region in the direction of the vehicle height z, a height of the high-voltage storage device 3 is lower than a maximum height of the high-voltage storage device 3 in the direction of the vehicle height z, since the edge region in the direction of the vehicle height z is formed free of battery cells 8.

[0032] A geometry of the floor panel 2, in particular an arrangement of beads as well as motor vehicle components welded to the floor panel 2, allow liquid to flow off undisturbed into the side region of the floor panel 2, which is lower than a central region and in which the liquid can drain off from the floor panel 2 via the at least one opening 4.

[0033] Overall, the invention shows how a floor structure for an electrically operable motor vehicle with a paint drain optimized in respect of installation space can be provided.

LIST OF REFERENCE SIGNS

[0034] 1 underbody arrangement [0035] 2 floor panel [0036] 3 high-voltage storage device [0037] 4 opening [0038] 5 first opening [0039] 6 second opening [0040] 7 base element [0041] 8 battery cell [0042] 9 plug element [0043] 10 vehicle doorsill