Floor structure for the body of a motor vehicle

Abstract

The invention relates to a floor structure for the body of an electrically drivable motor vehicle, having a vehicle floor (3) which is joined together from a plurality of lightweight plates (13). In order to provide a floor structure to which a battery housing (39) of an energy store of an electric drive of the motor vehicle is particularly advantageously secured, a plurality of holding elements (46) are provided on the upper face (45) of the battery housing (39), the holding elements being connected to the vehicle floor via connecting means (49) and each of the lightweight plates (13) of the vehicle floor (3) having respective receiving depressions (50) within which the respective corresponding holding elements (46) of the battery housing (39) are at least partly received.

Description

[0001] Floor structure of a motor vehicle body

[0002] The invention relates to a floor structure of a motor vehicle body according to the preamble of claim 1. Furthermore, the invention relates to a method for producing such a floor structure according to the preamble of claim 9.

[0003] Such a floor structure is already known, for example, from DE 199 17 177 B4 and comprises a vehicle floor which is composed of one or more lightweight panels.

[0004] The object of the present invention is to provide a floor structure and a method by which a battery housing of an energy storage device of an electric drive of the motor vehicle is attached to the floor structure in a particularly advantageous manner.

[0005] This problem is solved according to the invention by a soil structure and a method with the features of claims 1 and 9, respectively. Advantageous embodiments with favorable further developments of the invention are the subject of the dependent claims.

[0006] The floor structure according to the invention for the body of an electrically powered motor vehicle comprises a vehicle floor made up of a plurality of lightweight panels. The lightweight panels are arranged one behind the other in the longitudinal direction of the vehicle, with their longitudinal extension running, in particular, in the transverse direction. This results in particularly favorable scalability of the vehicle floor. Furthermore, corresponding openings can be easily created by omitting sections of the lightweight panels along their length. Due to this orientation of the lightweight panels in the transverse direction and their arrangement one behind the other in the longitudinal direction, it is possible, for example, to create corresponding derivatives or variants within a vehicle series in a simple yet rigid and stable manner, whose vehicle floors have different lengths relative to the vehicle's longitudinal direction.In particular, the potential use of different lightweight panels, which may vary in height relative to the vehicle's height and / or width relative to its length, or in their shape, material, or thickness, allows for easy scalability of the floor structure or vehicle floor. Each lightweight panel has a top wall with hollow chambers between it. These top walls are spaced apart, ensuring an extremely rigid design for each panel and the vehicle floor as a whole.Furthermore, the hollow chambers can be used for a wide variety of functions, such as routing cables, conveying media, filling with insulating material and / or energy-absorbing material, or similar applications. The respective lightweight panels are formed primarily by extruded profiles with hollow chambers running transversely to the vehicle. Such extruded profiles are particularly easy and cost-effective to manufacture. The longitudinal extent of the respective lightweight panel refers specifically to the fact that, for example, hollow chambers within the lightweight panels run transversely to the vehicle, or that the corresponding lightweight panels are dimensioned so that their longitudinal extent runs transversely to the vehicle.

[0007] To create a floor structure to which a battery housing of an electric vehicle's energy storage system can be attached in a particularly advantageous manner, a number of retaining elements are arranged on the top of the battery housing and connected to the vehicle floor via fasteners. This achieves a particularly stable, space-saving, and rigid connection of the battery housing to the vehicle floor, as the lightweight floor panels have corresponding recesses within which the respective retaining elements of the battery housing are at least partially accommodated.Since the retaining elements of the battery housing protrude into the recesses of the vehicle floor, not only is a particularly close, possibly even flush, arrangement of the battery housing on the vehicle floor possible, but also a particularly stiff and stable connection, so that vibrations can be avoided in a particularly favorable way.

[0008] In a further embodiment of the invention, the receiving recesses in the lightweight panels are designed as easily manufactured grooves. These grooves can be produced particularly easily by designing the lightweight panels as extruded profiles whose receiving recesses are formed as chambers created during extrusion, wherein the top wall of the lightweight panel is removed in the area of ​​the chamber to form the groove.

[0009] In a further embodiment of the invention, the retaining elements are designed as strips arranged on the upper side of the battery housing, which preferably terminate at a lateral distance from the respective connections of the battery housing to the side sills. This results in a particularly stable fastening of the battery housing to the vehicle floor, whereby, by appropriately selecting the distance between the strips and the connections of the battery housing to the side sills, shear forces acting on the connecting elements in the event of a side impact can be reduced.

[0010] In a further embodiment of the invention, recesses are formed in the lightweight panels from a top side, in which the connecting elements for securing the battery housing are recessed. This results in a simple, recessed arrangement of the connecting elements. The recesses can be created particularly easily by forming them as chambers created during the extrusion of the lightweight panels.

[0011] The advantages described above in connection with soil structure also apply to the method according to the invention.

[0012] Further features of the invention will become apparent from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown in the figures alone, are not only usable in the combinations specified, but also in other combinations or on their own.

[0013] The invention will now be explained in more detail with reference to a preferred embodiment and the drawings. The drawings show:

[0014] Fig. 1a, b, c, d shows a perspective top view and bottom view of a floor structure of a motor vehicle body with a vehicle floor made of a plurality of lightweight panels, in which the lightweight panels are oriented with their longitudinal extent in the transverse direction of the vehicle and are arranged one behind the other in the longitudinal direction of the vehicle, as well as respective partial perspective views in the area of ​​the front and rear ends of the vehicle floor.

[0015] Figs. 2a, 2b are respective sectional views, namely the soil structure along a

[0016] longitudinal direction of the vehicle or section plane running in the vertical direction of the vehicle,

[0017] Fig. 3 shows further partial sectional views of the vehicle floor along a cutting plane running in the longitudinal direction of the vehicle and in the vertical direction of the vehicle, respectively.

[0018] Fig. 4 shows three schematic and perspective sectional views through a plurality of lightweight panels, by means of which a length scaling of the vehicle floor can be implemented.

[0019] Fig. 5 shows respective sectional views through the floor structure along corresponding cutting planes running in the longitudinal direction of the vehicle or in the vertical direction of the vehicle, in which respective vehicle floors scaled in length according to Fig. 4 are used.

[0020] Fig. 6 shows a partial top view of a vehicle floor formed from a plurality of lightweight panels, within which respective openings are recessed.

[0021] Figs. 7a, 7b respective cross-sectional views along a cutting plane extending in the vehicle's vertical direction or in the vehicle's transverse direction through the floor structure according to the invention,

[0022] Figs. 8a, 8b show partial sectional views along corresponding cutting planes running in the longitudinal direction of the vehicle or in the vertical direction of the vehicle in the area of ​​a respective cross member at the front or rear end of the vehicle floor, respectively.

[0023] Fig. 9 shows an underside view of the floor structure with the vehicle floor, on which a circumferential seal for a battery housing is arranged on the underside, as well as a partial sectional view along a section running in the longitudinal and vertical directions of the vehicle through the floor assembly in the area of ​​the seal,

[0024] Fig. 10 shows a partial sectional view through the floor assembly and the battery housing located below the vehicle floor along a section running in the transverse and vertical directions of the vehicle, showing the seal between the vehicle floor and the battery housing.

[0025] Fig. 11 shows a perspective sectional view along a section plane running in the longitudinal and vertical directions of the vehicle through the floor structure, showing the battery housing of the energy storage system for an electric drive of the motor vehicle, which is attached to the underside of the vehicle floor.

[0026] Fig. 12 shows a perspective view of the battery housing of the energy storage system for the electric drive of the motor vehicle, and

[0027] Fig. 13 shows a sectional view along a cutting plane extending in the longitudinal direction and vertical direction of the vehicle through the floor structure with the battery housing attached to the underside of the vehicle floor.

[0028] Figures 1a and 1b show, in perspective top and bottom views respectively, a floor structure and chassis of a motor vehicle body, comprising a front structure 1 and a rear structure 2, between which a vehicle floor 3 extends. The front structure 1 extends longitudinally to the rear of the vehicle up to a front bulkhead 4, which divides the front structure 1 from a passenger compartment 5. Within the area of ​​the front structure 1, longitudinal members / engine mounts 6 and upper longitudinal members 7 at the level of each fender bank are visible, extending rearward to the respective front door pillars 8, which laterally frame the front bulkhead 4.

[0029] The rear body structure 2 essentially comprises rear longitudinal members 9, which extend inside the respective wheel arches 10 over the rear wheels and connect at their front ends to the rear ends of the respective side sills 11, which extend over the entire length of the vehicle floor 3 between the front and rear wheel arches 10. Between the rear longitudinal members 9 are also respective body-in-white structural components, such as cross members of a rear floor structure 12.

[0030] Figures 1c and 1c show partial perspective views of the front and rear ends of the vehicle floor 3. Longitudinal structures 31, which are designed like a central tunnel or exhibit a similar stiffening behavior, are further explained in connection with Figures 6, 7a, and 7b.

[0031] Figures 2a and 2b each show a sectional view along a section plane extending in the longitudinal direction and vertical direction of the vehicle, respectively, of the floor structure according to Figures 1a and 1b. Furthermore, Figure 3 shows partial sectional views of the vehicle floor 3, also along a section plane extending in the longitudinal direction and vertical direction of the vehicle. Figure 4 additionally illustrates the scaling possibilities of the vehicle floor 3 using three schematic sectional views, which will be explained in more detail below.

[0032] In summary, Figures 1a to 4 show that the vehicle floor 3 is formed from a plurality of lightweight panels 13, which are oriented in their longitudinal extent in the transverse direction of the vehicle and are arranged one behind the other in the longitudinal direction of the vehicle.

[0033] As can be seen particularly from Figures 2a to 4, in the present embodiment the respective lightweight panels 13 are designed as extruded profiles, for example aluminum extruded profiles, with respective cover walls 14, 15, between which respective hollow chambers subdivided by webs 16 are formed. The extruded profiles or hollow chambers 17 of the lightweight panels 13 therefore also extend in their longitudinal direction transverse to the vehicle.

[0034] In particular, Fig. 4 shows that a plurality of lightweight panels 13, extending transversely and approximately horizontally, are arranged one behind the other to form the vehicle floor 3 of a corresponding length, depending on the derivative or construction variant of the respective vehicle series being created. Experience has shown that the vehicle floor 3, which is also referred to as the main floor or floor center, is longer in a 4- or 5-door sedan than, for example, in a three-door coupe or convertible.

[0035] As can be seen particularly in Fig. 4, the vehicle floor 3 is therefore scalable in length with respect to the longitudinal direction of the vehicle by arranging a different number of lightweight panels 3 one behind the other in the longitudinal direction of the vehicle. While, for example, six lightweight panels 13 are used in the lower embodiment according to Fig. 4, nine lightweight panels 13 are used in the middle embodiment and seven lightweight panels 13 in the uppermost embodiment.

[0036] Figure 4 also shows that the respective lightweight panels 13 can assume different shapes or forms in cross-section. While some lightweight panels 13 have a uniform thickness with, for example, only one row of hollow chambers 17, there are also lightweight panels 13h which, for example, have a larger cross-section with two rows of hollow chambers 17 arranged one above the other. These lightweight panels 13h serve, for example, as crossbeams or seat crossbeams.

[0037] Furthermore, Fig. 4 shows individual lightweight panels 13ü, each with openings 18 in one of the cover walls 14. These openings 18 can serve various purposes, for example, for fastening corresponding components or parts, or for routing components, lines, cables, or the like within the hollow chambers 17, or for at least partially housing components within the respective lightweight panel 13ü.

[0038] By using both uniform lightweight panels 13, which are intended for multiple derivatives or variants of a vehicle series and variant-specific lightweight panels 13, which are intended for only one or more derivatives or variants of a vehicle series, it is thus possible, as shown in Fig. 4, to easily assemble a desired vehicle floor 3 of the corresponding length, for example, to obtain a vehicle floor 3 for a longer vehicle, such as a sedan, or for a shorter vehicle, such as a coupe or a convertible. The respective lightweight panels 13 can be connected to one another, for example, by appropriate joining connections, by mechanical fasteners, or by means of other components, such as support components like the side sills 11.

[0039] The connection option can be seen in conjunction with Figs. 3 and 4 with Figs. 8a and 8b, in which respective sectional views of the front and rear ends of the vehicle floor 3 are shown along a respective cutting plane running in the longitudinal direction of the vehicle or in the vertical direction of the vehicle.

[0040] For example, it can be seen from Fig. 8b that the lightweight panel 13 is combined with the lightweight panel or lightweight support 13h, which in this case is designed as a cross member or heel element 32, on which the vehicle floor 3 transitions at its rear end into a rear floor, in what way the two lightweight panels or supports 13, 13h are combined.

[0041] It can thus be seen that the two lightweight panels 13 and 13h, respectively, have a projecting flange 21 and 22 on their respective end faces 19 and 20, in the area of ​​their opposite broad sides or cover walls 14 and 15, which run parallel to each other on both sides. These flanges are connected to the corresponding cover wall 14 and 15 of the adjacent lightweight panel 13 and 13h, forming a flange connection 23 and 24. The respective flange 21 and 22 can, as is the case with flange 21 and the associated cover wall 14, lie at least substantially in one plane.

[0042] Between the respective flanges 21, 22 and their corresponding cover walls 14, 15, an adhesive bond or adhesive connection can be provided, for example. Likewise, a corresponding adhesive bed can be present between the respective end faces 19, 20 of the two lightweight panels 13, 13h. Furthermore, it can be seen that this type of double-shear connection with the two flange connections 23, 24 is suitable for compensating for tolerances in the longitudinal direction of the vehicle, depending on how the two end faces 19, 20 are spaced relative to each other. The flanges 21, 22 are thus adjustable relative to the corresponding cover walls 14, 15, whereby the distance between the facing end faces 19, 20 varies.

[0043] Furthermore, it can be seen that the two flange connections 23, 24, spaced apart at the level of the respective cover wall 14, 15, create a connection between the two lightweight panels 13, 13h, allowing the entire vehicle floor to be subjected to tensile or compressive loads, for example, in the plane of the respective cover wall 14, 15. The sandwich-like, double-walled design of the respective lightweight panel 13, 13h in the joining area thus provides a particularly rigid and stable connection between the panels. The double-shear connection of the respective lightweight panels 13, 13h shown here is, of course, applicable to all lightweight panels, such as those shown in connection with Fig. 4.

[0044] Alternatively, the two lightweight panels 13, 13h can also be joined together by gas metal arc welding in the area of ​​the flange connections 23, 24. Furthermore, it is conceivable to use flow-drill screws or semi-tubular rivets in addition to the adhesive bond.

[0045] From Figs. 2a to 3 it can also be seen that the present sandwich floor or vehicle floor 3 is scalable both via the height of the respective lightweight panels 13, their profile design or division of the hollow chambers 17 as well as via the wall thickness of the respective cover walls 14, 15 or webs 16.

[0046] Thus, as can be seen, for example, in Fig. 3, individual lightweight panels 13h with a different height profile can be exchanged according to arrow 25, for example depending on the vehicle weight or other conditions. Likewise, individual lightweight panels 13h can be exchanged depending on the corresponding seat connection or other conditions according to arrow 26.

[0047] Figure 5, which shows the floor structure in three sectional views along a respective section plane running in the longitudinal direction of the vehicle or in the vertical direction of the vehicle, illustrates the different lengths of the vehicle floors as shown in Figure 4. It is also particularly evident that a cross member element 27, 28 in the form of a corresponding lightweight profile or a lightweight panel / extruded profile is arranged at the front and rear ends of the vehicle floor 3.

[0048] This respective crossbeam element 27, 28 is connected to the respective lightweight panels 13 of the vehicle floor 3 in the manner described in connection with Figures 8a and 8b. The front crossbeam element 27 creates, in particular, a transition from the vehicle floor 3 to the front wall 4, which can be formed, for example, as a sheet metal forming part, a cast component, or also from lightweight panels. The connection of the corresponding crossbeam element 27 to the front wall 4 can be effected, for example, by a joining connection or by mechanical fasteners. The respective front longitudinal beams / engine mounts 6 are also supported and fastened to the front crossbeam element 27.

[0049] The rear crossmember element 28, at which the vehicle floor 3 transitions into a rear floor 29, is also designed as an extruded profile or multi-chamber profile or lightweight panel. The height of this crossmember element 28 can be variable. The crossmember element 28 is connected to the rear floor 29, which can be formed, for example, from a sheet metal forming part, a metal casting component, or several lightweight panels, via joining connections and / or mechanical fasteners.

[0050] Figure 6, which shows a partial top view of the vehicle floor 3, illustrates that three openings 30 can be provided within the vehicle floor. These openings 30 are formed by maintaining a corresponding gap between two lightweight panels 13 that overlap each other in the transverse direction of the vehicle. In other words, in the area of ​​each opening 30, two lightweight panel sections 13t are provided by means of a continuous lightweight panel 13, which have the same width in the longitudinal direction of the vehicle. This provides a simple way to create a corresponding opening 30, for example, in areas that are subject to little stress or that are necessary to access a corresponding area below the vehicle floor, for example, to provide access to a battery housing for an electric drive system.In combination with Figs. 1a and 1b, Fig. 6 and Figs. 7a and 7b, which show respective cross-sectional views along a cutting plane running in the vehicle's vertical direction or in the vehicle's transverse direction through the floor structure according to the invention, it becomes particularly clear how the front and rear longitudinal structure 31 are designed.

[0051] The front longitudinal structure 31, which, according to Fig. 1a, connects to a pedal base 37 of the front bulkhead 4, comprises two profile elements 33 extending towards each other in the longitudinal direction of the vehicle. These profile elements are designed as extruded profiles extending in the longitudinal direction of the vehicle. In the connection area to the pedal base 37, additional, essentially triangular profile elements 34 are attached to the upper side of the respective profile elements 33, providing additional stiffening. The two profile elements 34 are also connected to each other via at least one transverse element 35.

[0052] The longitudinal structure 31, or the respective profile elements 33, which span the openings 18 in a bridge-like manner, also connect the corresponding lightweight panels 13 on their upper sides. The longitudinal structures 31 serve, in particular in the longitudinal direction of the vehicle, to stiffen the vehicle floor 3.

[0053] In the longitudinal structure 31 shown in Fig. 1d, respective profile elements 36 are provided, which in particular serve as corner stiffeners between the lightweight panels 13 of the vehicle floor 3 and the extruded profile 13 designed as a heel element 32. The profile elements 36 are also designed as extruded profiles.

[0054] Figures 7a and 7b show, in particular, the respective side sills and their connection to the vehicle floor 3. Figure 7a shows a cross-section through the floor structure in the area of ​​the longitudinal structure 31. Figure 7b shows a cross-section through the floor structure in the area of ​​a raised lightweight panel 13h, which in this case is designed as a seat cross member.

[0055] Furthermore, it becomes clear that the vehicle floor 3, or rather its lightweight panels 13, butt-join the respective side sills 11 and are connected to the corresponding side sill 11, for example, via a weld seam in both the area of ​​the upper cover wall 14 and the lower cover wall 15. The side sills 11 are, for example, composed of profile elements, which are designed as extruded profiles running horizontally in the longitudinal direction of the vehicle.

[0056] Fig. 9 shows a bottom view of the floor structure with the vehicle floor 3, on the underside of which a circumferential seal 38 is arranged for a battery housing 39. It is particularly evident that the seal 38 is located on the inside of the side sills 11 and on the inside (behind and in front of) the respective front and rear crossmembers 13h. Thus, the seal 38 runs along the underside of the vehicle floor 3, which is predominantly flat and has a smooth surface.

[0057] A partial sectional view shown in Fig. 9, along a section running longitudinally and vertically through the floor assembly in the area of ​​the seal 38, reveals that, for the production of the lower flange connection 24, a joining area 40 of the respective cover wall 14 and the corresponding flange 22 of the cover wall 15 are formed in the area of ​​the flange connection 24, recessed relative to the cover walls 14, 15, thus creating a gap 41 between the adjacent cover walls 15 of the lightweight panels 13, 13h. This gap 41 is filled with a filler material 42, for example, a PVC-based material, resulting in a flat surface 43 with the cover walls 15. The seal 33 can then run over this flat surface 43, thereby avoiding changes in height that could cause leaks.

[0058] The planar course of the seal 38 is illustrated in Fig. 10 in a partial sectional view through the floor assembly and the battery housing 39 arranged below the vehicle floor 3 along a section running in the transverse and vertical direction of the vehicle, whereby the seal 38 between the vehicle floor 3 and the battery housing 39 is visible.

[0059] Furthermore, Fig. 10 clearly shows that the battery housing 39 is connected to the side sills 11 via respective connections 44 in the form of screw connections. At the front and rear, the battery housing 11 is connected to the corresponding cross members 27, 28 analogously to the side sills 11, so that, as shown in Fig. 9, the battery housing 39 is connected around its entire circumference to the side sills 11 and cross members 27, 28 of the floor structure via respective connections 44. A plurality of retaining elements in the form of strips 46 are arranged on an upper surface 45 of the battery housing 39, which, for example – as can be seen in Fig. 13 – are designed as deep-drawn sheet metal parts and are connected to the upper part of the battery housing by spot welding or another joining connection.

[0060] In the present case, two strips 46 are arranged in a linear overlap in the transverse direction of the vehicle, with a central area free and the strips 46 spaced apart on their outer sides from an outer surface of the battery housing 39. Nuts 47 are integrally formed on each of the strips 46, which, together with the screws 48 shown in Fig. 13, form respective connecting elements 49 by means of which the battery housing 39 is fastened to the vehicle floor 3 in the central area.

[0061] Fig. 11 shows a perspective sectional view along a section plane extending longitudinally and vertically through the floor structure, showing the battery housing 39 of the energy storage system for the electric drive of the vehicle, which is attached to the underside of the vehicle floor 3. Similarly, Fig. 13 shows a sectional view along a section plane extending longitudinally and vertically through the vehicle, revealing the arrangement of the battery housing 39 on the underside of the vehicle floor.

[0062] As can be seen in Fig. 13, the lightweight panels 13 of the vehicle floor 3 each have receiving recesses 50 within which the corresponding retaining elements / strips 46 of the battery housing 39 are at least partially, and in this case essentially completely, received. Since the retaining elements 46 are designed as strips 46 in this case, the receiving recesses 50 are designed as grooves extending over the entire length of the lightweight panels 13 or over the entire width of the vehicle floor 3 in the transverse direction of the vehicle, as can be seen, for example, in conjunction with Fig. 3 in Fig. 13.

[0063] In the present case, where the lightweight panels 13 are designed as extruded profiles, the receiving recesses / grooves 50 are designed as chambers introduced during the extrusion of the lightweight panels 13, wherein, following extrusion, the top wall 15 of the lightweight panel 13 is removed to form the groove 50 in the area of ​​the chamber.

[0064] Similarly, from a top side 51, 13 respective lightweight panels are inserted.

[0065] Recesses 52 were formed in which the heads of the screws 48 of the

[0066] The connecting means 49 for securing the battery housing 39 are recessed. These respective recesses 52 are formed by chambers introduced during the extrusion of the lightweight panels 13, which are subsequently made accessible from the outside or from above by means of through holes 53 in the cover wall 14.

[0067] Furthermore, it can be seen particularly from Fig. 13 that the battery housing 39, in its assembled state, is positioned with its upper surface 45 at least close to the underside of the vehicle floor 3 or even touches it. This results in the desired, particularly stable and compact attachment of the battery housing 39 in the central area of ​​the floor structure to the vehicle floor 3.

[0068] The strips 46 end at a lateral distance to the respective connections 44 of the battery housing 39 with the side sills 11 in order to minimize shear forces of the screw connection, which can occur, for example, in the event of a side impact on the side sills 11.

[0069] Reference symbol list

[0070] Front structure Rear structure Vehicle floor Bulkhead Passenger compartment Longitudinal members / engine mounts Longitudinal members Door pillars Longitudinal members Wheel arches Side sills Floor structure Lightweight panels Cover wall Cover wall Web Hollow chamber Opening Front face Front face Flange Flange Joint connection Joint connection Arrow Arrow Cross member element Cross member element Rear floor Opening Longitudinal structure Heel element Profile elements Profile elements Cross element Profile elements Pedal floor Seal Battery housing Joint area Gap Filling material Surface Connections Top side Retaining elements / strips Nuts Screws

[0071] Fasteners, receiving recesses, top side, recesses, through holes

Claims

Patent claims 1. Floor structure of a body of an electrically powered motor vehicle, comprising a vehicle floor (3) which is composed of a plurality of lightweight panels (13), characterized in that a battery housing (39) of an energy storage device of an electric drive of the motor vehicle is arranged below the vehicle floor (3), on the upper side (45) of which a plurality of retaining elements (46) are arranged, which are connected to the vehicle floor (3) via connecting means (49), wherein the lightweight panels (13) of the vehicle floor (3) have respective receiving recesses (50) within which the respective corresponding retaining elements (46) of the battery housing (39) are at least partially received.

2. Floor structure according to claim 1, characterized in that the receiving recesses (50) in the lightweight panels (13) are designed as grooves.

3. Floor structure according to claim 2, characterized in that the lightweight panels (13) are designed as extruded profiles, the receiving recesses (50) of which are formed during extrusion.

4. Floor structure according to claim 3, characterized in that the receiving recesses (50) are formed as chambers introduced during the extrusion of the lightweight panels (13), wherein the top wall (15) of the lightweight panel (13) is removed to form the groove in the area of ​​the chamber.

5. Soil structure according to one of the preceding claims, characterized in that the retaining elements (46) are designed as strips arranged on the top of the battery housing (39).

6. Floor structure according to claim 5, characterized in that the strips (46) end at a lateral distance to the respective connections (44) of the battery housing (39) with the side sills (11).

7. Floor structure according to one of the preceding claims, characterized in that respective recesses (52) are formed in the lightweight panels (13) from a top side (51), in which the connecting means (49) for fixing the battery housing (39) are recessed.

8. Floor structure according to claim 7, characterized in that the respective depressions (52) are designed as chambers introduced during the extrusion of the lightweight panels (13).

9. Method for manufacturing a floor structure of a body of an electrically powered motor vehicle, comprising a vehicle floor (3) which is assembled from a plurality of lightweight panels (13), characterized in that a battery housing (39) of an energy storage device of an electric drive of the motor vehicle is arranged below the vehicle floor (3), on the upper side (45) of which a plurality of retaining elements (46) are arranged, which are connected to the vehicle floor (3) via connecting means (49), wherein the lightweight panels (13) of the vehicle floor (3) have respective receiving recesses (50) within which the respective corresponding retaining elements (46) of the battery housing (39) are at least partially received.

10. Method according to claim 9, characterized in that the receiving recesses (50) formed as grooves are created by removing the top wall (15) of the lightweight panel (13) and in the area of ​​the respective chambers introduced during the extrusion of the lightweight panels (13).

11. Method according to claim 9 or 10, characterized in that respective recesses (52) are formed in the lightweight panels (13) from a top side (51), in which the connecting means (49) for fixing the battery housing (39) are recessed, wherein the respective recesses (52) are formed as chambers introduced during the extrusion of the lightweight panels (13), which are formed by removing the top wall (15) of the lightweight panel (13) and in the area of ​​respective chambers introduced during the extrusion of the lightweight panels (13).

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