Energy storage base plate assembly

Abstract

The invention relates to an energy storage floor assembly for an electrically driven vehicle, comprising an electrical energy storage device (14) which is accommodated in a multi-part storage housing (12) and arranged on the underside of a vehicle floor (6) of the energy storage floor assembly. In order to provide an energy storage floor assembly that can be constructed in a simpler and lighter manner, at least one longitudinal member (19) is arranged within the storage housing (12) of the energy storage device (14), which is connected at least indirectly at at least one end (20) to a support member (33) of the vehicle arranged in the region of the front end (3).

Description

Technical Field

[0001] The invention relates to an energy storage floor assembly for an electrically driven motor vehicle. Background Art

[0002] EP 2 468 609 A1 discloses an energy storage floor assembly in which a storage housing is provided on the underside of the vehicle floor, which houses an electrical energy storage device. The storage housing itself is situated within a trough-shaped receptacle, which is delimited laterally by corresponding side sills and forward and rearward by corresponding transverse beams. To achieve sufficient vehicle body structural rigidity in the area of ​​the safety compartment, the side sills and / or corresponding longitudinal beams (which must extend above the vehicle floor and therefore within the safety compartment) must have a correspondingly large cross-section. This not only results in considerable additional weight for the vehicle body but also limits the installation space within the safety compartment. This, in particular, compromises ergonomics within the safety compartment. Summary of the Invention

[0003] It is therefore an object of the present invention to provide an energy storage floor assembly of the type mentioned at the outset which can be constructed in a simpler and lighter manner.

[0004] To this end, the present invention proposes an energy storage floor assembly for an electrically driven vehicle, comprising an electrical energy storage device, which is accommodated in a storage housing and is arranged on the underside of the vehicle floor of the energy storage floor assembly, wherein at least one longitudinal beam is arranged within the storage housing of the energy storage device, which longitudinal beam is indirectly connected at at least one end to a bracket member of the vehicle arranged in the front area, and a wall area of ​​the vehicle floor is arranged between the longitudinal beam and the bracket member.

[0005] The energy storage floor assembly according to the invention is characterized by a storage housing in which, on the one hand, corresponding battery modules and electrical components of the energy storage device are accommodated and which is arranged on the underside of the vehicle floor, and, on the other hand, according to the invention, the storage housing accommodates a longitudinal beam which extends within the storage housing and is connected at at least one end to a carrier component of the vehicle.

[0006] Therefore, according to the present invention, at least one longitudinal member extending within the storage housing is provided and is at least indirectly supported on a corresponding support member of the vehicle extending in the front structural area of ​​the vehicle, so that the corresponding forces can be transmitted via the longitudinal member in the area below the vehicle floor or the safety compartment. As a result, other longitudinal members, such as side sills and / or longitudinal members in the vehicle interior, can be designed smaller or omitted, thereby simplifying the design of the energy storage floor assembly or the entire vehicle body. Furthermore, by designing and / or omitting the corresponding longitudinal members in the area of ​​the safety compartment interior, a corresponding increase in installation space can be achieved, which improves the ergonomics of the vehicle interior. By integrating the at least one longitudinal member into the storage housing of the energy storage device below the vehicle floor, a force or load path is created that preferably extends at least substantially linearly and in one plane, thereby optimizing the force transmission.

[0007] In another embodiment of the invention, it has proven advantageous if the vehicle floor is designed as a housing part of the accumulator housing and is connected to at least one further housing part of the accumulator housing via at least one gas-tight connection. As a result, the longitudinal beam can be easily designed as a body-in-shell part of a floor assembly of a vehicle body, thereby enabling a particularly advantageous connection to other support components of the vehicle body or to other support components.

[0008] In this context, it has proven advantageous in another embodiment of the invention for the at least one longitudinal member to be fastened to the underside of the vehicle floor. This allows the longitudinal member to be used to optimally reinforce the vehicle floor and floor assembly and simultaneously to optimally form a force or load path beneath the safety passenger cell.

[0009] Another advantageous embodiment of the present invention provides that the at least one longitudinal beam is directly connected to the carrier member. Thus, for example, forces from the front end area of ​​the vehicle can be optimally supported and transmitted rearward in the longitudinal direction of the vehicle.

[0010] Another advantageous embodiment of the invention provides that the at least one longitudinal member is connected to a further longitudinal member arranged below it, which is connected to the lower housing part of the accumulator housing. Thus, a particularly advantageous connection of the lower housing part of the accumulator housing to the upper housing part of the accumulator housing, which is preferably the vehicle floor, is achieved via the two longitudinal members.

[0011] Another advantageous embodiment of the invention provides that the at least one longitudinal member extends over the entire height of the accumulator housing and is connected to the lower housing part of the accumulator housing. The longitudinal member is thus suitable for directly connecting the lower housing part of the accumulator housing to an upper housing part, which is preferably a vehicle floor.

[0012] Finally, it has been found to be advantageous if the vehicle floor and the at least one longitudinal member are formed as part of a painted vehicle body in white. This results in a particularly cost-effective floor assembly in which the at least one longitudinal member is optimally formed as part of the painted vehicle body.

[0013] Preferably, the vehicle floor is inseparably connected to the at least one longitudinal member. This connection can be achieved in a material-locking manner, for example, by a welded connection or an adhesive connection.

[0014] The vehicle floor and the longitudinal member may be connected to one another at a plurality of points along the length of the longitudinal member or may be connected to one another substantially over the entire length of the longitudinal member.

[0015] Advantageously, the at least one longitudinal member is at least indirectly connected to the vehicle's carrier component at its end face. Furthermore, the longitudinal member is connected to the vehicle's carrier component at least indirectly and without play. Furthermore, the connection can be inseparable, for example, materially bonded, such as by welding or adhesive bonding.

[0016] As a result, a direct force transmission without deformation paths is achieved between the carrier member and the side member.

[0017] According to a preferred embodiment, a wall region of the vehicle floor extends between the longitudinal beam and the console member, so that the wall region is sandwiched.

[0018] As a result, the reservoir housing can be designed to be airtight more easily.

[0019] Further features of the invention are apparent from the drawings and the description of the drawings. The features and feature combinations mentioned in the above description as well as the features and feature combinations mentioned in the following description of the drawings and / or shown only in the drawings can be used not only in the respectively indicated combination but also in other combinations or on their own. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will now be described in detail with reference to a preferred embodiment and with reference to the accompanying drawings.

[0021] Figure 1 is an exploded view of an energy storage floor assembly for a motor vehicle according to one embodiment, in which the vehicle floor of the motor vehicle body forms one housing part of the storage housing, to which a floor element as the other housing part can be joined as indicated by the arrow, thereby achieving a gas-tight storage housing for accommodating the energy storage device;

[0022] Figure 2 is based on Figure 1 A perspective bottom view of an energy storage base plate assembly with a storage housing according to an embodiment of the present invention;

[0023] Figure 3 is a perspective view of a floor element according to a first embodiment having a plurality of corresponding longitudinal beams, which are assembled with further longitudinal beams arranged below them and which are in turn connected to the floor element, the corresponding upper longitudinal beams being fastened to the underside of the vehicle floor in the assembled state;

[0024] Figure 4 is based on Figure 3 A partial and perspective sectional view of an energy storage floor assembly of the illustrated embodiment, in which the floor elements are arranged on the underside of the vehicle floor of a motor vehicle via corresponding longitudinal beams;

[0025] Figure 5 is a partial and perspective top view of a vehicle floor, with corresponding longitudinal beams fixed to the underside of the vehicle floor, which are directly connected via the vehicle floor to corresponding transverse beams arranged on the upper side of the vehicle floor;

[0026] Figure 6 is another partial perspective sectional view of an energy storage floor assembly according to another embodiment, in which corresponding longitudinal beams are provided, which extend over the entire height of the storage housing and connect the lower floor element to the vehicle floor; and

[0027] Figure 7 Show the basis Figure 6 The partial and perspective sectional view of the energy storage floor assembly of the illustrated embodiment shows in particular that the axle bracket or similar subframe-like bracket extending in the front structural area is supported directly on associated longitudinal beams extending within the storage housing. DETAILED DESCRIPTION

[0028] Identical or functionally identical elements are provided with the same reference symbols in the figures.

[0029] Figure 1 and 2 A vehicle body 1 for an electrically operated vehicle is shown in a perspective exploded view and a perspective bottom view. Such a vehicle may, for example, be a vehicle with a fully electric drive (BEV) or a hybrid vehicle (PHEV) that, in addition to the purely electric drive, also has an internal combustion engine. In the present case, the vehicle body 1 typically comprises a front end wall 2 of the passenger compartment, which adjoins a front end or front structure 3 at the front, which comprises, for example, corresponding longitudinal members / engine supports 4 in a central longitudinal plane. The front end wall 2 transitions rearwardly into a transition region 5, which comprises, for example, an obliquely extending step floor or the like, and from there into a vehicle floor 6, which serves as the main floor, delimiting the passenger compartment downward and extending to side sills 7 (extending horizontally on the outside in the longitudinal direction of the vehicle). The vehicle floor 6 extends rearwardly into a transition region 8, in which it merges into a rear vehicle structure 9.

[0030] from Figure 1 It can also be seen that a plurality of cross members 10 are arranged on the upper side of the vehicle floor 6 and are fixed, for example, by suitable joining connections, in particular by welding, which extend in the vehicle transverse direction and are connected to the corresponding side sills 7. In addition to the vehicle floor 6, the energy storage floor assembly also includes a further housing part in the form of a floor or floor element 11, in particular from Figures 1 to 3 It can be seen that the further housing part is integral and, in the embodiment shown here, is designed to be at least approximately flat, except for the edge region. The floor element 11 together with the vehicle floor 6 forms a corresponding housing part of a multi-part storage housing 12, which is designed to accommodate the storage housing. Figure 3 The electrical energy storage device 14, which can be seen in the perspective view of FIG, comprises a plurality of corresponding battery modules 13. These battery modules 13 are shown in FIG. Figure 3 ) are combined into respective battery packs 15 , wherein respective supporting elements in the form of pressure plates 16 are provided, which are connected to one another via respective clamping elements 17 and clamp the individual battery modules 13 to one another.

[0031] The vehicle floor 6 and the floor element 11 are based on Figure 1 1 and 12 are connected to each other as shown in FIG. 1 , and a gas-tight connection 18 is provided which runs around the outer circumference. This gas-tight connection 18 can be provided directly between the floor element 11 and the vehicle floor 6 or between the floor element 11 and other body-in-shell components of the vehicle body 1 to form a corresponding gas-tight receiving space for the storage housing 12.

[0032] Especially according to Figure 3 In the present case, a plurality of longitudinal beams 19 extend within the storage housing 12 and are connected at least at one end 20, in the present case at the front end 20, to a carrier component of the vehicle in a manner described in greater detail below. Figure 4 (This figure is similar to Figure 3 (See also the energy storage floor assembly shown in the figure) that the respective longitudinal beam 19 extends only over the upper partial height of the storage housing 12 formed by the vehicle floor 6 and the floor element 11. A further longitudinal beam 21 is connected to the respective longitudinal beam 19 from below, which further longitudinal beam is also connected to the respective longitudinal beam 19 from below. Figure 3 and 4The two longitudinal beams 19 and 21 are connected to the lower housing part or floor element 11 (visible). The two longitudinal beams 19 and 21 thus form a composite structure that extends over the entire height of the storage housing 12, that is, the entire distance between the floor element 11 and the vehicle floor 6. The two longitudinal beams 19 and 21 are connected to each other, for example, by a plurality of screw connections. As a result, the floor element 11 is also suspended from the underside of the vehicle floor 6. The corresponding battery modules 15 of the energy storage device 14 can be supported on the floor element 11 or themselves fastened to the underside of the vehicle floor 6 in a suspended arrangement.

[0033] In combination Figure 5 (The figure shows the vehicle floor 6 in a partial perspective view from above) It can be seen that the respective longitudinal beams 19 are fastened to the underside of the vehicle floor via their flanges 22, for example by corresponding welded connections or similar joint connections. Of course, other connections, in particular mechanical connections, are also conceivable. Figure 4 It can also be seen that the lower longitudinal member 21 has corresponding through-holes 23 and the associated upper longitudinal member 19 has blind holes 24, so that in the present case, the floor element 11 (which also has through-holes 25) can be screwed to the upper longitudinal member 19 using corresponding screws. In the present case, the corresponding battery modules of the energy storage device 14 are located on the floor element 11, which is fixed to the underside of the vehicle floor 6. However, a suspended arrangement of the energy storage device 14 on the underside of the vehicle floor 6 is also conceivable.

[0034] Figure 5 The detailed view, seen obliquely from above, shows an energy storage floor assembly with a vehicle floor 6. On the upper side of the vehicle floor, corresponding cross members extend in the vehicle transverse direction. Also visible are corresponding longitudinal members 19, which extend in the longitudinal direction and therefore at an angle of approximately 90 degrees to the cross member 10. The longitudinal members 19 extending on the underside of the vehicle floor 6 are shown here in dashed lines. In the region of the corresponding tabs 26, the cross member 10 is directly connected to the corresponding flange 22 of the corresponding longitudinal member 19 via corresponding welded connections or similar joints and / or mechanical connections. The flange 22 of the longitudinal member 19 is thus connected to the corresponding tab 26 of the cross member 10 via the vehicle floor 6. This quasi-direct connection of the longitudinal member 19 to the cross member 10 ensures that the cross member 10 is stabilized against bending when subjected to forces in the vehicle transverse direction caused by an accident.

[0035] Figure 6 and 7A perspective sectional view and an enlarged perspective sectional view illustrate the specific support or connection of one of its longitudinal beams 19 to a corresponding bracket member 33, which extends in the area of ​​the front end 3 of the vehicle. Unlike the previously shown embodiment, it should be noted that the longitudinal beam 19 now extends over the entire height of the energy storage device 14 or storage housing 12, which is formed and bounded on the top by the vehicle floor 6 and on the bottom by the floor element 11. Since the storage housing is thus also a housing integrated into the vehicle body, formed on the top by body components, primarily the vehicle floor 6, a region of the front end is correspondingly formed with a flange 27, an obliquely extending wall region 28, and an S-shaped region 29, which then transitions into a flat region 30 of the vehicle floor 6. The vehicle floor 6 can also be constructed in multiple parts. It is also conceivable that the front-facing boundary is formed by a separate component on the end face. In the present case, flange 27 of vehicle floor 6 is connected to a corresponding flange 31 of floor element 11, which also widens in a stepped manner downward in a region 32. In the present case, front end 20 of longitudinal member 19 is thus connected indirectly, i.e., via inclined region 28 of vehicle floor 6, to a bracket member 33 in the region of front end structure 3. In the present embodiment, bracket member 33 is, for example, a component of front end structure 3 that has an axle bracket connection or is an axle bracket part itself.

[0036] By supporting the bracket member 33 at least indirectly (in the present case, with or via the inclined region 28 of the vehicle floor 6 ), the bracket member 33 or axle bracket component is thus supported directly rearward in the vehicle longitudinal direction (x direction) on the corresponding longitudinal member 19 . This prevents excessive intrusion into the energy storage device, i.e., the energy storage device 14 or the associated storage housing 12 , when subjected to accident-induced forces in the front region. In other words, the attachment of the bracket member 33 to the underside of the vehicle floor and the longitudinal member 19 and their connection to the corresponding bracket profile, in particular the longitudinal profile of the front vehicle, to which the front axle is attached, prevents excessive intrusion into the energy storage device or associated components. The longitudinal member 19 in the underfloor region also supports the transverse member of the front end or front end structure 3 .

[0037] Reference Signs List

[0038] 1. Car body

[0039] 2 front end wall

[0040] 3 Front-end structure

[0041] 4 longitudinal beams

[0042] 5 Transition Zone

[0043] 6Vehicle floor

[0044] 7 side door sills

[0045] 8 Transition Zone

[0046] 9 Rear vehicle structure

[0047] 10 beams

[0048] 11 bottom plate components

[0049] 12 memory housing

[0050] 13 battery modules

[0051] 14Energy storage device

[0052] 15 battery pack

[0053] 16 pressure plates

[0054] 17 Clamping element

[0055] 18 airtight connectors

[0056] 19 longitudinal beam

[0057] 20 end

[0058] 21 longitudinal beam

[0059] 22 flange

[0060] 23 through holes

[0061] 24 blind holes

[0062] 25 through holes

[0063] 26 splices

[0064] 27 flange

[0065] 28 wall areas

[0066] 29 areas

[0067] 30 areas

[0068] 31 flange

[0069] 32 areas

[0070] 33 bracket components

Claims

1. An energy storage floor assembly for an electrically driven vehicle, comprising an electrical energy storage device (14) which is accommodated in a storage housing (12) and is arranged on the underside of a vehicle floor (6) of the energy storage floor assembly, characterized in that At least one longitudinal beam (19) is arranged within a storage housing (12) of an energy storage device (14), which is indirectly connected at at least one end (20) to a support member (33) of a vehicle arranged in the region of the front end (3), and an obliquely extending wall region (28) of the vehicle floor (6) is arranged between the longitudinal beam (19) and the support member (33).

2. The energy storage base plate assembly according to claim 1, characterized in that The vehicle floor (6) is designed as a housing part of a storage housing (12) and is connected to at least one lower housing part (11) of the storage housing (12) via at least one gas-tight connection (18).

3. The energy storage base plate assembly according to claim 2, characterized in that The at least one longitudinal beam (19) is fixed to the underside of the vehicle floor (6).

4. The energy storage base plate assembly according to claim 3, characterized in that The at least one longitudinal beam (19) is connected to a further longitudinal beam (21) arranged below the at least one longitudinal beam, which is connected to the lower housing part (11) of the accumulator housing (12).

5. The energy storage base plate assembly according to claim 3, characterized in that The at least one longitudinal beam (19) extends over the entire height of the accumulator housing (12) and is connected to the lower housing part (11) of the accumulator housing (12).

6. The energy storage base plate assembly according to any one of claims 1 to 5, characterized in that The longitudinal beam (19) is connected to at least one transverse beam (10) extending on the upper side of the vehicle floor (6).

7. The energy storage base plate assembly according to any one of claims 2 to 5, characterized in that The vehicle floor (6) and the at least one longitudinal member (19) are designed as part of a painted vehicle body-in-shell (1).

8. The energy storage base plate assembly according to any one of claims 1 to 5, characterized in that The vehicle floor (6) is inseparably connected to the at least one longitudinal beam (19).

9. The energy storage base plate assembly according to any one of claims 1 to 5, characterized in that The at least one longitudinal beam (19) is connected at least indirectly to a console component (33) of the motor vehicle without play.

10. The energy storage base plate assembly according to claim 8, characterized in that The vehicle floor (6) is connected to the at least one longitudinal beam (19) in a material-locking manner.

11. The energy storage base plate assembly according to claim 10, characterized in that The vehicle floor (6) is connected to the at least one longitudinal beam (19) by a welding connection or an adhesive connection.

12. The energy storage base plate assembly according to claim 9, characterized in that The at least one longitudinal beam (19) is inseparably connected at least indirectly to a console component (33) of the motor vehicle.

13. The energy storage base plate assembly according to claim 12, characterized in that The at least one longitudinal member (19) is connected at least indirectly to a console component (33) of the motor vehicle in a material-locking manner.

14. The energy storage base plate assembly according to claim 13, characterized in that The at least one longitudinal member (19) is at least indirectly connected to a console member (33) of the motor vehicle by means of a welded or adhesive connection.

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