Housing Element for an Electrical Energy Store of a Motor Vehicle and Motor Vehicle

Abstract

A housing element is provided for a storage housing of an electrical energy store of a motor vehicle, the electrical energy store being designed to store electrical energy and having a plurality of storage cells which can be arranged in a receiving space of the storage housing and in which the electrical energy is to be stored. The housing element has a baseplate, which is formed from a light metal and is provided at least in a subregion with a reinforcing plate formed from a steel and is reinforced by virtue of the reinforcing plate being adhesively bonded to the subregion of the baseplate by an elastomer.

Claims

1.-9. (canceled)

10. A housing element for a storage housing of an electrical energy store of a motor vehicle, the electrical energy store having a plurality of storage cells arrangeable in a receiving space of the storage housing, the housing element comprising: a baseplate made of a light metal; and at least in a subregion of the base plate, a reinforcing plate made of a steel, wherein the base plate is reinforced by the reinforcing plate; and an elastomer by which the reinforcing plate is adhesively bonded to the subregion of the baseplate.

11. The housing element according to claim 10, wherein the reinforcing plate is separated galvanically from the baseplate by the elastomer.

12. The housing element according to claim 11, wherein a maximum wall thickness of the baseplate is less than 5 millimeters.

13. The housing element according to claim 10, wherein a maximum wall thickness of the baseplate is less than 5 millimeters.

14. The housing element according to claim 10, wherein the baseplate has a further subregion which adjoins the subregion and the reinforcing plate, extends entirely around the subregion and the entire reinforcing plate, and is free from a reinforcing element.

15. The housing element according to claim 14, wherein the housing element has sidewalls which protrude over the baseplate and the reinforcing plate, such that the sidewalls and the reinforcing plate at least partially delimit the receiving space, at least one strut is arranged between the sidewalls and the baseplate, the strut extends continuously from one of the sidewalls as far as the other sidewall and thereby divides the receiving space into two subspaces, and the strut is connected to the sidewalls, wherein the sidewalls are connected to one another via the strut.

16. The housing element according to claim 15, wherein the strut is arranged on one part of the further subregion.

17. The housing element according to claim 10, wherein the housing element has sidewalls which protrude over the baseplate and the reinforcing plate, such that the sidewalls and the reinforcing plate at least partially delimit the receiving space, at least one strut is arranged between the sidewalls and the baseplate, the strut extends continuously from one of the sidewalls as far as the other sidewall and thereby divides the receiving space into two subspaces, and the strut is connected to the sidewalls, wherein the sidewalls are connected to one another via the strut.

18. The housing element according to claim 10, wherein the reinforcing plate is connected to the baseplate exclusively by adhesive bonding brought about by way of the elastomer.

19. The housing element according to claim 10, wherein the light metal is aluminum.

20. A motor vehicle comprising at least one housing element according to claim 10.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is a schematic perspective view of a housing element according to an embodiment of the invention for an electrical energy store of a motor vehicle;

[0019] FIG. 2 is a schematic perspective view of a baseplate, which is provided with reinforcing plates, of the housing element;

[0020] FIG. 3 is a schematic sectional view of the baseplate which is provided with the the reinforcing plates;

[0021] FIG. 4 is, in detail form, a schematic perspective view of the housing element;

[0022] FIG. 5 is a schematic top view of the housing element; and

[0023] FIG. 6 is a schematic and perspective bottom view of the housing element.

[0024] In the figures, identical or functionally identical elements are provided with the same reference signs.

DETAILED DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 shows, in a schematic perspective view, in particular in a schematic and perspective top view, a housing element 1 for an electrical energy store of a motor vehicle. This means that the motor vehicle, which is preferably in the form of a passenger motor vehicle, has, in its fully produced state, the electrical energy store mentioned, in or by means of which electrical energy or electric current can be stored or is stored. In addition, the motor vehicle has at least one electric machine by means of which the motor vehicle can be, in particular purely, electrically driven. In order to drive the motor vehicle by means of the electric machine, the electric machine is operated in a motor mode and therefore as an electric motor. For this purpose, the electric machine is provided with electrical energy which is stored in the energy store. The electric machine and the energy store are preferably high-voltage components, the respective electrical voltage, in particular electrical operating or nominal voltage, of which is preferably greater than 50 volts, in particular greater than 60 volts, and very preferably several hundred volts. The energy store is therefore also referred to, for example, as a high-voltage store.

[0026] The motor vehicle also has a self-supporting body which at least partially delimits a passenger compartment, also referred to as an interior, of the motor vehicle. People can stay in the passenger compartment when the motor vehicle is in motion. The body comprises a floor which is also referred to as body floor and by means of which the passenger compartment is at least partially, in particular at least predominantly or completely, delimited downward in the vertical direction of the vehicle.

[0027] The previously mentioned storage housing of the energy store comprises the housing element 1 which is formed separately from the body. Furthermore, the storage housing comprises at least one further housing element, not illustrated in the figures, which is, for example, in particular an integral, part of the body, which is also referred to as a body shell. The further housing comprises, for example, a part of the mentioned floor, wherein the part of the floor is also referred to as a floor element. The housing elements in each case partially delimit the receiving space, in particular in such a manner that the receiving space is completely formed or delimited by the housing elements. The energy store here has a plurality of storage cells which are also simply referred to as cells and in which the electrical energy can be stored or is stored. The storage cells are electrically connected to one another and thereby wired, for example, in parallel to and/or in series with one another. The storage cells are in each case at least partially, in particular at least predominantly or completely, arranged in the receiving space and therefore in the storage housing. A first number of the storage cells is assigned, for example, to a first storage module of the energy store, and therefore the first storage module comprises the first number of the storage cells. A second number of the storage cells is assigned, for example, to a second storage module of the energy store, and therefore the second storage module comprises the second number of the storage cells. The respective number is preferably greater than 1, in particular greater than 2. The energy store here can comprise a plurality of such storage modules, wherein the storage modules are in each case at least partially, in particular at least predominantly or completely, arranged in the receiving space and therefore in the storage housing.

[0028] The housing element 1, which is formed separately from the body, is at least partially, in particular at least predominantly or completely, arranged below the floor in the vertical direction of the vehicle, in particular in such a manner that the housing element 1 is at least partially, in particular at least predominantly or completely, covered by the floor upward in the vertical direction of the vehicle. The housing element 1 is at least indirectly, in particular directly, fastened to the floor from the bottom upward in the vertical direction of the vehicle. As a result, the housing elements are assembled or put together such that the housing elements form or delimit the receiving space, in particularly completely. Owing to the fact that at least part of the floor is used as the further housing element, the receiving space can be provided in a manner advantageous in terms of construction space and weight. In addition, the receiving space can be configured to be particularly large in a manner advantageous in terms of weight and construction space, and therefore a particularly large storage capacity of the energy store can be provided.

[0029] For example, the receiving space is at least partially, in particular at least predominantly or completely, delimited by the floor upward in the vertical direction of the vehicle. The receiving space is at least partially, in particular at least predominantly or completely, delimited by the housing element 1 downward in the vertical direction of the vehicle. The receiving space can be at least partially delimited by the body, in particular by the floor and/or by the housing element 1, forward in the longitudinal direction of the vehicle. Rearward in the longitudinal direction of the vehicle, the receiving space can be at least partially delimited by the body, in particular by the floor, and/or by the housing element 1.

[0030] In order now to be able to realize a particularly advantageous accident performance of the housing element 1 and therefore of the storage housing and of the energy store as a whole in a manner particularly advantageous in terms of weight and construction space, the housing element 1—as can be seen particularly readily in an overall view of FIGS. 2 and 3—has a baseplate 2 which is formed from a light metal and in the present case from a light metal alloy comprising the light metal. In the exemplary embodiment shown in the figures, the light metal is aluminum, and therefore the light metal alloy is an aluminum alloy. In addition, in the exemplary embodiment shown in the figures, the baseplate 2 is designed as a plane element, and therefore the baseplate 2 has a particularly substantially flat or two-dimensional extent. In addition, the baseplate 2 is preferably formed integrally.

[0031] The baseplate 2 is provided with respective subregions T which are spaced apart from one another and are consecutive along a spacing direction, shown by a double arrow 3 in FIGS. 1 and 2, and each have precisely one, preferably integrally formed reinforcing plate 4, and the baseplate is thereby reinforced. The respective, preferably integrally formed reinforcing plate 4 is formed from a steel, as a result of which the baseplate 2 is particularly advantageously reinforced. As can be seen from FIG. 3, the respective reinforcing plate 4 is adhesively bonded to the respective subregion T of the baseplate 2 and therefore to the baseplate 2 by means of an elastomer 5. It can be seen particularly readily from FIG. 3 that the elastomer 5, which is preferably elastically deformable per se, forms an in particular elastically deformable intermediate layer 6 which is arranged between the respective reinforcing plate 4 and the respective subregion T of the baseplate 2. The respective intermediate layers 6 are also only locally provided and are therefore arranged spaced apart from one another and consecutively along the spacing direction shown by the double arrow 3. In the fully produced state of the motor vehicle, the spacing direction coincides, for example, with the vehicle longitudinal direction. Furthermore, it is provided that the respective reinforcing plate 4 is separated galvanically from the baseplate 2 by means of the respective elastomer 5. In addition, the respective reinforcing plate 4 and therefore the respective elastomer 5 are arranged on an upper side 7 of the baseplate 2 which faces upward in the vertical direction of the vehicle or faces the interior. The upper side 7 faces away from a lower side 8 of the baseplate 2, with the lower side 8 facing downward in the vertical direction of the vehicle and therefore facing away from the receiving space and from the passenger compartment.

[0032] The respective reinforcing plate 4 is also designed as a plane element and therefore has a substantially flat extent. As a result of the local reinforcement of the baseplate 2 in the respective subregions T by means of the respective reinforcing plates 4, it is possible to provide a particularly small wall thickness for the baseplate 2. It is therefore preferably provided that the maximum or greatest wall thickness of the baseplate 2 is smaller than 5 mm. As a result, the requirement for construction space and the weight can be kept within a particularly small scope.

[0033] As can be seen particularly readily from FIG. 2, the baseplate 2 has, in particular per subregion T and therefore per reinforcing plate 4, a respective further subregion T2 which adjoins the respective subregion T and the respective reinforcing plate 4 there, extends around the entire respective subregion T and the entire respective reinforcing plate 4 and is free of a reinforcing element. As a result, the baseplate 2 is only locally reinforced in the subregions T by means of the reinforcing plates 4, as a result of which the weight and the requirement of the housing element 1 for construction space can be kept particularly low. As can be seen particularly readily from FIGS. 1 and 4, the housing element 1 has sidewalls 9 which are spaced apart from one another along a further spacing direction which is shown by a double arrow 10 and runs perpendicularly to the spacing direction shown by the double arrow 3. In the fully produced state of the motor vehicle, the further spacing direction coincides with the transverse direction of the vehicle. Along the further spacing direction and therefore in the transverse direction of the vehicle, the receiving space is in each case delimited at least partially on both sides by the sidewalls 9. In addition, the housing element 1 has end walls 11 which are spaced apart from one another along the first spacing direction, shown by the double arrow 3. For example, the end walls 11 are connected to the sidewalls 9. The receiving space is in each case at least partially delimited on both sides by the end walls 11 along the first spacing direction, shown by the double arrow 3, and therefore in the longitudinal direction of the vehicle.

[0034] The housing element 1 also has struts 12 which are also referred to as transverse struts. The transverse struts are arranged between the sidewalls 9 along the further spacing direction and the between the end walls 11 along the first spacing direction and which respectively have a profile running straight or rectilinearly in the transverse direction of the vehicle or along the further spacing direction. The sidewalls 9 and the end walls 11 also have a respective, straight or rectilinear profile. The respective transverse strut extends continuously along the further spacing direction from one of the sidewalls 9 as far as the respective other sidewall 9 and is attached at both ends to the sidewalls 9, as a result of which the sidewalls 9 are connected to one another via the transverse struts and via the end walls 11. The sidewalls 9, the end walls 11 and the struts 12 therefore form a frame 13 by means of which a particularly advantageous accident performance can be realized in a particularly advantageous manner in terms of construction space and weight. In particular, it can be seen that the sidewalls 9 and the end walls 11 delimit at least one part, referred to by TB in FIG. 1, of the receiving space of the storage housing, wherein the subregion TB is delimited on both sides by the end walls 11 along the first spacing direction, shown by the double arrow 3, and on both sides by the sidewalls 9 along the further spacing direction, shown by the double arrow 10. The transverse struts are spaced apart from one another and from the end walls 11 along the first spacing direction, as a result of which the part TB is subdivided along the first spacing direction by means of the transverse struts into respective multiple lower parts UT. It can be provided here that, for example, at least or precisely one of the previously mentioned storage modules is at least partially accommodated in the respective lower parts UT. Overall, it can be seen that the lower parts UT are subspaces into which the part TB or the receiving space as a whole is subdivided by means of the struts 12. In addition, the sidewalls 9 and the end walls 11 protrude over the baseplate 2 and the reinforcing plates 4. In particular, it is contemplated that the sidewalls 9 and the end walls 11 are arranged on the baseplate 2, in particular in such a manner that the end walls 11 and the sidewalls 9 directly touch the baseplate 2 or the upper side 7 thereof.

[0035] Furthermore, it can be seen particularly readily from FIGS. 4 and 5 that the respective strut 12 is arranged in a respective part TE of the respective further subregion T2 such that none of the reinforcing plates 4 is arranged between the respective strut 12 and the baseplate 2. It is contemplated here for the respective strut 12 to be supported or to lie directly on the baseplate 2 or on the upper side 7 thereof. In addition, it is provided that the respective reinforcing plate 4, which is preferably formed from sheet metal and very preferably from steel sheet, is connected to the baseplate 2, which is preferably formed from aluminum sheet, exclusively by adhesive bonding brought about by means of the respective elastomer 5. As a result, additional connecting elements for connecting the respective reinforcing plate 4 to the baseplate 2 can be avoided, and therefore the number of parts and thus the weight and the requirement for construction space can be kept particularly low.

List of Reference Signs

[0036] 1 housing element [0037] 2 baseplate [0038] 3 double arrow [0039] 4 reinforcing plate [0040] 5 elastomer [0041] 6 intermediate layer [0042] 7 upper side [0043] 8 lower side [0044] 9 sidewall [0045] 10 double arrow [0046] 11 end wall [0047] 12 strut [0048] 13 frame [0049] T subregion [0050] T2 subregion [0051] TB part [0052] UT lower part