WO2019202018A1 - Underrun-protection arrangement for a vehicle-battery arrangement, vehicle-battery arrangement, method for producing an underrun-protection arrangement, and method for producing a vehicle-battery arrangement - Google Patents

Abstract

The present invention relates to an underrun-protection arrangement (2) for a vehicle-battery arrangement (1), characterized in that the underrun-protection arrangement (2) comprises at least one first underrun-protection component (10) and a second underrun-protection component (20), wherein the first underrun-protection component (10) comprises a first, planar region (11) and a carrier region (12), wherein the first, planar region (11) has a main-extent plane (100) and the carrier region (12) has an extent in the direction of a surface normal (200) to the main-extent plane (100), wherein the first and second underrun-protection components (10, 20) are arranged at least to some extent adjacent to one another and/or have a region of overlap (30).

Description

 DESCRIPTION

title

 Underrun protection arrangement for a vehicle battery arrangement, vehicle battery arrangement, method for producing an underrun protection arrangement, method for producing a vehicle battery arrangement

State of the art

The present invention relates to an underrun protection arrangement for a vehicle battery arrangement. Furthermore, the present invention relates to a vehicle battery assembly comprising an underrun protection arrangement, a method for producing an underrun protection arrangement and a method for producing a vehicle battery arrangement.

The continuing electrification of vehicles, such as automobiles, and the desire for long ranges of such vehicles require powerful batteries that occupy a large volume in the vehicle and must be effectively protected from deformation in the event of an accident.

From the prior art it is known that an underrun protection from below acting loads supported in an accident. The underrun protection directs the loads, if necessary, via additional components, such as carriers, into an internal crash reinforcement structure. The underrun protection and the other components involved must be made of high strength materials so that high energy can be absorbed given the small amount of deformation space available. High-strength materials can be made thinner with the same performance, which can reduce weight or make better use of space or space due to higher energy absorption. In solutions known from the prior art, the underrun protection is essentially formed by a single, large, flat component which covers the battery module or the battery modules and their housing from below.

However, the production of such known components becomes increasingly difficult with increasing size of the battery case and increasing crash requirements and encounters constructive limits. Above all, the available sheet widths and the size of the forming tools and presses to be used are limiting. Disclosure of the invention

It is an object of the present invention to propose an underride protection arrangement for a vehicle battery assembly and a vehicle battery assembly, which enables improved possibilities in the implementation of large batteries or battery modules.

According to the invention, the object is achieved by an underrun protection arrangement for a vehicle battery arrangement, characterized in that the underrun protection arrangement comprises at least a first underrun protection component and a second underrun protection component, wherein the first underrun protection component comprises a planar first region and a carrier region, the planar first region has a main extension plane and the carrier region has an extension in the direction of a surface normal of the main extension plane, wherein the first and the second underrun protection component are arranged at least partially adjacent to each other and / or have an overlap region.

Preferably, at least one underrun protection component (the second underrun protection component) has a flat second region with a main extension plane.

This makes it possible according to the invention to provide a multi-part (at least two-part) underrun protection arrangement, whereby a (cost) efficient and modular pro duction, low tolerances, high crash safety and a low weight can be achieved. These advantages arise in particular with respect to a underrun protection, which is manufactured in one piece (or comprises only a single planar component), which brings with increasing size of the battery modules (or increasing number of battery modules) growing problems in the production and design with it.

According to the invention, it is possible for the underrun protection arrangement to comprise at least two elements, a first underrun protection component and a second underrun protection component, so that the underrun protection arrangement can advantageously be subdivided in the vehicle longitudinal direction or in the vehicle transverse direction and has a modular composition. It is preferably possible that the first and the second underride protection component each have a substantially flat region (first or second region), which cover the respective part of the battery housing from below. In particular, it is conceivable that the areal first area and / or the areal second area are swaged. According to the invention, it is preferably possible for the first underrun protection component to have a profiled region, or a carrier region, which produces a support to the bottom region of the battery housing and / or to the battery housing carrier. In this way, it is possible that with the aid of the carrier area loads are passed on in an accident to the battery housing or to a battery housing carrier and can thus be absorbed by a crash reinforcing structure.

Advantageous developments and embodiments will become apparent from the subclaims.

According to one embodiment of the present invention, it is provided that the second underrun protection component has a flat second region with a main extension plane. In particular, the areal first area and the areal second area are formed in the same plane.

According to one embodiment of the present invention, it is provided that the first and the second underrun protection component are at least partially joined adjacent to each other. As a result, according to an embodiment of the present invention, it is possible for the first and second underrun protection components to be fixedly connected to one another in a region in which they are arranged adjacent to one another by means of a joint.

According to one embodiment of the present invention, it is provided that the first and the second underrun protection component are connected in the overlapping area, in particular by means of a tab and / or a slot on the first and / or second underrun protection component. In general, various embodiments of connections between the first underrun protection component and the second underrun protection component in the overlap region are conceivable. It may be advantageous to use an adhesive or a sealant in the overlap region of the underrun protection components. This achieves watertightness and prevents corrosion.

According to one embodiment of the present invention, it is particularly preferably possible that the first underrun protection component has a slot and the second underrun protection component a pool (or vice versa), wherein by means of the tab and the slot a form-fitting connection, for example a clip connection is formed between the first and second underrun protection component. According to one embodiment of the present invention, it is provided that the first underrun protection component is integrally formed, wherein in particular the second underrun protection component is integrally formed. This makes it possible according to an embodiment of the present invention that a particularly advantageous modularity can be achieved, since the carrier region and the flat first region of the first underrun protection component are formed integrally. Thus, it is possible that the underride guard assembly is particularly advantageous modular by using one (or more) first underrun protection component and one (or more) second underrun protection component.

According to one embodiment of the present invention, it is provided that the underrun protection arrangement comprises a further first underrun protection component, wherein the second underrun protection component is arranged between the first underrun protection component and the further first underrun protection component. This makes it possible according to an embodiment of the present invention that a particularly advantageous modularity can be achieved. It is conceivable that the further first underrun protection component has the same features as the first underrun protection component. Alternatively, it is also conceivable that the further first underrun protection component has only a part of the features that the first underrun protection component comprises, and / or other additional features.

In particular, it is possible that further second underride protection components (for example one, two, three, four, five, etc., further second underride protection components) are arranged between the first underrun protection component and the further first underrun protection component. It is possible that the other second underride protection components have the same features as the second underrun protection component. However, it is also conceivable that the further second underrun protection components have only a part of the features that the second underrun protection component has, and / or other additional (possibly different) features.

For example, when using a total of four or more Unterschutzbautei- len (ie in particular a first, another first, a second and one or more other second Unterschutzbauteilen), the middle underrun protection components, ie the second and the second or the second Unterschutzbauteile, preferably geometrically identical. This allows for improved modularity, as the same underrun protection components can be used for battery cases of the same size of the battery modules but different numbers of modules. It is possible that the at least two underrun protection components (that is, for example, the first and the second underrun protection component or also one or more of the further underrun protection components) have different thicknesses and / or grades, which allows better adaptation and thus weight reduction. So z. For example, the particularly endangered area at the front (in the direction of travel) end of the battery housing can be equipped with a thicker underrun protection component.

According to one embodiment of the present invention, it is provided that the first and second underrun protection component have different thicknesses and / or grades.

According to one embodiment of the present invention, it is provided that the first and second underrun protection components are made of a steel having a tensile strength of at least 750 MPa or of aluminum. Correspondingly, the other underrun protection components can also be made of a steel with a tensile strength of at least 750 MPa or of aluminum.

Particularly preferably, the at least two underrun protection components can be made in particular of a steel having a tensile strength of at least 750 MPa, preferably of a steel having a tensile strength of at least 1150 MPa. Alternatively, the at least two underrun protection components may be made of aluminum.

Another object of the invention is a vehicle battery assembly comprising an underrun protection arrangement according to one of the embodiments of the present invention.

According to one embodiment of the present invention, it is provided that the vehicle battery assembly comprises a battery housing, wherein by means of the support portion, a connection between the underrun protection arrangement and the battery housing, in particular between the underrun protection arrangement and a battery housing carrier of the Batie teriegehäuses formed, wherein the connection between the Unterfahrschutzanord- and the battery housing in particular by means of a connecting means, preferably a screw or a bolt with nut is formed. As a result, according to an embodiment of the present invention, it is possible for the battery housing (in particular a battery housing carrier or a bottom of the battery housing carrier) to be connected to the first underrun protection component, whereby a connection is established between the underrun protection arrangement and the battery housing. Thus, in the case of an accident, a load can be transmitted to the battery housing carrier via the carrier area. the. Conceivable, in principle, other connection means / fasteners as a screw or bolt with nut.

According to one embodiment of the present invention, it is provided that the first and the second underrun protection component are connected in the overlapping area by means of the connecting means or another connecting means, in particular a further screw or a further bolt with nut. In this way, according to an embodiment of the present invention, it is possible that a connection between the first underride protection component and the second underrun protection component is also formed by means of the same connection means used to connect the carrier region of the first underrun protection component to the battery housing , It is also conceivable that the first underrun protection component and the second underrun protection component are connected to one another with a separate (that is not the same) connecting means.

According to one embodiment of the present invention, it is provided that the carrier area extends in the direction of the surface normal of the main extension plane from the areal first area to the battery housing, in particular to the battery housing carrier of the battery housing. As a result, according to an embodiment of the present invention, it is possible for the carrier region to pass on a load, which acts on the areal first area or the areal second area, to the battery housing and in particular to the battery housing carrier.

According to one embodiment of the present invention, it is provided that the Unterfahrschutzanordnung is connected to a frame of the battery case, in particular screwed.

According to one embodiment of the present invention, it is provided that the underrun protection arrangement covers a bottom area of the battery housing. As a result, it is preferably possible for the entire bottom area of the battery housing to be covered and protected by the underrun protection arrangement.

According to one embodiment of the present invention, it is possible that the planar first region of the first underrun protection component and the planar second region of the second underride protection component are arranged at least partially adjacent to one another. It is conceivable that in the (or at the edge of) the overlapping region and / or where the first and the second underrun protection component are joined together, a shoulder is formed in the first or second underrun protection component. With the help of this paragraph, the areal first area and the area second area directly adjacent to each other, in particular gapless, are arranged.

Another object of the invention is a method for producing an underrun protection arrangement according to an embodiment of the present invention, wherein the first underrun protection member and the second underride protection member are at least partially disposed adjacent to each other and / or arranged so that they have an overlap region. The support region of the underride protection components is preferably ideally located below the battery modules between two modules.

Another object of the invention is a method for producing a Fahrzeugbat- terieanordnung according to an embodiment of the present invention, wherein the Unterfahrschutzanordnung according to a method for producing an underrun protection arrangement according to an embodiment of the present invention is made.

It is possible that the first and the second underride protection component (and possibly the other first and / or second underride protection components) are connected / joined together and so the underrun protection arrangement is formed before the Unterfahrschutzanord- voltage is connected to the battery case (for example, screwed) , Alternatively, however, it is also conceivable that the first underrun protection component is first connected to the battery housing carrier and subsequently the second underrun protection component is connected to the first underrun protection component (for example, if a tab and a slot are present on the first and second underrun protection components).

For the vehicle battery arrangement according to the invention, the method according to the invention for producing an underrun protection arrangement and the method according to the invention for producing a vehicle battery arrangement, the features, configurations and advantages can be used that are associated with the underrun protection arrangement according to the invention or in connection with an embodiment of the underrun protection arrangement according to the invention have been described.

For the underride protection arrangement according to the invention, the features, configurations and advantages can be used, which in connection with the vehicle battery assembly according to the invention, the inventive method for producing a Unterfahrschutzanordnung and the inventive method for producing a vehicle battery assembly or in connection with an embodiment of Inventions In accordance with the invention, a vehicle battery arrangement has been described, an embodiment of the method according to the invention for producing an underrun protection arrangement and an embodiment of the method according to the invention for producing a vehicle battery arrangement.

Further details, features and advantages of the invention will become apparent from the drawings, as well as from the following description of preferred embodiments with reference to the drawings. The drawings illustrate only exemplary embodiments of the invention, which do not limit the inventive concept.

Brief description of the figures

FIG. 1 shows a schematic illustration of a vehicle battery arrangement comprising an underrun protection arrangement according to embodiments of the present invention.

FIG. 2 shows a schematic representation of a vehicle battery arrangement comprising an underrun protection arrangement according to a first embodiment of the present invention.

FIG. 3 shows a schematic representation of a vehicle battery arrangement comprising an underrun protection arrangement according to a second embodiment of the present invention.

Figure 4 shows schematic representations of a vehicle battery assembly comprising an underrun protection arrangement according to a third embodiment of the present inven tion.

FIG. 5 shows a schematic representation of a vehicle battery arrangement comprising an underrun protection arrangement according to a fourth embodiment of the present invention.

FIG. 6 shows schematic representations of a vehicle battery arrangement comprising an underrun protection arrangement according to a fifth embodiment of the present invention. FIG. 7 shows schematic representations of a vehicle battery arrangement comprising an underrun protection arrangement along a second cross-sectional line according to exemplary embodiments of the present invention.

Figure 8 shows schematic representations of a vehicle battery assembly comprising an underrun protection arrangement along a second cross-sectional line according to further exemplary embodiments of the present invention.

Embodiments of the invention

FIG. 1 shows a schematic representation of a vehicle battery arrangement 1 comprising an underrun protection arrangement 2 according to embodiments of the present invention. Shown is a view from above, based on the mounting position in the vehicle. The first cross-sectional line 40-40 and the second cross-sectional line 50-50 are emphasized. The following drawings relate to the first and second cross-sectional lines 40-40, 50-50 shown here. Both cross-sectional lines 40-40, 50-50 extend in this respect. sem case transverse to the direction of travel / vehicle axle of a vehicle on which the Fahrzeugbat- terieanordnung 1 is arranged. However, it is generally also possible that the cross-sectional lines 40-40, 50-50 extend along the direction of travel / vehicle axis. The following exemplary embodiments (FIGS. 2 to 8) can therefore also be understood so that the cross-sectional lines 40 - 40, 50 - 50 run along the direction of travel / vehicle axis.

FIG. 2 shows a schematic illustration of a vehicle battery arrangement 1 comprising an underrun protection arrangement 2 according to a first embodiment of the present invention. 2 shows a cross-sectional view along the first cross-sectional line 40-40. The vehicle battery assembly 1 comprises a battery module 9 (with vehicle battery). The battery module 9 is arranged in the battery case 3. The battery housing 3 comprises a frame 7, a bottom region 8 and a battery housing carrier 4. It is preferably possible that in the battery case 3, yet another or more battery modules 9 are arranged (not shown) and corresponding to a further or more battery housing carrier 4 are formed. Essentially below the floor area 8, the underrun protection arrangement 2 is arranged, which protects the battery housing 3 from below (ie from the direction of the roadway). The underride protection arrangement 2 comprises a first underrun protection component 10 and a second underrun protection component 20. The first underrun protection component 10 comprises a flat first region 11 and a carrier region 12. The first underrun protection component 10 and the second Underride protection component 20 are each formed in one piece. The support region 12 has an extent within the main extension plane 100 of the flat first region 1 1 and also an extension perpendicular to this main extension plane 100 in the direction of the surface normals 200 of the main extension plane 100. In the direction of the surface normal 200, the support region 12 extends from the surface flat first area 11 up to the battery housing support 4 or to the floor area 8 in the region of the battery housing support 4. By means of a connecting means, for example a screw 5 or a bolt 6 with nut (or several screws 5 or bolt 6 with nut), a connection between the support portion 12 and the bottom portion 8 of the battery case carrier 4 is formed. Furthermore, the first underrun protection component 10 is connected to the frame 7, in particular in the planar first region 11. A planar second region 21 of the second underrun protection component 20 is arranged directly adjacent to an offset 13 formed in the areal first region 11 (below the carrier region 12). With the aid of the offset 13 and the first and second areal regions 11, 21, an extended cover of the battery housing 3 is thus formed. In the region of the offset 13, the first underrun protection component 10 and the second underride protection component 20 are preferably joined together, for example by a laser welding connection. It is conceivable that a further battery module 9 is arranged essentially above the flat second region 21 (not shown). Thus, a large battery case 3 comprising a plurality of battery modules 9 can be efficiently protected by means of the underrun protection device 2. Furthermore, a cooling 70 is arranged between the underride protection arrangement 2 and the battery housing 3, in particular in the region below the battery module 9. In the production of the first embodiment, it is preferred that the underride protection components 10, 20 are first joined together and the resultant Underride protection assembly 2 is then connected to the battery case 3 (or to the bottom portion 8 and the frame 7).

FIG. 3 shows a schematic representation of a vehicle battery arrangement 1 comprising an underrun protection arrangement 2 according to a second embodiment of the present invention. 3 shows a cross-sectional view along the first cross-sectional line 40-40. The second embodiment essentially comprises the features illustrated and described in the course of the first embodiment (FIG. 2). In contrast to the first embodiment, however, the first underrun protection member 10 and the second underrun protection member 20 are formed differently. In the second embodiment, the offset 13 is formed directly between the flat part of the flat first portion 11 and the support portion 12 within the first underrun protection member 10. The second underrun protection component 20, in particular the flat second region 21, is rich of the offset 13 adjacent to the flat first region 11 formed and preferably joined with this. The areal area 21 thus extends below the support area 12 and closes it from below.

FIG. 4 shows schematic representations of a vehicle battery arrangement 1 comprising an underrun protection arrangement 2 according to a third embodiment of the present invention.

On the left side of FIG. 4, a cross-sectional view along the first cross-sectional line 40-40 is shown. The cross-sectional view along the first cross-sectional line 40-40 of the third embodiment substantially comprises the features illustrated and described in the cross-sectional representation along the first cross-sectional line 40-40 of the first embodiment in FIG. In contrast, however, the first underrun protection member 10 and the second underrun protection member 20 are formed differently along the first cross-sectional line 40-40 in the third embodiment. In the third embodiment, no offset 13 is formed along the first cross-sectional line 40 - 40 in the first underrun protection component 10. The second underrun protection component 20, in particular the flat second region 21, extends below the carrier region 12 as far as the flat first region 11. The carrier region 12 is arranged directly and without offset on the flat first region 11.

On the right side of FIG. 4, a cross-sectional view along the second cross-sectional line 50-50 is shown. In this area, the second underrun protection component 20 and in particular the flat second region 21 comprises a region along the surface normal 200 in the direction of the battery case carrier 4. In particular, this patchy region of the second underride protection component 20 is arranged below a subregion of the carrier region 12 and adjoins it directly, so that an overlap region 30 is formed. In this overlapping area 30, the first and the second underbody protection components 10, 20 have common screw points by means of which the first and the second underride protection components 10, 20 can be firmly connected. These screw points are arranged below the connection of the carrier region 12 with the bottom region 8 of the battery case carrier 4. This makes it possible that with the aid of a screw 5 or a bolt 6 with nut, a connection between the first lower protection component 10, second lower protection component 20 and battery housing support 4 is formed. Alternatively or additionally, one or more further screws / bolts can be used for the connection between the first and second underrun protection component 10, 20. In the course of the third In particular, it is possible to dispense with additional joining of the first and second underride protection components 10, 20.

FIG. 5 shows a schematic illustration of a vehicle battery arrangement 1 comprising an underrun protection arrangement 2 according to a fourth embodiment of the present invention. Shown is a cross-sectional view along the first cross-sectional line 40-40. The fourth embodiment essentially comprises the features illustrated and described in the course of the first embodiment (FIG. 2). In contrast to the first embodiment, however, the first underrun protection member 10 and the second underrun protection member 20 are formed differently. In particular, an offset 13 is formed on the flat first region 11 below the carrier region 12. The flat second region 21 adjoins this offset 13 and comprises an extension below the carrier region 12. As a result, an overlap region 30 is formed between the first and second underbody protection components 10, 20. In this overlapping region 30, the first and the second underrun protection component 10, 20 have common screw points by means of which the first and the second underrun protection component 10, 20 can be firmly connected. These screw points are arranged below the connection of the carrier region 12 to the base region 8 of the battery housing carrier 4. As a result, it is possible for a connection between the first underside protection component 10, the second underprotection component 20 and the battery housing support 4 to be formed by means of a screw 5 or a bolt 6 with a nut. Alternatively or additionally, one or more further bolts / bolts with nut can be used for the connection between the first and second underbody protection components 10, 20. In the course of the fourth embodiment, it is possible in particular to dispense with an additional joining of the first and second underride protection component 10, 20 or on joining points 60.

FIG. 6 shows schematic representations of a vehicle battery arrangement 1 comprising an underrun protection arrangement 2 according to a fifth embodiment of the present invention.

On the left side of FIG. 6, a cross-sectional view along the first cross-sectional line 40-40 is shown. The cross-sectional view along the first cross-sectional line 40-40 of the fifth embodiment essentially comprises the features illustrated and described in the cross-sectional representation along the first cross-sectional line 40-40 of the first embodiment in FIG. In contrast, however, the first underrun protection member 10 and the second underrun protection member 20 are formed differently along the first cross-sectional line 40-40 in the fifth embodiment. Especially an offset 13 is formed on the planar first region 11 below the carrier region 12. The flat second region 21 comprises an extension below the carrier region 12 up to the offset 13 (and optionally beyond). As a result, an overlapping region 30 is formed between the first and second underrun protection components 10, 20. In the region of the offset 13, the first underrun protection component 10 comprises a slot 32. The second underrun protection component 20 has a corresponding tab 31 on the flat second region 21. By means of the tab 31 and the slot 32, a plug connection between the first and second underrun protection component 10 is formed.

On the right side of FIG. 6, a cross-sectional view along the second cross-sectional line 50 - 50 shown according to the fifth embodiment of the present invention is shown. Unlike along the cross-sectional line 40-40 (left side of FIG. 6), the flat first region 11 below the carrier region 12 is curved / embossed partially upwards (thus in the direction of the battery housing carrier 4). In particular, common screw points for the bottom region 8 of the battery carrier 4 and the carrier region 12 and the curvature of the flat first region 11 are thus formed. By means of the flat second region 21, the screw connection formed in this way and the curvature / embossment are covered downwards.

In the production of the fifth embodiment, it is possible for the first underrun protection component 10 to be screwed first to the battery housing 3 (or the floor area 8 and possibly the frame 7) and the second underrun protection component 20 subsequently to be screwed by means of the tab 31 and the Slot 31 is plugged together with the first underride protection component 10. Thereafter, the second underrun protection component 20 can then likewise be screwed to the battery housing 3 (for example via a further carrier region of the second underrun protection component 20). If necessary, this process can then be repeated with further underrun protection components, so that a large number of first and second underrun protection components can be connected to one another and can be modularly assembled one after the other. By such a construction, maintenance or replacement of one of the underrun protection components can be carried out particularly efficiently.

FIG. 7 shows schematic representations of a vehicle battery assembly 1 comprising an underrun protection arrangement 2 along a second cross-sectional line 50-50 according to exemplary embodiments of the present invention.

The exemplary embodiments illustrated in FIG. 7 along the second cross-sectional line 50 - 50 can be arbitrarily combined with the embodiments shown in FIGS. 2 to 6. (in particular with the embodiments along the first cross-sectional line 40-40) combine.

In the first exemplary embodiment (left-hand part of FIG. 7), the planar first region 11 is curved / embossed below the carrier region 12 partially upwards (ie in the direction of the battery case carrier 4). In particular, common screw points are thus formed for the bottom region 8 of the battery carrier 4 as well as the carrier region 12 and the bulging / embossing of the flat first region 11. Thus, a connection between the base region 8 and the carrier region 12 and the embossed / curved region of the flat first region 11 can be produced with the aid of a welding bolt 6 or a screw 5 with nut. The planar second region 21 is arranged on an offset 13 which is formed adjacent to the edge of the embossed region of the first region 11, and is connected there to the first underprotective component 10. The second region 21 thus does not extend below the embossed / curved region of the first region 11.

In the second exemplary embodiment (middle part of FIG. 7), the flat first region 11 comprises a hole which is arranged below (with respect to the surface normal 200) of the screw 5 or of the welding stud 6 with nut. By means of the welding bolt 6 or the screw 5 with nut, a connection is made between the bottom area 8 and the support area 12.

In the third exemplary embodiment (right-hand part of FIG. 7), the second underride protection component 20 and in particular the planar second region 21 comprise a region displaced along the surface normal 200 in the direction of the battery housing carrier 4. In particular, this offset region of the second underrun protection component 20 is arranged below a partial region of the carrier region 12 and adjoins it directly, so that an overlapping region 30 is formed. In this overlapping region 30, the first and the second underrun protection component 10, 20 have common screw points by means of which the first and the second underrun protection component 10, 20 can be firmly connected. These screw points are arranged below the connection of the support portion 12 with the bottom portion 8 of the battery case support 4, so that common screw points are formed. This makes it possible for a connection between the first underride protection component 10, the second underrun protection component 20 and the battery housing support 4 to be formed by means of a screw 5 or a bolt 6. Alternatively or additionally, one or more further bolts / bolts with nut can be used for the connection between the first and second underride protection component 10, 20. FIG. 8 shows schematic representations of a vehicle battery assembly 1 comprising an underrun protection arrangement 2 along a second cross-sectional line 50-50 according to further exemplary embodiments of the present invention. The focus here is on the connection between the first underrun protection component 10 and the second underrun protection component 20 and the connection of the first underrun protection component 10 to the bottom region 8 of the battery housing carrier 4.

The exemplary embodiments illustrated in FIG. 8 along the second cross-sectional line 50 - 50 can be combined as desired with the embodiments shown in FIGS. 2 to 7.

In cases where a single underride protection component 10, 20 (in particular the first underrun protection component 10) forms a closed profile, this is preferably joined, for example by means of laser welding.

In the first further exemplary embodiment (left-hand part of FIG. 8), the first and second underride protection components 10, 20 are connected by means of a joint 60 in the region of an offset 13 of the first underrun protection component 10. Furthermore, the profile of the first underbody protection component 10 which is closed by the carrier region 12 and the flat first region 11 is joined to a further joint 61.

In the second further exemplary embodiment (middle part of FIG. 8), the first and second underrun protection components 10, 20 are firmly screwed to the bottom area 8 of the battery housing carrier 4 via common screw points. For this purpose, screw points are provided in the overlapping area 30 of the first and second underrun protection components 10, 20. Furthermore, the profile of the first underrun protection component 10 which is closed by the carrier region 12 is joined to a further joint 61.

In the third further exemplary embodiment (right-hand part of FIG. 8), an overlapping area 30 is formed with the aid of the first and second underride protection components 10, 20. There, the first underrun protection component 10 has a slot 32 and the second underrun protection component 20 has a tab 31. By means of the tab 31 and the slot 32, a form-locking connection, for example a clip connection, is formed between the first and second underrun protection component 10, 20, so that an additional joining point 60 can be dispensed with. The first areal region 1 1 of the first underrun protection component 10 comprises an embossment / curvature which is below the carrier area 12 is arranged. In particular, common screw points for the bottom region 8 of the battery carrier 4 and the carrier region 12 and the curvature of the flat first region 11 are thus formed. With the aid of a welding bolt 6 or a screw 5 and a nut, a connection between the base region 8 and the carrier region 12 as well as the embossed / curved region of the flat first region 11 can thus be produced. The flat second region 21 covers the curvature and thus the connection between the first underrun protection component 10 and battery housing support 4 (or bottom region 8) from below. As a result of the positive connection, for example the clip connection, between the first underrun protection component 10 and the second underrun protection component 20, the two underrun protection components 10, 20 can be detached from one another in a simple manner so that individual parts can be removed / replaced / maintained.

LIST OF REFERENCE NUMBERS

1 vehicle battery assembly

 2 Underride protection arrangement

3 battery case

 4 battery case carrier

 5 screw

 6 bolts

7 frames

8 floor area

 9 battery module (with vehicle battery)

10 first underride protection component 1 1 first area

12 carrier area

13 offset

 20 second underrun protection member 21 second area

 30 overlap area

 31 tab

32 slot

 40 first cross-sectional line

50 second cross-section line

60 joints

61 further joints

70 cooling

 100 main extension plane

200 surface normals

Claims

1. Underride protection arrangement (2) for a vehicle battery assembly (1), character- ized in that the underrun protection arrangement (2) at least a first underrun protection component (10) and a second underrun protection component (20), wherein the first underrun protection component (10) a planar first region (1 1) and a carrier region (12), wherein the planar first region (11) has a Haupterstre- ckungsebene (100) and the carrier region (12) an extension in the direction of a surface normal (200) of the main extension plane (100 ), wherein the first and second underrun protection component (10, 20) are arranged at least partially adjacent to each other and / or have an overlap region (30). 2. Underride protection arrangement (2) according to claim 1, wherein the second underrun protection component (2) has a flat second region (21) with a main extension plane (100). 3. Underride protection arrangement (2) according to one of the preceding claims, wherein the first and the second underrun protection component (10, 20) are joined at least partially adjacent to each other. 4. Underride protection arrangement (2) according to one of the preceding claims, wherein the first and the second underride protection component (10, 20) in the overlap region (30) are connected, in particular by means of a tab (31) and / or a slot (32 ) on the first and / or second underrun protection component (10, 20). 5. Underride protection arrangement (2) according to one of the preceding claims, wherein in the overlap region (30) of the underride protection components (10, 20) an adhesive and / or a sealant is used. 6. Underride protection arrangement (2) according to one of the preceding claims, wherein the first underrun protection component (10) is integrally formed, wherein in particular the second underrun protection component (20) is integrally formed. 7. Underride protection arrangement (2) according to one of the preceding claims, wherein the Unterfahrschutzanordnung (2) comprises a further first underrun protection component, wherein the second underrun protection component (20) between the first underrun protection component (10) and the further first underrun protection component is arranged. 8. Underride protection arrangement (2) according to one of the preceding claims, wherein the first and second underrun protection component (10, 20) have different thicknesses and / or qualities. 9. Underride protection arrangement (2) according to any one of the preceding claims, wherein the first and second underride protection member (10, 20) made of a steel having a tensile strength of at least 750 MPa or made of aluminum. 10. A vehicle battery assembly (1) comprising an underrun protection arrangement (2) according to one of the preceding claims. 1 1. The vehicle battery assembly (1) according to claim 10, wherein the Fahrzeugbatterieanord- (1) comprises a battery housing (3), wherein by means of the support portion (12) a connection between the underrun protection arrangement (2) and the battery housing (3), in particular between the underride protection arrangement (2) and a battery housing carrier (4) of the battery housing (3), wherein the connection between the underrun protection arrangement (2) and the battery housing (3) is made in particular by means of a connection means, preferably a screw (5). or a bolt (6) with nut is formed. 12. The vehicle battery assembly (1) according to any one of claims 10 or 11, wherein the first and the second underride protection member (10, 20) in the overlap region (30) by means of the connecting means or another connecting means, in particular a further screw or a further bolt Mother, are connected. 13. Vehicle battery assembly (1) according to any one of claims 10 to 12, wherein the carrier region (12) in the direction of the surface normal (200) of the main extension plane (100) from the flat first region (11) to the battery case (3), esp - Special to the battery case support (4) of the battery case (3) extends. 14. The vehicle battery assembly (1) according to any one of claims 10 to 13, wherein the Unfahrfahrschutzanordnung (2) with a frame (7) of the battery case (3) is connected, in particular screwed. 15. The vehicle battery assembly (1) according to any one of claims 10 to 14, wherein the Unfahrfahrschutzanordnung (2) covers a bottom portion (8) of the battery case (3). 16. A method for producing an underrun protection arrangement according to one of claims 1 to 9, wherein the first underrun protection component (10) and the second underrun protection component (20) are arranged at least partially adjacent to one another and / or arranged such that they have an overlap region (30). 17. A method of manufacturing a vehicle battery assembly according to any one of claims 10 to 15, wherein the underride guard assembly (2) is made according to a method of manufacturing an underrun protection assembly according to claim 16.