Battery system for a motor vehicle that is at least partially electrically powered

Abstract

Battery device (1), in particular high-voltage energy storage device (101), for a motor vehicle (100) that is at least partially electrically powered, comprising at least one receiving device (2) for providing at least one receiving space (12) for at least one battery module (102) with at least one battery cell (103), wherein the receiving device (2) comprises at least one upper substructure (3) which at least partially delimits the receiving space (12) at least upwards and / or laterally, and wherein the receiving device (2) comprises at least one lower substructure (4) which at least partially delimits the receiving space (12) at least downwards. wherein the lower substructure (4) comprises at least one planar upper component (5) and at least one planar lower component (6) and at least one reinforcing component (7) arranged between the upper component (5) and the lower component (6) and designed as a hollow profile (17), characterized by that the upper substructure (3) provides at least one battery frame structure (13) and that the at least one battery module (102) is attached to the battery frame structure (13). and that the lower substructure (4) provides at least one battery housing base (14) and that the at least one battery module (102) is not attached to the battery housing base (14).

Description

[0001] The present invention relates to a battery device for an at least partially electrically powered motor vehicle and to a motor vehicle having such a battery device. The battery device comprises at least one receiving device for providing at least one receiving space for at least one battery module with at least one battery cell.

[0002] The batteries of electric or hybrid vehicles often consist of battery cells grouped together to form battery modules. The battery modules are typically interconnected and housed in a housing, often referred to as a battery case. This housing is often located in the floor area of ​​the vehicle.

[0003] The design of the mounting device is generally of particular importance. Firstly, the battery modules must be mounted reliably and safely. This applies both to the loads expected during driving and to special events such as driving over objects or a crash. Furthermore, installation should be straightforward and cost-effective. Furthermore, the mounting device should not adversely affect the weight of the battery.

[0004] DE 10 2015 111 749 A1 describes an underbody battery for electric vehicles in which a bulkhead runs beneath the battery modules and a base plate is arranged below the bulkhead. The modules are mounted on the bulkhead.

[0005] DE 10 2011 119 540 A1 shows a battery that is installed in the vehicle floor and surrounded by a support structure. The support structure is decoupled from the battery, so that the support structure is displaced in the event of a crash, while the battery remains in place.

[0006] US 2015 / 0249240 A1 describes an underbody battery for electric vehicles with a multi-layered base to which the battery modules are bolted. A wave-like layer in the base is designed to absorb impact energy.

[0007] It is therefore the object of the present invention to provide an improved receptacle for a battery device for an at least partially electrically powered motor vehicle. Preferably, the receptacle should particularly advantageously fulfill the aforementioned requirements.

[0008] This object is achieved by a battery device having the features of claim 1 and a motor vehicle according to claim 14. Preferred developments are the subject of the subclaims. Further advantages and features of the present invention will become apparent from the general description and the description of the exemplary embodiment.

[0009] The battery device according to the invention is designed in particular as a high-voltage energy storage device. The battery device is intended for an at least partially electrically operated motor vehicle. The battery device comprises at least one receiving device for providing at least one receiving space for at least one battery module with at least one battery cell. The receiving device comprises at least one upper partial structure which at least partially delimits the receiving space at least upwards and / or laterally. The receiving device comprises at least one lower partial structure which at least partially delimits the receiving space at least downwards. The lower partial structure comprises at least one essentially flat upper component and at least one essentially flat lower component.The lower substructure comprises at least one reinforcing component arranged between the upper component and the lower component and configured as a hollow profile. The upper substructure provides at least one battery frame structure. The at least one battery module is attached to the battery frame structure. The lower substructure provides at least one battery housing base. The at least one battery module is not attached to the battery housing base.

[0010] The battery device according to the invention offers many advantages. A significant advantage is the multi-part assembly of the lower substructure. Thus, the deformation behavior can be specifically influenced through the arrangement and geometric design of the components, and preferably the reinforcement component. This enables a particularly requirement-oriented and lightweight design. Furthermore, the battery device according to the invention can be manufactured and assembled particularly easily and cost-effectively thanks to the multi-part assembly.

[0011] In particular, the receiving space is enclosed at least at the top and / or sides by the upper substructure. In particular, the receiving space is enclosed at least at the bottom by the lower substructure.

[0012] Preferably, the lower substructure is formed by the lower component and the upper component and the reinforcing component.

[0013] Preferably, the upper component and the lower component are directly connected to one another at least in sections, at least in their edge regions and preferably in the region of at least one of their side edges. The upper component and the lower component can also be connected to one another at least in sections in other regions, for example, along central regions. The upper component and the lower component can also be connected to one another at least in sections in their edge regions via the reinforcing component.

[0014] Preferably, the reinforcing component is at least partially connected to the upper component and / or to the lower component. In particular, the upper component and the lower component are connected to one another at least in sections via the reinforcing component.

[0015] Particularly preferably, the lower substructure is connected to the upper substructure in a removable manner. Such a removable connection offers many advantages. A particularly advantageous feature is that it significantly improves the dimensional accuracy of the receiving device or the battery device. For example, such a removable connection offers significant advantages over welding. Welding a floor to a battery frame structure is generally very complex and often causes considerable welding distortion. This significantly impairs the flatness of the floor. Furthermore, such a removable connection also significantly improves the accessibility of the battery device, thus significantly simplifying assembly and maintenance.

[0016] The lower substructure is, in particular, detachably connected to the upper substructure in a non-destructive manner. However, the lower substructure can also be firmly connected to the upper substructure. It is possible for the upper component and the lower component, and the at least one reinforcing component, to be removable from the upper substructure as a single unit. It is also possible for the upper component and the lower component, and the at least one reinforcing component, to be at least partially removable individually.

[0017] Preferably, the lower substructure is connected to the upper substructure by means of at least one screw connection and / or at least one adhesive connection. Other connection types are also possible. A combination of a screw connection and an adhesive connection and / or at least one other connection type is particularly preferred. The adhesive connection is particularly suitable and designed for non-destructive disassembly of the components. Such connection types enable a particularly reliable and, at the same time, inexpensive assembly and disassembly.

[0018] In a particularly advantageous embodiment, the battery device comprises at least one sealing device for sealing, and in particular for watertight sealing, the lower substructure from the upper substructure. The sealing device comprises, in particular, at least one seal and / or at least one sealing hose and / or at least one rubber seal or the like. It is also preferred that the sealing device comprises at least one adhesive connection, for example in the form of at least one adhesive bead. In particular, the sealing device serves to seal against water and / or other media occurring during operation of the battery device. Such a sealing device offers significant savings in effort and costs during assembly and production. For example, expensive and complex sealing welds can be eliminated.

[0019] It is preferred that the lower substructure be bonded to the upper substructure by means of at least one thick-film adhesive. The thick-film adhesive is used in particular in the form of at least one adhesive bead or is designed as an adhesive bead. In particular, the thick-film adhesive is suitable and designed to establish an adhesive bond and / or to provide a sealing device for the lower substructure to the upper substructure.

[0020] In particular, the thick-film adhesive both connects and seals the lower substructure to the upper substructure. This enables sealing and bonding in a single, uncomplicated step. For example, a thick-film adhesive is provided, similar to that used as a windshield adhesive in automotive construction.

[0021] It is preferred that the upper component and / or the lower component and / or the reinforcing component is made at least partially from at least one light metal material and / or from at least one steel material and / or from at least one unreinforced or particle-reinforced and / or fiber-reinforced plastic. It is also possible and preferred that the upper component and / or the lower component and / or the reinforcing component is made from a combination of at least two such materials. The light metal material preferably consists of aluminum and / or magnesium and / or their respective alloys. Aluminum or an aluminum alloy is particularly preferably used. Such materials or combinations can be used particularly advantageously for the battery device according to the invention.

[0022] Preferably, the upper component and the lower component are connected by means of at least one adhesive connection and / or by means of at least one welded connection and / or by means of at least one mechanical joining connection. It is also preferred that the reinforcing component and the upper component and / or the lower component are connected by means of at least one adhesive connection and / or by means of at least one welded connection and / or by means of at least one mechanical joining connection. The mechanical joining connection is formed, for example, as a stamped portion. Such types of connection enable a particularly reliable and stable, yet inexpensive assembly. Other suitable types of connection are also possible.

[0023] It is possible and preferred for the reinforcing component to be provided by at least one extruded profile and / or one produced in a continuous manufacturing process. In particular, the reinforcing component comprises at least one such profile. Such a profile has particularly advantageous structural and mechanical properties. It is also possible for the profile to be produced by at least one other suitable method.

[0024] Preferably, the reinforcing component is at least partially manufactured by at least one extrusion process. In particular, the reinforcing component comprises at least one extruded component and preferably an extruded profile, or is provided by at least one such extruded component. Such a reinforcing component consists in particular of a light metal material, for example, aluminum or magnesium or one of their alloys. Such reinforcing components can be used particularly advantageously for the receiving device.

[0025] The reinforcing component is preferably made at least partially from at least one fiber-plastic composite, in particular by means of braiding and / or pultrusion.

[0026] Another suitable manufacturing process for a fiber-plastic composite is also possible. It is also preferred that the reinforcing component is at least partially made of at least one unreinforced or reinforced plastic, in particular by extrusion. Another suitable manufacturing process for an unreinforced or reinforced plastic is also possible. A reinforcing component designed in this way offers particularly good lightweight construction properties.

[0027] The upper substructure comprises, in particular, at least one battery frame structure or is designed as such. The lower substructure comprises, in particular, at least one battery housing base or is designed as such. The upper and / or lower substructure can also provide or include further components.

[0028] It is possible for the upper substructure to comprise at least one cover. The cover is preferably designed as a flat component. It is preferred for the at least one battery module to be attached to the upper substructure and preferably to the battery frame structure. It is also possible for the upper substructure to be provided at least partially by a body structure of a carrier vehicle.

[0029] The battery frame structure can comprise at least one profile and, in particular, at least one hollow profile. The profiles are, in particular, connected in a frame-like manner. The battery frame structure comprises, for example, at least one longitudinal member and / or at least one cross member. The battery frame structure comprises, in particular, at least one cross strut and / or at least one longitudinal strut, which is connected to the longitudinal member or cross member.

[0030] It is possible for the at least one battery module to be at least partially fastened to the lower substructure. Preferably, the at least one battery module is not fastened to the lower substructure and in particular not to the battery housing base. In particular, the lower substructure is suitable and designed to serve as impact protection when driving over objects. In particular, the lower and / or the upper component is designed as a protective plate. However, it is also possible for an additional protective plate to be assigned to the lower substructure. In particular, the at least one reinforcing component enables the lower component to be spaced apart from the upper component at a suitable distance as impact protection.

[0031] In all embodiments, it is particularly preferred that the lower substructure comprises at least two reinforcing components. This enables a particularly robust and stable design of the receiving device. In particular, the reinforcing components are each formed as a hollow profile. It is also possible for a plurality of reinforcing components to be provided. For example, three or four, or even five or eight reinforcing components can be provided. It is also possible for ten or more reinforcing components to be provided. In particular, the number of reinforcing components is adapted to the size of the battery device.

[0032] The motor vehicle according to the invention is equipped with an at least partially electrically operated drive system. To supply energy to the drive system, the motor vehicle comprises at least one battery device as described above.

[0033] The motor vehicle according to the invention has many advantages and can, for example, be manufactured particularly economically and inexpensively. Furthermore, it is particularly easy to maintain and offers an optimized overall weight. The motor vehicle is designed, in particular, as a passenger car.

[0034] The upper component and / or the lower component are in particular designed to be flat. The lower component is in particular designed as a flat component. The upper component is in particular designed as a flat component. The upper component and / or the lower component can also each comprise at least one flat component. For example, a sheet metal component or plate component is provided. The upper component and / or the lower component can be flat or planar. It is also possible for the upper component and / or the lower component to be uneven. The upper component and / or the lower component can, for example, have a wave shape or trapezoidal shape or another geometric shape.

[0035] The hollow profile is designed, in particular, as a closed hollow profile. The hollow profile comprises at least one hollow chamber. The hollow profile can, for example, also have two or three or more hollow chambers. In particular, the hollow profile is closed along its longitudinal edges. It is possible for the hollow profile to have recesses and, for example, bores or the like.

[0036] It is possible for at least one reinforcing element to be arranged between the upper component and the lower component in addition to the at least one reinforcing component. The reinforcing element is, in particular, not designed as a hollow profile. The reinforcing element can be arranged separately from the reinforcing component. The reinforcing element can also be arranged at least partially on the reinforcing component. It is possible for the reinforcing component and the reinforcing element to at least partially complement each other in their functions. It is also possible for the reinforcing element and the reinforcing component to fulfill independent functions.

[0037] The battery device is intended, in particular, for installation in the floor area of ​​a vehicle. The battery device is designed, in particular, as an underbody battery. The battery device can also be provided for a different position.

[0038] Further advantages and features of the present invention will become apparent from the embodiment which will be explained below with reference to the accompanying figures. Fig. 1 is a highly schematic representation of a battery device according to the invention in a motor vehicle; Fig. 2 a highly schematic representation of a battery device in a perspective exploded view; Fig. 3 a highly schematic detailed representation of a battery device in a sectional side view; Fig. 4 a highly schematic detailed representation of another battery device in a sectional side view; Fig. 5 a highly schematic detailed representation of a battery device in a sectional perspective view obliquely from above; and Fig. 6 a highly schematic representation of a battery device in a sectional side view.

[0039] The Fig. 1 shows a motor vehicle 100 configured as an electric vehicle. The vehicle 100 can also be configured as a hybrid vehicle. The motor vehicle 100 is equipped with a battery device 1 according to the invention, which serves as a high-voltage energy storage device 101 for an electric drive 104. The battery device 1 is housed here, for example, in a floor area of ​​the motor vehicle 100. However, the battery device 1 can also be arranged at a different location in the motor vehicle 100.

[0040] In the Fig. Figure 2 shows a battery device 1 according to the invention in a perspective view in an exploded view. The battery device 1 comprises a plurality of battery modules 102, each of which has a plurality of battery cells 103. For better clarity, only one module 102 with one cell 103 is shown here as an example.

[0041] The battery modules 102 are arranged in a receiving device 2, which provides a receiving space 12 for the modules 102. The receiving space 12 is divided, for example, into several sections for each module 102 or for a group of modules 102.

[0042] The receiving device 2 comprises an upper substructure 3 and a lower substructure 4. The upper substructure 3 here has a battery frame structure 13, which laterally delimits and closes the receiving space 12. In one embodiment, the upper substructure 3 can have a cover 23, which delimits and closes the receiving space 12 at the top.

[0043] The battery frame structure 13 comprises, for example, crosspieces and longitudinal members, which are connected to one another in a frame-like manner. The individual battery modules 102 can be accommodated between the crosspieces and longitudinal members. The crosspieces and / or longitudinal members are designed, for example, as profiles, in particular as hollow profiles. The crosspieces and / or longitudinal members can also be provided by other suitable structural components.

[0044] The lower substructure 4 is designed here as a battery housing base 14, which delimits and closes the receiving space 12 at the bottom.

[0045] The lower partial structure 4 here comprises a flat upper component 5 and a flat lower component 6 as well as at least one reinforcing component 7 arranged therebetween and designed as a hollow profile 17. The components 5, 6, 7, 17 are not shown individually here and are described in more detail with reference to the following figures.

[0046] In the Fig. Figure 3 shows a more detailed embodiment of the lower substructure 4. The upper and lower components 5, 6 are each formed by a surface component and, for example, a plate.

[0047] The components 5, 6 can be connected to one another directly or indirectly at their edge regions (not shown here). The connection can be made, for example, by means of at least one adhesive connection and / or by means of at least one welded connection and / or by means of at least one mechanical joining connection. For example, in the Fig. 5 shows a direct connection of the components 5, 6 in their edge areas.

[0048] In addition, the lower substructure 4 here comprises two reinforcing components 7 designed as hollow profiles 17. In other embodiments, more or fewer reinforcing components 7 can be provided. The hollow profiles 17 are closed here and each have three hollow chambers. More or fewer hollow chambers are also possible. Hollow profiles 17 with a different profile structure or with a different profile cross-section can also be provided.

[0049] The reinforcing components 7 are connected here to the upper component 5 and to the lower component 6. A connection 9 between the upper component 5 and the reinforcing element 7 and a connection 9 between the lower component 6 and the reinforcing component 7 are made here, for example, by means of at least one adhesive connection and / or by means of at least one welded connection and / or by means of at least one mechanical joining connection.

[0050] In the Fig. Figure 4 shows a further embodiment of the lower substructure 4. The lower component 6 is designed here as a flat surface component.

[0051] The upper component 5 is designed here as a wave-shaped or trapezoidal surface component. Different wave shapes or trapezoidal structures are provided. This allows for a variable spacing of the upper component 5 from the lower component 6. Depending on the spacing, different components, such as the reinforcement components 7, can be accommodated. However, it is also possible to provide cavities without components between the components 5 and 6.

[0052] The upper component 5 and the lower component 6 are directly connected to one another in sections. For example, an adhesive connection and / or a welded connection and / or a mechanical joining connection are preferred as the connection 9. Additionally or alternatively, the components 5, 6 can also be connected to one another at least in sections in their edge regions. A connection in the edge regions is made, for example, as described with reference to Fig. 3 described.

[0053] The lower substructure here comprises two reinforcing elements 7 designed as hollow profiles 17. A connection 9 between the upper component 5 and the reinforcing component 7 or between the lower component 6 and the reinforcing component 7 is made, for example, as described with reference to Fig. 3 described.

[0054] The Fig. 5 shows a battery device 1 according to the invention, which in its basic structure, for example, corresponds to that shown with reference to Fig. 2. The battery frame structure 13 of the upper substructure 3 is particularly clearly visible here, which here includes, for example, different types of hollow profiles. Furthermore, the connection of the battery modules 102 arranged in the receiving space 12 to the battery frame structure 13 is particularly clearly visible. The modules 102 are not mounted on the battery housing base 14 here, so that the latter does not have to bear the weight of the modules 102.

[0055] The lower substructure 4 is designed here, for example, as described above. The at least one reinforcing component 7, designed as a hollow profile 17, is arranged concealed in the illustration shown here.

[0056] The lower substructure 4 is connected to the upper substructure 3 by means of connections 9, which are indicated schematically here by arrows. Preferably, the connection is also made via additional connections 9 not shown here.

[0057] The lower substructure 4 is connected to the upper substructure 3 in such a way that non-destructive disassembly is possible. For this purpose, the connections 9 between the upper and lower substructures 3, 4 are designed, for example, as a screw connection and / or adhesive connection or comprise at least one of these. The adhesive connection can be removed, in particular, without destroying the substructures 3, 4.

[0058] The battery device 1 can be equipped with at least one sealing device 8 for the watertight sealing of the lower substructure 4 to the upper substructure 3. The sealing device 8 comprises, for example, a thick-film adhesive 18, which is applied in particular in the form of one or more adhesive beads. In addition to the sealing effect, the sealing device 8 preferably also creates a removable adhesive connection between the substructures 3, 4.

[0059] The Fig. Figure 6 shows an embodiment of the battery device 1, in which the upper substructure 3 is formed as a component of the body of a motor vehicle 100. The lower substructure 4 is designed, for example, as described above. The at least one reinforcing component 7 is not visible in the sectional plane shown here.

[0060] In the embodiments described here, the upper component 5 and / or the lower component 6 and / or the reinforcing component 7 are made, for example, from a light metal material and / or a steel material and / or from at least one unreinforced or particle-reinforced and / or fiber-reinforced plastic, or a combination of at least two such materials. The light metal material is preferably aluminum and / or magnesium and / or one of their respective alloys.

[0061] The reinforcing components 7 shown here are, for example, extruded profiles and / or profiles manufactured in a continuous production process. The reinforcing components 7 can also be extruded profiles. The reinforcing components presented here can also be manufactured at least partially from a fiber-plastic composite by braiding and / or pultrusion. The reinforcing components 7 can also be manufactured at least partially from at least one unreinforced or reinforced plastic by extrusion. Other materials or other manufacturing processes are also possible.

[0062] The invention presented here offers a particularly advantageous multi-part assembly of a receiving device 2 of a battery device 1. Thus, by means of local connection and, for example, stamping or targeted spacing of the surface components 5, 6 and their structural-mechanical coupling with the reinforcement components 7, the deformation behavior in crash or special load cases can be specifically influenced. This enables a design that meets requirements and is lightweight. Furthermore, a removable connection of the battery housing base 14 to the battery frame structure 13 is provided, which can significantly improve dimensional accuracy.

[0063] The invention presented here offers significantly improved impact protection when driving over objects due to the spacing between the battery modules 102 and the battery housing base 14 or the lower component 6. Furthermore, significant cost savings are achieved by eliminating expensive sealing welds. Furthermore, a significant improvement in flatness and tolerances is achieved by reducing heat input and eliminating problematic welds.

[0064] The invention also offers a significant improvement in repairability. This allows for a simple replacement of the battery housing base 14 or particularly easy access to the battery control / battery cooling / power electronics without disassembling the entire mounting device 2 or the battery box.

[0065] The invention also offers a significant weight reduction, since the battery housing base 14 or the lower or upper component 5, 6 no longer have to bear the weight of the battery modules 102.

[0066] Furthermore, the invention offers significantly simplified production of the battery device 1. This significantly simplifies access to the battery modules 102 during assembly. Likewise, access to cooling and cabling / busbars and other battery components is particularly easy from both sides or from above and below. Production is further simplified by the fact that no separate protective plate is required in addition to the battery housing base 14. This can save numerous screws, for example. Furthermore, handling during production is improved. List of reference symbols: 1 battery device 2 Recording device 3 Substructure 4 Substructure 5 Component 6 Component 7 Reinforcing component 8 Sealing device 9 Connection 12 Recording room 13 Battery frame structure 14 Battery housing base 17 hollow profile 18 Thick-film adhesive 23 lids 100 motor vehicles 101 high-voltage energy storage 102 Battery module 103 battery cells 104 Drive

Claims

[1] Battery device (1), in particular high-voltage energy storage device (101), for an at least partially electrically operated motor vehicle (100), comprising at least one receiving device (2) for providing at least one receiving space (12) for at least one battery module (102) with at least one battery cell (103), wherein the receiving device (2) comprises at least one upper partial structure (3) which at least partially delimits the receiving space (12) at least upwards and / or laterally, and wherein the receiving device (2) comprises at least one lower partial structure (4) which at least partially delimits the receiving space (12) at least downwards, wherein the lower partial structure (4) comprises at least one flat upper component (5) and at least one flat lower component (6) and at least one reinforcing component (7) arranged between the upper component (5) and the lower component (6) and designed as a hollow profile (17), characterized by , that the upper substructure (3) provides at least one battery frame structure (13) and that the at least one battery module (102) is attached to the battery frame structure (13) and that the lower substructure (4) provides at least one battery housing base (14) and that the at least one battery module (102) is not attached to the battery housing base (14). [2] Battery device (1) according to the preceding claim, wherein the upper component (5) and the lower component (6) are directly connected to one another at least in sections at least in their edge regions. [3] Battery device (1) according to one of the preceding claims, wherein the reinforcing component (7) is at least partially connected to the upper component (5) and / or to the lower component (6). [4] Battery device (1) according to one of the preceding claims, wherein the lower partial structure (4) is detachably connected to the upper partial structure (3). [5] Battery device (1) according to one of the preceding claims, wherein the lower partial structure (4) is connected to the upper partial structure (3) by means of at least one screw connection and / or at least one adhesive connection. [6] Battery device (1) according to one of the preceding claims, comprising at least one sealing device (8) for sealing, in particular in a watertight manner, the lower partial structure (4) to the upper partial structure (3). [7] Battery device (1) according to one of the preceding claims, wherein the lower partial structure (4) is connected to the upper partial structure (3) at least by means of at least one thick-film adhesive (18), in particular in the form of at least one adhesive bead. [8] Battery device (1) according to one of the preceding claims, wherein the upper component (5) and / or the lower component (6) and / or the reinforcing component (7) is made at least partially from at least one light metal material and / or from at least one steel material and / or from at least one unreinforced or particle-reinforced and / or fiber-reinforced plastic or a combination of at least two such materials, and wherein the light metal material preferably consists of aluminum and / or magnesium and / or their respective alloys. [9] Battery device (1) according to one of the preceding claims, wherein the upper component (5) and the lower component (6) and / or wherein the reinforcing component (7) and the upper component (5) and / or the lower component (6) are connected by means of at least one adhesive connection and / or by means of at least one welded connection and / or by means of at least one mechanical joining connection. [10] Battery device (1) according to one of the preceding claims, wherein the reinforcing component (7) is provided by at least one extruded profile and / or one produced in a continuous manufacturing process. [11] Battery device (1) according to one of the preceding claims, wherein the reinforcing component (7) is at least partially produced by means of at least one extrusion process. [12] Battery device (1) according to one of the preceding claims, wherein the reinforcing component (7) is at least partially made of at least one fiber-plastic composite by means of braiding and / or pultrusion and / or wherein the reinforcing component is at least partially made of at least one unreinforced or reinforced plastic by means of extrusion. [13] Battery device (1) according to one of the preceding claims, wherein the lower partial structure (4) comprises at least two reinforcing components (7). [14] Motor vehicle (100) with an at least partially electrically operated drive (104), comprising a battery device (1) according to one of the preceding claims for supplying energy to the drive (104).

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