Battery box with frame reinforcement elements

Abstract

The invention relates to a battery box for receiving at least one battery for an electric vehicle, the battery box having a frame surrounding the outside and having a bottom. A frame reinforcement element for reinforcing the surrounding of the frame is arranged below the frame, wherein the material thickness of the frame reinforcement element corresponds to its cross-sectional height.

Description

Technical Field

[0001] The invention relates to a battery box for an electric vehicle having a frame reinforcement element according to the preamble of claim 1 . Background Art

[0002] Known electric vehicles have units that serve as electrical storage devices, hereinafter referred to as batteries. In modular construction, these units are usually divided into individual independent cells, hereinafter referred to as battery cells. For example, such battery cells can be composed of rechargeable secondary cells, which are usually referred to as accumulators.

[0003] For mass production, a battery box is provided in which the individual battery cells are received. Each individual battery cell is mechanically connected to the battery box in order to prevent slipping during operation. The battery box is particularly designed for installation in a motor vehicle or attachment to a motor vehicle, such as a passenger vehicle or a truck, in particular for installation or attachment in the floor area. On the one hand, the battery box serves as a modular construction group, which simplifies the mass production of the vehicle. On the other hand, the battery box protects the battery cells from environmental influences and from damage caused by mechanical effects, such as damage that may occur in an accident.

[0004] For example, the battery cells in the battery box can be screwed to the battery box. For this purpose, a connecting element, particularly referred to as a screw node, screw point, screw head or screw block, can be connected to the base of the battery box. The individual battery cells are then screwed to the connecting element.

[0005] The bottom plate of the battery box also serves to seal the battery box at the bottom side of the battery box. The bottom plate is usually designed to be closed, and the above-mentioned connecting elements are engaged on the inner side of the bottom plate.

[0006] Such a battery box for a vehicle battery is known from DE 10 2016 115 037 A1. There are many requirements for battery boxes of this type. Therefore, they must primarily bear the weight of the battery elements, namely the battery cells which are usually assembled in modules. For this purpose, a type of side wall or frame is usually provided, which is used to attach the various components of the battery housing itself and also to attach the battery box directly or indirectly to the body of the motor vehicle.

[0007] Battery elements of this type should be protected from damage in the event of an accident or other vehicle damage. In this case, the battery box serves in particular as a barrier to collision loads acting from the side and below. In this case, the frame can transfer the collision loads to the carrier structure located in or below the battery space. However, in the event of a side impact, the frame should intrude as little as possible into the interior of the battery box so that the battery elements are not damaged.

[0008] A battery box with side reinforcements is known from DE 10 2016 115 037 A1. The side wall structure has an attachment area that is located further inward than the outer side wall and is used to connect the side wall structure to the cover.

[0009] Overall, the battery compartment or its frame should require as little installation space as possible, and as few internal support structures as possible should be arranged inside the housing, which results in a conflict of objectives with crash requirements. Summary of the invention

[0010] Against this background, the object of the present invention is to provide a battery compartment for an electric vehicle which has a simple structural design and at the same time has an improved energy absorption capacity in the event of a collision.

[0011] This object is achieved by a battery box for an electric vehicle having a frame reinforcement element according to claim 1. Advantageous developments of the invention are revealed in the dependent claims.

[0012] The invention relates to a battery box for receiving at least one battery for an electric vehicle, the battery box having a frame surrounding the outside and having a bottom.

[0013] According to the invention, a frame reinforcement element for reinforcing the frame is arranged below the frame, wherein the material thickness of the frame reinforcement element corresponds to its cross-sectional height. In other words, the frame reinforcement element at least partially has a solid cross section.

[0014] The frame reinforcement ensures the distribution of the impact loads in order to avoid bulging, in particular of one or more sheet metal parts of the housing bottom.

[0015] The frame and the frame reinforcement elements are located in the so-called deformation zone and absorb the forces caused by the crash. These forces are distributed within the frame without transmitting the crash-induced forces to the battery or storage battery surrounded by the frame. The battery is thus arranged in the vehicle in a manner that is as crash-proof as possible and can be accommodated in existing vehicle programs or in existing vehicles.

[0016] According to a first advantageous embodiment of the invention, the floor is formed by a plurality of floor layers which are arranged at a distance from one another, wherein the frame reinforcement element is arranged in a floor cavity formed by the floor layers.

[0017] This is a so-called hybrid battery box or high-voltage storage (HVS), in which the bottom of the battery box can be formed by a cover plate or a bottom plate (bottom layer). That is, the bottom can be constructed from a plurality of layers as a "sandwich structure". The battery bottom is placed flat on the inner bottom layer of the bottom, that is, the bottom layer is the upper layer in the installed position, which is also called the middle bottom. The battery is arranged on the upper bottom layer, the middle bottom. The outer or lower bottom layer (the so-called underbody protection, Unterfahrschutz) is arranged at a distance below the middle bottom.

[0018] The frame of the battery box can have at least two structural components joined to one another at the ends, which structural components can have a substantially rectangular cross section. The profile section can be connected to the motor vehicle body via fastening means.

[0019] According to a further advantageous variant of the invention, the material thickness of the frame reinforcement element corresponds to its cross-sectional height, wherein this material thickness at least partially has the spacing of the base layer.

[0020] In other words, the frame reinforcement element has at least partially a solid cross section over the entire spacing of the base layer.

[0021] In particular, it can be provided that the cross-sectional width of the solid cross section of the frame reinforcement element is greater than the cross-sectional height of the frame reinforcement element.

[0022] A “solid cross section” is to be understood as a continuous, ie solid, region of the profile component, ie solid material. Due to this configuration, horizontal impact loads are introduced directly into the multi-part housing bottom.

[0023] The lower floor layer forms the underbody protection, the upper floor layer forms the intermediate floor. The lower floor layer and the upper floor layer together form the cover layer of the partially hollow floor structure. The frame reinforcement keeps the floor layers spaced apart. The highest possible reaction force required in the event of a lateral impact is preferably generated by the surrounding frame reinforcement, which is located as far as possible on the outside of the floor structure.

[0024] Another advantageous variant of the invention provides that the frame adjoins at least one base layer and / or that the frame and at least one base layer form a closed profile, so that the impact loads can be better absorbed by the battery compartment.

[0025] According to another advantageous embodiment of the invention, the frame reinforcement element is at least partially configured as a hollow profile, preferably an extruded profile. This ensures that the bottom structure remains essentially flat and does not bulge or bend when a collision load is introduced. In addition, the longitudinally and / or possibly transversely extending temperature control channel can preferably be arranged on the side facing the interior of the battery housing, and the temperature control channel thus provides a cavity for guiding the temperature control agent. In addition to the task of the highest possible collision performance, the component can also be used as a distributor for a cooling or heating system in the battery housing.

[0026] It can be provided that the frame reinforcement element at least partially completely fills the floor cavity between the floor layers in order to be able to better absorb the forces resulting from an impact.

[0027] In an advantageous development of the invention, the frame is produced by extrusion, roll forming or trimming.

[0028] According to another advantageous embodiment of the invention, the frame covers the end side of the bottom. In this way, a good sealing of the frame is ensured, in particular for improved corrosion protection. In addition, the frame provides an attachment to the housing cover. A good introduction of impact loads is still ensured.

[0029] The frame surrounding the outside can be composed of a hollow profile, in particular a multi-chamber hollow profile. Preferably, at least one transverse carrier and at least one longitudinal carrier are arranged in the frame. A receiving space for receiving at least one battery is constructed by at least one transverse carrier and at least one longitudinal carrier. Here, at least one battery is especially placed in the receiving space so that the battery is coupled in the receiving space in a planar manner and preferably under the effect of prestress against the tabs, in particular the coupling is achieved by screws. The heat generated in each battery can be transferred to the bottom of the battery box via the bottom of the battery by means of heat conduction. Thus, heat conduction is achieved from the bottom of the battery to the bottom of the battery box. It is also conceivable to supply heat to the battery in order to provide a certain operating temperature.

[0030] In addition, the frame is used for storage-safe reception and transport-safe holding of batteries arranged in the vehicle. The frame can completely or at least partially surround the battery and can have a first fastening means for fastening the battery to the frame and a second fastening means for fastening the frame to a vehicle component.

[0031] The hollow profile section of the frame has at least one deformation zone in order to at least partially absorb the loads caused by a collision. Such a frame includes a battery arranged in the vehicle and thus protects the battery as much as possible from damage caused by a collision. This is achieved in that the frame, in particular the deformation zone, can absorb the forces caused by the collision and distribute them within the frame in order to keep the forces caused by the collision acting on the battery surrounded by the frame as low as possible. The battery is thus arranged in the vehicle in a manner that is as crash-proof as possible and can be accommodated in existing vehicle programs or in existing vehicles and can be used as a safe mount for the battery.

[0032] It is known from the prior art that the force transmission path is mainly guided through the module space of the battery housing. For this reason, the inner side of the frame structure may bulge or tilt into the structural space of the battery module. Based on the present invention, the damage to the battery module that is inevitably associated with this is avoided to a large extent. The hollow profile section of the frame has at least one deformation zone to at least partially absorb the load caused by the collision. This type of frame includes a battery arranged in the vehicle and therefore protects the battery from damage caused by the collision to the greatest extent.

[0033] According to an extension of the invention, the frame of the battery box and at least one bottom layer are joined to each other in a material-locking and / or form-locking manner (in particular welded). Welding can be laser welding with a continuous seam or with a double-line interlocking seam (Steppnaht) and a seam seal, in order to thereby provide a sealed interior space. At least one bottom layer, in particular the middle bottom, is welded and, if necessary, adhesively bonded. The bottom layer, referred to as the underbody protection, can also be welded and / or adhesively bonded. It is also conceivable to couple the underbody protection to the frame in a force-locking manner, for example by means of screwing.

[0034] According to another advantageous embodiment of the invention, at least one transverse profile member and / or at least one longitudinal profile member is arranged in the bottom cavity between the bottom layers or on one bottom layer for reinforcing the frame reinforcement element. The at least one transverse profile member and / or at least one longitudinal profile member supports the solid cross-section frame inwardly.

[0035] According to one embodiment of the invention, the frame reinforcement element has at least one through hole and / or at least one unilateral or bilateral deepening which slightly reduce the crash performance but have a disproportionately positive effect on the low overall weight.

[0036] Advantageously, at least one bottom layer can be made of a metallic material, preferably both bottom layers are made of a metallic material, in particular steel or a steel alloy. Preferably, the bottom layer can be made of sheet steel, thereby further improving the crash performance or intrusion resistance of the battery box.

[0037] The at least one base layer can have a thickness of a maximum of approximately 0.8 mm to 2 mm, preferably 1.5 mm.

[0038] It is conceivable that the frame reinforcement element and the at least one base layer are coupled to each other in a material-locking and / or form-locking manner (in particular welded and / or adhesively bonded). In this case, in particular shielding gas welding, laser welding or resistance welding come into consideration.

[0039] Furthermore, the base layers can be coupled to one another in a materially and / or form-locking manner (in particular welded, preferably spot welded or laser welded). In this way, a simple manufacturing method and a firm connection of the base layers are ensured. This leads to an increase in shear strength and thus to an increase in crash safety. For spot welding, so-called punchings can be introduced into the base layers. This allows the spaced-apart bottom layers to touch at a few locations and to join there.

[0040] According to another advantageous embodiment of the invention, a temperature control device is arranged in the bottom cavity, in particular a cooling device for dissipating heat from at least one battery or a heating device for supplying heat to the battery. The temperature control device is located on the outer or lower bottom layer, so that the temperature control device is thus arranged between the bottom layers. This allows particularly good heat conduction from the battery bottom via the inner bottom layer to the temperature control device.

[0041] In another variant of the present invention, the lower bottom layer protrudes outward relative to the upper bottom layer pointing to the battery. In this way, the possibility of simply attaching the frame of the battery box to the bottom is provided. Then the fastening means for attaching to the frame can be installed in the outward protruding section of the bottom, in particular, in one or more bottom layers. Alternatively or additionally, it is conceivable that the frame is welded to the outward protruding section of the bottom, so that there is a reliable connection between the frame and the bottom to form the battery box, and the support of the bottom on the frame is improved again. The bottom layer pointing to the battery should be understood as the middle bottom, that is, the battery is flat on the bottom layer. The temperature control device is located below the upper bottom layer, and the lower bottom layer (i.e., the underbody protection part) is located below the temperature control device. The frame of the battery box can be arranged between the outward protruding sections of the bottom layer and coupled to the sections (especially welded). This further improves the support of the bottom on the frame.

[0042] The frame reinforcement element can have a material thickness of at least 3 mm, preferably 6 mm.

[0043] Furthermore, it is conceivable that the frame has at least one inner reinforcement profile which is arranged within the frame or within the frame profile. If the frame is open on one side or is assembled from a plurality of parts, additional inner reinforcements can also be introduced into the frame. This can further improve the crash performance or, alternatively, reduce the weight compared to unreinforced variants with the same crash performance.

[0044] Further objects, advantages, features and application possibilities of the present invention are apparent from the following description of exemplary embodiments with reference to the accompanying drawings. All features described and / or illustrated in the drawings constitute the subject matter of the present invention individually or in any meaningful combination, regardless of their summary in the claims or their reference relationships. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Here, the attached drawings partially schematically show:

[0046] Figure 1 A battery box having a surrounding frame and frame reinforcement elements,

[0047] Figures 2 to 11 Detailed views of the bottom of a battery box with a frame and frame reinforcement elements in different configurations.

[0048] In the figures shown below, identical or identically acting components are provided with reference numerals depending on the embodiment in order to improve readability. DETAILED DESCRIPTION

[0049] exist Figure 1 1 shows a battery box 1 for receiving at least one battery 2 of an electric vehicle. The battery box 1 can have Figure 1 The cover 9 is shown.

[0050] In accordance with Figure 2-10 In the embodiment of FIG. 1 , the bottom 4 of the battery box 1 is designed as a double layer and has a cover plate or a bottom plate (the so-called bottom layer 6 , 7 ). Fig.11 An embodiment is shown having a single-layer bottom 4 .

[0051] As Figures 1 to 11 As is further known, the battery box 1 has a frame 3 which surrounds the outside. The frame 3 of the battery box 1 can have at least two structural components 16, 17 which are joined to each other at the ends and have a substantially rectangular cross section. In the present case, the frame 3 is formed by a hollow profile, in particular a multi-chamber hollow profile. Figures 2 to 11 The detailed view of shows a frame 3 with at least one transverse support 16 and at least one longitudinal support 17. The frame 3 can be connected to the motor vehicle body via fastening means.

[0052] A receiving space for receiving at least one battery 2 is formed by at least one transverse carrier 16 and / or at least one longitudinal carrier 17. Figure 1 As shown. At least one battery 2 is installed in particular in the receiving space so that it is coupled in the receiving space in a planar manner and preferably under prestress against the carriers 16, 17. The coupling is preferably achieved by screws. In this way, the heat generated in each battery 2 can be transferred to the bottom 4 of the battery box 1 via the bottom of the battery by means of heat conduction. However, it is also conceivable that the battery box 1 does not have a transverse carrier 16 and / or a longitudinal carrier 17, especially in the case of relatively small battery boxes.

[0053] As Figures 1 to 11 As is further known, a circumferential frame reinforcement element 5 for reinforcing the frame 3 is arranged below the frame 3. Here, the material thickness of the frame reinforcement element 5 corresponds to its cross-sectional height h. In other words, the frame reinforcement element 5 has a solid cross section 11 at least partially.

[0054] As mentioned above, according to Fig.11 The embodiment of FIG. 4 shows a bottom 4 of a battery box 1 which is designed as a single layer, ie has only a lower bottom layer 6 (the so-called underbody protection). Figures 1 to 10 The embodiment shown has a double-layer bottom 4 .

[0055] In the embodiment with a double-layered bottom 4, the material thickness of the frame reinforcement element 5 corresponds to its cross-sectional height h and at least partially has the spacing d of the bottom layers 6, 7. In other words, the frame reinforcement element 50 has a solid cross section 11 at least partially over the entire spacing d of the bottom layers 6, 7. In particular, it can be provided that the cross-sectional width b of the solid cross section 11 of the frame reinforcement element 5 is greater than the cross-sectional height h of the frame reinforcement element.

[0056] The solid cross section 11 is understood to be a continuous, i.e. solid, region of the profile component 5, i.e. solid material. Due to this configuration, horizontal impact loads are introduced directly into the multi-part housing bottom 4. The frame reinforcement 5 ensures the distribution of the impact loads in order to prevent the bottom layers 6, 7 of the housing bottom 4 from bulging.

[0057] As Figures 1 to 10 As is also known, the frame reinforcement 5 holds the floor layers 6 , 7 at a distance d. The highest possible counterforce required in the event of a lateral impact is preferably generated by the surrounding frame reinforcement 5 located as far as possible on the outside of the floor structure.

[0058] In addition, by Figure 1 , Figure 5 , Figure 6 , Figure 7 , Fig.10 and Fig.11 It is known that the frame 3 is connected to at least one bottom layer 6, 7. Figures 2 to 9 as well as Fig.11 , the frame 3 with the at least one bottom layer 6 , 7 forms a closed profile.

[0059] according to Figures 3 to 9 as well as Fig.11 The embodiment of FIG. 4 shows that the frame 3 covers the end side 18 of the bottom 4 . In this way, a good seal of the bottom 4 is ensured, in particular for improved corrosion protection. Furthermore, the frame 3 provides an attachment to the housing cover 9 .

[0060] Depend on Fig.10 An embodiment of a battery box 1 with a temperature control device 10 is known. In this case, the battery bottom rests on an inner bottom layer 7, i.e., the bottom layer 7 is the upper layer of the bottom 4 in the installed state. The bottom layer 7 is also referred to as an intermediate layer. A temperature control device 10 can be arranged below the bottom layer, which is located on the outer or lower bottom layer 6 (the so-called underbody protection), so that the temperature control device 10 is therefore arranged between the bottom layers 6, 7. In this way, a particularly good heat conduction from the battery bottom via the inner bottom layer 7 to the temperature control device 10 can be achieved. In this way, the battery 2 can be cooled or the battery 2 can be kept at a certain operating temperature by supplying heat to the battery 2.

[0061] In the present exemplary embodiment, the two bottom layers 6, 7 are made of steel or a steel alloy, thereby further increasing the crash resistance or intrusion resistance of the battery box 1. In particular, the bottom layers 6, 7 can be made of steel sheets and welded to one another (preferably spot welded or laser welded). For spot welding, so-called punchings can be introduced into the bottom layers 6, 7. 14, so that the spaced-apart bottom layers 6, 7 can touch at a few locations and can be joined there. At least one bottom layer 6, 7 can have a thickness of a maximum of approximately 0.8 mm to 2 mm, preferably 1.5 mm.

[0062] In order to better attach the frame 3 to the base 4, one base layer 6, 7 can protrude outwards relative to the other base layer 7, 6, so that the frame can be joined in a simple manner with the protruding sections of the base layers 6, 7. In particular, it is conceivable that the lower base layer 6 protrudes outwards relative to the upper base layer 7 pointing toward the battery 2, as in accordance with Figure 3 , Figure 4 , Figure 6 , Figure 7 and Fig. 9As shown in the embodiment of . Then the fastening means for attaching to the frame 3 of the battery box 1 can be installed in the outwardly protruding section of the bottom 4, in particular in one or more bottom layers 6, 7. Alternatively or additionally, it is conceivable that the frame 3 is welded to the outwardly protruding section of the bottom 4.

[0063] The frame 3 and at least one bottom layer 6, 7 of the battery box 1 are joined to each other in a material-locking and / or form-locking manner, in particular welded. Welding can refer to laser welding with a continuous seam or a double-thread interlocking seam with a seam seal, so as to provide a sealed interior space. At least one bottom layer 6, 7, in particular the middle bottom 7, is welded or adhesively bonded. The bottom layer 6, which is called the underbody protection part, can also be welded and / or adhesively bonded. It is also conceivable to couple the underbody protection part 6 to the frame 3 in a force-locking manner, for example by means of screwing.

[0064] according to Figure 1 In the bottom cavity 8 between the bottom layers 6, 7 or on at least one bottom layer 6, 7, at least one transverse profile member and / or at least one longitudinal profile member is arranged to reinforce the frame reinforcement element 5. The at least one transverse profile member and / or at least one longitudinal profile member supports the frame reinforcement element 5, i.e. the solid cross-section frame, inwardly.

[0065] according to Figure 2 b. Figure 3 b. Figure 4 b. Figure 5 b and Figure 6 b. Implementation and basis Figure 2 a. Figure 3 a. Figure 4 a. Figure 5 a and Figure 6 The embodiment of a differs in that at least one cavity 15 oriented in the longitudinal direction of the profile is provided for conducting a fluid heat carrier.

[0066] according to Figures 1 to 11 The corresponding embodiments differ in the design of the base 4 , in particular in the design of the frame 3 of the battery box 1 and of the base layers 6 , 7 .

[0067] according to Fig.10 , the temperature control device 10 is arranged further inwards in the frame 3 relative to the frame reinforcement element 5. In this way, the crash-relevant performance and liquid lines are arranged in the battery box 1 in a manner separated from one another, i.e. the frame reinforcement 5 is located in the outer region of the frame 3, while the cooling lines, which are preferably designed as rectangular profiles, are arranged further inwards.

[0068] The frame reinforcement element 5 and the at least one base layer 6 , 7 can be coupled to each other in a materially and / or form-fitting manner (in particular welded and / or adhesively bonded). In particular, shielding gas welding, laser welding or resistance welding are conceivable.

[0069] Furthermore, it is conceivable that the frame 3 has at least one inner reinforcement profile, which is arranged inside the frame 3. This profile can be introduced into a frame 3 which is open on one side or is joined from a plurality of parts, so that the crash behavior is thereby further improved or, alternatively, the weight is reduced compared to a non-reinforced variant with the same crash behavior.

[0070] According to a non-illustrated embodiment of the battery box 1 , it is conceivable to provide at least one through-hole and / or at least one unilateral or bilateral deepening in the Z direction of the frame reinforcement element 5 , which has a disproportionately positive effect on the low overall weight.

[0071] According to an embodiment not shown, at least one battery 2 can be in planar contact with prestress on the base 4 , in particular on the upper base layer 7 .

[0072] Furthermore, it can be provided that different sheet metal thicknesses are used for the bottom layers 6 , 7 so that, for example, the heat transfer to the temperature control region, ie to the battery 2 , can be improved by reducing the thickness of the upper sheet metal.

[0073] Reference numerals list

[0074] 1 Battery box

[0075] 2 Batteries

[0076] 3 Framework

[0077] 4 Bottom

[0078] 5 Frame reinforcement elements

[0079] 6 Bottom layer

[0080] 7 Bottom layer

[0081] 8 Bottom cavity

[0082] 9 Cover

[0083] 10 Temperature control device

[0084] 11 Solid cross section

[0085] 14 Stamping Department

[0086] 15 Cavity

[0087] 16 Horizontal carrier of the frame

[0088] 17 Vertical carrier of the frame

[0089] 18 Bottom side

[0090] d Spacing

[0091] b Cross-sectional width

[0092] h Cross-sectional height

Claims

1. A battery box (1) for receiving at least one battery (2) for an electric vehicle, the battery box having a frame (3) surrounding the outside and having a bottom (4), wherein: A surrounding frame reinforcement element (5) for reinforcing the frame (3) is arranged below the frame (3), characterized in that the material thickness of the frame reinforcement element (5) corresponds to the cross-sectional height (h) of the frame reinforcement element, that is, the frame reinforcement element (5) at least partially has a solid cross-section, wherein the bottom (4) is configured by a plurality of bottom layers (6, 7) arranged at intervals from each other, wherein the frame reinforcement element (5) is arranged in a bottom cavity (8) formed by the bottom layers (6, 7), and at least one transverse profile member and / or at least one longitudinal profile member is arranged in the bottom cavity (8) between the bottom layers (6, 7) or on the bottom layers (6, 7) to reinforce the frame reinforcement element (5).

2. The battery box (1) according to claim 1, characterized in that: The material thickness of the frame reinforcement element (5) at least partially has the spacing of the base layers (6, 7).

3. The battery box (1) according to claim 1 or 2, characterized in that: The frame reinforcement element (5) is arranged in a plane below the plane of the bottom of the battery (2).

4. The battery box (1) according to claim 1 or 2, characterized in that: The frame (3) adjoins at least one bottom layer (6, 7).

5. The battery box (1) according to claim 1 or 2, characterized in that: The frame (3) forms a closed profile with at least one bottom layer (6, 7).

6. The battery box (1) according to claim 1 or 2, characterized in that: The frame reinforcement element (5) is at least partially designed as a hollow profile.

7. The battery box (1) according to claim 1 or 2, characterized in that: The frame reinforcement element (5) at least partially completely fills the bottom cavity (8) between the bottom layers (6, 7).

8. The battery box (1) according to claim 1 or 2, characterized in that: The frame (3) is made by extrusion, roll forming or trimming.

9. The battery box (1) according to claim 1 or 2, characterized in that: The frame (3) covers the end side (18) of the base (4).

10. The battery box (1) according to claim 1 or 2, characterized in that: The frame (3) of the battery box (1) is constructed from a hollow profile.

11. The battery box (1) according to claim 10, characterized in that: At least one transverse support (16) and at least one longitudinal support (17) are arranged in the frame (3).

12. The battery box (1) according to claim 1 or 2, characterized in that: The frame reinforcement element (5) has at least one through-hole and / or at least one unilateral or bilateral deepening.

13. The battery box (1) according to claim 1 or 2, characterized in that: At least one bottom layer (6, 7) is formed from a metallic material.

14. The battery box (1) according to claim 1 or 2, characterized in that: At least one bottom layer (6, 7) has a thickness of 0.8 mm to 2 mm.

15. The battery box (1) according to claim 1 or 2, characterized in that: The frame reinforcement element (5) and at least one base layer (6, 7) are coupled to one another in a materially and / or form-fitting manner.

16. The battery box (1) according to claim 1 or 2, characterized in that: The frame (3) and at least one base layer (6, 7) of the battery box (1) are joined to one another in a materially and / or form-fitting manner.

17. The battery box (1) according to claim 1 or 2, characterized in that: The base layers (6, 7) are coupled to one another in a materially and / or form-fitting manner.

18. The battery box (1) according to claim 1 or 2, characterized in that: A cooling device for dissipating heat from the at least one battery (2) or a heating device for supplying heat to the battery (2) is arranged in the bottom cavity (8).

19. The battery box (1) according to claim 1 or 2, characterized in that: The lower base layer (6) protrudes outward relative to the upper base layer (7) pointing toward the battery (2).

20. The battery box (1) according to claim 1 or 2, characterized in that: The frame reinforcement element (5) has a material thickness of at least 3 mm.

21. The battery box (1) according to claim 20, characterized in that: The frame reinforcement element (5) has a material thickness of 6 mm.

22. The battery box (1) according to claim 1 or 2, characterized in that: The frame (3) has at least one inner reinforcement profile, which is arranged inside the frame (3).

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