WO2020182594A1

WO2020182594A1 - Battery housing

Info

Publication number: WO2020182594A1
Application number: PCT/EP2020/055804
Authority: WO
Inventors: Daniel Nierhoff; Thomas Steier
Original assignee: Thyssenkrupp Steel Europe Ag
Priority date: 2019-03-13
Filing date: 2020-03-05
Publication date: 2020-09-17
Also published as: CN113597705A; DE102019203400A1; CN113597705B

Abstract

The invention relates to a battery housing (1) which can be fitted to a vehicle floor, comprising a tray (2) which has a tray base (2.1) and an encircling tray wall (2.2) which is integrally connected to said tray base and in which one or more battery modules can be arranged, and comprising a cover (3) for closing the tray (2), wherein at least one reinforcement (4) in the form of a profile (4.1, 4.2, 4.3) with a longitudinal extent (L) and a transverse extent (Q) is arranged within the tray (2), at least in sections along the encircling tray wall (2.2), wherein the longitudinal extent (L) of the profile (4.1, 4.2, 4.3) runs parallel to the tray wall (2.2).

Description

Battery case

The invention relates to a battery housing, which can be mounted on a vehicle floor, comprising a trough which has a trough bottom and a circumferential tub wall connected in one piece to it, in which one or more battery modules can be arranged, and a cover for closing the tub.

The ongoing electrification of the automobile and the customer's desire for such vehicles to have a long range require the development of high-performance battery concepts. Housing for such batteries / battery modules accordingly often extend over the entire underbody of a vehicle. There are complex requirements in terms of installation space, weight, crash performance, tightness, corrosion, fire protection, electromagnetic shielding, etc.

Due to the low costs, good separability, high crash performance and good electromagnetic shielding, the installation space around the battery modules is often sealed by a thin-walled, metallic housing. Two basic designs are known from the prior art: the first group forms battery housings built from sheet metal, cast and / or profile components, see FIG. for example DE 10 2016 1 10 330 A1. They have a good ratio of crash performance and space requirements in relation to the sealed interior that can effectively be used for battery modules. A major challenge is the sealing of the battery compartment, especially at the corners, because there usually several components have to be joined together without the tightness being impaired. The second group are battery housings in which the sealed battery compartment by a z. B. deep-drawn nes, folded or folded, in all cases, however, basically tub-like construction part is formed in conjunction with a lid attached to the open side of the tub. This results in an easy-to-seal construction in a shell construction (tub construction), s. for example DE 10 2016 1 16 729 A1.

In order to achieve the required crash performance in a tub design as well, the tub is usually fitted with a surrounding crash frame outside in the wet area. men enclosed or the tub hung in such a crash frame, s. for example DE 10 2016 121 247 A1.

A compartment structure inside the tub often provides additional rigidity, see fig. for example DE 10 2016 209 853 A1. One limitation is often the poor utilization of the space available for the largely cuboid battery modules, particularly in the mostly rounded corners of a tub-like component. A solution for this is given by way of example in WO 2018/210420 A1.

The separation into a dry and wet area inside and outside the tub also largely determines the choice of material. Analyzes have shown that the use of hot-formed steels would be advisable, especially for the crash frame, for reasons of higher strength and the only small permissible deformation spaces. However, due to the lack of cathodic corrosion protection in wet areas, their use is not possible, so that galvanized cold-formed steels with lower strength and the associated additional weight have to be used.

For the reasons mentioned, there is a need for a design variant of a battery housing which combines the advantages of both designs, which is a constructive solution for a battery housing in a tub design with process-safe tightness, good use of the installation space right into the corners and a high Offers crash performance with a low weight.

The task is therefore to provide a battery housing which provides process-reliable tightness, good utilization of the installation space and high crash performance with low weight.

The object is achieved with the features of claim 1.

The inventors have found that if at least one reinforcement in at least one section along the circumferential tub wall within the tub Form of a profile with a longitudinal extension and a transverse extension is arranged, the longitudinal extension of the profile running parallel to the tub wall, a design variant for a battery housing can be provided which overcomes the disadvantages described from the prior art, and a constructive solution in tub construction with a process-reliable tightness, a good utilization of the installation space into the corners and a high crash performance.

With the proposed design, the typically small space available can be used particularly efficiently. If the at least partially circumferential reinforcement lies within a tub, the advantages of a tub design and a tub-free design can be linked to one another. In the case of tubs of this size and vertical range of manufacture, technical manufacturing restrictions usually require (de) drafts in the tub wall of often 5 ° to 10 °, large base radii between the tub bottom and tub wall and, if there are flanges, large flange radii between the tub wall and tub flange and large and specially shaped corner radii. An arrangement of largely cuboid battery modules in a trough with at least partially circumferential reinforcement outside the trough shows disadvantages, especially in the corner areas, which can lead to a loss of usable volume of up to 10%. If the reinforcement is located within the tub in the available installation space, the reinforcement can, in contrast to the battery modules, be adapted much better to the geometric boundary conditions.

In the assembled state, the battery housing is connected to a vehicle or to a vehicle floor, in particular in a detachable manner. The trough and the cover of the battery housing, which in particular essentially corresponds to a cuboid shape, define an interior space in which the one or more battery modules can be arranged, with the battery housing being longer in the longitudinal direction of the vehicle than in the transverse direction, depending on the design . The battery housing can also be designed to be shorter in the longitudinal direction of the vehicle than in the transverse direction of the vehicle or of the same length. The at least one reinforcement in the form of a profile is arranged at least in sections along the circumferential tub wall within the tub, so that, for example, at least one section of the battery teriegehäuses is reinforced in the vehicle longitudinal direction and / or in the vehicle transverse direction. Depending on the configuration, only sections of the battery housing in the longitudinal direction of the vehicle and / or only sections of the battery housing in the transverse direction of the vehicle can be reinforced.

Longitudinal extent is to be understood as the course of the profile in the longitudinal direction and / or in the axial direction. The transverse extension runs transversely to the longitudinal extension, in particular special based on the horizontally running transverse extension in the installed state. The longitudinal extent of the profile is greater than the transverse extent by at least a factor of two, in particular by at least a factor of five, preferably by at least a factor of ten. In the simplest version, the profile can be a profile with an open cross-section.

Further advantageous refinements and developments will emerge from the following description. One or more features from the claims, the description and the drawing can be linked with one or more other features to form further embodiments of the invention. One or more features from the independent claims can also be linked by one or more other features.

In order to ensure optimal and "all-round" protection from all sides of the battery housing, according to one embodiment of the battery housing, the at least one reinforcement is arranged completely circumferentially within the tub, wherein the completely circumferential reinforcement can be composed of one or more profiles . As a result, the battery housing is reinforced both in the longitudinal direction of the vehicle and in the transverse direction of the vehicle by the completely circumferential profile, in particular over the entire circumference. The reinforcement can consist, for example, of a profile which is shaped such that it can be arranged along the circumference in a fitting manner on the tub wall. For example, a roll profile can be cut to length according to the circumferential length of the battery housing or the tub or tub wall and bent at right angles to the shape of the battery housing, which in particular essentially corresponds to a cuboid shape, at at least three points in the longitudinal direction, preferably by previous ones Partial cut in the form of a miter at the fold points to facilitate or enable the setting of a right-angled fold, so that a one-piece, frame-like reinforcement can be arranged within the tub. An alternative can be the use of tubes, which in the later corner areas, for example, V-shaped cut to the outer tube wall (outer circumference) and then bent and connected, in particular welded. In this way, a completely encircling frame can be produced in one piece or alternatively, for example, two C-shaped sections joined together to form a fully encompassing frame. Furthermore, as an alternative, several profiles, which, for example, can be L-, Z- or C-shaped in cross-section, can be assembled inside the tub to form a frame-like structure (circumferential frame), with at least four profiles, two of which are in The longitudinal direction of the vehicle and two in the transverse direction of the vehicle and their ends are each cut to a miter, so that a butt joint is made possible. Alternatively, the profiles can also be provided continuously either in the longitudinal direction of the vehicle or in the transverse direction of the vehicle within the tub, where the non-continuous profiles are brought into contact and connected at the end with the end sections of the continuous profiles. As a further alternative, four non-continuous profiles can be used, which can be connected to one another via four equal pieces in the corners to form a frame-like structure (circumferential frame), which is arranged inside the tub for reinforcement. The compensation pieces can be angle pieces or also straight pieces, whereby their cross-section does not necessarily have to correspond to the cross-section of the profiles for reinforcement. The outer corner areas of the frame-like reinforcement can be designed by trimming the end of the profiles used or by using an additional compensating piece so that they follow the geometric specifications of the corner radii or tub (wall) corners.

Because the reinforcement is arranged in the interior of the battery housing, the profile is formed from an uncoated, hardened steel material according to one embodiment of the battery housing. The tub and the cover of the Batteriegehäu ses enclose the reinforcement, so that there are no special requirements for corrosion protection, so that uncoated, hardenable steel materials are used which can be produced relatively inexpensively as flat material and, due to the lack of a coating, can also be easily formed into profiles, hardened and then joined together or with other components. For example, manganese-boron steels can be used, which provide high strengths in the hardened state and thus materials with a smaller wall thickness and thus associated with a weight advantage can be used. Manganese-boron steels with a carbon content between 0.2 and 0.6% by weight are particularly suitable, for example steels of the quality 22MnB5 or 27MnB5, preferably with a carbon content between 0.3 and 0.6% by weight, For example steels of the quality 30MnB5, 34MnB5 or 37MnB4, preferably with a carbon content between 0.4 and 0.6% by weight, for example steels of the quality 40MnB4 or 45MnB4. It is also conceivable to use other steel materials which are hardenable and in the finished state have tensile strength of at least 1500 MPa, in particular of at least 1800 MPa, preferably of at least 2000 MPa. In comparison to coated, hardened profiles, uncoated, hardened profiles can be thermally joined better and more process-stable, for example welding.

According to one embodiment of the battery housing, the profile is designed and arranged within the tub such that the side section of the profile facing away from the tub wall runs at right angles to the tub bottom. The side section of the profile or the side sections of the profiles in the direction of the interior of the Batteriegehäu ses define or define the installation space for the battery module or modules and possibly other components, so that a right-angled course of the side section or the side sections extending from the tub bottom Provides the largest possible usable volume to accommodate the battery modules and, if necessary, other components. The reinforcement can thus provide inner walls or an inner contour without bevels and in the corners, in particular, at right angles and without (larger) corner radii, while the outer walls or an outer contour of the reinforcement essentially follows the course or contour of the tubs (inside Follow the wall.

In order to guarantee a certain rigidity and / or stability of the battery housing, according to one embodiment of the battery housing, the profile is at least in sections with the tub bottom and / or with the tub wall cohesively connected. The material connection can take place, for example, by means of gluing and / or welding and / or soldering.

According to one embodiment of the battery housing, the lid has a lid base and a circumferential lid wall integrally connected to it. Such a component can, for. B. as a deep-drawn or injection-molded component made of a metallic material or possibly reinforced polymer material.

According to one embodiment of the battery housing, the cover and / or the tub has, at least in sections, a cover flange and / or tub flange connected in one piece to the cover wall and / or to the tub wall. Since larger areas can be provided for a tight connection, in particular special to accommodate an additional seal, which can be taken into account, for example, between the two flanges. The cover and the tub preferably have at least in sections a cover flange and a tub flange, the tub and cover being brought into contact via the flanges and defining a connection plane which runs essentially parallel to the tub base and / or the cover base, with the tub and cover overlying the flanges in particular are releasably connected to one another. The preferably detachable connection between the tub and the cover allows non-destructive access to the interior of the battery housing, in particular for maintenance purposes.

According to one embodiment of the battery housing, the tub and the cover are each made from a deep-drawn sheet metal material, and the drawing depths can be the same or different. The sheet metal material used is, for example, steel materials which are provided in particular with cathodic corrosion protection at least on one side, preferably on the side facing away from the interior and thus located in the wet area. Cold forming steels with an elongation at break A80 greater than 10%, in particular greater than 15%, preferably greater than 20%, are preferably used. The one-piece nature of the tub and the cover as each deep-drawn part results in a sealing of the battery housing in a simple manner. By dividing the drawing depths into the same or different ones Proportions, in particular based on the height of the interior, where the depth of the tub is preferably greater than that of the cover, tub and cover can ge compared to the conventional design, in which only the tub is deep-drawn and the cover acts as an essentially flat strike plate, in particular, the depth of draw of the tub is reduced and the corner radii are thus kept small. Since the tub and the cover enclose the reinforcement, in particular the frame-like (crash) structure composed of one or more profiles, the corner radii, as required for deep drawing, can be large, without the ( inner) usable volume. For this purpose, the at least partial, circumferential reinforcement in the corner areas should be designed with no or only a small radius on the inside, but can or may follow the corner contour of the tub (tub base and / or tub wall) resulting from manufacturing restrictions on the outside. For example, the outer walls or the outer contour of the reinforcement can follow the course or the contour of the tub (inner) wall.

According to one embodiment of the battery housing, the battery housing outside the tub, at least in sections along the circumferential tub wall, comprises at least one reinforcement in the form of a profile with a longitudinal extension and a transverse extension, which is partially connected longitudinally to the battery housing. The profile is preferably Z-shaped in cross section and a section in the transverse direction is connected to the tub bottom and a section in the transverse direction is connected to the tub flange. Preferably, the profile can be completely angeord net outside the tub along the circumferential tub wall. The provision of the profile outside the tub can contribute to increasing the stability of the battery housing. It can also serve as a defined joining surface for adjacent components such as assembly parts to fix the battery housing on the vehicle.

According to one embodiment of the battery housing, the profile arranged within the tub is a multi-chamber profile which comprises at least two chambers in cross-section, the chambers being separated from one another by at least one web. Multi-chamber profiles have one compared to open or only one Chamber having closed profiles on higher deformation resistance. The web is preferably arranged in the plane or parallel to the plane of the connection plane (tub / cover) at a distance of - / + 20 mm. This has the advantage that the force transmission path is largely uninterrupted and essentially without jumps from the sill of the vehicle via the mounting part (s) of the battery housing through the reinforcement (crash frame) and then distributed from there to a compartment structure, if available from one or more cross members and / or one or more longitudinal members running inside the tub.

According to one embodiment of the battery housing, at least the trough flange has holes along its circumference, which are used to accommodate fastening means and thus for mounting on a vehicle. If the (overlapping) section of the profile arranged outside the tub, which is in contact with the tub flange or is connected to it, is also provided in the area of the holes, the (overlapping) section of the profile arranged outside the tub is also assigned the holes in the tub flange corresponding holes. As a result, existing areas on the battery housing can be accessed without having to access additional elements that are intended to be used for mounting on a vehicle / vehicle floor. The battery housing preferably comprises additional reinforcing elements which can be arranged in the region of the holes. The reinforcement elements can be designed individually and in accordance with requirements, with the reinforcement elements being attached below the tub flange or below the (overlapping) section of the profile arranged outside the tub that contacts or is connected to the tub flange. Particularly preferably, the reinforcing elements are connected to two sections of the profile below the profile arranged outside the tub, the two sections of the profile being oriented at an angle to one another. As a result, a particularly rigid connection or assembly area can be implemented.

In the following, specific embodiments of the invention are explained in more detail with reference to the drawing. The drawing and accompanying description of the resulting features are not restrictive to the respective configurations. However, they serve to illustrate exemplary design. Furthermore, the respective features can be used with one another as well as with features of the above description for possible further developments and improvements of the invention, especially in the case of additional configurations which are not shown. The same parts are always provided with the same reference symbols.

The drawing shows in

Figure 1) a perspective view of an embodiment of a erfindungsge MAESSEN battery housing and

Figure 2) a cross-sectional view along the section A-A in Figure 1.

In Figure 1, an inventive battery housing (1) is shown in a perspective view. The battery housing (1), which can be mounted on a vehicle or vehicle floor (not shown), comprises a trough (2) which has a trough base (2.1) and a circumferential tub wall (2) integrally connected to it, and a cover (3) to close the tub (2), which, however, for the sake of clarity, exactly like the battery module or battery modules that can be arranged in the tub (2) are not shown in FIG.

Inside the tub (2) is at least partially along the circumferential tub wall (2.2) at least one reinforcement (4) in the form of a profile (4.1, 4.2, 4.3) with a longitudinal extension (L) and a transverse extension (Q), the The longitudinal extension (L) of the profile (4.1, 4.2) runs parallel to the tub wall (2.2). The at least one reinforcement (4) is preferably arranged completely circumferentially within the trough (2), it being possible for the completely circumferential reinforcement (4) to be composed of one (not shown) or several profiles (4.1, 4.2, 4.3). To form the at least one reinforcement (4) in the form of a frame-like structure within the tub (2), at least four profiles (4.1, 4.2), two of which run in the longitudinal direction of the vehicle and two in the transverse direction of the vehicle, with their ends being able to be mitred (not shown), which do not run continuously, can be used, so that they can be connected to one another via four compensating pieces (4.3) in the corners to form a completely circumferential reinforcement (4), respectively, frame-like structure. The profiles (4.1) can, depending on the size and connection to a vehicle, run either parallel in the longitudinal direction or in the transverse direction of the vehicle.

In addition to the fully encircling reinforcement (4) within the tub (2), additional profiles (7, 8), in Figure 1 specifically a continuous profile (8), for example a longitudinal beam (8) which runs parallel to the profiles (4.1) , and 14 short profiles (7), for example cross members (7), which each run parallel to one another and parallel to the profiles (4.2), arranged in the interior of the tub (2) in the form of a compartment structure, which compartments for receiving the not shown Provide battery modules and, if necessary, other components. The number and arrangement of the profiles (7, 8) for the formation of a specialist structure can be adapted individually and as required.

Outside the tub (2), at least in sections along the circumferential tub wall (2.2), at least one reinforcement (5) in the form of a profile with a longitudinal extension (L) and a transverse extension (Q) is arranged, which in some areas has a longitudinal extension (L) with the Battery housing (1) is connected.

In the assembled state, the battery housing (1) is in particular releasably connected to a vehicle floor (not shown), the tub flange (2.3) of the battery housing (1) having holes (2.4) along its circumference, which are used to accommodate fasteners (screws, not shown) , Bolts etc.) and are therefore used for mounting on a vehicle. To reinforce the connection or assembly area, the battery housing (1) comprises additional reinforcing elements (6) which can be arranged in the area of the holes (2.4).

FIG. 2 shows a cross-sectional view along section AA in FIG. 1, the profile (7) not being shown, but the cover (3) being shown for the sake of completeness. The cover (3) has a cover base (3.1) and an encircling cover wall (3.2) that is integrally bonded to it. The cover (3) and the tub (2) have at least sections of a cover flange (3.3) and tub flange (2.3) which are integrally connected to the cover wall (3.2) and to the tub wall (2.2). The pan (2) and cover (3) brought into contact via the flanges (2.3, 3.3) define kidney a connection plane (B), which runs essentially parallel to the trough bottom (2.1) and / or the lid bottom (3.1), the trough (2) and lid (3) being particularly releasably connected to one another via the flanges (2.3, 3.3).

The at least one reinforcement (4) in the form of a profile (4.1, 4.2, 4.3) is formed and arranged within the tub (2) in such a way that the side section (4 ^* ) of the profile (4.1, facing away from the tub wall (2.2)) 4.2, 4.3) runs at right angles to the bottom of the tub (2.1). The profile (4.1, 4.2, 4.3) can be materially connected to the tub bottom (2.1) and / or to the tub wall (2.2) at least in sections. The profile (4.1, 4.2, 4.3) arranged within the tub (2) is preferably a multi-chamber profile which comprises at least two chambers (4.4, 4.5) in cross-section, the chambers (4.4, 4.5) via at least one web (4 ^{* *} ) are separated from each other. The web (4 ^** ) is preferably arranged in the connection plane (B) or parallel to the connection plane (B) at a distance of −20 mm <= B <= + 20 mm.

The battery housing (1) comprises outside the tub (2) at least partially along the circumferential tub wall (2.2) at least one reinforcement (5) in the form of a profile with a longitudinal extension (L) and a transverse extension (Q). The reinforcement or the profile (5) is preferably designed Z-shaped in cross-section, with a section (5.1, 5.1 ^* ) in transverse extension (Q) with the trough bottom (2.2) and a section (5.3) in transverse extension (Q) is connected to the tub flange (2.3). The profile (5) can preferably be arranged outside the tub (2) completely along the circumferential tub wall (2.2). If the (overlapping) section (5.3) of the profile (5) arranged outside the tub (2), which is in contact with the tub flange (2.3) or is connected to it, is also provided in the area of the holes (2.4), so also has the section (5.3) of the profile (5) to the holes (2.4) in the tub flange (2.3) corresponding holes (not shown).

The battery housing (1) comprises additional reinforcing elements (6), which can be arranged in front of the holes (2.4) preferably. The reinforcing elements (6) are particularly preferably arranged below the outside of the tub (2) Neten profile (5) connected to two sections (5.2, 5.3) of the profile (5), the two sections (5.2, 5.3) of the profile (5) being oriented at an angle to one another.

Because the reinforcement (4) is arranged in the interior of the battery housing (1), the profiles (4.1, 4.2, 4.3, 7. 8) can be formed from an uncoated, hardened steel material. As a result, steels with higher strengths and lower material thicknesses can be used and thus contribute to the weight reduction of the entire battery housing (1). The tub (2) and the cover (3) are preferably each formed from a deep-drawn sheet metal material, in particular consist of a steel material, the drawing depths (tw, tD) being able to be identical or different. The distance (t) between the tray base (2.1) and the cover base (3.1) essentially corresponds to the sum of the draw depth (tW) of the trough (2) and the draw depth (tD) of the cover (3). By dividing the drawing depths (tW, tD) into equal or different proportions, in particular based on the height (t) of the interior space, between the trough bottom (2.1) and the lid base (3), the drawing depth (tW) of the trough (2 ) be designed to be greater than the drawing depth (tD) of the cover (3), for example in a ratio between 70% to 30% and 40% to 60%.

Claims

1. The battery housing (1), which can be mounted on a vehicle floor, comprises a trough (2) which has a trough base (2.1) and a circumferential tub wall (2.2) connected to it in pieces, in which one or more battery modules can be arranged, and a lid (3) for closing the tub (2),

characterized in that

inside the tub (2) at least in sections along the circumferential tub wall (2.2) at least one reinforcement (4) in the form of a profile (4.1, 4.2, 4.3) with a longitudinal extension (L) and a transverse extension (Q) is arranged, the The longitudinal extension (L) of the profile (4.1, 4.2, 4.3) runs parallel to the tub wall (2.2).

2. Battery housing according to claim 1, wherein the at least one reinforcement (4) is arranged completely circumferentially within the trough (2), the completely circumferential reinforcement (4) being composed of one or more profiles (4.1, 4.2, 4.3).

3. Battery housing according to one of the preceding claims, wherein the profile (4.1, 4.2, 4.3) is formed from an uncoated, hardened steel material.

4. Battery housing according to one of the preceding claims, wherein the profile (4.1, 4.2, 4.3) is designed and arranged within the tub (2) that the side section (4 *) of the Pro fils (4.1) facing away from the tub wall (2.2) , 4.2, 4.3) runs at right angles to the tank bottom (2.1).

5. Battery housing according to one of the preceding claims, wherein the profile (4.1, 4.2, 4.3) are at least partially connected to the tub bottom (2.1) and / or to the tub wall (2.2) with a material bond.

6 battery housing according to one of the preceding claims, wherein the cover (3) has a cover base (3.1) and an integrally connected circumferential cover wall (3.2).

7. Battery housing according to one of the preceding claims, wherein the cover (3) and / or the trough (2) at least in sections a cover flange (3.3) and / or connected in one piece to the cover wall (3.2) and / or to the trough wall (2.2) or tub flange (2.3).

8. Battery housing according to claim 7, wherein the cover (3) and the trough (2) at least in sections have a cover flange (3.3) and a trough flange (2.3), the trough (2) and cover (3) over the flanges (2.3 , 3.3) are brought into contact and define a connection plane (B) which runs essentially parallel to the tub base (2.1) and / or the cover base (3.1), with the tub (2) and cover (3) via the flanges (2.3, 3.3 ) are in particular releasably connected to one another.

9. Battery housing according to one of the preceding claims, wherein the Wan ne (2) and the cover (3) are each formed from a deep-drawn sheet metal material, the drawing depths (tW, tD) being the same or different leads out.

10. Battery housing according to one of the preceding claims, wherein the battery housing (1) outside the tub (2) at least in sections along the circumferential tub wall (2.2) at least one reinforcement in the form of a profile (5) with a longitudinal extension (L) and transverse extension ( Q), which is connected to the battery housing (1) in regions in the longitudinal extension (L).

11. Battery housing according to claim 10, wherein the profile (5) is designed to be z-shaped in cross-section and a section (5.1 *) in transverse extension (Q) with the tray bottom (2.1) and a section (5.3) in transverse extension ( Q) is connected to the tub flange (2.3).

12. Battery housing according to one of the preceding claims, wherein the profile (4.1, 4.2, 4.3) is a multi-chamber profile which has at least two chambers (4.4, 4.5) in cross section, the chambers (4.4, 4.5) being separated from one another by at least one web (4 **).

13. Battery housing according to claim 12, wherein the web in the connection plane (B) or parallel to the connection plane (B) is arranged at a distance of - / + 20 mm.

14. Battery housing according to one of the preceding claims, wherein the indest the tub flange (2.3) has holes (2.4) along its circumference, which are used to accommodate fastening means and thus for mounting on a vehicle.

15. Battery housing according to claim 13, wherein the battery housing comprises additional reinforcing elements (6) which are arranged in the region of the holes (2.4).