CN113597705A

CN113597705A - Battery case

Info

Publication number: CN113597705A
Application number: CN202080020650.6A
Authority: CN
Inventors: 丹尼尔·尼霍夫; 托马斯·施泰尔
Original assignee: ThyssenKrupp Steel Europe AG
Current assignee: ThyssenKrupp Steel Europe AG
Priority date: 2019-03-13
Filing date: 2020-03-05
Publication date: 2021-11-02
Anticipated expiration: 2040-03-05
Also published as: WO2020182594A1; DE102019203400A1; CN113597705B

Abstract

The invention relates to a battery housing (1) which can be mounted on the vehicle underbody and which comprises a groove (2) and a cover (3) for closing the groove (2), wherein the groove (2) has a groove bottom (2.1) and a circumferential groove wall (2.2) connected integrally thereto, wherein one or more battery modules can be arranged in the groove, wherein, inside the groove (2), at least in sections along the circumferential groove wall (2.2), at least one reinforcement (4) in the form of a profile (4.1, 4.2, 4.3) having a longitudinal extent (L) and a transverse extent (Q) is arranged, wherein the longitudinal extent (L) of the profile (4.1, 4.2, 4.3) runs parallel to the groove wall (2.2).

Description

Battery case

Technical Field

The invention relates to a battery housing which can be mounted at the vehicle underbody and which comprises a groove with a groove bottom and a surrounding groove wall integrally connected thereto, in which groove one or more battery modules can be arranged, and a cover for closing the groove.

Background

The continued electrification of automobiles and the desire of customers for high range of travel for such vehicles requires the development of high performance battery designs. The housing for such a battery/battery module accordingly often has an extension over the entire floor of the vehicle. Creating complex requirements in terms of structural space, weight, crash performance, tightness, corrosion, fire protection, electromagnetic shielding, etc.

Due to low cost, good manufacturability, high impact performance and good electromagnetic shielding, the structural space surrounding the battery module is usually sealed by a thin-walled metal housing. Two basic embodiments are known in particular from the prior art: the first group of cell housings is constructed from sheet, cast and/or profile elements, see for example DE 102016110330 a 1. They have a good relationship between crash performance and structural space requirements in terms of a sealed interior space which can be used effectively for the battery module. One great challenge is the tightness of the cell space, in particular at the corners, since there are many cases where a plurality of components must be joined to one another and thus the tightness is not impaired. The second group is battery cases in which the sealed battery space is formed, for example, by deep-drawing, folding or bending, but in each case in principle trough-like components in combination with a lid connected to the open side of the trough. This results in a design of the shell structure (channel structure) to be sealed easily, see for example DE 102016116729 a 1.

In order to achieve the required crash performance also in the form of a trough structure, the trough is usually surrounded on the outside in the wet area by a surrounding crash frame, or the trough is suspended in such a crash frame, see for example DE 102016121247 a 1.

Inside the tank, the lattice structure usually provides additional rigidity, see for example DE 102016209853 a 1. In general, one limitation, in particular in the largely rounded corners of the trough-shaped component, is the poor availability of the available installation space for the predominantly square battery module. Solutions for this are given, for example, in WO 2018/210420 a 1.

Furthermore, the separation of the dry and wet areas inside or outside the tank decisively determines the material choice. The analysis shows that, in particular for crash frames, the use of hot-formed steel is recommended because of the higher strength and only a small permissible deformation space. However, the use of hot formed steel is not possible due to the general lack of cathodic corrosion protection in wet areas, so that galvanized cold formed steel with lower strength and the greater weight associated therewith must be considered.

For this reason, a design variant of a battery housing is provided which combines the advantages of both designs and which provides a design solution for a battery housing in the form of a trough-like design with process-safe tightness, good utilization of the installation space up to the corners and good crash performance in the case of a low weight.

Disclosure of Invention

It is therefore an object of the present invention to provide a battery housing which, while being lightweight, offers reliable sealing, good utilization of the installation space and high crash performance.

This object is achieved by the features of claim 1.

The inventors have found that, when at least one reinforcement in the form of a profile having a longitudinal extent and a transverse extent is arranged inside the groove at least in sections along the surrounding groove wall, wherein the longitudinal extent of the profile runs parallel to the groove wall, it is possible to provide a design variant for a battery housing which overcomes the disadvantages described by the prior art and provides a design in the form of a groove structure which has process-safe sealing properties, good utilization of the structural space up to the corner and high crash performance.

The proposed construction makes it possible to use the typically small available construction space particularly effectively. The advantages of the groove-and non-groove construction can be combined with one another if the at least partially circumferential reinforcement is located in the groove. In such a groove of size and working depth, the limitations of the working technique usually require a (demolded) forming bevel, typically 5 ° to 10 °, in the groove wall, a large base radius between the groove base and the groove wall, and, if a flange is present, a large flange radius between the groove wall and the groove flange, and a large and specially formed corner radius. The arrangement of battery modules, which are as far as possible cuboids in the groove, with reinforcing elements which surround the groove at least in sections exhibits disadvantages, in particular in the corner regions, which can lead to a loss of up to 10% of the service volume. If the reinforcement is located in the groove in the existing installation space, the reinforcement opposite the battery module can be adapted to the geometrical boundary conditions significantly better.

The battery housing is in particular releasably connected to the vehicle or to the vehicle underbody in the installed state. The groove and the cover of the battery housing define an interior space, which in particular substantially corresponds to a cuboid, in which one or more battery modules can be arranged, wherein according to an embodiment the battery housing can be configured longer in the vehicle longitudinal direction than in the vehicle transverse direction. The battery case may also be configured to be shorter or have the same length in the vehicle longitudinal direction than in the vehicle lateral direction. At least one reinforcement in the form of a profile is arranged at least in sections along the circumferential groove wall inside the groove, so that at least one section of the battery housing is reinforced in the longitudinal and/or transverse direction of the vehicle, for example. Depending on the design, it is also possible to reinforce only the battery housing section in the longitudinal direction of the vehicle and/or to reinforce only the battery housing section in the transverse direction of the vehicle.

Longitudinal extension is to be understood as meaning the course of the profile in the longitudinal direction and/or the axial direction. The transverse extent runs transversely to the longitudinal extent, in particular transversely to the horizontal in the installed state. The longitudinal extension of the profile is at least two times greater, in particular at least five times greater, preferably at least ten times greater, than the transverse extension. In the simplest embodiment, the profile can be a profile which is open in cross section.

Further advantageous embodiments and improvements emerge from the following description. One or more of the features of the claims, the description and the drawings may be used in combination with one or more other features thereof in a further design of the invention. One or more features from the independent claims may also be combined with one or more other features.

In order to ensure an optimal "wraparound" protection from all sides of the battery housing, according to one embodiment of the battery housing, at least one reinforcement is arranged completely circumferentially in the groove, wherein the completely circumferential reinforcement can consist of one or more profile parts. The battery housing is thereby reinforced both in the longitudinal direction of the vehicle and in the transverse direction of the vehicle, in particular over the entire circumference, by the completely circumferential profile. The reinforcement can consist, for example, of a profile which is designed in such a way that it can be arranged in the circumferential direction on the groove wall. For example, the rolled profile can be cut according to the circumferential length of the cell housing or of the groove or groove wall and the right-angled fold is made at least three points in the longitudinal extension to the shape of the cell housing, which in particular corresponds approximately to the cuboid shape, preferably by means of a preceding partial cut in the form of a bevel (Teilbeschnitt) at the fold location, in order to simplify or achieve the arrangement of the right-angled fold, so that the integral frame-like reinforcement can be arranged in the groove. An alternative may be to use a tube which in the subsequent corner regions is cut, for example V-shaped, up to the outer tube wall (outer circumference) and then bent and connected, in particular welded. In this way, a completely circumferential frame can be produced in one piece, or alternatively, for example, two mutually joined C-shaped sections can also be produced as a completely circumferential frame. Furthermore, optionally, a plurality of profiles (which may be embodied, for example, in cross section, in an L-shape, Z-shape or C-shape) can be assembled in the groove to form a frame-like structure (encircling frame), wherein at least four profiles, two of which run in the vehicle longitudinal direction and two extend in the vehicle transverse direction, and the ends of which are respectively cut off at a chamfer, so that a butt connection is achieved. Alternatively, the profile can also be arranged in the groove continuously in the longitudinal direction of the vehicle or in the transverse direction of the vehicle, respectively, wherein the discontinuous profile is in contact with and connected to the end section of the continuous profile at the end face. As a further alternative, four discontinuous profiles can be used, which can be connected to one another via corresponding four compensation elements in the corners to form a frame-like structure (encircling frame) which is arranged in the groove for reinforcement. The compensating elements can be angle-shaped elements or also straight elements, wherein their cross-section does not necessarily have to correspond to the cross-section of the profile for reinforcement. The outer corner regions of the frame-shaped reinforcement can therefore be designed by the end sections of the profiles used or by using additional compensation elements in such a way that they follow the geometric shape of the corner radii or the groove (wall) corners.

Since the reinforcement is arranged in the interior of the battery housing, according to one embodiment of the battery housing, the profile is formed from an uncoated, quenched steel material. The groove and the cover of the battery housing enclose the reinforcement so that no special requirements are made with regard to corrosion protection, so that uncoated, quenchable steel materials can be used, which can be produced relatively inexpensively as flat materials and, owing to the lack of a coating, can also be formed into profiles without complications, quenched and can then be joined to one another or to other components. Thus, for example, manganese boron steel can be used which provides high strength in the quenched state, and therefore materials having a smaller wall thickness and the weight advantages associated therewith can be used. Particularly suitable are manganese boron steels with a carbon content of between 0.2 and 0.6 wt.%, for example steels of the quality 22MnB5 or 27MnB5, preferably steels with a carbon content of between 0.3 and 0.6 wt.%, for example steels of the quality 30MnB5, 34MnB5 or 37MnB4, preferably steels with a carbon content of between 0.4 and 0.6 wt.%, for example steels of the quality 40MnB4 or 45MnB 4. Other steel materials which are quenchable and which in the finished state have a tensile strength of at least 1500MPa, in particular at least 1800MPa, preferably at least 2000MPa, are also conceivable. The uncoated, quenched profile can be thermally bonded, e.g., welded, better and more process stable than the coated, quenched profile.

According to one embodiment of the battery housing, the profile is designed and arranged in the groove in such a way that a side section of the profile facing away from the groove wall runs at right angles to the groove bottom. The one or more side sections of the profile define a structural space for the one or more battery modules and, if appropriate, further components in the direction of the interior of the battery housing, so that the right-angled course of the one or more side sections, proceeding from the groove bottom, provides as large a use volume as possible for accommodating the battery modules and, if appropriate, further components. Thus, it is possible to provide, by means of the reinforcement, an inner wall or contour without a slope and in the corners, in particular at right angles, and without a (larger) corner radius, while the outer wall or contour of the reinforcement essentially follows the course or contour of the (inner) groove wall.

In order to ensure a certain rigidity and/or stability of the battery housing, according to one embodiment of the battery housing, the profile is connected at least in sections to the groove bottom and/or the groove wall in a material-fitting manner. The material fit can be achieved, for example, by means of gluing and/or welding and/or soldering.

According to one embodiment of the battery housing, the cover has a cover base and a circumferential cover wall which is integrally connected to the cover base. Such components can be, for example, deep-drawn or injection-molded components made of metallic materials or, if appropriate, reinforced polymer materials.

According to one embodiment of the battery housing, the cover and/or the groove have, at least in sections, cover and/or groove flanges which are integrally connected to the cover and/or groove walls. In this way, a larger area can be provided for the sealing connection, in particular for accommodating additional sealing elements, which can be considered, for example, between the two flanges. Preferably, the cover and the groove have, at least in sections, a cover flange and a groove flange, wherein the groove and the cover are in contact via the flange and define a connection plane running substantially parallel to the groove bottom and/or the cover bottom, wherein the groove and the cover are in particular releasably connected to one another via the flange. The preferably releasable connection between the groove and the cover allows damage-free access to the interior space of the battery housing, in particular for maintenance purposes.

According to one embodiment of the battery housing, the groove and the cover are each formed from a deep-drawn sheet metal material, wherein the drawing depth can be implemented identically or differently. As sheet material, for example, a steel material is used which is provided with cathodic corrosion protection, in particular at least on one side, preferably on the side facing away from the interior space and thus in the wet area. Preference is given to using cold-formed steels having an elongation at break a80 of more than 10%, in particular more than 15%, preferably more than 20%. The sealing of the battery housing is achieved in a simple manner due to the integration of the groove and the cover, respectively, as deep-drawn parts. By dividing the drawing depth into equal or different portions, in particular on the basis of the height of the interior space, wherein preferably the drawing depth of the groove is greater than the drawing depth of the lid, the groove and the lid are able to reduce in particular the drawing depth of the groove and thus also the corner radius relative to conventional construction types, in which only the groove is deep-drawn and the lid serves as a substantially flat closure sheet. Since the wall and the cover enclose the reinforcement, in particular the frame-like (crash) structure consisting of one or more profiles, the corner radius can be larger, as required for deep drawing, without the (internal) use volume being reduced as a result. For this purpose, the at least partially circumferential reinforcement in the corner region should be implemented with as little or no radius as possible on the inside, but may or may allow the corner contour of the groove (groove bottom and/or groove wall) to follow on the outside as a result of manufacturing constraints. Thus, for example, the outer wall or the outer contour of the reinforcement can follow the course or contour of the (inner) groove wall.

According to one embodiment of the battery housing, the battery housing comprises, outside the groove, at least in sections along the circumferential groove wall, at least one reinforcement in the form of a longitudinally extending and transversely extending profile, which is connected to the battery housing, for example, in the longitudinal extension. Preferably, the profile is z-shaped in cross section, and one section in the transverse extension is connected to the groove bottom and one section in the transverse extension is connected to the groove flange. Preferably, the profile can be arranged completely along the surrounding groove wall outside the groove. Providing a profile outside the groove may help to increase the stability of the battery housing. Furthermore, it can be used as a defined joining surface for adjoining components, for example for a mounting part for fixing the battery housing at the vehicle.

According to one embodiment of the battery housing, the profile arranged in the groove is a multi-chamber profile which comprises at least two chambers in cross section, wherein the chambers are separated from one another by at least one web. Multi-cavity profiles have a higher deformation resistance than open profiles or closed profiles with only one cavity. Preferably, the tabs are arranged in the plane of the connection plane (slot/cover) or in a plane parallel to the connection plane (slot/cover) at a distance of-/+ 20 mm. This has the advantage that the force transmission path is guided as uninterrupted as possible and substantially without jumps from the vehicle sill via one or more mounting parts of the battery housing via the reinforcement (crash frame) and from there is distributed to the lattice structure (if present) consisting of one or more transverse beams and/or one or more longitudinal beams running in the groove.

According to one embodiment of the battery housing, at least the groove collar has a plurality of holes along its circumference for receiving fastening means and thus for mounting on a vehicle. If in the region of the hole there is also provided an (overlapping) section of the profile arranged at the portion of the groove, which is in contact with the groove flange or is connected thereto, the (overlapping) section of the profile arranged outside the groove also has a hole corresponding to the hole in the groove flange. This makes it possible to use the already existing regions of the battery housing without having to use other elements for mounting at the vehicle/vehicle underbody. Preferably, the battery housing comprises an additional reinforcing element which can be arranged in the region of the aperture. The design of the reinforcing element can be carried out individually and as desired, wherein the connection of the reinforcing element takes place below the groove flange or below a (overlapping) section of the profile arranged outside the groove, which (overlapping) section is in contact with or connected to the groove flange. It is particularly preferred that the reinforcing element is connected below the profile arranged outside the groove at two sections of the profile, wherein the two sections of the profile are oriented at an angle to each other. A particularly rigid connection or mounting region can thereby be implemented.

Drawings

The following describes in detail a specific embodiment of the present invention with reference to the drawings. The drawings and the accompanying description of the resulting features should not be understood as being limited to the respective designs, but are intended to illustrate exemplary designs. Furthermore, the individual features can be used with one another and also with the features described above for possible further developments and improvements of the invention, in particular in additional embodiments which are not shown. Like parts are provided with like reference numerals throughout.

The figures show

FIG. 1 shows a perspective view of one embodiment of a battery housing according to the invention, and

fig. 2 shows a cross-sectional view along section a-a in fig. 1.

Detailed Description

Fig. 1 shows a battery housing (1) according to the invention in a perspective view. The battery housing (1), which can be mounted on a vehicle or at the bottom of a vehicle, not shown, comprises a groove (2) and a cover (3) for closing the groove (2), the groove (2) having a groove bottom (2.1) and a surrounding groove wall (2.2) integrally connected thereto, although for the sake of clarity the cover and one or more battery modules, which can be arranged in the groove (2), are not shown in fig. 1.

Inside the groove (2), at least one reinforcement (4) in the form of a profile (4.1, 4.2, 4.3) having a longitudinal extent (L) and a transverse extent (Q) is arranged at least in sections along the circumferential groove wall (2.2), wherein the longitudinal extent (L) of the profile (4.1, 4.2) runs parallel to the groove wall (2.2). Preferably, the at least one reinforcement (4) is arranged completely around the inside of the groove (2), wherein the completely surrounding reinforcement (4) can consist of a profile (not shown) or a plurality of profiles (4.1, 4.2, 4.3). In order to form at least one reinforcement (4) in the form of a frame-like structure in the groove (2), at least four profiles (4.1, 4.2) can be used, two of which extend in the longitudinal direction of the vehicle and two of which extend in the transverse direction of the vehicle, wherein the ends thereof can each be beveled (not shown), said four profiles not extending continuously, so that they can each be connected to one another by four compensation elements (4.3) in the corners to form a completely encircling reinforcement (4) or frame-like structure. The profile (4.1) can extend in the longitudinal direction of the vehicle or in the transverse direction of the vehicle, depending on the size and the connection to the vehicle, parallel in the installed state.

In addition to the completely circumferential reinforcement (4) in the channel (2), additional profiles (7, 8), in particular a continuous profile (8) in fig. 1, for example a longitudinal beam (8) running parallel to the profile (4.1), are arranged inside the channel (2) in the form of a lattice structure (Fachstruktur); and 14 short profiles (7), for example cross beams (7) which each run parallel to one another and to the profile (4.2), which provide a grid for accommodating battery modules, not shown, and possibly further components. The number and arrangement of the profiles (7, 8) used for producing the lattice structure can be adapted individually and as required.

Outside the groove (2), at least one reinforcement (5) in the form of a profile having a longitudinal extent (L) and a transverse extent (Q) is arranged at least in sections along the circumferential groove wall (2.2), said reinforcement being connected to the battery housing (1) in regions of the longitudinal extent (L).

The battery housing (1) is in particular releasably connected to the vehicle floor (not shown) in the installed state, wherein the groove flange (2.3) of the battery housing (1) has a hole (2.4) along its periphery for receiving a fastening means (screws, bolts, etc.) which is not shown and thus for installation to the vehicle. In order to reinforce the connection or mounting region, the battery housing (1) comprises additional reinforcing elements (6), which can be arranged in the region of the openings (2.4).

Fig. 2 shows a cross-sectional view along the section a-a in fig. 1, wherein the profile (7) is not shown, but the cover (3) is shown for the sake of completeness. The lid (3) has a lid base (3.1) and a circumferential lid wall (3.2) integrally connected thereto. The cover (3) and the groove (2) have, at least in sections, a cover flange (3.3) and a groove flange (2.3) which are integrally connected to the cover wall (3.2) and the groove wall (2.2). The groove (2) and the cover (3) which are in contact via the flanges (2.3, 3.3) define a connection plane (B) which extends substantially parallel to the groove bottom (2.1) and/or the cover bottom (3.1), wherein the groove (2) and the cover (3) are in particular releasably connected to one another via the flanges (2.3, 3.3).

The reinforcement (4) in the form of at least one profile (4.1, 4.2, 4.3) is designed and arranged inside the groove (2) in such a way that a side section (4) of the profile (4.1, 4.2, 4.3) facing away from the groove wall (2.2)^*) Extends at right angles to the groove bottom (2.1). The profile (4.1, 4.2, 4.3) can be connected to the groove bottom (2.1) and/or to the groove wall (2.2) in a material-fit manner at least in sections. Preferably, the profile (4.1, 4.2, 4.3) arranged in the groove (2) is a multi-cavity profile which encloses at least two cavities (4.4, 4.5) in cross section, wherein the cavities (4.4, 4.5) are connected via at least one web (4)^**) Are separated from each other. Preferably the tab (4)^**) 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 groove (2), at least in sections along the circumferential groove wall (2.2), at least one reinforcement (5) in the form of a profile having a longitudinal extent (L) and a transverse extent (Q). The reinforcement or profile (5) is preferably z-shaped in cross section, wherein the sections (5.1 ) in the transverse extension (Q) are^*) Is connected to the groove base (2.2) and the section (5.3) in the transverse extension (Q) is connected to the groove flange (2.3). Preferably, the profile (5) can be arranged completely along the circumferential groove wall (2.2) outside the groove (2). If the section (5.3) of the profile (5) arranged outside the groove (2) that is in contact with the groove collar (2.3) or is connected to the groove collar (5) (that overlaps) is also provided in the region of the hole (2.4), this section (5.3) of the profile (5) also has a hole (not shown) that corresponds to the hole (2.4) in the groove collar (2.3).

The battery housing (1) comprises additional reinforcing elements (6), which are preferably arranged in the region of the openings (2.4). Particularly preferably, the reinforcing element (6) is connected to two sections (5.2, 5.3) of the profile (5) below the profile (5) arranged outside the groove (2), wherein the two sections (5.2, 5.3) of the profile (5) are oriented at an angle to one another.

By arranging the reinforcement (4) 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. Thereby, steel having high strength and a small material thickness can be used, and thereby the weight reduction of the entire battery case (1) can be facilitated.

The groove (2) and the cover (3) are preferably each formed from a deep-drawn sheet metal material, in particular a steel material, wherein the drawing depths (tw, tD) can be implemented identically or differently. The distance (t) between the groove bottom (2.1) and the cover bottom (3.1) substantially corresponds to the sum of the drawing depth (tW) of the groove (2) and the drawing depth (tD) of the cover (3). By dividing the drawing depth (tW, tD) into equal or different portions, in particular based on the height (t) of the inner space between the groove bottom (2.1) and the lid bottom (3), preferably the drawing depth (tW) of the groove (2) can be implemented to be greater than the drawing depth (tD) of the lid (3), for example in proportions of 70% to 30% and 40% to 60%.

Claims

1. A battery housing (1) which can be mounted at the bottom of a vehicle, comprising a groove (2) having a groove bottom (2.1) in which one or more battery modules can be arranged and a surrounding groove wall (2.2) integrally connected thereto, and a cover (3) for closing the groove (2),

it is characterized in that the preparation method is characterized in that,

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

2. The battery housing according to claim 1, wherein at least one of the reinforcements (4) is arranged completely circumferentially within the groove (2), wherein the completely circumferential reinforcement (4) consists of one or more profiles (4.1, 4.2, 4.3).

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

4. Battery housing according to one of the preceding claims, wherein the profile (4.1, 4.2, 4.3) is configured and arranged within the groove (2) in such a way that a side section (4) of the profile (4.1, 4.2, 4.3) facing away from the groove wall (2.2)^*) Runs at right angles to the groove bottom (2.1).

5. Battery housing according to one of the preceding claims, wherein the profile (4.1, 4.2, 4.3) is connected in a material-fit manner at least in sections with the groove bottom (2.1) and/or with the groove wall (2.2).

6. The battery housing according to one of the preceding claims, wherein the cover (3) has a cover bottom (3.1) and a surrounding cover wall (3.2) integrally connected thereto.

7. The battery housing as claimed in one of the preceding claims, wherein the cover (3) and/or the groove (2) have, at least in sections, a cover flange (3.3) and/or a groove flange (2.3) integrally connected to the cover wall (3.2) and/or the groove wall (2.2).

8. Battery housing according to claim 7, wherein the cover (3) and the groove (2) have a cover flange (3.3) and a groove flange (2.3) at least in sections, wherein the groove (2) and the cover (3) are in contact via the flanges (2.3, 3.3) and define a connection plane (B) running substantially parallel to a groove base (2.1) and/or a cover base (3.1), wherein the groove (2) and the cover (3) are in particular releasably connected to one another via the flanges (2.3, 3.3).

9. The battery housing according to one of the preceding claims, wherein the groove (2) and the cover (3) are each constructed from deep-drawn sheet material, wherein the drawing depths (tW, tD) are embodied identically or differently.

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

11. Battery housing according to claim 10, wherein the profile (5) is z-shaped in cross section and has a section (5.1) in the transverse extension (Q)^*) Is connected to the groove bottom (2.1) and a section (5.3) in the transverse extension (Q) is connected to the groove 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 comprising at least two chambers (4.4, 4.5) in cross-section, wherein the chambers (4.4, 4.5) are connected by at least one web (4)^**) Are separated from each other.

13. The battery case according to claim 12, wherein the tabs are arranged in a connection plane (B) or are arranged parallel to the connection plane (B) at a spacing of-/+ 20 mm.

14. A battery housing according to any of the preceding claims, wherein at least the groove flange (2.3) has a hole (2.4) along its circumference for accommodating a fixing means and thereby for mounting at a vehicle.

15. The battery housing as claimed in claim 13, wherein the battery housing comprises a plurality of additional stiffening elements (6) which are arranged in the region of the aperture (2.4).