Extruded profile for a battery housing of a motor vehicle, arrangement and battery housing

Abstract

The invention relates to an extruded profile (12) for a battery housing of a motor vehicle, which is essentially cuboid-shaped and has at least one contact side (18) for contacting another extruded profile (14), wherein the extruded profile (12) and the other extruded profile (14) are designed to be welded to one another on the contact side (18), wherein the contact side (18) has a recess (24) in the cross-section of the contact side (18) viewed towards the other extruded profile (14) between two contact points (22) of the contact side (18), which are essentially formed at a respective corner of the contact side (18). The invention further relates to an arrangement (10) and to a battery housing.

Description

The invention relates to an extruded profile for a battery housing of a motor vehicle, which is substantially cuboidal, having at least one contact side for contact with a further extruded profile, wherein the extruded profile and the further extruded profile are designed for welding to one another on the contact side.The invention further relates to an arrangement having at least one extruded profile and a further extruded profile, and to a battery housing having a corresponding arrangement.The battery housing is substantially made of rectangular extruded aluminum profiles (SPP) which are arranged on one another transversely to the direction of travel and are connected to one another by means of a welding method. The extruded profiles joined together form the battery housing. In turn, several cell modules are inserted into each extruded profile.In order to be able to join the extruded profiles, in particular by laser welding methods, the joint must be machined. Since the extruded profiles have very high tolerances and the installation space is very limited, a corresponding geometry of the joint is necessary.DE 10 2016 125 693 A1 discloses battery supports for receiving at least one electric battery in a vehicle, having: a hollow chamber profile having a hollow chamber which is bounded by a base wall and a ceiling wall, wherein the electric battery can be placed on the ceiling wall; and a heat exchanger structure for tempering the electric battery, wherein the heat exchanger structure is formed within a ceiling wall section of the ceiling wall and comprises at least one hollow channel which passes through the ceiling wall.It is the object of the present invention to provide an extruded profile, an arrangement and a battery housing, by means of which a battery housing can be provided in a manner reduced in installation space.This object is achieved by an extruded profile, an arrangement and a battery housing according to the independent patent claims. Advantageous embodiments are specified in the dependent claims.One aspect of the invention relates to an extruded profile for a battery housing of a motor vehicle, which is of substantially cuboidal design, having at least one contact side for contact with a further extruded profile, wherein the extruded profile and the further extruded profile are designed for welding to one another on the contact side.It is provided here that the application side has a depression, as viewed in the cross section of the application side, toward the further extruded profile between two application points of the application side, which are formed substantially at a respective corner of the application side.In other words, tolerance compensation over the entire system is proposed, on the basis of an optimized joint geometry. Furthermore, an optimized connection of the extruded profiles can also be realized with additional material by welding methods, for example laser welding methods, as well as a prevention of fission corrosion. The workpiece tolerances can be compensated between the individual extruded profiles in that the joining regions are partially machined, partially on one side, partially on both sides.In particular, a cost- and weight-favorable geometry of the joint is thus proposed. A defined gap is set by means of this optimized joint, whereby the problem of fission corrosion is prevented.According to an advantageous embodiment, the two extruded profiles are designed to be welded to one another at respective contact points by means of a laser welding method. In particular, it can be provided, for example, that additional material is arranged between the extruded profiles, in particular the respective contact points, for welding. In other words, the additional material is welded on accordingly and can thus form a connection between the two extruded profiles. Thus, a reliable welding of the two extruded profiles can be realized.It is likewise advantageous if a welding additive is introduced between the respective contact points of the respective extruded profiles. In particular, the welding filler can be used, for example, as a metal sheet with an aluminum alloy. This allows reliable welding of the extruded profiles.A further advantageous embodiment provides that the two extruded profiles are designed to be welded to one another at respective contact points by means of a laser cold wire welding method. In particular, the laser cold wire welding method has proven to be advantageous when joining the extruded profiles.It is furthermore advantageous if a respective contact point at a respective corner is flattened. For example, the corner can thus be flattened accordingly over two 45° angles. The contact surface is thus reduced and, in particular, superfluous welding material from the welding process can be reliably captured / absorbed at the correspondingly free locations. Thus, in particular, an increase in the required installation space of the extruded profile can be prevented.It is likewise advantageous if the depression runs flattened up to a lower region of the depression from the contact point up to the lower region. In other words, the depression is not arranged at right angles in the extruded profile, but rather flattened as far as the lower region. Thus, a reliable welding of the extruded profiles can be realized.A further aspect of the invention relates to an arrangement having at least one extruded profile according to the preceding aspect and having a further extruded profile according to the preceding aspect.According to an advantageous embodiment of the arrangement, the extruded profile and the further extruded profile are substantially identical on the respective application side. In other words, the further extruded profile also has a corresponding depression. These can be placed against one another accordingly and welded together again at this point.Furthermore, it has proven advantageous if the extruded profile has the depression and the further extruded profile has at least one elevation which corresponds in regions to the depression. In particular, a type of poka-yoke can thus be provided, wherein the extruded profile dips into the further extruded profile and thus a relative displacement of the extruded profiles with respect to one another can already be prevented before a welding process. Thus, a reliable joining of the two extruded profiles can be realized.Yet another aspect of the invention relates to a battery housing having at least one arrangement according to the preceding aspect. In particular, the battery housing has a plurality of arrangements. In turn, corresponding receptacles can be provided in the battery housing, which are designed for arranging battery cells.Furthermore, the invention therefore also relates to an electrical energy store having the battery housing according to the preceding aspect.Yet another aspect of the invention relates to a motor vehicle having the electrical energy store according to the preceding aspect. The motor vehicle is in particular designed as an at least partially electrically operated motor vehicle or as a fully electrically operated motor vehicle.Advantageous embodiments of the extruded profile are to be regarded as advantageous embodiments of the arrangement, of the battery housing, of the electrical energy store and of the motor vehicle.Further advantages, features and details of the invention are evident from the following description of preferred exemplary embodiments and on the basis of the drawings. The features and combinations of features mentioned above in the description and the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the respectively specified combination but also in other combinations or alone without departing from the scope of the invention.The following are shown: FIG. 1 shows a schematic sectional view of an embodiment of an arrangement; FIG. 2 shows a further schematic sectional view of an embodiment of an arrangement; FIG. 3 shows a further schematic sectional view of an embodiment of an arrangement; FIG. 4 shows yet another schematic sectional view of an embodiment of an arrangement; FIG. 5 shows yet another schematic sectional view of an embodiment of an arrangement; FIG. 6 shows a yet further schematic sectional view of an embodiment of an arrangement; FIG. 7 shows yet another schematic sectional view of an embodiment of an arrangement; and FIG. 8 shows yet another schematic sectional view of an embodiment of an arrangement.In the figures, identical or functionally identical elements are provided with identical reference symbols.FIG. 1 shows a schematic sectional view of an arrangement 10. The electrical energy store is designed in particular for an at least partially electrically operated motor vehicle, not shown, or even a fully electrically operated motor vehicle.The arrangement 10 has at least one extruded profile 12 and a further extruded profile 14. The extruded profiles 12, 14 are in particular substantially cuboidal. The extruded profiles 12, 14 have in particular a cavity 16.In particular, the extruded profile 12 has a feed side 18 and the further extruded profile 14 has a further feed side 20. In particular, the extruded profiles 12, 14 are placed against one another with their respective placement sides 18, 20. For this purpose, respective contact points 22 are provided in particular. In particular at the contact points 22, the extruded profiles 12, 14 can be welded to one another.In particular, it is provided that a respective extruded profile 12, 14 has a depression 24 on the respective application side 18, 20, which depression is formed as viewed in the cross section of the application side 18, 20 toward the further extruded profile. In particular, a type of tolerance compensation region 26 can thus be created.In particular, FIG. 1 shows that the joints, in particular the contact sides 18, 20 between the respective extruded profiles 12, 14, can again be machined on both sides in order to generate the defined contact surfaces and thus minimize tolerances in the blank.The tolerance compensation region 26 between the extruded profiles 12, 14 is implemented by the specific blank geometry. As a result, only the corresponding contact points 22 have to be processed again before the laser welding process.In particular, it can be provided, for example, that in FIG. 1 the laser cold wire welding process is carried out by means of a laser cold wire welding process and, for example, an additional material 28 (FIG. 2 ).For example, the extruded profiles 12, 14 can be provided with a 6000 aluminum alloy. A potentially introduced additional material 28 can be formed, for example, as aluminum-silicon 12.In particular, FIG. 1 thus shows an optimized blank geometry of the extruded profiles 12, 14 in the region of the joints. In particular, a laser-compliant profile design is thus provided. In particular, a defined joining gap can also be set. The tolerance compensation takes place over the complete dimensional chain on the basis of the tolerance compensation regions 26 between the extruded profiles 12, 14. This enables a weight saving on account of defined material accumulations in the region of the joints. Furthermore, the conversion takes place directly on the blank of the extruded profile 12, 14. Furthermore, machining of the joints is only partially necessary, as a result of which cost and weight potential savings can be realized. The additional material 28 can be positioned in advance between the extruded profiles 12, 14 and the laser flies over the individual joints or lasers incl. Additional material is supplied or introduced simultaneously.FIG. 2 again shows a further exemplary embodiment of the arrangement 10 according to FIG. 1, wherein the additional material 28 is introduced in particular at the corresponding joints.In particular, it can be provided that the arrangement 10 in FIG. 2 is joined by means of a laser welding process, and in particular not by means of a laser cold wire welding process. The welding filler 28 may be provided as a sheet metal, for example with a 5000 aluminum alloy, and positioned between the extruded profiles 12, 14. A seam protrusion is thus prevented by means of the intermediate metal sheets.FIG. 3 shows a further schematic embodiment of an arrangement 10. This is illustrated in particular in the present case by the arrow 30. In other words, the respective contact points 22 do not have a 90° corner, but twice a 45° corner.In particular, as shown in FIG. 3, a laser cold wire welding process with additional material 28, for example aluminum-silicon 12, can thus be realized, wherein a seam protrusion is correspondingly prevented by the blank geometry.FIG. 4 shows a further schematic embodiment of an arrangement 10. In particular, the arrangement 10 according to FIG. 3 is shown, wherein in particular a welding filler 28 in the form of a wire, for example a 5000 aluminum alloy, is inserted directly between the extruded profiles 12, 14. In particular, the blank geometry of the extruded profiles 12, 14 thus prevents a seam protrusion.FIG. 5 again shows a further embodiment of an arrangement 10. In this case, it is shown in particular that the depression 24 runs in a flattened manner up to a lower region 32 of the depression 24 from the contact point 22 up to the lower region 32. This is shown in the present case in particular by a flattened portion 34.FIG. 6 again shows a further schematic embodiment of the arrangement 10.FIG. 7 shows a yet further schematic sectional view of an embodiment of the arrangement 10. In particular, a type of Poka Joke is shown in the present exemplary embodiment, so that a relative displacement of the two extruded profiles 12, 14 is prevented already during application, without the actual welding process.FIG. 8 shows a schematic sectional view of an embodiment of an arrangement 10. In this case, a corresponding depression 24 can also be provided between the extruded profiles 12, 14. In this case, in particular, the machining of the two contact surfaces is also provided.List of reference characters10 Arrangement 12 Extruded profile 14 Further extruded profile 16 Cavity 18 Application side 20 Further application side 22 Contact point 24 Depression 26 Tolerance compensation region 28 Additional material 30 Arrow 32 Lower region 34 Flattened portion 36 Raised portionReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 10 2016 125 693 A1

[0005]

Claims

Extruded profile (12) for a battery housing of a motor vehicle, which is substantially cuboidal, having at least one contact side (18) for contact with a further extruded profile (14), wherein the extruded profile (12) and the further extruded profile (14) are formed for welding to one another on the contact side (18), characterized in that the contact side (18) has a depression (24), as viewed in the cross section of the contact side (18), between two contact points (22) of the contact side (18), which contact points are formed substantially at a respective corner of the contact side (18), toward the further extruded profile (14).Extruded profile (12) according to Claim 1, characterized in that the two extruded profiles (12, 14) are designed to be welded to one another at respective contact points (22) by means of a laser welding method.Extruded profile (12) according to Claim 2, characterized in that the two extruded profiles (12, 14) are designed to be welded to one another at respective contact points (22) by means of a laser cold-wire welding method.Extruded profile (12) according to one of the preceding claims, characterized in that a respective contact point (22) is flattened at a respective corner.Extruded profile (12) according to one of the preceding claims, characterized in that the depression (24) runs in a flattened manner up to a lower region (32) of the depression (24) from the contact point (22) up to the lower region (32).Arrangement (10) having at least one extruded profile (12) according to one of Claims 1 to 5 and having a further extruded profile (14) according to one of Claims 1 to 5.Arrangement (10) according to Claim 6, characterized in that the extruded profile (12) and the further extruded profile (14) are of substantially identical design on the respective application side (18, 20).Arrangement (10) according to Claim 7, characterized in that the extruded profile (12) has the depression (24), and the further extruded profile (14) has at least one elevation (36), which corresponds in regions to the depression (24).Arrangement (10) according to one of Claims 6 to 8, characterized in that a welding filler (28) is introduced between the respective contact points (22) of the respective extruded profiles (12, 14).Battery housing having at least one arrangement (10) according to one of Claims 6 to 9.

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