CN111293244B

CN111293244B - Battery carrier with step formed in side wall of basin

Info

Publication number: CN111293244B
Application number: CN201911256681.7A
Authority: CN
Inventors: G·弗罗斯特; L·格林霍夫; T·冈瑟; C·汉丁; F·拉贝; P·祖梅劳尔
Original assignee: Benteler Automobiltechnik GmbH
Current assignee: Benteler Automobiltechnik GmbH
Priority date: 2018-12-07
Filing date: 2019-12-06
Publication date: 2023-04-07
Anticipated expiration: 2039-12-06
Also published as: CN111293244A; DE102018131375B4; DE102018131375A1

Abstract

The invention relates to a battery carrier (1) for an electric vehicle, comprising a tub and/or hood (2) having a base (3) and a circumferential side wall (4) and a flange (5) projecting outwardly from the side wall (4) and oriented outwards, characterized in that the tub and/or hood (2) is produced as a folded component from a sheet metal blank in one piece and in a material-integrated manner, wherein a step (14) is formed in at least one side of the side wall (4) in such a way that it serves as a reinforcement and/or as a connecting surface for the installation of a battery module.

Description

Battery carrier with a step formed in the side wall of the tub

Technical Field

The present invention relates to a battery carrier for an electric vehicle.

Background

The importance of electric motoricity in motor vehicle applications is increasing. Here, the electric vehicle is driven by electric energy only. In order to store electrical energy in electric vehicles, batteries, also called storage batteries, high-voltage batteries or traction batteries, are required, which have a significant volume fraction and a relatively high dead weight. Such batteries are arranged in the floor region of the motor vehicle in order to be able to store sufficient energy, for example for a range of up to 300km with the aid of the battery charge. The battery itself is mounted in the battery carrier in such a way that, on the one hand, the battery is protected from external weather conditions and, on the other hand, the substances contained in the battery are prevented from leaking into the surroundings.

For this purpose, battery housings made of plastic materials, fiber composite components or also made of metal materials are known from the prior art. The Battery carrier is also referred to as a "Battery tray".

Such battery housings are usually mounted on the motor vehicle from below and typically (ma β geblich) extend over a large part of the width of the motor vehicle and likewise over a part of the length of the motor vehicle.

The battery housing is essentially composed of a battery carrier and a housing cover.

The battery carrier features a basin-shaped housing in which a plurality of batteries are arranged. In order to ensure a corresponding rigidity of the battery carrier, a frame made of hollow profiles is provided in an outer surrounding manner, which frame can at the same time also serve as a surrounding wall of the tub. The battery carrier is arranged in an invisible bottom region of the motor vehicle. The requirements on tightness and production tolerances are high. However, there is a significant cost pressure on the manufacturing cost of the battery carrier.

The tub-shaped battery carrier of the battery case may be manufactured as a plate-shaped member. A document of this generic type is US 2016/0263639 A1.

However, in the case of bending modifications or deep drawing, problems arise here in the corner regions with regard to tightness and with regard to maximizing the utilization of the interior space.

Disclosure of Invention

The object of the present invention is to provide a battery carrier which is improved with respect to its production outlay compared to battery carriers known from the prior art.

According to the invention, this object is achieved by a battery carrier for an electric vehicle.

A battery carrier for an electric vehicle has a tub and/or a hood, wherein the tub and/or the hood each have a bottom. A circumferential side wall and a flange, which preferably projects outwardly from the side wall and is oriented towards the outside, project relative to the base. According to the invention, the tub and/or the hood are then produced as folded components in one piece and from a uniform material from a sheet metal blank, in particular from a sheet metal part, preferably from a steel sheet. Furthermore, a step is molded at least in one side of the side wall, so that the step serves as a reinforcement of the side wall and/or as a connection face for battery module mounting.

With the battery carrier according to the invention, it is therefore possible to produce the basin or the cap in a simple manner in terms of production technology. First, a sheet metal blank, in particular a sheet metal blank made of a steel alloy, is provided. It is then preferably processed using a cutting technique and subsequently processed by a folding modification technique. Thereby forming a folded member. Instead of folding, this can also be referred to as folding or hemming.

According to the invention, a step is formed in at least one side of the side wall surrounding the tub and/or the hood. The side wall can be additionally reinforced by the step portion. The step can thus be used as a dispersion surface in the event of a collision, for example a lateral pole test (Poltest), or the like. The collision energy to be introduced is thus distributed over a larger surface by the step.

However, it is also possible to provide a bearing surface or a connecting surface by the step itself in order to fix the battery module to be arranged in the battery carrier. For this purpose, the battery module can rest on the step in a form-fitting manner. Particularly preferably, a stamped nut or a blind rivet nut is introduced into the stepped portion. It is also possible to form a thread or to provide latching elements for additional mounting of the battery module, for example by means of a form-locking screw connection.

The step is preferably formed on at least two opposite sides of the circumferential side wall. In particular, the step can also be formed circumferentially over the entire side wall.

Furthermore, it is particularly preferred that the flange projecting from the side wall can have an additional fold, wherein the fold itself in turn projects, in particular, substantially orthogonally, from the flange. The fold is preferably designed to be circumferential. In this way, the fold formed on the cap can overlap the flange of the tub when the tub and/or the cap are assembled. This will improve the tightness and/or accuracy and take on a centering function when first installed.

In order to form the tub and/or the hood as a folded component, at least one connecting web is formed on a side of the side wall, said connecting web coinciding externally and internally with the adjacent side of the side wall, wherein the connecting web and the adjacent side of the side wall are joined to one another. This is performed in particular by a material-bonded joint, in particular resistance spot welding.

In order to design the pot or the cap itself to be sealed, an internally disposed, continuous weld seam, in particular an arc weld seam, is applied in the corner region, i.e. in the region in which the corner is formed by two different sides of the side wall. The weld seam preferably extends in a corner region between the base and the transition of the side wall, via corner regions of the two sides of the side wall that abut against each other, up to into the flange region. This has the following advantages: the weld does not start in the corner region itself but already in the curved region from the bottom to the side wall. This prevents breakdowns in the case of connection of the welding device and thus stretches the weld seam of constant or uniform quality up to the flange region.

Furthermore, a sealing seam consisting of sealing material can be applied in addition to the weld seam, in particular in the form of a sealing bead. The weld seam thus assumes a shape-stabilizing function. The sealing seam assumes the sealing function.

In addition, it is particularly preferred for the blank to have a sheet thickness for the production of the folded component itself. The thickness is preferably between 0.5 and 5mm, in particular between 1 and 3 mm. Furthermore, a bending radius is formed between the side walls and the base of the tub and/or the hood, wherein the bending radius is at most equal to two times the sheet thickness of the slab, in particular at most equal to 1.5 times the sheet thickness of the slab. Particularly sharp bending radii can thereby be achieved by using folding techniques. This in turn enables maximum utilization of the available interior space. For this purpose, the angle between the side wall and the base is configured in particular between 88 ° and 92 °, in particular 90 °.

In addition, it can be provided in a particularly preferred manner that the base has a protruding profile made in one piece and made of a uniform material, in particular a surface offset parallel to the base. This also enables the internal space utilization to be further maximized in the region of the bending radius, since the battery module can be pushed completely into the corner.

Furthermore, a device carrier or a device cover which additionally projects from the base can be provided in the base. Whereby the folded member is first manufactured. In a part of the base, a device cover can then be arranged. This makes it possible to achieve a simple integration of additional peripherals, for example a cooling system or also charge management or charging electronics, wherein the battery module can then be arranged in the receptacle of the battery carrier itself and the additional peripheral can then be arranged in the device cover or device carrier.

In addition, the invention preferably provides that the bottom can also be referred to as floor. The cooling system is preferably coupled to the base plate. This is formed in particular by the cooling channel plate. Preferably, the cooling channel plate has a pressed portion so as to be connected with the bottom plate to form a cooling channel system. The battery module on the base plate can rest there. A thermally conductive paste or a similar thermally conductive material can preferably be arranged between the battery module and the base plate, so that the heat generated in the battery is output by thermal conduction and then conducted further to an external cooling device via a cooling system.

Furthermore, an additional circumferential frame can be formed, which is inserted between the base plate and the hood. The frame can preferably be made of an extruded profile. The frame serves for additional reinforcement and for modular construction of the battery carrier. It is also particularly preferred that the frame acts according to the principle of a crash box in the event of a side impact and counteracts the impact energy with the deformation work.

Drawings

Additional advantages, features, characteristics and aspects of the invention are the object of the subsequent description. The preferred construction is for simplicity of understanding. The attached drawings are as follows:

figure 1 shows a battery carrier according to the invention in a perspective view,

figure 2 shows a longitudinal section along the section line II-II in figure 1,

figure 3 shows a transverse cross-sectional view according to section line III-III in figure 1,

figures 4 to 7 show corresponding exploded views during the mounting process for a battery carrier according to the invention,

figure 8 shows a perspective and a combined sectional view of a floor plate with a seated frame and hollow profiles arranged thereunder,

figure 9 shows a cross-sectional detail of an edge region of a battery carrier according to the invention,

figures 10 to 14 show the manufacture of a welded connection in the corner region with an optional sealing bead,

figure 15 shows a cap made according to the present invention,

figure 16 shows a cap made according to the present invention with an additional step in the side wall,

figure 17 showsbase:Sub>A longitudinal section according to section linebase:Sub>A-base:Sub>A in figure 16,

figure 18 shows an alternative constructive variant of the cap according to the invention,

figures 19a to 19f show different transverse cross-sectional views of the surrounding frame,

figure 20 shows a bottom perspective view of the battery carrier,

figure 21 shows a bottom detail view of a battery carrier with a high temperature protection plate,

fig. 22 shows the tub being made as a folded tub with steps integrated in the side walls.

Detailed Description

In the drawings, the same or similar members are denoted by the same reference numerals even though repetitive explanation is omitted for the sake of simplicity.

Fig. 1 shows a battery carrier 1 according to the invention in a perspective view. The battery carrier 1 has a hood 2 which is located at the top with respect to the vertical direction Z of the motor vehicle. The cap 2 itself has a base 3 and a circumferential side wall 4 and a flange 5 projecting relative to the side wall 4. The hood 2 thereby overlaps the surrounding frame 6, the frame 6 resting on the base plate 7. A hollow profile 8 is arranged below the base plate 7. These hollow profiles 8 extend substantially in the transverse direction Y of the motor vehicle and cover the battery carrier in a flat manner from below. In the center, the hollow profile 8 can likewise be interrupted by the intermediate profile 9. An exhaust system, not shown in detail, can be provided, for example, in the depression 10 below the intermediate profile 9. Laterally, a fixing tab 11 is provided. The fastening web 11 itself can be produced, for example, as an extruded profile component or as a cast component. The fastening lug 11 is screwed in itself, in particular, to the battery carrier 1 and serves for coupling to a vehicle, not shown in detail. The screw connection 12 provided for this purpose is then coupled to the surrounding frame 6.

Fig. 2 shows a longitudinal section along the section line II-II in fig. 1. It can be seen here that the cap 2 is designed as a profiled component with a base 3, a circumferential side wall 4 and, in turn, a circumferentially projecting flange 5 formed by the side wall 4. In addition, the flange 5 has a step 14 or flange, which is designed to be oriented in a projecting manner at substantially 90 ° to the flange 5. A schematically illustrated battery 16 is arranged in the interior 15 of the battery carrier 1. The battery 16 is supported on the base plate 7. A cooling passage plate 17 is provided below the floor panel 7 (with respect to the motor vehicle vertical direction Z). The cooling channel plate 17 has a recess 18, so that a cooling channel 19 is formed between the base plate 7 and the cooling channel plate 17 for conducting a fluid therethrough. The batteries 16 arranged on the base plate 7 thus discharge the generated heat onto the base plate 7, which heat is in turn discharged by the cooling medium into the cooling channel 19. The base plate 7 itself is then coupled to the frame 6. The frame 6 itself has spaced projections 20 on the lower and upper portions respectively. The gap 21 formed between the frame 6 and the base plate 7 can thus be filled with additional sealant and/or adhesive. By means of the spacer bumps 20, there is an electrically conductive contact between the frame 6 and the bottom plate 7. Likewise, the frame 6 has a spacer projection 20 with respect to the flange 5 of the cap 2. The gap 21 formed here can also be filled with an adhesive and/or a sealant.

Furthermore, with respect to the vertical direction Z of the motor vehicle, a hollow profile 8 is provided below the floor panel 7 or the cooling channel plate 17. The hollow profile 8 extends in the transverse direction Y of the motor vehicle by virtue of the course of its hollow space 23. The hollow profiles 8 can be coupled to one another via a tongue and groove with a tongue and groove system 22. The hollow profile 8 thus covers approximately the entire base in a flat manner. The hollow space 23 thus forms a chamber in order to cushion impacts from below in relation to the vertical direction Z of the motor vehicle or alternatively to absorb the resulting impact energy in order to protect the battery 16 from damage when mounted on a base.

Fig. 3 shows a transverse section according to section line III-III in fig. 1. Here too, the individual cells 16 resting on the base plate 7 can be seen, the heat generated being dissipated below the base plate 7 via cooling channels 19. The hollow profile 8 does not run continuously in the transverse direction Y of the motor vehicle, but is interrupted by an intermediate profile 9. In the recess 10 of the intermediate profile 8, for example, an exhaust system of an internal combustion engine, not shown, can be arranged. It can be seen in each case that the frame 6 surrounds the outside and couples the flange 5 of the cap 2 and the base plate 7 to one another.

Fig. 4 shows an installation process for the battery carrier 1 according to the invention. The hollow profile 8 extending in the transverse direction Y of the motor vehicle and the intermediate profile 9 are initially provided. The next place is shown to place the surrounding frame 6. In the frame 6 itself, fastening profiles in the form of receiving blocks 27 are provided for coupling to batteries, not shown in detail.

Fig. 5 shows a perspective view of a further production step, in which the cooling channel plate 17 is placed and the recesses 18 are arranged in a linear or channel-like manner in the cooling channel plate.

Fig. 6 shows a base plate 7 arranged above the cooling channel plate, which base plate constitutes a flat base for accommodating the battery 16 shown in fig. 7. It can be seen that the batteries 16 are shown coupled to the receiving block 27.

For this purpose, fig. 8 again shows a sectional view. A cooling channel 19 formed between the base plate 7 and the cooling channel plate 17 and the hollow profile 8 arranged below the cooling channel 19 can be seen.

Fig. 9 shows a detail view. A surrounding frame 6 can be seen, which has spacing lugs 20 projecting above and below with respect to the vertical direction Z of the motor vehicle. The gap 21 formed therebetween can be filled with a sealant and/or an adhesive, which is not shown in detail. The hollow profile 8 is screwed to the frame 6 from below through the base plate 7 and the cooling channel plate 17 by means of screws 28. Here, a lateral cover plate 54 can then additionally be provided, which laterally closes the hollow profile 8.

Fig. 15 shows the cap 2 in a partial view from below in the region of the formed corner. The opening is thus directed upwards with respect to the plane of the drawing. A not shown sheet metal blank is first provided and the hood 2 is then produced as a folded component by forming a sheet metal blank. For this purpose, the side wall 4 and the flange 5 are each folded or crimped and then lie in the region of the corner 30 according to fig. 10. But they are not yet connected. The circumferential side wall 4 is formed by four side walls 4 or side wall sections which adjoin one another in each case in a corner region 29. The flange 5 projects laterally with respect to the side wall 4, circumferentially on the outside.

According to the invention, the tub is designed or formed as a folded tub. Fig. 10 shows such a corner region 29 formed after folding. The sealing welding of this corner region 29 and in particular also of the lower corner 30 (the same applies to the outwardly projecting part of the flange 5) is problematic.

Fig. 11 shows a solution according to the invention here. The weld 32, which extends from the inside (but not from the corner 30, but from the offset 33 of the corner 30 in the transition region from the base 3 to the side wall 4) runs continuously via the corner 30 and the corner region 29, extends up to the outer part of the flange 5. The weld seam is produced by means of fusion welding, in particular arc welding (for example, mig).

Fig. 12 shows a further embodiment variant of the invention. The outwardly projecting regions of the flanges 5 of the two side walls 4 are first of all formed so as to be outwardly widened or project further in the corner connecting regions. The weld seam 32 is then stretched to an outer end 34 of the flange 5 which projects further outwards.

Subsequently, according to fig. 13a and 13b, the flange 5 is mechanically treated by a separating or other grinding method or mechanical method along the intersection line 35, so that a smooth, outer circumferential edge 36 of the flange 5 is obtained, which has a high connection quality even in the region of the weld seam of the flange 5. Weld errors (in particular in the flange region) are thereby avoided according to the invention.

Fig. 14 shows an additional embodiment variant. Here, sealing beads 37 are additionally applied to the weld seam 32 from the inside at least over part of the longitudinal section.

Fig. 16 shows a further embodiment variant of the independent inventive concept. The cap 2 of the battery carrier 1 is shown here. The cap is likewise produced as a folded component and has a bottom 3 and a surrounding side wall 4. The side wall 4 has four sides or side wall sections which are joined to one another in the respective corner regions 29 after the folding process. According to the invention, additional steps 38 are now respectively additionally molded on the two opposite side walls 4 (to the left and to the right with respect to the drawing plane). This is again clearly visible in the sectional view according to section linebase:Sub>A-base:Sub>A in fig. 17. The step 38 makes it possible to mount the battery module in the cap 2 or the tub. Furthermore, the step 38 reinforces the respective side wall 4. The solution according to the invention of constructing the

steps

38, 57 in the side wall 4 can be combined with any of the previously described corner joining techniques.

Fig. 18 shows a further embodiment variant of the invention. Here, steps 38 are formed on three sides of the circumferential side wall 4. A stamp nut (Stanzmuttern) 39 is arranged on or in the step 38, so that a battery or a battery module, which is not shown in detail in fig. 18, can be fixed in the tub or hood 2.

Fig. 19a to 19f show different transverse sectional views of the circumferential frame 6. Fig. 19a shows the frame 6 in a transverse sectional view. It can be seen that the spacer projections 20 are arranged not only in the upper part but also in the lower part. The spacer projections 20 can also be referred to as apron edges. This results in an outer impact surface 40 which is oriented in the transverse or longitudinal direction X, Y of the motor vehicle such that it comes into contact with the impact body first. A nominal inflection point 43 is formed in the upper flange (Obergurt) 41 and the lower flange (Untergurt) 42. These nominal inflection points 43 represent the respective deformations. A tongue groove 45 and a tongue 46 can optionally be formed on the vertical flange 44 arranged in the inner region of the Battery carrier (Battery tray). It is also possible to form a further spacer lug here, which is not shown in detail. In particular, the frame or the profile for producing the frame can be produced by extrusion.

Fig. 19b shows an alternative embodiment in which the setpoint knee 43 is not arranged in the region of the inner hollow space 47, but rather is arranged on the outside.

Fig. 19c shows an alternative, in which case the hollow space 47 is formed larger and the vertical flange 44 is formed smaller in its solid part.

Fig. 19d shows an alternative embodiment variant, in which three hollow chambers 47 are provided in each of the upper and

lower flanges

41, 42. Two hollow chambers are provided externally and one hollow chamber 47 is provided internally. The hollow chambers 47 thus serve as triggers in the event of a crash in the force direction F, in order to be able to achieve a targeted deformation or buckling.

Furthermore, the hollow space 47 is designed according to the design variant of fig. 19e in such a way that two tips 48 facing the impact surface 40 (with tips 48 arranged in the upper and lower position, respectively) extend in the direction of the impact surface 40. This also enables a targeted deformation to be influenced in the event of a collision in the force direction F.

Fig. 19f shows an alternative design variant in which a total of 5 setpoint inflection points 43 are introduced in each case in the upper flange 41 and in the lower flange 42. This enables the folding behavior to be influenced in a targeted manner. The frame 6 thus operates according to the principle of a crash box (Crashbox), in particular in the case of a lateral intrusion of an object into the battery carrier.

Fig. 20 shows the overall system of the battery carrier in a bottom view. This enables an exhaust system (not shown in detail) to be guided in the recessed region 10 (this recessed region can also be referred to as the intermediate floor tub 49).

According to fig. 21, a high temperature protection plate 50 is provided in the intermediate bottom groove 49. The heat shield 50 overlaps the respective hollow space 8 by means of a flange 51. The high-temperature protection plate 50 is then formed in the region of the central base groove 49 with two hollow chambers 52 which are triangular in cross section and a web 53 which connects the hollow chambers centrally. The high-temperature protection plate 50 is in particular constructed as an extruded component. For this purpose, the webs 53 preferably have a wall thickness of between 4mm and 5mm, in particular 4.5mm, the triangular hollow chambers 52 have a wall thickness in the range from 3.5mm to 4.5mm, in particular 4mm, and the flanges 51 have a wall thickness of from 2.5mm to 3.5mm, in particular 3 mm. The high-temperature protection plate 50 thus serves at the same time as a load path in the transverse direction Y of the motor vehicle.

Fig. 22 shows a tub 55 according to the invention. The tub 55 has a floor 56 and a surrounding side wall 4. The side walls 4 and the base 56 are produced in one piece and from a uniform material by die cutting the blank and subsequently folding the blank. The side surfaces 4v of the side walls 4 which are in the front with respect to the drawing plane and the side surfaces 4h of the side walls 4 which are in the rear are each configured smoothly themselves. The side 4l of the side wall 4 on the left with respect to the drawing plane and the side 4r of the side wall 4 on the right are configured with an additional step 57. This step 57 is shaped and serves as a bearing surface for the battery modules arranged in the tub 55 and/or for additional reinforcement. The front side 4v of the side wall 4 is turned upwards in the following manufacturing step and is then welded with the sides 4l and 4r in the region of the formed corners. Furthermore, a bending region 58 between the base plate 56 and the side wall 4 is shown. According to the invention, the bending region is produced with a particularly small bending radius in relation to the thickness or wall thickness W of the sheet metal blank. This is possible based on folding techniques.

The tub 55 shown here can also be used as a hood in the exemplary embodiment according to fig. 1. Furthermore, in this case it is conceivable for the step to reinforce the cap itself and also the battery carrier in the installed state. As a result, the hollow profile of the frame 3 can be made lighter and/or thinner or even be eliminated completely.

List of reference numerals

1. Battery carrier

2. Cover-shaped piece

3. Bottom part

4. Side wall

Front side of 4v sidewall

Rear side of 4h side wall

Left side of 4l side wall

Right side of 4r side wall

5. Flange

6. Frame structure

7. Base plate

8. Hollow section bar

9. Intermediate section bar

10. Depressed region

11. Fixing connecting piece

12. Screw connection

14. Step part

15. Inner space

16. Battery with a battery cell

17. Cooling channel plate

18. Recess of cooling channel plate

19. Cooling channel

20. Spacer boss

21. Gap

22. Tongue-and-groove and tongue plug-in system

23. Hollow cavity

27. Receiving block

28. Screw nail

29. Corner region

30. Corner part

31. Part of the flange

32. Weld seam

33. Offset part

34. Outer end part

35. Intersecting line

36. Outer edge

37. Sealing bead

38. Step part

39. Punching nut

40. Impact surface

41. Upper flange

42. Bottom flange

43. Rated inflection point

44. Vertical flange

45. Tongue-and-groove

46. Tenon head

47. Hollow cavity

48. Top part

49. Middle bottom groove

50. High-temperature protection plate

51. Flange

52. Triangular hollow cavity

53. Tab

54. Cover plate

55. Basin-shaped member

56. Base plate

57. Step part

58. Bending zone

Z vertical direction of motor vehicle

Y Motor vehicle transverse Direction

Direction of Z force

Wall thickness of W

Claims

1. Motor vehicle battery carrier having a tub and/or hood (2) with a bottom (3) and a surrounding side wall (4) and a flange (5) projecting outwardly from the side wall (4), characterized in that the tub and/or hood (2) is produced as a folded component from a sheet metal blank in one piece and from material, the sheet metal thickness of which is between 1mm and 3mm, a step being formed on at least one side of the side wall (4) in such a way that it serves as a reinforcement and as a connecting surface for the installation of battery modules, a continuous weld seam (32) being provided internally in the corner region of two adjacent side walls (4) being applied, the flange (5) having an additional fold edge, which projects beyond the flange (5).

2. The motor vehicle battery carrier as claimed in claim 1, characterized in that the step (14) is formed on at least two opposite sides of the circumferential side wall (4).

3. The vehicle battery carrier as claimed in claim 2, characterized in that the step (14) is formed around the side wall (4).

4. The motor vehicle battery carrier as claimed in claim 1, characterized in that a stamped nut (39) or a rivet nut is introduced into the step (14) or is threaded or is fitted with latching elements for mounting the battery module.

5. The motor vehicle battery carrier as claimed in claim 1, characterized in that the fold protrudes essentially orthogonally from the flange (5) and is configured circumferentially.

6. The motor vehicle battery carrier as claimed in claim 1, characterized in that at least one joining web is formed on one side of the side wall (4), which joining web coincides externally with the adjacent side of the side wall (4), and which joining web and the adjacent side of the side wall (4) join one another.

7. The automotive battery carrier of claim 1, wherein the weld (32) is an arc weld.

8. The motor vehicle battery carrier as claimed in claim 7, characterized in that the weld seam (32) extends from a region between the transition from the floor (3) to the side wall (4) via the corner regions (29) of the two side walls (4) lying against one another into the flange region.

9. The motor vehicle battery carrier as claimed in claim 1, characterized in that sealing seams made of sealing material are applied in the corner regions of two adjacent side walls (4) in addition to the welding seams (32).

10. The automotive battery carrier of claim 9, wherein the sealing seam is a sealing bead (37).

11. The motor vehicle battery carrier according to claim 1, characterised in that the tub and/or the hood (2) has a bending radius between the side wall (4) and the floor (3), wherein the bending radius is at most equal to twice the sheet metal thickness of the sheet metal blank, and a bending angle of between 88 ° and 92 ° is formed between the side wall (4) and the floor (3).

12. The vehicle battery carrier as claimed in claim 11, characterized in that the bending radius is at most equal to 1.5 times the sheet thickness of the blank and a bending angle of 90 ° is formed between the side wall (4) and the base (3).

13. Motor vehicle battery carrier as claimed in claim 1, characterized in that the bottom (3) has a protruding molding made in one piece and of uniform material.

14. The motor vehicle battery carrier as claimed in claim 13, characterised in that the protruding profile is a face offset parallel to the base (3).

15. The motor vehicle battery carrier according to claim 1, characterized in that a floor plate (7) is provided, which has a cooling system arranged below it or above it in the installation direction, and the hood (2) rests with a flange (5) on the floor plate (7), wherein the battery modules in the motor vehicle battery carrier (1) rest on the floor (3) and/or are arranged in the hood (2).

16. The motor vehicle battery carrier as claimed in claim 15, characterized in that a surrounding frame (6) is inserted between the floor panel (7) and the hood (2).

17. The motor vehicle battery carrier as claimed in claim 16, characterized in that the frames (6) each have a spacer for providing a circumferential seal, oriented toward the floor (7) and/or the flange (5) of the hood (2).

18. The vehicle battery carrier according to claim 15, characterized in that a cooling channel plate (17) is arranged below or above the floor panel (7) such that a cooling channel system is formed between the floor panel (7) and the cooling channel plate (17).

19. The motor vehicle battery carrier as claimed in claim 18, characterized in that a hollow profile (8) is provided below the floor panel (7) and below the cooling channel plate (17) and extends transversely to the direction of travel; and/or an anti-drill plate (24) is arranged at a distance from the cooling channel plate (17).

20. Motor vehicle battery carrier according to claim 18, characterized in that a hollow profile (8) is provided below the floor panel (7) in the installed position of the motor vehicle battery carrier (1) on the vehicle, extending transversely to the direction of travel below the cooling channel plate (17).