Battery holder for a vehicle

Abstract

The disclosure relates to a battery holder for the receiving of a plurality of battery modules in an electrically driven vehicle. The battery holder may include a plurality of juxtaposed module receptacles, wherein each module receptacle is configured to receive the battery module, and a profile wall that defines the plurality of module receptacles, wherein a heat exchanger is configured to temper the battery modules is formed in the side wall, wherein the heat exchanger comprises a plurality of hollow channels that extend along the module receptacles.

Claims

1. A battery holder for receiving a plurality of battery modules in an electrically driven vehicle, comprising: a plurality of juxtaposed module receptacles, wherein each module receptacle is configured to receive a battery module of the plurality of battery modules; and a profile wall that defines the plurality of juxtaposed module receptacles, wherein a heat exchanger configured to temper the plurality of battery modules is formed in the profile wall, wherein the heat exchanger comprises a plurality of hollow channels that extend along the plurality of juxtaposed module receptacles, wherein the plurality of juxtaposed module receptacles are separated from each other by walls and either form one or more of insertion cavities, recesses, receiving spaces, or a combination thereof for the plurality of battery modules, wherein the profile wall is integrally formed as an extrusion profile, wherein the profile wall comprises lateral hollow channel openings, wherein two opposing hollow channel openings respectively define one hollow channel, and wherein the lateral hollow channel openings of adjacent hollow channels are fluidly connected to each other in series or in parallel, in a fluid-tight manner, wherein the lateral hollow channel openings of the adjacent hollow channels are each connected by a fluid-carrying connection to fluidly connect the adjacent hollow channels in series or in parallel, and wherein the fluid-carrying connection is formed by a fluid-carrying pipe coupling, wherein the fluid-carrying pipe coupling comprises two fluid-carrying plug-in fittings that are connected in a fluid-tight manner, wherein each plug-in fitting is connected with a hollow channel opening in a plug-in or force-locking manner.

2. The battery holder according to claim 1, wherein the plurality of hollow channels are formed as hollow chambers in the profile wall.

3. The battery holder according to claim 1, wherein the battery holder comprises a central fluid distributor configured to feed multiple hollow chambers in parallel with fluid, wherein the central fluid distributor comprises a central feeder with one end connected in parallel with the plurality of hollow channels, and wherein the central fluid distributor comprises a central discharge connected in parallel with opposing ends of the plurality of hollow channels.

4. The battery holder according to claim 1, wherein the plurality of hollow channels are configured for conduction of a fluid.

5. The battery holder according to claim 1, wherein the heat exchanger comprises an integral meandering pipe that extends through the plurality of hollow channels and is configured for conduction of a fluid.

6. The battery holder according to claim 5, wherein in each hollow channel, a respective pipe support is formed and configured to support a meandering pipe section that extends through a respective hollow channel.

7. The battery holder according to claim 1, wherein hollow channels of the plurality of hollow channels extend parallel to one another.

8. The battery holder according to claim 1, wherein the plurality of hollow channels comprise a circular cross section and are extruded in the profile wall.

9. The battery holder according to claim 1, wherein the profile wall comprises a base plate and wherein hollow channels of the plurality of hollow channels are disposed at a distance from one another on the base plate or below the base plate, or wherein the profile wall comprises the base plate and a cover plate, wherein hollow channels of the plurality of hollow channels are displaced between the base plate and the cover plate.

10. The battery holder according to claim 9, wherein the hollow channels extend at a distance from one another on the base plate, and wherein base plate sections of the base plate between adjacent hollow channels form bent portions for a bend of the profile wall.

11. The battery holder according to claim 1, wherein the heat exchanger forms a vaporizer.

12. The battery holder according to claim 1, wherein adjacent battery modules or module receptacles are separated from each other by a separating web.

13. The battery holder according to claim 1, wherein the profile wall forms a base of the battery holder or a side wall of the battery holder.

14. The battery holder according to claim 1, wherein the plurality of hollow channels comprise elastically deformable vertical walls.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Examples of the principles of the present disclosure are described referring to the accompanying figures.

(2) FIGS. 1A, 1B show cross sections of a battery holder in an example;

(3) FIGS. 2A, 2B show examples of the profile wall;

(4) FIGS. 3A, 3B, 3C show the battery holder in an example;

(5) FIG. 4 shows the profile wall in an example;

(6) FIGS. 5A, 5B show the battery holder in an example;

(7) FIG. 6 shows the profile wall in an example;

(8) FIGS. 7A, 7B, 7C show the battery holder in an example;

(9) FIG. 8 shows a meandering pipe in an example;

(10) FIGS. 9A, 9B show pipe supports;

(11) FIG. 10 shows an extrusion-mold-matrix in an example;

(12) FIGS. 11A, 11B, 11C, 11D, 11E,11F, 11G, 11H, 11J show the battery holder in several examples;

(13) FIGS. 12A, 12B show a battery holding system in an example;

(14) FIG. 13 shows an extrusion-mold-matrix in an example;

(15) FIGS. 14A, 14B show a battery holding system in an example.

(16) FIG. 15 shows the profile wall in an example; and

(17) FIG. 16 shows the profile wall in an example.

DETAILED DESCRIPTION OF THE DRAWINGS

(18) FIGS. 1A, 1B show cross sections of a battery holder 100 for the receiving of a plurality of battery modules 101-1 to 101-6. The battery modules 101-1 to 101-6 are, for example, disposed in a row. Additional battery modules 101, for example, additional battery modules 101-7, 101-8 can be disposed behind the battery modules 101-1 to 101-6. Thereby a matrix arrangement with columns and rows of battery modules 101 is created.

(19) The battery holder 100 comprises a profile wall 103, which defines the plurality of battery modules 101. The profile wall 103 can, for example, be formed as a bottom wall.

(20) A heat exchanger 105 for the tempering of the module receptacles 101 is formed in the profile wall 103, wherein the heat exchanger 105 comprises a plurality of hollow channels 107, for example, hollow channels 107-1 to 107-6, which extend along the battery modules 101.

(21) The hollow channels 107 are disposed on a plate 108, which forms a base plate 109 of the battery holder 100 in the examples shown in FIGS. 1A, 1B. The plate 109 can have an additional function and serve as an underrun protection device.

(22) The hollow channels extend, for example, rectilinearly adjacently on the plate 109, whereby an arrangement of parallel hollow channels 107 is created. Thereby, each hollow channel 107 is provided for one row or one column of module receptacles 101 respectively, as shown in FIGS. 1A, 1B. In an example the plate 109 is an element of the profile wall 103.

(23) The hollow channels 107 can be disposed at a distance from each other, wherein between the hollow channels 107 bend sections 111 of the plate 109 are disposed. Thereby, the profile wall 103 can be bent at the bend sections 111 without deforming the hollow channels 107.

(24) The module receptacles 101 are separated from each other by separating walls 113, for example separating walls 113-1 to 113-7 and form niches respectively troughs for single battery modules. The separating walls 113 are integrally attached to the hollow channels 107 on the base plate 109 in the extension direction of the hollow channels 107. The separating walls 113 can further extend transversely to the extension direction of the hollow channels and are then, for example, integrally attached on the hollow channels 107. Instead of or in addition to this type of attachment supports can be provided, which fix the separating walls 113 to the base plate or the side walls 117.

(25) Each hollow channel 107 is defined by a juxtaposed hollow channel opening 115-1 and 115-2. The hollow channel opening 115-1 and 115-2 are disposed on each side of the profile wall 103, wherein the hollow channel opening 115-1 and 115-2 open laterally of the profile wall 103.

(26) The battery holder 100 is laterally defined by the side walls 117 to 117-4.

(27) In an example the battery holder can further comprise a cover 119, which can be placed on the battery holder 100 and connected to the battery holder 100 in a fluid-tight manner.

(28) In an example the battery holder 100 comprises fluid carrying connections 121 with fluid carrying connections 121-1 to 121-2, which fluidly connect adjacent hollow channels 107 in parallel or in series. With a flow connection of the hollow channels in a row adjacent hollow channel openings 115 are fluidly connected, so that the fluid can flow from one hollow channel 107 to the next hollow channel 107. With a parallel flow connection the hollow channel openings 115-1 are fed in parallel by the fluid carrying connections 121-1 with fluid that exits at the hollow channel openings 115-2 and is drained by the fluid carrying connections 121-2. For this purpose a fluid distributor can be used, which is not shown. The fluid distributor comprises a central feeder, which at one end is connected in parallel to multiple hollow channels 107, and a central discharge, which is connected in parallel with opposite ends of the hollow channels 107.

(29) The hollow channels 107 are facing the battery modules 101 and in one example form a bottom surface for the receiving of the battery modules.

(30) FIG. 2A shows a profile wall 103 from FIGS. 1A and 1B in a cross section in an example. The walls 128, for example vertical walls or side walls of the hollow channels 107 extend in a straight manner, whereby an increased rigidity of the hollow channels can be achieved.

(31) FIG. 2B shows a profile wall 103 from FIGS. 1A and 1B in a cross section in a further example. The walls 128 of the hollow channels 107 are, for example, curved in a convex or concave manner. The walls 128 can optionally be executed thinner that the remaining sections of the hollow channels 107. Thereby, a spring action respectively an elasticity of the walls 128 of the hollow channels can be achieved.

(32) In FIGS. 3A, 3B, 3C the battery holder 100 is shown in an example, in which the profile wall 103 is arranged upside down. The plate 109 is, in contrast to the examples shown in FIGS. 1A and 1B, facing the battery modules 101 and can serve as a bottom surface.

(33) In the examples shown in FIGS. 1A, 1B as well as 3A, 3B, 3C the profile wall 103 is formed as a bottom wall of the battery holder 100. The profile wall 103 can however form one or multiple side walls.

(34) In an example, which is exemplary shown in FIG. 3C, the battery holder 100 can comprise an additional under protection plate 130, which is disposed below the hollow channels 107 and which is provided as an underrun protection device. The under protection plate 130 can be consolidated from synthetic material, GFK or metal. The under protection plate 130 can further be attached to the sidewalls 117, which, for this purpose, in comparison to the examples shown in FIGS. 3A and 3B can be elongated respectively pulled down.

(35) FIG. 4 shows a profile wall 103 from FIGS. 3A and 3B in a cross section. The profile wall 103 is preferably formed as one piece from a single extrusion profile.

(36) In the example shown in FIGS. 5A and 5B the hollow channels 107 of the profile wall 103 form side walls 117 of the battery modules 101. Thereby, the battery modules are cooled laterally.

(37) The battery holder 100 comprises, for example, a fluid distributor 503, with a central feeder 503-1 for the parallel feeding of the hollow channels with fluid and a central discharge 503-2 for the receiving of the fluid. The fluid distributor 503 can in an analogous manner be provided in the examples shown in FIGS. 1A and 1B.

(38) As observable in FIG. 5B in the longitudinal section in the area of a side wall 117, the hollow channels 107 can be fluidly connected in series by not shown pipe couplings.

(39) Optionally, the protection plate 505 can be provided as an underrun protection device, which is disposed under the plate 109 and is coupled with the battery holder 100 and/or with the body of the motor vehicle.

(40) In FIG. 6 an example of the profile wall 103 from FIGS. 5A and 5B is shown. In contrast to the example shown in FIG. 3 the hollow channels 107 are rotated by 90° and thereby form sidewalls 117 of the module receptacles 101 respectively the battery holder 100.

(41) In an example the hollow channels 107 form fluid channels and can be directly fed with fluid like gas or liquids. The hollow channels are connected by the plate 109, especially in an integral manner or from a single extrusion profile. Alternatively, two or three profile walls are integrally joined in a fluid-tight manner.

(42) In a further example the hollow channels are provided for the receiving of a fluid conduit, for example, a meandering pipe. In case of a frontal or lateral impact the side walls 117 serve to forward the load and to protect the battery modules from deformation.

(43) In FIGS. 7A, 7B and 7C an example of the battery holder 100 with a meandering pipe 701 is shown, which is flattened and bent several times and supported by the hollow channels 107 in form of pipe supports 703-1 to 703-6 for the support of the meandering pipe 701.

(44) In an example the pipe supports 701-1 to 703-6 are resiliently formed, wherein the meandering pipe 701 is resiliently mounted. Thereby, a further suspension of the battery modules 101 with regard to the base plate 109 can be achieved.

(45) In FIG. 8 an exemplary meandering pipe 701 is shown, wherein due to space limitations rectilinear extending pipe sections are shown shortened.

(46) In an example the meandering pipe sections 701-1 of the meandering pipe 701, which extend through the hollow channels, are flattened or oblate, whereby a larger heat transfer surface to the battery modules is created. However, on the inlet and outlet side the meandering pipe 701 is round, whereby the feeding of the meandering pipe 701 with fluid can be simplified.

(47) The meandering pipe 701 can be integrally formed and comprise bend sections 701-2, which extend outside of the hollow channels 107.

(48) The meandering pipe 701 can however formed from a plurality of pieces from the bend sections 701-1, which are fluidly connected with each other in parallel or in series by fluid connectors.

(49) The pipe supports 703-1 to 703-6 are preferably integrally and substance uniformly formed with the base plate 109 respectively with the profile wall 103 and vaulted in the middle to receive the pipe sections 701-1.

(50) In the example shown in FIGS. 9A and 9B the pipe supports 901 are formed in the plate 109. The pipe supports 901 comprise rounded arms 901-1, 901-2, which define receptacles for the meandering pipe 701 respectively its pipe sections 701-1.

(51) The battery holder 100 cab be stacked on top of each other, whereby vertical battery holding systems are created.

(52) FIGS. 11A, 11B, 11C, 11D, 11E, 11F, 11G, 11H and 11J show examples of the battery holder 100.

(53) The profile wall 103 is provided as a hollow chamber profile with hollow chambers 106, in which hollow channels 107 are formed, which are penetrable by a fluid—The hollow channels 107 preferably have a circular cross section.

(54) The hollow channels 107 are disposed between superimposed walls 1101, 1193, for example a base wall 1101 and a cover wall 1103 and connected to these in a heat conducting manner.

(55) As indicated in FIG. 11A the hollow channel 107 can be directly joined with the wall 1103 and the wall 1101 with a rectilinear web 1105. The web 1105 extends radially in the direction of the lower wall 1101. In this way the hollow channel 107 is closer to the upper wall 1103, which is disposed facing the battery module 101.

(56) As indicated in FIG. 11B the hollow channel 107 can be directly joined with the wall 1103 and the wall 1101 with the webs 1107-1, 1107-2 and 1107-3 and joined with the wall with the web 1105. The web 1105 extends radially in the direction of the lower wall 1101 and is implemented shorter than in the examples shown in FIG. 11A. The webs 1107-1, 1107-2 and 1107-3 extend fan-like in the direction of the upper wall 1103, wherein the webs 1107-1 and 1107-3 are disposed at an angle towards each other. The web 1107-3 however extends radially in the direction of the upper wall 1103.

(57) On both sides of the hollow channel 107 additional reinforcing webs 1109, 1111 can be disposed, which join like walls 1101, 1101 in the hollow chamber, as shown in FIG. 11C. In this way an even higher rigidity of the battery holder can be achieved.

(58) The hollow channels 107 can be extruded with the profile wall 103 as well as with the webs 1105, 1107-1, 1107-2, 1107-3, 1109, 1111. In this way the profile wall 103 can be realized in a extrusion process.

(59) The hollow channels in all examples can be formed as hollow chambers 107 or comprise hollow chambers 106 and form side wall 103 or side wall 117 in the finished formed condition. The profile wall 103 can further be provided as a base or intermediate base for the receiving of a plurality of battery modules.

(60) As indicated in FIG. 11D the hollow channel 107 can be directly joined with the wall 1103. The hollow channel 107 and the wall 1101 are set apart from each other and thereby are not connected. Additionally, the profile wall 103 is set apart from the wall 1101 and is connected with the wall 1101 by webs 1125, 1127.

(61) The profile wall 103 comprises an aperture 1129 which is facing away from the module receptacle 101. Thereby, the hollow chamber 106 can be unilaterally opened. In this way the heat can be efficiently dissipated from the hollow chamber 106 towards the outside.

(62) The hollow channel 107 is set apart by the distance a from the wall 1101. The distance A is preferably smaller than the height H of the hollow chamber 106.

(63) FIG. 11E shows a cross section of a schematic drawing of the battery holder 100 with a formed-on heat exchanger structure 109. The hollow channels 107-1 to 107-3 are in each case disposed in a hollow chamber 106. The hollow channels 107-1 to 107-3 comprise a circular cross sectional area, wherein the wall 1123 which defines the hollow channels 107-1 to 107-3 on the low side follows the cross section of the hollow channels 107-1 to 107-3 and accordingly is formed in a circular shape. The section plane of the drawing is disposed transversely to the longitudinal direction of the hollow channels 107-1 to 107-3. The hollow channels 107-1, 107-2, 107-3 are set apart from each other as well as from the wall 1101 of the profile wall 103.

(64) In an example the hollow channels 107-1, 107-2 and 107-3 are formed by extrusion of a light metal alloy.

(65) FIG. 11F shows a cross section of a schematic drawing of the battery holder 100, which comprises a formed-on heat exchanger structure 109. The hollow channels 107-1, 107-2 are in each case disposed in a hollow chamber 106. The hollow channels 107-1, 107-2 have a rounded flattened cross section, wherein the wall 1123, which defines the hollow channels 107-1, 107-2 follows the cross section of the hollow channel 107 and accordingly is shaped rounded. The walls 1123 are formed into the interior of the hollow chambers 106 and form web-like, especially cylindrical structures, in which the hollow channels 107 are formed. The section plane of the drawing is disposed transversely to the longitudinal direction of the hollow channels 107-1, 107-2.

(66) The cross sectional shape of the hollow channels 107-1, 107-2 shown in FIG. 11F yield a reduced cross sectional area compared to a circular cross section and thereby a reduced receivable fluid volume in the hollow channels 107-1 and 107-2. Thereby, a weight optimization of the battery holder 100 during operation is achieved.

(67) At the end fastening tabs 1131, 1133 for the hooked respectively integral coupling with another profile wall 103 respectively with another hollow chamber profile with integrated heat exchanger structure are provided.

(68) FIG. 11G shows a schematic drawing of the battery holder 100, which similarly to the examples shown in FIGS. 11E and 11F comprises a formed-on heat exchanger structure 109. The hollow chamber openings 115 comprise a circular cross sectional area, wherein the section of the cover wall 1103, which defines the hollow channels 107-1, 107-2 follows the cross section of the hollow profile opening 115 at the front face of the battery holder and accordingly is formed in a circular shape. With the circular form of the section of the cover wall 1103 the planar profile of the cover wall 1103 is interrupted in the area of the hollow channels 107-1, 107-2 by a curvature.

(69) In an example the hollow channels 107-1, 107-2 have a continually changing cross section along a longitudinal axis 1113 of the hollow channels 107-1, 107-2. Especially in the first section of the hollow channels 107-1, 107-2 along the longitudinal axis a transformation of the circular cross section to the rounded cross section according to the example shown in FIG. 11F is effected. Following this first section of the hollow channels 107-1, 107-2 a planar profile of the cover wall 1103 results again and the cross section of the hollow chambers 107-1, 107-2 is according to the example shown in FIG. 11 formed rounded and flattened.

(70) This way of the forming of the hollow channel openings 115 enables the combination of a circular cross section of the hollow channel openings 115 with a rounded shaped cross section of the hollow channels 107-1, 107-2. A circular cross section of the hollow channel openings 115 is especially advantageous for the receiving of or connection with a pipeline, a tube or a screw-in or plug-in connector. A complexly formed cross section of the hollow channels 107-1, 107-2 however can be advantageous for the heat transport between the cover wall 1103 and the medium in the hollow channels 107-1, 107-2. Through combination of the cross section forms both of the aforementioned advantages can be combined.

(71) FIG. 11H shows a cross section of the hollow channel 107 according to the example shown in FIG. 11G. The section plane of the drawing is disposed parallel to the longitudinal axis 1113 of the hollow channel 107. The hollow channel opening 115 has a circular cross section area, which in a first section of the hollow channel 107 along the longitudinal axis 1113 of the hollow channel 107 is formed into a complexly shaped cross sectional area according to the example shown in FIG. 11F.

(72) Furthermore, FIG. 11H shows an especially circular form tool 1115, which penetrates and plastically deforms the first section of the hollow channel during a process. In particular, such a circular cross section of the hollow channel opening 115 is formed, which in the first section of the hollow channel 107 continually transitions into the original cross sectional shape of the hollow channel 107.

(73) In an example the cover wall 1103 is joined to the base wall 1101 in the area of the hollow channel 107. Thereby, the hollow channel 107 is defined by the base wall 1101. It is also possible that the base wall 1101 and the wall 1123 are spaced apart from each other to create a buffer chamber to the road or an insulation to the hollow channel 107.

(74) FIG. 11J shows a cross section of the profile wall 103 with a hollow channel 107, wherein the cover wall 1103 between the hollow channel and the module receptacle 101 on the side of the hollow channel comprises a plurality of webs 1119, which are formed in direction of the longitudinal axis 1113 of the hollow channel 107 and extend into the hollow channel 107. The hollow channel 107 comprises a slot-shaped cross section and comprises laterally an additional hollow channel 1121, which circumferentially comprises an aperture, which can extend across the whole profile wall 103 in the direction of the longitudinal axis 1113 of the hollow channel 107.

(75) In an example the further hollow channels 1121 form axial bolting points for the attachment of a fluid collector. The fluid collector can be connected with the battery holder 100 respectively with the profile wall 103 by screw connections in the further hollow channels 1121, so that an in particular fluid-tight connection between the hollow channel 107 and the fluid collector can be created.

(76) The further hollow channels 1121 form a structure on the hollow channel 107, which provides additional rigidity to the profile wall 103.

(77) The contact surface between the medium and the hollow channel 107 and the profile wall 103 is enlarged by the webs 1119, so that the surface, which is available for the heat transport between the profile wall and the medium in the hollow channel 107, can be advantageously enlarged. Additional complex forms of the outer wall 1123 of the hollow channel 107 are imaginable, which can further enlarge the surface.

(78) The circular, especially rotational symmetric hollow channel opening 115 can advantageously be used for the connection of a connection element, especially a pipe coupling of a tube or pipe. Thus, in particular, a sealed connection can be achieved, for example, by introducing a seal between the hollow channel 107 or the hollow channel opening 115 and the connection element.

(79) The webs 1119 can be extruded with the profile wall 103 using a higher strength alloy, so that advantageously a simultaneous manufacturing of the complete battery holder 100 is possible and the manufacturing time till completion of the battery holder 100 can be reduced.

(80) There can be a distance, in particular an insulation distance, between the outer wall 1123 of the hollow channel 107 and the base wall 1101. Thereby, the heat exchanger structure 109 can be insulated from the base wall 1101, especially thermally insulated.

(81) FIGS. 12A and 12B show a battery holding system comprising stacked one above another battery holders 100 according to the example shown in FIGS. 1A and 1B. The battery holders 100 are, for example, integrally joined to each other.

(82) FIGS. 14A and 14B show a battery holding system comprising stacked one above another battery holders 100 according to the example shown in FIGS. 5A and 5B. The battery holders 100 are, for example, integrally joined to each other.

(83) For the production of the battery holder 100 from the FIGS. 1A and 1B a profile wall 103 can be provided as an extrusion profile formed in an extrusion die 1001 indicated in FIG. 10. Here, the plate 109 is bent wave-like at the bend sections 111 and can subsequently be pulled apart. For the production of the profile wall 103 multiple extrusion profiles 1001 having a smaller diameter than shown in FIG. 10 can be extruded and joined to each other in an integral or fluid-tight manner.

(84) For the production of the battery holder 100 from the FIGS. 3A and 3B a profile wall 103 can be provided as an extrusion profile formed in an extrusion die 1101 indicated in FIG. 13. Here, the plate 109 is circularly bent with curvatures at the bend sections 111 and can subsequently be pulled apart. For this purpose the plate 109 can be extruded cohesively and subsequently slotted.

(85) For the production of the profile wall 103 multiple extrusion dies 1001 with a smaller diameter than shown in FIG. 10 can be extruded and joined to each other, for example, in an integral or fluid-tight manner.

(86) The hollow channels 107 can be formed as hollow chambers and form the profile wall 103 or the side wall 117 in a finished formed condition. The profile wall 103 can further be provided as a base or intermediate base for the receiving of a plurality of battery modules.

(87) In an example the hollow channels 107 comprise wall thicknesses, which are equal to or smaller than 2 mm in the examples with module base cooling, FIGS. 1A, 1B as well as in the examples with side wall cooling according to FIGS. 13 and 14.

(88) In an example the hollow channels 107 can comprise locally embossed walls, for example, for a wall surface enlargement respectively for a reduction of flow turbulence.

(89) In an example the hollow channels 107 can be formed as a reinforcement strut, which is inherently rigid to shear, a bending-resistant reinforcement strut or fastening strips with wall thicknesses of, for example, 2 mm.

(90) The hollow channels 107 can further be formed with a wave-like or meander-shaped cross section in the initial profile during the production.

(91) In an example the base 109 comprises a projecting base surface, which is advantageous for the mounting of the side walls, the cover respectively cover trough as well as the fluid distributor.

(92) In an example support struts can be integrated transversely to the longitudinal axis of each hollow channel in the plate 109 in the underrun protection device. Supporting struts may also be provided transversely to the hollow channel longitudinal axis. Thereby, the material properties are, for example, Rm>250 MPa, preferably RM>300 MPa in case of an aluminum alloy of the series 5000 or 6000 or 7000.

(93) FIG. 15 shows a cross sectional view of a schematic drawing of the profile wall 103 of the battery holder 100 with a heat exchanger 105. The hollow channels 107 are in each case disposed between the base wall 1101 and the cover wall 1103 of the base plate 109. The hollow channels 107 comprise a rectangular cross sectional area and are separated by rectilinear webs 1509, which connect the base wall 1101 and the cover wall 1103.

(94) The profile wall 103 can have a meandering form comprising bent sections 1501-1, 1501-2, 1501-3, 1501-4 and straight sections 1503-1, 1503-2, 1503-3, 1503-4. The side walls 117-1, 117-2 comprise additional hollow chambers 1505-1, 1505-2, 1505-3, 1505-4, 1507-1, 1507-2, 1507-3, 1507-4. The section plane of the drawing is disposed transversely to the longitudinal direction of the hollow channels 107. The height of the rectilinear webs 1509 defines the distance between the base wall 1101 and the cover wall 1103. The bent sections 1501-1, 1501-2, 1501-3, 1501-4 can be pulled apart to achieve a planar battery holder 100. In particular the example shown in FIG. 15 is the extruded form of the battery holder 100. In a further process step, the extruded form of the battery holder 100 can be pulled apart to yield the planar profile wall 103 according to the example shown in FIG. 16.

(95) FIG. 16 shows a cross sectional view of a schematic drawing of the profile wall 103 of the battery holder 100 with a heat exchanger 105. The hollow channels 107 are in each case disposed between the base wall 1101 and the cover wall 1103 of the base plate 109. The hollow channels 107 comprise a rectangular cross sectional area. The hollow channels 107 are separated by rectilinear webs 1509 which connect the base wall 1101 and the cover wall 1103.

(96) The battery holder 100 comprises a plurality of juxtaposed module receptacles 101-1, 101-2 which are connected to the cover wall 1103 of the profile wall 103. Each module receptacle 101-1, 101-2 is provided for the receiving of a battery module. The module receptacles 101-1, 101-2 are separated from each other by separating walls 113-1, 113-2.

(97) The separating walls 113-1, 113-2 are integrally attached to the cover wall 1103 of the base plate 109 in the extension direction of the hollow channels 107. The side walls 117 1, 117-2 comprise additional hollow chambers 1505-1, 1505-2, 1505-3, 1505-4, 1507 1, 1507-2, 1507-3, 1507-4. The section plane of the drawing is disposed transversely to the longitudinal direction of the hollow channels 107.