WO2021099583A1

WO2021099583A1 - Battery housing for a motor vehicle

Info

Publication number: WO2021099583A1
Application number: PCT/EP2020/082916
Authority: WO
Inventors: Alexander GÜNTHER
Original assignee: Kirchhoff Automotive Deutschland Gmbh
Priority date: 2019-11-22
Filing date: 2020-11-20
Publication date: 2021-05-27
Also published as: DE102019131598B3

Abstract

The invention relates to a battery housing for a motor vehicle comprising at least one battery module (5) and a frame (R) surrounding the battery module (5) and secured to the battery module (5). The battery module (5) is connected to the frame (R) on a first side (6, 6.1) via at least one fixed bearing and on a second side (7, 7.1) via at least one floating bearing, wherein the battery module (5) is interlockingly fixed in the z-direction relative to the frame (R) via the at least one floating bearing and a relative movement between the frame (R) and the battery module (5) is possible as a result of a deformation of the frame (R).

Description

Battery case for a motor vehicle

The invention relates to a battery housing for a motor vehicle with at least one battery module and a frame surrounding the battery module, on which the battery module is fixed.

Electric or hybrid motor vehicles are equipped with battery modules to enable electric ferry operation. The battery module belonging to the vehicle or a multiplicity of individual battery modules are arranged in a battery housing. Such a battery housing comprises a frame which encloses the battery modules in the x-y plane of a vehicle. The frame also serves to protect the battery modules from mechanical damage. The battery modules are fixed to the frame within the battery housing.

Battery modules, especially floch-voltage battery modules, such as those used for the motor vehicles in question, are extremely sensitive to deformation: they pose an increased risk if they are damaged. The crash behavior of a battery housing is therefore of crucial importance for overall safety. The aim is to ensure that the battery modules are not deformed or not deformed to any significant extent, even in the event of a crash, in order to reduce the dangers emanating from a damaged battery module.

To increase the crash performance of a battery housing, it is known to reinforce and stiffen it. This can be done, for example, by integrating transverse and / or longitudinal struts in the battery module recording. The aim of such a measure is to pass the force acting on one side of the battery housing through the batterie housing without deformation. The struts are connected to the inside of the frame for this purpose with their end faces. The struts form a compartment within the frame. At least one battery module is inserted into each compartment of such a compartment. These are then also set on at least one such strut.

In such a configuration, to achieve the desired freedom from deformation at a given force acting on the frame, the required multiplicity of reinforcing struts is perceived as disadvantageous, since it is not the volume provided by the frame, but rather is only partially used as a battery volume due to the struts can be. In addition, a higher number of reinforcement struts increases the weight that cannot be used as a battery volume. In other designs, a reinforced frame is used, either through a larger cross-sectional dimensioning of the same or through a design of the same with a greater wall thickness. This also increases the weight of the battery housing.

DE 10 2018 112 141 A1 discloses a drive battery assembly which comprises a battery pack and a fuse assembly, the latter securing the battery pack to a vehicle structure. The fuse assembly is configured in such a way that it can move from a first position to a second position in response to a load, in order in this way to enable a movement of the battery pack relative to the vehicle structure.

DE 102010050609 A1 discloses a folded arrangement of a carrier element on a body of a motor vehicle, in which the carrier element is held on the body.

In addition, DE 197 38 620 C1 shows a battery carrier for a T raktions- battery of an electric vehicle, wherein the battery carrier comprises a battery tray for receiving the traction battery.

Against the background set out above, based on DE 197 38 620 C1, the object of the invention is to propose a battery housing for a motor vehicle driven by an electric or hybrid motor, in which the battery modules are better protected in the event of a crash, without, at least without, any significant loss in terms of the available battery volume.

This object is achieved by a battery housing mentioned at the beginning, in which the battery module is connected to the frame on a first side by at least one fixed bearing and on a second side by at least one floating bearing, the battery module being connected to the frame by at least one Floating bearing is positively fixed in the z-direction and a relative movement between the frame and the battery module is possible due to a deformation of the frame.

If one direction, for example the z-direction, is referred to in these explanations, then, unless otherwise stated, both directions, with the positive as well as the negative direction, are meant. The z-direction is defined as the one corresponding to the direction of gravity. The x and y directions lie in the plane orthogonal to the z direction and are each arranged orthogonally to one another. These directional information is the directional information typically used in a vehicle, with the z-direction pointing in the vertical direction, the x-direction in the longitudinal direction of the vehicle and the y-direction in the transverse direction of the vehicle. In the following explanations, however, these directions are not necessarily to be equated with the directions of a vehicle.

To improve the crash performance of the battery housing according to the invention, it is provided that the frame to which the battery module is connected can be deformed in the x and / or y direction without damaging a battery module connected to it. In contrast to previously known battery housings, a certain deformation of the frame is accepted in this battery housing to protect the battery module or modules contained therein in order to avoid damage to the battery modules up to at least a certain deformation force. For this purpose, a battery module located adjacent to the frame within the battery housing is decoupled from a deformation movement in the x or y direction. Such a relative movement can, depending on the deformation, be locally pronounced be. This is the case, for example, if the frame is not deformed over its entire length, but only in a partial section, for example as part of a pole test in which a side impact is simulated.

In order to allow a relative movement between the frame or a frame section and a battery module arranged next to it on the inside, the battery module is connected to the frame on a first side by a fixed bearing. It is also possible that the battery module is fixed on several sides by means of a fixed bearing on the frame by means of a fixed bearing. The term “frame” is to be understood as the structure that encloses a battery module. This can be about the outside frame of the battery housing as well as a section of the same, in which case a battery module next to this frame section can be framed by longitudinal and / or transverse struts. In such a case, these together with the outer frame piece form the frame of a battery module in question. By such struts a compartment is formed within the Batteriege housing, each battery module located in such a compartment is enclosed by its own frame.

In order to allow a decoupled deformation of the frame or a frame piece thereof in the event of a crash, the battery module is connected to the frame or the frame piece by means of a floating bearing at least on the side on which a deformation is to be permitted. The floating bearing fixes the battery module in a form-fitting manner with respect to the frame, at least in the z-direction. The battery module is thus guided in the plane spanned by the x and y directions. The floating bearing is designed in such a way that it allows the permitted deformation path of the frame in relation to the battery module. In addition, the connection of the battery module to the frame is designed in such a way that the frame can be deformed to the permitted extent without the deformation being transmitted to the battery module. It is envisaged that the deformation path is several millimeters in size. This can therefore be> 1 mm,> 2 mm,> 3 mm,> 5 mm,> 10 mm or even> 20 mm. This consortium takes advantage of concept that there must be a certain distance anyway between a side surface of the battery module facing the frame and the frame. This distance or part of this distance is used as an approved deformation path in the battery module according to the invention, as a departure from previously known battery housings. Within the allowed deformation path, the frame piece forming the floating bearing can be moved relative to the battery module without having to accept damage to the battery module connected to the frame piece.

The frame piece connected to the battery module by means of the floating bearing can be designed so that the permitted deformation is elastic in whole or in part. In the case of plastic deformation - in whole or in part - this can be used as an indication to check the battery housing or the battery modules contained therein, with ultimately only a check of that battery module is required to which a frame piece is deformed. In the case of battery housings that contain a large number of battery modules, this simplifies checking the battery modules.

In the floating bearing, the battery module is fixed with respect to the typically occurring impacts in the z-direction with respect to the frame. Due to the positive fixation in the z-direction, a contact surface is provided between the battery module and the frame, which has a positive effect on any cooling of the battery module that may be required. The fixation in the z-direction within the floating bearing can also be done with a certain preload. This improves the contact between the battery module and the frame. The associated frictional adhesion between the frame and the battery module will usually be chosen so that the force required to overcome the frictional adhesion is not particularly great in order not to impair the effect of the floating bearing by excessive frictional forces.

The floating bearing can be designed differently. In one embodiment it is provided that the floating bearing is supported by a flange carried by one of the two bearing partners - the frame and the battery module and a flange bearing provided by the other storage partner is formed. To provide adjustability between the frame and the battery module, the flange and / or the flange bearing has a recess. The recess is designed with such a width that a relative movement between the frame and the battery module is possible to the desired or permitted extent. The recess therefore serves to provide an adjustment mobility in the direction in which the floating bearing does not fix the battery module in relation to the frame.

It can be provided that the flange has the recess and the flange bearing is provided by a support flange together with a screw having a head, the screw with its shaft reaching through the recess of the flange and being fixed in the support flange. A positive fit of the flange on the support flange on the one hand and on the head of the screw on the other hand provides a fixation or positive fit in the z-direction.

Depending on the size of the recess, it can be provided that one or more disks which enlarge the screw head from its effective surface are arranged between the flange and the screw head.

A special feature is that the flange is basically not braced with respect to the support flange by the screw, but is only fixed in its z-direction. In order to increase the process reliability during assembly, the screw can have a threaded shaft that engages the support flange and is followed by a spacer shaft section corresponding to the length of the thickness of the flange and possibly the thickness of a washer on the head of the screw . From the shank section has a larger diameter than the Ge threaded shaft and forms with its end facing the threaded shaft egg NEN stop that acts against the top of the support flange. This limits the screw-in depth of such a screw.

In another embodiment it is provided that in a flange recess a connection member with a flange receptacle, in which an edge region of the flange recess engages and in which the edge region in z- Alignment can be held with bias is arranged. The connection member with its flange receptacles is double-C-shaped in a longitudinal section. The connection member is held on the flange by the engagement of edge regions of the recess of the flange in the flange receptacles. The connecting member itself is held ver slidably in the recess. It can be provided that the connecting member is designed as a double-flush sleeve or as a sliding block. The form fit between the material surrounding the flange recess and the flange receptacle of the connecting member ensures that the bearing partners are fixed in the z-direction. If the connecting element is connected to the flange in the z-direction under tension, this in turn has a positive effect on heat transfer between the battery module and the frame.

It is also possible that the connecting member only has a one-sided collar. The counter bearing to this first collar can be provided by the warehouse partner. In such a design of the floating bearing, the bearing partner and the collar of the connecting link jointly represent the flange mount.

In a further embodiment it is provided that the flange bearing is provided as a rail arrangement which delimits in the z-direction and in which the flange engages. In order to provide a deformation path pointing towards one another between the rail arrangement and the flange, the base of the rail arrangement - the bottom of the groove formed by the two rails of the rail arrangement - is spaced apart from the flange end. The framing of the flange by the spaced-apart rails forming the rail arrangement provides a form-fitting fixation in the z-direction.

In one possible embodiment, the battery module is fixed in the floating bearing in the transverse direction to the intended direction of deformation of the frame with respect to the battery module. With such a design, a movement between the frame and the battery module is only possible in one direction, i.e. either in the x or in the y direction. To implement such a Guide can be provided that the recess is designed in the manner of an elongated hole. This guide, designed as an elongated hole, is preferably open along one side.

If the floating bearing is designed to allow freedom of movement in only one direction, and if a connection is made between the frame and battery module by means of a connection element, the connection element has flat surfaces in the direction to be additionally fixed. As a result of the flat design, a force to be transmitted between the battery module and the frame can be transmitted flat, so that a deformation of the recess or the connecting member is prevented.

To form the fixed bearing between the battery module and the frame, one of these bearing partners can also have a flange and the other a flange bearing. However, the two flange partners are not only fixed in the z direction, but also in the x and y directions. This can be realized, for example, by a conventional connection of a battery module to a frame piece by means of a fastening screw which penetrates a flange opening and is fixed with its screw shaft in the flange bearing.

To form the fixed bearing between the battery module and the frame, it can be provided that the frame for the formation of the fixed bearing carries the flange bearing, which has a flange bearing undercut in the direction of the battery module on its flange contact side, so that the flange attached to it has a bearing to engage in the undercut of the flange angled extension carries and that a flange übergrei fendes, fixed on the flange bearing clamping part is provided, through which the flange with its extension in the undercut of the flange stop in the transverse direction to the longitudinal extent of the flange and in the z-direction form-fitting and in the direction of The longitudinal extension of the flange is held by friction. The angled extension of the battery module can be L-shaped, for example. The formation of the flange bearing with a U-shaped profiled top is a form circuit between the free leg of the angled extension of the Battery module possible in both directions transversely to the longitudinal extension of the flange bearing. It is also possible that additional elements can be arranged as flange bearings within the U-profile to form a form fit. This can be given, for example, by a section of a clamping part. As clamping elements, which clamp the angled extension between the clamping part and the U-profile, screws can be provided.

By such a fixation for forming the fixed bearing a FITS effective fixation is proposed that comes from with only a few screws. This not only reduces the assembly effort, but also the weight of the battery housing. It is advantageous if the form fit between tween the free leg of the angled extension and the U-profile is given in the direction in which the floating bearing does not fix the battery module with respect to the frame. This is particularly advantageous when the battery module is to be fixed in the floating bearing also in the transverse direction to the deformation direction of the frame with respect to the battery module.

The battery housing can be designed to accommodate a plurality of battery modules. Then the frame described above is part of a frame structure, which is formed from an outside circumferential frame structure and reinforcing struts present within the frame structure. The floating bearing is located between the battery module and the surrounding frame structure. The frame structure running around the outside is the structure that is deformed in the event of a crash. The fixed bearing is then located between the battery module and a reinforcement strut. The frame according to the invention is then formed by at least one reinforcing strut or a portion thereof and a portion of the circumferential frame structure.

The invention is described below on the basis of exemplary embodiments with reference to the accompanying figures. Show it: Fig. 1a: A battery housing according to the invention with removed cover part in a plan view of the lower part of the battery housing with battery modules located therein, Fig. 1b: The battery housing shown in Figure 1 a in a part cross-section along the line AA,

Fig. 1c: the partial cross-section shown in Figure 1b in an enlarged detailed view of the Ausnit shown in Fig. 1b,

Fig. Id: the battery housing according to Figure 1a after a deformation of an outer frame piece, Fig. 1e: The detail enlargement shown in Figure 1c in a view corresponding to that of Figure 1c, but after the deformation according to Figure 1d,

2a: the connection of a battery module with a floating bearing according to a further embodiment to a frame structure part in a plan view,

Fig. 2b: this further embodiment in a sectional view along the line B-B of Figure 2a,

Fig. 2c: in a further sectional view along the line A-A of Fig. 2a,

2d: in a perspective view of a connecting element used to implement this floating bearing,

3: an embodiment of a floating bearing according to the invention for connecting a battery module to a frame structure according to a third embodiment, 4: an embodiment of a floating bearing according to the invention for connecting a battery module to a frame structure according to a fourth embodiment,

5 shows an embodiment of a floating bearing according to the invention for connecting a battery module to a frame structure according to a fifth embodiment and FIG

6a, b: a fixed bearing cooperating with one of the above-described movable bearings for connecting a battery module to a frame structure.

FIG. 1 a shows a battery housing 1 according to the invention, the cover of which has been removed to allow a view into the battery housing 1 and is not shown in the figures. The battery housing 1 is formed by a circumferential frame structure 2 and reinforcement struts 3, 4 within the frame structure 2. The circumferential frame structure 2 and the reinforcing struts 3, 4 are formed from box profiles. The circumferential frame structure 2 has a larger cross section than the reinforcement struts 3, 4. The circumferential frame structure 2 forms together with the reinforcement struts 3, 4 a frame. Battery modules 5, 5a, 5b, 5c are inserted into the frame. Each battery module 5, 5a-5c is enclosed by a frame R due to the frame. In the illustrated embodiment, each frame R is formed by a part of the surrounding frame structure 2 and a section of the reinforcement struts 3, 4 in each case. This is indicated in Figure 1 a with a dashed line. With their long sides, the battery modules 5, 5a - 5c are each closed to the opposite frame parts. The connection of the battery modules 5, 5a-5c to their respective frame 2 is explained in more detail below with reference to the battery module 5. The battery modules 5a-5c are connected to their frame in the same way. The following statements therefore apply equally to the battery modules 5a-5c. The battery module 5 is connected on a first side 6 by a fixed bearing to the frame R, which in this regard is formed by a portion of the reinforcing strut 3. With its opposite side 7, the battery module 5 is connected to the reinforcing strut 3 opposite portion of the frame structure 2, ruled out by a floating bearing.

Figure 1 b shows the battery housing 1 shown in Figure 1 a on the section line A-A. The circumferential frame structure 2 and the reinforcing strut 3 and the battery module 5 located between these two parts of the frame R can be seen. The floating bearing connection between the battery module 5 and the frame structure 2, hence the design of the floating bearing, is shown in FIG

I c shown enlarged.

The floating bearing is formed by a flange 8 carried by one of the two bearing partners - here the battery module 5 - and a flange bearing 9 provided by the other bearing partner - here the frame R in the form of a section of the surrounding frame structure 2.

To provide adjustability between the frame R or the section of the frame structure 2 as part of the frame R and battery module 5 in a direction different from the z direction - here: the y direction - the flange 8 of the battery module 5 has a recess 10 on. This recess 10 is designed in the manner of an elongated hole which is open at the end towards the circumferential frame structure 2. The flange bearing 9 comprises a support flange 11 on the one hand and a screw 12 with a head 13 engaging therein. The support flange forms the support for the flange 8 of the battery module 5. The diameter of the head 13 is greater than the clear width of the recess 10 in x Direction. To form the floating bearing be the flange 8 is thus between the top of the support flange

II and the head 13 of the screw 12. By the plant of the recess 10 of the flange 8 surrounding material against the support flange 11 on the one hand and the screw head 13 on the other hand, the battery module 5 is fixed to the circumferential frame structure 2 in the z-direction. At the same time, an adjustability in y- Given direction. For this purpose, the space required between the circumferential frame structure 2 and the end of the battery module 5 facing the frame structure 2 is used for the purpose of mounting and ventilating the battery module 5. The engagement of the screw 12 in the arrangement of battery module 5 and frame structure shown in FIG. 1c 2 takes place within the recess at a position that there is space between the screw shaft and the end of the recess 10 on the battery module side for the frame structure part to be adjusted with respect to the battery module 5.

Such a relative movement between the frame structure 2 and the battery module 5 can be caused by a deformation of the surrounding frame structure 2. In FIGS. 1 a and 1 b, a post 16 is drawn in for illustration purposes, which in these two figures rests against the circumferential frame structure 2 on the outside in the region of the battery module 5. While FIGS. 1 a - 1 c show the floating bearing with which the battery module 5 is connected to the frame structure 2 in its normal position, FIGS. 1 d and 1 e show the battery housing 1 or the arrangement between the battery module 5 and the surrounding frame structure 2 according to a local deformation. In FIGS. 1 a, 1 b and 1 d, the post 16 for simulating a side impact on the battery housing 1 is shown as a deformation-triggering obstacle. FIGS. 1d and 1e show the simulated side impact on the post 16, carried out with the maximum permissible force that can be absorbed by the battery housing 1. In the fi gures 1d and 1e it can be seen that the distance 14 between the support flange 11 and the battery module 5 is almost no longer present. The force acting locally on the outside of the frame structure 2 as a result of the side impact has indeed led to a deformation of the frame piece of the frame R provided by the frame structure 2. Due to the floating bearing connection of the battery module 5 to the frame structure 2, however, this deformation energy is not transmitted to the battery module 5, but has been absorbed by the permitted deformation. The battery riemodul 5 therefore remains undamaged despite deformation of part of its frame R. In this exemplary embodiment, the design of the recess 10 as an elongated hole also represents a fixation of the battery module 5 in the x-direction in the simulation described above. Due to the permitted deformation of the frame structure 2 with respect to the neighboring battery modules, here: the battery module 5, a higher deformation force can be absorbed by this, the battery modules contained in the battery housing 2 remaining damage-free.

In order to be able to provide free movement in the floating bearing between the two bearing partners, the screw 12 has a threaded shaft engaging in the support flange 11, which is smaller in diameter than a spacing shaft located between the threaded shaft and head 13. By providing a shoulder V between the threaded shaft and the spacer shaft section, the screw 12 does not brace the flange 8 with the support flange 11, but rather limits the screw-in depth in the z-direction, so that the flange 8 can move freely in the intended direction.

One of the multiple floating bearings with which the battery module 5 is connected to the frame structure 2 is described above. As can be seen from FIG. 1, the battery module 5 is connected to the frame structure 2 with a plurality of such connections arranged at a distance from one another.

FIGS. 2a to 2c show, in a further exemplary embodiment, a battery module 5.1, which is connected on one side to part of a circumferential frame structure 2.1. Figure 2b shows the floating bearing in a first cross section. The floating bearing is basically constructed like that of the battery riegehäuses 1, with which the battery module 5 is connected to the surrounding frame structure 2. The battery module 5.1 thus has a flange 8.1 into which a recess 10.1 open at the end is made in the manner of an elongated hole. In the recess 10.1 within the recess 10.1 in the longitudinal extension of the same ver displaceable connection member 16 is arranged. The connecting member 16 is penetrated by a screw 12.1. The screw 12.1 has a screw head 13.1, which with its underside on the connecting member works. In addition, the connecting member 16 rests on the support flange 11.1 of the surrounding frame structure 2.1. The connecting member 16 serves as a spacer between the screw head 13.1 and the support flange 11.1 of the surrounding frame structure 2.1, which in this embodiment provides the flange bearing.

FIG. 2c shows the described arrangement in a sectional view orthogonal to FIG. 2b. The connecting member 16 has a flange receptacle provided by two collars 17, 18 into which the flange 8.1 of the battery module 5.1 engages. In order to compensate for tolerances, at least one of the two collars 17, 18, here on both collars 18, 19, is made in the notch base 19 running in the transverse direction of the screw. Through the recess 19, in conjunction with an elastic resilience of the collars 17, 18, a preload can be applied to the flange 8.1, by means of which tolerances in the thickness of the flange 8.1 can also be compensated if a system under a certain preload is desired. This is useful for heat transfer.

Figure 2d shows the connecting member 16 in a perspective view. The flange receptacles formed by the collars 17, 18 on two opposite sides can be clearly seen therein, as can the central bore through which the shaft of the screw 12.1 is penetrated.

Figure 3 shows a further alternative embodiment of the design of a floating bearing between a battery module 5.2 and a circumferential frame structure 2.2. In the embodiment according to FIG. 3, the flange bearing is designed as a rail arrangement. The rail arrangement is formed by a first rail 20 and a second rail 21 running parallel and at a distance from it. Due to the distance between the two rails 20, 21 there is a groove between them. The flange 8.2 of the battery module 5.2 engages in this so that a form fit between the rails 20, 21 and the flange 8.2 of the battery module 5.2 is provided in the z-direction. To provide a deformation path, a distance is left between the end of the flange 8.2 of the battery module 5.2 and the rail base 22. There is also a distance of 14.2 given between the remaining parts of the surrounding frame structure 2.2 and the battery module 5.2.

A flange bearing formed from two rails can also be part of the battery module. Such a configuration of a floating bearing for connecting a battery module 4.3 to a frame structure 2.3 is shown in FIG. Here the battery module 5.3 carries the flange bearing, formed from two rails 20.1, 21 .1, while the surrounding frame structure 2.3 carries the flange 8.3. The flange 8.3 engages in the groove formed by the rails 20.1, 21 .1 and is guided in this way in the z-direction. In addition, the further statements relating to the exemplary embodiment in FIG. 3 apply equally to this embodiment.

FIG. 5 shows a configuration, similar to the exemplary embodiment in FIG. 3, of providing a floating bearing for connecting a battery module 5.4 to a circumferential frame structure 2.4. In this exemplary embodiment, the rail arrangement is not provided by two rails molded onto the frame structure 2.4, but rather by a rail profile 23 with a U-shaped cross section. The rail profile is with its open side facing the battery module 5.4 on a connection flange 24, integrally formed on the frame structure 4.2 and is connected to this at a suitable point by screws.

In an embodiment according to FIGS. 3, 4 and 5, it is advantageous that a relative movement between the respective battery module 5.2, 5.3, 5.4 and the respective circumferential frame structure 2.2, 2.3, 2.4 or the frame structure adjacent to the respective battery module 5.2, 5.3, 5.4 section in two directions, namely in the y- and x-direction is possible. In this way, a further increase in security is ensured, since the surrounding frame structure 2.2, 2.3, 2.4 is decoupled from the battery module 5.2, 5.3, 5.4 not only in one direction, but in one plane.

Figure 6a and 6b show a fixed bearing connection of adjacent battery modules on the reinforcement strut 3.1 of a further battery housing ses. The battery modules 5.5, 5.6 arranged adjacent to the reinforcement strut 3.1 are connected to the circumferential frame structure 2.5 with their sides opposite the fixed bearing by a floating bearing, as described for the embodiment of the battery housing 1.

Basically, the fixed bearing connection can be designed like the loose bearing connection, namely in that one of the two bearing partners provides a flange and the other bearing partner provides a flange bearing and both bearing partners are fixed to one another and an adjustment of the bearing partners in x-, y- , and z-direction is not possible. In the exemplary embodiment of the battery housing 1, the battery modules 5, 5a-5c each have a flange which rests on the upper side of the reinforcement strut 3 and is fastened to the reinforcement strut 3 by means of screws. In the exemplary embodiment of the fixed bearing, as shown in FIGS. 6a, 6b, the flanges 25, 25a each carry an extension 26, 26a angled with respect to its flat extension. The direction of the bend is directed towards the upper end of the reinforcement strut 3.1. The reinforcement strut 3.1 is on the top U-shaped per filiert. The angled extensions 26, 26a of the flanges 25, 25a engage in this undercut formed from the viewing direction of the respective battery module 5.5 or 5.6. Thus, the battery modules 5, 5.6 in the direction of the reinforcing strut 3.1 are pioneeringly positively connected to this. The fixed bearing also includes a clamping part 28, which starts from a central abutment bar (not recognizable in FIG the flanges 25, 25a engages. This is fastened to the reinforcement strut 3.1 by a few screws 29 arranged at a distance from one another.

By means of the clamping part 28 and the screws 29, the flanges 25, 25a with their extensions 26, 26a are fixed not only in the z-direction and in the y-direction by a form fit, but also by a frictional connection in the x-direction. Thus, with this fixed bearing, there is a form-fluid fixation in two directions and a frictional fixation in one direction. The invention has been described on the basis of exemplary embodiments. Without departing from the scope of protection described by the claims, numerous further refinements will arise for the person skilled in the art to implement the subject matter of the invention.

List of reference symbols

1 battery case

2, 2.1, 2.2, 2.3, 2.4 Circumferential frame structure 3, 3.1, 4 reinforcement struts, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5a, 5b, 5c battery modules

6, 6.1 First page

7, 7.1 Second page

8, 8.1, 8.2, 8.3, 8.4 flange 9 flange bearing

10, 10.1 recess 11, 11.1 support flange 12, 12.1 screw

13, 13.1 screw head

14, 14.1 distance

15 lower process

16 connecting link 17, 18 collar

19 deepening

20, 20.1, 21, 21.1 rail

22 Rail base

23 rail profile

24 connection flange

25, 25a flange

26, 26a appendix

28 clamping part

29 screw

R frame V paragraph

Claims

Battery housing for a motor vehicle with at least one battery module (5) and a frame (R) enclosing the battery module (5) on which the battery module (5) is fixed, characterized in that the battery module (5) is attached to the frame (R) a first side (6, 6.1) is connected by at least one fixed bearing and on a second side (7, 7.1) by at least one floating bearing, the battery module (5) being connected to the frame (R) by the at least one floating bearing in the z-direction Is positively fixed and a relative movement between the frame (R) and the battery module (5) due to a deformation of the frame (R) is possible.

Battery housing according to claim 1, characterized in that the floating bearing is supported by a flange (8, 8.1, 8.2, 8.3, 8.4) carried by one of the two storage partners - battery module (5) or frame (R) and a flange (8, 8.1, 8.2, 8.3, 8.4) provided by the other storage partner Flange bearing (9) is formed, the flange (8, 8.1, 8.2, 8.3, 8.4)) and / or the flange bearing (9) having a recess (9) to allow the relative movement between the frame (R) and the battery module (5) 10, 10.1) to guide the other storage partner.

Battery housing according to claim 2, characterized in that the flange (8, 8.1) has the recess (10, 10.1) and the flange bearing (9) is provided with a support flange (11) and a screw (12, 13.1) having a head (13, 13.1). 12.1) is formed, the screw (12, 12.1) reaching through the recess (10, 10.1) of the flange (8, 8.1) with its shaft and being fixed in the support flange (11).

Battery housing according to one of claims 2 or 3, characterized in that a connecting member in the recess (10.1) (16) is arranged with a flange receptacle in which a rim area of the recess (10.1) of the flange (8, 8.1, 8.

2, 8.

3, 8.

4) engages and in which this edge area is held in the z-direction with bias voltage.

5. Battery housing according to one of claims 2 to 4, characterized in that the flange bearing is provided at least in sections by a rail arrangement (20, 20.1, 21, 21 .1, 23) limiting the mobility of the flange in the z-direction, which rail arrangement is two from each other spaced rails and a groove located between these rails as a recess into which the flange (8.2, 8.3, 8.4) engages.

6. Battery housing according to one of claims 1 to 5, characterized in that the battery module (5) in the floating bearing in the transverse direction to the deformation direction of the frame (R) with respect to the battery module (5), at which deformation the distance between the frame (R ) and the battery module (5) is reduced, is fixed.

7. Battery housing according to claim 6 in its back reference according to one of claims 1 to 5, characterized in that the recess (10, 10.1) is a translational movement permitting guide slot which is open at its one longitudinal end.

8. Battery housing according to one of claims 1 to 7, characterized in that the fixed bearing is formed by a flange carried by one of the bearing partners - battery module or frame - and a flange bearing provided by the other bearing partner and the flange is fixed on the flange bearing.

9. The battery housing according to claim 8, characterized in that the two bearing partners are fixed to one another by several screws extending through the flange and fixed in the flange bearing.

10. Battery housing according to claim 8, characterized in that the frame (R) for forming the fixed bearing carries the flange bearing which has undercut flange bearing on its flange contact side in the direction of the battery module (5.5, 5.6) and that the flange (25, 25a) carries an extension (26, 26a) angled to engage in the undercut of the flange bearing.

11. Battery housing according to claim 10, characterized in that a flange (25, 25a) overlapping, fixed to the flange bearing clamping part (28) is provided, through which the with its extension (26, 26a) fende in the undercut of the flange bracket Flange (25, 25a) therein in the transverse direction to the longitudinal extent of the flange (25, 25a) and in the z-direction in a form-fitting manner and in the direction of the longitudinal extent of the flange (25, 25a) is held Reibschlüs sig.

12. Battery housing according to one of claims 1 to 11, characterized in that the frame (R) is part of a frame compartment, which consists of an externally circumferential frame structure (2, 2.1, 2.2, 2.3, 2.4) and at least one within the frame structure (2 , 2.1, 2.2, 2.3, 2.4) existing reinforcing struts (3, 3.1, 4) ge, the floating bearing between the battery module (5) and the frame structure (2, 2.1, 2.2, 2.3, 2.4) and the fixed bearing between the battery module ( 5) and a reinforcing strut (3, 3.1) is provided.