DE102021106801A1 - Energy storage floor assembly for an electrically driven motor vehicle - Google Patents

Abstract

The invention relates to an energy storage floor assembly for an electrically drivable motor vehicle, with a storage housing (13) for accommodating an electrical energy storage device (36), which comprises at least one housing part (1) which, for arranging the storage housing (13), is provided on the underside of a floor assembly (38 ) of the motor vehicle body is fastened to respective side skirts (22) running in the area of the vehicle outer sides of the underbody (38), and with crash elements (27) running in the area of the side skirts (22). To create an underbody, the respective crash element (27) is designed as a component that is separate and detachable from the respectively laterally assigned side skirt (22) and the at least one housing part (1) of the accumulator housing (13).

Description

The invention relates to an energy storage floor assembly for an electrically driven motor vehicle according to the preamble of patent claim 1.

Such an energy storage floor assembly is, for example, already from the EP 3 486 101 B1 known and comprises a storage housing for accommodating an electrical energy storage device, which has at least one housing part which is fastened to the underside of an underbody of the motor vehicle body on respective side skirts running in the area of the vehicle outer sides of the underbody to arrange the storage housing.

In order to particularly and preferably protect the accumulator housing or the energy accumulator arranged within it from excessive damage in the event of a side impact on the motor vehicle, respective crash elements are usually arranged on the outside of the vehicle. In the case of non-load-bearing accumulator housings in particular, these crash elements are usually permanently integrated into the corresponding side skirts on the side. In the case of load-bearing accumulator housings, on the other hand, the respective crash elements are usually permanently integrated into the accumulator housing on the outside.

The integration of the crash elements carried out in this way, either in the side skirts or in the accumulator housing, only allows limited adaptation to different vehicles or vehicle concepts. A new storage variant or body variant usually has to be created for different vehicles or vehicle concepts. In addition, such crash elements are a hindrance, particularly in the case of servicing, when the accumulator housing has to be removed from the vehicle. Finally, such crash elements are also problematic with regard to the side sill paneling, since this has to be designed very voluminously or in particular in two parts in order to cover the respective crash elements.

The object of the present invention is therefore to create an energy storage floor assembly of the type mentioned at the outset, which can be adapted particularly favorably to different vehicles.

According to the invention, this object is achieved by an energy storage floor assembly having the features of patent claim 1 . Advantageous configurations with favorable developments of the invention are specified in the dependent claims.

The energy storage floor assembly according to the invention comprises a storage housing for accommodating an electrical energy storage device, which has at least one housing part which is fastened to the respective side sills running in the area of the vehicle outer sides of the floor assembly for arranging the storage housing on the underside of a floor assembly of the motor vehicle body.

In order to create an energy storage floor assembly that can be adapted particularly favorably to different vehicles or vehicle concepts and vehicle variants, it is provided according to the invention that the respective crash element is designed as a separate component from the respective laterally assigned side skirt and the at least one housing part of the storage housing . The great advantage of such a crash element, which is designed separately from the respective laterally assigned side skirts and the at least one housing part of the accumulator housing, is that it is much more scalable, i.e. it can be adapted, for example, to different vehicle series or vehicle drive variants or the like. In contrast to the previous state of the art, it is therefore not necessary to create a complete accumulator variant (with crash elements integrated in the accumulator housing) or a new body variant (with crash elements integrated in the side skirts) for a new vehicle variant, but rather only the respective crash element, for example on the Dimensioning or the weight of the respective vehicle or the respective energy storage can be adjusted. In addition, the respective crash element can be dismantled separately, so that, for example, there is a significantly simpler construction with regard to assembly and disassembly of the accumulator housing, for example. For example, the crash elements can be removed in advance before the storage housing is dismantled with the energy storage. In addition, there are also advantages here, for example, in the design of the respective crash elements in the area of car jack receptacles, which previously had to be cut out in an extremely large format if they could only be removed together with the accumulator housing. Now there is the possibility of removing the crash elements separately, so that the respective recesses located therein can be significantly smaller. This in turn has advantages in the event of a side collision, since when an obstacle, such as a pole, hits the area of a particular cutout for a car lifter recording with much lower weakening of the crash element is to be expected. In addition, it is a further advantage that respective sill panels of the side sill can be made significantly smaller or no longer have to be designed in two parts. Finally, there are also advantages with regard to the design of the side sill, since this can be produced in a mixed construction, for example, without significant additional corrosion protection measures having to be taken here. Rather, for example, the side skirts on the body and the crash element that supplements them in terms of their crash performance can be made of different materials.

In a further embodiment of the invention, it has proven to be advantageous if the respective crash element is releasably attached to the at least one housing part of the accumulator housing and is connected to the respective side sill of the underbody via the at least one housing part of the accumulator housing. In this solution, provision is therefore made for the respective crash elements to be detachably arranged on the accumulator housing or the at least one housing part of the accumulator housing and to be fastened together with the accumulator housing on the underside of the floor pan on the respective side sills. In the event of disassembly, the crash elements can be removed separately from the accumulator housing and also separately from the respectively associated side skirts, before the accumulator housing with the energy accumulator is to be dismantled, for example. This results in particularly flexible assembly and disassembly of the accumulator housing with the crash elements, with the crash elements also being able to be removed particularly cheaply on a lifting platform by removing them separately, for example without the need for significant or excessive cutouts within the crash elements for the respective jacking points.

As an alternative to this, it is also conceivable that the respective crash elements are detachably fastened to the laterally associated side skirts. A direct connection of the respective crash elements to the accumulator housing is therefore not provided in the present embodiment. Here, too, it is advantageous that simple assembly and disassembly of both the crash elements and the accumulator housing is possible. Here, too, the crash elements can be removed in a simple manner on a lifting platform from the respective side skirts and also from the accumulator housing, without excessively large recesses being required for the respective car jack receptacles.

In a further favorable embodiment of the invention, the respective crash element is also detachably connected to a component of the accumulator housing arranged behind it in the transverse direction of the vehicle, in particular a crash profile. This fixation of the crash element on the accumulator housing makes it possible to better absorb loads acting on the crash element from the operating loads in the vertical direction of the vehicle and to be able to better support and absorb torques acting on the crash element, for example to connect the crash element to the side skirts.

In a further embodiment of the invention, the respective crash element is designed as an extruded profile, in particular made of an aluminum alloy. Such extruded profiles can not only be produced particularly inexpensively, but are also easy to process and are particularly advantageous in terms of corrosion protection. In addition to this, they have a particularly favorable energy absorption capacity and can be easily adapted to a specific crash behavior, for example by dimensioning their wall thicknesses or hollow chambers accordingly.

A further advantageous embodiment, which is provided as an alternative to that according to patent claim 5, provides that the respective crash elements are designed as steel profiles made of a high-strength steel alloy. Steel profiles of this type can be produced, for example, by roll profiling or by another forming technology. These steel profiles have particularly strong material properties in order to optimally protect a storage housing or the energy storage device arranged therein in the event of an accident-related force being applied.

In a further embodiment of the invention, a respective crash profile on the storage housing side is fastened on the inside of the respective crash element to the at least one housing part of the storage housing. Thus, at least two crash components are provided on each side of the vehicle, namely on the one hand a respective crash profile fixedly arranged on the accumulator housing and on the other hand a respective crash element which is fastened in the manner described either to the associated side skirts or to the accumulator housing. Due to the additional crash profiles on the side of the storage housing, the storage housing in particular can be reinforced on the outside of the vehicle in order to avoid significant deformation and thus excessive damage to the energy storage device.

In this context, it has also been shown to be advantageous if a gap is formed between the respective crash element and the respective laterally corresponding crash profile of the at least one housing part of the accumulator housing. Such a gap is particularly advantageous for better assembly in an assembly direction running in the vertical direction of the vehicle, but also with regard to the NHV properties (noise, roughness and vibrations of the vehicle). In the event of a side collision, the crash element can also be supported on the crash profile arranged behind it on the inside.

Finally, it has proven to be advantageous if respective spacer elements are provided on the crash element for support on the associated side sill or on the at least one housing part of the accumulator housing. As a result, the crash elements are arranged at a distance from the side skirts or storage housing, which has significant advantages in terms of corrosion, for example.

Further features of the invention result from the claims, the figures and the description of the figures. The features and combinations of features mentioned above in the description and the features and combinations of features mentioned below in the description of the figures and/or shown alone in the figures can be used not only in the combination specified in each case, but also in other combinations or on their own.

• 1 eine schematische Perspektivansicht auf ein Gehäuseunterteil eines Speichergehäuses für einen elektrischen Energiespeicher eines Personenkraftwagens mit einem als einstückiges Umformbauteil hergestellten Stahlrahmen, der mit einem Schließteil aus Aluminiumwerkstoff verbunden ist;
• 2 eine ausschnittsweise und perspektivische Schnittansicht auf eine Längsseite des Gehäuseunterteils gemäß 1 wobei jeweilige Distanzringe erkennbar sind, unter deren Vermittlung das Gehäuseunterteil beziehungsweise das Speichergehäuse mit seitlich korrespondierenden Seitenschwellern der Kraftwagenkarosserie verbindbar sind und wobei außerdem ein als Strangpressprofil ausgebildetes Energieabsorptionselement erkennbar ist, welches über jeweilige dargestellte Buchsen unmittelbar am korrespondierenden Seitenschweller verbunden sind;
• 3 eine ausschnittsweise Schnittansicht durch das Speichergehäuse sowie den korrespondierenden Seitenschweller, an welchem das Speichergehäuse befestigt ist, sowie außerdem eine Schnittansicht durch das seitlich korrespondierende Energieabsorptionselemente;
• 4 eine ausschnittsweise Perspektivansicht auf eine Befestigungsstelle eines das Gehäuseunterteil aussteifenden Aluminium-Querträgers, welcher unter Vermittlung jeweiliger Stahladapter an den Stahlrahmen befestigt ist; und in den
• 5a-5c jeweilige ausschnittsweise Schnittansichten auf die Befestigung des Speichergehäuses an der Kraftwagenkarosserie im Bereich eines Seitenschwellers auf der entsprechenden Fahrzeugseite, wobei in 5a die Anordnung und Befestigung eines Profils außenseitig des Stahlrahmens des Gehäuseunterteils erkennbar ist, 5b die Befestigung des Gehäuseunterteils beziehungsweise des Speichergehäuses an dem Seitenschweller zeigt und 5c die anschließende Befestigung der als Energieabsorptionselemente ausgebildeten Strangpressprofile separat von dem Speichergehäuse an dem korrespondierenden Seitenschweller zeigt.
• 6 drei Schnittansichten auf die Energiespeicher-Bodengruppe in Fahrzeughochrichtung beziehungsweise in Fahrzeugquerrichtung verlaufenden jeweiligen Schnittebene auf die Befestigung eines der Crashelemente am Speichergehäuse sowie dessen Befestigung am seitlich korrespondierenden Seitenschweller;
• 7 jeweilige Schnittansichten auf die Energiespeicher-Bodengruppe in einer zu 6 alternativen Ausführungsform entlang einer jeweiligen, in Fahrzeugquerrichtung beziehungsweise in Fahrzeughochrichtung verlaufenden Schnittebene auf die Befestigung des Speichergehäuses am entsprechenden Seitenschweller sowie die anschließende Befestigung des seitlich korrespondierenden Crashelements am Seitenschweller; und in
• 8 eine ausschnittsweise Unteransicht auf die Energiespeicher-Bodengruppe sowie jeweilige Tragarme einer Hebebühne, auf welchen die Energiespeicher-Bodengruppe im Bereich jeweiliger Wagenheberaufnahmen ruht.

The invention will now be explained in more detail using a preferred exemplary embodiment and with reference to the drawings. Show it:

• 1 a schematic perspective view of a lower housing part of a storage housing for an electrical energy storage device of a passenger car with a steel frame produced as a one-piece formed component, which is connected to a closing part made of aluminum material;
• 2 a detail and perspective sectional view of a longitudinal side of the housing base according to 1 wherein respective spacer rings can be seen, through which the lower housing part or the accumulator housing can be connected to corresponding side skirts on the side of the motor vehicle body and wherein an energy absorption element designed as an extruded profile can also be seen, which is connected directly to the corresponding side skirts via the respective sockets shown;
• 3 a fragmentary sectional view through the storage housing and the corresponding side sill to which the storage housing is attached, and also a sectional view through the laterally corresponding energy absorption elements;
• 4 a fragmentary perspective view of a fastening point of an aluminum cross member stiffening the lower housing part, which is fastened to the steel frame through the intermediary of respective steel adapters; and in the
• 5a-5c respective partial sectional views of the attachment of the accumulator housing to the motor vehicle body in the area of a side sill on the corresponding side of the vehicle, in which 5a the arrangement and fastening of a profile can be seen on the outside of the steel frame of the lower part of the housing, 5b shows the attachment of the lower housing part or the storage housing to the side skirts and 5c shows the subsequent fastening of the extruded profiles designed as energy absorption elements separately from the accumulator housing on the corresponding side skirts.
• 6 three sectional views of the energy storage floor assembly in the vertical direction of the vehicle or in the vehicle transverse direction, the respective sectional plane showing the attachment of one of the crash elements to the storage housing and its attachment to the corresponding side skirts on the side;
• 7 respective sectional views of the energy storage floor assembly in one 6 alternative embodiment along a respective sectional plane running in the transverse direction of the vehicle or in the vertical direction of the vehicle on the attachment of the accumulator housing to the corresponding side sill and the subsequent attachment of the laterally corresponding crash element to the side sill; and in
• 8th a sectional view from below of the energy storage floor assembly and respective support arms of a lifting platform, on which the energy storage floor assembly rests in the area of the respective jacking points.

1 shows a perspective view of a lower housing part 1 for a storage housing 13 ( 3 ) of an electrical energy store 36 ( 2 ) of a passenger car. This lower housing part 1 is equipped with a circumferential sealing flange 2 in a manner that will be described in more detail below, through which it is connected to an in 3 indicated sealing flange 3 a housing upper part 4 can be connected through the intermediary of a seal 5.

In the present case, the lower housing part 1 has a steel frame 6, which is designed here as a one-piece formed component made of a steel material, for example a BH steel. Here, the steel frame 6 can be deep-drawn in one or more trains. In the present case, the steel frame 6 has a central opening 7 which is closed by a closing part 8 which forms a base and is made of a light metal material, in particular an aluminum material. In the present case, the closing part 8 is formed, for example, from an aluminum sheet made of the material AL6-OUD or the like. Of course, other aluminum or light metal sheets and also other plate elements made of light metal material would also be conceivable here.

Aluminum support elements 9 are also provided to reinforce the lower housing part 1 or the closing part 8, which are formed, for example, from formed aluminum sheet or as an extruded profile and are connected to the closing part 8, for example, by gluing and/or by semi-hollow punch rivets. The connection of the respective support elements 9 to the steel frame 6, which is particularly important in terms of corrosion, is made via the respective steel adapter 10, which is connected to a vertical leg 11 and a horizontal leg 12 of the steel frame 6, for example by joining.

Together with the 2 and 3 , which show the lower housing part 1 in a fragmentary and perspective sectional view in the area of one of the vehicle exteriors or the arrangement of the accumulator housing on the motor vehicle body in a fragmentary sectional view along a sectional plane running in the vehicle vertical direction or vehicle transverse direction, is now intended to show the lateral configuration of the housing lower part 1 and the fastening of the Storage housing are explained in the field of vehicle exterior.

How from the 2 and 3 As can be seen, a crash profile 14 belonging to the accumulator housing 13 is arranged from the outside on the leg 11 running in the vertical direction of the vehicle, which crash profile 14 extends at least over a predominant length area of the respective vehicle outside of the housing lower part 1 or the accumulator housing. This crash profile 14 on the storage housing side is formed, for example, from a high-strength or ultra-high-strength steel, for example a CP steel, and is produced by roll forming or similar forming technology. It can also be seen that the leg 11 running in the vertical direction of the vehicle merges into the sealing flange 2 and then extends downward with a wall region 15 in the vertical direction of the vehicle before another flange 16 - running in the transverse direction of the vehicle or horizontally - connects. The crash profile 14 on the storage housing side is designed in such a way that it is surrounded on the one hand with a profile area 17 by the leg 11 , the sealing flange 2 and the wall area 15 on the outer circumference. In addition, crash profile 14 on the accumulator housing side has an inner flange 18 which is connected to leg 12 of the steel frame running in the vehicle transverse direction and at least essentially horizontally, and a flange 19 which is connected to flange 16 of steel frame 6 .

It can also be seen that on the outside of the wall area 15 and on the top of the flange 16 of the steel frame 6, a further, respective lateral profile part 20 is fastened, for example by welding or another joint connection, which is created, for example, from the same material as the crash profile 14 on the storage housing side. About this profile part 20, the lower housing part 1 or the accumulator housing as a whole is fastened by means of respective screw connections 21 to the corresponding lateral side skirts 22 of the passenger vehicle. For this purpose, the respective screw connection 21 comprises a screw bushing 23 which is arranged on the inside of the side sill 22 and in which a screw 24 is accommodated. The flange 19 of the profile part 20 is supported on the underside of the side sill 22 by means of a disk or the like supporting element 38 .

Analogously to the lateral profile parts 20, respective profile parts 37 are also attached to the steel frame at the front and rear end of the steel frame 6 by welding or another joint connection. In 1 only the front profile part 37 can be seen, which is connected to a front shear panel and/or a front cross member. The rear profile part, which cannot be seen, is connected, for example, indirectly to the underbody of the motor vehicle body and to a rear axle support.

In 3 Furthermore, on the upper side of the sealing flange 2, the sealing flange 3 of the upper housing part 4 can be seen, which is placed on the lower housing part 1 to form the accumulator housing 13 and is tightly closed relative to it. The upper housing part 4 can be designed, for example, as a steel cover and can therefore be connected to the lower housing part 1 in a simple manner. Above the housing upper part 4 is a driver zeugboden 58 or associated support elements can be seen, which extend between the respective side sills 22 of the floor assembly of the motor vehicle body.

Furthermore, in the 2 and 3 a reinforcement and crash element 27 in the form of an extruded aluminum profile, which is formed separately from the accumulator housing and the side skirt 22 on the side skirt 22 and can be seen, which is 2 Recognizable screw connections 26 can be fastened on the underside of the respective side sill 22 and also on the underside of the flange 19 of the lower housing part 1 . The flange 19 has this - as from 2 can be seen - respective recesses 28, so that the crash profile 27 can be attached separately from the storage housing or the lower housing part 1 on the side skirts 22. When the accumulator housing or lower housing part 1 is subsequently dismantled from the side sill 22, the energy absorption element or crash element 27 can accordingly be removed beforehand. For this purpose, the crash profile 27 in 2 recognizable through openings 29, so that the respective screw connection 26 is accessible from below.

Furthermore is off 3 It can be seen that both the interior of the accumulator housing itself and the respective chambers 30, 31, 32 of the crash profile 14 attached to the outside of the leg 11 of the steel frame 6 are designed as drying rooms. In the exemplary embodiment shown, the respective hollow chambers of the crash profiles 37 at the front and rear of the steel frame 6 are also designed as drying spaces. The respective hollow chambers of the crash profile 27 made of aluminum, on the other hand, are designed as damp spaces in the present case.

In the 5a until 5c the arrangement of the storage housing and the crash element 27 on the vehicle underbody or on the corresponding side skirts 22 are shown in a slightly modified embodiment in respective partial sectional views along a sectional plane running in the vehicle vertical direction or in the vehicle transverse direction. In order to avoid repetitions, only the differences will be discussed.

In the present case, the lower housing part 1 or its steel frame 6 has a flange 16 adjoining the wall section 15, which extends in the transverse direction of the vehicle and horizontally to below the side sill 22 and consequently - as shown 5b can be seen - is used to attach the storage housing to the motor vehicle body shell. In contrast to the embodiment according to the 1 until 4 the steel frame 6 is therefore directly connected to the corresponding side sill 22 in the present case. In this way, in particular, joints that could be leaking can be avoided. In particular, it can be seen in 5b again that the flange 16 of the steel frame 6 by means of the screw connection 21 (screw sleeve 23, screw 24, washer 25) can be fastened to the side skirt 22. So that the screw connection 21 is accessible, the recesses 28 are provided in the crash profile 27 accordingly.

In 5a First of all, the seal 5 on the sealing flange 2 of the lower housing part 1 is explicitly shown and marked. Furthermore, it can be seen how the crash profile 14 can be arranged on the outside of the leg 11 of the lower housing part 1 . This can be done, for example, by one-sided joining technology between the steel frame 6 and the crash profile 14 , for example via sealing screws screwed in from above, which interact with respective fixed screw nuts 34 on the side of the crash profile 14 .

5c finally shows a concrete embodiment of a possible attachment of the respective crash profile 27 to the corresponding side skirt 22. Here, for example, screw receptacles 35 arranged on the side skirt 22 can be provided, to which the respective crash profile 27 can be fixed by means of a respective screw that can be inserted through the corresponding recesses 29 can. Here, the flange 16 also shows how this is done 2 As can be seen, there is a recess 33 in the area of the screw connection 26, so that the direct attachment of the crash profile 27 to the side sill 22 is possible in the present case.

Alternatively to this, the crash profile 27 can also be fastened to the accumulator housing, for example to the lower housing part 1, and together with this to the underbody, in particular to the side sills 22.

By using the crash profiles 27 mounted on the side skirt 22, the crash performance can be significantly optimized and in particular scaled, in particular with regard to a side impact on a pole. This means that depending on the size of the energy store 36 or the storage housing, the vehicle weight, the type of vehicle body or other criteria, an individually adjustable crash profile 27 is selected, which is designed, for example and in particular, as an aluminum extruded profile. Thus, in a simple manner Dimensions, wall thicknesses and chamber profiles of the crash profile 27 are dimensioned and adjusted in order to obtain optimal crash performance.

In 5c It can also be seen that the respective crash element 27 is also detachably connected to the crash profile 14 or another component of the accumulator housing 13 arranged behind it in the transverse direction of the vehicle by means of a screw connection 50 . For this purpose, on an inner side 55 of the crash element 27 , a tab 51 is placed diagonally inwards and downwards, which is created, for example, as part of the extrusion of the crash element 27 or by joining it to the crash element 27 . By means of a screw 52, which passes through a wall area 56 of the crash profile 14 adapted to the course of the tab 51 in the area of an opening 52, and by means of a nut 54 acting together with the screw 52, the crash element 27 is hereby attached in an inner lower area 57 fixed to the storage case 13. This fixing of the crash element 27 to the accumulator housing 13 shown in the embodiment shown here makes it possible to better absorb loads of the crash element 27 from the operating loads acting in the vertical direction of the vehicle and to be able to better support and absorb moments acting on the crash element around the screw connection 26.

A gap 41 is provided between the inner side 55 of the crash element 27 and the crash profile 14 of the accumulator housing 13, which is intended in particular to improve the installation of the crash element 27 in an installation direction running in the vertical direction of the vehicle, but also with regard to the NHV properties (noise, roughness and vibrations of the vehicle ) is beneficial. The gap 41 is provided in the wet area of the motor vehicle. However, the crash element 27 is fastened to the crash profile 14 by means of the screw connection 50 in such a way that its cavity 31 is still designed as a dry space.

In 6 an embodiment of the energy storage floor assembly is shown in respective sectional views along a sectional plane running in the vertical direction of the vehicle or in the transverse direction of the vehicle, in which, according to the illustration on the left in 6 according to the arrow 40 the crash element 27 is fastened from the underside in the vertical direction of the vehicle in the upward direction via a flange 16 on the outside of the housing part 1 of the accumulator housing 13 . This is done via detachable connecting means, in the present case via respective bolts 42, which - as can be seen from the middle representation of 6 can be seen - interact with screw nuts 43 on the side of the crash element 17, which can be brought into position from below via corresponding openings 44 within the crash element 17. At the top of the crash element 27 are spacer elements 39 for supporting the crash element 27 which can be supported at a distance from the flange 16 on the outside of the housing part 10 .

As further from the right representation of 6 can be seen, in a further step, the lower housing part 1 of the storage housing 13 is then on the already in connection with 3 described screws 24 and associated screw bushings 23 screwed together with the respective, outside of the storage housing 13 or underside of the respective laterally corresponding side skirts 22 extending crash elements 27 underside of the floor assembly. In each case, however, it can be seen that the respective crash elements 27 are formed separately from the respective laterally associated side skirts 22 and the housing part 1 of the accumulator housing 13 or are designed as a separate component. This also means in particular that the crash elements 27 can be removed separately from the accumulator housing 13 or the housing lower part 1 and the corresponding lateral side skirts 22 in each case, for example in order to subsequently remove or open the accumulator housing 13 or its housing lower part 1.

7 shows an alternative embodiment of the energy storage floor assembly in respective sectional views along a respective sectional plane running in the vertical direction of the vehicle or in the longitudinal direction of the vehicle 6 , where here - like this from the left representation of 7 is recognizable - first the storage housing 13 or its lower housing part 1 via the respective screws 24, which are screwed into the corresponding screw bushings 23 on the side of the respective side sill 22, is releasably attached to the underside of the floor assembly.

Only after the lower housing part 1 or the storage housing 13 has been attached as a whole then takes place--as can be seen from the middle illustration in FIG 7 it is clear that the crash element 27 associated at the side is installed in the installation direction of the arrow 40. With regard to the fixing of the crash elements 27, reference is made to the attachment according to FIG 6 or according to 5c referenced, according to which screws 49 interact with corresponding screw receptacles 35. The right-hand representation of FIG 7 attachment of the crash element 27 analogously to the embodiment according to FIG 5c , It being particularly clear that the crash element 27 on associated side skirts 22 is attached, but not on the lower housing part 1 of the accumulator housing 13.

In both embodiments, which in connection with 6 and 7 have been explained, the crash elements 27 can be removed for assembly and, in particular, disassembly before the lower housing part 1 or the accumulator housing 13 is disassembled as a whole. In the present exemplary embodiment, the crash elements 27 are designed in particular as extruded profiles made from an aluminum alloy. However, a design as steel profiles, in particular made of high-strength steel, would also be conceivable. By suitably selecting the cross sections of the hollow chambers and the wall thicknesses of the respective chamber walls, the respective crash profile 27 can easily be adapted to different construction variants and dimensions or weights of the respective vehicles.

8th finally shows a partial bottom view of the energy storage floor assembly. It is particularly evident here that the respective crash element 27 does not require any recesses for respective support arms 46 of a lifting platform 47 at its outer corners 45, which are supported from below with respective plates 48 on corresponding jack receptacles arranged on the underside of the side skirts 22. Since the crash elements 27 run on top of the support arms 46, after loosening the screw nuts 43 or the screws 49, they can easily be removed outwards in the transverse direction of the vehicle before the accumulator housing 13 or its lower housing part 1 is then detached.

Reference List

1

housing base

2

sealing flange

3

sealing flange

4

housing top

5

poetry

6

steel frame

7

opening

8th

locking part

9

Aluminum support element

10

steel adapter

11

leg

12

leg

13

storage enclosure

14

crash profile

15

wall area

16

flange

17

profile area

18

flange

19

flange

20

profile part

21

screw connection

22

side skirts

23

screw socket

24

screw

25

disc

26

screw connection

27

crash element

28

recess

29

recess

30

chamber

31

chamber

32

chamber

33

recess

34

nut

35

screw mounts

36

energy storage

37

profile part

38

underbody

39

spacers

40

arrows

41

gap

42

bolt

43

screw nuts

44

openings

45

corners

46

support arms

47

lifting platform

48

jacking points

49

screws

50

screw connection

51

tab

52

screw

53

opening

54

mother

55

inside

56

wall area

57

area of 27

58

vehicle floor

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 3486101 B1 [0002]

Claims (9)

Energy storage floor assembly for an electrically drivable motor vehicle, with a storage housing (13) for accommodating an electrical energy storage device (36), which comprises at least one housing part (1) which, for arranging the storage housing (13), is attached to the underside of a floor assembly (38) of the motor vehicle body respective side sills (22) running in the area of the vehicle outer sides of the underbody (38), and with crash elements (27) running in the area of the side sills (22), characterized in that the respective crash element (27) as from the respective lateral associated side skirts (22) and the at least one housing part (1) of the accumulator housing (13) is formed as a separate and detachable component. Energy storage floor assembly claim 1 , characterized in that the respective crash element (27) is releasably attached to the at least one housing part (1) of the accumulator housing (13) and via the at least one housing part (1) of the accumulator housing (13) to the respective side sill (22) of the underbody ( 38) is connected. Energy storage floor assembly claim 1 , characterized in that the respective crash element (27) is releasably attached to the laterally associated side skirts (22). Energy storage floor assembly claim 2 or 3 , characterized in that the respective crash element (27) is also detachably connected to a component of the accumulator housing (13) arranged behind it in the vehicle transverse direction, in particular a crash profile (14). Energy storage floor group according to one of the preceding claims, characterized in that the respective crash element (27) is designed as an extruded profile, in particular made of an aluminum alloy. Energy storage floor assembly according to one of Claims 1 until 4 , characterized in that the respective crash element (27) is designed as a steel profile, in particular from a high-strength steel alloy. Energy storage floor assembly according to one of the preceding claims, characterized in that a crash profile (14) on the storage housing side is fastened on the inside of the respective crash element (27) on the at least one housing part (1) of the storage housing (13). Energy storage floor assembly claim 7 , characterized in that a gap (41) is formed between the respective crash element (27) and the respective laterally corresponding crash profile (14) of the at least one housing part (1) of the accumulator housing (13). Energy storage floor assembly according to one of the preceding claims, characterized in that respective spacer elements (39) are provided on the crash element (27) for support on the associated side sill (22) or the at least one housing part (1) of the storage housing (13).

Images