CN113246706A

CN113246706A - Attachment device for providing traction for a vehicle, in particular an electric vehicle, i.e. an electric energy source for driving the vehicle

Info

Publication number: CN113246706A
Application number: CN202110137223.2A
Authority: CN
Inventors: 马吕斯·萨瓦茨基; 丹尼尔·梅肯施托克; 迈克尔·斯柏林; 马丁·萨尔茨-布劳尔
Original assignee: Ford Global Technologies LLC
Current assignee: Ford Global Technologies LLC
Priority date: 2020-02-09
Filing date: 2021-02-01
Publication date: 2021-08-13
Also published as: DE102020103239B3

Abstract

The invention relates to an attachment device (10) for an electrical energy source (34) for providing traction for a vehicle, i.e. driving a vehicle, preferably an electric vehicle, which may be arranged below a vehicle floor (38) between vehicle sills (32) of the vehicle. The attachment device (10) has a housing (12) that houses and secures an electrical energy source (34). According to the invention, the attachment device (10) comprises a plurality of shell-side attachment elements (18) which are permanently connected to the shell (12) and a plurality of sill-side attachment elements (26) which can be permanently connected to one of the sills (32). The attachment element (18, 26) has first and second planar abutment surfaces (20). In the mounted state, each housing-side attachment element (18) is connected to one of the rocker-side attachment elements (26) such that the first planar abutment surface (20) of each housing-side attachment element (18) is oriented parallel to the second planar abutment surface (28) of one of the rocker-side attachment elements (26).

Description

Attachment device for providing traction for a vehicle, in particular an electric vehicle, i.e. an electric energy source for driving the vehicle

Technical Field

The present invention relates to an attachment arrangement for a source of electrical energy for providing tractive force to a vehicle, i.e. driving a vehicle, preferably an electric vehicle, according to the preamble of claim 1.

Background

The field of motor vehicle engineering is known to include motor vehicles whose main drive comprises an electric drive system with an electric motor which can be operated by means of an electric current generated by an electric energy source, such as an electrochemical energy store or an energy converter. The electrochemical energy store or the energy converter can be formed here, for example, by at least one rechargeable battery (often also referred to somewhat imprecisely as a traction battery) or a fuel cell stack ("stack").

In motor vehicles with conventional internal combustion engines, the arrangement ("packaging") of the various components (drive, chassis, body) of the motor vehicle has matured over decades of development. In motor vehicles (also referred to below as electric vehicles) in which an electrochemical energy store or an energy converter is used as an electrical energy source for the traction drive, the external dimensions of the motor vehicle and the connections to other components differ to a large extent from motor vehicles having a conventional internal combustion engine, since in electric vehicles, box-shaped traction cells or fuel cell stacks must generally be arranged on large vehicle floors. Therefore, electric vehicles require different solutions to arrange components within the motor vehicle in order to ensure the safety of the vehicle in the event of a collision.

Due to the amount of energy that can be stored in rechargeable batteries, there is a higher demand for mechanical integrity in the event of a crash to prevent sudden release of the stored amount of energy.

To meet the existing demand for higher energy storage density of rechargeable batteries, the batteries of future traction batteries or fuel cell vehicles, such as plug-in hybrid electric vehicles ("PHEVs") or hybrid electric vehicles ("HEVs"), do not contain any internal load bearing structures or do not provide through holes for screw positioning. In addition, the available space around rechargeable batteries available for energy absorbing structures is becoming smaller and smaller. As a result, the housing of the rechargeable battery is required to be non-deformable during a crash event because it is not feasible to provide space inside the housing to compensate for deformation without damaging the battery pack housed in the housing. Thus, the only possible attachment point is at the outer edge of the battery case.

Various solutions have been proposed in the prior art to ensure compliance with existing safety regulations and safety protocols, in particular with respect to the safety of vehicles in the event of a crash event (crash safety), for example as part of the european new vehicle assessment program (Euro NCAP) issued by the european ministry of transportation, the automotive association and the insurance association.

For example, US 9,505,442B 2 discloses an energy absorbing sill device. The rocker device includes a vehicle rocker on one side of the vehicle and a battery rocker on one side of a battery pack of the vehicle. The energy absorbing method includes applying a first portion of a mechanical lateral load through a first load path extending through a vehicle sill on one side of the vehicle and applying a second portion of a mechanical lateral load through a second load path extending through a battery sill on one side of the battery pack.

The vehicle door sill and the battery door sill absorb energy during a collapse process, wherein the vehicle door sill and the battery door sill can cooperate at least partially independently of each other. In the event of an impact from an external obstacle, the battery door sill provides a direct and independent load path between the battery pack and the obstacle, which may be substantially configured for additional loads due to strong battery inertia. The independent load path between the battery pack and the barrier may prevent the barrier from directly applying force to the battery pack without the need for an insert (e.g., a foam inlay, a nylon insert, a weld, etc.) on the vehicle sill.

US 9,809,101B 2 proposes a vehicle battery mounting structure including: an energy absorbing member that is provided on a vehicle body lower side of the floor panel and includes a first side wall portion that rises to an upper outer side of the vehicle body in a vehicle width direction on an inner side of the energy absorbing member when viewed from a length direction of the vehicle body; a battery frame made of plastic, the battery frame being arranged in the first side wall portion in the width direction of the vehicle and fastening the battery, and having a second side wall portion that rises to an upper outer side of the vehicle body outside the battery frame in the width direction of the battery pack when viewed from the longitudinal direction of the vehicle body, wherein the second side wall portion faces the first side wall portion when viewed from the width direction of the vehicle.

Side impacts cause the outer regions of the floor to bend upward. It is thereby possible to avoid a situation in which the first side wall portion of the energy-absorbing member comes into linear contact with the second side wall portion of the battery frame during a side collision of the vehicle. As a result, it is possible to prevent a locally limited collision load from being applied to the battery.

Furthermore, US 10,207,574B 2 describes a motor vehicle which has side sills which are arranged in pairs on the right and left sides of the motor vehicle and have a pocket-shaped cross section when viewed from the front side of the motor vehicle, and which has a floor which forms the bottom of at least one passenger compartment and is connected to the side sills. The motor vehicle further includes a panel that is disposed below the base plate so as to support the battery, and that is connected to the side sill. The motor vehicle further comprises a mechanism for allowing the battery to move. The mechanism allows the battery to move in the direction of the inner side of one of the side sills if the battery moves relative to the opposite side in the width direction of the vehicle in a side collision, for example. Therefore, the battery applies a load to the side sill opposite to the collision point. At least one inner side portion of the rocker is configured such that the battery presses the side portion into the passenger compartment of the rocker.

In view of the indicated prior art, there is still room for improvement in the field of attachment devices for electrical energy sources for providing traction for electric vehicles.

Disclosure of Invention

The object of the present invention is to provide an attachment device for an electrical energy source for providing traction for an electric vehicle, which attachment device has as little adverse effect as possible on the installation space of the electrical energy source between the side sills of the electric vehicle and at the same time limits the magnitude of the forces acting on the electrical energy source or the torque acting on the electrical energy source in the event of a side impact event of the electric vehicle in order to maintain the mechanical integrity of the electrical energy source.

In this case, the electrical energy source can be designed as an energy store (e.g. a rechargeable battery) and/or as an energy converter (e.g. at least one fuel cell stack). In this application, the common term "battery" or "drive battery" is also used as a synonym for electrical energy storage. Likewise, electric vehicles are mentioned in the following, but the term is not intended to constitute a limitation of purely electric vehicles. But includes all vehicles that use a battery to store driving energy, i.e., a plug-in hybrid electric vehicle (PHEV) or a Hybrid Electric Vehicle (HEV) or a vehicle with a fuel cell (the battery may act as a buffer).

According to the invention, this object is achieved by an attachment device having the features of claim 1. Further particularly advantageous developments of the invention are disclosed in the dependent claims.

It should be noted that the features and measures specified individually in the following description can be combined with one another in any desired technically meaningful way and further refinements of the invention are disclosed. The specification additionally describes and illustrates the present invention, particularly with reference to the accompanying drawings.

The inventive attachment device for an electrical energy source which provides traction for an electric vehicle and can be arranged under the vehicle floor between the door sills of the electric vehicle has a housing for accommodating and fixing the electrical energy source. In this case, the attachment means includes a plurality of case-side attachment members and a plurality of sill-side attachment members.

The attachment element of the plurality of housing-side attachment elements is permanently connected to the housing and each housing-side attachment element has a first planar abutment surface which, in the mounted state, can be considered as a part of a virtual plane inclined downwards from the housing.

The attachment element of the plurality of sill-side attachment elements may be permanently connected to one of the sills and each sill-side attachment element has a second planar abutment surface.

In this case, in the mounted state, each of the shell-side attachment elements is connected to one of the sill-side attachment elements such that the first abutment surface of each of the shell-side attachment elements is oriented parallel to the second abutment surface of one of the sill-side attachment elements.

In the event of a side impact event, with the proposed attachment device, the impact energy can be used to move the electrical energy source in a targeted manner downwards out of the force application path starting from one of the electric vehicle sills and pointing towards the center of the vehicle. The first planar abutment surface may interact with the second planar abutment surface to cause a downward movement of the housing and the electrical energy source fixed therein according to the inclined plane principle. At the same time, the electrical energy source can be securely fixed to the body of the electric vehicle by means of a plurality of attachment elements.

By means of the proposed attachment device, the electrical energy source can be protected from impact forces during a side impact event, which impact forces may destroy the mechanical integrity of the housing and the electrical energy source contained therein.

For example, at least one rechargeable battery or at least one fuel cell stack may be used as an electrical energy source.

The terms "first", "second", and the like, as used herein, are for distinguishing purposes only. In particular, their use is not intended to imply any order or priority for the objects specified in connection with these terms. The term "plurality" is to be understood within the scope of the present invention in particular as a number of at least two.

In a preferred embodiment of the attachment device, each of the case-side attachment members is connected to one of the rocker-side attachment members in a mounted state such that the first abutment surface of each of the case-side attachment members and the second abutment surface of one of the rocker-side attachment members at least partially abut against each other. As a result, it can be ensured in a structurally particularly simple manner that, in the event of a side impact event, the first planar abutment surface interacts with the second planar abutment surface in order to cause a downward movement of the housing and of the electrical energy source fixed therein.

The first and second planar abutment surfaces may preferably be configured as form-fitting locking elements corresponding to each other. For example, the first planar abutment surface may be part of a longitudinal groove, while the second planar abutment surface may be part of a slider movable in the longitudinal groove.

The first planar abutment surface of each housing-side attachment element is preferably oriented perpendicularly with respect to an imaginary plane arranged perpendicularly with respect to the straight-line direction of the electric vehicle. As a result, the energy of the crash event can be utilized in a particularly effective manner by the shell-side attachment element and the sill-side attachment element to cause downward movement of the shell and the electrical energy source fixed therein.

In a preferred embodiment of the attachment device, the second planar abutment surface of each sill-side attachment element lies in a virtual plane which does not intersect the housing. In this way, in the event of a crash event, a particularly large stroke of the downward movement of the housing can be achieved, since the sill-side attachment element does not risk colliding with the housing during the inward movement.

The respective first planar abutment surface of the at least one housing-side attachment element may be considered to be a part of a virtual plane inclined downwards from the housing and forms an angle of inclination of between 20 ° and 50 ° with a horizontal virtual plane passing through the highest point of the first planar abutment surface. As a result, the tilt angle may be selected in accordance with the spatial conditions present in the particular application, which tilt angle allows for a downward movement of the housing and the electrical energy source fixed therein, in the event of a crash event, to be effectively caused by the housing-side attachment element and the sill-side attachment element.

In a preferred embodiment of the attachment device, in the first abutment face of the at least one housing-side attachment element and in the second abutment face of the at least one sill-side attachment element, an elongate through-hole is formed in the respective attachment element. In this case, the connection of at least one of the housing-side attachment elements to one of the sill-side attachment elements is realized by at least one threaded attachment, wherein a bolt element or a screw element engages through the longitudinal through hole.

As a result, in the event of a crash event, a guided reliable relative movement of the housing-side attachment element and the sill-side attachment element can be produced in a particularly simple manner in order to bring about a downward movement of the housing and of the electrical energy source fixed therein.

The elongated through holes are preferably arranged with their relatively long symmetry axes lying in an imaginary plane arranged perpendicularly with respect to the straight direction.

In such an elliptical hole connection, at least one predetermined breaking member is arranged in at least one of the longitudinal through holes of the shell-side attachment member and the sill-side attachment member, the predetermined breaking member being provided for maintaining the connection between the shell-side attachment member and the sill-side attachment member in the event that a force acting transversely on the sill-side attachment member is below a predetermined threshold value, and for releasing the connection between the shell-side attachment member and the sill-side attachment member in a direction parallel to the longitudinal through hole in the event that a force acting transversely on the sill-side attachment member is above the predetermined threshold value, thereby making it possible to move the shell and the electrical energy source fixed therein downwards.

The term "provided for this purpose" is intended to be understood in the context of the present invention to mean in particular a design or an arrangement specifically designed for this purpose.

By means of the first predetermined breaking element, in the event of a side impact event, a downward movement of the housing and the electrical energy source fixed therein can be triggered at a predetermined level of inward force, which is initiated by one of the door sills, so that a particularly precisely defined application of the downward movement of the housing can be carried out.

It is obvious to the person skilled in the art that the use of a predetermined breaking element is not absolutely necessary for the proposed attachment arrangement, since there are other possible ways by which the connection between the housing-side attachment element and the sill-side attachment element can be released above a predetermined threshold in a direction parallel to the longitudinal through hole. For example, the connection between the shell-side attachment element and the sill-side attachment element may be realized solely by a threaded connection, i.e. by a frictional engagement (non-form-fitting engagement). Thus, the predetermined threshold value may be set by the tightening torque of the threaded connection.

In a preferred embodiment of the attachment device, in the region in which the end facing away from the housing adjoins the first abutment face of each housing-side attachment element, the distance between the housing-side attachment element and the sill-side attachment element is greater than the distance between the first abutment face of the respective housing-side attachment element and the second abutment face of the respective sill-side attachment element in the region thereof.

In this way, it is possible to prevent the affected rocker in the event of a side impact event from colliding with one of the housing-side attachment elements when moving inward. As a result, in the event of a crash event, an increased travel of the downward movement of the housing can be caused, which moves the electrical energy source particularly safely downward out of the force application path starting from the affected rocker and pointing toward the center of the vehicle.

At least one of the case-side attachment elements and/or at least one of the sill-side attachment elements is preferably made of a metal plate. As a result, a solution for attaching the element which is particularly simple in terms of production technology can be provided. For example, the attachment element may be made of a metal plate by bending forming.

A high degree of stability of the attachment element can be achieved if the at least one shell-side attachment element and/or the at least one sill-side attachment element made of sheet metal is substantially in the form of a triangular contour.

The triangular profile may also preferably have incompletely configured sides. In this case, a sufficiently high stability can be achieved with a particularly low weight.

In the context of the present invention, the term "substantially in the form of a triangular profile" is to be understood as meaning in particular that the absolute value of the cross-sectional area of the profile (in particular the area comprising the through-openings) deviates by less than 20%, preferably by less than 15%, particularly preferably by less than 10%, from the absolute value of the smallest triangle which surrounds the profile.

Drawings

Fig. 1 shows a schematic cross-sectional view of a conventional attachment of an electrical energy source for providing traction to an electric vehicle in a mounted state in a cross-section perpendicular to the straight direction. Further advantageous embodiments of the invention are disclosed in the dependent claims and in the following description of the drawings, in which:

fig. 2 shows a schematic cross-sectional view of an attachment arrangement for an electrical energy source for providing traction to an electric vehicle according to the invention in a mounted state in a cross-section perpendicular to the straight direction;

fig. 3 shows a detailed view of a part of the attachment device according to fig. 2 in a mounted state;

FIG. 4 shows a detailed view of a portion of the attachment arrangement according to FIG. 2 in the event of a side impact event; and

fig. 5 shows a detailed view of a possible embodiment of the attachment element of the attachment device according to fig. 2.

In the different figures, identical parts always have the same reference numerals and are therefore usually also described only once. As already explained above, the electrical energy source may be embodied as an energy store (e.g. a rechargeable accumulator) and/or as an energy converter (e.g. at least one fuel cell stack). Therefore, hereinafter, the common terms "battery" or "drive battery" are also used as synonyms for the electrical energy storage. Likewise, electric vehicles are mentioned in the following, but the term is not intended to constitute a limitation of purely electric vehicles. On the contrary, all vehicles that use a battery to store driving energy (i.e. a plug-in hybrid electric vehicle (PHEV) or a Hybrid Electric Vehicle (HEV) or a vehicle with a fuel cell (the battery may act as a buffer)) are also included.

Detailed Description

Fig. 1 shows a schematic cross-sectional view of a conventional attachment of an electrical energy source EQ for providing traction for an electric vehicle (i.e. driving the electric vehicle) in a cross-section perpendicular to a straight direction GF of the electric vehicle in an installed state.

The electrical energy source EQ can be designed, for example, as a rechargeable battery ("high-power battery", "traction battery"), for example, as a lithium-ion battery. The electric energy source EQ is housed and fixed in a case G disposed below a vehicle floor FB between sills S of the electric vehicle. Due to the stringent requirements on electrical energy storage density, the electrical energy source EQ does not have any externally accessible internal support structures or through-holes through which attachment elements such as screw elements or tow-bars pass, so that the electrical energy source EQ can only be attached to the housing G by external connections. In addition, there is no significant space available for the energy absorbing structure around the electrical energy source EQ.

The housing G has mounting brackets TB on both side walls SW. Each threshold S is provided with a corresponding fastening clip HK on the inner side. On the mounting bracket TB, the housing G is attached to the corresponding threshold S by means of bolted connections B at a small distance from the threshold S.

In the event of a side impact event, the rocker S affected by the impact accelerates in the direction of the housing G. Due to the small distance in the normal installation state, unbraked impact of the threshold S against the side wall SW of the housing G is possible. The mechanical integrity of the casing G and of the electrical energy source EQ housed inside it is therefore seriously compromised.

Fig. 2 shows a schematic cross-sectional view of an attachment device 10 according to the invention for an electrical energy source 34 for providing traction for an electric vehicle in a section perpendicular to the straight direction 36 of the electric vehicle in the mounted state.

The attachment device 10 according to the invention has a housing 12 for accommodating and securing an electrical energy source 34. The housing 12 corresponds to the housing G according to fig. 1 and can be made, for example, from a steel sheet or from a fiber-plastic composite (FKV). The electrical energy source 34 can be designed, for example, as a rechargeable battery ("high-power battery", "traction battery"), for example as a lithium-ion battery.

The electrical energy source 34 is accommodated and fixed in the housing 12 and is arranged, in the mounted state shown in fig. 2, below a vehicle floor 36 between the door sills 32 of the electric vehicle (only the left door sill is shown in fig. 2), at a small distance 16 (in fig. 2, at the bottom) from the respective door sill 32.

Furthermore, the attachment device 10 comprises a plurality of housing-side attachment elements 18, which housing-side attachment elements 18 are permanently connected to the housing 12, for example by a threaded connection or a welded connection. The attachment device 10 further comprises a plurality of sill-side attachment elements 26, which sill-side attachment elements 26 are each permanently connected to one of the sills 32, for example by a threaded connection or a welded connection.

Details of the shell-side attachment element 18 and the sill-side attachment element 26 can be found in fig. 3. In fig. 3, for example, a detailed view of one of the case-side attachment elements 18 and one of the sill-side attachment elements 26 of the attachment device 10 in a mounted state is shown. Hereinafter, one of the case-side attachment elements 18 and one of the sill-side attachment elements 26 are described by way of example.

The housing-side attachment element 18 is made of a metal plate (e.g. steel plate) substantially in the form of a folded plate, for example by bending forming, and is connected to the side wall 14 of the housing 12 outside the corners so that the edges of the folded plate are arranged on top.

The housing-side attachment element 18 has a first planar abutment surface 20 which in the mounted state can be considered as a part of an imaginary plane which is inclined downwards from the side wall 14 of the housing 12. Here, the first abutment surface 20 of the housing-side attachment element 18 is oriented perpendicularly with respect to an imaginary plane which is arranged perpendicularly with respect to the straight direction 36 of the electric vehicle and corresponds to the drawing plane in fig. 3.

An imaginary plane which is inclined downwards from the side wall 14 of the housing 12 and of which the first plane abutment surface 20 of the housing-side attachment element 18 forms a part forms an inclination angle a with a horizontal imaginary plane through the highest point of the first plane abutment surface 18, which in this exemplary embodiment is 35 °, and which according to the invention may be between 20 ° and 50 °.

The sill-side attachment element 26 is made of a metal plate, e.g. a steel plate, substantially in the form of a right-angled triangular profile, e.g. by bending forming, having an incompletely formed side, and is connected to the inner vertical side wall of the sill 32 at one of the short sides (cathetuses) of the triangular profile, so that the long side (hypotenuse) of the triangular profile substantially faces the shell 12.

The rocker-side attachment element 26 has a second planar abutment surface 28. In the mounted state shown in fig. 2, the shell-side attachment element 18 (and thus each of the plurality of shell-side attachment elements) is connected to the sill-side attachment element 26 (and thus to one of the plurality of sill-side attachment elements) such that the first planar abutment surface 20 of the shell-side attachment element 18 is oriented parallel to the second planar abutment surface 28 of the sill-side attachment element 26.

As shown in fig. 3, the connection may be configured such that there is a perpendicular distance (e.g., by a spacer element) between the first planar abutment surface 20 of the shell-side attachment element 18 and the second planar abutment surface 28 of the sill-side attachment element 26. However, the connection may also be configured such that, in the mounted state, the first planar abutment surface 20 of the case-side attachment element 18 and the second planar abutment surface 28 of the rocker-side attachment element 26 partially abut against each other.

Within the first planar abutment surface 20 of the housing-side attachment element 18, an elongated through-hole in the form of an oblong hole is formed, the relatively long axis of symmetry of which lies in a virtual plane that is arranged perpendicularly with respect to the straight direction 36 (i.e., the plane of the drawing in fig. 3). In the second planar abutment surface 28 of the sill-side attachment element 26 there is also an elongated through-hole in the form of an oblong hole, the relatively long symmetry axis of which is arranged parallel to the relatively long symmetry axis of the elongated through-hole of the housing-side attachment element 18.

The connection between the shell-side attachment element 18 and the sill-side attachment element 26 is produced in that a bolt element 30 is passed through the longitudinal through-holes of the two

attachment elements

18, 26 and is screwed at its ends to nuts.

At the edge of the longitudinal through hole of the housing-side attachment element 18, a predetermined breaking element 24 (fig. 5) is arranged, which is configured as a tapered portion having the width of an elliptical hole. The predetermined breaking member 24 is provided to maintain the connection between the case-side attachment member 18 and the rocker-side attachment member 26 (fig. 3) in the case where the force acting on the rocker-side attachment member 26 is below a predetermined threshold value, and to release the connection between the case-side attachment member 18 and the rocker-side attachment member 26 in the direction parallel to the longitudinal through-hole in the case where it is above the predetermined threshold value. Above a predetermined threshold value, therefore, the predetermined breaking element 24 releases the area of the oval hole, which blocks the movement of the bolt element 26 in the mounted state and below the predetermined threshold value, for the movement of the bolt element 30 and thus of the sill-side attachment element 26.

Fig. 4 shows a detailed view of a part of the attachment device 10 according to fig. 2 and 3 in the event of a side impact event (a) which exerts a lateral force 40 on the affected door sill 32 and transmits it to the sill-side attachment element 26 on the respective side of the housing 12. The level of the lateral force 40 causes deformation of the rocker 32, and the rocker 32 moves in the direction of the housing 12 (B). As a result of the applied force 40 exceeding the predetermined threshold value, causing a force to act on one of the predetermined breaking members 24 (fig. 5), the connection between the case-side attachment element 18 and the sill-side attachment element 26 is released in a direction parallel to the elongated through hole (fig. 4). The configuration of the shell-side and sill-

side attachment elements

18, 26 of the attachment device 10 according to the present invention results in a relative displacement (C) thereof along the first and second planar abutment surfaces 20, 28 (fig. 3), and a downward force 42 is applied to the shell 12 via the shell-side attachment element 18 (fig. 4). As a result, the housing 12 and the electrical energy source 35 contained therein undergo downward movement (D). The housing 12 is removed from the force application path and is loaded neither by force nor by torque.

As is apparent from fig. 3, the second planar abutment surface 28 of the sill-side attachment element 26 lies in a virtual plane that does not intersect the housing 12. Therefore, during inward movement of the rocker 32, the rocker-side attachment element 26 does not have any risk of colliding with the housing 12.

Fig. 3 and 4 furthermore show a region 22 adjoining the first planar abutment surface 20 of the shell-side attachment element 18 at the end facing away from the shell 12, in which region 22 the distance between the shell-side attachment element 18 and the sill-side attachment element 26 is greater than the distance between the shell-side attachment element 18 and the sill-side attachment element 26 in the region of the first abutment surface 20 of the shell-side attachment element 18 and the second abutment surface 28 of the sill-side attachment element 26. As is apparent in particular from fig. 4, in the event of a side impact event, during inward movement of the affected rocker 32, no premature impact occurs with one of the housing-side attachment elements 18, so that a considerable stroke downward movement (D) of the housing 12 is possible. In addition, after a side impact event, the housing 12 and the electrical energy source 34 contained therein are also securely fastened by the connection between the housing-side attachment element 18 and the sill-side attachment element 26.

List of reference numerals:

10 attachment device

12 casing

14 side wall

16 distance

18 housing-side attachment element

20 first plane abutting surface

22 region

24 predetermined breaking element

26 sill side attachment element

28 second plane abutment surface

30 bolt element

32 doorsill

34 source of electric energy

36 straight direction

38 vehicle floor

40 force (side direction)

42 force (downward)

Angle of inclination alpha

B bolt connecting piece

EQ electric energy source

FB vehicle floor

G shell

GF straight direction

HK fastening clip

S-shaped doorsill

SW sidewall

TB mounting bracket

Claims

1. An attachment device (10) for an electrical energy source (34), the electrical energy source (34) being intended to provide tractive force for a vehicle, i.e. to drive a vehicle, preferably an electric vehicle, the electrical energy source (34) being arrangeable under a vehicle floor (38) between vehicle sills (32) of the vehicle, the attachment device (10) having a housing (12) for accommodating and securing the electrical energy source (38),

it is characterized by comprising:

-a plurality of housing-side attachment members (18), the housing-side attachment members (18) being permanently connected to the housing (12), and each housing-side attachment member (18) having a first planar abutment face (20), which first planar abutment face (20) in the mounted state can be considered as a part of a virtual plane sloping downwards from the housing (12), and

-a plurality of sill-side attachment elements (26), which sill-side attachment elements (26) are permanently connectable to one of the sills (32), and each sill-side attachment element (26) has a second planar abutment surface (28),

wherein in the mounted state each of the housing-side attachment elements (18) is connected to one of the rocker-side attachment elements (26) such that the first planar abutment surface (20) of each of the housing-side attachment elements (18) is oriented parallel to the second planar abutment surface (28) of one of the rocker-side attachment elements (26).

2. Attachment device (10) according to claim 1,

it is characterized in that the preparation method is characterized in that,

in the mounted state, each of the shell-side attachment elements (18) is connected to one of the rocker-side attachment elements (26) such that the first planar abutment surface (20) of each of the shell-side attachment elements (18) and the second planar abutment surface (28) of one of the rocker-side attachment elements (26) at least partially abut each other.

3. Attachment device (10) according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the first planar abutment surface (20) of each housing-side attachment element (18) is oriented perpendicularly with respect to a virtual plane arranged perpendicularly to a straight direction (36) of the vehicle.

4. Attachment device (10) according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the second planar abutment surface (28) of each rocker-side attachment element (26) lies in a virtual plane that does not intersect the housing (12).

5. Attachment device (10) according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the virtual plane, of which the respective first abutment face (20) of at least one of the housing-side attachment elements (18) can be considered as a part, slopes downwards from the housing (12) and forms an angle of inclination (a) of between 20 ° and 50 ° with a horizontal virtual plane passing through the highest point of the first planar abutment face (20).

6. Attachment device (10) according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

in the first abutment surface (20) of at least one of the housing-side attachment elements (18) and in the second planar abutment surface (28) of at least one of the sill-side attachment elements (26), an elongated through-hole is formed in the respective attachment element (18, 26), and the connection of at least one of the housing-side attachment elements (18) to one of the sill-side attachment elements (26) takes place by means of at least one threaded connection, wherein a bolt element (30) or a screw element (30) engages through the elongated through-hole.

7. Attachment device (10) according to claim 6,

it is characterized in that the preparation method is characterized in that,

at least one predetermined breaking element (24) is arranged in at least one of the longitudinal through-holes of the housing-side attachment element (18) and the sill-side attachment element (26), the predetermined breaking element being provided for maintaining a connection between the housing-side attachment element (18) and the sill-side attachment element (26) in the event that a force acting transversely on the sill-side attachment element (26) is below a predetermined threshold value, and for releasing the connection between the housing-side attachment element (18) and the sill-side attachment element (26) in a direction parallel to the longitudinal through-hole in the event that a force acting transversely on the sill-side attachment element (26) is above the predetermined threshold value.

8. Attachment device (10) according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

in a region (22) adjoining the first planar abutment face (20) of each housing-side attachment element (18) at an end facing away from the housing (12), the distance between the housing-side attachment element (18) and the sill-side attachment element (26) is greater than the distance between the first planar abutment face (20) of the respective housing-side attachment element (18) and the second planar abutment face (28) of the respective sill-side attachment element (26) in the region thereof.

9. Attachment device (10) according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

at least one of the housing-side attachment elements (18) and/or at least one of the sill-side attachment elements (26) is made of a metal plate.

10. Attachment device (10) according to claim 9,

it is characterized in that the preparation method is characterized in that,

at least one of the housing-side attachment elements (18) and/or at least one of the sill-side attachment elements (26) is substantially in the form of a triangular profile.