Deformation protection arrangement

Abstract

The invention relates to a deformation protection arrangement (7) for an electrical energy storage device (3) arranged on a vehicle floor (2) of a vehicle (1) in the event of a side impact of the vehicle (1), wherein a housing (4) of the electrical energy storage device (3) is fastened with its edge region (R) to the vehicle floor (2) by means of a number of screw connections (6).According to the invention, it is provided that in addition at least one shaped element (8) extending in the vertical direction is arranged and / or formed on a longitudinal side of the edge region (R) of the housing (4) running parallel to a respective side sill (5) of the vehicle (1) along a vehicle vertical axis (z), which shaped element (8) projects at least in sections in a form-fitting manner with a counter-contour (A) corresponding to the shaped element (8) in the vehicle floor (2) at least for the partial absorption of collision forces caused by a side impact, or the shaped element (8) extending in the vertical direction is arranged and / or formed on the vehicle floor (2), which shaped element (8) projects at least in sections in a form-fitting manner with a counter-contour (A) corresponding to the shaped element (8) in the housing (4) at least for the partial absorption of collision forces caused by a side impact.

Description

[0001] The invention relates to a deformation protection arrangement for an electrical energy storage device arranged on a vehicle floor of a vehicle in the event of a side impact of the vehicle, wherein a housing of the electrical energy storage device is fastened with its edge region to the vehicle floor by means of a number of screw connections.

[0002] US Pat. No. 11,876,239 B2 discloses a protective mount for an electrical energy storage device of a vehicle in the event of a side impact. The protective mount is designed to allow displacement of the electrical energy storage device in the direction of a transverse vehicle axis.

[0003] The invention is based on the object of specifying a deformation protection arrangement for an electrical energy storage device of a vehicle.

[0004] The object is achieved according to the invention by a deformation protection arrangement which has the features specified in claim 1.

[0005] Advantageous embodiments of the invention are the subject of the subclaims.

[0006] A deformation protection arrangement for an electrical energy storage device arranged on a vehicle floor of a vehicle in the event of a side impact of the vehicle, wherein a housing of the electrical energy storage device is fastened to the vehicle floor with its edge region by means of a number of screw connections, provides according to the invention that in addition at least one shaped element extending in the vertical direction is arranged and / or formed on a longitudinal side of the edge region of the housing, which longitudinal side runs parallel to a respective side sill of the vehicle, along a vehicle vertical axis, which shaped element projects at least in sections in a form-fitting manner with a counter contour corresponding to the shaped element in the vehicle floor at least for the partial absorption of collision forces caused by a side impact.Alternatively, the shaped element extending in the vertical direction is arranged and / or formed on the vehicle floor, which at least partially projects into the housing in a form-fitting manner with a counter-contour corresponding to the shaped element, at least for the partial absorption of collision forces caused by a side impact.

[0007] By means of a deformation arrangement designed in this way, a composite structure is formed comprising the electrical energy storage device and the vehicle floor, which essentially remains intact even when transverse forces act on the vehicle and the vehicle floor. This formed composite structure thus participates as a whole in a side collision and / or compression. If the vehicle floor is compressed, the electrical energy storage device participates in such a movement. Since the vehicle is largely always involved in force introduction and transmission as well as energy absorption, deformations in the housing of the electrical energy storage device can be reduced. This can reduce the risk of damage to individual cells arranged in an individual cell receptacle of the housing, thereby significantly reducing the risk of thermal runaway of an individual cell and thus the risk of thermal propagation in the housing.

[0008] Since the electrical energy storage unit and the vehicle floor form a common structural element, the electrical energy storage unit and the vehicle floor can be realized with less material in terms of a desired deformation behavior, which can result in a low vehicle weight and thus also lower costs.

[0009] Embodiments of the invention are explained in more detail below with reference to drawings.

[0010] Showing: Fig. 1 schematically shows a side view of a vehicle with an electrical energy storage device arranged on the vehicle floor, Fig. 2 schematically shows a front view of the vehicle with the electrical energy storage device arranged on the vehicle floor, Fig. 3 schematically shows a section of a fastening arrangement for fastening the electrical energy storage device to a vehicle floor and Fig. 4 schematically shows a section of a vehicle with an electrical energy storage device attached by means of the fastening arrangement during a side collision.

[0011] Corresponding parts are provided with the same reference numerals in all figures.

[0012] The Fig. 1 and Fig. 2 each show a perspective view of a vehicle 1 with an electrical energy storage device 3, in particular a traction battery, attached to the vehicle floor 2. Fig. 1 a side view and Fig. 2 a front view of the vehicle 1 with the electrical energy storage unit 3.

[0013] The electrical energy storage device 3 has a housing 4 with a single-cell receptacle, in which a plurality of electrically interconnected individual cells (not shown in detail) are arranged. The housing 4 has a circumferential, laterally collar-shaped protruding edge region R, via which the electrical energy storage device 3 is arranged on the vehicle floor 2, in particular screwed thereto, as shown by way of example in Fig. 3. The electrical energy storage device 3 is arranged between two side sills 5 of a vehicle body shell running parallel to a vehicle longitudinal axis x and is fastened to the vehicle floor 2.

[0014] An interface between the electrical energy storage device 3 and the vehicle floor 2 is formed by a comparatively large, horizontal and flat surface. Forces, particularly those resulting from longitudinal and / or lateral acceleration and / or a collision and / or compression, acting parallel to this interface on the housing 4 of the electrical energy storage device 3, are transmitted by frictional engagement.

[0015] In the event of a side collision and / or lateral compression of the vehicle 1, the side sills 5, in particular their structures, are often the first to deform. Furthermore, the electrical energy storage device 3, with its comparatively rigid housing 4, moves relative to a collapsing vehicle structure, subjecting the screw connections 6 by means of which the electrical energy storage device 3 is attached to the vehicle floor 2 to shear stress. Since screws can hardly transmit transverse forces, the screw connection 6 can fail, so that the electrical energy storage device 3 is isolated from the vehicle floor 2 in sections or over a large area.

[0016] It follows that side impact-induced transverse forces F, i.e. collision forces, are introduced directly into the housing 4 of the electrical energy storage device 3, causing the housing 4 to deform.

[0017] Structural elements, in particular stiffening elements, in the vehicle floor 2 no longer participate in force introduction and thus in energy absorption, so that only the housing 4 is subject to relatively strong deformations. Such strong deformations of the housing 4 of the electrical energy storage device 3 can lead to unacceptably strong deformations of the individual cells arranged in the individual cell receptacle of the housing 4, thereby significantly increasing the risk of thermal runaway of an individual cell and the associated thermal propagation.

[0018] To counteract this thermal runaway and thermal propagation caused, for example, by a side collision, a Fig. 3 and Fig. 4 shown deformation protection arrangement 7 is provided for the electrical energy storage device 3.

[0019] Fig. 3 shows a sectional view of a section of the deformation protection arrangement 7 and Fig. 4 shows a partially transparent section of the vehicle 1 with the electrical energy storage device 3 during a side collision.

[0020] The deformation protection arrangement 7 comprises a shaped element 8, which is arranged and / or formed on a longitudinal side of the edge region R of the housing 4, which runs parallel to a respective side sill 5 of the vehicle 1, and is directed upwards along a vehicle vertical axis z. In particular, the housing 4 and the shaped element 8 are formed as a single component.

[0021] The vehicle floor 2 has a counter contour A, in particular a recess, corresponding to a position of the shaped element 8, the shape of which corresponds to a shape of the shaped element 8.

[0022] During normal operation of the vehicle 1, the shaped element 8 protrudes at least partially into the counter contour A in a form-fitting manner.

[0023] In one possible embodiment, the shaped elements 8 extend in a strip-like manner over the entire respective longitudinal side of the edge region R of the housing 4, wherein for this purpose a corresponding counter contour A with a corresponding length is formed in the vehicle floor 2.

[0024] Also, several local shaped elements 8 can be formed on the respective longitudinal side of the edge region R of the housing 4, which are formed, for example, at regular intervals on the edge region R.

[0025] In this case, the shaped elements 8 are formed in particular outside a region of a respective screw connection 6, wherein the respective screw connection 6 is arranged in particular between the single cell receptacle of the housing 4 and the respective shaped element 8, as in Fig. 3 is shown in more detail.

[0026] It is also conceivable to integrate the screw connection 6 into the single-cell receptacle of the housing 4. The respective screw connection 6 is arranged between the shaped elements 8, i.e., spaced from a lateral force in the event of a collision of the vehicle 1.

[0027] In the event of a side collision or another circumstance from which transverse forces F acting laterally on the vehicle 1, i.e. forces acting in the direction of a vehicle transverse axis y, for example collision forces, result, these are introduced into the shaped elements 8 and thus into the vehicle floor 2 by a composite formed, in particular, by the form fit between the electrical energy storage device 3 and the vehicle floor 2, as shown by way of example and in a greatly simplified manner in Fig.4. When the vehicle floor 2 is compressed, the electrical energy storage device 3 moves with the vehicle floor 2, whereby deformations in the housing 4 of the electrical energy storage device 3 can be reduced because the vehicle 1 participates in force introduction and force transmission as well as in energy absorption. The connection between the electrical energy storage device 3 and the vehicle floor 2 therefore significantly reduces the risk of deformation of the housing 4 of the electrical energy storage device 3, which also reduces the risk of deformation for the individual cells in the housing and thus the risk of thermal runaway based on an individual cell and the risk of thermal propagation.Due to the positive connection between the shaped elements 8 and the vehicle floor 2, it can be largely avoided that the screw connections 6 between the housing 4 and the vehicle floor 2 are subjected to shear stress and the electrical energy storage device 3 thus remains largely on the vehicle floor 2. List of reference symbols 1 vehicle 2 Vehicle floor 3 electrical energy storage 4 housings 5 sills 6 Screw connection 7 Deformation protection arrangement 8 Form element A Counter contour F shear force R edge area x Vehicle longitudinal axis y vehicle transverse axis z Vehicle vertical axis QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] US 11,876,239 B2

[0002]

Claims

[1] Deformation protection arrangement (7) for an electrical energy storage device (3) arranged on a vehicle floor (2) of a vehicle (1) in the event of a side impact of the vehicle (1), wherein a housing (4) of the electrical energy storage device (3) is fastened with its edge region (R) to the vehicle floor (2) by means of a number of screw connections (6), characterized by , that - in addition, at least one shaped element (8) extending in the vertical direction is arranged and / or formed on a longitudinal side of the edge region (R) of the housing (4) running parallel to a respective side sill (5) of the vehicle (1) along a vehicle vertical axis (z), which shaped element (8) projects at least partially into the vehicle floor (2) in a form-fitting manner with a counter-contour (A) corresponding to the shaped element (8), at least for the partial absorption of collision forces caused by a side impact, or - the shaped element (8) extending in the vertical direction is arranged and / or formed on the vehicle floor (2), which at least partially projects into the housing (4) in a form-fitting manner with a counter-contour (A) corresponding to the shaped element (8), at least for the partial absorption of collision forces caused by a side impact. [2] Deformation protection arrangement (7) according to claim 1, characterized by that a respective screw connection (6) of the housing (4) is arranged between the at least one shaped element (8) of one vehicle side and the at least one shaped element (8) of another vehicle side. [3] Deformation protection arrangement (7) according to claim 1 or 2, characterized by that the respective at least one shaped element (8) extends over an entire length of the longitudinal side of the edge region (R) of the housing (4) and the counter contour (A) is formed correspondingly on the vehicle floor (2).

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