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DE-102024003719-A1 - Protective arrangement for an electrical energy storage device of a vehicle and vehicle

DE102024003719A1DE 102024003719 A1DE102024003719 A1DE 102024003719A1DE-102024003719-A1

Abstract

The invention relates to a protective arrangement for an electrical energy storage device (1) of a vehicle, wherein the electrical energy storage device (1) comprises a housing (2) with a housing cover (3) and a number of electrically interconnected individual cells (4) arranged in the housing (2). According to the invention, it is provided that at least one stiffening element (8, 11) reinforcing this area of the longitudinal side is arranged in at least one region of at least one longitudinal side of the housing (2) of the electrical energy storage device (1).

Inventors

  • Sebastian Vaupel
  • Meenakumari Lakshman

Assignees

  • Mercedes-Benz Group AG

Dates

Publication Date
20260513
Application Date
20241113

Claims (10)

  1. Protective arrangement for an electrical energy storage device (1) of a vehicle, wherein the electrical energy storage device (1) has a housing (2) with a housing cover (3) and a number of electrically interconnected individual cells (4) arranged in the housing (2), characterized in that at least one stiffening element (8, 11) reinforcing this area of the longitudinal side is arranged in at least one region of at least one longitudinal side of the housing (2) of the electrical energy storage device (1).
  2. Protection order according to Claim 1 , characterized in that the at least one stiffening element (8, 11) is designed as an extruded profile and/or as a die-cast profile and corresponds to an outer shape of the housing (2) and/or the housing cover (3).
  3. Protection order according to Claim 1 or 2 , characterized in that at least the stiffening element (8) extends over a predetermined area of an edge region (R) of the longitudinal side of the housing (2) and at least the further stiffening element (11) extends over a predetermined area of an edge region (R) of the longitudinal side of the housing cover (3), so that the stiffening elements (8, 11) are at least partially opposite each other.
  4. Protection order according to Claim 3 , characterized in that the housing (2) and/or the housing cover (3) are designed such that a frame element (9) extending between the edge region (R) of the housing (2) and the edge region (R) of the housing cover (3) is arranged centrally for fastening the electrical energy storage device (1) to a vehicle floor (F) with respect to a height of the housing (2) with housing cover (3).
  5. Protection order according to Claim 4 , characterized in that a sill (10) of the vehicle, to which the electrical energy storage device (1) is attached by means of the frame element (9), is designed with an enlarged cross-section.
  6. Protection order according to Claim 4 or 5 , characterized in that at least one screw point for screwing the housing cover (3) to a vehicle component is formed in the edge area (R) of at least the housing cover (3).
  7. Protection order according to Claim 6 , characterized in that at least one screw point is designed for screwing at least the housing cover (3) to a seat cross rail (12) of the vehicle.
  8. Protection order according to Claim 7 , characterized in that a screw (13) screwed into the screw point extends through the edge region (R) of the housing cover (3) with the further stiffening element (11), a cell holder (6) for holding and positioning the individual cells (4) and through the edge region (R) of the housing (2) with the stiffening element (8) and is screwed to the seat cross rail (12).
  9. Protective arrangement according to one of the preceding claims, characterized in that a respective longitudinal axis of the longitudinal sides of the housing (2) runs in the direction of a vehicle longitudinal axis and/or parallel to the housing cover (3).
  10. Vehicle with a protective arrangement for an electrical energy storage device (1), wherein the protective arrangement is designed according to one of the preceding claims.

Description

The invention relates to a protective arrangement for an electrical energy storage device of a vehicle, wherein the electrical energy storage device has a housing with a housing cover and a number of electrically interconnected individual cells arranged in the housing. From the EP 2 418 709 A1 A battery pack is known that comprises a plurality of battery elements packed side by side in a packing layer. Within the packing layer, a deformation element is arranged between two adjacent battery elements. The battery elements are displaceable under the influence of an external force, deforming the deformation element. Furthermore, the US 2016/0233464 A1 A housing for a vehicle's traction motor battery, featuring multiple shock-absorbing elements on its exterior. These elements consist of an arcuate or partially cylindrical wall and a flat wall that defines a partially cylindrical pocket. Upon impact, the arcuate wall collapses towards the flat wall to absorb the impact force. Furthermore, from the DE 20 2016 100 629 U1 A housing for a traction motor battery for an electric vehicle is known. The housing comprises several inner walls, which are attached to one another over several sides of the traction motor battery, and several outer walls. Furthermore, the housing comprises several cylindrical, tubular, shock-absorbing components, which contain several internal reinforcing walls, wherein the shock-absorbing components are attached to one of the inner walls and to one of the outer walls. The invention is based on the objective of providing a protective arrangement for an electrical energy storage device for a vehicle and a vehicle. The problem is solved according to the invention by a protective arrangement having the features specified in claim 1 and by a vehicle having the features specified in claim 10. Advantageous embodiments of the invention are the subject of the dependent claims. A protective arrangement for an electrical energy storage device of a vehicle, wherein the electrical energy storage device has a housing with a housing cover and a number of electrically interconnected individual cells arranged in the housing, provides according to the invention that in at least one area of at least one longitudinal side of the housing of the electrical energy storage device at least one stiffening element reinforcing this area of the longitudinal side is arranged. By means of this at least one stiffening element, deformation of the housing and the resulting damage to individual cells within the housing, particularly in the event of a side collision of the vehicle, can be significantly reduced. The at least one stiffening element increases the stability and overall stiffness of the electrical energy storage system. In particular, the at least one stiffening element largely eliminates the risk of critical damage to the cell housing of individual cells, thus significantly reducing the risk of outgassing from the individual cells and the potential thermal runaway of these cells. For example, the at least one stiffening element forms a so-called encasement of the area in which it is located. In one embodiment, at least one stiffening element is designed as an extruded profile and/or a die-cast profile and corresponds to an external shape of the housing and/or the housing cover. The at least one stiffening element thus rests almost entirely against the housing and/or the housing cover in a form-fitting manner, is in particular attached to the housing and/or the housing cover, and thereby stiffens this area. This reduces deformation of the housing and/or the housing cover, thus providing optimized protection for the individual cells within the housing. In particular, the at least one stiffening element absorbs collision-related loads acting on the electrical energy storage device and distributes these loads essentially uniformly into the housing and, if applicable, the individual cells, so that only minimal to no load peaks act on the electrical energy storage device, especially the individual cells within the housing. In a further embodiment of the protective arrangement, at least one stiffening element extends over a predetermined area of an edge region on the longitudinal side of the housing, and at least one further stiffening element extends over a predetermined area of an edge region on the longitudinal side of the housing cover, such that the stiffening elements are at least partially opposite each other. By means of The stiffening element, at least in the area where it is located, is stiffened and stabilized, thus reducing deformation of the housing, particularly in the event of a side collision. This significantly reduces the risk of damage to individual cells within the housing, thereby also mitigating health risks to living beings in the immediate vicinity of the electrical energy storage device. In one possible embodiment, the housing and/or the housing cover is designed such that a frame element, extending