Motor vehicle with a spacer arranged between a battery device and a body area

Abstract

Motor vehicle (100) with at least one battery device (10) and with at least one spacer (20) which is arranged between the at least one battery device (10) and at least one body area (102) of the motor vehicle (100) and by means of which the at least one battery device (10) is spaced away from the at least one body area (102), wherein the at least one spacer (20) comprises at least one sealing element (60) which seals at least one gap (50), which is at least partially limited by means of the at least one spacer (20) and which extends between the at least one battery device (10) and the at least one body area (102), against an environment (U) of the motor vehicle (100), wherein at least one spacer (20) comprises a plurality of strut elements (40, 42, 44, 46) which extend at least partially over the space (50), wherein the at least one spacer (20) comprises at least one elastomer element (70) which is clamped between at least one strut element (40, 42) of the plurality of strut elements (40, 42, 44, 46) and the at least one body area (102) of the motor vehicle (100), characterized by the fact that that at least one elastomer element (70) exerts a greater contact force on the at least one strut element (40, 42) and the at least one body area (102) than the at least one sealing element (60).

Description

[0001] The invention relates to a motor vehicle with at least one battery device and with at least one spacer, which is arranged between the at least one battery device and at least one body area of ​​the motor vehicle and by means of which the at least one battery device is spaced away from the at least one body area.

[0002] During operation, motor vehicles are subjected to various loads, which are influenced not only by driving speed but also by the road surface, to name just a few examples. These loads include bending moments, torsional moments, and impulse loads, which can be transmitted between adjacent vehicle components, such as battery systems and adjoining body panels. Depending on the intensity of these loads, noises perceived as unpleasant by vehicle occupants can be transmitted into the passenger compartment.

[0003] From DE 10 2010 007 633 A1, a vehicle is known with an electric drive device and an energy storage device arranged in a housing, the energy storage device being formed from several cells, wherein the housing comprises several separating devices such that at least one separating device is positioned between two cells, wherein the housing of the energy storage device is connected to both a cooling air intake duct having an inlet opening and a cooling air outlet duct having an outlet opening. At least one separating device is designed such that several cooling channels are formed between the cells, through which cooling air can flow to cool the energy storage device.

[0004] DE 10 2017 206 586 A1 discloses a battery mounting structure for a vehicle which is intended to prevent water from entering a gap between a battery pack and a floor plate of a vehicle and was used to form the preamble of claim 1.

[0005] Furthermore, DE 10 2013 003 918 B3, JP 2013 - 157 181 A and DE 10 2018 205 550 A1 show various battery devices on or in motor vehicles with sealing elements between the battery housing and the body area. DE 10 2007 023 391 B4 shows a protective housing for a vehicle battery.

[0006] The object of the present invention is to provide a motor vehicle of the type mentioned above in which the noise intensity of noise transmitted between a battery device and a body area of ​​the motor vehicle is reduced. This object is achieved by a motor vehicle with the features of claim 1. Advantageous embodiments of the present invention are the subject of the dependent claims.

[0007] The invention relates to a motor vehicle comprising at least one battery device and at least one spacer arranged between the at least one battery device and at least one body section of the motor vehicle, and by means of which the at least one battery device is spaced from the at least one body section. The battery device can, for example, comprise a high-voltage battery (HV battery) for supplying at least one electrically operated drive motor of the motor vehicle with electrical energy. Accordingly, the battery device can be configured as a high-voltage battery device.

[0008] According to the invention, the at least one spacer comprises at least one sealing element, which seals at least one gap, at least partially limited by the spacer and extending between the at least one battery device and the at least one body area, from the surroundings of the motor vehicle. This is advantageous because the design and sealing of the at least one gap by means of the spacer provides effective vibration decoupling and associated noise decoupling between the battery device and the body area, thereby reducing the intensity of (driving-related) noise transmitted between the battery device and the body area of ​​the motor vehicle.Due to the sealing and limitation of the gap by means of the spacer or its sealing element, the gap can be sealed against the ingress of moisture from the environment and thus be designed as a dry space. Preferably, the spacer or sealing element prevents air contained in the gap from escaping into the environment. Thus, the air contained in the gap can be compressible and / or expandable as a result of relative movements (e.g., vibrations) between the battery assembly and the vehicle body area caused by driving (generated during vehicle travel), which can lead to a change in the volume of the gap. This can result in particularly effective damping of noise transmission between the battery assembly and the vehicle body area.The spacer allows, for example, a particularly favorable introduction of loads in the form of forces in the upward direction of the vehicle into the battery assembly, for example into a battery housing element of a battery housing of the battery assembly, and thus protects, for example, the respective battery modules of the battery assembly.

[0009] Preferably, the at least one sealing element can completely surround the at least one gap on its circumference within a sealing plane. This ensures a particularly effective seal of the gap by the sealing element. For this purpose, the sealing element can have a polygonal, in particular quadrilateral, for example rectangular, sealing element contour in the vehicle's vertical direction. The sealing plane can be oriented perpendicular to the vehicle's vertical direction.

[0010] According to the invention, the at least one spacer comprises a plurality of strut elements which extend at least partially over the gap. This is advantageous because the strut elements enable at least partial stiffening in the area of ​​the gap.

[0011] According to the invention, the at least one spacer comprises at least one elastomeric element which is clamped between at least one strut element of the plurality of strut elements and the at least one body area of ​​the motor vehicle. The at least one elastomeric element allows for particularly effective damping of vibrations and noise caused by driving. The at least one elastomeric element can be designed as a rubber element, for example as a hard rubber element or as a soft rubber element.

[0012] According to the invention, the at least one elastomer element exerts a smaller contact force on the at least one strut element and the at least one body section than the at least one sealing element. This is advantageous because not only the at least one sealing element, but also the at least one elastomer element is pre-tensioned against the body section on the one hand and against the strut element on the other. This results in a particularly reliable sealing effect by the sealing element and particularly effective vibration and noise damping, especially since the elastomer element can, for example, prevent driving-related contact between the body section and the strut element, and thus also between the body section and the battery assembly.

[0013] In an advantageous embodiment of the invention, the at least one spacer comprises at least one frame that defines the at least one gap. This is advantageous because the frame enables particularly favorable load application and simple definition of the gap. The frame can, for example, define the gap in a plane perpendicular to the vehicle's vertical direction. Preferably, the frame can be formed in one piece, thus enabling particularly simple assembly. The frame can be polygonal, in particular quadrilateral, i.e., rectangular, for example, thereby enabling a uniform, symmetrical transmission of loads or forces.

[0014] In a further advantageous embodiment of the invention, at least one strut element of the plurality of strut elements is connected at its opposing strut element ends to opposing frame elements of the frame. This is advantageous because the spacer can thereby be kept particularly dimensionally stable even under loads or forces caused by driving operation.

[0015] In a further advantageous embodiment of the invention, at least two strut elements of the plurality of strut elements intersect. This advantageously contributes to increased stiffness of the spacer. Preferably, the at least two strut elements intersect in a common plane of extension, which can be oriented perpendicular to the vehicle's vertical direction. This creates a particularly space-saving stiffening of the spacer in the vehicle's vertical direction.

[0016] In a further advantageous embodiment of the invention, the at least one spacer is connected to the at least one battery device by a material-bonded seal. This is advantageous because it provides a particularly reliable seal of the gap. The spacer can, for example, be connected to the battery device by an adhesive bond.

[0017] In a further advantageous embodiment of the invention, the at least one gap extends between an outer housing surface of a battery housing element of the at least one battery device and the at least one body area. This is advantageous because loads can be transferred particularly efficiently via the battery housing element, and the respective battery modules of the battery device can be effectively protected from loads or forces caused by driving. The outer housing surface can, at least partially, face the surroundings of the vehicle.

[0018] In a further advantageous embodiment of the invention, at least one body section is designed as an underbody element, in particular an underbody panel, and the at least one intermediate space extends between an outer surface of the underbody element and the at least one battery device. This is advantageous because the underbody element, designed, for example, as an underbody panel, is particularly suitable for transferring operational loads and for the space-saving arrangement of the battery device. The outer surface of the underbody element can, at least partially, face the surroundings of the vehicle.

[0019] The invention also includes combinations of the features of the described embodiments.

[0020] The following are exemplary embodiments of the invention described. This is illustrated by: Fig. 1 a sectional view of respective sub-areas of a battery device, a spacer and a body area of ​​a motor vehicle; Fig. 2 a perspective view of the spacer; and Fig. 3 A perspective view of the spacer mounted on the battery device.

[0021] The exemplary embodiments described below are preferred embodiments of the invention. In these exemplary embodiments, the described components each represent individual features of the invention that can be considered independently of one another. Each of these features further develops the invention independently and can therefore be considered part of the invention individually or in a combination other than that shown. Furthermore, the described embodiments can also be supplemented by other features of the invention already described.

[0022] In the figures, identical reference symbols denote functionally equivalent elements.

[0023] Fig. Figure 1 shows a sectional view of a section of a motor vehicle 100 along a section plane oriented perpendicular to the vehicle's vertical direction z, indicated by an arrow. The motor vehicle 100 comprises a battery assembly 10 and a spacer 20. The spacer 20 is positioned between the battery assembly 10 and a body section 102 of the motor vehicle 100. The spacer 20 separates the battery assembly 10 from the body section 102. The spacer 20 is connected to the battery assembly 10 by a material-fit seal.

[0024] The in Fig. 2 and Fig. Three spacers 20, each shown in perspective view, comprise a sealing element 60, which seals a gap 50 against the surroundings U of the motor vehicle 100. The gap 50 is directly bounded by the spacer 20, the battery assembly 10, and the body section 102, and extends vertically z between the battery assembly 10 and the body section 102.

[0025] The gap 50 extends between an outer housing surface 14 of a battery housing element 12 of the battery device 10 and the body area 102, as shown in particular in Fig. 1 is recognizable. The body area 102 is designed in this case as an underbody panel, which forms at least part of a central floor of the motor vehicle 100. The gap 50 extends overall between an underbody element outer surface 104 of the underbody element (body area 102) and the housing outer surface 14.

[0026] The spacer 20 comprises a frame 30 which circumferentially defines the space 50 in a plane oriented perpendicular to the vehicle's vertical direction z.

[0027] Furthermore, the spacer 20 comprises a plurality of strut elements 40, 42, 44, 46, which extend at least partially over the space 50. In this case, all strut elements 40, 42, 44, 46 are connected at their opposing strut element ends 48, 49 to opposing frame elements 32, 34 of the frame 30. The frame elements 32, 34 can, for example, extend in the longitudinal direction of the motor vehicle 100.

[0028] Some strut elements 40, 42 of the majority of strut elements 40, 42, 44, 46 intersect in pairs, as shown in Fig. 2 and Fig. 3 is recognizable. Other strut elements 44, 46 of the majority of strut elements 40, 42, 44, 46 are oriented perpendicular to the frame elements 32, 34 and connected to them.

[0029] The crossed strut elements 40, 42 are arranged in the longitudinal direction of the motor vehicle 100 between the other strut elements 44, 46, which are oriented (arranged) perpendicularly to the frame elements 32, 34. This gives the spacer 20 a particularly high stiffness.

[0030] The spacer 20 also comprises several elastomeric elements 70, each of which can be assigned to one of the strut elements 40, 42, 44, 46, as shown in Fig. 2 and Fig. 3 is recognizable, and which are clamped between the strut elements 40, 42, 44, 46 and the body area 102 of the motor vehicle 100. The respective elastomer elements 70 exert a smaller contact force on the respective strut element 40, 42, 44, 46 and the body area 102 than the sealing element 60.

[0031] Overall, the examples demonstrate how the invention provides a dry space 50 between the body section 102, i.e., the body of the motor vehicle 100, and the battery device 10, and thus a battery of the motor vehicle 100. The spacer serves to selectively transfer forces occurring in the vehicle's vertical direction z during (driving-related) loads into the battery housing element 12 and thus into a battery housing structure of the battery device 10 encompassing the battery housing element 12, thereby protecting the respective battery modules of the battery device 10. The spacer 20 is arranged above the battery housing element 12 in the vehicle's vertical direction z and is, for example, bonded to it. The spacer 20 includes a seal in the form of the sealing element 60, which in this case is arranged on the frame 30.The sealing element 60, together with the frame 30, makes it possible to form the dry space (intermediate space 50) between the body section 102 (body) and the battery device 10 or the battery housing element 12. The spacer 20, through its sealing element 60, also performs an acoustically damping function, reducing noise emissions (driving noise, ambient noise) or decreasing their intensity, so that the noise emissions are less perceptible in an interior, for example a passenger compartment, of the motor vehicle 100, and thus at least a significant degree of acoustic isolation can be achieved.

Claims

[1] Motor vehicle (100) with at least one battery device (10) and with at least one spacer (20) which is arranged between the at least one battery device (10) and at least one body area (102) of the motor vehicle (100) and by means of which the at least one battery device (10) is spaced away from the at least one body area (102), wherein the at least one spacer (20) comprises at least one sealing element (60) which seals at least one gap (50), which is at least partially limited by means of the at least one spacer (20) and which extends between the at least one battery device (10) and the at least one body area (102), against an environment (U) of the motor vehicle (100), wherein at least one spacer (20) comprises a plurality of strut elements (40, 42, 44, 46) which extend at least partially over the space (50), wherein the at least one spacer (20) comprises at least one elastomer element (70) which is clamped between at least one strut element (40, 42) of the plurality of strut elements (40, 42, 44, 46) and the at least one body area (102) of the motor vehicle (100), characterized by , that that at least one elastomer element (70) exerts a greater contact force on the at least one strut element (40, 42) and the at least one body area (102) than the at least one sealing element (60). [2] Motor vehicle (100) according to claim 1, characterized by , that the at least one spacer (20) includes at least one frame (30) which defines the at least one gap (50). [3] Motor vehicle (100) according to claim 2, characterized by , that at least one strut element (40, 42) of the plurality of strut elements (40, 42, 44, 46) is connected at its opposite strut element ends (48, 49) to opposite frame elements (32, 34) of the frame (30). [4] Motor vehicle (100) according to claims 1 to 3, characterized by , that at least two strut elements (40, 42) of the majority of strut elements (40, 42, 44, 46) intersect. [5] Motor vehicle (100) according to any one of the preceding claims, characterized by , that at least one spacer (20) is connected to at least one battery device (10) in a material-fit sealing manner. [6] Motor vehicle (100) according to any one of the preceding claims, characterized by , that the at least one space (50) extends between an outer housing surface (14) of a battery housing element (12) of the at least one battery device (10) and the at least one body area (102). [7] Motor vehicle (100) according to any one of the preceding claims, characterized by , that the at least one body area (102) is designed as an underbody element, in particular an underbody sheet, and that the at least one space (50) extends between an underbody element outer surface (104) of the underbody element and the at least one battery device (10).

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