Electrically powered motor vehicle

Abstract

Electrically powered motor vehicle (2) with a vehicle body (20) defining a vehicle interior (21) and a battery storage housing (3) arranged at least partially under the vehicle body (20), which accommodates an electrical energy storage device (39), preferably a high-voltage storage device, wherein a gap (1) is formed between an underbody wall (22) of the vehicle body (20) and an upper housing wall (31) of the battery storage housing (3), characterized in that at least one underbody opening (24) which can be closed by means of an underbody cover (26) is provided in the underbody wall (22) of the vehicle body (20), and that at least one electrical connection device (35) of the energy storage device (39) and / or at least one battery storage housing opening (36) is provided on or in the upper housing wall (31) of the battery storage housing (3).which is located opposite the at least one underbody opening (24) and which forms an access to the interior of the hermetically sealed battery storage housing (3), and that a sealing arrangement (10) is provided in the gap space (1) which abuts the upper housing wall (31) of the battery storage housing (3) and the underbody wall (22) in a sealing manner and which seals an inner area of ​​the gap space (1) from an outer area of ​​the gap space (1), so that the inner area of ​​the gap space (1) forms a dry space (18) accessible from the vehicle interior (21) through the underbody opening (24), that the sealing arrangement (10) seals around both the at least one electrical connection device (35) and / or the at least one battery storage housing opening (36) as well as the at least one underbody opening (24),so that the drying chamber (18) provides a connection between the underbody opening (24) and the battery storage housing opening (36), sealed off from the vehicle's surroundings, which forms an access from the vehicle cabin to the interior of the battery storage housing through the drying chamber.

Description

The invention relates to an electrically operated motor vehicle according to the preamble of claim 1.In electrically operated motor vehicles which have a battery storage housing arranged at least in regions under the vehicle body, for example for a high-voltage storage device, a gap space determined by an assembly gap is formed between the vehicle body and the battery storage housing due to tolerances and in order to avoid a large-area contact of the battery storage housing, namely the upper housing wall of the battery storage housing, with the underbody wall of the vehicle body. This gap space is exposed to environmental influences since it is located outside the enclosed vehicle interior and outside the enclosed interior of the battery storage housing. Furthermore, condensation water can collect on the upper housing wall of the battery storage housing in this gap space.Connecting devices provided on the battery storage housing for electrical supply and control lines, which lead from the watertightly closed battery storage housing through the gap space into the vehicle interior, and corresponding electrical lines leading into the vehicle interior, must therefore be sealed off in a complicated manner at the respective transition into the gap space, that is to say in the upper housing wall of the battery storage housing and in the underbody wall of the vehicle body. In addition, the battery storage housing must first be removed from the vehicle body for contacting, maintenance and repair work on the electrical connections and, if appropriate, also for maintenance work on electronic components inside the battery storage housing, in order to gain access to the electrical connections and, if appropriate, also gain access to the electronic components by removing the upper housing wall of the battery storage housing.From the prior art, for example from DE 10 2021 119 112 A1 or from DE 10 2020 129 703 A1, numerous variants of screw connections between a vehicle body and a battery receiving housing arranged underneath them are known, which comprise a screw surrounded by a seal, which screw holds the battery receiving housing on the vehicle body. The seal extends between the vehicle body and the battery receiving housing and seals the screw from the environment in the region of a gap formed between the vehicle body and the battery receiving housing.DE 10 2020 126 424 A1 relates to a battery storage device having a battery storage housing divided into two, with a lower battery storage housing part and an upper battery storage housing part, which are separated from one another by a horizontal double wall through which a cooling fluid flows. Electrical connecting lines are passed through this double wall in a sealing manner.It is the object of the present invention to improve an electrically operated motor vehicle of the generic type in such a way that maintenance costs are reduced.This object is achieved with the features of claim 1.An electrically operated motor vehicle having a vehicle body and a battery storage housing arranged at least in regions under the vehicle body, which housing an electrical power store, preferably a high-voltage store, wherein a gap space is formed between an underbody wall of the vehicle body and an upper housing wall of the battery storage housing, is distinguished in that at least one underbody opening is provided in the underbody wall of the vehicle body, in that at least one electrical connection device of the power store and / or at least one battery storage housing opening is provided on or in the upper housing wall of the battery storage housing, said electrical connection device being situated opposite the at least one underbody opening and forming an access to the interior of the hermetically watertightly closed battery storage housing, and in that a sealing arrangement is provided in the gap space, which sealingly abuts the upper housing wall of the battery storage housing and the underbody wall and sealingly separates an inner region of the gap space from an outer region of the gap space, such that the inner region of the gap space forms a drying space, such that the sealing arrangement sealingly surrounds both the at least one electrical connection device and / or the at least one battery storage housing opening and the at least one underbody opening, preferably in the region of the edges thereof, such that the drying space establishes a connection, which is sealed off from the environment of the vehicle, between the underbody opening and the battery storage housing opening and forms an access from the vehicle cabin to the interior of the battery storage housing through the drying space.The region of the gap space surrounded by the sealing arrangement forms a dry space which is sealed off from the remaining gap space forming a wet space. Therefore, electrical lines, for example supply and control lines, which run between the at least one connection device or the battery storage housing and the vehicle interior can be led through this drying space without separate seals being required. Also, with the underbody opening and the battery storage housing opening, access is provided through this drying space from the vehicle cabin to the interior of the battery storage housing, which can be used for service and repair work. These opposing openings may be in a horizontal plane, a vertical plane or an inclined plane, or they may be curved or stepped.Further preferred and advantageous design features of the motor vehicle according to the invention are the subject matter of the dependent claims 2 to 10.The sealing arrangement preferably has an annular sealing wall which is designed as an concertina wall. In this way, the sealing wall forms a bellows which surrounds the underbody opening and the battery storage housing opening.In an alternative embodiment of the invention, the sealing arrangement has an annular sealing wall which is designed as a tubular seal. Such a hose seal-as well as the concertina seal-is capable of following both vertical and horizontal relative movements of the battery storage housing and the vehicle body without the sealing effect being canceled in the process.This adaptation of the relative movement of the sealing device is preferably improved in that the sealing wall, in particular the material of the sealing wall, is elastic and / or flexible.An embodiment of the invention is particularly advantageous, which can be combined with other embodiments, in which the sealing arrangement is connected both to the upper housing wall of the battery storage housing and to the underbody wall of the vehicle body. This prevents the sealing device from becoming detached from the upper housing wall of the battery storage housing and / or from the underbody wall in the event of extreme relative movements, and a leakage thereby arising.It is particularly advantageous if the sealing arrangement has a lower mounting flange which is mechanically connected, preferably screwed, to the upper housing wall of the battery storage housing, if the sealing arrangement has an upper mounting flange which is mechanically connected, preferably screwed, to the underbody wall of the vehicle body, and if the sealing wall extends between the two mounting flanges and is preferably formed integrally therewith.Finally, it is also advantageous in all embodiments if the underbody opening in the underbody wall of the vehicle body is closable by means of an underbody cover. This creates a partitioning of the dry space in the gap space from the vehicle interior.It is likewise advantageous in all embodiments if the battery storage housing opening in the upper housing wall of the battery storage housing is closable by means of a battery storage housing cover. This creates an additional partitioning of the interior of the battery storage housing from the dry space.The invention is preferably realized in such a way that the battery storage housing opening is provided in a region of the battery storage housing in which electrical connections of the power storage and / or electronic components are provided in the battery storage housing. This easy accessibility of the interior of the battery storage housing significantly simplifies the maintenance of the components and electrical connections contained in the battery storage housing.The invention can also be realized particularly advantageously if the battery storage housing has an electronics box arranged above the electrical energy store and if the battery storage housing opening provided in the upper housing wall of the battery storage housing is formed in a housing wall section of the electronics box.Preferred exemplary embodiments of the invention with additional design details and further advantages are described and explained in more detail below with reference to the attached drawing.It shows: FIG. 1 is a partially sectional side view of an electrically operated motor vehicle according to the invention; FIG. 2 shows a perspective top view of a detail of a first exemplary embodiment of a motor vehicle according to the invention, and FIG. 3 shows a perspective top view of a detail of a second exemplary embodiment of a motor vehicle according to the invention.FIG. 1 shows an electrically operated motor vehicle 2 having a vehicle body 20 which defines a vehicle interior 21, and a battery storage housing 3 which is arranged at least in regions under the vehicle body 20 and is surrounded by a collision protection frame 30. In the interior of the hermetically watertightly closed battery storage housing 3, at least one electrical storage device 39 and electronic components 38 assigned to it, for example a control device, are provided. A gap space 1 is formed between an underbody wall 22 of the vehicle body 20 and an upper housing wall 31 of the battery storage housing 3 spaced apart therefrom. In the gap space 1, a sealing arrangement 10 with an annularly closed sealing wall 11 in the form of an concertina-like bellows seal 12 with an concertina wall 13 is provided.The sealing arrangement 10 has an upper annularly closed mounting flange 14 and a lower annularly closed mounting flange 16, between which the sealing wall 11 extends. The respective mounting flange 14, 16 is provided with fastening means 15, 17, which in the example shown are formed by threaded bolts arranged along the respective circumference. The upper mounting flange 14 is screwed to the underbody wall 22 of the vehicle body 20 in a sealing manner by means of its threaded bolts 15, and the lower mounting flange 16 is screwed to the upper housing wall 31 of the battery storage housing 3 by means of its threaded bolts 17. The upper mounting flange 14 surrounds an underbody opening 24 provided in the underbody wall 22 of the vehicle body 20, as can be seen in FIGS. 2 and 3.As can be seen in FIG. 2, the underbody opening 24 can be closed by an underbody cover 26. The underbody cover 26 can be designed as a pivotable flap or it can be fixable on the edge of the underbody opening 24, for example screwable to the edge.In a first embodiment according to FIG. 2, the lower mounting flange 16 surrounds an electrical connection device 32 provided on the upper housing wall 31 of the battery storage housing 3, which is connected in an electrically conductive manner in a sealing manner to the power storage 39 and / or the electronic components 38 assigned thereto via electrical supply lines 33 and / or control lines 34. The electrical connection device 32 can be coupled in an electrically conductive manner to an electrical connecting line 35 leading into the vehicle interior 21 and is coupled in the illustration of FIG. 2. The underbody cover 26 has a cable feedthrough opening through which the electrical connecting line 35 is guided into the vehicle interior. The electrical connection line 35 may include electrical supply lines 33' and / or control lines 34'.In a second embodiment shown in FIG. 3, the lower mounting flange 16 surrounds a battery storage housing opening 36 provided in the upper housing wall 31 of the battery storage housing 3, and in this way an inner region of the gap space 1 is sealingly separated from the remaining outer part of the gap space 1 and thus forms a dry space 18 which establishes a connection, sealed from the environment of the vehicle, between the underbody opening 24 and the battery storage housing opening 36.As can be seen in FIG. 3, the battery storage housing opening 36 can be closed by a battery storage housing cover 37. The respective cover 26, 37 can be designed as a pivotable flap or it can be fixable on the respective edge of the associated opening 24, 36, for example screwable to the edge. The respective cover 26, 37 can also have cable feedthrough openings through which electrical supply lines and / or control lines are guided from the interior of the battery storage housing 36 into the vehicle interior.The invention is not limited to the above embodiment, which serves merely to explain the core idea of the invention in general. Rather, within the scope of the invention, the device according to the invention can also assume embodiments other than those described above. The device can in particular have features which represent a combination of the respective individual features of the claims.Reference numerals in the claims, the description and the drawings are used merely for better understanding of the invention and are not intended to limit the scope of protection.List of reference characters1 Gap space 2 Motor vehicle 3 Battery storage housing 10 Sealing arrangement 11 Sealing wall 12 Bellows seal 13 Concertina wall 14 Upper annularly closed mounting flange 15 Fastening means / threaded bolts 16 Lower annularly closed mounting flange 17 Fastening means / threaded bolts 18 Dry space 20 Vehicle body 21 Vehicle interior 22 Underbody wall 24 Underbody opening 26 Underbody cover 30 Collision protection frame 31 Upper housing wall 32 Electrical connection device 33 Electrical supply line 33' Electrical supply line 34 Control line 34' Control line 35 Electrical connection line 36 Battery storage housing opening 37 Battery storage housing cover 38 Electronic component 39 Electrical storage

Claims

Electrically operated motor vehicle (2) having a vehicle body (20) which defines a vehicle interior (21), and having a battery storage housing (3) which is arranged at least in regions under the vehicle body (20) and accommodates an electrical energy store (39), preferably a high-voltage store, wherein a gap space (1) is formed between an underbody wall (22) of the vehicle body (20) and an upper housing wall (31) of the battery storage housing (3), characterized in that at least one underbody opening (24) which can be closed by means of an underbody cover (26) is provided in the underbody wall (22) of the vehicle body (20), and in that at least one electrical connection device (35) of the energy store (39) and / or at least one battery storage housing opening (36) is provided on or in the upper housing wall (31) of the battery storage housing (3), which is situated opposite the at least one underbody opening (24) and which forms an access to the interior of the hermetically watertightly closed battery storage housing (3), and in that a sealing arrangement (10) is provided in the gap space (1), which sealing arrangement sealingly bears against the upper housing wall (31) of the battery storage housing (3) and against the underbody wall (22) and which sealingly separates an inner region of the gap space (1) from an outer region of the gap space (1), such that the inner region of the gap space (1) forms a dry space (18) which is accessible from the vehicle interior (21) through the underbody opening (24), and in that the sealing arrangement (10) sealingly surrounds both the at least one electrical connection device (35) and / or the at least one battery storage housing opening (36) and the at least one underbody opening (24), so that the drying space (18) establishes a connection between the underbody opening (24) and the battery storage housing opening (36), which connection is sealed off from the environment of the vehicle and forms an access from the vehicle cabin to the interior of the battery storage housing through the drying space.Electrically operated motor vehicle according to Claim 1, characterized in that the sealing arrangement (10) has an annular sealing wall (11) which is designed as an concertina wall (13).Electrically operated motor vehicle according to Claim 1, characterized in that the sealing arrangement (10) has an annular sealing wall (11) which is designed as a tubular seal.Electrically operated motor vehicle according to Claim 2 or 3, characterized in that the sealing wall (11) is elastic and / or flexible.Electrically operated motor vehicle according to one of the preceding claims, characterized in that the sealing arrangement (10) is connected both to the upper housing wall (31) of the battery storage housing (3) and to the underbody wall (22) of the vehicle body (20).Electrically operated motor vehicle according to Claim 5, characterized in that the sealing arrangement (10) has a lower mounting flange (16) which is mechanically connected, preferably screwed, to the upper housing wall (31) of the battery storage housing (3), in that the sealing arrangement (10) has an upper mounting flange (14) which is mechanically connected, preferably screwed, to the underbody wall (22) of the vehicle body (20), and in that the sealing wall (11) extends between the two mounting flanges (14, 16) and is preferably formed integrally therewith.Electrically operated motor vehicle according to one of the preceding claims, having a battery storage housing opening (36) situated opposite the underbody opening (24), characterized in that the underbody opening (24), which can be closed by means of the underbody cover (26), provides service and repair access from the vehicle interior (21) to the interior of the battery storage housing (3).Electrically operated motor vehicle according to one of the preceding claims, characterized in that the battery storage housing opening (36) in the upper housing wall (31) of the battery storage housing (3) can be closed by means of a battery storage housing cover (37).Electrically operated motor vehicle according to one of the preceding claims, characterized in that the battery storage housing opening (36) is provided in a region of the battery storage housing (3) in which electronic components (38) are provided in the battery storage housing (3).Electrically operated motor vehicle according to one of the preceding claims, characterized in that the battery storage housing (3) has an electronics box arranged above the electrical power store (39), and in that the battery storage housing opening (36) provided in the upper housing wall (31) of the battery storage housing (3) is formed in a housing wall section of the electronics box.

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