Housing arrangement, battery arrangement and vehicle

Abstract

A housing arrangement (20) comprises a housing part (22) and a cover part arrangement (30), wherein the housing part (22) is at least partially electrically conductive, wherein the cover part arrangement (30) comprises a plastic cover (32) and a metal foil (34), wherein the metal foil (34) is arranged on the inside (51) of the plastic cover (32), and wherein the metal foil (34) is in electrical contact with the housing part (22) at a first contact point (80) when the housing arrangement (20) is closed.

Description

[0001] The invention relates to a housing arrangement, a battery arrangement and a vehicle.

[0002] DE 10 2013 213 233 A1 discloses a method for manufacturing a housing with shielding.

[0003] DE 10 2011 052 515 A1 shows a housing part with an electromagnetically insulating planar element.

[0004] DE 20 2012 104 339 U1 shows a housing part with an electromagnetically insulating planar element.

[0005] WO 2022 / 216 718 A1 describes a method for generating EMC shielding in a battery housing.

[0006] DE 10 2016 100 567 A1 shows a battery pack cover that uses polymer as a material.

[0007] DE 10 2012 109 447 A1 discloses a housing component comprising a wall area shielding against electric, magnetic and / or electromagnetic stray fields, which has a supporting wall made of plastic produced by primary forming processes and an electrically conductive shield, wherein the supporting wall is integrally formed with the shielding element.

[0008] The subsequently published DE 10 2023 128 735 A1 shows a shielding element for shielding an electronic component, wherein a base body is connected to a conductive layer.

[0009] It is therefore an object of the invention to provide a new housing arrangement, a new battery arrangement and a new vehicle.

[0010] These tasks are solved by the subject matter of the independent claim and the subsidiary claims.

[0011] A housing assembly comprises a housing part and a cover part assembly, wherein the housing part is at least partially electrically conductive, and wherein the cover part assembly comprises a plastic cover and a metal foil, the metal foil being arranged on the inside of the plastic cover, and wherein, in the closed state of the housing assembly, the metal foil is in electrical contact with the housing part at a first contact point. Providing the shielding in the inner area offers advantages for sealing and protects the metal foil.

[0012] According to a preferred embodiment, the plastic lid has a projection, wherein the projection is configured to exert a force on the metal foil in the direction of the housing part at the first contact point when the housing arrangement is closed.

[0013] A protruding element is integrally formed on the plastic lid. This element is in contact with both the metal foil and the plastic lid and is electrically conductive. When the housing assembly is closed, the protruding element is in electrical contact with the housing part. Such a protruding element can be manufactured reliably, and the position of the metal foil can have a higher tolerance than in the embodiment with the protruding element.

[0014] The protruding element is made of an electrically conductive plastic. It can be manufactured using injection molding, and its electrical conductivity is ensured.

[0015] According to a preferred embodiment, the projection element is designed as an injection-molded projection element. This manufacturing process has proven to be particularly reliable.

[0016] According to a preferred embodiment, the housing assembly includes a sealing arrangement which, in the closed state of the housing assembly, is located between the plastic cover and the housing part. The sealing arrangement defines a dry area of ​​the housing assembly, and the first contact point is located in this dry area. This has proven advantageous as protection against corrosion in the contact area. Furthermore, the sealing of the housing assembly can be achieved with greater process reliability than if the sealing arrangement were located in the outer wet area.

[0017] According to a preferred embodiment, the housing part has a flange, and the cover assembly is connected to the housing part in the area of ​​the flange. A flange facilitates assembly.

[0018] According to a preferred embodiment, the cover assembly and the housing part are connected to each other by a screw connection. Screw connections allow for high contact pressure.

[0019] According to a preferred embodiment, the metal foil comprises aluminum or an aluminum alloy. These materials are readily processable into a foil.

[0020] In a preferred embodiment, the metal foil is bonded to the lid assembly. This reduces the risk of the metal foil tearing.

[0021] According to a preferred embodiment, the metal foil is inserted into the lid assembly. This insertion can take place during the molding process for the plastic lid.

[0022] A battery assembly features such a housing arrangement. The battery modules are well protected, and the housing arrangement offers good electromagnetic compatibility.

[0023] According to a preferred embodiment, the battery arrangement is a traction battery arrangement.

[0024] A vehicle has such a battery arrangement. This increases the vehicle's safety.

[0025] Further details and advantageous embodiments of the invention will become apparent from the exemplary embodiments described below and illustrated in the drawings, which are in no way to be understood as limiting the invention, as well as from the dependent claims. It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the present invention. It shows: Fig. 1 in a schematic cross-section a vehicle with a battery arrangement comprising a housing arrangement, Fig. 2 in a schematic top view the battery arrangement of Fig. 1, Fig. 3 in a detailed representation of a detail III of Fig. 1 a first embodiment of the housing arrangement, and Fig. 4 in a detailed representation of Detail III of Fig. 1 a second embodiment of the housing arrangement.

[0026] In the following, identical or similarly functioning parts are designated with the same reference symbols and are usually described only once. The description builds upon itself across figures to avoid unnecessary repetition.

[0027] Fig. Figure 1 shows a schematic representation of a vehicle 10 with a battery arrangement 12.

[0028] The battery arrangement 12 has a housing arrangement 20, battery modules 14 and a control device 16.

[0029] The housing arrangement 20 has a housing part 22 and a cover part arrangement 30.

[0030] The housing arrangement 20 separates an interior space 51 from an exterior space 52.

[0031] The housing assembly 20 has a flange 24, and the cover part assembly 30 is connected to the housing part 22 in the area of ​​the flange 24.

[0032] In the exemplary embodiment, the cover part assembly 30 is screwed to the housing part 22 via screws 91, but it can also be fastened by a welded connection or snap-fit ​​connection.

[0033] The housing part 22 is designed to be electrically conductive, at least in sections.

[0034] Fig. 2 shows the housing arrangement of Fig. 1 in a top view.

[0035] The cover part assembly 30 is connected all around to the housing part 22.

[0036] In the exemplary embodiment, a circumferential sealing arrangement 71 is provided within the screws 91.

[0037] In addition, a further circumferential sealing arrangement 71 is preferably provided outside the screws 91.

[0038] The sealing arrangements define a dry space within the sealing arrangement 72, or at least within the sealing arrangement 71, in which the battery modules 14 are arranged and protected from moisture.

[0039] Fig. 3 shows detail III of Fig. 1 in a first embodiment.

[0040] The lid assembly 30 has a plastic lid 32 and a metal foil 34.

[0041] The plastic lid 32 can be easily manufactured, for example by an injection molding process.

[0042] The metal foil 34 is arranged on the inside 51 of the plastic lid 32.

[0043] The metal foil 34 is in electrical contact with the housing part 22 at a contact point 80 when the housing arrangement 20 is closed.

[0044] The plastic cover 32 has a projection 36, the projection 36 being designed to exert a force F on the metal foil 34 in the direction of the housing part 22 at the first contact point 80 when the housing arrangement 20 is closed.

[0045] The plastic cover 32 is easy to manufacture. However, it has the disadvantage that ordinary plastic is not electrically conductive. Therefore, no shielding can be achieved via the plastic cover 32, and the electromagnetic compatibility (EMC) is poor.

[0046] Shielding can be achieved by means of the metal foil 34. However, for good shielding, a sufficient electrical connection between the metal foil 34 and the housing part 22 is advantageous.

[0047] The sealing arrangements 71, 72 are shown.

[0048] The sealing arrangements 71, 72 are provided between the plastic cover 32 and the housing part 22 in the closed state of the housing arrangement 20.

[0049] The sealing arrangement 72 and in particular the sealing arrangement 71 define a dry area 53 of the housing arrangement 20.

[0050] The contact point 80 is preferably located in the dry area 53. This protects the contact point 80 from corrosion, and a seal outside the contact point 80 has proven to be very reliable.

[0051] The sealing arrangements 71, 72 can, for example, consist of an elastic plastic, in particular of foam rubber.

[0052] The projection 36 also enables a defined distance between the plastic cover 32 and the housing part 22. This allows for a good seal via the sealing arrangements 71, 72.

[0053] The projection 36 can also be used to limit the inward slippage of the sealing arrangement 71.

[0054] The cover assembly 30 and the housing part 22 are connected to each other by a screw connection 90. A screw 91 connects the cover assembly and the housing part 22 to each other.

[0055] Screw 91, for example, can be made of plastic or metal.

[0056] In the exemplary embodiment, a bushing, in particular a metal bushing, is provided in the area of ​​the cover part assembly 30. This enables a defined connection by the screw 91, since the plastic of the plastic cover 32 is comparatively soft.

[0057] The metal foil 34 preferably comprises aluminum or an aluminum alloy. Aluminum and its alloys are well suited for the formation of foils.

[0058] The metal foil 34 is preferably bonded to the lid assembly 30. An adhesive is therefore provided between the metal foil 34 and the lid assembly 30.

[0059] The metal foil 34 can also be inserted into the lid assembly 30. Such insertion can take place during the plastics manufacturing process.

[0060] Fig. Figure 4 shows another embodiment of Detail III of Fig. 1.

[0061] The metal foil 34 lies against the plastic lid 32 up to its outer edge.

[0062] A protruding element 60 is formed on the plastic lid 32, which is in contact with both the metal foil 34 and the plastic lid 32 and is electrically conductive.

[0063] The projection element 60 is in electrical contact with the housing part 22 when the housing arrangement 20 is closed. The projection element 60 thus enables, on the one hand, a defined holding of the metal foil 34 relative to the plastic cover 32, and on the other hand, the projection element 60 establishes an electrical connection between the metal foil 34 and the housing part 22.

[0064] The molded protrusion element 60 is preferably made of electrically conductive plastic. To make the plastic electrically conductive, carbon black, for example, can be added to it.

[0065] The projection element 60 is preferably designed as an injection-molded projection element.

[0066] The protruding element 60 can alternatively be made of a metal and thus be inherently conductive.

[0067] Naturally, various variations and modifications are possible within the scope of the present invention.

[0068] In the exemplary embodiments, the projection 36 and the projection element 60 are formed circumferentially. Alternatively, the projection 36 and the projection element 60 can also have interrupted sections, so that, for example, a contact point 80 is provided only every 2 cm or 6 cm. This leads to an increase in the contact pressure in the area of ​​the contact points 80.

Claims

[1] Housing arrangement (20) comprising a housing part (22) and a cover part arrangement (30), wherein the housing part (22) is designed to be electrically conductive at least in sections, wherein the lid assembly (30) comprises a plastic lid (32) and a metal foil (34), wherein the metal foil (34) is arranged on the inside (51) of the plastic lid (32), wherein the metal foil (34) is in electrical contact with the housing part (22) at a first contact point (80) when the housing arrangement (20) is closed, wherein a projection element (60) is formed on the plastic lid (32), which is in contact with both the metal foil (34) and the plastic lid (32) and is electrically conductive, wherein the projection element (60) is in electrical contact with the housing part (22) when the housing arrangement (20) is closed, and wherein the projection element (60) comprises an electrically conductive plastic. [2] Housing arrangement (20) according to claim 1, wherein the plastic cover (32) has a projection (36), the projection (36) being configured to exert a force (F) on the metal foil (34) in the direction of the housing part (22) when the housing arrangement (20) is closed at the first contact point (80). [3] Housing arrangement (20) according to one of the preceding claims, wherein the projection element (60) is designed as an injection-molded projection element. [4] Housing arrangement (20) according to one of the preceding claims, which has a sealing arrangement (71, 72) which is provided in the closed state of the housing arrangement (20) between the plastic cover (32) and the housing part (22), wherein the sealing arrangement (71, 72) defines a dry area (53) of the housing arrangement (20), and wherein the first contact point (80) is arranged in the dry area (53). [5] Housing arrangement (20) according to one of the preceding claims, wherein the housing part (22) has a flange (24) and wherein the cover part arrangement (30) is connected to the housing part (22) in the area of ​​the flange (24). [6] Housing arrangement (20) according to one of the preceding claims, wherein the cover part arrangement (30) and the housing part (22) are connected to each other by a screw connection (90). [7] Housing arrangement (20) according to one of the preceding claims, wherein the metal foil (34) comprises aluminium or an aluminium alloy. [8] Housing arrangement (20) according to one of the preceding claims, wherein the metal foil (34) is bonded to the cover part arrangement (30). [9] Housing arrangement (20) according to one of the preceding claims, wherein the metal foil (34) is inserted into the lid part arrangement (30). [10] Battery arrangement (12) comprising a housing arrangement (20) according to one of the preceding claims. [11] Vehicle (10) comprising a battery arrangement (12) according to claim 10.

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