Battery housing component for a traction battery housing and method for the production thereof, traction battery housing, traction battery for a motor vehicle, and motor vehicle comprising a traction battery

Abstract

The invention relates to a battery housing component (1) for a traction battery housing (2) which is designed to receive at least one battery component (3), wherein the battery housing component (1) comprises a housing wall (4), which is made of a plastic, and at least one electromagnetically insulating layer (5), wherein the housing wall (4) substantially surrounds the electromagnetically insulating layer (5), wherein the housing wall (4) has a peripheral connection device (6), which is preferably in the form of a connection flange and which is designed for connection to a further battery housing component (1), wherein the electromagnetically insulating layer (5) extends at least partially into the region of the connection device (6), and wherein the battery housing component (1) has, in the region of the connection device (6), an electrically conductive contact surface (7) at which the electromagnetically insulating layer (5) is directly accessible and, in particular, not covered by the housing wall (4). The invention also relates to a method for producing a battery housing component (1), to a traction battery housing (2), to a traction battery, and to a motor vehicle.

Description

[0001] Battery housing component for a traction battery housing and method for its manufacture, traction battery housing, traction battery for a motor vehicle and motor vehicle with a traction battery

[0002] The invention relates to a battery housing component for a traction battery housing. The invention further relates to a method for manufacturing a battery housing component. The invention further relates to a battery housing comprising at least one of the above battery housing components. The invention further relates to a traction battery comprising a battery housing as described above. The invention further relates to a motor vehicle comprising a traction battery as described above.

[0003] In the prior art, battery housings for traction batteries in electric vehicles are known, consisting of at least two connected metallic components, typically made of aluminum or steel. These housings offer effective protection against electromagnetic radiation both emanating from and acting upon the battery, for example, from radiation sources within the vehicle. A disadvantage of these metallic housings is their high weight, which can impair the efficiency and range of the vehicle. A further disadvantage of these metallic housings is their long manufacturing time and high production costs. EP 2 742 549 Bl describes a battery housing component for traction batteries of electric vehicles and a method for its manufacture.The battery housing component consists of a receiving body made of thermoplastic or thermoset plastic material and a flat element made of electrically conductive material. This flat element serves to shield the area surrounding the battery housing component and / or the traction battery from electromagnetic radiation. It can consist of a metal foil, nonwoven fabric, woven fabric, or conductive / polymeric foam material, or it can be a layer applied to the receiving body using sputtering, painting, vapor deposition, or electroplating.

[0004] This allows for a weight reduction compared to battery housing components and housings made of metallic materials, without compromising the shielding of the traction battery against electromagnetic radiation.

[0005] DE 10 2020 111 062 Al also describes a generic battery housing component with a base body and a shielding element, as well as a method for manufacturing such a battery housing component.

[0006] However, in the past, bonding the flat shielding element to the housing wall has proven difficult, particularly due to blistering and wrinkling. Furthermore, reliably bonding the contact surfaces at the joints between two housing components, which are often completely or partially covered by polymer material, presents a challenge. Another problem lies in adapting the flat shielding element to the contour of the housing wall. The invention therefore aims to provide a battery housing component that enables a reliable bond between the shielding layer and the rest of the housing wall, secure contact between the contact surfaces of multiple housing components to be joined, and flawless adaptation of the shielding layer to the housing wall contour.

[0007] The problem underlying the invention is solved by a battery housing component for a traction battery housing having the features of claim 1 of the present invention. Advantageous embodiments are described in the dependent claims.

[0008] More precisely, the problem underlying the invention is solved by a battery housing component for a traction battery housing, which is designed to receive at least one battery component, wherein the battery housing component has a housing wall made of plastic and at least one electromagnetically insulating layer, wherein the housing wall substantially surrounds the electromagnetically insulating layer, wherein the housing wall has a circumferential connecting device, preferably designed as a connecting flange, and which is designed for connection with a further battery housing component, wherein the electromagnetically insulating layer extends at least partially into the area of ​​the connecting device, and wherein the battery housing component has an electrically conductive contact surface in the area of ​​the connecting device.where the electromagnetic insulating layer is directly accessible and, in particular, not covered by the housing wall.

[0009] The battery housing component according to the invention has the advantage that a particularly reliable connection exists between the electromagnetically insulating layer and the housing wall. This is achieved by the housing wall essentially surrounding the electromagnetically insulating layer.

[0010] The battery housing component according to the invention also has the advantage that a particularly reliable contact of the contact surface of the battery housing component is enabled. This is achieved by the fact that the electromagnetic insulating layer extends into the connection element of the battery housing component and is exposed there in the connection element, in particular by partially removing the housing wall covering the electromagnetic insulating layer, thereby creating a contact surface which can be brought into electrically conductive contact with the contact surface of another battery housing component. This ensures, in particular, that a closed electromagnetically insulating shell is formed around the interior of the housing.

[0011] The battery housing component is part of a traction battery housing, which is designed to accommodate at least one battery component. The battery components are preferably designed as battery cells. It is also possible for the battery components to be designed as battery modules. The battery housing can be configured to accommodate the at least one battery component in a cavity created by the at least one battery housing component.

[0012] Preferably, the traction battery housing is designed for a traction battery of an electrically powered motor vehicle. Preferably, the traction battery housing is mountable to the body of a motor vehicle. The housing wall can be a structural component of the battery housing component, which partially delimits a receiving space formed by the traction battery housing. The housing wall can at least partially delimit a receiving space for accommodating a plurality of battery components.

[0013] The housing wall comprises a plastic. The housing wall can comprise more than 50%, preferably more than 70%, and more preferably more than 90% plastic. In an advantageous embodiment, the housing wall consists exclusively of one plastic or a combination of several plastics. The plastic is preferably a thermoplastic. More preferably, the plastic comprises polypropylene (PP), polyamides (PA), in particular polyamide 6, polystyrene (PS), polyethylene (PE), polybutylene terephthalate (PBT), or acrylonitrile butadiene styrene (ABS). Preferably, the plastic is fiber-reinforced. The fibers in the plastic matrix material are preferably glass fibers and / or carbon fibers and / or aramid fibers. The fiber material is preferably designed as long fiber and / or short fiber and / or continuous fiber material.

[0014] If the plastic is fiber-reinforced, it can be particularly tough and at the same time shock-resistant, which offers advantages in terms of fixing the electromagnetic insulating layer.

[0015] The battery housing component may have a grounding device that can be electrically connected to the battery components, and a connection device that extends through the housing wall.

[0016] An electromagnetic insulating layer can be a component that prevents or greatly reduces the propagation of electromagnetic fields. In particular, an electromagnetic insulating layer can serve as electromagnetic shielding. An electromagnetic insulating layer can be a component that exhibits high electrical insulation capacity and / or high permeability. An electromagnetic insulating layer can consist of a metal, in particular copper, aluminum, steel, or a mu-metal. An electromagnetic insulating layer can consist of a conductive polymer, in particular poly-3,4-ethylenedioxythiophene (PEDOT), polyaniline (PAni), polyparaphenylene (PPP), polyyrrole (PPy), or doped polythiophene (PT)).

[0017] If the electromagnetic insulating layer is made of a metal, it can enable particularly reliable contact at the contact surface. If the electromagnetic insulating layer is made of a conductive polymer, it can conform particularly well to the contour of the housing wall.

[0018] The electromagnetic insulating layer can have a thickness ranging from 0.1 mm to 3 mm, preferably from 0.5 mm to 2 mm, and more preferably from 0.2 mm to 0.5 mm. This allows the electromagnetic insulating layer to bond particularly well with the housing wall and to conform particularly well to the contour of the housing wall.

[0019] The fact that the housing wall substantially surrounds the electromagnetic insulating layer can mean that one front or one back side of the electromagnetic insulating layer is completely covered, and the other side of the electromagnetic insulating layer is predominantly covered, by the housing wall material. The fact that the housing wall substantially surrounds the electromagnetic insulating layer can also mean that the electromagnetic insulating layer is substantially embedded in the housing wall. The housing wall has a circumferential connection device, preferably designed as a connecting flange. "Currently" here can mean that the connection device is arranged in a region of the battery housing component that defines the contact area of ​​the battery housing component with another battery housing component."Perimeter-encircling" here can mean that the connecting device surrounds a receiving space formed by the battery housing in its assembled state. The connecting device may be designed to enable a connection, particularly a detachable one, with another battery housing component. The connecting device may be a part of the housing body that does not form a boundary surface of the receiving space of the battery housing.

[0020] The contact surface can be a continuous area. This can have the advantage of a particularly reliable connection. However, the contact surface can also have interruptions. This can have the advantage of a particularly good fit to the contour of the housing wall.

[0021] Accessible from the outside can mean that the electromagnetic insulating layer is not covered by the housing wall in places on at least, preferably exactly, one of its sides and is therefore contactable at least in the unmounted state of the battery housing component without the use of aids.

[0022] According to an advantageous embodiment, the contact surface extends along the connecting element around the entire housing wall. This can offer the advantage of particularly reliable contact. If the contact surface extends along the connecting element around the entire housing wall, this can mean that the contact surface runs along or parallel to a center of gravity line of the connecting element.

[0023] The contact surface can extend continuously along the connection device. This can offer the advantage of particularly reliable contact. The contact surface can extend without meandering along the connection device. This can also offer the advantage of particularly reliable contact.

[0024] According to an advantageous embodiment, the contact surface is ribbon-shaped. This can have the advantage of particularly reliable contacting of the contact surface.

[0025] Band-shaped here can mean that the contact area has a length extent and a width extent, where the length extent of the contact area is significantly larger than the width extent of the contact area.

[0026] According to an advantageous embodiment, the electromagnetic insulating layer is continuous. This can offer the advantage of particularly high shielding.

[0027] Continuous here can mean that the area formed by the electromagnetically insulating layer is closed.

[0028] According to an advantageous embodiment, the electromagnetic insulating layer has a plurality of through-openings. This allows the housing wall material to penetrate the through-openings and thus reach both sides of the electromagnetic insulating layer during the manufacturing process, resulting in advantages regarding the bondability between the electromagnetic insulating layer and the housing wall.

[0029] A through-opening can be any opening or gap in the electromagnetically insulating layer. The opening can have any shape, and in particular be round, oval, rectangular, or polygonal.

[0030] The through-openings can each have a free cross-sectional area in the range between 0.008 mm². 2 and 1600 mm 2 , preferably in the range between 0.008 mm 2 and 80 mm 2 exhibit .

[0031] According to an advantageous embodiment, the electromagnetically insulating layer is designed as a fabric. This can offer advantages with regard to the bondability between the electromagnetically insulating layer and the housing wall, as well as with regard to its adaptability to the contour of the housing wall.

[0032] A fabric can be a structure created by weaving, interlacing, or linking threads, wires, or other flexible elements, forming a structured, flexible, and planar arrangement.

[0033] The fabric may contain metal wires. Preferably, the fabric may be made entirely of metal wires. In this case, the fabric may also be referred to as a metal wire fabric.

[0034] A metal wire can have a round, oval, or essentially flat cross-sectional shape. In particular, a wire can also be a strip.

[0035] According to an advantageous embodiment, the electromagnetically insulating layer has warp threads extending along a warp direction and weft threads extending along a weft direction, wherein the clear width between the warp and weft threads is between 0.5 mm and 5 mm, preferably between 0.7 mm and 4 mm, more preferably between 1 mm and 3 mm, and more preferably between 1.5 mm and 2.5 mm. Such a clear width has the effect that material from the housing wall can penetrate between the gaps thus formed during the manufacturing process and reach the other side of the electromagnetically insulating layer, resulting in advantages regarding the bondability between the electromagnetically insulating layer and the housing wall. Furthermore, advantages can arise regarding the adaptability to the contour of the housing wall.

[0036] The clear width can refer to the distance between adjacent warp and / or weft threads in the fabric. In particular, it can refer to the average of all distances between adjacent warp and / or weft threads in the fabric.

[0037] The warp direction can take any angle to the weft direction. In a preferred embodiment, the warp direction and the weft direction can form an angle of 90°.

[0038] According to an advantageous embodiment, the warp direction and / or the weft direction form an angle of 40° to 50°, preferably an angle of 45°, to a longitudinal direction and / or a lateral direction of the battery housing component. This allows the electromagnetically insulating layer to conform particularly well to the contour of the housing wall.

[0039] The longitudinal direction can be the direction along which the battery housing component has its maximum length or principal axis. The lateral direction can be the direction along which the battery housing component has its greatest width or transverse axis. The longitudinal and lateral directions can be at right angles to each other.

[0040] In another embodiment, only a portion of the warp threads and / or weft threads are offset along their respective warp and weft directions by an angle of 40° to 50° to a longitudinal and / or lateral direction of the battery housing component, while another portion of the warp and / or weft threads has a different, in particular parallel, orientation to the longitudinal and / or lateral direction of the battery housing component.

[0041] According to an advantageous embodiment, the battery housing component has an insulating layer, wherein the insulating layer is attached to an inner side of the housing wall and, in particular, the area of ​​the connection device is free of the insulating layer, and wherein the insulating layer consists of a long-fiber-reinforced plastic and / or a continuous-fiber-reinforced plastic. This prevents the formation of an arc between the battery component and the electromagnetically insulating layer.

[0042] An insulating layer can, in particular, consist of or comprise an electrically non-conductive material. In particular, the insulating layer can have a dielectric strength of more than 800 volts, preferably more than 1000 volts, and more preferably more than 1200 volts. The insulating layer can consist of a plastic, in particular a fiber-reinforced plastic. The insulating layer can preferably comprise long fibers and / or continuous fibers. The insulating layer can preferably comprise glass fibers and / or aramid fibers. Preferably, the volume fraction of the fibers in the insulating layer is between 0.2 and 0.8, more preferably between 0.3 and 0.7, and more preferably between 0.4 and 0.6.

[0043] An inner wall of the housing can be that part of the surface of the housing wall which forms the boundary of the receiving space of the battery housing.

[0044] The present invention also aims to provide a method for manufacturing a battery housing component which enables a particularly secure connection between the electromagnetic insulating layer and the housing body as well as particularly good contactability of the contact surface.

[0045] The problem underlying the present invention is solved by a method for manufacturing a previously described battery housing component, wherein the method comprises the following steps:

[0046] - Introducing an electromagnetically insulating layer and a heated plastic mass into a forming tool, preferably an extrusion tool,

[0047] - Forming the introduced electromagnetic insulating layer and the heated plastic mass, resulting in a housing wall with a circumferential connecting device, wherein the housing wall substantially surrounds the electromagnetic insulating layer and wherein the electromagnetic insulating layer extends at least partially into the area of ​​the connecting device,

[0048] - Removal, preferably by means of laser radiation, of at least part of the housing wall in the area of ​​the connection device, so that part of the electromagnetic insulating layer is exposed and an electrically conductive contact surface is created. The electromagnetic insulating layer can preferably be introduced into the forming tool undeformed, in particular planar.

[0049] "Heated" here can mean that the plastic mass is heated above room temperature. In particular, it can mean that the plastic mass is heated to a temperature greater than 100 °C, preferably greater than 140 °C, and more preferably in a range between 180 °C and 240 °C.

[0050] The heated plastic mass can be introduced into the forming tool in such a way that, before forming, it is only located on one side of the electromagnetically insulating layer. This can offer advantages in terms of manufacturing costs.

[0051] The heated plastic mass can also be applied in such a way that it is located on both sides of the electromagnetically insulating layer before forming. This can have advantages regarding the bondability of the electromagnetically insulating layer and the housing wall.

[0052] When material is removed using laser radiation, this can be achieved by vaporization, melting, or ablation. The laser radiation can be generated by a CO2 laser, a fiber laser, a neodymium-doped yttrium aluminum garnet laser (Nd laser), a semiconductor laser, or a UV-emitting laser. In particular, the laser radiation can be generated by a high-frequency pulsed solid-state laser with line optics. When part of the housing wall is removed, the plastic layer covering the electromagnetic insulating layer of the housing wall is removed, so that the electromagnetic insulating layer in the area of ​​the connection device is at least partially exposed and electrically contactable from the outside.The present invention also aims to provide a traction battery housing that enables particularly secure electromagnetic shielding while also having a low weight.

[0053] The problem underlying the present invention is solved by a traction battery housing comprising at least one previously described first battery housing component and a second battery housing component connectable to the first battery housing component, wherein the first battery housing component and the second battery housing component together form a receiving volume for receiving at least one battery component.

[0054] The second battery housing component can take any shape and form. In one embodiment, the second battery housing component is a lid that covers a volume defined by the first battery housing component.

[0055] The traction battery housing can have at least one connecting element which extends through one of a plurality of connecting openings of the first battery housing component and the second battery housing component, thus connecting the two battery housing components to each other.

[0056] According to an advantageous embodiment, the traction battery housing has at least one electrically conductive seal, wherein the electrically conductive seal is arranged between the contact surface of the first battery housing component and a contact surface of the second battery housing component and is elastically deformed, in particular compressed, in the assembled state of the traction battery housing, whereby the electrically conductive seal establishes an electrically conductive contact between the two contact surfaces of the first battery housing component and the second battery housing component. This ensures that sufficient electrical contact exists between the contact surfaces of the two battery housing components, thus providing advantages with regard to the electromagnetic shielding of the traction battery housing.

[0057] An electrically conductive seal can be a device that exhibits high electrical conductivity and deformability, preferably elastic deformability. The electrically conductive seal can be designed to physically bridge a gap existing in the assembled state of the traction battery housing between the contact surface of the first battery housing component and the contact surface of the second battery housing component, thus establishing an electrically conductive connection between the two contact surfaces.

[0058] According to an advantageous embodiment, the second battery housing component is also designed according to the invention. This allows for particularly efficient and reliable electromagnetic shielding of the traction battery housing.

[0059] In particular, the first and second battery housing components can be identical in design. In another embodiment, the traction battery housing can consist of more than two battery housing components, which can also be identical in design. This allows for cost advantages and particularly reliable electromagnetic shielding.

[0060] According to an advantageous embodiment, the electrically conductive seal is elastically deformable and, in particular, comprises an elastically deformable wire mesh and / or wire knit. This allows for a particularly reliable electrically conductive connection between the individual battery housing components, thus improving the electromagnetic shielding of the traction battery housing.

[0061] The term "elastically deformable" here refers to the macrogeometry of the electrically conductive seal and goes beyond the elastic deformability inherent in any material. Elastically deformable can mean that the electrically conductive seal can be deformed in at least one spatial direction by more than 10%, preferably by more than 25%, without exceeding the local yield strength at any point. The elastic deformability can be based, in particular, on the geometry of the electrically conductive seal.

[0062] According to an advantageous embodiment, the traction battery housing has a fluid seal located in the area of ​​the connection points of the first and second battery housing components. The fluid seal is positioned closer to an outer edge surrounding the traction battery housing than the electromagnetically insulating layer. This prevents moisture from penetrating the interior of the traction battery housing and interfering with the contact surfaces of the respective battery housing components. This results in advantages regarding the reliability of the electromagnetic shielding of the traction battery housing. Furthermore, a traction battery housing designed accordingly has the advantage that the battery components arranged within it can be more easily temperature-controlled using a cooling fluid, since the cooling fluid cannot escape from the traction battery housing.For example, the battery components arranged in the traction battery housing can be temperature-controlled by means of immersion cooling. A fluid seal can be designed to protect the traction battery housing in its assembled state from the ingress of liquids, especially oil or water. Furthermore, a fluid seal can be designed to protect the traction battery housing in its assembled state from the leakage of liquids, e.g., cooling fluids, from the traction battery housing. The fluid seal can be made of an elastomer.

[0063] Preferably, the fluid seal is arranged closer to the outer edge surrounding the traction battery housing than the electrically conductive seal.

[0064] The fluid seal can be located in an area of ​​the connection device where the electrically conductive layer does not extend. This can offer advantages regarding the sealing of the traction battery housing. Furthermore, this can offer advantages regarding the electromagnetic shielding of the traction battery housing.

[0065] The fact that the fluid seal is located closer to an outer edge surrounding the traction battery housing than the electromagnetic insulating layer may mean that the part of the electromagnetic insulating layer that is closest to the outer edge is further from the outer edge than the part of the fluid seal that is furthest from the outer edge.

[0066] The present invention also aims to provide a traction battery which enables particularly secure electromagnetic shielding.

[0067] This problem underlying the present invention is solved by a traction battery for a motor vehicle, comprising a traction battery housing as described above and at least one battery component which is arranged in a receiving volume of the traction battery housing.

[0068] The traction battery can be designed to be attached to a motor vehicle, in particular to the body of a motor vehicle.

[0069] The present invention also aims to provide a motor vehicle which has a particularly safe traction battery.

[0070] This problem underlying the present invention is solved by a motor vehicle having a traction battery as described above.

[0071] Further advantages, details and features of the invention will become apparent from the illustrated examples below.

[0072] Specifically, they show:

[0073] Figure 1: a top view of an inventive battery housing component in three embodiment variants in the image parts a ), b ) and c );

[0074] Figure 2: a sectional view of a device according to the invention

[0075] Battery housing component along section line A;

[0076] Figure 3: a sectional view of a flow forming tool set up for a method according to the invention for manufacturing a battery housing component; Figure 4: a flow diagram of a method according to the invention for manufacturing a battery housing component;

[0077] Figure 5: a sectional view of a device according to the invention

[0078] traction battery housing; and

[0079] Figure 6: a 3D representation of an electrically conductive

[0080] Seal.

[0081] In the following description, identical reference symbols denote identical components or identical features, so that a description given for one component in relation to one figure also applies to the other figures, thus avoiding repetitive descriptions. Furthermore, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0082] Figure 1 shows a top view of a battery housing component 1 according to the invention for a traction battery housing 2, which is designed to receive at least one battery component 3. The battery housing component 1 has a housing wall 4 made of plastic and at least one electromagnetically insulating layer 5, wherein the housing wall 4 substantially surrounds the electromagnetically insulating layer 5. The housing wall 4 has a circumferential connecting element 6 designed as a connecting flange, which is configured for connection with a further battery housing component 1.The electromagnetic insulating layer 5 extends at least partially into the area of ​​the connection device 6, wherein the battery housing component 1 has an electrically conductive contact surface 7 in the area of ​​the connection device 6, on which the electromagnetic insulating layer 5 is directly accessible and in particular not covered by the housing wall 4.

[0083] In the sectional view of the battery housing component shown in Figure 2, it can be seen that the electromagnetic insulating layer is essentially surrounded by the housing wall.

[0084] In the embodiment shown in Figure 1, it is provided that the contact surface 7 extends around the entire housing wall 4 along the connecting device 6.

[0085] Furthermore, in the embodiment shown in Figure 1, the contact surface 7 is formed in a band shape.

[0086] The image parts a ), b ) and c ) of Figure 1 show different embodiments of the battery housing component 1 .

[0087] According to the embodiment shown in Figure aa), the electromagnetically insulating layer 5 is formed continuously.

[0088] According to the embodiment shown in Figure 1b), the electromagnetically insulating layer 5 has a plurality of through-openings 8.

[0089] According to the embodiment shown in Figure 1c), the electromagnetically insulating layer 5 is designed as a fabric.

[0090] In one embodiment, the electromagnetically insulating layer 5 has warp threads 9 extending along a warp direction K and has weft threads 10 extending along a weft direction S, wherein the clear width between the warp threads 9 and the weft threads 10 is between 0.5 mm and 5 mm, preferably between 0.7 mm and 4 mm, more preferably between 1 mm and 3 mm, and more preferably between 1.5 mm and 2.5 mm.

[0091] In one embodiment, it is provided that the warp direction K and / or the weft direction S form an angle of 40° to 50°, preferably an angle of 45°, to a longitudinal extension direction L and / or a lateral extension direction B of the battery housing component 1.

[0092] In one embodiment, the battery housing component 1 is provided to have an insulating layer 11. The insulating layer 11 is attached to an inner surface 12 of the housing wall 4, and in particular the area of ​​the connecting device 6 is free of the insulating layer 11. The insulating layer 11 consists of a long-fiber-reinforced plastic and / or a continuous-fiber-reinforced plastic.

[0093] Figure 3 shows a sectional view of a flow forming tool 14 set up for carrying out a method for manufacturing a battery housing component 1, into which heated plastic mass 13 and an undeformed electromagnetic insulating layer 5 were introduced.

[0094] Figure 4 shows a flowchart for a method for manufacturing a battery housing component 1 according to the invention. The method is provided to comprise the following steps:

[0095] - Introducing an electromagnetically insulating layer 5 and a heated plastic mass 13 into a forming tool 14, preferably into an extrusion tool 14 ,

[0096] - Forming the introduced electromagnetic insulating layer 5 and the heated plastic mass 13, resulting in a housing wall 4 with a circumferential connecting device 6, wherein the housing wall 4 substantially surrounds the electromagnetic insulating layer 5 and wherein the electromagnetic insulating layer 5 extends at least partially into the area of ​​the connecting device 6,

[0097] - Removing, preferably by means of laser radiation, at least a part of the housing wall 4 in the area of ​​the connection device 6, so that a part of the electromagnetically insulating layer 5 is exposed and an electrically conductive contact surface 7 is created.

[0098] Figure 5 shows an embodiment of a traction battery housing according to the invention, comprising at least one first battery housing component 1 according to the invention and a second battery housing component 1 connectable to the first battery housing component 1, wherein the first battery housing component 1 and the second battery housing component 1 together form a receiving volume 15 for receiving at least one battery component 3.

[0099] In one embodiment, it can be provided that the second battery housing component 1 is designed according to the invention.

[0100] In one embodiment, the traction battery housing 2 is provided to have at least one electrically conductive seal 16, wherein the electrically conductive seal 16 is arranged between the contact surface 7 of the first battery housing component 1 and a contact surface 7 of the second battery housing component 1 and is elastically deformed, in particular compressed, in the assembled state of the traction battery housing 2. The electrically conductive seal 16 establishes an electrically conductive contact between the two contact surfaces 7 of the first battery housing component 1 and the second battery housing component 1.

[0101] Figure 6 shows such an electrically conductive seal 16. In one embodiment, the electrically conductive seal 16 is elastically deformable and, in particular, comprises an elastically deformable wire mesh and / or wire knit. In another embodiment, also shown in Figure 5, the traction battery housing 2 has a fluid seal 17, which is arranged in the area of ​​the connecting devices 6 of the first battery housing component 1 and the second battery housing component 1, wherein the fluid seal 17 is arranged closer to an outer edge 18 surrounding the traction battery housing than the electromagnetically insulating layer 5.

[0102] Reference symbol list

[0103] 1 Battery housing component

[0104] 2 traction battery housings

[0105] 3 Battery component

[0106] 4 Housing wall

[0107] 5 Electromagnetically insulating layer

[0108] 6 Connection device

[0109] 7 contact area

[0110] 8 through openings

[0111] 9 warp threads

[0112] 10 shots of thread

[0113] 11 I isolation layer

[0114] 12 Inside

[0115] 13 plastic masses

[0116] 14 Forming tool

[0117] 15 recording volume

[0118] 16 Electrically conductive seal

[0119] 17 Fluid seal

[0120] 18 outer edge

Claims

Patent claims 1. Battery housing component (1) for a traction battery housing (2) which is designed to accommodate at least one battery component (3), wherein the battery housing component (1) has a housing wall (4) comprising a plastic and at least one electromagnetically insulating layer (5), wherein the housing wall (4) substantially surrounds the electromagnetically insulating layer (5), wherein the housing wall (4) has a circumferential connecting device (6), which is preferably designed as a connecting flange, and which is designed for connection with a further battery housing component (1), characterized in that the electromagnetically insulating layer (5) extends at least partially into the area of ​​the connecting device (6), and the battery housing component (1) has an electrically conductive contact surface (7) in the area of ​​the connecting device (6).where the electromagnetic insulating layer (5) is directly accessible and, in particular, is not covered by the housing wall (4).

2. Battery housing component (1) according to claim 1, characterized in that the contact surface (7) extends around the entire housing wall (4) along the connecting device (6).

3. Battery housing component (1) according to one of claims 1 or 2, characterized in that the contact surface (7) is formed in a band shape.

4. Battery housing component (1) according to one of claims 1 to 3, characterized in that the electromagnetically insulating layer (5) is continuous.

5. Battery housing component (1) according to one of claims 1 to 3, characterized in that the electromagnetically insulating layer (5) has a plurality of through-openings (8).

6. Battery housing component (1) according to one of claims 1 to 3, characterized in that the electromagnetically insulating layer (5) is designed as a fabric.

7. Battery housing component (1) according to claim 6, characterized in that the electromagnetically insulating layer (5) has warp threads (9) extending along a warp direction K and weft threads (10) extending along a weft direction S, wherein the clear width between the warp threads (9) and the weft threads (10) is between 0.5 mm and 5 mm, preferably between 0.7 mm and 4 mm, more preferably between 1 mm and 3 mm, and more preferably between 1.5 mm and 2.5 mm.

8. Battery housing component (1) according to claim 7, characterized in that the warp direction K and / or the weft direction S form an angle of 40° to 50°, preferably an angle of 45°, to a longitudinal extension direction L and / or a lateral extension direction B of the battery housing component (1).

9. Battery housing component (1) according to one of claims 1 to 8, characterized in that the battery housing component (1) has an insulating layer (11), wherein the insulating layer (11) is on an inner side (12) is attached to the housing wall (4) and in particular the area of ​​the connection device (6) is free from the insulating layer (11), wherein the insulating layer (11) consists of a long fiber reinforced plastic and / or an endless fiber reinforced plastic.

10. Method for manufacturing a battery housing component (1) according to any one of claims 1 to 9, characterized in that the method comprises the following steps: Introducing an electromagnetically insulating layer (5) and a heated plastic mass (13) into a forming tool (14), preferably into an extrusion tool (14), forming the introduced electromagnetically insulating layer (5) and the heated plastic mass (13) , resulting in a housing wall (4) with a circumferential connecting device (6), wherein the housing wall (4) substantially surrounds the electromagnetically insulating layer (5) and wherein the electromagnetically insulating layer (5) extends at least partially into the area of ​​the connecting device (6), Removing, preferably by means of laser radiation, at least a part of the housing wall (4) in the area of ​​the connection device (6) so that a part of the electromagnetic insulating layer (5) is exposed and an electrically conductive contact surface (7) is created.

11. Traction battery housing (2) comprising at least one first battery housing component (1) according to one of claims 1 to 9 and a second battery housing component connectable to the first battery housing component (1), wherein the first battery housing component (1) and the second battery housing component together form a receiving volume (15) for receiving at least one battery component (3).

12. Traction battery housing (2) according to claim 11, characterized in that the traction battery housing (2) has at least one electrically conductive seal (16), wherein the electrically conductive seal (16) is arranged between the contact surface (7) of the first battery housing component (1) and a contact surface (7) of the second battery housing component and is elastically deformed, in particular compressed, in the assembled state of the traction battery housing (2), wherein the electrically conductive seal (16) establishes an electrically conductive contact between the two contact surfaces (7) of the first battery housing component (1) and the second battery housing component (1).

13. Traction battery housing (2) according to one of claims 11 or 12, characterized in that the second battery housing component (1) is designed according to one of claims 1 to 9.

14. Traction battery housing (2) according to claim 12, characterized in that the electrically conductive seal (16) is elastically deformable and in particular has an elastically deformable wire mesh and / or wire knitting.

15. Traction battery housing (2) according to one of claims 11 to 14, characterized in that the traction battery housing (2) has a fluid seal (17) which is located in the area of ​​the connecting devices (6) of the first battery housing component (1) and the second battery housing component (1) is arranged, wherein the fluid seal (17) is arranged closer to an outer edge (18) surrounding the traction battery housing than the electromagnetic insulating layer (5) .

16. Traction battery for a motor vehicle, comprising a traction battery housing (2) according to one of claims 11 to 15 and at least one battery component (3) which is arranged in a receiving volume (15) of the traction battery housing (2).

17. Motor vehicle comprising a traction battery according to claim 16.

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