Battery housing component, traction battery housing, traction battery, and motor vehicle comprising traction battery

Abstract

The invention relates to a battery housing component (20) for a traction battery housing (10) which is designed to receive at least one battery component. The battery housing component (20) has an outer layer (21) which has a plastic and at least one shielding layer (22) which has a metal, wherein the shielding layer (22) substantially covers the entire inner surface (23) of the outer layer (21), and the shielding layer (22) is connected to the outer layer (21) in a form-fitting manner. The invention additionally relates to a traction battery housing having at least one battery housing component, to a traction battery having a traction battery housing, and to a motor vehicle having a traction battery.

Description

[0001] Page 1 / 31 Applicant: KAUTEX TEXTRON GmbH & Co. KG Our reference: P80809DE March 31, 2023 Battery housing component, traction battery housing, traction battery and motor vehicle with traction battery The present invention relates to a battery housing component for a traction battery housing. Furthermore, the present invention relates to a traction battery housing for accommodating at least one battery component. Furthermore, the present invention relates to a traction battery for a motor vehicle and a motor vehicle with a traction battery. Traction batteries for motor vehicles generally have a traction battery housing made of metal. Appropriately designed traction battery housings also function as a Faraday cage, so that electromagnetic radiation is neither emitted from a receiving volume of the traction battery housing to the outside world, nor does electromagnetic radiation from the outside world penetrate into the interior of the traction battery housing.The disadvantages of appropriately designed traction battery housings are their high weight and their inadequate properties as a heat barrier. Heat released within the battery housing volume, for example, in the event of thermal runaway of battery cells or battery modules, is also dissipated to a very large extent into the environment and thus also towards the passenger compartment, which greatly increases the risk of injury to passengers in a motor vehicle with an appropriately designed traction battery housing. Furthermore, heat generated, for example, in the event of a vehicle fire or other fire, is also transferred to a large extent into the receiving volume of an appropriately designed traction battery housing, so that battery components arranged within the traction battery housing can be damaged. Traction battery housings made of plastic have a significantly reducedThey have a low weight and, in terms of their structural integrity, are at least equal to, if not superior to, aluminum traction battery housings. However, plastic traction battery housings have the disadvantage that they provide poor protection for battery components located in the receiving volume of the traction battery housing against the effects of penetrating electromagnetic radiation. Furthermore, electromagnetic radiation generated by battery components located in the receiving volume is emitted to the outside world essentially unfiltered. To solve this problem, it is known from the prior art to provide an outer surface of a plastic traction battery housing with an aluminum layer. However, a correspondingly designed traction battery housing has the disadvantage that the aluminum layer is exposed to chemical and physical environmental influences and is therefore not long-term stable.The present invention is based on the object of providing a battery housing component for a traction battery housing, which has a low weight and an improved and long-term stable insulation effect for electromagnetic radiation. The object underlying the present invention is achieved by a battery housing component with the features of claim 1 of the present invention. Advantageous embodiments of the battery housing component are described in the claims dependent on claim 1. In more detail, the object underlying the present invention is achieved by a battery housing component for a traction battery housing, which is designed to accommodate at least one battery component, wherein the battery housing component has an outer layer comprising a plastic and at least one shielding layer comprising a metal, wherein the shielding layer essentiallycovers an entire inner surface of the outer layer, and wherein the shielding layer is positively connected to the outer layer. The battery housing component according to the invention has the advantage that, despite its low weight, it has an excellent and long-term stable protective effect against the penetration of electromagnetic radiation into a traction battery housing comprising the battery housing component according to the invention. Furthermore, the battery housing component according to the invention has the advantage that, despite its low weight, it has an excellent and long-term stable protective effect against the escape of electromagnetic radiation from a traction battery housing comprising the battery housing component according to the invention. Furthermore, the battery housing component according to the invention has the advantage that it has an improved thermal barrier effect. The battery housing component is preferably designed as a battery housing shell or asBattery housing cover or designed as underbody protection. The battery component is, for example, a battery cell or a battery module. Page 4 / 31 P80809DE The outer layer forms an outer layer of the battery housing in the assembled state of the battery housing component, i.e. when the battery housing component is assembled in or to the battery housing. The shielding layer faces a receiving volume of the battery housing in the assembled state of the battery housing component, i.e. when the battery housing component is assembled in or to the battery housing. The shielding layer is preferably made of a metal. Preferably, the shielding layer is made of aluminum, iron, or steel. According to the invention, there are no restrictions with regard to the selection of the metal. The feature according to which the shielding layer covers substantially the entire inner surface of the outer layer means, according to the invention, that a surface whichis enclosed by a contour line enclosing the shielding layer, essentially covers the entire inner surface of the outer layer. Consequently, the feature according to which the shielding layer essentially covers the entire inner surface of the outer layer also means, according to the invention, that the shielding layer can have one or a plurality of through-openings. Even if the shielding layer has one or a plurality of through-openings, the feature is met that the shielding layer essentially or preferably completely covers the entire inner surface of the outer layer. The shielding layer can be directly connected to the outer layer in a form-fitting manner. This eliminates the need for an adhesion promoter layer between the shielding layer and the outer layer. The shielding layer can have a thickness in a range from 0.1 mm to 3 mm, preferably in a range from 0.5 mm to 2 mm, and more preferably in a range from 0.2 mm to 0.5 mm. Page 5 / 31 P80809DEThe shielding layer can be manufactured with reduced material usage and thus with reduced weight. The plastic of the outer layer can be formed as a polypropylene (PP), as a polyamide (PA), as a fiber-plastic composite (SMC; English abbreviation for Sheet Molding Compound), as a glass fiber reinforced PA and / or as a glass fiber reinforced PP. According to the invention, there are no restrictions regarding the selection of the plastic. Preferably, the battery housing component is designed such that the shielding layer has a plurality of through-openings, wherein material of the outer layer extends at least partially into the through-openings of the shielding layer. A battery housing component designed in this way has the advantage that the shielding layer is positively connected to the outer layer in an improved and simplified manner. The through-openings can each have a free cross-sectional area of ​​less than or equal toan area corresponding to a circular area with a diameter between 0.1 mm and 45 mm. Preferably, the through-openings can each have a free cross-sectional area of ​​less than or equal to an area corresponding to a circular area with a diameter of 10 mm, preferably a circular area with a diameter of 8 mm. This allows a good electromagnetic shielding effect of the shielding layer to be achieved while simultaneously using little material for the shielding layer. The cross-sectional areas of the through-openings can, for example, be designed as an ellipse, an oval, a rhombus, a rectangle, or a square. Page 6 / 31 P80809DE The cross-sectional areas of the through-openings are preferably designed as circular areas. This allows an improved electromagnetic shielding effect of the shielding layer to be achieved while simultaneously using even less material for the shielding layer. Since a circle inCompared to other geometric shapes, the smallest ratio of circumference to area allows for even greater savings in the material of the shielding layer without negatively affecting the electromagnetic shielding effect. Preferably, the battery housing component is designed such that the material of the outer layer extends through the through-openings and engages behind the through-openings. A battery housing component designed in this way has the advantage that the shielding layer is connected to the outer layer in an even better form-fitting manner. Because the material of the outer layer extends through and engages behind the through-openings, a riveted connection can be formed between the outer layer and the shielding layer. Preferably, the battery housing component is designed such that the through-openings each have a conical cross-sectional shape at least over part of their respective longitudinal extents, wherein theincrease the respective free diameter of the through-openings from a contact surface of the shielding layer that is in contact with the inner surface of the outer layer to a surface of the shielding layer opposite the contact surface. A battery housing component designed in this way has the advantage that the shielding layer is further improved in its form-fitting connection with the outer layer and, at the same time, can be manufactured more easily. Because a form-fitting connection can be achieved without the material of the outer layer having to protrude through and engage behind the through-openings, the shielding layer can be positioned more easily, for example as an insert, in a manufacturing process. Preferably, the battery housing component is designed in such a way that the shielding layer is designed as a grid, preferably as an expanded metal grid. A battery housing component designed in this way has the advantage that theThe shielding layer can be produced with a further reduced use of material, so that the battery housing component has an even lower weight. Furthermore, the shaping of the shielding layer is made considerably easier. Preferably, the battery housing component is designed such that the battery housing component has a thermal insulation layer that is connected to the shielding layer, wherein the shielding layer is sandwiched between the outer layer and the thermal insulation layer. A battery housing component designed in this way has the advantage that the battery housing component has an improved thermal insulation effect. The thermal insulation layer is preferably designed as a thermal protection fleece. However, the present invention is not limited to a corresponding embodiment of the thermal insulation layer. The thermal insulation layer can also consist of a knitted fabric, a woven fabric or the like, or theseThe thermal insulation layer can be connected to the shielding layer in a materially bonded and / or form-fitting and / or force-fitting manner. Page 8 / 31 P80809DE. In particular, the thermal insulation layer can be connected to the shielding layer by means of rivets, tackers, screws, or other connecting means. Preferably, the battery housing component is designed such that the battery housing component has a metal protective layer that is connected to the thermal insulation layer, wherein the thermal insulation layer is arranged in a sandwich-like manner between the shielding layer and the metal protective layer. A battery housing component designed in this way has the advantage that the battery housing component has a further improved electromagnetic shielding effect and, at the same time, has an improved protective effect against mechanical influences on the battery housing component. Furthermore, a battery housing component designed in this way has the advantage that theBattery housing component has further improved resistance to high temperatures, which arise, for example, during thermal runaway of battery cells. The metal protective layer is preferably made of aluminum, iron, steel, or stainless steel. According to the invention, there are no restrictions on the selection of the metal. The metal protective layer preferably has a thickness of less than or equal to 0.25 mm, preferably less than or equal to 0.15 mm. This allows the weight of the battery housing component to be further reduced while simultaneously increasing the electromagnetic shielding effect and protection against mechanical impact. The metal protective layer can be bonded to the thermal insulation layer in a material-to-material and / or form-fitting and / or force-fitting manner. Page 9 / 31 P80809DE. In particular, the metal protective layer can be bonded to the thermal insulation layer by means of rivets, tackers, screws, or otherconnecting means. Preferably, the battery housing component is designed such that the battery housing component has a plastic protective layer which is connected to the metal protective layer, wherein the metal protective layer is sandwiched between the thermal insulation layer and the plastic protective layer. A battery housing component designed in this way has the advantage that an electrical insulation layer is formed between the metal protective layer and electrical components (e.g. high-voltage cables, high-voltage connections, battery cells) in the interior of a traction battery housing, which has a correspondingly designed battery housing component. Furthermore, a battery housing component designed in this way has the advantage that the battery housing component has an improved protective effect against chemical influences, in particular against corrosion, by components of in a receiving volumearranged battery components. The plastic protective layer preferably comprises a polypropylene (PP), a polyethylene (PE), an ethylene vinyl acetate (EVA), a polyamide (PA), a polyethylene terephthalate (PET) and / or a thermoplastic polyurethane (TPU). The plastic protective layer can be bonded to the metal protective layer in a material-to-material and / or form-fitting and / or friction-fitting manner. In particular, the plastic protective layer can be bonded to the metal protective layer by means of rivets, tacks, screws or other connecting means. Furthermore, the plastic protective layer can be bonded to the metal protective layer by means of an adhesion promoter, in particular a thermally activated adhesion promoter, or by means of adhesive bonding. Page 10 / 31 P80809DE The outer layer, the shielding layer, the thermal insulation layer, the metal protective layer and the plastic protective layer can be bonded to one another by means of rivets, tacks, screws or other connecting means and form a one-piececomponent. The one-piece component formed in this way can have a thickness of less than or equal to 3 mm, preferably less than or equal to 2 mm. The battery housing component is preferably designed such that it has an edge-side connecting device, which is preferably designed as a connecting flange and which is designed for connection to another battery housing component. A battery housing component designed in this way has the advantage that the battery housing component can be connected to another battery housing component in a simplified manner. The connecting device is preferably designed as a continuous connecting device which rotates around the edge around a receiving volume which is at least partially delimited by the battery housing component. The connecting device can have a receiving recess, wherein the receiving recess is designed to have at least oneSealing device. The receiving recess can be designed as a continuous receiving recess surrounding the receiving volume at least partially delimited by the battery housing component. The receiving recess has a smaller depth extension than the thickness extension of the at least one shielding layer. As a result, an improved mechanical connection between Page 11 / 31 P80809DE two battery housing components and a sealing device can be achieved by increased compression of the sealing device. The sealing device can be arranged in the receiving recess. As a result, an improved positioning accuracy of the sealing device in the battery housing component can be achieved. The sealing device can be designed as a continuous sealing device surrounding the receiving volume at least partially delimited by the battery housing component. As a result, theReceiving volume can be sealed better. The connecting device preferably has at least one elevation. This can improve direct contact between a shielding layer covering the connecting device and a surface opposite this shielding layer. In particular, the opposite surface can be designed as a further shielding layer of a further battery housing component covering a connecting device. This can improve electrically conductive contact between the two shielding layers. The battery housing component is preferably designed such that the connecting device is formed integrally and / or monolithically with the outer layer, wherein the shielding layer covers at least part of the connecting device. A battery housing component designed in this way has the advantage that the outer layer and thus the battery housing component can be manufactured in a simplified manner.can be manufactured, in particular in one production step. Page 12 / 31 P80809DE Two monolithically connected elements are made from one piece. In particular, two monolithically connected elements are connected to each other seamlessly. The present invention is also based on the object of providing a traction battery housing for a traction battery, which has a low weight and an improved and long-term stable insulation effect for electromagnetic radiation. This object underlying the present invention is achieved by a traction battery housing for accommodating at least one battery component with the features of claim 11. Advantageous embodiments are described in the claims dependent on claim 11. In more detail, the object underlying the present invention is achieved by a traction battery housing for accommodating at least one battery componentsolved, wherein the traction battery housing has at least one battery housing component described above. A traction battery housing designed in this way has the advantage of being lightweight while simultaneously providing excellent and long-term protection against the penetration of electromagnetic radiation into the traction battery housing. Furthermore, a traction battery housing designed in this way has the advantage of being lightweight while simultaneously providing excellent and long-term protection against the escape of electromagnetic radiation from the traction battery housing. Furthermore, the traction battery housing according to the invention has the advantage of having an improved thermal barrier effect. Page 13 / 31 P80809DE The traction battery housing can have a housing component that is formed from a metal or comprises a metal. With regard to the material selection of the metalThere are no restrictions according to the invention. The housing component is preferably connected to the battery housing component in such a way that the housing component is directly or indirectly electrically conductively connected to the shielding layer of the battery housing component. A traction battery housing designed in this way has the advantage that an electrically conductive cage is formed that delimits a receiving volume and improves the electromagnetic shielding effect of the traction battery housing. The traction battery housing is preferably designed in such a way that the traction battery housing has two battery housing components, each described above, which are connected to one another and form a receiving volume for receiving the at least one battery component. A traction battery housing designed in this way has the advantage that it has an even lower weight while simultaneously providing excellent and long-term stability.Protection against the penetration of electromagnetic radiation into the traction battery housing. Furthermore, a traction battery housing designed in this way has the advantage of being even lighter while simultaneously providing excellent and long-term protection against the escape of electromagnetic radiation from the traction battery housing. The traction battery housing is preferably designed such that the traction battery housing has two battery housing components, each having the following features: - the battery housing component has an edge-side connecting device, which is preferably designed as a connecting flange Page 14 / 31 P80809DE, and which is designed for connection to another battery housing component; - the connecting device is designed in one piece and / or monolithically with the outer layer; - the shielding layer covers at least part of the connectingThe two battery housing components are connected to one another in such a way that their respective connecting devices are connected to one another and the shielding layers covering the respective connecting devices are arranged opposite one another. A traction battery housing designed in this way has the advantage that it is easier to manufacture, while at the same time ensuring that the receiving volume or the receiving space of the correspondingly designed traction battery housing offers excellent protection against the penetration of electromagnetic radiation into the receiving volume and against the emission of electromagnetic radiation from the receiving volume to the surroundings of the traction battery housing. Furthermore, a correspondingly designed traction battery housing enables a maximization of the receiving volume for accommodating battery components. The traction battery housing is preferably designed in this wayThe traction battery housing has at least one sealing device arranged between the connecting devices of the two battery housing components, wherein the two battery housing components are connected to one another by means of a plurality of connecting elements, each of which projects through the connecting devices and exerts a force on them towards one another. In a cross-section through the traction battery housing and the connected connecting devices, the at least one sealing device is arranged between a connecting element and the shielding layers arranged opposite one another. A traction battery housing designed in this way has the advantage of achieving an improved connection between the two battery housing components, so that an improved sealing effect is achieved. The two battery housing components can be connected to one another in this way.be that their respective connecting devices are connected to one another and the shielding layers covering the respective connecting devices are arranged opposite one another and the respective receiving recesses are arranged opposite one another. A traction battery housing designed in this way has the advantage that a sealing device can be arranged more effectively between the two connecting devices, so that a further increased sealing effect is achieved. The sealing device can comprise a plastic. The cross-sectional area of ​​the sealing device in the plane of the cross section through the traction battery housing and the interconnected connecting devices can have a partial circle shape, a circle shape, a rectangular shape, a square shape, or a double circle shape. A double circle shape can be understood as a figure eight lying on its side. With otherIn other words, a double-circle shape can have two circular shapes that are arranged next to one another in the plane of the cross-section through the traction battery housing and the interconnected connecting devices and are connected to one another, in particular are monolithically connected to one another. Each of the circular shapes can be designed as a sealing device section. In other words, a sealing device having a double-circle shape can have at least two sealing device sections. The connecting elements can be designed as screws, rivets, bolts, or other connecting elements, preferably as electrically conductive ones. The traction battery housing is preferably designed such that the shielding layers covering the respective connecting devices are in direct contact with one another. A traction battery housing designed in this way has the advantage that theTraction battery housing has an improved shielding effect for electromagnetic radiation. At the same time, a correspondingly designed traction battery housing has improved mechanical stability, since the shielding layers of the respective connecting devices are in direct contact with one another. Preferably, the shielding layers partially covering the respective connecting devices are in direct surface contact with one another. A traction battery housing designed in this way has the advantage that an improved electrically conductive contact is achieved between the respective shielding layers. The respective connecting devices of the battery housing shells can each have at least one elevation. This can improve the direct contact between the respective shielding layers. The traction battery housing is preferably designed in such a way that the respectiveShielding layers covering the connecting devices are spaced apart from one another, wherein the at least one sealing device has a sealing device section that is electrically conductive, and wherein the shielding layers covering the respective connecting devices are in direct electrical contact with the sealing device section. A traction battery housing designed in this way has the advantage that the traction battery housing has an improved insulation effect for electromagnetic radiation and can simultaneously be subjected to a defined force applied by the plurality of connecting elements. The electrically conductive sealing device section can be designed as a metal mesh arranged around a section of the sealing device. The present invention is also based on the object of providing a traction battery for a motor vehicle,which has a low weight and an improved and long-term stable insulation effect for electromagnetic radiation. This object underlying the present invention is achieved by a traction battery for a motor vehicle with the features of claim 17. More specifically, the object underlying the present invention is achieved by a traction battery for a motor vehicle, wherein the traction battery has a traction battery housing as described above and at least one battery component that is arranged in a receiving volume of the traction battery housing. Page 18 / 31 P80809DE The present invention is also based on the object of providing a motor vehicle having a traction battery which has a low weight and an improved and long-term stable insulation effect for electromagnetic radiation. This object underlying the present invention is achieved by aMotor vehicle having a traction battery with the features of claim 18. Further advantages, details and features of the invention emerge below from the explained exemplary embodiments. In detail: Figure 1: a schematic cross-sectional view of a battery housing component according to the invention according to a first embodiment of the present invention; Figure 2: a schematic view of a battery housing component according to a second embodiment in a plan view; Figure 3: a schematic cross-sectional view of a battery housing component according to a third embodiment; Figure 4: a schematic cross-sectional view of a connecting region of a battery housing component according to a fourth embodiment; Figure 5: a schematic cross-sectional view of a connecting region of a battery housing component according to a fifth embodiment; Page 19 / 31 P80809DE Figure 6: aschematic cross-sectional view of a battery housing component according to a sixth embodiment; Figure 7: a schematic cross-sectional view of a traction battery housing in the region of the connecting devices of the traction battery housing according to a seventh embodiment, and Figure 8: a schematic cross-sectional view of a traction battery housing in the region of the connecting devices of the traction battery housing according to an eighth embodiment. In the following description, the same reference numerals designate the same components or the same features, so that a description given with reference to one figure regarding a component also applies to the other figures, thus avoiding repetitive description. Furthermore, individual features that were described in connection with one embodiment can also be used separately in other embodiments. Figure 1 shows a battery housing component 20 according to afirst embodiment in a cross-sectional view. The battery housing component 20 is designed as a battery housing cover 20. The battery housing component 20 has an outer layer 21 comprising a plastic and a shielding layer 22 comprising a metal, wherein the shielding layer 22 essentially covers an entire inner surface 23 of the outer layer 21. The shielding layer 22 is positively connected to the outer layer 21. Page 20 / 31 P80809DE Figure 2 shows a battery housing component 20 according to a second embodiment in a plan view. The battery housing component 20 is designed as a battery housing cover 20. The shielding layer 22 has a plurality of through-openings 24. In the illustrated embodiment, the through-openings 20 have a circular cross-section, wherein according to the invention there are no restrictions with regard to the shape of the through-openings. The shielding layer 22 essentially covers the entireInner surface 23 of the outer layer 21. In other words, the shielding layer 22 covers an area of ​​the outer layer 21 that is enclosed by a contour line 221 surrounding the shielding layer 22. The battery housing component 20 also has an edge-side connecting device 30 that is designed to connect to another battery housing component 20. Figure 3 shows a battery housing component 20 according to a third embodiment in a schematic cross-sectional view. The battery housing component 20 is designed as a battery housing shell 20. The connecting device 30 is designed as a connecting flange 31. Furthermore, the connecting flange 31 is formed monolithically with the outer layer 21 and the shielding layer 22 covers at least a part of the connecting flange 31. The connecting flange 31 is formed as a continuous connecting flange 31 which surrounds a receiving volume 40 at the edge.Battery housing component 20 at least partially delimits the receiving volume 40 of the battery housing component 20. Figure 4 shows a schematic cross-sectional view of a connection region of a battery housing component 20 according to page 21 / 31 P80809DE a fourth embodiment. In the connection region, the shielding layer 22 and the outer layer 21 are connected to one another. The material of the outer layer 21 extends through the through-openings 24 of the shielding layer 22 and engages behind the through-openings 24 of the shielding layer 22, with the material of the outer layer 21 spreading out again behind the through-openings 21. This creates riveted connections by means of which the outer layer 21 and the shielding layer 22 are connected to one another. Figure 5 shows a schematic cross-sectional view of a battery housing component 20 according to a fifth embodiment in a connection region in which the shielding layer 22 is connected to the outer layer 21. The material of the outer layer21 extends at least partially into the through-openings 24 of the shielding layer 22. The through-openings 24 of the shielding layer 21 each have a conical cross-sectional shape at least over part of their respective longitudinal extents, wherein the respective free diameters of the through-openings 24 increase from a contact surface 25 of the shielding layer 22, which is in contact with the inner surface 23 of the outer layer 21, towards a surface of the shielding layer 22 opposite the contact surface 25. Thus, the material of the outer layer 21 located in the respective through-openings 24 engages behind the shielding layer 22. Figure 6 shows a schematic cross-sectional view of a battery housing component 20 according to a sixth embodiment. The battery housing component 20 has a thermal insulation layer 26 which is connected to the shielding layer 22. The shielding layer 22 is sandwiched between the outer layer 21 and theThermal insulation layer 26 is arranged. Page 22 / 31 P80809DE The battery housing component 20 further comprises a metal protective layer 27 which is connected to the thermal insulation layer 26. The thermal insulation layer 26 is arranged in a sandwich-like manner between the shielding layer 22 and the metal protective layer 27. The battery housing component 20 further comprises a plastic protective layer 28 which is connected to the metal protective layer 27. The metal protective layer 27 is arranged in a sandwich-like manner between the thermal insulation layer 26 and the plastic protective layer 28. The outer layer 21, the shielding layer 22, the thermal insulation layer 26, the metal protective layer 27, and the plastic protective layer 28 are formed together as a one-piece component. Figure 7 shows a schematic cross-sectional illustration of a traction battery housing 10 according to a seventh embodiment of the present invention. The traction battery housing 10 for accommodating at least one battery component has twoBattery housing components 20, which are connected to one another and form a receiving volume 40 for receiving the at least one battery component. The battery housing components 20 are each designed as battery housing shells 20. Each battery housing shell 20 has a connecting device 30, which is each designed as a connecting flange 31. The two battery housing components 20 are connected to one another in such a way that their respective connecting flanges 31 are connected to one another and the shielding layers 22 covering the respective connecting flanges 31 are arranged opposite one another. Page 23 / 31 P80809DE The traction battery housing 10 further has a sealing device 50, which is arranged between the connecting flanges 31 of the two battery housing components 20. The two battery housing components 20 are connected to one another by means of a plurality of connecting elements 60, wherein theConnecting elements 60 each protrude through the connecting flanges 31 of the battery housing components 20 and apply force to them towards one another. In the cross-sectional view of the traction battery housing 10 shown in Figure 7, the sealing device 50 is arranged between a connecting element 60 and the oppositely arranged shielding layers 22. In the illustrated embodiment, the sealing device 50 has a square cross-section in the cross-section through the traction battery housing 10 and the interconnected connecting flanges 31. However, the present invention is not limited to a corresponding geometry of the sealing device 50. For example, the sealing device 50 can also have a round cross-sectional geometry. The shielding layers 22 covering the respective connecting flanges 31 are in direct contact with one another. The shielding layers 22 are thusdirectly electrically conductively connected to one another. Figure 8 shows a schematic cross-sectional view of a traction battery housing 10 according to an eighth embodiment. In the embodiment shown in Figure 8, the connecting devices 30 of the respective battery housing components 20 are also designed as connecting flanges 31. The shielding layers 22 covering the respective connecting flanges 31 are arranged at a distance from one another. The at least one sealing device 50 has a sealing device section 51 that is electrically conductive. It can be seen from Figure 8 that the shielding layers 22 covering the respective connecting flanges 31 are in direct electrical contact with the sealing device section 51. The respective battery housing components 20 each have a thermal insulation layer 26, a metal protective layer 27, and a plastic protective layer 28. The thermal insulation layers 26 areeach connected to the shielding layers 22. The metal protective layers 27 are each connected to the thermal insulation layers 26, and the plastic protective layers 28 are each connected to the metal protective layers 27. The shielding layers 22 are each arranged in a sandwich-like manner between the outer layers 21 and the thermal insulation layers 26. The thermal insulation layers 26 are each arranged in a sandwich-like manner between the shielding layers 22 and the metal protective layers 27. The metal protective layers 27 are each arranged in a sandwich-like manner between the thermal insulation layers 26 and the plastic protective layers 28. The plastic protective layers 28 thus directly face the receiving volume 40 formed by the battery housing components 20.

[0002] Page 25 / 31 P80809EN List of reference symbols 10 Traction battery housing 20 Battery housing component 21 Outer layer 22 Shielding layer 221 Contour line (of the shielding layer) 23 Inner surface (of the outer layer) 24 Through holes 25 Contact surface (of the shielding layer) 26 Thermal insulation layer 27 Metal protective layer 28 Plastic protective layer 30 Connecting device 31 Connecting flange 40 Receiving volume 50 Sealing device 51 Sealing device section 60 Connecting element

Claims

Page 26 / 31 Applicant: KAUTEX TEXTRON GmbH & Co. KG Our reference: P80809DE Patent claims 1. Battery housing component (20) for a traction battery housing (10), which is designed to accommodate at least one battery component, wherein the battery housing component (20) - has an outer layer (21) comprising a plastic and - at least one shielding layer (22) comprising a metal, - wherein the shielding layer (22) essentially covers an entire inner surface (23) of the outer layer (21), and - wherein the shielding layer (22) is positively connected to the outer layer (21).

2. Battery housing component (20) according to claim 1, characterized by the following features: - the shielding layer (22) has a plurality of through-openings (24); and - material of the outer layer (21) extends at least partially into the through-openings (24) of the shielding layer (22). 3.Battery housing component (20) according to claim 2, characterized in that the material of the outer layer (21) extends through the through-openings (24) and engages behind the through-openings (24).

4. Battery housing component (20) according to one of claims 2 or 3, characterized in that the through-openings (24) each have a conical cross-sectional shape at least over a part of their respective longitudinal extents, wherein the respective free diameters of the through-openings (24) extend from a contact surface (25) of the. Page 27 / 31 P80809DE Shielding layer (22), which is in contact with the inner surface (23) of the outer layer (21), towards a surface of the shielding layer (22) opposite the contact surface (25).

5. Battery housing component (20) according to one of the preceding claims, characterized in that the shielding layer (22) is designed as a grid, preferably as an expanded metal grid.

6. Battery housing component (20) according to one of the preceding claims, characterized by the following features: - the battery housing component (20) has a thermal insulation layer (26) which is connected to the shielding layer (22); and - the shielding layer (22) is arranged in a sandwich-like manner between the outer layer (21) and the thermal insulation layer (26). 7.Battery housing component (20) according to claim 6, characterized by the following features: - the battery housing component (20) has a metal protective layer (27) which is connected to the thermal insulation layer (26); and - the thermal insulation layer (26) is sandwiched between the shielding layer (22) and the metal protective layer (27).

8. Battery housing component (20) according to claim 7, characterized by the following features: - the battery housing component (20) has a plastic protective layer (28) which is connected to the metal protective layer (27); and. Page 28 / 31 P80809DE - the metal protective layer (27) is arranged in a sandwich-like manner between the thermal insulation layer (26) and the plastic protective layer (28).

9. Battery housing component (20) according to one of the preceding claims, characterized in that it has an edge-side connecting device (30), which is preferably designed as a connecting flange (31) and which is designed for connection to another battery housing component (20).

10. Battery housing component (20) according to claim 9, characterized by the following features: - the connecting device (30) is formed integrally and / or monolithically with the outer layer (21); and - the shielding layer (22) covers at least part of the connecting device (30).

11. Traction battery housing (10) for receiving at least one battery component, comprising at least one battery housing component (20) according to one of claims 1 to 10. 12.Traction battery housing (10) according to claim 11, characterized in that the traction battery housing (10) has two battery housing components (20) according to one of claims 1 to 10, which are connected to one another and form a receiving volume (40) for receiving the at least one battery component.

13. Traction battery housing (10) according to claim 11, characterized by the following features:. Page 29 / 31 P80809DE - the traction battery housing (10) has two battery housing components (20) according to claim 10, respectively; and - the two battery housing components () are connected to one another such that their respective connecting devices (30) are connected to one another and the shielding layers (22) covering the respective connecting devices () are arranged opposite one another. 14.Traction battery housing (10) according to claim 13, characterized by the following features: - the traction battery housing (10) has at least one sealing device (50) arranged between the connecting devices (30) of the two battery housing components (20); - the two battery housing components (20) are connected to one another by means of a plurality of connecting elements (60), each of which protrudes through the connecting devices (30) and applies force to them towards one another; and - in a cross-section through the traction battery housing (10) and the interconnected connecting devices (30), the at least one sealing device (50) is arranged between a connecting element (60) and the shielding layers (22) arranged opposite one another. 15.Traction battery housing (10) according to claim 14, characterized in that the shielding layers (22) covering the respective connecting devices (30) are in direct contact with one another.

16. Traction battery housing (10) according to claim 14, characterized by the following features:. Page 30 / 31 P80809DE - the shielding layers (22) covering the respective connecting devices (30) are spaced apart from one another; - the at least one sealing device (50) has a sealing device section (51) that is electrically conductive; and - the shielding layers (22) covering the respective connecting devices (30) are in direct electrical contact with the sealing device section (51).

17. A traction battery for a motor vehicle, comprising a traction battery housing (10) according to one of claims 11 to 16 and at least one battery component arranged in a receiving volume (40) of the traction battery housing (10).

18. A motor vehicle, comprising a traction battery according to claim 17.

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