Battery shell assembly, traction battery shell, traction battery and motor vehicle with traction battery

Abstract

The invention relates to a battery housing arrangement (20) for a traction battery housing (10), which is designed to accommodate at least one battery assembly, the battery housing arrangement (20) having an outer layer (21) containing plastic and at least one shielding layer (22) containing metal, the shielding layer (22) substantially covering the entire inner surface (23) of the outer layer (21), and the shielding layer (22) being arranged in the outer layer (21). The shielding layer (22) and the outer layer (21) are connected in a form-fitting manner. Further, the invention relates to a traction battery housing having at least one battery housing assembly, to a traction battery having a traction battery housing, and to a motor vehicle having a traction battery.

Description

Technical Field

[0001] This invention relates to a battery housing assembly for a traction battery housing. Further, this invention relates to a traction battery housing for accommodating at least one battery assembly. Additionally, this invention relates to a traction battery for a motor vehicle and a motor vehicle equipped with a traction battery. Background Technology

[0002] Traction batteries used in motor vehicles typically have a metal casing. This casing also acts as a Faraday cage, preventing electromagnetic radiation from escaping from the casing into the external environment, and also preventing electromagnetic radiation from the external environment from entering the casing. Disadvantages of this casing design include its relatively high weight and insufficient thermal insulation. Therefore, in the event of thermal runaway, such as when a battery cell or module experiences thermal runaway, a large amount of heat released from the casing can be released into the environment and towards the passenger compartment, resulting in a very high risk of passenger injury in motor vehicles equipped with such casings. Furthermore, heat generated during events such as vehicle fires or other fires can also be transferred to the casing, potentially damaging the battery components housed within.

[0003] Plastic traction battery housings are significantly lighter and at least comparable to, or even superior to, aluminum traction battery housings in terms of structural integrity. However, plastic traction battery housings have a drawback: they only provide less than ideal protection against intrusive electromagnetic radiation from the battery components within their enclosure. Furthermore, the electromagnetic radiation generated by the battery components within this enclosure is essentially released directly into the external environment without any filtering.

[0004] To address this issue, a known approach in the prior art is to deposit an aluminum layer on the outer surface of a plastic traction battery casing. However, this type of traction battery casing has a drawback: the aluminum layer is susceptible to chemical and physical environmental influences and therefore cannot maintain long-term stability. Summary of the Invention

[0005] The purpose of this invention is to provide a battery housing assembly for traction battery housings that has a lighter weight and improved, long-term stable electromagnetic radiation isolation effect.

[0006] The solution of the present invention to achieve this objective is a battery housing assembly having the features of claim 1. Advantageous embodiments of this battery housing assembly are described in the dependent claims of claim 1.

[0007] More specifically, the object of the present invention is achieved by a battery housing assembly for traction battery housing, the battery housing being designed to house at least one battery assembly, wherein the battery housing assembly has a plastic outer layer and at least one metal shielding layer, wherein the shielding layer substantially covers the entire inner surface of the outer layer, and wherein the shielding layer is connected to the outer layer in a form-fitting manner.

[0008] The battery housing assembly according to the invention has the advantage that, despite its light weight, it provides excellent and long-term stable protection against electromagnetic radiation intrusion into a traction battery housing equipped with the battery housing assembly according to the invention. Furthermore, the battery housing assembly according to the invention also has the advantage that, despite its light weight, it provides excellent and long-term stable protection against electromagnetic radiation leakage from a traction battery housing equipped with the battery housing assembly according to the invention. In addition, the battery housing assembly according to the invention also has the advantage of providing an improved thermal barrier effect.

[0009] Preferably, the battery housing assembly is designed as a battery housing tray, a battery housing cover, or a vehicle underbody protection device.

[0010] Battery components, for example, refer to battery cells or battery modules.

[0011] When the battery housing assembly is in the assembled state, that is, when the battery housing assembly is assembled in the battery housing or assembled with the battery housing, the outer layer constitutes the surface layer of the battery housing.

[0012] When the battery housing assembly is in the assembled state, that is, when the battery housing assembly is assembled in the battery housing or assembled with the battery housing, the shielding layer faces the receiving space of the battery housing.

[0013] Preferably, the shielding layer is made of metal. More preferably, the shielding layer is made of aluminum, iron, or steel. According to the invention, there are no limitations on the choice of metal material.

[0014] According to the present invention, the feature that the shielding layer substantially covers the entire inner surface of the outer layer means that the area enclosed by the outline surrounding the shielding layer substantially covers the entire inner surface of the outer layer. Therefore, according to the present invention, the feature that the shielding layer substantially covers the entire inner surface of the outer layer also means that the shielding layer may have one or more through-holes. Even if the shielding layer has one or more through-holes, the feature that "the shielding layer substantially or preferably completely covers the entire inner surface of the outer layer" is still satisfied.

[0015] The shielding layer can be directly connected to the outer layer in a form-fit manner. This eliminates the need for an adhesive layer between the shielding layer and the outer layer.

[0016] The shielding layer can have a thickness extension between 0.1 mm and 3 mm, preferably between 0.5 mm and 2 mm, and more preferably between 0.2 mm and 0.5 mm. This allows the shielding layer to be manufactured with reduced material usage and therefore with reduced weight.

[0017] The outer plastic layer may be made of polypropylene (PP), polyamide (PA), fiber-reinforced plastic composite (SMC, the abbreviation for sheet molding compound), glass fiber reinforced PA, and / or glass fiber reinforced PP. According to the present invention, there are no limitations on the choice of plastic.

[0018] Preferably, the battery housing assembly is configured such that the shielding layer has a plurality of through-holes, wherein the material of the outer layer extends at least partially into the through-holes of the shielding layer.

[0019] The advantage of this battery housing assembly is that the shielding layer is connected to the outer layer in a form-fitting manner in a modified and simplified way.

[0020] Each through-hole can have a free cross-section, the area of ​​which is less than or equal to the area of ​​a circular plane with a diameter between 0.1 mm and 45 mm. Preferably, each through-hole can have a free cross-section, the area of ​​which is less than or equal to the area of ​​a circular plane with a diameter of 10 mm, and more preferably a circular plane with a diameter of 8 mm. This allows for the achievement of good electromagnetic shielding effect with a smaller amount of shielding material.

[0021] The cross-section of the through hole can be constructed as an ellipse, an egg, a rhombus, a rectangle, or a square, for example.

[0022] Preferably, the cross-section of the through-hole is constructed to be circular. This allows for a further reduction in the amount of shielding material used while achieving better electromagnetic shielding performance. Since a circle has the smallest perimeter-to-area ratio compared to other geometries, it further reduces the amount of shielding material used without negatively impacting the electromagnetic shielding effect.

[0023] Preferably, the battery housing assembly is configured such that the material of the outer layer passes through the through-hole and engages the through-hole at the rear.

[0024] The advantage of this battery housing assembly construction is that the shielding layer is connected to the outer layer in a form-fitting manner in a further improved way. Because the material of the outer layer penetrates and forms a through-hole at the rear, a riveted connection can be formed between the outer layer and the shielding layer.

[0025] Preferably, the battery housing assembly is configured such that the through holes each have a tapered cross-section at least in a portion of their respective longitudinal extensions, wherein the free diameter of each through hole begins at the contact surface of the shielding layer that contacts the inner surface of the outer layer and gradually increases toward the surface of the shielding layer opposite to the contact surface.

[0026] The advantage of this battery housing assembly is that the shielding layer is connected to the outer layer in a form-fitting manner in a further improved way, while at the same time it can be manufactured in a simplified manner. Since the form-fitting connection can be achieved without the outer layer material penetrating through and forming a through hole at the rear, the shielding layer can be positioned in a simplified manner, for example, as an embedded part, during the manufacturing process.

[0027] Preferably, the battery housing assembly is configured such that the shielding layer is configured as a grid, preferably a stretched grid.

[0028] The advantage of this battery housing assembly structure is that the shielding layer can be manufactured with less material, resulting in a further reduction in the weight of the battery housing assembly. Furthermore, the molding process for the shielding layer can be significantly simplified.

[0029] Preferably, the battery housing assembly is configured such that it has a heat insulation layer connected to a shielding layer, wherein the shielding layer is sandwiched between the outer layer and the heat insulation layer.

[0030] The advantage of this battery housing assembly structure is that it provides better thermal insulation.

[0031] Preferably, the insulation layer is made of an insulating nonwoven fabric. However, the invention is not limited to this specific embodiment of the insulation layer. The insulation layer may also be made of, or contain, knitted, woven, or similar materials.

[0032] The insulation layer can be connected to the shielding layer through material matching and / or shape matching and / or force matching. In particular, the insulation layer can be connected to the shielding layer by riveting, nailing, screwing or other connection methods.

[0033] Preferably, the battery housing assembly is configured such that it has a metal protective layer connected to the heat insulation layer, wherein the heat insulation layer is sandwiched between the shielding layer and the metal protective layer.

[0034] The advantages of this battery casing assembly structure are that it provides stronger electromagnetic shielding and better protection against mechanical factors that could affect it. Furthermore, this structure also offers enhanced tolerance to high temperatures, such as those generated during thermal runaway of individual battery cells.

[0035] Preferably, the metal protective layer is made of aluminum, iron, steel, or stainless steel. According to the invention, there are no limitations on the choice of metal material.

[0036] Preferably, the metal protective layer has a thickness extension of less than or equal to 0.25 mm, more preferably less than or equal to 0.15 mm. This allows for improved electromagnetic shielding and mechanical protection while further reducing the weight of the battery casing assembly.

[0037] The metal protective layer can be connected to the insulation layer through material fit and / or shape fit and / or force fit. In particular, the metal protective layer can be connected to the insulation layer by riveting, nailing, screwing or other connection methods.

[0038] Preferably, the battery housing assembly is configured such that it has a plastic protective layer connected to a metal protective layer, wherein the metal protective layer is sandwiched between the heat insulation layer and the plastic protective layer.

[0039] The advantage of this battery housing assembly is that it forms an electrical isolation layer between the metal protective layer and the electrical components (e.g., high-voltage cables, high-voltage interfaces, battery cells) inside the traction battery housing, which has a correspondingly constructed battery housing assembly. Furthermore, this battery housing assembly also offers the advantage of providing better protection against chemical influences, especially against corrosion caused by the components of the battery components arranged within the housing space.

[0040] Preferably, the plastic protective layer contains polypropylene (PP), polyethylene (PE), ethylene-vinyl acetate copolymer (EVA), polyamide (PA), polyethylene terephthalate (PET), and / or thermoplastic polyurethane (TPU).

[0041] The plastic protective layer can be connected to the metal protective layer through material fit and / or shape fit and / or force fit. Specifically, the plastic protective layer can be connected to the metal protective layer by riveting, nailing, screwing, or other connection methods. Furthermore, the plastic protective layer can be connected to the metal protective layer using an adhesion promoter, particularly a heat-activated adhesion promoter, or by adhesive.

[0042] The outer layer, shielding layer, heat insulation layer, metal protective layer, and plastic protective layer can be connected to each other by riveting, nailing, screwing, or other connection methods to form an integrated component. The integrated component thus formed can have a thickness extension of less than or equal to 3 mm, preferably less than or equal to 2 mm.

[0043] Preferably, the battery housing assembly is configured to have a connecting device on its edge side, which is preferably configured as a connecting flange and designed for connection to another battery housing assembly.

[0044] The advantage of this battery housing assembly is that it can be connected to another battery housing assembly in a simplified manner.

[0045] Preferably, the connecting device is configured as a coherent connecting device surrounding the receiving space at least partially defined by the battery housing assembly on the edge side.

[0046] The connecting device may have a receiving recess, wherein the receiving recess is designed to receive at least one sealing device.

[0047] The receiving recess can be configured as a continuous receiving recess surrounding a receiving space at least partially defined by the battery housing assembly.

[0048] The depth extension of the receiving recess is less than the thickness extension of at least one shielding layer. This allows for an improved mechanical connection between the two battery housing assemblies and the sealing device by enhancing the compression of the sealing device.

[0049] The sealing device can be positioned within the receiving recess. This allows for higher positioning accuracy of the sealing device within the battery housing assembly.

[0050] The sealing device can be configured as a continuous sealing device surrounding a receiving space at least partially defined by the battery housing assembly. This allows for a better seal of the receiving space.

[0051] Preferably, the connecting device has at least one protrusion. This improves the direct contact between the shielding layer covering the connecting device and the surface opposite to the shielding layer. In particular, the opposite surface can be configured as another shielding layer covering the connecting device of another battery housing assembly. This improves the conductive contact between the two shielding layers.

[0052] Preferably, the battery housing assembly is configured such that the connecting device is integrally and / or monolithically formed with the outer layer, wherein the shielding layer covers at least a portion of the connecting device.

[0053] The advantage of this battery housing assembly structure is that the outer layer and the battery housing assembly itself can be manufactured in a simplified manner, especially since the manufacturing process can be completed during production.

[0054] Two interconnected components are molded in one piece. In particular, the two interconnected components are seamlessly connected.

[0055] The present invention also aims to provide a traction battery housing for a traction battery, which has a lighter weight and an improved, long-term stable electromagnetic radiation isolation effect.

[0056] This objective of the invention is achieved by a traction battery housing having the features of claim 11 for accommodating at least one battery assembly. Advantageous designs are described in the dependent claims of claim 11.

[0057] More specifically, the object of the present invention is achieved by a traction battery housing for accommodating at least one battery assembly, wherein the traction battery housing has at least one of the aforementioned battery housing assemblies.

[0058] The advantages of this traction battery housing construction are that it provides excellent and long-term stable protection against electromagnetic radiation intrusion while maintaining a relatively light weight. Furthermore, this traction battery housing construction also provides excellent and long-term stable protection against electromagnetic radiation leakage from the traction battery housing while maintaining a relatively light weight. In addition, the traction battery housing according to the present invention also has the advantage of providing an improved thermal barrier effect.

[0059] The traction battery housing can have a metal or metal-containing housing assembly. According to the invention, there are no limitations on the choice of metal material.

[0060] Preferably, the connection between the housing assembly and the battery housing assembly is such that the housing assembly is electrically connected to the shielding layer of the battery housing assembly directly or indirectly. The advantage of this traction battery housing configuration is that it forms a conductive cage that defines a confined space, which enhances the electromagnetic shielding effect of the traction battery housing.

[0061] Preferably, the traction battery housing is configured such that the traction battery housing has two battery housing assemblies as described above, which are interconnected and form a receiving space for accommodating at least one battery assembly.

[0062] The advantages of this traction battery housing design are that it provides excellent and long-term stable protection against electromagnetic radiation intrusion while also reducing weight. Furthermore, this traction battery housing design also offers the advantage of excellent and long-term stable protection against electromagnetic radiation leakage from the traction battery housing while further reducing weight.

[0063] Preferably, the traction battery housing is configured such that it has two battery housing assemblies, each having the following characteristics: - The battery housing assembly has a connection device on the edge side, which is preferably configured as a connection flange and designed for connection to another battery housing assembly; - The connecting device is integrally molded with the outer layer and / or individually molded; - The shielding layer covers at least a portion of the connecting device.

[0064] The two battery housing assemblies are interconnected in such a way that their respective connecting devices are interconnected, and the shielding layers covering each connecting device are arranged opposite to each other.

[0065] The advantage of this traction battery housing design is that it can be manufactured in a simplified manner while still ensuring excellent protection against electromagnetic radiation intrusion into and emission from the housing into the surrounding environment. Furthermore, the design maximizes the available space for housing the battery modules.

[0066] Preferably, the traction battery housing is configured such that it has at least one sealing device disposed between the connecting means of two battery housing assemblies, wherein the two battery housing assemblies are interconnected by means of a plurality of connecting elements, each of which passes through the connecting means and applies opposing forces thereto. In a cross-section through the traction battery housing and the interconnecting connecting means, at least one sealing device is disposed between the connecting elements and shielding layers arranged opposite to each other.

[0067] The advantage of this traction battery housing design is that it allows for an improved connection between the two battery housing assemblies, resulting in enhanced sealing.

[0068] The two battery housing assemblies can be interconnected such that their respective connecting devices are interconnected, the shielding layers covering each connecting device are arranged opposite each other, and the receiving recesses are arranged opposite each other. The advantage of this traction battery housing configuration is that the sealing device can be better positioned between the two connecting devices, thereby achieving a further enhanced sealing effect.

[0069] The sealing device can be made of plastic.

[0070] In the plane passing through the traction battery housing and the interconnecting connecting devices, the cross-section of the sealing device can be partially circular, circular, rectangular, square, or double-circular. A double-circular design can be understood as a sideways figure-eight shape. In other words, a double-circular design can have two circles arranged side-by-side and interconnected in the plane passing through the traction battery housing and the interconnecting connecting devices, particularly in a single-unit connection. Each circle can be constructed as a sealing device segment. In other words, a sealing device with a double-circular structure can have at least two sealing device segments.

[0071] The connecting element can be constructed as a screw, rivet, bolt or other connecting element, preferably of the conductive type.

[0072] Preferably, the traction battery housing is configured such that the shielding layers covering the various connecting devices are in direct contact with each other.

[0073] The advantages of this traction battery housing design are that it provides better electromagnetic radiation shielding. Simultaneously, the corresponding design offers improved mechanical stability because the shielding layers of each connecting component are in direct contact with each other.

[0074] Preferably, the shielding layers that partially cover each connecting device are in direct planar contact with each other. This configuration of the traction battery housing has the advantage of achieving better conductive contact between the various shielding layers.

[0075] Each connecting device in the battery housing tray may have at least one protrusion. This improves the direct contact between the various shielding layers.

[0076] Preferably, the traction battery housing is configured such that the shielding layers covering each connecting device are spaced apart from each other, wherein at least one sealing device has a conductive sealing device section, wherein the shielding layer covering each connecting device is in direct conductive contact with the sealing device section.

[0077] The advantage of this traction battery housing structure is that it provides better electromagnetic radiation isolation while simultaneously allowing the application of specified forces by multiple connecting elements.

[0078] A section of a conductive sealing device can be constructed as a metal mesh arranged around a section of the sealing device.

[0079] The present invention also aims to provide a traction battery for motor vehicles that has a lighter weight and an improved, long-term stable electromagnetic radiation isolation effect.

[0080] This fundamental objective of the invention is achieved by a traction battery for a motor vehicle having the features of claim 17.

[0081] More specifically, the solution of the present invention to achieve the above-mentioned objective is a traction battery for a motor vehicle, wherein the traction battery has the aforementioned traction battery housing and at least one battery component arranged in a receiving space of the traction battery housing.

[0082] The present invention also aims to provide a motor vehicle with a traction battery that has a lighter weight and an improved, long-term stable electromagnetic radiation isolation effect.

[0083] This fundamental objective of the invention is achieved by a motor vehicle having a traction battery having the features of claim 18. Attached Figure Description

[0084] Further advantages, details, and features of the present invention can be obtained from the embodiments described below. Specifically: Figure 1 A schematic cross-sectional view of a battery housing assembly according to a first embodiment of the present invention is shown; Figure 2 A top view schematic diagram of a battery housing assembly according to a second embodiment is shown; Figure 3 A schematic cross-sectional view of a battery housing assembly according to a third embodiment is shown; Figure 4 A cross-sectional schematic diagram of the connection region of the battery housing assembly according to the fourth embodiment is shown; Figure 5 A cross-sectional schematic diagram of the connection region of the battery housing assembly according to the fifth embodiment is shown; Figure 6 A cross-sectional schematic diagram of a battery housing assembly according to a sixth embodiment is shown; Figure 7 A cross-sectional schematic diagram of the traction battery housing in the connection device region according to the seventh embodiment is shown, and Figure 8 A cross-sectional schematic diagram of the traction battery housing in the connection device region of the traction battery housing according to the eighth embodiment is shown. Detailed Implementation

[0085] In the following description, the same reference numerals denote the same components or features; therefore, a description of a component with reference to one drawing also applies to other drawings to avoid repetition. Furthermore, features described in connection with one embodiment may also be used individually in other embodiments.

[0086] Figure 1A cross-sectional view of a battery housing assembly 20 according to a first embodiment is shown. The battery housing assembly 20 is configured as a battery housing cover 20. The battery housing assembly 20 has a plastic-containing outer layer 21 and a metal-containing shielding layer 22, wherein the shielding layer 22 substantially covers the entire inner surface 23 of the outer layer 21. The shielding layer 22 is connected to the outer layer 21 in a form-fit manner.

[0087] Figure 2 A top view of a battery housing assembly 20 according to a second embodiment is shown. The battery housing assembly 20 is configured as a battery housing cover 20. The shielding layer 22 has a plurality of through holes 24. In the illustrated embodiment, the through holes 20 have a circular cross-section, wherein, according to the invention, there is no limitation on the shape of the through holes.

[0088] The shielding layer 22 substantially covers the entire inner surface 23 of the outer layer 21. In other words, the area of ​​the outer layer 21 covered by the shielding layer 22 is surrounded by the outline 221 that surrounds the shielding layer 22.

[0089] In addition, the battery housing assembly 20 has an edge-side connection device 30, which is designed to connect to another battery housing assembly 20.

[0090] Figure 3 A cross-sectional schematic diagram of the battery housing assembly 20 according to a third embodiment is shown. The battery housing assembly 20 is configured as a battery housing tray 20. The connecting device 30 is configured as a connecting flange 31. Further, the connecting flange 31 is monolithically formed with the outer layer 21, and the shielding layer 22 covers at least a portion of the connecting flange 31.

[0091] The connecting flange 31 is configured as a continuous connecting flange 31 surrounding the receiving space 40 on the edge side. The battery housing assembly 20 at least partially surrounds the receiving space 40 of the battery housing assembly 20.

[0092] Figure 4 A cross-sectional schematic diagram of the connection region of the battery housing assembly 20 according to the fourth embodiment is shown. The shielding layer 22 and the outer layer 21 are connected to each other in the connection region.

[0093] The material of the outer layer 21 penetrates the through-hole 24 of the shielding layer 22, and is then unfolded behind the through-hole 21 to engage with the through-hole 24 of the shielding layer 22. This forms a riveted connection, by which the outer layer 21 and the shielding layer 22 are connected to each other.

[0094] Figure 5 A schematic cross-sectional view of the battery housing assembly 20 according to the fifth embodiment is shown in the connection region, in which the shielding layer 22 is connected to the outer layer 21.

[0095] The material of the outer layer 21 extends at least partially into the through-holes 24 of the shielding layer 22. Each of the through-holes 24 in the shielding layer 21 has a tapered cross-section, at least in a portion of its respective longitudinal extension, wherein the free diameter of each through-hole 24 gradually increases from the contact surface 25 of the shielding layer 22 that contacts the inner surface 23 of the outer layer 21 towards the surface of the shielding layer 22 opposite to the contact surface 25. Thus, the material of the outer layer 21 located in each through-hole 24 subsequently bonds to the shielding layer 22.

[0096] Figure 6 A cross-sectional schematic diagram of the battery housing assembly 20 according to the sixth embodiment is shown.

[0097] The battery housing assembly 20 has a heat insulation layer 26 connected to the shielding layer 22. Here, the shielding layer 22 is sandwiched between the outer layer 21 and the heat insulation layer 26.

[0098] The battery housing assembly 20 further has a metal protective layer 27 connected to the heat insulation layer 26. Here, the heat insulation layer 26 is sandwiched between the shielding layer 22 and the metal protective layer 27.

[0099] The battery housing assembly 20 further has a plastic protective layer 28 connected to the metal protective layer 27. Here, the metal protective layer 27 is sandwiched between the heat insulation layer 26 and the plastic protective layer 28.

[0100] The outer layer 21, shielding layer 22, heat insulation layer 26, metal protective layer 27 and plastic protective layer 28 together constitute an integrated component.

[0101] Figure 7 A cross-sectional schematic diagram of the traction battery housing 10 according to a seventh embodiment of the present invention is shown.

[0102] The traction battery housing 10 for accommodating at least one battery assembly has two battery housing assemblies 20, which are interconnected to form a accommodating space 40 for accommodating at least one battery assembly. Each battery housing assembly 20 is configured as a battery housing tray 20. Each battery housing tray 20 has a connection device 30 configured as a connection flange 31.

[0103] The two battery housing assemblies 20 are connected to each other such that their respective connecting flanges 31 are connected to each other, and the shielding layers 22 covering each connecting flange 31 are arranged opposite to each other.

[0104] Furthermore, the traction battery housing 10 further includes a sealing device 50 arranged between the connecting flanges 31 of the two battery housing assemblies 20. The two battery housing assemblies 20 are interconnected by a plurality of connecting elements 60, each of which passes through the connecting flange 31 of the battery housing assembly 20 and applies opposing forces thereto. Figure 7 In the cross-sectional view of the traction battery housing 10 shown, the sealing device 50 is arranged between the connecting element 60 and the shielding layer 22 arranged opposite to each other.

[0105] In the illustrated embodiment, the sealing device 50 has a square cross-section in the cross-section passing through the traction battery housing 10 and the interconnecting connecting flange 31. However, the invention is not limited to the above-described geometry of the sealing device 50. For example, the sealing device 50 may also have a circular cross-sectional geometry.

[0106] The shielding layers 22 covering each connecting flange 31 are in direct contact with each other. Thus, the shielding layers 22 are directly electrically connected to each other.

[0107] Figure 8 A schematic cross-sectional view of the traction battery housing 10 according to an eighth embodiment of the present invention is shown. Figure 8 In the embodiment shown, the connecting device 30 of each battery housing assembly 20 is also configured as a connecting flange 31.

[0108] The shielding layers 22 covering each connecting flange 31 are arranged at intervals. At least one sealing device 50 has a conductive sealing device section 51. From Figure 8 As can be seen, the shielding layer 22 covering each connecting flange 31 is in direct conductive contact with the sealing device section 51.

[0109] Each battery housing assembly 20 has a heat insulation layer 26, a metal protective layer 27, and a plastic protective layer 28. The heat insulation layer 26 is connected to the shielding layer 22. The metal protective layer 27 is connected to the heat insulation layer 26, and the plastic protective layer 28 is connected to the metal protective layer 27. The shielding layer 22 is sandwiched between the outer layer 21 and the heat insulation layer 26. The heat insulation layer 26 is sandwiched between the shielding layer 22 and the metal protective layer 27. The metal protective layer 27 is sandwiched between the heat insulation layer 26 and the plastic protective layer 28. Thus, the plastic protective layer 28 directly faces the receiving space 40 formed by the battery housing assembly 20.

[0110] List of reference numerals

[0111] 10 Traction battery casing

[0112] 20 Battery housing assembly

[0113] 21 Outer layer

[0114] 22 Shielding layer

[0115] 221 (Outline of the shielding layer)

[0116] 23 (Outer layer) Inner surface

[0117] 24 through holes

[0118] 25 (Shielding layer) Contact surface

[0119] 26. Insulation layer

[0120] 27 Metal protective layer

[0121] 28 Plastic protective layer

[0122] 30 Connecting device

[0123] 31 Connecting flange

[0124] 40 storage space

[0125] 50 Sealing device

[0126] 51 Sealing Device Section

[0127] 60 Connecting elements.

Claims

1. A battery housing assembly (20) for a traction battery housing (10), said traction battery housing (10) being designed to accommodate at least one battery assembly, wherein, The battery housing assembly (20) has -Contains a plastic outer layer (21) and - At least one metal-containing shielding layer (22). - wherein the shielding layer (22) substantially covers the entire inner surface (23) of the outer layer (21), and -The shielding layer (22) and the outer layer (21) are connected in a shape-fitting manner.

2. The battery housing assembly (20) according to claim 1, characterized in that: - The shielding layer (22) has multiple through holes (24); and - The material of the outer layer (21) extends at least partially into the through-hole (24) of the shielding layer (22).

3. The battery housing assembly (20) according to claim 2, characterized in that, The material of the outer layer (21) penetrates the through hole (24) and is joined to the through hole (24) at the rear.

4. The battery housing assembly (20) according to claim 2 or 3, characterized in that, The through holes (24) each have a tapered cross section at least on a portion of their respective longitudinal extensions, wherein the free diameter of each through hole (24) begins from the contact surface (25) of the shielding layer (22) that contacts the inner surface (23) of the outer layer (21) and gradually increases toward the surface of the shielding layer (22) opposite to the contact surface (25).

5. The battery housing assembly (20) according to any one of the preceding claims, characterized in that, The shielding layer (22) is constructed as a grid, preferably a stretched grid.

6. The battery housing assembly (20) according to any one of the preceding claims, characterized in that: - The battery housing assembly (20) has a heat insulation layer (26) connected to the shielding layer (22); and - The shielding layer (22) is sandwiched between the outer layer (21) and the heat insulation layer (26).

7. The battery housing assembly (20) according to claim 6, characterized in that: - The battery housing assembly (20) has a metal protective layer (27) connected to the heat insulation layer (26); and - The heat insulation layer (26) is sandwiched between the shielding layer (22) and the metal protective layer (27).

8. The battery housing assembly (20) according to claim 7, characterized in that: - The battery housing assembly (20) has a plastic protective layer (28) connected to the metal protective layer (27); and - The metal protective layer (27) is sandwiched between the heat insulation layer (26) and the plastic protective layer (28).

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

10. The battery housing assembly (20) according to claim 9, characterized in that: - The connecting device (30) is integrally and / or monolithically formed with the outer layer (21); and - The shielding layer (22) covers at least a portion of the connecting device (30).

11. A traction battery housing (10) for accommodating at least one battery assembly, having at least one battery housing assembly (20) according to any one of claims 1 to 10.

12. The traction battery housing (10) according to claim 11, characterized in that, The traction battery housing (10) has two battery housing assemblies (20) according to any one of claims 1 to 10, the battery housing assemblies (20) being interconnected and forming a receiving space (40) for accommodating the at least one battery assembly.

13. The traction battery housing (10) according to claim 11, characterized in that: - The traction battery housing (10) has two battery housing assemblies (20) according to claim 10 respectively; and - The two battery housing assemblies (20) are connected to each other such that the respective connecting devices (30) of the two battery housing assemblies (20) are connected to each other, and the shielding layer (22) covering the respective connecting devices (30) is arranged opposite to each other.

14. The traction battery housing (10) according to claim 13, characterized in that: - The traction battery housing (10) has at least one sealing device (50), which is arranged between the connecting devices (30) of the two battery housing assemblies (20); - The two battery housing assemblies (20) are interconnected by a plurality of connecting elements (60), each of the plurality of connecting elements (60) passing through the connecting device (30) and applying opposing forces to the connecting device (30); and - In a cross section passing through the traction battery housing (10) and the interconnected connecting device (30), at least one sealing device (50) is arranged between the connecting element (60) and the shielding layer (22) arranged opposite to each other.

15. The 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 each other.

16. The traction battery housing (10) according to claim 14, characterized in that: - The shielding layers (22) covering the respective connecting devices (30) are arranged at intervals from each other; - The at least one sealing device (50) has a conductive sealing device section (51); and - The shielding layer (22) covering the respective connecting devices (30) is in direct conductive contact with the sealing device section (51).

17. A traction battery for a motor vehicle, having a traction battery housing (10) according to any one of claims 11 to 16 and at least one battery assembly disposed within a receiving space (40) of the traction battery housing (10).

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

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