Battery housing component, method for producing a battery housing component, battery housing, traction battery, and motor vehicle

Abstract

The invention relates to a battery housing component (1) having: - a receiving region (2) for receiving at least one battery component (3); and - a connecting region (4) that surrounds the receiving region (2) on the edge side for connecting to a further battery housing component, wherein the battery housing component (1) has: - a housing structural component (10) that delimits the battery housing component (1) to the outside; - an EMC protective component (20) that delimits a receiving space (5) of the battery housing component (1); and - a stabilising component (30) that is sandwiched between the housing structural component (10) and the EMC protective component (20); - wherein, in the receiving region (2) of the battery housing component (1), the stabilising component (30) is connected to the housing structural component (10) and the EMC protection component (20); and - wherein, in the connection region (4) of the battery housing component (1), the EMC protection component (20) is connected to the housing structural component (10) without the stabilising component (30) being interposed. The invention also relates to a method for producing a battery housing component (1) and to a battery housing (7), a traction battery and a motor vehicle.

Description

[0001] Page 1 / 36

[0002] Applicant: KAUTEX TEXTRON GmbH & Co. KG

[0003] Our reference number: P81110DE

[0004] December 19, 2024

[0005] Battery housing component, method for manufacturing a battery housing component, battery housing, traction battery and motor vehicle

[0006] The invention relates to a battery housing component. The invention further relates to a method for manufacturing a battery housing component. The invention further relates to a battery housing with at least one battery housing component. The invention further relates to a traction battery with a battery housing. The invention further relates to a motor vehicle with a traction battery.

[0007] In the automotive industry, efficient and safe solutions for battery housings in electric vehicles are becoming increasingly important. Currently, the battery enclosure in motor vehicles typically consists of a multi-part structure: a battery housing tray and a separate underbody protection panel each perform different protective functions.

[0008] The battery housing tray is usually shell-shaped and made of single-layer aluminum or steel. Its primary function is to securely position the battery cells and protect them in the horizontal directions (X and Y directions) from external impacts such as crush or crash scenarios. It also serves as protection against fire and electromagnetic radiation and ensures the housing's internal seal. Page 2 of 36

[0009] P81110DE

[0010] Underbody protection, on the other hand, is typically a flat structure mounted beneath the battery tray, primarily designed to protect the battery cells in the vertical direction (Z-direction). To ensure this protective function, the component is typically made of high-strength metallic materials that exhibit high rigidity and high energy absorption potential. It must also meet additional requirements such as protection against stone chips, corrosion, and fire.

[0011] These conventional, mostly all-metallic, two-part solutions, however, have significant disadvantages: Combining multiple components increases weight and production costs, as additional process steps are required to join the components. Steel-based solutions also require elaborate corrosion protection measures. Aluminum housings, in particular, require additional fire protection elements, which further increases material usage. Fiber-reinforced plastic (FRP) alternatives, due to their reduced stiffness compared to components made of, for example, steel, require increased component thickness and thus additional overall height.

[0012] Although multi-layered battery housing designs made of plastic-metal composite materials are known from the state of the art, which offer certain protective properties, these concepts do not have the mechanical rigidity that would be required for robust underride protection.

[0013] EP 2 742 549 Bl describes a battery housing component for traction batteries of electric vehicles. 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. The flat element serves to shield the area surrounding the battery housing component and / or the traction battery. (Page 3 / 36)

[0014] P81110DE electromagnetic radiation. It can consist of a metal foil, nonwoven fabric, woven fabric or conductive / polymeric foam material, or be present as a layer applied to the receiving body by means of sputtering, painting, vapor deposition or electroplating. However, a stabilizing underbody component is still necessary.

[0015] DE 10 2020 111 062 Al also describes such a battery housing component with a base body and a shielding element.

[0016] The battery housing components known from the prior art are multi-part and therefore require more complex assembly. Furthermore, these components are quite heavy. In addition, a multi-part design requires more installation space, particularly in the vertical direction. Moreover, due to the higher number of parts and the greater number of manufacturing steps, a multi-part design is also more expensive.

[0017] The invention is based on the objective of providing a battery housing component that enables a reduced overall weight, a smaller installation space requirement, especially in the vertical direction, as well as lower manufacturing costs.

[0018] The problem underlying the invention is solved by a battery housing component having the features of claim 1 of the present invention. Advantageous embodiments are described in the dependent claims.

[0019] More precisely, the problem underlying the invention is solved by a battery housing component comprising a receiving area for receiving at least one battery component and a surrounding area (page 4 / 36)

[0020] P81110DE

[0021] Connection area for connecting to another battery housing component. The battery housing component comprises a housing structure component, which defines the outer boundaries of the battery housing component; an EMC protection component, which defines a receiving space for the battery housing component; and a stabilizing component, which is sandwiched between the housing structure component and the EMC protection component. Within the receiving space of the battery housing component, the stabilizing component is connected to the housing structure component and the EMC protection component. Within the connection area of ​​the battery housing component, the EMC protection component is connected to the housing structure component without the stabilizing component being an intervening layer.

[0022] By sandwiching the stabilizing component between the housing structure component and the EMC protection component within the battery housing component, structural protection of the battery components is created in the vertical direction, particularly towards the road surface. This results in a battery housing component that does not require additional underbody protection, thus saving weight and installation space.

[0023] Another advantage of the battery housing component according to the invention is that fewer manufacturing steps are required for its production, which reduces manufacturing costs.

[0024] In other words, this provides an integrated battery housing component that combines the functionality of a battery housing component with that of underbody protection.

[0025] The battery housing component is preferably shell-shaped, with part of the receiving area forming a base of page 5 / 36

[0026] P81110DE

[0027] The shell is formed and the connecting area is connected to the ground by means of side walls, which are also part of the receiving area.

[0028] A shell-shaped form can be one characterized by a curved, especially concave, structure with an open interior that can accommodate and stabilize loads or contents.

[0029] The battery housing component is part of a battery housing designed to accommodate at least one battery component. The battery components are preferably designed as battery cells. Furthermore, it is also possible for the battery components to be designed as battery modules.

[0030] Preferably, the battery housing component is designed for a traction battery of an electrically powered motor vehicle. Preferably, the battery housing component is mountable on the body of a motor vehicle.

[0031] The battery housing component has a circumferential connection area, preferably designed as a connecting flange. "Circular" here means that the connection area is located in a region of the battery housing component that defines the contact area of ​​the battery housing component for another battery housing component. "Circular" here means that the connection area surrounds a receiving space formed by the battery housing in its assembled state. The connection area can be configured to allow a connection with another battery housing component, particularly a detachable one. The connection area can be a part of the battery housing component that does not form a boundary surface of the receiving space of the battery housing. Page 6 / 36

[0032] P81110DE

[0033] The connection area can also be referred to as the flange area.

[0034] The housing structure component forms an outer component or outer layer of the battery housing component. Consequently, the housing structure component defines the three-dimensional outer contour of the battery housing component or a part of the outer three-dimensional contour of a battery housing comprising the battery housing component. In particular, the housing structure component can at least partially define the outer structure of a battery housing formed from the battery housing component.

[0035] The housing structure component may comprise a plastic. Preferably, the plastic is polyamide or polypropylene. Preferably, the housing structure component consists of a fiber-reinforced plastic, in which case the plastic may be referred to as the matrix material and the fibers as the fiber material. Preferably, the housing structure component may have a plastic content between 40 wt.% and 80 wt.%. Alternatively or additionally, the housing structure component may have a fiber content of 20 wt.% to 60 wt.%. The fiber material preferably comprises glass fibers and / or carbon fibers and / or aramid fibers. The fiber material preferably comprises long fibers and / or short fibers and / or continuous fibers.

[0036] If the housing structure component is made of a plastic, and in particular a fiber-reinforced plastic, as described above, advantages arise with regard to the weight of the battery housing component. Furthermore, the housing structure component can be manufactured more easily in this way than a metal housing structure component, resulting in advantages with regard to the manufacturing costs of the battery housing component. Page 7 / 36

[0037] P81110DE

[0038] Preferably, the continuous fibers are arranged in various layer configurations at an angle to each other, particularly at angles of 0°, 45°, and 90°. This results in a particularly rigid structure, which offers advantages in terms of the required installation space, weight, and manufacturing costs of the battery housing component.

[0039] Preferably, the housing structure component has a wall thickness in the range of 1 mm to 12 mm, more preferably between 2 mm and 10 mm.

[0040] This results in advantages regarding the required installation space and the manufacturing costs of the battery housing component.

[0041] The housing structure component serves to protect the battery components housed within the battery housing component from stone chips and moisture. Therefore, it is preferable that the housing structure component meets the requirements of ISO 20567-1:2005 and / or DIN EN ISO 6270-2:2018 and / or DIN 55696:2016-10 and / or SAE J400.

[0042] EMC is an abbreviation for "Electromagnetic Compatibility". The EMC protection component preferably has or is designed as an electromagnetically insulating layer, which is preferably a metal foil and / or a metal braid, and / or an electrically conductive polymer layer. The metal is preferably aluminum and / or steel. Furthermore, the EMC protection component is preferably made of aluminum and / or steel.

[0043] An electromagnetic insulating layer is a component that prevents the propagation of electromagnetic fields. Page 8 / 36

[0044] P81110DE or greatly reduced. In particular, an electromagnetic insulating layer serves for electromagnetic shielding.

[0045] If the EMC protection component limits a receiving space of the battery housing component, this may mean that the EMC protection component forms at least part of the enclosure of the receiving space.

[0046] The EMC shielding component can have a thickness of 30 to 500pm, preferably a thickness of 100-200pm.

[0047] The stabilizing component serves to reinforce, in particular to stiffen, the battery housing component. It also serves to absorb energy in a vertical direction.

[0048] The stabilizing component comprises a metal, in particular steel and / or aluminum. Preferably, the stabilizing component consists of steel and / or aluminum.

[0049] The stabilizing component can have a thickness of 0.5 mm to 3 mm, preferably from 0.65 mm to 2 mm.

[0050] If the stabilizing component is arranged in a sandwich-like manner between the housing structure component and the EMC shielding component, this can mean that the housing structure component and the EMC shielding component extend over a surface area above and below the stabilizing component, respectively, with the housing structure component and the EMC shielding component being located on opposite sides of the stabilizing component. In particular, a sandwich-like arrangement can also include further layers located between the housing structure component and the EMC shielding component.

[0051] The battery housing component may have a grounding device which can be electrically connected to the battery components (page 9 / 36).

[0052] P81110DE is a connection device that penetrates a housing wall of the battery housing component.

[0053] This allows for the creation of a particularly reliable battery housing component.

[0054] According to an advantageous design, the stabilizing component is designed as a flat component.

[0055] This means that the stabilizing component occupies very little space in the vertical direction, while still being able to protect the entire recording area, especially from rockfall and other impact events.

[0056] A planar component is, in this context, a component with a large extent in length and width relative to its thickness.

[0057] Preferably, the stabilizing component is arranged in the battery housing component such that, in a state in which the battery housing component is part of a battery housing mounted in a motor vehicle during normal vehicle operation, it is located below the battery components.

[0058] According to an advantageous embodiment, the stabilization component extends exclusively within the recording area.

[0059] This ensures that only those areas of the battery housing component exposed to increased stress from weight and / or impact events are reinforced and protected by the stabilizing component. This offers advantages in terms of the weight and manufacturing costs of the battery housing component. Page 10 / 36

[0060] P81110DE

[0061] In particular, it may be provided that the stabilization component extends exclusively in a ground area of ​​the recording area.

[0062] According to an advantageous embodiment, a first adhesive layer is arranged between the housing structure component and the stabilizing component. According to this advantageous embodiment, or alternatively, a second adhesive layer is arranged between the stabilizing component and the EMC protection component.

[0063] This allows for a particularly simple and space-saving connection between the housing structure component and the stabilization component and / or between the stabilization component and the EMC protection component. This offers advantages in terms of weight, required installation space, and manufacturing costs of the battery housing component.

[0064] If the EMC protection component contains a metal, the additional advantage of a second adhesion layer described above can be to form a corrosion barrier between the EMC protection component and the stabilization component.

[0065] In particular, it can be designed so that the first adhesion layer does not extend into the flange area. This also has advantages with regard to the manufacturing costs of the battery housing component.

[0066] In particular, the second adhesion layer can extend into the flange area. This achieves a particularly efficient connection and reliable shielding between the EMC protection component and the stabilization component. Page 11 / 36

[0067] P81110DE

[0068] The first adhesion layer and / or the second adhesion layer can each have a thickness in the range of 30 pm to 200 pm.

[0069] The first adhesion layer and / or the second adhesion layer may contain polypropylene grafted maleic anhydride, also abbreviated as PP-g-MAH, and / or polyethylene grafted maleic anhydride, also abbreviated as PE-g-MAH, and / or polyacrylic acid.

[0070] The second adhesion layer can have the same projected area with respect to the EMC protection component.

[0071] This allows for a particularly secure connection between the stabilization component and the EMC protection component.

[0072] According to an advantageous embodiment, an outer edge of the housing structure component extends further from the receiving area in the connection area of ​​the battery housing component than an edge of the EMC protection component.

[0073] This ensures that the EMC shielding component does not cover the entire connection area, and in particular, that an area in the outer part of the connection area remains uncovered by the EMC shielding component. With a suitably designed battery housing component, the EMC shielding component is better protected against corrosion.

[0074] Preferably, the edge of the EMC shielding component is located between 20 mm and 40 mm from the outer edge of the housing structure component. Page 12 / 36

[0075] P81110DE

[0076] According to an advantageous embodiment, the housing structure component has at least one reinforcing rib. Preferably, the at least one reinforcing rib is arranged on an outer surface of the housing structure component.

[0077] In this way, the wall thickness of the housing structure component can be reduced, leading to a reduction in the component weight, manufacturing costs and the required installation space of the battery housing component.

[0078] An outer surface of the housing structure component is that part of the surface of the housing structure component which forms the outer surface of a battery housing consisting at least partially of the battery housing component.

[0079] A reinforcing rib can be an elongated, raised structure within or on the surface of a component, serving to increase stiffness and stability by improving load distribution and resistance to deformation.

[0080] Preferably, the at least one reinforcing rib is located on the outside of the housing structure component opposite the connection area of ​​the battery housing component, in particular opposite a transition area between the receiving area and the connection area.

[0081] Preferably, the battery housing component has a plurality of reinforcing ribs.

[0082] Preferably, the reinforcing ribs are made of the same material as the housing structure component. Preferably, at least one rib is monolithically connected to the rest of the housing structure component. Page 13 / 36

[0083] P81110DE

[0084] According to an advantageous embodiment, the battery housing component has a protective layer, wherein the protective layer is arranged sandwich-like between the stabilizing component and the EMC protection component, and wherein the protective layer is connected to the stabilizing component in the receiving area of ​​the battery housing component.

[0085] This achieves a particularly reliable separation between the stabilizing component and the EMC protection component, which also provides reliable corrosion protection in the event of material defects in the second adhesion layer. This allows the second adhesion layer to be made thinner, which can offer advantages in terms of the required installation space and manufacturing costs of the battery housing component.

[0086] The protective layer can preferably consist of a fiber-reinforced plastic. Furthermore, the fiber-reinforced plastic preferably comprises continuous fibers, in particular consolidated unidirectional fiber-reinforced thermoplastic tapes. This allows for a particularly thin and lightweight battery housing component.

[0087] The protective layer preferably has a thickness of 0.2 mm to 2 mm.

[0088] Preferably, the protective layer has the same matrix material as the housing structure component.

[0089] Preferably, the continuous fibers are arranged in various layer configurations at an angle to each other, particularly at angles of 0°, 45°, and 90°. This results in a particularly rigid structure, which offers advantages in terms of the required installation space, weight, and manufacturing costs of the battery housing component. Page 14 / 36

[0090] P81110DE

[0091] According to an advantageous embodiment, the protective layer extends outside the stabilizing component into the connection area.

[0092] This can result in a particularly effective protective effect and, in addition, improved stiffening, especially of the connection area of ​​the battery housing component.

[0093] If the protective layer extends beyond the stabilizing component, this can mean that the protective layer extends both within and outside the stabilizing component. In other words, the protective layer then extends into the receiving area and the connection area of ​​the battery housing component.

[0094] Preferably, the protective layer can extend further towards the outer edge of the connection area of ​​the battery housing component than the EMC protection component.

[0095] According to an advantageous embodiment, the battery housing component has a reinforcing layer which is arranged in the connection area between the housing structure component and the EMC protection component.

[0096] This allows for a particularly good reinforcement of the connection area of ​​the battery housing component.

[0097] The reinforcement layer can preferably consist of a fiber-reinforced plastic. More preferably, the fiber-reinforced plastic comprises continuous fibers, in particular consolidated unidirectional fiber-reinforced thermoplastic tapes. This allows for a particularly thin and lightweight battery housing component. Page 15 / 36

[0098] P81110DE

[0099] The reinforcing layer preferably has a thickness of 0.2 mm to 2 mm.

[0100] Preferably, the reinforcement layer has the same matrix material as the housing structure component.

[0101] Preferably, the continuous fibers are arranged in different layer configurations at an angle to each other, particularly at angles of 0°, 45° and 90°. This results in a particularly stiff structure.

[0102] Preferably, the reinforcement layer is aligned along a longitudinal orientation of the connection area.

[0103] According to an advantageous embodiment, a third adhesion layer is arranged between the housing structure components ( 10 ) and the protective layer and / or the reinforcing layer.

[0104] In particular, it may be provided that the third adhesion layer extends into the connection area.

[0105] The third adhesion layer can have a thickness ranging from 30 pm to 200 pm.

[0106] The third adhesion layer may consist of polypropylene grafted maleic anhydride, also abbreviated as PP-g-MAH, and / or polyethylene grafted maleic anhydride, also abbreviated as PE-g-MAH, and / or polyacrylic acid.

[0107] If the battery housing component has a third adhesive layer, the second adhesive layer is located between the EMC protection component and the protective layer. Page 16 / 36

[0108] P81110DE

[0109] Preferably, if the battery housing component has a reinforcing layer, it has a fourth adhesive layer for connecting the reinforcing layer to the EMC protection component. This fourth adhesive layer is located between the reinforcing layer and a portion of the EMC protection component. In this case, the second adhesive layer is located in the connection area of ​​the battery housing component between the EMC protection component and the reinforcing layer.

[0110] According to an advantageous embodiment, the housing structure component comprises a fiber-reinforced plastic, preferably with a plastic matrix of polyamide or polypropylene and a fiber mass fraction between 20% and 60%, and / or the stabilizing component comprises a metal, preferably steel, and / or the EMC protection component comprises aluminum and / or iron and / or steel and is preferably an aluminum foil.

[0111] The present invention also aims to provide a method for manufacturing a battery housing component which enables a particularly cost-effective manufacturing of a battery housing component with a small installation space requirement in the vertical direction and a low component weight.

[0112] The problem underlying the present invention is solved by a method for manufacturing a battery housing component described above, wherein the method comprises the following process steps:

[0113] Applying a first adhesive layer to the stabilizing component and a second adhesive layer to the EMC protection component, page 17 / 36

[0114] P81110DE

[0115] Heating the housing structure component and the stabilizing component coated with the first adhesion layer to a melting temperature of a matrix material of the housing structure component,

[0116] Inserting the EMC protection component coated with the second adhesive layer into a mold, preferably a flow mold, such that the second adhesive layer points away from the mold.

[0117] Heating, preferably by means of infrared radiation, the EMC protection component located in the mold and the second adhesion layer ,

[0118] Inserting the stabilizing component coated with the first adhesive layer into the mold and preferably onto the second adhesive layer such that the first adhesive layer points away from the mold; inserting the housing structure component into the mold and onto the first adhesive layer.

[0119] Connecting and forming, preferably by means of extrusion, the EMC protection component, the second adhesion layer, the stabilization component, the first adhesion layer and the housing structure component to form the battery housing component.

[0120] This method allows for the production of a battery housing component that integrates the functionality of underbody protection. Consequently, significantly fewer manufacturing steps are required compared to producing a battery housing component and underbody protection separately. This reduces the manufacturing costs for the battery housing component.

[0121] If the EMC protection component coated with the second adhesive layer is inserted into the mold in such a way that the second adhesive layer points away from the mold, this can mean that the EMC protection component is located between page 18 / 36

[0122] P81110DE is arranged between the forming surface of the mold and the second adhesion layer. Similarly, introducing the stabilizing component coated with the first adhesion layer into the mold such that the first adhesion layer points away from the mold can mean that the stabilizing component is arranged between the forming surface of the mold and the first adhesion layer.

[0123] Preferably, the housing structure component, the stabilizing component and the EMC protection component are introduced into the forming tool in such a way that, after the components have been formed into a finished battery housing component, the stabilizing component is located in the receiving area of ​​the battery housing component and is arranged sandwich-like between the housing structure component and the EMC protection component.

[0124] If the EMC protection component, the second adhesion layer, the stabilization component, the first adhesion layer, and the housing structure component are formed and joined to form the battery housing component, this can mean that, by means of the forming tool, which is in particular part of a forming press, the EMC protection component, the second adhesion layer, the stabilization component, the first adhesion layer, and the housing structure component are deformed in such a way that, in their sum, they have the shape of the battery housing component, and a materially bonded connection exists between the components by means of the first adhesion layer and the second adhesion layer.

[0125] According to an advantageous implementation form, the process includes the following additional process steps:

[0126] Applying a third adhesive layer to the protective layer and / or the reinforcing layer, page 19 / 36

[0127] P81110DE

[0128] Heating the protective layer and / or the reinforcing layer and the third adhesion layer to the melting temperature of a matrix material of the

[0129] Housing structure component, introduction of the protective layer coated with the third adhesive layer and / or the reinforcing layer coated with the third adhesive layer into the mold and onto the second adhesive layer in such a way that the third adhesive layer points away from the mold.

[0130] In this way, the battery housing can integrate even more functionalities within a single manufacturing process, thereby reducing manufacturing costs in relation to the functionality produced.

[0131] The present invention also aims to provide a battery housing that is particularly inexpensive to manufacture and has a low vertical space requirement and a low component weight.

[0132] The problem underlying the present invention is solved by a battery housing comprising at least one battery housing component as described above. The battery housing has a receiving space for receiving at least one battery component.

[0133] This allows for the provision of a particularly inexpensive, lightweight and compact traction battery housing.

[0134] Preferably, the battery housing has at least one second battery housing component. Page 20 / 36

[0135] P81110DE

[0136] The second battery housing component is preferably also a previously described battery housing component according to the invention.

[0137] Preferably, the battery housing is designed for a traction battery of an electrically powered motor vehicle. Preferably, the battery housing is mountable on the body of a motor vehicle.

[0138] The present invention also aims to provide a traction battery which is particularly inexpensive to manufacture and has a small vertical extent and a low weight.

[0139] This problem underlying the present invention is solved by a traction battery comprising a battery housing as described above and at least one battery component arranged in the receiving space of the battery housing.

[0140] This allows for the provision of a particularly inexpensive, compact and lightweight traction battery.

[0141] The present invention also aims to provide a motor vehicle, preferably an electric motor vehicle, which is particularly inexpensive to manufacture, has a low weight, a particularly long range and a large interior volume.

[0142] This problem underlying the present invention is solved by a motor vehicle, preferably an electric motor vehicle, comprising a traction battery as described above.

[0143] This allows for the use of a particularly space-saving, inexpensive and lightweight traction battery, making it larger. Page 21 / 36

[0144] The P81110DE can be designed, which has advantages in terms of the range, weight and manufacturing costs of the motor vehicle.

[0145] Further advantages, details and features of the invention will become apparent from the exemplary embodiments described below.

[0146] Specifically, they show:

[0147] Figure 1: A cross-section of a schematically represented

[0148] Battery housing component according to a first embodiment;

[0149] Figure 2: A cross-section of a schematically represented

[0150] Battery housing component according to a second embodiment;

[0151] Figure 3: A cross-section of a schematically represented

[0152] Battery housing component according to a third embodiment;

[0153] Figure 4: A cross-section of a schematically represented

[0154] Battery housing component according to a fourth embodiment;

[0155] Figure 5: A top view of a battery housing component according to the first embodiment, wherein a second adhesion layer and an EMC protection component are not shown for illustrative purposes;

[0156] Figure 6: A battery housing according to the invention; and page 22 / 36

[0157] P81110DE

[0158] Figure 7a-e: Process steps of a process according to the invention for manufacturing a battery housing component according to the invention.

[0159] 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.

[0160] Figure 1 shows a first embodiment of a battery housing component 1 according to the invention in cross-section.

[0161] The battery housing component 1 is multi-layered and comprises a housing structure component 10, a stabilization component 30, and an EMC protection component 20. The stabilization component 30 is located between the

[0162] Housing structure component 10 and the EMC protection component 20 are arranged in a sandwich-like manner.

[0163] The battery housing component 1 is trough-shaped and has a receiving area 2 designed to receive several battery components 3. The receiving area 2 has a flat bottom and a surrounding wall that projects from the bottom.

[0164] A circumferential connecting area 4 adjoins the receiving area 2, in particular the wall of the receiving area 2. The connecting area 4 has a circumferential outer edge 6 at its outer end, which thus also forms an outer edge of the battery housing component 1. The connecting area 4 is designed such that the battery housing component (page 23 / 36)

[0165] P81110DE

[0166] 1 is set up for connection with another battery housing component.

[0167] The housing structure component 10 serves to define the three-dimensional structure of the outer surface of the battery housing component 1 and to protect it from external mechanical impact. For this purpose, the housing structure component 1 can be made of a fiber-reinforced plastic. The housing structure component 10 has a wall thickness of 2 mm to 5 mm, with the wall thickness at some points reaching up to 10 mm.

[0168] Like the battery housing component 1, the housing structure component 10 is designed in a trough-shaped or shell-like form. It thus forms the contour of the receiving area 2 without, however, providing its inner surface. Rather, the housing structure component 10 therefore has a concave area.

[0169] The housing structure component 10 also has a large number of reinforcing ribs 11. The reinforcing ribs 11 are located on an outer surface 12 of the housing structure component 10.

[0170] The stabilizing component 30 is arranged in the concave area of ​​the housing structure component 10. This can consist of a flat steel sheet with a thickness of 0.5 mm to 3 mm and serves to further stabilize and stiffen the battery housing component 1 and to absorb impact energy in the event of an impact.

[0171] The stabilizing component 30 is sandwiched between the housing structure component 10 on one side and the EMC protection component 20 on the other within the receiving area 2 of the battery housing component 1. The EMC protection component 20 extends across side 24 / 36 in receiving area 2.

[0172] P81110DE

[0173] Stabilizing component 30 and in the connection area 4 above the housing structure component 10. The EMC protection component 20 forms the inner surface of the battery housing component 1. The EMC protection component 20 can consist of an aluminum foil with a thickness between 30 pm and 500 pm. At its outer edge, the EMC protection component 20 has a rim 21.

[0174] A first adhesion layer 40 is arranged between the housing structure component 10 and the stabilizing component 30. This layer serves to provide a material-bonded connection between the housing structure component 10 and the stabilizing component 30. The first adhesion layer 40 comprises polypropylene-grafted maleic anhydride, and / or polyethylene-grafted maleic anhydride, and / or polyacrylic acid.

[0175] A second adhesive layer 50 is arranged on the EMC protection component 20. This layer serves to provide a material-bonded connection between the EMC protection component 20 on one side and the housing structure component 10 and the stabilizing component 30 on the other side. The second adhesive layer 50 comprises polypropylene and / or maleic anhydride and / or polyacrylic acid.

[0176] Figure 2 shows a second embodiment of a battery housing component 1 according to the invention in cross-section.

[0177] The battery housing component 1 shown in Figure 2 is similar in many aspects to the battery housing component 1 shown in Figure 1, except that in the second embodiment of the battery housing component 1, an additional protective layer 60 is arranged above the stabilizing component 30, sandwiched between the stabilizing component 30 and the EMC protection component 20. The protective layer 60 extends only within the receiving area 2 of the battery housing component 1. (See page 25 / 36.)

[0178] P81110DE

[0179] Stabilizing component 30 has a third adhesion layer 80. The second adhesion layer 50 is located here in the receiving area 2 between the EMC protection component 20 and the protective layer 60.

[0180] Figure 3 shows a third embodiment of a battery housing component 1 according to the invention in cross-section.

[0181] The battery housing component 1 shown in Figure 3 is similar in many aspects to the battery housing component 1 shown in Figure 2, except that the battery housing component 1 according to the third embodiment does not have reinforcing ribs 11, although these can be provided as in the battery housing component 1 according to the second embodiment. The protective layer 60 extends into the connection area 4 of the battery housing component 1 and over the same area as the EMC protection component 20. The third adhesion layer 80 also extends into the connection area 4.

[0182] Figure 4 shows a fourth embodiment of a battery housing component 1 according to the invention in cross-section.

[0183] The battery housing component 1 shown in Figure 4 is similar in many aspects to the battery housing component 1 shown in Figure 2, except that the battery housing component 1 according to the fourth embodiment does not have reinforcing ribs 11, which can be provided as in the battery housing component 1 according to the second embodiment. In addition to the protective layer 60, which is arranged in the receiving area 2, the battery housing component 1 has a reinforcing layer 70, which is arranged in the receiving area 4. The reinforcing layer 70 is located in the connection area 4 between the housing structure component 10 and the EMC (page 26 / 36).

[0184] P81110DE

[0185] Protective component 20, wherein the second adhesion layer 50 and a fourth adhesion layer 80 are located on the upper and lower sides of the reinforcement layer 70, respectively. The reinforcement layer 70 can be made of a fiber-reinforced plastic. The fourth adhesion layer 80 can be essentially identical to the first and second adhesion layers 40 and 50.

[0186] The reinforcement layer 70 serves to locally reinforce the connection area 4.

[0187] Figure 5 shows a top view of a battery housing component 1 according to the invention, wherein the EMC protection component 20 and the second adhesion layer 50 are not shown for reasons of better clarity.

[0188] It can be seen that the connection area 4 is formed around the receiving area 2, and that the connection area 4 is bounded by an outer edge 6. The stabilizing component 30 is arranged in the receiving area 2.

[0189] Figure 6 shows a battery housing 7 according to the invention. It has a first battery component 1 according to the invention, which is implemented here in the third embodiment shown in Figure 3. Of course, the battery housing 7 could also be fitted with the battery housing component 1 according to the first, second, or fourth embodiment. In addition, the battery housing 7 has a housing cover that closes the receiving area 2 of the first battery housing component 1 at the top. In this way, a receiving space 5 is created in which several battery components 3 are arranged.

[0190] Figures 7a to 7e illustrate a method according to the invention for manufacturing a battery housing component according to the invention. Page 27 / 36

[0191] P81110DE

[0192] In step 100, the first adhesion layer 40 is applied to the stabilizing component 30 and the second adhesion layer 50 is applied to the EMC protection component 20.

[0193] In step 101, the housing structure component 10 and the stabilizing component 30 with the applied, first adhesion layer 40 are heated to a temperature that corresponds to the melting temperature of a matrix material of the housing structure component 10.

[0194] In step 102, the EMC shielding component 20 with the applied second adhesive layer 50 is placed into a mold 90 of an extrusion press. The EMC shielding component 20 is placed into the mold 90 in such a way that the second adhesive layer 50 points away from the mold 90.

[0195] In step 103, the EMC protection component 20 with the applied second adhesion layer 50 is heated by means of infrared radiation.

[0196] In step 107, the stabilizing component 30, with the applied first adhesion layer 40, is introduced into the mold 90. The stabilizing component 30 is introduced into the mold 90 in such a way that it rests on the second adhesion layer 50 and the first adhesion layer 40 points away from the mold 90.

[0197] In step 108, the housing structure component 10 is introduced into the mold 90, whereby the housing structure component 10 comes into contact with the first adhesion layer 40.

[0198] In step 109, the housing structure component 10, the stabilizing component 30, the EMC protection component 20, and the first and second adhesion layers 40, 50 are formed using the forming tool 90 and a second extrusion press also belonging to the extrusion press. Page 28 / 36

[0199] P81110DE

[0200] The forming tool, which in particular represents the counterpart belonging to the forming tool 90, is connected and formed to the battery housing component 1.

[0201] The method according to the invention described above can also be extended by steps 104, 105 and 106, which in particular serve to produce one of the three embodiments shown in Figures 2-4.

[0202] Steps 104 to 106 take place after step 103 and before step 109.

[0203] In step 104, a third adhesion layer 80 is applied to the protective layer 60 and / or the reinforcing layer 70.

[0204] In step 105, the protective layer 60 and / or the reinforcement layer 70 as well as the third adhesion layer 80 are heated to the melting temperature of a matrix material of the housing structure component 10.

[0205] In step 106, the protective layer 60 coated with the third adhesive layer 80 and / or the reinforcing layer 70 coated with the third adhesive layer 80 are placed into the mold 90. The protective layer 60 and / or the reinforcing layer 70 come into contact with the second adhesive layer 50, and the third adhesive layer 80 points away from the mold 90.

[0206] It is understood that in this case, step 109 is supplemented by the protective layer 60 coated with the third adhesion layer 80 and / or the reinforcing layer 70 coated with the third adhesion layer 80. Page 29 / 36

[0207] P81110DE

[0208] In this way, one of the battery housing components shown in Figures 1-5 can be manufactured.

[0209] Page 30 / 36

[0210] P81110DE

[0211] Reference symbol list

[0212] 1 Battery housing component

[0213] 2 Recording area

[0214] 3 Battery component

[0215] 4 Connection area

[0216] 5 Recording room

[0217] 6 Outer edge (of the connection area)

[0218] 7 Battery housings

[0219] 10 Housing structure component

[0220] 11 Reinforcing rib

[0221] 12 Outer surface (of the housing structure component)

[0222] 20 EMC protection components

[0223] 21 Rand (the EMC protection component)

[0224] 30 Stabilization component

[0225] 40 First adhesion layer

[0226] 50 Second adhesion layer

[0227] 60 protective layer

[0228] 70 Reinforcement layer

[0229] 80 Third adhesion layer

[0230] 90 Forming tool

Claims

Page 31 / 36 Applicant: KAUTEX TEXTRON GmbH & Co. KG Our reference number: P81110DE Patent claims 1. Battery housing component (1) comprising a receiving area (2) for receiving at least one battery component (3) and a connection area (4) surrounding the receiving area (2) at its edges for connecting to another battery housing component, wherein the battery housing component (1) comprises a housing structure component (10) which defines the battery housing component (1) externally, an EMC protection component (20) which defines a receiving space (5) of the battery housing component (1), and a stabilizing component (30) which is sandwiched between the housing structure component (10) and the EMC protection component (20), wherein in the receiving area (2) of the battery housing component (1) the stabilizing component (30) is connected to the housing structure component (10) and the EMC protection component (20),and wherein in the connection area (4) of the battery housing component (1) the EMC protection component (20) is connected to the housing structure component (10) without an intermediate layer of the stabilizing component (30).

2. Battery housing component (1) according to one of the preceding claims, characterized in that the stabilizing component (30) is designed as a planar component. Page 32 / 36 P81110DE 3. Battery housing component (1) according to one of the preceding claims, characterized in that the stabilizing component (30) extends exclusively in the receiving area (2).

4. Battery housing component (1) according to one of the preceding claims, characterized in that a first adhesion layer (40) is arranged between the housing structure component (10) and the stabilizing component (30), and / or that a second adhesion layer (50) is arranged between the stabilizing component (30) and the EMC protection component (20).

5. Battery housing component (1) according to one of the preceding claims, characterized in that an outer edge (6) of the housing structure component (10) in the connection area (4) of the battery housing component (1) extends further from the receiving area (2) than an edge (21) of the EMC protection component (20) .

6. Battery housing component (1) according to one of the preceding claims, characterized in that the housing structure component (10) has at least one reinforcing rib (11), wherein the at least one reinforcing rib (11) is preferably arranged on an outside of the housing structure component (10).

7. Battery housing component (1) according to one of the preceding Claims, characterized by the following features: the battery housing component (1) has a protective layer (60); the protective layer (60) is sandwiched between the stabilization component (30) and the EMC protection component (20) are arranged; Page 33 / 36 P81110DE the protective layer (60) is connected to the stabilizing component (30) in the receiving area (2) of the battery housing component (1).

8. Battery housing component (1) according to claim 7, characterized in that the protective layer (60) extends outside the stabilizing component (30) into the connection area (4).

9. Battery housing component (1) according to claim 7, characterized in that the battery housing component (1) has a reinforcing layer (70) which is arranged in the connection area (4) between the housing structure component (10) and the EMC protection component (20).

10. Battery housing component (1) according to one of claims 7 to 9, characterized in that a third adhesion layer (80) is arranged between the housing structure component (10) and the protective layer (60) and / or the reinforcing layer (70).

11. Battery housing component (1) according to one of the preceding claims, characterized in that the housing structure component (10) comprises a fiber-reinforced plastic, preferably with a plastic matrix of polyamide or polypropylene and a fiber mass fraction between 20% and 60%, and / or that the stabilizing component (30) comprises a metal, preferably steel, and / or that the EMC protection component (20) comprises aluminium and / or iron and / or steel and is preferably an aluminium foil. Page 34 / 36 P81110DE 12. Method for manufacturing a battery housing component (1) according to any one of claims 1 to 11, wherein the method comprises the following process steps: Step 100: Applying a first adhesion layer (40) to the stabilizing component (30) and a second adhesion layer (50) to the EMC protection component (20); Step 101: Heating the housing structure component (10) and the stabilizing component (30) coated with the first adhesion layer (40) to a melting temperature of a matrix material of the housing structure component (10); Step 102: Inserting the EMC protection component (20) coated with the second adhesive layer (50) into a molding tool (90), preferably a compression molding tool (90), such that the second adhesive layer (50) points away from the molding tool (90); Step 103: Heating, preferably by means of infrared radiation, the EMC protection component (20) located in the mold (90) and the second adhesion layer (50); Step 107: Introducing the stabilizing component (30) coated with the first adhesion layer (40) into the mold (90) and preferably onto the second adhesion layer (50) such that the first adhesion layer (40) points away from the mold (90); Step 108: Inserting the housing structure component (10) into the mold (90) and onto the first adhesion layer (40) ; Step 109: Joining and forming, preferably by extrusion, the EMC protection component (20), the second adhesion layer (50), the stabilization component (30), the first adhesion layer (40) and the Page 35 / 36 P81110DE Housing structure component (10) to battery housing component (1).

13. Method according to claim 12, characterized in that the method comprises the additional process steps: Step 104: Applying a third adhesive layer (80) to the protective layer (60) and / or the reinforcing layer (70); Step 105: Heating the protective layer (60) and / or the reinforcing layer (70) and the third adhesion layer (80) to the melting temperature of a matrix material of the housing structure component (10); Step 106: Introducing the protective layer (60) coated with the third adhesion layer (80) and / or the reinforcing layer (70) coated with the third adhesion layer (80) into the mold (90) and onto the second adhesion layer (50) such that the third adhesion layer (80) points away from the mold (90).

14. Battery housing (7) comprising at least one battery housing component (1) according to any one of claims 1 to 11, wherein the battery housing (7) has a receiving space (5) for receiving at least one battery component (3).

15. Traction battery comprising a battery housing (7) according to claim 14 and at least one battery component (3) arranged in the receiving space (5) of the battery housing (7).

16. Motor vehicle, preferably electric motor vehicle, comprising a traction battery according to claim 15.

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