Battery housing component for a battery housing of a traction battery, battery housing for a traction battery, traction battery, motor vehicle comprising a traction battery, method for manufacturing a battery housing component, and method for manufacturing a battery housing

Abstract

The present invention relates to a battery housing component (1) for a battery housing (2) of a traction battery (3), comprising a battery housing part (4) and at least one insert (5) which is mounted on an inner side (8) of the battery housing part (4), wherein the battery housing component (1) has the following features: - the battery housing part (4) comprises at least one first connecting region (9) made of metal, at which the at least one insert (5) is connected to the battery housing part (4), and - the at least one insert (5) comprises a first contact region (13) which is made of a thermoplastic material by means of which the at least one insert (5) is mounted on the at least one first connecting region (9), wherein - the at least one first connecting region (9) has, on its surface, a microstructure (10) with undercuts (11), and the first contact region (13) of the at least one insert (5) is interlockingly connected to the at least one first connecting region (9), and / or - the first contact region (13) of the at least one insert (5) is connected to the at least one first connecting region (9) by means of an adhesion-promoting layer (19).

Description

[0001] Page 1 of 76

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

[0003] Our reference number: P81106WO

[0004] December 19, 2024

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

[0006] The present invention relates to a battery housing component for a battery housing of a traction battery comprising a battery housing component and at least one installation part which is attached to an inner side of the battery housing component.

[0007] The present invention further relates to a battery housing for a traction battery, wherein the battery housing comprises two battery housing components, between which an interior space is formed for receiving a plurality of battery cells and / or at least one battery module with a plurality of battery cells, and at least one installation part which is attached to an inner side of the first battery housing component and / or the second battery housing component.

[0008] The present invention further relates to a traction battery for a motor vehicle, comprising a plurality of battery cells and / or at least one battery module with a plurality of battery cells and a battery housing as described above, wherein the plurality of battery cells and / or the at least one battery module with the plurality of battery cells is / are accommodated in the interior of the battery housing. Page 2 of 76

[0009] P81106WO

[0010] The present invention further relates to a motor vehicle, in particular an electric motor vehicle with a traction battery as described above, wherein the traction battery is arranged in particular below a passenger cell of the motor vehicle.

[0011] The present invention also relates to a method for manufacturing one of the above battery housing components.

[0012] The present invention further relates to a method for manufacturing the above battery housing, wherein the battery housing comprises two battery housing components, between which an interior space is formed for receiving a plurality of battery cells and / or at least one battery module with a plurality of battery cells, and at least one installation part which is attached to an inner side of the first battery housing component and / or the second battery housing component.

[0013] Battery housings for traction batteries in motor vehicles are currently often manufactured from battery housing components as deep-drawn metallic parts. The battery housing is usually formed from two battery housing components: a housing tray facing the road and a housing cover facing the passenger compartment of the motor vehicle.

[0014] An alternative is battery housings with battery housing components made of plastic, i.e. with a housing tray and a housing cover made of plastic, which are typically manufactured in a thermal forming process.

[0015] To form the traction battery, a large number of battery cells are inserted into and held within the battery casing. For example, a traction battery can contain approximately 600 to 8000 cylindrical cells, typically housed in the battery casing (page 3 / 76).

[0016] The P81106WO traction battery is protected and housed under the passenger compartment of the motor vehicle. It can therefore be mounted under the underbody of the motor vehicle or form the underbody itself.

[0017] To secure the battery cells, ensure structural stability, monitor operating parameters, and address various safety aspects, a number of components are integrated into the battery housing. These components can include, for example, battery cell holders to secure the cells within the housing, or structural components to ensure the housing's structural integrity. These components are often manufactured as molded plastic parts, as they are easy and cost-effective to produce. Polyurethane (PU) potting compounds are frequently used in their manufacture.

[0018] However, this results in various advantages and problems. Battery housings with deep-drawn metal parts are often inexpensive to manufacture. However, the installation of the components, especially with the typically used polyurethane (PU) potting compounds, involves a complex manufacturing process and inconsistent assembly quality. Therefore, battery housings with deep-drawn metal parts lag significantly behind plastic battery housings in terms of functional integration and especially cell integration. With plastic battery housings, plastic components, for example, with the typically used PU potting compounds, can be easily and seamlessly bonded to them. However, plastic battery housings are more expensive, so they are only used to a limited extent in practice. Page 4 / 76

[0019] P81106WO

[0020] In order to provide a cost- and function-optimized battery housing or a corresponding traction battery, it is therefore desirable to be able to utilize the advantages of battery housings with deep-drawn metal parts together with the advantages of the built-in parts made of thermoplastic plastic.

[0021] This is possible, for example, by using adhesive bonding techniques to attach components to deep-drawn metal parts, typically using liquid or paste-like adhesives. However, these bonding techniques are complex and difficult to implement on an industrial scale. This is particularly true when, for example, battery cell holders with pre-mounted battery cells are to be attached to or integrated into the battery housing to simplify and reduce the manufacturing time required for both the battery housings and the entire traction batteries. However, a battery cell holder with pre-mounted battery cells can hardly exceed a temperature of 40°C during the curing of a structural adhesive in the oven. This extends the required oven time to, for example, 30 minutes.With line cycle times of 60–120 seconds, this means that a single oven run must have up to 30 nests for the corresponding number of battery housing components. This applies to each of these battery housing components for a battery housing with a housing tray and a housing lid. To make matters worse, structural adhesives often only reach their final strength after several days, making the production of a battery housing component using such an adhesive method particularly complex.

[0022] The invention is based on the objective of providing a battery housing component for a battery housing of a traction battery, a battery housing for a traction battery, a traction battery with such a battery housing, a motor vehicle with a traction battery, a method for manufacturing a battery housing component, and a method for manufacturing a [page 5 / 76]

[0023] P81106WO

[0024] to provide a battery housing that represents an improvement over the prior art and overcomes at least some of the aforementioned disadvantages. Specifically, the invention is based on the objective of providing a battery housing component for a traction battery, a battery housing for a traction battery, a traction battery with such a battery housing, a motor vehicle with a traction battery, a method for manufacturing a battery housing component, and a method for manufacturing a battery housing that enable the simple and efficient manufacture of a battery housing component, a battery housing, and a traction battery.

[0025] The problem underlying the present invention is solved by a battery housing component having the features of claim 1. Advantageous embodiments of the battery housing component are described in the dependent claims.

[0026] More precisely, the problem underlying the present invention is solved by a battery housing component for a battery housing of a traction battery, comprising a battery housing component and at least one installation component attached to an inner surface of the battery housing component, wherein the battery housing component has the following features: the battery housing component has at least one first metal connection area at which the at least one installation component is connected to the first battery housing component, and the at least one installation component has a first contact area made of a thermoplastic material with which the at least one installation component is attached to the at least one first connection area, page 6 / 76

[0027] P81106WO the at least one first connection area has a microstructure with undercuts on its surface, and the first contact area of ​​the at least one component is positively connected to the at least one first connection area, and / or the first contact area of ​​the at least one component is connected to the at least one first connection area by means of an adhesion promoter layer.

[0028] The appropriately designed battery housing component can thus be manufactured and supplied using a hybrid technology, comprising at least one insert component that can be easily and freely shaped, for example, as a thermoplastic molded part, and a simple connection between this insert and the battery housing component. The battery housing component, with its first connection area made of metal, can be manufactured simply and cost-effectively and exhibits high stability. This allows the advantages of insert components manufactured using thermoplastic processes to be combined with cost-effectively manufactured battery housing components made of metal, or at least with dedicated metal connection areas.

[0029] According to the invention, the connection between the battery housing component and the at least one insert can be established in two different ways. On the one hand, a positive-locking connection can be established by the first contact area of ​​the at least one insert engaging the microstructure with the undercuts on the surface of the at least one first connection area. The positive-locking connection is established such that the microstructure with the undercuts is surrounded by a material from the first contact area of ​​the at least one insert when heated, and after cooling and solidifying, this microstructure is permanently surrounded. Such a connection (page 7 / 76)

[0030] P81106WO cannot be manufactured with the thermoplastic material of the first contact area of ​​the at least one component in the cold state, i.e., at normal ambient temperature. A positive fit can be achieved for individual undercuts by having the undercuts extend from their base on the corresponding first connecting part and, at least partially, have a greater width than at the base, so that each undercut can be individually held in a positive fit. An alternative embodiment of the undercuts, which enables a positive fit with the corresponding first contact area, consists of the undercuts extending from their base in different directions, thus enabling a positive fit with several undercuts simultaneously.

[0031] Alternatively or additionally, the first contact area of ​​the at least one component can be connected to the at least one first connection area by means of the adhesion promoter layer. Here, a material-bonded connection is created, which is also based on heating the thermoplastic material of the first contact area of ​​the at least one component, with the adhesion promoter layer also being heated.

[0032] The adhesion promoter can be applied, for example, as a film or powder. The adhesion promoter can be applied, for example, to the at least one first bonding area or to the first contact area of ​​the at least one component. Adhesion promoters are typically based on a thermoplastic, such as polypropylene or polyethylene, and are often grafted with maleic anhydrite to bond to metals. Adhesion promoters are typically thermally activated. Page 8 / 76

[0033] P81106WO

[0034] In both cases, the connection can be established by locally heating the at least one first connection area, so that only a small amount of energy is required to manufacture the battery housing component. Additionally, the heating is locally confined, which severely limits heat transfer to other components and largely prevents heat-related damage to other components. Thus, in both cases, a local connection between the at least one component and the battery housing component can be established without heating the battery housing component as a whole.

[0035] In this configuration, all first connection areas can have a microstructure with undercuts on their surface, and all components are positively connected to the first connection areas, or all first contact areas of the at least one component are connected to the corresponding first connection area by means of an adhesion promoter layer. However, mixed configurations are also possible, in which at least one first connection area has a microstructure with undercuts on its surface, and the at least one component is positively connected to the at least one first connection area, and the battery housing component comprises at least one first connection area in which the first contact area of ​​the at least one component is connected to the at least one first connection area by means of an adhesion promoter layer.

[0036] The battery housing component serves to form a battery housing for a traction battery for an electrically powered motor vehicle, as detailed below.

[0037] The battery housing component can be trough-shaped, also known as a half-trough, or designed in the form of a plate. The inner surface is defined by the placement of the [page 9 / 76].

[0038] P81106WO at least one built-in component as well as through the increasing number of battery cells.

[0039] The at least one component can be manufactured entirely as a thermoplastic molded part from a thermoplastic material. In principle, different materials can be used, even in combination. For example, crossplies can be used as materials for the first contact area of ​​the at least one component. Crossplies are fiber-reinforced plastics, such as glass fiber-reinforced polypropylene (GFPP), which preferably have a structure with multiple fiber layers embedded in a plastic material. The at least one component can also consist of a combination of different materials and, for example, have a layered structure, with the at least one first contact area being made of the thermoplastic material.Depending on their function, other areas of the at least one component may be made of other materials, such as metal or other plastics. The at least one component may also be made entirely or partially solid, for example, by being manufactured from solid plastic using an injection molding process. Alternatively, the at least one component may be designed as a hollow body with an internal structure featuring reinforcing ribs and / or honeycomb reinforcement, or at least have an area designed as a hollow body with an internal structure featuring reinforcing ribs and / or honeycomb reinforcement.

[0040] The at least one first metal connection area can only be located on the inside of the battery housing component in order to reliably establish the connection with the at least one component. This prevents direct thermal contact between the at least one first connection area and the component. Page 10 / 76

[0041] P81106WO at least one built-in component can be manufactured, whereby a particularly good heat transfer from the at least one first connection area to the first contact area of ​​the at least one built-in component can take place.

[0042] Each of the components can also have several first contact areas, which are arranged separately for connection to one or more first connection areas of the battery housing component. This allows at least one component to be attached to the several first connection areas, for example, in the manner of a bridge.

[0043] Conversely, it is possible that a first contact area extends over separately arranged first connection areas of the battery housing component and is thus connected to several first connection areas.

[0044] Additional details regarding the above-mentioned and described advantages and further design possibilities result from the following description of detailed examples.

[0045] Preferably, the battery housing component is designed such that the battery housing component is made of metal, in particular as a deep-drawn metal part or as a pressed metal component, and the at least one first connection area is part of the battery housing component, and / or the first battery housing component has a base body made of plastic, which is in particular made of thermoplastic molded parts, and has at least one metallic insert, wherein the metallic insert is connected to the base body, and the at least one first connection area is on page 11 / 76

[0046] P81106WO which has at least one metallic insert.

[0047] In one case, the battery housing component can be manufactured as a metal component in a manner known per se. Preferably, the battery housing component is manufactured from sheet steel or aluminum sheet in a manner known per se. Areas of the battery housing component can be designed as first connection areas for connection to the at least one insert. The first connection areas can be arranged arbitrarily, so that changes in the design of the battery housing component, including changes to the position of the at least one insert, can be made without changes to the manufacturing of the battery housing component itself. An adjustment can only be made to the provision of the at least one first connection area.In the other case, the base body can, for example, be made of a thermoplastic material in which the at least one metallic insert is at least partially embedded. A stable connection can be established between the base body and the at least one metallic insert. The at least one metallic insert can, for example, be made of sheet metal, with a steel or aluminum sheet being preferred. The at least one metallic insert can be partially, for example only on one side, or completely enclosed by material of the base body.

[0048] Preferably, the battery housing component is designed such that the at least one installation part comprises at least one battery cell holder, wherein in particular a plurality of battery cells can be attached to or are attached to the at least one battery cell holder, and / or page 12 / 76

[0049] P81106WO that at least one built-in component is designed as a battery module with at least one battery cell holder and a plurality of battery cells attached to the at least one battery cell holder, wherein the at least one first contact area is part of the at least one battery cell holder.

[0050] Battery cell holders are essential for mounting the battery cells, making reliable positioning and attachment of the holders crucial. To this end, the battery cell holders can have a receiving or support surface for the battery cells, where the cells are held and / or supported together. The primary contact area faces the battery housing component.

[0051] The battery cell holders preferably have a multi-layered or multi-part structure, such that, for example, the battery cell holders have a metal receiving or support surface for placing and attaching the battery cells. The metal receiving or support surface also enables good heat transfer to or from the battery cells and can further increase the stability of the battery cell holder.

[0052] A number of battery cells can also be pre-mounted on at least one battery cell holder, and the resulting unit can be fully assembled. A particular advantage of this is that during the manufacturing of the battery housing component, only the battery housing component and the at least one mounting component above it are heated locally. Therefore, no thermal damage to the battery cells during assembly is to be expected. The formation of such units facilitates or even enables the use of battery designs with cell-to-pack (C2P) architectures. Page 13 / 76

[0053] P81106WO

[0054] The battery cell holder can be designed to hold virtually any type of battery cell, such as round cells, cylindrical cells, pocket cells, or prismatic cells. The same applies if the at least one component is designed as a battery module with at least one battery cell holder and a plurality of battery cells attached to that holder. In this case, the battery module can have a higher degree of pre-assembly compared to the single battery cell holder with the plurality of battery cells. For example, a battery module can include additional components for monitoring the battery cells, or the battery cells of the module can already be electrically connected. Additionally, the battery module can have electrical connections for the common contacting of the contained battery cells.

[0055] The problem underlying the present invention is further solved by a battery housing for a traction battery having the features of claim 4. Advantageous embodiments of the battery housing component are described in the dependent claims.

[0056] In more detail, the problem underlying the present invention is solved by a battery housing for a traction battery, wherein the battery housing comprises two battery housing components, between which an interior space is formed for receiving a plurality of battery cells and / or at least one battery module with a plurality of battery cells, and at least one installation part which is attached to an inner side of the battery housing, wherein the battery housing has the following features: at least one of the battery housing components has at least one first metal connection area to which the at least one installation part is attached. Page 14 / 76

[0057] P81106WO is connected to at least one of the battery housing components, and the at least one component has a first contact area made of a thermoplastic material, with which the at least one component is attached to the at least one first connection area, wherein the at least one first connection area has a microstructure with undercuts on its surface, and the first contact area of ​​the at least one component is positively connected to the at least one first connection area, and / or the first contact area of ​​the at least one component is connected to the at least one first connection area by means of an adhesion promoter layer.

[0058] The descriptions relating to the design of the battery housing component, its advantages and further embodiments apply accordingly to the design of the battery housing and vice versa, as is obvious to the person skilled in the art from the description.

[0059] The entire battery housing can also be manufactured and supplied using hybrid technology, in accordance with the relevant specifications for the battery housing component, and includes at least one integrated component. The specifications relating to the battery housing component apply accordingly to the battery housing.

[0060] The two battery housing components, when connected, together enclose the interior space for the battery cells, with the battery housing being designed for a traction battery for an electrically powered vehicle. The battery housing components can, in principle, be manufactured independently of each other. Page 15 / 76

[0061] P81106WO may be designed in a tub-like shape, also as a half tub, or in the style of a plate.

[0062] The two battery housing components preferably have a circumferential connecting flange with which the two battery housing components are or can be tightly connected to each other in order to prevent the ingress of moisture and particles.

[0063] The two battery housing components can be functionally identical or similar, although the two battery housing components can be shaped differently.

[0064] One of the battery housing components serves as the base, and the other as the top or cover. The base can be designed as a base tray or base plate, and the top can be a corresponding cover or hood. Furthermore, the base can be part of the vehicle's underbody, and the top can form the floor of the passenger compartment or be part of the passenger compartment floor.

[0065] If only one of the battery housing components has one or more components attached, the other battery housing component can be designed as desired, i.e., even without a first metal connection area.

[0066] In detail, at least one component can be attached to one or each of the battery housing components, as specified above for the battery housing component.

[0067] For example, in at least one of the battery housing components, at least one first connection area on its surface may have a microstructure with undercuts - Page 16 / 76

[0068] P81106WO, and at least one component is positively connected to the at least one first connection area of ​​this battery housing component, and in the other battery housing component, the first contact area of ​​the at least one component is connected to the at least one first connection area by means of an adhesion promoter layer. However, mixed embodiments are also possible, in which at least one first connection area of ​​a battery housing component has a microstructure with undercuts on its surface, and the at least one component is positively connected to the at least one first connection area, and the battery housing component comprises at least one first connection area in which the first contact area of ​​the at least one component is connected to the at least one first connection area by means of an adhesion promoter layer.

[0069] The battery housing can, for example, be formed by one of the above battery housing components together with at least one other battery housing component. Alternatively, the battery housing can be formed by two battery housing components. A further alternative is that the battery housing can be formed by two battery housing components together with the at least one installation component, i.e., without first forming a battery housing component.

[0070] Preferably, the battery housing is designed such that at least one of the battery housing components is made of metal, in particular as a deep-drawn metal part or as a pressed metal component, and the at least one first connection area is part of the at least one of the battery housing components, and / or page 17 / 76

[0071] P81106WO that at least one of the battery housing components has a base body made of plastic, in particular designed as a thermoplastic molded part, and at least one metallic insert, wherein the metallic insert is connected to the base body, and the at least one first connection area is formed on the at least one metallic insert.

[0072] The above statements regarding the battery housing component apply accordingly and in principle independently to each of the battery housing components; that is, each battery housing component can, in principle, be designed independently of the other battery housing components as a metal component or with a base body made of plastic with at least one metallic insert. If no insert is attached to one of the battery housing components, it can, in principle, be designed in any way.

[0073] Preferably, the battery housing is designed such that the at least one installation part comprises at least one battery cell holder, wherein in particular a plurality of battery cells can be attached to or are attached to the at least one battery cell holder, and / or the at least one installation part is designed as a battery module with at least one battery cell holder and a plurality of battery cells attached to the at least one battery cell holder, wherein the at least one first contact area is part of the at least one battery cell holder.

[0074] The above statements regarding the battery housing component apply accordingly and in principle independently to page 18 / 76

[0075] P81106WO each of the battery housing components and at least one installation component, i.e., each of the battery housing components can have a corresponding installation component with at least one battery cell holder or as a battery module attached.

[0076] Typically, the battery cell holders are attached at least to the battery housing component that forms the bottom part of the battery housing.

[0077] Preferably, the battery housing is designed such that the at least one component has a second contact area made of thermoplastic material, with which the at least one component is attached to the corresponding other battery housing component, wherein the corresponding other battery housing component has at least a second connection area made of metal, to which the at least one component is connected, wherein the at least one second connection area has a microstructure with undercuts on its surface, and the second contact area of ​​the at least one component is positively connected to the at least one second connection area, and / or the second contact area of ​​the at least one component is connected to the at least one second connection area by means of an adhesion promoter layer.

[0078] The basic idea here is that at least one component is attached to both battery housing components in the same way. Accordingly, at least one component can extend from the inner sides of the battery housing components through the interior of the battery housing, which allows the battery housing to be designed to be particularly robust overall. If at least one component is designed as a battery cell holder, see page 19 / 76.

[0079] P81106WO: The battery cells are held particularly reliably to the interior with a battery cell holder attached in this way. As with the one-sided attachment of at least one component to only one battery housing component, the risk of thermal damage to the battery cells during assembly is also low when the at least one component is attached to both battery housing components due to the very limited local heating of the battery housing component.

[0080] The first and second connection areas, as well as the first and second contact areas, are named here according to their function. Structural differences are not implied.

[0081] The statements regarding the design and connection of the at least one built-in component with its first contact area to the first connection area apply accordingly to the design and connection of the at least one built-in component with its second contact area to the second connection area.

[0082] By connecting the two battery housing components via at least one mounting part, a particularly stable battery housing can be provided, which is also very cost-effective to manufacture due to the hybrid design.

[0083] The problem underlying the present invention is also solved by a traction battery for a motor vehicle having the features of claim 8.

[0084] More precisely, the problem underlying the present invention is also solved by a traction battery for a motor vehicle, comprising a plurality of battery cells and / or at least one battery module with a plurality of battery cells and a battery housing as described above, wherein the plurality is shown on page 20 / 76.

[0085] P81106WO

[0086] Battery cells and / or at least one battery module containing the majority of battery cells is / are included in the interior of the battery housing.

[0087] The advantages and further embodiments described above relating to the battery housing component and / or the battery housing apply accordingly to the traction battery and vice versa, as is obvious to the person skilled in the art from the description.

[0088] The battery cells are securely held in the traction battery. The battery housing encloses the battery cells, protecting them from environmental influences, moisture, and impacts.

[0089] The problem underlying the present invention is also solved by a motor vehicle with the features of claim 9.

[0090] In more detail, the problem underlying the present invention is also solved by a motor vehicle, in particular an electric motor vehicle with a traction battery as described above, wherein the traction battery is arranged in particular below a passenger cell of the motor vehicle, and wherein preferably one of the battery housing components forms a floor of the passenger cell.

[0091] The advantages and further embodiments described above with regard to the battery housing component, the battery housing and / or the traction battery apply accordingly to the motor vehicle and vice versa, as is obvious to a person skilled in the art from the description. Page 21 / 76

[0092] P81106WO

[0093] By designing the vehicle with one of the battery housing components as the floor of the passenger cell, the vehicle can be manufactured particularly efficiently and with reduced weight.

[0094] In addition to the traction battery and associated electric drive, the vehicle may also have, for example, an internal combustion engine for propulsion. As an electric vehicle, it is equipped solely with an electric drive.

[0095] The problem underlying the present invention is further solved by a method for manufacturing a battery housing component of the above with the features of claim 10. Advantageous embodiments of the method are described in the dependent claims.

[0096] In more detail, the problem underlying the present invention is further solved by a method for manufacturing a battery housing component of the above, comprising a battery housing component with at least one first connection area made of metal and with at least one installation part with a first contact area made of a thermoplastic material, which is attached to an inner side of the battery housing component, comprising the following method steps:

[0097] Machining the at least one first connection area to form a microstructure with undercuts on its surface, and / or applying an adhesion promoter layer to the at least one first connection area and / or the first contact area of ​​the at least one component, positioning the at least one component with its first contact area on the at least one first connection area, page 22 / 76

[0098] P81106WO

[0099] Inductive heating of the at least one first connection area to melt the first contact area of ​​the at least one built-in component, and

[0100] Joining the at least one component with its first contact area to the at least one first connection area by applying a joining pressure to form-fit connection of the first contact area of ​​the at least one component with the at least one first connection area and / or to connect the first contact area of ​​the at least one component to the at least one first connection area by means of the adhesion promoter layer.

[0101] The advantages and further embodiments described above with regard to the battery housing component, the battery housing, the traction battery, and / or the motor vehicle apply accordingly to the method and vice versa, as is obvious to a person skilled in the art from the description. A simple, reliable, and efficient connection of the at least one component to the battery housing component is achieved solely through local, inductive heating of the battery housing component in the area of ​​the first connection point.

[0102] In the first case, with the microstructure, the resulting molten plastic of the first contact area flows into the microstructure under joining pressure, thereby creating a positive-locking connection between the battery housing component and the at least one integrated component, such that the molten plastic of the first contact area solidifies within the corresponding microstructure. In the second case, with the adhesion promoter, the first connection area bonds with the corresponding first contact area via the adhesion promoter under joining pressure. Page 23 / 76

[0103] P81106WO

[0104] The processing of the at least one first connection area to form a microstructure with undercuts on its surface can be carried out in various ways, as further described below. The application of the adhesion promoter layer can also be carried out in various ways. The adhesion promoter layer can be applied to the at least one first connection area and / or to the first contact area of ​​the at least one component. The adhesion promoter layer can, for example, be applied as a film or powder, with the adhesion promoter being applied, for example, to the at least one first connection area or to the first contact area of ​​the at least one component. Adhesion promoters are typically based on a thermoplastic, for example, polypropylene or polyethylene, and are often grafted with maleic anhydrite to bond to metals.The adhesion promoter is typically thermally activated by inductive heating of the at least one first connection area or by joining the at least one component with its first contact area to the at least one first connection area.

[0105] The positioning of the at least one component with its first contact area at the at least one first connection area is preferably carried out such that the at least one component with its first contact area comes into contact with the at least one first connection area, so that the first contact area can be heated quickly and efficiently. The melting of the first contact area of ​​the at least one component thus occurs indirectly via the heating of the at least one first connection area.

[0106] The heating of at least one initial connection area is carried out as inductive heating in order to limit the heating locally. This allows even temperature-sensitive components to be used as built-in parts or parts of built-in parts. Page 24 / 76

[0107] P81106WO will be produced without being thermally damaged during the manufacturing of the battery casing component.

[0108] In the inductive heating of at least one first connection area, a coil is placed on the outer surface of the battery housing component, with a suitable distance between the coil and the outer surface of the battery housing component being selected. The coil then induces eddy currents in the at least one first connection area, which heat the at least one first connection area locally and indirectly heat the corresponding first contact area, melting at least one contact surface. Depending on the design of the coil, an area with a diameter of 4–5 mm can be heated, so that only a small portion of the entire battery housing component is heated.

[0109] Inductive heating is preferably carried out using a coil system with multiple coils. The coils can be positioned together on the outer surface of the battery housing component and simultaneously heat several first connection areas inductively. This allows the process to be carried out quickly. In principle, however, only one coil can also be used to sequentially heat several first connection areas inductively.

[0110] Preferably, the method is designed such that the processing of the at least one first connection area to form a microstructure with undercuts on its surface comprises processing the surface of the at least one first connection area by laser, by etching and / or by electrical discharge machining. Page 25 / 76

[0111] P81106WO

[0112] The corresponding methods for forming microstructures are known in principle to those skilled in the art and therefore do not need to be explained in detail.

[0113] Preferably, the method is designed such that the method comprises a step for producing the at least one component with a compensating material structure, in particular in the form of compensating ribs or compensating points, in its first contact area, and joining the at least one component with its first contact area to the at least one first connection area by applying a joining pressure to form-fit connection of the first contact area of ​​the at least one component with the at least one first connection area and / or to connect the first contact area of ​​the at least one component to the at least one first connection area by means of the adhesion promoter layer, at least partially melting the compensating material structure and compensating for height tolerances of the at least one component to the battery housing component.

[0114] The leveling material structure contains material that can melt and flow to compensate for height differences. This provides an excess of material, allowing for the compensation of unevenness in the first battery housing component and / or tolerances between different initial connection areas.

[0115] The problem underlying the present invention is also solved by a method for manufacturing a battery housing component with the features of claim 13. Page 26 / 76

[0116] P81106WO

[0117] More precisely, the problem underlying the present invention is further solved by a method for manufacturing a battery housing component with a battery housing part and with at least one installation part which is attached to an inner side of the battery housing part, comprising the following method steps:

[0118] Providing the battery housing component with at least one first connection area having an inductively heatable material layer and a connection layer made of a thermoplastic material on the inside,

[0119] Providing at least one built-in component with a first contact area made of a thermoplastic material,

[0120] Positioning the at least one component with its first contact area on the bonding layer of the at least one first bonding area, inductive heating of the inductively heatable material layer in the at least one first bonding area to melt the bonding layer of the at least one first bonding area and the first contact area of ​​the at least one component, and

[0121] Materially coherent connection of the at least one built-in component with its first contact area to the bonding layer of the at least one first bonding area.

[0122] The basic idea here is also a simple, reliable, and efficient connection of components to a battery housing component through merely local, inductive heating of the battery housing component in the area of ​​the first connection point. This allows even temperature-sensitive components to be used as components or parts of components, without [page 27 / 76].

[0123] P81106WO may be thermally damaged during the manufacturing of the battery casing component.

[0124] Inductive heating is achieved as previously described by placing a coil on the outer surface of the battery housing component in the area of ​​at least one first connection region. The coil then induces eddy currents in the inductively heatable material layer, which locally heat the inductively heatable material layer and, above it, the connection layer in the corresponding connection region. Additionally, the corresponding contact area is indirectly heated, at least at one contact surface, resulting in a melt. Depending on the coil design, for example, an area with a diameter of 4–5 mm can be heated, so that only a small portion of the entire battery housing component is heated.

[0125] Inductive heating is preferably carried out using a coil system with multiple coils, as previously described. The coils can be placed together on the outer surface of the battery housing component and simultaneously heat several first connection areas inductively. This allows the process to be carried out quickly. In principle, however, only one coil can also be used to sequentially heat several first connection areas inductively.

[0126] The appropriately designed battery housing component can therefore be manufactured and provided very easily with at least one built-in part, wherein the materially bonded connection between the bonding layer of the first bonding area and the corresponding first contact area of ​​the at least one built-in part is particularly reliable.

[0127] The battery housing component can be connected to the first connection area with the inductively heated material layer and page 28 / 76

[0128] P81106WO, the bonding layer made of thermoplastic material, can be produced simply and cost-effectively.

[0129] Details regarding the design of at least one first connection area are given below.

[0130] The above statements apply accordingly to the design of the battery housing component. Thus, the battery housing component can, for example, be tray-shaped, also known as a half-tub, or designed in the form of a plate, and can form a housing base or a housing cover of a battery housing. The interior is defined here as well by the placement of at least one component and by the increasing number of battery cells.

[0131] The above statements also apply accordingly to the design of the at least one component. Identical components can be used as for the method described above.

[0132] The bonding layer made of thermoplastic material can be produced from a variety of materials in a thermoplastic forming process, including combinations thereof. A thermoplastic manufacturing and forming process such as compression molding or injection molding can be used for this purpose. The bonding layer can, for example, be made of a thermoplastic material such as polypropylene (PP) or polyamide 6 (PA 6), which are known in the industry under the names given. Organosheets or crossplies can also be used for the bonding layer. Crossplies are fiber-reinforced plastics, such as glass fiber-reinforced polypropylene (GFPP), which preferably have a structure with multiple fiber layers embedded in a plastic material. Page 29 / 76

[0133] P81106WO

[0134] Preferably, the method is designed such that the provision of the battery housing component with at least one first connection area, which has an inductively heatable material layer and a connection layer made of a thermoplastic material on the inside, comprises one of the following steps:

[0135] Providing the battery housing component with a particularly continuous inductively heatable material layer, wherein in the at least one first connection area the connecting layer is applied to the inside of the inductively heatable material layer, and / or providing the battery housing component with a particularly continuous thermoplastic layer made of the thermoplastic material, wherein in the at least one first connection area the inductively heatable material layer is applied to the outside of the thermoplastic layer, and / or providing the battery housing component with a particularly continuous thermoplastic layer made of the thermoplastic material, wherein in the at least one first connection area the inductively heatable material layer is embedded in the thermoplastic layer.

[0136] The at least one first connection area can thus be provided in the battery housing component in different ways, allowing the process to be well adapted and flexibly implemented. The embodiments described above relate only to the design of the at least one first connection area with the inductively heatable material layer and the connection layer made of the thermoplastic material. Additionally, the battery housing component can be further [page 30 / 76].

[0137] P81106WO

[0138] have layers, for example a structural layer that defines the shape of the battery housing component.

[0139] As indicated here, the inductively heated material layer and / or the bonding layer can also define the shape of the battery housing component, at least section by section, for example, by the inductively heated material layer and / or the bonding layer being designed as continuous layers and forming, for example, a base body or at least a part of the base body of the battery housing component. For example, the inductively heated material layer can be designed as a metal tray that defines the shape of the battery housing component, and the bonding layer can form a continuous or local coating of it, which includes the at least one first bonding area.

[0140] Accordingly, the respective first connection area can be formed by applying the bonding layer to the inside of the inductively heatable material layer, and / or by applying the inductively heatable material layer to the outside of the thermoplastic layer. The inductively heatable material layer can also be embedded in the thermoplastic layer in at least one first connection area. In the latter case, for example, the bonding layer made of the thermoplastic material can form the base body of the battery housing component, and the inductively heatable material layer is locally, completely, or partially embedded in the thermoplastic layer.

[0141] Depending on the design, the thermoplastic layer can form the bonding layer completely or partially in the area of ​​the corresponding connection area.

[0142] Preferably, the method is designed such that page 31 / 76

[0143] P81106WO the provision of the battery housing component with at least one first connection area having an inductively heatable material layer and on the inside a connection layer made of a thermoplastic material, comprising one of the following steps:

[0144] Providing the inductively heatable material layer as a metal sheet, and / or

[0145] Providing the inductively heatable material layer as a wire mesh, in particular as a wire net.

[0146] Providing the inductively heatable material layer as a metal sheet is particularly suitable for manufacturing, for example, the base body of the battery housing component from the inductively heatable material layer, whereby the metal sheet can also be embedded in the thermoplastic layer or attached to its exterior. Providing the inductively heatable material layer as a wire mesh, in particular as a wire grid, is particularly suitable for embedding the inductively heatable material layer in the thermoplastic layer or attaching it to its exterior. The wire mesh typically has a lower weight than a correspondingly shaped metal sheet.

[0147] Preferably, the method is designed such that the method comprises a step for providing the at least one component with at least one battery cell holder, wherein in particular a plurality of battery cells are attached to the at least one battery cell holder, and / or the method comprises a step for providing the at least one component as a battery module with at least one battery cell holder and a plurality of battery cells attached to the at least one battery cell holder. Page 32 / 76

[0148] P81106WO cell holders are attached, comprising , wherein the at least one first contact area is part of the at least one battery cell holder .

[0149] Battery cell holders are crucial for mounting the battery cells, making reliable positioning and attachment of the holders essential. For mounting the battery cells, the holders can have a receiving or support surface on which the battery cells are collectively held and / or supported. The first contact area faces the battery housing component. The battery cell holders preferably have a multi-layered or multi-part structure, such that, for example, they include a metal receiving or support surface for supporting and attaching the battery cells, for heat transfer to and from the battery cells, and for increasing the holder's stability.

[0150] A number of battery cells can also be pre-mounted on at least one battery cell holder, and the resulting unit can then be installed as a single component. A particular advantage of this is that during the manufacturing of the battery housing component, only the battery housing component and the at least one component above it are heated locally. Therefore, no thermal damage to the battery cells during assembly is to be expected.

[0151] Furthermore, during inductive heating, at least one first metal connection area or the inductively heatable material layer in the corresponding connection area shields the applied alternating field from the interior of the housing, thus protecting the battery cells from these electromagnetic fields. The formation of such units facilitates or enables the use of battery designs with cell-to-pack (C2P) architectures. Page 33 / 76

[0152] P81106WO

[0153] The battery cell holder can be designed to hold virtually any type of battery cell, such as round cells, cylindrical cells, pocket cells, or prismatic cells. The same applies if the at least one component is designed as a battery module with at least one battery cell holder and a plurality of battery cells attached to that holder. In this case, the battery module can have a higher degree of pre-assembly compared to the single battery cell holder with the plurality of battery cells. For example, a battery module can include additional components for monitoring the battery cells, or the battery cells of the module can already be electrically connected. Additionally, the battery module can have electrical connections for the common contacting of the contained battery cells.

[0154] The battery cells can, for example, be glued to at least one battery cell holder.

[0155] The problem underlying the present invention is further solved by a method for manufacturing a battery housing of the above with the features of claim 17.

[0156] More precisely, the problem underlying the present invention is further solved by a method for manufacturing the above-mentioned battery housing, wherein the battery housing comprises two battery housing components, between which an interior space for receiving a plurality of battery cells and / or at least one battery module with a plurality of battery cells is formed, and at least one installation part that is attached to an inner side of the battery housing, comprising the following method steps: Page 34 / 76

[0157] P81106WO

[0158] Manufacturing a battery housing component using the above method, wherein at least one of the components has a second contact area made of a thermoplastic material, providing a battery housing component with at least one second connection area made of metal, machining the at least one second connection area to form a microstructure with undercuts on its surface, or applying an adhesion promoter layer to the at least one second connection area and / or the second contact area of ​​the at least one component, positioning the battery housing component relative to the battery housing component such that the at least one component is positioned with its second contact area on the at least one second connection area.

[0159] Inductive heating of at least one second connection area to melt the second contact area of ​​at least one of the built-in parts, and

[0160] Joining the at least one of the installation parts with its second contact area to the at least one second connection area by applying a joining pressure to create a positive connection of the second contact area of ​​the at least one of the installation parts to the at least one second connection area or to connect the second contact area of ​​the at least one of the installation parts to the at least one second connection area with the adhesion promoter layer.

[0161] The above refers to the battery housing component, the battery housing, the traction battery, the motor vehicle and / or page 35 / 76

[0162] The advantages and further embodiments described in the method for manufacturing the battery housing component described in P81106WO apply accordingly to the method and vice versa, as is obvious to the person skilled in the art from the description.

[0163] The basic idea behind the battery housing manufacturing process is a simple and efficient production method using a hybrid technique with at least one integrated component. This component is inserted into the battery housing and attached to it on both sides, i.e., to both battery housing components. This results in a stable battery housing. Because the battery housing components are heated locally and inductively only in the connection areas, no thermal damage to the battery cells during assembly is to be expected. Furthermore, the metal connection areas provide electromagnetic shielding from the alternating field used for inductive heating of the respective connection area, away from the interior of the battery housing.This allows the connection of the battery housing components with at least one installation part to be carried out reliably, even if the battery cells, individually or as a battery module ( e ), are already mounted in the housing.

[0164] The method for manufacturing the battery housing can directly refer to the method for manufacturing the battery housing component in order to manufacture the battery housing component. Furthermore, the underlying concepts of the method for manufacturing the battery housing component can be used to connect the at least one component with its second contact area to the at least one second connection area. Page 36 / 76

[0165] P81106WO

[0166] The details regarding the design of the second contact area therefore correspond to those regarding the design of the first contact area. Likewise, the details regarding the design of the second connection area correspond to those regarding the design of the first connection area. Similarly, the details regarding the connection of the at least one second connection area and the second contact area of ​​the at least one component correspond to those regarding the connection of the at least one first connection area and the first contact area of ​​the at least one component.

[0167] Furthermore, it should be noted that the first and second connection areas and contact areas can each be individually designed within the scope of the invention. Thus, each component can be individually joined to the corresponding first or second connection area with its first or second contact area, i.e., either to create a positive-locking connection of the contact area to the corresponding connection area or to connect the contact area of ​​the component to the adhesive layer. In principle, a component with its two contact areas can be joined in the same way or in different ways.

[0168] In detail, the battery housing component is provided first, wherein at least one mounting part is attached to the battery housing component, as specified above for the battery housing component. This means that the at least one mounting part is already fixed in position, and the battery housing component can be easily connected to the battery housing component to manufacture the battery housing. If the at least one mounting part includes at least one battery cell holder to which a plurality of battery cells are attached, and / or the at least one mounting part is shown on page 37 / 76

[0169] P81106WO

[0170] If the battery module is designed with at least one battery cell holder and a plurality of battery cells attached to the at least one battery cell holder, these can already be reliably positioned and accommodated in the battery housing.

[0171] Manufacturing the traction battery requires additional steps for electrically connecting the battery cells and, if necessary, the integration of further components, without this having a fundamental impact on the manufacturing of the battery housing or the traction battery itself. These steps can be directly incorporated into the battery housing manufacturing process described here to produce the traction battery.

[0172] The sequence of individual steps can, in principle, be chosen arbitrarily, and the sequence can also be chosen arbitrarily together with the individual steps for manufacturing the battery housing component.

[0173] The problem underlying the present invention is additionally solved by a method for manufacturing a battery housing with the features of claim 18.

[0174] More precisely, the problem underlying the present invention is further solved by a method for manufacturing the above-mentioned battery housing, wherein the battery housing comprises two battery housing components, between which an interior space is formed for receiving a plurality of battery cells and / or at least one battery module with a plurality of battery cells, and at least one installation part that is attached to the inner sides of both battery housing components, comprising the following method steps: Page 38 / 76

[0175] P81106WO

[0176] Manufacturing two battery housing components using the above method, wherein at least one of the components of at least one of the two battery housing components has a second contact area made of a thermoplastic material, and wherein at least one of the battery housing components of the two battery housing components has at least a second connecting area made of metal.

[0177] Machining the at least one second connection area of ​​the at least one battery housing component to form a microstructure with undercuts on its surface, or applying an adhesion promoter layer to the at least one second connection area and / or the second contact area of ​​the at least one of the components, positioning the two battery housing components relative to each other so that the at least one of the components is positioned with its second contact area on the at least one second connection area of ​​the battery housing component of the corresponding other battery housing component,

[0178] Inductive heating of at least one second connection area of ​​at least one of the battery housing components of the two battery housing components to melt the second contact area of ​​at least one of the components, and

[0179] Joining at least one of the installation parts of at least one of the two battery housing components with its second contact area to the at least one second connection area of ​​the respective other battery housing component by applying a joining pressure to create a positive-locking connection of the second contact area of ​​the at least one of the installation parts to the at least one second page 39 / 76

[0180] P81106WO

[0181] Connection area or for connecting the second contact area of ​​at least one of the installation parts to the at least one second connection area with the adhesion promoter layer.

[0182] The advantages and further embodiments described above with regard to the battery housing component, the battery housing, the traction battery, the motor vehicle, the method for manufacturing the battery housing component and / or the above method for manufacturing a battery housing apply accordingly to the method given here and vice versa, as is obvious to the person skilled in the art from the description.

[0183] In contrast to the above method for manufacturing the battery housing, which is based on the use of a single battery housing component, the method described here involves joining two battery housing components together. This means that at least one component is attached to each of the battery housing components. In the method described here, it is sufficient if at least one component from one of the battery housing components is additionally attached to the other battery housing component. However, it is also possible for at least one component from each of the battery housing components to be additionally attached to the other battery housing component.

[0184] The basic idea behind the battery housing manufacturing process is, again, a simple and efficient production of the battery housing with at least one integrated component using a hybrid technology, as already explained in detail above. As already explained in detail there, the metal connection areas provide electromagnetic shielding of the alternating field used for inductive heating of the first (page 40 / 76).

[0185] P81106WO or the second connection area from the interior of the battery housing and allow only local heating of the respective connection area and above it of the corresponding first or second contact area.

[0186] The battery housing components are manufactured as described above and then used to manufacture the battery housing. Furthermore, the underlying principles of the method for manufacturing the battery housing component can be used to connect the at least one component with its second contact area to the at least one second connection area.

[0187] The details regarding the design of the second contact area therefore correspond to those regarding the design of the first contact area. Likewise, the details regarding the design of the second connection area correspond to those regarding the design of the first connection area. Similarly, the details regarding the connection of the at least one second connection area and the second contact area of ​​the at least one component correspond to those regarding the connection of the at least one first connection area and the first contact area of ​​the at least one component.

[0188] Furthermore, it should be noted that the first and second connection areas and contact areas can each be individually designed within the scope of the invention. Thus, each component can be individually joined to the corresponding first or second connection area with the first or second contact area, i.e., either to create a positive-locking connection of the contact area to the corresponding connection area or to connect the contact area of ​​the component to the corresponding connection area with the adhesive. Page 41 / 76

[0189] P81106WO layer. In principle, a component with its two contact areas can be joined in the same way or in different ways.

[0190] In detail, the battery housing components are first manufactured, each with its own battery housing component and at least one attached component, as described above for the battery housing component. This ensures that the at least one attached component is already firmly positioned, and the battery housing components can be easily connected to form the battery housing. If the at least one attached component includes at least one battery cell holder to which a plurality of battery cells are attached, and / or if the at least one attached component is designed as a battery module with at least one battery cell holder and a plurality of battery cells attached to that holder, these can already be reliably positioned and installed in the battery housing. The traction battery can then be manufactured with additional steps, as already described in detail above.

[0191] The problem underlying the present invention is also solved by a method for manufacturing a battery housing with the features of claim 19.

[0192] In more detail, the problem underlying the present invention is also solved by a method for manufacturing a battery housing, wherein the battery housing comprises two battery housing components, between which an interior space for receiving a plurality of battery cells and / or at least one battery module with a plurality of battery cells is formed, and at least one installation part that is attached to an inner side of the battery housing, comprising the following method steps: Page 42 / 76

[0193] P81106WO

[0194] Manufacturing a battery housing component using the above method according to any one of claims 10 to 16, wherein at least one of the components has a second contact area made of a thermoplastic material, providing a battery housing component with at least one second connection area having an inductively heatable material layer and a connection layer made of a thermoplastic material on the inside, positioning the battery housing component relative to the battery housing component such that the at least one of the components is positioned with its second contact area on the connection layer of the at least one second connection area, inductively heating the inductively heatable material layer in the at least one second connection area to melt the connection layer of the at least one second connection area and the second contact area of ​​the at least one of the components.and,

[0195] Materially coherent connection of at least one of the installation parts with its second contact area with the bonding layer of the at least one second bonding area.

[0196] The problem underlying the present invention is also solved by a method for manufacturing a battery housing with the features of claim 20.

[0197] More precisely, the problem underlying the present invention is also solved by a method for manufacturing a battery housing, wherein the battery housing comprises two battery housing components, between which an interior space for receiving (page 43 / 76)

[0198] P81106WO is formed from a plurality of battery cells and / or at least one battery module with a plurality of battery cells, and comprises at least one installation part that is attached to an inside of the battery housing, comprising the following process steps:

[0199] Manufacturing two battery housing components using the above method according to one of claims 13 to 16, wherein at least one of the components of at least one of the two battery housing components has a second contact area made of a thermoplastic material, and wherein at least one of the battery housing components of the two battery housing components has at least one second connection area, which has an inductively heatable material layer and a connection layer made of a thermoplastic material on the inside, positioning the two battery housing components relative to each other such that the at least one of the components is positioned with its second contact area on the connection layer of the at least one second connection area.Inductive heating of the inductively heatable material layer in the at least one second connection area to melt the connection layer of the at least one second connection area and the second contact area of ​​the at least one of the installation parts, and,

[0200] Materially coherent connection of at least one of the installation parts with its second contact area with the bonding layer of the at least one second bonding area.

[0201] Both of the above methods also enable simple and efficient manufacturing of the battery housing. In this process, at least one component is inserted into the battery housing (page 44 / 76).

[0202] P81106WO and attached to it on both sides, i.e., to both battery housing components. This ensures a stable battery housing. Due to the local, inductive heating of the battery housing components only in the connection areas, no thermal damage to the battery cells inserted therein is to be expected during assembly. Furthermore, the inductively heatable material layer provides electromagnetic shielding of the alternating field used for inductive heating of the respective connection area from the interior of the battery housing. This allows the connection of the battery housing components to the at least one installation component to be reliably carried out, even if the battery cells, individually or as a battery module(s), are already housed in the casing.

[0203] The process for manufacturing the battery housing component can also be directly applied to both of the preceding methods for manufacturing the battery housing component. Furthermore, the underlying concepts of the process for manufacturing the battery housing component can be applied to connecting the at least one component with its second contact area to the bonding layer of the at least one second bonding area.

[0204] The details regarding the design of the second contact area therefore correspond to those regarding the design of the first contact area. Likewise, the details regarding the design of the second connection area correspond to those regarding the design of the first connection area. Similarly, the details regarding the connection of the at least one second connection area and the second contact area of ​​the at least one component correspond to those on page 45 / 76.

[0205] P81106WO on the connection of the at least one first connection area and the first contact area of ​​the at least one built-in part.

[0206] Furthermore, it should be noted that the first and second connection areas and contact areas can each be individually designed within the scope of the invention.

[0207] In detail, the battery housing component is provided first, with at least one insert attached to the battery housing component, as specified above for the battery housing component. This means that the at least one insert is already fixed in position, and the battery housing component can be easily connected to the battery housing component or the other battery housing component to manufacture the battery housing. The same applies to the provision of two battery housing components.

[0208] The advantages and further embodiments described above with regard to the battery housing component, the battery housing, the traction battery, the motor vehicle, the methods for manufacturing the battery housing component and / or the above methods for manufacturing a battery housing apply accordingly to the methods given here and vice versa, as is obvious to the person skilled in the art from the description.

[0209] The material-fit connection of at least one of the components with its second contact area to the bonding layer of the at least one second bonding area is usually carried out by applying a joining pressure.

[0210] The sequence of the individual steps can, in principle, be chosen arbitrarily, and the sequence can also be combined arbitrarily with page 46 / 76.

[0211] P81106WO can be selected in individual steps for manufacturing the battery housing components.

[0212] Further advantages, details, and features of the invention will become apparent from the illustrated examples below. Specifically, the following will be shown:

[0213] Figure 1: a schematic sectional view of a battery housing component of a traction battery according to the invention, comprising a battery housing component, an installation part with several battery cell holders and battery cells held thereon during the joining of the installation part according to a first, preferred embodiment of the present invention;

[0214] Figure 2: a schematic detail view from Fig. 1, showing a first connection area of ​​the battery housing component and a first contact area of ​​the component during joining;

[0215] Figure 3: a schematic representation of the joining of a first connection area of ​​the battery housing component and a first contact area of ​​the insert of an insert immediately before joining, during joining and after joining in accordance with the representation in Fig. 1;

[0216] Figure 4: a schematic detail view showing a first connection area of ​​the battery housing component and a first contact area with an interposed adhesion promoter layer during joining, according to a second embodiment; page 47 / 76

[0217] P81106WO

[0218] Figure 5: a schematic representation of a traction battery with a battery housing comprising the battery housing component from Fig. 1 and a battery housing component according to a third embodiment;

[0219] Figure 6: a schematic representation of a motor vehicle with the traction battery from Fig. 5 according to a fourth embodiment;

[0220] Figure 7: a schematic representation of a first connection area with a microstructure in accordance with Fig. 2;

[0221] Figure 8: a schematic detail view of the microstructure from Fig. 7 with two undercuts in accordance with Fig. 2;

[0222] Figure 9: a flow diagram of a process for manufacturing the battery housing component from Fig. 1; and

[0223] Figure 10: a flow diagram of a process for manufacturing the battery housing of the traction battery from Fig. 5.

[0224] In the following description, identical reference numerals denote identical components or identical features, so that a description of a component given 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 applied separately to other embodiments. Page 48 / 76

[0225] P81106WO

[0226] Figure 1 shows a battery housing component 1 of a battery housing 2 of a traction battery 3 according to a first embodiment. The battery housing 2 and the traction battery 3 are shown together in Figure 5.

[0227] The battery housing component 1 comprises a battery housing part 4 and an installation part 5 with several battery cell holders 6 and battery cells 7 held therein. In this exemplary embodiment, the battery cell holders 6 of the installation part 5 are all designed as thermoplastic molded parts made of a thermoplastic material.

[0228] The mounting component 5 is attached to an inner surface 8 of the battery housing component 4. The battery housing component 4 is designed in a trough shape, and the inner surface 8 is defined by the mounting component 5. In this exemplary embodiment, the battery housing component 4 is designed as a deep-drawn metal part and manufactured in a manner known per se. For example, the battery housing component 4 is manufactured from sheet steel or sheet aluminum.

[0229] The battery housing component 4 has a plurality of first connection areas 9. These are corresponding areas of the battery housing component 4 that are designed as connection areas 9 for connection with the installation part 5.

[0230] For this purpose, microstructures 10 with undercuts 11 are formed on the surface of the battery housing component 4 in the first connection areas 9. An exemplary microstructure 10 with undercuts 11 is shown in Figure 7, with two additional undercuts 11 shown individually in Figure 8. Page 49 / 76

[0231] P81106WO

[0232] In this embodiment, the undercuts 11 extend from their base 12 on the corresponding first connecting part and have at least partially a greater width b than at the base 12, as shown in Figure 8 by the minimum width bmin and the maximum width b max is indicated. Further parameters of the undercuts 11 can be additionally selected to shape the connection of the first connection area with the first contact area in the desired way, for example a distance SA of the undercuts 11 to each other or a height extension t of the undercuts 11 from the base 12.

[0233] The installation part 5 has first contact areas 13 on the battery cell holders 6 for connection with the battery housing component 4, which here are made of a thermoplastic material in accordance with the design of the battery cell holders 6.

[0234] The component 5 is positively connected to the battery housing component 4. Specifically, the first contact areas 13 of the component 5 are positively connected to the first connection areas of the battery housing component 4. This positive connection is achieved by the first contact areas 13 of the component engaging with the microstructures 10 with undercuts 11 on the surface of the respective first connection area 9. The positive connection is established such that the microstructures 10 with the undercuts 11 are each surrounded by material from the corresponding first contact area 13 of the component 5 when heated, and after cooling and solidifying, the microstructure 10 is permanently surrounded by this material.

[0235] Here, the installation part 5 is defined as a single component with the battery cell holders 6 and the battery cells 7. Alternatively, the battery cell holders 6 can also be individually described on page 50 / 76.

[0236] P81106WO

[0237] The installation components 5 are attached to the battery housing component 4 in the manner described above.

[0238] The installation part 5 has several first contact areas 13, which are arranged separately on the battery cell holders 6 for connection with the first connection areas 9 of the battery housing component 4.

[0239] The following describes a method for manufacturing the above battery housing component 1, as illustrated in Figure 9.

[0240] The process begins in step S 100 with the provision of the installation part 5, which comprises a plurality of battery cell holders 6, wherein a plurality of battery cells 7 are attached to the battery cell holders. In this exemplary embodiment, the battery cells 7 are bonded to the battery cell holders 6. In addition, the battery cell holders 6 are connected to each other by a connecting element 14.

[0241] Step S 110 involves processing the first connection areas 9 to form the microstructures 10 with undercuts 11 on their surfaces.

[0242] In this exemplary embodiment, the processing of the first connection areas 9 to form the microstructures 10 with undercuts 11 on their surfaces comprises processing the surfaces of the first connection areas 9 by means of laser, etching and / or electrical erosion.

[0243] The corresponding methods for forming the microstructures 10 are known in principle to those skilled in the art and are therefore not explained in detail. Page 51 / 76

[0244] P81106WO

[0245] Step S 120 involves positioning the component 5 with the first contact areas 13 at the first connection areas 9.

[0246] The positioning of the installation part 5 with the first contact areas 13 on the first connection areas 9 is carried out in such a way that the installation part 5 with its first contact area 13 comes into contact with the first connection areas 9, as shown in the left partial view of Figure 3.

[0247] Step S 130 involves inductive heating of the first connection areas 9 to melt the first contact areas 13 of the built-in part 5.

[0248] The transfer of the first contact areas 13 of the built-in part 5 into molten metal is therefore carried out indirectly by heating the corresponding first connection areas 9, which are in contact with the first contact areas 13.

[0249] The inductive heating of the first connection areas 9 is achieved using a coil system 16 with a plurality of coils 17. The coils 17 are positioned at intervals of approximately 5–10 mm on an outer surface 18 of the battery housing component 4 in the area of ​​the first connection areas 9. The coils 17 induce eddy currents in the first connection areas 9, which heat the first connection areas 9 locally and indirectly heat the corresponding first contact area 13, melting at least one contact surface. By using the coil system 16 with multiple coils 17, several first connection areas 9 can be inductively heated simultaneously. Depending on the design of the coils 17, areas with a diameter of 4–5 mm or correspondingly larger areas can be heated. Page 52 / 76

[0250] P81106WO

[0251] The inductive heating of the first connection areas 9 limits the heating locally, with the battery housing component 4 also providing electromagnetic shielding of the alternating field used for the inductive heating of the first connection areas 9 from an interior 15 of the battery housing 2. This allows the component 5 to be mounted with the battery cells 7 without thermal damage and without risk of damage from eddy currents induced in the battery cells 7.

[0252] Alternatively, the process can also be carried out with only one coil 17 by sequentially heating the first connection areas 9 inductively. Several first connection areas 9 can also be sequentially heated inductively in groups using the coil system 16.

[0253] Step S 140 involves joining the component 5 with its first contact areas 13 to the first connection areas 9 by applying a joining pressure to form a positive connection of the first contact areas 13 of the component 5 with the first connection areas 9.

[0254] During joining, the molten plastic formed in step S 130 flows under joining pressure into the corresponding microstructures 10 of the first contact areas 13, thereby creating a positive-locking connection between the battery housing component 4 and the installation component 5 such that the molten plastic of the first contact area 13 solidifies in the corresponding microstructure 12. This process is illustrated in the middle and right partial views of Figure 3.

[0255] A battery housing component 2 according to a second embodiment is described with reference to Figure 4. Page 53 / 76

[0256] P81106WO

[0257] The battery housing component 2 of the second embodiment is based on the battery housing component 2 of the first embodiment. In contrast, in the battery housing component 2 of the second embodiment, the first connection areas 9 are designed without microstructures 10. However, an adhesion promoter layer 19 is provided between the first connection areas 9 and the first contact areas 13, thereby connecting the first connection areas 9 to the first contact areas 13.

[0258] The process for manufacturing the battery housing component 2 of the second embodiment also corresponds essentially to the process described above with steps S 100 to S 140. Only steps S 110 and S 140 differ and are therefore described as steps S 110' and S 140'.

[0259] In detail, an alternative step S 110 ' is carried out, in which an adhesion promoter layer in the form of an adhesion promoter film is positioned at the first joining areas 9 and / or the first contact areas 13.

[0260] Furthermore, an alternative step S 140' is carried out to join the component 5 with its first contact areas 13 to the first connection areas 9 by applying a joining pressure. In this process, the first contact areas 13 of the component 5 are joined to the corresponding first connection areas 9 by means of the adhesion promoter layer 19.

[0261] Figure 5 shows the traction battery 3 with the battery housing 2, which encloses the installation part 5 with the battery cells 7. Figure 5 thus relates to a third embodiment.

[0262] The battery housing 2 of Figure 5 is based on the battery housing component 1 of the first embodiment, wherein the battery housing component 1 is only a logical unit within the page 54 / 76

[0263] P81106WO

[0264] Battery housing 2 is represented. Although the battery housing 2 can be manufactured using the battery housing component 1 of the first embodiment, as detailed below, it is not possible to distinguish in the finished battery housing 2 whether such a battery housing component 1 was used to manufacture the battery housing 2 of Figure 5. Details of the battery housing 2 of the third embodiment correspond, unless explicitly described, in case of doubt to those of the battery housing component 1 of the first embodiment. Therefore, the same reference numerals are used for identical or at least similar features.

[0265] The battery housing 2 of the third embodiment comprises two battery housing components 4, between which an interior space 15 is formed for receiving a plurality of battery cells 7, and at least one installation part 5, which is attached to an inner surface 8 of the battery housing 2.

[0266] The two battery housing components 4 are designed independently of each other in a trough shape, as shown in Figure 5. In this exemplary embodiment, the battery housing components 4 are designed as deep-drawn metal parts and manufactured in a manner known per se. For example, the battery housing components 4 are made of sheet steel or sheet aluminum. Each of the two battery housing components 4 has a circumferential connecting flange 20, with which the two battery housing components 4 are tightly connected to each other.

[0267] The two battery housing components 4 are functionally identical or similar in design, but have different shapes. One of the battery housing components 4 is designed as a base, and the other battery housing component 4 is designed as a top or cover. Page 55 / 76

[0268] P81106WO

[0269] Here too, the installation part 5 is designed with several battery cell holders 6 and battery cells 7 held therein. In this exemplary embodiment, the battery cell holders 6 of the installation part 5 are all designed as thermoplastic molded parts made of a thermoplastic material.

[0270] One of the battery housing components 4 has a plurality of first connection areas 9 at which the installation part 5 is connected to the battery housing component 4. These are corresponding areas of the battery housing component 4 that are designed as first connection areas 9 for connection with the installation part 5.

[0271] For this purpose, microstructures 10 with undercuts 11 are formed on the surface of the battery housing component 4 in the first connection areas 9, as described above for the first connection areas 9 of the battery housing component of the first embodiment.

[0272] The installation part 5 has first contact areas 13 on the battery cell holders 6 for connection with the battery housing component 4, which here are made of a thermoplastic material in accordance with the design of the battery cell holders 6.

[0273] The component 5 is positively connected to the battery housing component 4. In detail, the first contact areas 13 of the component 5 are positively connected to the first connection areas 9 of the battery housing component 4. The positive connection is achieved in detail by the first contact areas 13 of the component 5 engaging in the microstructures 10 with the undercuts 11 on the surface of the respective first connection area 9. The positive connection is thus created such that the micro- Page 56 / 76

[0274] P81106WO

[0275] Structures 10 with undercuts 11 each are surrounded by a material of the corresponding first contact area 13 of the built-in part 5 in the heated state and, after cooling and solidifying, permanently surround the microstructure 10.

[0276] In this respect, the battery housing 2 corresponds to the previously described battery housing component 1.

[0277] In the battery housing 2 described here, the insert 5 has several secondary contact areas 21 made of thermoplastic material, by which the insert 5 is additionally attached to the corresponding other battery housing component 4. The secondary contact areas 21 are also located on the battery cell holders 6 and, in accordance with the design of the first contact areas 13, are made of a thermoplastic material.

[0278] The corresponding other battery housing component 4 comprises several secondary connection areas 22 to which the installation component 5 is connected. These are corresponding areas of this battery housing component 4 that are designed as secondary connection areas 22 for connection with the installation component 5.

[0279] For this purpose, microstructures 10 with undercuts 11 are formed on the surface of the battery housing component 4 in the second connection areas 22, as described above for the first connection areas 9 of the battery housing component of the first embodiment.

[0280] The component 5 is also positively connected to the other battery housing component 4, as previously described for the connection of the first connection areas 9 with the first contact areas 13. The positive connection is achieved in detail by inserting the second contact areas 21 of the component 5 into the microstructures 10 with the undercuts (page 57 / 76).

[0281] P81106WO

[0282] 11 engages the surface of the respective second connection area 22. The form-fitting connection is produced in such a way that the microstructures 10 with the undercuts 11 are each surrounded by a material of the corresponding second contact area 21 of the installation part 5 in the heated state and, after cooling and solidifying, permanently surround the microstructure 10.

[0283] As a result, the installation part 5 is attached to both battery housing components 4 in the same way and extends from the inner sides 8 of the battery housing components 4 through the interior 15 of the battery housing 2 .

[0284] The first and second connection areas 9, 22, as well as the first and second contact areas 13, 21, are named here according to their function. Structural differences are not implied.

[0285] The descriptions relating to the design and connection of the installation part 5 with its first contact areas 13 with the first connection areas 9 apply accordingly to the design and connection of the installation part 5 with its second contact areas 21 with the second connection areas 22 .

[0286] Figure 6 shows a motor vehicle 23 according to a fourth embodiment. The motor vehicle 23 is designed here as an electric vehicle and includes a traction battery 3. As shown in Figure 6, the traction battery 3 is arranged below a passenger cell 24 of the motor vehicle 3. One of the battery housing components 4 forms a floor of the passenger cell 24, while the other battery housing component 4 forms a floor surface of the motor vehicle 23. Page 58 / 76

[0287] P81106WO

[0288] The traction battery 3 with the battery housing 2 correspond to the above specification, so a further description is omitted here.

[0289] Figure 10 shows a flow diagram of a process for manufacturing the battery housing 2 of the above traction battery 3.

[0290] As described above, the battery housing 2 is manufactured with two battery housing components 4, between which an interior space 15 is formed for receiving a plurality of battery cells 7, and an installation part 5, which is attached to an inner surface 8 of the battery housing 2.

[0291] The process begins in step S200 with the production of a battery housing component 1 using the method described above. Step S200 thus comprises steps S100 to S140 above, in which the battery housing component 1 is produced with a battery housing part 4 and the insert part 5. The insert part 5 is therefore fixedly positioned on the corresponding battery housing part 4. As an additional feature, the insert part 5 is provided with second contact areas 21 made of a thermoplastic material on the battery cell holder 6, wherein the second contact areas 21 are arranged at opposite ends of the battery cell holder 6.

[0292] The details regarding the design of the second contact area 21 correspond to those regarding the design of the first contact area 13.

[0293] Step S210 involves providing a battery housing component 4 with several secondary connection areas 22 made of metal. Page 59 / 76

[0294] P81106WO

[0295] The details regarding the design of the second connection areas 22 also correspond to those regarding the design of the first connection area 9.

[0296] Step S220 involves machining the second connection areas 22 to form a microstructure 10 with undercuts 11 on its surface. Step S220 thus corresponds to step 110 above, except that here the microstructures 10 are formed in the second connection areas 22. The machining is carried out identically for the microstructures 10 of the first and second connection areas 9, 22.

[0297] Step S230 involves positioning the battery housing component 4 relative to the battery housing component 1, so that the installation part 5 with its second contact areas 21 is positioned at the second connection areas 22.

[0298] Step S240 involves inductive heating of the second connection areas 22 to transfer the second contact areas

[0299] 21 of the built-in part 5 in melt. This step corresponds to step S 130 above, where the second connection areas are

[0300] 22 are inductively heated with the coil system 16 .

[0301] Step S250 involves joining the component 5 with its second contact areas 21 to the second connection areas 22 by applying a joining pressure to create a positive-locking connection between the second contact areas 21 of the component 5 and the second connection areas. This step corresponds in principle to step S140 above, except that here the second connection areas 22 and the second contact areas 21 are positively connected to each other.

[0302] In summary, it should be noted that the installation part 5 is inserted into the battery housing 2 and attached to it on both sides, i.e., on both sides. Page 60 / 76

[0303] P81106WO is attached to the battery housing components 4. Local inductive heating of the connection areas 9, 22 is carried out, wherein the metal connection areas 9, 22 provide electromagnetic shielding of the alternating field used for inductive heating of the connection areas from the interior 15 of the battery housing 2.

[0304] To manufacture the traction battery 3, additional steps can be carried out, for example, to electrically connect the battery cells 7 and, if necessary, to introduce further components, without these having a fundamental impact on the manufacture of the battery housing 2 or the traction battery 3. Such steps can be directly incorporated into the procedure for manufacturing the battery housing 2 described here in order to produce the traction battery 3.

[0305] In the described procedures, the sequence of the individual steps can in principle be chosen arbitrarily, whereby the sequence of steps in the manufacture of the battery housing 2 can also be chosen arbitrarily together with the individual steps for the manufacture of the battery housing component 2.

[0306] Page 61 / 76

[0307] P81106WO

[0308] Reference symbol list

[0309] 1 Battery housing component

[0310] 2 battery cases

[0311] 3 traction batteries

[0312] 4 Battery housing component

[0313] 5 Installation part

[0314] 6 battery cell holders

[0315] 7 battery cells

[0316] 8 Inside

[0317] 9 first connection area

[0318] 10 Microstructure

[0319] 11 Undercut

[0320] 12 base

[0321] 13 first contact area

[0322] 14 Connecting element

[0323] 15 Interior

[0324] 16 coil system

[0325] 17 coil

[0326] 18 Outside

[0327] 19 custody mediator layer

[0328] 20 connecting flange

[0329] 21 second contact area

[0330] 22 second connection area

[0331] 23 Motor vehicle

[0332] 24 passenger cell b width bmin minimum width bmax maximum width

[0333] SA distance t height extent

Claims

Page 62 / 76 Applicant: KAUTEX TEXTRON GmbH & Co. KG Our reference number: P81106WO Patent claims 1. Battery housing component (1) for a battery housing (2) of a traction battery (3), comprising a battery housing component (4) and at least one insert (5) attached to an inner surface (8) of the battery housing component (4), wherein the battery housing component (1) has the following features: the battery housing component (4) has at least one first connection area (9) made of metal, to which the at least one insert (5) is connected with the battery housing component (4), and the at least one insert (5) has a first contact area (13) made of a thermoplastic material, to which the at least one insert (5) is attached to the at least one first connection area (9), wherein the at least one first connection area (9) has a microstructure (10) with undercuts (11) on its surface.and the first contact area (13) of the at least one installation part (5) is positively connected to the at least one first connection area (9), and / or the first contact area (13) of the at least one installation part (5) is connected to the at least one first connection area (9) by means of an adhesion promoter layer (19).

2. Battery housing component (1) according to claim 1, characterized in that the battery housing component (4) is designed as a metal component, in particular as a deep-drawn metallic part or as a pressed metallic component, and Page 63 / 76 P81106WO where at least one first connection area (9) is part of the battery housing component (4), and / or the battery housing component (4) has a base body made of plastic, in particular designed as a thermoplastic molded part, and has at least one metallic insert, wherein the metallic insert is connected to the base body, and the at least one first connection area (9) is formed on the at least one metallic insert.

3. Battery housing component (1) according to one of claims 1 or 2, characterized in that the at least one installation part (5) comprises at least one battery cell holder (6), wherein in particular a plurality of battery cells (7) can be attached to or are attached to the at least one battery cell holder (6), and / or the at least one installation part (5) is designed as a battery module with at least one battery cell holder (6) and a plurality of battery cells (7) which are attached to the at least one battery cell holder (6), wherein the at least one first contact area (13) is part of the at least one battery cell holder (6).

4. Battery housing (2) for a traction battery (3) , wherein the battery housing (2) comprises two battery housing components (4) between which an interior space (15) is formed for receiving a plurality of battery cells (7) and / or at least one battery module with a plurality of battery cells (7), and at least one installation part (5) which is attached to an inner side (8) of the battery housing (2), wherein the battery housing (2) has the following features: -63- Page 64 / 76 P81106WO at least one of the battery housing components (4) has at least one first connection area (9) made of metal, at which the at least one insert (5) is connected to the at least one of the battery housing components (4), and the at least one insert (5) has a first contact area (13) made of a thermoplastic material, with which the at least one insert (5) is attached to the at least one first connection area (9), wherein the at least one first connection area (9) has a microstructure (10) with undercuts (11) on its surface, and the first contact area (13) of the at least one insert (5) is positively connected to the at least one first connection area (9), and / or the first contact area (13) of the at least one insert (5) is connected to the at least one first connection area (9) by means of an adhesion promoter layer (19).

5. Battery housing (2) according to the preceding claim 4, characterized in that at least one of the battery housing components (4) is designed as a metal component, in particular as a deep-drawn metal part or as a pressed metal component, and the at least one first connection area (9) is part of the at least one of the battery housing components (4), and / or the at least one of the battery housing components (4) has a base body made of plastic, in particular designed as a thermoplastic molded part, and at least one metallic insert, wherein the metallic insert is connected to the base body, and the at least one first connection area Page 65 / 76 P81106WO (9) in which at least one metallic inlay is formed.

6. Battery housing (2) according to one of claims 4 or 5, characterized in that the at least one installation part (5) comprises at least one battery cell holder (6), wherein in particular a plurality of battery cells (7) can be attached to or are attached to the at least one battery cell holder (6), and / or the at least one installation part (5) is designed as a battery module with at least one battery cell holder (6) and a plurality of battery cells (7) which are attached to the at least one battery cell holder (6), wherein the at least one first contact area (13) is part of the at least one battery cell holder (6).

7. Battery housing (2) according to one of claims 4 to 6, characterized in that the at least one installation part (5) has a second contact area (21) made of thermoplastic material, with which the at least one installation part (5) is attached to the corresponding other battery housing part (4), wherein the corresponding other battery housing part (4) has at least one second connection area (22) made of metal, to which the at least one installation part (5) is connected, wherein the at least one second connection area (22) has a microstructure (10) with undercuts (11) on its surface, and the second contact area (21) of the at least one installation part (5) is positively connected to the at least one second connection area (22), and / or -65- Page 66 / 76 P81106WO the second contact area (21) of the at least one installation part (5) is connected to the at least one second connection area (22) by means of an adhesion promoter layer (19).

8. Traction battery (3) for a motor vehicle (23) comprising a plurality of battery cells (7) and / or at least one battery module with a plurality of battery cells (7) and a battery housing (2) according to any one of claims 4 to 7, wherein the plurality of battery cells (7) and / or the at least one battery module with the plurality of battery cells (7) is / are accommodated in the interior (15) of the battery housing (2).

9. Motor vehicle (23), in particular an electric motor vehicle with a traction battery (3) according to claim 8, wherein the traction battery (3) is arranged in particular below a passenger cell (24) of the motor vehicle (23), and wherein preferably one of the battery housing components (4) forms a floor of the passenger cell (24).

10. Method for manufacturing a battery housing component (1) according to one of claims 1 to 3, comprising a battery housing component (4) with at least one first connection area (9) made of metal and with at least one installation part (5) with a first contact area (13) made of a thermoplastic material, which is attached to an inner side (8) of the battery housing component (4), comprising the following method steps: Processing the at least one first connection area (9) to form a microstructure (10) with undercuts (11) on its surface, and / or applying an adhesion promoter layer (19) to the at least one first connection area (9) and / or -66- Page 67 / 76 P81106WO the first contact area (13) of the at least one built-in part (5) , Positioning the at least one installation part (5) with the first contact area (13) on the at least one first connection area (9) , Inductive heating of the at least one first connection area (9) to melt the first contact area (13) of the at least one built-in part (5), and Joining the at least one installation part (5) with its first contact area (13) to the at least one first connection area (9) by applying a joining pressure to form a positive connection of the first contact area (13) of the at least one installation part (5) with the at least one first connection area (9) and / or to connect the first contact area (13) of the at least one installation part (5) by means of the adhesion promoter layer (19) with the at least one first connection area (9) .

11. Method according to claim 10, characterized in that the processing of the at least one first connection area (9) to form a microstructure (10) with undercuts (11) on its surface comprises processing the surface of the at least one first connection area (9) by means of laser, etching and / or electrical erosion.

12. Method according to one of claims 10 or 11, characterized in that the method comprises a step for producing the at least one installation part (5) with a compensating material structure, in particular in the form of compensating ribs or compensating points, in its first contact area (13), and Page 68 / 76 P81106WO joining the at least one installation part (5) with its first contact area (13) to the at least one first connection area (9) by applying an joining pressure to form a connection of the first contact area (13) of the at least one installation part (5) with the at least one first connection area (9) and / or to connect the first contact area (13) of the at least one installation part (5) by means of the adhesion promoter layer (19) with the at least one first connection area (9) comprises at least partial melting of the compensating material structure and compensating for height tolerances of the at least one installation part (5) to the battery housing part (4).

13. Method for manufacturing a battery housing component (1) comprising a battery housing component (4) and at least one installation part (5) attached to an inner side (8) of the battery housing component (4), comprising the following method steps: Providing the battery housing component (4) with at least one first connection area (9) which has an inductively heatable material layer and a connection layer made of a thermoplastic material on the inside, providing the at least one installation component (5) with a first contact area (13) made of a thermoplastic material, positioning the at least one installation component (5) with the first contact area (13) on the connection layer of the at least one first connection area ( ), inductively heating the inductively heatable material layer in the at least one first connection area (9) to transfer the connection layer of the Page 69 / 76 P81106WO at least one first connection area (9) and of the first contact area (13) of the at least one built-in part (5) in molten metal, and Materially conclusive connection of the at least one built-in part (5) with its first contact area (13) with the connecting layer of the at least one first connecting area (9) .

14. Method according to claim 13, characterized in that the provision of the battery housing component (4) with at least one first connection area (9) comprising an inductively heatable material layer and a connection layer made of a thermoplastic material on the inside, comprises one of the following steps: Providing the battery housing component (4) with a particularly continuous inductively heatable material layer, wherein in the at least one first connection area (9) the connection layer is applied to the inside of the inductively heatable material layer, and / or Providing the battery housing component (4) with a particularly continuous thermoplastic layer made of the thermoplastic material, wherein in the at least one first connection area (9) the inductively heatable material layer is applied to the outside of the thermoplastic layer, and / or providing the battery housing component (4) with a particularly continuous thermoplastic layer made of the thermoplastic material, wherein in the at least one first Page 70 / 76 P81106WO Connection area (9) the inductively heatable material layer is embedded in the thermoplastic layer.

15. Method according to one of claims 13 or 14, characterized in that the provision of the battery housing component (4) with at least one first connection area (9) comprising an inductively heatable material layer and a connection layer made of a thermoplastic material on the inside, comprises one of the following steps: providing the inductively heatable material layer as a metal sheet, and / or providing the inductively heatable material layer as a wire mesh, in particular as a wire net.

16. Method according to one of claims 10 to 15, characterized in that the method comprises a step for providing the at least one installation part (5) with at least one battery cell holder (6), wherein in particular a plurality of battery cells (7) are attached to the at least one battery cell holder (6), and / or the method comprises a step for providing the at least one installation part (5) as a battery module with at least one battery cell holder (6) and a plurality of battery cells (7) which are attached to the at least one battery cell holder (6), wherein the at least one first contact area (13) is part of the at least one battery cell holder (6). -70- Page 71 / 76 P81106WO 17. Method for manufacturing a battery housing (2) according to any one of claims 4 to 7, wherein the battery housing (2) comprises two battery housing components (4) between which an interior space (15) for receiving a plurality of battery cells (7) and / or at least one battery module with a plurality of battery cells (7) is formed, and at least one installation part (5) which is attached to an inner side (8) of the battery housing (2), comprising the following method steps: Manufacturing a battery housing component (1) according to any one of claims 10 to 16, wherein at least one of the components (5) has a second contact area (21) made of a thermoplastic material, providing a battery housing component (4) with at least one second connection area (22) made of metal, machining the at least one second connection area (22) to form a microstructure (10) with undercuts (11) on its surface, or applying an adhesion promoter layer (19) to the at least one second connection area (22) and / or the second contact area (21) of the at least one component (5), positioning the battery housing component (4) relative to the battery housing component (1) such that the at least one of the components (5) is positioned with its second contact area (21) on the at least one second connection area (22),Inductive heating of the at least one second connection area (22) to melt the second contact area (21) of the at least one of the installation parts (5), and, Joining at least one of the installation parts (5) with its second contact area (21) to the at least - 71 - Page 72 / 76 P81106WO a second connection area (22) by applying a joining pressure to create a positive connection of the second contact area (21) of the at least one of the installation parts (5) to the at least one second connection area (22) or to connect the second contact area (21) of the at least one of the installation parts (5) to the at least one second connection area (22) with the adhesion promoter layer (19) .

18. Method for manufacturing a battery housing (2) according to any one of claims 4 to 7, wherein the battery housing (2) comprises two battery housing components (4) between which an interior space (15) for receiving a plurality of battery cells (7) and / or at least one battery module with a plurality of battery cells (7) is formed, and at least one installation part (5) which is attached to an inner side (8) of the battery housing (2), comprising the following method steps: Manufacturing two battery housing components (1) by the method according to any one of claims 10 to 16, wherein at least one of the installation parts (5) of at least one of the two battery housing components (1) has a second contact area (21) made of a thermoplastic material, and wherein at least one of the battery housing components (4) of the two battery housing components (1) has at least one second connection area (22) made of metal, machining the at least one second connection area (22) of the at least one battery housing component (1) to form a microstructure (10) with undercuts (11) on its surface, or applying an adhesion promoter layer (19) to the at least one second connection area (22) - 72 - Page 73 / 76 P81106WO and / or the second contact area (21) of at least one of the installation parts (5) , Positioning the two battery housing components (1) relative to each other, such that at least one of the components (5) is positioned with its second contact area (21) on the at least one second connection area (22), Inductive heating of the at least one second connection area (22) to melt the second contact area (21) of the at least one of the components (5), and Joining the at least one of the installation parts (5) with its second contact area (21) to the at least one second connection area (22) by applying a joining pressure to create a positive connection of the second contact area (21) of the at least one of the installation parts (5) to the at least one second connection area (22) or to connect the second contact area (21) of the at least one of the installation parts (5) to the at least one second connection area (22) with the adhesion promoter layer (19) .

19. Method for manufacturing a battery housing (2) , wherein the battery housing (2) comprises two battery housing components (4) , between which an interior space (15) for receiving a plurality of battery cells (7) and / or at least one battery module with a plurality of battery cells (7) is formed, and at least one installation part (5) which is attached to an inner side (8) of the battery housing (2), comprising the following method steps: Manufacturing a battery housing component (1) by the method according to any one of claims 10 to 16, wherein -73- Page 74 / 76 P81106WO at least one of the installation parts (5) has a second contact area (21) made of a thermoplastic material, Providing a battery housing component (4) with at least one second connection area (9) having an inductively heatable material layer and a connection layer made of a thermoplastic material on the inside; positioning the battery housing component (4) relative to the battery housing component (1) such that the at least one of the installation parts (5) is positioned with its second contact area (21) on the connection layer of the at least one second connection area (9); inductively heating the inductively heatable material layer in the at least one second connection area (9) to melt the connection layer of the at least one second connection area (9) and the second contact area (13) of the at least one of the installation parts (5); and Materially coherent connection of at least one of the installation parts (5) with its second contact area (13) with the connecting layer of the at least one second connecting area (9) .

20. Method for manufacturing a battery housing (2), wherein the battery housing (2) comprises two battery housing components (4), between which an interior space (15) for receiving a plurality of battery cells (7) and / or at least one battery module with a plurality of battery cells (7) is formed, and at least one installation part (5) which is attached to an inner side (8) of the battery housing (2), comprising the following method steps: manufacturing two battery housing components (1) using the method according to any one of claims 13 to 16, wherein -74- Page 75 / 76 P81106WO at least one of the installation parts (5) of at least one of the two battery housing components (1) has a second contact area (21) made of a thermoplastic material, and wherein at least one of the battery housing components (4) of the two battery housing components (1) has at least a second connection area (22) which has an inductively heatable material layer and a connection layer made of a thermoplastic material on the inside, Positioning the two battery housing components (1) relative to each other, such that at least one of the components (5) is positioned with its second contact area (21) on the connection layer of the at least one second connection area (9), Inductive heating of the inductively heatable material layer in the at least one second connection area (9) to melt the connection layer of the at least one second connection area (9) and the second contact area (13) of the at least one of the components (5), and Materially coherent connection of at least one of the installation parts (5) with its second contact area (13) with the connecting layer of the at least one second connecting area (9) . -75-

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