Battery housing component for a battery housing of a traction battery, battery housing for receiving a plurality of battery cells and / or at least one battery module having a plurality of battery cells, method for producing such a battery housing component

Abstract

The present invention discloses a battery housing component (2) for a battery housing (1) of a traction battery, wherein the battery housing component (2) has a main body (5) made of a thermoplastic material with a substantially planar base region (6) and is designed to receive and / or support battery cells, wherein the battery housing component (2) has the following features: - the battery housing component (2) has a plurality of battery cell holders (7) for receiving and / or supporting a plurality of battery cells; - the plurality of battery cell holders (7) are arranged on an inner face (8) of the base region (6); - the battery cell holders (7) are integrally bonded to the inner face (8) of the base region (6); and - the battery cell holders (7) have a common orientation on the inner face (8) of the base region (6) in order to form at least one common receptacle and / or in order to jointly support the plurality of battery cells. The present invention further discloses a battery housing component (2) for such a battery housing (1), and to a method and a device for producing same. The present invention also discloses a battery housing (1), a traction battery for a motor vehicle, a motor vehicle having a traction battery, and a battery housing component (2) produced by means of the method.

Description

[0001] Page 1 of 67

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

[0003] Our reference number: P81091DE

[0004] November 29, 2024

[0005] Battery housing component for a traction battery housing, battery housing for accommodating a plurality of battery cells and / or at least one battery module with a plurality of battery cells, traction battery, motor vehicle with a traction battery, method for manufacturing a battery housing component, battery housing component manufactured by the method and apparatus for manufacturing a battery housing component

[0006] The present invention relates to a battery housing component for a traction battery housing and to a method and apparatus for its manufacture. Furthermore, the present invention relates to a battery housing for receiving battery cells and / or at least one battery module with a plurality of battery cells, a traction battery for a motor vehicle, a motor vehicle with a traction battery, and a battery housing component manufactured by the method.

[0007] Battery housing components, as well as battery housings for traction batteries, are subject to stringent requirements regarding their mechanical stability and fire resistance. Battery housing components, particularly when installed in the base of a traction battery housing, typically also serve to protect against external mechanical impacts, such as those caused by driving over and colliding with an obstacle (page 2 / 67).

[0008] P81091DE occurs with the battery housing component. A thermally and mechanically resistant battery housing is of great importance to ensure the safety of the traction battery.

[0009] Battery housing components made of plastic, especially those made of fiber-reinforced plastics, exhibit excellent mechanical stability and good thermal insulation. In addition, they offer superior electrical insulation of the battery cells from the environment compared to metal housings, and are also lightweight. Overall, plastic battery housing components offer significant advantages, leading to their increasing use in modern traction batteries. However, battery housing components made of sheet metal, such as aluminum or steel, are still commonly used.

[0010] The trend in battery designs towards cell-to-pack (C2P) architectures presents new challenges for battery housing development. In this approach, battery cells are arranged within the battery housing without first connecting them to form battery modules. This necessitates directly integrating the battery cells into the housing, ensuring they are correctly positioned and fixed in the desired location. Typically, the battery cells are bonded to the battery housing. To optimize the structural load on the bond and reduce costs for adhesive material and reapplication, a defined adhesive gap between the cell and the housing must be maintained. Particularly with locally bonded pocket cells, prismatic cells, and blade cells, tight tolerances exist regarding the adhesive gap. Page 3 / 67

[0011] P81091DE

[0012] Additionally, there are concepts where the battery cells of a traction battery are cooled within the battery housing by means of a common cooling plate, for example, from above. Heat transfer between the cooling plate and the battery cells, as well as the connection of the cooling plate to the battery cells, is achieved using thermal interface material (TIM), which also requires precise positioning of the battery cells, particularly precise positioning of the battery cells relative to each other.

[0013] Maintaining required tolerances is made more difficult by the fact that traction batteries are commonly mounted in the vehicle floor area, particularly beneath the passenger compartment. This results in flat traction batteries and, consequently, battery housings with a low profile relative to their horizontal expansion. Consequently, the flat areas of the battery housing, such as the floor, present a challenge due to component distortion. Multi-part battery housings with several components are often connected by a flange. However, a rigid flange can cause the flat areas to bulge inwards, making it even more difficult to achieve the flatness tolerance required for bonding the battery cells.This applies in principle to battery housings in various currently relevant technologies, which are manufactured using aluminium die casting, aluminium welded constructions, steel welded constructions or from plastic in thermoplastic manufacturing processes such as pressing or injection molding.

[0014] In summary, the tight tolerances for mounting and / or supporting the battery cells in the battery housing cannot be met with the available battery housing components, or only with considerable effort. Page 4 / 67

[0015] P81091DE

[0016] The same principle applies if the battery cells are used in the form of multiple battery modules, each containing several battery cells. Here, too, there are tight tolerances for mounting and / or supporting the battery modules with the battery cells in the battery housing, which cannot be met with the available battery housing components, or only with considerable effort. This problem does not arise within the battery modules themselves.

[0017] The invention is based on the objective of providing an improved battery housing component for a battery housing, a battery housing for receiving battery cells and / or at least one battery module with a plurality of battery cells with such a battery housing component, a traction battery with such a battery housing, a motor vehicle with such a traction battery, a method and an apparatus for manufacturing such a battery housing component, and a battery housing component manufactured by the method, which overcome at least some of the aforementioned disadvantages.In detail, the invention is based on the objective of providing an improved battery housing component for a battery housing, a battery housing for receiving battery cells and / or at least one battery module with a plurality of battery cells with such a battery housing component, a traction battery with such a battery housing, a motor vehicle with such a traction battery, a method and an apparatus for manufacturing such a battery housing component, as well as a battery housing component manufactured by the method, in order to be able to mount battery cells with high accuracy and to provide a battery housing component as well as a battery housing and a traction battery with improved structural properties, in particular with increased stability. Page 5 / 67.

[0018] P81091DE

[0019] 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.

[0020] In more detail, the problem underlying the present invention is solved by a battery housing component for a battery housing of a traction battery, the battery housing component having a base body made of a thermoplastic material with a substantially flat bottom area and designed to receive and / or support battery cells, wherein the battery housing component has the following features: the battery housing component has a plurality of battery cell holders for receiving and / or supporting a plurality of battery cells, the plurality of battery cell holders are arranged on an inner side of the bottom area, the battery cell holders are materially connected to the inner side of the bottom area, and the battery cell holders have a common orientation on the inner side of the bottom area to form at least one common receptacle and / or to provide common support for the plurality of battery cells.

[0021] The appropriately designed battery housing component offers several advantages over the state of the art.

[0022] Thus, the materially bonded connection of the battery cell holders to the base body provides an interface for the common mounting and / or common support of a plurality of battery cells, with the common alignment of the battery cell holders on the inside of page 6 / 67

[0023] P81091DE

[0024] The bottom area allows for the simultaneous adjustment of unevenness in the interface to the battery cells and surrounding areas, and the joint mounting and / or joint support of the battery cells with low tolerances.

[0025] The material-fit connection of the battery cell holders to the base body of the battery housing component can be made after the base body has been shaped, thus simplifying the production of the battery housing component, for example, using known forming processes. Furthermore, the battery cell holders can be positioned and attached to the base body in a desired manner. Positioning the battery cell holders after the base body of the battery housing component has been shaped allows for reliable compensation of tolerances that may occur during the manufacturing process. This enables precise positioning of the battery cell holders, which in turn allows for precise positioning of the battery cells with low tolerances. This facilitates, or even enables, the use of battery designs with cell-to-pack (C2P) architectures.Furthermore, due to the positioning of the battery cells with their low tolerances, joint contacting of the battery cells, for example for cooling with a cooling plate, can be carried out easily and reliably.

[0026] Furthermore, the battery cell holders can contribute to the formation of a battery housing component with increased stability and improve its overall stiffness. This improves the mounting and / or joint support of the battery cells with low tolerances or deviations and improves the protection of the battery cells in the event of an accident or generally when external forces act on the battery housing or battery housing component, including, for example, torsional forces. Page 7 / 67

[0027] P81091DE forces. The material-fit connection of the battery cell holders to the base area reinforces the overall body of the battery housing component.

[0028] The battery cell holders can also be reliably and permanently fixed to the base body of the battery housing component by means of a material-fit connection, without compromising the integrity of the battery housing component. This ensures reliable protection of the traction battery's interior from the environment.

[0029] Furthermore, by selecting suitable materials, appropriate surfaces can be provided for the material-bonded connection of the battery cell holders to the battery housing component, and also, for example, for bonding the battery cells to the battery cell holders. Suitable materials can also be used to manufacture the battery cell holders with a desired strength. The use of suitable materials can, for example, compensate for fluctuating forces that can occur in the battery cells during operation, thus minimizing changes in length.

[0030] Additional details regarding the above-mentioned and described advantages and further design options can be found in the following description of detailed examples.

[0031] The battery cell holders are preferably designed for the joint mounting and / or joint support of battery cells in the form of pocket cells, prismatic cells, or blade cells. The battery cells can be mounted individually or in groups (see page 8 / 67).

[0032] P81091DE Several battery modules, for example in groups and / or according to type, are positioned in / on the battery cell holders and supported therein to manufacture the traction battery. The common mounting and / or common support of the battery cells is independent of any sequence in the mounting and / or support of the battery cells and / or the battery modules.

[0033] Common mounting and / or common support can mean that the support and / or mounting of battery cells and / or battery modules is at least partially achieved by multiple battery cell holders. For example, the battery cells and / or battery modules can be supported laterally by spaced-apart battery cell holders. Alternatively or additionally, the common mounting and / or common support of battery cells can be such that the battery cells have at least a common orientation in the assembled state, for example, for further assembly and / or securing of the battery cells and / or for attaching further components to the battery housing component or in a battery housing formed with the battery housing component. This can, for example, enable common contacts for heat conduction.Therefore, it is also possible in principle for the battery cells and / or battery modules to be supported on a battery cell holder, either individually or in groups.

[0034] The battery housing component serves to form a battery housing for a traction battery in an electrically powered vehicle. For this purpose, the battery housing typically comprises one or more battery housing elements corresponding to the battery housing component, in order to together form a closed enclosure for the battery cells. (See page 9 / 67.)

[0035] P81091DE the battery housing component is a base component of the battery housing which is covered by a battery housing cover to form the battery housing.

[0036] The base body can be trough-shaped or designed like a base plate. Regardless of the further design, the base body has a substantially flat bottom area, on the inside of which the battery cell holders are arranged. The battery housing component can preferably be designed for underbody protection. In this case, the battery housing also serves as underbody protection.

[0037] The battery housing component is designed to hold and / or support battery cells. The battery cells are held and / or supported by the battery cell holders. For this purpose, the battery cell holders may have a receiving or support surface for the battery cells, on which the battery cells are held and / or supported together.

[0038] The materially bonded connection of the battery cell holders to the inside of the base area can be carried out using various methods, as will be explained further below.

[0039] The base body is made of a thermoplastic material using a thermoplastic forming process. This can involve thermoplastic manufacturing and forming processes such as compression molding or injection molding. The base body can be made, for example, of a thermoplastic material such as polypropylene (PP) or polyamide 6 (PA 6), which are known in the industry by the names given. The base body can be fiber-reinforced, with glass fibers and / or carbon fibers and / or aramid fibers being used as the fiber material. Page 10 / 67

[0040] P81091DE

[0041] Battery cell holders can be made from various materials. In particular, the materials used for the battery cell holders can be selected depending on the type of material bond, for example, to create a welded or adhesive bond with the inside of the base area. Battery cell holders can also consist of a combination of different materials and, for example, have a layered structure, with a bonding area or layer facing the base area consisting of a first material for material bonding with the base area and one or more further areas or layers to form a bearing or support surface for the battery cells.

[0042] For example, the battery cell holders can have a steel profile or be designed as a steel profile coated on one side with an adhesive to create a material-bonded connection to the base. The steel profile can be, for example, a U-profile or a Z-profile. Alternatively or additionally, the battery cell holders can be designed as so-called cross-plies or have a cross-ply layer. Cross-plies are fiber-reinforced plastics, for example, glass fiber-reinforced polypropylene (GFPP), which preferably have a structure with multiple fiber layers embedded in a plastic material. Such cross-plies are well-suited for welding and exhibit high stability.

[0043] It is important that the battery cell holders are well suited for creating a material-fit connection with the inside of the base area. This can be achieved, for example, by the battery cell holders having a preferably flat contact surface or connection surface for bonding with the inside of the base area. On the other hand, see page 11 / 67

[0044] P81091DE It is important to ensure reliable mounting and / or support of the battery cells with the battery cell holders. This can be achieved, for example, by the battery cell holders having a preferably flat contact or support surface for the battery cells.

[0045] The battery cell holders can be solid, for example, manufactured entirely from plastic using an injection molding process. Alternatively, the battery cell holders can be hollow bodies with an internal structure featuring reinforcing ribs and / or honeycomb reinforcement, or at least have an area that is hollow with an internal structure featuring reinforcing ribs and / or honeycomb reinforcement.

[0046] Further details can be found in the following explanations of detailed examples.

[0047] Preferably, the battery housing component is designed such that the majority of battery cell holders are designed as profiles and have a flat contact surface on one side opposite the inside of the bottom area for the common reception and / or common support of the majority of battery cells, wherein the majority of battery cell holders are preferably designed as profiled sheets.

[0048] The battery cell holders can therefore be manufactured, for example, using an injection molding process. Alternatively, the battery cell holders can be manufactured using an extrusion process, whereby the extruded material is cut to the desired length to provide the battery cell holders. Preferably, the battery cell holders are profiled sheets with a preferably flat contact surface or page 12 / 67

[0049] P81091DE

[0050] The connecting surface is designed for a material-fit connection with the inside of the base area. Alternatively or additionally, the battery cell holders are designed as profiled sheets with a preferably flat contact or support surface for the battery cells. Particularly preferably, the battery cell holders have a cross-section with a preferably flat contact surface or connecting surface for a material-fit connection with the inside of the base area and a preferably flat support or support surface for the battery cells. More preferably, the battery cell holders have a rectangular cross-section.

[0051] Preferably, the battery housing component is designed such that the battery housing component has support struts for supporting the battery cell holders on the inside of the bottom area, wherein the support struts are integral with the battery cell holders, and / or the support struts are integral with the bottom area.

[0052] The support struts improve the positioning of the battery cell holders on the inside of the floor area. Furthermore, with minimal additional weight, the support struts improve the rigidity of the floor area. In addition, the support struts provide a certain degree of deformation clearance, allowing the base body and floor area to deform slightly upon impact, preventing the battery cells from sitting directly "on the floor." This is particularly relevant when the battery housing component is used on the vehicle's underbody.

[0053] If the support struts are integral with the battery cell holders, these may have a main body, and the support struts extend laterally from it. The main body (page 13 / 67)

[0054] P81091DE preferably has a contact surface for a material-fit connection with the inside of the base area, as well as a support surface for receiving and / or supporting the majority of battery cells, and the support struts extend laterally from the main body. This allows the battery cell holders to stiffen a larger portion of the base area compared to the main body while using minimal material. In particular, the support struts can be integrally formed with the main body, for example, by manufacturing the battery cell holders with the main body and support struts in a single injection molding process. Preferably, the support struts, like the main body, are material-fitted to the inside of the base area.If the support struts are integral to the base area on its inner side, the battery cell holders can, for example, be positioned with one or more side surfaces in contact with the support struts during installation and be hermetically bonded to the inner side of the base area in this position. Preferably, the battery cell holders are additionally hermetically bonded to the support struts with their side surface(s).

[0055] The preceding and subsequent descriptions regarding the design of the battery cell holders apply accordingly to the main body of the battery cell holders if they are designed with a main body and additional support struts. For example, if a multi-section design of the battery cell holders is proposed, this applies to the design of the main body. The design of the support struts is, in principle, independent of this.

[0056] Preferably, the battery housing component is designed such that page 14 / 67

[0057] P81091DE the majority of battery cell holders are designed as stiffening elements for stiffening the battery housing component in the bottom area, wherein the majority of battery cell holders are made of a uniform material as stiffening elements for stiffening the battery housing component in the bottom area, and / or the majority of battery cell holders have at least one connection area facing the bottom area made of a first material for a material-fit connection with the bottom area and a stiffening area made of a second material for stiffening the battery housing component in the bottom area.

[0058] It is important that the battery cell holders are suitable for a material-bonded connection to the base area, for example, by being weldable either entirely or in the connection area. The battery cell holders can therefore be manufactured from a single material using an injection molding process, with the battery cell holders acting as stiffening elements to provide overall rigidity for the main body of the battery housing component, particularly in the base area. The battery cell holders can, for example, be designed as so-called cross-plies. Cross-plies 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. Such cross-plies are well-suited for welding.Alternatively, the battery cell holders can, for example, have a stiffening area with a steel profile, which is fitted on one side with an adhesive to create a material-fit connection with the base. The steel profile can be, for example, a U-profile or a Z-profile. Page 15 / 67.

[0059] P81091DE

[0060] Preferably, the battery housing component is designed such that the majority of battery cell holders are designed as heat-conducting elements for conducting heat from battery cells held therein and / or supported thereon, wherein the majority of battery cell holders are made of a uniform material as heat-conducting elements for conducting heat for battery cells held therein and / or supported thereon, and / or the majority of battery cell holders have at least one connection area facing the bottom area made of a first material for a material-fit connection with the bottom area and a heat-conducting area facing away from the bottom area made of a third material for conducting heat for battery cells held therein and / or supported thereon, wherein preferably the heat-conducting area is designed with a contact surface for thermal contacting the battery cells held therein and / or supported thereon.

[0061] Heat conduction, in principle, refers to heat transfer in both directions, i.e., for cooling and / or heating the battery cells. It is important that the battery cell holders are suitable for a material-fit connection with the base area, for example, by being weldable in their entirety or at least in the connection area, and that the battery cell holders, in their entirety or at least in the heat-conducting area, allow good heat conduction with the battery cells. The battery cell holders can, for example, be manufactured from a single material using an injection molding process, with the battery cell holders themselves acting as heat-conducting elements. The design of the battery cell holders with the heat-conducting area is described on page 16 / 67.

[0062] P81091DE The third material for heat conduction for battery cells contained therein and / or supported thereon can, for example, be designed as a metal sheet or metal profile, in particular made of aluminum or steel. Preferably, the surface of the metal sheet or metal profile is designed as a contact surface for thermal contact with the contained and / or supported battery cells. Particularly preferably, the contact surface also serves as a support surface for the battery cells.

[0063] Generally, a mounting surface for battery cells must be suitable for reliably receiving and / or supporting the battery cells. Typically, the battery cells are bonded to the battery cell holders. To receive and / or support the battery cells, the battery cell holders can have a suitable interface that is functionalized for optimal bonding. For example, the interface can be implemented using a metal layer or a functionalized plastic layer.

[0064] Preferably, the battery housing component is designed such that it has a plurality of battery cell holders for the common reception and / or common support of a group of battery cells, wherein the group of battery cells is in particular arranged in a row, and the plurality of battery cell holders for the common reception and / or common support of the group of battery cells have a common orientation on the inside of the bottom area to form at least one common reception and / or common support of the group of battery cells. Page 17 / 67

[0065] P81091DE

[0066] In this exemplary embodiment, each battery cell of the corresponding group is held and / or supported by multiple battery cell holders. To prevent positioning errors of the battery cells based on potential tolerances in the positioning of the battery cell holders, the battery cell holders of each group are aligned to jointly support the corresponding battery cells. This alignment of the battery cell holders on the inside of the base area allows the corresponding battery cells of each group to be positioned reliably and with low tolerances. Unevenness in the base area of ​​the battery housing component can be reliably compensated for. The same applies to unevenness in the battery cell holders. Even when using support ribs, unevenness on these ribs can be compensated for.As a result, the battery cells can be positioned on the battery cell holders with low tolerances thanks to their shared mounting and / or support. This ensures not only reliable mounting and / or support of the battery cells on the battery cell holders, but also, for example, good thermal contact between the battery cells and the battery cell holders.

[0067] Preferably, the battery housing component is designed such that the majority of battery cell holders are configured for the common reception and / or common support of the battery cells in several groups of battery cells, wherein the battery cell holders for the common reception and / or common support of the battery cells of each group are preferably configured for the common reception and / or common support of the battery cells of one of the groups of battery cells, and page 18 / 67

[0068] P81091DE the majority of battery cell holders for the common receiving and / or common support of the battery cells are designed and / or arranged in such a way that the battery cell holders have a common orientation on the inside of the bottom area with a common orientation of the battery cell holders for the common receiving and / or common support of the battery cells of several groups to each other, in particular for the common alignment of the groups of battery cells on a common plane .

[0069] The battery cell holders of the groups are aligned to provide common support for the corresponding battery cells. This makes it possible to compensate for tolerances of individual battery cells or groups of battery cells relative to each other. In principle, regardless of how the battery cells are held and / or supported, a common positioning of the battery cells is achieved in the held state. Accordingly, after being held and / or supported by the battery cell holders, the battery cells can be contacted together due to their common alignment, for example, to cool them using a common cooling plate, such as by contacting them from above or at the common plane. The common plane can be any plane, such as an upper plane, a middle plane, or even a lower plane.The common alignment of the battery cell holders for the joint mounting and / or joint support of battery cells from multiple groups relative to each other applies both when individual battery cells are mounted and / or supported by multiple battery cell holders and when individual battery cells are mounted and / or supported by a single battery cell holder. As a result, the groups of battery cells can be positioned relative to each other with low tolerances due to the common mounting and / or joint support. See also page 19 / 67.

[0070] P81091DE can the mounting and / or support of the battery cells of each group be done with the same battery cell holders or the same battery cell holder, or with different .

[0071] Preferably, the battery housing component is designed such that the battery cell holders are materially connected to the base area by a welded connection, or the battery cell holders are materially connected to the base area by an adhesive connection.

[0072] In a welded connection, the battery cell holders are directly connected to the inside of the base area. During the welding process, the material of the battery cell holder and / or the base body is transformed into a thermoplastic state and, through solidification after alignment on the inside of the base area, is bonded to the base area. In an adhesive connection, an adhesive layer is located between the base area of ​​the base body and each battery cell holder. Selecting a suitable adhesive and an appropriate thickness of adhesive layer also allows for the desired alignment of the battery cell holders within the base area of ​​the base body to form at least one common support for the battery cells.Various methods for producing welded joints as well as adhesive joints are known as such and therefore do not need to be discussed in detail.

[0073] Preferably, the battery housing component is designed such that the majority of battery cell holders each have a longitudinal extension for common reception (page 20 / 67).

[0074] P81091DE and / or for the common support of a plurality of battery cells, wherein the plurality of battery cell holders are arranged at least partially parallel in the direction of the longitudinal extent, and / or the plurality of battery cell holders are arranged in two different orientations in the direction of the longitudinal extent, wherein the two different orientations are preferably orthogonal to each other, and / or the plurality of battery cell holders are arranged in more than two different orientations in the direction of the longitudinal extent, and / or the plurality of battery cell holders are arranged in such a way that the battery cell holders at least partially come into contact and / or overlap each other.

[0075] The battery cell holders can be designed, for example, as struts or profiles for the common mounting and / or common support of the battery cells. The battery cells can, for example, be supported by their edge regions against the battery cell holders. The battery cell holders can be arranged in different orientations on the inside of the base area. The battery cell holders can be aligned parallel to each other in one direction or orientation, resulting in an arrangement of the battery cell holders in rows. Preferably, the base area is designed with stiffening elements arranged transversely to it. The battery cell holders can also be arranged parallel to each other in two or more orientations. Such an arrangement allows for an effective reduction of component distortion of the base body of the battery housing component, particularly in the base area.In principle, the battery cell holders can also be found on page 21 / 67.

[0076] The battery cell holders (P81091DE) can be arranged in different orientations. To improve the stability of the battery housing component, the battery cell holders can at least partially abut and / or overlap each other. Preferably, the battery cell holders are connected to each other. Furthermore, the battery cell holders can be arranged in one mounting plane. If the battery cell holders are arranged in several mounting planes, identical battery cell holders can be used, since the battery cell holders can be freely positioned in each mounting plane.

[0077] Preferably, the battery housing component is designed such that the battery cell holders are equipped with a positioning aid for positioning battery cells, wherein preferably the battery cell holders have a support surface for supporting the battery cells and the positioning aid is designed as a structural elevation and / or recess of the support surface.

[0078] The positioning aid can, for example, serve as an anti-slip device during the assembly of the battery cells in the battery housing, thus facilitating the production of the traction battery. This is particularly relevant for cell-to-pack (C2P) architectures, where the battery cells can be arranged in the battery housing without first connecting them to form battery modules. The structural protrusion and / or recess of the support surface can be a protrusion and / or recess in the range of a few millimeters or less than one millimeter.

[0079] Preferably, the battery housing component is designed such that page 22 / 67

[0080] P81091DE the majority of battery cell holders have through-openings as pressure relief openings for battery cells held in and / or supported on the battery cell holders, wherein the through-openings are preferably designed with predetermined breaking points for breakage in the event of a pressure increase.

[0081] Through-openings allow pressure relief in the base area in the event of a pressure increase, for example due to a defective battery cell, thereby improving the safety of the battery housing and the traction battery. The predetermined breaking points allow the through-openings to remain closed during normal operation and only become permeable in the event of a pressure increase. The through-openings are preferably designed as channels.

[0082] Preferably, the battery housing component is designed such that the battery cell holders are designed as cross-plies, or at least a region of the battery cell holders is designed as cross-plies, and / or the battery cell holders are designed as organosheets, or at least a region of the battery cell holders is designed as organosheets, and / or the battery cell holders are designed as metal sheets, or at least a region of the battery cell holders is designed as metal sheets, preferably as aluminum sheets or steel sheets.

[0083] The battery cell holders of the various designs each possess suitable properties for use as part of the battery housing component. For example, the cross-plies, organosheets, and metal sheets exhibit high strength and can be easily supplied in the form of profiles. Especially when using metal sheets (page 23 / 67).

[0084] P81091DE allows heat conduction to or from the battery cells to achieve a desired operating temperature. Cross-plies are fiber-reinforced plastics, for example, glass fiber-reinforced polypropylene (GFPP), which preferably have a structure with multiple fiber layers embedded in a plastic material. Such cross-plies exhibit high strength and are well-suited for welding. The same applies to organosheets. Metal sheets also exhibit high strength and particularly good thermal conductivity. However, when using metal sheets, additional measures are often necessary to create a material-bonded connection.

[0085] The problem underlying the present invention is further solved by a battery housing for receiving a plurality of battery cells and / or at least one battery module with a plurality of battery cells, wherein the battery housing comprises a battery housing component as described above.

[0086] The battery casing encloses the installed battery cells, protecting them from environmental influences, moisture and impacts.

[0087] The advantages and further design options described above regarding the battery housing component apply accordingly to the battery housing and vice versa.

[0088] The problem underlying the present invention is further solved by a traction battery for a motor vehicle, which has at least one battery cell 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 page 24 / 67

[0089] P81091DE

[0090] The majority of battery cells are contained within the battery casing.

[0091] The battery cells are securely held in the traction battery.

[0092] The advantages outlined above with regard to the battery housing component and the further design options described apply accordingly to the traction battery and vice versa.

[0093] Furthermore, the problem underlying the present invention is solved by a motor vehicle, in particular an electric motor vehicle with a traction battery described above.

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

[0095] The advantages and further design forms described above regarding the battery housing component also apply here, and vice versa.

[0096] The problem underlying the present invention is further solved by a method for manufacturing a battery housing component described above, wherein the method comprises the following process steps:

[0097] Manufacturing a base body of the battery housing component from a thermoplastic material with a substantially flat bottom area in a thermoplastic molding process, arranging a plurality of battery cell holders on an inside of the bottom area of ​​the base body of the battery housing component, and page 25 / 67

[0098] P81091DE stof f conclusive connection of the battery cell holders with the inside of the base area under common alignment of the battery cell holders on the inside of the base area to form at least one common receptacle and / or to jointly support the majority of battery cells .

[0099] The details and advantages outlined above regarding the battery housing component apply accordingly to the process for manufacturing the battery housing component, and vice versa.

[0100] In particular, the method can be easily implemented to provide an interface for the common mounting and / or common support of multiple battery cells by means of the materially bonded connection of the battery cell holders to the base body of the battery housing component. Unevenness in the base area can be compensated for by aligning the battery cell holders together on the inside of the base area, which also compensates for unevenness in the interface to the battery cells, enabling the common mounting and / or common support of the battery cells with low tolerances.

[0101] The material-fit connection of the battery cell holders to the base body of the battery housing component is achieved after the base body has been shaped, thus simplifying the production of the battery housing component, for example, using thermoplastic forming processes known in the art (injection molding, flow molding). Additionally, the battery cell holders can be positioned and material-fitted as desired. Depending on the specific design of the process, the material-fit connection of the battery cell holders to the base body of the battery housing component can be achieved immediately after the base body has been shaped or on page 26 / 67.

[0102] P81091DE will be carried out with a time interval, as will be explained below.

[0103] The positioning of the battery cell holders after the forming of the battery housing component's base body, combined with the material-fit connection of the battery cell holders, enables reliable compensation for tolerances that can occur, for example, during the manufacturing of the battery housing component. This allows the battery cell holders to be positioned precisely, which in turn enables the precise positioning of the battery cells with tight tolerances. This facilitates, or even enables, the use of battery designs with cell-to-pack (C2P) architectures. Furthermore, the tight tolerances inherent in the positioning of the battery cells relative to each other allow for the simple connection of the battery cells, for example, for cooling with a cooling plate.

[0104] Furthermore, a battery housing component manufactured using this method exhibits improved stability and overall stiffness. This improves the mounting and / or joint support of the battery cells with low tolerances or deviations and the protection of the battery cells in the event of an accident or generally when large forces act on the battery housing or battery housing component, including, for example, torsional forces.

[0105] The battery cell holders can also be reliably and permanently fixed to the base body of the battery housing component by means of a material-fit connection, without compromising the structural integrity of the battery housing component. This ensures reliable protection of the traction battery's interior from the environment and vice versa. Page 27 / 67

[0106] P81091DE

[0107] The production of the battery housing component's base body from a thermoplastic material in a thermoplastic forming process comprises manufacturing the base body of the battery housing component using either a compression molding process or an injection molding process. Such processes are known in the prior art. These processes have in common that a thermoplastic material is first heated and then, while heated, formed into a desired shape. Upon cooling, the base body solidifies in its given shape. The base body can be made, for example, from a thermoplastic material such as polypropylene (PP) or polyamide 6 (PA 6), which are known in the art under the names mentioned. The base body can be fiber-reinforced, with glass fibers and / or carbon fibers and / or aramid fibers being used as the fiber material.

[0108] The battery cell holders can be arranged on the inside of the base of the battery housing component, either collectively or individually. Accurate arrangement of the battery cell holders is essential for their alignment on the inside of the base to form at least one common receptacle and / or to jointly support the majority of the battery cells.

[0109] The materially bonded connection of the battery cell holders to the inside of the base area, with common alignment of the battery cell holders on the inside of the base area to form at least one common receptacle and / or to jointly support the majority of battery cells, can be carried out using various methods, as further explained below. Page 28 / 67

[0110] P81091DE

[0111] Preferably, the method is designed such that the materially bonded connection of the battery cell holders to the inside of the base area, with common alignment of the battery cell holders on the inside of the base area to form at least one common receptacle and / or to jointly support the plurality of battery cells, comprises bonding the battery cell holders to the inside of the base area, and / or the materially bonded connection of the battery cell holders to the inside of the base area, with common alignment of the battery cell holders on the inside of the base area to form at least one common receptacle and / or to jointly support the plurality of battery cells, comprises welding the battery cell holders to the inside of the base area.

[0112] Bonding the battery cell holders to the inside of the base area can be carried out using conventional adhesives. The adhesive can be applied to the inside of the base area and / or to a connection point of the battery cell holder for bonding to the inside of the base body. When welding, depending on the thermoplastic material (e.g., PP or PA6) of the base body, the welding temperatures range from 180 to 300 °C, and the welding times range from 10 to 60 seconds, depending on the welding method. The welding pressure between the welding tool and the surfaces to be welded can range from 0.1 to 10 bar. Welding is particularly suitable for battery cell holders that are also made of a thermoplastic material or that have a layer of thermoplastic material in the connection point for bonding to the inside of the base body.

[0113] Preferably, the method is designed such that page 29 / 67

[0114] P81091DE includes welding the battery cell holders to the inside of the base area in a residual heat of the step to manufacture the base body of the battery housing component from the thermoplastic plastic in a thermoplastic forming process.

[0115] Residual heat refers to the heat generated in the base body of the battery housing component after the thermoplastic forming process. This residual heat reduces the amount of heat required for the welding process, making the process particularly efficient. This applies to the energy and time used to heat the thermoplastic material and, consequently, to the time and energy required to create the weld.

[0116] Preferably, the method is designed such that the welding of the battery cell holders to the inside of the base area comprises welding the battery cell holders to the inside of the base area by means of a contact heat-based welding process, for example a hot element welding or mirror welding, a vibration welding process or an ultrasonic welding process.

[0117] Welding processes based on contact heat cause local heating of relevant surfaces in the contact area through contact. Vibration welding or ultrasonic welding processes can also be used to cause local heating. In these processes, both the base area of ​​the main body and / or the battery cell holders can be heated. Preferably, the base area is heated from its outer surface, so that the battery cell holders are heated from the inner surface. (Page 30 / 67)

[0118] P81091DE

[0119] The bottom area can be fused to form a material-bonded connection. Even if the welding of the battery cell holders to the inside of the bottom area is carried out in the residual heat of the main body of the battery housing component after thermoplastic forming, additional heating is typically required to weld the battery cell holders to the inside of the bottom area.

[0120] Preferably, the method is designed such that the welding of the battery cell holders to the inside of the base area includes a partial immersion of the battery cell holders in the connection area into a melt of the base area.

[0121] Partial immersion of the battery cell holders in the melt of the base area allows for particularly good compensation of positioning tolerances. Preferably, the base area of ​​the main body is heated from the outside so that the melt forms, and the battery cell holders are partially immersed in it from the inside of the base area, thus fusing them to form a material-bonded connection.

[0122] Preferably, the method is designed such that arranging a plurality of battery cell holders on an inner surface of the base area of ​​the battery housing component comprises arranging the plurality of battery cell holders from a material with a higher melting point than the material of the base body, in particular PET or PI, or the plurality of battery cell holders each comprise a connection area made of a material with a higher melting point than the material of the base body, in particular PET or PI. Page 31 / 67

[0123] P81091DE

[0124] For example, in contact heat-based welding processes such as hot plate welding or mirror welding, a potential problem of adhesion of the thermoplastic material to be welded to the heating mirror can be avoided by ensuring that the connection area of ​​the battery cell holder to be welded to the base body does not melt or has a higher melting point than the thermoplastic material of the base body (e.g., PP or PA6). To achieve this, the battery cell holders, either entirely or at least in the connection area, can be made of a plastic with a higher melting point, such as polyethylene terephthalate (PET) or polyimide (PI), than the base body. PI material (polyimide) is a non-melting, high-temperature polymer that exhibits good temperature resistance, high mechanical strength, and dimensional stability.If only the connection area uses a plastic with a higher melting temperature, the battery cell holders can also be freely designed, for example with regard to mechanical stability and / or thermal conductivity properties.

[0125] Preferably, the method is designed such that it includes an additional step for clamping the base body of the battery housing component before the materially bonded connection of the battery cell holders to the inside of the bottom area.

[0126] Clamping the base body results in a preferably flat alignment of the bottom area, which further reduces tolerances. This is particularly true if the base body is designed with a connecting flange. Without clamping, there is a risk that flat areas, especially the bottom area, may warp inwards, for example. Page 32 / 67

[0127] P81091DE

[0128] Clamping the base body also reduces the overall component distortion caused by the heat introduced under form constraints during the welding process.

[0129] Preferably, the method is designed such that the method includes an additional step for cooling the battery housing component after welding the battery cell holders to the inside of the bottom area, in particular cooling the base body of the battery housing component in connection areas with the battery cell holders, preferably by contact cooling.

[0130] Cooling the battery housing component, i.e., the base body with the associated battery cell holders, serves to dissipate heat for the consolidation of the thermoplastic material. Analogous to hot-cell welding with one or more flat heating mirrors, cooling the battery housing component can be achieved with one or more flat cooling mirrors or cooling plates. The cooling mirrors or cooling plates provide localized cooling, which is particularly efficient in terms of energy and time. Cooling of the battery housing component is preferably carried out from an outer surface of the base body, which facilitates contact with the cooling mirror(s).

[0131] The problem underlying the present invention is further solved by a battery housing component for a traction battery housing, wherein the battery housing component has a base body made of a thermoplastic material with a substantially flat bottom region and is designed to receive and / or support battery cells, and wherein the battery housing component is manufactured using the method described above. Page 33 / 67

[0132] P81091DE

[0133] The advantages and further embodiments described above with regard to the battery housing component apply accordingly to the battery housing component produced using the above method and vice versa.

[0134] The problem underlying the present invention is further solved by a device for manufacturing a battery housing component described above, comprising: a holding device for holding the base body of the battery housing component after a thermoplastic forming process, a positioning device for arranging a plurality of battery cell holders for receiving and / or supporting a plurality of battery cells on an inner surface of a bottom region of the base body, and a welding device for materially joining the battery cell holders to the inner surface of the bottom region of the base body with common alignment of the battery cell holders on the inner surface of the bottom region to form at least one common receptacle and / or to common support of the plurality of battery cells, wherein the holding device is configured to hold the base body with the welding device during welding.and the positioning device is designed to arrange the majority of battery cell holders on the inside of a bottom area of ​​the base body during welding with the welding device.

[0135] The specified device enables the manufacture of the battery housing component with the desired properties, as specified above, in particular with the arrangement of the battery cell holders on the inside of a bottom area of ​​the base body (page 34 / 67).

[0136] P81091DE for holding and / or supporting multiple battery cells. The battery housing component can be manufactured efficiently.

[0137] The apparatus described here for manufacturing a battery housing component does not include the shaping of the base body. Corresponding apparatus for thermoplastic shaping processes is well-known and therefore does not need to be explained in detail.

[0138] The holding device is designed to receive the base body of the battery housing component after the thermoplastic forming process. The base body may already be cooled and solidified, or it may still possess residual heat from the thermoplastic forming process. In this state, the base body may not yet be completely solidified. The holding device can be designed to receive the base body of the battery housing component after the thermoplastic forming process when it has already cooled to ambient temperature. Alternatively, the holding device can be designed to receive the base body of the battery housing component after the thermoplastic forming process when it still possesses residual heat from the thermoplastic forming process. In this state, the base body may not yet be completely solidified.The residual heat relates to the heat of the base body of the battery housing component after the thermoplastic forming process.

[0139] The positioning device is designed to arrange the majority of battery cell holders on the inside of the base area of ​​the main body. The positioning device is designed for positioning relative to the main body. The positioning device as a whole can be movable relative to the main body to align the battery cell holders in their position (page 35 / 67).

[0140] P81091DE

[0141] Positioning can be done simultaneously on the inside of the base area of ​​the main body to create a material-fit connection. Alternatively, the positioning device can be designed to position the battery cell holders on the inside of the base area of ​​the main body. The arrangement of the battery cell holders to accommodate and / or support multiple battery cells on the inside of a base area of ​​the main body can therefore be done individually. Regardless of the method, the battery cell holders can be positioned simultaneously or sequentially, for example, one after the other, on the inside of the base area of ​​the main body.

[0142] The welding device performs the material-bonded joining of the battery cell holders to the inside of the base area. The welding can be carried out using various methods known in the prior art, which can be selected, for example, depending on the materials used for the base body and / or the battery cell holders. The welding device can be designed to perform the welding of the battery cell holders to the inside of the base area using the residual heat from the thermoplastic forming process used to manufacture the base body. The residual heat of the base body reduces the amount of heat required for the welding process, making the process particularly efficient in terms of energy consumption and processing time.

[0143] For example, the base body can be made from a thermoplastic material such as PP or PA6, which typically requires welding temperatures between 180-300 °C and welding times between 10-60 seconds, depending on the welding method. The welding device alone, or for example in combination with the positioning device, can apply joining pressures between the required welding parameters. (Page 36 / 67)

[0144] P81091DE The component surfaces are subjected to pressures between 0, 1 and 10 bar. The battery cell holders are preferably made of a thermoplastic material or, in the connection area for connection with the inside of the base body, are designed with a layer of thermoplastic material.

[0145] During the welding process, the base body is held by the holding device. Additionally, the battery cell holders are held in position by the positioning device during the welding process. This allows the battery cell holders to be aligned on the inside of the base area to form at least one common receptacle and / or to support the majority of the battery cells. The welding process can be performed simultaneously for all battery cell holders. Alternatively, the welding process can be performed sequentially for the battery cell holders, making it possible to weld the battery cell holders in groups simultaneously.

[0146] As a result, the device can achieve a desired arrangement of the battery cell holders on the inside of a bottom area of ​​the base body, in order to achieve the mounting and / or support of a plurality of battery cells on an inside of a bottom area of ​​the base body with low tolerances, whereby the alignment is achieved during welding with the welding device and subsequently maintained.

[0147] Preferably, the device is designed such that the welding apparatus has a plurality of heating mirrors for heating the bottom area of ​​the base body in areas for the material-fit connection of the bottom area with the battery cell holders, as shown on page 37 / 67.

[0148] P81091DE the heating mirrors are preferably designed to be movable as heating plungers for contacting the areas of the bottom area for a material-fit connection with the battery cell holders, and wherein the heating plungers are preferably pneumatically actuated for contacting the areas of the bottom area for a material-fit connection with the battery cell holders.

[0149] Welding battery cell holders with heating mirrors is a contact heat-based welding process in which contact with the heating mirrors causes local heating of relevant areas in the contact zone. Both the base area and / or the battery cell holders can be heated with the heating mirrors. Preferably, the base area is heated from its outer surface with the heating mirrors, so that the battery cell holders can be fused to it from the inner surface of the base area, creating a material-bonded connection. In principle, all battery cell holders can be welded to the base body in one step, i.e., simultaneously, or sequentially in several steps.If the welding of the battery cell holders to the inside of the base area is carried out using the residual heat of the battery housing component's base body after thermoplastic forming, the welding process can be performed with less energy input and in a shorter time. The heating mirrors can be moved together to weld the battery cell holders to the inside of the base area. Alternatively or additionally, the heating mirrors can be individually designed as heating plungers and moved accordingly. This allows the base body to be heated with particularly high precision. The heating plungers can be pneumatically controlled in a particularly simple and highly reliable manner. The pneumatic control is based on compressed air, so high temperatures are not a problem (page 38 / 67).

[0150] P81091DE and, in case of damage, a release of compressed air is also harmless. Alternatively, hydraulic control of the heating pistons is possible, for example.

[0151] Preferably, the device is designed such that it has a cooling device for cooling the base area of ​​the main body, in particular with a plurality of cooling mirrors for cooling the base area of ​​the main body in areas that are materially connected to the battery cell holders, wherein the cooling mirrors are preferably movable as cooling plungers for contacting the areas of the base area that are materially connected to the battery cell holders, and wherein the cooling plungers are preferably pneumatically actuated for contacting the areas of the base area that are materially connected to the battery cell holders.

[0152] Cooling with the cooling device takes place after welding, once the material-bonded connection between the battery cell holders and the inside of the base body has been established. Cooling the battery housing component, i.e., the base body with the attached battery cell holders, serves to dissipate heat for the consolidation of the thermoplastic material. The cooling mirrors provide local cooling, which is particularly efficient in terms of energy and time. Cooling of the battery housing component is preferably carried out from the outside of the base body, which facilitates contact with the cooling mirror(s). Cooling with cooling mirrors is a contact cooling method in which contact with the cooling mirrors results in local cooling of relevant areas in the contact zone. Preferably, the bottom area is cooled from its outside with the cooling mirror(s).

[0153] P81091DE

[0154] Cooling mirrors are used to cool the battery cell holders. In principle, all battery cell holders can be cooled simultaneously in one step, or sequentially in several steps. The cooling mirrors can be moved together. Alternatively or additionally, the cooling mirrors can be individually designed as cooling pistons and thus be movable. This allows for particularly precise cooling of the base body. The cooling pistons can be pneumatically controlled in a very simple and highly reliable manner. Pneumatic control is based on compressed air, so low temperatures are not a problem and any leakage of compressed air in case of damage is harmless. Alternatively, hydraulic control of the cooling pistons is also possible.

[0155] Preferably, the device is configured such that it includes a transport device for moving the base body of the battery housing component between the welding device and the cooling device, wherein the transport device is preferably designed for linear movement of the base body of the battery housing component between the welding device and the cooling device, or the device includes a positioning device for alternatively positioning the welding device and the cooling device on the base body of the battery housing component, wherein the positioning device is preferably designed for linear movement of the welding device and the cooling device relative to the base body of the battery housing component, and wherein, furthermore, the welding device and the cooling device are held on a linear guide and are jointly linearly movable. Page 40 / 67

[0156] P81091DE

[0157] The transport device and the positioning device can, for example, be designed with rails and / or slides to achieve linear movement. In particular, the transport device and the positioning device can change the position of the base body relative to the welding device and the cooling device, allowing separate processing of the battery housing component by the welding device and the cooling device. Furthermore, the design of the device with the transport device can create a spatial separation between the cooling device and the welding device. This allows ambient heat or cold present in the area of ​​the cooling device or the welding device to contribute to the desired heating or cooling of the welding device, the cooling device, the base body, and / or the battery cell holders, or to prevent unwanted heating or cooling.Cooling of the welding device, the cooling device, the base body and / or the battery cell holders can be reduced or prevented. Furthermore, the manufacturing of the battery housing component can be carried out efficiently.

[0158] Preferably, the device is designed such that the holding device for holding the base body of the battery housing component is designed to clamp the base body of the battery housing component, in particular to clamp the bottom area of ​​the base body.

[0159] Clamping the base body with the clamping device results in a preferably flat alignment of the bottom area, which further reduces tolerances. This is particularly true if the base body is designed with a connecting flange. Without clamping, there is a risk that flat areas, especially the bottom area, may warp, for example, according to page 41 / 67.

[0160] P81091DE The clamping of the base body also reduces the overall component distortion caused by the heat introduced under form constraint during the welding process.

[0161] Further advantages, details, and features of the invention will become apparent from the illustrated examples below. Specifically, the following will be shown:

[0162] Figure 1: a perspective partial representation of a battery housing of a traction battery according to the invention with a battery housing component in a sectional view according to a first, preferred embodiment of the present invention;

[0163] Figure 2: a schematic sectional view of the battery housing component from Fig. 1 in side view;

[0164] Figure 3: a schematic representation of the bottom area of ​​the battery housing component from Fig. 1 with a plurality of battery cell holders in three design variants;

[0165] Figure 4: a schematic representation of a device for manufacturing the battery housing component from the figures.

[0166] 1 to 3 in accordance with the first version; and

[0167] Figure 5: a flow diagram of a method for manufacturing the battery casing component from Figures 1 to 3 in accordance with the first embodiment.

[0168] In the following description, the same reference symbols denote the same components or the same features, so that a description carried out with reference to a figure regarding a construction page 42 / 67

[0169] P81091DE also applies in part to the other figures, thus avoiding repetitive descriptions. Furthermore, individual features described in connection with one version can also be applied separately to other versions.

[0170] Figure 1 shows a perspective, partial view of a battery housing 1 of a traction battery according to a first embodiment of the present invention in a sectional view.

[0171] The battery housing 1 comprises a battery housing component 2, which is designed as the base component of the battery housing 1, and a battery housing cover (not shown) which covers the battery housing component 2. A cooling plate 3 is arranged in the battery housing 1 to form the battery housing 1 with the battery housing component 2, creating a receiving space 4 for battery cells (not shown).

[0172] The battery housing component 2 comprises a base body 5 for receiving and / or supporting the battery cells. The base body 5 is made of a thermoplastic material and is designed here in the form of a base plate, whereby the thermoplastic material may be fiber-reinforced. The base body 5 comprises a substantially flat base area 6.

[0173] The battery housing component 2 comprises a plurality of battery cell holders 7 for receiving and / or supporting a plurality of battery cells. The plurality of battery cell holders 7 are arranged on an inner surface 8 of the base area 6 and are connected to the inner surface 8 of the base area 6 in a manner that is interlocking with the inner surface 8 of the base area 6.

[0174] As can be seen further in Figure 1, support struts 9 are arranged on the inside 8 of the base area, which are integral here (page 43 / 67).

[0175] P81091DE The support struts 9 extend laterally from the battery cell holders 7 and improve the support of the battery cell holders 7 on the inside 8 of the base area 6.

[0176] The battery cell holders 7 are designed for the joint reception and / or joint support of the battery cells, which are in the form of pouch cells, prismatic cells, or blade cells. Each battery cell holder 7 has a longitudinal extension for the joint reception and / or joint support of a plurality of battery cells. The arrangement of the battery cell holders 7 is such that two battery cell holders 7 jointly support a group of battery cells, which are arranged in a row. For this purpose, the battery cell holders 7 have a contact surface or support surface 13 on their upper side for the battery cells 7, on which the battery cells are jointly received and / or supported.In detail, the battery cells are each laterally supported on the support surface 13, so that a space 12 is formed between the received battery cells and the inner side 8 of the base area. A corresponding orientation of the battery cell holders 7 is shown schematically in Figure 3 as a partial view a), in which the battery cell holders 7 are arranged and aligned for the common receiving and / or common support of a series of battery cells in parallel rows, forming common receiving and / or common support of the battery cells of each row, wherein the battery cell holders 7 are arranged in one mounting plane.

[0177] An alternative arrangement of the battery cell holders 7 is shown in Figure 3 as a partial view b). As shown there, the battery cell holders 7 are orthogonal in two different orientations in the longitudinal direction. Page 44 / 67

[0178] P81091DE is arranged such that the battery cell holders 7 partially overlap and lie on top of each other, the battery cell holders 7 being arranged in two planes. The battery cell holders 7 are connected to each other in contact areas.

[0179] Another alternative arrangement of the battery cell holders 7 is shown in Figure 3 as a partial view c). As shown there, the battery cell holders 7 are arranged in more than two different orientations in the direction of their longitudinal extent, with the battery cell holders 7 partially abutting and overlapping each other.

[0180] The battery cell holders 7 are designed here as stiffening elements to stiffen the battery housing component 2 in the bottom area 6.

[0181] Furthermore, the battery cell holders 7 are designed here as heat conducting elements for the heat conduction of battery cells placed therein and / or supported on them.

[0182] The battery cell holders 7 are designed as profiles with a rectangular cross-section and have a flat contact surface or support surface 13 on one side opposite the inner side 8 of the base area 6 for the common reception and / or common support of the battery cells. Furthermore, the battery cell holders 7 have a flat contact surface or connecting surface 14 on one side facing the inner side 8 for a material-fit connection with the inner side 8 of the base area 6.

[0183] The battery cell holders 7 are solidly constructed, for example, by being manufactured from solid plastic using an injection molding or flow-forming process. The battery cell holders 7 can be designed as crossplies, as organosheets, or (see page 45 / 67).

[0184] P81091DE shall be made of metal sheets, preferably aluminum or steel. Crossplies are fiber-reinforced plastics, for example glass fiber-reinforced polypropylene (GFPP), which preferably have a structure with multiple fiber layers embedded in a plastic material. The metal sheets may be coated on one side with an adhesion promoter to create a material-bonded connection with the base area 6. The metal sheets may, for example, be designed as a U-profile or a Z-profile.

[0185] In an alternative design, the battery cell holders 7 have a structure with a combination of different materials in a layered structure.

[0186] The battery cell holders 7 have a connection area facing the base area, made of a first material, for a material-fit connection with the base area 6. For this purpose, the connection area is designed on its side opposite the inner side 8 of the base area 6 with a flat contact surface or connection surface 14 for a material-fit connection with the inner side 8 of the base area. The connection area is made of a plastic such as polyethylene terephthalate (PET) or polyimide (PI).

[0187] Furthermore, the battery cell holders 7 have a stiffening area made of a second material to stiffen the battery housing component 2 in the base area 6. The stiffening area can, for example, be designed as an organosheet or as a cross-ply.

[0188] Above this are the battery cell holders 7 with a heat conduction area facing away from the base area 6, made of a third material for heat conduction for components included therein and / or attached to it (page 46 / 67).

[0189] P81091DE is designed for supported battery cells, wherein the heat conduction area is designed with the contact surface or support surface 13. The contact surface or support surface 13 simultaneously serves as a contact surface 14 for thermal contact of the mounted and / or supported battery cells. The heat conduction area can, for example, be designed as a metal sheet or metal profile, in particular made of aluminum or steel.

[0190] The battery cell holders 7 have a common orientation on the inner side 8 of the base area 6 for the common receiving and / or common support of the group of battery cells, forming at least one common receiving and / or common support for the group of battery cells. Furthermore, the battery cell holders 7 are designed for the common receiving and / or common support of the battery cells of the groups of battery cells 7. The battery cell holders 7 also have a common orientation on the inner side 8 of the base area 6, with a common orientation of the battery cell holders 7 for the common receiving and / or common support of the battery cells of several groups relative to each other, wherein the battery cells 7 are aligned on a common plane. In Figure 2, this plane corresponds to the cooling plate 3, which makes common contact with the battery cells for cooling the battery cells.

[0191] The battery cell holders 7 are connected to the base area 6 by a welded connection.

[0192] Figure 4 schematically shows a device 15 for manufacturing a battery housing component 2 as described above. The device 15 shown does not include the shaping of the base body 5. Corresponding devices for thermoplastic shaping processes are known as such and therefore do not need to be explained in detail. Page 47 / 67

[0193] P81091DE

[0194] The device 15 comprises a holding device 16 for holding the base body 5 of the battery housing component 2 after the thermoplastic forming process. The holding device 16 is designed to receive the base body 5 of the battery housing component after the thermoplastic forming process, wherein the base body still possesses residual heat after the thermoplastic forming process and is not yet completely solidified.

[0195] The holding device 16 is designed to clamp the held base body 5 of the battery housing component 2, in particular clamping the bottom area 6 of the base body 5.

[0196] The device 15 also includes a positioning device 17 for arranging a plurality of battery cell holders 7 for receiving and / or supporting a plurality of battery cells on the inside 8 of the bottom area 6 of the base body 5. The positioning device 16 is movable overall relative to the base body in order to simultaneously position the battery cell holders 7 on the inside 8 of the bottom area 6 of the base body 5 to establish the materially interlocking connection.

[0197] The holding device 16 and the positioning device 17 are shown schematically in Figure 4.

[0198] The device 15 further comprises a welding device 18 for materially joining the battery cell holders 7 to the inner surface 8 of the base area 6 of the main body 5, with the battery cell holders 7 being aligned with the inner surface 8 of the base area 6 to form at least one common receptacle and / or to jointly support the majority of battery cells. The welding device 18 performs the materially joining of the battery cell holders 7 to the inner surface 8 of the base area 6. Page 48 / 67

[0199] P81091DE

[0200] The welding device 18 has a plurality of heating mirrors 19 for heating the base area 6 of the base body 5 in areas for a material-fit connection of the base area 6 to the battery cell holders 7. Thus, the battery cell holders 7 are welded to the inner surface 8 of the base area 6 by means of a contact heat-based welding process. The heating mirrors 19 are designed here as movable heating plungers for contacting the areas of the base area 6 for a material-fit connection with the battery cell holders 7. In this embodiment, the heating mirrors 19 are pneumatically actuated for contacting the areas of the base area 6 for a material-fit connection with the battery cell holders 7. The welding device 18 is designed to perform the welding process for all battery cell holders 7 simultaneously. The contacting of the bottom area 6 with the heating mirrors 19 is indicated in Figure 4.

[0201] The holding device 16 is designed to hold the base body 5 during welding with the welding device 18. The positioning device 17 is designed to arrange the battery cell holders 7 on the inside 8 of a bottom area 6 of the base body 5 during welding with the welding device 18.

[0202] The device is designed to perform the welding process using the welding device 18. If the base body 5 is made of a thermoplastic material such as PP or PA6, welding temperatures between 180 and 300 °C and welding times between 10 and 60 seconds are typically used. The welding device 18, alone or in conjunction with the positioning device 17, can apply joining pressures between the component surfaces to be welded of between 0, 1, and 10 bar. Page 49 / 67

[0203] P81091DE

[0204] Accordingly, the base area 6 with the heating mirrors 19 is heated from its outside, so that the battery cell holders 7 can be fused to it from the inside 7 of the base area 6 to form a material-coherent connection. In this process, the battery cell holders 7 are partially immersed in the molten material of the base area 6. In the alternative embodiment, the battery cell holders 7 with the connection area are wholly or partially immersed in the molten material of the base area 6.

[0205] The device 15 further comprises a cooling device 20 for cooling the base area 6 of the main body 5, with a plurality of cooling mirrors 21 for cooling the base area 6 of the main body 5 in areas that are materially connected to the battery cell holders 7. Similar to the heating mirrors 19, the cooling mirrors 21 are designed as cooling pistons and, as such, are movable to contact the areas of the base area 6 that are materially connected to the battery cell holders 7. The cooling mirrors 21 are also pneumatically actuated to contact the areas of the base area 6 that are materially connected to the battery cell holders 7. The cooling mirrors 21 effect local cooling. Cooling of the battery housing component 2 is carried out from an outer surface 25 of the main body 5. The cooling mirrors 21 are moved together in this process.As shown in Figure 4, the heating mirrors 19 and the cooling mirrors 21 are each positioned so that they act on the same areas of the floor area 6.

[0206] The device 15 also includes a transport device 22 for transporting the base body 5 of the battery housing component 2 between the welding device 18 and the cooling device 20. The transport device 22 is designed for the linear movement of the battery housing component 2 between the welding device 20 and the cooling device 22. For this purpose, the transport device is located on page 50 / 67.

[0207] P81091DE direction 22 here with rails 23 and a schematically represented carriage 24 implemented to realize the linear movement .

[0208] In an alternative embodiment, the device 15 has a positioning device for alternatively positioning the welding device 18 and the cooling device 20 on the base body 5 of the battery housing component 2, wherein the positioning device is preferably designed for linear movement of the welding device 18 and the cooling device 20 to the battery housing component 2, and wherein, in particular, the welding device 18 and the cooling device 20 are held on a linear guide and are jointly linearly movable.

[0209] The following describes a method for manufacturing the battery housing component 2 using the device 15 with reference to Figure 5.

[0210] The process begins with a step S 100 to produce the base body 5 of the battery housing component 2 from a thermoplastic plastic with a substantially flat bottom area 6 in a thermoplastic forming process.

[0211] The production of the battery housing component's base body 5 from the thermoplastic material in the thermoplastic forming process comprises manufacturing the base body 5 of the battery housing component 2 using either a compression molding or injection molding process. Both processes involve first heating a thermoplastic material and then shaping it in the heated state. Upon cooling, the base body 5 solidifies in its given shape. Here, the base body 5 is made, for example, of a thermoplastic material such as polypropylene (PP) or polyamide 6 (PA 6). (Page 51 / 67)

[0212] P81091DE manufactured. Afterwards, the base body 5 is taken over and held by the holding device 16.

[0213] Step S 110 concerns the arrangement of a plurality of battery cell holders 7 on the inside 8 of the bottom area 6 of the base body 5 of the battery housing component 2 .

[0214] The positioning of the battery cell holders 7 on the inner surface 8 of the base area 6 of the main body 5 of the battery housing component 2 is carried out using the positioning device 17. This positioning is performed for all battery cell holders 7 simultaneously. The battery cell holders 7 are made of a material with a higher melting point than the material of the main body 5, in particular PET or PI. If the battery cell holder 7 has multiple areas with a connection area for joining to the inner surface 8 of the base area 6, this applies accordingly to the connection area.

[0215] Step S 120 concerns clamping the base body 5 of the battery housing component 2 .

[0216] The clamping of the base body 5 can also be carried out before the battery cell holders 7 are arranged on the inside 8 of the base area 6.

[0217] The base body 5 is clamped with the holding device 16.

[0218] Step S 130 concerns a materially interlocking connection of the battery cell holders 7 to the inner surface 8 of the base area 6, with common alignment of the battery cell holders 7 on the inner surface 8 of the base area 6 to form at least one common receptacle and / or to jointly support the majority of battery cells. Page 52 / 67

[0219] P81091DE

[0220] The materially bonded connection of the battery cell holders 7 to the base body 5 of the battery housing component 2 is carried out here as a welding process after the forming of the base body 5 in a residual heat from the step of manufacturing the base body 5 of the battery housing component 2 from the thermoplastic material in the thermoplastic forming process. Residual heat refers to heat of the base body 5 of the battery housing component 2 after the thermoplastic forming process.

[0221] The mechanically sound connection of the battery cell holders 7 with the inside 8 of the base area 6 is carried out by aligning the battery cell holders 7 with the inside 8 of the base area 6 to form at least one common receptacle and / or to support the majority of battery cells.

[0222] As already explained with regard to welding device 18, depending on the thermoplastic material (e.g., PP or PA6) of the base body, five welding temperatures between 180 and 300 °C are used during welding, with welding times between 10 and 60 seconds required depending on the welding method. The joining pressures between the welding tool and the surfaces of the component to be welded can, for example, range between 0, 1, and 10 bar.

[0223] During welding with the welding device 18, the bottom area 6 of the base body 5 is heated by the heating mirrors 19 in areas for the material-bonded connection of the bottom area 6 to the battery cell holders 7, whereby the heating mirrors 19 contact the bottom area 6 of the base body 5 and the material of the bottom area 6 of the base body 5 locally melts. During welding, the battery cell holders 7 are partially immersed in the molten bottom area 6, as described in detail above with reference to the welding device 18. Page 53 / 67

[0224] P81091DE

[0225] Step S 140 concerns cooling the battery housing component 2 after welding the battery cell holders 7 to the inside 8 of the bottom area 6, whereby the base body 5 of the battery housing component 2 is cooled in connection areas with the battery cell holders 7 by contact cooling.

[0226] In analogy to welding with the heating mirrors 19, the battery housing component 2 is contacted and cooled with the flat cooling mirrors 21 on the outside 25 of the base body 5.

[0227] Page 54 / 67

[0228] P81091DE

[0229] Reference symbol list

[0230] 1 battery case

[0231] 2 Battery housing component

[0232] 3 cooling plates

[0233] 4 Recording room

[0234] 5 basic shapes

[0235] 6 Floor area

[0236] 7 battery cell holders

[0237] 8 Inside

[0238] 9 support strut

[0239] 12 Free space

[0240] 13. Support surface or bearing surface

[0241] 14 Contact surface or connecting surface

[0242] 15. Setup

[0243] 16 Holding device

[0244] 17 Positioning device

[0245] 18 Welding device

[0246] 19 heating mirrors

[0247] 20 Cooling device

[0248] 21 cooling mirrors

[0249] 22 Transport device

[0250] 23 rail

[0251] 24 sleds

[0252] 25 Outside

Claims

Page 55 / 67 Applicant: KAUTEX TEXTRON GmbH & Co. KG Our reference number: P81091DE Patent claims 1. Battery housing component (2) for a battery housing (1) of a traction battery, wherein the battery housing component (2) has a base body (5) made of a thermoplastic material with a substantially flat bottom area (6) and is designed to receive and / or support battery cells, wherein the battery housing component (2) has the following features: the battery housing component (2) has a plurality of battery cell holders (7) for receiving and / or supporting a plurality of battery cells, the plurality of battery cell holders (7) are arranged on an inner surface (8) of the bottom area (6), the battery cell holders (7) are materially bonded to the inner surface (8) of the bottom area (6), and the battery cell holders (7) have a common orientation on the inner surface (8) of the bottom area (6) to form at least one common receptacle and / or to provide common support for the plurality of battery cells.

2. Battery housing component (2) according to claim 1, characterized in that the plurality of battery cell holders (7) are designed as profiles and have a flat support surface (13) on one side opposite the inside (8) of the bottom area (6) for common receiving and / or common support of the plurality of battery cells, wherein the plurality of battery cell holders (7) are preferably designed as profiled sheets. Page 56 / 67 P81091DE 3. Battery housing component (2) according to one of claims 1 or 2, characterized in that the battery housing component (2) has support struts (9) for supporting the battery cell holders (7) on the inside (8) of the bottom area (6), wherein the support struts (9) are integral with the battery cell holders (7), and / or the support struts (9) are integral with the bottom area (6).

4. Battery housing component (2) according to one of the preceding claims, characterized in that the plurality of battery cell holders (7) are designed as stiffening elements for stiffening the battery housing component (2) in the bottom area (6), wherein the plurality of battery cell holders (7) are made of a uniform material as stiffening elements for stiffening the battery housing component (2) in the bottom area (6), and / or the plurality of battery cell holders (7) have at least one connection area facing the bottom area (6) made of a first material for a material-fit connection with the bottom area (6) and a stiffening area made of a second material for stiffening the battery housing component (2) in the bottom area (6).

5. Battery housing component (2) according to one of the preceding claims, characterized in that the plurality of battery cell holders (7) are designed as heat conducting elements for heat conduction from battery cells placed therein and / or supported thereon, wherein -56- Page 57 / 67 P81091DE the plurality of battery cell holders (7) are made of a uniform material as heat conducting elements for heat conduction for battery cells held therein and / or supported thereon, and / or the plurality of battery cell holders (7) have at least one connection area facing the bottom area (6) made of a first material for a material-bonded connection with the bottom area (6) and a heat conduction area facing away from the bottom area (6) made of a third material for heat conduction for battery cells held therein and / or supported thereon, wherein preferably the heat conduction area is designed with a contact surface for thermal contacting the battery cells held therein and / or supported thereon.

6. Battery housing component (2) according to one of the preceding claims, characterized in that the battery housing component (2) has a plurality of battery cell holders (7) for common receiving and / or common support of a group of battery cells, wherein the group of battery cells is in particular arranged in a row, and the plurality of battery cell holders (7) for common receiving and / or common support of the group of battery cells have a common orientation on the inside (8) of the bottom area (6) to form at least one common receiving and / or common support of the group of battery cells.

7. Battery housing component (2) according to one of the preceding claims, characterized in that Page 58 / 67 P81091DE the plurality of battery cell holders (7) is designed for the common receiving and / or common support of the battery cells in several groups of battery cells, wherein the battery cell holders (7) for the common receiving and / or common support of the battery cells of each group are preferably designed for the common receiving and / or common support of the battery cells of one of the groups of battery cells, and the plurality of battery cell holders (7) for the common receiving and / or common support of the battery cells are designed and / or arranged such that the battery cell holders (7) have a common orientation on the inside (8) of the bottom area (6) with a common orientation of the battery cell holders (7) for the common receiving and / or common support of the battery cells of several groups to each other,especially for the joint alignment of the battery cell groups on a common plane.

8. Battery housing component (2) according to one of the preceding claims, characterized in that the battery cell holders (7) are materially connected to the base area (6) by a welded connection, or the battery cell holders (7) are materially connected to the base area (6) by an adhesive connection.

9. Battery housing component (2) according to one of the preceding claims, characterized in that the plurality of battery cell holders each have a longitudinal extension for common reception -58- Page 59 / 67 P81091DE and / or for the common support of a plurality of battery cells, wherein the plurality of battery cell holders (7) are arranged at least partially parallel in the direction of the longitudinal extent, and / or the plurality of battery cell holders (7) are arranged in two different orientations in the direction of the longitudinal extent, wherein the two different orientations are preferably orthogonal to each other, and / or the plurality of battery cell holders (7) are arranged in more than two different orientations in the direction of the longitudinal extent, and / or the plurality of battery cell holders (7) are arranged in the direction of the longitudinal extent such that the battery cell holders (7) at least partially come into contact and / or overlap each other.

10. Battery housing component (2) according to one of the preceding claims, characterized in that the battery cell holders (7) are designed with a positioning aid for positioning battery cells, wherein preferably the battery cell holders (7) have a support surface (13) for supporting the battery cells and the positioning aid is designed as a structural elevation and / or recess of the support surface (13).

11. Battery housing component (2) according to one of the preceding claims, characterized in that the majority of battery cell holders (7) have through-openings as pressure relief openings for the components received in the battery cell holders (7) and / or for the purpose of venting the components. Page 60 / 67 P81091DE ran supported battery cells, wherein the through-holes are preferably designed with predetermined breaking points for breakage in the event of a pressure increase.

12. Battery housing component (2) according to one of the preceding claims, characterized in that the battery cell holders (7) are designed as cross-plies, or at least a region of the battery cell holders (7) is designed as cross-plies, and / or the battery cell holders (7) are designed as organosheets, or at least a region of the battery cell holders (7) is designed as organosheets, and / or the battery cell holders (7) are designed as metal sheets, or at least a region of the battery cell holders (7) is designed as metal sheets, preferably as aluminum sheets or as steel sheets.

13. Battery housing (1) for receiving a plurality of battery cells and / or at least one battery module with a plurality of battery cells, comprising a battery housing component (2) according to one of the preceding claims.

14. 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 (1) according to claim 13, 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 battery housing (1).

15. Motor vehicle, in particular electric motor vehicle with a traction battery according to claim 14. Page 61 / 67 P81091DE 16. Method for manufacturing a battery housing component (2) according to any one of claims 1 to 12, comprising the following method steps: Manufacturing a base body (5) of the battery housing component (2) from a thermoplastic material with a substantially flat bottom area (6) in a thermoplastic forming process, arranging a plurality of battery cell holders (7) on an inner side (8) of the bottom area (6) of the base body (5) of the battery housing component (2) , and joining the battery cell holders together in a material-fit manner (7) with the inside (8) of the base area (6) with common alignment of the battery cell holders (7) on the inside (8) of the base area (6) to form at least one common receptacle and / or to jointly support the majority of battery cells.

17. Method according to claim 16, characterized in that the materially bonded connection of the battery cell holders (7) with the inside (8) of the base area (6) under common alignment of the battery cell holders (7) on the inside (8) of the base area (6) to form at least one common receptacle and / or to jointly support the plurality of battery cells comprises bonding the battery cell holders (7) with the inside (8) of the base area (6), and / or the materially bonded connection of the battery cell holders (7) with the inside (8) of the base area (6) under common alignment of the battery cell holders (7) on the inside (8) of the base area (6) to form at least one common receptacle and / or to jointly support the plurality of battery cells comprises welding the battery cell holders (7) with the inside (8) of the base area (6). Page 62 / 67 P81091DE 18. Method according to claim 17, characterized in that the welding of the battery cell holders (7) to the inside (8) of the bottom area (6) comprises welding the battery cell holders (7) to the inside (8) of the bottom area (6) in a residual heat of the step for producing the base body (5) of the battery housing component (2) from the thermoplastic plastic in a thermoplastic forming process.

19. Method according to claim 17 or 18, characterized in that the welding of the battery cell holders (7) to the inside (8) of the bottom area (6) comprises welding the battery cell holders (7) to the inside (8) of the bottom area (6) by means of a contact heat-based welding process, for example a hot plate welding or mirror welding, a vibration welding process or an ultrasonic welding process.

20. Method according to claims 17 to 19, characterized in that the welding of the battery cell holders (7) to the inside (8) of the bottom area (6) comprises a partial immersion of the battery cell holders (7) in the connection area into a melt of the bottom area (6).

21. Method according to one of claims 17 to 20, characterized in that the arrangement of a plurality of battery cell holders (7) on an inner side (8) of the bottom area (6) of the base body (5) of the battery housing component (2) is a Page 63 / 67 P81091DE Arranging the plurality of battery cell holders (7) from a material with a higher melting point than the material of the base body (5), in particular PET or PI, or the plurality of battery cell holders (7) each comprising a connection area made of a material with a higher melting point than the material of the base body (5), in particular PET or PI.

22. Method according to one of claims 16 to 21, characterized in that the method comprises an additional step for clamping the base body (5) of the battery housing component (2) before the materially interlocking connection of the battery cell holders (7) with the inside (8) of the bottom area (6).

23. Method according to one of claims 16 to 22, characterized in that the method comprises an additional step for cooling the battery housing component (2) after welding the battery cell holders (7) to the inside (8) of the bottom area (6), in particular cooling the base body (5) of the battery housing component (2) in connection areas with the battery cell holders (7), preferably by contact cooling.

24. Battery housing component (2) for a battery housing (1) of a traction battery, wherein the battery housing component (2) has a base body (5) made of a thermoplastic material with a substantially flat bottom area (6) and is designed to accommodate and / or support battery cells, wherein the battery housing component (2) is manufactured using the method according to any one of claims 16 to 23. Page 64 / 67 P81091DE 25. Device (15) for manufacturing a battery housing component (2) according to any one of claims 1 to 12, comprising: a holding device (16) for holding the base body (5) of the battery housing component (2) after a thermoplastic forming process, a positioning device (17) for arranging a plurality of battery cell holders (7) for receiving and / or supporting a plurality of battery cells on an inner side (8) of a bottom region (6) of the base body (5), and a welding device (18) for joining the battery cell holders (7) to the inner side (8) of the bottom region (6) of the base body (5) with a common alignment of the battery cell holders (7) on the inner side (8) of the bottom region (6) to form at least one common receptacle and / or to support the plurality of battery cells, wherein the holding device (16) is configured to hold the base body (5) during welding with the welding device (18).and the positioning device (17) is designed to arrange the plurality of battery cell holders (7) on the inside (8) of a bottom area (6) of the base body (5) during welding with the welding device, (18) .

26. Device (15) according to claim 25, characterized in that the welding device (18) has a plurality of heating mirrors (19) has for heating the bottom area (6) of the base body (5) in areas for the materially bonded connection of the bottom area (6) with the battery cell holders (7) , wherein Page 65 / 67 P81091DE the heating mirrors (19) are preferably designed to be movable as heating stamps for contacting the areas of the base area (6) for a material-bonded connection with the battery cell holders (7) , and wherein the heating stamps are preferably pneumatically controllable for contacting the areas of the base area (6) for a material-bonded connection with the battery cell holders (7) .

27. Device (15) according to one of claims 25 or 26, characterized in that the device (15) has a cooling device (20) for cooling the bottom area (6) of the base body (5), in particular with a plurality of cooling mirrors (21) for cooling the bottom area (6) of the base body (5) in areas that are materially connected to the battery cell holders (7), wherein the cooling mirrors (21) are preferably movable as cooling plungers to contact the areas of the base area (6) that are materially connected to the battery cell holders (7), and wherein the cooling plungers are preferably pneumatically actuated to contact the areas of the base area (6) , which are materially compatible with the battery cell holders (7) are connected.

28. Device (15) according to claim 27, characterized in that the device (15) has a transport device (22) for transporting the base body (5) of the battery housing component (2) between the welding device (18) and the cooling device (20), wherein the transport device (22) is preferably designed for linear transport. Page 66 / 67 P81091DE movement of the base body (5) of the battery housing component (2) between the welding device (18) and the cooling device (20), or the device (15) has a positioning device for alternative positioning of the welding device (18) and the cooling device (20) on the base body (5) of the battery housing component (2), wherein the positioning device is preferably designed for linear movement of the welding device (18) and the cooling device (20) to the base body (5) of the battery housing component (2), and wherein, in particular, the welding device (18) and the cooling device (20) are held on a linear guide and are jointly linearly movable.

29. Device (15) according to one of claims 25 to 27, characterized in that the holding device (16) for holding the base body (5) of the battery housing component (2) is designed to clamp the base body (5) of the battery housing component (2), in particular to clamp the bottom area (6) of the base body (5).

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