Battery housing component, method for producing a battery housing component

Abstract

The present invention discloses a battery housing component (10) for a traction battery, wherein the battery housing component (10) has the following features: - the battery housing component (10) has a base part (20) which comprises a first plastic; - the battery housing component (10) has at least one integrally formed protective element (30) which has a second plastic; - the protective element (30) has at least two longitudinal recesses (33); - a first region (31) of the protective element (30), which is arranged between the at least two longitudinal recesses (33), is vertically offset with respect to at least one second region (32) in such a way that the first region (31) of the protective element (30) forms part of an outer face (12) of the battery housing component (10) and the second region (32) of the protective element (30) forms part of an inner face (11) of the battery housing component (10); - the protective element (30) is connected to the base part (20) in such a way that at least one longitudinal recess (33) of the protective element (30) is closed by the base component (20). The present invention further discloses a battery housing for receiving battery cells and / or battery modules, a traction battery for a motor vehicle, a motor vehicle having a traction battery, and a method for producing a battery housing component (10).

Description

[0001] BATTERY HOUSING COMPONENT, METHOD FOR MANUFACTURING A BATTERY HOUSING COMPONENT

[0002] The present invention relates to a battery housing component for a traction battery and a method for producing the same. Furthermore, the present invention relates to a battery housing for accommodating battery cells and / or battery modules, a traction battery for a motor vehicle, and a motor vehicle having a traction battery.

[0003] Battery housing components for traction batteries have to meet high requirements in terms of their mechanical stability and fire resistance. Battery housing components, in particular battery housing components that are installed in the base area of ​​a traction battery housing or a traction battery, generally also serve to protect against external mechanical influences, such as those that occur when driving over an obstacle and this obstacle collides with the battery housing component. Corresponding battery housing components can therefore be designed as underbody protection or as a battery housing shell with impact protection. Above a certain temperature, the battery cells or battery modules arranged inside a traction battery housing enter an irreversible chemical process of decomposition in which a large amount of the stored energy is released through oxidation in a short time.An initially closed battery cell builds up pressure and bursts at a predetermined location, from which a hot gas jet emerges at high speed. This gas jet, upon impact with the surface of a battery housing component, for example, a battery casing, places both thermal and abrasive stresses on it due to particles entrained in the gas jet.

[0004] In the event of a fire outside a traction battery housing or a traction battery, the battery cells or battery modules located within the traction battery housing must be protected from heat penetration into the receiving volume of the traction battery housing. Furthermore, the mechanical integrity of the battery housing components must be ensured for as long as possible.

[0005] To ensure the safety of the traction battery, a thermally and mechanically resistant battery housing is of great importance.

[0006] Battery housing components made of plastic, especially fiber-reinforced plastics, exhibit excellent mechanical stability and good thermal insulation. However, their structure can be quite complex, making the manufacture of a corresponding battery housing component challenging.

[0007] The invention is based on the object of providing an improved battery housing component which has increased stability under thermal and mechanical stress and has a simplified structure.

[0008] The object underlying the present invention is achieved by a battery housing component having the features of claim 1. Advantageous embodiments of the battery housing component are described in the claims dependent on claim 1.

[0009] More specifically, the object underlying the present invention is achieved by a battery housing component for a traction battery, wherein the battery housing component has a base component which comprises a first plastic, and at least one integrally formed protective element which comprises a second plastic. The protective element has at least two longitudinal recesses, wherein a first region of the protective element, which is arranged between the at least two longitudinal recesses, is offset in height with respect to at least a second region such that the first region of the protective element forms part of an outer side of the battery housing component and the second region of the protective element forms part of an inner side of the battery housing component. The protective element is connected to the base component such that at least one longitudinal recess of the protective element is closed by the base component.

[0010] The correspondingly designed battery housing component has the advantage that it has increased stability due to a quasi-sandwich construction. According to the invention, the quasi-sandwich construction means that the at least one first region of the protective element and the second regions of the protective element that surround this first region have different height levels. The first region and the second regions of the protective element that surround it are part of the integrally formed protective element, and the first region is in contact with the second regions that surround it by means of the base component and is preferably connected to the second regions by means of the base component. This is because the base component closes the at least one longitudinal recess in the protective element.

[0011] At the same time, the battery housing component according to the invention has a simple structure and can be manufactured without the use of tools. According to the invention, out-of-tool production means that the battery housing component, after its manufacture using a tool, does not require any further production steps for its completion.

[0012] The base component can also be referred to as a carrier component. The base component is preferably formed in one piece. More preferably, the base component is formed monolithically. The first plastic is preferably a thermoplastic. The first plastic preferably comprises polyamide (PA) and / or polypropylene (PP) and / or polypropylene terephthalate (PPT).

[0013] The protective element can also be referred to as a reinforcing element. The protective element is preferably formed in one piece. More preferably, the protective element is formed monolithically. The second plastic is preferably a thermoplastic. The second plastic preferably comprises polyamide (PA) and / or polypropylene (PP) and / or polypropylene terephthalate (PPT).

[0014] The second plastic may also comprise a thermosetting plastic or be formed from a thermosetting plastic.

[0015] The first plastic and the second plastic are preferably selected such that they are weldable with each other. Consequently, the first plastic and the second plastic are preferably weldable with each other.

[0016] The second region or regions of the protective element is / are directly adjacent to the first region of the protective element and is / are separated from it only by the longitudinal recess.

[0017] In a plan view of the protective element, i.e., in a viewing direction parallel to the normal vector of the second region, the protective element is preferably continuous. Consequently, the first region and the second regions completely cover the projection surface of the protective element.

[0018] Preferably, the protective element is connected to the base component in such a way that all longitudinal recesses of the protective element are closed by the base component.

[0019] The protective element is preferably produced by at least two longitudinal recesses being made or cut into a planar or flat component. The longitudinal recesses preferably do not run from one end of the component to the opposite end. In other words, the longitudinal recesses begin and end in the flat component. This also ensures that the protective element is formed in one piece. After the at least two longitudinal recesses have been made, the area between the two longitudinal recesses is pressed down relative to the directly adjacent second areas, so that the first area of ​​the protective element is offset in height relative to the second area or areas that border the first area.

[0020] Preferably, the battery housing component is designed such that in the protective element the first region is delimited or enclosed by two second regions, wherein the first region is offset in height with respect to the two second regions, so that the first region of the protective element forms part of the outside of the battery housing component and the two second regions of the protective element forms part of the inside of the battery housing component.

[0021] Further preferably, the battery housing component is designed such that the protective element has an integer multiple of two longitudinal recesses, i.e. e.g. two or four or six etc. longitudinal recesses. Between each two directly adjacent longitudinal recesses, a first region of the protective element is formed, which is delimited or enclosed by two second regions, each of the first regions being offset in height with respect to the two second regions, so that the respective first regions of the protective element form part of the outside of the battery housing component and the second regions of the protective element form part of the inside of the battery housing component.

[0022] Preferably, the battery housing component is designed such that the battery housing component has a connecting flange arranged on the edge.

[0023] Preferably, the battery housing component is designed such that the base component lies on a first connecting surface of the first region of the protective element facing the inside of the battery housing component and / or on a second connecting surface of the at least one second region of the protective element facing the outside of the battery housing component.

[0024] The correspondingly designed battery housing component has further improved rigidity. The battery housing component is preferably designed such that the base component is connected, preferably materially connected, to the first connecting surface of the first region facing the inside of the battery housing component. Further preferably, the battery housing component is designed such that the base component is connected, preferably materially connected, to the second connecting surface of the at least one second region of the protective element facing the outside of the battery housing component.

[0025] The object underlying the present invention is achieved by a battery housing component having the features of claim 3.

[0026] More specifically, the object underlying the present invention is achieved by a battery housing component for a traction battery, wherein the battery housing component has a base component which has a first plastic, and at least one integrally formed protective element which has a second plastic. The protective element has at least one longitudinal recess, wherein the protective element is connected to the base component in such a way that the longitudinal recess of the protective element is closed by the base component, and that the protective element forms part of an inside or an outside of the battery housing component, and that the region of the base component which closes the longitudinal recess of the protective element forms the remaining part of the inside of the battery housing component.

[0027] The correspondingly designed battery housing component has the advantage that it has increased stability due to a sandwich construction. According to the invention, the sandwich construction means that the base component is arranged at least in sections between the protective element and the protective plate. At the same time, the battery housing component according to the invention has a simple structure and can be manufactured using a tool. According to the invention, the term “tool-free production” means that the battery housing component does not require any further production steps for its completion after it has been manufactured using a tool.

[0028] The base component can also be referred to as a carrier component. The base component is preferably formed in one piece. More preferably, the base component is formed monolithically. The first plastic is preferably a thermoplastic. The first plastic preferably comprises polyamide (PA) and / or polypropylene (PP) and / or polypropylene terephthalate (PPT).

[0029] The longitudinal recess extends through the protective element. Consequently, the longitudinal recess can also be referred to as a longitudinal section. The protective element is preferably curved in the region adjacent to the longitudinal recess and extends toward the outside of the battery housing component.

[0030] The protective element can also be referred to as a reinforcing element. The protective element is formed in one piece. The protective element is preferably monolithic. The second plastic is preferably a thermoplastic. The second plastic preferably comprises polyamide (PA) and / or polypropylene (PP) and / or polypropylene terephthalate (PPT).

[0031] The second plastic may also comprise a thermosetting plastic or be formed from a thermosetting plastic.

[0032] Preferably, the battery housing component is designed such that it has at least one protective plate comprising the second plastic and connected on the outside of the battery housing component to the base component arranged in the longitudinal recess. The correspondingly designed battery housing component has further improved rigidity.

[0033] Preferably, the battery housing component is designed such that the inside of the battery housing component, which is formed by the protective element, is to be connected at least indirectly to a battery cell and / or to a battery module.

[0034] Preferably, the battery housing component is designed such that the battery housing component has a connecting flange arranged on the edge.

[0035] Preferably, the battery housing component is designed such that the protective element is materially connected to the base component.

[0036] The correspondingly designed battery housing component has even improved mechanical stability.

[0037] The material-locking connection of the protective element to the base component is preferably achieved by welding. Furthermore, the protective element is materially connected to the base component by arranging the protective element in an injection-molding tool and allowing the first plastic of the base component, which is in a liquid state, to flow around it, so that the first plastic of the base component at least partially melts the second plastic of the protective element.

[0038] Further preferably, the material connection of the protective element to the base component is realized by bonding the base component to the protective element. The same applies if a protective plate as described above is provided. This can be welded and / or bonded to the base component.

[0039] Preferably, the battery housing component is designed such that the protective element is fiber-reinforced, preferably endless fiber-reinforced, and / or that the base component is fiber-reinforced, preferably short fiber-reinforced and / or long fiber-reinforced.

[0040] In the correspondingly designed base component, the fiber material is arranged in a matrix material formed by the first plastic. The fiber material preferably comprises glass fibers and / or amide fibers and / or carbon fibers.

[0041] In the correspondingly designed protective element, the fiber material is arranged in a matrix material formed by the second plastic. The fiber material preferably comprises glass fibers and / or amide fibers and / or carbon fibers.

[0042] The correspondingly designed battery housing component has even better mechanical stability. Furthermore, the correspondingly designed battery housing component has an improved protective effect and improved mechanical stability under thermal stress. This is because a fiber-reinforced, in particular a continuously fiber-reinforced protective element essentially retains its mechanical stability when the matrix material (e.g. a thermoplastic as described above) in which the fiber material is embedded softens or is even liquefied due to the supply of heat. The fiber material of the protective element and / or the protective plate and / or the base component can be designed as a woven structure. Furthermore, the fiber material can be designed as a cross-ply. Furthermore, the fiber material can be designed with unidirectionally arranged fibers with different orientations.

[0043] In the base component, the weight proportion of the fiber material is preferably between 5% and 70%, more preferably between 10% and 65%, more preferably between 20% and 60%, more preferably between 30% and 50%, and more preferably 45%. In the protective element and / or the protective plate, the weight proportion of the fiber material is preferably between 5% and 80%, more preferably between 10% and 75%, more preferably between 20% and 70%, more preferably between 30% and 60%, and more preferably 60% or 80%.

[0044] The protective element and / or the protective plate is preferably designed as an organic sheet or as a cross-ply.

[0045] Further preferably, the battery housing component is designed such that the inner side of the battery housing component, which is formed by the second region of the protective element, is designed to be connected at least indirectly to a battery cell and / or to a battery module.

[0046] The indirect connection of the battery cell or battery module to the inside of the battery housing component can be realized, for example, by arranging a cooling element between the inside of the battery housing component and the battery cell or battery module. Furthermore, a thermally conductive paste can be arranged between the cooling element and the inside of the battery housing component. Furthermore, a thermally conductive paste can be arranged between the cooling element and the battery cells and / or battery modules.

[0047] Preferably, the battery housing component is designed such that the base component has reinforcing elements.

[0048] The correspondingly designed battery housing component has a further improved rigidity, while the weight of the battery housing component is reduced.

[0049] The reinforcing elements may comprise reinforcing ribs and / or reinforcing honeycombs. In the latter case, the reinforcing elements have a honeycomb structure.

[0050] The reinforcing elements are preferably formed monolithically with the base component.

[0051] Further preferably, the battery housing component is designed such that the reinforcing elements are formed on the inside of the battery housing component and / or on the outside of the battery housing component.

[0052] Preferably, the battery housing component is designed such that the battery housing component has at least one fastening element which is formed integrally in the base component.

[0053] A suitably designed battery housing component enables simplified fastening of battery cells and / or battery modules to the battery housing component. Furthermore, a connection to another battery housing component, for example a battery housing cover, is made easier. Preferably, the at least one fastening element is formed on the inside of the battery housing component. Further preferably, the at least one fastening element is arranged between two adjacent second regions of the protective element which enclose a first region. However, it is also possible for the at least one fastening element to be formed on the outside of the battery housing component.

[0054] The at least one fastening element is preferably designed as a bushing, preferably as a screw-on bushing. Further preferably, the at least one fastening element is designed as a fastening pin and / or as a centering pin. The fastening pin is preferably designed to taper conically toward its free end.

[0055] Preferably, the battery housing component is designed such that the battery housing component is designed as underbody protection.

[0056] Preferably, the battery housing component is designed such that the battery housing component is designed as a battery housing shell and at least partially delimits a receiving volume which is designed to receive battery cells and / or battery modules.

[0057] The battery housing component can preferably be designed as an underbody protection and a battery housing shell. In this case, the battery housing shell also serves as underbody protection.

[0058] The battery housing shell preferably has a circumferential boundary wall. The protective element preferably extends into the boundary wall, so that the protective element is arranged on a side of the boundary wall facing the receiving volume of the battery housing shell. The base component preferably extends into the boundary wall, so that the base component is arranged on a side of the boundary wall facing away from the receiving volume of the battery housing shell.

[0059] The object underlying the present invention is further achieved by a battery housing for accommodating battery cells and / or battery modules, wherein the battery housing has a battery housing component as described above.

[0060] The object underlying the present invention is further achieved by a traction battery for a motor vehicle, which has at least one battery cell and / or at least one battery module and a battery housing as described above, wherein the at least one battery cell and / or the at least one battery module is / are arranged in the battery housing.

[0061] Furthermore, the object underlying the present invention is achieved by a motor vehicle, in particular an electric vehicle, with a traction battery as described above.

[0062] The object underlying the present invention is further achieved by a method for producing a battery housing component described above by means of injection molding, the method comprising the following method steps:

[0063] Providing an injection molding tool with a first injection molding tool half and a second injection molding tool half;

[0064] Providing a protective element comprising a second plastic which has at least two longitudinal recesses;

[0065] Positioning and holding the protective element between the first and second injection mold halves in an open position; closing the injection mold;

[0066] Injecting a first plastic material, which forms the base component, into the injection molding tool in the closed position, so that the first plastic material flows around the protective element in such a way that at least one longitudinal recess of the protective element is closed by the base component;

[0067] Opening the injection mold and removing the battery housing component.

[0068] This method according to the invention has the advantage that the battery housing component can be produced without the need for tools.

[0069] Preferably, the method comprises a method step of forming the protective element such that a first region of the protective element, which is arranged between the at least two longitudinal recesses, is offset in height with respect to at least a second region, such that the first region of the protective element forms part of an outer side of the battery housing component to be manufactured and the second region of the protective element forms part of an inner side of the battery housing component;

[0070] Preferably, the forming of the protective element, in which the first region of the protective element, which is arranged between the at least two longitudinal recesses, is offset in height with respect to at least a second region, such that the first region of the protective element forms part of an outer side of the battery housing component to be produced and the second region of the protective element forms part of an inner side of the battery housing component, takes place during the closing process of the injection mold. This forming preferably takes place by means of the closing movement of the injection mold.

[0071] Preferably, the protective element is preheated before positioning between the injection mold halves. A corresponding process facilitates improved welding of the protective element to the base component.

[0072] Furthermore, the object underlying the present invention is achieved by a method for producing a battery housing component described above by means of extrusion, the method comprising the following method steps:

[0073] Providing an extrusion tool with a die and a punch;

[0074] Placing at least one protective element having at least two longitudinal recesses and at least one plastic comprising a first plastic in the die of the extrusion tool in the open position;

[0075] Closing the extrusion tool and forming the protective element in such a way that the punch of the extrusion tool comes into contact with the at least one plastic and the plastic is formed by applying pressure by means of the punch in such a way that the plastic flows around the protective element in such a way that at least one longitudinal recess of the protective element is closed by the plastic forming the base component; and

[0076] Opening the extrusion tool and removing the battery housing component.

[0077] This method according to the invention has the advantage that the battery housing component can be produced without the need for tools.

[0078] The method preferably comprises a method step of forming the protective element such that a first region of the protective element, which is arranged between the at least two longitudinal recesses, is offset in height with respect to at least a second region, such that the first region of the protective element forms part of an outer side of the battery housing component to be manufactured and the second region of the protective element forms part of an inner side of the battery housing component.

[0079] Preferably, the protective element is preheated before being placed in the die. A corresponding process facilitates improved welding of the protective element to the base component.

[0080] Further advantages, details and features of the invention will become apparent from the following exemplary embodiments. These show in detail:

[0081] Figure 1: a perspective view of a battery housing component according to the invention according to a first embodiment of the present invention;

[0082] Figure 2: a perspective view of a battery housing component according to the invention according to a second embodiment of the present invention;

[0083] Figure 3: a perspective view of a battery housing component according to the invention according to a third embodiment of the present invention;

[0084] Figure 4: a perspective view of a protective element of the battery housing component shown in Figure 3 in isolation;

[0085] Figure 5A: a perspective sectional view of the battery housing component according to the first, second and third embodiments of the present invention;

[0086] Figure 5B is a side sectional view of the battery housing component shown in Figure 5A; and Figure 6 is a perspective sectional view of a battery housing component according to a fourth embodiment of the present invention.

[0087] In the following description, identical reference symbols designate identical components or identical features, so that a description of a component made with reference to one figure also applies to the other figures, thus avoiding repetitive description. Furthermore, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0088] Figure 1 shows a perspective view of a battery housing component 10 according to a first embodiment of the present invention. The battery housing component 10 is shown in a perspective sectional view in Figure 5A and in a side sectional view in Figure 5B.

[0089] The battery housing component 10 shown in Figure 1 is designed as a battery housing shell 10 for receiving battery cells and / or battery modules not shown in the figures. The battery cells and / or the battery modules can be received in a receiving volume 14 of the battery housing component 10, wherein the receiving volume 14 is partially delimited by an inner side 11 and a circumferential side wall 13 of the battery housing component 10. The battery housing component 10 has a connecting flange 15 arranged on the edge. Furthermore, the battery housing component 10 has a plurality of fastening structures 16, by means of which the battery housing component 10 can be fastened to a vehicle, for example, or by means of which further components can be fastened to the battery housing component 10.The battery housing component 10 has a base component 20, which comprises a first plastic material. The base component, which can also be referred to as a carrier component 20, is formed in one piece, more precisely, monolithically, in the illustrated embodiments.

[0090] The battery housing component 10 further comprises a protective element 30 which comprises a second plastic. The protective element 30, which can also be referred to as a reinforcing element 30, is formed in one piece, more precisely monolithically. The protective element 30 has at least two longitudinal recesses 33, wherein the longitudinal recesses 33 each extend through the protective element 30. A first region 31 of the protective element 30, which is arranged between the two longitudinal recesses 33, is offset in height with respect to two second regions 32 such that the first region 31 of the protective element 30 forms part of an outer side 12 of the battery housing component 10 and the second regions 32 of the protective element 30 form part of the inner side 11 of the battery housing component 30. The protective element 30 is connected to the base component 20 in such a way that the longitudinal recesses 33 of the protective element 30 are closed by the base component 20.

[0091] The battery housing component 10 is designed such that, in a plan view of the protective element 30, i.e., in a viewing direction parallel to the normal vector of the second region 32, the protective element 30 is continuous. This means that the first region 31 and the second regions 32 completely cover the projection surface of the battery housing component 10.

[0092] The battery housing component 10 has a quasi-sandwich construction. The first region 31 of the protective element 30 and the second regions 32 of the protective element 30 surrounding this first region 31 have different height levels. The first region 31 and the second regions 32 of the protective element 30 surrounding it are part of the integrally formed protective element 30, and the first region 31 is in contact with the second regions 32 surrounding it by means of the base component 20.

[0093] As can be seen in particular from Figures 5A and 5B, the base component 20 rests on a first connecting surface 31-1 of the first region 31 of the protective element 30, said first connecting surface facing the inner side 11 of the battery housing component 10. Furthermore, the base component 20 rests on a second connecting surface 32-2 of the second regions 32 of the protective element 30, said second connecting surface facing the outer side 12 of the battery housing component 10.

[0094] In the illustrated embodiments, the base component 20 is materially connected to the first connecting surface 31-1 of the first region 31 facing the inner side 11 of the battery housing component 10. Furthermore, the base component 20 is materially connected to the second connecting surface 32-2 of the second regions 32 of the protective element 30 facing the outer side 12 of the battery housing component 10.

[0095] It is also evident from all figures that the base component 20 has reinforcing elements 21. The reinforcing elements 20 are designed as intersecting reinforcing ribs, which, due to their arrangement, form a honeycomb structure. The reinforcing elements 21 are formed on the inner side 11 of the battery housing component 10 and on the outer side 12 of the battery housing component 10.

[0096] Furthermore, it can be seen from all figures that the battery housing component 10 has fastening elements 22, 23, which are formed integrally in the base component 20. The fastening elements 22, 23 are formed on the inner side 11 of the battery housing component 10. The fastening elements 22, 23 are arranged between two adjacent second regions 32 of the protective element 30, which enclose the first region 31.

[0097] Some of the fastening elements 22 are designed as bushings 22, preferably as screw-on bushings 22. Another part of the fastening elements 23 is designed as fastening pins 23 or as centering pins. The fastening pins are each designed to taper conically towards their free ends.

[0098] Figure 2 shows a perspective view of a battery housing component 10 according to a second embodiment of the present invention. The battery housing component 10 according to the second embodiment differs from the battery housing component 10 shown in Figure 1 only in that the battery housing component 10 according to the second embodiment has a larger extent and has more first regions 31 and second regions 32 enclosing them.

[0099] From Figure 2 it can be seen that the battery housing component 10 is designed such that the protective element 30 has an integer multiple of two longitudinal recesses 33, that is to say, for example, two or four or six, etc. longitudinal recesses. In the embodiment shown, the protective element 30 has six longitudinal recesses 33 (corresponding to three times two longitudinal recesses 33). Between each two directly adjacent longitudinal recesses 33, a first region 31 of the protective element 30 is formed, which is delimited or surrounded by two second regions 32. is enclosed, wherein each of the first regions 31 is offset in height with respect to the two second regions 32, so that the respective first regions 31 of the protective element 30 form part of the outer side 12 of the battery housing component 10 and the second regions 32 of the protective element 30 form part of the inner side 11 of the battery housing component 10.

[0100] The remaining structure of the battery housing component 10 according to the second embodiment is identical to the structure of the battery housing component 10 according to the first embodiment, so that with regard to the further structure, reference is made to the above description of the battery housing component 10 according to the first embodiment in order to avoid repetition.

[0101] Figure 3 shows a perspective view of a battery housing component 10 according to a third embodiment of the present invention. Figure 4 shows a perspective view of the protective element 30 of the battery housing component 10 shown in Figure 3 in isolation.

[0102] The battery housing component 10 according to the third embodiment differs from the battery housing component 10 according to the first and second embodiments in that the battery housing component 10 according to the third embodiment does not have a circumferential side wall 13. The battery housing component 10 according to the third embodiment can be used as underbody protection 10.

[0103] In the protective element 30 shown in isolation in Figure 4, the stepped construction of the protective element 30 is clearly visible.

[0104] The remaining structure of the battery housing component 10 according to the third embodiment is identical to the structure of the battery housing component 10 according to the first embodiment, so that with regard to the further structure, reference is made to the above description of the battery housing component 10 according to the first embodiment in order to avoid repetition. Figure 6 shows a perspective sectional view of a battery housing component 10 according to a fourth embodiment of the present invention.

[0105] The battery housing component 10 according to the fourth embodiment has a base component 20 which has a first plastic. The battery housing component 10 further has an integrally formed protective element 30 which has a second plastic. The protective element 30 has at least one longitudinal recess 34. The protective element 30 is connected to the base component 20 such that the longitudinal recess 34 of the protective element 30 is closed by the base component 20. The protective element 30 forms part of the inner side 11 of the battery housing component 10, and the region of the base component 20 which closes the longitudinal recess 35 of the protective element 30 forms the remaining part of the inner side 11 of the battery housing component 10.

[0106] The battery housing component 10 shown in Figure 6 has at least one protective plate 40 which has the second plastic and is connected on the outer side 12 of the battery housing component 10 to the base component 20 arranged in the longitudinal recess 34.

[0107] Wall sections 35 of the protective element 30, which border the longitudinal recess 34, are curved toward the outer side 12 of the battery housing component 10. Opposite regions of the protective element 30, which border the longitudinal recess 34, are connected to one another by connecting webs 36.

[0108] The remaining structure of the battery housing component 10 according to the fourth embodiment is identical to the structure of the battery housing component 10 according to the first embodiment, so that with regard to the further structure, reference is made to the above description of the battery housing component 10 according to the first embodiment in order to avoid repetition.

[0109] List of reference symbols

[0110] 10 Battery housing component

[0111] 11 Inside (of the battery housing component)

[0112] 12 Outside (of the battery housing component)

[0113] 13 Side wall (of the battery housing component)

[0114] 14 Storage volume (of the battery housing component)

[0115] 15 Connecting flange (of the battery housing component)

[0116] 16 Mounting structure

[0117] 20 Base component (of the battery housing component)

[0118] 21 Reinforcing element (of the base component)

[0119] 22 Fastening element / screw bushing (of the base component)

[0120] 23 Fastening element / fixing pin / centering pin / positioning pin (of the base component)

[0121] 30 Protective element (of the battery housing component)

[0122] 31 first area (of the protective element)

[0123] 31-1 first connecting surface (of the first area)

[0124] 32 second area (of the protective element)

[0125] 32-2 second connecting surface (of the second area)

[0126] 33 Longitudinal recess

[0127] 34 Longitudinal recess

[0128] 35 Wall section (of the protective element)

[0129] 36 Connecting bar (of the protective element)

[0130] 40 protective plate

Claims

Patent claims 1. A battery housing component (10) for a traction battery, the battery housing component (10) having the following features: the battery housing component (10) has a base component (20) comprising a first plastic; the battery housing component (10) has at least one integrally formed protective element (30) comprising a second plastic; the protective element (30) has at least two longitudinal recesses (33); a first region (31) of the protective element (30), which is arranged between the at least two longitudinal recesses (33), is offset in height with respect to at least a second region (32) such that the first region (31) of the protective element (30) forms part of an outer side (12) of the battery housing component (10) and the second region (32) of the protective element (30) forms part of an inner side (11) of the battery housing component (10);the protective element (30) is connected to the base component (20) in such a way that at least one longitudinal recess (33) of the protective element (30) is closed by the base component (20); 2. Battery housing component (10) according to claim 1, characterized in that the base component (20) is arranged on a first connecting surface (31—1) of the first region (31) of the protective element (30) and / or rests on a second connecting surface (32-2) of the at least one second region (32) of the protective element (30) facing the outer side (12) of the battery housing component (10).

3. Battery housing component (10) for a traction battery, wherein the battery housing component (10) has the following features: the battery housing component (10) has a base component (20) which has a first plastic; the battery housing component (10) has at least one integrally formed protective element (30) which has a second plastic; the protective element (30) has at least one longitudinal recess (34); the protective element (30) is connected to the base component (20) in such a way that the longitudinal recess (34) of the protective element (30) is closed by the base component (20), and that the protective element (30) forms part of an inner side (11) of the battery housing component (10), and that the region of the base component (20) which closes the longitudinal recess (34) of the protective element (30) forms the remaining part of the inner side (11) of the battery housing component (10).

4. Battery housing component (10) according to one of the preceding claims, characterized in that the protective element (30) is materially connected to the base component (20).

5. Battery housing component (10) according to one of the preceding claims, characterized in that the protective element (30) is fiber-reinforced, preferably continuous fiber-reinforced, and / or that the base component (20) is fiber-reinforced, preferably short fiber-reinforced and / or long fiber-reinforced.

6. Battery housing component (10) according to one of claims 1, 2, 4 or 5, characterized in that the inner side (11) of the battery housing component (10), which is formed by the second region (32) of the protective element (30), is designed to be connected at least indirectly to a battery cell and / or to a battery module.

7. Battery housing component (10) according to one of the preceding claims, characterized in that the base component (20) has reinforcing elements (21).

8. Battery housing component (10) according to claim 7, characterized in that the reinforcing elements (21) are formed on the inside (11) of the battery housing component (10) and / or on the outside (12) of the battery housing component (10).

9. Battery housing component (10) according to one of the preceding claims, characterized in that the battery housing component (10) has at least one fastening element (22, 23) which is formed integrally in the base component (20).

10. Battery housing component (10) according to one of the preceding claims, characterized in that the battery housing component (10) is designed as an underbody protection (10).

11. Battery housing component (10) according to one of the preceding claims, characterized in that the battery housing component (10) is designed as a battery housing shell (10) and at least partially delimits a receiving volume (14) which is designed to receive battery cells and / or battery modules.

12. Battery housing for accommodating battery cells and / or battery modules, comprising a battery housing component (10) according to one of the preceding claims.

13. Traction battery for a motor vehicle, comprising at least one battery cell and / or at least one battery module and a battery housing according to claim 12, wherein the at least one battery cell and / or the at least one battery module is / are arranged in the battery housing.

14. Motor vehicle, in particular electric vehicle with a traction battery according to claim 13.

15. A method for producing a battery housing component (10) according to one of claims 1, 2 or 4 to 11 by injection molding, comprising the following method steps: Providing an injection molding tool with a first injection molding tool half and a second injection molding tool half; Providing a protective element (30) comprising a second plastic, which has at least two longitudinal recesses (33); Positioning and holding the protective element (30) between the first and second injection mold halves in an open position; closing the injection mold; Injecting a first plastic material, which forms the base component (20), into the injection molding tool in the closed position, so that the first plastic material flows around the protective element (30) in such a way that at least one longitudinal recess (33) of the protective element (30) is closed by the base component (20); Opening the injection mold and removing the battery housing component (10).

16. A method for producing a battery housing component (10) according to one of claims 1, 2 or 4 to 11 by means of extrusion, comprising the following method steps: providing an extrusion tool with a die and a punch; placing at least one protective element (30) having at least two longitudinal recesses (33) and at least one plasticized product comprising a first plastic in the die of the extrusion tool in the open position; Closing the extrusion tool in such a way that the punch of the extrusion tool comes into contact with the at least one plasticized material and the plasticized material is deformed by applying pressure by means of the punch in such a way that the plasticized material flows around the protective element (30) in such a way that at least one longitudinal recess (33) of the protective element (30) is closed by the plasticized material forming the base component (20); and Open the extrusion tool and remove the battery housing component (10).

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