Underbody protection for a motor vehicle, battery housing for a drive battery, and motor vehicle equipped with a drive battery and underbody protection for a motor vehicle

Abstract

The present invention discloses an underbody protection portion (1) for a motor vehicle, the underbody protection portion (1) having at least one base component (10), at least one protective component (20), and at least two ribs (30). The at least two ribs (30) are sandwiched between the protective component (20) and the base component (10), and a plurality of hollow portions (40) are formed between the protective component (20) and an underside (12) of the base component (10), the plurality of hollow portions (40) being at least partially defined by the ribs (30), and the protective component (20) is connected to the base component (10). The present invention also discloses a battery housing (90) equipped with the underbody protection portion (1) of the present invention, a traction battery (80) equipped with the battery housing (90) of the present invention, and a motor vehicle equipped with the traction battery (80) of the present invention.

Description

[Technical Field]

[0001] The present invention relates to an underbody protection for a motor vehicle, in particular an electric vehicle. Furthermore, the present invention relates to a battery housing for a traction battery. Furthermore, the present invention relates to a traction battery for a motor vehicle. Finally, the present invention relates to a motor vehicle, in particular an electric vehicle, with an underbody protection.

[0002] Various types of underbody protection systems are known from the prior art. Heavy steel plates or welded steel modules are primarily used as underbody protections to absorb the high intrusion forces and collision energy when a vehicle dynamically contacts an obstacle. Such underbody protection systems increase the overall vehicle weight. Furthermore, underbody protections made of steel are more susceptible to corrosion. Furthermore, such underbody protection systems can cause distortion problems, especially when they are attached to plastic components of the vehicle. This is because the plastic components typically have a different coefficient of expansion when exposed to heat than the underbody protection system, which causes distortion of the underbody protection system when the temperature changes. Summary of the Invention [Problem to be solved by the invention]

[0003] The problem on which the present invention is based is to provide an underbody protection part that has high rigidity and energy absorption capacity, while at the same time being light in weight and with reduced distortion compared to underbody protection systems known from the prior art. [Means for solving the problem]

[0004] The problem on which the invention is based is solved by an underbody protection with the features of claim 1. Advantageous configurations of the underbody protection are set out in the dependent claims.

[0005] More specifically, the problem on which the invention is based is solved by an underbody protection for a motor vehicle, which comprises at least one base component, at least one protective component and at least two ribs, wherein the at least two ribs are sandwiched between the protective component and the base component, a plurality of cavities are formed between the protective component and the underside of the base component, the cavities being at least partially defined by the ribs, and the protective component is connected to the base component.

[0006] The underbody protection according to the present invention has the advantage that the underbody protection has an increased protective effect against mechanical forces, for example, during a collision. When a mechanical force occurs, such as when the vehicle dynamically contacts the ground, the protective element can deform toward the hollow portion of the underbody protection, and in so doing, can convert the energy generated by the collision into mechanical deformation energy. In this case, due to the deformation of the protective element toward the hollow portion of the underbody protection, the base component is protected from deformation, and therefore the components of the vehicle located above the protective element are effectively protected. As a result, the underbody protection has an improved protective effect against mechanical forces.

[0007] Furthermore, the underbody protection according to the invention has the advantage that, due to its layer structure, the tendency of the underbody protection to distort when heat is introduced is reduced.

[0008] Furthermore, the underbody protection according to the invention has weight advantages compared to underbody protection systems known from the prior art.

[0009] The underbody protection is designed for motor vehicles, in particular for electrically driven vehicles (electric vehicles).

[0010] The base component can have or be made of a plastic material, in which case it can also be referred to as a plastic component, and can have or be made of metal.

[0011] The underside of the base component is opposite the component (e.g., the traction battery) to which the underbody protection is attached. For example, if the base component is configured as a battery housing shell, the underside of the base component is located opposite the storage volume of the base component or the battery housing shell.

[0012] The base component formed as a plastic component can comprise a thermoplastic and / or a thermosetting plastic.

[0013] The base component, which is designed as a plastic component, can be designed at least in part as a fiber-reinforced plastic component, which improves the bending stiffness of the underbody protection.

[0014] The base component, which is formed as a plastic component, can have short and / or long and / or continuous fibers.

[0015] This makes it possible to further improve the bending rigidity of the underbody protection portion.

[0016] The fibers of the base component, which is formed as a plastic component, can be formed as glass fibers and / or carbon fibers and / or aramid fibers.

[0017] The base component, which is designed as a plastic component, can be produced using mass production moulds by pressing processes such as, for example, a long-fiber thermoplastic extrusion press, a glass mat thermoplastic moulding press or injection moulding.

[0018] The base component is preferably shell-shaped, the receiving space of the shell-shaped base component being located on the side opposite the rib.

[0019] The protective element may also be referred to as a protective plate. The protective element may be formed as a substantially flat component.

[0020] The protective element has a thickness extension in particular ranging between 0.5 mm (millimeters) and 5 mm, more preferably ranging between 1 mm and 4 mm, even more preferably ranging between 1.5 mm and 3 mm.

[0021] In particular, the underbody protection comprises a plurality of protection elements, each of which is arranged in a respective receiving area of ​​a base component, the base component being defined by at least one rib, in particular at least two ribs, more preferably at least three ribs, and even more preferably four ribs.

[0022] The underbody protection can have a plurality of ribs, where a first subset of the ribs can be oriented, for example, parallel to one another and a second subgroup of the ribs can be oriented intersecting the first subgroup of the ribs.

[0023] The ribs may have a wall thickness in the range of 1 mm to 5 mm, preferably in the range of 2 mm to 4 mm.

[0024] The ribs have a height extension in particular ranging from 4 mm to 30 mm, more preferably ranging from 8 mm to 15 mm.

[0025] The ribs may extend in a regular pattern between the protection element and the base component, thereby improving the bending stiffness of the underbody protection.

[0026] The plurality of hollow portions may have a width and / or length extension in the range of 30mm to 100mm, preferably in the range of 40mm to 60mm.

[0027] In particular, the protective element is detachable from the base component, so that if the protective element is damaged, it can be removed from the base component and replaced with a new protective element.

[0028] The protective element can be connected to the base component inter alia by force and / or by positive and / or material connection.

[0029] The protective element can be connected to the base component by means of a connecting element. The connecting element can be formed as a screw, a rivet, or other connecting element. For example, a recess with an undercut or a through hole can be formed in the protective element. The material of the base component can extend into the recess, thereby forming a rivet. Furthermore, the material of the base component can extend through a through hole, in particular one with a chamfered wall, thus forming a rivet. Furthermore, for example, the protective element can be glued to the base component. Furthermore, for example, the protective element can be welded to the base component.

[0030] The underbody protection can have several protection elements, in particular arranged next to each other, which can result in an increased flexibility of the underbody protection.

[0031] In particular, the underbody protection is formed in such a way that the protection element comprises at least one plastic layer and at least one protective layer connected to the plastic layer.

[0032] A correspondingly designed underbody protection part, even if light in weight, nevertheless offers a high degree of protection against mechanical effects due to collisions, for example resulting from dynamic contact of the vehicle with the ground.

[0033] The plastic layer may comprise a thermoplastic plastic, in particular polypropylene or polyamide, or alternatively, a thermosetting plastic.

[0034] The plastic layer can be at least partially formed as a fiber-reinforced plastic layer, which can improve the bending stiffness of the underbody protection.

[0035] The plastic layer can have long and / or continuous fibers, which can further improve the bending stiffness of the underbody protection.

[0036] The fibers of the plastic layer may be formed as glass fibers and / or carbon fibers and / or aramid fibers.

[0037] The protective layer can be formed, for example, as an organosheet. Organosheets are understood to be fiber matrix semi-finished products. These organosheets consist of fiber woven fabrics or fiber webs embedded in a thermoplastic matrix. This improves the thermoforming properties and thus shortens the production time. Furthermore, the bending stiffness of the underbody protection can be improved.

[0038] The protective layer may be formed, for example, as a metal sheet or layer, for example, as a steel sheet or plate.

[0039] The protective element can be produced simply, in particular by mass production, for example by pressing methods such as long fiber thermoplastic extrusion presses, glass mat thermoplastic molding presses or injection molding.

[0040] Furthermore, in particular, the underbody protection is formed in such a way that at least one protective layer is arranged on the outer surface of the protective element opposite the rib side.

[0041] An underbody protection that is designed accordingly has an even improved stability.

[0042] Furthermore, in particular, the underbody protection is formed in such a way that at least one protective layer is arranged on the inner surface of the protection element that is located on the rib side.

[0043] A correspondingly designed underbody protection has improved long-term stability, since the protective layer is protected against environmental factors (e.g., damage from moisture, sand, stones, etc. that are kicked up during driving).

[0044] Furthermore, in particular, the underbody protection portion is formed so that the protection member has two protection layers and a plastic layer connected to each of the two protection layers, and the plastic layer is sandwiched between a first protection layer arranged on the outer surface opposite the rib side of the protection member and a second protection layer arranged on the inner surface located on the rib side of the protection member.

[0045] An underbody protection that is designed accordingly has further improved stability and rigidity.

[0046] Furthermore, in particular, the underbody protection part is formed in such a way that the protective layer arranged on the inner surface located on the rib side has a plurality of through openings in the plastic layer that protrude beyond the material forming the rib.

[0047] A correspondingly designed underbody protection also has improved stability and is very easy to manufacture, since the position of the protective layer or the second protective layer arranged on the inner surface facing the rib is fixed by the rib protruding through the through-openings. The rib can be formed, for example, by pressing the material of the plastic layer into the through-openings of the protective layer.

[0048] In particular, the underbody protection is configured in such a way that the protection element is connected to the base component by means of a plurality of screws, at least part of which threads into one rib each.

[0049] An underbody protection part that is designed accordingly is highly stable and easy to manufacture, because the screws, and therefore the protection element, are particularly rigidly connected to the base component due to the fact that at least a portion of the screws are screwed into each rib. Furthermore, when screwing the screws into each rib, for example, no internal thread is required to secure the screws to the base component. This simplifies the manufacture of the underbody protection part.

[0050] The screw is in particular configured as a thread-forming screw, which forms a thread in the base component when screwed into the base component.

[0051] In particular, at least a portion of the screw is threaded into the intersection region of two ribs that extend across one another. An underbody protection that is configured accordingly has further improved stability.

[0052] In particular, the protective member is connected to the base component using 10 to 80 screws.

[0053] In particular, the underbody protection is formed such that at least a portion of the rib is integrally formed with the base component.

[0054] Correspondingly shaped underbody protections are easy to manufacture, since the base component, including the ribs integrally formed therewith, can be produced simply using a series production mold, for example, by a long-fiber thermoplastic extrusion press, a glass mat thermoplastic molding press or a pressing method such as injection molding.

[0055] The feature that at least some of the ribs are integrally formed with the base component can also be expressed as a subset of the ribs being integrally formed with the base component.

[0056] A plurality of ribs, particularly all of the ribs, can be integrally connected to the base component. "Integally connected" refers to two components manufactured from one joined piece. In particular, integrally connected components are connected to each other without any joints.

[0057] In particular, at least one protective element is in direct contact with the rib.

[0058] In particular, the underbody protection is formed such that at least a portion of the rib is formed integrally with the protection member.

[0059] Correspondingly shaped underbody protection can be easily manufactured, since the at least one protective element, including the rib formed integrally therewith, can be easily manufactured together in one manufacturing step.

[0060] The feature that at least some of the ribs are integrally formed with the protective member can also be expressed as a subset of the ribs being integrally formed with the protective member.

[0061] In particular, the base component is in direct contact with at least some of the ribs, in particular all of the ribs.

[0062] In particular, the underbody protection is formed so that the at least one protection element comprises at least one metal plate and / or at least one plastic element and / or at least one organo sheet (20).

[0063] When the underbody protection has two or more protection elements, one protection element can be formed as a metal plate and another protection element can be formed as an organo sheet or a plastic element.

[0064] If the protective element is configured as a metal plate, the metal plate can be made, for example, from aluminum or steel.

[0065] Organosheets are understood to be fiber matrix semi-finished products. These consist of fiber woven fabrics or fiber webs embedded in a thermoplastic matrix. This allows for improved thermoforming properties and therefore shorter production times. Furthermore, the bending stiffness of the underbody protection can be improved.

[0066] At least one protective element can have the same plastic as the base element, which allows the protective element to be better connected to the base element, in particular better welded.

[0067] If the protective element is configured as a plastic element, it is preferably made from a thermoplastic and / or thermosetting plastic.

[0068] If the protection element is made as a plastic element, it can be made at least partially as a fiber-reinforced plastic element, which can improve the bending stiffness of the underbody protection.

[0069] If the protective element is made as a plastic element, it can have short and / or long and / or continuous fibers, which can further improve the bending stiffness of the underbody protection.

[0070] The fibers of the plastic member may be formed as glass fibers and / or carbon fibers and / or aramid fibers.

[0071] The plastic parts can be manufactured using mass production molds by pressing methods such as long fiber thermoplastic extrusion presses, glass mat thermoplastic molding presses or injection molding.

[0072] In particular, the underbody protection is designed in such a way that it has a connection flange, at the edge of which it is arranged.

[0073] In particular, the outer lateral borders of the protective element terminate in the region of the connecting flange so that the base component covers the beveled edge of the protective element, thereby improving the properties against side impacts.

[0074] If the protective element has metal or is made of metal, the beveled edges of the protective element are covered with plastic for corrosion protection reasons.Further improved side impact properties are achieved if the rigid part of the underbody protection (i.e., for example, the protective element) terminates flush with, for example, the battery housing.

[0075] The connecting flange is formed as part of the base component, which allows the base component to be easily manufactured and also increases the bending stiffness of the base component.

[0076] The connecting flanges can extend at the edge side in a direction away from the base structural member, in particular in the direction of width and / or length expansion of the base structural member.

[0077] The connecting flange can have an extension in the width direction and / or length direction of the base component in the range of 8 mm to 40 mm, in particular in the range of 10 mm to 18 mm, which allows for a better connection of the underbody protection to the vehicle.

[0078] The connection flange can have a mating surface. The mating surface can be configured to establish a connection with the vehicle or with a vehicle component, such as a traction battery. The connection with the vehicle can be a material-bonded connection. Alternatively or additionally, a mechanical connection can be established using a connecting member. The connecting member can be formed as a screw, a rivet, or other mechanical connecting member.

[0079] The connecting flange may be formed as part of the border edge.

[0080] The connection flange may be formed as a connection flange extending around the periphery of the base component.

[0081] In particular, the protective element is connected to the base component by means of a number of screws which are threaded into a connecting flange.

[0082] In particular, a sealing material is arranged between the protective element and the base component, which may be, for example, a one- or two-component polyurethane adhesive, or a silicone-based adhesive, or an adhesive based on a silane-modified polymer.

[0083] In particular, adhesive tape and / or foam tape and / or transfer tape, which are all in particular acrylic-based, are arranged between the protective element and the base component.

[0084] In particular, the underbody protection is configured in such a way that the first connecting surface of the protection element is connected to the base component by material bonding.

[0085] The materially bonded connection can be achieved, for example, by welding the base component to the first connection surface of the protective component.

[0086] In particular, a first adhesion-promoting layer is applied to the first connecting surface of the protective element.

[0087] By means of the adhesion promoter layer, improved adhesion, in particular improved material bonding connections, can be achieved.

[0088] The adhesion-promoting layer can be a heat-activatable adhesive layer, in particular a film, a lacquer and / or a powder coating, which can be based on a thermoplastic or thermosetting material, thereby achieving a further improved material bond between the support structure and the first and second protective elements, respectively.

[0089] The adhesion promoter layer may have a thickness in the range of 0.02 mm to 3 mm, preferably in the range of 0.03 mm to 1 mm, and more preferably in the range of 0.05 mm to 0.3 mm.

[0090] In particular, the first connecting surface of the protective element is welded to the base component.

[0091] Furthermore, in particular, the first connecting surface of the protective element is microstructured, the microstructure of the first connecting surface being produced, for example, by a laser microstructuring method and / or by sandblasting or corundum blasting and / or by an etching method.

[0092] In particular, the underbody protection is formed in such a way that the hollow space is at least partly filled with foam material.

[0093] The foam material may be formed as a polyurethane foam. The foam material may be formed as an expanded polypropylene or EPP foam.

[0094] In particular, the foam material has a density ranging between 60 g / l and 180 g / l, preferably between 100 g / l and 150 g / l.

[0095] Furthermore, the underbody protection is formed in particular in such a way that the protection element is connected to the base component by means of a foam material.

[0096] An underbody protection that is designed accordingly has a simple design and can be easily manufactured, since only a few work steps are required for its production.

[0097] For example, the base component can have a connecting surface made of polypropylene. Furthermore, the protective component can also have a connecting surface made of polypropylene. The foam material can be formed as EPP foam, as described above. The connecting surface of the base component can be bonded to the EPP foam by a material bond, and the connecting surface of the protective component can be bonded to the EPP foam by a material bond, so that the protective component is connected to the base component using the foam material.

[0098] In particular, the underbody protection comprises a base component formed in a shell shape and configured to at least partially define a storage volume, the storage volume being configured to accommodate battery cells and / or battery modules.

[0099] A correspondingly configured underbody protection has the advantage that the base component combines multiple functions, namely the function of accommodating battery cells and / or battery modules and the function of protecting a vehicle equipped with a drive battery having the above-mentioned underbody protection from damage caused by contact with the ground.

[0100] The problem on which the present invention is based is further solved by a battery housing for a drive battery, the battery housing having an underbody protection part according to one of the above-mentioned embodiments, the battery housing shell of the battery housing being formed as a base component of the underbody protection part.

[0101] The battery housing according to the present invention has the advantage that the battery housing has an improved protection effect against mechanical forces, for example, during a collision. When a mechanical force occurs, for example, during a collision due to dynamic contact with the ground, the protective element of the underbody protection part of the battery housing can deform toward the hollow part of the underbody protection part of the battery housing and, in so doing, can convert the energy generated by the collision into mechanical deformation energy. As a result, the battery housing has an improved protection effect against mechanical forces.

[0102] Furthermore, the battery housing according to the invention has the advantage that, due to the layered structure of the battery housing shell, the tendency of the battery housing to distort upon heat introduction is reduced.

[0103] Furthermore, the battery housing according to the invention has weight advantages over battery housings known from the prior art.

[0104] The problem on which the invention is based is further solved by a traction battery for a motor vehicle, which traction battery has at least one battery cell and / or at least one battery module and the above-mentioned battery housing, wherein the at least one battery cell and / or at least one battery module is arranged in the battery housing.

[0105] A driving battery configured in this manner has the advantage that the battery cells and / or battery modules arranged in the battery housing are better protected from direct mechanical action when a vertical impact is applied to the driving battery due to the improved energy absorption capacity of the battery housing.

[0106] The problem on which the invention is based is further solved by a motor vehicle, in particular an electric vehicle, which is configured according to the above-described embodiment and which is provided with an underbody protection for the motor vehicle, in particular an underbody protection for the driving battery of the motor vehicle.

[0107] Further advantages, details and features of the invention will become apparent from the examples described below. [Brief explanation of the drawings]

[0108] [Figure 1A] 1 shows a schematic cross-sectional view of an underbody protection according to the invention according to a first embodiment; [Figure 1B] 1B shows a detailed view of the connection area between the protection element and the base component of the underbody protection shown in FIG. 1A; [Figure 2] 3 shows a schematic cross-sectional view of an underbody protection according to the invention according to a second embodiment; [Figure 3] 3 shows a schematic cross-sectional view of an underbody protection according to the invention according to a third embodiment. [Figure 4] 4 shows a schematic cross-sectional view of an underbody protection according to the invention according to a fourth embodiment. [Figure 5] 5 shows a schematic cross-sectional view of an underbody protection according to the invention according to a fifth embodiment. [Figure 6] 10 shows a schematic cross-sectional view of an underbody protection according to the invention according to a sixth embodiment. [Figure 7] 10 shows a schematic cross-sectional view of an underbody protection according to the invention according to a seventh embodiment. [Figure 8] 13 shows a schematic cross-sectional view of an underbody protection according to the invention according to an eighth embodiment. [Figure 9] 13 shows a schematic cross-sectional view of a traction battery with underbody protection according to a ninth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0109] In the following description, the same reference numerals represent the same components or features, and therefore, a description of a component made with reference to one figure is valid for the other figures and will not be repeated. Furthermore, individual features described in connection with one embodiment can be used separately in other embodiments.

[0110] Figure 1A shows a schematic cross-sectional view of an underbody protection 1 for a motor vehicle according to a first embodiment of the present invention. The underbody protection 1 comprises at least one base component 10, at least one protection component 20 and at least two ribs 30. In the embodiment shown in Figure 1A, as well as in other embodiments shown in Figures 2 to 9, each underbody protection 1 comprises a plurality of ribs 30 (two or more ribs).

[0111] In the embodiment of the underbody protection 1 shown in Figure 1A, the ribs 30 are integrally formed with the base component 10. Furthermore, the ribs are sandwiched between the protection component 20 and the base component 10, so that a plurality of hollow spaces 40 are formed between the protection component 20 and the underside 12 of the base component 10, the hollow spaces 40 being at least partially defined by the ribs 30. Furthermore, the hollow spaces 40 are defined by the protection component 20.

[0112] In the embodiment of the underbody protection 1 shown in Figure 1A, the protection element 20 is connected to the base component 10 by means of a number of screws 70. As can also be seen in Figure 1B, at least a portion of the screws 70 are threaded into each one of the ribs 30.

[0113] If the protective element 20 is configured as or comprises a plastic element 20 or an organo film 20, the protective element 20 can be connected to the base element 10 by a material bond. For this purpose, the base element 10 can also be made of plastic, or at least the part of the base element 10 that comes into contact with the connecting surface 27 of the protective element 20 can be made of plastic.

[0114] 1A further shows that the underbody protection 1 has a connecting flange 50 arranged on its edge, which closes the intermediate space between the protection element 20 and the base component 10, so that, for example, water cannot penetrate into this intermediate space. Furthermore, the protection element 20 and the base component 10 are in contact with each other in the region of the connecting flange 50 and are in particular connected to each other in the region of the connecting flange 50. For example, in the region of the flange 50, the protection element 20 can be connected to the base component 10 by a material bond and / or by means of a number of screws.

[0115] 2 shows a schematic cross-sectional view of an underbody protection part 1 according to a second embodiment of the invention. The underbody protection part 1 according to the second embodiment is formed in such a way that the hollow part 40 is at least partially filled with a foam material 60.

[0116] The protective element 20 can be connected to the base component 10 using a foam material 60. It is further conceivable that the protective element 20 can be connected to the base component 10 using a number of screws, not shown in Figure 2. Furthermore, the protective element 20 can be connected to the base component 10 by a material bond.

[0117] The remaining structure of the underbody protection part 1 shown in FIG. 2 corresponds to the structure shown in FIG. 1A, so to avoid repetition, please refer to the above description.

[0118] Figure 3 shows a schematic cross-sectional view of an underbody protection part 1 according to a third embodiment of the present invention. The underbody protection part 1 shown in Figure 3 differs from the underbody protection part 1 shown in Figure 1A in that the ribs 30 are not formed integrally with the base component 10 but are formed integrally with the protection part 20. In the embodiment shown in Figure 3, the connection surfaces 27 of the protection part 20 are the end edges of the ribs 30 that are arranged facing the underside 12 of the base component 10.

[0119] Other structures of the underbody protection part 1 shown in FIG. 3 correspond to those of the underbody protection part 1 shown in FIG. 1, so to avoid repetition, please refer to the corresponding above-mentioned descriptions.

[0120] Figure 4 shows a schematic cross-sectional view of an underbody protection 1 according to a fourth embodiment of the present invention. In the underbody protection 1 shown in Figure 4, at least some of the hollow spaces 40 are filled with foam material 60. In the embodiment shown in Figure 4, all of the hollow spaces 40 are filled with foam material.

[0121] The foam material 60 allows the protective element 20 to be connected to the base component 10 by means of said foam material 60. The alternative possibility of connecting the protective element 20 to the base component 10, which has been explained in more detail with reference to Figure 3, can also be realised in the embodiment shown in Figure 4. Thus, the protective element 20 can be connected to the base component 10 by means of a number of screws. Furthermore, the protective element 20 can be connected to the base component 10 by a material bond.

[0122] Other structures of the underbody protection part 1 shown in FIG. 4 correspond to those of the underbody protection part 1 shown in FIG. 3, so to avoid repetition, please refer to the corresponding above-mentioned descriptions.

[0123] Fig. 5 shows a schematic cross-sectional view of an underbody protection part 1 according to a fifth embodiment of the present invention. In the underbody protection part 1 shown in Fig. 5, the protection element 20 has a plastic layer 23 and a protective layer 24 connected to the plastic layer 23. The protective layer 24 is arranged on the outer surface 21 of the protection element 20 opposite to the rib 30 side.

[0124] The plastic layer 23 may comprise a thermoplastic plastic, in particular polypropylene or polyamide. Alternatively, the plastic layer 23 may comprise a thermosetting plastic. The plastic layer 23 may be formed at least in part as a fiber-reinforced plastic layer 24, in which case the fibers may be glass fibers and / or carbon fibers and / or aramid fibers.

[0125] The protective layer 24 can be formed, for example, as an organo sheet 24 or as a metal layer 24 .

[0126] Other structures of the underbody protection part 1 shown in FIG. 5 correspond to those of the underbody protection part 1 shown in FIG. 3, so to avoid repetition, please refer to the corresponding above-mentioned descriptions.

[0127] Fig. 6 shows a schematic cross-sectional view of an underbody protection part 1 according to a sixth embodiment of the present invention. In the underbody protection part 1 shown in Fig. 6, the protection part 20 has a plastic layer 23 and a protective layer 25 connected to the plastic layer 23. Here, the protective layer 25 is arranged on the inner surface 22 of the protection part 20 that faces the rib 30. The protective layer 25, arranged on the inner surface 22 that faces the rib 30, has a plurality of through-openings 26 through which the material of the plastic layer 23 that forms the rib 30 protrudes.

[0128] 6, the plastic layer 23 can also comprise a thermoplastic plastic, in particular polypropylene or polyamide. Alternatively, the plastic layer 23 can comprise a thermosetting plastic. The plastic layer 23 can be formed at least in part as a fiber-reinforced plastic layer 24, in which case the fibers can be glass fibers and / or carbon fibers and / or aramid fibers.

[0129] The protective layer 24 can be formed, for example, as an organo sheet 24 or as a metal layer 24 .

[0130] Other structures of the underbody protection part 1 shown in FIG. 6 correspond to those of the underbody protection part 1 shown in FIG. 3, so to avoid repetition, please refer to the corresponding above-mentioned descriptions.

[0131] Figure 7 shows a schematic cross-sectional view of an underbody protection part 1 according to a seventh embodiment of the present invention. In the underbody protection part 1 shown in Figure 7, at least some of the hollow parts 40 are filled with foam material 60, and in the embodiment shown in Figure 7, all of the hollow parts 40 are filled with foam material 60.

[0132] The foam material 60 allows the protective element 20 to be connected to the base component 10 by means of said foam material 60. Another possibility for connecting the protective element 20 to the base component 10, which has been explained in more detail with reference to Figure 3, can also be realised in the embodiment shown in Figure 7. Thus, the protective element 20 can be connected to the base component 10 by means of a number of screws. Furthermore, the protective element 20 can be connected to the base component 10 by a material bond.

[0133] Other structures of the underbody protection part 1 shown in FIG. 7 correspond to those of the underbody protection part 1 shown in FIG. 5, so to avoid repetition, please refer to the corresponding above-mentioned descriptions.

[0134] Figure 8 shows a schematic cross-sectional view of an underbody protection part 1 according to an eighth embodiment of the present invention. In the underbody protection part 1 shown in Figure 8, the protection element 20 has a first protection layer 24, a second protection layer 25 and a plastic layer 23, which is connected to the two protection layers 24, 25 respectively.

[0135] The first protective layer 24 is disposed on the outer surface 21 of the protective member 20 opposite the rib 30 side. The second protective layer 25 is disposed on the inner surface 22 of the protective member 20 located on the rib 30 side. The second protective layer 25 has a plurality of through openings 26, through which the material of the plastic layer 23 forming the ribs 30 protrudes. The plastic layer 23 is disposed and sandwiched between the first protective layer 24 and the second protective layer 25.

[0136] 8, the plastic layer 23 can also comprise a thermoplastic plastic, in particular polypropylene or polyamide. Alternatively, the plastic layer 23 can comprise a thermosetting plastic. The plastic layer 23 can be at least partly formed as a fiber-reinforced plastic layer 24, in which case the fibers can be glass fibers and / or carbon fibers and / or aramid fibers.

[0137] The first protective layer 24 can be formed, for example, as an organo sheet 24 or as a metal layer 24. The second protective layer 25 can be formed, for example, as an organo sheet 25 or as a metal layer 25.

[0138] Other structures of the underbody protection part 1 shown in FIG. 8 correspond to those of the underbody protection part 1 shown in FIG. 6, so to avoid repetition, please refer to the corresponding above-mentioned descriptions.

[0139] Figure 9 shows a schematic cross-sectional view of a battery housing 90 for a driving battery 80 having an underbody protection part 1 according to a ninth embodiment, in which the battery housing shell 10 of the battery housing 90 is formed as a base component 10 of the underbody protection part 1.

[0140] The rib 30 is formed integrally with the base component 10. Furthermore, the underbody protection 1 has a connecting flange 50 arranged on the edge side.

[0141] The base component 10 is formed in a shell-like shape and at least partially defines an accommodating volume 11. Thus, in the embodiment shown in Fig. 9, the base component 10 is formed as a battery housing shell 10 that is configured to accommodate battery cells 91 and / or battery modules. In the illustrated example, a plurality of battery cells 91 are arranged in the accommodating volume 11.

[0142] Although not shown in Figure 9, the underbody protection 1 can also be configured as shown in Figures 1 to 8, in which case the base component 10 is always configured in a shell-like shape and at least partially defines an accommodation volume 11 configured to accommodate battery cells 91 and / or battery modules. [Explanation of symbols]

[0143] 1 Underbody Protection / Battery Housing Shell 10 Base component / battery housing 11 (Base component) storage volume 12 (of the base component) 20 Protective materials / metal plates / plastic materials / organo sheets 21 (of protective member) outer surface 22 (of protective member) inner surface 23 Plastic Layer / Plastic Sheet / Plastic Plate 24 (First) Protective Layer 25 (Second) Protective Layer 26 (Protective layer) through opening 27 (First) connecting surface of (protective member) 30 Ribs 40 Hollow part 50 Connection flange 60 Foam material / foam layer / foam sheet 70 screws 80 Drive battery 90 Battery Housing 91 Battery Cell / Battery Module

Claims

1. An underbody protection (1) for a motor vehicle, comprising: The underbody protection part (1) - at least one base component (10), at least one protective element (20); - at least two ribs (30); and - said at least two ribs (30) are sandwiched between said protective element (20) and said base component (10); - a plurality of hollows (40) are formed between the protective element (20) and the underside (12) of the base component (10), the hollows (40) being at least partially defined by ribs (30); and - an underbody protection (1), characterized in that said protection element (20) is connected to said base component (10).

2. 2. The underbody protection (1) according to claim 1, characterized in that the protection element (20) has at least one plastic layer (23) and at least one protective layer (24, 25), the protective layers (24, 25) being connected to the plastic layer (23).

3. 3. The underbody protection (1) according to claim 2, characterized in that the at least one protective layer (24) is arranged on an outer surface (21) of the protective element (20) opposite the rib (30).

4. 3. The underbody protection (1) according to claim 2, characterized in that the at least one protective layer (25) is arranged on an inner surface (22) of the protective element (20) that faces the rib (30).

5. - said protective element (20) comprises two protective layers (24, 25) and a plastic layer (23), said plastic layer (23) being connected to each of said two protective layers (24, 25); and The plastic layer (23) is sandwiched between a first protective layer (24) arranged on the outer surface (21) of the protective element (20) opposite to the rib (30) side, and a second protective layer (25) arranged on the inner surface (22) of the protective element (20) located on the rib (30) side. An underbody protection (1) according to claim 1, characterized in that it is

6. 6. An underbody protection part (1) according to claim 4 or 5, characterized in that the protective layer (25) arranged on the inner surface (22) facing the rib (30) has a plurality of through openings (26) protruding beyond the material of the plastic layer (23) forming the rib (30).

7. - said protective element (20) is connected to said base component (10) by means of a number of screws (70); and - at least a part of said screws (70) is threaded into each one of the ribs (30); An underbody protection (1) according to any one of claims 1 to 6, characterized in that it comprises:

8. 8. Underbody protection (1) according to any one of the preceding claims, characterized in that at least a part of the rib (30) is formed integrally with the base component (10).

9. 9. Underbody protection (1) according to any one of claims 1 to 8, characterized in that at least a part of the rib (30) is formed integrally with the protection element (20).

10. 10. An underbody protection part (1) according to any one of claims 1 to 9, characterized in that the at least one protective element (20) comprises at least one metal plate (20) and / or at least one plastic element (20) and / or at least one organo sheet (20).

11. 11. Underbody protection (1) according to any one of claims 1 to 10, characterized in that the underbody protection (1) has a connection flange (50) arranged on the edge side.

12. 12. Underbody protection (1) according to any one of claims 1 to 11, characterized in that the first connecting surface (27) of the protection element (20) is connected to the base component (10) by a material bond.

13. 13. Underbody protection (1) according to any one of claims 1 to 12, characterized in that the hollow space (40) is at least partially filled with a foam material (60).

14. 14. Underbody protection (1) according to claim 13, characterized in that the protection element (20) is connected to the base component (10) by means of the foam material (60).

15. 15. An underbody protection (1) according to any one of claims 1 to 14, characterized in that the base component (10) is formed in a shell shape and at least partially defines an accommodation volume (11) configured to accommodate battery cells (91) and / or battery modules.

16. A battery housing (90) for a drive battery, comprising: A battery housing (90) having an underbody protection part (1) according to any one of claims 1 to 15, characterized in that a battery housing shell (10) of the battery housing is formed as a base component (10) of the underbody protection part (1).

17. A traction battery (80) for a motor vehicle, comprising: A driving battery (80) comprising at least one battery cell (91) and / or at least one battery module and a battery housing (90) according to claim 16, wherein the at least one battery cell (91) and / or the at least one battery module is arranged within the battery housing (90).

18. 16. A motor vehicle, in particular an electric motor vehicle, comprising an underbody protection (1) according to any one of claims 1 to 15, which is attached to the motor vehicle, in particular to a driving battery (80) of said motor vehicle.

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