Underbody protection for a motor vehicle, a motor vehicle equipped with an underbody protection, and a method for manufacturing an underbody protection

Abstract

In an underbody protection portion (1) for an automobile having at least one first protection member (10), a support structure (30) having a plurality of ribs (31), and at least one second protection member (20), the support structure (30) is sandwiched between the first protection member (10) and the second protection member (20), and the first protection member (10) and the second protection member (20) are each connected to the support structure (30), and the ribs (31) extend between the first protection member (10) and the second protection member (20), so that a plurality of hollow portions (2) are formed between the first protection member (10) and the second protection member (20).

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 motor vehicle, in particular an electric vehicle, equipped with an underbody protection, and to a method for manufacturing the underbody protection. [Background technology]

[0002] Various types of underbody protection systems are known in the prior art. In order to absorb high intrusion forces and collision energy when a vehicle dynamically contacts an obstacle, underbody protection is mainly made of heavy steel plates or welded steel modules. Such underbody protection systems increase the total vehicle weight. Furthermore, underbody protection made of steel is more susceptible to corrosion. Summary of the Invention [Problem to be solved by the invention]

[0003] The problem on which the invention is based is to provide an underbody protection which has high stiffness and energy absorption capacity and at the same time is low in weight. [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 claims dependent thereon.

[0005] More specifically, the problem on which the present invention is based is solved by an underbody protection for a motor vehicle, comprising at least one first protection element, a support structure with a plurality of ribs, and at least one second protection element, the support structure being sandwiched between the first protection element and the second protection element, the first protection element and the second protection element being connected to the support structure, and the ribs extending between the first protection element and the second protection element so that a plurality of hollow spaces are formed between the first protection element and the second protection element.

[0006] The underbody protection according to the present invention has the advantage of providing an improved protective effect against mechanical forces, for example, during a collision. When a mechanical force occurs, such as during a collision caused by the vehicle dynamically contacting the ground, the second protection element can deform toward the hollow portion of the support structure and convert the energy generated by the collision into mechanical deformation energy. In this case, the deformation of the second protection element toward the hollow portion of the underbody protection element protects the first protection element from deformation, thereby effectively protecting the vehicle components located above the first protection element. This provides the underbody protection element with an improved protective effect against mechanical forces.

[0007] The underbody protection is designed for motor vehicles, in particular electrically driven vehicles.

[0008] The first protective member and / or the second protective member may also be referred to as a first protective plate and / or a second protective plate.

[0009] According to the feature that the support structure is sandwiched between the first protective member and the second protective member, at least a portion of the support structure is at least partially sandwiched between the first protective member and the second protective member, for example, a rib is sandwiched between the first protective member and the second protective member.

[0010] The first and / or second protective element may be formed as a substantially flat component. A substantially flat component in the sense of the present invention has a first extension direction, a second extension direction and a third extension direction, where the third extension direction is much shorter than the first and second extension directions. The third extension direction may also be referred to as a thickness extension. The first extension direction may also be referred to as a longitudinal extension. The second extension direction may also be referred to as a width extension. All three extension directions are mutually orthogonal.

[0011] The first protective element may have a first connecting surface that may be arranged parallel to a plane spanned by the longitudinal and lateral extents of the first protective element, or in other words, perpendicular to the thickness extent of the first protective element.

[0012] The second protective element may have a second connecting surface that may be arranged parallel to a plane spanned by the longitudinal and lateral extents of the second protective element, or in other words, perpendicular to the thickness extent of the second protective element.

[0013] The support structure may have a base plate. The base plate of the support structure may be formed as a substantially flat component.

[0014] According to the feature that the support structure has a plurality of ribs, it is intended that the support structure has at least two ribs, where a first subset of the ribs can be aligned, for example, parallel to one another, and a second subset of the ribs can be aligned so as to intersect with the first subset of the ribs.

[0015] The support structure may comprise a plastic, in particular a thermoplastic and / or a thermoset plastic.

[0016] The support structure can be at least partially made of fiber-reinforced plastic, which can improve the bending stiffness of the underbody protection.

[0017] The support structure may comprise long and / or continuous fibers, which may further improve the bending stiffness of the underbody protection.

[0018] The fibers of the support structure may be formed as glass fibers and / or carbon fibers and / or aramid fibers.

[0019] According to the feature that the support structure is sandwiched between the first protective element and the second protective element and that the first protective element and the second protective element are connected to the support structure, it is intended that the support structure is first arranged starting from the first protective element and then connected to the first protective element. In particular, the first protective element is connected to the support structure so that the thickness extension of the first protective element extends at least partially parallel to the thickness extension of the base plate of the support structure. The second protective element is arranged on the support structure and connected to the support structure so that the thickness extension of the base plate of the support structure and the thickness extension of the second support structure extend at least partially parallel to each other. In other words, the first protective element and the second protective element are arranged on opposite faces of the support structure and connected to the support structure.

[0020] The ribs can extend between the first protective member and the second protective member such that a plurality of cavities are defined by the first protective member and the base plate of the support structure. Alternatively or additionally, the cavities can be defined by the first protective member and the second protective member.

[0021] The plurality of hollow portions may have a width and / or length extension in the range of 10 mm to 100 mm, preferably in the range of 30 mm to 60 mm.

[0022] The ribs may extend in a regular pattern between the first and second protection elements. The ribs may extend along the longitudinal and / or lateral extent of the base plate of the support structure and may form a regular pattern, thereby improving the bending stiffness of the underbody protection.

[0023] The ribs may have a wall thickness in the range of 1.5 mm to 8 mm, preferably in the range of 2 mm to 4 mm.

[0024] The first protection element and / or the second protection element can partially cover the ribs of the support structure, thereby achieving improved flexibility of the underbody protection.

[0025] Alternatively, the first protection element and / or the second protection element can completely cover the ribs of the support structure, thereby achieving an improved bending stiffness of the underbody protection.

[0026] The first protective member and / or the second protective member can be connected to the support structure using a connecting member. The connecting member can be formed as a screw, a rivet, or other connecting member. For example, a recess with an undercut or a through hole can be formed in the first protective member and / or the second protective member. The material of the support structure can extend into the recess, thereby forming a rivet. Furthermore, the material of the support structure can extend through a through hole, particularly one with a chamfered wall, thereby forming a rivet.

[0027] The support structure can have a connection housing configured to connect the first protective element and / or the second protective element to the support structure with the connecting element. The connection housing can be arranged on the plurality of ribs.

[0028] The underbody protection can include a plurality of first protection members and a plurality of second protection members, thereby achieving improved flexibility of the underbody protection. Among other things, the support structure includes a base plate with a plurality of ribs extending away from the base plate.

[0029] An underbody protection that is designed accordingly has an even improved stability and is very easy to manufacture.

[0030] The ribs extend perpendicularly from the base plate of the support structure in a direction away from the base plate, which makes it possible to achieve a very easy manufacture of the underbody protection.

[0031] The ribs may be integrally connected to the base plate. "Integally connected" refers to two components manufactured from one joined piece. In particular, integrally connected components are connected to each other without any joints.

[0032] In particular, the support structure is formed in the shape of a petri dish.

[0033] An underbody protection that is designed accordingly has an even improved stability and is very easy to manufacture.

[0034] A petri dish-like component in the sense of the present invention has at least one substantially flat portion and at least one edge portion, which may be referred to as a border edge, with a component at least partially defining the flat portion and perpendicular to the flat portion.

[0035] The border may be integrally connected to the base plate.

[0036] The support structure may have a storage volume that is at least partially defined by the base plate and the bounding edge.

[0037] The boundary edge can completely surround the base plate of the support structure, in other words the storage volume is completely defined by the boundary edge in the direction of longitudinal extension and in the direction of width extension of the base plate.

[0038] The support structure may be formed as a unitary component.

[0039] The first protection element is accommodated in the accommodation volume of the support structure, which allows the underbody protection to be easily mounted on the vehicle.

[0040] In particular, the underbody protection has a connection flange arranged on the edge side.

[0041] The connection flange is formed, inter alia, as part of the support structure, which allows the support structure to be easily manufactured and also increases the bending stiffness of the support structure.

[0042] The connection flange can extend, on the edge side, away from the support structure, in particular in the direction of width and / or longitudinal extent of the base plate of the support structure.

[0043] The connecting flange can have an extension in the direction of width and / or length of the base plate of the support structure 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.

[0044] 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 battery for an electric vehicle. 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.

[0045] The connecting flange may be formed as part of the border edge.

[0046] The connection flange may be formed as a connection flange that extends around the periphery of the support structure.

[0047] In particular, the first protective member is formed as a first organic sheet, and / or the second protective member is formed as a second organic sheet.

[0048] Organic sheets are fiber matrix semi-finished products that consist of woven or web-like fibers embedded in a thermoplastic matrix. This allows for improved thermoforming properties and therefore shorter production times. Furthermore, it allows for improved bending stiffness of the underbody protection.

[0049] The first protective element and / or the second protective element can have the same plastic as the support structure, which allows for better connection, and in particular better welding, of the first protective element and / or the second protective element to the support structure.

[0050] The first protective member and / or the second protective member may each have a multi-layer structure. Specifically, the multi-layer structure may have a first layer. The multi-layer structure may have a second layer, in which case the second layer is connected to the first layer. The multi-layer structure may have a third layer, in which the third layer is connected to the second layer such that the second layer is sandwiched between the first and third layers. The multi-layer structure may have a fourth layer, in which the fourth layer is connected to the third layer such that the third layer is sandwiched between the second and fourth layers. The multi-layer structure may have a fifth layer, in which the fifth layer is connected to the fourth layer such that the fourth layer is sandwiched between the third and fifth layers. The multi-layer structure may have a sixth layer, in which the sixth layer is connected to the fifth layer such that the fifth layer is sandwiched between the fourth and sixth layers.

[0051] The multi-layer structure may have a cover layer connected to the first layer such that the first layer is sandwiched between the cover layer and the second layer.

[0052] The first connecting surface of the first protective member can be formed by a first surface of a cover layer of the multilayer structure. The second connecting surface of the second protective member can be formed by a first surface of a cover layer of the multilayer structure. Alternatively, the first connecting surface of the first protective member can be formed by a first surface of a sixth layer of the multilayer structure. The second connecting surface of the second protective member can be formed by a first surface of a sixth layer of the multilayer structure.

[0053] The layers can be connected to one another by material bonding, in particular by welding.

[0054] The cover layer and / or the sixth layer can comprise or be formed of polypropylene and / or polyethylene terephthalate and / or a blend of polypropylene and polyethylene terephthalate. An underbody protection part formed in this way has the advantage that the cover layer and / or the sixth layer do not adhere to the welding mirror when the first protection element and / or the second protection element are connected to the support structure by material bonding. This makes it easier to manufacture the underbody protection part.

[0055] The first layer and / or the second layer and / or the third layer and / or the fourth layer and / or the fifth layer can comprise or be formed from fiber reinforced polypropylene.

[0056] The fibers of the fiber-reinforced polypropylene may be formed as glass fibers and / or aramid fibers and / or carbon fibers.

[0057] The first and / or second and / or third and / or fourth and / or fifth layers may have a fiber content of 50% or more, preferably 60% or more, particularly preferably 70% or more, which corresponds to the volume fraction of the material of the layer.

[0058] According to a preferred embodiment, the first layer and / or the third layer and / or the fifth layer may have a fiber content of 72% and the second layer and / or the fourth layer may have a fiber content of 66%.

[0059] The first layer and / or the second layer and / or the third layer and / or the fourth layer and / or the fifth layer may have a thickness spread in the range from 0.15 mm to 0.3 mm, preferably in the range from 0.17 mm to 0.25 mm, particularly preferably in the range from 0.19 mm to 0.23 mm.

[0060] According to a preferred embodiment, the first layer and / or the third layer and / or the fifth layer may have a thickness spread of 0.195 mm, and the second layer and / or the fourth layer may have a thickness spread of 0.23 mm.

[0061] The cover layer and / or the sixth layer may have a thickness spread in the range of from 0.04 mm to 0.13 mm, preferably in the range of from 0.05 mm to 0.12 mm, particularly preferably in the range of from 0.06 mm to 0.11 mm.

[0062] According to a preferred embodiment, the cover layer may have a thickness spread of 0.065 mm and the sixth layer may have a thickness spread of 0.1 mm.

[0063] The first, third, and fifth layers can have fibers that exhibit a first orientation in the polypropylene material. The second and fourth layers can have fibers that exhibit a second orientation in the polypropylene material. The first orientation can correspond to or be different from the second orientation. In particular, the first orientation is offset 90° from the second orientation.

[0064] The first and / or second protective element may have a thickness extension in the range of 1 to 2 mm, preferably in the range of 1.1 to 1.5 mm, particularly preferably in the range of 1.2 to 1.3 mm. According to a preferred embodiment, the first and / or second protective element may have a thickness extension of 1.21 mm.

[0065] In particular, the first protective element is formed as a first metal sheet and / or the second protective element is formed as a second metal sheet.

[0066] A protective element configured as a metal sheet has improved isotropic mechanical and thermal properties, which makes it possible to improve the isotropic properties of the underbody protection in particular.

[0067] The first metal sheet and / or the second metal sheet may comprise a steel alloy and / or an aluminum alloy.

[0068] The first and / or second protective element can be partially or completely surrounded by the support structure, in particular by the plastic material of the support structure, which can provide better protection of the first and / or second protective element against corrosion.

[0069] The first protective element can partially protrude into the connection flange, in other words, can be partially surrounded by the material of the connection flange, which increases the bending stiffness of the underbody protection, particularly in the region of the connection flange.

[0070] In particular, the first protective element and / or the second protective element may have a wall thickness in the range from 0.1 mm to 6 mm, preferably in the range from 0.5 mm to 4 mm, particularly preferably in the range from 1 mm to 3 mm.

[0071] The inventor has surprisingly discovered that even when the protective element is made relatively thin, the protective effect of the underbody protection element against mechanical influences is significantly improved compared to underbody protection devices known from the prior art, and at the same time the weight is reduced.

[0072] In particular, the support structure is formed as a plastic component, in particular as a fiber-reinforced plastic component.

[0073] A correspondingly designed underbody protection also has improved stability and is very easy to manufacture: the support structure can be easily manufactured by injection molding, thermoforming and / or extrusion and / or compression molding, in particular using mass production molds.

[0074] The support structure may comprise a thermoplastic plastic, especially polypropylene or polyamide.

[0075] Alternatively, the support structure may comprise a thermosetting plastic.

[0076] In particular, the support structure has a thickness extension in the range of 5 mm to 25 mm, preferably in the range of 8 mm to 20 mm, more preferably in the range of 10 mm to 16 mm.

[0077] This allows the weight of the underbody structure to be further reduced and the efficiency of motor vehicles with correspondingly designed underbody protection to be further increased.

[0078] In particular, the first connecting surface of the first protective element is connected to the support structure by a microform bond, and / or the second connecting surface of the second protective element is connected to the support structure by a microform bond.

[0079] A correspondingly shaped underbody protection is particularly simple, since it can be produced at least partially using series production methods. Furthermore, a correspondingly shaped underbody protection has a further improved stability.

[0080] A microform connection in the sense of the present invention is understood to mean a form connection between two components in which one component is at least partially engaged from the back by the other component at multiple points. This allows for an improved form connection due to increased connection forces. Furthermore, this allows for a better connection of two components made of different materials, such as plastic and metal, to one another.

[0081] In particular, the first connecting surface and / or the second connecting surface has a micro-surface structure.

[0082] The micro-surface structure of the first connecting surface and / or the second connecting surface is produced, for example, by a laser microstructuring method and / or by sandblasting or corundum blasting and / or by an etching method.

[0083] In particular, the first connecting surface of the first protective element is connected to the support structure by a material bond, and / or the second connecting surface of the second protective element is connected to the support structure by a material bond.

[0084] A materially bonded connection can be achieved, for example, by welding and / or gluing the support structure to the first connecting surface and / or the second connecting surface.

[0085] In particular, a first adhesion promoter layer is applied to the first connecting surface and / or a second adhesion promoter layer is applied to the second connecting surface.

[0086] By means of the adhesion promoter layer, improved adhesion, in particular improved material bonding connections, can be achieved.

[0087] 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.

[0088] 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.

[0089] In particular, the underbody protection is configured in such a way that the hollow space is at least partially filled with foam material.

[0090] The underbody protection thus configured has the advantage that, in the event of a mechanical action, such as a collision resulting from dynamic contact of the vehicle with the ground, the second connecting element deforms toward the hollow portion of the support structure that is at least partially filled with foam material, thereby converting the energy generated by the collision into mechanical deformation energy. In this case, the first protective element is protected from deformation due to the deformation of the second protective element toward the hollow portion of the underbody protection that is at least partially filled with foam material, thereby effectively protecting the vehicle components located above the first protective element. The foam material in the hollow portion additionally absorbs the energy generated by the collision. This further improves the underbody protection's protection against mechanical action.

[0091] The foam material may be formed as a polyurethane foam. The foam material may be formed as an expanded polypropylene or EPP foam.

[0092] 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.

[0093] Furthermore, the underbody protection is formed in particular in such a way that the first protection element is additionally connected to the second protection element by means of a foam material.

[0094] The advantage of an underbody protection part formed in this way is that the bending stiffness of the underbody protection part is further improved.

[0095] For example, a portion of the first connecting surface of the first protective element can comprise or be made of polypropylene, a portion of the second connecting surface of the second protective element can comprise or be made of polypropylene, and the first and second protective elements can each be connected by material bonding to the portion of the connecting surface comprising polypropylene with a foam material formed as EPP foam, so that the first protective element is connected to the second protective element using the foam material.

[0096] Alternatively, the first protective element can additionally be connected to the base plate by means of a foam material, in particular by means of a material bond to the base plate.

[0097] Again alternatively, the first protective element and / or the second protective element can be connected to the foam material by microfeature bonding.

[0098] The problem on which the invention is based is further solved by a motor vehicle, in particular an electric motor vehicle, which is provided with an underbody protection as described above, which is fastened to the underbody of the motor vehicle, in particular to the electric vehicle battery of the motor vehicle.

[0099] The problem on which the invention is based is furthermore solved by a method for manufacturing an underbody protection as described above, which method comprises the following method steps: - manufacturing a support structure, - inserting a first protective member into a first joining tool; - inserting the support structure into a first joining tool; - connecting the first protective member to a support structure; - inserting a second protective member into the first joining tool or the second joining tool; - inserting the support structure into a second joining tool; - connecting the second protective member to the support structure; It has.

[0100] The support structure can be manufactured by injection molding, thermoforming, or extrusion, or alternatively by pressing using a thermosetting sheet-molding compound (SMC).

[0101] The connection of the first protective element and / or the second protective element to the support structure can be made by welding. Alternatively or additionally, the connection can be made by screwing, riveting or clamping.

[0102] The manufacturing of the support structure and the insertion of the first protective element can be performed in one step, i.e., the first protective element can be inserted into a tool first, and then the support structure can be manufactured on the first protective element in the same tool by injection molding and / or crimping onto the first protective element, thereby achieving a good material-bonded connection of the support structure to the first protective element.

[0103] The manufacturing of the support structure and the insertion of the second protective element can be performed in one step, i.e., the second protective element can be inserted into a tool first, and then the support structure can be manufactured on the second protective element in the same tool by injection molding and / or crimping onto the second protective element, thereby achieving a good material-bonded connection of the support structure to the second protective element.

[0104] Further advantages, details and features of the invention will become apparent from the examples described below. [Brief explanation of the drawings]

[0105] [Figure 1] 1 shows a schematic cross-sectional view of an underbody protection according to the invention according to a first embodiment; [Figure 2] 1 shows a schematic perspective cross-sectional view of an underbody protection according to the invention according to a first embodiment; [Figure 3] 1 shows a perspective view of an underbody protection according to the invention according to a first embodiment; [Figure 4] 1 shows a perspective view of a support structure for an underbody protection according to the invention, according to a second embodiment; [Figure 5] 3 shows a schematic cross-sectional view of an underbody protection according to the invention according to a third embodiment. [Figure 6] 4 shows a schematic cross-sectional view of an underbody protection according to the invention according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0106] 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.

[0107] 1 shows in cross section a first embodiment of an underbody protection 1 according to the invention for a motor vehicle. The underbody protection 1 comprises a first protection element 10, a second protection element 20, and a support structure 30 sandwiched between the first protection element 10 and the second protection element 20. The first protection element 10 and the second protection element 20 are connected to the support structure 30 on two opposite sides of the support structure 30.

[0108] The support structure 30 has a plurality of ribs 31 that extend vertically away from a base plate 32 of the support structure 30. The plurality of ribs 31 also extend between the first protective member 10 and the second protective member 20, thereby forming a plurality of hollow portions 2 between the first protective member 10 and the second protective member 20.

[0109] A plurality of ribs 31 are integrally connected to the support structure 30. The plurality of ribs 31 extend in the widthwise and lengthwise directions of the support structure 30 and form a regular pattern.

[0110] The first protective element 10 has a first connecting surface 11, and the second protective element 20 has a second connecting surface 21. The first protective element 10 is connected to a rib 31 of the support structure 30 using the first connecting surface 11. The second protective element 20 is connected to a base plate 32 of the support structure 30 using the second connecting surface 21.

[0111] The underbody protection 1 further comprises a connection flange 33 arranged on the edge side. The connection flange 33 is integrally connected to the support structure 30. The connection flange 33 extends away from the support structure 30 in the direction of longitudinal and widthwise extension of the base plate 32. The connection flange 33 is formed as a connection flange 33 extending around the periphery of the support structure 30.

[0112] The support structure 30 is formed in the shape of a petri dish. The support structure 30 has a boundary edge 34. The boundary edge 34 and the base plate 32 partially define a storage volume 40.

[0113] The first protective member 10 is accommodated in an accommodation volume 40 of the support structure 30 .

[0114] In the assembly position of the underbody protection part 1, the second protection element 20 is arranged first, followed by the support structure 30, and then the first protection element 10, starting from the base part. This means that if a mechanical action occurs, for example due to a collision resulting from contact of a vehicle equipped with the underbody protection part 1, the second protection element 20 can deform towards the hollow part 2 of the support structure 30. This allows the energy of the collision to be converted into mechanical deformation energy. This therefore provides better protection for the vehicle components that are arranged above the underbody protection part 1, starting from the base part.

[0115] 2 shows a perspective cross-sectional view of the underbody protection part 1 according to the first embodiment. The border edge 34 has a higher extension in the extension direction of the rib 31 than the rib 31. This allows the first protection element 10 to deform additionally in a collision without hitting vehicle components, thereby absorbing a larger amount of mechanical deformation energy.

[0116] 3 shows a perspective view of the underbody protection 1 according to the first embodiment. The first protection element 10 partially covers the ribs 31 of the support structure 30. This improves the flexibility of the underbody protection.

[0117] 4 shows a perspective view of the support structure 30 of a second embodiment of the underbody protection 1. The support structure 30 has connection receiving portions 35 for receiving connecting elements, whereby the first protection element 10 and / or the second protection element 20 can be connected to the support structure by means of connecting elements such as, for example, screws or rivets.

[0118] 5 shows a cross-sectional view of a third embodiment of an underbody protection part 1 for a motor vehicle. The first protection element 10 partially protrudes into the connection flange 33 of the support structure 30, so that the first connection surface 11 of the first protection element 10 is connected to both the plurality of ribs 31 and the connection flange 33.

[0119] This allows the bending rigidity of the underbody protection portion 1 to be further improved.

[0120] Figure 6 shows a fourth embodiment of an underbody protection part 1 for a motor vehicle in a cross-section. The hollow part 2 is filled with a foam material 3. The first protection element 10 is connected to a base plate 32 of a support structure 30 by means of the foam material 3. The first protection element 10 can be connected to the foam material 3 by a micro-profile bond. The base plate 32 can be connected to the foam material 3 by a material bond. [Explanation of symbols]

[0121] 1 Underbody protection 2. Hollow section (underbody protection) 3. Foam materials 10 First protective member / organic sheet / metal sheet 11 (first protective member) first connecting surface 20 Second protective member / organic sheet / metal sheet 21 (of the second protective member) second connecting surface 30 Support structure / plastic components 31 Rib (of supporting structure) 32 (support structure) base plate 33 Connection flange 34 Boundary Edge 35 Connection housing 40 Capacity

Claims

1. An underbody protection part (1) for a motor vehicle, The underbody protection part (1) at least one first protective element (10), a support structure (30) provided with a plurality of ribs (31); at least one second protective element (20), and - the support structure (30) is arranged sandwiched between the first protective element (10) and the second protective element (20), and the first protective element (10) and the second protective element (20) are each connected to the support structure (30); - an underbody protection part (1), wherein the ribs (31) extend between the first protection part (10) and the second protection part (20), so that a plurality of hollow parts (2) are formed between the first protection part (10) and the second protection part (20).

2. 2. The underbody protection (1) according to claim 1, characterized in that the support structure (30) has a base plate (32) and the plurality of ribs (31) extend in a direction away from the base plate (32).

3. 3. Underbody protection (1) according to claim 1 or 2, characterized in that the support structure (30) is formed in the shape of a petri dish.

4. 4. The underbody protection (1) according to any one of claims 1 to 3, characterized in that the underbody protection (1) has a connection flange (33) arranged on the edge side.

5. 5. An underbody protection part (1) according to claim 1, characterized in that the first protection element (10) is formed as a first organic sheet (10) and / or the second protection element (20) is formed as a second organic sheet (20).

6. 6. An underbody protection part (1) according to any one of claims 1 to 5, characterized in that the first protection element (10) is formed as a first metal sheet (10) and / or the second protection element (20) is formed as a second metal sheet (20).

7. 7. Underbody protection (1) according to any one of claims 1 to 6, characterized in that the first protective element (10) and / or the second protective element (20) have a wall thickness in the range of 0.1 mm to 6 mm, preferably in the range of 0.5 mm to 4 mm, particularly preferably in the range of 1 mm to 3 mm.

8. 8. Underbody protection (1) according to any one of claims 1 to 7, characterized in that the support structure (30) is formed as a plastic component (30), in particular as a fiber-reinforced plastic component (30).

9. 9. Underbody protection (1) according to any one of claims 1 to 8, characterized in that the support structure (30) has a thickness extension in the range of 5 mm to 25 mm, preferably in the range of 8 mm to 20 mm, more preferably in the range of 10 mm to 16 mm.

10. 10. An underbody protection part (1) according to any one of claims 1 to 9, characterized in that a first connecting surface (11) of the first protection element (10) is connected to the support structure (30) by a microform bond and / or a second connecting surface (21) of the second protection element (20) is connected to the support structure (30) by a microform bond.

11. 11. Underbody protection (1) according to claim 10, characterized in that the first connecting surface (11) and / or the second connecting surface (21) has a micro-surface structure.

12. 12. An underbody protection part (1) according to any one of claims 1 to 11, characterized in that a first connecting surface (11) of the first protection element (10) is connected to the support structure (30) by a material bond and / or a second connecting surface (21) of the second protection element (20) is connected to the support structure (30) by a material bond.

13. 13. The underbody protection (1) according to claim 12, characterized in that the first connection surface (11) is provided with a first adhesion-promoting layer and / or the second connection surface (21) is provided with a second adhesion-promoting layer.

14. 14. Underbody protection (1) according to any one of the preceding claims, characterized in that the hollow space (2) is at least partly filled with a foam material (3).

15. 15. A motor vehicle, in particular an electric motor vehicle, comprising an underbody protection (1) according to any one of claims 1 to 14, attached to the motor vehicle, in particular to an electric vehicle battery of the motor vehicle.

16. A method for manufacturing an underbody protection (1) comprising the following steps: - manufacturing the support structure (30), - inserting the first protective element (10) into a first joining tool; - inserting said support structure (30) into said first joining tool, - connecting said first protective element (10) to said support structure (30); - inserting a second protective element (20) into said first joining tool or into said second joining tool, - inserting said support structure (30) into said second joining tool, - connecting said second protective element (20) to said support structure (30); 10. A method comprising:

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