Automobile bottom guard plate

Abstract

The utility model relates to the technical field of automobiles, in particular to an automobile bottom protection plate which comprises a buffer layer and a main body structure, and the first surface of the buffer layer is connected with a protected part; the main body structure is connected with the second surface of the buffer layer and covers the second surface of the buffer layer, the buffer layer is located in the middle of the main body structure, and the edge of the face, making contact with the second surface, of the main body structure is exposed; the main body structure comprises a first composite material layer, a first dielectric layer, a supporting layer, a second dielectric layer and a second composite material layer which are stacked, and the second surface is connected with the first composite material layer. By means of the design, the main body structure can be prevented from colliding with the protected part, namely the battery to generate abnormal sound and even damage the battery when the main body structure is impacted, and meanwhile it is guaranteed that the main body structure is stably installed.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more particularly to an automotive underbody protection plate. Background Technology

[0002] As a core component of electric vehicles, the battery is typically located under the vehicle's chassis. To prevent the battery from being impacted or scratched during vehicle operation, a protective plate is often added to the bottom of the battery.

[0003] Currently, the fiber-reinforced resin material layer of the bottom protector is usually in direct contact with the bottom of the battery. When subjected to impact, it is prone to making abnormal noises or even damaging the battery structure. In addition, during the driving process, uneven road surfaces, stone impacts, and other reasons can damage the battery bottom protector, thereby damaging the battery. Therefore, there is an urgent need for a bottom protector that can ensure a stable connection with the bottom of the battery and provide a buffering effect for the battery structure. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides an automotive underbody protection plate that provides cushioning while ensuring stable installation.

[0005] According to some embodiments, this application provides an automotive underbody protection plate, which includes:

[0006] A buffer layer, wherein the first surface of the buffer layer is connected to the protected component;

[0007] The main structure is connected to the second surface of the buffer layer, the main structure covers the second surface of the buffer layer, and the buffer layer is located in the middle of the main structure, with the edge of the side of the main structure that contacts the second surface exposed;

[0008] The main structure includes a first composite material layer, a first dielectric layer, a support layer, a second dielectric layer, and a second composite material layer stacked together, with the second surface connected to the first composite material layer.

[0009] In some embodiments of this application, the buffer layer includes a plurality of buffer units, which are evenly arranged on the first composite material layer.

[0010] In some embodiments of this application, the shapes of the first dielectric layer and the second dielectric layer are adapted to the shape of the support layer, the shapes of the first composite material layer and the second composite material layer are adapted to each other, and the projections of the first composite material layer and the second composite material layer on the plane where the first surface is located cover the projections of the support layer, the first dielectric layer and the second dielectric layer on the plane where the first surface is located.

[0011] In some embodiments of this application, the main structure further includes a plurality of pads, the thickness of which is adapted to the thickness of the support layer, the pads being disposed on the outer periphery of the support layer, and the pads being disposed between the first composite material layer and the second composite material layer.

[0012] In some embodiments of this application, the first composite material layer includes at least one layer of fiber-reinforced resin material, and the second composite material layer includes at least one layer of fiber-reinforced resin material.

[0013] In some embodiments of this application, the first composite material layer includes multiple layers of first fiber-reinforced resin material laid out in an alternating manner, wherein the fiber extension directions in two adjacent layers of the first fiber-reinforced resin material are different; the second composite material layer includes multiple layers of second fiber-reinforced resin material laid out in an alternating manner, wherein the fiber extension directions in two adjacent layers of the second fiber-reinforced resin material are different.

[0014] In some embodiments of this application, the vehicle underbody protection plate further includes a functional coating disposed on the side surface of the second composite material layer opposite to the second medium layer, and the functional coating covers the second composite material layer.

[0015] In some embodiments of this application, the functional coating is fixedly connected to the second composite material layer by spraying or rolling.

[0016] In some embodiments of this application, the functional coating includes at least one of a polyurea material layer, a polymer nanomaterial layer, a flame-retardant material layer, and an anti-ultraviolet layer.

[0017] In some embodiments of this application, the support layer is provided with at least one through hole, and the first composite material layer and the second composite material layer are connected through at least one of the through holes.

[0018] The automotive underbody protection plate provided in this application can achieve the following beneficial technical effects:

[0019] The automotive underbody protection plate provided in this application provides a buffer layer between the main structure and the protected component. The buffer layer is located in the middle of the main structure, which ensures that the edge of the main structure can be stably connected to the protected component. At the same time, it can provide cushioning when the main structure is impacted, ensuring that the main structure does not collide with the protected component and be damaged. In addition, the first composite material layer is connected to the support layer through the first medium layer, and the second composite material layer is connected to the support layer through the second medium layer, which reduces the occurrence of delamination of the main structure. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present application, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0021] Figure 1 This is a cross-sectional view of an embodiment of a car underbody protection plate shown in this application;

[0022] Figure 2 This is a top view of an embodiment of a vehicle underbody protection plate shown in this application;

[0023] Figure 3 This is a top view of another vehicle underbody protection plate shown in another embodiment of this application.

[0024] Figure label:

[0025] 100. Buffer layer; 110. Buffer unit;

[0026] 210, First composite material layer; 2110, First fiber-reinforced resin material layer; 220, First dielectric layer; 230, Support layer; 240, Second dielectric layer; 250, Second composite material layer; 2510, Second fiber-reinforced resin material layer; 260, Pad strip;

[0027] 300. Functional coating. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0029] Current underbody protection plates typically come into direct contact with the bottom of the battery during installation. When the plate is impacted, it can easily collide with the battery bottom, causing abnormal noises and even damaging the battery structure. Therefore, there is an urgent need for an automotive underbody protection plate that can provide cushioning for the battery structure without affecting the stable installation between the plate and the battery.

[0030] To address the aforementioned issues, this application provides an automotive underbody protection plate. By setting a buffer layer between the main structure and the protected component, and with the buffer layer positioned in the middle of the main structure, it ensures that the edges of the main structure can be stably connected to the protected component. Simultaneously, it provides cushioning when the main structure is subjected to impact, preventing damage caused by collision between the main structure and the protected component. Furthermore, the first composite material layer is connected to the support layer through a first medium layer, and the second composite material layer is connected to the support layer through a second medium layer, reducing the occurrence of delamination in the main structure.

[0031] The following detailed description of the vehicle underbody protection plate provided in accordance with this application is provided in conjunction with the accompanying drawings.

[0032] An exemplary embodiment of this application provides an automotive underbody protection plate, such as... Figure 1 As shown, the car underbody protection plate includes a buffer layer 100 and a main structure. The buffer layer 100 is installed between the main structure and the protected component, namely the bottom of the battery. The first surface of the buffer layer 100 is connected to the protected component, and the second surface of the buffer layer 100 is connected to the third surface of the main structure. The first and second surfaces are two surfaces perpendicular to the thickness direction of the buffer layer 100. The buffer layer 100 is located in the middle of the main structure, and the edge of the third surface of the main structure is exposed, meaning that the buffer layer 100 is not located at the edge of the third surface.

[0033] In the direction from near the buffer layer 100 to away from the buffer layer 100, the main structure includes a first composite material layer 210, a first medium layer 220, a support layer 230, a second medium layer 240, and a second composite material layer 250 stacked sequentially, with the first composite layer connected to the second surface of the buffer layer 100.

[0034] By setting a buffer layer 100 between the main structure and the protected component, and placing the buffer layer 100 in the middle of the main structure, it is ensured that the edge of the main structure can be stably connected to the protected component. At the same time, when the main structure is subjected to impact, it can provide cushioning to ensure that the main structure will not collide with the protected component and cause damage to the protected component. In addition, a support layer 230 is set to provide support strength for the main structure, and the composite material layer increases the wear resistance and corrosion resistance of the main structure. The first composite material layer 210 is connected to the support layer 230 through the first medium layer 220, and the second composite material layer 250 is connected to the support layer 230 through the second medium layer 240, which further reduces the occurrence of delamination in the main structure.

[0035] In some embodiments, such as Figure 2 and Figure 3As shown, the buffer layer 100 includes a plurality of buffer units 110 uniformly arranged on the first composite material layer 210. The buffer units 110 can be made of porous materials, such as foamed materials or needle-punched nonwoven fabrics. Needle-punched nonwoven fabrics are a type of nonwoven fabric made from polyester or polypropylene raw materials, and are formed by multiple needle punching processes followed by appropriate hot-pressing. They possess good tensile strength, tear strength, moisture-proof, and flame-retardant properties. The buffer units 110 are configured, for example, as shown in the diagram. Figure 2 The cylindrical structure shown can also be configured as follows: Figure 3 The cuboid structure shown can be configured by those skilled in the art according to actual needs. In addition, the buffer layer 100 can also be configured as an integral layer structure, that is, it only includes a cuboid buffer unit 110. All of these are within the protection scope of this application and will not be described in detail here.

[0036] In some embodiments, such as Figure 1 As shown, the shapes of the first dielectric layer 220 and the second dielectric layer 240 are adapted to the shape of the support layer 230. Here, adaptation means that the area of ​​the first dielectric layer 220 and the second dielectric layer 240 is equal to or slightly larger than that of the support layer 230. The shapes of the first composite material layer 210 and the second composite material layer 250 are adapted to each other. Here, adaptation means that the shapes and areas of the first composite material layer 210 and the second composite material layer 250 are approximately the same. The projections of the first composite material layer 210 and the second composite material layer 250 on the plane where the first surface is located both cover the projections of the support layer 230, the first dielectric layer 220 and the second dielectric layer 240 on the plane where the first surface is located.

[0037] In this embodiment, by setting the area of ​​the first composite material layer 210 and the second composite material layer 250 to be larger than the area of ​​the support layer 230, the first composite material layer 210 and the second composite material layer 250 can cover the side of the support layer 230, thus preventing the support layer 230 from being exposed to the air and causing corrosion, aging, etc.

[0038] It should be noted that the first dielectric layer 220 and the second dielectric layer 240 can be adhesive materials, such as adhesive backing, which can make the connection between the support layer 230 and the first composite material layer 210 and the second composite material layer 250 more stable; the first dielectric layer 220 and the second dielectric layer 240 can also be films with other functions or materials, such as films formed on the surface of the support layer 230 by soaking the support layer 230 with a silane coupling agent, which can improve the interfacial bonding performance of the support layer 230 and prevent its surface from oxidizing.

[0039] In some embodiments, continue to refer to Figure 1The main structure also includes a pad strip 260, the thickness of which is adapted to the thickness of the support layer 230. Here, adaptation means that the thickness of the pad strip 260 and the support layer 230 are equal or the thickness of the pad strip 260 is slightly less than or slightly greater than the thickness of the support layer 230. The pad strip 260 is disposed on the outer periphery of the support layer 230 and is disposed between the first composite material layer 210 and the second composite material layer 250.

[0040] In this embodiment, the first dielectric layer 220 and the second dielectric layer 240 also cover both sides of the pad strip 260, that is, the two surfaces of the pad strip 260 perpendicular to the thickness direction are connected to the first dielectric layer 220 and the second dielectric layer 240 respectively. Therefore, the thickness of the pad strip 260 is approximately equal to the thickness of the support layer 230. In other embodiments, the first dielectric layer 220 and the second dielectric layer 240 may only cover the support layer 230 and not the pad strip 260. That is, the two surfaces of the pad strip 260 perpendicular to the thickness direction are connected to the first composite material layer 210 and the second composite material layer 250 respectively. In this case, the thickness of the pad strip 260 should be adapted to the total thickness of the support layer 230, the first dielectric layer 220, and the second dielectric layer 240.

[0041] By setting pads 260 around the support layer 230, the thickness difference caused by the support layer 230 when connecting the edges of the first composite material layer 210 and the second composite material layer 250 is offset. This thickness difference will cause the edges of the main structure to be misaligned when the mold is closed, affecting the overall performance of the main structure.

[0042] In some embodiments, continue to refer to Figure 1 The first composite material layer 210 includes at least one layer of fiber-reinforced resin material, the second composite material layer 250 includes at least one layer of fiber-reinforced resin material, and the pad strip 260 is made of fiber-reinforced resin material.

[0043] The first composite material layer 210 and the second composite material layer 250, which are composed of multi-layer fiber-reinforced resin materials, can improve the structural strength of the bottom protective plate. The pad strip 260 can be made of the same material as the first composite material layer 210 and the second composite material layer 250. The pad strip 260 can also be made of a different material than the first composite material layer 210 and the second composite material layer 250, such as plastic. Flame retardant materials can also be added to the pad strip 260 to achieve a certain fireproof effect.

[0044] In some embodiments, continue to refer to Figure 1The first composite material layer 210 includes multiple layers of first fiber reinforced resin material 2110 laid out in an alternating manner, wherein the fiber extension directions of two adjacent layers of first fiber reinforced resin material 2110 are different; the second composite material layer 250 includes multiple layers of second fiber reinforced resin material 2510 laid out in an alternating manner, wherein the fiber extension directions of two adjacent layers of second fiber reinforced resin material 2510 are different.

[0045] In this embodiment, the first composite material layer 210 includes three layers of first fiber-reinforced resin material 2110 laid in an alternating manner, and the second composite material layer 250 includes three layers of second fiber-reinforced resin material 2510 laid in an alternating manner. The first fiber-reinforced resin material layer 2110 and the second fiber-reinforced resin material layer 2510 can be prepreg tapes of continuous fibers, that is, the fibers in each layer of the first fiber-reinforced resin material layer 2110 or each layer of the second fiber-reinforced resin material layer 2510 extend in the same direction. The alternating laying means that the fibers in two adjacent layers are at an angle of, for example, 0°, 30°, 45°, 75°, 90° or 120°.

[0046] This design ensures the structural strength of the first composite material layer 210 and the second composite material layer 250 in multiple directions, providing better protection for the battery structure.

[0047] In some embodiments, such as Figure 1 As shown, the materials of the multi-layered first fiber-reinforced resin material layers 2110 can be the same, for example, all of them are glass fiber reinforced polypropylene fiber-reinforced resin materials. The materials of the multi-layered first fiber-reinforced resin material layers 2110 can also be set to be different. For example, one fiber-reinforced resin material layer is made of carbon fiber reinforced polypropylene resin material, and the other two layers are made of glass fiber reinforced polypropylene fiber-reinforced resin material. Those skilled in the art can set it according to actual needs. Such a design can combine the advantages of multiple materials and improve the overall performance of the first composite material layer 210. The second composite material layer 250 can also be set in the same way, which will not be described in detail here.

[0048] In some embodiments, such as Figure 1 As shown, the vehicle underbody protection plate also includes a functional coating 300, which is disposed on the side surface of the second composite material layer 250 facing away from the second medium layer 240. The functional coating 300 covers the second composite material layer 250, that is, the area of ​​the functional coating 300 is at least equal to the area of ​​the second composite material layer 250.

[0049] By setting a functional coating 300, the thickness of which is generally 0.2-3mm, the performance of the bottom guard plate can be significantly improved with minimal impact on the overall thickness of the bottom guard plate.

[0050] In some embodiments, such as Figure 1 As shown, the functional coating 300 can be fixedly connected to the second composite material layer 250 by spraying or roll forming. The spraying equipment for spraying the functional coating 300 includes multiple conveyor rollers and a spraying device. The multiple conveyor rollers form a conveying device for the substrate, and the spraying device is positioned directly above the conveyor rollers. By controlling the conveying speed of the conveyor rollers and the spraying speed of the spraying device, the functional coating 300 is sprayed during the conveying process. Roll forming involves the coating being laid up and then fed into a press along with other layers. After heating, cooling, and finishing, the automotive underbody protection plate is obtained.

[0051] In some embodiments, such as Figure 1 As shown, the functional coating 300 may consist of a single functional material layer or multiple functional material layers. The functional coating 300 includes at least one of a polyurea material layer, a polymer nanomaterial layer, a flame-retardant material layer, and an anti-UV layer. The polyurea material has high tensile strength and good flexibility, with an elongation rate up to 1000%. It can transform from a rubbery state to a glassy state with increasing strain rate over a wide strain rate range, consuming a large amount of energy during deformation. Therefore, the polyurea material layer can provide the bottom plate with impact resistance and abrasion resistance. Those skilled in the art have experimentally determined that when the functional coating 300 is a polyurea material layer, the thickness of the polyurea material layer is positively correlated with the overall impact resistance of the bottom plate (i.e., the indentation depth of the contact surface at the bottom of the bottom plate when impacted). The polymer nanomaterial layer, for example, is silicon carbide or silicon dioxide, and has good scratch resistance.

[0052] In some embodiments, such as Figure 1 As shown, the support layer 230 is provided with at least one through hole, and the first composite material layer 210 and the second composite material layer 250 are connected through at least one through hole, which ensures that the connection between the composite material layers above and below the support layer 230 is more stable and avoids the occurrence of delamination.

[0053] The manufacturing process of the aforementioned automotive underbody protection plate is as follows:

[0054] Two layup devices are used to simultaneously lay up a multilayer first fiber reinforced resin material layer 2110 and a multilayer second fiber reinforced resin material layer 2510, respectively. After heating and rolling, the layers are cooled to obtain a first composite material layer 210 and a second composite material layer 250.

[0055] The functional coating 300 can be configured in two ways, and those skilled in the art can choose between the following two configuration methods depending on the type of functional coating 300:

[0056] Method 1: The second composite material layer 250, the second medium layer 240, the support layer 230 and the pad strip 260, the first medium layer 220 and the first composite material layer 210 are sequentially laid up, heated and rolled, and then cooled to obtain the main structure. A functional coating 300 is sprayed onto one side surface of the main structure using a spraying device, and cooled and cured during the conveying process. Finally, a buffer layer 100 is bonded to the other side surface of the main structure, and the bottom protective plate is completed.

[0057] Method 2: Lay out the first composite material layer 210, the first medium layer 220, the support layer 230, the pad strip 260, the second medium layer 240, the second composite material layer 250 and the functional coating 300 in sequence, heat and roll press and then cool and cure. Finally, the buffer layer 100 is bonded to one side surface of the first composite material layer 210, and the bottom protection plate is processed.

[0058] The automotive underbody protection plate provided in this application features a buffer layer 100 positioned between the main structure and the protected component. This buffer layer 100 is located in the center of the main structure, ensuring a stable connection between the edges of the main structure and the protected component. Simultaneously, it provides cushioning when the main structure is impacted, preventing damage to the protected component from collision. A support layer 230 provides structural strength to the main structure, while composite material layers increase its wear and corrosion resistance. The first composite material layer 210 is connected to the support layer 230 via a first dielectric layer 220, and the second composite material layer 250 is connected to the support layer 230 via a second dielectric layer 240, further reducing the occurrence of delamination in the main structure. Furthermore, the functional coating 300 significantly enhances the performance of the underbody protection plate while only slightly increasing its overall thickness.

[0059] The above-described contents can be implemented individually or in various combinations, and these variations are all within the scope of protection of this application.

[0060] It should be noted that in the description of this application, the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A car underbody protection plate, characterized in that, include: A buffer layer, wherein the first surface of the buffer layer is connected to the protected component; The main structure is connected to the second surface of the buffer layer, the main structure covers the second surface of the buffer layer, and the buffer layer is located in the middle of the main structure, with the edge of the side of the main structure that contacts the second surface exposed; The main structure includes a first composite material layer, a first dielectric layer, a support layer, a second dielectric layer, and a second composite material layer stacked together, with the second surface connected to the first composite material layer.

2. The vehicle underbody protection plate according to claim 1, characterized in that, The buffer layer includes multiple buffer units, which are evenly arranged on the first composite material layer.

3. The vehicle underbody protection plate according to claim 1, characterized in that, The shapes of the first dielectric layer and the second dielectric layer are adapted to the shape of the support layer. The shapes of the first composite material layer and the second composite material layer are adapted to each other. The projections of the first composite material layer and the second composite material layer on the plane where the first surface is located cover the projections of the support layer, the first dielectric layer and the second dielectric layer on the plane where the first surface is located.

4. The vehicle underbody protection plate according to claim 3, characterized in that, The main structure also includes multiple pads, the thickness of which is adapted to the thickness of the support layer. The pads are disposed on the outer periphery of the support layer and between the first composite material layer and the second composite material layer.

5. The vehicle underbody protection plate according to claim 4, characterized in that, The first composite material layer includes at least one fiber-reinforced resin material layer, and the second composite material layer includes at least one fiber-reinforced resin material layer.

6. The vehicle underbody protection plate according to claim 5, characterized in that, The first composite material layer includes multiple layers of first fiber reinforced resin material laid out in an alternating manner, wherein the fiber extension directions of two adjacent layers of first fiber reinforced resin material are different; the second composite material layer includes multiple layers of second fiber reinforced resin material laid out in an alternating manner, wherein the fiber extension directions of two adjacent layers of second fiber reinforced resin material are different.

7. The vehicle underbody protection plate according to claim 1, characterized in that, The vehicle underbody protection plate also includes a functional coating, which is disposed on the side surface of the second composite material layer opposite to the second medium layer and covers the second composite material layer.

8. The vehicle underbody protection plate according to claim 7, characterized in that, The functional coating is fixedly connected to the second composite material layer by spraying or rolling.

9. The vehicle underbody protection plate according to claim 7, characterized in that, The functional coating includes at least one of a polyurea material layer, a polymer nanomaterial layer, a flame-retardant material layer, and an anti-ultraviolet layer.

10. The vehicle underbody protection plate according to any one of claims 1-9, characterized in that, The support layer is provided with at least one through hole, and the first composite material layer and the second composite material layer are connected through at least one of the through holes.

Images