Grating plate

Abstract

The utility model provides a grating plate, and relates to the technical field of composite material plates. The grating plate comprises a shell, a composite frame and a filling layer. The shell is provided with a hollow cavity with an opening. The composite frame comprises a frame and a three-dimensional net-shaped structure located in the frame, and the composite frame is located in the hollow cavity. And the filling layer is filled in a gap between the composite frame and the inner wall surface of the shell. Therefore, the grating plate can be applied to scenes with relatively high lightweight requirements on the premise of ensuring sufficient mechanical properties, such as a van truck carriage plate, an automobile bottom guard plate, a roof photovoltaic back plate and the like, and provides strength and rigidity support as a structural member.

Description

Technical Field

[0001] The present disclosure relates to the field of composite material plates, and in particular to a grid plate. Background Art

[0002] In recent years, composite materials have not only performed well in strength and stiffness, but also have excellent high temperature resistance and oxidation resistance. These characteristics have led to the continuous expansion of the application areas of composite materials. In addition to traditional defense, aerospace and new energy industries, the application of composite materials in transportation, industrial equipment, automobiles, construction and structures is also growing rapidly. Especially in the field of new energy vehicles, the lightweight characteristics of composite materials can effectively reduce energy consumption, improve operating efficiency and extend the service life of equipment, making them widely used. For example, in the photovoltaic field, with the large increase in centralized ground photovoltaic power stations, there has been a serious shortage of land resources available for installation and construction, which has restricted the development of the photovoltaic industry to a certain extent. The installation of distributed photovoltaics has high requirements for the strength of the roof structure. For example, low-strength wooden structures and brick and tile roofs cannot be installed with conventional components. These limiting factors have led to the continuous strengthening of the pursuit of lightweight photovoltaic components in the distributed photovoltaic field. Composite materials, with their lightweight and high-strength characteristics, can theoretically enable these industries to be lightweight, but in practical applications, how to achieve true lightweighting while ensuring performance is still a challenge. Summary of the invention

[0003] The following is a summary of the subject matter of the detailed description of the present disclosure. This summary is not intended to limit the scope of the claims.

[0004] The present disclosure provides a grid plate.

[0005] According to some embodiments, a first aspect of the present disclosure provides a grid plate, which includes a shell, a composite frame and a filling layer. The shell has an open hollow cavity. The composite frame includes a frame and a three-dimensional mesh structure located in the frame, and the composite frame is located in the hollow cavity. The filling layer fills the gap between the composite frame and the inner wall surface of the shell.

[0006] According to some embodiments of the present disclosure, the three-dimensional mesh structure is formed by weaving, and the three-dimensional mesh structure includes a plurality of grids, endpoints of some of the grids fall on the frame to form intersections, and the intersections are evenly distributed on the frame.

[0007] According to some embodiments of the present disclosure, the border is a rectangular frame, and the intersection points on two opposite sides of the border are symmetrically distributed.

[0008] According to some embodiments of the present disclosure, the three-dimensional mesh structure is configured as an axisymmetric structure, and the axis of symmetry of the three-dimensional mesh structure coincides with the axis of symmetry of the frame.

[0009] According to some embodiments of the present disclosure, the shape of the grid is rhombus, square or triangle.

[0010] According to some embodiments of the present disclosure, the surface density of the three-dimensional network structure is 0.12 g / m 2 -2.5kg / m 2 The three-dimensional mesh structure includes a warp braided strip, a weft braided strip and a preset braided strip, and the angle between the preset braided strip and the warp braided strip is 45°.

[0011] According to some embodiments of the present disclosure, the shell includes multiple layers of stacked tape materials, and the multiple layers of stacked tape materials include two layers, three layers, four layers, five layers, six layers, or seven layers.

[0012] According to some embodiments of the present disclosure, the multi-layer stacked tape includes at least one layer oriented at 0° and at least one layer oriented at 90°, or, the multi-layer stacked tape includes at least one layer oriented at 0° and at least one layer oriented at 45°, or, the multi-layer stacked tape includes at least one layer oriented at 0°, at least one layer oriented at 90°, and at least one layer oriented at 45°.

[0013] According to some embodiments of the present disclosure, the filling layer is a foam filling layer, and the foam filling layer includes at least one of a PU foam layer, a PET foam layer, a PVC foam layer, and an epoxy foam layer.

[0014] According to some embodiments of the present disclosure, the thickness of the grid plate is 5 mm-50 mm.

[0015] The present disclosure provides a grid plate, which is designed to provide strength and rigidity support by matching a shell with a hollow cavity with a composite frame with a three-dimensional mesh structure and a filling layer.

[0016] Other aspects will be apparent upon reading and understanding the drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and are used together with the description to explain the principles of the embodiments of the present disclosure. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present disclosure, rather than all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a schematic structural diagram of a grid plate according to an exemplary embodiment.

[0019] Figure 2 is a schematic structural diagram of a housing according to an exemplary embodiment.

[0020] Figure 3 is a schematic diagram of a composite frame structure according to an exemplary embodiment.

[0021] Figure 4 is a schematic diagram of the structure of another composite frame according to an exemplary embodiment.

[0022] Figure 5 is a schematic diagram of the structure of another composite frame according to an exemplary embodiment.

[0023] Figure 6 is a cross-sectional view showing a three-dimensional network structure according to an exemplary embodiment.

[0024] Figure 7 is a partial structural schematic diagram of a multi-layer stacked tape according to an exemplary embodiment.

[0025] Reference numerals:

[0026] 100-shell; 110-hollow cavity; 200-composite frame; 210-frame; 220-three-dimensional mesh structure; 221-grid; 222-intersection; 223-warp braided strips; 224-weft braided strips; 225-preset braided strips; 300-filling layer; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present disclosure. It should be noted that, in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other.

[0028] The disclosed embodiment provides a grid plate, which includes a shell, a composite frame and a filling layer. The shell has an open hollow cavity. The composite frame includes a frame and a three-dimensional mesh structure located in the frame, and the composite frame is located in the hollow cavity. The filling layer fills the gap between the composite frame and the inner wall surface of the shell. In this way, through the cooperation between the shell, the composite frame with a three-dimensional mesh structure, and the filling layer filled between the composite frame and the shell, the rigidity and strength of the grid plate meet the use requirements, and the weight of the components using the grid plate, such as photovoltaic components, is also reduced.

[0029] Combine the following Figure 1-Figure 5 The embodiments of the present disclosure are described, wherein: Figure 1 A structural schematic diagram of a grid plate is provided. An exemplary embodiment of the present disclosure provides a grid plate, which includes a shell 100 and an open hollow cavity 110. The shell 100 can be a thermoplastic resin shell, and the thermoplastic resin material is a hydrophobic material, so that the thermoplastic resin shell can play a water-blocking role and reduce the water vapor permeability, thereby improving the long-term reliability of the photovoltaic module using the grid plate. In addition, setting the shell 100 to a hollow structure can reduce the mass of the shell 100.

[0030] The composite frame 200 includes a frame 210 and a three-dimensional mesh structure 220 located in the frame 210, and the composite frame 200 is located in the hollow cavity 110 of the housing 100. The composite frame 200 is configured as the three-dimensional mesh structure 220, which reduces the weight of the grid plate and provides rigidity and main structural strength for the grid plate by configuring the composite frame 200 in the hollow cavity 110 of the housing 100, thereby enhancing the strength of the grid plate.

[0031] The filling layer 300 fills the gap between the composite frame 200 and the inner wall surface of the shell 100, that is, the filling layer 300 is filled in the hollow cavity 110 of the shell 100 with the composite frame 200 installed. The filling layer 300 fills the remaining space of the hollow cavity 110 not occupied by the composite frame 200. In this way, the filling layer 300 provides supporting strength for the composite frame 200 and the shell 100, thereby further improving the strength of the grille plate.

[0032] In the grille plate disclosed herein, a composite frame 200 having a three-dimensional structure is arranged in the hollow cavity 110 of the shell 100, and a filling layer 300 is filled between the shell 100 and the composite frame 200. With the cooperation between the shell 100, the composite frame 200 and the filling layer 300, the grille plate has good strength and rigidity and is light in weight.

[0033] In some embodiments, Figure 3 , Figure 4 , Figure 5As shown, the three-dimensional mesh structure 220 is formed by weaving, and the three-dimensional mesh structure 220 includes a plurality of grids 221, and the endpoints of some grids 221 fall on the frame 210 to form intersections 222, and the intersections 222 are evenly distributed on the frame 210. Such a design enables the composite frame 200 with the three-dimensional mesh structure 220 to bear the external stress more evenly, avoiding the stress concentration in a part of the composite frame 200, resulting in local failure of the composite frame 200, thereby improving the overall rigidity and structural strength of the composite frame 200. In addition, by adjusting the weaving method, that is, adjusting the parameters of the three-dimensional weaving technology such as the yarn winding density, the yarn reinforcement treatment in different weaving directions, to design the yarn layout of the composite frame 200, that is, to design the three-dimensional mesh structure 220, the overall strength and local strength of the composite frame 200 can be effectively adjusted, and the production cost of the grid plate can be reduced.

[0034] In at least one embodiment, the composite frame 200 is a continuous fiber reinforced heat / light-curing resin composite frame 200, and the resin matrix in the continuous fiber reinforced heat / light-curing resin composite frame 200 includes at least one of epoxy resin, polyurethane resin, and modified acrylic resin. The continuous fiber in the continuous fiber reinforced heat / light-curing resin composite frame 200 includes at least one of glass fiber, carbon fiber, and basalt fiber. The mass content of the fiber in the composite frame 200 is 30%-80%, and the overall weight of the composite frame 200 is 0.3kg-5.0kg. In the grid plate, the fiber reinforced composite frame 200 is a frame composed of continuous glass fiber and resin, which provides support for the grid plate and resists deformation. In addition, according to the requirements of different application scenarios, the overall and local reinforcement of the composite frame 200 can ensure that the grid plate is not damaged or decoupled when subjected to positive and negative pressures of 2400Pa, and the deformation is <50mm.

[0035] In some embodiments, the frame 210 is a rectangular frame, and the intersections 222 on two opposite sides of the frame 210 are symmetrically distributed. In this way, the stress on the frame 210 is evenly distributed, and there is no stress concentration problem, thereby improving the strength of the composite frame 200.

[0036] Based on the above embodiments, in some embodiments, the three-dimensional mesh structure 220 is set as an axisymmetric structure, and the symmetry axis of the three-dimensional mesh structure 220 coincides with the symmetry axis of the frame 210. In this way, the three-dimensional mesh structure 220 is an axisymmetric structure, so that the stress applied to the three-dimensional mesh structure 220 is evenly distributed, avoiding the problem of stress concentration and local damage in the three-dimensional mesh structure 220, and improving the overall stress bearing capacity of the composite frame 200.

[0037] As an example, Figure 3 , Figure 4 and Figure 5As shown, the frame 210 of the composite frame 200 is a rectangular frame, and the three-dimensional mesh structure 220 is an axisymmetric figure, whose axis of symmetry coincides with the axis of symmetry of the rectangular frame. The grid 221 in the three-dimensional mesh structure 220 has three intersections 222 on each long side of the rectangular frame, and the intersections 222 are evenly distributed on the long side of the rectangular frame, dividing each long side into four equal parts. The grid 221 in the three-dimensional mesh structure 220 has three intersections 222 on each short side of the rectangular frame, and the intersections 222 are evenly distributed on the short side of the rectangular frame, dividing each long side into four equal parts. In addition, as Figure 4 As shown, the grid 221 in the three-dimensional mesh structure 220 has three intersection points 222 on each short side of the rectangular frame, and two intersection points 222 are located at the end points of the rectangle.

[0038] In some embodiments, the shape of the grid 221 is rhombus, square or triangle. Figure 3 , Figure 4 and Figure 5 As shown, the sides of the grid 221 are separated or merged to form grid structures of different shapes. The separation or merging of the sides of the grid 221 is adjusted by adjusting the winding scheme of the three-dimensional weaving technology to form a three-dimensional mesh structure 220 with different structures.

[0039] It should be understood that the structure of the composite frame 200 is not limited to the structures shown in the above examples and figures, and can be designed according to actual needs. For example, the frame 210 is not limited to a rectangular frame, but can also be other frames 210 such as a square frame, a circular frame or other polygonal frames; for example, the number of intersections 222 of the grid 221 on the frame 210 is not limited to three in the above examples, but can also be two or four or more. In addition, the three-dimensional mesh structure 220 in the composite frame 200 is not limited to the structures in the above examples and figures, and can also be a three-dimensional mesh structure 220 in the composite frame 200. Figure 3 , Figure 4 and Figure 5 The structure shown in is a three-dimensional network structure 220 of repeating units. All of the above can be designed according to the needs of practice, and will not be described in detail here.

[0040] In some embodiments, the surface density of the three-dimensional network structure 220 is 0.12 g / m 2 -2.5kg / m2, reference Figure 6 As shown, the three-dimensional mesh structure 220 includes a warp braided strip 223, a weft braided strip 224 and a preset braided strip 225, and the angle between the preset braided strip 225 and the warp braided strip 223 is 45°. In this way, by controlling the parameters of the braiding technology such as the yarn winding density and the winding method, the surface density and the braided strip direction of the three-dimensional mesh structure 220 are controlled, so that the grid plate can dissipate stress in time, thereby enhancing the pressure bearing capacity of the grid plate.

[0041] As an example, Figure 6 As shown, the warp braided strip 223 extends in a straight line direction, the weft braided strip 224 extends in another straight line direction, and the extension directions of the warp braided strip 223 and the weft braided strip 224 are perpendicular to each other, and the two are in an orthogonal weaving form. The preset braided strip 225 extends in a serpentine shape in a plane, which is perpendicular to the warp braided strip 223 and parallel to the weft braided strip 224. The planes where the multiple preset braided strips 225 are located are parallel to each other and the angle between them and the warp braided strip 223 is 45°. Two adjacent preset braided strips 225 are interlaced in the gaps where the warp braided strips 223 and the weft braided strips 224 are orthogonally woven in a direction perpendicular to the plane where the preset braided strips 225 are located. A coordinate system with a first direction X, a second direction Y and a third direction Z is established as a reference. The warp braided strips 223 extend along the third direction Z, and the weft braided strips 224 extend along the first direction X. The warp braided strips 223 and the weft braided strips 224 are woven orthogonally. The preset braided strips 225 are parallel to the plane formed by the first direction X and the second direction Y, and are serpentinely arranged between the gaps of the orthogonal weaving of the warp braided strips 223 and the weft braided strips 224, so as to finally weave a three-dimensional network structure with a three-phase orthogonal structure.

[0042] In at least one embodiment, the composite frame 200 of the grating plate is a continuous fiber reinforced composite frame based on three-dimensional weaving technology, and the continuous fibers used include at least one of glass fibers, carbon fibers and basalt fibers. The mass content of the fibers in the composite frame 200 is 30%-80%, and the overall weight of the composite frame 200 is 0.3kg-5.0kg, ensuring sufficient supporting strength for the grating plate and being able to withstand a positive and negative pressure load-bearing capacity of 2400Pa.

[0043] In some embodiments, the housing 100 includes multiple layers of stacked tapes, including two, three, four, five, six, or seven layers.

[0044] As an example, the shell 100 is a continuous fiber reinforced thermoplastic resin multilayer tape, the resin matrix of the thermoplastic resin multilayer tape includes at least one of polypropylene, polyamide, high-density polyethylene or polyethylene terephthalate resin, the continuous fiber includes at least one of glass fiber, carbon fiber and basalt fiber, the fiber mass content in the thermoplastic resin multilayer tape is 10%-80%, and the unit area weight of the thermoplastic resin multilayer tape is 300m 2 -3000g / m 2. The thermoplastic resin in the shell 100 mainly plays a role of water blocking. For example, polypropylene, high-density polyethylene, etc. are all hydrophobic materials, which can improve the water blocking performance of the grid plate, that is, the water vapor permeability is reduced, and the long-term reliability of the equipment installed with the grid plate is improved. The continuous fiber reinforced thermoplastic resin layer belt in the shell 100 is 2-6 layers. In this way, the grid plate with the shell 100 has good water blocking and air permeability, which can reduce the impact of the external environment on the battery material and life, and thus avoid the adverse problems caused by adding a thin layer of aluminum film to the composite material plate to enhance the water blocking performance of the grid plate. For example, in the process of using the composite material plate with aluminum film, it is necessary to punch holes in the plate for the battery bus bar to lead out, but because the bus bar and the aluminum film in the plate have good conductivity, the bus bar can easily form a short circuit with the aluminum film at the hole punched in the composite material plate lead-out line, resulting in device failure or even safety accidents. For another example, since the composite material sheet with aluminum film needs to be cut according to the installation requirements during use, the aluminum film will be exposed on the side of the composite material sheet after cutting, and the metal frame is installed on the side of the composite material sheet during the production of the battery assembly. The exposed aluminum film and the metal frame will form a conductive channel, causing a short circuit, affecting the safe operation of the battery assembly and the power station system. The use of the shell 100 in the above example will avoid the above problems caused by adding aluminum film to the composite material sheet, and can also improve the overall water-blocking ability, thereby saving production costs.

[0045] In some embodiments, the multi-layered tape (fiber direction) includes at least one layer oriented at 0° and at least one layer oriented at 90°, or the multi-layered tape includes at least one layer oriented at 0° and at least one layer oriented at 45°, or the multi-layered tape includes at least one layer oriented at 0°, at least one layer oriented at 90°, and at least one layer oriented at 45°. For the orientation of the multi-layered tape, please refer to Figure 7 , Figure 7 The figure shows a partial structural schematic diagram of a multi-layer stacked tape, such as a continuous fiber reinforced thermoplastic resin multi-layer tape, in which the fiber direction in each layer of continuous fiber reinforced thermoplastic resin tape, i.e., the Fiber direction marked in the figure, is used to characterize the orientation of each layer of continuous fiber reinforced thermoplastic resin tape when stacked. Specifically, a coordinate system having a first direction X, a second direction Y, and a third direction Z is established as a reference, the first direction, i.e., the extension direction of the X direction, is oriented at 90°, the third direction, i.e., the extension direction of the Z direction, is oriented at 0°, the direction at an angle of 45° with the first direction, i.e., the extension direction of the X direction, is oriented at +45°, and the direction at an angle of 45° with the third direction, i.e., the extension direction of the Z direction, is oriented at -45°, and the two can be collectively referred to as 45°.

[0046] As an example, the continuous fiber reinforced thermoplastic resin multilayer tape includes two layers, namely a first layer and a second layer, wherein the first layer of continuous fiber reinforced thermoplastic resin layer tape extends in a 0° orientation and the second layer of continuous fiber reinforced thermoplastic resin layer tape extends in a 90° orientation.

[0047] As an example, the continuous fiber reinforced thermoplastic resin multilayer tape includes three layers, namely a first layer, a second layer and a third layer, wherein the first layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 0° direction, the second layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 90° direction, and the third layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 0° direction.

[0048] As an example, the continuous fiber reinforced thermoplastic resin multilayer tape includes four layers, namely a first layer, a second layer, a third layer and a fourth layer, wherein the first layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 0° direction, the second layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 45° direction, the third layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 45° direction, and the fourth layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 0° direction.

[0049] As an example, the continuous fiber reinforced thermoplastic resin multilayer tape includes five layers, namely a first layer, a second layer, a third layer, a fourth layer and a fifth layer, wherein the first layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 0° direction, the second layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 90° direction, the third layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 45° direction, the fourth layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 45° direction, and the fifth layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extends in a 90° direction.

[0050] As an example, the continuous fiber reinforced thermoplastic resin multilayer tape includes six layers, namely a first layer, a second layer, a third layer, a fourth layer, a fifth layer and a sixth layer, wherein the first layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extended in a 0° direction, the second layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extended in a 90° direction, the third layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extended in a 45° direction, the fourth layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extended in a 45° direction, the fifth layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extended in a 90° direction, and the sixth layer of continuous fiber reinforced thermoplastic resin layer tape is oriented and extended in a 0° direction.

[0051] It should be understood that the orientation of the tapes of different layers in the continuous fiber reinforced thermoplastic resin multilayer tape in the above example can refer to Figure 7The orientation shown in the figure, and the 45° orientation mentioned in the above example may include at least one of a +45° orientation or a -45° orientation, which can be designed according to actual needs and will not be described in detail here.

[0052] In some embodiments, the filling layer 300 is a foam filling layer, and the foam filling layer includes at least one of a PU (Polyurethane) foam layer, a PET (Polyethylene terephthalate) foam layer, a PVC (Poly Vinyl Chloride) foam layer, and an epoxy foam layer. Thus, the filling layer 300 is a filling layer 300 obtained by foaming resin and having the characteristics of light weight and high strength, which provides support strength for the composite frame 200 and the housing 100, and improves the strength of the grid plate.

[0053] In at least one embodiment, the density of the filling layer 300 is 20 kg / m 3 -1000kg / m 3 The operating temperature range of the filling layer 300 is -40°C to 120°C.

[0054] In some embodiments, the grid plate has a thickness of 5 mm to 50 mm.

[0055] As an example, the shell 100 of the grid plate has a thickness of 10 mm and is a continuous fiber reinforced thermoplastic resin multilayer belt having a hollow cavity 110. The composite frame 200 of the grid plate includes a frame 210 and a three-dimensional mesh structure 220, and is located in the hollow cavity 110 of the shell 100, such as Figure 3 As shown, the composite frame 200 is a frame body obtained by three-dimensional weaving of continuous fibers impregnated with a resin matrix, with a frame weight of 1.6 kg and a fiber content of 50%. The filling layer 300 of the grid plate is filled between the shell 100 and the composite frame 200 and is a resin foaming layer. The resin foaming layer is a composite layer with a ratio of black material (polyisocyanate): white material (polyether polyol) of 1.1:1.0.

[0056] The load performance test was conducted on the grid plate of Example 1. Under the condition of bearing pressure of 2400Pa, the deformation test results are shown in Table 1 below:

[0057] Table 1 Example 1 Grid plate load performance test results

[0058] Test content Long side deformation Short side deformation One positive pressure 30 mm 30mm One back pressure 35mm 44mm Secondary positive pressure 44mm 44mm Secondary back pressure 36mm 42mm Three positive pressure 34mm 40mm Three back pressure 32mm 45mm

[0059] As can be seen from Table 1, the grid plate in this example can pass 6 rounds of load tests, and no microcracks are formed after the test, and the power retention rate is >97%. Therefore, it can be considered that the grid plate provided in this example can effectively assume the supporting and protective role of the flexible device.

[0060] In another example, the grid plate includes a housing 100, a composite frame 200 and a filling layer 300, and the composite frame 200 is as follows Figure 4 The structure shown has a frame weight of 1.6 kg and a fiber content of 50%. The other structural arrangements of the grid plate can refer to the above examples and will not be described in detail here.

[0061] The load performance test was conducted on the grid plate of Example 2. Under the condition of bearing pressure of 2400Pa, the deformation test results are shown in Table 2 below:

[0062] Table 2 Example 2 grid plate load performance test results

[0063] Test content Long side deformation Short side deformation One positive pressure 32 mm 38mm One back pressure 33mm 42mm Secondary positive pressure 32mm 41mm Secondary back pressure 33mm 43mm Three positive pressure 35mm 41mm Three back pressure 33mm 43mm

[0064] In another example, the grid plate includes a housing 100, a composite frame 200 and a filling layer 300, and the composite frame 200 is as follows Figure 5 The structure shown has a frame weight of 2.4 kg and a fiber content of 52%. The other structural arrangements of the grid plate can refer to the above examples and will not be described in detail here.

[0065] The load performance test was conducted on the grid plate of Example 3. Under the condition of bearing pressure of 2400Pa, the deformation test results are shown in Table 3 below:

[0066] Table 3 Example three grid plate load performance test results

[0067] Test content Long side deformation Short side deformation One positive pressure 24 mm 30mm One back pressure 25mm 34mm Secondary positive pressure 24mm 32mm Secondary back pressure 26mm 32mm Three positive pressure 25mm 31mm Three back pressure 25mm 33mm

[0068] It can be seen from Table 1, Table 2 and Table 3 that the grid plate of this embodiment can pass the 6-round load test, and no microcracks are formed after the test, the power retention rate is >97%, and the power retention rate corresponding to Table 3 is >98%. It can be considered that the grid plate provided by this embodiment can effectively assume the supporting and protective role of the flexible device.

[0069] In the present disclosure, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of more restrictions, an element defined by the sentence "comprising..." does not exclude the presence of additional identical elements in the article or device comprising the element.

[0070] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present disclosure.

[0071] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the intent of the present disclosure also includes these modifications and variations.

Claims

1. A grid plate, characterized in that: include: A housing having an open hollow cavity; A composite frame, comprising a frame and a three-dimensional mesh structure located within the frame, wherein the composite frame is located within the hollow cavity; The filling layer is used to fill the gap between the composite frame and the inner wall surface of the shell.

2. The grid plate according to claim 1, characterized in that: The three-dimensional mesh structure is formed by weaving, and the three-dimensional mesh structure includes a plurality of grids, and end points of some of the grids fall on the frame to form intersections, and the intersections are evenly distributed on the frame.

3. The grid plate according to claim 2, characterized in that: The frame is a rectangular frame, and the intersection points on two opposite sides of the frame are symmetrically distributed.

4. The grid plate according to claim 3, characterized in that: The three-dimensional mesh structure is configured as an axisymmetric structure, and the axis of symmetry of the three-dimensional mesh structure coincides with the axis of symmetry of the frame.

5. The grid plate according to claim 2, characterized in that: The shape of the grid is rhombus, square or triangle.

6. The grid plate according to any one of claims 1 to 5, characterized in that: The surface density of the three-dimensional network structure is 0.12 g / m 2 -2.5kg / m 2 The three-dimensional mesh structure includes a warp braided strip, a weft braided strip and a preset braided strip, and the angle between the preset braided strip and the warp braided strip is 45°.

7. The grid plate according to claim 6, characterized in that: The shell includes multiple layers of stacked strips, and the multiple layers of stacked strips include two layers, three layers, four layers, five layers, six layers or seven layers.

8. The grid plate according to claim 7, characterized in that: The multi-layered tape comprises at least one layer oriented at 0° and at least one layer oriented at 90°, or, The multi-layered tape comprises at least one layer oriented at 0° and at least one layer oriented at 45°, or, The multi-layered tape includes at least one layer oriented in a 0° direction, at least one layer oriented in a 90° direction, and at least one layer oriented in a 45° direction.

9. The grid plate according to claim 1, characterized in that: The filling layer is a foam filling layer, and the foam filling layer includes at least one of a PU foam layer, a PET foam layer, a PVC foam layer, and an epoxy foam layer.

10. The grid plate according to claim 1, characterized in that: The thickness of the grid plate is 5mm-50mm.

Images