Upper cover for electromagnetic shielding, battery box and vehicle

Abstract

The utility model relates to an upper cover for electromagnetic shielding, a battery box and a vehicle. The upper cover for electromagnetic shielding comprises a first fiber layer, a metal net, a conductive foam layer and a second fiber layer which are arranged in sequence, the first fiber layer, the metal net, the conductive foam layer and the second fiber layer are arranged in parallel, the conductive foam layer is located on the side, facing the box body of the battery box, of the upper cover, and the second fiber layer is located on the side, facing the box body of the battery box, of the upper cover. The first fiber layer, the metal net, the conductive foam layer and the second fiber layer are of an integrated structure. The upper cover can effectively shield external electromagnetic waves for a battery and related electronic elements in the battery box, electromagnetic interference is avoided, the weight is light, the weight of the upper cover and the weight of the battery box can be reduced, then the weight of a vehicle is reduced, the energy consumption of the vehicle is reduced, and the endurance mileage of the vehicle is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle battery boxes, and in particular to an upper cover for electromagnetic shielding, a battery box and a vehicle. Background Art

[0002] During the driving of a new energy vehicle and the charging and discharging of the battery, electronic components on the vehicle will generate electromagnetic interference sources, which will affect the battery and battery components. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related art to a certain extent. For this reason, an embodiment of the utility model provides an upper cover for electromagnetic shielding, which can effectively shield external electromagnetic waves for the battery and related electronic components in the battery box, avoid electromagnetic interference, and has a light weight, which is beneficial to reducing the vehicle energy consumption and improving the vehicle's cruising range.

[0004] An embodiment of the utility model provides a battery box.

[0005] An embodiment of the utility model provides a vehicle.

[0006] The upper cover for electromagnetic shielding in the embodiment of the utility model includes a first fiber layer, a metal mesh, a conductive foam layer and a second fiber layer arranged in sequence. The first fiber layer, the metal mesh, the conductive foam layer and the second fiber layer are arranged in parallel. The conductive foam layer is located on the side of the upper cover facing the box body of the battery box. The first fiber layer, the metal mesh, the conductive foam layer and the second fiber layer are an integral structure.

[0007] The upper cover in the embodiment of the utility model can effectively shield external electromagnetic waves for the battery and related electronic components in the battery box, avoid electromagnetic interference, and has a light weight, which is beneficial to reducing the vehicle energy consumption and improving the vehicle's cruising range.

[0008] In some embodiments, the mesh size of the metal mesh is 0.1 - 0.5 mm.

[0009] In some embodiments, the thickness of the first fiber layer is 0.4 - 0.6 mm, the thickness of the metal mesh is 0.2 - 0.4 mm, the thickness of the conductive foam layer is 0.8 - 1.2 mm, and the thickness of the second fiber layer is 0.4 - 0.6 mm.

[0010] In some embodiments, the first fiber layer and the second fiber layer are glass fiber fabrics.

[0011] In some embodiments, both the first fiber layer and the second fiber layer are prepregs.

[0012] In some embodiments, one of a convex block and a groove is provided on the upper cover, and the one of the convex block and the groove faces the box body of the battery box and abuts against the box body.

[0013] In some embodiments, one of the convex block and the groove is circular or oval.

[0014] In some embodiments, one of the convex block and the groove is provided on the periphery of the upper cover.

[0015] A battery box according to an embodiment of the present invention includes an upper cover and a box body. The upper cover is the upper cover described in any of the embodiments. The upper cover is buckled on the box body, and the upper cover is detachably connected to the box body.

[0016] In some embodiments, one of the convex block and the groove is provided on the upper cover, and the other of the convex block and the groove is provided on the box body. The convex block faces the groove and is fitted in the groove.

[0017] A vehicle according to an embodiment of the present invention includes the battery box described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of the upper cover according to an embodiment of the present invention;

[0019] Figure 2 is a schematic structural view of the battery box according to an embodiment of the present invention;

[0020] REFERENCE MARKS:

[0021] Upper cover 100;

[0022] First fiber layer 1, metal mesh 2, conductive foam layer 3, convex block 4;

[0023] Box body 200;

[0024] Battery box 1000. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] The electromagnetic shielding upper cover 100, battery box 1000 and vehicle according to embodiments of the present invention will be described in detail below with reference to the attached Figures 1 to 2 drawings.

[0027] The vehicle according to the embodiment of the present utility model includes a battery box 1000. The battery box 1000 includes an upper cover 100 and a box body 200. The upper cover 100 is buckled on the box body 200, and the upper cover 100 is detachably connected to the box body 200. A battery is placed inside the box body 200.

[0028] As Figure 1 shown, the upper cover 100 for electromagnetic shielding according to the embodiment of the present utility model includes a first fiber layer 1, a metal mesh 2, a conductive foam layer 3, and a second fiber layer 5 arranged in sequence. The first fiber layer 1, the metal mesh 2, the conductive foam layer 3, and the second fiber layer 5 are arranged in parallel with each other. The conductive foam layer 3 is located on the side of the upper cover 100 facing the box body 200 of the battery box 1000. The first fiber layer 1, the metal mesh 2, the conductive foam layer 3, and the second fiber layer 5 are of an integral structure.

[0029] The manufacturing process of the upper cover 100 for electromagnetic shielding according to the embodiment of the present utility model is as follows:

[0030] Step 1: In a preforming mold, the first fiber layer 1, the metal mesh 2, the conductive foam layer 3, and the second fiber layer 5 are sequentially placed, and preforming processing of the upper cover is carried out to form a preform.

[0031] Step 2: In an injection mold, the preforms of the first fiber layer 1, the metal mesh 2, the conductive foam 3, and the second fiber layer 5 are sequentially placed, and then resin is injected into the injection mold. The temperature of the mold is 70 - 180°C, and the vacuum degree is not greater than -0.085 MPa.

[0032] Step 3: The mold is heated for 3 - 5 minutes, and then the injection mold is opened for demolding.

[0033] Step 4: Cut off the waste edges of the upper cover 100 product to complete the production process.

[0034] The upper cover 100 for battery shielding in the embodiments of the present utility model, when an air electric field is formed around the metal mesh 2, due to the short - circuit effect of the conductive metal mesh 2, the electric field is short - circuited and disappears, destroying the formation of the electric field. When the electromagnetic wave reaches the area of the metal mesh 2, the electric field disappears and the magnetic field cannot be generated continuously, thus truncating the continuous propagation of the electromagnetic wave and achieving the effect of shielding electromagnetic waves. The conductive foam layer 3 of the upper cover 100 in the embodiments of the present utility model is located on the side facing the box body 200. The conductive foam layer 3 can further shield external electromagnetic interference, protect the electronic components in the battery box 1000 from the influence of the external electromagnetic field, ensure excellent communication effects between the electronic components in the battery box 1000, and ensure the accuracy and reliability of data transmission. At the same time, the conductive foam layer 3 can play the role of transmitting electric energy during the process of transmitting the electric signal from one end to the other end, so it has conductive performance, avoiding faults caused by poor conductivity of electronic components. The conductive foam layer 3 can also be insulated, preventing short - circuit phenomena between different components in the electronic product, and ensuring the stability and safety of the battery. Moreover, the conductive foam is light in weight, thus being able to reduce the weight of the upper cover 100, reduce the weight of the battery box 1000, and then reduce the weight of the vehicle, reduce the vehicle energy consumption, and be conducive to improving the cruising range of the vehicle.

[0035] The upper cover 100 for battery shielding in the embodiments of the present utility model uses the first fiber layer 1 and the second fiber layer 5 as the outer plates of the upper cover 100, covering the metal mesh 2 and the conductive foam 3. The first fiber layer 1 and the second fiber layer 5 have the advantages of good corrosion resistance, high heat resistance, and high mechanical strength, and can ensure the mechanical performance of the upper cover 100.

[0036] Therefore, the upper cover 100 in the embodiments of the present utility model can effectively shield external electromagnetic waves for the batteries and related electronic components in the battery box 1000, avoid electromagnetic interference, and is light in weight, which is conducive to reducing vehicle energy consumption and improving the cruising range of the vehicle.

[0037] Specifically, the upper cover 100 and the box body 200 are detachably connected by bolts.

[0038] In some embodiments, the first fiber layer 1 and the second fiber layer 5 are glass fiber fabrics. The glass fiber fabrics are light in weight, which is conducive to further reducing the weight of the upper cover 100, further reducing the weight of the battery box 1000, further reducing the weight of the vehicle, further reducing the vehicle energy consumption, and further improving the cruising range of the vehicle.

[0039] In some embodiments, the mesh size of the metal mesh 2 is 0.1 - 0.5 mm. Thus, the metal mesh 2 has a good shielding effect on electromagnetic waves. For example, the mesh size of the metal mesh 2 is 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm. In this embodiment, the mesh size of the metal mesh 2 is 0.5 mm.

[0040] In some embodiments, the metal mesh 2 is an aluminum foil mesh.

[0041] In some embodiments, both the first fiber layer 1 and the second fiber layer 5 are prepregs. Then, when manufacturing the upper cover 100 of the present invention, after step 1, the preforms of the first fiber layer 1 and the second fiber layer 5 are impregnated with resin, then heated and pre-cured, and then step 2 is carried out to mold the preforms of the first fiber layer 1, the metal mesh 2, the conductive foam 3, and the second fiber layer 5 into an integrated structure. A prepreg is made by impregnating a continuous fiber fabric with a resin matrix under strictly controlled conditions to form a resin matrix and a fiber fabric (the first fiber layer 1 and the second fiber layer 5), which can improve the combined strength of the first fiber layer 1 and the second fiber layer 5 with the metal mesh 2 and the conductive foam 3, that is, improve the strength of the upper cover 100.

[0042] In some embodiments, the thickness of the first fiber layer 1 is 0.4 - 0.6 mm, the thickness of the metal mesh 2 is 0.2 - 0.4 mm, the thickness of the conductive foam layer 3 is 0.8 - 1.2 mm, and the thickness of the second fiber layer 5 is 0.4 - 0.6 mm. For example, the thickness of the first fiber layer 1 is 0.4 mm, 0.5 mm, or 0.6 mm. For example, the thickness of the metal mesh 2 is 0.2 mm, 0.3 mm, or 0.4 mm. For example, the thickness of the conductive foam layer 3 is 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, or 1.2 mm. For example, the thickness of the second fiber layer 5 is 0.4 mm, 0.5 mm, or 0.6 mm. In this embodiment, the thickness of the first fiber layer 1 is 0.5 mm, the thickness of the metal mesh 2 is 0.3 mm, the thickness of the conductive foam layer 3 is 1 mm, and the thickness of the second fiber layer 5 is 0.5 mm.

[0043] In some embodiments, one of a convex block 4 and a groove is provided on the upper cover 100, and the other of the convex block 4 and the groove is provided on the box body 200. The one of the convex block 4 and the groove abuts against the box body 200 of the battery box 1000, and the convex block 4 is opposite to and fitted in the groove. In other words, a convex block 4 is provided on the upper cover 100, a groove is provided on the box body 200, the convex block 4 is fitted in the groove, and the convex block 4 abuts against the box body 200. Or, a groove is provided on the upper cover 100, a convex block 4 is provided on the box body 200, the convex block 4 is fitted in the groove, and the wall surface of the groove abuts against the convex block 4, that is, the box cover abuts against the box body 200.

[0044] In this embodiment, a convex block 4 is provided on the upper cover 100, and a groove is provided on the box body 200. The cooperation between the convex block 4 and the groove increases the contact area between the upper cover 100 and the box body 200, which can improve the fixing effect of the box body 200 and the upper cover 100, reduce the looseness of the upper cover 100 and the box body 200 caused by the vibration generated during vehicle driving, and is beneficial to improving the stability of the battery box 1000.

[0045] Specifically, when the upper cover 100 is molded by pressing, the convex block 4 or the groove of the upper cover 100 is formed by extrusion of an injection mold, so that the self-weight and manufacturing difficulty of the upper cover 100 are not increased.

[0046] In some embodiments, one of the convex block 4 and the groove is circular or oval. The circular and oval convex blocks 4 both have smooth circumferential surfaces, so that the stress distribution is relatively uniform in the circumferential direction, which can reduce stress concentration and further improve the stability of the upper cover 100 and the battery box 1000.

[0047] In some embodiments, a plurality of the above-mentioned one of the convex block 4 and the groove are provided around the upper cover 100. That is, a plurality of convex blocks 4 are provided around the upper cover 100, or a plurality of grooves are provided around the upper cover 100. In this embodiment, a plurality of convex blocks 4 are provided around the upper cover 100. Correspondingly, a plurality of grooves are provided around the box body 200. Then, the contact area between the upper cover 100 and the box body 200 is further increased, and the contact area between the upper cover 100 and the box body 200 is evenly distributed around the upper cover 100, which is not only beneficial to increasing the integrity of the upper cover 100 and the box body 200, further avoiding the looseness of the upper cover 100 and the box body 200 caused by vibration during vehicle driving, further increasing the stability of the battery box 1000, but also improving the sealing performance between the upper cover 100 and the box body 200, increasing the protection effect of the battery box 1000 on the batteries and their electronic components located inside, and further ensuring the stability and safety of the batteries.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0049] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] In the present utility model, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0051] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0052] In the present utility model, terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0053] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A cover (100) for electromagnetic shielding, characterized in that: The invention comprises a first fiber layer (1), a metal mesh (2), a conductive foam layer (3) and a second fiber layer (5) which are arranged in sequence, wherein the first fiber layer (1), the metal mesh (2), the conductive foam layer (3) and the second fiber layer (5) are arranged in parallel with each other, the conductive foam layer (3) is located on a side of the upper cover (100) facing the box body (200) of the battery box (1000), and the first fiber layer (1), the metal mesh (2), the conductive foam layer (3) and the second fiber layer (5) are an integrated structure.

2. The upper cover (100) for electromagnetic shielding according to claim 1, characterized in that: The mesh size of the metal mesh (2) is 0.1-0.5 mm.

3. The upper cover (100) for electromagnetic shielding according to claim 1, characterized in that: The thickness of the first fiber layer (1) is 0.4-0.6 mm, the thickness of the metal mesh (2) is 0.2-0.4 mm, the thickness of the conductive foam layer (3) is 0.8-1.2 mm, and the thickness of the second fiber layer (5) is 0.4-0.6 mm.

4. The upper cover (100) for electromagnetic shielding according to claim 1, characterized in that: The first fiber layer (1) and the second fiber layer (5) are glass fiber fabrics.

5. The upper cover (100) for electromagnetic shielding according to claim 1, characterized in that: The first fiber layer (1) and the second fiber layer (5) are both prepregs.

6. The upper cover (100) for electromagnetic shielding according to claim 1, characterized in that: The upper cover (100) is provided with a convex block (4) and one of the concave blocks; the convex block (4) and the one of the concave blocks (4) are opposite to the box body (200) of the battery box (1000) and abut against the box body (200).

7. The upper cover (100) for electromagnetic shielding according to claim 6, characterized in that: A plurality of the protrusions (4) and one of the grooves are provided around the upper cover (100).

8. A battery box (1000), characterized in that: The invention comprises an upper cover (100) and a box body (200), wherein the upper cover (100) is the upper cover (100) according to any one of claims 1 to 7, the upper cover (100) is buckled on the box body (200), and the upper cover (100) and the box body (200) are detachably connected.

9. The battery box (1000) according to claim 8, characterized in that: The upper cover (100) is provided with a protrusion (4) and one of the grooves, and the box body (200) is provided with the protrusion (4) and the other of the grooves, and the protrusion (4) is opposite to the groove and fits in the groove.

10. A vehicle, characterized in that: A battery box (1000) comprising any one of claims 8 to 9.

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