Sound insulation pad for automobile battery

Abstract

An automobile battery sound insulation pad comprises a foam layer located between a battery and a chassis, a metal net is arranged in the foam layer, the net face of the metal net extends along the layer face of the foam layer, the metal net is formed by weaving metal wires in a staggered mode, the mesh number of the metal net ranges from 20 meshes to 200 meshes, and electromagnetic waves emitted by a battery module to an automobile bottom plate can be effectively shielded; the noise environment of the whole vehicle is optimized; meanwhile, the metal net is formed by weaving the metal wires in a staggered mode, compared with the scheme that the shielding layer adopts a thin plate or a net structure formed by punching the thin plate in the prior art, the whole sound insulation pad is lighter, no punching excess materials are generated, and the requirements for automobile light weight and material cost reduction can be better met.

Description

Technical Field

[0001] The utility model relates to automobile noise reduction, in particular to an automobile battery sound insulation pad. Background Art

[0002] In the field of new energy vehicles, due to the large chassis space suitable for installing larger battery modules, sound insulation pads are generally installed between the battery module and the chassis. Sound insulation pads are a type of sound insulation material used to reduce noise inside the vehicle. They are usually composed of multiple layers of different materials. They can effectively absorb and reduce noise transmitted into the vehicle, improving driving comfort.

[0003] The technical solution disclosed in the patent document entitled "Electromagnetic Shielding Sound Insulation Pad" (document number CN221718014U, hereinafter referred to as Document 1) includes a sound insulation pad body with a hollow cavity in the middle. A layer of metal mesh is provided above and below the hollow cavity. Both ends of the sound insulation pad body are provided with a surrounding edge, and the ends of the surrounding edge are provided with a plurality of fixing holes. The base layer and the metal mesh are provided to improve the sound insulation effect and isolate the interference of electromagnetic signals.

[0004] When operating, automotive battery modules generate electromagnetic waves (also known as electromagnetic radiation). While these electromagnetic waves don't significantly impact the human body, since the vehicle's floor is made of sheet metal, the electromagnetic waves emitted to the floor can cause vibrations in certain mechanical components or spatial volumes, generating noise, further exacerbating the overall vehicle noise. Known technologies typically address this issue by using sound insulation pads with internal shielding layers. However, these shielding layers are often thin plates or mesh structures formed by punching holes in thin plates. For example, in Document 1, electromagnetic shielding is achieved by placing a metal mesh within the main body of the sound insulation pad. While meeting shielding requirements, this approach still requires improvement from the perspectives of vehicle lightweighting and material costs. Summary of the Invention

[0005] The utility model provides a car battery sound insulation pad, which can shield the electromagnetic waves transmitted from the battery module to the chassis sheet metal parts, reduce the electromagnetic noise of the whole vehicle, and improve driving comfort.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted is: a car battery sound insulation pad, comprising a foam layer located between the battery and the chassis, a metal mesh is arranged inside the foam layer, the mesh surface of the metal mesh extends along the plane of the foam layer, the metal mesh is composed of metal wires woven in an interlaced manner and the mesh number of the metal mesh is 20 to 200 meshes.

[0007] Compared with the existing technology, the technical effect of the utility model is: a metal mesh with a mesh size of 20 to 200 is arranged in the foam layer of the battery sound insulation pad, which can effectively shield the electromagnetic waves emitted by the battery module to the car floor and optimize the noise environment of the whole vehicle; at the same time, the metal mesh is composed of metal wires woven in an interlaced manner. Compared with the traditional technology in which the shielding layer adopts a thin plate or a mesh structure formed by punching a thin plate, the sound insulation pad is lighter as a whole and no punching waste is generated, which can better meet the needs of lightweighting the car and reducing material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the utility model. DETAILED DESCRIPTION

[0009] The following is combined with Figure 1 And related content, the utility model is further described in detail:

[0010] A car battery sound insulation pad includes a foam layer 10 located between the battery and the chassis. A metal mesh 20 is arranged inside the foam layer 10. The mesh surface of the metal mesh 20 extends along the surface of the foam layer 10. The metal mesh 20 is composed of metal wires woven in an interlaced manner and has a mesh count of 20 to 200.

[0011] In the above scheme, a metal mesh 20 with a mesh size of 20 to 200 is arranged in the foam layer 10 of the battery sound insulation pad, which can effectively shield the electromagnetic waves emitted by the battery module to the car floor and optimize the noise environment of the whole vehicle; at the same time, the metal mesh 20 is composed of metal wires woven in an interlaced manner. Compared with the traditional technology in which the shielding layer adopts a thin plate or a mesh structure formed by punching a thin plate, the sound insulation pad is lighter as a whole and no punching waste is generated, which can better meet the needs of lightweighting the car and reducing material costs.

[0012] Furthermore, to ensure the sound insulation mat's effective shielding capability against electromagnetic waves, at least two layers of metal mesh 20 are sequentially arranged in the thickness direction of the foam layer 10, with the holes of two adjacent layers of metal mesh 20 staggered. The staggered arrangement of multiple layers of metal mesh 20 effectively ensures the sound insulation mat's shielding capability against electromagnetic waves.

[0013] As a preferred embodiment, the mesh size of the metal mesh 20 is 100 mesh. Regarding the mesh size design of the metal mesh 20, a mesh size that is too large will affect the shielding effect of the metal mesh 20 against electromagnetic waves, while a mesh size that is too small will significantly increase the overall weight of the metal mesh 20. Therefore, after extensive testing and design, the present application has determined that a mesh size of 100 mesh is the most suitable for the metal mesh 20, which not only ensures effective electromagnetic wave shielding capability but also makes the metal mesh 20 relatively light overall.

[0014] In addition, the metal wire used to weave the metal mesh 20 is ferritic stainless steel wire, which has a better electromagnetic isolation effect than the austenitic stainless steel material commonly used in traditional technology.

[0015] The more appropriate diameter of the metal wire used to weave the metal mesh 20 is 0.1 mm.

[0016] The foaming ratio of the foam layer 10 is 10 to 30. The selection of the ratio is determined by the product installation space and the sound insulation requirements. If the installation space of the sound insulation pad under the car chassis is large, a material with a high ratio can be selected under the same sound insulation requirements. Conversely, if the space is small, a material with a low ratio should be selected.

Claims

1. A car battery sound insulation pad, comprising a foam layer (10) located between the battery and the chassis, a metal mesh (20) being provided inside the foam layer (10), the mesh surface of the metal mesh (20) extending along the plane of the foam layer (10), characterized in that: The metal mesh (20) is formed by interlaced weaving of metal wires and the mesh number of the metal mesh (20) is 20 to 200 meshes.

2. The car battery sound insulation pad according to claim 1, characterized in that: At least two layers of metal meshes (20) are sequentially arranged in the thickness direction of the foam layer (10), and the hole areas of two adjacent metal meshes (20) are staggered.

3. The car battery sound insulation pad according to claim 1, characterized in that: The mesh number of the metal mesh (20) is 100 meshes.

4. The automobile battery sound insulation pad according to claim 1, characterized in that: The metal wire used for weaving the metal mesh (20) is ferrite stainless steel wire.

5. The automobile battery sound insulation pad according to claim 1, characterized in that: The diameter of the metal wire used for weaving the metal mesh (20) is 0.1 mm.

6. The automobile battery sound insulation pad according to claim 1, characterized in that: The foaming ratio of the foam layer (10) is 10 to 30 times.

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