An inlaid sandwiched bottom guard plate structure

Abstract

The application discloses an embedded sandwich bottom protection plate structure, which comprises a foam sandwich, a steel net structure, an upper skin and a lower skin, the steel net structure is embedded in the foam sandwich, and the upper skin and the lower skin are both made of composite glass fiber material; the upper skin is fixedly connected to the top of the foam sandwich, and the lower skin is fixedly connected to the bottom of the foam sandwich; the application has simple structure and can meet the requirements of national standards.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicle battery box technology, and in particular relates to an embedded sandwich bottom protective plate structure. Background Technology

[0002] Existing battery pack bottom protection plate structures mostly fall into two categories: steel plate stamping + PVC coating or aluminum alloy welding + PVC coating. Both solutions, in addition to the original, require the use of mica sheets / paper, PC insulation sheets, or other functional materials, resulting in higher overall weight, more parts and functional materials, complex assembly processes, and lower cost-effectiveness. With the upgrading of national standards for battery packs, the requirements for the bottom of the enclosure are becoming increasingly stringent. For some bottom protection plate solutions, the need for energy impacts of 550J, 800J, or even over 1000J (including vertical and oblique impacts) and other more demanding operating conditions will be considered. The existing metal bottom protection plate solutions cannot meet the new national standard requirements within the effective space at the bottom of the battery cells and cold plate. Utility Model Content

[0003] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0004] In order to overcome the shortcomings of the prior art, the present invention provides an embedded sandwich bottom protection plate structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an embedded sandwich bottom protective plate structure, comprising a foam core, a steel mesh structure, an upper skin and a lower skin, wherein the steel mesh structure is embedded in the foam core, and both the upper skin and the lower skin are composite fiberglass materials; the upper skin is fixedly connected to the top of the foam core, and the lower skin is fixedly connected to the bottom of the foam core.

[0006] Furthermore, the thickness of the foam core is 3-15mm.

[0007] Furthermore, the thickness of the upper skin is 0.6-1.8 mm.

[0008] Furthermore, the thickness of the lower skin is 0.6-1.8 mm.

[0009] Furthermore, the steel mesh structure and the foam sandwich core are integrally molded.

[0010] Furthermore, the foam core is integrally molded with the upper and lower skins using the HP-RTM / WCM process.

[0011] The advantages of this invention are: it provides a simple embedded sandwich bottom protection plate structure that meets national standards and its processing technology. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0013] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0014] In the attached diagram:

[0015] Figure 1 This is a schematic diagram of the embedded sandwich bottom cover plate structure in one embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the mesh-like flow channels on the steel mesh structure of the present invention.

[0017] The meanings of the reference numerals in the figure are as follows:

[0018] 1. Foam core; 2. Steel mesh structure; 3. Upper skin; 4. Lower skin. Detailed Implementation

[0019] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0020] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0021] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0022] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0023] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0024] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figure 1 As shown, an embedded sandwich bottom panel structure includes a foam core 1, a steel mesh structure 2, an upper skin 3, and a lower skin 4. The foam core 1 has a thickness of 3-15mm and is a rigid structure. The steel mesh structure 2 is embedded inside the foam core 1, and the steel mesh structure 2 and the foam core 1 are integrally formed by foaming. The upper skin 3 and the lower skin 4 are both made of composite fiberglass material, and the thickness of the upper and lower skins 4 is 0.6-1.8mm. The upper skin 3 is fixed to the top of the foam core 1, and the lower skin 4 is fixed to the bottom of the foam core 1. The foam core 1, the upper skin 3, and the lower skin 4 are integrally formed by processes such as HP-RTM / WCM / PCM.

[0026] Due to its steel mesh structure, it can withstand higher energy impacts, resulting in better overall bottom plate rigidity. It also boasts low density and light weight, simultaneously providing advantages such as insulation, corrosion resistance, flame retardancy, sealing, and weight reduction. The one-piece molded bottom plate components eliminate cumbersome assembly processes, making the process simple and efficient.

[0027] The table below compares the embedded sandwich bottom plate structure of this application with the simulation analysis structure of ordinary metal bottom plates. The simulation data was obtained by using Hypermesh for preprocessing and ABAQUS or LS-Dyna for postprocessing.

[0028]

[0029] In another aspect, this application also provides a processing method for producing the embedded sandwich bottom panel structure as described above, comprising the following steps:

[0030] The steel mesh structure is placed into an aluminum alloy mold and foamed into a single piece to form a foam sandwich.

[0031] Injecting filling resin into the surface of the foam sandwich core;

[0032] Connect the upper skin and the lower skin to the foam core;

[0033] The connected upper and lower skins are cured to obtain the product's bottom protective plate.

[0034] like Figure 2 As shown, the foam core undergoes surface processing before being filled with resin, resulting in a grid-like resin flow channel on the surface of the foam core.

[0035] Specifically, the grid-like resin channels on the surface of the foam core can be formed by machining the surface with surface processing equipment to create grooves, or by in-mold foaming (i.e., the mold has grid features).

[0036] By setting up a grid-like flow channel, resin flow channels are created in the structure, increasing the coating range of the core surface during the molding process of HP-RTM and other processes combined with composite skin. This allows the resin to be completely filled on the large surface of the entire sandwich bottom panel, and there are no quality defects after the product is molded and demolded, such as dry spots, pitting, or incomplete wetting.

[0037] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. An embedded sandwich bottom cover structure, characterized in that: It includes a foam core, a steel mesh structure, an upper skin, and a lower skin. The steel mesh structure is embedded in the foam core. The upper skin and the lower skin are both made of composite fiberglass material. The upper skin is fixed to the top of the foam core, and the lower skin is fixed to the bottom of the foam core.

2. The embedded sandwich bottom cover structure according to claim 1, characterized in that: The thickness of the foam core is 3-15mm.

3. The embedded sandwich bottom cover structure according to claim 1, characterized in that: The thickness of the upper skin is 0.6-1.8 mm.

4. The embedded sandwich bottom cover structure according to claim 1, characterized in that: The thickness of the lower skin is 0.6-1.8 mm.

5. The embedded sandwich bottom cover structure according to claim 1, characterized in that: The steel mesh structure and the foam core are integrally molded.

6. The embedded sandwich bottom cover structure according to claim 1, characterized in that: The foam core is integrally formed with the upper and lower skins using the HP-RTM / WCM process.

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