New energy automobile battery pack bottom protection plate

Abstract

The utility model relates to a new energy automobile battery pack bottom protection plate which comprises a first bottom protection plate body, a second bottom protection plate body and a sandwich core material, and the sandwich core material is arranged between the first bottom protection plate body and the second bottom protection plate body; the first bottom protection plate and the second bottom protection plate are both made of thermosetting carbon fiber composite materials; the first bottom protection plate, the second bottom protection plate and the sandwich core material are integrally formed to obtain the new energy automobile battery pack bottom protection plate. The weight of the bottom protection plate can be reduced, meanwhile, sufficient strength and rigidity are kept, excellent corrosion resistance is achieved, safety can be better guaranteed, and the overall performance and economical efficiency of a vehicle can be improved.

Description

Technical Field

[0001] The present application relates to the field of automobile lightweight technology, and in particular to a bottom guard plate for a battery pack of a new energy vehicle. Background Art

[0002] In traditional new energy vehicle designs, battery underbody guards are usually made of steel plates. The main reason for this practice is to ensure the strength and durability of the battery underbody guards, thereby protecting the battery pack from damage from the external environment. However, this practice also leads to an increase in the curb weight of new energy vehicles, because metal materials such as steel plates are relatively heavy. Metal underbody guards will increase the overall weight of the vehicle, which in turn affects the vehicle's energy consumption and endurance. Metal materials are prone to corrosion when exposed to humid environments for a long time, which may shorten the service life of the underbody guard. In the field of new energy vehicles, the lightweight design of the battery underbody guard is particularly critical, because it is not only related to the performance of the vehicle, but also directly affects the safety and life of the battery pack. Utility Model Content

[0003] (1) Technical problems to be solved

[0004] The present application provides a bottom guard plate for a battery pack of a new energy vehicle, which overcomes some shortcomings of traditional steel or aluminum plate battery bottom guard plates, while meeting the requirements of new energy vehicles for lightweight, corrosion resistance and safety.

[0005] (2) Technical solution

[0006] The present application provides a bottom guard plate for a new energy vehicle battery pack, comprising a first bottom guard plate, a second bottom guard plate and a sandwich core material, wherein the sandwich core material is arranged between the first bottom guard plate and the second bottom guard plate; the first bottom guard plate and the second bottom guard plate are both made of thermosetting carbon fiber composite materials, and the sandwich core material is made of balsa wood material; the first bottom guard plate, the second bottom guard plate and the sandwich core material are integrally formed to obtain the bottom guard plate for the new energy vehicle battery pack.

[0007] Furthermore, the light wood material is balsa wood.

[0008] Furthermore, a plurality of bushing holes are provided on the four edges of the bottom guard plate of the new energy vehicle battery pack, and the bushing holes are used to install metal bushings.

[0009] Furthermore, it also includes a plurality of metal bushings, each of which is installed in the corresponding bushing hole.

[0010] Furthermore, the metal bushing and the bushing hole are bonded with structural adhesive.

[0011] Furthermore, the bottom guard plate of the new energy vehicle battery pack is connected to the vehicle frame through the metal bushing and bolts.

[0012] Furthermore, the metal bushing is an aluminum alloy bushing.

[0013] Furthermore, the first bottom guard plate, the second bottom guard plate and the sandwich core material are integrally formed by a negative grinding molding process.

[0014] (3) Beneficial effects

[0015] The above technical solution of this application has the following advantages:

[0016] The bottom guard plate of the battery pack of a new energy vehicle provided in the present application adopts a composite sandwich structure in which the upper and lower outer skins are thermosetting carbon fibers to make the battery bottom guard plate. This design significantly improves the rigidity and mechanical properties of the bottom guard plate. Compared with metal materials, carbon fibers have superior strength and environmental resistance. The design of the balsa wood sandwich structure not only enhances the rigidity of the battery guard plate, but also improves its stability and durability under various environmental conditions, thereby effectively protecting the battery from damage by external impact and corrosion. Balsa wood is lightweight and has a large elastic modulus and low procurement cost compared to other sandwich core materials. While maintaining structural strength, it helps to reduce the cost of raw materials. This choice of material and structure provides higher safety and longer service life for the battery bottom guard plate, while also having better cost advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 Schematic diagram of the bottom guard plate of the new energy vehicle battery pack provided in this application;

[0019] Figure 2 Schematic diagram of the decomposition of the bottom guard plate of the new energy vehicle battery pack provided in this application.

[0020] Figure numerals: 1. first bottom guard plate; 2. second bottom guard plate; 3. sandwich core material; 4. bushing hole; 5. metal bushing. DETAILED DESCRIPTION

[0021] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0024] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized.

[0025] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a bottom guard plate for a new energy vehicle battery pack, comprising a first bottom guard plate 1, a second bottom guard plate 2 and a sandwich core material 3, wherein the sandwich core material 3 is arranged between the first bottom guard plate 1 and the second bottom guard plate 2; the first bottom guard plate 1 and the second bottom guard plate 2 are both made of thermosetting carbon fiber composite materials, and the sandwich core material 3 is made of balsa wood material; the first bottom guard plate 1, the second bottom guard plate 2 and the sandwich core material 3 are obtained by integrally molding to obtain the bottom guard plate for the new energy vehicle battery pack.

[0027] The battery underbody shield of new energy vehicles plays a vital role in ensuring battery safety. Traditional underbody shields are often made of conventional materials such as steel or aluminum, which present several drawbacks. The application of advanced composite materials is a key area for achieving lightweight automotive design. Composite materials are composed of two or more different materials. By optimizing the material combination, they can achieve excellent mechanical properties, lightweight characteristics, and cost-effectiveness.

[0028] In the application of battery underbody panels, composite materials can provide sufficient stiffness and strength while reducing weight, contributing to the overall lightweighting of the vehicle. Carbon fiber reinforced composite materials (CFRP) have been widely used in the design of battery underbody panels for new energy vehicles due to their high strength, low weight, and excellent corrosion resistance.

[0029] Lightweight, high-strength advanced composite materials have become a solution to these problems. They can reduce the weight of the underbody shield while maintaining sufficient strength and rigidity, and have excellent corrosion resistance. Through these improvements, the underbody shield of new energy vehicles can not only better ensure safety, but also improve the overall performance and economy of the vehicle.

[0030] In some embodiments, the balsa wood material is balsa wood.

[0031] like Figure 2 As shown, in some embodiments, a plurality of bushing holes 4 are provided on the four edges of the bottom guard plate of the new energy vehicle battery pack, and the bushing holes 4 are used to install metal bushings 5.

[0032] like Figure 2 As shown, in some embodiments, a plurality of metal bushings 5 ​​are further included, and each of the metal bushings 5 ​​is installed in the corresponding bushing hole 4 respectively.

[0033] In some embodiments, the metal bushing 5 and the bushing hole 4 are bonded with structural adhesive.

[0034] In some embodiments, the bottom guard plate of the new energy vehicle battery pack is connected to the vehicle frame through the metal bushing 5 and bolts.

[0035] In some embodiments, the metal bushing 5 is an aluminum alloy bushing.

[0036] In some embodiments, the first bottom guard plate 1, the second bottom guard plate 2 and the sandwich core material 3 are integrally formed by a negative grinding molding process.

[0037] With increasingly stringent global requirements for energy conservation and emissions reduction, and consumers' expectations for vehicle performance constantly increasing, the automotive industry faces immense pressure to find new solutions. Against this backdrop, lightweight design of automotive components has become a key research direction. By adopting new materials and advanced manufacturing technologies, automakers can reduce the overall weight of vehicles, thereby improving energy efficiency, increasing driving range, and enhancing vehicle handling performance.

[0038] The battery pack underbody shield for new energy vehicles provided in this embodiment of the application features a sandwich structure with upper and lower skins. The upper and lower skins, namely the first underbody shield 1 and the second underbody shield 2, are both made of carbon fiber prepreg. The sandwich core 3 is made of balsa wood, specifically balsa wood. Metal bushings 5 ​​are bolted to the battery panels. Aluminum alloy bushings are used at the vehicle frame connection for easy installation and removal. Structural adhesive is used to bond the aluminum alloy bushings to the bushing holes 4 in the battery pack underbody shield.

[0039] Composite materials are typically much lighter than metals, which helps reduce the vehicle's overall weight, thereby increasing energy efficiency, extending driving range, and improving handling. While composite materials may be lighter than some metals, they generally possess high stiffness and strength, effectively protecting the battery pack from external impacts and scratches. Carbon fiber materials offer excellent corrosion resistance, protecting the battery underbody shield even in harsh environments and extending its service life.

[0040] Composite materials can be designed to have better energy absorption properties, better absorbing impact energy in a vehicle collision, thereby protecting the battery pack and passengers. Composite battery underbody guards not only improve the overall performance of new energy vehicles, but also help automakers meet strict emission standards while providing consumers with a safer and more economical driving experience.

[0041] Those skilled in the art will clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. In addition, the specific names of the functional units and modules are only for the purpose of distinguishing each other and are not used to limit the scope of protection of this application.

[0042] It should be noted that the various embodiments in this specification are described in a progressive manner. Reference can be made to the same or similar parts between the various embodiments. Each embodiment focuses on the differences from other embodiments. This application is not limited to the specific structures described above and shown in the figures. Furthermore, for the sake of brevity, detailed descriptions of known methods and technologies are omitted here.

[0043] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A new energy vehicle battery pack bottom guard plate, characterized in that: It includes a first bottom guard plate, a second bottom guard plate and a sandwich core material, and the sandwich core material is arranged between the first bottom guard plate and the second bottom guard plate; the first bottom guard plate and the second bottom guard plate are both made of thermosetting carbon fiber composite materials, and the sandwich core material is made of balsa wood material; the first bottom guard plate, the second bottom guard plate and the sandwich core material are integrally formed to obtain the bottom guard plate of the new energy vehicle battery pack.

2. The bottom guard plate of the new energy vehicle battery pack according to claim 1, characterized in that: The light wood material is balsa wood.

3. The bottom guard plate of the new energy vehicle battery pack according to claim 1, characterized in that: A plurality of bushing holes are provided on the four edges of the bottom guard plate of the new energy vehicle battery pack, and the bushing holes are used for installing metal bushings.

4. The bottom guard plate of the new energy vehicle battery pack according to claim 3, characterized in that: It also includes a plurality of metal bushings, each of which is installed in a corresponding bushing hole.

5. The bottom guard plate of the new energy vehicle battery pack according to claim 4, characterized in that: The metal bushing and the bushing hole are bonded with structural adhesive.

6. The bottom guard plate of the new energy vehicle battery pack according to claim 4, characterized in that: The bottom guard plate of the new energy vehicle battery pack is connected to the vehicle frame through the metal bushing and bolts.

7. The bottom guard plate of the new energy vehicle battery pack according to claim 4, characterized in that: The metal bushing is an aluminum alloy bushing.

8. The bottom guard plate of the new energy vehicle battery pack according to claim 1, characterized in that: The first bottom guard plate, the second bottom guard plate and the sandwich core material are integrally formed by adopting a negative grinding molding process.

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