Battery pack bottom protection plate and vehicle

Abstract

The utility model relates to a battery pack bottom protection plate and a vehicle. The battery pack bottom protection plate comprises a first fiber fabric layer, a balsa wood plate, a metal plate and a second fiber fabric layer which are arranged in sequence, and the first fiber fabric layer, the balsa wood plate, the metal plate and the second fiber fabric layer are arranged in parallel; the first fiber fabric layer, the balsa wood plate, the metal plate and the second fiber fabric layer are of an integrated structure, and the first fiber fabric layer is located on the side, facing a battery pack, of the bottom protection plate. The battery pack bottom protection plate has the advantages of being light in weight, good in mechanical performance, high in strength, low in cost and capable of improving the impact protection capacity of the bottom of a battery pack and reducing the weight of a vehicle, and therefore the power consumption of vehicle running is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of the bottom guard plate of an automotive battery pack, in particular to a bottom guard plate of a battery pack and a vehicle. Background Technique

[0002] The bottom guard plate of a new energy vehicle is mainly made of materials such as manganese steel and aluminum magnesium alloy. The bottom guard plate of the battery pack is installed on the chassis of the vehicle. Due to the heavy weight of the bottom guard plate itself, the vehicle weight is increased, and the power consumption during vehicle driving is increased. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related technologies to some extent. For this reason, an embodiment of the utility model provides a bottom guard plate of a battery pack, which has the characteristics of light weight, good mechanical properties and high strength, low cost, can improve the impact protection ability at the bottom of the battery pack, reduce the weight of the vehicle, and thus reduce the power consumption during vehicle driving.

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

[0005] The bottom guard plate of the battery pack in the embodiment of the utility model comprises a first fiber fabric layer, a balsa wood board, a metal plate and a second fiber fabric layer arranged in sequence. The first fiber fabric layer, the balsa wood board, the metal plate and the second fiber fabric layer are arranged in parallel, and the first fiber fabric layer, the balsa wood board, the metal plate and the second fiber fabric layer are of an integral structure.

[0006] The bottom guard of the battery pack in the embodiment of the utility model adopts a double-layer fiber fabric layer, a balsa wood board and a metal plate to integrally form a composite board product. When the composite bottom guard plate is cut, local board shedding is not likely to occur, and the composite degree of the bottom guard plate is high. The bottom guard plate uses a double-layer fiber fabric layer to encapsulate the metal plate, saving process costs such as electrophoresis and PVC coating, and reducing a part of the overall part cost of the bottom guard plate. Moreover, by using a double-layer fiber fabric layer and a balsa wood board, the weight of the bottom guard plate can be reduced, the strength and mechanical properties of the bottom guard plate can be improved, so that while the bottom guard plate is lightweight, it has good mechanical properties and strength, and can also meet the requirements of flame retardancy and corrosion resistance. Compared with the overall use of an aluminum plate or other metal plates in the related technologies, the material cost can be greatly saved. In addition, the deformability of the balsa wood and the metal plate is good, so that the forming efficiency of the bottom guard plate is high and the cost advantage is great.

[0007] In some embodiments, the metal plate is a steel plate.

[0008] In some embodiments, the thickness of the basswood board is 0.7 - 0.9 mm, the thickness of the metal plate is 0.6 - 0.8 mm, the thickness of the first fiber fabric layer is 0.4 - 0.6 mm, and the thickness of the second fiber fabric layer is 0.4 - 0.6 mm.

[0009] In some embodiments, the bottom protection plate of the battery pack further includes a reinforcing raised layer, which is arranged on the first fiber fabric layer and is used to support the bottom of the battery pack. The reinforcing raised layer and the first fiber fabric layer are of an integral structure.

[0010] In some embodiments, the reinforcing raised layer is a third fiber fabric layer.

[0011] In some embodiments, the third fiber fabric layer is a prepreg.

[0012] In some embodiments, the thickness of the reinforcing raised layer is 0.4 - 0.6 mm.

[0013] In some embodiments, both the first fiber fabric layer and the second fiber fabric layer are glass fiber fabrics.

[0014] In some embodiments, both the first fiber fabric layer and the second fiber fabric layer are prepregs.

[0015] A vehicle according to an embodiment of the present invention includes the bottom protection plate of the battery pack according to any of the above embodiments.

[0016] The vehicle according to the embodiment of the present invention has the advantages of light weight and low power consumption during driving, and strong impact protection ability at the bottom of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the bottom protection plate of the battery pack according to the embodiment of the present invention.

[0018] Reference Signs:

[0019] Bottom protection plate 100, first fiber fabric layer 1, basswood board 2, metal plate 3, second fiber fabric layer 4, reinforcing raised layer 5. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] As Figure 1As shown in the figure, the battery pack bottom protection plate 100 of the embodiment of the present utility model includes a first fiber fabric layer 1, a balsa wood board 2, a metal plate 3, and a second fiber fabric layer 4 arranged in sequence. The first fiber fabric layer 1, the balsa wood board 2, the metal plate 3, and the second fiber fabric layer 4 are arranged in parallel, and the first fiber fabric layer 1, the balsa wood board 2, the metal plate 3, and the second fiber fabric layer 4 are of an integral structure. The first fiber fabric layer 1 is located on the side of the bottom protection plate 100 facing the battery pack.

[0022] The first fiber fabric layer 1 and the second fiber fabric layer 4 have good corrosion resistance, high heat resistance, and high mechanical strength, and also have the advantage of being lightweight. Compared with metal plates, they are lighter in weight and higher in strength, and can improve the strength of the bottom protection plate 100 and reduce the weight of the bottom protection plate 100. The balsa wood board 2 has a porous structure and a small density, has the advantages of being light in weight and large in structural strength, is easy to be shaped and cut, is convenient for processing and forming, and can improve the stiffness and overall performance of the plate when combined with the fiber fabric layer. At the same time, the porous characteristics of the balsa wood board 2 endow the balsa wood board 2 with vibration absorption and heat insulation characteristics, which is beneficial to reducing the noise conduction ability of the bottom protection plate 100 and the heat conduction effect of the bottom protection plate 100, thereby being beneficial to reducing the conduction of noise and temperature into the carriage and improving the comfort in the carriage. The metal plate 3 has good deformation performance and can be formed and processed.

[0023] The manufacturing process of the battery pack bottom protection plate 100 of the embodiment of the present utility model is as follows:

[0024] Step 1: According to the drawing of the battery pack bottom protection plate 100, cut the sizes of the first fiber fabric layer 1, the balsa wood board 2, the metal plate 3, and the second fiber fabric layer 4.

[0025] Step 2: In a preforming mold, sequentially place the first fiber fabric layer 1, the balsa wood board 2, the metal plate 3, and the second fiber fabric layer 4, and perform the preforming process of the bottom protection plate 100 to form a preform.

[0026] Step 3: In an injection mold, sequentially place the preforms of the first fiber fabric layer 1, the preform of the balsa wood board 2, the preform of the metal plate 3, and the preform of the second fiber fabric layer 4, and then inject resin into the forming mold. The temperature of the injection mold is 70 - 180°C, and the vacuum degree is not greater than -0.085 MPa.

[0027] Step 4: The heating time of the injection mold is 3 - 5 min, and then start to demold.

[0028] Step 5: Cut off the waste edges of the battery pack bottom protection plate 100 product to complete the production process.

[0029] The battery pack bottom guard plate 100 of the embodiment of the present utility model is integrally formed by a double-layer fiber fabric layer (i.e., the first fiber fabric layer 1 and the second fiber fabric), balsa wood board 2, and metal plate 3 to form a composite board product. When the composite bottom guard plate 100 is cut, local board shedding is not likely to occur, and the composite degree of the bottom guard plate 100 is high. The bottom guard plate 100 uses a double-layer fiber fabric layer to encapsulate the metal plate 3, saving process costs such as electrophoresis and PVC coating, and reducing a part of the overall part cost of the bottom guard plate 100. Moreover, by using a double-layer fiber fabric layer and balsa wood board 2, the weight of the bottom guard plate 100 can be reduced, the strength and mechanical properties of the bottom guard plate 100 can be improved, so that while the bottom guard plate 100 achieves lightweight, it has good mechanical properties and strength, and can also meet the requirements of flame retardancy and corrosion resistance. Compared with the overall use of aluminum plates or other metal plates 3 in the related art, the material cost can be greatly saved. Furthermore, the deformability of balsa wood and metal plate 3 is good, making the forming efficiency of the bottom guard plate 100 high and having a large cost advantage.

[0030] Therefore, the battery pack bottom guard plate 100 of the embodiment of the present utility model has the characteristics of light weight, good mechanical properties, and high strength, low cost, can improve the impact protection ability at the bottom of the battery pack, reduce the weight of the vehicle, and thus reduce the power consumption during vehicle driving.

[0031] In some embodiments, the metal plate 3 is a steel plate.

[0032] In some embodiments, both the first fiber fabric layer 1 and the second fiber fabric layer 4 are glass fiber fabrics. Compared with some other fiber fabrics, glass fiber fabrics have the advantages of lightweight and high strength, can further reduce the weight of the bottom guard plate 100, improve the strength and mechanical properties of the bottom guard plate 100, and have lower costs, which is beneficial to reducing the processing and manufacturing cost of the bottom guard plate 100.

[0033] In some embodiments, both the first fiber fabric layer 1 and the second fiber fabric layer 4 are prepregs. Then, when preparing the bottom guard plate 100 of the embodiment of the present utility model, after step 2, the preforms of the first fiber fabric layer 1 and the second fiber fabric layer 4 made are impregnated with resin, then heated and pre-cured, and then step 3 is carried out. 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 layer, which can improve the combined strength of the first fiber fabric layer 1, balsa wood board 2, metal plate 3, and the second fiber fabric layer 4, that is, improve the composite degree and strength of the bottom guard plate 100.

[0034] In some embodiments, the thickness of the balsa wood board 2 is 0.7 - 0.9 mm, the thickness of the metal plate 3 is 0.6 - 0.8 mm, the thickness of the first fiber fabric layer 1 is 0.4 - 0.6 mm, and the thickness of the second fiber fabric layer 4 is 0.4 - 0.6 mm. For example, the thickness of the balsa wood board 2 is 0.7 mm, 0.8 mm or 0.9 mm, the thickness of the metal plate 3 is 0.6 mm, 0.7 mm or 0.8 mm, the thickness of the first fiber fabric layer 1 is 0.4 mm, 0.5 mm or 0.6 mm, and the thickness of the second fiber fabric layer 4 is 0.4 mm, 0.5 mm or 0.6 mm.

[0035] Specifically, the thickness of the balsa wood board 2 is 0.5 mm, the thickness of the steel plate is 0.7 mm, and the thicknesses of the first fiber fabric layer 1 and the second fiber fabric layer 4 are both 0.5 mm. When performing the falling ball impact test, under the impact of a 16 - mm - diameter ball head, the bottom guard plate 100 of the embodiment of the present utility model has stronger protection ability than an aluminum plate with a thickness of 3 mm.

[0036] In some embodiments, the bottom guard plate 100 further includes a reinforcing protrusion layer 5. The reinforcing protrusion layer 5 is provided on the first fiber fabric layer 1. The reinforcing protrusion layer 5 is used to support the bottom of the battery pack. The reinforcing protrusion layer 5 and the first fiber fabric layer 1 are of an integral structure. The reinforcing protrusion layer 5 protrudes from the surface of the first fiber fabric layer 1 to form a protruding portion of the bottom guard plate 100 to support the battery pack. The reinforcing protrusion layer 5 increases the thickness of the bottom guard plate 100 at the bottom corresponding to the battery pack, not only increasing the strength of the bottom guard plate 100 but also increasing the supporting strength of the bottom guard plate 100 for the battery pack.

[0037] In some embodiments, the reinforcing protrusion layer 5 is a third fiber fabric layer. That is to say, the reinforcing protrusion layer 5 and the first fiber fabric layer 1 are both fiber fabrics, thus facilitating the connection and integral molding of the reinforcing protrusion layer 5 and the first fiber fabric layer 1, ensuring the integrity of the reinforcing protrusion layer 5 and the first fiber fabric layer 1, and thus being able to ensure the composite degree of the bottom guard plate 100.

[0038] Specifically, the reinforcing protrusion layer 5 is a glass fiber fabric layer, further facilitating the connection and integral molding of the reinforcing protrusion layer 5 and the first fiber fabric layer 1, further ensuring the integrity of the reinforcing protrusion layer 5 and the first fiber fabric layer 1, and thus being able to further ensure the composite degree of the bottom guard plate 100. When performing step 1, cut the first fiber fabric layer 1 provided with the reinforcing protrusion layer 5 according to the design requirements.

[0039] Specifically, the thickness of the reinforcing protrusion layer 5 is 0.4 - 0.6 mm. For example, the thickness of the reinforcing protrusion layer 5 is 0.4 mm, 0.5 mm or 0.6 mm.

[0040] Furthermore, the third fiber fabric layer is a prepreg. When impregnating the first fiber fabric layer 1 with resin, the reinforcing protrusion layer 5 on the first fiber fabric layer 1 is simultaneously impregnated with resin to form a prepreg. Thereby, the bonding strength and integrity between the reinforcing protrusion layer 5 and the first fiber fabric layer 1 are further improved, and the composite degree and strength of the bottom guard plate 100 are further enhanced.

[0041] The vehicle of the embodiment of the present utility model includes a battery pack bottom guard plate 100.

[0042] Therefore, the vehicle of the embodiment of the present utility model has the advantages of light weight and low power consumption during driving, and strong impact protection ability at the bottom of the battery pack.

[0043] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "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. It is only for the convenience of describing the present utility model 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 thus cannot be understood as a limitation to the present utility model.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. 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 situations.

[0046] 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 horizontal height of the first feature is higher than that of 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 horizontal height of the first feature is less than that of the second feature.

[0047] In the present utility model, the terms "an embodiment", "some embodiments", "example", "specific example", 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0048] 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 battery pack bottom guard plate (100), characterized in that: The invention comprises a first fiber fabric layer (1), a balsa wood board (2), a metal plate (3) and a second fiber fabric layer (4) which are arranged in sequence; the first fiber fabric layer (1), the balsa wood board (2), the metal plate (3) and the second fiber fabric layer (4) are arranged in parallel; and the first fiber fabric layer (1), the balsa wood board (2), the metal plate (3) and the second fiber fabric layer (4) form an integrated structure.

2. The battery pack bottom guard plate (100) according to claim 1, characterized in that: The metal plate (3) is a steel plate.

3. The battery pack bottom guard plate (100) according to claim 1, characterized in that: The thickness of the balsa wood board (2) is 0.7-0.9 mm, the thickness of the metal plate (3) is 0.6-0.8 mm, the thickness of the first fiber fabric layer (1) is 0.4-0.6 mm, and the thickness of the second fiber fabric layer (4) is 0.4-0.6 mm.

4. The battery pack bottom guard plate (100) according to claim 1, characterized in that: It further comprises a reinforcing protrusion layer (5), wherein the reinforcing protrusion layer (5) is arranged on the first fiber fabric layer (1), the reinforcing protrusion layer (5) is used to support the bottom of the battery pack, and the reinforcing protrusion layer (5) and the first fiber fabric layer (1) are an integral structure.

5. The battery pack bottom guard plate (100) according to claim 4, characterized in that: The reinforcing protrusion layer (5) is a third fiber fabric layer.

6. The battery pack bottom guard plate (100) according to claim 5, characterized in that: The third fiber fabric layer is prepreg.

7. The battery pack bottom guard plate (100) according to claim 4, characterized in that: The thickness of the reinforcing raised layer (5) is 0.4-0.6 mm.

8. The battery pack bottom guard plate (100) according to claim 1, characterized in that: The first fiber fabric layer (1) and the second fiber fabric layer (4) are both glass fiber fabrics.

9. The battery pack bottom guard plate (100) according to claim 1, characterized in that: The first fiber fabric layer (1) and the second fiber fabric layer (4) are both prepregs.

10. A vehicle, characterized in that: It comprises a battery pack bottom protective plate (100) according to any one of claims 1 to 9.

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