New energy automobile composite material bottom protection plate and new energy automobile

Abstract

The utility model discloses a composite material bottom protection plate of a new energy automobile and the new energy automobile. The composite material bottom protection plate of the new energy automobile comprises an aluminum alloy layer, the primer layer is arranged on the surface of the aluminum alloy layer; the damping layer is arranged on the side, away from the aluminum alloy layer, of the primer layer; the composite layer is arranged on the side, away from the primer layer, of the damping layer. Therefore, the damping layer can play a buffering role so as to reduce the influence of external gravel impact on the bottom guard plate, and the integrity of the structure of the bottom guard plate is kept. Compared with a traditional plastic bottom protection plate, the composite material bottom protection plate of the new energy automobile can further have high strength and is safer and more reliable, and in addition, compared with a traditional metal bottom protection plate, the composite material bottom protection plate of the new energy automobile is lighter and more convenient to use. And the influence on the endurance mileage of the new energy automobile can also be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, in particular to a composite material bottom guard plate for a new energy vehicle and a new energy vehicle. Background Art

[0002] The battery pack of a new energy electric vehicle is usually installed at the bottom of the vehicle, and the bottom of the vehicle is easily impacted by external hard objects such as stones during driving. Therefore, it is usually necessary to set certain protective measures at the bottom of the battery pack to avoid surface damage and electrolyte leakage caused by impact on the battery pack.

[0003] The current underbody guards are generally made of plastic or metal. Plastic underbody guards are not strong enough and are prone to cracks after a collision. If the impact is strong, they may not even protect the battery, causing damage to the battery. Metal underbody guards have improved structural strength and better protection than plastic underbody guards, but they are heavier and seriously affect the range of new energy vehicles. Utility Model Content

[0004] In view of the above existing situation, the present invention provides a new energy vehicle composite material bottom guard plate and a new energy vehicle, which can have a better protective effect and are lighter.

[0005] In order to achieve the above-mentioned objectives, the first aspect of the utility model provides a new energy vehicle composite underbody guard plate, which includes: an aluminum alloy layer; a primer layer, the primer layer is arranged on the surface of the aluminum alloy layer; a damping layer, the damping layer is arranged on the side of the primer layer away from the aluminum alloy layer; and a composite layer, the composite layer is arranged on the side of the damping layer away from the primer layer.

[0006] In the composite underbody guard plate for new energy vehicles involved in the utility model, optionally, the free loss factor of the damping layer is greater than 1.5.

[0007] In the composite underbody guard plate of new energy vehicles involved in the utility model, optionally, the material of the aluminum alloy layer is one of a first-series aluminum alloy, a second-series aluminum alloy, a third-series aluminum alloy, a fourth-series aluminum alloy, a fifth-series aluminum alloy, and a sixth-series aluminum alloy.

[0008] In the composite underbody guard plate for new energy vehicles involved in the utility model, optionally, the adhesion between the primer layer and the aluminum alloy layer is greater than or equal to 10 MPa.

[0009] In the composite underbody guard plate of a new energy vehicle involved in the utility model, optionally, the composite layer includes at least two layers.

[0010] In the composite material bottom guard plate for new energy vehicles involved in the utility model, optionally, the composite layer includes a slow-reaction high-strength polyurea layer and a reinforcing fiber layer.

[0011] In the composite material bottom guard plate for new energy vehicles involved in the utility model, optionally, the slow-reaction high-strength polyurea layer includes a first slow-reaction high-strength polyurea layer and a second slow-reaction high-strength polyurea layer; the reinforcing fiber layer is arranged between the first slow-reaction high-strength polyurea layer and the second slow-reaction high-strength polyurea layer.

[0012] In the composite material bottom guard plate for new energy vehicles involved in the utility model, optionally, the reinforcing fiber layer includes at least one of fiberglass cloth, carbon fiber cloth, and aramid fiber cloth.

[0013] In the composite material bottom guard plate for new energy vehicles involved in the utility model, optionally, the ratio of the thickness of the damping layer to the thickness of the composite layer is less than 1:2.

[0014] The second aspect of the present utility model provides a new energy vehicle, which includes the composite material bottom guard plate for new energy vehicles as described above.

[0015] The composite material bottom guard plate for new energy vehicles involved in the present utility model includes an aluminum alloy layer, a primer layer, a damping layer, and a composite layer. Among them, the setting of the damping layer can play a buffering role to reduce the impact of external sand and stone impacts on the bottom guard plate and maintain the integrity of the bottom guard plate structure. Compared with traditional plastic bottom guard plates, the composite material bottom guard plate for new energy vehicles involved in the present utility model can also have higher strength, be safer and more reliable. In addition, compared with traditional metal bottom guard plates, the composite material bottom guard plate for new energy vehicles involved in the present utility model is lighter and can also reduce the impact on the cruising range of new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, where the same reference numerals in the following description represent the same parts.

[0018] Figure 1 It is a schematic diagram showing the overall structure of the composite material bottom guard plate for new energy vehicles involved in the present application.

[0019] Figure 2It is a schematic diagram showing the overall structure of the composite layer involved in the present application.

[0020] Figure numerals: 1, aluminum alloy layer; 2, primer layer; 3, damping layer; 4, composite layer; 41, first slow-reacting high-strength polyurea layer; 42, second slow-reacting high-strength polyurea layer; 43, reinforcing fiber layer. DETAILED DESCRIPTION

[0021] Hereinafter, with reference to the accompanying drawings, the preferred embodiments of the present application are described in detail. In the following description, the same symbols are given to the same components, and repeated descriptions are omitted. In addition, the accompanying drawings are only schematic diagrams, and the ratio of the sizes of the components to each other or the shapes of the components may be different from the actual ones. It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0023] The battery pack of a new energy electric vehicle is usually installed at the bottom of the vehicle, and the bottom of the vehicle is easily impacted by external hard objects such as stones during driving. Therefore, it is usually necessary to set certain protective measures at the bottom of the battery pack to avoid surface damage and electrolyte leakage caused by impact on the battery pack.

[0024] In view of the above technical problems in the prior art, Figure 1 and Figure 2 The present application provides a composite underbody guard plate for a new energy vehicle, which comprises: an aluminum alloy layer 1, a primer layer 2, a damping layer 3 and a composite layer 4. The primer layer 2 is arranged on the surface of the aluminum alloy layer 1; the damping layer 3 is arranged on the side of the primer layer 2 away from the aluminum alloy layer 1; and the composite layer 4 is arranged on the side of the damping layer 3 away from the primer layer 2.

[0025] According to the above structure, the present application provides a new energy vehicle composite underbody guard plate, in which the damping layer 3 is arranged to play a buffering role, so as to reduce the impact of external sand and stone on the underbody guard plate, and maintain the integrity of the underbody guard plate structure. Compared with the traditional plastic underbody guard plate, the new energy vehicle composite underbody guard plate involved in the utility model can also have higher strength, be safer and more reliable. In addition, compared with the traditional metal underbody guard plate, the new energy vehicle composite underbody guard plate involved in the utility model is lighter and can also reduce the impact on the cruising range.

[0026] As an embodiment, the free loss factor of the damping layer 3 is greater than 1.5. Thus, when the damping layer 3 is impacted by external sand and gravel, it can effectively absorb and disperse vibration energy, reduce the transmission of vibration, reduce the impact on the bottom guard plate due to vibration, and ensure the integrity of the bottom guard plate structure.

[0027] As an embodiment, the adhesion between the primer layer 2 and the aluminum alloy layer is greater than or equal to 10 MPa. Thus, there can be a strong connection relationship between the primer layer 2 and the aluminum alloy layer 1, ensuring a firm connection between the primer and the aluminum alloy layer 1 and enhancing the overall structural stability of the bottom guard plate.

[0028] As an embodiment, the composite layer 4 includes at least two layers of structure. In some examples, the structure of the composite layer 4 can be a two-layer structure, a three-layer structure, or composed of a larger number of layer structures.

[0029] As an embodiment, the composite layer 4 includes a slow-reaction high-strength polyurea layer and a reinforcing fiber layer 43. Among them, the slow-reaction high-strength polyurea layer is sprayed with slow-reaction high-strength polyurea, and its gel time is greater than 2 minutes. Thus, this makes the spraying process easier to control, reduces running and dripping, and helps to obtain a more uniform coating. In addition, the tensile strength of the slow-reaction high-strength polyurea is greater than 20 MPa, enabling it to withstand a large tensile force without being easily broken, the elongation at break is greater than 200, it can have good flexibility and elasticity, and the hardness is greater than 50D, enabling it to resist a certain degree of wear and scratch.

[0030] Referring to Figure 2 , as an embodiment, the slow-reaction high-strength polyurea layer includes a first slow-reaction high-strength polyurea layer 41 and a second slow-reaction high-strength polyurea layer 42; the reinforcing fiber layer 43 is disposed between the first slow-reaction high-strength polyurea layer 41 and the second slow-reaction high-strength polyurea layer 42.

[0031] As an embodiment, the reinforcing fiber layer 43 includes at least one of fiberglass cloth, carbon fiber cloth, and aramid fiber cloth. Among them, fiberglass cloth, as a reinforcing material, is mainly used to improve the strength and stiffness of the composite material, and at the same time has good thermal stability and electrical insulation. Carbon fiber cloth has excellent mechanical properties and is light in weight. Aramid fiber cloth has good toughness and durability and can withstand a certain impact.

[0032] As an embodiment, the ratio of the thickness of the damping layer 3 to the thickness of the composite layer 4 is less than 1:2. Among them, the specific ratio will be set to different values according to the actual application requirements. In some examples, the ratio can also be 1:3, 1:4, 1:5, etc.

[0033] As an embodiment, the material of the aluminum alloy layer 1 is one of the first series aluminum alloy, the second series aluminum alloy, the third series aluminum alloy, the fourth series aluminum alloy, the fifth series aluminum alloy, and the sixth series aluminum alloy. Among them, the first series aluminum alloy is an alloy close to pure aluminum; the second series aluminum alloy is mainly a copper-aluminum alloy, with certain strength and hardness; the third series aluminum alloy takes manganese as the main alloying element, with good formability, weldability and corrosion resistance; the fourth series aluminum alloy is mainly a silicon-aluminum alloy, with high strength and hardness, as well as good heat resistance and wear resistance; the fifth series aluminum alloy is a magnesium-aluminum alloy, with high strength, hardness and good formability; the sixth series aluminum alloy is mainly an alloy of magnesium and silicon, with excellent corrosion resistance, oxidation resistance, weldability and formability.

[0034] Specifically, the implementation of the new energy vehicle composite bottom guard plate involved in the present application includes the following steps:

[0035] S1: Use 3003 aluminum alloy layer 1 with a thickness of 0.5 mm, and perform roughening treatment on the surface with 60-mesh sandpaper.

[0036] S2: Spray primer on the aluminum alloy layer 1 to form a primer layer 2, and control the thickness of the primer layer 2 within 50 - 80 μm.

[0037] S3: Use a damping layer 3 and adopt a spraying process, and control the thickness of the damping layer 3 within 0.5 mm.

[0038] S4: Use slow-reaction high-strength polyurea and carbon fiber cloth. Among them, the unit weight of the carbon fiber cloth is 200 g / ㎡, the thickness is 0.1 mm, and the tensile strength is ≥3400 MPa. After spraying 0.5 mm of slow-reaction high-strength polyurea on the damping layer 3, paste a layer of carbon fiber cloth, and then spray 0.5 mm of polyurea coating again.

[0039] S5; Carry out curing treatment.

[0040] The second aspect of the present application provides a new energy vehicle, which includes the new energy vehicle composite bottom guard plate as above. It can be understood that the new energy vehicle including the new energy vehicle composite bottom guard plate as above also includes all the beneficial effects of the new energy vehicle composite bottom guard plate as above.

[0041] In summary, the new energy vehicle composite bottom guard plate involved in the present application includes an aluminum alloy layer 1, a primer layer 2, a damping layer 3 and a composite layer 4. Among them, the setting of the damping layer 3 can play a buffering role to reduce the impact of external sand and stone impacts on the bottom guard plate and maintain the integrity of the bottom guard plate structure. Compared with the traditional plastic bottom guard plate, the new energy vehicle composite bottom guard plate involved in the present utility model can also have higher strength, be safer and more reliable. In addition, compared with the traditional metal bottom guard plate, the new energy vehicle composite bottom guard plate involved in the present utility model is lighter in weight and can also reduce the impact on the cruising range of the new energy vehicle.

[0042] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed 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 one or more features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0043] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0044] The embodiments, implementation manners and related technical features of the present application can be combined and replaced with each other without conflict.

[0045] The above are only the preferred embodiments of the present application and do not impose any form of limitation on the present application. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

[0046] Although the present utility model has been specifically described above in conjunction with the drawings and the implementation manners, it can be understood that the above description does not limit the present utility model in any form. Those skilled in the art can make deformations and changes to the present utility model according to needs without departing from the essential spirit and scope of the present utility model, and these deformations and changes all fall within the scope of the present utility model.

Claims

1. A composite bottom guard plate for a new energy vehicle, characterized in that, include: Aluminum alloy layer; A primer layer, the primer layer being disposed on the surface of the aluminum alloy layer; A damping layer, the damping layer being arranged on a side of the primer layer away from the aluminum alloy layer; The composite layer is arranged on a side of the damping layer away from the primer layer.

2. The composite bottom guard plate for new energy vehicles according to claim 1, characterized in that, The free loss factor of the damping layer is greater than 1.

5.

3. The composite bottom guard plate for new energy vehicles according to claim 1, characterized in that , the adhesion between the primer layer and the aluminum alloy layer is greater than or equal to 10MPa.

4. The composite bottom guard plate for new energy vehicles according to claim 1, characterized in that , the composite layer includes at least two layers.

5. The composite bottom guard plate for new energy vehicles according to claim 1, wherein , the composite layer includes a slow-reacting high-strength polyurea layer and a reinforcing fiber layer.

6. The composite bottom guard plate for new energy vehicles according to claim 5, wherein , the slow-reaction high-strength polyurea layer includes a first slow-reaction high-strength polyurea layer and a second slow-reaction high-strength polyurea layer; The reinforcing fiber layer is disposed between the first slow-reacting high-strength polyurea layer and the second slow-reacting high-strength polyurea layer.

7. The composite bottom guard plate for new energy vehicles according to claim 5, characterized in that , the reinforcing fiber layer includes at least one of glass fiber cloth, carbon fiber cloth, and aramid fiber cloth.

8. The composite bottom guard plate for new energy vehicles according to claim 1, wherein , the ratio of the thickness of the damping layer to the thickness of the composite layer is less than 1:

2.

9. The composite bottom guard plate for new energy vehicles according to claim 1, characterized in that The material of the aluminum alloy layer is one of a first-series aluminum alloy, a second-series aluminum alloy, a third-series aluminum alloy, a fourth-series aluminum alloy, a fifth-series aluminum alloy, and a sixth-series aluminum alloy.

10. A new energy vehicle, characterized in that, It comprises a composite bottom guard plate for a new energy vehicle as described in any one of claims 1 to 9.

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