Battery box body frame for bottom supporting protection, battery box body and vehicle

Abstract

The utility model discloses a battery box body frame for bottom supporting protection, a battery box body and a vehicle, and relates to the technical field of new energy automobile box body equipment, the battery box body frame comprises a supporting plate serving as a main body structure of the battery box body frame, and the supporting plate is an L-shaped supporting plate with arc-shaped corners; an energy-absorbing plate is arranged on the outer edge of the arc-shaped corner of the supporting plate, the energy-absorbing plate and the supporting plate are integrally formed in an extrusion mode, and a protective layer is arranged on the surface of the outer edge of the energy-absorbing plate. According to the utility model, the support plate, the energy absorption plate and the protective layer are designed to form the arc-shaped frame, so that a part of transverse extrusion force can be converted into upward force when the support bottom is cut in, the mechanical damage to the box body is reduced, the deformation of the energy absorption plate is reduced, the stress is reduced, the deformation and damage of the box body are avoided, and the welding failure is avoided; and the design of the frame of the battery box body with light weight, low cost and high safety is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicle box equipment, in particular to a battery box frame, a battery box and a vehicle for bottom protection. Background Art

[0002] The statements here only provide the background art related to the utility model, and do not necessarily constitute the prior art.

[0003] Nowadays, new energy vehicles mainly electric vehicles are developing rapidly, and the sales volume of electric vehicles is increasing rapidly. As the core power supply component of electric vehicles, the safety problem of the battery pack is becoming increasingly prominent. The bottoming condition is a situation that often occurs during vehicle driving, that is, the vehicle chassis encounters the ground or ground protrusions during driving, or the vehicle passes over a speed bump, hits the curb, the top of an uphill, drives on a potholed road, or runs over a stone or brick on the road surface, etc., and bottoming may occur. In addition, the situation where a stone is thrown up by the wheel and hits the vehicle bottom also belongs to the bottoming condition. For traditional fuel vehicles, the main hazards of bottoming are the deformation of the oil pan, the deformation of the exhaust pipe, the deformation of the suspension components, and the damage of the transmission mechanism, etc., and usually it will not cause personal injury to the occupants; while for pure electric vehicles with power batteries arranged under the floor, the bottom surface of the power battery is not protected by the vehicle body structure and has a large area, and is more likely to be scratched and impacted. The bottoming condition is likely to cause damage to the power battery, and even catch fire and explode in severe cases, seriously endangering the safety of the passengers. Moreover, the damage caused by bottoming is at the bottom of the battery, which is not easy to detect and has a certain degree of concealment. At present, the commonly used battery boxes in electric vehicles are welded by straight aluminum profiles, and the box body has low strength and is easily extruded and deformed during bottoming, resulting in welding failure, and the cost of adding a separate protective part outside the battery box is relatively high. Therefore, how to effectively avoid the damage and seal failure of the power battery box under the bottoming condition is extremely urgent. Summary of the Utility Model

[0004] In view of the above problems and defects existing in the prior art, the utility model provides a battery box frame, a battery box and a vehicle for bottom protection. By designing an arc-shaped structure frame composed of a support plate, an energy-absorbing plate and a protective layer, a battery box frame design with light weight, low cost and high safety is realized. This frame design can convert a part of the lateral extrusion force into an upward force when the bottoming cuts in, so as to reduce the mechanical damage to the box body itself. Moreover, when bottoming occurs, the energy-absorbing plate deforms to reduce stress, avoid the deformation and damage of the box body, and further avoid welding failure, thus ensuring safety.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In the first aspect, the utility model provides a battery box frame for bottom protection.

[0007] A battery box frame for bottom protection, comprising a support plate as the main structure of the battery box frame. The support plate is an L-shaped support plate with an arc at the corner. An energy-absorbing plate is provided at the outer edge of the arc corner of the L-shaped support plate. The energy-absorbing plate is integrally extruded with the support plate, and a protective layer is provided on the outer surface of the energy-absorbing plate.

[0008] In a further technical solution, the long side of the L-shaped support plate serves as the side plate of the battery box, and the short side of the L-shaped support plate is fixedly connected to the bottom plate of the battery box on the same horizontal plane.

[0009] In a further technical solution, the energy-absorbing plate protrudes from the surface of the side plate and the bottom plate of the battery box. The energy-absorbing plate has a certain arc, and the arc of the energy-absorbing plate is the same as that of the support plate.

[0010] In a further technical solution, a protective coating material is sprayed on the outer surface of the energy-absorbing plate to form a protective layer; the protective coating material is selected from PVC materials.

[0011] In a further technical solution, a high-strength metal plate with an arc is fixedly installed on the outer surface of the energy-absorbing plate as the protective layer, and the arc of the high-strength metal plate is the same as that of the energy-absorbing plate.

[0012] In a further technical solution, the thickness of the protective layer is 0.5 - 1.5 mm.

[0013] In a further technical solution, the support plate and the energy-absorbing plate are hollow inside and are provided with a plurality of support ribs.

[0014] In a further technical solution, the angle of the support ribs provided inside the energy-absorbing plate is 20° - 60°.

[0015] In a second aspect, the present utility model proposes a battery box.

[0016] A battery box, comprising a plurality of battery box frames for bottom protection as described in the first aspect and a bottom plate. A plurality of frames and bottom plates are welded to form a box frame.

[0017] In a third aspect, the present utility model proposes a vehicle.

[0018] A vehicle, comprising a battery box as described in the second aspect.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] The present utility model provides a battery box frame for underbody protection, a battery box and a vehicle. It is designed that a support plate, an energy-absorbing plate and a protective layer form an arc-shaped frame. The protective coating avoids gravel impact. When the underbody is hit, the energy-absorbing plate deforms to reduce stress. The structural support plate provides the strength of the body to prevent the box from deforming and being damaged, which may affect the safety of the battery cells and the welding failure and affect the airtightness. When the underbody is cut in, the arc-shaped frame can convert a part of the lateral extrusion force into an upward force to reduce the mechanical damage to the box body, so as to realize the design of a battery box frame with lightweight, low cost and high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The attached drawings forming a part of this utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0022] Figure 1 is a schematic cross-sectional structure view of the battery box frame for underbody protection in the present utility model;

[0023] Figure 2 is a test schematic view of the battery box frame in the present utility model under the underbody condition;

[0024] Figure 3 is a schematic structure view of the battery box including the battery box frame for underbody protection in the present utility model.

[0025] Among them, 1. protective layer; 2. energy-absorbing plate; 3. support plate; 100. battery box frame; 200. underbody test tooling. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] It should be noted that the following detailed description is illustrative and is intended to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Embodiment 1

[0029] As Figure 1As shown in the figure, the utility model discloses a battery box frame 100 for bottom protection, which includes a support plate 3, an energy absorption plate 2 and a protective layer 1. Among them, the support plate 3 is the main structure of the battery box frame; the support plate 3 is an L-shaped support plate with an arc at the corner. An energy absorption plate 2 is provided at the outer edge of the arc corner of the support plate 3. The energy absorption plate 2 is integrally extruded with the support plate 3, and a protective layer 1 is provided on the outer surface of the energy absorption plate 2.

[0030] As an implementation method, a protective coating material is sprayed on the outer surface of the energy absorption plate 2 to form a protective layer 1. The protective coating material is selected from PVC materials, and the thickness of the sprayed protective layer is 0.5-1.5 mm; as another implementation method, a high-strength metal plate with a curvature is used as the protective layer 1 and is fixedly installed on the outer surface of the energy absorption plate 2. The curvature of the high-strength metal plate is the same as that of the energy absorption plate, and the thickness of the high-strength metal plate is 0.5-1.5 mm. By the above method of setting the protective layer, stone impact can be avoided, and when the bottom is towed, the energy absorption plate deforms, reducing stress.

[0031] Furthermore, the support plate 3 is the main structure of the battery box frame 100. The long side of the L-shaped support plate serves as the side plate of the battery box, and the short side of the L-shaped support plate is fixedly connected to the bottom plate of the battery box on the same horizontal plane. In the present utility model, the short side of the L-shaped support plate is welded to the bottom plate of the battery box on the same horizontal plane. Through the above design, the support plate 3 serves as a frame structure and plays a certain supporting role to form a battery box with higher strength. On the basis of the above design, the energy absorption plate 2 protrudes from the side plate surface and the bottom plate surface of the battery box, and the energy absorption plate 2 has a certain curvature, and the curvature of the energy absorption plate is the same as that of the support plate.

[0032] As an implementation method, the support plate 3 and the energy absorption plate 2 are hollow inside and are provided with multiple support ribs to further strengthen the strength of the structure. Among them, multiple support ribs are provided inside the energy absorption plate 2, and the angle of the provided support ribs (this angle is the included angle between the support rib and the horizontal plane) is 20°-60°. As Figure 1 shown, two support ribs are provided inside the energy absorption plate 2. Through this design, multiple cavities are formed inside the energy absorption plate for energy absorption, so as to avoid problems such as box body deformation and damage, affecting the safety of the battery core, and welding failure, and avoid affecting airtightness.

[0033] As Figure 2 shown, the above battery box frame 100 is tested under the bottom towing condition. The battery box frame 100 collides with the bottom towing test tooling 200. Through the above design, when the bottom towing cuts in, the bottom towing test tooling 200 collides with the arc-shaped protective layer 1 and the energy absorption plate 2. This arc-shaped structure can convert a part of the lateral extrusion force into an upward force, thereby effectively changing the extrusion direction, reducing the mechanical damage to the box body itself, and avoiding safety problems caused by damage.

[0034] Embodiment 2

[0035] The present utility model provides a battery box body, which includes a plurality of battery box body frames and bottom plates for bottom protection as proposed in Embodiment 1. As Figure 3 shown, a plurality of battery box body frames 100 and the bottom plate are welded to form a box body frame, which can effectively avoid deformation and damage under the bottoming condition and ensure safety performance.

[0036] Furthermore, considering that when the vehicle runs into bottoming, it is often the front side frame of the battery box body that first collides with the bottoming object and then gets damaged. Therefore, to further reduce costs, the battery box body frame for bottom protection proposed in Embodiment 1 is used only as the front side frame of the battery box body, and then a conventional battery box body frame and bottom plate are welded to form a box body frame. Through this design, it can not only effectively slow down the collision damage of bottoming to the battery box body, but also reduce the manufacturing cost of the battery box body.

[0037] Preferably, the battery box body frame for bottom protection proposed in Embodiment 1 can also be used as the rear side frame of the battery box body to avoid damage caused by possible bottoming conditions when the vehicle reverses.

[0038] Embodiment 3

[0039] The present utility model provides a vehicle, which includes the battery box body as proposed in Embodiment 2.

[0040] Through the above lightweight, low-cost and high-safety battery box body frame design, it can effectively reduce the mechanical damage of the bottoming condition to the box body itself and improve safety performance.

[0041] Although the specific implementation manners of the present utility model are described above in conjunction with the drawings, it is not a limitation to the protection scope of the present utility model. Those skilled in the art should understand that based on the technical solutions of the present utility model, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present utility model.

Claims

1. A battery box frame for bottom protection, characterized in that, It includes a support plate that serves as the main structure of the battery box frame. The support plate is an L-shaped support plate with an arc-shaped corner. An energy-absorbing plate is provided at the outer edge of the arc-shaped corner of the L-shaped support plate. The energy-absorbing plate is integrally extruded with the support plate, and a protective layer is provided on the outer surface of the energy-absorbing plate.

2. The battery box frame for bottom protection according to claim 1, wherein The long side of the L-shaped support plate serves as the side plate of the battery box, and the short side of the L-shaped support plate is fixedly connected to the bottom plate of the battery box on the same horizontal plane.

3. The battery box frame for bottom protection according to claim 2, characterized in that, The energy-absorbing plate protrudes from the surface of the side plate and the bottom plate of the battery box. The energy-absorbing plate has a certain curvature, and the curvature of the energy-absorbing plate is the same as that of the support plate.

4. The battery box frame for bottom protection according to claim 1, characterized in that, A protective coating material is sprayed on the outer surface of the energy-absorbing plate to form a protective layer; the protective coating material is selected from PVC material.

5. The battery box frame for bottom protection according to claim 1, characterized in that A high-strength metal plate with a curvature is fixedly installed on the outer surface of the energy-absorbing plate as a protective layer, and the curvature of the high-strength metal plate is the same as that of the energy-absorbing plate.

6. The battery box frame for bottom protection according to claim 1, characterized in that, The thickness of the protective layer is 0.5 - 1.5 mm.

7. A battery box frame for bottom protection according to claim 1, characterized in that, The support plate and the energy-absorbing plate are hollow inside and are provided with multiple support ribs.

8. A battery box frame for bottom protection according to claim 7, characterized in that, The angle of the support ribs provided inside the energy-absorbing plate is 20° - 60°.

9. A battery box body, characterized in that, It includes a number of battery box frames and bottom plates for bottom protection as described in any one of claims 1 - 8. A number of frames and bottom plates are welded to form a box frame.

10. A vehicle, characterized in that, It includes a battery box as described in claim 9.

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