Power battery bottom protection plate, protection structure, power battery and vehicle

Abstract

The utility model relates to a power battery bottom protection plate which is an integrally formed piece and comprises a bottom protection plate body and lug parts arranged on the peripheral side of the bottom protection plate body, and connecting points used for being connected with the protection plate are arranged on the lug parts. The utility model further provides a protection structure. The utility model also provides a power battery. The utility model further provides a vehicle. According to the utility model, the problem that the position precision of the protection plate mounting bracket does not reach the standard due to welding deformation accumulation is avoided, and the problem that the rigidity of the protection plate mounting bracket is reduced due to the substandard welding seam quality is also avoided.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a power battery bottom protection plate, a protective structure, a power battery, and a vehicle. Background Technology

[0002] Some new energy vehicles are equipped with underbody protection plates to protect the power battery, reducing damage to the battery and ensuring its stability and safety. For example, patent application CN210092158U discloses a power battery pack underbody protection plate structure and a vehicle equipped with it.

[0003] In addition to the underbody protection plate, some vehicles are also equipped with a protective plate to cover the gap between the power battery and the vehicle body. A mounting bracket for connecting the protective plate is usually installed on the power battery. This mounting bracket is typically an independent structure, fixed to the power battery housing by welding. This mounting bracket structure has the following technical problems: weld burn-through and air leakage are prone to occur during the welding process, which can adversely affect the stability and safety of the power battery; after repair welding, cumulative welding deformation can occur, making it difficult to achieve the required positional accuracy of the mounting bracket, especially at the connection points of the protective plate on the mounting bracket; and substandard weld quality may also lead to a reduction in the rigidity of the mounting bracket. Utility Model Content

[0004] The purpose of this utility model is to provide a power battery bottom protection plate, a protective structure, a power battery, and a vehicle to alleviate or eliminate at least one of the above-mentioned technical problems.

[0005] The present invention relates to a bottom protection plate for a power battery, wherein the bottom protection plate is an integrally molded part, the bottom protection plate includes a bottom protection plate body and an ear portion disposed on the periphery of the bottom protection plate body, and the ear portion is provided with a connection point for connecting the protective plate.

[0006] Optionally, the ear portion includes a first segment extending upward from the outer edge of the bottom cover body and a second segment extending outward from the end of the first segment, the connection point being disposed on the second segment.

[0007] Optionally, the ear is provided with a first connection hole for connecting the protective plate.

[0008] Optionally, the bottom protective plate body is provided with a plurality of ears on its periphery.

[0009] Optionally, the bottom guard plate body includes a body plate portion and a connecting edge disposed on the periphery of the body plate portion, the connecting edge being used to connect to the housing of the power battery, and the root end of the ear portion being connected to the outer edge of the connecting edge.

[0010] Optionally, the connecting edge is provided with multiple reinforcing ribs; the main body plate is provided with a concave-convex reinforcing structure.

[0011] Optionally, the power battery bottom cover is an integrally formed part made of metal sheet by stamping.

[0012] This utility model also proposes a protective structure, including a protective plate and a power battery bottom protection plate as described in any of the above claims, wherein the protective plate is connected to the ear.

[0013] This utility model also proposes a power battery, including the power battery bottom protection plate described in any of the above claims.

[0014] This utility model also proposes a vehicle that includes the power battery underbody protection plate described in any of the above claims.

[0015] This invention avoids both the problem of substandard positional accuracy of the protective plate mounting bracket due to accumulated welding deformation and the problem of reduced rigidity of the protective plate mounting bracket due to substandard weld quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the power battery bottom protection plate described in some embodiments;

[0017] Figure 2 This is a schematic diagram of the protective structure described in some embodiments.

[0018] In the diagram, 1—bottom protective plate of the power battery, 2—first protective plate, 3—second protective plate, and 4—third protective plate.

[0019] 101—Main body plate, 102—Concave and convex reinforcing structure, 103—Front connecting edge, 104—Left connecting edge, 105—Right connecting edge, 106—Rear connecting edge, 107—Second connecting hole, 108—Reinforcing rib, 109—Ear, 110—Fastener;

[0020] 201—Third connecting hole, 202—Fourth connecting hole, 301—Fifth connecting hole, 302—Sixth connecting hole, 401—Seventh connecting hole, 402—Eighth connecting hole. Detailed Implementation

[0021] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0022] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0023] like Figure 1 The diagram shows a power battery bottom cover 1, which is an integrally molded part. The power battery bottom cover 1 includes a bottom cover body and ears 109 disposed on the periphery of the bottom cover body. The ears 109 are provided with connection points for connecting the protective plate. Using the above technical solution, the ears 109 can provide connection points for the protective plate, and since the bottom cover body and the ears 109 are integrally molded, welding is not required. This avoids the problem of substandard positional accuracy of the protective plate mounting bracket due to accumulated welding deformation, and also avoids the problem of reduced rigidity of the protective plate mounting bracket due to substandard weld quality.

[0024] In some embodiments, the ear portion 109 includes a first segment extending upward from the outer edge of the bottom guard plate body and a second segment extending outward from the end of the first segment, with a connection point disposed on the second segment. By employing the above technical solution, on the one hand, the structural strength and rigidity of the ear portion 109 can be improved; on the other hand, a space for accommodating the head of the fastener 110 can be formed on the lower side of the second segment, preventing the head of the fastener 110 from protruding downward and adversely affecting the vehicle's ground clearance.

[0025] As a specific example, the ear portion 109 is provided with a first connecting hole for connecting the protective plate, which constitutes the aforementioned connection point. The first connecting hole can be formed during the stamping process of the power battery bottom cover plate 1, making it easy to implement. In other embodiments, the connection point on the ear portion 109 can also adopt connection structures such as welded surfaces, projection weld nuts, and projection weld bolts.

[0026] In some embodiments, a plurality of ears 109 are provided on the periphery of the bottom protective plate body. Providing a plurality of ears 109 can provide multiple connection points for the protective plate, thereby improving the stability of the connection of the protective plate and facilitating the connection of multiple protective plates.

[0027] As a specific example, the bottom guard plate body is provided with multiple ears 109 on the front, left, right and rear sides respectively.

[0028] In some embodiments, the bottom protective plate body includes a body plate portion 101 and a connecting edge disposed around the body plate portion 101. The connecting edge is used to connect to the housing of the power battery, and the root end of the ear portion 109 is connected to the outer edge of the connecting edge. Connecting the bottom protective plate body to the frame of the power battery housing via the connecting edge ensures stable installation and provides stable support for the ear portion 109. In specific implementations, the connecting edge may be provided with multiple second connecting holes 107 for connecting to the frame of the power battery housing.

[0029] In some embodiments, a plurality of reinforcing ribs 108 are provided on the connecting edge, and the plurality of reinforcing ribs 108 are arranged sequentially at intervals along the length direction of the connecting edge, thereby improving the structural strength of the connecting edge.

[0030] In some embodiments, a concave-convex reinforcing structure 102 is provided on the body plate portion 101. The concave-convex reinforcing structure 102 can improve the structural strength of the body plate portion 101. The concave-convex reinforcing structure 102 can be formed by stamping and is easy to implement.

[0031] In some embodiments, the power battery bottom cover 1 is an integrally formed part made of metal sheet by stamping, which is easy to implement.

[0032] The aforementioned power battery bottom protector 1 is suitable for various types of power battery housings, such as aluminum alloy extruded profile battery housings and roll-formed battery housings. It is suitable for scenarios where there are multiple connection points on the same side of the power battery protective plate and the Z-direction height is basically consistent, and for scenarios where the connection points are located at the corners of the power battery or are few in number. The thickness of the power battery bottom protector 1 is generally 1.0mm or 0.8mm. Through CAE simulation, a Z-direction tensile test was conducted on the model of the power battery bottom protector 1. A single ear (109) can withstand a force of 1.6-2.1kN without deformation or breakage, ensuring the reliability of the protective plate installation.

[0033] like Figure 2 As shown, this utility model also proposes a protective structure, including a protective plate and the power battery bottom protection plate 1 described in any of the above claims, wherein the protective plate is connected to the ear portion 109. The protective plate and the ear portion 109 can be fixedly connected by fasteners 110, which can be bolts and rivet nuts.

[0034] As a specific example, such as Figure 2 As shown, multiple ears 109 are provided at the right connecting edge 105 of the power battery bottom cover plate 1, and multiple third connecting holes 201 are provided at the left edge of the first protective plate 2. The multiple third connecting holes 201 are connected to the multiple ears 109 by fasteners 110 to connect the first protective plate 2 to the right side of the power battery bottom cover plate 1. Multiple fourth connecting holes 202 are provided at the right edge of the first protective plate 2 for connecting to the right sill beam of the vehicle body. The first protective plate 2 can cover the gap between the power battery and the right sill beam. Similarly, multiple ears 109 can also be provided at the left connecting edge 104 of the power battery bottom cover plate 1, and the multiple ears 109 are used to connect the protective plate used to cover the gap between the power battery and the left sill beam.

[0035] As a specific example, such as Figure 2 As shown, multiple ears 109 are provided at the front connecting edge 103 of the power battery bottom cover plate 1, multiple fifth connecting holes 301 are provided at the rear edge of the second protective plate 3, and multiple seventh connecting holes 401 are provided at the rear edge of the third protective plate 4. The multiple fifth connecting holes 301 and multiple seventh connecting holes 401 are connected to the multiple ears 109 by fasteners 110, so as to connect the second protective plate 3 and the third protective plate 4 to the front side of the power battery bottom cover plate 1. The front edge of the second protective plate 3 is provided with multiple sixth connecting holes 302 for connecting to the front of the vehicle body, and the front edge of the third protective plate 4 is provided with multiple eighth connecting holes 402 for connecting to the front of the vehicle body. The second protective plate 3 and the third protective plate 4 can cover the gap between the power battery and the front of the vehicle body. Similarly, multiple ears 109 can also be provided at the rear connecting edge 106 of the power battery bottom cover plate 1, and the multiple ears 109 are used to connect the protective plate used to cover the gap between the power battery and the rear of the vehicle body.

[0036] This utility model also proposes a power battery, including the power battery bottom protection plate 1 described in any of the above claims.

[0037] This utility model also proposes a vehicle including the power battery underbody protection plate 1 described in any of the above claims.

[0038] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model. In the description of this specification, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A bottom protection plate for a power battery, characterized in that, The power battery bottom protection plate is an integrally molded part. The power battery bottom protection plate includes a bottom protection plate body and an ear (109) disposed on the periphery of the bottom protection plate body. The ear (109) is provided with a connection point for connecting the protective plate.

2. The power battery bottom protection plate according to claim 1, characterized in that, The ear portion (109) includes a first segment extending upward from the outer edge of the bottom guard body and a second segment extending outward from the end of the first segment, the connection point being disposed on the second segment.

3. The power battery bottom protection plate according to claim 1, characterized in that, The ear (109) is provided with a first connection hole for connecting the protective plate.

4. The power battery bottom protection plate according to claim 1, characterized in that, The bottom protective plate body is provided with a plurality of ears (109) on its periphery.

5. The power battery bottom protection plate according to claim 1, characterized in that, The bottom guard plate body includes a body plate portion (101) and a connecting edge disposed on the periphery of the body plate portion (101). The connecting edge is used to connect to the housing of the power battery. The root end of the ear portion (109) is connected to the outer edge of the connecting edge.

6. The power battery bottom protection plate according to claim 5, characterized in that, The connecting edge is provided with a plurality of reinforcing ribs (108); the main body plate (101) is provided with a concave-convex reinforcing structure (102).

7. The power battery bottom protection plate according to claim 1, characterized in that, The power battery bottom cover is a one-piece molded part formed by stamping metal sheet.

8. A protective structure, characterized in that, It includes a protective plate and a power battery bottom protection plate as described in any one of claims 1-7, wherein the protective plate is connected to the ear (109).

9. A power battery, characterized in that, Includes the power battery bottom protection plate as described in any one of claims 1-7.

10. A vehicle, characterized in that, Includes the power battery bottom protection plate as described in any one of claims 1-7.

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