Battery box

Abstract

The utility model relates to a battery box. The battery box comprises a battery box shell and a reinforcing structure, the reinforcing structure extends from one side of the wall body of the battery box shell to the other side of the wall body; the outer beam plate protrudes in the direction deviating from the wall body to form the first protruding structure, and the containing space of the inner lining plate is formed on one side of the first protruding structure, so that the outer beam plate is tightly connected with the inner lining plate, and the occupied space is small. The inner lining plate protrudes to form the second protruding structure, and the protruding direction of the second protruding structure is opposite to that of the first protruding structure, so that the reinforcing structure forms two protruding structures in opposite directions, and the modal of the battery box is remarkably improved.

Description

Technical Field

[0001] This application relates to the technical field of battery boxes, and particularly to a battery box. Background Art

[0002] In new energy vehicles, the battery is the main power source and also provides energy for many electric auxiliary systems. Therefore, the reliability, durability, safety, and working efficiency indicators of the battery box are directly related to the power performance of the vehicle. When designing the battery box structure, the extrusion, vibration, and shock performance indicators are often used as the main development basis. Therefore, in the process of optimizing the battery pack, modal optimization is extremely important.

[0003] Currently, many A00-class small cars are limited by the selling price and cost, and their sheet metal battery boxes have too low modal values, making it difficult to achieve low-cost improvement of the modal. Utility Model Content

[0004] In view of this, the embodiments of this application provide a battery box to solve the problem of too low modal values of the battery box in the background art.

[0005] The embodiments of this application provide a battery box, including:

[0006] A battery box housing;

[0007] A reinforcing structure, the reinforcing structure extending from one side of the wall body of the battery box housing to the other side; the reinforcing structure includes an outer beam plate and an inner lining plate, the outer beam plate is installed on the wall body of the battery box housing, the outer beam plate includes a first protruding structure, the first protruding structure protrudes in a direction away from the wall body, and a receiving space is formed between the first protruding structure and the wall body;

[0008] The inner lining plate is located in the receiving space and is fixed to the outer beam plate; the inner lining plate includes a second protruding structure, and the protruding direction of the second protruding structure is opposite to that of the first protruding structure.

[0009] In an optional embodiment, the first protruding structure further has a sub-protruding structure protruding in a direction away from the wall body, and the sub-protruding structure is arranged in alignment with the second protruding structure.

[0010] In an optional embodiment, the number of the sub-protruding structures is one or more;

[0011] When the number of the sub-protruding structures is one, the sub-protruding structure is located at the central position of the first protruding structure.

[0012] In an alternative embodiment, the second protruding structure includes a first flat portion and an inclined surface portion. The first flat portion is parallel to the wall body, and the inclined surface portion is located on both sides of the first flat portion and forms an obtuse angle with the first flat portion.

[0013] In an alternative embodiment, the first protruding structure includes a second flat portion and a first vertical surface portion. The second flat portion is parallel to the wall body, and the first vertical surface portion is located on both sides of the second flat portion and is perpendicular to the second flat portion.

[0014] In an alternative embodiment, the inner lining plate includes a third flat portion and a second vertical surface portion. One end of the third flat portion is connected to the edge of the second protruding structure, and the other end is connected to the second vertical surface portion; the third flat portion is attached to and fixedly connected to the second flat portion, the second vertical surface portion is located on both sides of the third flat portion and is perpendicular to the third flat portion, and the second vertical surface portion is attached to and fixedly connected to the first vertical surface portion.

[0015] In an alternative embodiment, the third flat portion and the second flat portion, and the second vertical surface portion and the first vertical surface portion are fixedly connected by welding.

[0016] In an alternative embodiment, both the third flat portion and the second flat portion are provided with process holes, and the process holes on the third flat portion are arranged in alignment with the process holes on the second flat portion.

[0017] In an alternative embodiment, both the outer beam plate and the inner lining plate are sheet metal parts.

[0018] In an alternative embodiment, the outer beam plate further includes an edge portion, the edge portion is located on both sides of the first protruding structure, and the edge portion has a plurality of hollowings.

[0019] The battery box provided by the embodiment of the present application has a strengthening structure, and the strengthening structure extends from one side of the wall body of the battery box housing to the other side; the outer beam plate protrudes in a direction away from the wall body to form a first protruding structure, and a receiving space for the inner lining plate is formed on one side of the first protruding structure, so that the outer beam plate and the inner lining plate are tightly connected, and the occupied space is small. The inner lining plate protrudes to form a second protruding structure, and the protruding direction of the second protruding structure is opposite to that of the first protruding structure. Thus, the strengthening structure forms two protruding structures with opposite directions, and the mode of the battery box is significantly improved.

[0020] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0021] The accompanying drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0022] Figure 1 Schematic diagram of the battery box structure provided by the embodiment of the present application;

[0023] Figure 2 Three-dimensional schematic diagram of the strengthening structure provided by the embodiment of the present application;

[0024] Figure 3 Front view of the strengthening structure provided by the embodiment of the present application;

[0025] Figure 4 is Figure 3 A-A cross-sectional view of the strengthening structure in

[0026] Figure 5 Schematic diagram of the connection relationship between the outer beam plate and the inner lining plate provided by the embodiment of the present application.

[0027] The reference numerals in the drawings are:

[0028] 1. Outer beam plate; 11. Edge part; 111. Hollow; 12. First protruding structure; 121. First vertical surface part; 122. Second planar part; 123. Sub-protruding structure;

[0029] 2. Inner lining plate; 21. Third planar part; 22. Second protruding structure; 221. Inclined surface part; 222. First planar part; 23. Second vertical surface part;

[0030] 3. Battery box housing; 30. Accommodating space; 31. Wall body;

[0031] 4. Process hole. Detailed implementation manners

[0032] In order to make the technical solutions and beneficial effects of the present utility model more obvious and understandable, the following will be described in detail by listing specific embodiments. Among them, the accompanying drawings are not necessarily drawn to scale, and local features can be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical and scientific fields to which the present application belongs.

[0033] In the description of the present utility model, the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of simplifying the description of the present utility model, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, that is, it cannot be understood as a limitation to the present utility model.

[0034] In the present utility model, the terms "first" and "second" are only used for the purpose of clear description and cannot be understood as indicating the relative importance of the indicated features or the number of the indicated technical features. Therefore, the features defined with "first" and "second" may clearly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc.; the meaning of "several" is at least one, such as one, two, three, etc., unless otherwise specifically defined.

[0035] In the present utility model, unless otherwise clearly defined, the terms "installed", "connected", "joined", "fixed", "set", etc. shall be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can also be the internal communication of two elements or the interaction relationship between two elements. 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 circumstances.

[0036] In the present utility model, unless otherwise clearly defined, the first feature on, above, over, or on the top of, under, beneath, below, or under the second feature may be that the first feature is in direct contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature on, above, or over 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 the horizontal height of the second feature. The first feature under, beneath, or below 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 the horizontal height of the second feature.

[0037] To thoroughly understand the present application, detailed steps and detailed structures will be presented in the following description to explain the technical solution of the present application. The preferred embodiments of the present application are described in detail as follows. However, in addition to these detailed descriptions, the present application may also have other embodiments.

[0038] A battery box, as Figures 1-4 shown, includes: a battery box housing 3 and a reinforcing structure. The reinforcing structure includes an outer beam plate 1 and an inner lining plate 2. The outer beam plate 1 is installed on the wall body 31 of the battery box housing 3, and the reinforcing structure extends from one side of the wall body 31 of the battery box housing 3 to the other side of the wall body 31; as Figure 4 shown, the outer beam plate 1 includes a first protruding structure 12, and the first protruding structure 12 protrudes in a direction away from the wall body 31 and forms a receiving space 30 with the wall body 31; the inner lining plate 2 is located in the receiving space 30; the inner lining plate 2 includes a second protruding structure 22, and the protruding direction of the second protruding structure 22 is opposite to that of the first protruding structure 12; the inner lining plate 2 is fixed to the outer beam plate 1.

[0039] As Figure 1 shown, the battery box housing 3 in this embodiment includes a wall body 31 that is generally rectangular, and side walls extending upward from the four sides of the wall body 31. The wall body 31 and the side walls jointly enclose a chamber for accommodating the battery. The reinforcing structure is located in this chamber, and both ends of the reinforcing structure are respectively adjacent to or connected to two opposite side walls of the housing 3. The wall body 31 is the wall surface with the largest area in the battery box housing 3. Installing the reinforcing structure on this wall body 31 can better ensure the strength of the battery box and reduce the possibility of deformation of the battery box. The battery box housing 3 in this application is not limited to Figure 1 the structure shown.

[0040] Exemplarily, the battery box in this embodiment is a sheet metal battery box for an A00-class car, but is not limited thereto. Among them, an A00-class car generally refers to a small or micro electric car in the German car classification standard.

[0041] Among them, as Figure 4 shown, the outer beam plate 1 includes an edge portion 11 and a first protruding structure 12; the edge portion 11 is located on both sides of the first protruding structure 12, and the edge portion 11 is used to abut against the wall body 31 of the battery box housing 3; the first protruding structure 12 arches along a first direction relative to the edge portion 11, and a receiving space 30 can be formed between one side of the first protruding structure 12 along a second direction and the wall body 31 of the battery box housing 3. The inner lining plate 2 includes an inner lining main body and a second protruding structure 22. The inner lining main body is located on both sides of the second protruding structure 22 and is fixed to the outer beam plate 1. The second protruding structure 22 arches along the second direction relative to the inner lining main body. In this embodiment, as Figure 4 , Figure 5 shown, the direction away from the wall body 31 is the first direction, the second direction is the opposite direction of the first direction, and the third direction is perpendicular to the first direction and the second direction. As Figure 1 , Figure 5 shown, the extending direction of the wall body 31 is the third direction.

[0042] The battery box provided by the embodiment of the present application has a strengthening structure, and the strengthening structure extends from one side of the wall body 31 of the battery box housing 3 to the other side of the wall body 31; the outer beam plate 1 protrudes in a direction away from the wall body 31 to form a first protruding structure 12, and a receiving space for the inner lining plate 2 is formed on one side of the first protruding structure 12, so that the outer beam plate and the inner lining plate are tightly connected, and the occupied space is small. The inner lining plate 2 protrudes to form a second protruding structure 22, and the protruding direction of the second protruding structure 22 is opposite to that of the first protruding structure 12. In this way, the strengthening structure forms two protruding structures with opposite directions, and the battery box mode is significantly improved.

[0043] In an alternative embodiment, as Figure 4 shown, the first protruding structure 12 further has a sub-protruding structure 123 protruding in a direction away from the wall body 31, and the sub-protruding structure 123 is arranged in alignment with the second protruding structure 22. The number of the sub-protruding structures 123 is one, and it is located at the center position of the first protruding structure 12. When the number of the sub-protruding structures 123 is designed to be one, the material cost and manufacturing difficulty are low, and by arranging it in alignment with the second protruding structure 22, protruding structures with opposite protruding directions are formed at the center position of the strengthening structure, and the battery box mode is further improved. In other embodiments, the number of the sub-protruding structures 123 can also be two or more.

[0044] In an alternative embodiment, as Figure 5 shown, the second protruding structure 22 includes a first flat portion 222 and an inclined surface portion 221. The first flat portion 222 is parallel to the wall body 31, and the inclined surface portion 221 is located on both sides of the first flat portion 222 and forms an obtuse angle with the first flat portion 222. In this embodiment, the first flat portion 222 is parallel to the wall body 31, which can increase the contact area when contacting the wall body 31 and improve the uniformity of force bearing; the inclined surface portion 221 located on both sides of the first flat portion 222 can transfer the force received by the first flat portion 222 to the inclined surface portions 221 on both sides. The structure in which the inclined surface portion 221 forms an obtuse angle with the first flat portion 222 can divide the force received by the inclined surface portion 221 into a first direction, a second direction or a third direction, that is, disperse the force in a single direction into a multi-directional force, which can avoid excessive force in a single direction and is beneficial to improving the mode.

[0045] In an alternative embodiment, as Figure 4As shown, the first protruding structure 12 includes a second planar portion 122 and a first vertical face portion 121. The second planar portion 122 is parallel to the wall body 31, and the first vertical face portion 121 is located on both sides of the second planar portion 122 and is perpendicular to the second planar portion 122. In this embodiment, the first vertical face portion 121 is located on both sides of the second planar portion 122, which can disperse the force on the second planar portion 122 to both sides. The first vertical face portion 121 is perpendicular to the second planar portion 122 and also perpendicular to the wall body 31. Therefore, when the wall body 31 is subjected to a vertical force, the first vertical face portion 121 can provide a large supporting force to prevent the wall body 31 from deforming.

[0046] In an alternative embodiment, as Figure 4 shown, the inner lining main body includes a third planar portion 21 and a second vertical face portion 23. One end of the third planar portion 21 is connected to the edge of the second protruding structure 22, and the other end is connected to the second vertical face portion 23. The third planar portion 21 is attached to and fixedly connected to the second planar portion 122. The second vertical face portion 23 is located on both sides of the third planar portion 21 and is perpendicular to the third planar portion 21. The second vertical face portion 23 is attached to and fixedly connected to the first vertical face portion 121. In this embodiment, the functions of the third planar portion 21 and the second vertical face portion 23 are to disperse the force received by the second protruding structure 22 to the second planar portion 122 and the first vertical face portion 121, avoiding the concentration of force on the second protruding structure 22 when the battery box is stressed, and improving the overall load-bearing capacity of the strengthening structure.

[0047] In an alternative embodiment, the third planar portion 21 and the second planar portion 122 are fixedly welded together, and the second vertical face portion 23 and the first vertical face portion 121 are fixedly welded together. In this embodiment, the welding and fixing method has low cost and is easy to operate, and can ensure the firmness of the fixation.

[0048] In an alternative embodiment, both the third planar portion 21 and the second planar portion 122 are provided with process holes 4, and the process holes 4 on the third planar portion 21 are arranged in alignment with the process holes 4 on the second planar portion 122. In this embodiment, the structure in which the process holes 4 of both are arranged in alignment can facilitate the use of the resistance spot welding process to fixedly weld the third planar portion 21 and the second planar portion 122, and the second vertical face portion 23 and the first vertical face portion 121.

[0049] In an alternative embodiment, both the outer beam plate 1 and the inner lining plate 2 are sheet metal parts. In this embodiment, the method of obtaining both the outer beam plate 1 and the inner lining plate 2 by using sheet metal can greatly reduce the manufacturing cost, and the structures of the outer beam plate 1 and the inner lining plate 2 in this embodiment can be completely obtained by sheet metal, and the process difficulty is relatively low, which is conducive to industrialization.

[0050] In an alternative embodiment, as Figure 3As shown, the edge portion 11 has a number of hollow portions 111. In this embodiment, the structure of the hollow portions 111 can reduce the overall weight of the reinforcement structure and achieve weight reduction of the battery box.

[0051] In an alternative embodiment, as Figure 4 shown, the width of the second protruding structure 22 is greater than the width of the sub-protruding structure 123. In this embodiment, the second protruding structure 22 is designed to be wider and the sub-protruding structure 123 is designed to be narrower, so as to make the best use of the space in the accommodation space 30. The larger the volume of the sub-protruding structure 123, the greater the impact on the volume of the battery box. Therefore, the volume of the sub-protruding structure 123 is designed to be as small as possible. This design fully considers the space requirements of each part of the battery box and is conducive to increasing the volume of the battery box.

[0052] According to the analysis of the deflection calculation formula, the Figure 4 and Figure 5 cross-sectional shapes shown have reached an optimal state. When the impact force is constant, the deflection value is significantly lower than that of the traditional design. According to the simulation results, this cross-sectional shape increases the modal of the battery box by 10 Hz. It can be seen that the reinforcement structure of this embodiment enhances the modal of the battery box.

[0053] It should be understood that the above embodiments are all exemplary and do not cover all possible implementation manners included in the claims. Without departing from the scope of the present disclosure, various deformations and changes can be made on the basis of the above embodiments. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form additional embodiments of the present application that may not be clearly described. Therefore, the above embodiments only represent several implementation manners of the present application and do not limit the protection scope of the patent of the present application.

Claims

1. A battery box, characterized in that: include: Battery box housing (3); A reinforcement structure, the reinforcement structure extending from one side of the wall body (31) of the battery box housing (3) to the other side of the wall body (31); the reinforcement structure comprises an outer beam plate (1) and an inner lining plate (2); the outer beam plate (1) is mounted on the wall body (31) of the battery box housing (3); the outer beam plate (1) comprises a first protruding structure (12); the first protruding structure (12) protrudes in a direction away from the wall body (31) and forms a receiving space (30) with the wall body (31); The inner lining plate (2) is located in the accommodating space (30) and is fixed to the outer beam plate (1); the inner lining plate (2) comprises a second protruding structure (22), and the protruding direction of the second protruding structure (22) is opposite to that of the first protruding structure (12).

2. The battery box according to claim 1, characterized in that: The first protruding structure (12) further comprises a sub-protruding structure (123) protruding in a direction away from the wall body (31), and the sub-protruding structure (123) is arranged in alignment with the second protruding structure (22).

3. The battery box according to claim 2, characterized in that: The number of the sub-protrusion structure (123) is one or more; When the number of the sub-protruding structure (123) is one, the sub-protruding structure (123) is located at the center of the first protruding structure (12).

4. The battery box according to claim 1, characterized in that: The second protruding structure (22) comprises a first plane portion (222) and an inclined portion (221), wherein the first plane portion (222) is parallel to the wall body (31), and the inclined portion (221) is located on both sides of the first plane portion (222) and forms an obtuse angle with the first plane portion (222).

5. The battery box according to any one of claims 1 to 4, characterized in that: The first protruding structure (12) comprises a second planar portion (122) and a first vertical surface portion (121), wherein the second planar portion (122) is parallel to the wall (31), and the first vertical surface portion (121) is located on both sides of the second planar portion (122) and is perpendicular to the second planar portion (122).

6. The battery box according to claim 5, characterized in that: The inner lining plate (2) comprises a third plane portion (21) and a second vertical surface portion (23); one end of the third plane portion (21) is connected to the edge of the second protruding structure (22), and the other end is connected to the second vertical surface portion (23); the third plane portion (21) is attached to and fixedly connected with the second plane portion (122); the second vertical surface portion (23) is located on both sides of the third plane portion (21) and is perpendicular to the third plane portion (21); the second vertical surface portion (23) is attached to and fixedly connected with the first vertical surface portion (121).

7. The battery box according to claim 6, characterized in that: The third plane portion (21) and the second plane portion (122), as well as the second vertical surface portion (23) and the first vertical surface portion (121) are welded and fixed.

8. The battery box according to claim 7, characterized in that: The third plane portion (21) and the second plane portion (122) are both provided with process holes (4), and the process holes (4) on the third plane portion (21) and the process holes (4) on the second plane portion (122) are arranged in alignment.

9. The battery box according to any one of claims 1 to 3, characterized in that: The outer beam plate (1) and the inner lining plate (2) are both sheet metal parts.

10. The battery box according to any one of claims 1 to 3, characterized in that: The outer beam plate (1) further comprises an edge portion (11), wherein the edge portion (11) is located on both sides of the first protruding structure (12), and the edge portion (11) has a plurality of hollows (111).

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