Battery packs and vehicles

Abstract

This application provides a battery pack and a vehicle, relating to the field of vehicle technology, for improving the structural strength of the battery pack. The battery pack includes: an aluminum alloy beam, a magnesium alloy beam, an aluminum alloy bracket, and a first rivet. The aluminum alloy bracket includes a second connecting section, one end of which is connected to the aluminum alloy beam, and the other end extends away from the aluminum alloy beam and is connected to the magnesium alloy beam via the first rivet. Thus, by connecting the second connecting section of the aluminum alloy bracket to the aluminum alloy beam and to the magnesium alloy beam via the first rivet, the magnesium alloy beam can be connected to the aluminum alloy beam. The riveting method improves the connection strength between the aluminum alloy beam and the magnesium alloy beam, and also avoids corrosion problems caused by welding between the aluminum alloy beam and the magnesium alloy beam, thereby improving the structural strength of the battery pack.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a battery pack and a vehicle. Background Technology

[0002] The battery pack contains aluminum profile beams, which are connected to each other by welding. To reduce the weight of the battery pack, some aluminum profile beams are replaced with magnesium alloy beams. However, these aluminum profile beams cannot be welded to the magnesium alloy beams. Welding would lead to corrosion at the connection points, resulting in lower overall structural strength of the battery pack. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides a battery pack and a vehicle for improving the structural strength of the battery pack.

[0004] In a first aspect, embodiments of this application provide a battery pack, the battery pack comprising: an aluminum alloy beam, a magnesium alloy beam, an aluminum alloy bracket and a first rivet, the aluminum alloy bracket comprising a second connecting section, one end of the second connecting section being connected to the aluminum alloy beam, and the other end extending away from the aluminum alloy beam and being connected to the magnesium alloy beam by the first rivet.

[0005] According to the battery pack of this application embodiment, by setting an aluminum alloy bracket, the second connecting section of the aluminum alloy bracket is connected to the aluminum alloy beam, and connected to the magnesium alloy beam by a first rivet, so that the magnesium alloy beam can be connected to the aluminum alloy beam. Moreover, by riveting, the connection strength between the aluminum alloy beam and the magnesium alloy beam is better, and the corrosion problem caused by welding of the aluminum alloy beam and the magnesium alloy beam can also be avoided, thereby improving the structural strength of the battery pack.

[0006] In one possible implementation, the aluminum alloy bracket further includes a first connecting section, one side of which is fitted to the aluminum alloy beam, and the first connecting section is connected to a second connecting section.

[0007] In one possible implementation, the battery pack further includes a second rivet, through which the aluminum alloy beam is connected to the first connecting segment.

[0008] In one possible implementation, the first connecting segment is provided with a mounting groove located on the side of the first connecting segment away from the aluminum alloy beam, and the head of the second rivet is located within the mounting groove. And / or, the mounting groove is provided with a reinforcing rib, the two ends of which are respectively connected to the two inner walls opposite to the mounting groove, and the reinforcing rib is located on one side of the second rivet.

[0009] In one possible implementation, the first connecting segment is provided with a second adhesive layer for connecting to the end of the magnesium alloy beam.

[0010] In one possible implementation, the second connecting segment has a receiving space containing a plurality of reinforcing members that divide the receiving space into a plurality of energy-absorbing cavities.

[0011] In one possible implementation, the magnesium alloy beam has a receiving cavity with an opening, through which the second connecting segment passes.

[0012] In one possible implementation, the magnesium alloy beam has multiple strip holes, through which the first rivet passes.

[0013] In one possible implementation, the battery pack further includes a first adhesive layer, and the second connecting segment is connected to the magnesium alloy beam via the first adhesive layer and the first rivet.

[0014] Secondly, this application provides a vehicle, the vehicle including a body and the aforementioned battery pack, the battery pack being disposed on the vehicle body.

[0015] The technical effects of any design method in the second aspect can be found in the technical effects of different design methods in the first aspect, and will not be repeated here. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a partially exploded view of a battery pack provided in some embodiments of this application;

[0019] Figure 2 Partial schematic diagram of a battery pack provided for other embodiments of this application;

[0020] Figure 3 A partial cross-sectional view of a battery pack provided for some embodiments of this application.

[0021] Figure label:

[0022] 100. Battery pack;

[0023] 1. Aluminum alloy beams;

[0024] 2. Magnesium alloy beam; 21. Strip hole;

[0025] 3. Aluminum alloy bracket; 31. First connecting section; 311. Mounting groove; 312. Reinforcing rib; 32. Second connecting section; 321. Reinforcing component;

[0026] 4. First rivet;

[0027] 5. Second rivet;

[0028] 6. First adhesive layer;

[0029] 7. Second adhesive layer. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after the connection. Furthermore, the directional terms mentioned in the embodiments of this application, such as "inner" and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0033] In the description of embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0034] The battery pack contains aluminum profile beams, which are connected to each other by welding. To reduce the weight of the battery pack, some aluminum profile beams are replaced with magnesium alloy beams. However, these aluminum profile beams cannot be welded to the magnesium alloy beams. Welding would lead to corrosion at the connection points, resulting in lower overall structural strength of the battery pack.

[0035] To address the aforementioned technical problems, this application provides a battery pack and a vehicle.

[0036] The battery pack of the present application embodiment will be described below.

[0037] Please see Figures 1-3 , Figure 1 This is a partially exploded view of a battery pack provided in some embodiments of this application. Figure 2 This is a partial schematic diagram of a battery pack provided in other embodiments of this application. Figure 3 This is a partial cross-sectional view of a battery pack provided in some embodiments of this application. The battery pack 100 includes an aluminum alloy beam 1, a magnesium alloy beam 2, an aluminum alloy bracket 3, and a first rivet 4.

[0038] The aluminum alloy bracket 3 is connected to the aluminum alloy beam 1. The aluminum alloy bracket 3 can be connected to the aluminum alloy beam 1 by welding, riveting, or other methods.

[0039] The aluminum alloy bracket 3 may further include a second connecting section 32. One end of the second connecting section 32 is connected to the aluminum alloy beam 1, and the other end extends away from the aluminum alloy beam 1 and is connected to the magnesium alloy beam 2 by a first rivet 4. The number of first rivets 4 can be multiple, and the multiple first rivets 4 can be spaced apart in the circumferential direction of the magnesium alloy beam 2, thereby connecting the magnesium alloy beam 2 to the aluminum alloy bracket 3.

[0040] For example, the magnesium alloy beam 2 may be sleeved on the outer periphery of the second connecting section 32, or the second connecting section 32 may be sleeved on the outer periphery of the magnesium alloy beam 2, or the magnesium alloy beam 2 may be connected to one side surface of the second connecting section 32. This application does not limit this.

[0041] According to the battery pack 100 of this application embodiment, by setting an aluminum alloy bracket 3, the second connecting section 32 of the aluminum alloy bracket 3 is connected to the aluminum alloy beam 1, and connected to the magnesium alloy beam 2 by the first rivet 4. This allows the magnesium alloy beam 2 to be connected to the aluminum alloy beam 1. Moreover, by riveting, the connection strength between the aluminum alloy beam 1 and the magnesium alloy beam 2 is better, and corrosion problems caused by welding can also be avoided between the aluminum alloy beam 1 and the magnesium alloy beam 2, thereby improving the structural strength of the battery pack 100.

[0042] Please continue reading. Figures 1-3 In some embodiments, the battery pack 100 may further include a first adhesive layer 6, and the second connecting segment 32 is connected to the magnesium alloy beam 2 via the first adhesive layer 6 and a first rivet 4. Specifically, the first adhesive layer 6 may cover the surface of the second connecting segment 32. When connected to the magnesium alloy beam 2, the first adhesive layer 6 contacts the magnesium alloy beam 2, and the first adhesive layer 6 is located between the magnesium alloy beam 2 and the second connecting segment 32, allowing the second connecting segment 32 to be connected to the magnesium alloy beam 2 via the first adhesive layer 6. Thus, the first adhesive layer 6 can pre-fix the magnesium alloy beam 2, and then the magnesium alloy beam 2 can be further fixed by the first rivet 4, thereby improving the connection strength between the aluminum alloy beam 1 and the magnesium alloy beam 2.

[0043] It should be noted that the first adhesive layer 6 may cover the surface of each second connecting segment 32 opposite to the magnesium alloy beam 2, or it may only cover the part of the surface of the second connecting segment 32 opposite to the magnesium alloy beam 2. This application does not limit this.

[0044] Please continue reading. Figures 1-3 In some embodiments, the aluminum alloy bracket 3 may include a first connecting segment 31. One side of the first connecting segment 31 is in contact with the aluminum alloy beam 1. Specifically, the surface of one side of the first connecting segment 31 is in contact with the surface of the aluminum alloy beam 1. This increases the connection area between the aluminum alloy bracket 3 and the aluminum alloy beam 1, thereby improving the connection strength between them.

[0045] The second connecting segment 32 can extend from the first connecting segment 31 in a direction away from the aluminum alloy beam 1 and is connected to the magnesium alloy beam 2. Specifically, the first connecting segment 31 and the second connecting segment 32 can have an included angle. One end of the second connecting segment 32 is connected to the first connecting segment 31, and the other end is connected to the magnesium alloy beam 2 through the first adhesive layer 6 and the first rivet 4.

[0046] For example, the magnesium alloy beam 2 can be perpendicular to the aluminum alloy beam 1, and the first connecting segment 31 and the second connecting segment 32 can be formed into a "T" shape.

[0047] Please continue reading. Figures 1-3 In some embodiments, the battery pack 100 may also include a second rivet 5. The aluminum alloy beam 1 is connected to the first connecting segment 31 by the second rivet 5. This connection method is simple and helps to reduce the difficulty of connecting the aluminum alloy beam 1 and the aluminum alloy bracket 3.

[0048] Please continue reading. Figures 1-3 In some embodiments, a mounting groove 311 may be provided on the first connecting segment 31. The mounting groove 311 is located on the side of the first connecting segment 31 away from the aluminum alloy beam 1, and the head of the second rivet 5 is located within the mounting groove 311. Specifically, the mounting groove 311 is located on the side of the first connecting segment 31 facing the magnesium alloy beam 2 and is recessed towards the side closer to the aluminum alloy beam 1. The second rivet 5 is disposed within the mounting groove 311 for connecting the first connecting segment 31 and the aluminum alloy beam 1. Thus, the mounting groove 311 can protect the head of the second rivet 5, thereby improving the service life of the second rivet 5.

[0049] Please continue reading. Figure 2 For example, a reinforcing rib 312 may be provided within the mounting groove 311. The two ends of the reinforcing rib 312 may be connected to the two opposing inner walls of the mounting groove 311, and the reinforcing rib 312 is located on one side of the second rivet 5. Therefore, there may be a gap between the reinforcing rib 312 and the second rivet 5, thereby preventing the reinforcing rib 312 from affecting the assembly of the second rivet 5. Providing a reinforcing rib 312 helps to improve the structural strength and rigidity of the first connecting section 31.

[0050] The number of reinforcing ribs 312 can be multiple, and the number of second rivets 5 can also be multiple. The reinforcing ribs 312 can be located between two adjacent second rivets 5, so that multiple second rivets 5 can be separated by multiple reinforcing ribs 312, which helps to ensure the structural strength of the first connecting section 31.

[0051] like Figure 2 As shown, in this embodiment, there are four second rivets 5 and two reinforcing ribs 312, which are connected in a cross shape within the mounting groove 311.

[0052] Please continue reading. Figures 1-3In some embodiments, a second adhesive layer 7 is provided on the first connecting segment 31. The second adhesive layer 7 is used for connection to the end of the magnesium alloy beam 2. Specifically, the second adhesive layer 7 can cover the end of the magnesium alloy beam 2 facing the first connecting segment 31. Thus, the end of the magnesium alloy beam 2 can be fixed by the second adhesive layer 7, so that the magnesium alloy beam 2 can be connected to the first connecting segment 31 and the aluminum alloy beam 1 through the second adhesive layer 7, thereby improving the fixing effect of the magnesium alloy beam 2.

[0053] For example, if the mounting groove 311 can extend to the second connecting section 32, then a portion of the second adhesive layer 7 can be located within the mounting groove 311. This allows for better fixation of the magnesium alloy beam 2.

[0054] Please continue reading. Figures 1-3 In some embodiments, the first connecting segment 31 and the second connecting segment 32 are integrally formed. This is beneficial for improving the connection strength between the first connecting segment 31 and the second connecting segment 32, and also for improving the assembly efficiency of the battery pack 100.

[0055] For example, the first connecting segment 31 and the second connecting segment 32 can be formed by die casting.

[0056] Please continue reading. Figures 1-3 In some embodiments, the second connecting segment 32 has a receiving space. A plurality of reinforcing members 321 are provided within the receiving space. The plurality of reinforcing members 321 divide the receiving space into a plurality of energy-absorbing cavities. Thus, the structural strength of the second connecting segment 32 can be improved by the plurality of reinforcing members 321, thereby providing better stable support and reducing the weight of the second connecting segment 32.

[0057] Please continue reading. Figures 1-3 In some embodiments, the magnesium alloy beam 2 has a receiving cavity with an opening, and the second connecting section 32 passes through the opening. Thus, a portion of the magnesium alloy beam 2 can be fitted around the outer periphery of the second connecting section 32, facilitating the fixation of the magnesium alloy beam 2 and thereby improving the assembly efficiency of the battery pack 100.

[0058] For example, the shape of the second connecting segment 32 is the same as the shape of the receiving cavity of the magnesium alloy beam 2, for example, both can be rectangular.

[0059] Please continue reading. Figures 1-3 In some embodiments, the magnesium alloy beam 2 is provided with multiple strip holes 21, through which the first rivet 4 passes. This allows the installation position of the magnesium alloy beam 2 to be adjusted via the strip holes 21, thereby reducing the assembly difficulty of the magnesium alloy beam 2.

[0060] Please continue reading. Figures 1-3In some embodiments, the first rivet 4 is made of carbon steel, and its surface is plated with a zinc-nickel alloy. This improves the structural strength of the first rivet 4, thereby enhancing the connection strength between the aluminum alloy bracket 3 and the magnesium alloy beam 2.

[0061] The vehicle described in this application embodiment will now be explained.

[0062] The vehicle in this embodiment includes a body and a battery pack 100, the battery pack 100 being disposed on the body. Since the battery pack 100 uses magnesium alloy beams 2, it is beneficial to reduce the weight and structural strength of the battery pack 100, thereby contributing to the lightweighting of the vehicle.

[0063] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0064] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A battery pack (100), characterized by, The battery pack (100) includes: Aluminum alloy beam (1); Magnesium alloy beam (2); An aluminum alloy bracket (3) includes a second connecting section (32), one end of which is connected to the aluminum alloy beam (1), and the other end extends away from the aluminum alloy beam (1) and is connected to the magnesium alloy beam (2) by a first rivet (4).

2. The battery pack (100) according to claim 1, characterized in that, The aluminum alloy bracket (3) further includes a first connecting section (31), one side of which is attached to the aluminum alloy beam (1), and the first connecting section (31) is connected to the second connecting section (32).

3. The battery pack (100) according to claim 2, characterized in that, The battery pack (100) also includes a second rivet (5), and the aluminum alloy beam (1) is connected to the first connecting section (31) by the second rivet (5).

4. The battery pack (100) according to claim 3, characterized in that, The first connecting segment (31) is provided with a mounting groove (311), the mounting groove (311) is located on the side of the first connecting segment (31) away from the aluminum alloy beam (1), and the head of the second rivet (5) is located in the mounting groove (311); And / or, the mounting groove (311) is provided with a reinforcing rib (312), the two ends of the reinforcing rib (312) are respectively connected to the two inner walls opposite to the mounting groove (311), and the reinforcing rib (312) is located on one side of the second rivet (5).

5. The battery pack (100) according to claim 4, characterized in that, The first connecting section (31) is provided with a second adhesive layer (7), which is used to connect to the end of the magnesium alloy beam (2).

6. The battery pack (100) according to claim 1, characterized in that, The second connecting section (32) has a receiving space, in which a plurality of reinforcing members (321) are provided, and the plurality of reinforcing members (321) divide the receiving space into a plurality of energy-absorbing cavities.

7. The battery pack (100) according to claim 1, characterized in that, The magnesium alloy beam (2) has a receiving cavity with an opening, and the second connecting section (32) passes through the opening.

8. The battery pack (100) according to claim 1, characterized in that, The magnesium alloy beam (2) is provided with multiple strip holes (21), and the first rivet (4) passes through the strip holes (21).

9. The battery pack (100) according to claim 1, characterized in that, The battery pack (100) further includes a first adhesive layer (6), and the second connecting segment (32) is connected to the magnesium alloy beam (2) through the first adhesive layer (6) and the first rivet (4).

10. A vehicle, characterized in that, The vehicle includes a vehicle body and a battery pack (100) according to any one of claims 1-9, the battery pack (100) being disposed on the vehicle body.

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