Battery pack box body, battery pack and electric automobile

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery pack box body, a battery pack and an electric automobile. A frame in the battery pack box comprises a bottom protective plate and a plurality of frames, the frames are sequentially connected end to end to surround the peripheral side of the bottom protective plate, a first connecting cavity is formed in each frame, the outer wall of each first connecting cavity is connected with the bottom protective plate in a riveting mode, and the two ends of each first connecting cavity are open so that the first connecting cavities can be communicated with the outside. According to the battery pack box body, the battery pack and the electric vehicle, part of the riveting piece is prevented from being left in the frame, so that abnormal sound caused by collision between the riveting piece and the frame is avoided, and the use experience feeling of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack box, a battery pack and an electric vehicle. Background Art

[0002] The battery pack box serves as a structure for accommodating battery cells, which includes a bottom guard plate and a frame. When the bottom guard plate and the frame are fixed by riveting, if the bottom guard plate needs to be removed from the frame for maintenance, the part of the riveted part exposed to the outside needs to be knocked off, while the other part of the riveted part remains in the frame and cannot be taken out. When the battery pack changes position during use, for example, when the battery pack installed in an electric vehicle is started with the electric vehicle, some of the riveted parts remaining in the frame will make abnormal noises, causing a poor user experience.

[0003] Therefore, there is an urgent need to design a battery pack case, a battery pack and an electric vehicle to solve the above problems. Utility Model Content

[0004] One object of the utility model is to provide a battery pack box, which can prevent the riveted parts from remaining in the frame, thereby avoiding the riveted parts from colliding with the frame and causing abnormal noise.

[0005] Another object of the present invention is to provide a battery pack that does not make abnormal noise when moving, thereby providing a better user experience.

[0006] Another object of the utility model is to provide an electric vehicle, in which a battery pack does not make abnormal noises during operation, thereby improving the driving experience of the user.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] Battery pack box, including:

[0009] Bottom guard plate;

[0010] The frame includes a plurality of frames, which are connected end to end in sequence to enclose the circumference of the bottom guard plate. A first connecting cavity is provided in each of the frames. The outer wall of each of the first connecting cavities is connected to the bottom guard plate by riveting. Both ends of each of the first connecting cavities are opened to connect the first connecting cavity with the outside.

[0011] As an optional solution, the outer wall of the first connecting cavity is connected to the bottom guard plate via a first rivet, and the first rivet is a blind rivet.

[0012] As an optional solution, the frame is overall rectangular, each of the frame extends along its length direction, the first connecting cavity penetrates the frame along the length direction of its corresponding frame, and the opening is arranged at opposite ends of the first connecting cavity along the length direction.

[0013] As an optional solution, the frame includes a main body, and the main body has a plurality of cavities in a vertical direction, and one of the cavities close to the bottom guard plate is the first connecting cavity.

[0014] As an optional solution, the battery pack box further includes a liquid cooling plate, which is located on a side of the bottom guard plate facing the inside of the frame, and the frame includes:

[0015] A main body, wherein the first connecting cavity is provided in the main body;

[0016] The connecting part is connected to the inner side of the main body, and a plurality of the connecting parts are connected end to end and surrounded by the peripheral side of the liquid cooling plate, and the connecting parts are connected to the liquid cooling plate.

[0017] As an optional solution, the above-mentioned connecting part is connected to the above-mentioned liquid cooling plate through a second rivet, the above-mentioned connecting part opens a second connecting cavity, the outer wall of the above-mentioned second connecting cavity is connected to the above-mentioned bottom guard plate, and the above-mentioned second connecting cavity is used to accommodate part of the above-mentioned second rivet.

[0018] As an optional solution, the second rivet member is a blind hole rivet.

[0019] As an optional solution, the space between the second rivet and the connecting portion is filled with glue; and / or

[0020] The space between the second rivet and the liquid cooling plate is filled with colloid; and / or

[0021] The space between the liquid cooling plate and the connecting portion is filled with colloid.

[0022] As an optional solution, the bottom surface of the connecting portion is higher than the bottom surface of the main body, the second rivet located on the side of the liquid cooling plate away from the connecting portion is higher than the bottom surface of the main body, and the liquid cooling plate is connected to the bottom wall of the connecting portion.

[0023] As an optional solution, the frame is a profile.

[0024] Battery pack, including:

[0025] A number of battery cells;

[0026] The battery pack box mentioned above contains a plurality of battery cells.

[0027] An electric vehicle comprises a vehicle body and the above-mentioned battery pack, wherein the above-mentioned battery pack is installed on the above-mentioned vehicle body.

[0028] The beneficial effects of the utility model are:

[0029] The utility model provides a battery pack box, which is formed by opening a first connecting cavity in a frame, and after the outer wall of the first connecting cavity is riveted to the bottom guard plate, the big end of the rivet is abutted against the lower side of the bottom plate, and the other end of the rivet is extended into the first connecting cavity and rivets the bottom plate and the outer wall of the first connecting cavity. When the bottom plate needs to be removed, the big end of the rivet is knocked off, and the other end can be pushed out or blown out through the openings at both ends of the first connecting cavity, thereby avoiding that part of the rivet remains in the frame, thereby avoiding the collision between the rivet and the frame and causing abnormal noise, thereby improving the user experience.

[0030] The utility model also provides a battery pack, which includes a plurality of battery cells and the battery pack box, wherein the plurality of battery cells are accommodated in the battery pack box. By adopting the battery pack box, the battery pack will not make abnormal noise when moving, and the user's use experience is better.

[0031] This embodiment also provides an electric vehicle, comprising a vehicle body and the above-mentioned battery pack, wherein the battery pack is installed on the vehicle body. By adopting the above-mentioned battery pack, the above-mentioned electric vehicle will not produce abnormal noise during operation, thereby improving the driving experience of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a battery pack box provided by an embodiment of the utility model;

[0033] Figure 2 This is a schematic diagram of the structure of the battery pack box provided by the embodiment of the utility model with one frame hidden;

[0034] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0035] Figure 4 This is an exploded view of the battery pack box provided by an embodiment of the utility model with the frame hidden.

[0036] In the figure:

[0037] 10. Bottom guard plate;

[0038] 20, frame; 21, frame; 211, main body; 2111, cavity; 2112, first connecting cavity; 212, connecting portion; 2121, second connecting cavity;

[0039] 30. First riveted part; 40. Second riveted part; 50. Sealing layer; 60. Liquid cooling plate; 70. Silicone foam. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] The battery pack case includes a bottom guard plate and a frame. The frame is arranged around the bottom guard plate to form an accommodation space for accommodating battery cells in the middle of the battery pack case. In the prior art, the bottom guard plate and the frame are connected by riveting. When the bottom guard plate needs to be removed for inspection, the bottom guard plate can only be removed by knocking off the exposed end of the rivet, while some rivets located in the frame remain in the frame and cannot be removed. During the use of the battery pack, the remaining rivets collide with the inner wall of the frame, which is likely to produce abnormal noise, reducing the user experience.

[0045] In order to solve the above problems, this embodiment provides a battery pack box, such as Figure 1-Figure 3 As shown, the frame 20 in the battery pack box includes a plurality of frames 21, which are connected end to end in sequence to enclose the periphery of the bottom guard plate 10, and a first connecting cavity 2112 is opened in each frame 21. The outer wall of each first connecting cavity 2112 is connected to the bottom guard plate 10 by riveting, and both ends of each first connecting cavity 2112 are opened to connect the first connecting cavity 2112 with the outside.

[0046] The above-mentioned battery pack case is formed by opening a first connecting cavity 2112 in the frame 21. After the outer wall of the first connecting cavity 2112 is riveted to the bottom guard plate 10, the big end of the rivet is abutted against the lower side of the bottom guard plate 10, and the other end of the rivet extends into the first connecting cavity 2112 and rivets the bottom guard plate 10 and the outer wall of the first connecting cavity 2112. When the bottom guard plate 10 needs to be removed, the big end of the rivet is knocked off, and the other end can be pushed out or blown out through the openings at both ends of the first connecting cavity 2112, thereby avoiding part of the rivet remaining in the frame 20, thereby avoiding the collision between the rivet and the frame 20 and the generation of abnormal noise, thereby improving the user experience.

[0047] Optionally, the outer wall of the first connection cavity 2112 is formed by the top wall, the left side wall, the bottom wall and the right side wall. In this embodiment, the bottom guard plate 10 is connected to the bottom wall for convenient installation. In other embodiments, the bottom plate can also be connected to the top wall, the left side wall or the right side wall, which is not limited here.

[0048] In this embodiment, Figure 1 As shown, the frame 20 is arranged in a rectangular shape as a whole, each frame 21 extends along its length direction, and the first connection cavity 2112 passes through the frame 21 along the length direction of its corresponding frame 21, and the opening is arranged at two opposite ends of the first connection cavity 2112 along its length direction. In other embodiments, the frame 20 as a whole can also be adjusted according to the shape of the battery pack, for example, it can also be a trapezoid, pentagon, hexagon, circle, etc., which is not limited here.

[0049] Optionally, the outer wall of the first connection cavity 2112 is connected to the bottom guard plate 10 through a first rivet 30, and the first rivet 30 is a blind rivet. Blind rivets have the advantages of simple operation, high efficiency, small impact force on the connecting member, and uniform external force applied to the connecting member. In other embodiments, the first rivet 30 can also be a pull rivet, which is not limited here.

[0050] In an optional embodiment, if Figure 3As shown, the frame 21 includes a main body 211, and the main body 211 is provided with a plurality of cavities 2111 at intervals in the vertical direction, and a cavity 2111 close to the bottom guard plate 10 is a first connecting cavity 2112. Through the above arrangement, it is ensured that the frame 21 has a certain height in the vertical direction, and the lightweight requirement of the frame 21 can be met.

[0051] In an optional embodiment, if Figure 2 and Figure 3 As shown, the battery pack box also includes a liquid cooling plate 60, which is located on the side of the bottom guard plate 10 facing the inside of the frame 20, and the frame 21 also includes a connecting portion 212, which is connected to the inner side of the main body 211. A plurality of connecting portions 212 are connected end to end and enclose the peripheral side of the liquid cooling plate 60, and the connecting portion 212 is connected to the liquid cooling plate 60. Through the above arrangement, the bottom guard plate 10 is connected to the main body 211, the liquid cooling plate 60 is connected to the connecting portion 212, and the liquid cooling plate 60 and the bottom guard plate 10 are each independently connected to the frame 21, thereby avoiding the situation in the prior art that the bottom guard plate 10 and the liquid cooling plate 60 are connected to the frame 21 by a connecting piece after being stacked, causing the bottom guard plate 10 to be collided, causing the liquid cooling plate 60 to be collided, and then causing the sealing failure of the liquid cooling plate 60.

[0052] Alternatively, if Figure 3 As shown, the connection part 212 is connected to the liquid cooling plate 60 through the second rivet 40, and the connection part 212 is provided with a second connection cavity 2121, and the outer wall of the second connection cavity 2121 is connected to the liquid cooling plate 60, and the second connection cavity 2121 is used to accommodate part of the second rivet 40. On the one hand, the opening of the second connection cavity 2121 makes the connection part 212 in the form of a frame 20 as a whole, and the structural strength is higher; on the other hand, the second connection cavity 2121 can play a certain protective role for the second rivet 40. Preferably, the second rivet 40 is a blind hole rivet. It can prevent the water vapor in the second connection cavity 2121 from gathering at the second rivet 40 and flowing into the position where the second rivet 40 contacts the liquid cooling plate 60 during use. After long-term use, the accumulated water vapor causes the sealing failure of the liquid cooling plate 60.

[0053] Optionally, the space between the second rivet 40 and the connection portion 212 is filled with colloid, the space between the second rivet 40 and the liquid cooling plate 60 is filled with colloid, and the space between the liquid cooling plate 60 and the connection portion 212 is filled with colloid. Through the above arrangement, the excellent air tightness of the liquid cooling plate 60 can be further ensured. Specifically, as Figure 3 and Figure 4 As shown, the colloid filled between the liquid cooling plate 60 and the connecting portion 212 forms a sealing layer 50 .

[0054] Alternatively, if Figure 3As shown, the bottom surface of the connecting portion 212 is higher than the bottom surface of the main body 211, and the part of the second rivet 40 located on the side of the liquid cooling plate 60 away from the connecting portion 212 is higher than the bottom surface of the main body 211, and the liquid cooling plate 60 is connected to the bottom wall of the connecting portion 212. Through the above arrangement, it is ensured that there is a sufficient height difference between the liquid cooling plate 60 and the bottom guard plate 10, so that after the bottom guard plate 10 is hit, the impact can be avoided to the greatest extent to transmit to the liquid cooling plate 60, further ensuring the stability of the liquid cooling plate 60 during use, and then ensuring that the airtightness of the liquid cooling plate 60 is not damaged. Among them, the part of the second rivet 40 located on the side of the liquid cooling plate 60 away from the connecting portion 212 refers to the big head end of the rivet.

[0055] In other embodiments, the liquid cooling plate 60 may also be connected to other outer walls of the second connecting cavity 2121 except the bottom wall, which is not limited here.

[0056] Optionally, the end faces of two adjacent frames 21 form an angle of 45° with the outer side face of the corresponding frame 21, and the connection position of the two adjacent frames 21 is also filled with glue. Figure 3 As shown, in the main body 211, the end faces of the plurality of cavities 2111 above the first connection cavity 2112 and the end face of the connection portion 212 share a first plane, and the colloid is filled on the first plane. The end face of the first connection cavity 2112 is locked back for a distance so that a gap is formed at the location between the two adjacent frames 21. After the bottom guard plate 10 is removed, air can be blown into the first connection cavity 2112 from the gap, so that part of the first rivet 30 remaining in the first connection cavity 2112 is blown out from the other opening of the first connection cavity 2112.

[0057] Optionally, the frame 21 is a profile, which makes molding more convenient.

[0058] Alternatively, if Figure 4 As shown, a silicone foam 70 is arranged between the liquid cooling plate 60 and the bottom guard plate 10, which can not only play a buffering role, but also prevent water vapor from entering between the liquid cooling plate 60 and the bottom guard plate 10, thereby ensuring sealing.

[0059] This embodiment also provides a battery pack, which includes a plurality of battery cells and the battery pack box, wherein the plurality of battery cells are accommodated in the battery pack box. By adopting the battery pack box, the battery pack will not make abnormal noise when moving, and the user's use experience is better.

[0060] This embodiment also provides an electric vehicle, comprising a vehicle body and the above-mentioned battery pack, wherein the battery pack is installed on the vehicle body. By adopting the above-mentioned battery pack, the above-mentioned electric vehicle will not produce abnormal noise during operation, thereby improving the driving experience of the user.

[0061] In other embodiments, the battery pack may also be used in ships or other electrical devices, which is not limited here.

[0062] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Battery pack box, It is characterized in that include: Bottom guard plate (10); The frame (20) comprises a plurality of frame frames (21), wherein the plurality of frame frames (21) are connected end to end in sequence to enclose the circumference of the bottom guard plate (10), a first connecting cavity (2112) is provided in each of the frame frames (21), an outer wall of each of the first connecting cavities (2112) is connected to the bottom guard plate (10) by riveting, and both ends of each of the first connecting cavities (2112) are open so that the first connecting cavity (2112) is connected to the outside.

2. The battery pack case according to claim 1, It is characterized in that The outer wall of the first connection cavity (2112) is connected to the bottom guard plate (10) via a first rivet (30), and the first rivet (30) is a blind rivet.

3. The battery pack case according to claim 1, It is characterized in that The frame (20) is arranged in a rectangular shape as a whole, and each of the frames (21) extends along its length direction. The first connecting cavity (2112) penetrates the frame (21) along the length direction of its corresponding frame (21), and the opening is arranged at two opposite ends of the first connecting cavity (2112) along the length direction.

4. The battery pack case according to claim 3, It is characterized in that The frame (21) comprises a main body (211), the main body (211) being provided with a plurality of cavities (2111) in a vertical direction, and one of the cavities (2111) close to the bottom guard plate (10) is the first connecting cavity (2112).

5. The battery pack case according to any one of claims 1 to 4, It is characterized in that The battery pack box further comprises a liquid cooling plate (60), wherein the liquid cooling plate (60) is located on a side of the bottom guard plate (10) facing the inside of the frame (20), and the frame (21) comprises: A main body (211), wherein the first connecting cavity (2112) is opened in the main body (211); A connecting portion (212) is connected to the inner side of the main body (211); a plurality of connecting portions (212) are connected end to end and surround the peripheral side of the liquid cooling plate (60); and the connecting portion (212) is connected to the liquid cooling plate (60).

6. The battery pack case according to claim 5, It is characterized in that The connecting portion (212) is connected to the liquid cooling plate (60) via a second rivet (40); the connecting portion (212) defines a second connecting cavity (2121); an outer wall of the second connecting cavity (2121) is connected to the liquid cooling plate (60); and the second connecting cavity (2121) is used to accommodate part of the second rivet (40).

7. The battery pack case according to claim 6, It is characterized in that The second rivet (40) is a blind hole rivet.

8. The battery pack case according to claim 6, It is characterized in that The space between the second rivet (40) and the connecting portion (212) is filled with glue; and / or The space between the second riveted component (40) and the liquid cooling plate (60) is filled with colloid; and / or The space between the liquid cooling plate (60) and the connecting portion (212) is filled with colloid.

9. The battery pack case according to claim 6, It is characterized in that The bottom surface of the connecting portion (212) is higher than the bottom surface of the main body (211), a portion of the second rivet (40) located on a side of the liquid cooling plate (60) away from the connecting portion (212) is higher than the bottom surface of the main body (211), and the liquid cooling plate (60) is connected to the bottom wall of the connecting portion (212).

10. The battery pack case according to any one of claims 1 to 4, It is characterized in that The frame (21) is a profile.

11. Battery pack, It is characterized in that include: A number of battery cells; According to the battery pack case as described in any one of claims 1-10, a plurality of battery cells are accommodated in the battery pack case.

12. Electric vehicles, It is characterized in that The invention comprises a vehicle body and the battery pack according to claim 11, wherein the battery pack is mounted on the vehicle body.

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