Edge beam, tray, battery pack and electric device

Abstract

The utility model discloses a boundary beam, tray, battery pack and electric device, boundary beam includes: boundary beam body, first reinforcement piece and second reinforcement piece, boundary beam body defines the cavity, cavity includes first side wall, second side wall and third side wall, the one end of first reinforcement piece is connected with first side wall, the other end of first reinforcement piece is connected with third side wall; the two ends of the second reinforcing piece are connected with the two ends of the second side wall respectively. Therefore, the boundary beam is suitable for being used in the battery pack, the boundary beam body forms a basic frame of the boundary beam, the first reinforcing piece, the second reinforcing piece, the third reinforcing piece and other structures are formed in the boundary beam body, external acting force can be dispersed, and through connection of the first reinforcing piece, the second reinforcing piece and the third reinforcing piece, the transverse stability of the cavity structure is enhanced; when the battery pack is impacted, the boundary beams can improve the protection effect on the battery pack, and the torsional rigidity and the overall structural stability of the boundary beams under stress are enhanced, so that the overall safety and stability of the battery pack are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a side beam, a tray, a battery pack and an electric device. Background Art

[0002] In the prior art, the number of support points in the cavity of the side beam of the battery pack is small, the overall rigidity of the side beam is insufficient, and it cannot effectively resist the impact received, and the anti-deformation ability is poor, which is prone to safety hazards. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the first object of the utility model is to provide a side beam, which can enhance the protection effect on the battery pack and enhance the torsional stiffness and overall structural stability when the side beam is stressed.

[0004] The second object of the utility model is to provide a tray, which includes the side beam described in the above embodiment.

[0005] The third object of the utility model is to provide a battery pack, which includes the tray described in the above embodiment and at least one battery cell group.

[0006] The fourth object of the utility model is to provide an electric device, which includes the battery pack described in the above embodiment.

[0007] The side beam according to the first aspect embodiment of the utility model includes: a side beam body, a first reinforcing member, a second reinforcing member and a third reinforcing member. The side beam body defines a cavity, and the cavity includes a first side wall, a second side wall and a third side wall. The first side wall and the second side wall are opposite to each other, and the third side wall is arranged between the first side wall and the second side wall. One end of the first reinforcing member is connected to the first side wall, and the other end of the first reinforcing member is respectively connected to the first side wall and the third side wall. Both ends of the second reinforcing member are respectively connected to both ends of the second side wall. The first reinforcing member and the second reinforcing member are arranged at intervals. The third reinforcing member is arranged between the first reinforcing member and the second reinforcing member, and the third reinforcing member is respectively connected to the first reinforcing member and the second reinforcing member.

[0008] According to the side beam of the embodiment of the present utility model, the side beam is applicable to a battery pack. The side beam body forms the basic framework of the side beam. Structures such as a first reinforcing member, a second reinforcing member, and a third reinforcing member are formed inside the side beam body, which helps to disperse external acting forces. The first side wall and the second side wall are connected to the first reinforcing member, the second reinforcing member, and the third reinforcing member, enhancing the lateral stability of the cavity structure. When the battery pack is impacted, the side beam can improve the protection of the battery pack, enhance the torsional stiffness and the overall structural stability when the side beam is stressed, thereby improving the overall safety and stability of the battery pack.

[0009] In some embodiments, the first reinforcing member includes: a first sub-member, a second sub-member, a third sub-member, and a fourth sub-member. One end of the first sub-member is connected to the first side wall; one end of the second sub-member is connected to the third side wall; both ends of the third sub-member are respectively connected to the other end of the first sub-member and the other end of the second sub-member; one end of the fourth sub-member is connected to the first side wall, and the other end of the fourth sub-member is connected to the connection between the second sub-member and the third sub-member.

[0010] In some embodiments, the other end of the first sub-member extends obliquely towards the second side wall along the first direction of the side beam; and / or the other end of the second sub-member extends obliquely towards the first sub-member.

[0011] In some embodiments, the included angle between the first sub-member and the first side wall is α1, and α1 satisfies: 30° ≤ α1 ≤ 60°; and / or, the included angle between the second sub-member and the third side wall is α2, and α2 satisfies: 30° ≤ α2 ≤ 60°.

[0012] In some embodiments, the fourth sub-member is arranged parallel to the third side wall.

[0013] In some embodiments, the second reinforcing member includes: a fifth sub-member and a sixth sub-member. One end of the fifth sub-member and one end of the sixth sub-member are connected to each other, and the other end of the fifth sub-member and the other end of the sixth sub-member are respectively connected to both ends of the second side wall.

[0014] In some embodiments, the included angle between the one end of the fifth sub-member and the one end of the sixth sub-member is β, and β satisfies: 90° ≤ β < 180°.

[0015] In some embodiments, a third reinforcing member is further included. One end of the third reinforcing member is connected to the one end of the fifth sub-member and the one end of the sixth sub-member, and the other end of the third reinforcing member is connected to the first reinforcing member.

[0016] In some embodiments, the third reinforcing member is arranged parallel to the third side wall.

[0017] In some embodiments, it further includes: a first anti-collision structure and a second anti-collision structure. The first anti-collision structure is disposed on a side of the first sidewall away from the second sidewall, and the first anti-collision structure is connected to one end of the first sidewall along a second direction of the side beam; the second anti-collision structure is disposed on the side of the first sidewall away from the second sidewall, and the second anti-collision structure is connected to the other end of the first sidewall along the second direction of the side beam. The first anti-collision structure and the second anti-collision structure are spaced apart along the second direction of the side beam.

[0018] In some embodiments, at least one chamber is provided in the first anti-collision structure and the second anti-collision structure.

[0019] In some embodiments, the first anti-collision structure includes: a fourth sidewall. A connection point of the fourth sidewall and the first sidewall and a connection point of the first sub-member and the first sidewall are located on two sides of the first sidewall along a first direction of the side beam and are opposite to each other along the first direction of the side beam.

[0020] In some embodiments, the second anti-collision structure includes: a fifth sidewall. A connection point of the fifth sidewall and the first sidewall and a connection point of the fourth sub-member and the first sidewall are located on two sides of the first sidewall along the first direction of the side beam and are opposite to each other along the first direction of the side beam.

[0021] In some embodiments, the first reinforcing member and the second reinforcing member divide the cavity into a first chamber, a second chamber, and a third chamber. The first reinforcing member and the first sidewall and the third sidewall define the first chamber, the second reinforcing member and the second sidewall define the second chamber, and the first reinforcing member, the second reinforcing member, and the third reinforcing member define the third chamber therebetween.

[0022] In some embodiments, the area of the first chamber is S1, the area of the second chamber is S2, and the area of the third chamber is S3. The S1, S2, and S3 satisfy: S1 < S2 < S3.

[0023] In some embodiments, an exhaust passage is formed in the second sidewall. A side of the exhaust passage facing the first sidewall is formed as an arc surface, and the arc surface protrudes toward the first sidewall along the first direction of the side beam.

[0024] In some embodiments, it further includes: a plugging member. The plugging member is disposed in the exhaust passage, and the plugging member divides the exhaust passage into two non-communicating sub-channels.

[0025] The tray according to the second aspect embodiment of the present utility model includes a side beam according to the first aspect embodiment of the present utility model described above.

[0026] The battery pack according to the third aspect embodiment of the present utility model includes: a tray and at least one battery cell group. The tray is the tray according to the second aspect embodiment of the present utility model described above; the battery cell group is disposed within the tray, and the dimension of the battery cell group along the second direction of the side beam of the tray is less than or equal to the height of the side beam.

[0027] The electrical device according to the fourth aspect embodiment of the present utility model includes the battery pack according to the third aspect embodiment of the present utility model described above.

[0028] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0029] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0030] Figure 1 is a schematic diagram of a side beam according to an embodiment of the present utility model;

[0031] Figure 2 is a cross-sectional schematic diagram of a side beam according to an embodiment of the present utility model;

[0032] Figure 3 is a schematic diagram of an exhaust passage according to an embodiment of the present utility model.

[0033] Reference Numerals:

[0034] 100, side beam;

[0035] 10, side beam body; 11, cavity; 12, first side wall; 13, second side wall; 14, third side wall; 15, first chamber; 16, second chamber; 17, third chamber;

[0036] 20, first reinforcing member; 21, first sub-member; 22, second sub-member; 23, third sub-member; 24, fourth sub-member;

[0037] 30, second reinforcing member; 31, fifth sub-member; 32, sixth sub-member; 33, third reinforcing member;

[0038] 40, first anti-collision structure; 41, fourth side wall; 42, second anti-collision structure; 43, fifth side wall;

[0039] 50, exhaust passage; 51, plugging member;

[0040] A. The first direction; B. The second direction. Detailed implementation mode

[0041] The embodiments of the present utility model will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Below, reference is made to Figures 1-3 Describe the side beam 100 according to the embodiments of the present utility model, including: a side beam body 10, a first reinforcing member 20, a second reinforcing member 30, and a third reinforcing member 33. The side beam 100 has a first direction A and a second direction B. The first direction A of the side beam is the width direction, and the second direction B of the side beam is the height direction.

[0042] Specifically, as Figures 1-3 shown, the side beam body 10 defines a cavity 11. The cavity 11 includes a first side wall 12, a second side wall 13, and a third side wall 14. The first side wall 12 and the second side wall 13 are opposite to each other, and the third side wall 14 is disposed between the first side wall 12 and the second side wall 13; one end of the first reinforcing member 20 is connected to the first side wall 12, and the other end of the first reinforcing member 20 is respectively connected to the first side wall 12 and the third side wall 14; both ends of the second reinforcing member 30 are respectively connected to both ends of the second side wall 13. The first reinforcing member 20 and the second reinforcing member 30 are spaced apart. The third reinforcing member 33 is disposed between the first reinforcing member 20 and the second reinforcing member 30, and the third reinforcing member 33 is respectively connected to the first reinforcing member 20 and the second reinforcing member 30.

[0043] Combined with Figures 1-3 , the first side wall 12 and the second side wall 13 extend along the second direction B of the side beam 100, the third reinforcing member 33 extends along the first direction A of the side beam 100, the first side wall 12 and the second side wall 13 are spaced apart along the first direction A of the side beam 100, the third side wall 14 extends along the first direction A of the side beam 100, and both ends of the third side wall 14 along the first direction A are respectively connected to one end of the first side wall 12 and the second side wall 13 located on the same side along the second direction B. One end of the first reinforcing member 20 along the second direction B away from the third side wall 14 is connected to the first side wall 12, and the other end of the first reinforcing member 20 along the second direction B is respectively connected to the first side wall 12 and the third side wall 14. One end of the second reinforcing member 30 along the second direction B of the side beam 100 is connected to one end of the second side wall 13 along the second direction B away from the third side wall 14, and the other end of the second reinforcing member 30 along the second direction B is connected to the other end of the second side wall 13 along the second direction B adjacent to the third side wall 14. The third reinforcing member 33 is respectively connected to the first reinforcing member 20 and the second reinforcing member 30, that is, the third reinforcing member 33 forms a connection bridge between the first reinforcing member 20 and the second reinforcing member 30. The setting of the third reinforcing member 33 enables the first reinforcing member 20, the second reinforcing member 30, and the third reinforcing member 33 to form a reinforcing network, which helps to establish a more stable force transmission path inside the side beam 100.

[0044] According to the side beam 100 of the embodiment of the present utility model, the side beam 100 is applicable to a battery pack. The side beam body 10 forms the basic framework of the side beam 100. Structures such as a first reinforcing member 20, a second reinforcing member 30, and a third reinforcing member 33 are formed inside the side beam body 10, which helps to disperse external acting forces. The first side wall 12 and the second side wall 13 enhance the lateral stability of the cavity 11 structure through their connections with the first reinforcing member 20, the second reinforcing member 30, and the third reinforcing member 33. When the battery pack is impacted, the side beam 100 can enhance the protection of the battery pack, increase the torsional stiffness when the side beam 100 is stressed, and the overall structural stability, thereby improving the overall safety and stability of the battery pack.

[0045] According to some embodiments of the present utility model, as Figures 1-3 shown, the first reinforcing member 20 includes: a first sub-member 21, a second sub-member 22, a third sub-member 23, and a fourth sub-member 24. One end of the first sub-member 21 is connected to the first side wall 12; one end of the second sub-member 22 is connected to the third side wall 14; both ends of the third sub-member 23 are respectively connected to the other end of the first sub-member 21 and the other end of the second sub-member 22. One end of the fourth sub-member 24 is connected to the first side wall 12, and the other end of the fourth sub-member 24 is connected to the connection point between the second sub-member 22 and the third sub-member 23. The third sub-member 23 extends along the second direction B of the side beam 100. One end of the first sub-member 21 is connected to the first side wall 12, and the other end of the first sub-member 21 is connected to the end of the third sub-member 23 that is away from the third side wall 14 along the second direction B of the side beam 100. The setting of the first sub-member 21 is used to strengthen the structural strength of the first side wall 12. When the first side wall 12 is subjected to an external force, the first sub-member 21 can more effectively disperse the acting force. One end of the second sub-member 22 is connected to the third side wall 14, and the other end of the second sub-member 22 is connected to the end of the third sub-member 23 that is adjacent to the third side wall 14 along the second direction B. The setting of the second sub-member 22 is used to strengthen the structural strength of the third side wall 14. The third sub-member 23 is adapted to connect the first sub-member 21 and the second sub-member 22 respectively to form a closed reinforcement loop, which can enhance the overall rigidity of the first reinforcing member 20, and can also optimize the force transmission route and reduce the stress concentration phenomenon. The fourth sub-member 24 extends along the first direction A of the side beam 100, and the fourth sub-member 24 is connected between the first reinforcing member 20 and the first side wall 12. The connection point between the fourth sub-member 24 and the second sub-member 22 and the third sub-member 23 can be regarded as a stress dispersion node, which helps to disperse the acting force to the entire first reinforcing member 20 and reduce the stress concentration at a single connection point.

[0046] Thus, through the mutual connection and reinforcement among the first sub-component 21, the third sub-component 23, and the second sub-component 22, the load-bearing capacity, the bending moment resistance performance, and the torsion resistance performance of the entire side beam 100 can be more comprehensively improved, ensuring the structural safety and stability of the battery pack in a complex dynamic environment. The arrangement of the fourth sub-component 24 can enhance the connection strength between the first reinforcement member 20 and the first side wall 12, making the structure of the first reinforcement member 20 more three-dimensional and stable, enabling the first reinforcement member 20 to effectively absorb and disperse external forces in multiple directions. Especially in a complex stress environment, it can significantly improve the ability of the battery pack to resist torsion, impact, and vibration, protecting the internal battery cells from damage.

[0047] According to some embodiments of the present invention, as Figure 2 shown, the other end of the first sub-component 21 extends obliquely along the first direction A of the side beam 100 towards the second side wall 13, that is, one end of the first sub-component 21 is connected to the first side wall 12, and the other end of the first sub-component 21 extends obliquely along the first direction A of the side beam 100 towards the side where the second side wall 13 is located, and the other end of the second sub-component 22 extends obliquely along the second direction B of the side beam 100 towards the side where the third side wall 14 is located.

[0048] Or, the other end of the second sub-component 22 extends obliquely towards the first sub-component 21, that is, one end of the second sub-component 22 is connected to the third side wall 14, the other end of the second sub-component 22 extends obliquely along the first direction A of the side beam 100 towards the side where the first side wall 12 is located, and the other end of the second sub-component 22 extends obliquely along the second direction B of the side beam 100 towards the direction away from the third side wall 14. In this embodiment, the other end of the second sub-component 22, that is, the end of the second sub-component 22 far from the third side wall 14, is connected to the connection part of the third sub-component 23 and the fourth sub-component 24 to better form a support for the third sub-component 23 and the fourth sub-component 24, improving the structural strength of the first side wall 12 and the load-bearing capacity of the side beam 100.

[0049] Thus, the first sub-component 21 and the second sub-component 22 are obliquely arranged, which can effectively enhance the stability of the side beam 100 in the second direction B. Especially when dealing with loads perpendicular to the third side wall 14, it can more effectively transfer and disperse these forces, reduce local stress concentration, and improve the durability and reliability of the structure.

[0050] According to some embodiments of the present invention, as Figure 2 shown, the included angle between the first sub-component 21 and the first side wall 12 is α1, and α1 satisfies: 30° ≤ α1 ≤ 60°; or the included angle between the second sub-component 22 and the third side wall 14 is α2, and α2 satisfies: 30° ≤ α2 ≤ 60°. Or the included angle between the first sub-component 21 and the first side wall 12 is α1, and the included angle between the second sub-component 22 and the third side wall 14 is α2.

[0051] If the angles between the first sub-component 21 and the first side wall 12, and between the second sub-component 22 and the third side wall 14 are less than 30°, the angles are too small, resulting in the first sub-component 21 or the second sub-component 22 being unable to effectively disperse the impact force received from the side beam 100, causing stress concentration at the connection, increasing the risk of fracture or deformation. If the angles between the first sub-component 21 and the first side wall 12, and between the second sub-component 22 and the third side wall 14 are greater than 60°, the angles are too large, which is not conducive to the assembly of the first sub-component 21 and the second sub-component 22 inside the cavity 11, affecting the compactness and integrity of the internal structure of the cavity 11 of the side beam 100. For example, α1 = 45° and α2 = 45°.

[0052] Therefore, by defining the angle ranges between the first sub-component 21 and the first side wall 12, and between the second sub-component 22 and the third side wall 14, the structural strength of the side beam 100 can be effectively enhanced, and the space utilization rate inside the cavity 11 of the side beam 100 can be improved.

[0053] According to some embodiments of the present utility model, as Figure 2 shown, the fourth sub-component 24 is arranged parallel to the third side wall 14.

[0054] By the parallel arrangement, the fourth sub-component 24 can form a stable support structure with the connection of the second sub-component 22 and the third sub-component 23. When the side beam 100 is subjected to a lateral force or a torsional force, the force can be effectively transmitted along the direction parallel to the third side wall 14, reducing the possibility of local deformation.

[0055] Therefore, the parallel arrangement of the fourth sub-component 24 and the third side wall 14 can enhance the structural integrity of the side beam 100, optimize the force transmission, improve the space efficiency, and simplify the production and assembly.

[0056] According to some embodiments of the present utility model, as Figure 2 shown, the second reinforcing member 30 includes: a fifth sub-component 31 and a sixth sub-component 32. One end of the fifth sub-component 31 and one end of the sixth sub-component 32 are connected to each other, and the other ends of the fifth sub-component 31 and the sixth sub-component 32 are respectively connected to both ends of the second side wall 13.

[0057] The other end of the fifth sub-member 31 is connected to one end of the second side wall 13 along the second direction B. One end of the fifth sub-member 31 extends obliquely towards the side where the first side wall 12 is located along the first direction A of the side beam 100 and extends obliquely towards the side where the third side wall 14 is located along the second direction B of the side beam 100. The other end of the sixth sub-member 32 is connected to the other end of the second side wall 13 connected to the third side wall 14 along the second direction B. One end of the sixth sub-member 32 extends obliquely towards the side where the first side wall 12 is located along the first direction A of the side beam 100 and extends obliquely towards the direction away from the third side wall 14 along the second direction B of the side beam 100. One end of the fifth sub-member 31 is connected to one end of the sixth sub-member 32, that is, the fifth sub-member 31 and the sixth sub-member 32 form a V-shaped structure.

[0058] Thus, the arrangement of the fifth sub-member 31 and the sixth sub-member 32 enables the second reinforcing member 30 to effectively support the second side wall 13, enhancing the structural strength of the second side wall 13 of the side beam 100. The layout of the fifth sub-member 31 and the sixth sub-member 32 ensures the symmetric transmission of force, enabling the external force applied to the side beam 100 to be quickly and evenly dispersed throughout the side beam 100 structure, effectively enhancing the lateral load capacity of the side beam 100 at the second side wall 13 and improving the overall structural crashworthiness of the second side wall 13.

[0059] According to some embodiments of the present invention, as Figure 2 shown, the included angle between one end of the fifth sub-member 31 and one end of the sixth sub-member 32 is β, and β satisfies: 90° ≤ β < 180°.

[0060] There is a tendency for stress concentration at the connection between the fifth sub-member 31 and the sixth sub-member 32. If the included angle between one end of the fifth sub-member 31 and one end of the sixth sub-member 32 is less than 90°, this acute angle is likely to cause stress concentration, easily resulting in local stress in the structure exceeding the load-bearing capacity of the material, thereby leading to deformation or cracking. If the included angle between one end of the fifth sub-member 31 and one end of the sixth sub-member 32 satisfies 90° ≤ β < 180°, the obtuse angle design can reduce stress concentration, evenly disperse the stress into the second reinforcing member 30, and improve the strength and durability of the second reinforcing member 30. Thus, by limiting the range of the included angle between one end of the fifth sub-member 31 and one end of the sixth sub-member 32, when the battery pack is subjected to cyclic loading, the obtuse angle design can reduce stress concentration during the cyclic loading process, reduce the risk of fatigue fracture of the side beam 100, and moreover, the obtuse angle design can also extend the service life of the side beam 100.

[0061] According to some embodiments of the present invention, as Figure 2 shown, it further includes a third reinforcing member 33. One end of the third reinforcing member 33 is connected to one end of the fifth sub-member 31 and one end of the sixth sub-member 32, and the other end of the third reinforcing member 33 is connected to the first reinforcing member 20.

[0062] The third reinforcing member 33 is connected to the connection between the fifth sub-member 31 and the sixth sub-member 32 at one end of the side beam 100 along the first direction A, and the other end of the third reinforcing member 33 along the first direction A of the side beam 100 is connected to the third sub-member 23 of the first reinforcing member 20.

[0063] Thus, the third reinforcing member 33 is formed as a connection bridge between the first reinforcing member 20 and the second reinforcing member 30. The arrangement of the third reinforcing member 33 enables the first reinforcing member 20, the second reinforcing member 30, and the third reinforcing member 33 to form a reinforcing network, which helps to establish a more stable force conduction path within the cavity 11 of the side beam 100, facilitates the dispersion and transmission of forces, ensures the balanced force and mutual support of the side beam 100 in all directions, and enhances the integrity and impact resistance of the entire side beam 100 structure.

[0064] According to some embodiments of the present invention, as Figure 2 shown, the third reinforcing member 33 is arranged parallel to the third side wall 14.

[0065] The third reinforcing member 33 is kept parallel to the third side wall 14. The third reinforcing member 33 can more effectively distribute the received forces (whether directly from the third side wall 14 or transmitted through other reinforcing members) evenly throughout the structure, which helps to reduce local stress concentration, improve the durability and reliability of the structure. The parallel arrangement between the third reinforcing member 33 and the third side wall 14 helps to improve the space utilization rate of the cavity 11 within the side beam 100 and simplifies the manufacturing and assembly processes. The third reinforcing member 33 parallel to the third side wall 14 can form an integral reinforcement framework with the first reinforcing member 20, the second reinforcing member 30, and each sub-member, increasing the overall rigidity of the structure and effectively enhancing the stability and load-bearing capacity of the side beam 100.

[0066] According to some embodiments of the present invention, as Figure 2 shown, it further includes: a first anti-collision structure 40 and a second anti-collision structure 42. The first anti-collision structure 40 is provided on the side of the first side wall 12 away from the second side wall 13, and the first anti-collision structure 40 is connected to one end of the first side wall 12 along the second direction B of the side beam 100; the second anti-collision structure 42 is provided on the side of the first side wall 12 away from the second side wall 13, and the second anti-collision structure 42 is connected to the other end of the first side wall 12 along the second direction B of the side beam 100. The first anti-collision structure 40 and the second anti-collision structure 42 are arranged at intervals along the second direction B of the side beam 100.

[0067] The first anti-collision structure 40 and the second anti-collision structure 42 are connected to the outer sidewall of the main body of the side beam 100. The functions of the first anti-collision structure 40 and the second anti-collision structure 42 are to first contact the impact force when a collision occurs, absorb energy through their own deformation, and reduce the direct impact on the main structure of the battery pack. The first anti-collision structure 40 and the second anti-collision structure 42 are arranged at intervals along the second direction B. To ensure that in the case where the collision force is not completely frontal, through the combined action of the first anti-collision structure 40 and the second anti-collision structure 42, the impact force can be more widely dispersed, enhancing the protection effect. The first anti-collision structure 40 and the second anti-collision structure 42 are arranged at intervals along the second direction B of the side beam 100, which can also increase the levels of impact energy absorption, avoid a single anti-collision point from bearing all the impact force, so as to more evenly disperse the action of the force and reduce the risk of local damage. The spaced arrangement can also adapt to different types of collisions. Whether it is an impact on the top, middle or bottom, the nearest support point can be found for energy absorption.

[0068] Thus, the spaced arrangement of the first anti-collision structure 40 and the second anti-collision structure 42, through reasonable layout and design, significantly enhances the protection ability of the side beam 100 in the face of various collision situations, providing a more reliable protection effect for the battery pack.

[0069] According to some embodiments of the present invention, as Figure 2 shown, at least one chamber is provided in the first anti-collision structure 40 and the second anti-collision structure 42.

[0070] The setting of the chamber structure enables the first anti-collision structure 40 and the second anti-collision structure 42 to deform to absorb energy when subjected to an impact force, thereby reducing the force transmitted to the battery pack itself and playing a buffering and protecting role. Compared with a solid structure, the design with chambers can reduce the total mass of the side beam 100 on the premise of ensuring the same energy absorption performance. Multiple chambers can be provided in the second anti-collision structure 42, and the multiple chambers are arranged at intervals along the first direction A of the side beam 100.

[0071] Thus, by providing at least one chamber inside the first anti-collision structure 40 and the second anti-collision structure 42, not only can the safety of the side beam 100 in a collision event be enhanced, but also the lightweight design of the side beam 100 can be realized. The connection between the first anti-collision structure 40, the second anti-collision structure 42 and the first sidewall 12 is the position where the side beam 100 bears the greatest force. The settings of the first anti-collision structure 40 and the second anti-collision structure 42 are used to enhance the structural strength of the side beam 100, so as to improve the impact resistance performance and reliability of the side beam 100, and enhance the protection effect of the side beam 100 on the battery pack.

[0072] According to some embodiments of the present invention, as Figure 2As shown, the first anti-collision structure 40 includes: a fourth side wall 41. The connection point of the fourth side wall 41 and the first side wall 12 and the connection point of the first sub-member 21 and the first side wall 12 are located on both sides of the first side wall 12 along the first direction A of the side beam 100 and are opposite to each other along the first direction A of the side beam 100.

[0073] The fourth side wall 41 extends along the first direction A of the side beam 100. One end of the fourth side wall 41 along the first direction A of the side beam 100 is connected to the first side wall 12, and the other end of the fourth side wall 41 extends along the first direction A of the side beam 100 in a direction away from the first side wall 12.

[0074] Thus, through the direct connection of the fourth side wall 41 of the first anti-collision structure 40 with the first side wall 12, the fourth side wall 41 can effectively transfer the external impact force into the main structure of the side beam 100, and utilize the entire side beam 100 to disperse and absorb these forces, reducing the direct impact on the battery pack. The fourth side wall 41 and the first sub-member 21 are opposite to each other in the first direction A of the side beam 100, forming a stable support frame, which is beneficial to improving the anti-collision effect of the side beam 100 and preventing local stress concentration.

[0075] According to some embodiments of the present invention, as Figure 2 shown, the second anti-collision structure 42 includes: a fifth side wall 43. The connection point of the fifth side wall 43 and the first side wall 12 and the connection point of the fourth sub-member 24 and the first side wall 12 are located on both sides of the first side wall 12 along the first direction A of the side beam 100 and are opposite to each other along the first direction A of the side beam 100.

[0076] The fifth side wall 43 extends along the first direction A of the side beam 100. One end of the fifth side wall 43 along the first direction A of the side beam 100 is connected to the first side wall 12, and the other end of the fifth side wall 43 extends along the first direction A of the side beam 100 in a direction away from the first side wall 12.

[0077] Thus, through the direct connection of the fifth side wall 43 of the second anti-collision structure 42 with the first side wall 12, the fifth side wall 43 can effectively transfer the external impact force into the main structure of the side beam 100, and utilize the entire side beam 100 to disperse and absorb these forces, reducing the direct impact on the battery pack. The fifth side wall 43 and the fourth sub-member 24 are opposite to each other in the first direction A of the side beam 100, forming a stable support frame, which is beneficial to improving the anti-collision effect of the side beam 100 and preventing local stress concentration.

[0078] According to some embodiments of the present invention, as Figure 2As shown, the first reinforcing member 20 and the second reinforcing member 30 divide the cavity 11 into a first chamber 15, a second chamber 16, and a third chamber 17. The first reinforcing member 20 and the first side wall 12 and the third side wall 14 define the first chamber 15. The second reinforcing member 30 and the second side wall 13 define the second chamber 16. The third chamber 17 is defined between the first reinforcing member 20, the second reinforcing member 30, and the third reinforcing member 33.

[0079] The first chamber 15 is disposed on one side of the cavity 11 adjacent to the first side wall 12 along the first direction A of the side beam 100. The second chamber 16 is disposed on one side of the cavity 11 adjacent to the second side wall 13 along the first direction A of the side beam 100. The third chamber 17 is disposed between the first reinforcing member 20 and the second reinforcing member 30. Among them, the fourth sub-member 24 of the first reinforcing member 20 divides the first chamber 15 into two sub-chambers, and the third reinforcing member 33 divides the third chamber 17 into two sub-chambers.

[0080] Thus, the settings of the first chamber 15, the second chamber 16, and the third chamber 17 can effectively improve the rigidity and stability of the overall structure of the side beam 100. The chamber structure defined by the first reinforcing member 20 and the second reinforcing member 30 can better distribute and absorb external forces when the side beam 100 is subjected to external forces, reduce structural deformation, and improve the ability of the side beam 100 to absorb collisions.

[0081] According to some embodiments of the present invention, as Figure 2 shown, the area of the first chamber 15 is S1, the area of the second chamber 16 is S2, and the area of the third chamber 17 is S3. S1, S2, and S3 satisfy: S1 < S2 < S3.

[0082] The third chamber 17 is disposed between the first chamber 15 and the second chamber 16. When the side beam 100 is impacted, the third chamber 17 receives a greater impact, so that the area of the third chamber 17 is the largest, which can ensure that the third chamber 17 has sufficient ability to absorb collisions. The second chamber 16 is disposed on one side of the cavity 11 adjacent to the second side wall 13 along the first direction A. The second chamber 16 is closest to the battery cell of the battery pack. The area of the second chamber 16 is relatively large to ensure the stability and high strength of the second chamber 16 and improve the protection of the battery cell in the battery pack.

[0083] Thus, by defining the relationship between the areas of the first chamber 15, the second chamber 16, and the third chamber 17, the layout inside the cavity 11 body can be optimized, so that the side beam body 10 has higher strength and the ability to resist and absorb collisions.

[0084] In this embodiment, the first chamber 15 includes two first sub-chambers. The fourth sub-component 24 divides the first chamber 15 into two first sub-chambers, and the two first sub-chambers are distributed along the second direction B. The third chamber 17 includes two third sub-chambers. The third reinforcing member 33 divides the third chamber 17 into two third sub-chambers, and the two third sub-chambers are distributed along the second direction B. The arrangement of multiple sub-chambers facilitates the collapse and energy absorption of the side beam when it is impacted, increases the buffering effect of the side beam 100, and slows down the intrusion into the battery pack.

[0085] According to some embodiments of the present invention, as Figure 2 and Figure 3 shown, an exhaust passage 50 is formed in the second side wall 13. One side of the exhaust passage 50 facing the first side wall 12 is formed as an arc surface, and the arc surface protrudes towards the first side wall 12 along the first direction A of the side beam 100.

[0086] The exhaust passage 50 is used for the gas to be quickly discharged through the exhaust passage 50 when the battery pack has a thermal runaway, so as to achieve pressure relief. One side of the exhaust passage 50 is formed as an arc surface structure. The arc surface design helps the gas to flow smoothly, reduces resistance, and improves the discharge efficiency. The arc surface has excellent buffering ability. The arc surface is the main stress-bearing surface of the exhaust passage 50 and can withstand a large impact. When the thermal runaway gas is discharged, it has a strong impact force. The exhaust passage 50 with the arc surface design can disperse the load to the greatest extent and reduce stress concentration, thereby improving the reliability of the exhaust passage 50.

[0087] Therefore, the arc surface design of the exhaust passage 50 can effectively improve the reliability of the exhaust passage 50, extend the service life of the exhaust passage 50, and the arrangement of the exhaust passage 50 can effectively improve the safety of the battery pack.

[0088] According to some embodiments of the present invention, as Figure 3 shown, it further includes: a blocking member 51. The blocking member 51 is disposed in the exhaust passage 50, and the blocking member 51 divides the exhaust passage 50 into two non-communicating sub-channels.

[0089] When the battery pack has a thermal runaway, the gas can be quickly discharged through the exhaust passage 50. The blocking member 51 divides the exhaust passage 50 into two non-communicating sub-channels. Even if one of the sub-channels fails (such as being blocked or leaking), the other sub-channel can still continue to function, ensuring that the gas inside the battery pack can be discharged normally, reducing the internal pressure accumulation, and reducing the risk of explosion or fire. The arrangement of the two sub-channels can also ensure that the thermal runaway gas "goes its own way", preventing the reaction between gases. The separated sub-channels can more accurately control the gas flow direction and discharge rate, avoiding triggering safety accidents.

[0090] Thus, the provision of the plugging member 51 enables the exhaust passage 50 not only to effectively relieve the pressure of the battery pack, reducing the likelihood of the battery pack bulging, but also to reduce the occurrence of other safety hazards, enhancing the reliability of the side beam 100 and the safety of the battery pack.

[0091] The tray according to the second aspect embodiment of the present utility model includes the side beam 100 in the above embodiment.

[0092] For the tray according to the embodiment of the present utility model, by applying the side beam 100 in the above embodiment, the first reinforcing member 20, the second reinforcing member 30 and the third reinforcing member 33 are arranged inside the side beam 100, greatly enhancing the rigidity and stability of the tray and being able to effectively resist external force impacts from all directions. The provision of the first anti-collision structure 40 and the second anti-collision structure 42, as well as the chamber design provided inside them, provides additional collision protection for the tray. Especially during a frontal or side impact, it can absorb and disperse a large amount of impact force, effectively enhancing the reliability and stability of the tray.

[0093] The battery pack according to the third aspect embodiment of the present utility model includes: a tray and at least one battery cell group. The tray is the tray in the above embodiment; the battery cell group is arranged inside the tray, and the height of the battery cell group along the second direction B of the side beam 100 of the tray is less than or equal to the height of the side beam 100.

[0094] The height of the battery cell group inside the tray is less than or equal to the height of the side beam 100 of the tray, which enables both the tray and the battery cells to form a stress structure, effectively improving the overall strength and stiffness of the battery pack. When the battery pack is collided, due to the height of the side beam 100 of the tray being greater than the height of the battery cells, most of the impact force can be resisted by the side beam 100 of the tray, thereby improving the safety and stability of the battery cell group and at the same time improving the safety and stability of the battery pack.

[0095] In some embodiments, the corners of the side beam 100 of the tray are designed as right-angle structures instead of obtuse-angle structures, which can increase the space utilization rate inside the tray, thereby increasing the energy density of the battery pack.

[0096] For the battery pack according to the embodiment of the present utility model, by applying the tray in the above embodiment, the overall structural strength, collision safety and thermal management efficiency of the battery pack can be effectively improved. The battery cell group does not exceed the height of the side beam 100, so that when the battery pack is subjected to an external impact, the side beam 100 can provide a complete protection barrier, preventing the battery cells from directly bearing the impact force, reducing the risk of damage to the battery pack in an accident, and extending the service life and performance of the battery pack.

[0097] The electrical device according to the fourth aspect embodiment of the present utility model includes the battery pack in the above embodiment.

[0098] According to the electrical device of the embodiment of the present utility model, by applying the battery pack in the above embodiment, when the electrical device encounters a collision, the design of the inner side beam 100 in the battery pack can effectively absorb and disperse the impact force, protect the battery from damage, reduce the risk of fire or explosion, ensure the safety of the occupants, and improve the safety of the electrical device.

[0099] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0100] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more. In the description of the present utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. In the description of the present utility model, the first feature being "above", "above" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0101] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0102] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A side beam, characterized in that: include: A side beam body, wherein the side beam body defines a cavity, wherein the cavity includes a first side wall, a second side wall, and a third side wall, wherein the first side wall is opposite to the second side wall, and the third side wall is disposed between the first side wall and the second side wall; a first reinforcement member, wherein one end of the first reinforcement member is connected to the first side wall, and the other end of the first reinforcement member is respectively connected to the first side wall and the third side wall; a second reinforcement member, two ends of the second reinforcement member are respectively connected to two ends of the second side wall, and the first reinforcement member and the second reinforcement member are spaced apart; A third reinforcement member is provided between the first reinforcement member and the second reinforcement member, and the third reinforcement member is connected to the first reinforcement member and the second reinforcement member respectively.

2. The side beam according to claim 1, characterized in that: The first reinforcement member comprises: a first sub-component, one end of which is connected to the first side wall; a second sub-component, one end of the second sub-component being connected to the third side wall; a third sub-component, two ends of which are respectively connected to the other end of the first sub-component and the other end of the second sub-component; A fourth sub-component, one end of the fourth sub-component is connected to the first side wall, and the other end of the fourth sub-component is connected to the connection between the second sub-component and the third sub-component.

3. The side beam according to claim 2, characterized in that: The other end of the first sub-element extends obliquely along the first direction of the side beam toward the second side wall; and / or The other end of the second sub-element extends obliquely toward the first sub-element.

4. The side beam according to claim 3, characterized in that: The included angle between the first sub-element and the first side wall is α1, and α1 satisfies: 30°≤α1≤60°; and / or The included angle between the second sub-component and the third side wall is α2, and α2 satisfies: 30°≤α2≤60°.

5. The side beam according to claim 2, characterized in that: The fourth sub-component is arranged parallel to the third side wall.

6. The side beam according to claim 1, characterized in that: The second reinforcement member comprises: The fifth sub-component and the sixth sub-component, one end of the fifth sub-component and one end of the sixth sub-component are connected to each other, and the other end of the fifth sub-component and the other end of the sixth sub-component are respectively connected to the two ends of the second side wall.

7. The side beam according to claim 6, characterized in that: The angle between the one end of the fifth sub-component and the one end of the sixth sub-component is β, and β satisfies: 90°≤β<180°.

8. The side beam according to claim 6, characterized in that: Also includes: A third reinforcement member, one end of the third reinforcement member is connected to the one end of the fifth sub-member and the one end of the sixth sub-member, and the other end of the third reinforcement member is connected to the first reinforcement member.

9. The side beam according to claim 8, characterized in that: The third reinforcement member is arranged parallel to the third side wall.

10. The side beam according to claim 2, characterized in that: Also includes: a first anti-collision structure, the first anti-collision structure being arranged on a side of the first side wall away from the second side wall, the first anti-collision structure being connected to an end of the first side wall along the second direction of the side beam; A second anti-collision structure, wherein the second anti-collision structure is arranged on a side of the first side wall away from the second side wall, the second anti-collision structure is connected to the other end of the first side wall along the second direction of the side beam, and the first anti-collision structure and the second anti-collision structure are arranged at intervals along the second direction of the side beam.

11. The side beam according to claim 10, characterized in that: At least one chamber is provided in the first anti-collision structure and the second anti-collision structure.

12. The side beam according to claim 10, characterized in that: The first anti-collision structure includes: a fourth side wall, and the connection point between the fourth side wall and the first side wall and the connection point between the first sub-component and the first side wall are located on both sides of the first side wall along the first direction of the side beam and are opposite to each other along the first direction of the side beam.

13. The side beam according to claim 10, characterized in that: The second anti-collision structure includes: a fifth side wall, wherein a connection point between the fifth side wall and the first side wall and a connection point between the fourth sub-component and the first side wall are located on both sides of the first side wall along the first direction of the side beam and are opposite to each other along the first direction of the side beam.

14. The side beam according to claim 1, characterized in that: The first reinforcement and the second reinforcement divide the cavity into a first chamber, a second chamber and a third chamber. The first reinforcement and the first side wall and the third side wall define the first chamber, the second reinforcement and the second side wall define the second chamber, and the first reinforcement, the second reinforcement and the third reinforcement define the third chamber.

15. The side beam according to claim 14, characterized in that: The area of ​​the first chamber is S1, the area of ​​the second chamber is S2, and the area of ​​the third chamber is S3. S1, S2, and S3 satisfy: S1<S2<S3.

16. The side beam according to any one of claims 1 to 15, characterized in that: An exhaust channel is formed on the second side wall. A side of the exhaust channel facing the first side wall is formed as a curved surface. The curved surface protrudes toward the first side wall along a first direction of the side beam.

17. The side beam according to claim 16, characterized in that: Also includes: A blocking piece is arranged in the exhaust passage, and the blocking piece divides the exhaust passage into two sub-passages which are not connected to each other.

18. A pallet, characterized in that: Comprising the edge beam according to any one of claims 1-17.

19. A battery pack, characterized in that: include: A pallet, wherein the pallet is the pallet as claimed in claim 18; At least one battery cell group is disposed in the tray, and the height of the battery cell group along the second direction of the side beam of the tray is less than or equal to the height of the side beam.

20. An electrical device, characterized in that: Comprising a battery pack according to claim 19.

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