Battery tray edge beam, battery tray, battery pack, and vehicle

Abstract

The present invention provides an edge beam (23) for a battery tray (100), a battery tray (100), a battery pack (200), and a vehicle (2000). The edge beam (23) includes an edge beam body (231). The edge beam body (231) defines a cavity (2311). The edge beam body (231) has a partition portion (232). The partition portion (232) is located within the cavity. The partition portion (232) is connected between the top wall (233) and the bottom wall (234) of the cavity to partition the cavity (2311) into a first sub-cavity (2351) and a second sub-cavity (2352). The first sub-cavity (2351) and the second sub-cavity (2352) are arranged in sequence in a first direction of the edge beam (23). The cross-sectional area of the first sub-cavity (2351) is S1, the cross-sectional area of the second sub-cavity (2352) is S2, and 0.8 < S1 / S2 < 1 is satisfied.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the priority of Chinese Patent Application No. "2022102495003" named "Edge Beam for Battery Tray, Battery Tray, Battery Pack and Vehicle" filed by "BW Company Limited" on March 14, 2022.

[0002] This application relates to the field of batteries, and particularly to edge beams for battery trays, battery trays, battery packs and vehicles.

Background Art

[0003] In related technologies, a battery pack is provided with a battery tray. The battery tray includes a frame, and the frame includes an edge beam. Due to the insufficient structural strength and poor stability of the edge beam, the edge beam is easily deformed, which affects the service life of the edge beam. When the edge beam is subjected to an impact, the impact force transmitted to the inside of the battery pack is large, and the risk of damage to the battery core in the battery pack is high, which affects the use safety of the battery pack.

Summary of the Invention

Problems to be Solved by the Invention

[0004] This application aims to solve at least one of the technical problems in the prior art. Therefore, this application can not only improve the structural strength and rigidity of the edge beam, but also ensure that the mode of the battery pack is appropriate, absorb the impact force when the sub - cavity is subjected to an impact, reduce the impact force transmitted to the inside of the battery pack, thereby improving the use safety of the battery pack, reducing the risk of deformation of the edge beam, and extending the service life of the edge beam and the battery tray. The purpose is to provide an edge beam for a battery tray.

Means for Solving the Problems

[0005] The present application further provides a battery tray.

[0006] The present application further provides a battery pack.

[0007] The present application further provides a vehicle.

[0008] The edge beam for a battery tray having a placement groove for placing a battery core according to the present application includes an edge beam body, the edge beam body defines a cavity, the edge beam body has a partition portion, the partition portion is located in the cavity, the partition portion is connected between the top wall and the bottom wall of the cavity, the cavity is partitioned into a first sub-cavity and a second sub-cavity, the first sub-cavity and the second sub-cavity are arranged in sequence in the first direction of the edge beam, the cross-sectional area of the first sub-cavity is S1, the cross-sectional area of the second sub-cavity is S2, and 0.8 < S1 / S2 < 1 is satisfied.

[0009] In the edge beam for a battery tray according to the present application, the edge beam body of the present application can not only improve the structural strength and rigidity of the edge beam, but also ensure that the mode of the battery pack is appropriate, reduce the deformation risk of the edge beam, thereby extending the service life of the edge beam and the battery tray, and enhancing the impact protection of the battery pack when ensuring that the battery pack has an appropriate mode.

[0010] In some examples of the present application, in the first direction of the edge beam, the first sub-cavity is located between the second sub-cavity and the placement groove.

[0011] In some examples of the present application, the partition portion is inclined and connected between the top wall and the bottom wall of the cavity.

[0012] In some examples of the present application, in the direction from the upper end to the lower end of the edge beam, the partition portion is inclined in a direction away from the placement groove.

[0013] In some examples of this application, the cross-sectional shape of the first subcavity and the cross-sectional shape of the second subcavity are both triangular or trapezoidal.

[0014] In some examples of this application, the edge beam is constructed as an integrally molded product.

[0015] In some examples of the present application, in the width direction of the edge beam, the cavity has a first side wall provided away from the groove described above, the first side wall is connected between the top wall and the bottom wall of the cavity, and the first side wall is connected to the partition.

[0016] In some examples of the present application, a first connecting portion is connected to the lower end of the first side wall, extending into the cavity, the first connecting portion being located on the side of the bottom wall of the cavity toward the top wall of the cavity, the first side wall being connected to the bottom wall of the cavity and the partition via the first connecting portion, and the first connecting portion being fixedly connected to the bottom wall of the cavity.

[0017] In some examples of the present application, the cavity has a second side wall adjacent to the groove described above, the second side wall is connected between the top and bottom walls of the cavity, and the second side wall is connected to the partition.

[0018] In some examples of the present application, a second connecting portion is connected to the upper end of the second side wall, extending into the cavity, the second connecting portion being located on the side of the top wall of the cavity toward the bottom wall of the cavity, the second side wall being connected to the top wall of the cavity and the partition via the second connecting portion, and the second connecting portion being fixedly connected to the top wall of the cavity.

[0019] In some examples of the present application, the edge beam includes a support portion, the support portion is provided on the side of the edge beam body adjacent to the aforementioned mounting groove, and the support portion supports the battery core.

[0020] In some examples of the present invention, a support extending toward the groove described above is connected to the lower end of the second side wall, and the second side wall is connected to the bottom wall of the cavity via the support.

[0021] In some examples of the present application, the second side wall is connected at an angle between the top and bottom walls of the cavity, and in the direction from the upper end to the lower end of the edge beam, the second side wall is inclined toward the groove described above.

[0022] In some examples of the present application, in the width direction of the edge beam, the bottom wall of the cavity has a structural reinforcement that extends below the support, and the structural reinforcement is connected to the end of the support adjacent to the aforementioned groove.

[0023] In some examples of the present invention, the structural reinforcing portion is provided with a boss that protrudes toward the support portion, and the boss is connected to the support portion.

[0024] In some examples of the present application, in the width direction of the edge beam, the cavity has a first side wall provided away from the aforementioned groove, the first side wall connected between the top and bottom walls of the cavity, the cavity has a second side wall adjacent to the aforementioned groove, the second side wall connected between the top and bottom walls of the cavity, the top wall of the cavity, the bottom wall of the cavity, the first side wall and the second side wall together define the cavity, and the bottom wall of the cavity extends toward the aforementioned groove to form a support portion for supporting the battery core.

[0025] The battery tray according to this application includes the above-mentioned edge beam for the battery tray.

[0026] The battery tray according to the present application includes a tray bottom plate and a frame. The tray bottom plate includes a bottom plate body and an extending portion. The bottom plate body defines a placement groove for placing a battery core. The extending portion extends along the circumferential edge of the bottom plate body. The frame includes side beams, a front beam, and a rear beam. The side beam is the edge beam. The side beam, the front beam, and the rear beam are connected to form an attachment space. The bottom plate body is attached to the attachment space. In the height direction of the battery tray, the extending portion is located above the frame and provided on the frame. At least one of the side beam, the front beam, and the rear beam has a support portion extending toward the inside of the attachment space, and the support portion supports the tray bottom plate.

[0027] The battery pack according to the present application includes a battery core and a battery tray. The battery tray is the battery tray described above and has a placement groove. The battery core is placed in the placement groove.

[0028] The vehicle according to the present application includes the above-described battery pack.

[0029] Some of the additional aspects and advantages of the present application are shown in the following description, some will become clear in the following description, or will be understood by implementing the present application.

Brief Description of the Drawings

[0030] [Figure 1] It is an exploded view of a battery pack according to an embodiment of the present application. [Figure 2] It is a cross-sectional view of a battery pack according to an embodiment of the present application. [Figure 3] It is an enlarged view of part A in FIG. 2. [Figure 4] It is a schematic assembly view of a battery tray and a battery core according to an embodiment of the present application. [Figure 5] It is a schematic view of a battery tray according to an embodiment of the present application. [Figure 6] It is an exploded view of a battery tray according to an embodiment of the present application. [Figure 7] This is a schematic diagram of the tray bottom plate of the battery tray according to an embodiment of the present invention. [Figure 8] This is a schematic diagram of the frame of the battery tray according to an embodiment of the present invention. [Figure 9] This is a schematic diagram of the side beam of the battery tray according to an embodiment of the present invention. [Figure 10] This is an enlarged view of section B in Figure 9. [Figure 11] This is a partially enlarged view of an embodiment of the present invention, showing the battery tray and battery core assembled. [Figure 12] This is a cross-sectional view of an edge beam according to an embodiment of the present application. [Figure 13] This is a schematic diagram of another embodiment of the edge beam according to the embodiment of the present application. [Figure 14] This is a schematic diagram of a vehicle according to an embodiment of the present invention. [Modes for carrying out the invention]

[0031] The embodiments of the present application will be described in detail below, and examples of the above embodiments are shown in the drawings. Throughout, the same or similar reference numerals indicate the same or similar parts or parts having the same or similar function. The embodiments described below with reference to the drawings are illustrative and are for interpretation purposes only, and should not be understood as limiting the present application.

[0032] The edge beams 23 for the battery tray 100 according to the embodiment of the present application will be described below with reference to Figures 1 to 13. Multiple edge beams 23 are connected to form a frame 20 of the battery tray 100, the frame 20 defines a mounting space 21, the battery tray 100 is applied to a battery pack 200, the battery tray 100 has a tray bottom plate 10 that supports a battery core 201, and the edge beams 23 are connected to the tray bottom plate 10. The battery tray 100 has a mounting groove 111 on which the battery core 201 is placed.

[0033] As shown in Figures 1 to 13, the edge beam 23 according to the embodiment of the present application includes an edge beam body 231, the edge beam body 231 defines a cavity 2311, the edge beam body 231 has a partition portion 232, the partition portion 232 is located within the cavity, the partition portion 232 is connected between the top wall 233 and the bottom wall 234 of the cavity 2311, and the partition portion 232 divides the cavity 2311 into a first sub-cavity The first sub-cavity 2351 and the second sub-cavity 2352 can be separated, and the first sub-cavity 2351 and the second sub-cavity 2352 are arranged sequentially in the first direction of the edge beam 23, the first direction of the edge beam 23 refers to the width direction of the edge beam 23 or the width direction of the battery tray 100 or the longitudinal direction of the battery tray 100, and when the battery tray 100 is arranged in the arrangement method in Figure 11, the width direction of the edge beam 23 refers to the left-right direction in Figure 11. The partition section 232 is connected between the top wall 233 and the bottom wall 234 of the cavity 2311, and can partition the cavity 2311 into multiple sub-cavities 235. When the partition section 232 partitions the cavity 2311 into two sub-cavities 235, the two sub-cavities 235 are the first sub-cavity 2351 and the second sub-cavity 2352, respectively. When the partition section 232 partitions the cavity 2311 into four sub-cavities 235, the four sub-cavities 235 are arranged sequentially in the first direction of the edge beam 23, and two adjacent sub-cavities 235 are the second When one subcavity 2351 is formed and the other two adjacent subcavities 235 form a second subcavity 2352, and the partition 232 divides the cavity 2311 into six subcavities 235, the six subcavities 235 are arranged sequentially in the first direction of the edge beam 23, with three adjacent subcavities 235 forming a first subcavity 2351 and the other three adjacent subcavities 235 forming a second subcavity 2352, and by analogy, the present invention will explain, as an example, when the partition 232 divides the cavity 2311 into two subcavities 235.

[0034] The cross-sectional area of the first sub-cavity 2351 is S1, the cross-sectional area of the second sub-cavity 2352 is S2, and 0.8 < S1 / S2 < 1 is satisfied. Further, 0.8 < S1 / S2 < 0.99 is satisfied. The cross-sectional area of the first sub-cavity 2351 is the cross-sectional area in the width direction of the edge beam 23, that is, the cross-sectional area perpendicular to the longitudinal direction of the edge beam 23 of the first sub-cavity 2351. The cross-sectional area of the second sub-cavity 2352 is the cross-sectional area in the width direction of the edge beam 23, that is, the cross-sectional area perpendicular to the longitudinal direction of the edge beam 23 of the second sub-cavity 2352. By partitioning the cavity 2311 into the first sub-cavity 2351 and the second sub-cavity 2352 by the partition portion 232, the structural strength and rigidity of the edge beam 23 can be improved, and the deformation risk of the edge beam 23 can be reduced. Thereby, the service life of the edge beam 23 and the battery tray 100 can be extended. Also, when the sub-cavity 235 away from the mounting space 21 of the battery tray 100 in the first sub-cavity 2351 and the second sub-cavity 2352 is impacted, the impacted sub-cavity 235 can absorb the impact force, reduce the impact force transmitted to the inside of the battery pack 200, and reduce the risk of damage to the battery core 201 in the battery pack 200. Thereby, the use safety of the battery pack 200 can be improved. Also, when 0.8 < S1 / S2 < 1 is satisfied, it is ensured that the mode of the battery pack 200 is appropriate, the probability of resonance of the battery pack 200 can be reduced, and when it is ensured that the battery pack 200 has an appropriate mode, the impact protection of the battery pack 200 can be enhanced, and the battery pack 200 can balance between the mode of the whole pack and the impact protection of the vehicle.In some embodiments of the present invention, the partition portion 232 is connected at an angle between the top wall 233 and the bottom wall 234 of the cavity 2311, and by connecting the partition portion 232 at an angle between the top wall 233 and the bottom wall 234 of the cavity 2311, the partition portion 232 is reliably supported between the top wall 233 and the bottom wall 234 of the cavity 2311, improving the structural strength and rigidity of the edge beam body 231, improving the structural stability of the edge beam body 231, and reducing the risk of deformation of the edge beam 23, thereby extending the service life of the edge beam 23 and the battery tray 100.

[0035] In some embodiments of the present application, as shown in Figure 12, in a first direction of the edge beam 23, the first subcavity 2351 may be understood to be located between the second subcavity 2352 and the mounting groove 111, and between the second subcavity 2352 and the mounting space 21 of the battery tray 100. When the edge beam 23 is arranged in the configuration shown in Figure 12, the left side of the edge beam 23 is the mounting groove 111, the left subcavity 235 is the first subcavity 2351, and the right subcavity 235 is the second subcavity 2352. By arranging the first subcavity 2351 and the second subcavity 2352 sequentially in the width direction of the edge beam 23, if one of the subcavities 235 that is away from the mounting groove 111 is subjected to an impact, that is, if the second subcavity 2352 located on the right side in Figure 12 is subjected to an impact, the impacted second subcavity 2352 can absorb the impact force, reducing the impact force transmitted to the inside of the battery pack 200 and reducing the risk of damage to the battery core 201 inside the battery pack 200, thereby improving the safety of use of the battery pack 200.

[0036] In the battery pack 200, the cross-sectional area of the sub-cavity 235 close to the placement groove 111 greatly affects the mode of the battery pack 200. That is, the cross-sectional area of the first sub-cavity 2351 greatly affects the mode of the battery pack 200. The larger the cross-sectional area S1 of the first sub-cavity 2351, the worse the rigidity of the battery pack 200. The lower the mode of the battery pack 200, the greater the probability that the battery pack 200 resonates. The cross-sectional area of the sub-cavity 235 away from the placement groove 111 greatly affects the impact protection of the vehicle. That is, the cross-sectional area of the second sub-cavity 2352 greatly affects the impact protection of the vehicle. The larger the cross-sectional area S2 of the second sub-cavity 2352, the smaller the pressure-receiving area of the second sub-cavity 2352. When the vehicle receives an impact external force, the smaller the energy that the edge beam 23 can absorb, the greater the risk of impact safety. Therefore, by setting 0.8 < S1 / S2 < 1, it is possible to ensure that the mode of the battery pack 200 is appropriate, reduce the probability that the battery pack 200 resonates, and when ensuring that the battery pack 200 has an appropriate mode, improve the impact protection of the battery pack 200, so that the battery pack 200 can balance between the mode of the whole pack and the impact protection of the vehicle.

[0037] In some embodiments of the present application, as shown in FIGS. 11 and 12, when the edge beam 23 is arranged in the arrangement manner in FIG. 11, in the direction from the upper end to the lower end of the edge beam 23, the partition portion 232 is inclined in a direction away from the placement groove 111. It may be understood that the partition portion 232 is inclined in a direction away from the mounting space 21 of the battery tray 100. In the direction from above to below the battery tray 100, it may be understood that the partition portion 232 extends inclined in a direction away from the placement groove 111. The partition portion 232 partitions the cavity 2311 into the first sub-cavity 2351 and the second sub-cavity 2352. In this way, the structural strength of the edge beam 23 can be improved, the stability of the edge beam 23 can be improved, and thereby, the ability of the edge beam 23 to support the battery core 201 can be improved, and the deformation risk of the frame 20 can also be further reduced.

[0038] In some embodiments of the present application, the partition 232 is connected perpendicularly between the top wall 233 and the bottom wall 234 of the cavity 2311. In this way, the partition 232 can be more securely supported between the top wall 233 and the bottom wall 234 of the cavity 2311, improving the structural strength of the edge beam 23 and improving the stability of the edge beam 23, thereby improving the edge beam 23's ability to support the battery core 201 and further reducing the risk of deformation of the frame 20.

[0039] In some embodiments of the present invention, as shown in Figures 11 and 12, the cross-sectional shape of the first subcavity 2351 and the cross-sectional shape of the second subcavity 2352 are both triangular or trapezoidal. In this way, the structural stability of the edge beam 23 can be improved, the risk of deformation of the edge beam 23 can be further reduced, and the service life of the edge beam 23 and the battery tray 100 can be further extended.

[0040] In one specific embodiment of the present invention, the first subcavity 2351 is located on the side adjacent to the mounting space 21 of the second subcavity 2352, the cross-sectional shape of the first subcavity 2351 is triangular, and furthermore, the triangle is an isosceles triangle or an equilateral triangle, and the bottom wall 234 of the cavity 2311 constitutes a triangular bottom wall, in which case the structural stability of the edge beam 23 can be further improved and the risk of deformation of the edge beam 23 can be further reduced, thereby further extending the service life of the edge beam 23 and the battery tray 100.

[0041] In some alternative embodiments, the angle between the bottom wall 234 of the cavity 2311 and the partition 232 is configured as the base angle of a triangle, where the angle of the base angle is β1, satisfying 50° ≤ β1 ≤ 70°, for example β1 is 60°. In this way, the structural stability of the edge beam 23 can be further improved and the risk of deformation of the edge beam 23 can be further reduced, thereby further extending the service life of the edge beam 23 and the battery tray 100.

[0042] In some alternative embodiments, the vertex angle of the triangle is α1, satisfying 50° ≤ α1 ≤ 70°, for example, α1 is 60°. By making the cross-sectional shape of the first subcavity 2351 an equilateral triangle in this way, the structural stability of the edge beam 23 can be further improved and the risk of deformation of the edge beam 23 can be further reduced, thereby further extending the service life of the edge beam 23 and the battery tray 100.

[0043] In another specific embodiment of the present invention, as shown in Figures 11 and 12, in the width direction of the edge beam 23, the first subcavity 2351 is located on the side adjacent to the mounting groove 111 of the second subcavity 2352, the cross-sectional shape of the first subcavity 2351 is trapezoidal, and furthermore, the bottom wall 234 of the cavity 2311 is configured as a trapezoidal bottom wall, and the angle between the bottom wall 234 of the cavity 2311 and the partition 232 is structured as the trapezoidal bottom angle of the first subcavity 2351, the angle of the bottom angle is β2, satisfying 50° ≤ β2 ≤ 70°, for example β2 is 60°, in which case the structural stability of the edge beam 23 can be further improved and the risk of deformation of the edge beam 23 can be further reduced, thereby further extending the service life of the edge beam 23 and the battery tray 100.

[0044] In some alternative embodiments, as shown in Figure 12, the angle between the two trapezoidal legs of the first subcavity 2351 is α2, satisfying 50° ≤ α2 ≤ 70°, for example, α2 is 60°. In this way, the structural stability of the edge beam 23 can be further improved and the risk of deformation of the edge beam 23 can be further reduced, thereby further extending the service life of the edge beam 23 and the battery tray 100.

[0045] In some embodiments of the present invention, as shown in Figure 12, the cross-sectional shape of the second subcavity 2352 is trapezoidal, the bottom wall 234 of cavity 2311 constitutes the trapezoidal top wall of the second subcavity 2352, and the top wall 233 of cavity 2311 constitutes the trapezoidal bottom wall of the second subcavity 2352. In this way, the structural stability of the edge beam 23 can be further improved and the risk of deformation of the edge beam 23 can be further reduced, thereby further extending the service life of the edge beam 23 and the battery tray 100.

[0046] In some embodiments of the present invention, the edge beam body 231 further has a support portion 22 extending toward the mounting groove 111 of the battery tray 100, the support portion 22 being located below the tray bottom plate 10, the support portion 22 supporting the battery core 201 within the tray bottom plate 10, the edge beam 23 mainly supporting the weight of the battery core 201, the tray bottom plate 10 of the battery tray 100 supporting a small portion of the weight of the battery core 201, and significantly reducing the load-bearing requirements of the tray bottom plate 10.

[0047] In some embodiments of the present application, the edge beam 23 is constructed as a single molded product, as shown in Figures 12 and 13. Furthermore, the edge beam 23 may be manufactured from aluminum, or from steel, but the present application is not limited to these, and the edge beam 23 may be manufactured from other metallic materials that perform the same function as steel. For example, the edge beam 23 may be manufactured from steel, formed by roll-rolling steel, or formed by extruding steel. By making the edge beam 23 a single molded product, the load-bearing capacity of the edge beam 23 can be improved and the risk of deformation of the edge beam 23 can be reduced. In addition, an edge beam 23 made from steel can withstand high temperatures of 1500°C or higher, ensuring the integrity of the battery core 201 of the edge beam 23 during thermal runaway.

[0048] In one embodiment of the present invention, as shown in Figures 10 and 11, in the width direction of the edge beam 23, the cavity 2311 has a first side wall 236 provided away from the mounting groove 111, the first side wall 236 is connected between the top wall 233 and the bottom wall 234 of the cavity 2311, and the first side wall 236 is connected to the partition 232. In some alternative embodiments, as shown in Figure 11, a first connecting portion 238 extending into the cavity 2311 is connected to the lower end of the first side wall 236, the first connecting portion 238 is located on the side of the bottom wall 234 of the cavity 2311 toward the top wall 233 of the cavity 2311, the first side wall 236 is connected to the bottom wall 234 and partition portion 232 of the cavity 2311 via the first connecting portion 238, the first connecting portion 238 is fixedly connected to the bottom wall 234 of the cavity 2311, for example, the first connecting portion 238 is welded to the bottom wall 234 of the cavity 2311, in which case the structural strength of the edge beam 23 can be further improved and the stability of the edge beam 23 can be further improved.

[0049] In some alternative embodiments, as shown in Figures 10 and 11, in the width direction of the edge beam 23, the cavity 2311 has a second side wall 237 adjacent to the mounting groove 111, the second side wall 237 is connected between the top wall 233 and the bottom wall 234 of the cavity 2311, and the second side wall 237 is connected to the partition 232. In some alternative embodiments, as shown in Figure 11, the upper end of the second side wall 237 is connected to a second connecting portion 239 extending into the cavity 2311, the second connecting portion 239 is located on the side of the top wall 233 of the cavity 2311 toward the bottom wall 234 of the cavity 2311, the second side wall 237 is connected to the top wall 233 and the partition 232 of the cavity 2311 via the second connecting portion 239, the second connecting portion 239 is The second connection portion 239 is fixedly connected to the top wall 233 of the cavity 2311, for example, and the top wall 233, bottom wall 234, first side wall 236, and second side wall 237 of the cavity 2311 together define the cavity 2311, thereby further improving the structural strength of the edge beam 23 and further improving the stability of the edge beam 23.

[0050] In some alternative embodiments, as shown in Figures 10 and 11, the edge beam 23 includes a support portion 22, which is provided on the side of the edge beam body 231 adjacent to the mounting groove 111, and the support portion 22 supports the battery core 201. That is, the edge beam body 231 is connected to a support portion 22 that extends toward the mounting groove 111, and the support portion 22 supports the battery core 201 in the tray bottom plate 10 of the battery tray 100, and the support portion 22 is supported on the underside of the tray bottom plate 10 and supports the battery core 201, the edge beam 23 supports most of the weight of the battery core 201, and the tray bottom plate 10 of the battery tray 100 does not support the weight of the battery core 201 or supports only a small portion of the weight of the battery core 201, significantly reducing the load-bearing requirements of the tray bottom plate 10.

[0051] In some alternative embodiments, a support portion 22 extending toward the mounting groove 111 is connected to the lower end of the second side wall 237, and the support portion 22 can support the tray bottom plate 10, and the second side wall 237 is connected to the bottom wall 234 of the cavity 2311 via the support portion 22. In some alternative embodiments, as shown in Figure 12, in the width direction of the edge beam 23, the bottom wall 234 of the cavity 2311 has a structural reinforcement 2341 that extends below the support 22, and the structural reinforcement 2341 is connected to the end of the support 22 that is close to the tray bottom plate 10, and the structural reinforcement 2341 may be understood as extending below the support 22, and the end of the bottom wall 234 of the cavity 2311 that is close to the mounting groove 111 is connected to the end of the structural reinforcement 2341 that is close to the mounting groove 111, and furthermore the structural reinforcement 2341 is provided with a boss (i.e., a boss structure 2391) that protrudes toward the support 22, and the boss structure 2391 is connected to the support 22, in which case the structural strength of the edge beam 23 can be further improved and the stability of the edge beam 23 can be further improved.

[0052] In some alternative embodiments, the structural reinforcement section 2341 is provided with a plurality of boss structures 2391, which are arranged sequentially in the width direction of the edge beam 23, and at least one of the boss structures 2391 is located below the battery core 201, so that the boss structures 2391 can support the battery core 201, further improving the load-bearing capacity of the frame 20 and reducing the risk of deformation of the support section 22.

[0053] In another embodiment of the present application, as shown in Figure 13, in the width direction of the edge beam 23, the cavity 2311 has a first side wall 236 provided away from the mounting groove 111, the first side wall 236 is connected between the top wall 233 and the bottom wall 234 of the cavity 2311, and the cavity 2311 has a second side wall 237 adjacent to the mounting groove 111, the second side wall 237 is connected between the top wall 233 and the bottom wall 234 of the cavity 2311, and the cavity 23 The top wall 233 of the 11, the bottom wall 234 of the cavity 2311, the first side wall 236, and the second side wall 237 all define the cavity 2311, and the bottom wall 234 of the cavity 2311 extends toward the mounting groove 111 to form a support portion 22 for supporting the tray bottom plate 10, the support portion 22 is located below the tray bottom plate 10 and extends toward below the battery core 201, so that the support portion 22 can support the battery core 201 and further improve the load-bearing capacity of the edge beam 23.

[0054] In some embodiments of the present invention, the second side wall 237 is connected at an angle between the top wall 233 and the bottom wall 234 of the cavity 2311, and in the direction from the upper end to the lower end of the edge beam 23, the second side wall 237 is provided at an angle toward approaching the mounting groove 111, thereby further improving the structural strength of the edge beam 23 and further improving the stability of the edge beam 23, thereby further improving the ability of the edge beam 23 to support the battery core 201 and further reducing the risk of deformation of the frame 20.

[0055] As shown in Figures 1 to 13, the battery tray 100 according to the embodiment of the present application includes a tray base plate 10 (the tray base plate 10 in the above embodiment) and a frame 20 (the frame 20 in the above embodiment). The tray base plate 10 includes a base plate body 11 and an extended portion 12, the base plate body 11 defining a mounting groove 111 on which a battery core 201 or battery module is mounted, and the present application describes, as an example, the mounting of the battery core 201 in the mounting groove 111, although the battery core 201 may be bonded to the mounting groove 111 with a structural adhesive. In some embodiments, the mounting groove 111 has a bottom wall 113, and the bottom wall 113 has a pressure-receiving region 112 that supports the battery core 201, and the pressure-receiving region 112 refers to the region in the height direction of the battery tray 100 where the orthographic projection of the bottom wall 113 of the mounting groove and the orthographic projection of the battery core 201 overlap when the battery core 201 is mounted in the mounting groove 111, or it may be understood as the contact region between the battery core 201 and the bottom wall 113 of the mounting groove when the battery core 201 is mounted in the mounting groove 111, and the contact region This includes areas where the battery core 201 and the bottom wall 113 of the mounting groove are in direct or indirect contact. For example, if there is an adhesive or cooling structure between the battery core 201 and the bottom wall 113 of the mounting groove, the battery core 201 and the bottom wall 113 of the mounting groove are indirectly in contact. If there is no other object between the battery core 201 and the bottom wall 113 of the mounting groove, the battery core 201 and the bottom wall 113 of the mounting groove are in direct contact. The pressure-receiving area 112 may be understood as the area where the weight of the battery core 201 directly acts on the bottom wall 113 of the mounting groove. In the height direction of the battery tray 100, the orthographic projection of the bottom wall 113 of the mounting groove is the projection of the bottom wall 113 of the mounting groove onto a plane perpendicular to the height direction of the battery tray 100. In the height direction of the battery tray 100, the orthographic projection of the battery core 201 is the projection of the battery core 201 onto a plane perpendicular to the height direction of the battery tray 100.

[0056] When the battery core 201 is installed in the battery tray 100, the battery core 201 is located within the pressure-receiving area 112 of the mounting groove 111, the extended portion 12 extends along the circumferential edge of the bottom plate body 11, and furthermore, the extended portion 12 is configured as an annular structure, specifically as a closed annular structure.

[0057] The frame 20 defines the mounting space 21, the base plate body 11 is attached to the frame 20, and furthermore, the base plate body 11 is fixedly attached to the frame 20, the base plate body 11 may be glued to the frame 20, or the base plate body 11 may be attached to the frame 20 by bolts, and the specific assembly method of the base plate body 11 and the frame 20 is not specifically limited and can be selected according to the actual requirements. The base plate body 11 is mounted within the mounting space 21, the extension portion 12 is located outside the mounting space 21, and in the height direction of the battery tray 100, the extension portion 12 is located above the frame 20 and is provided on the frame 20.

[0058] In some embodiments of the present application, as shown in Figures 6 and 8, the frame 20 includes side beams, a front beam 24 and a rear beam 25, and at least one of the side beams, front beam 24 and rear beam 25 is the edge beam 23 in the above embodiments. Side beam The front beam 24 and the rear beam 25 are connected to form a mounting space 21, and the connections between the side beam, front beam 24 and rear beam 25 include direct and indirect connections. For example, the connection between the side beam and the front beam 24 may be directly connected, or it may be indirectly connected via other beams.

[0059] In some alternative embodiments, the side beams and / or front beam 24 and / or rear beam 25 may be understood as having support portions 22 extending into the mounting space 21, and at least one of the side beams, front beam 24 and rear beam 25 may be understood as having a support portion 22 extending into the mounting space 21, the support portion 22 supporting the tray bottom plate 10. The number of side beams may be two, and the number of rear beam 25 and front beam 24 may each be one, and when the frame 20 is arranged in the arrangement shown in Figure 8, the two side beams are spaced apart in the left-right direction in Figure 8, the front beam 24 and rear beam 25 are both connected between the two side beams, and the front beam 24 and rear beam 25 are spaced apart in the front-rear direction of the frame 20, so that the front beam 24, rear beam 25 and the two side beams together define the mounting space 21. Furthermore, if the battery cores 201 extend along the left-right direction in Figure 8, providing the support portion 22 on the side beam ensures that each battery core 201 is supported by the support portion 22, further ensuring that the support portion 22 supports the battery cores 201, and further ensuring that the frame 20 mainly supports the weight of the battery cores 201, thereby allowing the support portion 22 to be positioned in a reasonable location. As can be understood, when the battery tray 100 is mounted on the vehicle 2000, the width direction of the battery tray 100 may coincide with the width direction of the vehicle, and the longitudinal direction of the battery tray 100 may coincide with the longitudinal direction of the vehicle. Naturally, the width direction of the battery tray 100 may coincide with the longitudinal direction of the vehicle, and the longitudinal direction of the battery tray 100 may coincide with the width direction of the vehicle.

[0060] Furthermore, the support portion 22 supports the pressure-receiving area 112 of the tray bottom plate 10. As shown in Figures 6, 8, and 11, the present invention will be described as an example in which the battery tray 100 is arranged along the vertical direction. After the bottom plate body 11 is installed in the mounting space 21, the extension portion 12 is provided outside the mounting space 21, and in the vertical direction of the battery tray 100, the extension portion 12 is provided corresponding to the frame 20, and specifically, as shown in Figure 11, the extension portion 12 is located above the frame 20, and the extension portion 12 is provided aligned with the frame 20, and in the vertical direction of the battery tray 100, the extension portion 12 can cover the entire upper surface of the frame 20.

[0061] As shown in Figure 11, when the battery core 201 is mounted in the mounting groove 111, the battery core 201 is located within the pressure-receiving area 112, the support portion 22 supports the pressure-receiving area 112, the weight of the battery core 201 is supported by the frame 20, the frame 20 supports most of the weight of the battery core 201, the tray bottom plate 10 does not support the weight of the battery core 201 or supports only a small portion of the weight of the battery core 201, the load-bearing requirements of the tray bottom plate 10 can be greatly reduced, and the tray bottom plate 10 may be manufactured from a material with lower strength and thinner. In some alternative embodiments, the tray bottom plate 10 is configured as a non-metallic component. In some alternative embodiments, the tray bottom plate 10 is configured as an insulating component and can be manufactured from a lightweight non-metallic composite material. For example, the lightweight non-metallic composite material may consist of resin and glass fiber, and the resin may be epoxy resin or polyurethane. However, the present invention is not limited to these, and the lightweight composite material may consist of other composite materials that perform the same function as resin and glass fiber. In this way, the weight of the tray bottom plate 10 can be reduced, which is advantageous for the lightweight design of the battery tray 100 and battery pack 200. Furthermore, conventional tray bottom plates 10 are manufactured from aluminum, but the present invention uses a tray bottom plate 10 manufactured from a non-metallic composite material, which reduces the production cost of the tray bottom plate 10 and is advantageous for reducing the production cost of the battery tray 100 and battery pack 200. Moreover, the tray bottom plate 10 manufactured from a non-metallic composite material has excellent electrical insulation properties, and in the event of a serious bottoming-out accident in the vehicle 2000, the battery pack 200 will not experience high-voltage risks such as arc discharge.

[0062] In some alternative embodiments, the tray bottom plate 10 is constructed as a single molded product. The tray bottom plate 10 is press-molded from a lightweight non-metallic composite material. During press molding, the resin melts, flows, and hardens, after which the tray bottom plate 10 forms good airtightness. Molding using a mold ensures good flatness and dimensional accuracy of the tray bottom plate 10, thus guaranteeing the sealing function of the tray bottom plate 10. The frame 20 may be formed by metal tailored blank welding. After being formed by tailored blank welding, only the strength of the welded structure and the required product flatness need to be ensured. Tailored blank welding is highly efficient, improving the production efficiency of the battery tray 100. The tray bottom plate 10 plays a sealing role, eliminating the need for grinding of weld seams and airtightness inspection, thus eliminating the risk of sealing defects due to welding. The tray bottom plate 10 may also be press-molded from a composite material. This allows for high production efficiency of the tray bottom plate 10, high mold accuracy, high flatness, and a reduction in the dimensional requirements of the battery core 201.

[0063] Furthermore, conventional battery trays 100 do not distinguish between load-bearing and sealing functions in their product structure, and both overall load-bearing capacity and sealing must be considered when manufacturing the battery tray 100, resulting in low manufacturing efficiency and a low yield rate. In this invention, load-bearing and sealing functions are distinguished, with the frame 20 primarily responsible for load-bearing and the tray bottom plate 10 primarily responsible for sealing, thereby improving the manufacturing efficiency and yield rate of the battery tray 100.

[0064] As a result, the tray base plate 10 and the frame 20 work together such that the frame 20 mainly supports the weight of the battery core 201, and the tray base plate 10 supports only a small portion of the weight of the battery core 201, with the tray base plate 10 mainly performing the sealing role. This allows the thickness of the tray base plate 10 to be reduced, and the tray base plate 10 can be manufactured from a lightweight composite material, which is advantageous for the lightweight design and cost reduction of the battery tray 100 and battery pack 200. Furthermore, after the tray base plate 10 and the frame 20 are assembled, there is no risk of sealing defects in the battery tray 100 due to welding, and there is no need to grind the weld seams or perform airtightness testing of the battery tray 100, thus improving the production efficiency of the battery tray 100.

[0065] In some embodiments of the present invention, the tray base plate 10 and the frame 20 are sealed together. The frame 20 is provided with a plurality of bolt holes 28, and the extension portion 12 is provided with a plurality of relief through holes 122, with the bolt holes 28 corresponding one-to-one with the relief through holes 122, and a plurality of blind nuts are embedded in the frame 20, with the blind nuts corresponding one-to-one with the bolt holes 28, and the blind nuts pass through the relief through holes 122 and the bolt holes 28. The battery pack 200 includes a lid 40, and together the lid 40 and the tray base plate 10 define a mounting cavity 41 on which a battery core 201 is mounted, and the lid 40 is connected to the frame 20. Furthermore, the lid 40 is fitted over the open end of the mounting groove 111 so as to define the mounting cavity 41, and the extension 12 is interposed between the lid 40 and the frame 20. The lid 40, tray bottom plate 10, and frame 20 are assembled by connecting bolts through the relief through holes 122 in the lid 40 and extension 12 and the bolt holes 28 in the frame 20 to blind nuts. By sealing the connection between the tray bottom plate 10 and the frame 20, the bolts and bolt holes 28 are sealed, improving the sealing performance of the battery tray 100, preventing water vapor from flowing into the mounting groove 111 from the bolt holes 28 in the frame 20, and preventing short circuits in the battery pack 200, thereby improving the safety of use of the battery pack 200.

[0066] In some embodiments of the present application, as shown in Figure 11, the tray base plate 10 and the frame 20 are sealed and connected by a sealing structure 13. The sealing structure 13 may be configured as a sealant, or as a rubber member. However, the present application is not limited to these, and the sealing structure 13 may be configured as a sealing member that performs the same function as a sealant. The sealing structure 13 may be interposed in the entire space between the tray base plate 10 and the frame 20, or in a portion of the space between the tray base plate 10 and the frame 20. The sealing structure 13 may be provided around the bolt holes 28 and the relief through holes 122. Furthermore, the sealing structure 13 may be inserted into the bolt holes 28 and the relief through holes 122. In this way, a sealed connection between the tray base plate 10 and the frame 20 can be achieved, effectively preventing water vapor from flowing into the mounting cavity 41 from the bolt holes 28 of the frame 20.

[0067] In some embodiments of the present invention, as shown in Figure 11, a sealing structure 13 is provided between the extended portion 12 and the frame 20, and a relief through-hole 122 is provided in the extended portion 12. By providing the sealing structure 13 between the extended portion 12 and the frame 20, it is possible to ensure that the sealing structure 13 seals the bolt hole 28 and the relief through-hole 122, and the sealing structure 13 can be provided in a reasonable position.

[0068] In some embodiments of the present invention, as shown in Figure 11, when the battery tray 100 is arranged in the arrangement shown in Figure 11, the orthographic projection of the support portion 22 and the orthographic projection of the pressure receiving area 112 have an overlapping area in the height direction of the battery tray 100, and after the battery core 201 is placed in the mounting groove 111, it is possible to ensure that the support portion 22 supports the battery core 201 and that the frame 20 mainly supports the weight of the battery core 201.

[0069] In some embodiments of the present application, a pressure-receiving region 112 may be understood to be formed on the bottom wall 113 of the mounting groove 111, and the pressure-receiving region 112 may be provided on the bottom wall 113 of the mounting groove 111. As shown in Figure 11, when the battery tray 100 is arranged in the arrangement shown in Figure 11, the support portion 22 is located below the bottom plate body 11 and the support portion 22 is supported by the bottom wall 113. In this way, it is possible to ensure that the support portion 22 is supported below the pressure-receiving region 112, further ensuring that the support portion 22 supports the battery core 201, and further ensuring that the frame 20 mainly supports the weight of the battery core 201, thereby allowing the pressure-receiving region 112 to be provided in a reasonable position.

[0070] In some embodiments of the present invention, as shown in Figure 8, the frame 20 further includes a support beam 26, the support beam 26 being connected between two edge beams 23, or between a front beam 24 and a rear beam 25, or between a front beam 24 and an edge beam 23, or between a rear beam 25 and an edge beam 23, and in this way the structural strength of the frame 20 can be improved, and thus the structural strength of the battery tray 100 can be improved.

[0071] In some embodiments of the present invention, as shown in Figures 5 and 6, the battery tray 100 further includes an expansion beam 27, the expansion beam 27 being provided on the side of the tray base plate 10 away from the frame 20, and when the battery tray 100 is arranged in the manner shown in Figures 5 and 6, the expansion beam 27 is provided above the tray base plate 10, the expansion beam 27 is attached to the support beam 26 by bolts, and after the battery core 201 is installed in the mounting groove 111 and the battery core 201 expands, the expansion beam 27 can restrict the position of the battery core 201, thereby improving the safety of use of the battery core 201.

[0072] Furthermore, there are multiple support beams 26, which are arranged sequentially at intervals along the longitudinal direction of the edge beam 23 (the longitudinal direction of the edge beam 23 refers to the front-to-back direction in Figure 6), and there are multiple expansion beams 27, which are arranged sequentially at intervals along the longitudinal direction of the edge beam 23. There is a one-to-one correspondence between the multiple expansion beams 27 and the multiple support beams 26, and each expansion beam 27 is attached to one support beam 26 by bolts, thereby allowing the expansion beams 27 to be firmly attached to the frame 20.

[0073] In some embodiments of the present application, as shown in Figure 11, the support portion 22 may be understood to be provided close to the lower end of the edge beam 23 and close to the end of the edge beam 23 away from the tray bottom plate 10. After the bottom plate body 11 is installed in the mounting space 21, providing the support portion 22 close to the end of the edge beam 23 away from the tray bottom plate 10 ensures that the support portion 22 is supported below the bottom plate body 11 and also ensures that the bottom plate body 11 is installed in the mounting space 21.

[0074] In some embodiments of the present invention, as shown in Figures 5 to 7 and Figure 11, when the battery tray 100 is arranged in the arrangement shown in Figure 11, the upper end of the mounting groove 111 is provided as an open opening, and the battery core 201 can be inserted into the mounting groove 111 from the open end. Furthermore, the extension portion 12 extends circumferentially along the open end of the mounting groove 111, and as shown in Figure 11, the extension portion 12 is connected to the upper end of the base plate body 11, and after the base plate body 11 is installed in the mounting space 21, the extension portion 12 can be provided outside the mounting groove 111 in this way, and it is possible to ensure that the extension portion 12 is provided corresponding to the frame 20 in the vertical direction of the battery tray 100, thereby ensuring the sealing of the battery tray 100.

[0075] In some embodiments of the present invention, as shown in Figures 8, 10, and 11, the surface of the support portion 22 adjacent to the tray bottom plate 10 is configured as a flat surface, that is, as shown in Figure 11, the upper surface of the support portion 22 is made flat, and in this way the support area between the support portion 22 and the bottom plate body 11 can be guaranteed, and the support portion 22 can better support the battery core 201.

[0076] In some embodiments of this application, the support portion 22 is located below the base plate body 11 and is fixedly connected to the base plate body 11. In some alternative embodiments, the tray base plate 10 is bonded to the frame 20. Furthermore, by applying an adhesive (e.g., structural adhesive) between the tray base plate 10 and the frame 20, the support portion 22 and the base plate body 11 are bonded and connected. By controlling the thickness of the adhesive, dimensional tolerances of the frame 20 can be absorbed, and the manufacturing requirements of the tray base plate 10 and the frame 20 can be reduced by utilizing the properties that the tray base plate 10 has good flatness and the adhesive can absorb tolerances. In addition, when conventionally welding the tray base plate 10 and the frame 20, the tray base plate 10 is prone to deformation during welding, which increases the dimensional requirements of the battery core 201 during the subsequent assembly of the battery pack 200 and affects the assembly efficiency of the battery pack 200. In this invention, by bonding and connecting the tray base plate 10 and the frame 20, welding the tray base plate 10 and the frame 20 is avoided, deformation of the tray base plate 10 can be prevented, the dimensional requirements of the battery core 201 during subsequent assembly of the battery pack 200 can be reduced, and the assembly efficiency of the battery pack 200 can be improved.

[0077] In some embodiments of the present invention, the tray bottom plate 10 is constructed as an integrally molded product, and the tray bottom plate 10 is press-molded from a lightweight composite material. During press molding, the resin melts, flows, and hardens, after which the tray bottom plate 10 forms good airtightness. Furthermore, molding using a mold ensures good flatness and dimensional accuracy of the tray bottom plate 10, thereby guaranteeing the sealing function of the tray bottom plate 10.

[0078] In some embodiments of the present application, the frame 20 is constructed as a metal component, and the frame 20 may be made of aluminum, or the frame 20 may be made of steel, but the present application is not limited to these, and the frame 20 may be made of other metal materials that perform the same function as steel, for example, the frame 20 may be made of steel, the frame 20 may be formed by roll-rolling steel, or the frame 20 may be formed by extruding steel. By making the frame 20 a metal component, the load-bearing capacity of the frame 20 can be improved and the risk of deformation of the frame 20 can be reduced.

[0079] In some embodiments of the present invention, as shown in Figures 5 and 6, a lifting lug structure 30 is connected to a frame 20, mounting holes are provided in the lifting lug structure 30, and the lifting lug structure 30 is attached to a vehicle 2000 by fasteners (e.g., bolts), thereby achieving the objective of attaching a battery pack 200 to the vehicle 2000.

[0080] As shown in Figures 1 to 11, the battery pack 200 according to the embodiment of the present application includes a battery core 201, a battery tray 100, and a lid 40. The battery tray 100 is the battery tray 100 in the above embodiment, and the battery tray 100 has a mounting groove 111, the battery core 201 is placed in the mounting groove 111, and the lid 40 and the tray bottom plate 10 together define a mounting cavity 41 on which the battery core 201 is placed, and the lid 40 is connected to the frame 20. Furthermore, the lid 40 is fitted over the open end of the mounting groove 111 so as to define the mounting cavity 41, the extension portion 12 is interposed between the lid 40 and the frame 20, and the lid 40, the tray bottom plate 10 and the frame 20 are assembled by bolts passing through the lid 40, the extension portion 12 and the frame 20. Furthermore, a sealing member 203 (e.g., a sealing ring) is interposed between the extended portion 12 and the lid 40, and the sealing member 203 can seal the mounting cavity 41, defining a sealed insulating cavity (i.e., mounting cavity 41) between the lid 40 and the tray bottom plate 10, and after the battery core 201 is placed in the mounting cavity 41, the battery core 201 and the frame 20 can be completely isolated, the battery core 201 is in a completely insulated environment, and the battery pack 200 is free from the risk of electrical leakage.

[0081] In some embodiments of the present invention, as shown in Figure 1, the battery pack 200 may further include a retaining plate 202, which is configured as a closed annular structure, and the lid 40, sealing member 203 and extension 12 are interposed between the retaining plate 202 and the frame 20, and bolts can be passed through the retaining plate 202, lid 40, extension 12 and frame 20 to assemble the retaining plate 202, lid 40, tray bottom plate 10 and frame 20, and the retaining plate 202 can uniformly press the entire sealing member 203, ensuring secure sealing of the mounting cavity 41.

[0082] As shown in Figure 14, the vehicle 2000 according to the embodiment of the present invention includes the battery pack 200 of the above embodiment, which is attached to the vehicle 2000 and supplies electrical energy to the vehicle 2000, the frame 20 of the battery pack 200 supporting most of the weight of the battery core 201, and the tray bottom plate 10 supporting only a small portion of the weight of the battery core 201, the tray bottom plate 10 mainly plays the role of sealing, and the tray bottom plate 10 can be manufactured from a lightweight composite material, which is advantageous for lightweight design and cost reduction of the battery tray 100, battery pack 200 and vehicle 2000, and after the tray bottom plate 10 and frame 20 are assembled, there is no risk of sealing defects of the battery tray 100 due to welding, there is no need to grind the weld seams and perform airtightness inspection of the battery tray 100, and the production efficiency of the battery tray 100 and vehicle 2000 is improved. Furthermore, the tray bottom plate 10, manufactured from composite materials, has excellent electrical insulation properties. In the event of a serious bottoming-out accident involving the vehicle 2000, the battery pack 200 will not experience high-voltage risks such as arc discharge, thereby improving the safety of the vehicle 2000.

[0083] In this specification, any reference to terms such as “one embodiment,” “several embodiments,” “exemplary embodiment,” “example,” “specific example,” or “several examples” means that the specific features, structures, materials, or properties described in combination with such embodiment or example are included in at least one embodiment or example of this application. In this specification, exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described may be appropriately combined in any one or more embodiments or examples.

[0084] Although embodiments of the present application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and objectives of the present application, and that the scope of the present application is limited by the claims and their equivalents.

Claims

1. An edge beam (23) for a battery tray (100) having a mounting groove (111) for mounting a battery core (201), Including an edge beam body (231), the edge beam body (231) defines a cavity (2311), the edge beam body (231) has a partition (232), the partition (232) is located within the cavity (2311), and the partition (232) is connected between the top wall (233) and the bottom wall (234) of the cavity (2311), thereby dividing the cavity (2311) into a first subcavity ( The first sub-cavity (2351) and the second sub-cavity (2352) are separated, and the first sub-cavity (2351) and the second sub-cavity (2352) are arranged sequentially in the first direction of the edge beam (23), the cross-sectional area of ​​the first sub-cavity (2351) is S1, the cross-sectional area of ​​the second sub-cavity (2352) is S2, and the condition 0.8 < S1 / S2 < 1 is satisfied, and the first direction is the direction away from the previously described groove (111). The partition (232) is connected at an angle between the top wall (233) and the bottom wall (234) of the cavity (2311), The edge beam (23) for the battery tray (100) is characterized in that, in the direction from the upper end to the lower end of the edge beam (23), the partition portion (232) is inclined away from the aforementioned groove (111).

2. The edge beam (23) for a battery tray (100) according to claim 1, characterized in that, in the first direction of the edge beam (23), the first subcavity (2351) is located between the second subcavity (2352) and the aforementioned groove (111).

3. The edge beam (23) for the battery tray (100) according to claim 1, characterized in that the cross-sectional shape of the first subcavity (2351) and the cross-sectional shape of the second subcavity (2352) are both triangular or trapezoidal.

4. The edge beam (23) for the battery tray (100) according to claim 1 is characterized in that the edge beam (23) is formed as an integrally molded product.

5. The edge beam (23) for a battery tray (100) according to claim 1, characterized in that, in the width direction of the edge beam (23), the cavity (2311) has a first side wall (236) provided away from the aforementioned groove (111), the first side wall (236) is connected between the top wall (233) and the bottom wall (234) of the cavity (2311), and the first side wall (236) is connected to the partition portion (232).

6. The edge beam (23) for a battery tray (100) according to claim 5, characterized in that the lower end of the first side wall (236) is connected to a first connecting portion (238) that extends toward the cavity (2311), the first connecting portion (238) is located on the side of the bottom wall (234) of the cavity (2311) toward the top wall (233) of the cavity (2311), the first side wall (236) is connected to the bottom wall (234) and the partition portion (232) of the cavity (2311) via the first connecting portion (238), and the first connecting portion (238) is fixedly connected to the bottom wall (234) of the cavity (2311).

7. The edge beam (23) for a battery tray (100) according to claim 1, characterized in that the cavity (2311) has a second side wall (237) adjacent to the aforementioned groove (111), the second side wall (237) is connected between the top wall (233) and bottom wall (234) of the cavity (2311), and the second side wall (237) is connected to the partition portion (232).

8. An edge beam (23) for a battery tray (100) according to claim 7, characterized in that a second connecting portion (239) extending toward the cavity (2311) is connected to the upper end of the second side wall (237), the second connecting portion (239) is located on the side of the top wall (233) of the cavity (2311) toward the bottom wall (234) of the cavity (2311), the second side wall (237) is connected to the top wall (233) and the partition portion (232) of the cavity (2311) via the second connecting portion (239), and the second connecting portion (239) is fixedly connected to the top wall (233) of the cavity (2311).

9. The edge beam (23) for a battery tray (100) according to claim 7, wherein the edge beam (23) further includes a support portion (22), the support portion (22) is provided on the side of the edge beam body (231) that is close to the aforementioned mounting groove (111), and the support portion (22) supports the battery core (201).

10. The edge beam (23) for a battery tray (100) according to claim 9, characterized in that the lower end of the second side wall (237) is connected to a support portion (22) extending toward the aforementioned groove (111), and the second side wall (237) is connected to the bottom wall (234) of the cavity (2311) via the support portion (22).

11. The edge beam (23) for a battery tray (100) according to claim 7, characterized in that the second side wall (237) is connected at an inclination between the top wall (233) and bottom wall (234) of the cavity (2311), and in the direction from the upper end to the lower end of the edge beam (23), the second side wall (237) is inclined in a direction approaching the aforementioned groove (111).

12. The edge beam (23) for a battery tray (100) according to claim 9, characterized in that, in the width direction of the edge beam (23), the bottom wall (234) of the cavity (2311) has a structural reinforcing portion (2341) that extends to below the support portion (22), and the structural reinforcing portion (2341) is connected to the end of the support portion (22) that is close to the aforementioned groove (111).

13. The edge beam (23) for a battery tray (100) according to claim 12, characterized in that the structural reinforcing portion (2341) is provided with a boss that protrudes toward the support portion (22), and the boss is connected to the support portion (22).

14. In the width direction of the edge beam (23), the cavity (2311) has a first side wall (236) provided away from the groove (111) described above, and the first side wall (236) is connected between the top wall (233) and the bottom wall (234) of the cavity (2311). The edge beam (23) for a battery tray (100) according to claim 1, characterized in that the cavity (2311) has a second side wall (237) adjacent to the aforementioned groove (111), the second side wall (237) is connected between the top wall (233) and bottom wall (234) of the cavity (2311), the top wall (233) of the cavity (2311), the bottom wall (234) of the cavity (2311), the first side wall (236) and the second side wall (237) together define the cavity (2311), and the bottom wall (234) of the cavity (2311) extends toward the aforementioned groove (111) to form a support portion (22) that supports the battery core (201).

15. A battery tray (100) characterized by including an edge beam (23) for a battery tray (100) as described in any one of claims 1 to 14.

16. A battery tray (100) including a tray base plate (10) and a frame (20), The tray bottom plate (10) includes a bottom plate body (11) and an extended portion (12), the bottom plate body (11) defines a mounting groove (111) for placing the battery core (201), and the extended portion (12) extends along the circumferential edge of the bottom plate body (11). The battery tray (100) according to 15, characterized in that the frame (20) includes side beams, a front beam (24), and a rear beam (25), at least one of the side beams, the front beam (24), and the rear beam (25) is the edge beam (23), the side beams, the front beam (24), and the rear beam (25) are connected to form a mounting space (21), the bottom plate body (11) is attached to the mounting space (21), and in the height direction of the battery tray (100), the extending portion (12) is located above the frame (20) and is provided on the frame (20), and at least one of the side beams, the front beam (24), and the rear beam (25) has a support portion (22) that extends toward the mounting space (21), the support portion (22) supports the tray bottom plate (10).

17. A battery pack (200) comprising a battery core (201) and a battery tray (100) as described in claim 15, wherein the battery tray (100) has a mounting groove (111), and the battery core (201) is placed in the mounting groove (111).

18. A vehicle (2000) characterized by including the battery pack (200) described in claim 17.

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