Beam assembly, tray and battery pack

Abstract

The embodiment of the application provides a beam assembly, a tray and a battery pack, and relates to the field of battery pack technology. The beam assembly provided by the application comprises a connecting piece, a beam body and a foaming piece. The beam body has a first cavity arranged along the length direction of the beam body. The beam body has a support plate, and the support plate and the first part of the beam body jointly enclose the first cavity. The support plate is provided with a first guide, and the first guide is configured to guide the foaming piece in a compressed state to cover the support plate, so that the foaming piece in a foaming state fills the first cavity. By filling the foaming piece in the first cavity, the structural strength of the beam body can be significantly improved, and the safety of the battery pack is greatly improved. By arranging the first guide, the foaming piece in the compressed state can better cover the support plate, so that the foaming piece in the foaming state can completely fill the first cavity, and the structural stability and the structural strength of the beam body are further improved.

Description

Technical Field

[0001] This application relates to battery pack technology, and more particularly to a beam assembly, a tray, and a battery pack. Background Technology

[0002] In recent years, the electric vehicle industry has developed rapidly. As an important component of electric vehicles, the battery pack not only affects the performance and safety of electric vehicles, but also directly impacts their market competitiveness and sustainable development.

[0003] The battery pack includes a tray, cell modules, and a beam assembly. The beam assembly is housed within the tray, and the tray and beam assembly together enclose a space for accommodating the cell modules. The beam assembly improves the rigidity of the battery pack tray and absorbs energy when the battery pack is subjected to external impact loads, thereby protecting the cell modules.

[0004] However, existing crossbeam assemblies suffer from insufficient strength and poor protection of the battery cell modules. Utility Model Content

[0005] In view of this, this application provides a beam assembly, a tray, and a battery pack, aiming to improve the strength of the beam assembly and thus improve the safety of the battery pack.

[0006] To achieve the above objectives, this application provides a crossbeam assembly, a tray, and a battery pack, employing the following technical solution:

[0007] In a first aspect, this application provides a beam assembly, comprising:

[0008] Connectors;

[0009] A crossbeam body for connecting to the edge of a tray via the connector, the crossbeam body having a first chamber disposed along a first direction, the first direction being parallel to the length direction of the crossbeam body;

[0010] The crossbeam body has a support plate, and the support plate and the first part of the crossbeam body together form the first cavity;

[0011] Foamed parts;

[0012] The support plate is provided with a first guide, which is configured to guide the compressed foam to cover the support plate, thereby causing the foam to fill the first chamber.

[0013] In one possible implementation, the beam assembly provided in this application has a first guide member consisting of a plurality of first grooves formed on the support plate, wherein the length direction of the first grooves is consistent with the first direction, and the plurality of first grooves are arranged along a second direction.

[0014] The second direction is the thickness direction of the beam body, and the first direction is perpendicular to the second direction.

[0015] In one possible implementation, the beam assembly provided in this application has a partition plate disposed in the first cavity;

[0016] The partition plate divides the first chamber into a first part chamber and a second part chamber arranged vertically along a third direction.

[0017] The partition plate has a through hole, through which the first part of the chamber and the second part of the chamber are connected;

[0018] The third direction is perpendicular to the first direction; the third direction is the height direction of the beam body.

[0019] In one possible implementation, the beam assembly provided in this application has a plurality of glue injection holes on the beam body, and the glue injection holes are spaced apart along the first direction.

[0020] The injection hole is connected to the first chamber.

[0021] In one possible implementation, the crossbeam assembly provided in this application has the glue injection hole disposed on the top surface of the crossbeam body;

[0022] The injection hole is connected to the first part of the chamber;

[0023] In the third direction, at least one of the injection holes is opposite to the through hole.

[0024] In one possible implementation, the beam assembly provided in this application has a second guide on the partition plate. The second guide is a plurality of second grooves formed on the partition plate. The length direction of the second grooves is consistent with the first direction, and the plurality of second grooves are arranged along the second direction.

[0025] In one possible implementation, the beam assembly provided in this application, wherein the support plate and the second part of the beam body together form a second chamber;

[0026] The second chamber is used to accommodate at least the battery pack wiring;

[0027] The second chamber and the first chamber are arranged in a third-direction orientation.

[0028] In one possible implementation, the beam assembly provided in this application has two connectors, which are respectively disposed at both ends of the beam body, and the beam body is used to be welded to the frame through the connectors.

[0029] The projection of the crossbeam body toward the connector is located inside the connector.

[0030] Secondly, this application provides a tray including a frame and the aforementioned beam assembly, the beam assembly being connected to the frame.

[0031] Thirdly, this application provides a battery pack, including a cell module and the aforementioned tray, wherein the cell module is disposed within the tray.

[0032] The crossbeam assembly, tray, and battery pack provided in this application include a crossbeam assembly comprising a connector, a crossbeam body, and a foaming component. The crossbeam body is connected to the edge of the tray via the connector. The crossbeam body has a first chamber disposed along a first direction, parallel to the length direction of the crossbeam body. A support plate is also present within the crossbeam body, forming the first chamber together with a portion of the crossbeam body. A first guide is disposed on the support plate, configured to guide the compressed foaming component to cover the support plate, thereby filling the first chamber with the foamed component. By filling the first chamber of the crossbeam body with foaming component, the structural strength of the crossbeam body can be significantly improved. When the crossbeam body is subjected to impact loads, the foaming component can more effectively disperse and absorb the impact loads. This provides comprehensive buffer protection for the battery cell module, reducing the possibility of damage to the battery cell module in a collision and greatly improving the safety of the battery pack. By setting the first guide, the compressed foam component can better cover the support plate, ensuring that the foam component can completely fill the first chamber, thereby further improving the structural stability and strength of the beam body.

[0033] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the technical solutions provided by this application, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0034] The specific embodiments of this application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of this application, and this application is not limited to the specific embodiments described below.

[0035] Figure 1 A partial structural schematic diagram of the battery pack provided in this application;

[0036] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle;

[0037] Figure 3 A partial structural schematic diagram of the beam assembly provided in this application;

[0038] Figure 4 This is a schematic diagram of the internal structure of the beam body provided in this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 10. Frame; 100. Connector; 200. Crossbeam body; 201. Glue injection hole; 300. First chamber; 310. First partial chamber; 320. Second partial chamber; 400. Support plate; 500. First guide; 600. Partition plate; 601. Through hole; 700. Second guide; 800. Second chamber.

[0041] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0043] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specified precisely.

[0046] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0047] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0048] In recent years, the electric vehicle industry has developed rapidly. As a crucial component of electric vehicles, the battery pack not only affects their performance and safety but also directly impacts their market competitiveness and sustainable development. Lithium-ion batteries, as a new type of rechargeable battery, possess advantages such as high energy and power density, high operating voltage, light weight, small size, long cycle life, good safety, and environmental friendliness. They have broad application prospects in portable appliances, power tools, large-scale energy storage, and electric vehicle power supplies.

[0049] Traditional power battery packs are typically square, comprising a tray, cell modules, and a crossbeam assembly. The crossbeam assembly is housed within the tray, and together they enclose a space for housing the cell modules. The crossbeam assembly enhances the rigidity of the battery pack tray and absorbs energy when the battery pack is subjected to external impact loads, thus protecting the cell modules. However, if the crossbeam assembly is insufficiently strong, the battery pack is highly susceptible to damage to the stability of the cell modules during impacts and compressions, thereby compromising the safety of the battery pack and posing a significant safety hazard.

[0050] Based on the above-mentioned technical problems, this application provides a crossbeam assembly, a tray, and a battery pack. In this technical solution, the crossbeam assembly includes a connector, a crossbeam body, and a foaming component. The crossbeam body is connected to the edge of the tray through the connector. The crossbeam body has a first chamber arranged along a first direction, which is parallel to the length direction of the crossbeam body. The crossbeam body has a support plate, which together with a first part of the crossbeam body forms the first chamber. A first guide is provided on the support plate, which is configured to guide the compressed foaming component to cover the support plate, thereby filling the first chamber with the foamed component.

[0051] By filling the first cavity of the crossbeam body with foam, the structural strength of the crossbeam body can be significantly improved. When the crossbeam body is subjected to impact loads, the foam can more effectively disperse and absorb the impact loads. This provides comprehensive buffer protection for the battery cell module, reducing the possibility of damage to the battery cell module in a collision and greatly improving the safety of the battery pack. Specifically, by setting a first guide, the compressed foam can better cover the support plate, ensuring that the foam completely fills the first cavity, further improving the structural stability and strength of the crossbeam body.

[0052] It should be noted that, Figures 1 to 4 The diagram shows a simplified representation of the components in the beam assembly, tray, and battery pack. The specific structures of the remaining components in the beam assembly, tray, and battery pack are not limited to these details. Figures 1 to 4 of examples.

[0053] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0054] Reference Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of this application provides a beam assembly comprising:

[0055] Connector 100.

[0056] The beam body 200 is used to connect to the pallet frame 10 via the connector 100. The beam body 200 has a first chamber 300 arranged along a first direction, which is parallel to the length direction of the beam body 200.

[0057] The crossbeam body 200 has a support plate 400 inside, and the support plate 400 and the first part of the crossbeam body 200 together form the first chamber 300.

[0058] Foamed components (not shown in the figure).

[0059] A first guide 500 is provided on the support plate 400. The first guide 500 is configured to guide the compressed foam to cover the support plate 400, thereby causing the foam to fill the first chamber 300.

[0060] It should be noted that the tray in the above embodiments is a tray for a battery pack, which typically includes a base plate and a frame 10 disposed on the base plate. The base plate and the frame 10 enclose a space for accommodating the battery cell module. This application does not limit the specific structure of the tray.

[0061] In the above embodiment, by filling the first chamber 300 of the crossbeam body 200 with foam, the structural strength of the crossbeam body 200 can be significantly improved. When the crossbeam body 200 is subjected to a collision load, the foam can more effectively disperse and absorb the impact load. This provides comprehensive buffer protection for the battery cell module, reduces the possibility of damage to the battery cell module in a collision, and greatly improves the safety of the battery pack.

[0062] By setting the first guide 500, the compressed foam component can better cover the support plate 400, so as to ensure that the foam component can completely fill the first chamber 300, thereby further improving the structural stability and structural strength of the beam body 200.

[0063] Here, the foaming component is a physical or chemical foaming agent. The foaming component typically has both a compressed and a foamed state. The volume of the compressed foaming component is smaller than that of the foamed component. For example, the foaming component is expanded polystyrene foam. The compressed expanded polystyrene foam is in a fluid state. The first guide 500 can more easily guide the flow of the foaming component. The expanded polystyrene foam can expand and foam upon contact with air, thereby completely filling the first chamber 300 and improving the rigidity of the beam body 200. This application does not limit the specific structure of the foaming component.

[0064] Furthermore, it is understandable that by providing a first guide 500 on the support plate 400, the first guide 500 can effectively increase the support area of ​​the foam, thereby making the foam more stable.

[0065] In one possible implementation, the first guide 500 is a plurality of first grooves formed on the support plate 400, the length direction of the first grooves is consistent with the first direction, and the plurality of first grooves are arranged along the second direction.

[0066] The second direction is the thickness direction of the beam body 200, and the first direction is perpendicular to the second direction.

[0067] Reference Figure 3 As shown, the first direction is the direction of the X arrow, and the second direction is the direction of the Y arrow. In three-dimensional space, the directions of the X, Y, and Z arrows are perpendicular to each other.

[0068] In the above embodiment, the first guide 500 is designed as multiple first grooves formed on the support plate 400 with its length direction aligned with the first direction and arranged along the thickness direction of the crossbeam body 200. This allows for more precise guidance of the compressed foam component to cover the support plate 400. The multiple regularly arranged first grooves enable the foam component to flow and distribute in a preset, orderly manner when filling the first chamber 300, thereby ensuring a more uniform distribution of the foam component within the crossbeam body 200 and avoiding localized underfilling or overfilling. When the battery pack is subjected to external impact loads, the foam component can more stably and effectively absorb energy, providing more uniform and reliable buffer protection for the cell module, further enhancing the overall safety and stability of the battery pack.

[0069] Multiple first grooves are arranged along the thickness direction of the crossbeam body 200, allowing the foam to better adapt to the structural characteristics of the crossbeam body 200 during the filling process. This enhances the adaptability of the crossbeam assembly to various complex stress conditions and better meets the protection requirements of the battery pack against external forces of different directions and intensities during actual use.

[0070] Furthermore, the process of creating multiple first grooves is relatively simple and mature, and this structure can be easily manufactured through methods such as mold casting or machining. This guide component composed of multiple first grooves is easier to process and shape, reducing the difficulty and cost of the manufacturing process and improving production efficiency.

[0071] In one possible implementation, the first guide 500 can also be a capillary tube, which exhibits capillary behavior after contacting the foaming component, thereby guiding the flow of the foaming component.

[0072] In one possible implementation, please refer to Figure 3 and Figure 4 As shown, a partition plate 600 is provided inside the first chamber 300.

[0073] The partition plate 600 divides the first chamber 300 into a first part chamber 310 and a second part chamber 320 arranged vertically along a third direction.

[0074] The partition plate 600 has a through hole 601, through which the first chamber 310 and the second chamber 320 are connected.

[0075] The third direction is perpendicular to the first direction.

[0076] The third direction is the height direction of the beam body at 200.

[0077] By providing a partition plate 600 within the first chamber 300, the originally single first chamber 300 is divided into three chambers along a third direction ( Figure 3 The first chamber 310 and the second chamber 320, positioned vertically (in the direction of the Z-arrow), achieve a reasonable partitioning of the space within the first chamber 300. When the battery pack is impacted, each area within the first chamber 300 can provide appropriate buffering protection for the cell modules, improving the effectiveness and accuracy of the protection. The partition plate 600 has through holes 601, connecting the first chamber 310 and the second chamber 320. During the actual filling of the foaming component, the foam can flow and distribute between the two chambers through the through holes 601, forming an interconnected and synergistic buffering system. The impact force can be more evenly distributed to different parts of the entire beam assembly. The combined effect of the foaming components within the first chamber 310 and the second chamber 320 absorbs and buffers energy, further enhancing the protection of the cell modules and improving the overall safety and reliability of the battery pack.

[0078] Here, multiple partition plates 600 can be arranged side by side at intervals to achieve more precise partitioning. The partition plates 600 can also further improve the impact resistance of the crossbeam assembly in the second direction. The number of partition plates 600 is not limited in this embodiment.

[0079] In one possible implementation, the crossbeam body 200 is provided with a plurality of glue injection holes 201, which are arranged at intervals along a first direction.

[0080] The glue injection hole 201 is connected to the first chamber 300.

[0081] In the above embodiment, by providing multiple injection holes 201 on the crossbeam body 200, the foamed component can be more evenly distributed across various parts of the crossbeam body 200 when filling the first chamber 300. The injection holes 201 communicate with the first chamber 300, allowing the foamed component to enter the first chamber 300 during the foaming process, thus strengthening the connection between the support plate 400 and the crossbeam body 200. The injection holes 201 ensure that the foamed component fully fills the first chamber 300 and also provide a channel for filling, making it easier for the foamed component to enter the first chamber 300. This increases the crossbeam assembly's resistance to deformation, helping to protect the battery cell module from damage.

[0082] In one possible implementation, the glue injection hole 201 is provided on the top surface of the crossbeam body 200.

[0083] The glue injection hole 201 is connected to the first part of the chamber 310.

[0084] On the third side, at least one injection hole 201 is opposite to the through hole 601.

[0085] In the above embodiment, the glue injection hole 201 is provided on the top surface of the crossbeam body 200 and communicates with the first part of the cavity 310, so that the foam can be filled into the crossbeam body 200 more evenly, increasing the cross-sectional area and moment of inertia of the crossbeam body 200, thereby improving the load-bearing capacity of the crossbeam body 200.

[0086] Furthermore, by setting the injection hole 201 on the top surface of the crossbeam body 200, with at least one injection hole 201 facing the through hole 601, during the injection of the foam, the foam can be injected into the second cavity in sequence through the injection hole 201 and the through hole 601, so that the foam is filled from bottom to top, which helps to improve the filling integrity of the foam.

[0087] The injection hole 201 can also be used as a positioning hole when installing battery cell modules or other special components, thereby improving the practicality of the crossbeam assembly and simplifying the assembly process and improving assembly efficiency.

[0088] In one possible implementation, a second guide 700 is provided on the partition plate 600. The second guide 700 is a plurality of second grooves formed on the partition plate 600. The length direction of the second grooves is consistent with the first direction, and the plurality of second grooves are arranged along the second direction.

[0089] In the above embodiment, the second groove serves as a second guide 700, which can precisely guide the flow direction of the foam on the partition plate 600. This helps ensure that the foam fills each area of ​​the first chamber 300 according to design requirements, avoiding uneven distribution or accumulation of material, thereby improving the overall performance and quality of the beam assembly.

[0090] The second groove helps ensure the uniformity of the foam during filling. By guiding the flow path of the foam, turbulence and irregular flow during the filling process can be reduced.

[0091] Here, by setting the first groove and the second groove, the support area of ​​the foamed part can be increased. The foamed part has a certain degree of stickiness after foaming. The first groove and the second groove can increase the connection area between the foamed part and the inner wall of the first chamber 300, thereby improving the stability of the foamed part.

[0092] In one possible implementation, in order to further improve the overall rigidity of the beam assembly, the beam body 200, the support plate 400, and the segment plate are integrally formed.

[0093] In one possible implementation, the support plate 400 and the second part of the crossbeam body 200 together form a second chamber 800.

[0094] The second chamber 800 is used to house at least the wiring of the battery pack.

[0095] The second chamber 800 and the first chamber 300 are arranged in a third-direction orientation.

[0096] In the above embodiment, the second chamber 800, formed by the support plate 400 and the second part of the crossbeam body 200, provides a dedicated space for the battery pack's wiring. In an electric vehicle battery pack, the wiring is numerous and complex, requiring a reasonable layout to avoid clutter and interference. The second chamber 800 can centrally place the wiring, making its routing clearer and more orderly, facilitating installation and maintenance personnel, reducing the occurrence of wire tangling and crossing, and lowering the risk of short circuits, poor contact, and other malfunctions caused by wiring issues.

[0097] By housing the wiring harness within the second chamber 800, it is possible to prevent the harness from shifting or moving freely within the battery pack, thus enhancing its stability and reliability. Especially during vehicle operation, vibrations and bumps provide some protection within the second chamber 800, reducing the likelihood of damage from external forces and helping to maintain the battery pack's normal circuit connections and electrical performance.

[0098] The second chamber 800 and the first chamber 300 are arranged in a third-order orientation, making full use of the limited space inside the crossbeam body 200. Without adding excessive volume or weight, this rational space planning allows for more efficient use of the battery pack's internal space. It not only provides suitable placement for wiring but also ensures the proper layout of other components, contributing to a more compact overall battery pack design.

[0099] In addition, the support plate 400, as part of the crossbeam assembly, together with the crossbeam body 200, forms the first chamber 300 and the second chamber 800, increasing the overall rigidity and strength of the crossbeam assembly.

[0100] In one possible implementation, please continue to refer to Figure 1 and Figure 2 As shown, there are two connectors 100, which are respectively located at both ends of the crossbeam body 200. The crossbeam body 200 is used to weld to the frame 10 through the connectors 100.

[0101] The projection of the crossbeam body 200 toward the connector 100 is located inside the connector 100.

[0102] Optionally, the connector 100 can be a plate-shaped connector 100, and the projection of the beam body 200 toward the connector 100 is located inside the connector 100. The cross-sectional area of ​​the connector 100 is larger than the cross-sectional area of ​​the beam body 200. First, the beam body 200 is welded to the frame 10 through the connector 100, which can avoid damaging the structural integrity of the beam body 200 itself and reduce stress concentration. In addition, the connector 100 has a large connection area with the frame 10, which can improve the connection stability with the frame 10 and also facilitate processing. In a specific implementation, in the second direction, the opposite sides of the connector 100 are welded to the frame 10, and the weld is parallel to the third direction, further improving the connection stability.

[0103] In one possible implementation, this application also provides a tray, including a frame 10 and the aforementioned beam assembly, the beam assembly being connected to the frame 10. The specific structure of the beam assembly has been described above and will not be repeated here; this tray possesses all the technical effects of the aforementioned beam assembly.

[0104] This application also provides a battery pack, including cell modules and the aforementioned tray, wherein the cell modules are disposed within the tray, and the number of cell modules is not limited. By using the aforementioned tray, the safety of the battery pack can be improved.

[0105] The implementation principle of a crossbeam assembly, tray, and battery pack according to an embodiment of this application is as follows: The crossbeam assembly includes a connector 100, a crossbeam body 200, and a foam component. The crossbeam body 200 is connected to the edge 10 of the tray via the connector 100. The crossbeam body 200 has a first chamber 300 arranged along a first direction, which is parallel to the length direction of the crossbeam body 200. The crossbeam body 200 has a support plate 400, which, together with the first part of the crossbeam body 200, forms the first chamber 300. A first guide 500 is provided on the support plate 400, which is configured to guide the compressed foam component to cover the support plate 400, thereby filling the first chamber 300 with the foam component. By filling the first chamber 300 of the crossbeam body 200 with a foam component, the structural strength of the crossbeam body 200 can be significantly improved. When the crossbeam body 200 is subjected to a collision load, the foam component can more effectively disperse and absorb the impact load. This provides comprehensive buffer protection for the battery cell modules, reducing the possibility of damage to the battery cell modules in collisions and greatly improving the safety of the battery pack. Specifically, by setting the first guide 500, the compressed foamed component can better cover the support plate 400, ensuring that the foamed component can completely fill the first chamber 300, further improving the structural stability and strength of the crossbeam body 200.

[0106] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein.

[0107] The embodiments in this application are intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0108] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A beam assembly, characterized in that, include: Connector (100); A beam body (200) is used to connect to the edge (10) of the tray via the connector (100), and the beam body (200) has a first chamber (300) arranged along a first direction, which is parallel to the length direction of the beam body (200); The crossbeam body (200) has a support plate (400) inside, and the support plate (400) and the first part of the crossbeam body (200) together form the first chamber (300). Foamed parts; The support plate (400) is provided with a first guide (500), which is configured to guide the foamed part in a compressed state to cover the support plate (400), thereby causing the foamed part in a foamed state to fill the first chamber (300).

2. The beam assembly according to claim 1, characterized in that, The first guide (500) is a plurality of first grooves formed on the support plate (400), the length direction of the first groove is consistent with the first direction, and the plurality of first grooves are arranged along the second direction; The second direction is the thickness direction of the beam body (200), and the first direction is perpendicular to the second direction.

3. The beam assembly according to claim 2, characterized in that, A partition plate (600) is provided inside the first chamber (300); The partition plate (600) divides the first chamber (300) into a first partial chamber (310) and a second partial chamber (320) arranged vertically along a third direction. The partition plate (600) has a through hole (601), through which the first partial chamber (310) and the second partial chamber (320) are connected; The third direction is perpendicular to the first direction; the third direction is the height direction of the beam body (200).

4. The beam assembly according to claim 3, characterized in that, The crossbeam body (200) is provided with a plurality of glue injection holes (201), and the glue injection holes (201) are arranged at intervals along the first direction; The glue injection hole (201) is connected to the first chamber (300).

5. The beam assembly according to claim 4, characterized in that, The glue injection hole (201) is provided on the top surface of the crossbeam body (200); The glue injection hole (201) is connected to the first partial chamber (310); In the third direction, at least one of the injection holes (201) is opposite to the through hole (601).

6. The beam assembly according to claim 3, characterized in that, The partition plate (600) is provided with a second guide (700), which is a plurality of second grooves formed on the partition plate (600). The length direction of the second groove is consistent with the first direction, and the plurality of second grooves are arranged along the second direction.

7. The beam assembly according to any one of claims 1-6, characterized in that, The support plate (400) and the second part of the beam body (200) together form the second chamber (800). The second chamber (800) is used to accommodate at least the wiring of the battery pack; The second chamber (800) and the first chamber (300) are arranged in a third-direction orientation.

8. The beam assembly according to any one of claims 1-6, characterized in that, Two connectors (100) are provided, and the two connectors (100) are respectively provided at both ends of the crossbeam body (200). The crossbeam body (200) is used to weld to the frame (10) through the connectors (100); The projection of the beam body (200) toward the connector (100) is located inside the connector (100).

9. A tray, characterized in that, It includes a frame (10) and a beam assembly as described in any one of claims 1-8, the beam assembly being connected to the frame (10).

10. A battery pack, characterized in that, It includes a battery cell module and the tray as described in claim 9, wherein the battery cell module is disposed within the tray.

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