Embedded integrally-reinforced cross beam and frame structure for battery pack

Abstract

The utility model relates to an embedded integrated reinforced battery pack cross beam and frame structure, the structure comprises a frame and a cross beam, the frame and the cross beam are fixedly connected through an embedded integrated reinforced structure, the embedded integrated reinforced structure comprises a cross beam connecting part and two frame connecting parts vertically connected with the cross beam connecting part, the cross section of the cross beam connecting part is smaller than that of the cross beam, so that the cross beam connecting part is embedded in the cross beam. According to the utility model, direct welding connection of the cross beam and the frame is avoided by arranging the embedded integrated reinforcing structure, so that the connection strength of the cross beam and the frame is improved, and the risk of vibration failure caused by direct welding of the frame and the cross beam is reduced.

Description

Technical Field

[0001] This utility model relates to the field of power battery pack design technology for new energy vehicles, and specifically provides a crossbeam and frame structure for an embedded integrated reinforced battery pack. Background Technology

[0002] my country's research and verification of the reliability and safety of power battery packs for new energy vehicles are among the world's best. The "GB 38031-2020 Safety Requirements for Power Batteries for Electric Vehicles" stipulates that after a vibration test, the battery pack should show no leakage, casing rupture, fire, or explosion. Most automakers also require that after the battery pack vibration test, there should be no casing rupture upon disassembly.

[0003] Whether using aluminum or steel frame structures, the crossbeams play a crucial role in enhancing the overall rigidity and strength of the enclosure. Among enclosure failures, weld failures between the crossbeams and the frame account for a significant proportion. These weld failures are caused by two main factors: firstly, the quality of the welds; and secondly, inadequate design, where stress concentration occurs at the connection point due to the transmission of force from the frame to the crossbeam during vibration, resulting in weld failure.

[0004] Utility model patent application CN202020515021.8 discloses a battery tray and battery pack, in which the triangular bracing reinforcement of the crossbeam and frame is made of aluminum and is used for aluminum profile housings; its application to steel housings is not described. Furthermore, utility model patent application CN202122706386.6 discloses a housing and battery pack, in which the crossbeam and frame are reinforced with bent parts, resulting in weaker reinforcement.

[0005] Strengthening the crossbeams and frame structure of the battery pack, reducing the risk of welding failure of the crossbeams and frame, and improving the safety and reliability of the battery pack have become increasingly urgent technical problems to be solved. Utility Model Content

[0006] To address the aforementioned issues, this utility model provides an embedded integrated reinforced battery pack beam and frame structure, which is low in cost and improves the reliability and safety of the battery pack.

[0007] The purpose of this utility model is to provide an embedded integrated reinforced battery pack crossbeam and frame structure, including a frame and a crossbeam, which are fixedly connected by an embedded integrated reinforcing structure. The embedded integrated reinforcing structure includes a crossbeam connecting portion and two frame connecting portions perpendicularly connected to the crossbeam connecting portion.

[0008] The cross-section of the beam connector is smaller than the cross-section of the beam, so that the beam connector is embedded inside the beam.

[0009] Further, the embedded integrated reinforcing structure is an integrated bending piece.

[0010] Further, the beam connecting part comprises a first connecting plate, a second connecting plate and a third connecting plate, the first connecting plate, the second connecting plate and the third connecting plate are connected vertically in sequence, and the beam connecting part forms a hollow cavity perpendicular to the direction of the beam after being attached to the frame.

[0011] Further, the length and the width of the second connecting plate are both smaller than the length and the width of the cross section of the beam.

[0012] Further, the two frame connecting parts respectively comprise a fourth connecting plate and a fifth connecting plate, and the fourth connecting plate and the fifth connecting plate are respectively connected vertically to the first connecting plate and the third connecting plate.

[0013] Further, at least one first connecting hole is arranged on the first connecting plate, the third connecting plate, the fourth connecting plate and the fifth connecting plate, wherein,

[0014] The first connecting plate and the third connecting plate are attached to the inner side of the beam on one side outside the hollow cavity, and the corresponding first connecting hole is fixedly connected to the beam through a fastener;

[0015] One side of the fourth connecting plate and the fifth connecting plate is attached to the frame, and the corresponding first connecting hole is connected to the frame through a fastener.

[0016] Further, the fastener is a rivet.

[0017] Further, the embedded integrated reinforcing structure can be applied to a steel box battery pack and an aluminum profile box battery pack.

[0018] The embedded integrated reinforcing structure is used to connect the frame and the beam through riveting, avoids direct welding connection of the beam and the frame, improves the connection strength of the beam and the frame, reduces the risk of vibration failure caused by direct welding of the frame and the beam, and is convenient to assemble and disassemble when the reinforcing structure is applied.

[0019] Other features and advantages of the present application will be described in the following description, and some will become apparent from the description, or will be understood from the practice of the present application. The purpose and other advantages of the present application can be achieved and obtained by the structure indicated in the specification, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 It is a whole axonometric view of the embedded integrated reinforcing beam and frame structure for battery pack in the embodiments of the present application;

[0022] Figure 2 It is a local enlarged schematic view of the embedded integrated reinforcing structure, frame and beam cooperation state at the connection position I in the embodiments of the present application.

[0023] The various reference signs in the drawings are as follows: 1-frame; 2-beam; 3-embedded integrated reinforcing structure; 31-first connecting plate; 32-second connecting plate; 33-third connecting plate; 34-fourth connecting plate; 35-fifth connecting plate; 4-rivets. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely explain the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] As shown in Figure 1 , the present application introduces an embedded integrated reinforcing beam and frame structure for battery pack, which comprises a frame and a beam, and the frame and the beam are fixedly connected through an embedded integrated reinforcing structure. The embedded integrated reinforcing structure comprises a beam connecting part and two frame connecting parts connected perpendicularly with the beam connecting part. The cross section of the beam connecting part is smaller than the cross section of the beam, so as to embed the beam connecting part in the beam. The reinforcing structure of the present application is convenient to assemble and disassemble, and has low cost. The realized benefits are much higher than the increased cost.

[0026] Specifically as Figure 1 , 2As shown, the embedded integrated reinforcement beam and frame structure for battery pack includes a frame 1, a beam 2 and an embedded integrated reinforcement structure 3, wherein the embedded integrated reinforcement structure 3 includes a beam connecting part and a frame connecting part, the beam connecting part includes a first connecting plate 31, a second connecting plate 32 and a third connecting plate 33, the first connecting plate 31, the second connecting plate 32 and the third connecting plate 33 are connected in sequence and vertically, and the beam connecting part and the frame are pasted to form a hollow cavity. The two frame connecting parts respectively include a fourth connecting plate 34 and a fifth connecting plate 35, and the fourth connecting plate 34 and the fifth connecting plate 35 are respectively connected with the first connecting plate 31 and the third connecting plate 34 vertically. Preferably, the embedded integrated reinforcement structure is a bending piece. Further, the length and width of the first connecting plate 31 are both smaller than the length and width of the cross section of the beam, so that the first connecting plate 31 can be embedded in the beam. Further, at least one first connecting hole is arranged on the first connecting plate 31, the third connecting plate 33, the fourth connecting plate 34 and the fifth connecting plate 35, wherein one side of the first connecting plate 31 and the third connecting plate 33 outside the hollow cavity is pasted to the inside of the beam 2, and the corresponding first connecting hole is fixedly connected with the beam 2 through a fastener; one side of the fourth connecting plate 34 and the fifth connecting plate 35 is pasted to the frame 1, and the corresponding first connecting hole is connected with the frame through a fastener. As Figure 1 、 2 illustratively, two connecting holes are arranged on the first connecting plate 31, the third connecting plate 33, the fourth connecting plate 34 and the fifth connecting plate 35, but the number of connecting holes is not limited to this.

[0027] In the embodiment of the utility model, the embedded integrated reinforcement structure is a bending piece and can be used for aluminum profile box and steel box.

[0028] In the embodiment of the utility model, the fastener is a rivet 4, so that the embedded integrated reinforcement structure 3 is riveted to the frame 1 and the beam 2 respectively, and the specific installation process includes the following steps: first, the embedded integrated reinforcement structure 3 is connected to the inside of the beam 2 of the battery pack through the rivet 4; second, the combined part of the connected beam 2 and the embedded integrated reinforcement structure 3 is connected to the frame 1 of the battery pack through the rivet 4. The embedded integrated reinforcement structure is connected to the frame and the beam through riveting, which avoids the direct welding connection of the beam and the frame, thereby improving the connection strength of the beam and the frame and reducing the risk of vibration failure caused by the direct welding of the frame and the beam.

[0029] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A beam and frame structure for an in-cell integrated reinforced battery pack, characterized by, The frame and the crossbeam are fixedly connected through an embedded integrated reinforcing structure, the embedded integrated reinforcing structure comprises a crossbeam connecting part and two frame connecting parts which are connected with the crossbeam connecting part perpendicularly, wherein, The cross section of the crossbeam connecting part is smaller than the cross section of the crossbeam, so as to embed the crossbeam connecting part inside the crossbeam.

2. The beam and frame structure for the embedded integrated reinforced battery pack according to claim 1, wherein, The embedded integrated reinforcing structure is an integrated bending piece.

3. The in-cell integrated reinforced battery pack beam and frame structure of claim 2, wherein, The crossbeam connecting part comprises a first connecting plate, a second connecting plate and a third connecting plate which are connected perpendicularly in sequence, and the crossbeam connecting part forms a hollow cavity which is perpendicular to the direction of the crossbeam after being attached with the frame.

4. The in-cell integrated reinforced battery pack beam and frame structure of claim 3, wherein, The length and width of the second connecting plate are both smaller than the length and width of the cross section of the crossbeam.

5. The in-cell integrated reinforced battery pack beam and frame structure of claim 4, wherein, The two frame connecting parts respectively comprise a fourth connecting plate and a fifth connecting plate which are connected perpendicularly with the first connecting plate and the third connecting plate respectively.

6. The beam and frame structure for the embedded integrated reinforced battery pack according to any one of claims 3-5, characterized in that, At least one first connecting hole is arranged on the first connecting plate, the third connecting plate, the fourth connecting plate and the fifth connecting plate, wherein, The first connecting plate and the third connecting plate are attached with the inner side of the crossbeam on one side outside the hollow cavity, and the corresponding first connecting holes are fixedly connected with the crossbeam through fasteners; One side of the fourth connecting plate and the fifth connecting plate is attached with the frame, and the corresponding first connecting holes are connected with the frame through fasteners.

7. The in-cell integrated reinforced battery pack beam and frame structure of claim 6, wherein, The fastener is a rivet.

8. The beam and frame structure for the embedded integrated reinforced battery pack according to claim 7, characterized in that, The embedded integrated reinforcing structure can be applied to steel box battery pack and aluminum profile box battery pack.

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