Frame beam structure in battery pack box body and battery pack

Abstract

The utility model discloses a battery pack box body inner frame beam structure and a battery pack, and relates to the technical field of battery pack supports, the battery pack box body inner frame beam structure comprises cross beams and longitudinal beams, a plurality of longitudinal beams are arranged between the two cross beams, one ends of the two cross beams are bent towards the direction away from each other to form a connecting part, each cross beam is respectively provided with a groove, and the two ends of each cross beam are respectively provided with a groove. First convex edges are arranged on the sides, close to each other, of the two cross beams respectively, and second convex edges are arranged on the two sides of each longitudinal beam respectively. The frame beam structure in the box body of the battery pack has good mechanical property, strong bearing capacity and deformation resistance, enough rigidity, strength and reliability, light weight and is beneficial to improving the energy density of the battery pack.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack brackets, in particular to an inner frame beam structure of a battery pack box body and a battery pack. Background Technique

[0002] Automotive power battery packs are mainly composed of main components such as a box body, battery modules, thermal management, and electrical components. The stamping box body is composed of box body stamping parts, inner frame beams, lifting lugs, bolt fasteners, etc. The box body provides a stable and reliable space layout and safety protection for battery modules, electrical components, and the thermal management system.

[0003] In the prior art, to ensure the connection reliability between the battery module and the box body and guarantee good load-bearing capacity and force transmission. The existing design method is to increase the thickness of the inner frame beam or add support pieces inside the inner frame beam, and then use long bolts to connect and fix with the module. However, although the inner frame beam of this setting method has guaranteed rigidity and strength, the inner frame beam assembly is heavy in mass, high in cost, and complex in manufacturing process, unable to meet the requirements of lightweight, and at the same time reducing the energy density of the battery pack. Content of the Utility Model

[0004] The purpose of the utility model is to provide an inner frame beam structure of a battery pack box body and a battery pack to solve the above technical problems.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An inner frame beam structure of a battery pack box body includes a cross beam and a longitudinal beam. A plurality of the longitudinal beams are arranged between the two cross beams. One end of the two cross beams bends in a direction away from each other to form a connecting portion. Each cross beam is respectively provided with a groove, and the two sides of each cross beam close to each other are respectively provided with a first convex edge. The two sides of each longitudinal beam are respectively provided with a second convex edge.

[0007] Preferably, each cross beam is respectively provided with a plurality of first connecting holes.

[0008] Preferably, it further includes a reinforcing plate. One end of each cross beam is respectively provided with a notch. One side of the notch is the connecting portion, and the other side of the notch is the reinforcing plate.

[0009] Preferably, the longitudinal beams are arranged at both ends and the middle of the two cross beams.

[0010] Preferably, the first convex edge is integrally formed with the cross beam, and the second convex edge is integrally formed with the longitudinal beam.

[0011] Preferably, the first convex edge and the second convex edge have welding points.

[0012] Preferably, it further includes a first baffle, and the first baffle is arranged on one side of the two cross beams away from each other.

[0013] Preferably, it further includes a second baffle, and the second baffle is arranged on the longitudinal beam at one end of the two cross beams.

[0014] A battery pack includes an inner frame beam structure of a battery pack box body, and further includes a battery pack box body assembly, a battery module assembly, and a lifting lug assembly. The inner frame beam structure of the battery pack box body is welded and arranged in the battery pack box body assembly. The battery module assembly is arranged on the inner frame beam structure of the battery pack box body, and the lifting lug assembly is arranged at one end of the battery pack box body assembly.

[0015] As a further preference, the first convex edge and the second convex edge in the inner frame beam structure of the battery pack box body are respectively in contact with the inner wall of the battery pack box body assembly.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] The inner frame beam structure of the battery pack box body in the present utility model has good mechanical properties, strong load-bearing capacity and anti-deformation ability, has sufficient stiffness, strength and reliability, and is light in weight, which is beneficial to improving the energy density of the battery pack. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the inner frame beam structure of the battery pack box body in the present utility model;

[0019] Figure 2 is a usage state diagram of the inner frame beam structure of the battery pack box body in the present utility model;

[0020] Figure 3 is an exploded schematic diagram of the usage state of the inner frame beam structure of the battery pack box body in the present utility model.

[0021] In the figure: 1, cross beam; 2, longitudinal beam; 3, connecting part; 4, groove; 5, first convex edge; 6, second convex edge; 7, first connection hole; 8, reinforcement plate; 9, notch; 10, first baffle; 11, second baffle; 12, inner frame beam structure; 13, battery pack box body assembly; 14, battery module assembly; 15, lifting lug assembly. Detailed Embodiments

[0022] The technical solution of the present utility model will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be noted that when terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, when terms such as "first", "second", "third" appear, they are only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, when terms such as "installation", "connection", "coupling" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Figure 1 is a schematic structural view of the inner frame beam structure of the battery pack box in the present utility model; Figure 2 is a view of the use state of the inner frame beam structure of the battery pack box in the present utility model; Figure 3 is an exploded schematic view of the use state of the inner frame beam structure of the battery pack box in the present utility model. Please refer to Figures 1 to 3 As shown, a preferred embodiment is shown. A structure of an inner frame beam in a battery pack box is shown, including a cross beam 1 and a longitudinal beam 2. A plurality of longitudinal beams 2 are arranged between the two cross beams 1. One end of each of the two cross beams 1 is bent in a direction away from each other to form a connecting portion 3. A groove 4 is respectively formed on each cross beam 1. First convex edges 5 are respectively arranged on the sides of the two cross beams 1 close to each other. Second convex edges 6 are respectively arranged on both sides of each longitudinal beam 2. Refer to Figure 1 As shown, among them, there are two cross beams 1 and three longitudinal beams 2. The number of longitudinal beams 2 and cross beams 1 can be set according to needs. The cross beam 1 and the longitudinal beam 2 are fixedly connected through connection. The longitudinal beam 2 and the cross beam 1 are provided to support the battery module assembly 14, and the cross beam 1 and the longitudinal beam 2 are welded and connected to the battery pack box assembly 13 through the first convex edge 5 and the second convex edge 6.

[0026] In this embodiment, grooves 4 are arranged on both the cross beam 1 and the connecting portion 3, which is convenient for reducing the weight of the cross beam 1. The support battery module assembly 14 is bolt - connected to both the cross beam 1 and the longitudinal beam 2.

[0027] In this embodiment, both the cross beam 1 and the longitudinal beam 2 are made of aluminum alloy material, which can increase the overall strength and reduce the weight. During use, the cross beam 1 and the longitudinal beam 2 are connected and fixed, and then the cross beam 1 and the longitudinal beam 2 are placed inside the battery pack box assembly 13. The first convex edge 5, the second convex edge 6, the longitudinal beam 2 and the cross beam 1 are welded and fixed to the battery pack box assembly 13 by spot welding and welding seams, and then the battery module assembly 14 is installed on the longitudinal beam 2 and the cross beam 1 through bolts.

[0028] Further, as a preferred embodiment, a plurality of first connection holes 7 are respectively formed in each cross beam 1. The first connection holes 7 can be bolt holes, which are used to cooperate with bolts to facilitate the installation of the battery module assembly 14 on the inner frame beam structure 12 formed by the cross beam 1 and the longitudinal beam 2.

[0029] Further, as a preferred embodiment, a reinforcing plate 8 is further included. A notch 9 is respectively formed at one end of each cross beam 1. One side of the notch 9 is the connecting portion 3, and the other side of the notch 9 is the reinforcing plate 8. Refer Figure 1 As shown, the notch 9 is formed in the middle of one end of the cross beam 1. The formed notch 9 can reduce the weight of the cross beam 1, and the setting of the reinforcing plate 8 can increase the structural strength of the cross beam 1.

[0030] In this embodiment, through the settings of the first convex edge 5 and the second convex edge 6, the overall strength of the cross beam 1 and the longitudinal beam 2 can be increased.

[0031] Further, as a preferred embodiment, longitudinal beams 2 are provided at both ends and the middle of the two cross beams 1. The distribution manner of the three cross beams 1 is shown in Figure 1 As shown, the cross beam 1 and the longitudinal beam 2 can be welded, integrally formed, or connected by bolts.

[0032] Further, as a preferred embodiment, the first convex edge 5 is integrally formed with the cross beam 1, and the second convex edge 6 is integrally formed with the longitudinal beam 2. Refer Figure 1 As shown, between the first convex edge 5 and the cross beam 1, and between the second convex edge 6 and the longitudinal beam 2, the integral forming method is preferably adopted, and the connection method can be not limited to integral forming. Among them, the included angle between the first convex edge 5 and the cross beam 1 can be 90°, and the included angle between the second convex edge 6 and the longitudinal beam 2 can be 90°. When the cross beam 1 and the longitudinal beam 2 are installed inside the battery pack box assembly 13, both the first convex edge 5 and the second convex edge 6 can contact the inner wall of the battery pack box assembly 13, and can play a supporting role.

[0033] Further, as a preferred embodiment, solder joints are provided on the first convex edge 5 and the second convex edge 6. By providing the solder joints, it is convenient to weld the first convex edge 5 and the second convex edge 6 to the inner wall of the battery pack box body assembly 13, and solder joints can be provided on the bottom or side wall of the cross beam 1 and the longitudinal beam 2.

[0034] Further, as a preferred embodiment, it further includes a first baffle 10, and the first baffle 10 is provided on the sides of the two cross beams 1 away from each other. A second baffle 11 is provided on the longitudinal beam 2 at one end of the two cross beams 1. The first baffle 10 and the second baffle 11 are provided to limit the battery module assembly 14 to prevent the side of the battery module assembly 14 from protruding out of the inner frame beam structure 12.

[0035] A battery pack includes an inner frame beam structure 12 of the battery pack box body, and further includes a battery pack box body assembly 13, a battery module assembly 14 and a lifting lug assembly 15. The inner frame beam structure 12 of the battery pack box body is welded and arranged in the battery pack box body assembly 13. The battery module assembly 14 is arranged on the inner frame beam structure 12 of the battery pack box body, and the lifting lug assembly 15 is arranged at one end of the battery pack box body assembly 13. By providing the lifting lug assembly 15, it is convenient to carry the battery pack. Wherein, the first convex edge 5 and the second convex edge 6 of the inner frame beam structure 12 of the battery pack box body are respectively abutted against the inner wall of the battery pack box body assembly 13, that is, in contact with the bottom wall of the battery pack box body assembly 13. Such a setting can achieve the effect of supporting the inner frame beam structure 12 of the battery pack box body.

[0036] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all the equivalent replacements and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A frame beam structure inside a battery pack box, characterized in that It includes cross beams and longitudinal beams. A number of the longitudinal beams are arranged between the two cross beams. One end of each of the two cross beams is bent in a direction away from each other to form a connecting portion. Grooves are respectively formed on each of the cross beams. First convex edges are respectively arranged on one side of the two cross beams close to each other. Second convex edges are respectively arranged on both sides of each of the longitudinal beams.

2. The inner frame beam structure of the battery pack box according to claim 1, wherein A number of first connection holes are respectively formed on each of the cross beams.

3. The inner frame beam structure of the battery pack box according to claim 1, characterized in that, It further includes reinforcing plates. A notch is respectively formed at one end of each of the cross beams. One side of the notch is the connecting portion, and the other side of the notch is the reinforcing plate.

4. The inner frame beam structure of the battery pack box according to claim 1, characterized in that, The longitudinal beams are arranged at both ends and the middle of the two cross beams.

5. The inner frame beam structure of the battery pack box according to claim 1, characterized in that, The first convex edge is integrally formed with the cross beam, and the second convex edge is integrally formed with the longitudinal beam.

6. The inner frame beam structure of the battery pack box according to claim 1, characterized in that, Welding points are provided on the first convex edge and the second convex edge.

7. The inner frame beam structure of the battery pack box according to claim 1, wherein, It further includes a first baffle plate. The first baffle plate is arranged on one side of the two cross beams away from each other.

8. The inner frame beam structure of the battery pack box according to claim 1, characterized in that, It further includes a second baffle plate. The second baffle plate is arranged on the longitudinal beam at one end of the two cross beams.

9. A battery pack, characterized in that, It includes the inner frame beam structure of the battery pack box body according to any one of claims 1-8. It further includes a battery pack box body assembly and a battery module assembly. The inner frame beam structure of the battery pack box body is welded and arranged in the battery pack box body assembly, and the battery module assembly is arranged on the inner frame beam structure of the battery pack box body.

10. The battery pack according to claim 9, wherein, The first convex edge and the second convex edge in the inner frame beam structure of the battery pack box body are respectively in contact with the inner wall of the battery pack box body assembly.

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