Zipper type battery pack box body inner frame beam structure and battery pack

Abstract

The utility model discloses a zippered battery pack box body inner frame beam structure and battery pack, including cross beam, longeron, first convex edge and second convex edge, a plurality of longeron is provided between the two cross beam, the one side of two cross beam close to each other is provided with a plurality of first notch respectively, and the second convex edge is provided with a plurality of second notch respectively. A protruding part is formed between every two adjacent notches, the first protruding edges are arranged on the sides, close to each other, of the two cross beams respectively, and the second protruding edges are arranged on the two sides of each longitudinal beam respectively. Through the arrangement of the cross beams, the longitudinal beams, the first convex edges and the second convex edges, it can be ensured that the inner frame beam structure has enough mechanical property requirements, a reliable fixing structure is provided for a module with heavy mass, the inner frame beam structure can adapt to complex and variable load working conditions, and the cross beams are provided with the notches to form a zipper type structure, so that the structure is simple and convenient. The rigidity and strength of the whole structure can be improved, meanwhile, materials are reduced as much as possible, and the lightweight design is achieved.

Description

Technical Field

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

[0002] An electric vehicle battery pack mainly consists of main components such as modules, a box body, electrical components, and a cooling and heating assembly. An excellent mechanical performance battery pack is due to having a good box body structure, and a box body with excellent mechanical properties is composed of an inner frame beam, lugs, etc. with excellent structural performance, providing a stable and reliable spatial layout and safety protection for the module system, electrical system, and thermal management system. For the limited design space of the box body, designing a box body with reliable mechanical performance, strong load-bearing capacity, light weight, and simple manufacturing process, the key is how to design the inner frame beam structure well, which is also the difficulty of the design technology.

[0003] Due to reasons such as the large mass of the power battery pack module and the insufficient stiffness of the box body itself, frame beams usually need to be added inside the box body to improve its stiffness and strength performance, and to achieve good load-bearing performance and excellent force transmission between the module and the box body.

[0004] The design of the frame beam in the prior art is to appropriately add support pieces inside or directly increase the thickness of the inner frame beam. Although this kind of strengthening method improves the mechanical performance of the inner frame beam, it also causes problems such as reduced space utilization rate of the battery pack, increased mass, increased cost, and complex manufacturing process of the battery pack, which can neither meet the requirements of lightweight nor increase the development and manufacturing costs of the battery pack. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a zipper-type inner frame beam structure of a battery pack box body and a battery pack to solve the above technical problems.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A zipper-type inner frame beam structure of a battery pack box body includes cross beams, longitudinal beams, a first convex edge, and a second convex edge. A plurality of the longitudinal beams are arranged between the two cross beams. A plurality of notches are respectively formed on one side of the two cross beams close to each other. A raised portion is formed between two adjacent notches. The first convex edges are respectively arranged on one side of the two cross beams close to each other. The second convex edges are respectively arranged on both sides of each longitudinal beam.

[0008] Preferably, a first connection hole is respectively arranged on each raised portion.

[0009] Preferably, it further includes a reinforcing plate. An opening is respectively formed at one end of each cross beam. One side of the opening is a connecting portion, and the other side of the opening is the reinforcing plate.

[0010] As a further preference, the connecting part and the cross beam are integrally formed, and a longitudinal beam is arranged at one end of the connecting part away from the cross beam.

[0011] Preferably, the first convex edge and the cross beam are integrally formed, and the second convex edge and the longitudinal beam are integrally formed.

[0012] Preferably, welding spots are provided on the first convex edge and the second convex edge.

[0013] Preferably, a first baffle is further included, and the first baffle is arranged on one side of the two cross beams away from each other.

[0014] As a further preference, a second baffle is further included, and the second baffle is arranged on the longitudinal beam at one end of the connecting part away from the cross beam.

[0015] As a further preference, two cross beams are provided, at least two longitudinal beams are provided, and two ends of each longitudinal beam are respectively connected to the two cross beams.

[0016] A battery pack includes a zipper-type inner frame beam structure of a battery pack box body, and 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 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.

[0017] The above technical solution has the following advantages or beneficial effects:

[0018] In the present utility model, through the settings of the cross beam, longitudinal beam, first convex edge and second convex edge, it can be ensured that the inner frame beam structure has sufficient mechanical property requirements, provides a reliable fixing structure for the relatively heavy module, and can adapt to complex and variable load conditions. And by opening a plurality of notches in the cross beam to form a zipper-type structure, the stiffness and strength of the overall structure can be improved, and at the same time, the material consumption can be reduced as much as possible to achieve lightweight design. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the zipper-type inner frame beam structure of the battery pack box body in the present utility model;

[0020] Figure 2 is a schematic structural diagram of the battery pack in the present utility model;

[0021] Figure 3 is an exploded schematic diagram of the battery pack in the present utility model.

[0022] In the figure: 1, cross beam; 2, longitudinal beam; 3, first convex edge; 4, second convex edge; 5, notch; 6, convex part; 7, first connection hole; 8, opening; 9, connection part; 10, reinforcement plate; 11, first baffle; 12, second baffle; 13, inner frame beam structure; 14, battery pack box assembly; 15, battery module assembly; 16, lifting lug assembly. Detailed implementation manner

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] In the description of the present invention, it should be noted that terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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 thus should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" 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 invention can be understood according to specific situations.

[0026] Figure 1 It is a schematic structural diagram of the inner frame beam structure of the zipper-type battery pack box in the present invention; Figure 2 It is a schematic structural diagram of the battery pack in the present invention; Figure 3 It is an exploded view of the battery pack in the present invention. Please refer to Figures 1 to 3As shown, a preferred embodiment is shown, which is a zipped inner frame beam structure of a battery pack box, including a cross beam 1, a longitudinal beam 2, a first convex edge 3 and a second convex edge 4. A plurality of longitudinal beams 2 are arranged between the two cross beams 1. A plurality of notches 5 are respectively formed on the sides of the two cross beams 1 close to each other. A convex portion 6 is formed between two adjacent notches 5. First convex edges 3 are respectively arranged on the sides of the two cross beams 1 close to each other. Second convex edges 4 are respectively arranged on both sides of each longitudinal beam 2. In this embodiment, the cross beam 1 and the longitudinal beam 2 are connected by welding or integrally formed, or fixed by bolt connection. The cross beam 1, the longitudinal beam 2, and the first convex edge 3, the second convex edge 4, the first baffle 11 and the second baffle 12 form an inner frame beam structure 13 for installing the battery module assembly 15.

[0027] Among them, referring to Figure 1 As shown, the convex portion 6 and the cross beam 1 are integrally provided. A plurality of convex portions 6 form a structure similar to a zipper, which can reduce the weight of the cross beam 1, improve the stiffness and strength of the overall structure, and at the same time minimize the material consumption as much as possible to achieve a lightweight design.

[0028] The first convex edge 3 and the cross beam 1 are integrally formed, and the second convex edge 4 and the longitudinal beam 2 are integrally formed. There are welding points on the first convex edge 3 and the second convex edge 4, which are convenient for welding connection with the inner wall of the battery pack box assembly 14. Welding points can also be provided on the side walls of the cross beam 1 and the longitudinal beam 2.

[0029] Further, as a preferred implementation manner, a first connection hole 7 is respectively provided on each convex portion 6. The first connection hole 7 in this embodiment is a bolt hole, which is used to cooperate with a bolt to install the battery module assembly 15 at the upper end of the inner frame beam structure 13. In this embodiment, the setting position of the first connection hole 7 is not limited to the convex portion 6, and can also be set on the upper surfaces of the cross beam 1 and the longitudinal beam 2.

[0030] Further, as a preferred implementation manner, a reinforcing plate 10 is further included. An opening 8 is respectively formed at one end of each cross beam 1. One side of the opening 8 is a connecting portion 9, and the other side of the opening 8 is a reinforcing plate 10. Referring to Figure 1 As shown, the notch 5 is provided in the middle of one end of the cross beam 1. The connecting portion 9 and the reinforcing plate 10 and the cross beam 1 are integrally formed, which is convenient for reducing the overall weight of the inner frame beam structure 13 and increasing the overall strength of the inner frame beam structure 13.

[0031] Further, as a preferred implementation manner, the connecting portion 9 and the cross beam 1 are integrally formed, and a longitudinal beam 2 is provided at the end of the connecting portion 9 away from the cross beam 1. Referring to Figure 1 As shown, there are two cross beams 1 and three longitudinal beams 2. The distribution position of the longitudinal beams 2 between the two cross beams 1 is shown in Figure 1As shown, the number of longitudinal beams 2 and cross beams 1 can be set as required.

[0032] Furthermore, as a preferred embodiment, the first convex edge 3 is integrally formed with the cross beam 1, and the second convex edge 4 is integrally formed with the longitudinal beam 2. The first convex edge 3 and the cross beam 1 are arranged at 90°, and the second convex edge 4 and the longitudinal beam 2 are arranged at 90°. When the cross beam 1 and the longitudinal beam 2 are installed in the battery pack box assembly 14, the first convex edge 3 and the second convex edge 4 can contact the inner wall of the battery pack box assembly 14, which is convenient for welding.

[0033] Furthermore, as a preferred embodiment, it further includes a first baffle 11, and the first baffle 11 is arranged on the sides of the two cross beams 1 away from each other. A second baffle 12 is arranged on the longitudinal beam 2 at the end of the connecting part 9 away from the cross beam 1. By arranging the first baffle 11 and the second baffle 12, the position of the battery module assembly 15 can be limited to prevent the side of the battery module assembly 15 from protruding out of the inner frame beam structure 13.

[0034] Furthermore, as a preferred embodiment, there are two cross beams 1 and at least two longitudinal beams 2, and both ends of each longitudinal beam 2 are respectively connected to the cross beam 1. Among them, three longitudinal beams 2 are preferably arranged, and the specific number of arrangements can be selected as required.

[0035] During use, the cross beam 1, the longitudinal beam 2, the first baffle 11 and the second baffle 12 are connected and fixed to form an inner frame beam structure, and then the inner frame beam structure 13 is installed in the battery pack box assembly 14, and then the battery module assembly 15 is installed on the inner frame beam structure 13 by bolts, or the battery module assembly 15 is first installed on the inner frame beam structure 13, and then the inner frame beam structure 13 is installed in the battery pack box assembly 14. The specific installation sequence can be selected as required.

[0036] The above is only a preferred embodiment of the present invention, and does not limit the protection scope and implementation manner of the present invention.

[0037] Based on the above embodiments, the present application also discloses a battery pack, which includes a zipper-type inner frame beam structure 13 of the battery pack box, and also includes a battery pack box assembly 14, a battery module assembly 15 and a lifting lug assembly 16. The inner frame beam structure 13 of the battery pack box is welded and arranged in the battery pack box assembly 14. The battery module assembly 15 is arranged on the inner frame beam structure 13 of the battery pack box, and the lifting lug assembly 16 is arranged at one end of the battery pack box assembly 14. Among them, the lifting lug assembly 16 is welded and connected to the battery pack box assembly 14, and the lifting lug assembly 16 is provided to facilitate the handling of the battery pack. Among them, the first convex edge 3 and the second convex edge 4 respectively contact the bottom wall of the battery pack box assembly 14 to support the inner frame beam structure 13 of the battery pack box.

[0038] The above are only the preferred embodiments of the present utility model, and thus do not limit the implementation manners and protection scope of the present utility model. 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A frame beam structure inside a zippered battery pack box, characterized in that, It includes cross beams, longitudinal beams, a first convex edge and a second convex edge. A plurality of the longitudinal beams are arranged between the two cross beams. A plurality of notches are respectively formed on the sides of the two cross beams close to each other. A raised portion is formed between two adjacent notches. The first convex edges are respectively arranged on the sides of the two cross beams close to each other. The second convex edges are respectively arranged on both sides of each longitudinal beam.

2. The inner frame beam structure of the zippered battery pack box according to claim 1, characterized in that, A first connection hole is respectively arranged on each of the raised portions.

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

4. The inner frame beam structure of the zippered battery pack box according to claim 3, characterized in that, The connecting portion is integrally formed with the cross beam. A longitudinal beam is arranged at one end of the connecting portion away from the cross beam.

5. The inner frame beam structure of the zippered 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 zippered battery pack box according to claim 1, characterized in that, There are welding spots on the first convex edge and the second convex edge.

7. The inner frame beam structure of the zippered battery pack box according to claim 1, characterized in that, It further includes a first baffle. The first baffle is arranged on the sides of the two cross beams away from each other.

8. The inner frame beam structure of the zippered battery pack box according to claim 4, characterized in that, It further includes a second baffle. The second baffle is arranged on the longitudinal beam at one end of the connecting portion away from the cross beam.

9. The inner frame beam structure of the zippered battery pack box according to claim 1, characterized in that, There are two cross beams, and there are at least two longitudinal beams. Both ends of each longitudinal beam are respectively connected to the two cross beams.

10. A battery pack, characterized in that, It includes the zipper-type inner frame beam structure of the battery pack box body according to any one of claims 1-9. 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 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.

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