Integrated frame structure for improving side impact strength of battery pack box body and battery pack

Abstract

The utility model discloses an integrated frame structure for improving the side impact strength of a battery pack box body and a battery pack. The integrated frame structure comprises a frame, the bracket is arranged on the frame; the cavity structure is arranged in the frame and the bracket; the partition plate assembly is arranged in the cavity; the cavity structures are arranged in the frame and the support, the cavity structures are internally supported through the partition plate assembly, the first side collision strength area is formed, the support protrudes to form the second side collision strength area, and the first side collision strength area is matched with the second side collision strength area to form the integrated frame structure. According to the utility model, the frame structure is designed to obtain the frame design of the extruded profile of the battery pack, so that when side collision occurs, the side collision resistance can be obviously improved, the structural strength of the frame and the bracket is high, the welding length is greatly reduced, the problem of poor welding quality is avoided, the possibility that a battery cell is extruded and deformed is greatly reduced, the quality is reduced, the process is simple, and the cost is low. The space utilization rate is high.

Description

Technical Field

[0001] This utility model relates to the field of battery pack housing structure technology, and in particular to an integrated frame structure and battery pack that improves the side impact strength of the battery pack housing. Background Technology

[0002] Side impact failure accounts for a large proportion of traffic accident injuries and fatalities. The battery packs of pure electric vehicles have a large capacity and are usually installed under the floor of the passenger compartment. When a side impact occurs, they are easily directly impacted. In addition to the body and the floor of the body participating in the collision energy absorption and energy transfer, the battery pack also bears a large amount of energy. A strong impact on the battery pack may cause excessive deformation of the internal cells, causing leakage, short circuit, and serious consequences such as fire and explosion.

[0003] Battery pack design should enhance its ability to resist side impact deformation. In addition to maintaining a certain distance between the side frame and the module, usually greater than 30mm, the design of the frame itself should also conform to the mechanical transmission path of side impact, so as to effectively protect the internal cells and prevent them from undergoing large deformation and leakage.

[0004] The shortcomings of existing technologies are that the existing CTP battery pack frames are usually designed with extruded aluminum profiles, and the wall thickness of the side frame cavity is usually 2.0mm-3.5mm. In order to improve the side impact resistance, the wall thickness is usually increased by 0.5mm-1.0mm, and a 3mm thick aluminum plate or a small triangular bracket is added at the frame and crossbeam. The aluminum plate or triangular bracket is welded to the side frame, and the crossbeam is welded to the aluminum plate or triangular bracket. The problem with this is that it adds a lot of welding, the welding quality is difficult to control, the cost increases, the bending resistance is poor, and in the case of high-speed collision, the crossbeam can easily penetrate the frame and squeeze the battery cell. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology. In order to achieve the above purpose, an integrated frame structure and battery pack that improve the side impact strength of the battery pack body are adopted to solve the problems mentioned in the background technology.

[0006] An integrated frame structure for improving the side impact resistance of a battery pack housing includes:

[0007] frame;

[0008] A bracket set on the frame;

[0009] Cavity structures set inside the frame and support; and

[0010] A partition assembly installed in the cavity;

[0011] The first side collision strength area is formed by arranging a cavity structure in the inside of the frame and the support and supporting the cavity structure by the partition plate assembly, and the support protrudes to form a second side collision strength area, and the first side collision strength area cooperates with the second side collision strength area to form an integrated frame structure. This design not only improves the strength and stability of the overall structure, but also optimizes the space utilization, so that the device is more practical and efficient.

[0012] As a further scheme of the utility model: the frame and the support adopt an integrated extrusion forming structure, and the support is provided with a cross beam in a welding manner. This structure improves the integrity and strength of the frame and the support, and the setting of the cross beam further enhances the supporting capacity and improves the stability of the overall structure.

[0013] As a further scheme of the utility model: the cavity structure comprises a support cavity arranged in the support and a frame cavity arranged in the frame. This design makes the cavity structure more diversified, can meet the needs of different use scenarios, and improves the flexibility and applicability of the device.

[0014] As a further scheme of the utility model: the cavity structure directions of the support cavity and the frame cavity are consistent. This design makes the overall structure more coordinated and unified, improves the aesthetic degree and use convenience.

[0015] As a further scheme of the utility model: the partition plate assembly is arranged in the inside of the support cavity and the frame cavity. The arrangement of the partition plate assembly not only enhances the supporting capacity of the cavity structure, but also makes the internal space more clear and improves the space utilization.

[0016] As a further scheme of the utility model: the support cavity and the frame cavity adopt a 3-4 layer partition plate structure in a tripod form. This design further enhances the stability and carrying capacity of the cavity structure, and the tripod form also improves the anti-deformation capacity of the overall structure.

[0017] As a further scheme of the utility model: the thickness of the outer wall of the support cavity and the frame cavity and the inner plate of the partition plate assembly is 1.5-3.0 mm. The selection of this thickness range ensures the strength of the structure, avoids resource waste caused by excessive thickness, and improves the economy and practicality of the overall structure.

[0018] As a further scheme of the utility model: the support cavity is formed into an angle structure of 135°±5° at both ends. This angle structure design makes the support cavity more consistent with the mechanical principle, improves the stability and carrying capacity of the overall structure.

[0019] As a further scheme of the utility model: the support length range is 150mm to 350mm, and the length range is adjusted according to the actual side impact position and is located at the frame position. This design makes the length of the support adjustable according to actual requirements, improves the flexibility and applicability of the device, and can better adapt to the requirements of different side impact positions.

[0020] The technical scheme of the second aspect: a battery pack adopts the integrated frame structure for improving the side impact strength of the battery pack box as any one of the above.

[0021] Compared with the prior art, the utility model has the following technical effects:

[0022] The above technical scheme is adopted, the support is arranged on the frame, the cavity structure is constructed inside the frame and the support, the partition plate assembly is arranged in the cavity to provide internal support, the first side impact strength area cooperates with the second side impact strength area to form an integrated frame structure with stable structure and efficient space utilization. This technical scheme significantly improves the stability and carrying capacity of the overall structure, optimizes the space utilization, and enhances the firmness of the cavity structure through the supporting action of the partition plate assembly, so that the device is more durable and suitable for various application scenarios. Moreover, this design greatly reduces the welding length, has strong side impact resistance, is not easy to pierce the frame, has reduced quality, has simple process, and has high space utilization. BRIEF DESCRIPTION OF DRAWINGS

[0023] The specific embodiments of the utility model will be described in detail below with reference to the drawings:

[0024] Figure 1 It is a schematic view of the integrated frame structure of the disclosed embodiment of the application;

[0025] Figure 2 It is a frame and support cross-sectional view of the disclosed embodiment of the application;

[0026] Figure 3 It is a support size view of the disclosed embodiment of the application;

[0027] Figure 4 It is a schematic view of the battery pack with an integrated frame structure of the disclosed embodiment of the application.

[0028] In the figure: 1, frame; 2, support; 3, cavity structure; 31, support cavity; 32, frame cavity; 4, partition plate assembly; 5, cross beam; 6, first side impact strength area; 7, second side impact strength area; 8, upper cover; 9, module; 10, cooling plate; 11, bottom guard plate. DETAILED DESCRIPTION

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please refer to Figure 1 In this embodiment of the utility model, an integrated frame structure for improving the side impact strength of a battery pack housing includes:

[0031] Border 1;

[0032] The bracket 2 is set on the frame 1;

[0033] The cavity structure 3 is set inside the frame 1 and the support 2; and

[0034] Partition assembly 4 is installed in the cavity;

[0035] By setting a cavity structure 3 inside the frame 1 and the bracket 2, and using the partition assembly 4 to internally support the cavity structure 3, a first side impact strength area 6 is formed, and the bracket protrudes to form a second side impact strength area 7. The first side impact strength area 6 and the second side impact strength area 7 form an integrated frame structure, specifically forming an integrated frame structure with a double buffering effect.

[0036] In this embodiment, as Figure 1 As shown, the diagram is a schematic diagram of an integrated frame structure; the frame 1 and the support 2 adopt an integrated extrusion molding structure, and the support 2 is equipped with a crossbeam 5 by welding.

[0037] In this embodiment, the cavity structure 3 includes a support cavity 31 disposed on the support 2 and a frame cavity 32 disposed on the frame 1.

[0038] In this embodiment, as Figure 2 As shown, the figure is a cross-sectional view of the frame 1 and the bracket 2; the cavity structure direction of the bracket cavity 31 and the frame cavity 32 is consistent, and the partition assembly 4 is disposed inside the bracket cavity 31 and the frame cavity 32.

[0039] In this embodiment, the support cavity 31 and the frame cavity 32 adopt a partition structure with 3 to 4 layers and form a triangular frame structure. The thickness of the outer wall of the support cavity 31 and the frame cavity 32 and the inner plate of the partition assembly 4 are both in the range of 1.5mm to 3.0mm. The two ends of the support cavity 31 form an angle structure of 135°±5°.

[0040] In this embodiment, as Figure 3As shown, the figure is a size diagram of the bracket 2; the length of the bracket 2 ranges from 150mm to 350mm, and the length range is adjusted according to the actual side collision position and the position of the frame 1.

[0041] The technical solution of the second aspect: a battery pack, which innovatively adopts the integrated frame structure for improving the side collision strength of the battery pack box as described in any of the above. This design not only optimizes the overall structural layout of the battery pack, but also significantly enhances its safety performance when subjected to side collision.

[0042] As Figure 4 As shown, the figure is a schematic diagram of a battery pack with an integrated frame structure;

[0043] In the figure, the battery pack includes an upper cover 8, a module 9, a cooling plate 10, an integrated frame structure formed by the frame 1, and a bottom guard plate 11.

[0044] Specifically, through precise calculation and simulation analysis, the integrated frame structure integrates the side wall, bottom and possible top structure of the battery pack, making the connection between the components more compact and stable, effectively dispersing and absorbing the impact force during collision, thereby greatly reducing the risk of damage to the battery pack.

[0045] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, and any reference signs in the claims should not be regarded as limiting the claims.

[0046] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An integrated frame structure for improving the side impact strength of a battery pack case, characterized by, The utility model relates to a kind of integrated frame structure for improving the side impact strength of battery pack box, including: Frame (1); Support (2) arranged in frame; Cavity structure (3) arranged inside frame and support; And Partition assembly (4) arranged in cavity; By arranging cavity structure inside frame and support, and using partition assembly to support cavity structure internally, first side impact strength area (6) is formed, and the support protrudes to form second side impact strength area (7), and the first side impact strength area cooperates with second side impact strength area to form integrated frame structure.

2. The integrated frame structure for improving the side impact strength of a battery pack case according to claim 1, wherein The frame and support adopt integrated extrusion forming structure, and the support is provided with crossbeam (5) by welding mode.

3. The integrated frame structure for improving the side impact strength of a battery pack case according to claim 2, wherein The cavity structure includes support cavity (31) arranged in support and frame cavity (32) arranged in frame.

4. The integrated frame structure for improving the side impact strength of a battery pack case according to claim 3, wherein The cavity structure direction of support cavity and frame cavity remains consistent.

5. The integrated frame structure for improving the side impact strength of a battery pack case according to claim 4, wherein The partition assembly is arranged inside support cavity and frame cavity.

6. The integrated frame structure for improving the side impact strength of a battery pack case according to claim 5, wherein The support cavity and frame cavity adopt 3 to 4 layers of partition structure, and form tripod form structure.

7. The integrated frame structure for improving the side impact strength of a battery pack case according to claim 6, wherein The thickness range of the outer wall of support cavity and frame cavity and the inner plate of partition assembly is 1.5mm to 3.0mm.

8. The integrated frame structure for improving the side impact strength of a battery pack case according to claim 6, wherein The two ends of support cavity form 135°±5° angle structure.

9. The integrated frame structure for improving the side impact strength of a battery pack case according to claim 1, wherein The length range of support is 150mm to 350mm, and the length range is adjusted according to actual side impact position and located in frame position.

10. A battery pack, characterized by, An integrated frame structure for improving the side impact strength of battery pack box according to any one of claims 1 to 9 is used.

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