A battery pack case frame structure

Abstract

The utility model discloses a battery package box frame structure, include: frame and a plurality of crossbeam, a plurality of crossbeam parallelly distribute in the inboard of frame, and the both ends of every crossbeam are embedded and welded to the two side walls of frame respectively, and every crossbeam is equipped with the connecting portion who is connected with battery module. The utility model discloses the crossbeam of this embodiment embeds and welds in the two side walls of frame, compared with traditional direct lap welding mode, the connecting strength of crossbeam and frame is strengthened, reduces the deformation when module is bigger and the quality is heavier, reduces the influence to liquid cooling plate stress, and the multiple installation area formed simultaneously is convenient for the positioning installation of battery module.

Description

Technical Field

[0001] This utility model relates to the technical field of battery packs, and in particular to a battery pack housing frame structure. Background Technology

[0002] As the driving range of electric vehicles increases, there is a need to achieve a larger capacity arrangement in the on-board battery pack within a limited space. Its structure is constrained by the vehicle's external enclosure and the internal space of the enclosure, making it difficult to arbitrarily change the internal module layout. To improve the battery pack's modal characteristics and overall strength without altering the internal module and electrical component arrangement, the enclosure frame needs to be optimized.

[0003] However, existing technologies have several problems: First, the frame and crossbeams are often welded together, which causes significant deformation when the module is large and heavy, affecting the stress of the liquid cooling plate. Second, increasing the thickness of the beams or adding reinforcement inside the beams or frame to improve the battery pack system modes makes the frame cavity complex and bulky, with complicated processes and unable to meet the requirements for lightweighting. Third, increasing the height of the crossbeams to increase contact and balance force transmission compresses the internal space of the enclosure, affecting the arrangement of electrical components and wiring harnesses, making it difficult to maximize space utilization. Utility Model Content

[0004] In view of the above-mentioned problems with existing battery pack frames, this paper aims to provide a battery pack frame structure.

[0005] The specific technical solution is as follows:

[0006] A battery pack housing frame structure includes: a frame and multiple crossbeams, the multiple crossbeams being distributed parallel to each other on the inner side of the frame, the two ends of each crossbeam being embedded and welded to the two side walls of the frame, and each crossbeam having a connection part for connecting to a battery module.

[0007] As a further improvement and optimization of this solution, frame beams are formed on both sides of the frame, and each frame beam is provided with multiple mounting holes. One end of each of the multiple crossbeams is respectively embedded and welded into the multiple mounting holes.

[0008] As a further improvement and optimization of this solution, a notch is formed at the top of both ends of each of the crossbeams.

[0009] As a further improvement and optimization of this solution, at least one reinforcing beam is also connected to the inner side of the frame. The reinforcing beam is perpendicular to the crossbeam and is connected to multiple crossbeams respectively.

[0010] As a further improvement and optimization of this solution, the reinforcing beam is connected to the bottom of the crossbeam.

[0011] As a further improvement and optimization of this solution, the reinforcing beam is embedded in the bottom of the crossbeam.

[0012] As a further improvement and optimization of this solution, the reinforcing beam is welded to the crossbeam.

[0013] As a further improvement and optimization of this solution, the crossbeam is arranged along the width direction of the frame.

[0014] As a further improvement and optimization of this solution, the reinforcing beam is arranged along the length direction of the frame.

[0015] As a further improvement and optimization of this solution, the bottom of the frame structure is connected to the battery pack housing, and the frame structure is connected to the battery module by bolts.

[0016] The positive effects of the above technical solution compared with the existing technology are:

[0017] This utility model embeds the crossbeam into the inner walls of the frame for welding. Compared with the traditional direct lap welding method, it enhances the connection strength between the crossbeam and the frame, reduces deformation when the module is large and heavy, reduces the impact on the stress of the liquid cooling plate, and the multiple installation areas formed at the same time facilitate the positioning and installation of the battery module. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the battery pack housing frame structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the assembly of a battery pack housing frame structure and a battery module according to the present invention.

[0020] Figure 3 This is a schematic diagram of the assembly of a battery pack housing frame structure and a battery housing according to the present invention.

[0021] Figure 4 This is a schematic diagram of the mounting port of a battery pack housing frame structure according to the present invention;

[0022] Figure 5 This is a schematic diagram of the assembly of the crossbeam and mounting port of a battery pack box frame structure according to this utility model;

[0023] In the attached diagram: 1. Frame; 2. Crossbeam; 3. Reinforcing beam; 4. Battery module; 5. Battery pack housing; 11. Frame beam; 21. Notch; 111. Mounting port. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Figure 1 This is a structural diagram of a battery pack housing frame structure according to the present invention. Figure 2 This is a schematic diagram of the assembly of a battery pack housing frame structure and a battery module according to the present invention. Figure 3 This is a schematic diagram of the assembly of a battery pack housing frame structure and a battery housing according to the present invention. Figure 4 This is a schematic diagram of the mounting port of a battery pack housing frame structure according to the present invention. Figure 5 This is a schematic diagram of the assembly of the crossbeam and mounting port of a battery pack housing frame structure according to this utility model. Figure 1-5 As shown, a preferred embodiment of a battery pack housing 5 frame 1 structure is illustrated, including: a frame 1 and a plurality of crossbeams 2, the plurality of crossbeams 2 being distributed parallel to each other on the inner side of the frame 1, the two ends of each crossbeam 2 being embedded and welded to the two side walls of the frame 1 respectively, and each crossbeam 2 being provided with a connection part for connecting to the battery module.

[0028] Specifically, multiple installation areas are formed between the multiple crossbeams 2 and the frame 1 for installing multiple battery modules 4 respectively. More specifically, the end plates of the battery modules 4 are connected to the crossbeams 2 and the frame 1 by bolts.

[0029] In this embodiment, the crossbeam 2 is embedded in the two side walls of the frame 1 and welded. Compared with the traditional direct lap welding method, this enhances the connection strength between the crossbeam 2 and the frame 1, reduces deformation when the module is large and heavy, reduces the impact on the stress of the liquid cooling plate, and the multiple installation areas formed facilitate the positioning and installation of the battery module 4.

[0030] Furthermore, as a preferred embodiment, frame beams 11 are formed on both side walls of the frame 1. Each frame beam 11 is provided with multiple mounting holes 111. One end of multiple crossbeams 2 is respectively embedded and welded into multiple mounting holes 111. The mounting holes 111 are provided on the frame beams 11, and the crossbeams 2 are embedded into the mounting holes 111 and welded, which further improves the connection stability and accuracy between the crossbeams 2 and the frame 1, ensures that the crossbeams 2 are accurately positioned in the frame 1, and helps to improve the structural strength of the entire box frame 1.

[0031] Furthermore, as a preferred embodiment, a notch 21 is formed at the top of both ends of each crossbeam 2. The notch 21 at the top of both ends of the crossbeam 2 can reduce the weight of the crossbeam 2 to a certain extent, which helps to achieve the lightweight design of the battery pack, while not affecting the connection strength and structural stability between the crossbeam 2 and the frame 1.

[0032] Furthermore, as a preferred embodiment, at least one reinforcing beam 3 is also connected to the inner side of the frame 1. The reinforcing beam 3 is perpendicular to the crossbeam 2 and is connected to multiple crossbeams 2 respectively. The addition of the perpendicular connection between the reinforcing beam 3 and the crossbeam 2 can significantly improve the overall strength and modal characteristics of the box frame 1, enhance the battery pack's resistance to deformation under various working conditions, and ensure the safety and reliability of the battery pack.

[0033] Furthermore, as a preferred embodiment, the bottom connection between the reinforced beam 3 and the crossbeam 2 is strengthened. This strengthens the support capacity of the crossbeam 2 without occupying too much internal space of the box, thereby improving the structural stability of the entire box frame 1 and avoiding excessive impact on the internal electrical components and wiring harness arrangement.

[0034] Furthermore, as a preferred embodiment, the reinforcing beam 3 is embedded in the bottom of the crossbeam 2. This increases the contact area and connection strength between the reinforcing beam 3 and the crossbeam 2, making the force transmission between them more uniform and effectively improving the overall strength and deformation resistance of the box frame 1.

[0035] Furthermore, as a preferred embodiment, the reinforcing beam 3 is welded to the crossbeam 2. Welding the reinforcing beam 3 to the crossbeam 2 ensures the connection strength and stability between the two, enabling the reinforcing beam 3 to better enhance the overall strength and modal stability of the box frame 1.

[0036] In another embodiment, the reinforcing beam 3 and the crossbeam 3 can also be connected by bolts. Of course, the reinforcing beam 3 and the frame 1 can also be connected by welding or bolts.

[0037] Furthermore, as a preferred embodiment, the crossbeam 2 is arranged along the width direction of the frame 1, and the reinforcing beam 3 is arranged along the length direction of the frame 1. The reinforcing beam 3 is arranged along the length direction of the frame 1, forming a reasonable mechanical structure with the crossbeam 2 arranged along the width direction, which further enhances the overall strength and modal properties of the box frame 1 and effectively resists forces and vibrations from different directions.

[0038] Furthermore, as a preferred embodiment, the bottom of the frame structure is connected to the battery pack housing 5, and the frame structure is connected to the battery module 4 by bolts. The bolt connection method facilitates the installation and disassembly of the frame structure 1, the battery pack housing 5, and the battery module 4, improving production efficiency and maintenance convenience. At the same time, the bolt connection has a certain degree of adjustability, which can ensure the tightness and stability of the connection.

[0039] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery pack housing frame structure, characterized in that, include: The frame and multiple crossbeams are arranged parallel to each other on the inner side of the frame. The two ends of each crossbeam are respectively embedded and welded to the two side walls of the frame. Each crossbeam is provided with a connection part for connecting to the battery module.

2. The battery pack housing frame structure according to claim 1, characterized in that, Frame beams are formed on both sides of the frame, and each frame beam is provided with multiple mounting holes. One end of each of the multiple crossbeams is respectively embedded and welded into the multiple mounting holes.

3. The battery pack housing frame structure according to claim 2, characterized in that, A notch is formed at the top of both ends of each of the aforementioned beams.

4. The battery pack housing frame structure according to claim 1, characterized in that, The inner side of the frame is also connected to at least one reinforcing beam, which is perpendicular to the crossbeam and is connected to multiple crossbeams respectively.

5. The battery pack housing frame structure according to claim 4, characterized in that, The reinforcing beam is connected to the bottom of the crossbeam.

6. The battery pack housing frame structure according to claim 5, characterized in that, The reinforcing beam is embedded in the bottom of the crossbeam.

7. The battery pack housing frame structure according to claim 6, characterized in that, The reinforcing beam is welded to the crossbeam.

8. The battery pack housing frame structure according to any one of claims 1-7, characterized in that, The crossbeam is arranged along the width direction of the frame.

9. The battery pack housing frame structure according to any one of claims 4-7, characterized in that, The reinforcing beam is arranged along the length of the frame.

10. The battery pack housing frame structure according to claim 1, characterized in that, The bottom of the frame structure is connected to the battery pack housing, and the frame structure is connected to the battery module by bolts.

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