Lower box body structure of battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a lower box body structure of a battery, which comprises a frame, two reinforcing parts and a plurality of cross beams, the two reinforcing parts are respectively and oppositely arranged on the long edges of the frame, the plurality of cross beams are parallel to the short edges of the frame, and the two ends of one cross beam are respectively connected with the two reinforcing parts. Through the arrangement of the reinforcing component and the cross beam, the arrangement of the cross beam can limit the torsional deformation of the battery lower box body, and the arrangement of the reinforcing component can limit the torsional deformation of the battery lower box body in the vertical and parallel directions of the cross beam, so that the bending rigidity of the battery lower box body is integrally improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and specifically relates to a battery lower housing structure. Background Technology

[0002] During the use of electric vehicle batteries, a battery box is required. Existing battery boxes have low bending stiffness, making them very susceptible to accidental collisions during electric vehicle operation. When the impact force is too large, the battery box inside the electric vehicle will twist and deform, causing damage to the battery inside the battery box. It can also easily lead to battery explosion, causing secondary injuries to the driver. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a battery lower housing structure, including a frame, reinforcing components, and crossbeams. Two reinforcing components are respectively arranged opposite each other on the long side of the frame, and several crossbeams are arranged parallel to the short side of the frame. One of the crossbeams is connected to two reinforcing components at both ends.

[0004] Furthermore, it also includes longitudinal beams, which are arranged perpendicularly to the transverse beams, and the two ends of the longitudinal beams are connected to the short sides of the frame.

[0005] Furthermore, the reinforcing component includes a Japanese-style roll-formed frame, a die-drawn tube, and a reinforcing patch. The two ends of the Japanese-style roll-formed frame are respectively connected to the frame. The die-drawn tube is disposed at the inner top of the Japanese-style roll-formed frame. The reinforcing patch is disposed on the side of the Japanese-style roll-formed frame. One end of one of the crossbeams is connected to the reinforcing patch.

[0006] Furthermore, the reinforcing component also includes plug welding holes, a plurality of which are disposed on the side of the Japanese-type roll-formed frame and on the same side as the reinforcing patch. The plug welding holes are located between the mating surfaces of the Japanese-type roll-formed frame and the die-drawn tube, and the die-drawn tube and the Japanese-type roll-formed frame are welded through the plug welding holes.

[0007] Furthermore, the reinforcing component also includes blind rivets, and a plurality of the blind rivets are disposed on the reinforcing patch.

[0008] Furthermore, it also includes lugs, with two lugs respectively positioned opposite each other on the outer long side of the frame.

[0009] Furthermore, it also includes two midpoint suspension points, which are set on the crossbeam.

[0010] Furthermore, the lugs are connected to the frame by bolts.

[0011] Furthermore, the reinforcing component is welded to the frame at both ends.

[0012] Furthermore, the reinforcing component is made of steel.

[0013] Compared with the prior art, the beneficial effects of this application are as follows:

[0014] The crossbeam in this application can limit the torsional deformation of the lower battery housing, and the reinforcing components can limit the torsional deformation of the lower battery housing in both the vertical and parallel directions of the crossbeam, thereby improving the overall bending stiffness of the lower battery housing.

[0015] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the lower battery housing in an embodiment of this utility model is shown;

[0018] Figure 2 A schematic diagram of the reinforcing component in an embodiment of this utility model is shown;

[0019] Figure 3 A schematic diagram of the lifting lug in an embodiment of this utility model is shown.

[0020] In the diagram, 1. Frame; 2. Reinforcing component; 21. Japanese-style roll-formed frame; 22. Cold-drawn tube; 23. Reinforcing patch; 24. Welded hole; 25. Blind rivet; 3. Crossbeam; 4. Longitudinal beam; 5. Lifting lug; 6. Midpoint lifting point. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] like Figure 1As shown in the figure, a battery lower box structure includes a frame 1, strengthening components 2 and cross beams 3. The two strengthening components 2 are respectively arranged oppositely on the long sides of the frame 1, and a plurality of cross beams 3 are arranged parallel to the short sides of the frame 1. Both ends of one of the cross beams 3 are respectively connected to the two strengthening components 2.

[0023] The frame 1 is rectangular. In order to improve the overall stiffness, the strengthening components 2 are preferably arranged at the central positions of the long sides of the frame 1, so that the force is more evenly distributed. The cross beam 3 located in the middle is connected to the strengthening component 2.

[0024] In order to improve the stiffness of the overall lower box, a plurality of cross beams 3 are evenly distributed in the frame 1, so that the force is more evenly distributed and it is not easy to cause deformation due to uneven force.

[0025] In this application, by arranging the strengthening components 2 on the frame 1, the stiffness of the frame 1 is improved. When the frame 1 is impacted, the frame 1 is not easily bent, and the overall stiffness of the frame 1 is stronger. By arranging a plurality of cross beams 3, the force-bearing capacity of the frame 1 is further improved, and the bending stiffness of the lower box structure is improved.

[0026] The battery lower box structure further includes longitudinal beams 4. The longitudinal beams 4 are arranged perpendicular to the cross beams 3, and both ends of the longitudinal beams 4 are connected to the frame 1.

[0027] Since a plurality of cross beams 3 are installed on the long sides of the frame 1, when the long sides are impacted, the long sides are not easily deformed, while the short sides do not have high stiffness. Therefore, longitudinal beams 4 are arranged. Both ends of the longitudinal beams 4 are arranged on the short sides of the frame 1. In order to make the force more evenly distributed, the longitudinal beams 4 are preferably arranged in the middle. Therefore, arranging the longitudinal beams 4 improves the stiffness and stability of the battery lower box as a whole.

[0028] As Figure 2 shown in the figure, the strengthening component 2 includes a "day"-shaped roll-pressed frame 21, a "mouth"-shaped cold-drawn tube 22 and a strengthening patch 23. Both ends of the "day"-shaped roll-pressed frame 21 are respectively connected to the frame 1. The "mouth"-shaped cold-drawn tube 22 is arranged at the inner top end of the "day"-shaped roll-pressed frame 21. The strengthening patch 23 is arranged on the side surface of the "day"-shaped roll-pressed frame 21. The end of the cross beam 3 is connected to the strengthening patch 23.

[0029] The overall frame of the strengthening component 2 uses a "day"-shaped roll-pressed frame 21. The "day"-shaped roll-pressed frame 21 is in the shape of the Chinese character "day" and has stronger stiffness than a single-side frame body. The strengthening component 2 is made of steel and can withstand stronger extrusion and deformation. The "day"-shaped roll-pressed frame 21 can limit the torsional deformation of the battery lower box in both the vertical and parallel directions of the cross beam 3.

[0030] The "mouth"-shaped cold-drawn tube 22 is sleeved at the inner top end of the "day"-shaped roll-pressed frame 21, further enhancing the stability. The "mouth"-shaped cold-drawn tube 22 limits the deformation of the battery lower box in the vertical direction of the cross beam 3.

[0031] The reinforcing patch 23 restricts the deformation of the lower battery housing in the direction parallel to the crossbeam 3.

[0032] The reinforcing component 2 also includes plug welding holes 24. A plurality of plug welding holes 24 are disposed on the side of the Japanese-type roll-formed frame 21 and on the same side as the reinforcing patch 23. The plug welding holes 24 are located between the mating surfaces of the Japanese-type roll-formed frame 21 and the die-cut cold-drawn tube 22. The die-cut cold-drawn tube 22 and the Japanese-type roll-formed frame 21 are welded through the plug welding holes 24.

[0033] In order to make the Japanese-style roll forming frame 21 and the die-shaped cold-drawn tube 22 more securely fixed, a plug welding hole 24 is provided, through which the die-shaped cold-drawn tube 22 is welded to the Japanese-style roll forming frame 21.

[0034] The reinforcing component 2 also includes a pop rivet 25, and a plurality of the pop rivets 25 are disposed on the reinforcing patch 23.

[0035] The reinforcing patch 23 is fixed to the reinforcing component 2 by a number of blind rivets 25. The blind rivets 25 provide a strong fixing effect in the metal material. At the same time, since the blind rivets 25 are not easy to loosen after connection, they have extremely high reliability.

[0036] It also includes two lifting lugs 5, which are respectively positioned opposite each other on the outer long side of the frame 1. Each of the two lifting lugs 5 has mounting holes, allowing for easy connection between the battery lower housing and the vehicle end.

[0037] It also includes two midpoint suspension points 6, which are set on the crossbeam 3. Mounting holes are provided on the midpoint suspension points 6, allowing for easy connection of the lower battery housing directly to the vehicle end. When the vehicle is subjected to external forces causing the battery pack to bend and deform, the midpoint suspension points 6 first bear a portion of the torsional force. Subsequently, the torsional force is transmitted to the reinforcing component 2 through the crossbeam 3 on the frame 1. The reinforcing patch 23 restricts the deformation of the lower battery housing in the direction parallel to the crossbeam 3, and the orifice-shaped cold-drawn tube 22 restricts the deformation of the lower battery housing in the direction perpendicular to the crossbeam 3. Simultaneously, the hexagonal roll-formed frame 21 restricts the torsional deformation of the lower battery housing in both the perpendicular and parallel directions to the crossbeam 3. Through the combined effect of these structures, the bending stiffness of the lower battery housing is increased and the torsional amplitude is reduced when subjected to torsional deformation.

[0038] like Figure 3 As shown, the lifting lug 5 is connected to the frame 1 by bolts. The lifting lug 5 and the frame 1 are detachably connected by bolts, which facilitates the assembly of the battery lower box with the vehicle. When the battery needs to be replaced or repaired, it will be more convenient and quick, as it can be done directly by removing the bolts.

[0039] The reinforcing component 2 is welded to the frame 1 at both ends, making the connection between the reinforcing component 2 and the frame 1 more stable.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery lower housing structure, characterized in that: It includes a frame (1), reinforcing members (2) and crossbeams (3). Two reinforcing members (2) are respectively arranged opposite each other on the long side of the frame (1), and several crossbeams (3) are arranged parallel to the short side of the frame (1). The two ends of one of the crossbeams (3) are respectively connected to two reinforcing members (2).

2. The battery lower housing structure according to claim 1, characterized in that: It also includes a longitudinal beam (4), which is perpendicular to the crossbeam (3), and the two ends of the longitudinal beam (4) are connected to the short side of the frame (1).

3. The battery lower housing structure according to claim 1, characterized in that: The reinforcing component (2) includes a Japanese-style roll-formed frame (21), a die-cut cold-drawn tube (22), and a reinforcing patch (23). The two ends of the Japanese-style roll-formed frame (21) are connected to the frame (1), the die-cut cold-drawn tube (22) is located at the top inside of the Japanese-style roll-formed frame (21), and the reinforcing patch (23) is located on the side of the Japanese-style roll-formed frame (21). The end of one of the crossbeams (3) is connected to the reinforcing patch (23).

4. The battery lower housing structure according to claim 3, characterized in that: The reinforcing component (2) also includes plug welding holes (24), a plurality of plug welding holes (24) are disposed on the side of the Japanese roll-formed frame (21) and on the same side as the reinforcing patch (23). The plug welding holes (24) are located between the mating surfaces of the Japanese roll-formed frame (21) and the die-drawn tube (22). The die-drawn tube (22) and the Japanese roll-formed frame (21) are welded through the plug welding holes (24).

5. The battery lower housing structure according to claim 3, characterized in that: The reinforcing component (2) also includes a number of blind rivets (25) disposed on the reinforcing patch (23).

6. The battery lower housing structure according to claim 1, characterized in that: It also includes lugs (5), with the two lugs (5) respectively positioned opposite each other on the outer long side of the frame (1).

7. The battery lower housing structure according to claim 1, characterized in that: It also includes midpoint suspension points (6), two of which are set on the crossbeam (3).

8. The battery lower housing structure according to claim 6, characterized in that: The lug (5) is connected to the frame (1) by bolts.

9. The battery lower housing structure according to claim 1, characterized in that: The reinforcing component (2) is welded to the frame (1) at both ends.

10. The battery lower housing structure according to claim 1, characterized in that: The reinforcing component (2) is made of steel.

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