An aluminum shell structure of an electric core

Abstract

The utility model relates to an electric core aluminum shell structure. Including the casing and the apron, the casing is square tubular and its upper part is open, the top of casing four walls is provided with the inclined plane, the inclined plane is inclined downward in the direction from inside to outside, the bottom of apron is provided with the boss, the length and width of boss are equal with the length and width of casing mouth part respectively, the apron is all provided with the recess for cooperating with the inclined plane in the periphery of boss. The utility model is more easy to align the apron with the casing, and the relative displacement between the two after alignment is not easy to occur, when welding, the molten liquid is difficult to enter the casing inside through the gap between the two.

Description

Technical Field

[0001] This utility model relates to an aluminum shell structure for battery cells. Background Technology

[0002] Aluminum casings offer advantages such as good sealing, high strength, and good heat dissipation when used as battery cell housings. After the battery cell is installed in the aluminum casing, the casing and cover plate need to be laser-welded together. After placing the cover plate on the casing, the two need to be aligned before welding. In existing technologies, the cover plate is almost flat, which easily leads to relative displacement after alignment. Furthermore, molten liquid during welding can easily enter the casing through the gap between the two, causing damage to the battery cell. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a battery cell aluminum shell structure in response to the above-mentioned technical deficiencies.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a battery cell aluminum shell structure, including a shell and a cover plate. The shell is in the shape of a square cylinder with an opening at the top. The top of the four walls of the shell is provided with inclined surfaces, which slope downwards from the inside to the outside. The bottom of the cover plate is provided with a boss, the length and width of which are equal to the length and width of the shell opening, respectively. The cover plate is provided with grooves around the boss for cooperating with the inclined surfaces.

[0005] To further optimize this technical solution, the angle between the inclined surface and the outer wall of the shell is 110-120°.

[0006] Compared with the prior art, the present invention has the following advantages: the top of the four walls of the shell is provided with a downward inclined surface in the direction from the inside to the outside, and the bottom of the cover plate is provided with a boss and grooves for cooperating with the inclined surface are provided around the boss, so it is easier to align the cover plate with the shell, and the two are not easy to be displaced relative to each other after alignment. During welding, since the inclined surface is inclined upward in the direction from the outside to the inside, the molten liquid is difficult to enter the shell through the gap between the two. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of an aluminum shell structure for a battery cell.

[0008] In the diagram: 1. Shell; 2. Cover plate; 21. Boss; 22. Groove. Detailed Implementation

[0009] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0010] Detailed implementation method: combined with Figure 1 As shown, a battery cell aluminum shell structure includes a shell 1 and a cover plate 2. The shell 1 is cylindrical with an opening at the top. The top of each of the four walls of the shell 1 is provided with an inclined surface, which slopes downwards from the inside out. The bottom of the cover plate 2 is provided with a boss 21, the length and width of which are equal to the length and width of the opening of the shell 1, respectively. The cover plate 2 has grooves 22 around the bosses 21 to engage with the inclined surfaces. After the cover plate 2 is inserted into the grooves 22 at the top of each of the four walls of the shell 1 and fully inserted, the four sides of the cover plate 2 are aligned with the four sides of the shell 1, and relative displacement between them is not easily observed. During welding, because the inclined surfaces slope downwards from the inside out (i.e., upwards from the outside in), molten liquid is difficult to enter the interior of the shell 1 through the gap between them.

[0011] Preferably, the angle between the inclined surface and the outer wall of the shell 1 is 110-120°, that is, the angle between the inclined surface and the horizontal plane is 20-30°. At this angle, the molten liquid is difficult to enter the interior of the shell 1 along the inclined surface. At this time, the angle between the top surface of the groove 22 and the outer side surface of the cover plate 2 is 60-70°. This angle is not very sharp and has little impact on welding, and will not increase the difficulty of welding.

[0012] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A battery cell aluminum shell structure, comprising a shell (1) and a cover plate (2), wherein the shell (1) is cylindrical and has an opening at the top, characterized in that: The top of the four walls of the shell (1) is provided with a slope, which slopes downward from the inside to the outside. The bottom of the cover plate (2) is provided with a boss (21), the length and width of which are equal to the length and width of the opening of the shell (1). The cover plate (2) is provided with grooves (22) around the boss (21) to cooperate with the slope.

2. The battery cell aluminum shell structure according to claim 1, characterized in that: The angle between the inclined surface and the outer wall of the shell (1) is 110-120°.

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