Embedded welding insulation battery shell

Abstract

The utility model discloses an embedded type welding insulation battery shell, which comprises a shell and a neck bush, the shell is provided with at least one side wall and a first opening positioned on one side of the side wall, the neck bush is embedded into the shell from the first opening, one end of the neck bush is closed, and a second opening is formed at the other end of the neck bush. A step face is arranged on the inner wall of the first opening, the neck bush is bent outwards at the second opening to form a bent portion, the neck bush is made of insulation materials, and the bent portion and the step face are attached and welded. The cable is not only insulated and anticorrosive, but also stable and firm in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to an inlaid welded insulating battery shell. Background Art

[0002] Lithium batteries usually include a shell and a battery assembly located inside the shell. Insulation is required between the battery assembly and the shell. Therefore, after the shell is manufactured, a layer of insulating material is usually sprayed on the inner wall of the shell to meet the insulation requirements; or after the battery assembly is manufactured, the battery assembly is insulated, such as wrapping, injection molding, etc., to isolate the battery assembly from the shell. Although this achieves the insulation effect, it has the problems of high manufacturing cost, low production capacity, and low process reliability. Utility Model Content

[0003] The purpose of the utility model is to provide an inlaid welded insulating battery shell designed to solve the deficiencies of the above-mentioned technology.

[0004] The utility model designs an inlaid welded insulating battery shell, including an outer shell and an inner sleeve, the outer shell having at least one side wall and a first opening located on one side of the side wall, the inner sleeve being embedded into the outer shell from the first opening, one end of the inner sleeve being closed and the other end forming a second opening, a step surface being provided on the inner wall of the first opening, the inner sleeve being bent outward at the second opening to form a bent portion, the inner sleeve being made of an insulating material and the bent portion being bonded and welded to the step surface.

[0005] Preferably, the step surface includes a vertical surface and a horizontal surface, the lower surface of the bent portion is attached to the horizontal surface, and the joint between the upper surface of the bent portion and the vertical surface is connected by welding.

[0006] Further optimized, the shell is formed with a first opening and a third opening at both ends thereof, respectively, and an end cover is welded at the third opening.

[0007] Further optimization is made, the shell is formed by bending the plate body and enclosing it to form a seam line, and the seam line is connected by welding.

[0008] Further optimized, the shell is made of aluminum.

[0009] Further optimized, the material of the inner sleeve is plastic.

[0010] The technical effect of the utility model is that the outer shell has a side wall, a first opening is opened on one side of the side wall, the inner sleeve is embedded into the inner shell from the first opening, the inner sleeve is provided with a second opening on the same side of the first opening, the edge of the second opening is bent and fits on the step surface of the inner wall of the outer shell, and the second opening edge of the inner sleeve is fixedly connected to the inner wall of the outer shell by wire welding. Since the inner sleeve is made of non-metallic material, a mosaic-type outer shell is formed, and the interior of the outer shell is isolated by the inner sleeve to play an insulating and anti-corrosion role, avoiding direct contact between the inner wall of the outer shell and the battery element, thereby extending the service life of the outer shell and ultimately extending the service life of the battery; the outer shell is formed by bending a plate structure to form a box-shaped body with openings at both ends, and the bottom opening of the outer shell is connected to the end cover by welding. The seam line of the box-shaped body is located on one of the smaller side surfaces, so that the overall structure of the outer shell is more stable and firm, avoiding deformation of the surrounding wall at the seam line; the outer shell and the inner sleeve are made of dissimilar materials, which is not only convenient for welding but also more stable in connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the overall structural diagram of the utility model from a top view;

[0012] Figure 2 This is the overall structural diagram of the utility model from an upward viewing angle;

[0013] Figure 3 This is an exploded view of the overall structure of the utility model;

[0014] Figure 4 It is a structural sectional view of the utility model.

[0015] In the figure: 1. outer shell; 101. side wall; 102. first opening; 103. third opening; 11. step surface; 111. vertical surface; 112. horizontal surface; 12. seam line; 2. inner sleeve; 201. second opening; 21. bend; 3. end cover; 4. seam. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0017] The utility model comprises an outer shell 1 and an inner sleeve 2. The outer shell 1 is a box-shaped structure and has at least one side wall. A first opening 102 is formed on one side of the side wall.

[0018] like Figure 3As shown, the inner sleeve 2 has the same shape as the outer shell 1. The inner sleeve 2 is embedded in the outer shell 1 from the first opening 102, or fits with the inner wall of the outer shell 1. The material of the inner sleeve 2 is non-metal. The inner sleeve 2 also forms an opening at the same end of the first opening 102, that is, a second opening 201. The inner wall of the outer shell 1 is provided with a step surface 11 at or near the first opening 102. The edge of the second opening 201 of the inner sleeve 2 is bent outward to form a bending portion 21. The height of the inner sleeve 2 is less than the height of the outer shell 1. The second opening 201 of the inner sleeve 2 is located in the outer shell 1, and the bending portion 21 of the inner sleeve 2 is fit together with the step surface 11.

[0019] Furthermore, in this embodiment, if Figure 4 As shown, the step surface 11 includes a vertical surface 111 and a horizontal surface 112. The vertical surface 111 is parallel to the inner wall of the outer shell 1, and the horizontal surface 112 and the vertical surface 111 are perpendicular to each other. The edge of the second opening 201 of the inner sleeve 2 is bent to form a right-angled bend 21. The lower surface of the bend 21 is in contact with the horizontal surface 112, and the end of the bend 21 is in contact with the vertical surface 111, so that a joint 4 is formed between the upper surface of the bend 21 and the vertical surface 111. The joint 4 is connected by welding, that is, the joint 4 serves as a weld, so that the inner sleeve 2 and the inner wall of the outer shell 1 are fixedly connected by line welding.

[0020] Further, if Figure 2 As shown, the other end of the shell 1 is also open, namely the third opening 103, and the end cover 3 is connected to the third opening 103 by welding, wherein the end cover 3 and the shell 1 are made of different materials, forming dissimilar material welding, which is convenient for welding and fixing.

[0021] Furthermore, in this embodiment, Figure 1 As shown, the shell 1 is a plate body that is bent and enclosed to form a box-shaped body with two ends open and in the shape of a rectangular parallelepiped, that is, it is bent and enclosed to form the peripheral wall of the rectangular parallelepiped. After enclosing, it has a seam line 12, and the seam line 12 can be located on one of the relatively smaller side surfaces. The seam line 12 is a welding line, that is, it is connected by welding.

[0022] Furthermore, the inner sleeve 2 is made of plastic, and the outer shell 1 is usually made of aluminum, so that the inner sleeve 2 serves as an insulating layer to meet the corrosion protection requirements inside the outer shell 1.

[0023] Furthermore, after the inner lining 2 is embedded in the outer shell 1 , the inner lining 2 and the inner wall of the outer shell 1 may fit together or leave a gap.

[0024] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.

Claims

1. A mosaic welded insulating battery casing, characterized in that: The invention comprises an outer shell (1) and an inner sleeve (2), wherein the outer shell (1) has at least one side wall (101) and a first opening (102) located on one side of the side wall (101), and the inner sleeve (2) is embedded in the outer shell (1) from the first opening (102), one end of the inner sleeve (2) is closed, and the other end forms a second opening (201), a step surface (11) is provided on the inner wall of the first opening (102), and the inner sleeve (2) is bent outward at the second opening (201) to form a bent portion (21), the inner sleeve (2) is made of an insulating material, and the bent portion (21) and the step surface (11) are bonded and welded.

2. The inlaid welded insulating battery case according to claim 1, characterized in that: The step surface (11) comprises a vertical surface (111) and a horizontal surface (112); the lower surface of the bent portion (21) is attached to the horizontal surface (112); and the joint (4) between the upper surface of the bent portion (21) and the vertical surface (111) is connected by welding.

3. The inlaid welded insulating battery case according to claim 2, characterized in that: The housing (1) is formed with a first opening (102) and a third opening (103) at both ends thereof, respectively, and an end cover (3) is welded to the third opening (103).

4. The inlaid welded insulating battery case according to claim 3, characterized in that: The shell (1) is formed by bending and enclosing a plate body to form a seam line (12), and the seam line (12) is connected by welding.

5. The inlaid welded insulating battery case according to claim 4, characterized in that: The material of the housing (1) is aluminum.

6. The inlaid welded insulating battery case according to claim 4, characterized in that: The material of the inner lining sleeve (2) is plastic.

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