Spiral welding combined cap

Abstract

The utility model relates to the technical field of power batteries, in particular to a spiral welding combined cap, which is characterized in that an explosion-proof aluminum sheet and a connecting aluminum sheet of the spiral welding combined cap are welded by a laser welding template, the laser welding template forms a circle of arc formed by a plurality of uniform and continuous spirals, and the connecting aluminum sheet is connected with the explosion-proof aluminum sheet. According to the spiral welding combined cap, in order to increase the welding strength and improve the welding mode between the explosion-proof aluminum sheet and the connecting aluminum sheet into spiral welding, the welding template is changed into a circle of arc formed by a plurality of uniform and continuous spirals, the welding width can be widened through the spirals, the welding appearance is not influenced, and the welding efficiency is improved. Therefore, the welding strength is improved in a limited welding space, and the technical problem that in the prior art, a single-wire welding mode is adopted for laser welding of the battery combination cap, and consequently the connection strength is insufficient is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a spirally welded combined cap. Background Art

[0002] When assembling the battery assembly cap, laser welding is used to connect the components together, such as the explosion-proof aluminum sheet and the connecting aluminum sheet. The strength of the welding determines the firmness between the components. The common welding method is single-line welding, and the welding template is a linear arc. The welding width is limited and the welding strength is insufficient. It is impossible to achieve the required welding strength within the limited welding depth. Utility Model Content

[0003] In order to solve the technical problem that the laser welding of the battery assembly cap in the prior art adopts a single-wire welding method, resulting in insufficient connection strength, the present application proposes a spirally welded assembly cap to solve the above technical problem.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] The utility model provides a spiral welding combined cap, characterized in that the explosion-proof aluminum sheet and the connecting aluminum sheet of the spiral welding combined cap are welded by using a laser welding template, and the laser welding template is formed into a circle of arcs composed of a plurality of uniform and continuous spirals.

[0006] Furthermore, the middle area of ​​the connecting aluminum sheet is welded to the middle area of ​​the explosion-proof aluminum sheet, and the periphery of the connecting aluminum sheet is separated from the explosion-proof aluminum sheet by an isolating piece.

[0007] Furthermore, the middle area of ​​the explosion-proof aluminum sheet is slightly bent at the main body and connected to the middle area of ​​the connecting aluminum sheet.

[0008] Furthermore, it also includes a connecting steel cap, which is arranged on the side of the explosion-proof aluminum sheet facing away from the connecting aluminum sheet, and the outer periphery of the connecting steel cap is enveloped by the outer periphery of the folded explosion-proof aluminum sheet.

[0009] Furthermore, it also includes a sealing member, which is wrapped around the periphery of the connecting aluminum sheet, the isolation member, the explosion-proof aluminum sheet and the connecting steel cap.

[0010] Based on the above technical solution, the technical effects that can be achieved by the utility model are:

[0011] The spiral welding combination cap of the utility model improves the welding method between the explosion-proof aluminum sheet and the connecting aluminum sheet to spiral welding in order to increase the welding strength. The laser welding template is changed to a circle arc composed of multiple uniform and continuous spirals. The spiral can widen the welding width without affecting the welding appearance, thereby improving the welding strength in a limited welding space, solving the technical problem of insufficient connection strength caused by the single-line welding method used in the laser welding of the battery combination cap in the prior art.

[0012] The spiral welded combination cap of the utility model adopts a spiral welding method to enhance the welding strength. Therefore, the middle area of ​​the explosion-proof aluminum sheet used for welding does not need a specially designed mold to form a stable bulge in the middle area. It only needs to slightly bend the middle area of ​​the explosion-proof aluminum sheet during welding to complete the connection between the explosion-proof aluminum sheet and the connecting aluminum sheet, thereby simplifying the process and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a laser welding template of a spiral welding assembly cap of the utility model;

[0014] Figure 2 It is a schematic diagram of the overall structure of the spiral welding combined cap of the utility model.

[0015] Among them: 1-laser welding template; 2-connecting aluminum sheet; 3-explosion-proof aluminum sheet; 4-isolating piece; 5-connecting steel cap; 6-sealing piece. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0017] like Figure 1-2 As shown, the utility model provides a spiral welding combination cap, wherein the explosion-proof aluminum sheet 3 and the connecting aluminum sheet 2 of the spiral welding combination cap are welded by a laser welding template 1, and the laser welding template 1 is formed into a circle of arcs composed of multiple uniform and continuous spirals. In a specific embodiment of the utility model, the laser welding template 1 is digital and is used for programming automated welding equipment.

[0018] The spiral welding combination cap of the utility model improves the welding method between the explosion-proof aluminum sheet 3 and the connecting aluminum sheet 2 to spiral welding in order to increase the welding strength. The laser welding template 1 is changed to a circle of arcs composed of multiple uniform and continuous spirals. The welding width can be widened by the spiral without affecting the welding appearance, thereby improving the welding strength in a limited welding space, solving the technical problem of insufficient connection strength caused by the single-line welding method used in the laser welding of the battery combination cap in the prior art.

[0019] In a specific embodiment of the present invention, the middle area of ​​the connecting aluminum sheet 2 is welded to the middle area of ​​the explosion-proof aluminum sheet 3, and the periphery of the connecting aluminum sheet 2 is separated from the explosion-proof aluminum sheet 3 by an isolating member 4 to ensure normal conduction of current.

[0020] In a specific embodiment of the present invention, the middle area of ​​the explosion-proof aluminum sheet 3 is slightly bent at the main body and connected to the middle area of ​​the connecting aluminum sheet 2 .

[0021] The spirally welded combined cap of the utility model adopts a spiral welding method to enhance the welding strength. Therefore, the middle area of ​​the explosion-proof aluminum sheet 3 used for welding does not need a specially designed mold to form a stable convex portion in the middle area. It only needs to slightly bend the middle area of ​​the explosion-proof aluminum sheet 3 during welding to complete the connection between the explosion-proof aluminum sheet 3 and the connecting aluminum sheet 2, which simplifies the process and reduces the production cost.

[0022] In a specific embodiment of the utility model, the spiral welded combination cap of the utility model also includes a connecting steel cap 5, which is arranged on the side of the explosion-proof aluminum sheet 3 facing away from the connecting aluminum sheet 2. The outer periphery of the connecting steel cap 5 is enveloped by the outer periphery of the folded explosion-proof aluminum sheet 3, and the connecting steel cap 5 can facilitate the subsequent assembly and connection of the battery.

[0023] The spiral welded combined cap of the utility model further comprises a sealing member 6, which is wrapped around the periphery of the connecting aluminum sheet 2, the isolating member 4, the explosion-proof aluminum sheet 3 and the connecting steel cap 5 to ensure the sealing of the end of the finished battery.

[0024] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A spiral welded combined cap, characterized in that: The explosion-proof aluminum sheet (3) and the connecting aluminum sheet (2) of the spiral welding assembly cap are welded using a laser welding template (1), and the laser welding template (1) is formed into a circle of arcs composed of a plurality of uniform and continuous spirals.

2. The spiral welded combined cap according to claim 1, characterized in that: The middle area of ​​the connecting aluminum sheet (2) is welded to the middle area of ​​the explosion-proof aluminum sheet (3), and the periphery of the connecting aluminum sheet (2) is separated from the explosion-proof aluminum sheet (3) by an isolating piece (4).

3. The spiral welded combined cap according to claim 2, characterized in that: The middle area of ​​the explosion-proof aluminum sheet (3) is slightly bent at the main body and connected to the middle area of ​​the connecting aluminum sheet (2).

4. The spiral welded combined cap according to claim 3, characterized in that: It also comprises a connecting steel cap (5), which is arranged on a side of the explosion-proof aluminum sheet (3) facing away from the connecting aluminum sheet (2), and the outer periphery of the connecting steel cap (5) is enveloped by the outer periphery of the folded explosion-proof aluminum sheet (3).

5. The spiral welded combined cap according to claim 4, characterized in that: It also includes a sealing member (6), which is enclosed around the periphery of the connecting aluminum sheet (2), the isolating member (4), the explosion-proof aluminum sheet (3) and the connecting steel cap (5).

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