Convergence disc capable of improving liquid injection and welding yield

Abstract

The utility model discloses a confluence plate capable of improving liquid injection and welding yield, which comprises a confluence plate main body, the confluence plate main body is of a circular structure, the confluence plate main body is provided with a welding area, the welding area is cross-shaped, and one side of the welding area, which is opposite to the confluence plate main body, is concave inwards. According to the utility model, the welding area of the cathode collector plate is the central cross area, and the convex surface is aligned with one side of the cathode of the battery cell, so that the tightness of a contact surface is increased, and the problem of poor welding caused by holes in contact is solved; round holes with different sizes are formed in the four non-welding areas, and the concave surfaces are aligned to one side of the negative electrode of the battery cell; electrolyte can flow into the surface of the battery cell along the round holes during electrolyte injection, so that the problem of electrolyte residue on the surface of the confluence plate is solved; and the non-welding area and the surface of the battery cell form a liquid retaining area, so that the risk that the vacuumizing electrolyte is pumped out in the liquid injection process is relieved, and the liquid injection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery manifold technology, specifically a manifold that improves the yield rate of electrolyte injection and welding. Background Technology

[0002] A cylindrical battery includes a casing, electrode assembly, negative current collector, and negative electrode cover. The casing provides a cavity for housing the electrode assembly, which is used to store and release energy. The negative current collector conducts the energy of the electrode assembly to the outside.

[0003] Currently, positive electrode manifolds are generally produced using resistance welding or laser welding, but these methods are still limited by the contact area between the manifold and the housing, and the welding yield cannot be improved. Therefore, we propose a manifold design that improves both the liquid injection and welding yield. Utility Model Content

[0004] The purpose of this invention is to provide a manifold that improves the yield of liquid injection and welding, thereby solving the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a manifold for improving the yield of liquid injection and welding, comprising a manifold body, the manifold body having a circular structure, the manifold body having a welding area, the welding area having a cross shape, and the welding area being concave on one side relative to the manifold body.

[0006] Preferably, the welding area divides the main body of the manifold into four regions, each region having multiple through holes.

[0007] Preferably, each area of ​​the main body of the manifold is provided with two through holes, the through holes being circular holes, and the diameter of the inner through hole being smaller than the diameter of the outer through hole.

[0008] Preferably, an outer ring is provided on the outer side of the main body of the busbar.

[0009] Preferably, the main body of the manifold is provided with an inner ring at the center of the welding area.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The main body of the busbar has a welding area in the shape of a cross. The welding area is concave on one side relative to the main body of the busbar. The welding area of ​​the negative current collector is the central cross area, and the convex side is aligned with the negative electrode side of the battery cell. This increases the tightness of the contact surface and reduces welding defects caused by gaps in the contact.

[0012] Each area of ​​the main body of the busbar has two through holes, which are circular holes with the inner through hole having a smaller diameter than the outer through hole. There are circular holes of different sizes in the four non-welded areas, with the concave side facing the negative electrode side of the battery cell. During electrolyte injection, the electrolyte can flow into the surface of the battery cell through the circular holes, reducing the problem of electrolyte residue on the surface of the busbar. The non-welded areas and the surface of the battery cell form a "liquid-retaining zone", which reduces the risk of electrolyte being extracted during the vacuuming process and improves the injection efficiency. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a structural schematic diagram of the present invention from the rear view.

[0016] Figure 3 This is the front view of this utility model.

[0017] In the diagram: 1. Main body of the busbar; 2. Through hole; 3. Welding area; 4. Inner ring; 5. Outer ring. Detailed Implementation

[0018] 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, 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. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0019] Please see Figure 1-3In this embodiment of the utility model, a manifold for improving the yield of liquid injection and welding includes a manifold body 1, which is circular in structure. The manifold body 1 is provided with a welding area 3, which is cross-shaped. The welding area 3 is concave on one side relative to the manifold body 1 and convex on the other side relative to the manifold body 1. The welding area of ​​the negative electrode current collector is the central cross-shaped area, and the convex side is aligned with the negative electrode side of the battery cell, which increases the tightness of the contact surface and reduces welding defects caused by gaps in the contact.

[0020] The welding area 3 divides the main body 1 of the busbar into four areas, each of which is provided with multiple through holes 2. Each area of ​​the main body 1 of the busbar has two through holes 2, which are circular holes with the inner through hole 2 having a smaller diameter than the outer through hole 2. There are circular holes of different sizes in the four non-welding areas, with the concave side facing the negative electrode side of the battery cell. During the electrolyte injection process, the electrolyte can flow into the surface of the battery cell through the circular holes, reducing the problem of electrolyte residue on the surface of the busbar. The non-welding area and the surface of the battery cell form a "liquid retention area", which reduces the risk of electrolyte being extracted during the vacuuming process and improves the electrolyte injection efficiency.

[0021] An outer ring 5 is provided on the outer side of the main body 1 of the manifold, and an inner ring 4 is provided at the center of the welding area 3 of the main body 1 of the manifold. The ring design has the functions of retaining electrolyte and providing sidewall welding.

[0022] The working principle of this utility model is as follows: The main body 1 of the busbar is provided with a welding area 3. The welding area 3 is cross-shaped. The welding area 3 is concave on one side relative to the main body 1 of the busbar and convex on the other side relative to the main body 1 of the busbar. The welding area of ​​the negative electrode current collector is the central cross area, and the convex side is aligned with the negative electrode side of the battery cell, which increases the tightness of the contact surface and reduces the welding defects caused by the presence of gaps in the contact.

[0023] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A manifold for improving the yield of liquid injection and welding, comprising a manifold body (1), characterized in that: The main body (1) of the busbar is circular. The main body (1) of the busbar is provided with a welding area (3). The welding area (3) is cross-shaped and is concave on one side relative to the main body (1).

2. The manifold for improving fluid injection and welding yield according to claim 1, characterized in that: The welding area (3) divides the main body (1) of the manifold into four areas, each of which is provided with multiple through holes (2).

3. The manifold for improving fluid injection and welding yield according to claim 2, characterized in that: Each region of the main body (1) of the manifold is provided with two through holes (2). The through holes (2) are round holes, and the diameter of the inner through hole (2) is smaller than the diameter of the outer through hole (2).

4. The manifold for improving fluid injection and welding yield according to claim 1, characterized in that: An outer ring (5) is provided on the outside of the main body (1) of the busbar.

5. The manifold for improving fluid injection and welding yield according to claim 1, characterized in that: The main body (1) of the busbar is provided with an inner ring (4) at the center of the welding area (3).

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