A foldable negative electrode busbar

Abstract

This utility model belongs to the field of battery cell busbars, and in particular, a foldable negative electrode busbar. Addressing the problem that existing busbars are mostly thin sheets, easily bent and deformed, affecting welding to the electrode tabs, causing issues such as pressure on the core and pulling on the welding wires, impacting product quality and increasing production costs, this utility model proposes the following solution: a busbar disk; four negative electrode welding bosses, which are evenly spaced and fixedly connected to the top of the busbar disk. This utility model, while ensuring product performance requirements, solves the problem of deformation caused by insufficient strength in existing busbars and unstable yield rates after welding with the steel shell containing the bosses. It also increases the current-carrying area, reduces internal resistance, and effectively improves product performance.

Description

Technical Field

[0001] This utility model relates to the field of battery cell busbar technology, and in particular to a folded negative electrode busbar. Background Technology

[0002] Busbars are an integral part of a battery's structure, primarily functioning to collect current from the core tabs. As they are used in battery manufacturing processes, their structure significantly impacts both the manufacturing process and battery safety. Existing busbars are mostly thin sheets, prone to bending and deformation, affecting welding to the tabs and causing issues such as pressure on the core, pulling on the solder lines, impacting product quality, and increasing production costs. Therefore, we propose a folded negative electrode busbar to address these problems. Utility Model Content

[0003] Based on the technical problems existing in the background technology, this application proposes a folded negative electrode busbar.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A folded negative electrode busbar, comprising

[0006] Busbar;

[0007] The negative electrode welding boss has four protrusions, which are fixedly connected to the top of the busbar at equal intervals.

[0008] As a preferred embodiment of this utility model, the top of the manifold is provided with a steel shell welding groove, and the steel shell welding groove is annular.

[0009] As a preferred embodiment of this utility model, the top of the manifold is provided with a concentric positioning truncated cone.

[0010] As a preferred embodiment of this utility model, the top of each of the four negative electrode welding protrusions is provided with negative electrode welding embossing.

[0011] As a preferred embodiment of this utility model, the manifold has a hollow structure, and tension release holes are symmetrically and evenly spaced on the inner wall of the manifold, and the tension release holes are arranged in a ring. Beneficial effects

[0012] This invention, while ensuring product performance requirements, solves the problems of deformation caused by insufficient strength of the original busbar and unstable yield caused by welding with a steel shell containing bosses. It increases the flow area, reduces internal resistance, and effectively improves product performance. Attached Figure Description

[0013] Figure 1This is a perspective view of the present invention.

[0014] In the diagram: 1. Busbar; 2. Negative electrode welding boss; 3. Steel shell welding groove; 4. Concentric positioning cone; 5. Negative electrode welding embossing; 6. Tension release hole. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0016] Reference Figure 1 A foldable negative electrode busbar, comprising

[0017] Busbar 1;

[0018] The negative electrode welding boss 2 is provided. There are four negative electrode welding bosses 2, which are fixedly connected to the top of the busbar 1 at equal intervals.

[0019] As a preferred embodiment of this utility model, the top of the manifold 1 is provided with a steel shell welding groove 3, and the steel shell welding groove 3 is annular. The steel shell welding groove 3 facilitates bottom laser penetration welding. While retaining a large spacing welding space, the groove effectively enhances the strength of the manifold 1.

[0020] As a preferred embodiment of this utility model, the top of the manifold 1 is provided with a concentric positioning cone 4, which facilitates alignment with the core concentricity detection.

[0021] As a preferred embodiment of this utility model, the top of each of the four negative electrode welding protrusions 2 is provided with negative electrode welding embossing 5, which makes it fit the negative electrode tab better and achieves the best welding effect.

[0022] As a preferred embodiment of this utility model, the manifold 1 has a hollow structure, and tension relief holes 6 are symmetrically and evenly spaced on the inner wall of the manifold 1. The tension relief holes 6 are arranged in a ring, and the internal stress of the manifold 1 can be effectively reduced through the tension relief holes 6.

[0023] The working principle of this utility model is as follows: A concentric positioning cone 4 is designed at the center of the circumference of the busbar 1 for alignment with the concentricity detection of the core. A steel shell welding groove 3 is designed on the outer edge of the circumference for bottom laser penetration welding. While maintaining a large spacing welding space, the groove effectively enhances the strength of the busbar 1. A negative electrode welding boss 2 and a tension release hole 6 are designed between the steel shell welding groove 3 and the concentric positioning cone 4 for welding between the core and the busbar 1. At the same time, the tension release hole 6 effectively reduces the internal stress of the busbar 1. A negative electrode welding embossing 5 is designed on the negative electrode welding boss 2 to make it fit the negative electrode tab better and achieve the best welding effect.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A folding type negative busbar, characterized by, include Busbar (1); The negative electrode welding protrusion (2) is four in number. The four negative electrode welding protrusions (2) are fixedly connected to the top of the manifold (1) at equal intervals. The top of the manifold (1) is provided with a steel shell welding groove (3), and the steel shell welding groove (3) is annular. The manifold (1) is a hollow structure. The inner wall of the manifold (1) is provided with tension release holes (6) at equal intervals and symmetrically arranged in annular pattern.

2. The folding negative busbar according to claim 1, characterized in that, The top of the manifold (1) is provided with a concentric positioning truncated cone (4).

3. The folding negative busbar according to claim 1, characterized in that, The top of each of the four negative electrode welding bosses (2) is provided with negative electrode welding embossing (5).

Images