Busbar structure

Abstract

The utility model provides a busbar structure which comprises a busbar, a D-shaped surface is arranged at the bottom end of the busbar, side panels are arranged at the two ends of the busbar, through holes are formed in the two ends of the busbar, and notches are formed in the top ends of the through holes. According to the utility model, the original scheme that the tabs of the battery cell are folded by 90 degrees and welded on the upper surface of the busbar is canceled, the tabs are welded on the side surface of the busbar in parallel according to the factory state of the battery cell without bending the tabs of the battery cell, the welding surface is changed from the original upper surface of the busbar to the side surface, and the upper surface of the busbar is not used for welding, so that the welding efficiency is improved. The situation that effective welding cannot be achieved due to the fact that the size of the upper surface of the busbar is too small is avoided, the side surface with the larger size is used for welding, meanwhile, the D-shaped busbar is formed by sectional material aluminum extrusion, and the inner space can be used as a structure to be fixedly connected with the busbar support.

Description

Technical Field

[0001] The utility model relates to the field of lithium ion batteries, in particular to a busbar structure. Background Art

[0002] The battery box is a group of batteries composed of several single cells, a box body, a battery management system and related mounting structures. It has a standard battery box structure, battery box monitoring equipment, battery box connectors, battery box environmental control equipment, etc. Among them, the bus structure used for welding the tabs is an important component of the battery box.

[0003] The traditional method is to fold the battery cell tabs 90 degrees and weld them to the busbar plane. This method has certain requirements on the gap size between battery cells, which cannot be too small. When the battery cell thickness is thin, this method makes it difficult to fix the flat busbar structurally due to the small gap between the battery cells. In terms of welding technology, it is difficult to achieve effective welding due to insufficient welding width.

[0004] To this end, we propose a bus structure to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a busbar structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A busbar structure comprises a busbar, wherein a D-shaped surface is arranged at the bottom end of the busbar, side panels are arranged at both ends of the busbar, through holes are arranged at both ends of the busbar, and notches are arranged at the top ends of the through holes.

[0008] Further preferably, the D-shaped surface is connected to the D-shaped surface by welding.

[0009] Further preferably, the through hole is formed by connecting the D-shaped surface and the side panel, and the through hole is U-shaped.

[0010] Further preferably, the notch is U-shaped.

[0011] Further preferably, the notch is formed by machining.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model cancels the original scheme of folding the battery cell pole ear by 90 degrees and welding it to the upper surface of the busbar. Instead, the battery cell pole ear is not bent. The pole ear is welded to the side surface of the busbar in parallel according to the factory state of the battery cell. The welding surface is changed from the original upper surface of the busbar to the side surface. The upper surface of the busbar is not used for welding, so as to avoid the inability to effectively weld due to the small size of the upper surface of the busbar. Instead, the side surface with a larger size is used for welding. At the same time, the D-shaped busbar is formed by extrusion of aluminum profile, and the internal space can be structured to make it fixedly connected with the busbar bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the busbar structure provided by the utility model.

[0015] In the figure: 1. busbar; 2. D-shaped surface; 3. side panel; 4. through hole; 5. notch. Implementation

[0016] Reference Figure 1 A busbar 1 structure includes a busbar 1, a D-shaped surface 2 is provided at the bottom end of the busbar 1, and side panels 3 are provided at both ends of the busbar 1. In this solution, the original solution of folding the battery cell pole ear by 90 degrees and welding it to the upper surface of the busbar 1 is cancelled. The battery cell pole ear is not bent, and the pole ear is parallelly welded to the side surface of the busbar 1 according to the factory state of the battery cell. The welding surface is changed from the original upper surface of the busbar 1 to the side surface. The upper surface of the busbar 1 is not used for welding, so as to avoid the inability to effectively weld due to the small size of the upper surface of the busbar 1. Instead, the side surface with a larger size is used for welding. At the same time, the busbar 1 is formed by extrusion of aluminum profile, and the internal space can be structured to be fixedly connected with the busbar 1 bracket;

[0017] The busbar 1 is designed as follows Figure 1 The profile of the D-shaped surface 2 shown is that due to the small gap between the battery cells, the tabs are not completely perpendicular to the battery cell body and there will be a certain angle. The D-shaped surface 2 at the bottom of the busbar 1 is to make it easier to insert between the battery cells to avoid damaging the tabs of the battery cells when placing them;

[0018] The height of the panels 3 on both sides of the busbar 1 is designed to be large, so that the welding area of ​​the battery cell tabs is sufficient, which is convenient for process operation, forms effective welding, and is not prone to the phenomenon of cold welding and leaking welding, which can effectively improve safety.

[0019] Through holes 4 are provided at both ends of the bus 1, and slots 5 are provided at the tops of the through holes 4. Slots 5 are opened on both sides of the bus 1. In addition, the through holes 4 extruded from the profile can be fixed with the bracket for structural coordination, and the bracket and other fixing tools can be installed conveniently.

[0020] The D-shaped surface 2 is connected to the D-shaped surface 2 by welding. The D-shaped surface 2 is first formed into a specific curvature through a process of extruding aluminum profiles, and then the D-shaped surface 2 and the side panel 3 are welded, which can facilitate installation into a busbar 1 structure, saving time and effort.

[0021] The through hole 4 is formed by connecting the D-shaped surface 2 and the side panel 3. The through hole 4 is U-shaped. The U-shaped through hole 4 can play a positioning role, and a bracket or other fixing tooling can be conveniently installed at the through hole 4, or it can play a positioning role when using a robotic arm to install the bus 1, thereby facilitating the installation of the bus 1.

[0022] The slot 5 is U-shaped, and the U-shaped slot 5 can play a positioning role. A bracket or other fixing tooling can be conveniently installed at the slot 5, or it can play a positioning role when the bus 1 is installed using a robotic arm, thereby facilitating the installation of the bus 1. The slot 5 is formed by mechanical processing, specifically by laser cutting, so that no burrs will appear at the slot 5, and it is not easy to scratch the installer.

Claims

1. A busbar structure, comprising a busbar, characterized in that: The bottom end of the busbar is provided with a D-shaped surface, the two ends of the busbar are provided with side panels, the two ends of the busbar are provided with through holes, and the top ends of the through holes are provided with notches.

2. A busbar structure according to claim 1, characterized in that: The D-shaped surface is connected to the D-shaped surface by welding.

3. A busbar structure according to claim 1, characterized in that: The through hole is formed by connecting the D-shaped surface and the side panel, and the through hole is U-shaped.

4. A busbar structure according to claim 1, characterized in that: The notch is U-shaped.

5. The busbar structure according to claim 1, characterized in that: The notch is formed by machining.

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