A busbar module structure with bottom bracket

Abstract

The utility model provides a busbar module structure with a bottom support, including a battery module, the battery module including a plurality of single battery cells, the plurality of single battery cells are horizontally stacked to form a battery module, pole ears are arranged at both ends of the plurality of single battery cells, a busbar is arranged on one side of the pole ears, the cross section of the busbar is in a D shape, a bracket male head is arranged on one side of the busbar, and a bracket female head is arranged on the side of the busbar opposite to the bracket male head; in the utility model, the upper surface of the busbar is no longer used for welding, and the side of the busbar is used for welding to provide a sufficient welding width, the bracket no longer adopts the traditional flat plate structure, and is designed as a spliced ​​plug-in structure, and a convex block and a groove are plugged in the middle of the busbar to fix the busbar, and through holes and notches are respectively opened on the bracket and the busbar, which is convenient for automated equipment to grab and fix the busbar, thereby realizing automated welding.

Description

Technical Field

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

[0002] A battery box is a grouped battery composed of a number of single - cell batteries, a box body, a battery management system and related installation structural parts, etc., and has a battery box structure, battery box monitoring equipment, battery box connectors, battery box environmental control equipment, etc. that meet the standards. Existing battery box bodies usually integrate a cooling and heat dissipation structure, and the inside of the battery box is usually composed of multiple modules.

[0003] Traditional busbars for soft - pack power batteries usually adopt a flat shape, and the contour dimensions vary with different modules. During assembly, they are generally fixed on a plastic bracket first, using the plastic bracket for support and insulation, and the electrode tabs of the battery cells are bent and attached to the busbar before laser welding and subsequent welding of the collection wires can be achieved. The welding direction is perpendicular to the surface of the busbar, that is, parallel to the length direction of the battery cells.

[0004] For traditional soft - pack module electrode tabs connected to each other, a flat - type busbar is used. The busbar requires a complex plastic bracket for welding support and insulation isolation. This bracket is an essential part. In the prior art, the installation of the bracket during welding is relatively complex, and the electrode tabs of the battery cells need to be bent 90 degrees to fit the busbar for welding. The laser welding direction is parallel to the extending direction of the electrode tabs of the battery cells and cannot be directly perpendicular to the surface of the electrode tabs for welding.

[0005] Therefore, we propose a busbar module structure with a bottom support to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose a busbar module structure with a bottom support.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A busbar module structure with a bottom support includes a battery module. The battery module includes a plurality of single - cell battery cells. The plurality of single - cell battery cells are horizontally placed to form a battery module. Both ends of the plurality of single - cell battery cells are provided with electrode tabs. A busbar is provided on one side of each electrode tab. The cross - section of the busbar is in a shape of a Chinese character 'hui' (回), and a bottom support is provided at one section of the busbar.

[0009] Further preferably, a collection wire is provided at the top of one end of the battery module, and the collection wire is attached to the single - cell battery cells.

[0010] Further preferably, the busbar is arranged between every two adjacent single - cell battery cells.

[0011] Further preferably, one end of each of the collecting wires is connected to a bottom support provided on the bus bar.

[0012] Further preferably, the distances between the bus bars are all the same, and the bottom supports are all located on the side of the bus bar adjacent to the collecting wires.

[0013] Further preferably, a looped row is provided inside the bus bar, and the distances between the looped rows are the same.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] In the present utility model, the bus bar does not require a complex plastic bracket for welding support and insulation isolation. This bracket is not an essential part, and the installation during welding is relatively simple. Moreover, the cell tab does not need to be bent by 90 degrees to fit and weld with the bus bar. The laser welding direction is parallel to the extending direction of the cell tab, and it can directly weld perpendicular to the surface of the cell tab. At the same time, the collecting wire can also be conveniently welded to the bottom support on the bus bar, which is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a battery module provided by the present utility model;

[0017] Figure 2 is Figure 1 an enlarged schematic view of the structure at A in

[0018] In the figure: 1, battery module; 2, single cell; 3, bus bar; 4, collecting wire; 5, tab;

[0019] 6, looped row; 7, bottom support. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Referring to Figure 1-2 , a bus bar module structure with a bottom support includes a battery module. The battery module includes a plurality of single cells. The plurality of single cells are horizontally arranged to form a battery module. Both ends of the plurality of single cells are provided with tabs. A bus bar is provided on one side of each tab. The cross-section of the bus bar is in the shape of a reversed 'C'. A bottom support is provided at one end of the bus bar.

[0021] The bus bar does not require a complex plastic bracket for welding support and insulation isolation. This bracket is not an essential part, and the installation during welding is relatively simple. Moreover, the cell tab does not need to be bent by 90 degrees to fit and weld with the bus bar. The laser welding direction is parallel to the extending direction of the cell tab, and it can directly weld perpendicular to the surface of the cell tab. At the same time, the collecting wire can also be conveniently welded to the bottom support on the bus bar, which is relatively convenient

[0022] A collection line is provided on the top of one end of the battery module, and the collection line is attached to the single battery cell. The battery cell current can be input and output through the collection line.

[0023] The busbar is arranged between every two adjacent single cells, so that the installation of the busbar can save space and effectively improve the space utilization rate of the battery pack.

[0024] One end of the collection line is connected to the bottom bracket provided on the bus bar, and the bottom bracket can support the bus bar at the bottom end, which can effectively improve the stability of the bus bar.

[0025] The spacing between the bus bars is consistent, so the stability of the bus bars is improved, which can effectively improve the stability inside the battery pack. The base is located on the side of the bus bar adjacent to the collection line, which is convenient for connecting the bus bar and the collection line. The spacing between the circular bars is consistent, which can effectively improve the stability of the battery pack.

Claims

1. A busbar module structure with a bottom bracket, comprising a battery module, wherein the battery module comprises a plurality of single cells, wherein the plurality of single cells are horizontally placed to form a battery module, and both ends of the plurality of single cells are provided with tabs, wherein: A bus bar is provided on one side of each tab. The cross-section of the bus bar is in the shape of a Chinese character 'hui' (回). A bottom support is provided at one end of the bus bar.

2. A busbar module structure with a bottom support according to claim 1, characterized in that: A collecting wire is provided at the top of one end of the battery module, and the collecting wire is attached to the single cell.

3. The busbar module structure with a bottom support according to claim 1, characterized in that: The bus bar is arranged between every two adjacent single cells.

4. A busbar module structure with a bottom support according to claim 2, characterized in that: One end of each collecting wire is connected to the bottom support provided on the bus bar.

5. The busbar module structure with a bottom support according to claim 2, characterized in that: The distances between the bus bars are all the same, and the bottom supports are all located on the side of the bus bar adjacent to the collecting wire.

6. The busbar module structure with a bottom support according to claim 1, characterized in that: A loop-shaped row is provided inside the bus bar, and the distances between the loop-shaped rows are the same.

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