Efficient welding assembly for battery module of electric vehicle

Abstract

The utility model discloses a high-efficiency welding assembly for a battery module of an electric vehicle, which comprises an aluminum row arranged in each welding die position and used for being welded on a positive electrode of a battery, a negative electrode welding area used for being welded on a negative electrode of an adjacent battery and a middle area, and a signal line, a metal connecting piece is arranged at the bottom of the middle area of the aluminum bar, the metal connecting piece is connected with the signal line at the position, connected with the signal line, of each welding die position, and one end of the metal connecting piece is connected with the negative electrode of the battery in the welding die position. Compared with the prior art, the problem that an existing electric automobile battery module is high in welding cost can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle manufacturing, in particular to a component that can be efficiently welded on an electric vehicle battery module. Background Art

[0002] New energy vehicles (i.e., electric vehicles) have quickly entered ordinary people's families, and people's pursuit of high cruising range is constantly increasing. The high cruising range mainly depends on the increase in the number of batteries in the battery pack. The battery pack is formed by laser welding multiple batteries in multiple rows with multiple batteries in each row.

[0003] The existing electric vehicle battery module includes multiple welding die positions in multiple rows on a template. There are ribs around each welding die position. Each welding die position can weld the positive electrode at the upper end of each battery to the negative electrode at the upper end of the adjacent battery through an aluminum row. The aluminum row includes a positive electrode welding area for welding on the positive electrode of the battery, a negative electrode welding area for welding on the negative electrode of the adjacent battery, and an intermediate area. There is a housing at the lower part of the template. The housing has a vertically arranged cylinder for placing the battery. There is an upper cover with holes on each welding die position at the upper part of the template.

[0004] During welding, first weld the aluminum row on two adjacent batteries at each welding die position, and then weld the signal wire at each welding die position. In this way, welding needs to be carried out twice and two sets of welding equipment are required, so the processing cost of the battery pack is not low.

[0005] In order not to transfer the high-cost battery to consumers, we must continuously improve the product assembly method, reduce the process steps, and improve the production efficiency to reduce the processing cost. Summary of the Utility Model

[0006] The problem to be solved by the utility model is to provide an efficient welding component for an electric vehicle battery module to solve the problem of high welding cost of the existing electric vehicle battery module.

[0007] To solve the above problems, the technical solution of the utility model is: The efficient welding component for the electric vehicle battery module includes an aluminum row with a positive electrode welding area for welding on the positive electrode of the battery, a negative electrode welding area for welding on the negative electrode of the adjacent battery, and an intermediate area provided in each welding die position, and also includes a signal wire. A metal connecting piece is provided at the bottom of the intermediate area of the aluminum row. The metal connecting piece connects the signal wire at the position where each welding die position connects the signal wire, and one end of the metal connecting piece connects the negative electrode of the battery in the welding die position.

[0008] In the above technical solution, a more specific solution may be: A positioning post for upwardly passing through the metal connecting piece is provided in each welding die position.

[0009] Further: Each of the welding die positions is provided with a limit guide groove for restricting the horizontal rotation of the metal connecting piece.

[0010] Further: The position where the middle area of the aluminum row is connected to the metal connecting piece arches upward to form a receiving cavity for receiving the metal connecting piece.

[0011] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0012] In this high-efficiency welding assembly for an electric vehicle battery module, a metal connecting piece for connecting the battery negative electrode and the signal wire is arranged below the aluminum row. The position of the metal connecting piece is positioned by positioning posts, and the horizontal inclination angle of the metal connecting piece is limited by a limit guide groove. Only by adding a welding head for welding the metal connecting piece and the signal wire to the welding equipment for welding the aluminum row, the signal wire can be welded to the metal connecting piece while welding the aluminum row. One welding can achieve the welding of the aluminum rows of the battery positive and negative electrodes and the welding of the signal wire. The two weldings are optimized into one welding, which not only reduces the energy consumption and labor of one welding, but also saves a set of welding equipment, reduces the manufacturing cost, reduces the cost for consumers, and enables the rapid popularization and promotion of new energy vehicles. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the battery module according to an embodiment of the utility model;

[0014] Figure 2 is Figure 1 an enlarged view of part A of

[0015] Reference numerals in the drawings: template 1, rib 1-1, housing 2, cylinder 2-1, aluminum row 3, negative electrode welding area 3-1, positive electrode welding area 3-2, middle area 3-3, receiving cavity 3-4, metal connecting piece 4, battery negative electrode 5, signal wire 6, wire harness box 7, positioning post 8, limit guide groove 9. Detailed Embodiment

[0016] The following further details the embodiments of the utility model with reference to the drawings:

[0017] As Figure 1 shown in the electric vehicle battery module, including multiple rows of multiple welding die positions on the template 1, with ribs 1-1 provided around each welding die position. Each welding die position can weld the positive electrode of the upper end of each battery to the negative electrode 5 of the upper end of the adjacent battery through the aluminum row 3. The housing 2 is provided with a vertically arranged cylinder 2-1 for placing the battery.

[0018] As Figure 2The efficient welding component of the electric vehicle battery module shown includes an aluminum busbar with a positive electrode welding area 3-2 for welding to the positive electrode of the battery, a negative electrode welding area 3-1 for welding to the negative electrode of an adjacent battery, and an intermediate area 3-3, within each welding die position. It also includes a signal line 6. A metal connecting piece 4 is provided at the bottom of the intermediate area of the aluminum busbar. The metal connecting piece 4 connects the signal line 6 at the position where each welding die position is connected to the signal line. One end of the metal connecting piece 4 is connected to the battery negative electrode 5 within the welding die position, and the other end of the signal line 6 is connected to the metal connecting piece 4. A positioning post 8 for passing upward through the metal connecting piece is provided within each welding die position, and a limiting guide groove 9 for restricting the horizontal rotation of the metal connecting piece is provided within each welding die position. The position where the intermediate area of the aluminum busbar is connected to the metal connecting piece arches upward to form a receiving cavity 3-4 for receiving the metal connecting piece. The signal line 6 within each welding die position forms a signal wire harness after extending out of the welding die position and is arranged within a wire harness box 7.

[0019] By arranging a metal connecting piece that connects the battery negative electrode and the signal line under the aluminum busbar in this efficient welding component of the electric vehicle battery module, positioning the metal connecting piece through the positioning post, and restricting the horizontal inclination angle of the metal connecting piece through the limiting guide groove, only by adding a welding head for welding the metal connecting piece and the signal line to the welding equipment for welding the aluminum busbar, the signal line can be welded to the metal connecting piece while welding the aluminum busbar. The welding of the aluminum busbars at the positive and negative electrodes of the battery and the welding of the signal line can be achieved in one welding, optimizing the two weldings into one welding. This not only reduces the energy consumption and labor for one welding, but also saves a set of welding equipment, reducing the manufacturing cost, lowering the cost for consumers, and enabling the rapid popularization and promotion of new energy vehicles.

Claims

1. An efficient welding component for an electric vehicle battery module, including a positive electrode welding area provided in each welding die position for welding to the positive electrode of the battery, a negative electrode welding area for welding to the negative electrode of an adjacent battery, and an aluminum busbar in the middle area, and further including a signal line, characterized in that: A metal connecting piece is provided at the bottom of the middle region of the aluminum row, and the metal connecting piece connects the signal line at the position where each welding die position connects the signal line, and one end of the metal connecting piece connects the negative electrode of the battery in the welding die position.

2. The high-efficiency welding assembly for an electric vehicle battery module according to claim 1, wherein: Each welding die position is provided with a positioning post for passing upward through the metal connecting piece.

3. The high-efficiency welding assembly for an electric vehicle battery module according to claim 1 or 2, characterized in that: Each welding die position is provided with a limiting guide groove for restricting the horizontal rotation of the metal connecting piece.

4. The high-efficiency welding assembly for an electric vehicle battery module according to claim 1 or 2, characterized in that: The position where the middle region of the aluminum row connects the metal connecting piece arches upward to form a receiving cavity for receiving the metal connecting piece.

5. The high-efficiency welding assembly for an electric vehicle battery module according to claim 3, wherein: The position where the middle region of the aluminum row connects the metal connecting piece arches upward to form a receiving cavity for receiving the metal connecting piece.

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