Electric busbar laser welding tool
By setting a positioning member in the welding mold position and setting a positioning part of a nested positioning member on the busbar, the problems of the busbar being easily moved horizontally and short-circuited and ignited in the prior art are solved, and higher welding quality and safety are achieved.
Patent Information
- Application Number
- CN202421315104.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The existing electrical bus welding auxiliary equipment is incomplete, which leads to the bus being easily moved horizontally and there is a risk of short circuit and ignition.
Positioning parts are provided in the welding mold position, and positioning parts of nested locators are provided on the busbar to fix the position of the busbar by mechanical connection.
It effectively avoids the lateral movement of the busbar caused by battery sinking, limits the movement of the busbar, eliminates the risk of ignition, and improves the welding quality.
Smart Images
Figure CN222643499U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric vehicle manufacturing, in particular to an auxiliary device for connecting batteries into a battery pack through laser welding of a bus bar. Background Art
[0002] There is a battery pack for electric vehicles, which includes a plurality of batteries 1 arranged side by side, and the positive electrode 1-2 of each battery is connected in series with the negative electrode 1-1 of the adjacent battery through the bus 2 thereon, such as the positive electrode of the first battery is connected to the negative electrode of the second battery, the positive electrode of the second battery is connected to the negative electrode of the third battery, and so on. The middle raised part of the upper end of the battery 1 is the negative electrode 1-1, and the non-raised parts around the negative electrode are all positive electrodes 1-2 except for the part equipped with the explosion-proof valve 1-3. Figure 1 .
[0003] The existing battery pack is connected by laser welding, and the welding auxiliary equipment such as Figure 2 As shown, at least one row of welding positions on the template 3 is included, and welding positions for placing busbars 2 are arranged side by side and surrounded by ribs 3-4 on each welding position group. A busbar 2 can be placed in each welding position, and the busbar 2 includes a positive electrode welding area 2-1 and a negative electrode welding area 2-2 on the left and right sides. A cylinder 3-3 for vertically placing batteries 1 is provided under the positive electrode welding area of the busbar in each welding position and the negative electrode welding area of the busbar in an adjacent position. The negative electrode welding area 2-1 and the positive electrode welding area 2-2 of each busbar span the two cylinders and overlap the negative electrode 1-1 of a battery and the positive electrode 1-2 of an adjacent battery. During welding, the ribs 3-4 constrain the position of the busbar 2, and the laser welding guns in the positive electrode welding area and the laser welding guns in the negative electrode welding area are pressed down at the same time, and the busbar 2 on each welding position is welded to the positive and negative electrodes of the two batteries 1 at the same time. The template 3 consists of a lower shell 3-1 and an upper cover 3-2. The lower shell 3-1 has a vertically arranged cylinder 3-3 for placing the battery, and the upper cover 3-2 has ribs 3-4. Due to the flatness tolerance at the bottom of the cylinder 3-4 of the lower shell, the battery 1 may sink during the actual installation process, resulting in a gap between the upper cover 3-2 and the upper surface of the battery 2, causing the bus 2 to tilt and loosen in the welding mold position. The bus 2 will move toward the positive electrode welding area, and there is a risk of short circuit and sparking due to the contact between the negative electrode welding area of the bus and the positive electrode of the battery. Human intervention is required in the position of the bus to ensure the welding quality. Utility Model Content
[0004] The problem to be solved by the utility model is to provide an electrical busbar laser welding tool to solve the problems that the existing electrical busbar welding auxiliary equipment has an imperfect structure, the busbar is easy to move horizontally, and there is a risk of short circuit and sparking.
[0005] In order to solve the above problems, the technical solution of the utility model is: the electrical bus laser welding tooling includes at least one row of welding mold position groups on the template, each group of the welding mold position groups are arranged side by side and surrounded by ribs for placing the bus welding mold position, the bus includes a positive electrode welding area overlapping the positive electrode of a battery and a negative electrode welding area overlapping the negative electrode of an adjacent battery, under the bus positive electrode welding area of each welding mold position and the negative electrode welding area of the bus of an adjacent welding mold position is provided with a cylinder for uprightly placing the battery, the welding mold is provided with a positioning piece at a position on one side of the bus, and the bus is provided with a positioning portion for nesting the positioning piece.
[0006] In the above technical solution, a more specific solution may be: the positioning member is a cylinder.
[0007] Furthermore: the positioning portion of the bus is a protrusion protruding outward from the side of the bus, and the protrusion is provided with a through hole for nesting the positioning piece.
[0008] Furthermore: the protrusion of the busbar is a square protrusion.
[0009] Further: the square protrusion of the busbar is located on the inner side of the rib of the welding mold position.
[0010] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:
[0011] This electrical busbar laser welding tool can avoid the phenomenon of the busbar moving horizontally toward the positive electrode due to the sinking of the battery by setting a positioning piece next to the busbar in the welding mold and setting a positioning part of the nested positioning piece on the busbar, effectively limiting the movement of the busbar and eliminating the risk of ignition. The positioning piece is designed as a cylinder, which can better facilitate horizontal positioning; the busbar is directly added with a positioning part of the nested positioning piece, which increases the reliability and stability of the mechanical connection compared to adding other connecting parts. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is an axonometric view of a portion of the battery pack;
[0013] Figure 2 It is an axonometric view of an embodiment of the utility model;
[0014] Figure 3 yes Figure 2 A magnified image of point A;
[0015] Symbols in the figure: battery 1, negative electrode 1-1, positive electrode 1-2, bus 2, negative electrode welding area 2-1, positive electrode welding area 2-2, positioning part 2-3, template 3, lower shell 3-1, upper cover 3-2, cylinder 3-3, rib 3-4, positioning piece 3-5. DETAILED DESCRIPTION
[0016] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:
[0017] like Figure 2 , Figure 3 The electrical bus laser welding tool shown includes at least one row of welding mold positions on a template 3, each welding mold position group is arranged side by side and surrounded by ribs 3-4 for placing the bus 2, the bus 2 includes a negative electrode welding area 2-1 overlapping the negative electrode 1-1 of a battery and a positive electrode welding area 2-2 overlapping the positive electrode 1-2 of an adjacent battery, and a cylinder 3-3 for uprightly placing the battery is provided under the bus positive electrode welding area of each welding mold position and the bus negative electrode welding area of an adjacent welding mold position, the template 3 includes a lower shell 3-1 and an upper cover 3-2, the lower shell 3-1 has an upright cylinder 3-3 for placing the battery, and the upper cover has ribs 3-4.
[0018] The welding mold is provided with a positioning piece 3-5 at a position on one side of the bus 2. The positioning piece 3-5 is a cylinder. The positioning piece 3-5 is designed as a cylinder, which can better facilitate horizontal positioning. The bus 2 is provided with a positioning portion 2-3 for nesting the positioning piece 3-5. The positioning portion 2-3 of the bus 2 is a protrusion protruding outward from the side of the bus, and the protrusion is provided with a through hole for nesting the positioning piece 3-5. The protrusion of the bus is a square protrusion, which can effectively prevent the lateral movement of the bus compared to the round protrusion. The square protrusion of the bus is located on the inner side of the rib 3-4 of the welding mold position. The bus 2 directly adds the positioning portion 2-3 of the nested positioning piece, which increases the reliability and stability of the mechanical connection compared to adding other connecting components.
[0019] The electrical bus laser welding tooling can avoid the phenomenon that the negative electrode welding area of the bus 2 moves laterally toward the positive electrode due to the sinking of the battery 1 by arranging the locating piece 3-5 beside the bus 2 in the welding mold position and arranging the locating portion 2-3 of the nested locating piece on the bus 2, thereby effectively limiting the movement of the bus and eliminating the risk of ignition.
Claims
1. An electrical busbar laser welding tool, comprising at least one row of welding die positions on a template, each of which is provided with welding die positions for placing a busbar and surrounded by ribs, wherein the busbar comprises a positive electrode welding area overlapped with the positive electrode of a battery and a negative electrode welding area overlapped with the negative electrode of an adjacent battery, and a cylinder for vertically placing the battery is provided under the busbar positive electrode welding area of each welding die position and the busbar negative electrode welding area of an adjacent welding die position, characterized in that: The welding mold is provided with a positioning piece at a position on one side of the busbar, and the busbar is provided with a positioning portion for nesting the positioning piece.
2. The electrical busbar laser welding tool according to claim 1, characterized in that: The positioning member is a cylinder.
3. The electrical busbar laser welding tool according to claim 1 or 2, characterized in that: The positioning portion of the busbar is a protrusion protruding outward from the side of the busbar, and a through hole for embedding the positioning piece is provided on the protrusion.
4. The electrical busbar laser welding tool according to claim 3, characterized in that: The protrusions of the busbar are square protrusions.
5. The electrical busbar laser welding tool according to claim 4, characterized in that: The square protrusion of the busbar is located inside the rib of the welding mold position.