Battery bottom structure facilitating laser welding

Abstract

The utility model discloses a battery bottom structure convenient to laser welding relates to battery welding technical field, including work table, the top of work table is provided with battery device, the top of battery device is provided with welding plate mechanism, battery device includes battery body, and the top of work table is movably connected to battery body. The utility model discloses the cooperation of work table, battery device, battery device, annular heat dissipation fin, battery welding, welding plate positioning hole, laser vision positioning block, place battery device on the work table, install and position through welding plate positioning hole to welding plate body, utilize laser welding device and carry out welding, through scanning laser vision positioning block when welding, carry out accurate positioning welding, utilize annular heat dissipation fin and carry out heat dissipation when welding, guarantee the convenience when laser welding at the same time, have heat dissipation and accuracy, and the welding quality and cost loss are greatly guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of battery welding technology, specifically to a battery bottom structure that is easy to laser weld. Background Technology

[0002] Laser welding at the bottom of the battery pack is a critical process that balances sealing and strength. Its process window directly determines the safe lifespan of the entire pack. Traditional bottom shells are made of flat aluminum profiles, and the weld seams are easily affected by fluctuations in the incoming material gap. Uneven heat input can easily lead to spatter and undercut. Subsequent repair welding not only reduces the cycle time but also leaves potential quality problems. With the popularization of high-nickel chemical systems, increasingly compact box structures, and increasingly stringent consistency requirements for laser welding, there is an urgent need for a new type of battery bottom structure to achieve reliable sealing and ensure that there is no risk of leakage throughout the battery's entire life cycle.

[0003] Patent publication number CN200972870Y discloses a bottom structure of a battery. The battery has a cylindrical outer shell with one end open and a bottom cover assembly that closes the outer shell. The bottom cover assembly includes at least a bottom cover and an insulating sealing ring. The end of the battery outer shell is tightly attached to the insulating sealing ring to form a seal on the battery. The bottom cover of the battery bottom structure consists of a body, a downwardly extending side wall, a connecting ring, and an outer ring. The cross-section of the outer ring is quasi-annular. The outer ring located at the edge of the bottom cover is circular, and its lower end is close to the platform surface of the insulating sealing ring.

[0004] To address the issues of poor sealing and easy leakage, existing technologies employ a bottom cover with a quasi-circular edge. This approach improves the battery's explosion-proof and leak-proof performance, increases discharge capacity, reduces storage capacity degradation, and enhances overall performance. However, this approach still presents challenges such as complex laser welding operations and poor installation and welding positioning, leading to unstable welding quality, incomplete welds, burn-through, and even poor battery sealing. Utility Model Content

[0005] The purpose of this invention is to provide a battery bottom structure that is easy to laser weld, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A battery bottom structure that facilitates laser welding includes a worktable, a battery device disposed on the top surface of the worktable, and a welding plate mechanism disposed on the top surface of the battery device.

[0007] The battery device includes a battery body, which is movably connected to the top surface of the workbench.

[0008] A further improvement of this utility model is that: a positioning and shrinking mechanism is provided on the surface of the battery body, and an annular heat dissipation fin is provided on the surface of the battery body.

[0009] A further improvement of the present invention is that: a battery welding point is fixedly connected to the top surface of the battery body, a welding plate positioning hole is opened on the top surface of the battery body and on one side of the battery welding point, and a laser vision positioning block is fixedly connected to the top surface of the battery body and on the other side of the battery welding point.

[0010] A further improvement of the present invention is that the positioning and shrinking mechanism includes an elastic shrinking ring, which is movably connected to one side of the battery body, and a limiting soft band is fixedly connected to the bottom surface of the elastic shrinking ring.

[0011] A further improvement of this utility model is that: a central positioning mounting post is fixedly connected to the surface of the limiting soft band, a central positioning plate is snapped onto the top surface of the central positioning mounting post, and the central positioning plate abuts against the top surface of the battery body.

[0012] A further improvement of this utility model is that a side positioning plate is fixedly connected to the top surface of the elastic shrink ring, and the side positioning plate abuts against one side of the battery body.

[0013] A further improvement of this utility model is that a top-pressure metal cooling plate is fixedly connected to the surface of the side positioning plate, the top-pressure metal cooling plate abuts against the top surface of the battery body, and an installation port is provided on one side of the side positioning plate.

[0014] A further improvement of the present invention is that the welding plate mechanism includes a positioning post, the positioning post is snapped onto the surface of the positioning hole of the welding plate, the top surface of the positioning post is fixedly connected to the welding plate body, and the surface of the welding plate body is provided with an extension plate.

[0015] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows: 1. This utility model provides a battery bottom structure that facilitates laser welding. It adopts a worktable, battery device, battery body, annular heat dissipation fins, battery welding joint, welding plate positioning holes, and laser vision positioning block. By placing the battery device on the worktable, the welding plate body is installed and positioned through the welding plate positioning holes, and welding is performed using a laser welding device. During welding, the laser vision positioning block is scanned for precise positioning. The annular heat dissipation fins are used for heat dissipation during welding. This design ensures both convenience and precision in laser welding, greatly protecting welding quality and reducing cost.

[0016] 2. This utility model provides a battery bottom structure that facilitates laser welding. It employs a welding plate mechanism, a positioning and shrinking mechanism, side positioning plates, an mounting port, a central positioning plate, a top-pressure metal cooling plate, an elastic shrink ring, a restrictive soft band, a central positioning mounting post, a welding plate body, a mounting extension plate, and a positioning post. By placing four battery bodies inside the positioning and shrinking mechanism, initial positioning is achieved using the elastic shrink ring, followed by shrinking using the restrictive soft band. The central positioning mounting post is then installed in the gap and engages with the central positioning plate. The top-pressure metal cooling plate presses against the top of each battery body, providing heat dissipation and fixation. This solves the positioning problem during laser welding, prevents issues such as incomplete welding, burn-through, and even poor battery sealing, and ensures the quality of the welded battery. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the battery device of this utility model; Figure 3 This is a schematic diagram of the positioning and retraction mechanism of this utility model; Figure 4 This is a schematic diagram of the welding plate mechanism of this utility model.

[0018] In the diagram: 1. Workbench; 2. Battery assembly; 3. Welding plate mechanism; 4. Battery body; 5. Annular heat dissipation fins; 6. Positioning and retraction mechanism; 7. Side positioning plate; 8. Mounting port; 9. Battery welding point; 10. Welding plate positioning hole; 11. Laser vision positioning block; 12. Central positioning plate; 13. Top pressure metal cooling plate; 14. Elastic retraction ring; 15. Restricting soft band; 16. Central positioning mounting post; 17. Welding plate body; 18. Mounting extension plate; 19. Positioning post. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to embodiments: Example 1 like Figure 1-4 As shown, this utility model provides a battery bottom structure that facilitates laser welding, including a worktable 1, a battery device 2 disposed on the top surface of the worktable 1, a welding plate mechanism 3 disposed on the top surface of the battery device 2, the battery device 2 including a battery body 4, the battery body 4 being movably connected to the top surface of the worktable 1, a positioning and retraction mechanism 6 disposed on the surface of the battery body 4, annular heat dissipation fins 5 being provided on the surface of the battery body 4, a battery welding joint 9 being fixedly connected to the top surface of the battery body 4, a welding plate positioning hole 10 being provided on the top surface of the battery body 4 and on one side of the battery welding joint 9, and a laser vision positioning block 11 being fixedly connected to the top surface of the battery body 4 and on the other side of the battery welding joint 9.

[0020] In this embodiment, after the peripheral installation is completed, the battery device 2 is placed on the workbench 1, and the welding plate body 17 is installed and positioned by the restriction of the welding plate positioning hole 10. Welding is performed using a laser welding device. During welding, the laser vision positioning block 11 is scanned for precise positioning welding. The heat generated during welding can be dissipated by the set annular heat dissipation fins 5. While ensuring the convenience of laser welding, it also has heat dissipation and precision, which greatly ensures the welding quality and cost loss.

[0021] Example 2 like Figure 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the positioning shrinkage mechanism 6 includes an elastic shrinkage ring 14, which is movably connected to one side of the battery body 4. A limiting soft band 15 is fixedly connected to the bottom surface of the elastic shrinkage ring 14, and a central positioning mounting post 16 is fixedly connected to the surface of the limiting soft band 15. A central positioning plate 12 is snapped onto the top surface of the central positioning mounting post 16, and the central positioning plate 12 abuts against the top surface of the battery body 4. A side positioning plate 7 is fixedly connected to the top surface of the elastic shrinkage ring 14, and the side positioning plate 7 abuts against one side of the battery body 4. A top-pressing metal cooling plate 13 is fixedly connected to the surface of the side positioning plate 7, and the top-pressing metal cooling plate 13 abuts against the top surface of the battery body 4. An installation opening 8 is provided on one side of the side positioning plate 7. The welding plate mechanism 3 includes a positioning post 19, which is snapped onto the surface of the welding plate positioning hole 10. A welding plate body 17 is fixedly connected to the top surface of the positioning post 19, and an installation extension plate 18 is provided on the surface of the welding plate body 17.

[0022] In this embodiment, when preparing to laser weld the battery, the four battery bodies 4 are first placed inside the positioning and shrinking mechanism 6. The elastic shrinking ring 14 is used to initially position the four battery bodies 4. Then, the limiting soft band 15 is used to shrink them again. The central positioning mounting post 16 is placed into the gap between the battery bodies 4. The central positioning mounting post 16 can be engaged with the central positioning plate to fix the battery body 4. The top metal cooling plate 13 is pressed on the top of each battery body 4 and has a heat dissipation effect. This solves the positioning problem during laser welding, prevents problems such as incomplete welding, weld penetration, or even poor battery sealing, and ensures the quality of the welded battery.

[0023] The working principle of this battery bottom structure, which is easy to laser weld, will be explained in detail below.

[0024] like Figure 1-4As shown, when preparing to laser weld the battery, firstly, four battery bodies 4 are placed inside the positioning and shrinking mechanism 6. The elastic shrinking ring 14 is used to initially position the four battery bodies 4. Then, the limiting soft band 15 is used for further shrinking. The central positioning mounting post 16 is placed into the gap between the battery bodies 4. The top metal cooling plate 13 is pressed on the top of each battery body 4, which plays a multiple supporting and positioning role. After the outer perimeter is installed, the battery device 2 is placed on the workbench 1, and the central positioning plate 12 is installed for final fixation. The welding plate body 17 is installed and positioned by fitting the mounting extension plate through the mounting port 8 and the welding plate positioning hole 10 is engaged with the positioning post 19. Welding is performed using a laser welding device. During welding, the laser vision positioning block 11 is scanned. The laser vision positioning block 11 is of uniform size. After visual inspection by the laser welding device, precise positioning welding can be performed. Heat is generated during welding, which can be dissipated through the set annular heat dissipation fins 5 and the top metal cooling plate 13.

[0025] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A battery bottom structure that facilitates laser welding, comprising a worktable (1), characterized in that: The top surface of the workbench (1) is provided with a battery device (2), and the top surface of the battery device (2) is provided with a welding plate mechanism (3). The battery device (2) includes a battery body (4), which is movably connected to the top surface of the workbench (1).

2. The battery bottom structure facilitating laser welding according to claim 1, characterized in that: The surface of the battery body (4) is provided with a positioning and retraction mechanism (6), and the surface of the battery body (4) is provided with annular heat dissipation fins (5).

3. The battery bottom structure facilitating laser welding according to claim 1, characterized in that: The top surface of the battery body (4) is fixedly connected to a battery welding point (9). A welding plate positioning hole (10) is opened on the top surface of the battery body (4) and on one side of the battery welding point (9). A laser vision positioning block (11) is fixedly connected on the other side of the top surface of the battery body (4) and on the other side of the battery welding point (9).

4. The battery bottom structure facilitating laser welding according to claim 2, characterized in that: The positioning and shrinking mechanism (6) includes an elastic shrinking ring (14), which is movably connected to one side of the battery body (4), and a limiting soft band (15) is fixedly connected to the bottom surface of the elastic shrinking ring (14).

5. The battery bottom structure facilitating laser welding according to claim 4, characterized in that: The surface of the limiting soft band (15) is fixedly connected to a central positioning mounting post (16), and the top surface of the central positioning mounting post (16) is snapped with a central positioning plate (12), which abuts against the top surface of the battery body (4).

6. The battery bottom structure facilitating laser welding according to claim 4, characterized in that: The top surface of the elastic shrink ring (14) is fixedly connected to a side positioning plate (7), which abuts against one side of the battery body (4).

7. A battery bottom structure that is easy to laser weld according to claim 6, characterized in that: A top-pressure metal cooling plate (13) is fixedly connected to the surface of the side positioning plate (7). The top-pressure metal cooling plate (13) abuts against the top surface of the battery body (4). An installation port (8) is provided on one side of the side positioning plate (7).

8. The battery bottom structure facilitating laser welding according to claim 1, characterized in that: The welding plate mechanism (3) includes a positioning post (19), which is snapped onto the surface of the welding plate positioning hole (10). The top surface of the positioning post (19) is fixedly connected to the welding plate body (17), and the surface of the welding plate body (17) is provided with an installation extension plate (18).

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