Automatic laser seal welding device for battery case

Abstract

The utility model relates to the technical field of battery production, in particular to an automatic laser seal welding device for a battery case, which comprises a closed working chamber, a forming mechanism, a rotary positioning mechanism and a push rod mechanism, and the closed working chamber is provided with a laser welding mechanism and a welding detection mechanism on the upper side of the forming mechanism; the forming mechanism is provided with a forming jig, the forming jig is provided with an extrusion forming cavity, and the two ends of the extrusion forming cavity communicate with and correspond to the rotary positioning mechanism and the push rod mechanism correspondingly. A battery is placed at the end, facing the push rod mechanism, of the extrusion forming cavity, the push rod mechanism is used for pushing and extruding the battery from one end of the extrusion forming cavity to the rotary positioning mechanism, the rotary positioning mechanism is used for positioning the end of the pushed battery, and the laser welding mechanism is used for conducting sealing welding on the battery. The miniature battery sealing welding device achieves efficient and high-quality sealing welding, has the advantages of being concentrated in energy and high in welding speed, and is suitable for welding tasks such as miniature batteries with extremely high requirements for precision and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to an automatic laser sealing welding device for battery casings. Background Technology

[0002] In the production of micro-batteries, welding the two casings is a crucial step. Currently, this welding operation faces numerous significant challenges. First, the tiny size of micro-batteries demands extremely high precision in the welding process. Conventional welding techniques struggle to achieve accurate positioning and high-quality welding within such a small space, significantly increasing the difficulty of the welding process.

[0003] Current processes cannot achieve the goal of completing casing forming and welding in one step. Traditional methods typically involve forming the casing first, followed by a separate welding process. This not only prolongs the production cycle and increases production costs, but also makes the casing prone to deformation during the transition between the two steps, affecting the overall quality and performance of the micro-batteries. Therefore, new improvements are needed to existing battery production methods. Utility Model Content

[0004] To address the aforementioned issues, this invention achieves efficient and high-quality sealing welding. Its concentrated energy and fast welding speed make it suitable for automatic laser sealing welding of battery casings, a task requiring extremely high precision and efficiency, such as micro batteries.

[0005] The technical solution adopted by this utility model is: an automatic laser sealing welding device for battery casings, including a sealed chamber, a forming mechanism disposed in the sealed chamber, a rotary positioning mechanism and a push rod mechanism respectively located on both sides of the forming mechanism, the sealed chamber being provided with a laser welding mechanism and a welding inspection mechanism on the upper side of the forming mechanism; the forming mechanism is provided with a forming fixture, the forming fixture being provided with an extrusion forming cavity, the two ends of the extrusion forming cavity being respectively connected to and corresponding to the rotary positioning mechanism and the push rod mechanism; during welding, the battery is placed at the end of the extrusion forming cavity facing the push rod mechanism, the push rod mechanism is used to push and squeeze the battery from one end of the extrusion forming cavity toward the rotary positioning mechanism, so that the battery and the extrusion forming cavity remain concentric, the rotary positioning mechanism is used to position the end of the pushed battery, and the laser welding mechanism is used to perform sealing welding on the battery.

[0006] A further improvement to the above solution is that the molding mechanism is provided with a molding support, the molding support is provided with a molding connecting plate, the molding connecting plate is provided with a fixture groove, and the molding fixture is disposed in the fixture groove; the molding fixture is an alloy fixture.

[0007] A further improvement to the above scheme is that the extrusion molding cavity includes a placement section, an extrusion section, and a delivery section arranged sequentially, the placement section facing the push rod mechanism, and the delivery section facing the rotary positioning mechanism; the placement section is used for battery placement and positioning, and the push rod mechanism is used for pushing the battery toward the extrusion section and the delivery end.

[0008] A further improvement to the above solution is that the rotary positioning mechanism includes a rotary positioning bracket, a rotary positioning drive module, and a rotary positioning bushing. The rotary positioning bracket is disposed on one side of the enclosed chamber, the rotary positioning drive module is disposed on the rotary positioning bracket, and the rotary positioning bushing is disposed on the rotary positioning drive module. The rotary positioning drive module is used to drive the rotary positioning bushing to move relative to the extrusion molding cavity.

[0009] A further improvement to the above solution is that the rotary positioning bushing is provided with a positioning groove for positioning one end of the battery, the rotary positioning drive module is provided with a drive connecting rod and a drive sliding seat, the rotary positioning bushing is connected to the drive sliding seat and can rotate; a limit block is provided on one side of the drive sliding seat for limiting the movement of the rotary positioning bushing.

[0010] A further improvement to the above solution is that the push rod mechanism includes a push rod drive module, a push rod moving module, a push rod rotating module, and a movable push rod. The push rod drive module is located on one side of the enclosed working chamber, the push rod moving module is located on the push rod drive module, the push rod rotating module is located on one side of the push rod drive module and is used to drive the movable push rod to rotate, and the movable push rod is located on the push rod moving module and connected to the push rod rotating module.

[0011] A further improvement to the above solution is that the movable push rod pushes the battery through the extrusion molding cavity under the action of the push rod drive module, and fixes both ends of the battery with the cooperation of the rotation positioning mechanism. The push rod rotation module is used to drive the movable push rod to rotate, so as to drive the battery to rotate. During rotation, the outer periphery of the battery is sealed and welded by the laser welding mechanism.

[0012] A further improvement to the above scheme is that the laser head of the laser welding mechanism faces the side of the forming fixture closer to the rotary positioning mechanism.

[0013] A further improvement to the above solution is that the welding inspection mechanism includes an inspection camera, a supplementary lighting module, and a display module. The inspection camera faces the welding point of the battery by the laser welding mechanism, and the supplementary lighting module faces the welding point of the battery. The display module is used to display the image detected by the inspection camera.

[0014] The beneficial effects of this utility model are:

[0015] Compared to existing battery casing welding methods, this invention effectively isolates the welding process from external environmental factors through a sealed chamber design. In micro-battery welding, external dust and impurities may adhere to the battery surface, affecting welding quality and even causing welding defects. The sealed chamber maintains a clean internal environment, ensuring the welding process is carried out under stable and pure conditions, greatly improving welding reliability and stability and reducing scrap rates. The forming mechanism provides precise positioning and forming conditions for micro-battery welding. The extrusion forming cavity on the forming fixture ensures the battery is in the correct position and orientation during welding, and through the synergy of the rotary positioning mechanism and the pusher mechanism, keeps the battery concentric with the extrusion forming cavity. Precise control of concentricity is crucial for the sealed welding of micro-batteries, ensuring uniformity and consistency in laser welding, resulting in higher weld quality, better sealing, effectively preventing electrolyte leakage, and extending battery life. The cooperation of the rotary positioning mechanism and the pusher mechanism further improves the precision and efficiency of battery welding. The pusher mechanism smoothly pushes the battery to the designated position, while the rotary positioning mechanism precisely positions the battery end, providing a stable welding foundation for laser welding. The laser welding mechanism, based on precise positioning, achieves efficient and high-quality sealing welding. Its concentrated energy and high welding speed make it suitable for welding tasks like micro-batteries, which require extremely high precision and efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the automatic laser sealing and welding device for battery casing of this utility model;

[0017] Figure 2 for Figure 1 A three-dimensional schematic diagram of the automatic laser sealing and welding device for the battery casing from another perspective;

[0018] Figure 3 for Figure 1 Side view schematic diagram of the automatic laser sealing and welding device for the battery casing;

[0019] Figure 4 for Figure 1 A schematic diagram of the forming fixture for the automatic laser sealing welding device for battery casings;

[0020] Figure 5 for Figure 1 A schematic diagram of the working status of the automatic laser sealing and welding device for the battery casing.

[0021] Figure 6 for Figure 1 A schematic diagram of the battery structure of the automatic laser sealing welding device for the battery casing.

[0022] Explanation of reference numerals in the attached drawings: 1. Sealed chamber; 2. Molding mechanism; 21. Molding support; 22. Molding connecting plate; 23. Fixture groove; 3. Molding fixture; 31. Extrusion molding cavity; 311. Placement section; 312. Extrusion section; 313. Outlet section; 4. Rotary positioning mechanism; 41. Rotary positioning support; 42. Rotary positioning drive module; 42. Drive connecting rod; 421. Drive sliding seat; 422. Limiting block; 423. Rotary positioning bushing; 43. Positioning groove; 431. Push rod mechanism; 5. Push rod drive module; 51. Push rod moving module; 52. Push rod rotating module; 53. Moving push rod; 54. Laser welding mechanism; 6. Welding inspection mechanism; 7. Inspection camera; 71. Fill light module; 72. Display module; 73. Battery; 8. Housing; 81. First housing; 811. Second housing; 812. Battery cell; 82. End cap; 83. Insulating gasket; 84. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0024] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Figures 1-5As shown, in one embodiment of this utility model, an automatic laser sealing welding device for battery casings is disclosed. The device includes a sealed chamber 1, a forming mechanism 2 disposed within the sealed chamber 1, a rotary positioning mechanism 4 located on both sides of the forming mechanism 2, and a pusher mechanism 5. The sealed chamber 1 is positioned above the forming mechanism 2 and houses a laser welding mechanism 6 and a welding inspection mechanism 7. The forming mechanism 2 is equipped with a forming fixture 3, which has an extrusion forming cavity 31. The two ends of the extrusion forming cavity 31 are connected to and correspond to the rotary positioning mechanism 4 and the pusher mechanism 5, respectively. During welding, the battery is placed at the end of the extrusion forming cavity 31 facing the pusher mechanism 5. The pusher mechanism 5 pushes and compresses the battery from one end of the extrusion forming cavity 31 towards the rotary positioning mechanism 4, ensuring concentricity between the battery and the extrusion forming cavity 31. The rotary positioning mechanism 4 positions the pushed-in battery end. The laser welding mechanism 6 performs sealing welding on the battery. This embodiment effectively isolates the welding process from external environmental factors through the design of the sealed chamber 1. In micro-battery welding, external dust and impurities may adhere to the battery surface, affecting welding quality and even causing welding defects. The sealed working chamber 1 maintains a clean internal environment, ensuring the welding process takes place under stable and pure conditions, greatly improving welding reliability and stability and reducing scrap rates. The forming mechanism 2 provides precise positioning and forming conditions for micro-battery welding. The extrusion forming cavity 31 on the forming fixture 3 ensures the battery is in the correct position and orientation during welding, and through the synergy with the rotary positioning mechanism 4 and the push rod mechanism 5, keeps the battery concentric with the extrusion forming cavity 31. Precise control of concentricity is crucial for the sealed welding of micro-batteries, ensuring uniformity and consistency in laser welding, resulting in higher weld quality, better sealing, effectively preventing electrolyte leakage, and extending battery life. The cooperation of the rotary positioning mechanism 4 and the push rod mechanism 5 further improves the accuracy and efficiency of battery welding. The push rod mechanism 5 smoothly pushes the battery to the designated position, while the rotary positioning mechanism 4 precisely positions the battery end, providing a stable welding foundation for laser welding. The laser welding mechanism 6 can achieve efficient and high-quality sealing welding based on this precise positioning. Its concentrated energy and fast welding speed make it very suitable for welding tasks such as micro batteries, which have extremely high requirements for precision and efficiency.

[0026] The forming mechanism 2 is equipped with a forming support 21, which in turn is equipped with a forming connecting plate 22. The forming connecting plate 22 has a fixture groove 23, and the forming fixture 3 is disposed within the fixture groove 23. The forming fixture 3 is an alloy fixture. In this embodiment, the forming support 21 serves as a basic support structure, stably supporting the forming connecting plate 22 and ensuring the stability of the entire formed component, providing a reliable foundation for subsequent welding work. The fixture groove 23 on the forming connecting plate 22 provides precise installation and positioning for the forming fixture 3, and ensures that the forming fixture 3 will not shift during welding, greatly improving welding accuracy. The use of alloy fixtures for micro-battery welding demonstrates excellent high-temperature resistance and wear resistance in a closed environment. It maintains shape stability under the high-temperature environment of laser welding, preventing heat deformation from affecting welding quality. This ensures that precise dimensional accuracy is maintained even after multiple uses, guaranteeing the consistency and reliability of welding each micro-battery casing, effectively improving product yield.

[0027] The extrusion molding cavity 31 includes a placement section 311, an extrusion section 312, and an output section 313 arranged sequentially. The placement section 311 faces the pusher mechanism 5, and the output section 313 faces the rotary positioning mechanism 4. The placement section 311 is used for battery placement and positioning, and the pusher mechanism 5 is used to push the battery toward the extrusion section 312 and the output end. In this embodiment, the placement section 311 can accurately position the battery, providing a stable starting foundation for subsequent welding processes, reducing inaccurate welding positions caused by battery placement deviations, and ensuring welding accuracy. The pusher mechanism 5 accurately pushes the battery to the extrusion section 312 and the output end. This process effectively ensures the smoothness and controllability of battery movement, facilitating transmission along a predetermined trajectory in a closed environment, and preventing the battery from shaking or shifting during transmission, which would affect welding quality. The synergistic effect of the extrusion section 312 and the output section 313 can further moderately extrude and output the battery, ensuring that the battery casing reaches a suitable shape and position before entering the welding area, optimizing the contact condition during welding, and improving the stability and reliability of laser sealing welding. A micro-arc surface is provided between the placement section 311 and the extrusion section 312 for over-extrusion.

[0028] The rotary positioning mechanism 4 includes a rotary positioning bracket 41, a rotary positioning drive module 42, and a rotary positioning bushing 43. The rotary positioning bracket 41 is disposed on one side of the enclosed chamber 1, the rotary positioning drive module 42 is disposed on the rotary positioning bracket 41, and the rotary positioning bushing 43 is disposed on the rotary positioning drive module 42. The rotary positioning drive module 42 is used to drive the rotary positioning bushing 43 to move relative to the extrusion molding cavity 31. Specifically, the rotary positioning bushing 43 is provided with a positioning groove 431 for positioning one end of the battery. The rotary positioning drive module 42 is provided with a drive connecting rod 421 and a drive sliding seat 422. The rotary positioning bushing 43 is connected to the drive sliding seat 422 and is rotatable. A limit block 423 is provided on one side of the drive sliding seat 422 for limiting the movement of the rotary positioning bushing 43. In this embodiment, the rotary positioning drive module 42 precisely drives the rotary positioning bushing 43 to move relative to the extrusion molding cavity 31, enabling the battery to be accurately delivered to the welding position. This greatly improves the welding position accuracy, effectively reduces welding defects caused by positioning deviations, and ensures the consistency and stability of the micro battery casing welding. The positioning groove 431 on the rotary positioning bushing 43 can accurately position one end of the battery, ensuring that the battery is in a stable posture during the welding process, avoiding shaking or displacement, thereby improving the welding quality. The drive sliding seat 422 is connected to and can rotate with the rotary positioning bushing 43. In conjunction with the limiting block 423, the movement of the rotary positioning bushing 43 is limited, allowing for flexible adjustment of the battery position and angle to meet the welding requirements of micro batteries of different specifications, enhancing the versatility and adaptability of the device.

[0029] The push rod mechanism 5 includes a push rod drive module 51, a push rod moving module 52, a push rod rotating module 53, and a movable push rod 54. The push rod drive module 51 is located on one side of the enclosed chamber 1. The push rod moving module 52 is mounted on the push rod drive module 51. The push rod rotating module 53 is located on one side of the push rod drive module 51 and is used to drive the movable push rod 54 to rotate. The movable push rod 54 is mounted on the push rod moving module 52 and connected to the push rod rotating module 53. Specifically, the movable push rod 54 pushes the battery through the extrusion molding cavity 31 under the action of the push rod drive module 51, and fixes both ends of the battery with the cooperation of the rotation positioning mechanism 4. The push rod rotating module 53 drives the movable push rod 54 to rotate, thereby causing the battery to rotate. During rotation, the outer periphery of the battery is sealed and welded by the laser welding mechanism 6. In this embodiment, the coordinated arrangement of the push rod drive module 51, push rod moving module 52, push rod rotating module 53, and moving push rod 54 enables precise movement and positioning of the battery within a closed environment. In the specific layout of the sealed chamber 1, the push rod drive module 51 provides stable power, allowing the moving push rod 54 to precisely push the micro-battery through the extrusion molding cavity 31, ensuring the precision and stability of the battery casing molding. The push rod moving module 52 flexibly adjusts the position of the moving push rod 54 to meet the welding requirements of micro-batteries of different specifications, improving the versatility of the device. The push rod rotating module 53 drives the moving push rod 54 to rotate the battery, which, in conjunction with the laser welding mechanism 6, enables uniform and continuous sealing welding of the battery's outer periphery, effectively improving welding quality, reducing welding defects, and ensuring the sealing and stability of the micro-battery. The rotating positioning mechanism 4 reliably fixes both ends of the battery within the closed environment, preventing displacement of the battery during welding and ensuring the accuracy of the welding position.

[0030] The laser head of the laser welding mechanism 6 faces the side of the forming fixture 3 closest to the rotary positioning mechanism 4. Specifically, the welding inspection mechanism 7 includes an inspection camera 71, a supplementary lighting module 72, and a display module 73. The inspection camera 71 faces the welding point of the battery by the laser welding mechanism 6, and the supplementary lighting module 72 faces the welding point of the battery. The display module 73 is used to display the image detected by the inspection camera 71. In this embodiment, the precise orientation of the laser head ensures that the laser energy can act efficiently and accurately on the welding part of the micro battery shell, greatly improving the welding accuracy and quality, effectively reducing welding defects such as incomplete welding and missing welding, and providing strong protection for the sealing performance of the micro battery. The inspection camera 71, facing the welding point of the battery by the laser welding mechanism 6, can capture image information of the welding area in real time, promptly detect abnormalities in the welding process, such as changes in the shape and width of the weld, so as to adjust the welding parameters in time and ensure the stability of the welding quality. The supplementary lighting module 72 faces the welded area of ​​the battery, providing ample and uniform light to the inspection camera 71, improving image clarity and contrast, and enabling the inspection camera 71 to more accurately acquire detailed information about the welded area. The display module 73 is used to display the image detected by the inspection camera 71, allowing operators to intuitively observe the welding situation, monitor and adjust the welding process in real time, and further improve the reliability and controllability of the entire welding process.

[0031] See Figures 1-6 As shown, an automatic laser sealing welding method for battery casing is implemented based on the aforementioned automatic laser sealing welding device for battery casing;

[0032] The battery 8 includes a casing 81, a cell 82, an end cap 83, and an insulating gasket 84. The casing 81 includes a first housing 811 and a second housing 812, which are fitted together to form a cavity. The cell 82 is disposed in the cavity. One end of the first housing 811 is provided with a through groove. The insulating gasket 84 is used to insulate and separate the end cap 83 from the casing 81. The first housing 811 and the second housing 812 are fitted together to form a weld groove.

[0033] The laser sealing welding method includes the following steps:

[0034] Step S1: Place the assembled battery 8 in the sealed chamber 1 and perform laser sealing welding in the sealed environment; Step S2: Place one end of the battery 8 into one end of the extrusion molding cavity 31, and then the pusher mechanism 5 pushes the battery 8 toward the center of the extrusion molding cavity 31. During the pushing process, the first housing 811 and the second housing 812 are coaxially aligned and connected during the extrusion process; Step S3: The pusher mechanism 5 pushes the battery 8, which has passed through the extrusion molding cavity 31, toward the rotary positioning mechanism 4. At this time, the rotary positioning mechanism 4 and the pusher mechanism 5 respectively abut against the two ends of the battery 8, and One end of the battery 8 is located in the extrusion molding cavity 31. At this time, the weld groove is exposed below the laser welding mechanism 6. In step S4, the weld groove is welded by the laser welding mechanism 6 to seal the outer shell 81. During the welding process, the push rod mechanism 5 drives the battery 8 to rotate to perform 360° welding on the outer shell 81 of the battery 8. During the welding process, the welding detection mechanism 7 detects the welding process. In step S5, after the welding is completed, the push rod mechanism 5 pushes the battery 8 out of the extrusion molding cavity 31. At this time, the rotation positioning mechanism 4 follows and moves backward to unload the battery 8 after welding.

[0035] The above embodiments were carried out under the following conditions: environmental control parameters, oxygen content control in the sealed chamber: oxygen concentration ≤50ppm, preferably ≤10ppm, to prevent metal oxidation; temperature and humidity control: temperature 20-25℃, relative humidity ≤15%; inert gas type: argon, nitrogen or helium, gas flow rate 5-20 L / min; chamber pressure: slightly positive pressure (+0.1-0.5 kPa) to prevent external air from seeping in.

[0036] During the extrusion molding process, the coaxial alignment accuracy is as follows: the coaxiality tolerance between the first shell 811 and the second shell 812 is ≤0.02mm; the extrusion pressure range is 0.5-3MPa, with segmented pressure control: 0.5MPa for the initial segment and 2MPa for the alignment segment; the extrusion speed is 5-20mm / s, with speed gradient control; low-speed start-up and high-speed advancement; and positioning feedback is achieved by using a laser displacement sensor to monitor the alignment gap in real time.

[0037] In this embodiment, the welding of the micro battery 8 is subject to stringent environmental requirements. Dust and impurities in the air may adhere to the welding area, affecting the welding quality and leading to problems such as weak welds and porosity. The sealed working chamber 1 effectively isolates external impurities, ensuring the purity of the welding environment, improving the stability and reliability of the welding, and reducing the scrap rate. Through the synergistic action of the extrusion molding cavity 31 and the push rod mechanism 5, the first shell 811 and the second shell 812 are coaxially and aligned during the extrusion process. This ensures the uniformity and regularity of the weld groove, providing a good foundation for subsequent laser welding. Precise alignment reduces deviations during welding, making the weld more uniform and aesthetically pleasing, and improving the overall sealing of the shell 81. The rotation positioning mechanism 4 works in conjunction with the push rod mechanism 5 to accurately expose the weld groove below the laser welding mechanism 6, and drives the battery 8 to rotate during the welding process to achieve 360° welding. The comprehensive welding method ensures that all parts of the micro battery 8 casing 81 are fully and uniformly welded, effectively improving the sealing performance of the casing 81, preventing electrolyte leakage and other problems, and extending the service life of the micro battery 8. The welding inspection mechanism 7 monitors the welding process in real time, enabling timely detection of abnormalities such as insufficient welding strength or welding path deviation, and making timely adjustments.

[0038] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An automatic laser sealing welding device for battery casings, characterized in that: The device includes a sealed chamber, a molding mechanism disposed within the sealed chamber, a rotary positioning mechanism located on both sides of the molding mechanism, and a push rod mechanism. A laser welding mechanism and a welding inspection mechanism are disposed on the upper side of the sealed chamber. The molding mechanism is equipped with a molding fixture, which has an extrusion molding cavity. The two ends of the extrusion molding cavity are connected to and correspond to the rotary positioning mechanism and the push rod mechanism, respectively. During welding, the battery is placed at the end of the extrusion molding cavity facing the push rod mechanism. The push rod mechanism pushes and extrudes the battery from one end of the extrusion molding cavity toward the rotary positioning mechanism to keep the battery concentric with the extrusion molding cavity. The rotary positioning mechanism positions the end of the pushed battery. The laser welding mechanism performs sealing welding on the battery.

2. The automatic laser sealing welding device for battery casing according to claim 1, characterized in that: The forming mechanism is provided with a forming support, the forming support is provided with a forming connecting plate, the forming connecting plate is provided with a fixture groove, and the forming fixture is disposed in the fixture groove; the forming fixture is an alloy fixture.

3. The automatic laser sealing welding device for battery casing according to claim 1, characterized in that: The extrusion molding cavity includes a placement section, an extrusion section, and a delivery section arranged sequentially. The placement section faces the push rod mechanism, and the delivery section faces the rotary positioning mechanism. The placement section is used for battery placement and positioning, and the push rod mechanism is used to push the battery toward the extrusion section and the delivery end.

4. The automatic laser sealing welding device for battery casing according to claim 1, characterized in that: The rotary positioning mechanism includes a rotary positioning bracket, a rotary positioning drive module, and a rotary positioning bushing. The rotary positioning bracket is disposed on one side of the enclosed chamber, the rotary positioning drive module is disposed on the rotary positioning bracket, and the rotary positioning bushing is disposed on the rotary positioning drive module. The rotary positioning drive module is used to drive the rotary positioning bushing to move relative to the extrusion molding cavity.

5. The automatic laser sealing welding device for battery casing according to claim 4, characterized in that: The rotary positioning bushing is provided with a positioning groove for positioning one end of the battery. The rotary positioning drive module is provided with a drive connecting rod and a drive sliding seat. The rotary positioning bushing is connected to the drive sliding seat and can rotate. A limit block is provided on one side of the drive sliding seat for limiting the movement of the rotary positioning bushing.

6. The automatic laser sealing welding device for battery casing according to claim 1, characterized in that: The push rod mechanism includes a push rod drive module, a push rod moving module, a push rod rotating module, and a movable push rod. The push rod drive module is located on one side of the enclosed chamber. The push rod moving module is located on the push rod drive module. The push rod rotating module is located on one side of the push rod drive module and is used to drive the movable push rod to rotate. The movable push rod is located on the push rod moving module and is connected to the push rod rotating module.

7. The automatic laser sealing welding device for battery casing according to claim 6, characterized in that: The movable push rod, under the action of the push rod drive module, pushes the battery through the extrusion molding cavity and fixes both ends of the battery with the cooperation of the rotation positioning mechanism. The push rod rotation module is used to drive the movable push rod to rotate, so as to drive the battery to rotate. During rotation, the outer periphery of the battery is sealed and welded by the laser welding mechanism.

8. The automatic laser sealing welding device for battery casing according to claim 1, characterized in that: The laser head of the laser welding mechanism faces the side of the forming fixture closest to the rotary positioning mechanism.

9. The automatic laser sealing welding device for battery casing according to claim 1, characterized in that: The welding inspection mechanism includes an inspection camera, a supplementary lighting module, and a display module. The inspection camera faces the welding point of the battery by the laser welding mechanism, and the supplementary lighting module faces the welding point of the battery. The display module is used to display the image detected by the inspection camera.

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