Lithium battery module welding equipment and welding method thereof

Abstract

The lithium battery module welding equipment comprises a rack and further comprises an operation table, the operation table is connected to the lower portion of the rack, and a first feeding mechanical arm, a second feeding mechanical arm and a discharging mechanical arm are arranged on the side face of the operation table; and the welding machine is connected to the operation table. A battery is obtained from a first feeding table through a first feeding mechanical arm, the battery is placed in a discharging base below the battery, a pole piece is obtained from a second feeding table through a second feeding mechanical arm, the pole piece is placed on the battery, a welding machine welds the pole piece and the battery, and after welding is completed, a monitoring mechanism observes whether welding is qualified or not. The discharging mechanical arm places the qualified batteries on the first discharging table, and places the unqualified batteries on the second discharging table, by integrating a plurality of automatic assemblies, the efficient welding process and real-time quality monitoring are achieved, the production efficiency and the product quality are improved, the important application value is achieved, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery welding, and in particular to a lithium battery module welding device and a welding method thereof. Background Art

[0002] A lithium battery welding device is a device used to weld and connect the electrode sheets in a lithium battery cell or battery pack to the battery leads. A lithium battery is composed of a positive electrode, a negative electrode, a separator and an electrolyte. The positive electrode and the negative electrode are both composed of multiple layers of electrode sheets stacked together, and each electrode sheet contains components such as electrode active materials, conductive agents and adhesives. The battery leads are used to connect the electrode sheets and electronic devices.

[0003] At present, in the production welding process of cylindrical batteries, the existing lithium battery laser welding devices are roughly divided into two categories. One is a fixed laser welding head. When using this type of device for battery cell welding, workers are required to repeatedly move the lithium battery to align the electrode position with the laser welding head, which is cumbersome to operate; the other is a welding device with a movable laser welding head. This type of device can move the laser welding head according to a preset trajectory. Workers can place the lithium battery pack at the designated position for welding. However, these welding devices often require at least two workers to cooperate in loading and unloading during welding, which affects work efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art, and a lithium battery module welding device is proposed, which includes a frame and also includes: an operating table, the operating table is connected to the bottom of the frame, and a first loading robot, a second loading robot and a unloading robot are arranged on the side of the operating table; a welding machine, the welding machine is connected to the operating table and is located between the second loading robot and the unloading robot; a monitoring mechanism, the monitoring mechanism is arranged on one side of the unloading robot; a loading mechanism, the loading mechanism is connected to the operating table; wherein the loading mechanism drives the lithium battery to pass through the first loading robot, the second loading robot and the unloading robot in sequence.

[0005] As a further description of the above technical solution: a control box and a control panel are arranged on the frame, a first loading platform is arranged on one side of the first loading robot, a second loading platform is arranged on one side of the second loading robot, a first unloading platform is arranged on one side of the unloading robot, a second unloading platform is arranged on the other side of the unloading robot, and one side of the welding machine is detachably connected to the electric lifting rod.

[0006] As a further description of the above technical solution: the monitoring mechanism includes a camera, the bottom of the camera is connected to an electric telescopic rod, the camera is connected to a data box through a wire, and the electric telescopic rod is arranged on one side of the unloading robot.

[0007] As a further description of the above technical solution: the loading mechanism includes a driving disk, the lower part of the driving disk is connected to the driving assembly, and the first discharge seat, the second discharge seat, the third discharge seat and the fourth discharge seat are arranged at equal intervals above the driving disk.

[0008] As a further description of the above technical solution: an air pump is arranged inside the operating table, an air pump is connected to the top of the air pump, the top of the air pump is rotatably connected to the regulating pipe, the regulating pipe is connected to the first connecting pipe on all sides, and the first connecting pipe is connected to the first control valve.

[0009] As a further description of the above technical solution: the first discharge seat, the second discharge seat, the third discharge seat and the fourth discharge seat are all provided with adsorption holes, and the lower part of the adsorption holes is connected to the suction end of the first connecting pipe.

[0010] As a further description of the above technical solution: a detachable suction pipe is above the driving disk, a plurality of suction heads are arranged on the suction pipe, the suction pipe is connected to the regulating pipe through a second connecting pipe, a second control valve is arranged on the second connecting pipe, one side of the vacuum pump is connected to the exhaust pipe, and one end of the exhaust pipe is connected to other purification boxes.

[0011] As a further description of the above technical solution: a limiting slide is provided at one end of the exhaust pipe, and a limiting slide groove adapted to the limiting slide is provided on the regulating pipe.

[0012] A lithium battery module welding method: the method steps specifically include: S1, a first loading robot places the battery on the first loading table in a discharge seat of the first station below it, and then the loading mechanism rotates 90° counterclockwise to enter the second station. At this time, the first loading robot continues to place the battery to be welded in another discharge seat that enters the first station; S2: the second loading robot places the electrode piece on the second loading table on the battery in the second station below it, and at the same time, the welding machine welds the electrode piece on the battery in the second station, and then the loading mechanism rotates 90° counterclockwise to enter the third station, and continues to place the battery to be welded in another discharge seat that enters the first station; S3: the monitoring mechanism observes whether the welding is qualified, and then the unloading robot places the welded battery in the third station below it on the first unloading table or the second unloading table. After unloading, the loading mechanism rotates 90° counterclockwise again, and continues to place the battery to be welded in another discharge seat that enters the first station.

[0013] As a further description of the above technical solution: in step S3, if the monitoring mechanism observes that the welding is qualified, the unloading robot places the welded battery at the third station below it on the first unloading table; if the monitoring mechanism observes that the welding is unqualified, the unloading robot places the welded battery at the third station below it on the second unloading table.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] 1. The present invention obtains batteries from the first loading platform by a first loading robot, and places the batteries in a discharge seat thereunder; the second loading robot obtains pole pieces from the second loading platform, and places the pole pieces on the batteries; the welding machine welds the pole pieces and the batteries; after the welding is completed, the monitoring mechanism observes whether the welding is qualified; the unloading robot places the batteries with qualified welding on the first unloading platform, and places the batteries with unqualified welding on the second unloading platform; by integrating multiple automated components, an efficient welding process and real-time quality monitoring are realized, which is suitable for the automated upgrade of lithium battery production lines; the design of the equipment makes the entire welding and testing process smoother, improves production efficiency and product quality, has important application value, and accelerates work efficiency.

[0016] 2. The present invention can drive the driving disk to rotate by controlling the driving assembly, so that the first discharge seat, the second discharge seat, the third discharge seat and the fourth discharge seat can pass under the welding machine in sequence to weld the electrode pieces to be welded on the battery. When the welding head welds the electrode pieces, the first loading manipulator and the unloading manipulator can load and unload at the same time, so that loading, welding and unloading can be carried out simultaneously, which saves a lot of time and improves work efficiency.

[0017] 3. The present invention controls the operation of the vacuum pump, and can evacuate the adsorption holes on the first discharge seat, the second discharge seat, the third discharge seat and the fourth discharge seat through the first connecting pipe, so that negative pressure is formed inside the adsorption holes, and the batteries placed above the adsorption holes can be adsorbed and fixed, thereby enhancing the stability of the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a lithium battery module welding device according to an embodiment of the present invention;

[0019] Figure 2 A top view of a lithium battery module welding device according to an embodiment of the present invention;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the operating table in the lithium battery module welding equipment;

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the loading mechanism in the lithium battery module welding equipment;

[0022] Figure 5 for Figure 1 Schematic diagram of the structure of the drive disk in the lithium battery module welding equipment;

[0023] Figure 6 for Figure 1 Schematic diagram of the structure of the regulating tube in the lithium battery module welding equipment.

[0024] Legend:

[0025] 1. Frame; 2. Operation table; 3. First loading manipulator; 4. Second loading manipulator; 5. Unloading manipulator; 6. Welding machine; 7. Monitoring mechanism; 8. Loading mechanism; 9. Control box; 10. Control panel; 11. First loading platform; 12. Second loading platform; 13. First unloading platform; 14. Second unloading platform; 15. Electric lifting rod; 16. Vacuum pump; 17. Vacuum pipe; 18. Adjusting pipe; 19. First connecting pipe; 20. First control valve; 21. Suction pipe; 22. Suction Air head; 23, second connecting pipe; 24, second control valve; 25, exhaust pipe; 26, purification box; 71, camera; 72, electric telescopic rod; 73, data box; 81, drive disk; 82, drive assembly; 83, first discharge seat; 84, second discharge seat; 85, third discharge seat; 86, fourth discharge seat; 87, adsorption hole; 821, drive motor; 822, gear set; 823, rotating shaft; 824, bearing seat; 1701, limit slide plate; 1801, limit slide groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] See also Figure 1-6 The present invention provides a technical solution: a lithium battery module welding device of the present invention includes a frame 1, and also includes: an operating table 2, the operating table 2 is connected below the frame 1, and a first loading manipulator 3, a second loading manipulator 4 and a unloading manipulator 5 are arranged on the side of the operating table 2; a welding machine 6, the welding machine 6 is connected to the operating table 2 and is located between the second loading manipulator 4 and the unloading manipulator 5; a monitoring mechanism 7, the monitoring mechanism 7 is arranged on one side of the unloading manipulator 5; a loading mechanism 8, the loading mechanism 8 is connected to the operating table 2; wherein the loading mechanism 8 drives the lithium battery to pass through the first loading manipulator 3, the second loading manipulator 4 and the unloading manipulator 5 in sequence.

[0030] In this embodiment, the first loading robot 3 obtains the battery from the first loading table 11 and places the battery in the discharge seat below it. The second loading robot 4 obtains the electrode from the second loading table 12 and places the electrode on the battery. The welding machine 6 welds the electrode and the battery. After the welding is completed, the monitoring mechanism 7 observes whether the welding is qualified. The unloading robot 5 places the battery with qualified welding on the first unloading table 13, and places the battery with unqualified welding on the second unloading table 14. By integrating multiple automated components, efficient welding process and real-time quality monitoring are realized, which is suitable for the automation upgrade of lithium battery production lines. The design of the equipment makes the entire welding and testing process smoother, improves production efficiency and product quality, has important application value, and speeds up work efficiency.

[0031] Specifically, by controlling the driving assembly 82, the driving disk 81 can be driven to rotate, so that the first discharge seat 83, the second discharge seat 84, the third discharge seat 85 and the fourth discharge seat 86 can pass under the welding machine 6 in sequence to weld the electrode pieces to be welded on the battery. When the welding head 8 welds the electrode pieces, the first loading robot 3 and the unloading robot 5 can load and unload at the same time, so that loading, welding and unloading can be carried out simultaneously, which saves a lot of time and improves work efficiency.

[0032] like Figure 1 and Figure 2 As shown, a control box 9 and a control panel 10 are provided on the frame 1, a first loading platform 11 is provided on one side of the first loading robot 3, a second loading platform 12 is provided on one side of the second loading robot 4, a first unloading platform 13 is provided on one side of the unloading robot 5, a second unloading platform 14 is provided on the other side of the unloading robot 5, and one side of the welding machine 6 is detachably connected to the electric lifting rod 15; the working state and working parameters of the device can be adjusted by the control panel 10, the batteries to be welded can be stored through the first loading platform 11, the pole pieces to be welded can be stored through the second loading platform 12, the lithium batteries with qualified welding can be received through the first unloading platform 13, and the lithium batteries with unqualified welding can be received through the second unloading platform 14.

[0033] like Figure 1 and Figure 3 As shown, the monitoring mechanism 7 includes a camera 71, which is connected to an electric telescopic rod 72 at the bottom, and the camera 71 is connected to a data box 73 through a wire. The electric telescopic rod 72 is arranged on one side of the unloading robot 5; the camera 71 is arranged on one side of the unloading robot 5 and is responsible for detecting the welding quality. The position of the camera can be adjusted through the electric telescopic rod 72 to better observe the welding effect. The camera 71 is connected to the data box 73 through a wire, and real-time data processing and analysis can be performed.

[0034] like Figure 1 and Figure 3 As shown, the loading mechanism 8 includes a driving disk 81, which is connected to a driving assembly 82 at the bottom, and a first discharge seat 83, a second discharge seat 84, a third discharge seat 85 and a fourth discharge seat 86 are arranged at equal intervals above the driving disk 81; the driving assembly 82 can drive the driving disk 81 to rotate, and the positions of the first discharge seat 83, the second discharge seat 84, the third discharge seat 85 and the fourth discharge seat 86 can be continuously adjusted.

[0035] Among them, the driving component 82 includes a driving motor 821, which is connected to the rotating shaft 823 through a gear set 822. The rotating shaft 823 is rotatably connected to the operating table 2 through a bearing seat 824 below, and the exhaust pipe 17 is located inside the rotating shaft 823; when the driving motor 821 works, the driving wheel in the gear set 822 can drive the driven wheel to rotate, thereby driving the rotating shaft 823 and the driving disk 81 above it to rotate.

[0036] like Figure 3 and Figure 4 As shown, an air pump 16 is arranged inside the operating table 2, and an air suction pipe 17 is connected above the air suction pump 16. The air suction pipe 17 is rotatably connected to the regulating pipe 18 above. The regulating pipe 18 is connected with first connecting pipes 19 on all sides, and the first connecting pipe 19 is connected to the first control valve 20. The first discharge seat 83, the second discharge seat 84, the third discharge seat 85 and the fourth discharge seat 86 are all provided with adsorption holes 87, and the bottom of the adsorption hole 87 is connected to the suction end of the first connecting pipe 19.

[0037] In this embodiment, by controlling the operation of the vacuum pump 16, the adsorption holes 87 provided on the first discharge seat 83, the second discharge seat 84, the third discharge seat 85 and the fourth discharge seat 86 can be evacuated through the first connecting pipe 19, so that a negative pressure is formed inside the adsorption holes 87, and the batteries placed above the adsorption holes 87 can be adsorbed and fixed, thereby enhancing the stability of the welding process, and the suction force can be adjusted by the first control valve 20.

[0038] There are four first connecting pipes 19 and four first control valves 20 , and the four first control valves 20 are independently controlled by the control box 9 .

[0039] like Figure 3 and Figure 4 As shown, a suction pipe 21 is detachably connected above the driving disk 81, and a plurality of suction heads 22 are arranged on the suction pipe 21. The suction pipe 21 is connected to the regulating pipe 18 through a second connecting pipe 23, and a second control valve 24 is arranged on the second connecting pipe 23. One side of the vacuum pump 16 is connected to an exhaust pipe 25, and one end of the exhaust pipe 25 is connected to a purification box 26. The design of the suction pipe 21 and the plurality of suction heads 22 can effectively suck in the smoke and dust generated during welding, keep the welding area clean, and improve the working environment of the workers. By setting the second control valve 24, the suction force of the suction pipe can be flexibly adjusted. This enables the equipment to be adjusted according to different welding conditions, thereby improving the dust collection effect. Timely removal of welding smoke and harmful gases can reduce the risk of workers being exposed to harmful substances and improve operational safety.

[0040] The first connecting pipe 19 and the second connecting pipe 23 are both evacuated by the air pump 16 .

[0041] like Figure 5 and Figure 6 As shown, a limiting slide 1701 is provided at one end of the exhaust pipe 17, and a limiting slide groove 1801 adapted to the limiting slide 1701 is opened on the regulating pipe 18; the limiting slide 1701 can rotate in the limiting slide groove 1801, so that the regulating pipe 18 can rotate on the exhaust pipe 17.

[0042] A lithium battery module welding method, the method steps specifically include: S1, the first loading robot 3 places the battery on the first loading table 11 in the discharge seat of the first station below it, and then the loading mechanism 8 rotates 90° counterclockwise to enter the second station. At this time, the first loading robot 3 continues to place the battery to be welded in another discharge seat entering the first station; S2: the second loading robot 4 places the electrode piece on the second loading table 12 on the battery in the second station below it, and at the same time, the welding machine 6 welds the electrode piece to the battery in the second station, and then the loading mechanism 8 rotates 90° counterclockwise to enter the third station, and continues to place the battery to be welded in another discharge seat entering the first station; S3: the monitoring mechanism 7 observes whether the welding is qualified, and then the unloading robot 5 places the welded battery in the third station below it on the first unloading table 13 or the second unloading table 14. After unloading, the loading mechanism 8 rotates 90° counterclockwise again, and continues to place the battery to be welded in another discharge seat entering the first station. In step S3, if the monitoring mechanism 7 observes that the welding is qualified, the unloading robot 5 places the welded battery at the third station below it on the first unloading table 13; if the monitoring mechanism 7 observes that the welding is unqualified, the unloading robot 5 places the welded battery at the third station below it on the second unloading table 14.

[0043] In this embodiment, each manipulator and loading mechanism has a clear division of labor and can move quickly between multiple workstations, reducing waiting time and improving production efficiency. Through the automatic operation of the manipulator, manual intervention is reduced, labor costs are reduced, and the stability and consistency of the production line are improved. The monitoring mechanism 7 performs quality inspection after welding, and can promptly identify products with unqualified welding, thereby preventing unqualified products from entering the next production link and reducing resource waste. According to the monitoring results, batteries with qualified welding and unqualified batteries are placed on different unloading tables (the first unloading table 13 and the second unloading table 14), respectively, realizing reasonable resource allocation and management and improving the flexibility of the overall operation. The design of the manipulator and the loading mechanism allows multiple processes to be completed efficiently in a limited space, optimizes the production layout, and improves space utilization. The counterclockwise rotation design of the loading mechanism 8 ensures that the system can operate continuously without pausing, ensuring the smooth operation of the production line. The system can be adjusted according to the production requirements of different types of batteries to adapt to different production tasks, and has good scalability and adaptability.

[0044] Among them, the design of the first feeding robot 3 enables it to quickly place the battery in the correct position, laying the foundation for the smooth progress of subsequent processes. The cooperation between the second feeding robot 4 and the welding machine 6 ensures the efficient welding of the electrode and the battery, and improves the welding quality and speed. The quality inspection performed by the monitoring mechanism 7 after the welding is completed ensures the qualified rate of each product. Only qualified products can enter the next step, which greatly reduces the unnecessary expenses of subsequent processing. This multi-robot, multi-station automated production process not only improves production efficiency and product quality, but also helps to reduce costs and improve the safety of the working environment. It is a very effective solution in modern manufacturing.

[0045] Working principle: The first loading robot 3 obtains the battery from the first loading table 11 and places the battery in the discharge seat below it. The second loading robot 4 obtains the electrode from the second loading table 12 and places the electrode on the battery. The welding machine 6 welds the electrode and the battery. After the welding is completed, the monitoring mechanism 7 observes whether the welding is qualified. The unloading robot 5 places the battery with qualified welding on the first unloading table 13, and the battery with unqualified welding on the second unloading table 14. By integrating multiple automated components, efficient welding process and real-time quality monitoring are realized, which is suitable for the automation upgrade of lithium battery production lines. The design of the equipment makes the entire welding and testing process smoother, improves production efficiency and product quality, has important application value, and speeds up work efficiency.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A lithium battery module welding device, comprising a frame (1), characterized in that: Also includes: An operating table (2), the operating table (2) being connected below the frame (1), and a first loading manipulator (3), a second loading manipulator (4) and a unloading manipulator (5) being arranged on the side of the operating table (2); A welding machine (6), the welding machine (6) being connected to the operating table (2) and being located between the second loading manipulator (4) and the unloading manipulator (5); A monitoring mechanism (7), wherein the monitoring mechanism (7) is arranged on one side of the material discharging manipulator (5); A loading mechanism (8), the loading mechanism (8) being connected to the operating table (2); The loading mechanism (8) drives the lithium battery to pass through the first loading robot (3), the second loading robot (4) and the unloading robot (5) in sequence.

2. A lithium battery module welding device according to claim 1, characterized in that: The frame (1) is provided with a control box (9) and a control panel (10); a first loading platform (11) is provided on one side of the first loading robot (3); a second loading platform (12) is provided on one side of the second loading robot (4); a first unloading platform (13) is provided on one side of the unloading robot (5); a second unloading platform (14) is provided on the other side of the unloading robot (5); and one side of the welding machine (6) is detachably connected to an electric lifting rod (15).

3. A lithium battery module welding device according to claim 1, characterized in that: The monitoring mechanism (7) comprises a camera (71), the lower part of the camera (71) is connected to an electric telescopic rod (72), the camera (71) is connected to a data box (73) via a wire, and the electric telescopic rod (72) is arranged on one side of the unloading robot (5).

4. A lithium battery module welding device according to claim 1, characterized in that: The loading mechanism (8) comprises a driving disk (81), the lower part of the driving disk (81) is connected to a driving assembly (82), and the upper part of the driving disk (81) is provided with a first unloading seat (83), a second unloading seat (84), a third unloading seat (85) and a fourth unloading seat (86) at equal intervals.

5. A lithium battery module welding device according to claim 4, characterized in that: An air pump (16) is arranged inside the operating table (2), an air pump (16) is connected to an air pump pipe (17) above, the air pump pipe (17) is rotatably connected to an adjusting pipe (18) above, the adjusting pipe (18) is connected to first connecting pipes (19) on all sides, and the first connecting pipe (19) is connected to a first control valve (20).

6. A lithium battery module welding device according to claim 4, characterized in that: The first material discharge seat (83), the second material discharge seat (84), the third material discharge seat (85) and the fourth material discharge seat (86) are all provided with adsorption holes (87), and the lower part of the adsorption holes (87) is connected to the suction end of the first connecting pipe (19).

7. A lithium battery module welding device according to claim 5, characterized in that: An air suction pipe (21) is detachably connected above the driving disk (81), and a plurality of air suction heads (22) are arranged on the air suction pipe (21). The air suction pipe (21) is connected to the regulating pipe (18) via a second connecting pipe (23), and a second control valve (24) is arranged on the second connecting pipe (23). One side of the air extraction pump (16) is connected to an exhaust pipe (25), and one end of the exhaust pipe (25) is connected to a purification box (26).

8. A lithium battery module welding device according to claim 5, characterized in that: A limiting slide plate (1701) is provided at one end of the air extraction pipe (17), and a limiting slide groove (1801) adapted to the limiting slide plate (1701) is provided on the regulating pipe (18).

9. A lithium battery module welding method, characterized in that: The method steps specifically include: S1, the first loading robot (3) places the battery on the first loading platform (11) in the discharge seat of the first station below it, and then the loading mechanism (8) rotates 90 degrees counterclockwise and enters the second station. At this time, the first loading robot (3) continues to place the battery to be welded in another discharge seat at the first station; S2: The second loading robot (4) places the electrode on the second loading platform (12) on the battery at the second station below it, and at the same time the welding machine (6) welds the electrode on the battery at the second station, then the loading mechanism (8) rotates 90° counterclockwise and enters the third station, and continues to place the battery to be welded in another unloading seat that enters the first station; S3: The monitoring mechanism (7) observes whether the welding is qualified, and then the unloading robot (5) places the welded batteries in the third station below it onto the first unloading table (13) or the second unloading table (14). After unloading is completed, the loading mechanism (8) rotates 90° counterclockwise again and continues to place the batteries to be welded in another unloading seat that enters the first station.

10. A lithium battery module welding method according to claim 9, characterized in that: In step S3, if the monitoring mechanism (7) observes that the welding is qualified, the unloading robot (5) places the welded battery at the third station below it on the first unloading table (13); if the monitoring mechanism (7) observes that the welding is unqualified, the unloading robot (5) places the welded battery at the third station below it on the second unloading table (14).

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