Battery cell pole column laser welding equipment for energy storage battery module production

Abstract

The invention relates to the technical field of battery module production, and discloses battery cell pole laser welding equipment for energy storage battery module production, which comprises a conveying table, a conveying belt is arranged on the conveying table, the conveying belt is used for conveying energy storage battery modules, and grating sensors are mounted on two sides of one end of the conveying table. The grating sensor is used for detecting the position of the energy storage battery module, a cross beam frame is installed on the inner side of the grating sensor, a three-axis numerical control table is installed on the cross beam frame, and a movable sliding table is installed at the bottom of the three-axis numerical control table. According to the battery cell pole column laser welding equipment for energy storage battery module production, a traditional jig and an overall pressing plate are replaced through visual positioning, conducting strip grabbing and placing of the robot and numerical control point-by-point welding, efficient and high-precision flexible production is achieved, vacuum suction nozzles of different specifications can be rapidly replaced through the pneumatic rapid replacement mechanism and the robot, and the production efficiency is improved. And the conducting strips with different sizes and shapes are sucked by utilizing vacuum negative pressure.

Description

Technical Field

[0001] This invention relates to the field of battery module manufacturing technology, specifically to a laser welding equipment for battery cell terminals used in the production of energy storage battery modules. Background Technology

[0002] In the production of energy storage battery modules, the connection between the cell terminals and the conductive sheets is usually achieved using laser welding. This process has extremely high requirements for the conductivity and reliability of the connection, and is a key step that affects the overall performance and safety of the battery module.

[0003] The existing laser welding equipment for battery cells works as follows: First, an operator or robot places the battery module into a fixture of a specific product model. The cavity on the fixture is used to fix the battery cell, and the conductive sheet is roughly positioned through the clearance hole. Then, a cylinder drives an integral pressure plate covering the entire module to move downward. The bottom surface of the pressure plate is covered with insulating material, thereby pressing the entire row of conductive sheets onto all the battery cell terminals at the same time. Finally, the laser welding head is triggered to complete the welding under the pressed state.

[0004] The existing device structure has the following shortcomings: because the integrated pressure plate and dedicated fixture are customized for a single product, one set of equipment can only be used for one type of product. If different models of battery modules need to be produced, the entire fixture and pressure plate must be disassembled and replaced, a cumbersome process that is time-consuming and impacts production efficiency. Moreover, the high cost of designing and manufacturing specialized fixtures makes it difficult for production lines to cope with the trend of multi-variety, small-batch production.

[0005] Therefore, we propose a laser welding equipment for battery cell terminals used in the production of energy storage battery modules to solve the problems mentioned above. Summary of the Invention

[0006] This invention provides a laser welding equipment for battery cell terminals used in the production of energy storage battery modules. It can solve the problem that the existing integrated pressure plate and special fixtures make it difficult for the production line to cope with the trend of multi-variety and small-batch production.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A laser welding equipment for battery cell terminals used in the production of energy storage battery modules includes a conveyor table with a conveyor belt for conveying the energy storage battery modules. Optical grating sensors are installed on both sides of one end of the conveyor table for position detection of the energy storage battery modules. A crossbeam is installed inside the optical grating sensors, and a three-axis CNC table is installed on the crossbeam. A movable slide is installed at the bottom of the three-axis CNC table. A horizontal drive rail is fixedly connected to the side of the movable slide closest to the conveyor belt. A second drive seat is installed inside the horizontal drive rail, and an electric push rod is fixedly installed on the second drive seat. A lifting seat is fixedly installed at the telescopic end of the electric push rod, and a laser welding head is fixedly installed on the lifting seat. A positioning pressure ring is located directly below the laser welding head, and a guide rod is fixedly connected to the side of the positioning pressure ring. The guide rod is telescopically mounted on the lifting seat. A positioning pressure plate is provided below the positioning pressure ring. A guide groove is provided inside the positioning pressure plate. The width of the guide groove is greater than the diameter of the positioning pressure ring. A support arm is fixedly connected to one end of the moving slide. The end of the support arm away from the moving slide is fixedly connected to one end of the positioning pressure plate. It also includes a visual positioning system and a robot for grasping and placing conductive sheets.

[0008] Preferably, a limiting component is installed on the virtual continuity of the two grating sensors. The limiting component is used to limit the energy storage battery module that has moved to the preset position. Locking components are provided on both sides of the conveyor to lock the energy storage battery module that has reached the set position, so as to facilitate stable welding.

[0009] Preferably, the limiting component includes a limiting rod and a stepper motor. The limiting rod is fixedly connected to the rotating shaft of the stepper motor. A right-angle groove is provided on the inner side of the conveyor table near the conveyor belt and is parallel to the direction of the conveyor belt. The right-angle groove is located in front of the conveyor belt in the conveying direction. The stepper motor is fixedly installed inside the right-angle groove. The stepper motor drives the limiting rod to rotate to the vertical direction of the right-angle groove to limit the energy storage battery module that has moved to the preset position. After the energy storage battery module is welded, the stepper motor drives the limiting rod to rotate and retract into the right-angle groove.

[0010] Preferably, the locking assembly includes friction plates on both sides and an electric telescopic rod. The conveyor table is located on the inner side below the crossbeam frame and has a telescopic groove. The friction plates are slidably connected inside the telescopic groove. The electric telescopic rod is located inside the telescopic groove and is fixedly connected to the conveyor table. The telescopic end of the electric telescopic rod is fixedly connected to the friction plates. The two sets of electric telescopic rods simultaneously push the friction plates to clamp and lock the energy storage battery module, so that it is located in the middle above the conveyor belt.

[0011] Preferably, the three-axis CNC table includes a horizontal drive assembly, a vertical drive assembly, and a vertical lifting assembly. The horizontal drive assembly includes a first sliding seat, a first slide rail is provided inside the upper end of the crossbeam, a threaded rod is rotatably connected inside the first slide rail, the first sliding seat is slidably connected inside the first slide rail, the first sliding seat is threadedly connected to the threaded rod, and a first motor for driving the threaded rod to rotate is installed at one end of the first slide rail.

[0012] Preferably, the vertical lifting assembly includes an electric lifting column, which is fixedly connected to a first sliding seat. A steering motor is installed at the telescopic end of the electric lifting column, which is used to adjust the direction of the longitudinal drive assembly.

[0013] Preferably, the longitudinal drive assembly includes a guide plate with a groove inside. A threaded rod is rotatably connected inside the groove. A second motor is fixedly installed at one end of the guide plate. The shaft of the second motor is fixedly connected to the threaded rod. A movable slide is threadedly connected to the outside of the threaded rod. The shaft of the second motor drives the threaded rod to rotate, thereby driving the movable slide to slide longitudinally.

[0014] Preferably, the visual positioning system is installed on the conveyor platform and close to the grating sensor to identify the positioning coordinates of each cell terminal on the energy storage battery module. Both sides of the conveyor are equipped with conductive sheet grasping and placement robots. Based on the positioning coordinates provided by the vision positioning system, the conductive sheet grasping and placement robots grasp the conductive sheet and accurately place it on the corresponding battery cell terminal.

[0015] Preferably, the machine vision positioning system includes two vision mounting plates, which are respectively mounted on both ends of the crossbeam frame; The two vision mounting plates are respectively equipped with a first industrial camera and a second industrial camera. The field of view of the first industrial camera and the field of view of the second industrial camera can cover all the terminals on the energy storage battery module. The vision mounting plate also integrates a ring light source, which provides illumination for the first industrial camera and the second industrial camera.

[0016] Preferably, the end effector of the conductive sheet grasping and placing robot is a pneumatic quick-change gripper that can be adapted to vacuum nozzles that pick up conductive sheets of different sizes and shapes.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are: In this invention, a conveyor belt transports the energy storage battery module. After the grating sensor detects that the module has reached the preset welding station, a limiting rod in the limiting assembly blocks it horizontally, ensuring the module accurately stops at the welding position. A locking assembly uses two sets of electric telescopic rods to push friction plates on both sides to clamp and lock the module, providing a stable foundation for welding. A vision positioning system is installed on a crossbeam, using a first and second industrial camera under ring light illumination to identify the spatial coordinates of each cell electrode and transmit the coordinate data to a conductive sheet grasping and placing robot. This robot accurately grasps and places the conductive sheet based on the coordinate data. A three-axis CNC table includes a horizontal drive assembly, a vertical drive assembly, and a vertical lifting assembly, which control the precise movement of the laser welding head in the X, Y, and Z dimensions, respectively, to achieve point-by-point clamping and welding. The laser welding head completes the welding with the cooperation of the positioning plate and positioning ring, ensuring that each weld point is in the optimal clamping state and guaranteeing welding quality. This solution replaces physical fixture positioning with visual coordinate positioning, replaces manual placement with precise robot placement, and replaces the "rigid overall pressure plate" with positioning rings and pressure plates, thus realizing the transformation from rigid production to flexible production. It not only eliminates the time and cost of downtime for tooling replacement due to product changes, but also greatly improves equipment utilization and production efficiency. Furthermore, it enables high-precision process control of the welding quality of each weld point, adapting to the needs of modern intelligent manufacturing with multiple varieties and small batches. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a schematic diagram of the left cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 A magnified structural diagram at point A; Figure 4 This is a schematic cross-sectional view of the right side of the present invention; Figure 5 This is a schematic diagram of the laser welding head mounting structure of the present invention; Figure 6 This is a schematic diagram of the energy storage battery module's transport state structure according to the present invention.

[0019] The components include: 1. Conveyor table; 2. Conveyor belt; 3. Crossbeam frame; 4. Moving slide table; 5. Support arm; 6. Grating sensor; 8. First industrial camera; 9. Second industrial camera; 10. Ring light source; 11. Vision mounting plate; 13. Horizontal drive rail; 14. Second drive seat; 15. Electric push rod; 16. Lifting seat; 17. Lateral drive assembly; 18. First sliding seat; 19. First slide rail; 20. Threaded rod one; 21. First... 23. Electric lifting column; 24. Steering motor; 26. Guide plate; 27. Threaded rod II; 28. Second motor; 29. ​​Laser welding head; 30. Positioning pressure ring; 31. Guide rod; 32. Positioning pressure plate; 33. Guide groove; 38. Limiting rod; 39. Stepper motor; 40. Right angle groove; 42. Friction plate; 43. Electric telescopic rod; 44. Telescopic groove; 45. Energy storage battery module; 46. Battery cell terminal; 47. Conductive sheet. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] Example 1: Please see Figure 1-6 The present invention provides a technical solution: A laser welding equipment for cell terminals 46 used in the production of energy storage battery modules 45 includes a conveyor table 1, a conveyor belt 2 on the conveyor table 1 for conveying the energy storage battery modules 45, grating sensors 6 on both sides of one end of the conveyor table 1 for position detection of the energy storage battery modules 45, a crossbeam frame 3 on the inner side of the grating sensors 6, a three-axis CNC table on the crossbeam frame 3, a movable slide table 4 on the bottom of the three-axis CNC table, a horizontal drive rail 13 fixedly connected to the side of the movable slide table 4 near the conveyor belt 2, a second drive seat 14 installed inside the horizontal drive rail 13, an electric push rod 15 fixedly installed on the second drive seat 14, a lifting seat 16 fixedly installed at the telescopic end of the electric push rod 15, a laser welding head 29 fixedly installed on the lifting seat 16, a positioning pressure ring 30 directly below the laser welding head 29, a guide rod 31 fixedly connected to the side of the positioning pressure ring 30, and the guide rod 31 is telescopically mounted on the lifting seat 16; A positioning pressure plate 32 is provided below the positioning pressure ring 30. A guide groove 33 is provided inside the positioning pressure plate 32. The width of the guide groove 33 is greater than the diameter of the positioning pressure ring 30. A support arm 5 is fixedly connected to one end of the movable slide table 4. The end of the support arm 5 away from the movable slide table 4 is fixedly connected to one end of the positioning pressure plate 32. It also includes a visual positioning system and a conductive sheet 47 for grasping and placing robots.

[0022] In the above scheme, firstly, after the grating sensor 6 detects that the energy storage battery module 45 has arrived at the preset station, the conveyor belt 2 carrying the battery module is limited by the limiting component to prevent it from moving forward and restrict it to the welding station. The locking component rigidly fixes it, providing a stable foundation for subsequent welding operations.

[0023] The vision positioning system installed on the crossbeam scans the fixed energy storage battery module 45, identifies and calculates the spatial coordinates of each cell terminal 46; the spatial coordinates are synchronously transmitted to the conductive sheet 47 grasping and placing robot, guiding its end effector to grasp the conductive sheet 47 and accurately place it on the corresponding terminal, ensuring the accuracy of the picking, placing and positioning of the conductive sheet 47.

[0024] After the three-axis CNC table drives the laser welding head 29 to move above the target welding point, the electric push rod 15 pushes the lifting seat 16 and the positioning pressure ring 30 below it to move downward.

[0025] The positioning ring 30 independently presses the single conductive piece 47 to be welded to prevent it from sliding. The positioning ring 30 passes through the guide groove 33 on the positioning plate 32 to press and fix the target welding point, that is, the connection between the conductive piece 47 and the cell electrode 46, to prevent the conductive piece 47 from warping during welding. The method of pressing one piece at a time and welding one point at a time is adopted, which eliminates the rigid pressure plate that needs to be pressed down as a whole. The positioning plate 32 provides a stable and uniform pressing force, and the positioning ring 30 ensures that each welding point is in the best pressing state. Then the laser welding head 29 completes the welding of the point. After the welding is completed, the equipment automatically moves to the next electrode position according to the program and repeats the above process until the welding of the entire module is completed.

[0026] This solution replaces physical fixture positioning with visual coordinate positioning, replaces manual placement with precise robot placement, and replaces the "rigid overall pressure plate" with positioning pressure rings 30 and positioning pressure plates 32, thus realizing the transformation from rigid production to flexible production. It not only eliminates the time and cost of downtime for tooling replacement due to product changes, but also greatly improves equipment utilization and production efficiency. Furthermore, it enables high-precision process control of the welding quality of each weld point, adapting to the needs of modern intelligent manufacturing with multiple varieties and small batches.

[0027] Limiting components are installed on the virtual continuous surface of the two grating sensors 6. The limiting components are used to limit the energy storage battery module 45 when it moves to the preset position. Locking components are provided on both sides of the conveyor table 1 to lock the energy storage battery module 45 when it reaches the set position, so as to facilitate stable welding.

[0028] In the above scheme, the energy storage battery module 45 is transported by the conveyor belt 2. The limiting rod 38 of the limiting component limits and blocks at a set position. When the conveyor belt 2 transports the energy storage battery module 45 to the welding station, the limiting rod 38 blocks the energy storage battery module 45 from moving forward, so that it stops accurately at the predetermined position, completing the initial online limiting. The grating sensors 6 on both sides detect that the energy storage battery module 45 has reached the preset position and send a signal. Then, the locking components located on both sides of the conveyor table 1 are activated to lock the energy storage battery module 45, eliminating its degree of freedom in any direction in the horizontal plane, ensuring that it is provided with a stable and vibration-free rigid foundation during the welding process, which facilitates the accuracy of subsequent visual recognition and laser welding.

[0029] The limiting component includes a limiting rod 38 and a stepper motor 39. The limiting rod 38 is fixedly connected to the rotating shaft of the stepper motor 39. A right-angle groove 40 is provided on the inner side of the conveyor table 1 near the conveyor belt 2 and is parallel to the direction of the conveyor belt 2. The right-angle groove 40 is located in front of the conveyor belt 2 in the conveying direction. The stepper motor 39 is fixedly installed inside the right-angle groove 40. The stepper motor 39 drives the limiting rod 38 to rotate to the vertical direction of the right-angle groove 40 to limit the energy storage battery module 45 that has moved to the preset position. After the energy storage battery module 45 is welded, the stepper motor 39 drives the limiting rod 38 to rotate and retract into the right-angle groove 40.

[0030] In the above scheme, under the default state, the limiting rod 38 is perpendicular to the conveyor table 1 and extends in front of the conveyor belt 2 in the conveying direction to limit the energy storage battery module 45 that arrives at the welding station. After the entire welding process is completed, the stepper motor 39 rotates in the opposite direction, driving the limit rod 38 to retract into the right-angle slot 40, making way for the energy storage battery module 45 to flow out, which greatly improves production efficiency and adaptability to modules of different sizes.

[0031] The locking assembly includes two friction plates 42 and an electric telescopic rod 43. The conveyor table 1 is located on the inner side below the crossbeam frame 3 and has a telescopic groove 44. The friction plates 42 are slidably connected inside the telescopic groove 44. The electric telescopic rod 43 is located inside the telescopic groove 44 and is fixedly connected to the conveyor table 1. The telescopic end of the electric telescopic rod 43 is fixedly connected to the friction plates 42. The two sets of electric telescopic rods 43 simultaneously push the friction plates 42 to lock the energy storage battery module 45, so that it is located in the middle above the conveyor belt 2.

[0032] During operation, after receiving a signal that the energy storage battery module 45 has been positioned, the two sets of electric telescopic rods 43 installed inside the telescopic groove 44 of the conveyor 1 move simultaneously. Their telescopic ends push the friction plates 42 on both sides to extend synchronously along the telescopic groove 44 towards both sides of the battery module. This causes the friction plates 42 to come into contact with the energy storage battery module 45, and uses friction to completely lock it in the predetermined position at the center of the conveyor belt 2.

[0033] This overcomes the slight slippage or vibration that may occur on the conveyor belt 2, ensuring that the energy storage battery module 45 does not move slightly during the visual scanning of the visual positioning system, the placement of the conductive sheet 47, and the laser welding process, thereby ensuring the positional stability of high-precision welding.

[0034] Example 2: Please see Figure 1-6 Furthermore, in conjunction with Example 1, we obtain that, The three-axis CNC table includes a horizontal drive assembly 17, a vertical drive assembly, and a vertical lifting assembly. The horizontal drive assembly 17 includes a first sliding seat 18. A first slide rail 19 is provided inside the upper end of the crossbeam frame 3. A threaded rod 20 is rotatably connected inside the first slide rail 19. The first sliding seat 18 is slidably connected inside the first slide rail 19. The first sliding seat 18 is threadedly connected to the threaded rod 20. A first motor 21 that drives the threaded rod 20 to rotate is installed at one end of the first slide rail 19.

[0035] The lateral drive assembly 17 is used to control the lateral movement of the laser welding head 29. The first motor 21 drives the threaded rod 20 to rotate, causing the first sliding seat 18 to slide horizontally along the first slide rail 19 on the crossbeam frame 3, thereby driving the entire welding actuator to move laterally and accurately position it to the column position where the target cell electrode post 46 is located.

[0036] The vertical lifting assembly includes an electric lifting column 23, which is fixedly connected to the first sliding seat 18. The telescopic end of the electric lifting column 23 is equipped with a steering motor 24, which is used to adjust the direction of the longitudinal drive assembly.

[0037] The vertical lifting assembly controls the lifting and lowering movement of the welding head. The extension and retraction of the electric lifting column 23 drives the laser welding head 29 and the positioning pressure ring 30 at its end to move vertically, thereby realizing the lifting and lowering of the welding head and controlling the clamping force of the positioning pressure ring 30. The steering motor 24 can drive the upper longitudinal drive assembly to rotate horizontally, thereby adjusting the feed angle of the welding head so that it can approach the weld point at different positions with the best posture.

[0038] The longitudinal drive assembly includes a guide plate 26, with a groove inside the guide plate 26. A threaded rod 27 is rotatably connected inside the groove. A second motor 28 is fixedly installed at one end of the guide plate 26. The shaft of the second motor 28 is fixedly connected to the threaded rod 27. The movable slide 4 is threadedly connected to the outside of the threaded rod 27. The shaft of the second motor 28 drives the threaded rod 27 to rotate, thereby driving the movable slide 4 to slide longitudinally.

[0039] The longitudinal drive component controls the longitudinal movement of the welding head. The second motor 28 drives the threaded rod 27 to rotate, causing the movable slide 4 on the threaded rod 27 to slide longitudinally along the groove in the guide plate 26, thereby driving the laser welding head 29 to move along the length of the battery module and accurately position it to the row position of the target cell terminal 46.

[0040] The visual positioning system is installed on the conveyor 1 and close to the grating sensor 6 to identify the positioning coordinates of each cell terminal 46 on the energy storage battery module 45. Both sides of the conveyor 1 are equipped with conductive sheet 47 gripping and placement robots. Based on the positioning coordinates provided by the vision positioning system, the conductive sheet 47 gripping and placement robots grip the conductive sheet 47 and accurately place it on the corresponding battery cell terminal 46.

[0041] The vision positioning system and the robot work together to accurately place the conductive sheet 47. The vision positioning system first identifies the coordinates of each pole on the module, and then transmits the coordinate data to the robot that grasps and places the conductive sheet 47. The robot controls the end effector to grasp the conductive sheet 47 according to the coordinate data and accurately places it on the corresponding pole, achieving high-precision automatic alignment.

[0042] The machine vision positioning system includes two vision mounting plates 11, which are respectively mounted on both ends of the crossbeam frame 3; Two vision mounting plates 11 are respectively equipped with a first industrial camera 8 and a second industrial camera 9. The field of view of the first industrial camera 8 and the field of view of the second industrial camera 9 can cover all the terminals on the energy storage battery module 45. The vision mounting plate 11 also integrates a ring light source 10, which provides illumination for the first industrial camera 8 and the second industrial camera 9.

[0043] The first industrial camera 8 and the second industrial camera 9, installed at both ends of the crossbeam frame 3, simultaneously acquire module images under the illumination of the ring light source 10. The fields of view of the first industrial camera 8 and the second industrial camera 9 cover all poles, and the spatial coordinates of each pole can be quickly and accurately obtained through image processing, providing a positioning reference for subsequent operations.

[0044] The end effector of the robot that grips and places conductive sheet 47 is a pneumatic quick-change gripper that can be adapted to vacuum nozzles that pick up conductive sheet 47 of different sizes and shapes.

[0045] With the pneumatic quick-change mechanism, the robot can quickly change vacuum nozzles of different specifications and use vacuum negative pressure to pick up conductive sheets 47 of different sizes and shapes. This design enables a single robot to adapt to a variety of products and improves the production flexibility of the equipment.

[0046] The working principle of the laser welding equipment for the battery cell terminals 46 used in the production of the energy storage battery module 45 is as follows: First, the conveyor belt 2 carrying the battery module is stopped horizontally by the limiting rod 38 of the limiting component after the grating sensor 6 detects that the module has reached the preset station, so that it stops accurately at the welding station. Then, the two sets of electric telescopic rods 43 of the locking component move synchronously, pushing the friction plates 42 on both sides to clamp and lock the module in the center of the conveyor belt 2, providing a stable welding foundation. The vision positioning system installed on the crossbeam then scans the fixed module. The first industrial camera 8 and the second industrial camera 9 identify and calculate the spatial coordinates of each battery cell terminal 46 under the illumination of the ring light source 10. The spatial coordinate data is synchronously transmitted to the conductive sheet 47 grasping and placement robot on both sides, guiding its pneumatic quick-change gripper to adapt to the corresponding vacuum nozzle, grasp the conductive sheet 47 and accurately place it on the corresponding terminal.

[0047] After the conductive sheet 47 is placed, the three-axis CNC table begins to work: the first motor 21 of its horizontal drive assembly 17 drives the threaded rod 20 to rotate, which in turn moves the first sliding seat 18 and the entire welding mechanism laterally, positioning it in the column where the target electrode is located; the second motor 28 of the vertical drive assembly drives the threaded rod 27 to rotate, which in turn moves the moving slide 4 and the laser welding head 29 longitudinally, positioning it in the row where the target electrode is located; the electric lifting column 23 of the vertical lifting assembly drives the laser welding head 29 to descend, independently pressing the single conductive sheet 47 to be welded through the positioning pressure plate 32. After positioning, the electric push rod 15 pushes the lifting seat 16 and the positioning pressure ring 30 to move downward. The positioning pressure ring 30 passes through the guide groove 33 of the positioning pressure plate 32 to press the connection between the battery cell electrode 46 and the conductive sheet 47. Then the laser welding head 29 completes the welding at this point.

[0048] The equipment automatically moves to the next pole position according to the program, repeating the above point-by-point pressing and welding process until the entire module is welded. This solution replaces traditional jigs and integral pressure plates with visual positioning, a robot for grasping and placing conductive sheets 47, and CNC point-by-point welding, achieving efficient and high-precision flexible production.

[0049] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A laser welding device for cell terminals (46) used in the production of energy storage battery modules (45), comprising a conveyor table (1) and a conveyor belt (2) disposed on the conveyor table (1), characterized in that: The conveyor belt (2) is used for conveying the energy storage battery module (45). A grating sensor (6) is installed on both sides of one end of the conveyor table (1). The grating sensor (6) is used for position detection of the energy storage battery module (45). A crossbeam frame (3) is installed inside the grating sensor (6). A three-axis CNC table is installed on the crossbeam frame (3). A movable slide table (4) is installed at the bottom of the three-axis CNC table. A horizontal drive rail (13) is fixedly connected to the side of the movable slide table (4) closest to the conveyor belt (2). The moving guide rail (13) is equipped with a second drive seat (14), and an electric push rod (15) is fixedly installed on the second drive seat (14). A lifting seat (16) is fixedly installed on the telescopic end of the electric push rod (15). A laser welding head (29) is fixedly installed on the lifting seat (16). A positioning pressure ring (30) is provided directly below the laser welding head (29). A guide rod (31) is fixedly connected to the side of the positioning pressure ring (30). The guide rod (31) is telescopically installed on the lifting seat (16). A positioning pressure plate (32) is provided below the positioning pressure ring (30). A guide groove (33) is provided inside the positioning pressure plate (32). The width of the guide groove (33) is greater than the diameter of the positioning pressure ring (30). A support arm (5) is fixedly connected to one end of the moving slide (4). The end of the support arm (5) away from the moving slide (4) is fixedly connected to one end of the positioning pressure plate (32). It also includes a visual positioning system and a conductive sheet (47) for grasping and placing robots.

2. The laser welding equipment for cell terminals (46) used in the production of energy storage battery modules (45) according to claim 1, characterized in that: The visual positioning system is installed on the crossbeam frame (3) and close to the grating sensor (6) to identify the positioning coordinates of each cell terminal (46) on the energy storage battery module (45); Both sides of the conveyor (1) are equipped with conductive sheet (47) grasping and placing robots. The conductive sheet (47) grasping and placing robots grasp the conductive sheet (47) according to the positioning coordinates provided by the visual positioning system and accurately place it on the corresponding battery cell terminal (46). Limiting components are installed on the virtual continuity of the two grating sensors (6). The limiting components are used to limit the energy storage battery module (45) that has moved to the preset position. Locking components are provided on both sides of the conveyor (1) to lock the energy storage battery module (45) that has reached the set position, so as to facilitate stable welding.

3. The laser welding equipment for cell terminals (46) used in the production of energy storage battery modules (45) according to claim 2, characterized in that: The limiting component includes a limiting rod (38) and a stepper motor (39). The limiting rod (38) is fixedly connected to the rotating shaft of the stepper motor (39). The conveyor table (1) has a right-angle groove (40) on the inner side near the conveyor belt (2) and is parallel to the direction of the conveyor belt (2). The right-angle groove (40) is located in front of the conveyor belt (2) in the conveying direction. The stepper motor (39) is fixedly installed inside the right-angle groove (40). The stepper motor (39) drives the limiting rod (38) to rotate to the vertical direction of the right-angle groove (40) to limit the energy storage battery module (45) that has moved to the preset position. After the energy storage battery module (45) is welded, the stepper motor (39) drives the limiting rod (38) to rotate and retract into the right-angle groove (40).

4. The laser welding equipment for cell terminals (46) used in the production of energy storage battery modules (45) according to claim 2, characterized in that: The locking assembly includes two friction plates (42) and an electric telescopic rod (43). The conveyor table (1) is located on the inner side below the crossbeam frame (3) and has a telescopic groove (44). The friction plates (42) are slidably connected inside the telescopic groove (44). The electric telescopic rod (43) is located inside the telescopic groove (44) and is fixedly connected to the conveyor table (1). The telescopic end of the electric telescopic rod (43) is fixedly connected to the friction plates (42). The two sets of electric telescopic rods (43) simultaneously push the friction plates (42) to lock the energy storage battery module (45) so that it is located in the middle above the conveyor belt (2).

5. The laser welding equipment for cell terminals (46) used in the production of energy storage battery modules (45) according to claim 1, characterized in that: The three-axis CNC table includes a horizontal drive assembly (17), a vertical drive assembly, and a vertical lifting assembly. The horizontal drive assembly (17) includes a first sliding seat (18). A first slide rail (19) is provided inside the upper end of the crossbeam frame (3). A threaded rod (20) is rotatably connected inside the first slide rail (19). The first sliding seat (18) is slidably connected inside the first slide rail (19). The first sliding seat (18) is threadedly connected to the threaded rod (20). A first motor (21) that drives the threaded rod (20) to rotate is installed at one end of the first slide rail (19).

6. The laser welding equipment for cell terminals (46) used in the production of energy storage battery modules (45) according to claim 5, characterized in that: The vertical lifting assembly includes an electric lifting column (23), which is fixedly connected to a first sliding seat (18). The telescopic end of the electric lifting column (23) is equipped with a steering motor (24), which is used to adjust the direction of the longitudinal drive assembly.

7. The laser welding equipment for cell terminals (46) used in the production of energy storage battery modules (45) according to claim 6, characterized in that: The longitudinal drive assembly includes a guide plate (26), a groove is provided inside the guide plate (26), and a threaded rod (27) is rotatably connected inside the groove. A second motor (28) is fixedly installed at one end of the guide plate (26). The shaft of the second motor (28) is fixedly connected to the threaded rod (27). The movable slide (4) is threaded to the outside of the threaded rod (27). The shaft of the second motor (28) drives the threaded rod (27) to rotate, thereby driving the movable slide (4) to slide longitudinally.

8. The laser welding equipment for cell terminals (46) used in the production of energy storage battery modules (45) according to claim 1, characterized in that: The machine vision positioning system includes two vision mounting plates (11), which are respectively installed at both ends of the crossbeam frame (3).

9. The laser welding equipment for cell terminals (46) used in the production of energy storage battery modules (45) according to claim 8, characterized in that: The two vision mounting plates (11) are respectively equipped with a first industrial camera (8) and a second industrial camera (9). The field of view of the first industrial camera (8) and the field of view of the second industrial camera (9) can cover all the poles on the energy storage battery module (45). The vision mounting plate (11) also integrates a ring light source (10), which provides illumination for the first industrial camera (8) and the second industrial camera (9).

10. A laser welding equipment for cell terminals (46) used in the production of energy storage battery modules (45) according to claim 1 or 9, characterized in that: The end effector of the robot that grips and places the conductive sheet (47) is a pneumatic quick-change gripper that can be adapted to vacuum nozzles that pick up conductive sheets (47) of different sizes and shapes.

Images