Laser welding apparatus for energy storage power supply cell sheet stack assembly

Abstract

This laser welding equipment for stacking and assembling energy storage power cell cells relates to the field of welding equipment technology. It includes a cell conveying module, a stacking positioning module, an adaptive clamping module, and a laser spot welding module. The stacking positioning module features a stacking hopper with an ejector mechanism, which, together with a side-push positioning plate, completes the centering and layer-by-layer stacking of the cells. A counting and recognition camera and a counting display control box precisely control the number of stacked layers. The conveying module is equipped with loading and unloading conveying components to achieve automatic cell loading and stacking and smooth unloading of the entire stack. The adaptive clamping module can adaptively clamp the workpiece at multiple angles, effectively preventing displacement during the welding process. The laser welding module relies on a multi-axis robotic arm with a rotating structure to complete omnidirectional spot laser welding of the cells. This invention features a high degree of automation, high stacking positioning accuracy, smooth loading and unloading flow, stable and reliable clamping, and can eliminate welding blind spots, effectively improving the welding quality and assembly efficiency of the cells.

Description

Technical Field

[0001] This invention relates to the field of battery cell assembly and welding equipment, and more specifically to laser welding equipment for stacking and assembling energy storage power battery cells. Background Technology

[0002] With the rapid development of the energy storage industry, the demand for energy storage power supply capacity continues to rise. As the core component of energy storage power supply, the quality of the stacking assembly and welding of battery cells directly determines the overall performance, structural stability and service life of the energy storage power supply.

[0003] At present, the assembly and processing of energy storage battery cells mostly rely on manual labor and simple tooling to complete stacking, positioning and welding operations. The degree of automation is low and it is difficult to adapt to the pace of large-scale mass production.

[0004] Existing processing equipment has revealed many practical drawbacks in actual production applications. Traditional stacking fixtures can only perform simple support and placement, and cannot perform all-round centering and correction of multi-layer solar cells. Problems such as offset, misalignment, and poor flatness between layers are very likely to occur during the stacking process. Manual counting of stacked layers has a large error, and it is very easy to have too many or too few stacks, which seriously affects the accuracy of subsequent welding and assembly. Conventional conveying mechanisms have a simple structure and can only realize unidirectional transfer of solar cells. They cannot match the segmented operation requirements of stacking solar cells layer by layer and unloading finished products in whole stacks. The process connection is not smooth, and the transfer process is prone to damage to solar cells and positional offset, resulting in low production flow efficiency.

[0005] Meanwhile, traditional clamping and fixing structures have poor versatility and cannot be adapted to clamping and positioning of battery cells of different specifications and sizes. During the welding process, the battery cells are prone to loosening and slippage, which can lead to welding defects such as incomplete welding, missing welding, and welding position misalignment. Ordinary welding equipment has a fixed welding angle and a large number of welding blind spots, making it impossible to complete multi-point welding of battery cells, resulting in inconsistent welding quality.

[0006] In addition, the existing assembly and welding equipment has a scattered layout of functional components, insufficient integration and modularity, high debugging and maintenance difficulty, cumbersome operation process, difficulty in adapting to the processing needs of different types of energy storage cells, weak overall production process control, and many manual intervention links, which can easily introduce human pollution and workpiece damage, thus restricting the improvement of the yield rate of energy storage cell assembly and processing and the overall production efficiency.

[0007] Therefore, there is an urgent need to develop a dedicated stacking assembly laser welding equipment with a high degree of automation, precise positioning, smooth conveying, stable clamping, and comprehensive welding capabilities. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a laser welding device for stacking and assembling energy storage power cell cells, which solves problems such as poor stacking accuracy, low conveying efficiency, and unstable welding quality in the traditional energy storage power cell cell stacking and welding process.

[0009] To achieve the above objectives, the present invention provides the following technical solution: Laser welding equipment for stacking and assembling energy storage power cell cells includes a cell conveying module, a stacking positioning module, an adaptive clamping module, and a laser spot welding module.

[0010] As an optimized solution, the stacking positioning module includes a stacking hopper, which is a square box with an open top and a closed, grounded bottom.

[0011] As an optimized solution, the stacking hopper is equipped with a cell ejection mechanism, which includes a vertical ejection telescopic cylinder. The lower end of the ejection telescopic cylinder is fixed at the center of the inner bottom surface of the stacking hopper, and a horizontal square ejection plate is fixed at the upper telescopic end of the ejection telescopic cylinder.

[0012] As an optimized solution, four centrally symmetrical side-push positioning plates are telescopically installed on the inner side wall of the middle section of the stacked silo.

[0013] As an optimized solution, a square feeding port is provided on one longitudinal side wall of the stacked silo, and a square unloading port is provided on one transverse side wall of the stacked silo.

[0014] As an optimized solution, the battery cell conveying module includes a feeding conveying component positioned opposite the feeding port and a discharging conveying component positioned opposite the discharging port.

[0015] As an optimized solution, the adaptive clamping module includes a hinged base, a telescopic swing arm rotatably mounted inside the hinged base, a clamping limiting plate telescopically mounted on the upper half of the telescopic swing arm, the clamping limiting plate being a U-shaped plate with a longitudinal opening, and three vertical strip clamping plates telescopically mounted on the longitudinal inner wall and two transverse inner walls of the clamping limiting plate, respectively.

[0016] As an optimized solution, the laser spot welding module includes a steering base, on the upper surface of which a multi-axis robotic arm is rotatably mounted, and a laser welding machine is fixed at the end of the multi-axis robotic arm.

[0017] As an optimized solution, the feeding connection port is located above the four side-push positioning plates.

[0018] As an optimized solution, the feeding and conveying assembly includes a feeding and conveying frame, which is an inverted L-shaped frame. The end of the vertical part of the feeding and conveying frame is grounded, and the end of the horizontal part of the feeding and conveying frame is positioned opposite the feeding connection port and fixed to the longitudinal outer wall of the stacking hopper.

[0019] As an optimized solution, the feeding and conveying assembly further includes two feeding and conveying rollers, one of which is rotatably mounted between the transverse inner walls of the horizontal portion of the feeding and conveying frame, and the other feeding and conveying roller passes through the feeding connection and is rotatably mounted on the transverse inner wall of the stacking bin.

[0020] As an optimized solution, a feeding conveyor belt is sleeved between the two feeding conveyor rollers, and the end of the feeding conveyor belt extending into the interior of the stacking bin is set close to the side edge of the square top plate.

[0021] As an optimized solution, a feeding conveyor motor is fixed on the transverse outer wall of the feeding conveyor frame, and the output shaft end of the feeding conveyor motor is connected to the corresponding feeding conveyor roller for transmission.

[0022] As an optimized solution, the feeding and conveying assembly also includes two laterally symmetrical side clamp conveyors, which are telescopically mounted on the transverse inner wall of the stacking hopper.

[0023] As an optimized solution, each of the side clamp conveyor frames is provided with a side clamp conveyor belt, and the two side clamp conveyor belts are located on one side above the feeding conveyor belt.

[0024] As an optimized solution, the material discharge port is located below the four side-push positioning plates.

[0025] The material feeding and conveying assembly includes a material feeding and conveying frame, which is an L-shaped frame that extends laterally and is laid flat.

[0026] As an optimized solution, the end of the vertical section of the unloading conveyor is grounded, and the end of the horizontal section of the unloading conveyor is positioned opposite the unloading connection port and fixed to the transverse side wall of the stacking hopper.

[0027] As an optimized solution, the unloading and conveying assembly further includes a first limiting frame and a second limiting frame. Both the first limiting frame and the second limiting frame are horizontally arranged square frames. The first limiting frame is located inside the stacking hopper, and the second limiting frame is located between the unloading and conveying frames.

[0028] As an optimized solution, the size of the first limiting frame is slightly larger than the size of the square top plate.

[0029] As an optimized solution, a plurality of short feeding conveyor rollers are rotatably installed on each longitudinal outer wall of the first limiting frame, and the ends of the short feeding conveyor rollers are rotatably supported on the longitudinal inner wall of the stacking bin.

[0030] As an optimized solution, several short feeding conveyor rollers are also rotatably installed on each longitudinal outer wall of the second limiting frame, and the ends of the short feeding conveyor rollers are rotatably supported on the longitudinal inner wall of the feeding conveyor frame.

[0031] As an optimized solution, several feeding conveying rollers are respectively provided on the lateral sides of the first limiting frame, and the two ends of the feeding conveying rollers are respectively rotatably installed on the longitudinal inner wall of the stacking bin.

[0032] As an optimized solution, several feeding conveying rollers are also provided on both sides of the second limiting frame, and the two ends of the feeding conveying rollers are respectively rotatably installed on the longitudinal inner wall of the feeding conveying frame.

[0033] As an optimized solution, a transmission box is fixed on each longitudinal outer wall of the feeding conveyor frame. The end of the transmission box extends laterally to the longitudinal outer wall of the stacking hopper. A sprocket transmission mechanism is provided inside the transmission box, and the sprocket transmission mechanism is connected and driven by each feeding conveyor short roller and feeding conveyor long roller.

[0034] As an optimized solution, a feeding conveyor motor is fixed on the lower end face of each of the transmission boxes, and the feeding conveyor motor is connected to the sprocket transmission mechanism for transmission.

[0035] As an optimized solution, an integrated support platform is provided directly below the second limiting frame. The integrated support platform is a C-shaped seat that extends longitudinally and faces downwards, and the lower end of the integrated support platform is grounded.

[0036] As an optimized solution, a steering drive motor is fixed in the middle of the lower surface of the integrated support platform, the output shaft of the steering drive motor passes upward through the integrated support platform and is fixed with a steering disk, and a vertical lifting and telescopic cylinder is fixed at the center of the upper surface of the steering disk.

[0037] As an optimized solution, the upper telescopic end of the lifting telescopic cylinder is fixed with a horizontal circular support plate, which can pass through the second limiting frame by lifting.

[0038] As an optimized solution, the hinged base is located on the longitudinal side of the unloading conveyor and its lower end is welded to the upper surface of the integrated support platform.

[0039] As an optimized solution, a swing drive motor is fixed on the transverse outer wall of the hinge base, and the output shaft end of the swing drive motor passes through the side wall of the hinge base and is fixed to the bottom side end face of the telescopic swing arm.

[0040] As an optimized solution, a square side plate is welded to the longitudinal side wall near the upper end of the telescopic swing arm. Two transversely symmetrical electrically controlled telescopic cylinders are fixed on the front side wall of the square side plate, and a telescopic control unit electrically connected to the electrically controlled telescopic cylinders is fixed on the back side wall of the square side plate. The telescopic ends of the two electrically controlled telescopic cylinders are fixed to the back of the clamping limit plate.

[0041] As an optimized solution, the steering base is located on the opposite side of the hinged base and its lower end is also welded to the upper surface of the integrated support platform.

[0042] As an optimized solution, a detachable horizontal cover is installed at the upper end of the stacked silo. A counting and display control box is fixed on the upper surface of the horizontal cover, and a counting and recognition camera is fixed on the lower surface of the horizontal cover. The counting and recognition camera is electrically connected to the counting and display control box.

[0043] As an optimized solution, a positioning telescopic cylinder is provided between the back of the side-push positioning plate and the inner peripheral wall of the stacking hopper. The fixed end of the positioning telescopic cylinder is fixed to the inner peripheral wall of the stacking hopper, and the telescopic end of the positioning telescopic cylinder is fixed to the back of the side-push positioning plate.

[0044] As an optimized solution, a square-shaped positioning control box is fixed on the outer peripheral wall of the stacked hopper, and the positioning control box is electrically connected to each positioning telescopic cylinder.

[0045] Compared with the prior art, the beneficial effects of the present invention are: 1. Accurate and reliable stacking positioning ensures basic precision. The stacking positioning module achieves high-precision stacking of solar cells through multi-structure collaboration: the counting and recognition camera and the counting display and control box work together to capture the arrival signal of the solar cells in real time and record the stacking quantity, accurately controlling the total number of stacked solar cells and effectively avoiding the problems of over-stacking, under-stacking, or layer errors that are easy to occur with manual counting; four centrally symmetrical side-push positioning plates, driven by positioning telescopic cylinders, clamp the stacked solar cells synchronously from all sides toward the center, which can forcibly correct the placement position of the solar cells, ensuring that each layer of solar cells is in the center of the stacking hopper, ensuring the coaxiality of multi-layer solar cell stacking, and avoiding misalignment of subsequent welding joints due to solar cell offset; the ejection telescopic cylinder drives the square ejection plate to descend in stages, and works with the feeding and conveying components to realize the layer-by-layer stacking of individual solar cells, making the solar cell stacking process orderly and controllable, and the resulting stacked solar cells have high flatness, laying a good assembly foundation for subsequent welding processes.

[0046] 2. The conveying process is smooth and efficient, enabling seamless workflow. The cell conveying module adopts a segmented and targeted conveying structure design to automate the process from individual cell loading to overall unloading after stacking. In the loading stage, the loading conveyor belt is responsible for the initial conveying of cells, and the side clamping conveyor frame clamps individual cells through the side clamping conveyor belt and accurately transfers them to the square top plate, replacing manual handling and placement. This not only reduces the intensity of manual labor but also avoids cell collisions or positional deviations caused by manual operation. In the unloading stage, the unloading conveyor short rollers and long rollers work together to smoothly receive and transport the stacked cells outward. With the lifting telescopic cylinder and steering drive motor on the integrated support platform, the stacked cells can be quickly transferred between the conveying and welding stations without manual transfer, significantly shortening the process connection time. The entire conveying process requires no manual intervention and can continuously complete the stacking and conveying of multiple sets of cells, significantly improving the overall operating efficiency of the equipment.

[0047] 3. Adaptive clamping and omnidirectional welding ensure stable welding quality. The combination of the adaptive clamping module and the laser spot welding module effectively solves the welding defect problem caused by the displacement of stacked solar cells during the welding process: the clamping and limiting plate has a U-shaped structure, which, together with three strip clamping plates, can adaptively clamp the stacked solar cells from multiple directions, both longitudinally and laterally. It can fit and fix the stacked solar cells according to their actual size, avoiding loosening, displacement, or deformation of the solar cells during welding, and ensuring the accuracy of the welding point. The multi-axis robotic arm drives the laser welding machine to move precisely to the welding point of the stacked solar cells according to a preset path, realizing spot welding. The steering drive motor can drive the stacked solar cells to rotate 90° to switch the welding position, so that the welding points on all sides of the stacked solar cells can be covered, realizing all-round welding and avoiding welding blind spots. The application of the laser welding machine, combined with stable clamping and positioning, can ensure the consistency of the welded joint, reduce defects such as incomplete welding, missed welding, or weld misalignment, and improve the structural strength and sealing of the stacked solar cells after welding.

[0048] 4. Modular design and integrated control enhance equipment operation convenience and adaptability. This equipment adopts a modular design, with each module—cell conveying, stacking and positioning, adaptive clamping, and spot welding—functioning independently yet working in tandem. This facilitates installation, commissioning, daily maintenance, and troubleshooting. The actions of each module are centrally controlled by the electrical control system, eliminating the need for complex manual adjustments. The overall structure is adaptable to different specifications of energy storage cells, possessing a degree of versatility and meeting diverse production needs.

[0049] 5. The entire process is closed-loop and controllable, reducing quality risks during production. From cell loading, stacking, and positioning to clamping, welding, and unloading, the equipment forms a complete closed-loop operation. The status of each process can be fed back through the electronic control system or observed intuitively, which facilitates real-time monitoring of the production process by operators. The cells are in a mechanically positioned or clamped state throughout the stacking and welding process, reducing the number of manual contact with the cells and avoiding contamination or damage to the cells caused by manual operation. This helps to ensure the pass rate of the final stacked cells. Attached Figure Description

[0050] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0051] Figure 1 This is a schematic diagram of the overall external structure of the present invention in the main viewing direction; Figure 2 This is a schematic diagram of the overall external structure of the present invention from a top-down perspective; Figure 3 This is a schematic diagram of the overall external structure of the present invention from the right-side view direction; Figure 4 This is an isometric schematic diagram of the three-dimensional structure of the present invention; Figure 5 For the present invention along Figure 2 A schematic diagram of the internal structure cut along line AA. Figure 6 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the middle BB line; Figure 7 For the present invention along Figure 3 A three-dimensional half-section diagram cut along the CC line.

[0052] In the diagram: 1-Stacking hopper, 2-Horizontal cover plate, 3-Counting and display control box, 4-Counting and recognition camera, 5-Ejection telescopic cylinder, 6-Square ejection plate, 7-Side push positioning plate, 8-Positioning telescopic cylinder, 9-Positioning control box, 10-Feeding connection port, 11-Discharge connection port, 12-Feeding conveyor frame, 13-Feeding conveyor roller, 14-Feeding conveyor belt, 15-Feeding conveyor motor, 16-Side clamping conveyor frame, 17-Side clamping conveyor belt, 18-Discharge conveyor frame, 19-First limit frame, 20-Second limit frame, 21-Discharge 21-Short conveyor roller, 22-Long unloading conveyor roller, 23-Transmission box, 24-Unloading conveyor motor, 25-Integrated support platform, 26-Steering drive motor, 27-Steering disc, 28-Lifting telescopic cylinder, 29-Circular pallet, 30-Hinged base, 31-Telescopic swing arm, 32-Swing drive motor, 33-Square side plate, 34-Electrically controlled telescopic cylinder, 35-Telescopic control unit, 36-Clamping limit plate, 37-Strip clamping plate, 38-Steering base, 39-Multi-axis robotic arm, 40-Laser welding machine, 41-Central control panel. Detailed Implementation

[0053] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0054] like Figures 1 to 7 As shown, the laser welding equipment for stacking and assembling energy storage power cell cells includes a cell conveying module, a stacking positioning module, an adaptive clamping module, and a laser spot welding module.

[0055] The stacking positioning module includes a stacking bin 1, which is a square box with an open top. The bottom of the stacking bin 1 is closed and grounded. A removable horizontal cover 2 is installed on the top of the stacking bin 1. A counting and display control box 3 is fixed on the upper surface of the horizontal cover 2, and a counting and recognition camera 4 is fixed on the lower surface of the horizontal cover 2. The counting and recognition camera 4 is used to capture the battery cell positioning signal and perform image recognition counting. The counting and display control box 3 is electrically connected to the counting and recognition camera 4 and is used to receive and display the counting data and control the number of stacking layers.

[0056] The stacking hopper 1 is equipped with a cell ejection mechanism, which includes a vertical ejection telescopic cylinder 5. The lower end of the ejection telescopic cylinder 5 is fixed at the center of the inner bottom surface of the stacking hopper 1, and a horizontal square ejection plate 6 is fixed at the upper telescopic end of the ejection telescopic cylinder 5.

[0057] The stacking positioning module also includes four centrally symmetrical side-push positioning plates 7. The four side-push positioning plates 7 are located in the middle of the stacking hopper 1. A positioning telescopic cylinder 8 is provided between the back of the side-push positioning plate 7 and the inner peripheral wall of the stacking hopper 1. The fixed end of the positioning telescopic cylinder 8 is fixed to the inner peripheral wall of the stacking hopper 1, and the telescopic end of the positioning telescopic cylinder 8 is fixed to the back of the side-push positioning plate 7.

[0058] A square-shaped positioning control box 9 is fixed on the outer perimeter wall of the stacking silo 1. The positioning control box 9 is electrically connected to each positioning telescopic cylinder 8.

[0059] The cell conveying module includes a feeding conveyor assembly and a discharging conveyor assembly.

[0060] A square feeding port 10 is provided on one longitudinal side wall of the stacking hopper 1, and the feeding port 10 is located above the four side-push positioning plates 7. A square discharging port 11 is provided on one transverse side wall of the stacking hopper 1, and the discharging port 11 is located below the four side-push positioning plates 7.

[0061] The feeding and conveying assembly includes a feeding and conveying frame 12, which is an inverted L-shaped frame. The end of the vertical part of the feeding and conveying frame 12 is grounded, and the end of the horizontal part of the feeding and conveying frame 12 is positioned opposite the feeding and connecting port 10 and fixed to the longitudinal outer wall of the stacking hopper 1.

[0062] The feeding conveying assembly also includes two feeding conveying rollers 13, one of which is rotatably mounted between the transverse inner walls of the horizontal portion of the feeding conveying frame 12, and the other feeding conveying roller 13 passes through the feeding connection port 10 and is rotatably mounted on the transverse inner wall of the stacking bin 1.

[0063] A feeding conveyor belt 14 is sleeved between the two feeding conveyor rollers 13. The feeding conveyor belt 14 extends into the stacking bin 1 and is set close to the side edge of the square top plate 6.

[0064] A feeding conveyor motor 15 is fixed on the transverse outer wall of the feeding conveyor frame 12, and the end of the output shaft of the feeding conveyor motor 15 is connected to the corresponding feeding conveyor roller 13 for transmission.

[0065] The feeding and conveying assembly also includes two transversely symmetrical side clamp conveyor frames 16, which are telescopically installed on the transverse inner wall of the stacking bin 1 and driven by a hydraulic telescopic cylinder.

[0066] Each side clamp conveyor frame 16 is equipped with a side clamp conveyor belt 17 that rolls within it, and the two side clamp conveyor belts 17 are located on one side above the feeding conveyor belt 14.

[0067] The unloading conveying assembly includes an unloading conveying frame 18, which is an L-shaped frame that extends laterally and is laid flat.

[0068] The vertical part of the unloading conveyor 18 is grounded at its end, and the horizontal part of the unloading conveyor 18 is positioned opposite the unloading connection port 11 and fixed to the transverse side wall of the stacking hopper 1.

[0069] The unloading conveying assembly also includes a first limiting frame 19 and a second limiting frame 20. Both the first limiting frame 19 and the second limiting frame 20 are horizontally arranged square frames. The first limiting frame 19 is located inside the stacking hopper 1, and the second limiting frame 20 is located between the unloading conveying frames 18.

[0070] The size of the first limiting frame 19 is slightly larger than the size of the square top plate 6.

[0071] Several short feeding rollers 21 are rotatably installed on each longitudinal outer wall of the first limiting frame 19, and the ends of the short feeding rollers 21 are rotatably supported on the longitudinal inner wall of the stacking bin 1.

[0072] Several short feeding rollers 21 are also rotatably installed on each longitudinal outer wall of the second limiting frame 20, and the ends of the short feeding rollers 21 are rotatably supported on the longitudinal inner wall of the feeding conveyor frame 18.

[0073] Several feeding conveying rollers 22 are respectively provided on the horizontal sides of the first limiting frame 19, and the two ends of the feeding conveying rollers 22 are respectively rotatably installed on the longitudinal inner wall of the stacking bin 1.

[0074] The second limiting frame 20 also has several feeding conveying rollers 22 on its horizontal sides. The two ends of the feeding conveying rollers 22 are respectively rotatably installed on the longitudinal inner wall of the feeding conveying frame 18.

[0075] A transmission box 23 is fixed on each longitudinal outer wall of the unloading conveyor frame 18. The end of the transmission box 23 extends laterally to the longitudinal outer wall of the stacking bin 1. A sprocket drive mechanism is provided inside the transmission box 23. The sprocket drive mechanism is connected and driven by each unloading conveyor short roller 21 and unloading conveyor long roller 22.

[0076] Each transmission box 23 has a feeding conveyor motor 24 fixed on its lower end face, and the feeding conveyor motor 24 is connected to the sprocket transmission mechanism for transmission.

[0077] An integrated support platform 25 is provided directly below the second limiting frame 20. The integrated support platform 25 is a C-shaped seat that extends vertically and faces downward. The lower end of the integrated support platform 25 is grounded.

[0078] A steering drive motor 26 is fixed in the middle of the lower surface of the integrated support platform 25. The output shaft of the steering drive motor 26 passes upward through the integrated support platform 25 and is fixed with a steering disc 27. A vertical lifting and telescopic cylinder 28 is fixed in the center of the upper surface of the steering disc 27.

[0079] A horizontal circular support plate 29 is fixed to the upper telescopic end of the lifting telescopic cylinder 28. The circular support plate 29 can pass through the second limit frame 20 by lifting.

[0080] The adaptive clamping module includes a hinged base 30, which is located on the longitudinal side of the unloading conveyor 18 and its lower end is welded to the upper surface of the integrated support platform 25.

[0081] A telescopic swing arm 31 is rotatably provided inside the hinged base 30. A swing drive motor 32 is fixed on the transverse outer wall of the hinged base 30. The end of the output shaft of the swing drive motor 32 passes through the side wall of the hinged base 30 and is fixed to the bottom side end face of the telescopic swing arm 31.

[0082] A square side plate 33 is welded to the longitudinal side wall near the upper end of the telescopic arm 31. Two transversely symmetrical electrically controlled telescopic cylinders 34 are fixed on the front side wall of the square side plate 33, and a telescopic control unit 35 electrically connected to the electrically controlled telescopic cylinders 34 is fixed on the back side wall of the square side plate 33.

[0083] The adaptive clamping module also includes a clamping limiting plate 36, which is a U-shaped plate with a longitudinal opening. The telescopic ends of the two electrically controlled telescopic cylinders 34 are fixed to the back of the clamping limiting plate 36.

[0084] The clamping and limiting plate 36 has three vertical strip clamping plates 37 that extend and retract on its longitudinal inner wall and two transverse inner walls. The strip clamping plates 37 can adaptively extend and retract according to the position of the battery cell.

[0085] The laser spot welding module includes a steering base 38, which is located on the opposite side of the hinged base 30 and its lower end is also welded to the upper surface of the integrated support platform 25.

[0086] A multi-axis robotic arm 39 is rotatably mounted on the upper surface of the steering base 38, and a laser welding machine 40 is fixed at the end of the multi-axis robotic arm 39.

[0087] The motion path of the multi-axis robotic arm 39 is offset from the swing path of the telescopic arm 31 to avoid interference.

[0088] A central control panel 41 is fixed on the transverse outer wall of the feeding conveyor frame 12. The central control panel 41 can realize the comprehensive integrated control of various modules.

[0089] The working process of this device is as follows: First, start the feeding conveyor motor 15. The feeding conveyor motor 15 drives the feeding conveyor roller 13 connected to it to rotate, which drives the feeding conveyor belt 14 sleeved on the two feeding conveyor rollers 13 to run synchronously. Several energy storage power cell cells to be processed are placed sequentially on the feeding conveyor belt 14. Under the conveying of the feeding conveyor belt 14, the cell cells are sent into the stacking bin 1 through the feeding connection port 10. The control cylinder 5 extends, driving the square ejector plate 6 to move upward to a position flush with the feeding conveyor belt 14; Control the two side clamping conveyors 16 to extend in opposite directions, use the side clamping conveyor belt 17 to clamp a single battery cell, drive the side clamping conveyor belt 17 to roll and drive the battery cell to move further longitudinally until the battery cell is transferred to the square top plate 6. The square top plate 6 is controlled to descend in stages, and the above-mentioned conveying and feeding process of a single battery cell is repeated to complete the layer-by-layer stacking of multiple battery cells. After the solar cells are fed into the stacking hopper 1, the counting and recognition camera 4 on the lower surface of the horizontal cover plate 2 captures the signal of the solar cells in place and transmits the data to the counting and display control box 3 to record the number of stacked solar cells in real time, so as to control the total number of stacked layers. The positioning control box 9 controls the extension of the positioning telescopic cylinder 8, driving four centrally symmetrical side-push positioning plates 7 to move towards the center of the stacking bin 1, clamping and positioning the stacked battery cells from all sides, ensuring that the battery cells are in the center of the stacking bin 1, ensuring the coaxiality of each layer of battery cells, and facilitating subsequent integrated unloading and conveying. After positioning is completed, the positioning telescopic cylinder 8 drives the side-push positioning plate 7 to reset and release the battery cell; The telescopic cylinder 5 is shortened, driving the square ejector plate 6 to continue to move downward until it passes through the first limit frame 19. At this time, the stacked battery cells are blocked and intercepted by the feeding conveyor short roller 21 and the feeding conveyor long roller 22, thereby transferring the stacked battery cells to the feeding conveyor assembly. Start the feeding conveyor motor 24, which drives each feeding conveyor short roller 21 and feeding conveyor long roller 22 to rotate synchronously through the sprocket transmission mechanism in the transmission box 23, and conveys the stacked battery cells from the stacked hopper 1 to the outside through the feeding connection port 11. When the stacked solar cells are conveyed above the second limit frame 20, the unloading conveyor motor 24 is turned off; The lifting telescopic cylinder 28 is extended, and the circular pallet 29 is moved upward to lift the stacked clamps upward, so that they are separated from the short feeding conveyor roller 21 and the long feeding conveyor roller 22. Start the swing drive motor 32 to drive the telescopic swing arm 31 to rotate 90° around the hinge base 30, so that it swings upward from the horizontal avoidance state to the vertical clamping state. Control the telescopic swing arm 31 to extend and retract, adjust the clamping height, and move the clamping limit plate 36 to the corresponding position on the outside of the stacked battery cells; The electronically controlled telescopic cylinder 34 extends, pushing the clamping and limiting plate 36 closer to the stacked battery cells until the U-shaped inner wall of the clamping and limiting plate 36 is close to the side wall of the stacked battery cells. The three strip clamping plates 37 are controlled to extend respectively, and the stacked battery cells are adaptively clamped and fixed from three directions to prevent displacement during the welding process. The multi-axis robotic arm 39 on the steering base 38 adjusts its posture according to the preset welding path, driving the laser welder 40 at the end to move to the welding point of the stacked battery cells; the laser welder 40 starts and performs fixed-point welding on the splicing of the multi-layer battery cells. After the welding is completed, the multi-axis robotic arm 39 resets, and the strip clamping plate 37 and the electronically controlled telescopic cylinder 34 of the adaptive clamping module reset and release the stacked battery cells in sequence. Subsequently, the steering drive motor 26 drives the steering disk 27 to rotate 90° to switch the welding position of the stacked battery cells, and then uses the laser spot welding module to weld the other side of the stacked battery cells again. After welding is completed, the lifting telescopic cylinder 28 is shortened, so that the circular pallet 29 moves down to below the second limit frame 20. At this time, the stacked battery cells are blocked and intercepted twice by the feeding conveyor short roller 21 and the feeding conveyor long roller 22. The adaptive clamping module is controlled to swing back and reset, and the battery cell conveying avoids obstacles. The unloading conveying motor 24 is restarted, which drives the short unloading conveying rollers 21 and the long unloading conveying rollers 22 to rotate synchronously, and the welded multi-layer battery cells are conveyed and unloaded.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A laser welding device for stacking and assembling energy storage power cell cells, characterized in that: This includes a cell delivery module, a stacking and positioning module, an adaptive clamping module, and a laser spot welding module; The stacking positioning module includes a stacking bin, which is a square box with an open top and a closed, grounded bottom. The stacking hopper is equipped with a cell ejection mechanism, which includes a vertical ejection telescopic cylinder. The lower end of the ejection telescopic cylinder is fixed at the center of the inner bottom surface of the stacking hopper, and a horizontal square ejection plate is fixed at the upper telescopic end of the ejection telescopic cylinder. The stacked silo has four centrally symmetrical side-push positioning plates that extend and retract on the inner side wall of the middle section. A square feeding port is provided on one longitudinal side wall of the stacked silo, and a square discharging port is provided on one transverse side wall of the stacked silo. The battery cell conveying module includes a feeding conveying component facing the feeding port and a discharging conveying component facing the discharging port; The adaptive clamping module includes a hinged base, a telescopic swing arm rotatably mounted inside the hinged base, a clamping limiting plate telescopically mounted on the upper half of the telescopic swing arm, the clamping limiting plate being a U-shaped plate with a longitudinal opening, and three vertical strip clamping plates telescopically mounted on the longitudinal inner wall and two transverse inner walls of the clamping limiting plate, respectively. The laser spot welding module includes a steering base, on the upper surface of which a multi-axis robotic arm is rotatably mounted, and a laser welding machine is fixed at the end of the multi-axis robotic arm.

2. The laser welding equipment for stacking and assembling energy storage power cell cells according to claim 1, characterized in that: The feeding connection port is located above the four side-push positioning plates; The feeding and conveying assembly includes a feeding and conveying frame, which is an inverted L-shaped frame. The end of the vertical part of the feeding and conveying frame is grounded, and the end of the horizontal part of the feeding and conveying frame is positioned opposite the feeding and connecting port and fixed to the longitudinal outer wall of the stacking silo. The feeding and conveying assembly also includes two feeding and conveying rollers, one of which is rotatably mounted between the transverse inner walls of the horizontal portion of the feeding and conveying frame, and the other feeding and conveying roller passes through the feeding connection port and is rotatably mounted on the transverse inner wall of the stacking bin; A feeding conveyor belt is sleeved between the two feeding conveyor rollers, and the end of the feeding conveyor belt extending into the interior of the stacking bin is set close to the side edge of the square top plate; A feeding conveying motor is fixed on the transverse outer wall of the feeding conveying frame, and the end of the output shaft of the feeding conveying motor is connected to the corresponding feeding conveying roller for transmission. The feeding and conveying assembly also includes two transversely symmetrical side clamp conveyors, which are telescopically installed on the transverse inner wall of the stacking bin; Each of the side clamp conveyor frames is equipped with a side clamp conveyor belt that rolls within it, and the two side clamp conveyor belts are located on one side above the feeding conveyor belt.

3. The laser welding equipment for stacking and assembling energy storage power cell cells according to claim 1, characterized in that: The material discharge port is located below the four side-push positioning plates; The material feeding and conveying assembly includes a material feeding and conveying frame, which is an L-shaped frame that extends laterally and is laid flat. The vertical part of the unloading conveyor is grounded at its end, and the horizontal part of the unloading conveyor is positioned opposite the unloading port and fixed to the transverse side wall of the stacking hopper.

4. The laser welding equipment for stacking and assembling energy storage power cell cells according to claim 3, characterized in that: The material feeding and conveying assembly further includes a first limiting frame and a second limiting frame. Both the first limiting frame and the second limiting frame are horizontally arranged square frames. The first limiting frame is located inside the stacking hopper, and the second limiting frame is located between the material feeding and conveying frames. The size of the first limiting frame is slightly larger than the size of the square top plate; A plurality of short feeding conveyor rollers are rotatably mounted on each longitudinal outer wall of the first limiting frame, and the ends of the short feeding conveyor rollers are rotatably supported on the longitudinal inner wall of the stacking bin. Several short feeding conveyor rollers are also rotatably installed on each longitudinal outer wall of the second limiting frame, and the ends of the short feeding conveyor rollers are rotatably supported on the longitudinal inner wall of the feeding conveyor frame. The first limiting frame has several feeding conveying rollers on its lateral sides, and the two ends of the feeding conveying rollers are rotatably mounted on the longitudinal inner wall of the stacking bin. The second limiting frame is also provided with several feeding conveying rollers on both sides of the horizontal side, and the two ends of the feeding conveying rollers are respectively rotatably installed on the longitudinal inner wall of the feeding conveying frame.

5. The laser welding equipment for stacking and assembling energy storage power cell cells according to claim 4, characterized in that: A transmission box is fixed on each longitudinal outer wall of the feeding conveyor frame. The end of the transmission box extends laterally to the longitudinal outer wall of the stacking hopper. A sprocket drive mechanism is provided inside the transmission box. The sprocket drive mechanism is connected to and drives each feeding conveyor short roller and feeding conveyor long roller. Each of the transmission boxes is fixed with a feeding conveyor motor on its lower end face, and the feeding conveyor motor is connected to the sprocket transmission mechanism for transmission.

6. The laser welding equipment for stacking and assembling energy storage power cell cells according to claim 4, characterized in that: An integrated support platform is provided directly below the second limiting frame. The integrated support platform is a C-shaped seat that extends longitudinally and has an opening facing downwards. The lower end of the integrated support platform is grounded. A steering drive motor is fixed in the middle of the lower surface of the integrated support platform. The output shaft of the steering drive motor passes upward through the integrated support platform and is fixed with a steering disc. A vertical lifting and telescopic cylinder is fixed at the center of the upper surface of the steering disc. The upper telescopic end of the lifting cylinder is fixed with a horizontal circular support plate, which can pass through the second limiting frame by lifting.

7. The laser welding equipment for stacking and assembling energy storage power cell cells according to claim 6, characterized in that: The hinged base is located on one longitudinal side of the unloading conveyor and its lower end is welded to the upper surface of the integrated support platform. A swing drive motor is fixed on the transverse outer wall of the hinge base, and the end of the output shaft of the swing drive motor passes through the side wall of the hinge base and is fixed to the bottom side end face of the telescopic swing arm. A square side plate is welded to the longitudinal side wall near the upper end of the telescopic swing arm. Two transversely symmetrical electrically controlled telescopic cylinders are fixed on the front side wall of the square side plate. A telescopic control unit electrically connected to the electrically controlled telescopic cylinders is fixed on the back side wall of the square side plate. The telescopic ends of the two electrically controlled telescopic cylinders are fixed to the back of the clamping limit plate.

8. The laser welding equipment for stacking and assembling energy storage power cell cells according to claim 7, characterized in that: The steering base is located on the opposite side of the hinged base, and its lower end is also welded to the upper surface of the integrated support platform.

9. The laser welding equipment for stacking and assembling energy storage power cell cells according to claim 1, characterized in that: The upper end of the stacked silo is equipped with a detachable horizontal cover plate. A counting and display control box is fixed on the upper surface of the horizontal cover plate, and a counting and recognition camera is fixed on the lower surface of the horizontal cover plate. The counting and recognition camera is electrically connected to the counting and display control box.

10. The laser welding equipment for stacking and assembling energy storage power cell cells according to claim 1, characterized in that: A positioning telescopic cylinder is provided between the back of the side-push positioning plate and the inner peripheral wall of the stacking hopper. The fixed end of the positioning telescopic cylinder is fixed to the inner peripheral wall of the stacking hopper, and the telescopic end of the positioning telescopic cylinder is fixed to the back of the side-push positioning plate. A rectangular positioning control box is fixed on the outer perimeter wall of the stacked silo, and the positioning control box is electrically connected to each positioning telescopic cylinder.

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