A solder strip reverse folding photovoltaic module laminating production line

Abstract

The application discloses a kind of welding strip reverse folding photovoltaic module laminating production line, it is related to photovoltaic module production technical field, production line has first conveying direction and second conveying direction, production line is provided with feeding station, string placement station, confluence welding station, laying station and laminating detection and discharging station along first conveying direction, production line is provided with turnover bending station along second conveying direction, turnover bending station is sequentially provided with conveying assembly, turnover assembly and bending assembly along second conveying direction, conveying assembly, turnover assembly and bending assembly can process N string battery string with same number synchronously, N is integer greater than or equal to 2;Turnover assembly has two oppositely arranged and can be independently controlled adsorption surface, can eliminate the waiting time generated between adjacent two times of turnover action due to adsorption surface idle reset;To compress the average processing time of single string battery string, realize the technical effect that the production efficiency of welding strip reverse folding photovoltaic module laminating production line does not decrease due to new process.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module manufacturing technology, specifically a production line for photovoltaic module stacking with reverse-folded solder strips. Background Technology

[0002] Reverse-folding photovoltaic (PV) modules (also known as full-screen PV modules) are a new type of PV module. In conventional PV modules, the connection between cell strings requires reserved space for solder strips at the edge of the PV module, which cannot accommodate the cells, resulting in wasted layout area. Reverse-folding PV modules eliminate the space occupied by solder strips on the front by folding the solder strips at the ends of the cell strings to the back of the cell string and completing the connection on the back. This allows more cells to be arranged in the same area of ​​the module, thus effectively improving the power generation efficiency per unit area. Currently, reverse-folding PV modules have entered the stage of mass production. The stacking process is a core preparatory step before photovoltaic module encapsulation. Its main task is to lay and stack materials such as front panel / glass, encapsulant film (EVA / POE, etc.), cell strings, and backsheet in a predetermined stacking order to form the stacked component to be laminated. In the stacking process of conventional photovoltaic modules, the cell strings are directly supplied to the stacking production line for string arrangement after the string welding process, followed by bus welding, encapsulation structure stacking and other operations. The cycle time of the stacking production line is usually determined by the main processes such as string arrangement and bus welding. However, for photovoltaic modules with reversed solder strips, since the solder strips at the ends of the cell strings need to be folded back to the back of the cell strings for bus welding, two additional processes of flipping and bending must be added to the stacking process. Currently, in the production line of the weld strip anti-fold layer, the flipping and bending of the battery string are usually carried out sequentially. After the flipping component completes the flipping of one battery string, it has to wait for the next battery string to arrive before it can continue to work. Similarly, the bending component bends one string at a time. There is a lack of coordination between the processes. This serial operation mode results in a long cycle time for the flipping and bending processes, which has become another bottleneck restricting the entire lamination production line and seriously affecting the overall production efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a production line for stacking photovoltaic modules with reverse-folded welding strips, so as to solve the problem that the production efficiency of stacking photovoltaic modules is low due to the addition of two processes of flipping and bending in the existing production line.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A photovoltaic module stacking production line with reverse folding of welding strips has a preset first conveying direction and a second conveying direction, the second conveying direction being perpendicular to the first conveying direction. It includes a controller, a feeding station, a string swinging station, a busbar welding station, a laying station and a stacking detection and unloading station arranged sequentially along the first conveying direction, and a turning and bending station arranged along the second conveying direction, the turning and bending station being connected to the string swinging station. The turning and bending station is provided with a conveying component, a turning component, and a bending component sequentially along the second conveying direction. The conveying component, turning component, and bending component are all connected to the controller signal. The conveying component is located below the turning component and is used to supply battery string groups to the turning component. The battery string group consists of N parallel battery strings, where N is an integer greater than or equal to 2. The turning component is used to turn the battery string group over as a whole, and the bending component is used to bend the end welding strips of each battery string in the turned battery string group. The flipping assembly includes a flipping plate with two adsorption surfaces arranged opposite each other. The flipping plate is provided with a moving group, which includes several moving slots and a pushing plate. The several moving slots are arranged parallel to the surfaces of the two adsorption surfaces along the second conveying direction, and the pushing plate is arranged on the adsorption surface.

[0005] Through the above scheme, the conveying component, flipping component, robotic arm, and bending component can simultaneously process N battery strings in the same quantity, significantly reducing the average processing time for a single battery string. The setting of the moving trough and the push plate allows the push plate to move along the surface of the adsorption surface, pushing the entire battery string away from the adsorption surface as a whole, which solves the problem of rejecting defective products that may occur when the flipping and bending station processes battery strings. The synergy of the above methods enables the flipping and bending station to realize the group conveying, flipping, and bending of battery strings, thereby reducing the cycle time loss caused by the addition of flipping and bending processes to the multilayer production line, and achieving the technical effect that the production efficiency of the multilayer photovoltaic module production line with welded strips does not decrease due to the addition of processes.

[0006] Preferably, the conveying assembly includes a horizontal drive structure, a lifting drive structure, and a conveying platform; a plurality of battery strings are arranged parallel to each other along the second conveying direction on the conveying platform; the horizontal drive structure is located below the conveying platform along the second conveying direction; the lifting drive structure is installed on the output end of the horizontal drive structure; and the output end of the lifting drive structure is fixedly connected to the conveying platform.

[0007] Through the above scheme, the horizontal drive structure of the conveying platform drives the conveying platform to advance along the second conveying direction in a stepping manner, and accurately transfers several battery strings arranged parallel along the second conveying direction on the conveying platform to the underside of the flipping component in batches; then the lifting drive structure raises the battery strings so that they are in close contact with the adsorption surface of the flipping component, thereby realizing the grouped supply of several battery strings in multiple batches.

[0008] Preferably, a detection head connected to the controller signal is provided above the flipping plate, and the detection head is used to perform visual inspection on the flipped battery pack; a robot arm and a transition platform connected to the controller signal are also provided between the flipping component and the bending component, the robot arm is located on one side of the transition platform, and the robot arm is used to transfer the flipped battery pack to the bending component, and the upper surface of the transition platform is on the same plane as the upper surface of the flipping plate.

[0009] With the above scheme, the detection head, robotic arm, and transition platform are all connected to the controller signal. The detection head performs visual inspection on the flipped battery strings to identify defective products in the flipped battery packs. The robotic arm is used to transfer the good battery packs to the bending assembly for bending. The transition platform can temporarily store the rejected defective battery packs.

[0010] Preferably, the moving groove is provided with a drive shaft and a power unit, the drive shaft is connected to the power unit, the drive shaft is rotatably connected to the moving groove, a slider is provided on the drive shaft, the slider is rotatably connected to the drive shaft, and several sliders are connected to a push plate.

[0011] Through the above scheme, the controller starts the power unit, which drives the transmission shaft to rotate. During the rotation of the transmission shaft, the transmission shaft drives the slider to move, causing the slider to move radially along the moving groove. During the movement of the slider, the slider drives the push plate to move, causing the push plate to move along the surface of the adsorption surface. In turn, the push plate pushes the battery string on the surface of the adsorption surface during the movement, so that the battery string is transferred from the flipping plate to the surface of the transition platform, thereby realizing the transfer of the battery string. After the push plate has completely pushed the battery string to the transition platform, the flipping plate does not need to wait for the moving group to be fully reset before starting the adsorption and flipping operation of the next battery string. The flipping operation and the moving group reset action overlap in time, eliminating the additional cycle time loss caused by the moving group reset.

[0012] Preferably, the movable groove is provided with two sets of sealing folding strips, and the two sets of sealing folding strips are respectively arranged on both sides of the slider; the side wall of the sealing folding strip is slidably and sealingly connected to the side wall of the movable groove, one end of the sealing folding strip is connected to the slider, and the other end of the sealing folding strip is connected to the inner wall of the movable groove.

[0013] With the above scheme, when the slider moves under the action of the drive shaft, several sliders move synchronously. When the slider moves closer to the transition platform, it pushes and squeezes the sealing folding strip between the slider and the transition platform. Meanwhile, the slider pulls the sealing folding strip away from the transition platform. This ensures that when the slider drives the push plate to move the battery string, the moving groove is always in a sealed state. This ensures that the vacuum suction holes on the adsorption surface will not leak air due to the opening of the moving groove, thus ensuring the stability of the adsorption and pushing action.

[0014] Preferably, the upper surface of the transition platform is provided with a plurality of rotating grooves, and a placement plate is provided in the rotating groove. The placement plate is rotatably connected to the rotating groove via a rotating shaft. A micro motor is provided in the rotating groove, and the drive shaft of the micro motor is connected to the rotating shaft of the placement plate. The interior of the transition platform is provided with a ramp groove, and the rotating groove is connected to the ramp groove. A waste box is provided on the side of the ramp groove away from the flipping plate. The waste box is slidably connected to the lower surface of the transition platform and is connected to the ramp groove.

[0015] Through the above scheme, defective battery strings are pushed to the surface of several placement plates. The controller can control the corresponding placement plate to rotate according to the position of the defective battery string detected by the detection head, so that the defective battery string is transported through the rotating groove to the inclined groove, and then transported to the waste box for storage, realizing the fixed-point rejection of defective battery strings and ensuring that adjacent good battery strings on the transition platform are not disturbed.

[0016] Preferably, a placement platform is provided on one side of the robotic arm, and several strings of good quality batteries are placed on the placement platform.

[0017] With the above solution, when the battery string group on the transition platform is missing, the robot can take the corresponding number of battery strings from the placement table and place them at the missing battery string group on the transition platform. After the battery string group on the surface of the transition platform is replenished, the robot will then transport the battery string group on the surface of the transition platform to the bending component.

[0018] Preferably, the flip plate is provided with a first air passage and a second air passage that are independent of each other. The first air passage and the second air passage are respectively connected to two adsorption surfaces. Both the first air passage and the second air passage are connected to an external air pump.

[0019] Through the above scheme, the two adsorption surfaces are controlled independently by setting up the first and second air passages. When the upper adsorption surface releases the currently flipped battery string, the lower adsorption surface can simultaneously adsorb the next set of battery strings to be flipped, thereby eliminating the waiting time caused by the empty reset of the adsorption surface between two adjacent flipping actions and realizing continuous operation of the flipping process.

[0020] Preferably, the battery stringing station includes a battery stringing robot connected to the controller signal. The battery stringing robot is used to transfer the battery string group that has completed the welding strip bending to the battery stringing station for arrangement. The battery stringing robot includes a body structure and an adsorption execution structure. The adsorption execution structure is provided with several sets of adsorption bars arranged in parallel. Each set of adsorption bars adsorbs or releases a single battery string individually.

[0021] Through the above scheme, the string-stacking robot can implement differentiated layout control according to the different circuit connection forms of photovoltaic modules: if the photovoltaic module design circuit is all battery strings connected in parallel, the string-stacking robot synchronously controls all N sets of adsorption bars to arrange the N battery strings that have been bent into groups at one time; if the photovoltaic module circuit is all battery strings connected in series, the controller first controls the odd-numbered adsorption bars of the string-stacking robot to release the battery strings for arrangement, and then controls the remaining even-numbered adsorption bars to rotate horizontally by 180° and release the remaining battery strings for arrangement, thereby meeting the layout requirements of photovoltaic modules with different circuit forms under the condition of grouped battery string processing.

[0022] Preferably, the stacking inspection and unloading station is equipped with a tape pre-fixing mechanism, an EL detection mechanism, and a diversion unloading mechanism connected to the controller signal. The tape pre-fixing mechanism is used to attach tape to the side end of the stacked part, the EL detection mechanism is used to perform EL detection on the stacked part, and the diversion unloading mechanism is used to perform diversion buffering operation according to the EL detection result.

[0023] The above solution integrates a tape pre-fixing mechanism, an EL (Elastic Elasticity) inspection mechanism, and a diversion unloading mechanism at the stacking inspection and unloading station. The tape pre-fixing mechanism physically constrains the stacked parts before they are transferred, preventing interlayer slippage and ensuring the stability and accuracy of subsequent EL inspections. The diversion unloading mechanism automatically performs diversion buffering based on the EL inspection results, organically connecting the inspection and unloading processes. This avoids secondary damage caused by accidental contact or handling during traditional manual unloading and sorting, while eliminating manual sorting and further improving the automation level and product yield of the entire line.

[0024] Compared with the prior art, the beneficial effects of the present invention are: The conveying, flipping, robotic arm, and bending components all work collaboratively using battery string groups as the operational unit. Each battery string group consists of N battery strings, where N is an integer greater than or equal to 2, significantly reducing the average processing time for a single battery string. The flipping component has two opposing and independently controllable adsorption surfaces. When the upper adsorption surface releases the currently flipped battery string group, the lower adsorption surface can simultaneously adsorb the next set of battery string groups to be flipped, thus eliminating the waiting time caused by the adsorption surface resetting under no-load conditions between adjacent flipping actions, thereby achieving continuous operation of the flipping process. The moving groove and push plate on the flipping plate allow the push plate to move along the surface of the adsorption surface, pushing the battery string group containing defective products away from the adsorption surface and transferring it to the transition platform for defective product rejection and good product replenishment. The synergy of these methods enables the flipping and bending station to transport, flip, and bend battery strings in groups, thereby reducing the cycle time loss caused by the addition of flipping and bending processes to the multilayer production line, achieving the technical effect that the production efficiency of the photovoltaic module multilayer production line with welded strips does not decrease due to the addition of processes. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the workstation layout of the present invention; Figure 2 A structural diagram of the turning and bending station and the stringing station; Figure 3 This is a partial schematic diagram of the turning and bending workstation; Figure 4 This is a structural diagram of the conveying component and the flipping component; Figure 5 Side view of the conveyor and flipper components; Figure 6 This is a structural diagram of the flip-up component and the transition platform; Figure 7 This is a structural diagram of the moving group; Figure 8 This is a schematic diagram of the transition platform. Figure 9 This is a schematic diagram of the internal structure of the flip component and transition platform.

[0026] In the diagram: 1. Turning and bending station; 11. Robotic arm; 12. Transition platform; 13. Rotating chute; 14. Placement plate; 15. Inclined chute; 16. Scrap box; 17. Placement table; 2. Conveying assembly; 21. Horizontal drive structure; 22. Lifting drive structure; 23. Conveying platform; 3. Flipping assembly; 31. Rotating shaft; 32. Flipping plate; 33. Adsorption surface; 331. Vacuum suction hole; 34. Moving assembly; 341. Moving groove; 342. Push plate; 343. Drive shaft; 344. Slider; 345. Sealing folding strip; 4. Bending assembly; 5. Inspection head; 6. Loading station; 7. Stringing station; 8. Busbar welding station; 9. Laying station; 10. Stacking inspection and unloading station. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] See Figure 1 and Figure 2A photovoltaic module stacking production line with reverse folding of welding strips has a preset first conveying direction and a second conveying direction, the second conveying direction being perpendicular to the first conveying direction. It includes a controller, and is arranged in sequence along the first conveying direction as a feeding station 6, a string swinging station 7, a busbar welding station 8, a laying station 9 and a stacking detection and unloading station 10, as well as a turning and folding station 1 arranged along the second conveying direction. The flipping and bending station 1 is sequentially equipped with a conveying component 2, a flipping component 3, and a bending component 4 along the second conveying direction, and the conveying component 2, the flipping component 3, and the bending component 4 are all connected to the controller signal; the bending component 4 of the flipping and bending station 1 is connected to the stringing station 7, the conveying component 2 is located below the flipping component 3, the conveying component 2 is used to supply battery string groups to the flipping component 3, the battery string group is composed of N parallel battery strings, where N is an integer greater than or equal to 2; the flipping component 3 is used to flip the battery string group as a whole, and the bending component 4 is used to bend the end welding strips of each battery string in the flipped battery string group.

[0029] The loading station 6 is used for laying the front plate and the front adhesive film; the flipping and bending station 1 is used to receive the battery strings output from the upstream (such as the string welding mechanism) and sequentially flip the battery strings and bend the end solder strips; the string arranging station 7 is used for arranging the battery string groups after flipping and bending; the bus welding station 8 is used for bus welding the reverse-folded solder strips on the back of the battery strings; the laying station 9 is used for laying the back adhesive film and the back plate to form the laminated parts; the laminated inspection and unloading station 10 is used for pre-fixing, EL inspection and automated shunt unloading buffer for the laminated parts.

[0030] Specifically, the specific structures of the material loading station, the busbar welding station, and the laying station are not the focus of this invention. Those skilled in the art can select conventional automated equipment to implement them according to the production line requirements, and their specific mechanical structures will not be described in detail here.

[0031] The stack inspection and unloading station 10 is equipped with a tape pre-fixing mechanism, an EL detection mechanism, and a diversion unloading mechanism that are connected to the controller signal. The tape pre-fixing mechanism is used to attach tape to the side end of the stacked part. The EL detection mechanism is used to perform EL detection on the stacked part. The diversion unloading mechanism is connected to the controller signal and is used to perform automatic diversion buffering operation according to the detection result of the EL detection mechanism.

[0032] See Figure 4The flipping assembly 3 includes a base, a left support, a right support, a rotating shaft 31, a flipping plate 32, and a flipping motor. The left and right support are installed on the base at intervals. The two ends of the flipping plate 32 are rotatably connected to the left and right support respectively. The flipping motor is installed on the outside of the left support. The output shaft of the flipping motor drives the flipping plate 32 to rotate around a horizontal central axis through the rotating shaft 31. The flipping plate 32 has two adsorption surfaces 33 arranged vertically opposite to each other. Each adsorption surface 33 is provided with a plurality of vacuum suction holes 331. The flipping plate 32 is provided with a first air passage and a second air passage that are independent of each other. The first air passage and the second air passage are respectively connected to the vacuum suction holes 331 of the two adsorption surfaces 33. Both the first air passage and the second air passage are connected to an external air pump.

[0033] The flipping assembly 3 independently controls the first or second air passage, enabling the two adsorption surfaces 33 to independently adsorb or release battery strings. This allows the upper adsorption surface 33 to release the currently flipped battery string while the lower adsorption surface 33 simultaneously adsorbs the next set of battery strings to be flipped during the flipping operation of the flipping plate 32. This eliminates the waiting time caused by the adsorption surface 33 resetting under no-load conditions between adjacent flipping actions, achieving continuous operation of the flipping process and reducing the overall line cycle time loss caused by the addition of the flipping process.

[0034] See Figure 4 and Figure 5 The conveying assembly 2 includes a horizontal drive structure 21, a lifting drive structure 22, and a conveying platform 23. The conveying platform 23 is used to receive a plurality of battery strings output by the stringing mechanism, and the plurality of battery strings are arranged parallel to each other on the conveying platform 23 along a second conveying direction. The horizontal drive structure 21 is disposed below the conveying platform 23 along the second conveying direction, and the horizontal drive structure 21 is used to drive the conveying platform 23 to perform horizontal stepping motion along the second conveying direction. The lifting drive structure 22 is installed on the output end of the horizontal drive structure 21, and the output end of the lifting drive structure 22 is fixedly connected to the conveying platform 23. The lifting drive structure 22 is used to drive the conveying platform 23 to perform vertical lifting motion.

[0035] The horizontal drive structure 21 can be a servo module, and the lifting drive structure 22 can be a cylinder, servo module, etc. Those skilled in the art can also select other conventional drive devices that can achieve the corresponding linear drive function as needed. Under the control of the controller, the horizontal drive structure 21 drives the conveying platform 23 to advance along the second conveying direction in a stepping manner, and accurately transfers several battery strings arranged in parallel along the second conveying direction on the conveying platform 23 to the underside of the flipping component 3 in batches of N battery strings. Then the lifting drive structure 22 lifts the battery strings so that they are in close contact with the adsorption surface 33 of the flipping component 3, thereby realizing the supply of multiple batches of N battery strings (battery string groups).

[0036] See Figure 2 Above the flipping plate 32 is a detection head 5 connected to the controller signal. The detection head 5 is used to perform visual inspection on the flipped battery pack. Between the flipping component 3 and the bending component 4, there is also a robot arm 11 connected to the controller signal. The robot arm 11 is used to transfer the flipped battery pack to the bending component 4.

[0037] The robotic arm 11 includes a main body structure and an adsorption execution structure. The main body structure of the robotic arm 11 can adopt conventional automated transfer equipment in the field, such as a multi-joint industrial robotic arm or a gantry robotic arm. The adsorption execution structure of the robotic arm 11 is provided with several sets of adsorption strips arranged in parallel. Each set of adsorption strips is provided with several suction cups. Each set of adsorption strips is provided with independent air passages. Each air passage is connected to the suction cups of each set of adsorption strips. The suction cups are connected to an external air pump, that is, each set of adsorption strips can adsorb or release a single battery string individually. See Figure 2 The string arrangement station 7 includes a string arrangement robot connected to the controller. This robot is used to transfer battery string groups that have undergone ribbon bending to the string arrangement station 7 for layout. The structure of the string arrangement robot is consistent with that of the aforementioned robot 11, including a main body structure and an adsorption execution structure. The adsorption execution structure of the string arrangement robot also has several sets of adsorption bars arranged in parallel, each set adsorbing or releasing a single battery string individually. When the string arrangement robot performs the layout operation, if the photovoltaic module design circuit has all battery strings connected in parallel, the string arrangement robot synchronously controls all N sets of adsorption bars to arrange all N battery strings in the bent battery string group at once. If the photovoltaic module circuit has all battery strings connected in series, the controller first controls the odd-numbered adsorption bars of the string arrangement robot to release the battery strings for layout, and then controls the remaining even-numbered adsorption bars to rotate horizontally by 180° before releasing the remaining battery strings for layout, thereby meeting the layout requirements of photovoltaic modules with different circuit configurations under the condition of processing battery strings in groups.

[0038] See Figure 6 and Figure 7In one specific embodiment of the present invention, the flipping plate 32 is provided with a moving group 34, which includes a plurality of moving slots 341 and a pusher plate 342. The plurality of moving slots 341 are arranged parallel to each other along the second conveying direction on the surfaces of two adsorption surfaces 33. A transmission shaft 343 and a power unit are provided in the moving slots 341. The transmission shaft 343 is connected to the power unit (the power unit is a micro motor). The transmission shaft 343 is rotatably connected to the moving slots 341. A slider 344 is provided on the transmission shaft 343. The slider 344 is rotatably connected to the transmission shaft 343. The plurality of sliders 344 are connected to the pusher plate 342.

[0039] The controller starts the power unit, which drives the transmission shaft 343 to rotate. During the rotation, the transmission shaft 343 moves the slider 344, causing the slider 344 to move radially along the moving groove 341. During the movement, the slider 344 moves the push plate 342, causing the push plate 342 to move along the surface of the adsorption surface 33. In turn, the push plate 342 pushes the battery string on the surface of the adsorption surface 33, so that the battery string is transferred from the flipping plate 32 to the surface of the transition platform 12. After the push plate 342 has completely pushed the battery string to the transition platform 12, the flipping plate 32 can start the adsorption and flipping operation of the next battery string without waiting for the moving group 34 to be fully reset. The flipping operation and the reset action of the moving group 34 overlap in time, eliminating the additional cycle time loss caused by the reset of the moving group 34.

[0040] In one specific embodiment of the present invention, two sets of sealing folding strips 345 are provided in the moving groove 341, and the two sets of sealing folding strips 345 are respectively provided on both sides of the slider 344; the side wall of the sealing folding strip 345 is slidably and sealingly connected to the side wall of the moving groove 341, one end of the sealing folding strip 345 is connected to the slider 344, and the other end of the sealing folding strip 345 is connected to the inner wall of the moving groove 341.

[0041] When slider 344 moves under the action of drive shaft 343, several sliders 344 move synchronously. When slider 344 moves closer to transition platform 12, slider 344 pushes and squeezes the sealing folded strip 345 between slider 344 and transition platform 12. Meanwhile, slider 344 pulls the sealing folded strip 345 away from transition platform 12. This ensures that when slider 344 drives push plate 342 to move battery string, moving groove 341 is always sealed. This ensures that vacuum suction hole 331 on adsorption surface 33 will not leak air due to moving groove 341 being open, thus ensuring the stability of adsorption and pushing action.

[0042] See Figure 3 , Figure 8 and Figure 9A transition platform 12 connected to the controller signal is provided between the flipping component 3 and the bending component 4. The robot arm 11 is located on one side of the transition platform 12. The upper surface of the transition platform 12 is on the same plane as the upper surface of the flipping plate 32. The upper surface of the transition platform 12 is provided with a plurality of rotating grooves 13. A placement plate 14 is provided in the rotating groove 13. The placement plate 14 is rotatably connected to the rotating groove 13 through a rotating shaft. A micro motor is provided in the rotating groove 13. The drive shaft of the micro motor is connected to the rotating shaft of the placement plate 14. A ramp groove 15 is provided inside the transition platform 12. The rotating groove 13 is connected to the ramp groove 15. A waste box 16 is provided on the side of the ramp groove 15 away from the flipping plate 32. The waste box 16 is slidably connected to the lower surface of the transition platform 12. The waste box 16 is connected to the ramp groove 15.

[0043] The transition platform 12 is linked with the detection head 5 and, together with the independently controlled placement plate 14, can achieve the directional removal of defective battery strings in the battery string group, while the adjacent good battery strings in the battery string group are not disturbed: when the detection head 5 identifies a defective product, the controller only drives the placement plate 14 directly below the defective product to flip downward, so that the defective product falls into the ramp trough 15 and enters the waste box 16.

[0044] For further details, please refer to [link / reference]. Figure 3 The robotic arm 11 has a placement platform 17 on one side, and several strings of good quality batteries are placed on the placement platform 17.

[0045] When a battery string group is missing on the transition platform 12, the robot arm 11 can take away the corresponding number of battery strings from the placement table 17 and place them at the missing battery string location on the transition platform 12. After the battery string group on the surface of the transition platform 12 is replenished, the robot arm 11 will then transport the battery string group on the surface of the transition platform 12 to the bending assembly 4.

[0046] By configuring the inspection head 5, transition platform 12, and placement table 17, when the inspection head 5 detects a defective battery string in the current battery string group, the push plate 342 can push the entire battery string group on the flip plate 32 to the transition platform 12 for temporary storage. Subsequently, the controller controls the corresponding placement plate 14 to flip based on the detection result of the inspection head 5, allowing the defective battery string to slide down through the rotating groove 13 to the inclined groove 15 and finally enter the waste box 16 for storage. Then, the robot arm 11 takes away the corresponding number of good battery strings from the placement table 17 to replenish the battery string group on the transition platform 12, and then transports the battery string group to the bending component 4. This process avoids the cumbersome process of the robot arm 11 picking out defective battery strings one by one on the surface of the flip plate 32, replenishing them one by one, and finally transporting them as a whole, thereby further reducing the transportation process and further improving the overall efficiency of flipping, transporting, and inspecting in the photovoltaic module stacking production line.

[0047] Working principle of the invention: Initially, the conveying platform 23 is located away from the bending assembly 4. Several battery strings are then arranged in multiple parallel rows along the second conveying direction on the conveying platform 23. Subsequently, driven by the horizontal drive structure 21, the conveying platform 23 moves closer to the flipping assembly 3 along the second conveying direction, bringing it below the flipping assembly 3. When the conveying platform 23 is directly below the flipping assembly 3, the lifting drive structure activates, lifting the conveying platform 23 upwards, causing the upper surfaces of the N battery strings to come into close contact with the lower adsorption surface 33, thus achieving adsorption... The adsorption surface 33 can adsorb the battery string through negative pressure; then the controller controls the flip motor to start, the flip motor drives the rotating shaft 31 to rotate, so that the rotating shaft 31 drives the flip plate 32 to rotate, and then the flip plate 32 drives the adsorption surface 33 to rotate, so that the adsorbed and fixed battery string rotates 180°, and thus the battery string is located below the detection head 5. Then the detection head 5 detects the battery string; after the detection is completed, the detection head 5 outputs the detection result signal to the controller, and performs the following three different actions according to the detection result: When all the battery strings adsorbed by the upper adsorption surface 33 of the flipping component 3 are good products, the robot arm 11 directly picks up all the battery strings of the battery string group located on the upper adsorption surface 33 and transports them to the bending component 4.

[0048] When there are some defective battery strings adsorbed by the adsorption surface 33 above the flipping component 3, the moving group 34 is activated, so that all the battery strings in the battery string group can be detached from the adsorption surface 33 and neatly pushed onto the transition platform 12. Then, according to the position of the defective battery strings detected by the detection head 5, the controller controls the corresponding placement plate 14 to rotate, so that the defective battery strings of the battery string group are transported along the inclined groove 15 to the waste box 16 for storage. Then, the robot arm 11 takes away the corresponding number of good battery strings from the placement table 17 and places them on the surface of the transition platform 12 where the battery strings are missing, to complete the battery string group. The robot arm 11 then transports the battery string group that has been completed on the surface of the transition platform 12 to the bending component 4.

[0049] When all the battery strings adsorbed by the adsorption surface 33 of the flipping component 3 are defective, the moving group 34 is activated, so that all the battery strings of the battery string group can be detached from the adsorption surface 33 and neatly pushed onto the transition platform 12; then the controller controls the corresponding placement plate 14 to rotate, so that all the defective battery strings are transported along the ramp 15 to the waste box 16 for storage; then the robot arm 11 waits for the next battery string group of the flipping component 3 to flip to the top before it performs its operation.

[0050] After receiving the battery string group conveyed by the robot arm 11, the bending component 4 can simultaneously complete the bending of the end welding strips of N battery strings in one bending action; after the bending is completed, the swing robot arm will transfer the bent battery string group to the swing station for layout.

[0051] In this way, the conveying platform can supply multiple batches of N-string battery cells in groups through horizontal stepping and lifting movements; both adsorption surfaces of the flipping assembly can independently and controllably adsorb or release N-string battery cells; based on the visual inspection results of the detection head, the robot selectively receives the group of battery cells from the flipping assembly or the transition platform and transfers it to the bending assembly. The bending assembly performs strip bending on the group of battery cells, and then the string-arranging robot receives the group of battery cells from the bending assembly and moves it to the string-arranging station for layout. This allows the flipping, bending, and string-arranging processes to be processed efficiently in groups, thereby reducing the cycle time loss caused by the addition of flipping and bending processes to the laminated production line, and ensuring that the flipping, bending, and string-arranging processes no longer become bottlenecks restricting the overall production efficiency.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A production line for tandem photovoltaic modules with reverse-folded welding strips, characterized in that: It has a preset first conveying direction and a second conveying direction, the second conveying direction being perpendicular to the first conveying direction, including a controller, a loading station (6), a stringing station (7), a confluence welding station (8), a laying station (9), and a stacking detection unloading station (10) arranged sequentially along the first conveying direction, and a turning station (1) arranged along the second conveying direction, the turning station (1) being connected to the stringing station (7); The turning and bending station (1) is provided with a conveying component (2), a turning component (3) and a bending component (4) in sequence along the second conveying direction. The conveying component (2), the turning component (3) and the bending component (4) are all connected to the controller signal. The conveying component (2) is located below the turning component (3). The conveying component (2) is used to supply battery string groups to the turning component (3). The battery string group consists of N parallel battery strings, where N is an integer greater than or equal to 2. The turning component (3) is used to turn the battery string group over as a whole. The bending component (4) is used to bend the end welding strips of each battery string in the turned battery string group. The flipping assembly (3) includes a flipping plate (32), which has two adsorption surfaces (33) arranged opposite each other. The flipping plate (32) is provided with a moving group (34), which includes a plurality of moving slots (341) and a pusher plate (342). The plurality of moving slots (341) are arranged parallel to the surfaces of the two adsorption surfaces (33) along the second conveying direction. The pusher plate (342) is arranged on the adsorption surface (33).

2. The production line for tandem photovoltaic modules with reverse-folding welding strips according to claim 1, characterized in that: The conveying assembly (2) includes a horizontal drive structure (21), a lifting drive structure (22), and a conveying platform (23). Several battery strings are arranged parallel to each other along the second conveying direction on the conveying platform (23). The horizontal drive structure (21) is located below the conveying platform (23) along the second conveying direction. The lifting drive structure (22) is installed on the output end of the horizontal drive structure (21). The output end of the lifting drive structure (22) is fixedly connected to the conveying platform (23).

3. The production line for tandem photovoltaic modules with reverse-folding welding strips according to claim 1, characterized in that: Above the flipping plate (32) is a detection head (5) connected to the controller signal. The detection head (5) is used to perform visual inspection on the flipped battery pack. Between the flipping assembly (3) and the bending assembly (4) is a robot arm (11) and a transition platform (12) connected to the controller signal. The robot arm (11) is located on one side of the transition platform (12). The robot arm (11) is used to transfer the flipped battery pack to the bending assembly (4). The upper surface of the transition platform (12) is on the same plane as the upper surface of the flipping plate (32).

4. The production line for tandem photovoltaic modules with reverse-folding welding strips according to claim 3, characterized in that: The moving groove (341) is provided with a drive shaft (343) and a power unit. The drive shaft (343) is connected to the power unit and is rotatably connected to the moving groove (341). A slider (344) is provided on the drive shaft (343) and is rotatably connected to the drive shaft (343). Several sliders (344) are connected to a push plate (342).

5. The production line for tandem photovoltaic modules with reverse-folding welding strips according to claim 4, characterized in that: Two sets of sealing folding strips (345) are provided in the moving groove (341), and the two sets of sealing folding strips (345) are respectively arranged on both sides of the slider (344); the side wall of the sealing folding strip (345) is slidably and sealingly connected to the side wall of the moving groove (341), one end of the sealing folding strip (345) is connected to the slider (344), and the other end of the sealing folding strip (345) is connected to the inner wall of the moving groove (341).

6. The production line for tandem photovoltaic modules with reverse-folding welding strips according to claim 5, characterized in that: The upper surface of the transition platform (12) is provided with several rotating grooves (13). A placement plate (14) is provided in the rotating groove (13). The placement plate (14) is rotatably connected to the rotating groove (13) through a rotating shaft. A micro motor is provided in the rotating groove (13). The drive shaft of the micro motor is connected to the rotating shaft of the placement plate (14). The interior of the transition platform (12) is provided with a ramp groove (15). The rotating groove (13) is connected to the ramp groove (15). A waste box (16) is provided on the side of the ramp groove (15) away from the flip plate (32). The waste box (16) is slidably connected to the lower surface of the transition platform (12). The waste box (16) is connected to the ramp groove (15).

7. The production line for tandem photovoltaic modules with reverse-folding welding strips according to claim 3, characterized in that: A placement platform (17) is provided on one side of the robotic arm (11), and several good battery strings are placed on the placement platform (17).

8. The production line for tandem photovoltaic modules with reverse-folding welding strips according to claim 1, characterized in that: The flip plate (32) is provided with a first air passage and a second air passage that are independent of each other. The first air passage and the second air passage are respectively connected to two adsorption surfaces (33). The first air passage and the second air passage are both connected to an external air pump.

9. The production line for tandem photovoltaic modules with reverse-folding welding strips according to claim 1, characterized in that: The stringing station (7) includes a stringing robot connected to the controller signal. The stringing robot is used to transfer the battery string group that has completed the welding strip bending to the stringing station (7) for arrangement. The stringing robot includes a body structure and an adsorption execution structure. The adsorption execution structure is provided with several sets of adsorption strips arranged in parallel. Each set of adsorption strips adsorbs or releases a single battery string individually.

10. The production line for tandem photovoltaic modules with reverse-folding welding strips according to claim 1, characterized in that: The stacking inspection and unloading station (10) is equipped with a tape pre-fixing mechanism, an EL inspection mechanism and a diversion unloading mechanism connected to the controller signal. The tape pre-fixing mechanism is used to attach tape to the side end of the stacked part. The EL inspection mechanism is used to perform EL inspection on the stacked part. The diversion unloading mechanism is used to perform automatic diversion buffering operation according to the EL inspection result.

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