Visual inspection and bus bar welding equipment and photovoltaic module production line

Abstract

The utility model discloses visual inspection and bus bar welding equipment and a photovoltaic module production line, and belongs to the technical field of photovoltaic module production, the visual inspection and bus bar welding equipment comprises a conveying mechanism, a portal frame assembly, a welding mechanism and a detection mechanism, a battery piece and a welding strip of the photovoltaic module are visually detected through the camera module before welding, laser welding is carried out through the laser device after welding points of a bus bar are recognized and positioned, non-contact welding of the bus bar is achieved, the welding stability and welding precision of the photovoltaic module are effectively improved, and the welding quality of the photovoltaic module is improved. And the cracking rate of the photovoltaic module is reduced. According to the visual inspection and bus bar welding equipment and the photovoltaic module production line, the design is reasonable, visual inspection and bus bar welding are integrated in one procedure, an independent visual inspection or bus bar welding station does not need to be arranged, the equipment is simpler, and meanwhile the machining efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic component production, and specifically relates to a visual inspection and busbar welding device and a photovoltaic component production line. Background Art

[0002] At present, in the production process of photovoltaic modules, busbar welding basically uses resistance heating or electromagnetic induction heating. After the welded battery string is adsorbed by the adsorption mechanism, the finished busbar is placed on the transfer platform and aligned with the two ends of the module. Then, local welding is performed on both ends of the battery cell. After welding, it is transferred to the photovoltaic glass.

[0003] This method has disadvantages such as limited service life of the heating source, inability to stably control welding accuracy, and limited compatibility of welding component formats. In addition, the battery cells welded in strings need to be transported. Since the battery cells themselves are fragile, transit transportation, especially transportation after welding in strings, greatly increases the breakage rate of the components. Utility Model Content

[0004] In response to one or more of the above defects or improvement needs of the prior art, the utility model provides a visual inspection and busbar welding equipment to achieve non-contact welding of photovoltaic modules, reduce the crack rate, and improve welding stability and welding accuracy.

[0005] To achieve the above-mentioned object, one aspect of the utility model provides a visual inspection and busbar welding device, which includes a conveying mechanism, a gantry assembly, a welding mechanism and a detection mechanism;

[0006] The conveying mechanism extends along the X-axis direction and is used to convey the photovoltaic module along the X-axis direction;

[0007] The gantry assembly includes a gantry, which extends along the Y-axis direction and spans above the conveying mechanism;

[0008] The welding mechanism includes a welding assembly and a pressing assembly, wherein the pressing assembly is arranged on the gantry and used to press down the busbar of the photovoltaic assembly placed on the conveying mechanism, and the welding assembly includes a laser, which is arranged on the gantry and located above the pressing assembly and used to perform laser welding on the busbar;

[0009] The detection mechanism comprises a camera assembly, which is arranged on a gantry and is used to detect welding strips and / or battery cells of a photovoltaic module and to identify and locate busbar welding points of the photovoltaic module.

[0010] As a further improvement of the present invention, the camera components are arranged at intervals of several pieces along the Y-axis direction, and the pressing components are arranged at intervals of several pieces along the Y-axis direction;

[0011] The gantry is provided with a Y-axis moving assembly, and the welding assembly is provided on the Y-axis moving assembly, so that the welding assembly is driven by the Y-axis moving assembly to weld the welding points of the busbar in sequence along the Y-axis direction.

[0012] As a further improvement of the present invention, X-axis moving mechanisms are respectively arranged on both sides of the conveying mechanism along the X-axis direction, and the two ends of the gantry assembly are respectively arranged on the X-axis moving mechanisms, so that the gantry assembly can be driven to move along the X-axis direction through the X-axis moving mechanisms.

[0013] As a further improvement of the utility model, the X-axis moving mechanism includes a servo motor, a gear rack structure, a gear reducer, a linear guide rail and a slider;

[0014] The gear rack structure is extended and arranged along the X-axis direction and is connected to the servo motor so as to move along the X-axis direction under the drive of the servo motor; the gear reducer is connected to the servo motor; the linear guide is arranged in parallel and spaced apart from the gear rack structure; one end of the slider is connected to the gear rack structure, and the other end is slidably connected to the linear guide; the gantry assembly is connected and arranged on the slider so as to drive the gantry assembly to reciprocate along the X-axis direction through the slider.

[0015] As a further improvement of the present invention, the camera assembly is arranged on the other side of the gantry relative to the welding assembly.

[0016] As a further improvement of the utility model, the pressing assembly includes a slide cylinder and a pressing block module; the pressing block module is arranged in a plurality along the Y-axis direction and is detachably connected to the slide cylinder through a mounting plate so as to be lifted and moved relative to the conveying mechanism under the drive of the slide cylinder;

[0017] The pressing block module includes a mounting block and a pressing block; the mounting block is connected to the mounting plate and is provided with a hollow groove, and the laser emitted by the laser passes through the hollow groove to weld the busbar welding points of the photovoltaic module; the pressing block is connected and arranged below the mounting block to press the busbar near the welding point.

[0018] As a further improvement of the utility model, the pressing block module also includes a fixing block and a compression spring;

[0019] Mounting grooves are also provided on the mounting blocks on both sides of the hollow groove; the pressure block is hollowly arranged corresponding to the hollow groove, and the two ends of the pressure block are respectively clamped in the mounting grooves through a fixing block; the compression spring is arranged in the mounting groove, one end of which is connected to the pressure block, and the other end is connected to the fixing block, and the pressure block can float up and down through the compression spring.

[0020] As a further improvement of the present invention, one or more intervally arranged pressure strips extending along the X direction are arranged in the middle of the hollow groove.

[0021] As a further improvement of the utility model, the slide cylinder and the pressure block module are arranged in a plurality along the Y-axis direction.

[0022] As a further improvement of the present invention, the conveying mechanism includes a belt conveyor line and a drive assembly; the belt conveyor line includes a plurality of synchronous belts extending along the X-axis direction and spaced apart from each other, and the plurality of synchronous belts convey the photovoltaic components along the X-axis direction under the drive of the drive assembly.

[0023] Another aspect of the utility model provides a photovoltaic module production line, including cell and bus bar arrangement equipment, welding strip arrangement equipment and any of the above-mentioned visual inspection and bus bar welding equipment and welding equipment arranged in sequence along the production line direction, and a transmission module is arranged between every two devices to transmit the photovoltaic modules between the two devices.

[0024] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0025] In general, compared with the prior art, the above technical solutions conceived by the utility model have the following beneficial effects:

[0026] (1) The utility model adopts the above-mentioned technical solution to integrate visual inspection and bus bar welding into one process, without the need to set up a separate visual inspection or bus bar welding station, making the equipment more concise and improving the processing efficiency.

[0027] (2) The visual inspection and busbar welding equipment of the utility model realizes the transportation of the whole panel of photovoltaic modules by setting up a conveying mechanism, and simultaneously sets up a welding mechanism and a detection mechanism on the gantry for coordinated operation, so as to perform visual inspection of the battery cells and welding strips of the photovoltaic modules through a camera component before welding, and identify and locate the welding points of the busbars, and then perform laser welding through a laser to realize non-contact welding of the busbars, thereby effectively improving the welding stability and welding accuracy of the photovoltaic modules and reducing the cracking rate of the photovoltaic modules.

[0028] (3) The visual inspection and busbar welding equipment of the utility model improves the adaptability of the equipment by detachably connecting the pressing block module to the slide cylinder so as to adjust and change the installation quantity and installation distance of each structure of the pressing block module according to the layout of the multi-main-grid battery cell; and by connecting the end of the pressing block to the compression spring so as to achieve the floating of the pressing block when pressed down, so as to adapt to the compression of the welding strip at different heights and reduce the risk of battery cell fragmentation.

[0029] (4) The visual inspection and busbar welding equipment and photovoltaic module production line of the utility model are reasonably designed and can effectively perform non-contact busbar welding on photovoltaic modules that have been arranged in an entire layout but have not yet been welded with welding strips, thereby avoiding the cracking of battery strings due to the difficulty in releasing stress during transportation after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure of the visual inspection and busbar welding equipment in the embodiment of the utility model;

[0032] Figure 2 It is a top view structural schematic diagram of the visual inspection and busbar welding equipment in the embodiment of the utility model;

[0033] Figure 3 It is a structural schematic diagram of a welding mechanism in an embodiment of the utility model;

[0034] Figure 4 is a schematic structural diagram of a camera assembly in an embodiment of the utility model;

[0035] Figure 5 It is a structural schematic diagram of the pressing assembly in the embodiment of the utility model;

[0036] Figure 6 This is a schematic diagram of the structure of the briquetting module in the embodiment of the utility model;

[0037] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. Belt conveyor line; 2. Centering and positioning alignment assembly; 3. Front and rear clamping and alignment assembly; 4. Gantry assembly; 401. Gantry; 402. Y-axis moving assembly; 403. Crossbeam; 5. X-axis moving mechanism; 6. Welding assembly; 7. Camera assembly; 701. Camera; 702. Light source; 8. Pressing assembly; 801. Mounting plate; 802. Slide cylinder; 803. Pressing block module; 8031. Mounting block; 8032. Fixed block; 8033. Compression spring; 8034. Pressing block; 9. Photovoltaic module. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0039] In the description of the present invention, it should be understood that, unless otherwise expressly specified and limited, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In addition, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] The existing busbar welding technology has the disadvantages of limited heating source life, uncontrolled welding precision, and limited compatibility of welding module layouts. In addition, the battery cells welded in strings need to be transported. Since the battery cells themselves are fragile, the transit transportation, especially the transportation after welding in strings, greatly increases the breakage rate of the module. At the same time, in the method of welding the entire panel of the module, there is a problem that a separate busbar welding station needs to be set up, resulting in a longer production line.

[0044] Example:

[0045] See also Figure 1 to Figure 6 The visual inspection and busbar welding equipment in the preferred embodiment of the utility model includes a conveying mechanism, a welding mechanism and a detection mechanism, so that the photovoltaic module 9 to be welded is conveyed to the machine platform by the conveying mechanism, the photovoltaic module 9 to be welded is non-contact welded by the welding mechanism, and the welding strip and / or battery cell is visually inspected by the detection mechanism. The utility model adopts the above technical solution to integrate visual inspection and busbar welding in one process, without the need to set up a separate visual inspection or busbar welding station, making the equipment more concise and improving the processing efficiency.

[0046] It is understandable that the photovoltaic module 9 in the embodiment of the utility model includes a glass substrate, a heat-sealing film such as EVA or POE film, etc., arranged on the glass substrate, and cells, welding strips, bus bars, etc. arranged in a whole page. It is known to those skilled in the art that the arrangement of cells, welding strips and bus bars can be determined according to the module layout. For a back-contact solar cell, taking a 72-cell layout as an example, 72 cells are arranged in rows and columns on a glass substrate (which may also include a heat-sealing film), and the tops of two adjacent cells are connected by welding strips, and the required number of welding strips are arranged on the cells, and one or more bus bars extend along the width direction of the photovoltaic module to connect the welding strips. For example, three bus bars are placed in the front, back and middle of the photovoltaic module, respectively. The visual inspection and bus bar welding equipment of the utility model detects the position of the cells and / or welding strips and the bus bars through a detection mechanism, and welds the bus bars. Specifically, the welding strips in contact with the bus bars are laser welded to the bus bars through a welding mechanism.

[0047] Specifically, if Figure 1 and Figure 2 As shown in the figure, the conveying mechanism in the preferred embodiment includes a belt conveyor line 1 and a driving component; wherein the belt conveyor line 1 includes a plurality of synchronous belts extending along the X-axis direction and spaced apart from each other; the driving component includes a synchronous wheel, a speed regulating motor and other structural components, so that the synchronous wheel is driven to rotate by the speed regulating motor, and the synchronous belt is driven by the synchronous wheel, and then the photovoltaic components 9 that have been arranged completely are conveyed along the X-axis to the inspection welding position by the synchronous belt, and the glass substrate after the inspection welding is completed is conveyed and unloaded, flows out of the machine, and enters the next process.

[0048] Preferably, at least one pair of centering and positioning alignment components 2 and / or at least one pair of front and rear clamping and alignment components 3 are also provided in the conveying mechanism; wherein, the centering and positioning alignment components 2 include slide cylinders, and each pair of centering and positioning alignment components 2 are arranged on both sides of the belt conveyor line 1 along the X-axis, so as to position the short side direction of the glass substrate by using the inconsistent cylinder diameters of the slide cylinders in the centering and positioning alignment components 2 on both sides, and can be adjusted and switched according to the size of the glass substrate.

[0049] Correspondingly, the front and rear clamping and aligning components 3 include a rotary clamping cylinder. Each pair of front and rear clamping and aligning components 3 is arranged at both ends of the belt conveyor line 1 along the X direction, so as to position the long side of the glass by retracting the rotary clamping cylinder to maintain the consistency of the incoming material positioning.

[0050] Further, the welding mechanism and the detection mechanism in the preferred embodiment are both arranged on the gantry assembly 4, wherein the welding mechanism includes a welding assembly 6 and a pressing assembly 8, and the detection mechanism includes a camera assembly 7. The gantry assembly 4 includes a gantry 401, which extends along the Y axis and spans above the conveying mechanism.

[0051] Furthermore, in a preferred embodiment, the gantry 401 is arranged on two X-axis moving mechanisms 5, and the two X-axis moving mechanisms 5 are respectively arranged on both sides of the conveying mechanism along the X-axis direction, and the two ends of the gantry 401 are respectively arranged on the X-axis moving mechanisms 5 on both sides, so that the gantry 401 is driven to move along the X-axis direction through the X-axis moving mechanism 5, so that the gantry 401 covers the length direction of the photovoltaic module 9. In actual use, by moving the gantry 401 along the X-axis direction, the position of the battery cells and / or welding strips and the bus bar position on the photovoltaic module 9 are detected by the camera assembly 7 arranged on the gantry 401, and the gantry 401 is moved to the top of different bus bars, and the bus bars are welded by the welding assembly 6 and the pressing assembly 8 arranged on the gantry assembly 4.

[0052] Furthermore, a Y-axis moving component 402 is disposed on the gantry 401 , and the Y-axis moving component 402 extends continuously along the Y-axis.

[0053] like Figure 3 As shown in the figure, the welding assembly 6 in the preferred embodiment is arranged above the pressing assembly 8, and includes a laser, which is arranged on the Y-axis moving assembly 402, so that the laser is driven by the Y-axis moving assembly 402 to move along the Y-axis, so that the working range of the laser covers the width of the photovoltaic assembly 9 under the drive of the Y-axis moving assembly 402, so as to realize the welding of a bus bar.

[0054] like Figure 3 and Figure 4 As shown in , the camera assembly 7 in the preferred embodiment is connected and arranged on the gantry 401, and preferably, is arranged on the other side of the gantry 401 relative to the welding assembly 6, including multiple cameras 701 spaced apart along the Y direction. The photographing field of view of multiple cameras 701 covers the width of the photovoltaic assembly 9, and can check the position of the battery cells and / or welding strips and bus bars in the photovoltaic assembly 9 to be welded, such as detecting the offset of the welding strips, the electrical position of the battery PAD, etc., to provide a position basis for the subsequent welding of the welding strips and battery cells. The camera 701 can also take pictures of the relative position of the bus bar and the welding strip to capture features, providing a position basis for bus bar welding.

[0055] Preferably, a light source 702 is also provided corresponding to each camera 701 in the camera assembly 7, and is further preferably an infrared light source, to provide a photo lighting function for the camera 701, so that the imaging effect is clear and the accuracy of positioning is ensured.

[0056] Furthermore, if Figure 5As shown in , the pressing assembly 8 and the welding assembly 6 are arranged on the same side of the gantry 401 and below the welding assembly 6. The pressing assembly 8 in the preferred embodiment includes a pressing block module 803 and a slide cylinder 802; wherein the slide cylinder 802 is connected and arranged on the gantry 401, specifically, it can be arranged on the crossbeam 403 arranged at a height close to the photovoltaic assembly 9, and the pressing block module 803 is arranged in a plurality of positions corresponding to each welding strip and bus bar along the Y-axis direction, and is detachably connected to the slide cylinder 802 through the mounting plate 801, so as to be lifted and lowered relative to the conveying mechanism under the drive of the slide cylinder 802. See Figure 3 , the pressing assembly 8 can be arranged in multiple numbers in the Y direction to cover the width of the photovoltaic assembly 9. Specifically, the pressing block module 803 and the slide cylinder 802 are arranged in multiple numbers along the Y direction.

[0057] Preferably, the slide cylinder 802 is a transverse variable-pitch slide cylinder, so as to be compatible with the front, middle and rear bus bar welding according to the layout conditions, and switch positions through automated program control.

[0058] Furthermore, if Figure 6 The pressing block module 803 in the preferred embodiment shown in the figure includes a mounting block 8031 ​​and a pressing block 8034, wherein the mounting block 8031 ​​is an L-shaped mounting block, the mounting block 8031 ​​is connected to the mounting plate 801, and a hollow groove is set on the mounting block 8031 ​​to expose the welding point, and the laser emitted by the laser passes through the hollow groove to weld the welding point of the photovoltaic module 9.

[0059] As a preferred embodiment, the hollow groove is provided with a pressure strip extending along the X direction, such as one or more pressure strips arranged at intervals, as long as the hollow part leaks out the welding point. The setting of the pressure strip can better press the busbar without affecting the light blocking, and solve the problem of cold solder joint caused by loose pressing.

[0060] Correspondingly, the pressing block 8034 is connected and arranged below the mounting block 8031 ​​so as to press the bus bar near the welding point through the pressing block 8034 .

[0061] Preferably, mounting grooves are respectively provided on the mounting blocks 8031 ​​on both sides of the hollow groove, and the pressure block 8034 is hollowly arranged corresponding to the hollow groove; at the same time, a fixed block 8032 and a compression spring 8033 are also provided in the pressure block module 803, so that the two ends of the pressure block 8034 can be respectively clamped in the two mounting grooves through the fixed block 8032, and the compression spring 8033 is set in the mounting groove, and one end of the compression spring is connected to the pressure block 8034, and the other end is connected to the fixed block 8032, so that the pressure block 8034 can float up and down through the compression spring 8033 to adapt to the compression of the bus bar at different heights and realize flexible downward pressure.

[0062] The present application is not limited thereto. As other practicable forms, the pressing assembly may include a cylinder and a pressing plate connected to the cylinder, and a hollow is provided on the pressing plate to expose the position of the busbar to be welded. For example, the pressing plate may be a hollow rectangular frame, and the hollow portion may expose the position of the busbar to be welded.

[0063] Specifically, the X-axis moving mechanism 5 includes a servo motor, a gear reducer, a gear rack structure, a linear guide rail and a slider; wherein the gear rack structure is extended along the X-axis direction and connected to the servo motor to convert the circular motion output by the servo motor into linear motion along the X-axis direction; the gear reducer is connected to the servo motor to convert the movement speed of the gear rack structure and improve the load carrying capacity of the servo motor.

[0064] At the same time, the linear guide rail is arranged in parallel with the gear rack structure, and one end of the slider is connected to the gear rack structure, and the other end is slidably connected to the linear guide rail, so that the slider can slide back and forth along the linear guide rail driven by the gear rack structure.

[0065] Correspondingly, the two ends of the gantry 401 are respectively connected to the sliders on both sides, so that the welding mechanism is driven to move back and forth along the X-axis direction through the sliders.

[0066] Of course, in actual production, the gear rack structure can also be replaced by a linear motor, and the linear motor can directly drive the slider to slide along the linear guide rail.

[0067] Furthermore, when the visual inspection and busbar welding equipment in the utility model is used to perform busbar laser welding, the following steps are specifically included:

[0068] (11) The unwelded photovoltaic modules 9 arranged in a whole page are fed to the welding position in the visual inspection and busbar welding equipment through the belt conveyor line 1, and are positioned and aligned front, back, left and right through the centering alignment assembly 2 and the front and rear clamping alignment assembly 3 to ensure that the incoming materials remain in the same position every time.

[0069] (12) The gantry 401 is driven by the gear rack structure to move along the X-axis to the Nth row of busbars for photographing, and the relative position of the busbars is photographed and captured by the camera 701;

[0070] The gantry 401 moves to the Nth row of busbar welding positions through the gear rack structure according to the positioning result. The pressing block module 803 is driven by the slide cylinder 802 to press down and fix the busbar. The Y-axis moving component 402 drives the laser to move along the Y-axis direction to weld the busbar and the welding strip connected thereto one by one. After the welding is completed, the pressing block module 803 is retracted under the action of the slide cylinder 802.

[0071] (13) Repeat step (2) until all bus bars are welded;

[0072] (14) The centering and positioning assembly 2 and the front and rear clamping and alignment assembly 3 are returned to their original positions, and the welded photovoltaic assembly 9 is transported and unloaded via the belt conveyor line 1.

[0073] When using the visual inspection and busbar welding equipment in the utility model for visual inspection, the following steps are specifically included:

[0074] (21) The unwelded photovoltaic modules 9 arranged in a whole page are fed to the welding position in the visual inspection and busbar welding equipment through the belt conveyor line 1, and are positioned and aligned front, back, left and right through the centering alignment assembly 2 and the front and rear clamping alignment assembly 3 to ensure that the incoming materials remain in the same position every time.

[0075] (22) The gantry 401 moves one step along the X-axis driven by the gear rack structure, and visually inspects the position of the cell and the soldering strip through the camera 701, and then moves one step along the X-axis, and visually inspects the position of the cell and the soldering strip through the camera 701, until the visual inspection of the cell and the soldering strip of the entire photovoltaic module is completed. In this step, the gantry 401 can also move continuously along the X-axis driven by the gear rack structure, and the camera 701 performs flying shooting.

[0076] (23) The centering and positioning assembly 2 and the front and rear clamping and alignment assembly 3 are returned to their original positions, and the welded photovoltaic assembly 9 is transported and unloaded via the belt conveyor line 1.

[0077] Of course, the relative position of the bus bar and the welding strip is photographed and captured, which can also be completed in the visual inspection (22). Execute step (11) or (21), and then execute (22). In this step, the relative position of the bus bar and the welding strip is photographed and captured, and then the steps of (12) and (13) are executed without taking photos to complete welding. Finally, execute (14) or (23) to complete visual inspection and welding.

[0078] The utility model adopts the above-mentioned technical solution to integrate visual inspection and bus bar welding into one process, without the need to set up separate visual inspection or bus bar welding stations, making the equipment more concise and improving the processing efficiency.

[0079] Furthermore, the photovoltaic module production line of the utility model includes a cell and bus bar arrangement device, a welding strip arrangement device, the above-mentioned visual inspection and bus bar welding device, and a welding device, which are sequentially arranged along the production line direction, so that before welding by the visual inspection and bus bar welding device, the cell and bus bar arrangement device arranges the cell and bus bar on the glass substrate according to the designed position and sequence, and then the welding strip arrangement device pulls, cuts, and transports the welding strip to arrange the welding strip on the glass substrate according to the designed position and sequence, so as to realize the whole-page arrangement of the photovoltaic module 9. This is the prior art and will not be described here. Accordingly, the photovoltaic module 9 with the whole page arrangement that has not been welded is transmitted to the visual inspection and bus bar welding device, and the cell and bus bar are welded by the welding strip, so as to directly complete the welding of the whole page photovoltaic module 9.

[0080] At the same time, a transmission module is provided between the battery cell and bus bar arrangement equipment and the welding strip arrangement equipment, and between the welding strip arrangement equipment and the visual inspection and bus bar welding equipment, so as to transmit the photovoltaic module 9 between the two devices.

[0081] The visual inspection and busbar welding equipment and photovoltaic module production line in the utility model are reasonably designed and can effectively perform non-contact busbar welding on photovoltaic modules that have been fully arranged but not yet welded with welding strips, thereby avoiding cracking caused by difficulty in releasing stress during transportation of battery strings after welding.

[0082] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A visual inspection and busbar welding device, characterized in that: It includes conveying mechanism, gantry assembly, welding mechanism and testing mechanism; The conveying mechanism extends along the X-axis direction and is used to convey the photovoltaic module along the X-axis direction; The gantry assembly includes a gantry, which extends along the Y-axis direction and spans above the conveying mechanism; The welding mechanism includes a welding assembly and a pressing assembly, wherein the pressing assembly is arranged on the gantry and used to press down the busbar of the photovoltaic assembly placed on the conveying mechanism, and the welding assembly includes a laser, which is arranged on the gantry and located above the pressing assembly and used to perform laser welding on the busbar; The detection mechanism comprises a camera assembly, which is arranged on a gantry and is used to detect welding strips and / or battery cells of a photovoltaic module and to identify and locate busbar welding points of the photovoltaic module.

2. The visual inspection and busbar welding equipment according to claim 1, characterized in that: The camera components are arranged at intervals of several numbers along the Y-axis direction, and the pressing components are arranged at intervals of several numbers along the Y-axis direction; The gantry is provided with a Y-axis moving assembly, and the welding assembly is provided on the Y-axis moving assembly, so that the welding assembly is driven by the Y-axis moving assembly to weld the welding points of the busbar in sequence along the Y-axis direction.

3. The visual inspection and busbar welding equipment according to claim 1, characterized in that: X-axis moving mechanisms are also provided on both sides of the conveying mechanism along the X-axis direction, and both ends of the gantry assembly are respectively provided on the X-axis moving mechanisms, so that the gantry assembly is driven to move along the X-axis direction through the X-axis moving mechanisms.

4. The visual inspection and busbar welding equipment according to claim 3, characterized in that: The X-axis moving mechanism includes a servo motor, a gear rack structure, a gear reducer, a linear guide rail and a slider; The gear rack structure is extended and arranged along the X-axis direction and is connected to the servo motor so as to move along the X-axis direction under the drive of the servo motor; the gear reducer is connected to the servo motor; the linear guide is arranged in parallel and spaced apart from the gear rack structure; one end of the slider is connected to the gear rack structure, and the other end is slidably connected to the linear guide; the gantry assembly is connected and arranged on the slider so as to drive the gantry assembly to reciprocate along the X-axis direction through the slider.

5. The visual inspection and busbar welding equipment according to claim 4, characterized in that: The camera assembly is arranged on the other side of the gantry relative to the welding assembly.

6. The visual inspection and busbar welding equipment according to any one of claims 1 to 5, characterized in that: The pressing assembly includes a slide cylinder and a pressing block module; the pressing block module is arranged in a plurality along the Y-axis direction and is detachably connected to the slide cylinder through a mounting plate so as to be lifted and moved relative to the conveying mechanism under the drive of the slide cylinder; The pressing block module includes a mounting block and a pressing block; the mounting block is connected to the mounting plate and is provided with a hollow groove, and the laser emitted by the laser passes through the hollow groove to weld the busbar welding points of the photovoltaic module; the pressing block is connected and arranged below the mounting block to press the busbar near the welding point.

7. The visual inspection and busbar welding equipment according to claim 6, characterized in that: The pressing block module also includes a fixed block and a compression spring; Mounting grooves are also provided on the mounting blocks on both sides of the hollow groove; the pressure block is hollowly arranged corresponding to the hollow groove, and the two ends of the pressure block are respectively clamped in the mounting grooves through a fixing block; the compression spring is arranged in the mounting groove, one end of which is connected to the pressure block, and the other end is connected to the fixing block, and the pressure block can float up and down through the compression spring.

8. The visual inspection and busbar welding equipment according to claim 6, characterized in that: One or more intervally arranged pressure strips extending along the X direction are arranged in the middle of the hollow groove.

9. The visual inspection and busbar welding equipment according to claim 6, characterized in that: The slide cylinder and the pressing block module are arranged in a plurality along the Y-axis direction.

10. The visual inspection and busbar welding equipment according to any one of claims 1 to 5, characterized in that: The conveying mechanism includes a belt conveyor line and a driving assembly; the belt conveyor line includes a plurality of synchronous belts extending along the X-axis direction and arranged at intervals from each other, and the plurality of synchronous belts convey the photovoltaic components along the X-axis direction under the drive of the driving assembly.

11. A photovoltaic module production line, characterized in that: It includes battery cell and bus bar arrangement equipment, welding strip arrangement equipment, visual inspection and bus bar welding equipment as described in any one of claims 1 to 10, and welding equipment, which are arranged in sequence along the production line direction, and a transmission module is arranged between every two devices to transmit photovoltaic components between the two devices.

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