Photovoltaic module defect detection device and detection method

Abstract

The invention relates to the technical field of photovoltaic component detection equipment, in particular to a photovoltaic component defect detection device and method.An intermittent driving device sequentially drives a conveying belt to conduct conveying motion and a sliding component to conduct sliding motion, and when the conveying belt drives a photovoltaic component to be conveyed into a detection camera obscura in an intermittent mode; the photovoltaic module is located at a detection position in the detection camera obscura and is connected with the power connection block, at the moment, the sliding piece starts to slide and drive the visual detection head to slide along the upper portion of the photovoltaic module, comprehensive detection of the photovoltaic module in the normal working state is achieved, and after detection, the sliding piece reversely slides and resets along the upper portion of the photovoltaic module. And meanwhile, the conveying belt conveys the next photovoltaic module to a detection position in the detection camera obscura, a cleaning plate located outside the detection camera obscura and connected with the detection camera obscura sequentially scrapes and cleans the top end surface of the photovoltaic module in the forward direction and the reverse direction, pre-cleaning operation is conducted on the photovoltaic module before detection, and the effect of considering comprehensiveness and high efficiency of photovoltaic module detection can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic component detection equipment, and in particular to a photovoltaic component defect detection device and a detection method. Background Art

[0002] Photovoltaic modules are usually composed of photovoltaic cells and their encapsulated frames. Common photovoltaic cells include silicon-based cells, flexible photovoltaic films, etc. The front of the photovoltaic module is used to receive light sources for power generation, and the back is usually connected to accessories such as wires and junction boxes. During production inspection, it is usually necessary to inspect and test the appearance defects and working conditions of the front of the photovoltaic module. In this regard, in the prior art, such as the photovoltaic panel defect detection device disclosed in Chinese patent document CN117929406A and the photovoltaic panel appearance detection device disclosed in Chinese patent document CN116087226B, the photovoltaic panels are continuously conveyed by a conveyor belt. When the photovoltaic panels are continuously conveyed through the inspection chamber, The photovoltaic panels are scanned and inspected by a scanning inspection head in the inspection chamber. At the same time, the cleaning mechanism inside or outside the inspection chamber is used to pre-clean the photovoltaic panels during transportation before inspection, so as to improve the accuracy of defect detection on the surface of the photovoltaic panels. The existing conventional inspection method is to design inspection tooling, and the photovoltaic panels to be inspected are placed in the tooling one by one and fixed, and then powered on for inspection in a working state. However, in actual production inspection, it is difficult to inspect the photovoltaic panels that are continuously transported in a working state, and it is obviously cumbersome and inefficient to use inspection tooling to fix the photovoltaic panels one by one, so there are few inspection methods that take into account both comprehensiveness and efficiency. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a photovoltaic module defect detection device and detection method to solve the problem that currently there is little ability to take into account both comprehensiveness and efficiency of photovoltaic module detection.

[0004] Based on the above purpose, the present invention provides a photovoltaic module defect detection device, including a detection dark box, a conveyor belt for conveying photovoltaic modules is provided along the length direction of the detection dark box, a detection light source is provided at the top of the detection dark box, and further includes:

[0005] A sliding member is arranged parallel to the conveyor belt, one end of the sliding member penetrates into the detection dark box and is slidably connected with the inner wall of the detection dark box, and the other end passes out of the detection dark box and is connected with a cleaning plate for scraping and cleaning the top surface of the photovoltaic module on the conveyor belt;

[0006] A visual inspection head is connected to one end of the sliding member that penetrates into the detection dark box, and the initial position of the visual inspection head is located at the transmission entrance end of the detection dark box close to the conveyor belt;

[0007] The power connection block is located in the detection dark box at one end close to the conveyor belt;

[0008] An intermittent drive device is arranged on the outer end of the detection dark box. One end of the intermittent drive device is transmission-connected to the conveyor belt, and the other end is transmission-connected to the sliding member, and is used to drive the conveyor belt to convey and the sliding member to slide in sequence. When the conveyor belt drives the photovoltaic component to be transported into the detection dark box, the photovoltaic component is connected to the power connection block, and the sliding member slides along the top of the photovoltaic component to perform visual inspection on the photovoltaic component. When the conveyor belt drives the next photovoltaic component to be transported into the detection dark box, the sliding member slides back in the opposite direction along the top of the photovoltaic component until the visual inspection head slides back to its initial position.

[0009] Preferably, the bottom end of the cleaning plate is provided with flexible bristles for scraping and cleaning the top surface of the photovoltaic module.

[0010] Preferably, the photovoltaic assembly includes a battery assembly and a frame encapsulated on the outside of the battery assembly, the bottom of the cleaning plate is designed with a telescopic structure, and both sides of the movable end of the bottom of the cleaning plate are connected to limit rods, and flexible bristles are arranged on the bottom of the movable end of the cleaning plate. Limit platforms are erected on both sides of the conveyor belt outside the detection dark box, and the top of the limit platform is designed with a slope facing the detection dark box. When the sliding part slides along the top of the photovoltaic assembly for detection, the flexible bristles are pressed against and scraped against the top surface of the photovoltaic assembly outside the detection dark box until the bottom of the movable end of the cleaning plate abuts against the inner wall of the frame, and when the sliding part slides back in the opposite direction along the top of the photovoltaic assembly, the limit rod slides along the slope of the limit platform, driving the movable end of the cleaning plate to be lifted upward, so that the bottom end of the cleaning plate passes over the frame and moves to the top surface of the next photovoltaic assembly until the visual inspection head slides back to its initial position, and the bottom of the movable end of the cleaning plate abuts against the inner side of the frame of the next photovoltaic assembly.

[0011] Preferably, the limit rod is unidirectionally rotatably connected to both sides of the cleaning plate. When the sliding member is detected by sliding along the top of the photovoltaic component, the limit rod moves synchronously with the cleaning plate until it abuts against the side end of the limit platform. The limit platform pushes the limit rod to rotate unidirectionally, so that the limit rod slides along the side end of the limit platform.

[0012] Preferably, the intermittent drive device includes a driving wheel rotatably connected to the outer end of the detection dark box, the driving wheel is an incomplete gear, and the upper and lower ends of the driving wheel are respectively meshed with driven gears, one end of the driven gear is connected to a connecting shaft, and the connecting shaft is rotatably connected to the side wall of the detection dark box, the end of the connecting shaft at the lower end that passes through the detection dark box is connected to the roller of the conveyor belt, and the end of the connecting shaft at the upper end that passes through the detection dark box is connected to an internal gear, and is meshed with the sliding member through the internal gear.

[0013] Preferably, the sliding member comprises sliding strips slidably connected to the inner side walls on both sides of the detection dark box.

[0014] Preferably, a shading member is connected in the middle of the sliding bar, the length direction of the shading member is parallel to the width direction of the photovoltaic module, and a photothermal detection head is provided in the detection dark box.

[0015] The present invention also provides a photovoltaic module defect detection method, comprising the following steps:

[0016] The conveyor belt is driven to move and the sliding member is driven to slide in sequence by the intermittent driving device. When the conveyor belt drives the photovoltaic module to be transported into the detection dark box, the photovoltaic module is located at the detection position in the detection dark box and is connected to the power connection block. At this time, the sliding member starts to slide and drives the visual inspection head to slide along the top of the photovoltaic module for visual inspection of the photovoltaic module.

[0017] After the inspection is completed, the sliding part slides back along the top of the photovoltaic module to reset until the visual inspection head slides back to its initial position and stops. At the same time, the conveyor belt starts to convey until the next photovoltaic module is conveyed to the inspection position in the inspection dark box for the next round of inspection. At the same time, the cleaning plate connected to the outside of the inspection dark box can scrape and clean the top surface of the photovoltaic module in forward and reverse directions in turn, and pre-clean the photovoltaic module before inspection.

[0018] The beneficial effects of the present invention are as follows: the conveyor belt and the sliding member are driven to move in sequence by an intermittent driving device. When the conveyor belt drives the photovoltaic component to be transported into the detection dark box, the photovoltaic component is located at the detection position in the detection dark box and is connected to the power connection block. At this time, the sliding member starts to slide, driving the visual inspection head to slide along the top of the photovoltaic component, which is used to perform visual inspection of the photovoltaic component and realize comprehensive inspection of the photovoltaic component under normal working conditions. After the inspection is completed, the sliding member slides back in the opposite direction along the top of the photovoltaic component to reset until the visual inspection head slides back to its initial position and stops. At the same time, the conveyor belt starts to move in a conveying manner until the next photovoltaic component is transported to the detection position in the detection dark box for the next round of inspection. At the same time, the cleaning plate connected outside the detection dark box is able to scrape and clean the top surface of the photovoltaic component in forward and reverse directions in turn, and pre-clean the photovoltaic component before inspection, thereby achieving an effect that takes into account both comprehensiveness and efficiency of photovoltaic component inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1It is a schematic diagram of the overall structure when the photovoltaic assembly of the present invention is intermittently transferred to the detection position in the detection dark box and the sliding member starts to slide;

[0021] Figure 2 For the present invention Figure 1 The enlarged schematic diagram of point A in the middle;

[0022] Figure 3 It is a schematic structural diagram of the intermittent drive device of the present invention;

[0023] Figure 4 is a bottom view structural schematic diagram of the shading member of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the sliding member of the present invention when it slides along the top of the photovoltaic module and completes the detection;

[0025] Figure 6 For the present invention Figure 5 The enlarged schematic diagram of point B in the middle;

[0026] Figure 7 It is a structural schematic diagram of the sliding member of the present invention in the reverse sliding return stroke reset;

[0027] Figure 8 For the present invention Figure 7 The enlarged schematic diagram of the center C;

[0028] Fig. 9 This is a structural schematic diagram of the visual inspection head of the present invention sliding back to its initial position while the conveyor belt is in the conveying motion.

[0029] The markings in the figure are:

[0030] 1. Detection dark box; 2. Photovoltaic module; 21. Frame; 3. Conveyor belt; 31. Roller; 4. Detection light source; 5. Sliding part; 6. Cleaning plate; 61. Flexible bristles; 7. Visual inspection head; 8. Power connection block; 9. Intermittent drive device; 91. Driving wheel; 92. Driven gear; 93. Connecting shaft; 94. Internal gear; 10. Limit rod; 11. Limit platform; 12. Positioning block; 121. Reset elastic part; 13. Positioning strip; 14. Shading part; 15. Photothermal inspection head. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0032] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] like Figure 1 , Figure 2 , Figure 3 As shown, a photovoltaic module defect detection device includes a detection dark box 1, a conveyor belt 3 for conveying photovoltaic modules 2 is penetrated along the length direction of the detection dark box 1, a detection light source 4 is provided at the top of the detection dark box 1, and also includes a sliding member 5 arranged parallel to the conveyor belt 3, one end of the sliding member 5 penetrates into the detection dark box 1 and is slidably connected to the inner side wall of the detection dark box 1, and the other end passes through the outside of the detection dark box 1 and is connected to a cleaning plate 6 for scraping and cleaning the top surface of the photovoltaic module 2 on the conveyor belt 3, and a visual detection head 7 is connected to the end of the sliding member 5 that penetrates into the detection dark box 1, and the initial position of the visual detection head 7 is located in the detection dark box 1 near the transmission entrance end of the conveyor belt 3, and the power connection block 8 is provided. At one end of the detection dark box 1 near the conveyor belt 3, an intermittent drive device 9 is arranged on the outer end of the detection dark box 1, one end of the intermittent drive device 9 is transmission connected to the conveyor belt 3, and the other end is transmission connected to the sliding member 5, which is used to drive the conveyor belt 3 to convey and the sliding member 5 to slide in sequence. When the conveyor belt 3 drives the photovoltaic component 2 to be transported into the detection dark box 1, the photovoltaic component 2 is connected to the power connection block 8, and the sliding member 5 slides along the top of the photovoltaic component 2 for visual inspection of the photovoltaic component 2. When the conveyor belt 3 drives the next photovoltaic component 2 to be transported into the detection dark box 1, the sliding member 5 slides back in the opposite direction along the top of the photovoltaic component 2 until the visual inspection head 7 slides back to its initial position.

[0034] The present invention is provided with an inspection dark box 1, a conveyor belt 3 for conveying photovoltaic modules 2 is passed through along the length direction of the inspection dark box 1, an inspection light source 4 is provided at the top end of the inspection dark box 1, and in particular, it also includes a sliding member 5 arranged parallel to the top of the conveyor belt 3, one end of the sliding member 5 passes through the inspection dark box 1 and is slidably connected with the inner side wall of the inspection dark box 1, and the other end passes through the outside of the inspection dark box 1 and is connected with a cleaning plate 6 for scraping and cleaning the top surface of the photovoltaic modules 2 on the conveyor belt 3, a visual inspection head 7 is connected to the end of the sliding member 5 passing through the inspection dark box 1, the initial position of the visual inspection head 7 is located at the transmission entrance end of the inspection dark box 1 close to the conveyor belt 3, and the power connection block 8 is arranged at one end of the inspection dark box 1 close to the conveyor belt 3, wherein the inspection light source 4 can be an existing conventional light source, which can meet the lighting inspection needs in the inspection dark box 1 on the one hand, and can illuminate the photovoltaic modules 2 to enable them to work normally on the other hand. Adopt existing conventional optical camera and other non-contact image acquisition equipment to capture image and analyze the outer surface of the top of photovoltaic module 2, and realize detection by manually or automatically identifying appearance defects, damage, pollution, etc. on the surface of photovoltaic module 2. The power connection block 8 can be arranged in the detection dark box 1 near the conveying outlet end of conveyor belt 3, and the power connection block 8 is connected to the electrode sheet, and one end of the electrode sheet is connected to adjustable load, junction box and other components through a wire. Optionally, the electrode sheet itself can be attached to the upper part of the conveying surface of conveyor belt 3 and designed as a thin sheet for connecting to the electrode end on the back of photovoltaic module 2, or it can be attached to the lower part of the conveying surface of conveyor belt 3. There are multiple narrow strips of hollowing on the conveyor belt 3 along its conveying direction, and the electrode sheet is arranged in a spring sheet structure. The electrode end on the back of photovoltaic module 2 is placed opposite to the hollow part on conveyor belt 3 and connected to the electrode sheet on the power connection block 8, so that the photovoltaic module 2 conveyed into the detection dark box 1 is in normal working state;

[0035] At the same time, one end of the intermittent drive device 9 is connected to the conveyor belt 3, and the other end is connected to the sliding member 5, which is used to drive the conveyor belt 3 to move and the sliding member 5 to slide in sequence. When the conveyor belt 3 drives the photovoltaic module 2 to be transported into the detection dark box 1, Figure 1 , Figure 2 As shown, the conveyor belt 3 stops conveying, and the photovoltaic module 2 is intermittently conveyed to the detection position in the detection dark box 1. The photovoltaic module 2 is connected to the power connection block 8, and the sliding member 5 starts to slide, driving the visual inspection head 7 to slide along the top of the photovoltaic module 2, which is used to perform visual inspection on the photovoltaic module 2 and realize comprehensive inspection of the photovoltaic module 2 under normal working conditions, such as appearance defects, surface conditions, surface heating phenomena, output voltage and current conditions, etc. under the working condition. As the visual inspection head 7 slides through the complete length above the photovoltaic module 2, as shown in FIG. Figure 5 , Figure 6As shown, the detection is completed. At this time, the conveyor belt 3 starts to convey and drives the next photovoltaic component 2 to be conveyed into the detection dark box 1. Figure 7 , Figure 8 As shown, the sliding member 5 slides back along the top of the photovoltaic module 2 to reset until the visual inspection head 7 slides back to its initial position, as shown in FIG. Fig. 9 As shown, the sliding member 5 stops moving until the next photovoltaic module 2 is transferred to the detection position in the detection dark box 1, as shown in FIG. Figure 1 As shown, the next round of detection action is carried out, thereby achieving the effect of being able to take into account both the comprehensiveness and efficiency of the detection of the photovoltaic module 2. At the same time, the conveyor belt 3 and the sliding member 5 are driven by the intermittent driving device 9 to intermittently move in the same direction in sequence. The cleaning plate 6 on the sliding member 5 that is located outside the detection dark box 1 is able to scrape and clean the top surface of the photovoltaic module 2 in the forward and reverse directions in sequence, and the photovoltaic module 2 before detection is pre-cleaned. At the same time as the normal transmission, two cleaning actions in the forward and reverse directions are realized at the same time, which has a better cleaning effect and helps to further improve the detection accuracy of the surface of the photovoltaic module 2.

[0036] In an embodiment of the present invention, Figure 1 , Figure 2 As shown, the bottom end of the cleaning plate 6 is provided with flexible bristles 61 for scraping and cleaning the top surface of the photovoltaic module 2 .

[0037] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown, the photovoltaic assembly 2 includes a battery assembly and a frame 21 encapsulated on the outside of the battery assembly. The bottom of the cleaning plate 6 is designed as a telescopic structure, which is similar to the existing conventional telescopic sleeve structure, and the two sides of the movable end of the bottom of the cleaning plate 6 are connected to limit rods 10, and the length direction of the limit rods 10 is set parallel to the width direction of the photovoltaic assembly 2. Flexible bristles 61 are set on the bottom of the movable end of the cleaning plate 6, and limit platforms 11 are erected on both sides of the conveyor belt 3 outside the detection dark box 1. The top of the limit platform 11 is designed to be sloped on the side facing the detection dark box 1. When the sliding member 5 slides along the top of the photovoltaic assembly 2 for detection, the flexible bristles 61 are pressed against and scraped against the top surface of the photovoltaic assembly 2 outside the detection dark box 1, as shown in FIG. Figure 5 , Figure 6 As shown, until the bottom of the movable end of the cleaning plate 6 abuts against the inner wall of the frame 21, if the photovoltaic component 2 outside the detection dark box 1 is too far away from the detection dark box 1 or the photovoltaic component 2 under detection, the bottom of the movable end of the cleaning plate 6 abuts against the inner wall of the frame 21, driving the photovoltaic component 2 outside the detection dark box 1 to move further closer to the detection dark box 1, so that it reaches the standard transfer position;

[0038] When the sliding member 5 slides back along the top of the photovoltaic module 2, the conveyor belt 3 also starts to convey and drives the next photovoltaic module 2 to be conveyed into the inspection dark box 1. At this time, the cleaning plate 6 must be moved to the outside of the frame 21 of the next photovoltaic module 2, and then moved to the frame 21 of the next photovoltaic module 2. Figure 7 , Figure 8 As shown, the limit rod 10 moves through the limit platform 11 and slides along the slope of the limit platform 11, driving the movable end of the cleaning plate 6 to lift upward, so that the bottom end of the cleaning plate 6 passes over the frame 21 and moves to the top surface of the next photovoltaic component 2, until the visual inspection head 7 slides back to its initial position, the bottom end of the movable end of the cleaning plate 6 abuts against the inner side of the frame 21 of the next photovoltaic component 2, the sliding member 5 stops moving, and the next photovoltaic component 2 is conveyed to the inspection position in the inspection dark box 1. At this time, as shown in FIG. Figure 1 As shown, the next photovoltaic component 2 is transferred to the position to be detected outside the detection dark box 1. If the photovoltaic component 2 at the position to be detected outside the detection dark box 1 is too close to the detection dark box 1, since the position of the sliding member 5 sliding back and forth is fixed, the bottom of the active end of the cleaning plate 6 abuts against the inner wall of the frame 21, driving the photovoltaic component 2 outside the detection dark box 1 to move further away from the detection dark box 1 to reach the standard transmission position. When the sliding member 5 slides along the top of the photovoltaic component 2 for detection, the bottom of the active end of the cleaning plate 6 abuts against the inner wall of the frame 21 to avoid the photovoltaic component 2 being too far away, thereby ensuring that the photovoltaic component 2 before detection is in the standard transmission position, which is conducive to accurately transmitting the photovoltaic component 2 to the detection position in the detection dark box 1 and connecting it to the power connection block 8.

[0039] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown, the limit rod 10 is unidirectionally connected to the two sides of the cleaning plate 6, that is, when the sliding member 5 slides back along the top of the photovoltaic module 2, as shown in FIG. Figure 7 , Figure 8 As shown, the limit rod 10 abuts against the right side of the limit platform 11 and cannot rotate, so that the limit rod 10 slides along the slope of the limit platform 11, and the sliding member 5 slides along the upper side of the photovoltaic module 2. Figure 1 , Figure 5 As shown, the limit rod 10 moves synchronously with the cleaning plate 6 until it abuts against the left side end of the limit platform 11, and the limit platform 11 pushes the limit rod 10 to rotate unidirectionally so that the limit rod 10 slides along the side end of the limit platform 11 without affecting the movement of the limit rod 10 and the cleaning plate 6.

[0040] In an embodiment of the present invention, Figure 1, Figure 2 , Figure 3 As shown, the intermittent driving device 9 includes a driving wheel 91 rotatably connected to the outer end of the detection dark box 1, the driving wheel 91 is an incomplete gear, and the upper and lower ends of the driving wheel 91 are respectively meshed and connected with driven gears 92, wherein the toothed part and the toothless part of the incomplete gear each occupy a semicircle of the outer circumference of the driving wheel 91, and the driven gears 92 adopt the same specifications, that is, through the existing conventional driving structure such as a motor, a reducer, etc., the driving wheel 91 is driven to rotate continuously, and the driven gears 92 at the upper and lower ends are driven to rotate intermittently in turn, and one end of the driven gear 92 is connected to a connecting shaft 93, and the connecting shaft 93 It is rotatably connected to the side wall of the detection dark box 1, and one end of the connecting shaft 93 at the lower end is inserted into the detection dark box 1 and is connected to the roller 31 of the conveyor belt 3, and the one end of the connecting shaft 93 at the upper end is inserted into the detection dark box 1 and is connected to an internal gear 94, and is meshed with the sliding member 5 through the internal gear 94. Specifically, the gear circumference of the internal gear 94 is smaller than the gear circumference of the roller 31, that is, the distance of the intermittent movement of the sliding member 5 is equivalent to the length of the photovoltaic component 2, and the distance of the intermittent transmission of the conveyor belt 3 is equivalent to the length of the photovoltaic component 2 plus the spacing between adjacent photovoltaic components 2.

[0041] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the sliding member 5 includes a sliding bar slidably connected to the inner walls on both sides of the detection dark box 1. Specifically, the sliding bar is provided with a rack meshing with the internal gear 94 for transmitting the sliding movement of the sliding bar. The inner wall of the detection dark box 1 may be provided with a guide rail or a slide groove for guiding the sliding sliding bar.

[0042] Optionally, a positioning block 12 can be connected to the end of the sliding member 5 that penetrates into the detection dark box 1, and a positioning bar 13 is provided at the transmission entrance end of the detection dark box 1 near the conveyor belt 3. A reset elastic member 121 is connected between the positioning block 12 and the inner wall of the detection dark box 1. The reset elastic member 121 adopts existing conventional reset springs, elastic ropes and other components, which are used to pull the sliding member 5 to slide back in the opposite direction until the visual inspection head 7 slides back to its initial position. The reset elastic member 121 is still in a tensioned state, and the side end of the positioning block 12 abuts against the positioning bar 13 to achieve reset positioning. More preferably, a magnetic member is also provided on the positioning bar 13 for magnetically adsorbing the positioning block 12 for more efficient and stable reset positioning. Alternatively, the reset of the sliding member 5 can also adopt a telescopic push rod or other similar external drive return component to push the sliding member 5 to slide back in the opposite direction immediately after the inspection.

[0043] As another embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a shading member 14 is connected in the middle of the slide bar, and the length direction of the shading member 14 is parallel to the width direction of the photovoltaic module 2. Specifically, as shown in FIG. Figure 4 As shown, the shading member 14 can adopt a conventional strip-shaped thin rod design, and the visual inspection head 7 can be arranged on both sides of the bottom end of the shading member 14. When the sliding member 5 slides along the top of the photovoltaic component 2 for inspection, the shading member 14 can form a strip-shaped shading shadow on the photovoltaic component 2, and the visual inspection head 7 can detect towards both sides of the shadow. At the same time, a photothermal inspection head 15 is arranged in the inspection darkroom 1. The photothermal inspection head 15 can adopt existing conventional infrared thermal imagers and other temperature measuring equipment to capture the heat source signal on the photovoltaic component 2. Based on the hot spot effect, the photovoltaic component 2 will be treated as a load in its shaded area to consume the energy generated by other illuminated areas, so the shaded area will generate heat. In order to resist the influence of the hot spot effect in the prior art, A plurality of bypass diodes are often connected in parallel on the photovoltaic module 2. When the photovoltaic module 2 is affected by shading, the bypass diode path corresponding to the shaded area is formed. The bypass diode in the path is regarded as a load and consumes energy, thereby playing a protective role. Therefore, the shading member 14 slides along the top of the photovoltaic module 2 along with the sliding member 5, and the photothermal detection head 15 collects the heat source signal on the photovoltaic module 2 at the same time. It is used to detect whether the corresponding bypass diode is started when the photovoltaic module 2 is affected by shading during normal use, as well as the temperature rise on the photovoltaic module 2, the surface state, the output voltage and current state, etc. when the temperature rises on the photovoltaic module 2, so as to judge the ability of the photovoltaic module 2 to withstand the hot spot heating effect.

[0044] Among them, optionally, considering that the conveyor belt 3 itself is relatively light and thin, the photothermal detection head 15 can be arranged at the bottom end of the detection dark box 1, and can also be arranged at the top end of the detection dark box 1.

[0045] The present invention also provides a photovoltaic module defect detection method, comprising the following steps:

[0046] The intermittent driving device 9 drives the conveyor belt 3 to convey and the sliding member 5 to slide in sequence. When the conveyor belt 3 drives the photovoltaic module 2 to be conveyed into the detection dark box 1, the photovoltaic module 2 is located at the detection position in the detection dark box 1 and is connected to the power connection block 8. At this time, the sliding member 5 starts to slide, driving the visual inspection head 7 to slide along the top of the photovoltaic module 2, so as to perform visual inspection on the photovoltaic module 2 and realize comprehensive inspection of the photovoltaic module 2 under normal working conditions.

[0047] After the inspection is completed, the sliding member 5 slides back along the top of the photovoltaic component 2 to reset until the visual inspection head 7 slides back to its initial position and stops. At the same time, the conveyor belt 3 starts to convey until the next photovoltaic component 2 is conveyed into the inspection position in the inspection darkbox 1 for the next round of inspection. At the same time, the cleaning plate 6 connected to the outside of the inspection darkbox 1 is able to scrape and clean the top surface of the photovoltaic component 2 in the forward and reverse directions in turn, and pre-clean the photovoltaic component 2 before inspection.

[0048] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

Claims

1. A photovoltaic module defect detection device, comprising a detection dark box (1), a conveyor belt (3) for conveying photovoltaic modules (2) is provided along the length direction of the detection dark box (1), and a detection light source (4) is provided at the top of the detection dark box (1), characterized in that: Also includes: A sliding member (5) is arranged parallel to the top of the conveyor belt (3); one end of the sliding member (5) penetrates into the detection dark box (1) and is slidably connected to the inner wall of the detection dark box (1); the other end of the sliding member (5) passes out of the detection dark box (1) and is connected to a cleaning plate (6) for scraping and cleaning the top surface of the photovoltaic module (2) on the conveyor belt (3); One end of the sliding member (5) that penetrates into the detection dark box (1) is connected to a visual detection head (7), and the initial position of the visual detection head (7) is located in the detection dark box (1) near the conveying entrance end of the conveyor belt (3); A power connection block (8) is arranged in the detection dark box (1) at one end close to the conveyor belt (3); An intermittent drive device (9) is arranged on the outer end of the detection dark box (1). One end of the intermittent drive device (9) is connected to the conveyor belt (3) for transmission, and the other end is connected to the sliding member (5) for transmission. The intermittent drive device (9) is used to sequentially drive the conveyor belt (3) for transmission and the sliding member (5) for sliding. When the conveyor belt (3) drives the photovoltaic module (2) to be transported into the detection dark box (1) for an interval, the photovoltaic module (2) is connected to the power connection block (8). At the same time, the sliding member (5) slides along the top of the photovoltaic module (2) for visual inspection of the photovoltaic module (2). When the conveyor belt (3) drives the next photovoltaic module (2) to be transported into the detection dark box (1), the sliding member (5) slides in the reverse direction along the top of the photovoltaic module (2) until the visual inspection head (7) slides back to its initial position.

2. A photovoltaic module defect detection device according to claim 1, characterized in that: The bottom end of the cleaning plate (6) is provided with flexible bristles (61) for scraping and cleaning the top surface of the photovoltaic module (2).

3. A photovoltaic module defect detection device according to claim 2, characterized in that: The photovoltaic assembly (2) comprises a battery assembly and a frame (21) encapsulated on the outside of the battery assembly. The bottom of the cleaning plate (6) is designed as a telescopic structure, and both sides of the movable end of the bottom of the cleaning plate (6) are connected to limit rods (10). The flexible bristles (61) are arranged on the bottom of the movable end of the cleaning plate (6). Limit platforms (11) are vertically arranged on both sides of the conveyor belt (3) outside the detection dark box (1). The top of the limit platform (11) is designed as a slope facing the detection dark box (1). When the sliding member (5) slides along the top of the photovoltaic assembly (2) for detection, the flexible bristles (61) abut against and scrape the detection dark box (1). 1) until the bottom of the movable end of the cleaning plate (6) abuts against the inner wall of the frame (21), and when the sliding member (5) slides back along the top of the photovoltaic module (2), the limit rod (10) slides along the slope of the limit platform (11), driving the movable end of the cleaning plate (6) to be lifted upward, so that the bottom of the cleaning plate (6) passes over the frame (21) and moves to the top surface of the next photovoltaic module (2), until the visual inspection head (7) slides back to its initial position, and the bottom of the movable end of the cleaning plate (6) abuts against the inner side of the frame (21) of the next photovoltaic module (2).

4. A photovoltaic module defect detection device according to claim 3, characterized in that: The limit rod (10) is unidirectionally rotatably connected to both sides of the cleaning plate (6). When the sliding member (5) is detected by sliding along the top of the photovoltaic assembly (2), the limit rod (10) moves synchronously with the cleaning plate (6) until it abuts against the side end of the limit platform (11). The limit platform (11) pushes the limit rod (10) to rotate unidirectionally, so that the limit rod (10) slides along the side end of the limit platform (11).

5. A photovoltaic module defect detection device according to claim 1, characterized in that: The intermittent driving device (9) comprises a driving wheel (91) rotatably connected to the outer end of the detection dark box (1), the driving wheel (91) is an incomplete gear, and the upper and lower ends of the driving wheel (91) are respectively meshed with driven gears (92), one end of the driven gear (92) is connected to a connecting shaft (93), and the connecting shaft (93) is rotatably connected to the side wall of the detection dark box (1), one end of the connecting shaft (93) at the lower end that penetrates into the detection dark box (1) is connected to the roller (31) of the conveyor belt (3), and one end of the connecting shaft (93) at the upper end that penetrates into the detection dark box (1) is connected to an internal gear (94), and is meshed with the sliding member (5) through the internal gear (94).

6. A photovoltaic module defect detection device according to claim 1, characterized in that: The sliding member (5) comprises sliding strips slidably connected to the inner side walls on both sides of the detection dark box (1).

7. A photovoltaic module defect detection device according to claim 6, characterized in that: A shading member (14) is connected in the middle of the sliding bar, the length direction of the shading member (14) is parallel to the width direction of the photovoltaic assembly (2), and a photothermal detection head (15) is arranged in the detection dark box (1).

8. A photovoltaic module defect detection method, the method using the photovoltaic module defect detection device according to any one of claims 1 to 7 for detection, characterized in that: The following steps are involved: The intermittent driving device (9) sequentially drives the conveyor belt (3) to move and the sliding member (5) to move. When the conveyor belt (3) drives the photovoltaic module (2) to be transported into the detection dark box (1), the photovoltaic module (2) is located at the detection position in the detection dark box (1) and is connected to the power connection block (8). At this time, the sliding member (5) starts to move, driving the visual inspection head (7) to slide along the top of the photovoltaic module (2) to perform visual inspection on the photovoltaic module (2); After the inspection is completed, the sliding member (5) slides back along the top of the photovoltaic module (2) to reset until the visual inspection head (7) slides back to its initial position and stops. At the same time, the conveyor belt (3) starts to convey until the next photovoltaic module (2) is conveyed to the inspection position in the inspection dark box (1) to carry out the next round of inspection. At the same time, the cleaning plate (6) connected to the outside of the inspection dark box (1) can scrape and clean the top surface of the photovoltaic module (2) in the forward and reverse directions in turn, so as to perform a pre-cleaning operation on the photovoltaic module (2) before inspection.

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