Method for detecting light transmittance of coated photovoltaic glass

Abstract

The invention relates to the field of light transmittance detection, and discloses a coated photovoltaic glass light transmittance detection method, which comprises the following steps: S1, randomly selecting a piece of coated photovoltaic glass; s2, randomly selecting three positions on one piece of coated photovoltaic glass, and cutting three to-be-detected samples with the same size through cutting equipment; s3, cleaning the three samples to be detected; and S4, respectively carrying out light transmittance detection. According to the film-coated photovoltaic glass light transmittance detection method provided by the invention, through a combination mode of preliminary cutting of the cutting ring and cutting of the laser head along the gap, a laser heat affected zone is limited by the gap, burning and edge curling of a coating film are avoided, the original state of the film-coated photovoltaic glass is reserved, an electrostatic dust collection roller of the rolling cleaning mechanism adsorbs scraps, and the light transmittance of the film-coated photovoltaic glass is detected. The inclined scraper and the collecting shell are matched for automatic cleaning, the detection accuracy is guaranteed, the driving motor and the linear actuator achieve automatic operation and adjustment of the cutting ring, manual intervention is reduced, the detection efficiency is improved, and the requirement for batch detection is met.

Description

Technical Field

[0001] This invention relates to the field of transmittance testing technology, and more specifically, to a method for testing the transmittance of coated photovoltaic glass. Background Technology

[0002] The core of photovoltaic glass coating is to improve light utilization to increase module power generation efficiency, and enhance durability to extend lifespan. Ordinary glass reflects 4%-8% of sunlight. The coating layer reduces reflectivity through optical interference, allowing more light to be absorbed by the cells. Some coatings can form a protective layer to isolate moisture, dust, etc., preventing glass aging and cell corrosion. A few functional coatings can also optimize spectral response. Transmittance testing is crucial for ensuring power generation efficiency, as high transmittance means more photons are absorbed. It also verifies the coating process, controls production quality, ensures consistent product performance, and avoids affecting the overall power generation effect of the power station.

[0003] Currently, when testing the transmittance of coated photovoltaic glass, it is usually necessary to first cut it into multiple samples to be tested using a cutting device. However, during the laser cutting process, because the photovoltaic glass surface has a coating layer and laser cutting mainly relies on the thermal effect, a high temperature is generated and a heat-affected zone is formed. This area is prone to burning of the coating layer or edge curling, which in turn damages the original state of the coated photovoltaic glass at the cut point and ultimately affects the accuracy of the transmittance test results. Summary of the Invention

[0004] This invention provides a method for detecting the transmittance of coated photovoltaic glass, solving the technical problem in related technologies where coating winding affects the accuracy of detection results.

[0005] This invention provides a method for detecting the transmittance of coated photovoltaic glass, comprising the following steps: S1. Randomly select a piece of coated photovoltaic glass; S2. Select three arbitrary locations on a piece of coated photovoltaic glass and cut out three samples of the same size using a cutting device; S3. Clean the three samples to be tested; S4. Perform transmittance tests separately.

[0006] As a further optimization of the present invention, the cutting device includes: An annular structure used to cover coated photovoltaic glass; The outer circumference of the annular body is equipped with a ring cutter for preliminary cutting of the coating; After the ring cutter makes a slit, it forms a physical barrier. Then, the laser head cuts the coated photovoltaic glass along the slit. It is also equipped with a rolling cleaning mechanism that works in conjunction with the laser head to roll and clean the coated area of ​​the laser-cut seam, so as to make the cut edge flat and free of residual film and debris.

[0007] As a further optimization of the present invention, a drive motor is installed at the inner axis of the annular body, and the drive motor is connected to the ring cutter through a drive frame.

[0008] As a further optimization of the present invention, a flexible ring is installed at the bottom of the ring body, and the drive frame is slidably connected to the ring body so that when the drive frame drives the ring cutter to press down, it provides movement space, and the laser head is assembled on the drive frame.

[0009] As a further optimization of the present invention, a linear actuator is connected to the drive frame, and the drive end of the linear actuator rotates and extends into the interior of the drive frame.

[0010] As a further optimization of the present invention, the rolling cleaning mechanism includes an electrostatic dust removal roller, which is rotatably connected to the ring cutter.

[0011] As a further optimization of the present invention, a self-cleaning component is provided on one side of the electrostatic dust removal roller.

[0012] As a further optimization of the present invention, the self-cleaning component includes a collection shell and a scraper. The collection shell is installed on the outer periphery of the ring cutter, and a feed inlet is provided on the collection shell. The scraper is installed at the feed inlet and guides the scraped debris into the scraper.

[0013] As a further optimization of the present invention, the scraper is inclined toward the feed inlet.

[0014] As a further optimization of the present invention, an annular tube is formed outward from the bottom of the outer periphery of the annular body. The annular tube is rotatably sleeved with the ring cutter, and the interior of the annular tube contains a coolant for cooling the ring cutter.

[0015] As a further optimization of the present invention, a magnetic block one is installed on the top of the ring cutter, and a magnetic block two is slidably arranged inside the annular tube and magnetically attracted to the magnetic block one. A flow-dispersing block is installed on the magnetic block two, and a flow channel is opened on the flow-dispersing block. The discharge end of the flow channel discharges liquid in a cross manner to turbulence.

[0016] The beneficial effects of this invention are as follows: 1. The method for detecting the transmittance of coated photovoltaic glass described in this invention uses a combination of preliminary cutting with a ring cutter and cutting along the slit with a laser head. The slit cut by the ring cutter forms a physical barrier, limiting the diffusion of the heat-affected zone generated by laser cutting to the surrounding coated area. This avoids the problems of coating layer burning and edge curling caused by the thermal effect of traditional laser cutting, and preserves the original state of the coated photovoltaic glass at the cut to the greatest extent. At the same time, the electrostatic dust removal roller of the rolling cleaning mechanism can accurately adsorb residual film debris after laser cutting. Combined with the inclined scraper and collection shell, the debris is automatically cleaned, avoiding the interference of impurities with the transmittance detection. From the aspects of cutting quality and sample cleanliness, it is ensured that the test results can truly reflect the actual transmittance performance of the coated photovoltaic glass.

[0017] 2. The method for detecting the transmittance of coated photovoltaic glass described in this invention uses a drive motor to automatically rotate a ring cutter via a drive frame. A linear actuator can control the depth and speed of the ring cutter's downward pressure, eliminating the need for manual adjustment of cutting parameters. Simultaneously, an electrostatic dust removal roller rotates synchronously with the ring cutter to achieve automatic cleaning. The self-cleaning component can automatically collect debris, reducing manual intervention, shortening the time for sample cutting and pretreatment, improving the efficiency of the overall testing process, and better meeting the batch testing needs in large-scale production.

[0018] 3. The method for detecting the transmittance of coated photovoltaic glass described in this invention involves a collection shell installed on the outer periphery of a ring cutter. During the continuous rotation and cutting of the coating layer, the ring cutter generates heat due to mechanical friction. If this heat accumulates, it can easily lead to an increase in the temperature of the ring cutter's cutting edge and accelerated wear. The collection shell, being in close contact with the outer periphery of the ring cutter, conducts the heat generated by the ring cutter to itself and then dissipates heat through the surface area of ​​the shell, reducing the operating temperature of the ring cutter, delaying edge wear, ensuring the stability of the ring cutter's cutting accuracy, and preventing the high-temperature ring cutter from causing additional thermal effects on the glass coating layer. This further protects the original state of the sample to be tested and indirectly provides support for the accuracy of transmittance detection.

[0019] 4. The method for detecting the transmittance of coated photovoltaic glass described in this invention uses a flexible ring at the bottom of the ring body to buffer the impact force when the ring cutter is pressed down, preventing the glass from cracking or being scratched due to excessive local pressure. The electrostatic dust removal roller adopts a rolling contact cleaning method, which will not cause friction damage to the coating layer and ensure the integrity of the sample. In addition, the presence of the self-cleaning component can prevent debris from accumulating on the surface of the electrostatic dust removal roller, which would reduce its adsorption capacity, extend the service life of equipment components, reduce equipment maintenance costs, and achieve dual protection of the sample and equipment during the detection process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the cutting equipment in this invention.

[0021] Figure 2 This is a schematic diagram of the structure of the ring-shaped body of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of the collecting shell in this invention.

[0023] Figure 4 This is a side sectional view of the ring cutter in this invention.

[0024] Figure 5 This is a top-view cross-sectional structural diagram of the turbulence block in this invention.

[0025] In the picture: 1. Ring body; 2. Ring blade; 3. Laser head; 4. Rolling cleaning mechanism; 41. Electrostatic dust removal roller; 42. Collection shell; 43. Scraper; 5. Drive motor; 6. Drive frame; 7. Flexible ring body; 8. Linear actuator; 9. Suspension; 10. Ring tube; 11. Magnetic block one; 12. Magnetic block two; 13. Turbulence block; 131. Flow channel. Detailed Implementation

[0026] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0027] Example 1 like Figures 1 to 5 As shown in the embodiment of the present invention, a method for detecting the transmittance of coated photovoltaic glass includes the following steps: S1. Randomly select a piece of coated photovoltaic glass; S2. Select three arbitrary locations on a piece of coated photovoltaic glass and cut out three samples of the same size using a cutting device; S3. Clean the three samples to be tested; S4. Perform transmittance tests separately.

[0028] Example 2 Based on Embodiment 1, the cutting device includes: An annular structure 1 covering the coated photovoltaic glass; A ring cutter 2 is rotatably provided on the outer periphery of the ring body 1 for preliminary cutting of the coating; After the ring cutter 2 cuts out a slit, it forms a physical barrier. Then, the laser head 3 cuts the coated photovoltaic glass along the slit. It is also equipped with a rolling cleaning mechanism 4 that works in conjunction with the laser head 3 to roll and clean the coated area of ​​the laser-cut seam, so as to make the cut edge flat and free of residual film and debris.

[0029] The annular body 1 covers the coated photovoltaic glass, which can, to some extent, prevent debris generated during the cutting process from spreading inward and reduce contamination of the cut sample. The ring cutter 2 is rotated around the outer circumference of the annular body 1. Its main function is to perform preliminary cutting of the coating. During rotation, the ring cutter 2 contacts the surface of the coated photovoltaic glass and applies pressure, using mechanical cutting force to cut a slit in the coating layer. The formation of this slit can, on the one hand, disrupt the integrity of the coating layer in advance, providing a guiding path for subsequent laser cutting. On the other hand, the cut slit and the ring cutter 2 form a physical barrier, which can limit the diffusion of the heat-affected zone generated during laser cutting to the surrounding coating area, avoiding large-area thermal effects on the coating layer, reducing the occurrence of coating layer burn-out or edge curling, thus ensuring that the state of the coating layer at the edge of the cut sample is closer to the original state, reducing interference with subsequent transmittance detection results.

[0030] The laser head 3 cuts the coated photovoltaic glass along the slit cut by the ring cutter 2. Since the slit has damaged the coating layer and formed a physical guide, the laser emitted by the laser head 3 can be concentrated on the glass body, reducing the direct and extensive contact between the laser and the intact coating layer. This reduces the impact of the heat effect generated by laser cutting on the coating layer. At the same time, cutting along the slit ensures the accuracy of the cutting path, avoids the laser cutting from deviating from the predetermined position, and ensures that the size of the cut sample to be tested is accurate and meets the testing requirements. This further reduces the impact of improper cutting position or heat damage to the coating layer on the accuracy of the test results.

[0031] The rolling cleaning mechanism 4 works in conjunction with the laser head 3 to roll and clean the gap coating area after laser cutting. The rolling action can smooth out the coating layer or glass edge that may be slightly raised after cutting, reduce light scattering caused by uneven edges, and ensure the stability of the sample edge state.

[0032] A drive motor 5 is installed at the inner axis of the annular body 1. The drive motor 5 is connected to the inner circumference of the annular body 1 through a mounting bracket. The drive motor 5 is connected to the ring cutter 2 through a drive bracket 6.

[0033] The drive motor 5 is installed on the inner axis of the ring body 1. Its output shaft is connected to the drive frame 6, which in turn is connected to the ring cutter 2. When the drive motor 5 starts, its output shaft generates rotational power, which is transmitted to the ring cutter 2 through the drive frame 6, causing the ring cutter 2 to rotate around the outer circumference of the ring body 1.

[0034] A flexible ring 7 is installed at the bottom of the ring body 1. The drive frame 6 is slidably connected to the ring body 1 so that when the drive frame 6 drives the ring cutter 2 to press down, it provides movement space. The laser head 3 is mounted on the drive frame 6. The drive frame 6 is connected to a linear actuator 8, which is a hydraulic cylinder, a pneumatic cylinder, or an electric push rod. The linear actuator 8 is mounted on the suspension 9 to suspend the entire cutting equipment. The drive end of the linear actuator 8 rotates and extends into the interior of the drive frame 6 so that when the linear actuator 8 drives the ring body 1 to move in the vertical direction, it does not affect the drive motor 5 driving the ring cutter 2 to rotate.

[0035] The flexible ring 7 is a rubber flexible ring installed at the bottom of the ring body 1. It has a certain elasticity and deformation capacity. When the linear actuator 8 drives the drive frame 6 and the ring cutter 2 to press down, the drive frame 6 can move downward along the axis of the ring body 1 because it is slidably connected to the ring body 1. At this time, the flexible ring 7 will deform under the action of the drive frame 6 and the ring body 1, providing sufficient movement space for the drive frame 6 to move downward. At the same time, the flexible ring 7 is in contact with the surface of the coated photovoltaic glass, which can buffer the impact force on the glass surface when the ring cutter 2 is pressed down to a certain extent, preventing the glass from breaking due to excessive pressure. In addition, the flexible ring 7 can also enhance the sealing between the ring body 1 and the glass, reduce the entry of debris into the sample forming area from the contact gap between the two during the cutting process, further ensure the cleanliness of the cutting environment, improve the cutting quality, and provide a guarantee for the accuracy of subsequent test results.

[0036] Specifically, the rolling cleaning mechanism 4 includes an electrostatic dust removal roller 41, which is rotatably connected to the ring cutter 2.

[0037] The electrostatic dust removal roller 41 in the rolling cleaning mechanism 4 is rotatably connected to the ring cutter 2. When the ring cutter 2 rotates, it drives the electrostatic dust removal roller 41 to rotate synchronously. After laser cutting, the electrostatic dust removal roller 41 contacts the coated area of ​​the cut seam during rotation. Since the electrostatic dust removal roller 41 is electrostatic, it can adsorb the residual coating debris, glass fragments and other tiny impurities after laser cutting onto its surface using the principle of electrostatic adsorption. This synchronous rotation with the ring cutter 2 ensures that the electrostatic dust removal roller 41 always follows the cutting progress and cleans the cut area in a timely manner, avoiding the accumulation of impurities in the seam. At the same time, the rolling contact method will not cause scratches or squeezing damage to the glass surface and coating layer, ensuring the integrity of the sample surface. Compared with traditional brush cleaning methods, the electrostatic adsorption cleaning method can more effectively remove tiny impurities and is less likely to generate secondary dust. The cleaning effect is more thorough, ensuring that there are no residual film debris on the cut edge, providing a clean sample surface for subsequent transmittance testing, reducing the interference of impurities on the test results, and ensuring the accuracy of the test results.

[0038] Furthermore, a self-cleaning component is provided on one side of the electrostatic dust removal roller 41.

[0039] The self-cleaning component includes a collection shell 42 and a scraper 43. The collection shell 42 is installed on the outer periphery of the ring cutter 2 and has a feed inlet. The scraper 43 is installed at the feed inlet and guides the scraped debris into the scraper 43.

[0040] When the electrostatic precipitator roller 41 rotates, the debris adsorbed on its surface will reach the position where it contacts the scraper 43. The scraper 43 contacts the surface of the electrostatic precipitator roller 41. During the continuous rotation of the electrostatic precipitator roller 41, the scraper 43 will generate a scraping force on the debris on its surface, scraping the debris off the surface of the electrostatic precipitator roller 41. Since the scraper 43 is set at the feed inlet of the collection shell 42, it can guide the scraped debris into the collection shell 42. The scraped debris will directly enter the inside of the collection shell 42 for collection, avoiding debris falling onto the sample surface or cutting area and causing secondary pollution. The collection shell 42 can centrally store the debris, which is convenient for subsequent unified cleaning and reduces pollution to the surrounding environment. This self-cleaning structure, through the mechanical scraping of the scraper 43 and the centralized collection of the collection shell 42, achieves effective cleaning and recycling of debris on the surface of the electrostatic precipitator roller 41, ensuring that the electrostatic precipitator roller 41 always maintains good adsorption capacity and continuously provides a clean surface for the cut sample. It also improves the automation level and maintenance convenience of the equipment.

[0041] The collection shell 42 is installed on the outer periphery of the ring cutter 2. In addition to collecting debris, it also has a heat dissipation effect on the ring cutter 2: During the continuous rotation of the ring cutter 2 to cut the coating layer, heat is generated due to mechanical friction. If the heat accumulates, it will easily lead to an increase in the temperature of the cutting edge of the ring cutter 2 and accelerated wear. The collection shell 42 is attached to the outer periphery of the ring cutter 2 and can be made of metal (or thermally conductive material) to conduct the heat generated by the ring cutter 2 to itself, and then dissipate heat through the surface area of ​​the shell, thereby reducing the working temperature of the ring cutter 2, delaying the wear of the cutting edge, ensuring the stability of the cutting accuracy of the ring cutter 2, and avoiding the additional thermal impact of the high-temperature ring cutter 2 on the glass coating layer. This further protects the original state of the sample to be tested and indirectly provides support for the accuracy of transmittance detection.

[0042] Furthermore, the scraper 43 is inclined toward the feed inlet.

[0043] The scraper 43 is inclined toward the feed inlet. When the scraper 43 scrapes off the debris from the surface of the electrostatic dust removal roller 41, the scraped debris will automatically slide along the inclined surface of the scraper 43 toward the feed inlet of the collection shell 42 under the action of gravity, and then enter the interior of the collection shell 42. Compared with the horizontally arranged scraper 43, this inclined setting can more effectively guide the movement direction of the debris, avoid the accumulation of debris on the surface of the scraper 43, ensure that the debris can smoothly enter the collection shell 42, and reduce the situation of debris residue on the scraper 43. Meanwhile, the inclined setting can reduce the resistance when the scraper 43 contacts the electrostatic dust removal roller 41, making the rotation of the electrostatic dust removal roller 41 smoother. In addition, when scraping debris, the inclined scraper 43 can better fit the curved surface of the electrostatic dust removal roller 41, improve the thoroughness of debris scraping, further ensure the cleanliness of the surface of the electrostatic dust removal roller 41, ensure its adsorption capacity, and thus continuously and effectively clean the residual film debris after cutting, providing good sample conditions for subsequent light transmittance testing and ensuring the accuracy of the test results.

[0044] An annular tube 10 is formed outward from the bottom of the outer periphery of the annular body 1. The annular tube 10 is rotatably connected to the ring cutter 2. The interior of the annular tube 10 contains coolant to cool the ring cutter 2.

[0045] The annular tube 10 is filled with coolant to assist in cooling the ring cutter 2.

[0046] A magnetic block 11 is installed on the top of the ring cutter 2. A magnetic block 12 is slidably arranged inside the annular tube 10 and magnetically attracted to the magnetic block 11. A turbulence block 13 is installed on the magnetic block 12. A flow channel 131 is opened on the turbulence block 13, and the liquid is discharged at the discharge end of the flow channel 131 in a cross manner to turbulence the flow.

[0047] As the ring cutter 2 rotates, the magnetic block 11 and the magnetic block 2 12 move around the inside of the annular tube 10 to turbulent the coolant, thereby increasing the uniformity of the coolant temperature and improving the cooling effect.

[0048] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A method for detecting the transmittance of coated photovoltaic glass, characterized in that, Includes the following steps: S1. Randomly select a piece of coated photovoltaic glass; S2. Select three arbitrary locations on a piece of coated photovoltaic glass and cut out three samples of the same size using a cutting device; S3. Clean the three samples to be tested; S4. Perform transmittance tests separately.

2. The method for detecting the transmittance of coated photovoltaic glass according to claim 1, characterized in that: The cutting equipment includes: An annular structure (1) covering coated photovoltaic glass. The outer circumference of the annular body (1) is provided with a ring cutter (2) for preliminary cutting of the coating; After the ring cutter (2) cuts out a slit, the laser head (3) cuts the coated photovoltaic glass along the slit; It is also equipped with a rolling cleaning mechanism (4) that works in conjunction with the laser head (3) to roll and clean the gap coating area after laser cutting.

3. The method for detecting the transmittance of coated photovoltaic glass according to claim 2, characterized in that: A drive motor (5) is installed at the inner axis of the ring body (1), and the drive motor (5) is connected to the ring cutter (2) through the drive frame (6).

4. The method for detecting the transmittance of coated photovoltaic glass according to claim 3, characterized in that: A flexible ring (7) is installed at the bottom of the ring body (1), and the drive frame (6) is slidably connected to the ring body (1). The laser head (3) is mounted on the drive frame (6).

5. The method for detecting the transmittance of coated photovoltaic glass according to claim 4, characterized in that: The drive frame (6) is connected to a linear actuator (8), and the drive end of the linear actuator (8) rotates and extends into the interior of the drive frame (6).

6. The method for detecting the transmittance of coated photovoltaic glass according to claim 2, characterized in that: The rolling cleaning mechanism (4) includes an electrostatic dust removal roller (41), which is rotatably connected to the ring cutter (2).

7. The method for detecting the transmittance of coated photovoltaic glass according to claim 6, characterized in that: The electrostatic dust removal roller (41) has a self-cleaning component on one side.

8. The method for detecting the transmittance of coated photovoltaic glass according to claim 7, characterized in that: The self-cleaning component includes a collection shell (42) and a scraper (43). The collection shell (42) is installed on the outer periphery of the ring cutter (2), and a feed inlet is provided on the collection shell (42). The scraper (43) is installed at the feed inlet and guides the scraped debris into the scraper (43).

9. The method for detecting the transmittance of coated photovoltaic glass according to claim 8, characterized in that: The bottom of the annular body (1) forms an annular tube (10) that rotates outward. The annular tube (10) is rotatably connected to the ring cutter (2). The interior of the annular tube (10) contains coolant to cool the ring cutter (2).

10. The method for detecting the transmittance of coated photovoltaic glass according to claim 9, characterized in that: A magnetic block 1 (11) is installed on the top of the ring cutter (2). A magnetic block 2 (12) is slidably arranged inside the annular tube (10) and magnetically attracted to the magnetic block 1 (11). A turbulence block (13) is installed on the magnetic block 2 (12). A flow channel (131) is opened on the turbulence block (13), and the liquid is discharged at the discharge end of the flow channel (131) in a cross manner to turbulence the flow.

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