A reflectivity detection device for crystalline silicon cells after etching

Abstract

The present invention discloses a reflectivity detection device for crystalline silicon cells after etching, including a detection machine, a detection frame and a transfer structure. A conveyor belt is embedded in the top of the detection machine, the detection frame is arranged on the top of the detection machine, a turntable is installed at the bottom of the detection frame, a slide groove is arranged in the turntable, and a lead screw is installed in the slide groove, and the lead screw passes through two sliding blocks. The reflectivity detection device for crystalline silicon cells after etching is provided with a second motor, an irradiation lamp and a receiving plate. The irradiation lamp has a certain angle when installed. The light irradiated by the irradiation lamp is irradiated onto the receiving plate after being reflected by the crystalline silicon cell. The light sensor on the receiving plate sends the data to the control panel, and a set of detection data is collected. The second motor drives the lead screw to rotate, and then drives the lateral movement of the sliding block, so that the irradiation lamp and the receiving plate move laterally as a whole, and the detection is performed again, so as to achieve multiple detection effects and improve the detection accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of crystalline silicon cell detection, and in particular to a device for detecting reflectivity of a crystalline silicon cell after etching. Background Art

[0002] Texturing is the first process in manufacturing crystalline silicon cells, also known as "surface texturing". The effective velvet structure allows the incident light to be reflected and refracted multiple times on the surface of the silicon wafer, increasing the absorption of light, reducing the reflectivity, and helping to improve the performance of the battery. The silicon wafer processed through multiple processes such as slicing, grinding, chamfering, and polishing has adsorbed various impurities on its surface, such as particles, metal particles, silicon powder dust and organic impurities. It needs to be cleaned before diffusion to eliminate various pollutants, and the cleanliness of the cleaning directly affects the yield and reliability of the battery cell. Cleaning mainly uses chemical liquids such as NaOH, HF, and HCL to corrode the silicon wafer to complete the following processes: remove the mechanical damage layer on the surface of the silicon wafer, treat the surface of the silicon wafer with a concave and convex surface (pyramid velvet), and remove surface sodium silicate, oxides, oil stains, and metal ion impurities.

[0003] However, reflectivity detection equipment is rarely designed in the existing crystalline silicon cell production structure, which makes it difficult to control the reflectivity of the finished crystalline silicon cells, thereby affecting the overall product quality. Therefore, it is necessary to design a reflectivity detection device to detect the light reflectivity of the cell to prevent products with low electricity conversion efficiency from entering the market. Summary of the invention

[0004] The purpose of the present invention is to provide a reflectivity detection device for crystalline silicon cells after etching, so as to solve the problem raised in the above background technology that reflectivity detection equipment is rarely designed in the existing crystalline silicon cell production structure, making it difficult to control the reflectivity of the finished crystalline silicon cells, thereby affecting the overall product quality.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for detecting the reflectivity of a crystalline silicon cell after etching, comprising a detection platform, a detection frame and a transfer structure,

[0006] The detection machine comprises a conveyor belt, a proximity sensor, a control panel and universal wheels. The conveyor belt is embedded in the top of the detection machine, a proximity sensor is installed on the side wall of the conveyor belt, a control panel is installed on one side of the detection machine, and a plurality of universal wheels are arranged at the bottom of the detection machine;

[0007] The detection frame includes a first motor, a turntable, a lead screw, a sliding block, a second motor, an irradiation lamp, a receiving plate, an annular groove, a connecting ring and a roller. The detection frame is arranged on the top of the detection machine platform. The first motor is installed on the top of the detection frame, and a turntable is installed on the bottom of the detection frame. A slide groove is provided in the turntable, and a lead screw is installed in the slide groove. The lead screw passes through two sliding blocks.

[0008] Preferably, an irradiation lamp and a receiving plate are respectively installed at the bottom of the two sliding blocks, a light sensor is provided in the receiving plate, the light outlet of the irradiation lamp is aligned with the center of the conveyor belt, and the positions of the receiving plate and the irradiation lamp are mirrored with the center of the conveyor belt as the axis.

[0009] By adopting the above technical solution, it is convenient to generate light through the irradiation lamp, and then detect the intensity of the reflected light through the light sensor in the receiving plate to determine the reflectivity.

[0010] Preferably, a second motor is provided on the side of the turntable, and the output shaft of the second motor is connected to the lead screw, and the output shaft of the first motor is connected to the turntable.

[0011] By adopting the above technical solution, it is convenient to drive the rotation of the lead screw by the second motor.

[0012] Preferably, a connecting ring is installed on the top of the turntable, an annular groove with an inverted "convex" cross-section is opened on the bottom of the detection frame, the top of the connecting ring is inserted into the annular groove, and rollers are installed on both sides of the connecting ring.

[0013] By adopting the above technical solution, it is convenient to support the turntable through the rollers of the top ring.

[0014] Preferably, the conveyor belt of the detection machine is connected to the conveyor line of the crystalline silicon battery.

[0015] By adopting the above technical solution, it is convenient to drive the movement of the crystalline silicon battery through the conveyor belt.

[0016] Preferably, the transfer structure includes a column, a cross bar, a cylinder and an electric suction cup. The transfer structure is arranged on one side of the top of the detection machine. A cross bar is installed on the column of the transfer structure. A cylinder is provided at the bottom of the other end of the cross bar, and an electric suction cup is installed on the output shaft of the cylinder.

[0017] By adopting the above technical solution, it is convenient to drive the movement of the crystalline silicon battery after the crystalline silicon battery on the conveyor belt is adsorbed by the electric suction cup.

[0018] Preferably, a third motor is provided inside the detection machine at the bottom of the column, and the output shaft of the third motor is connected to the column.

[0019] By adopting the above technical solution, it is convenient to drive the rotation of the column through the third motor, thereby moving the crystalline silicon battery to a specified position.

[0020] Preferably, a finished product box is provided at one end of the detection machine, a defective product box is provided at one side of the detection machine, and bases are provided at the bottoms of the finished product box and the defective product box.

[0021] By adopting the above technical solution, it is convenient to classify and store crystalline silicon cells according to their reflectivity through finished product boxes and defective boxes.

[0022] Preferably, the control panel is electrically connected to the conveyor belt, the proximity sensor, the first motor, the second motor, the irradiation lamp, the electric suction cup, the third motor and the light sensor.

[0023] By adopting the above technical solution, the integrated control of the electrical components in the device is facilitated.

[0024] Compared with the prior art, the invention has the following beneficial effects: the reflectivity detection device for crystalline silicon cells after etching is

[0025] (1) A second motor, an irradiation lamp and a receiving plate are provided. The irradiation lamp is installed at a certain angle. The light irradiated by the irradiation lamp is reflected by the crystalline silicon cell and then irradiated onto the receiving plate. The light sensor on the receiving plate sends data to the control panel, and a set of detection data is collected. The second motor drives the lead screw to rotate, and then drives the sliding block to move horizontally, so that the irradiation lamp and the receiving plate move horizontally as a whole, and detection is performed again, so as to achieve multiple detection effects and improve the detection accuracy;

[0026] (2) A first motor and a turntable are provided, the first motor drives the turntable to rotate, and then drives the irradiation lamp and the receiving plate to rotate, and adjusts the detection direction to achieve the effect of detecting multiple positions on the crystalline silicon cell, further improving the detection accuracy of the reflectivity;

[0027] (3) An annular groove, a connecting ring and a roller are provided. When the turntable rotates, the connecting ring in the annular groove starts to rotate, and the roller is used to reduce the friction during rotation. At the same time, the roller plays an auxiliary supporting effect on the turntable, thereby preventing the output shaft of the first motor from being subjected to excessive pressure, which results in a reduction in the service life of the device;

[0028] (4) A transfer structure, a finished product box and a defective product box are provided. After the test is completed, the conveyor belt drives the crystalline silicon battery to continue to move backward on the test machine. The control panel controls the third motor of the transfer structure to drive the electric suction cup moving cylinder to drive the electric suction cup to contact the surface of the crystalline silicon battery. After the crystalline silicon battery is sucked up, if the reflectivity of the crystalline silicon battery is qualified, it is transferred to the finished product box, and if it is unqualified, it is moved to the defective box, completing the classification process;

[0029] (5) A proximity sensor is provided to detect the crystalline silicon cells conveyed by the conveyor belt. When the crystalline silicon cells are moved to the detection rack and placed down, the proximity sensor sends a signal to the control panel, and the control panel turns off the conveyor belt and performs multiple detections to realize a continuous automated detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the cross-sectional structure of the detection machine and the detection frame of the present invention;

[0031] Figure 2 This is a schematic diagram of the enlarged structure of location A of the present invention;

[0032] Figure 3 This is a schematic diagram of the detection frame, turntable and lead screw in a bottom view of the present invention;

[0033] Figure 4 It is a front view structural schematic diagram of the present invention;

[0034] Figure 5 It is a schematic diagram of the top view structure of the present invention;

[0035] Figure 6 It is the work flow chart of the present invention.

[0036] In the figure: 1. testing machine, 101. conveyor belt, 102. proximity sensor, 103. control panel, 104. universal wheel, 2. testing frame, 201. first motor, 202. turntable, 203. lead screw, 204. sliding block, 205. second motor, 206. irradiation lamp, 207. receiving plate, 208. annular groove, 209. connecting ring, 210. roller, 3. crystalline silicon battery, 4. transfer structure, 401. column, 402. cross bar, 403. cylinder, 404. electric suction cup, 5. finished product box, 6. defective box, 7. base. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-6 The present invention provides a technical solution: a device for detecting the reflectivity of a crystalline silicon cell after etching, according to Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, the detection machine 1 includes a conveyor belt 101, a proximity sensor 102, a control panel 103 and a universal wheel 104. The conveyor belt 101 is embedded in the top of the detection machine 1. The conveyor belt 101 of the detection machine 1 is connected to the conveying line of the crystalline silicon battery 3, which is conducive to moving the crystalline silicon battery 3 through the conveyor belt 101. The detection machine 1 is provided with a proximity sensor 102 on the side wall of the conveyor belt 101, and a control panel 104 is installed on one side of the detection machine 1. A plurality of universal wheels 104 are provided at the bottom of the detection machine 1. The transfer structure 4 includes a column 401, a cross bar 402, a cylinder 403 and an electric suction cup 404. The transfer structure 4 is arranged on one side of the top of the detection machine 1. The cross bar 402 is installed on the column 401 of the transfer structure 4, and a cylinder 403 is provided at the bottom of the other end of the cross bar 402. An electric suction cup 404 is installed on the output shaft of the cylinder 403, which is conducive to driving the lifting of the electric suction cup 404 through the cylinder 403, and then adsorbing the silicon crystal battery 3 through the electric suction cup 404, thereby driving the classification and movement of the crystalline silicon battery 3. A third motor is provided at the bottom of the column 401 inside the detection machine 1, and the output shaft of the third motor is connected to the column 401, which is conducive to driving the rotation of the column 401 through the third motor, so that the crystalline silicon battery 3 can be rotated to other positions after being adsorbed by the electric suction cup 404. A finished product box 5 is provided at one end of the detection machine 1, and a defective box 6 is provided on one side of the detection machine 1. The bottom of the finished product box 5 and the defective box 6 are both provided with a base 7, which is conducive to the classification and storage of qualified and unqualified products through the finished product box 5 and the defective box 6 for subsequent processing.

[0039] according to Figure 1 , Figure 2 and Figure 3As shown, the detection frame 2 includes a first motor 201, a turntable 202, a lead screw 203, a sliding block 204, a second motor 205, an irradiation lamp 206, a receiving plate 207, an annular groove 208, a connecting ring 209 and a roller 210. The detection frame 2 is arranged on the top of the detection machine 1, the first motor 201 is installed on the top of the detection frame 2, the turntable 202 is installed on the bottom of the detection frame 2, the second motor 205 is arranged on the side of the turntable 202, and the output shaft of the second motor 205 is connected to the lead screw 203, and the output shaft of the first motor 201 is connected to the lead screw 203. The shaft is connected to the turntable 202, which is conducive to driving the rotation of the lead screw 203 through the second motor 205, and then driving the lateral movement of the sliding block 204, so that the irradiation lamp 206 and the receiving plate 207 can move laterally to increase the detection range. A connecting ring 209 is installed on the top of the turntable 202, and an annular groove 208 with an inverted "convex" cross-section is opened at the bottom of the detection frame 2. The top of the connecting ring 209 is inserted into the annular groove 208, and rollers 210 are installed on both sides of the connecting ring 209, which is conducive to the connection of the two sides of the connecting ring 209. The roller 210 is used to reduce the friction during rotation. At the same time, the roller 210 has a certain supporting effect on the turntable 202. A slide groove is provided in the turntable 202, and a lead screw 203 is installed in the slide groove. The lead screw 203 passes through two sliding blocks 204. The bottoms of the two sliding blocks 204 are respectively installed with an irradiation lamp 206 and a receiving plate 207. The receiving plate 207 is provided with a light sensor. The light outlet of the irradiation lamp 206 is aligned with the center of the conveyor belt 101. The positions of the receiving plate 207 and the irradiation lamp 206 are mirrored with the center of the conveyor belt 101 as the axis. It is beneficial to emit light through the irradiation lamp 206, which is reflected by the crystalline silicon battery 3 and then irradiated to the receiving plate 207, and the light sensor is used to detect the change in light intensity to determine the reflectivity, and then detect unqualified products. The control panel 103 is electrically connected to the conveyor belt 101, the proximity sensor 102, the first motor 201, the second motor 205, the irradiation lamp 206, the electric suction cup 404, the third motor and the light sensor, which is beneficial to receive and process data through the control panel 103 and start and shut down the components in the control device.

[0040] Working principle: The model of the proximity sensor 102 is ADXL345BCCZ, and the model of the light sensor is RS-GZ-DC-2-65535. When using the reflectivity detection device for crystalline silicon cells after etching, the conveyor belt 101 drives the crystalline silicon cells 3 on the transport line to the detection machine 1, and then moves the crystalline silicon cells 3 to the bottom of the detection rack 2 through the conveyor belt 101. After the proximity sensor 102 detects the crystalline silicon cells 3, the control panel 103 stops the conveyor belt 101. At this time, the irradiation lamp 206 starts to irradiate the crystalline silicon cells 3, and the receiving plate 207 detects the intensity of the reflected light, and then starts the second motor 205. The second motor 205 drives the rotation of the lead screw 203 to realize the lateral movement of the sliding block 204, and detects different lateral positions of the crystalline silicon cells 3. The detection results are sent to the control panel 103, and then the first motor 201 is started to drive the lead screw 203 to rotate, so as to realize the lateral movement of the sliding block 204, and the different lateral positions of the crystalline silicon cells 3 are detected. The detection results are sent to the control panel 103, and then the first motor 201 is started to drive the lead screw 203 to rotate, so as to realize the lateral movement of the sliding block 204, and then the ... The rotating turntable 202 is driven to rotate. When the rotating turntable 202 rotates, the roller 210 plays a certain supporting effect and improves the convenience of moving the rotating turntable 202. The rotating turntable 202 rotates to realize the irradiation lamp 206 and the receiving plate 207 to detect various positions on the surface of the crystalline silicon battery 3. After the detection result is averaged and compared with the standard data, the conveyor belt 101 drives the crystalline silicon battery 3 to move backward after the detection is completed, and the cylinder 403 drives the electric suction cup 404 to descend. The electric suction cup 404 is used to absorb the crystalline silicon battery 3, and then the third motor drives the rotation of the column 401 so that the electric suction cup 404 moves the crystalline silicon battery 3 to the specified position, and the qualified products are placed in the finished product box 5, and the unqualified products are placed in the defective box 6, which is convenient for distinction and subsequent processing. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0041] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the protection content of the present invention.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for detecting the reflectivity of a crystalline silicon cell after etching, comprising a detection platform (1), a detection frame (2) and a transfer structure (4), characterized in that: The detection machine (1) comprises a conveyor belt (101), a proximity sensor (102), a control panel (103) and universal wheels (104); the conveyor belt (101) is embedded in the top of the detection machine (1); the proximity sensor (102) is installed on the side wall of the detection machine (1) located on the conveyor belt (101); a control panel (104) is installed on one side of the detection machine (1); a plurality of universal wheels (104) are arranged at the bottom of the detection machine (1); a finished product box (5) is arranged at one end of the detection machine (1); a defective product box (6) is arranged at one side of the detection machine (1); bases (7) are arranged at the bottoms of the finished product box (5) and the defective product box (6); and the control panel (103) is electrically connected to the conveyor belt (101), the proximity sensor (102), the first motor (201), the second motor (205), the irradiation lamp (206), the electric suction cup (404), the third motor and the light sensor; The detection frame (2) comprises a first motor (201), a rotating disk (202), a lead screw (203), a sliding block (204), a second motor (205), an irradiation lamp (206), a receiving plate (207), an annular groove (208), a connecting ring (209) and a roller (210); the detection frame (2) is arranged on the top of the detection machine (1); the first motor (201) is installed on the top of the detection frame (2); the rotating disk (202) is installed on the bottom of the detection frame (2); a sliding groove is provided in the rotating disk (202), and a lead screw (203) is installed in the sliding groove; the lead screw (203) passes through two sliding blocks (204).

2. The device for detecting reflectivity of a crystalline silicon cell after etching according to claim 1, characterized in that: An irradiation lamp (206) and a receiving plate (207) are respectively installed at the bottom of the two sliding blocks (204); a light sensor is arranged inside the receiving plate (207); a light outlet of the irradiation lamp (206) is aligned with the center of the conveyor belt (101); and the positions of the receiving plate (207) and the irradiation lamp (206) are mirror-imaged with the center of the conveyor belt (101) as the axis.

3. The device for detecting reflectivity of a crystalline silicon cell after etching according to claim 1, characterized in that: A second motor (205) is provided on the side of the rotating disk (202), and the output shaft of the second motor (205) is connected to the lead screw (203), and the output shaft of the first motor (201) is connected to the rotating disk (202).

4. The device for detecting reflectivity of a crystalline silicon cell after etching according to claim 1, characterized in that: A connecting ring (209) is installed on the top of the rotating disk (202), and an annular groove (208) with an inverted "convex" cross-section is opened on the bottom of the detection frame (2), the top of the connecting ring (209) is inserted into the annular groove (208), and rollers (210) are installed on both sides of the connecting ring (209).

5. The device for detecting reflectivity of a crystalline silicon cell after etching according to claim 1, characterized in that: The conveyor belt (101) of the detection machine (1) is connected to the conveyor line of the crystalline silicon battery (3).

6. The device for detecting reflectivity of a crystalline silicon cell after etching according to claim 1, characterized in that: The transfer structure (4) comprises a column (401), a cross bar (402), a cylinder (403) and an electric suction cup (404). The transfer structure (4) is arranged on one side of the top of the detection machine (1). The column (401) of the transfer structure (4) is equipped with a cross bar (402). The bottom of the other end of the cross bar (402) is equipped with a cylinder (403). The output shaft of the cylinder (403) is equipped with an electric suction cup (404).

7. The device for detecting reflectivity of a crystalline silicon cell after etching according to claim 1, characterized in that: A third motor is provided inside the detection machine (1) at the bottom of the column (401), and an output shaft of the third motor is connected to the column (401).

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