Topcon battery piece water film coverage integrity detection device

Abstract

The invention relates to the technical field of Topcon battery detection, in particular to a Topcon battery piece water film coverage integrity detection device which comprises a battery piece body placed on a conveying machine body and a mounting box arranged at the top of the battery piece body, and a detection assembly used for accurately detecting the battery piece water film coverage integrity is arranged on the inner side of the mounting box. The detection assembly comprises a laser transmitter fixedly arranged in the middle of the inner side of the mounting box, the laser transmitter is obliquely mounted, light emitted by the laser transmitter falls on the edge of the battery piece body, and the first photosensitive elements are fixedly arranged at the two ends of the inner side of the mounting box respectively. According to the invention, accurate detection of the coverage integrity of the water film is realized, the two light paths also have a high separation degree when the water film is thin, so that the coverage condition of the water film is accurately judged, and compared with the existing water film detection method based on the thickness difference, the detection device is simple and reasonable in structure, convenient to operate and low in cost. The requirement for a high-precision laser ranging device is avoided, and the equipment cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of Topcon battery detection, and in particular to a device for detecting the completeness of water film coverage of a Topcon battery sheet. Background Art

[0002] N-type Topcon cells have the characteristics of high opening voltage, high filling and high photoelectric conversion efficiency, and the cost of transformation is low, so they have received a lot of attention. In the manufacturing process of Topcon cells, there are two wet processes that require covering the surface of the cell with a water film to protect the front and back of the cell from HF corrosion. If the protected surface is corroded by HF, it will cause high leakage at the edge of the cell, reduce the photoelectric conversion efficiency, and affect the service life of the cell. In the process of studying the edge leakage of Topcon cells, it was found that when the water film coverage is not complete, the edge leakage will be aggravated; secondly, it was found that when the water film coverage is too complete, the side that needs to be corroded by HF is prone to insufficient corrosion, that is, insufficient removal of phosphorus silicon glass (PSG) or borosilicate glass (BSG), which will also aggravate the occurrence of leakage. Therefore, it is very important to detect the degree of water film coverage.

[0003] In the existing technical solution, CN219303611U is a device for monitoring the completeness of water film coverage of solar cell sheets, which relates to the technical field of solar cell monitoring equipment, and specifically to a device for monitoring the completeness of water film coverage of solar cell sheets. It includes a main body, a laser, a semi-transparent and semi-reflective mirror, a reflector, and a cell. The laser is fixedly arranged in the middle part of the top of the main body, the semi-transparent and semi-reflective mirror is arranged in the middle part of the upper end of the main body, a reflector is arranged on both sides of the upper end of the main body, and a cell is arranged at the lower end of the main body. The above technical solution solves the problem raised in the above background technology, but the above technical solution uses the difference in thickness when there is water film and when there is no water film to realize the detection of the completeness of the water film. Since the thickness of the water film is very small, the use of laser to detect the thickness difference of the water film requires high precision, and thus requires a high-precision laser ranging device to achieve it, which increases the cost. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a Topcon battery cell water film coverage integrity detection device, which solves the problem that the prior art needs to use laser to detect the thickness difference of the water film, which requires a high-precision laser ranging device and increases costs.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A Topcon cell water film coverage completeness detection device comprises a cell body placed on a conveyor body, and a mounting box arranged on the top of the cell body, wherein a detection component for accurately detecting the water film coverage completeness of the cell body is arranged on the inner side of the mounting box, and the detection component comprises a laser emitter fixedly arranged in the middle of the inner side of the mounting box, the laser emitter is installed obliquely, and the emitted light of the laser emitter falls on the edge of the cell body, and a photosensitive element 1 is respectively fixedly arranged at both ends of the inner side of the mounting box, and a photosensitive element 2 fixed on the inner side of the mounting box is arranged on one side of the two photosensitive elements 1, and when there is a water film, the photosensitive element 1 and the laser of the laser emitter are symmetrical with respect to the vertical plane of the point where the laser falls on the water film, and when there is no hydrogel film, the photosensitive element 1 and the laser of the laser emitter are symmetrical with respect to the vertical plane of the point where the laser falls on the cell body.

[0007] As a further optimization solution of the present invention, the photosensitive element 1 is set to be any one of a light sensor and a photoresistor, and the photosensitive element 2 is set to be any one of a light sensor and a photoresistor.

[0008] As a further optimization solution of the present invention, a trapezoidal opening is integrally formed at the bottom of the installation box, and light-shielding channels located at the bottom of the installation box are respectively provided at both ends of the trapezoidal opening.

[0009] As a further optimization solution of the present invention, both ends of the installation box are detachably provided with support seats installed on the conveying body.

[0010] As a further optimization solution of the present invention, a cover plate for protecting the detection component is provided on one side of the installation box, and a clamping component for quickly disassembling and assembling the cover plate is provided on the installation box.

[0011] As a further optimization scheme of the present invention, the clamping assembly includes a support frame fixed in the top of both ends of the installation box, and a movable plug block slidably arranged in one end of the support frame and fixed to the cover plate, and a trapezoidal groove is opened on one side of the movable plug block.

[0012] As a further optimization scheme of the present invention, a movable block sliding with the support frame is arranged on the inner side of the trapezoidal groove, and matching inclined surfaces are arranged on one end of the movable block and the movable plug-in block, and an elastic part fixed to the support frame is fixed on one end of the movable block.

[0013] As a further optimization scheme of the present invention, a strip slide groove is provided on the top of the installation box, and the two ends of the strip slide groove pass through the top of the installation box and extend to the inner side thereof, and movable connecting rods are slidably provided at both ends of the strip slide groove, and the bottom of one end of the two movable connecting rods are respectively fixedly connected to the two movable plug-in blocks, and T-shaped pull blocks are respectively fixed at the ends of the two movable connecting rods that are close to each other.

[0014] By means of the above technical solution, the present invention provides a Topcon cell water film coverage integrity detection device, which has at least the following beneficial effects compared with the prior art:

[0015] 1. The present invention realizes accurate detection of the completeness of water film coverage by setting photosensitive element 1 and photosensitive element 2 to correspond to the laser reflection paths in the state with water film and the state without water film respectively. When the water film is thin, the two optical paths also have a high degree of separation, so as to accurately judge the coverage of the water film. Compared with the existing method of water film detection based on thickness difference, the structure of the detection device is simple and reasonable, avoiding the need for high-precision laser ranging devices and reducing equipment costs. At the same time, its simple structural design is also conducive to maintenance and operation.

[0016] 2. The present invention can timely adjust process parameters by effectively monitoring the completeness of water film coverage to ensure effective protection during HF corrosion, thereby reducing the occurrence of edge leakage and improving the photoelectric conversion efficiency and service life of the battery cell.

[0017] 3. The present invention can quickly complete the detection of the completeness of the water film coverage of the battery cell, which is suitable for real-time monitoring needs in an online production environment, and helps to improve production efficiency and product quality control; and the detection device is compactly designed and can be easily integrated into an existing solar cell production line without significantly modifying the production line layout or process. It has good compatibility and adaptability, and expands the scope of application of the detection device.

[0018] 4. The present invention provides a clamping assembly to quickly disassemble and assemble the cover plate, so that the operator can perform maintenance, cleaning and inspection of the detection assembly in the installation box in a shorter time, thereby reducing downtime and improving production efficiency. It can also ensure that the cover plate is firmly fixed on the installation box, avoiding the service life of the detection assembly being affected by loose cover plate, thereby improving the reliability of the detection device and the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the installation box of the present invention;

[0022] Figure 3 It is a front perspective cross-sectional view of the installation box of the present invention;

[0023] Figure 4It is an exploded schematic diagram of the clamping assembly of the present invention.

[0024] In the figure: 1. Conveyor body; 2. Battery cell body; 3. Installation box;

[0025] 4. Detection component; 41. Laser transmitter; 42. Photosensitive element 1; 43. Photosensitive element 2; 44. Trapezoidal opening; 45. Light-shielding channel;

[0026] 5. Cover plate; 6. Support seat;

[0027] 7. Clamping assembly; 71. Support frame; 72. Movable plug block; 73. Trapezoidal groove; 74. Movable clamping block; 75. Elastic member; 76. Movable connecting rod; 77. T-shaped pull block. DETAILED DESCRIPTION

[0028] 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.

[0029] First embodiment

[0030] When the water film coverage of Topcon solar cells is incomplete, the leakage at the edge will be aggravated. When the water film coverage is too complete, the side that needs to be corroded by HF is prone to insufficient corrosion, that is, insufficient removal of phosphorus silicon glass (PSG) or borosilicate glass (BSG), which will also aggravate the leakage. Therefore, it is very important to detect the degree of water film coverage. Since traditional detection devices need to use laser ranging devices to detect the thickness difference of water film, which increases the cost, in order to achieve accurate detection of the completeness of water film coverage, the two optical paths also have a higher degree of separation when the water film is thin, so as to accurately judge the coverage of the water film. Figure 1 - Figure 3 This embodiment provides a Topcon battery cell water film coverage integrity detection device, which consists of a mounting box 3, a detection component 4 and a cover plate 5. The battery cell body 2 is transported to the bottom of the mounting box 3 through a conveying body 1 to detect the water film coverage integrity.

[0031] Both ends of the installation box 3 are detachably provided with support seats 6 installed on the conveyor body 1, so that the entire detection device can be easily integrated into the existing solar cell production line without significantly modifying the production line layout or process, and has good compatibility and adaptability. A cover plate 5 for providing protection for the detection component 4 is provided on one side of the installation box 3. By opening the cover plate 5, the detection component 4 in the installation box 3 can be inspected and maintained.

[0032] In order to avoid the need for a high-precision laser ranging device and reduce the equipment cost, a detection component 4 for accurately detecting the completeness of the water film coverage of the battery cell is provided on the inner side of the installation box 3. The detection component 4 includes a laser emitter 41 fixedly arranged in the middle of the inner side of the installation box 3. The laser emitter 41 is installed at an angle, and the emitted light of the laser emitter 41 falls on the edge of the battery cell body 2, and a photosensitive element 42 is respectively fixedly arranged at both ends of the inner side of the installation box 3. One side of the two photosensitive elements 1 42 is provided with a photosensitive element 2 43 fixed on the inner side of the installation box 3. When there is a water film, the lasers of the photosensitive element 1 42 and the laser emitter 41 fall on the vertical plane symmetrically of the point on the water film. When there is no hydrogel film, the lasers of the photosensitive element 1 42 and the laser emitter 41 fall on the vertical plane symmetrically of the point on the battery cell body 2.

[0033] Photosensitive element 1 42 is set to be either a light sensor or a photoresistor, and photosensitive element 2 43 is set to be either a light sensor or a photoresistor. The photosensitive element can sensitively receive reflected or transmitted light signals, can respond to slight coverage differences, and can detect the completeness of water film coverage through changes in light intensity.

[0034] A trapezoidal opening 44 is integrally formed at the bottom of the installation box 3, and light shielding channels 45 are respectively provided at both ends of the trapezoidal opening 44 at the bottom of the installation box 3. The trapezoidal opening 44 and the light shielding channels 45 at both ends can prevent the laser emitter 41 from being blocked from emitting laser.

[0035] When detecting the completeness of water film coverage on the battery cell, the laser is emitted by the laser emitter 41. When there is water film on the battery cell, the light is reflected by the water film to the photosensitive element 1 42. When there is no water film, the light is reflected by the battery cell to the photosensitive element 2 43, thereby realizing the detection of the water film. Since the irradiation angle of the laser emitter 41 is very small relative to the battery cell, the distance between the laser falling on the water surface and the laser falling on the battery cell is increased, thereby forming two light paths with a larger distance between them, which is convenient for identification.

[0036] Second embodiment

[0037] In order to enable the operator to perform maintenance, cleaning and inspection of the detection component 4 in a shorter time and reduce downtime, refer to Figure 2 and Figure 4In this embodiment, a clamping assembly 7 for quickly disassembling and assembling the cover plate 5 is provided on the installation box 3. The specific implementation method is that the clamping assembly 7 includes a support frame 71 respectively fixed in the top of both ends of the installation box 3, and a movable plug block 72 slidably arranged in one end of the support frame 71 and fixed to the cover plate 5. A trapezoidal groove 73 is provided on one side of the movable plug block 72, and an active clamping block 74 sliding with the support frame 71 is provided on the inner side of the trapezoidal groove 73, and the active clamping block 74 and one end of the active clamping block 72 are provided with a matching inclined surface, and one end of the active clamping block 74 is fixed with an elastic member 7 fixed to the support frame 71 5. When the movable plug block 72 is inserted into the inner side of the support frame 71, the movable clamping block 74 is pushed to move in the support frame 71, and the movement directions of the movable plug block 72 and the movable clamping block 74 are perpendicular to each other. The movable clamping block 74 squeezes the elastic member 75, and the elastic member 75 is elastically deformed and compressed. When the movable plug block 72 is fully inserted into the support frame 71, the trapezoidal groove 73 corresponds to the position of the movable clamping block 74, and the elastic member 75 restores the elastic deformation to push the movable clamping block 74 into the trapezoidal groove 73, so that the movable clamping block 74 clamps the movable plug block 72 on the installation box 3, thereby fixing the cover plate 5 on the installation box 3.

[0038] The top of the installation box 3 is provided with a strip slide, and the two ends of the strip slide pass through the top of the installation box 3 and extend to the inside thereof, and movable connecting rods 76 are slidably provided at the two ends of the strip slide, and the bottom of one end of the two movable connecting rods 76 are respectively fixedly connected to the two movable plug blocks 72, and the ends of the two movable connecting rods 76 close to each other are respectively fixed with T-shaped pull blocks 77. When it is necessary to remove the cover plate 5, the operator simultaneously pulls the two T-shaped pull blocks 77 toward the middle, and the two T-shaped pull blocks 77 respectively pull the movable connecting rods 76 on one side to move, and the two movable connecting rods 76 slide on the inner sides of the two strip slides respectively, and the movable connecting rods 76 pull the movable clamping block 74 to move, and pull the movable clamping block 74 out of the trapezoidal groove 73, so that the movable plug block 72 is not clamped, so that the cover plate 5 can be quickly removed from the installation box 3, and the maintenance, cleaning and inspection of the detection component 4 in the installation box 3 can be carried out.

[0039] The present invention emits laser light through the laser emitter 41. When there is water film on the cell, the light is reflected by the water film to the photosensitive element 1 42. When there is no water film on the cell, the light is reflected by the cell to the photosensitive element 2 43, thereby realizing accurate detection of the completeness of the water film coverage. When the water film is thin, the two light paths also have a high degree of separation, thereby accurately judging the coverage of the water film.

[0040] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Topcon cell water film coverage integrity detection device, comprising a cell body (2) placed on a conveyor body (1), and a mounting box (3) arranged on the top of the cell body (2), characterized in that: A detection component (4) for accurately detecting the completeness of water film coverage of the battery cell is arranged on the inner side of the installation box (3); The detection component (4) comprises a laser emitter (41) fixedly arranged in the middle of the inner side of the installation box (3), the laser emitter (41) being installed at an angle, and the emitted light of the laser emitter (41) falls on the edge of the battery cell body (2), and a photosensitive element (42) fixedly arranged at both ends of the inner side of the installation box (3), and a photosensitive element (43) fixed to the inner side of the installation box (3) is arranged on one side of the two photosensitive elements (42). When there is a water film, the photosensitive element (42) and the laser of the laser emitter (41) fall on the point on the water film in a vertical plane symmetrical, and when there is no hydrogel film, the photosensitive element (42) and the laser of the laser emitter (41) fall on the point on the battery cell body (2) in a vertical plane symmetrical.

2. A Topcon cell water film coverage integrity detection device according to claim 1, characterized in that: The photosensitive element 1 (42) is configured as any one of a light sensor and a photoresistor, and the photosensitive element 2 (43) is configured as any one of a light sensor and a photoresistor.

3. A Topcon cell water film coverage integrity detection device according to claim 1, characterized in that: The bottom of the installation box (3) is integrally formed with a trapezoidal opening (44), and both ends of the trapezoidal opening (44) are respectively provided with light shielding channels (45) located at the bottom of the installation box (3).

4. A Topcon cell water film coverage integrity detection device according to claim 1, characterized in that: Support seats (6) mounted on the conveyor body (1) are detachably provided at both ends of the installation box (3).

5. A Topcon cell water film coverage integrity detection device according to claim 1, characterized in that: A cover plate (5) for protecting the detection component (4) is provided on one side of the installation box (3), and a clamping component (7) for quickly disassembling and assembling the cover plate (5) is provided on the installation box (3).

6. A Topcon cell water film coverage integrity detection device according to claim 5, characterized in that: The clamping assembly (7) comprises a support frame (71) fixed in the top of both ends of the installation box (3), and a movable plug block (72) slidably arranged in one end of the support frame (71) and fixed to the cover plate (5), and a trapezoidal groove (73) is formed on one side of the movable plug block (72).

7. A Topcon cell water film coverage integrity detection device according to claim 6, characterized in that: An active clamping block (74) is provided inside the trapezoidal groove (73) and slides with the support frame (71), and matching inclined surfaces are provided at one end of the active clamping block (74) and the active plug-in block (72), and an elastic member (75) fixed to the support frame (71) is fixed at one end of the active clamping block (74).

8. A Topcon cell water film coverage integrity detection device according to claim 7, characterized in that: A strip-shaped slide groove is provided on the top of the installation box (3), and the two ends of the strip-shaped slide groove penetrate the top of the installation box (3) and extend to the inner side thereof, and movable connecting rods (76) are slidably provided on the two ends of the strip-shaped slide groove.

9. A Topcon cell water film coverage integrity detection device according to claim 7, characterized in that: The bottoms of one end of the two movable connecting rods (76) are respectively fixedly connected to the two movable plug blocks (72), and the ends of the two movable connecting rods (76) close to each other are respectively fixed with T-shaped pull blocks (77).

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