Photovoltaic cell detection equipment

Abstract

The invention discloses photovoltaic cell detection equipment. The photovoltaic cell detection equipment comprises a mounting rack and a detection assembly. The photovoltaic cell is provided with a detection area, the detection assembly comprises a laser emitting part and a first camera, the laser emitting part and the first camera are both suitable for being opposite to the detection area and are both perpendicular to the detection area, and the laser emitting part is used for emitting detection light of a preset wavelength to the detection area. The first camera is used for collecting internal images of the detection area. Detection light with a preset wavelength is emitted to a detection area through a laser emitting part, ions in the detection area absorb the detection light and jump to a high-energy state, then the ions jump to a stable state from the high-energy state and release radiation light outwards, and a first camera generates an internal image of the detection area; and a detector judges whether the photovoltaic cell has internal defects or not through the internal image. According to the invention, the photovoltaic cell without the conductive lead can be detected, so that the quality hidden danger of the photovoltaic cell can be reduced.

Description

Technical Field

[0001] This application relates to the field of photovoltaic cell detection, and particularly to a photovoltaic cell detection device. Background Art

[0002] In related technologies, photovoltaic cells are made by laminating and splicing multiple photovoltaic cells. Before laminating and splicing the photovoltaic cells, internal defect detection needs to be carried out on the photovoltaic cells. Photovoltaic cells containing internally defective photovoltaic cells are unqualified products and need to be scrapped. Traditional photovoltaic cells are provided with conductive leads, and the detection device is powered on through the conductive leads to detect the internal defects of the photovoltaic cells. After the structure of the photovoltaic cells is changed, the conductive leads of the photovoltaic cells are cancelled, and the detection device cannot power on the photovoltaic cells to detect the internal defects of the photovoltaic cells, resulting in quality hidden dangers for the photovoltaic cells after the conductive leads are cancelled. Summary of the Invention

[0003] In order to enable the detection device to detect photovoltaic cells after the conductive leads are cancelled and to minimize the quality hidden dangers of the photovoltaic cells as much as possible, this application provides a photovoltaic cell detection device.

[0004] A photovoltaic cell detection device provided by this application adopts the following technical solutions: A photovoltaic cell detection device includes: a mounting rack, on which a photovoltaic cell is adapted to be placed, and the photovoltaic cell has a detection area; a detection component, which is arranged on the mounting rack, and the detection component includes a laser emitter and a first camera. Both the laser emitter and the first camera are adapted to face the detection area, and both the laser emitter and the first camera are vertically arranged with respect to the detection area. The laser emitter is used to emit detection light with a preset wavelength to the detection area, and the first camera is used to collect the internal image of the detection area.

[0005] By adopting the above technical solutions, the laser emitter emits detection light with a preset wavelength to the detection area. Ions inside the detection area absorb the detection light and transition from the stable state to the high-energy state. When the ions inside the detection area transition from the high-energy state to the stable state, the ions inside the detection area release radiation light to the external environment. The first camera receives the radiation light and generates the internal image of the detection area. The detection personnel judge whether there are internal defects in the photovoltaic cell through the internal image. Compared with the prior art, the photovoltaic cell detection device can detect photovoltaic cells after the conductive leads are cancelled, thereby reducing the quality hidden dangers of the photovoltaic cells, and preventing photovoltaic cells with internal defects from being made into photovoltaic cell modules, thereby improving the quality of the photovoltaic cell modules.

[0006] Preferably, the photovoltaic cell detection device further includes: a conveyor belt pivotally mounted on the mounting frame, the photovoltaic cell being adapted to be placed on the conveyor belt, the conveyor belt being driven to convey the photovoltaic cell in a first direction of the mounting frame, the detection areas being multiple, the multiple detection areas being arranged in sequence along the first direction of the photovoltaic cell, and the detection components sequentially detecting the multiple detection areas.

[0007] By adopting the above technical solution, the conveyor belt conveys the photovoltaic cell in the first direction of the mounting frame, and the detection components sequentially detect multiple detection areas. When the number of detection areas of the photovoltaic cell is large, such a setting can reduce the number of detection components, thereby reducing the manufacturing cost of the photovoltaic cell detection device.

[0008] Preferably, the photovoltaic cell detection device further includes: a controller communicatively connected to the first camera, the controller being configured to sequentially splice multiple internal images collected by the first camera.

[0009] By adopting the above technical solution, the controller sequentially splices multiple internal images in the shooting order to form a complete internal image of the photovoltaic cell. The inspector can quickly determine whether there are internal defects in the photovoltaic cell by viewing the complete internal image, and there is no need for the inspector to view multiple internal images one by one to determine whether there are internal defects in the photovoltaic cell, thereby improving the detection efficiency of the photovoltaic cell.

[0010] Preferably, both the laser emitter and the first camera are multiple, the multiple laser emitters and the multiple first cameras are spaced apart along a second direction of the mounting frame, and the multiple laser emitters and the multiple first cameras are arranged in one-to-one correspondence.

[0011] By adopting the above technical solution, when the length dimension of the photovoltaic cell is large, a single laser emitter and a single first camera cannot completely cover the detection area along the length direction of the photovoltaic cell. By jointly detecting a detection area with multiple laser emitters and multiple first cameras, the detection efficiency of the photovoltaic cell detection device can be improved. The length direction of the photovoltaic cell may refer to the second direction of the mounting frame.

[0012] Preferably, there are two detection components, the two detection components are spaced apart along the height direction of the mounting frame, and the photovoltaic cell is located between the two detection components.

[0013] By adopting the above technical solution, the two detection components respectively detect the detection area of the upper end wall of the photovoltaic cell and the detection area of the lower end wall of the photovoltaic cell, so that it is not necessary for the detector to flip the photovoltaic cell after detecting the detection area of the upper end wall of the photovoltaic cell and then detect the detection area of the lower end wall of the photovoltaic cell. Furthermore, the detection efficiency of the photovoltaic cell can be improved, and the user experience of the photovoltaic cell detection device can be enhanced.

[0014] Preferably, a high-pass filter is provided at the receiving end of the first camera.

[0015] By adopting the above technical solution, the high-pass filter is used to filter light with a wavelength lower than a preset filtering wavelength, so as to avoid ambient light and stray light from interfering with the first camera. Furthermore, the imaging quality of the internal image can be improved, and the difficulty for the detector to view the internal image can be reduced.

[0016] Preferably, the detection component further includes a second camera, which is adapted to face the detection area and is vertically arranged with respect to the detection area. The second camera is used to collect the external image of the detection area.

[0017] By adopting the above technical solution, the second camera collects the external image of the detection area, and the detector confirms whether there are external defects in the detection area by viewing the external image, so as to achieve the technical effect of detecting external defects of the photovoltaic cell.

[0018] Preferably, the photovoltaic cell detection device further includes: a darkroom, which defines a detection space. The mounting rack is arranged in the darkroom. A plurality of light-emitting elements and a plurality of diffuser plates are arranged in the darkroom. The plurality of light-emitting elements and the plurality of diffuser plates are both spaced apart along the radial direction of the mounting rack, and the plurality of light-emitting elements and the plurality of diffuser plates are arranged in one-to-one correspondence. The diffuser plate is opposite to both the light-emitting element and the photovoltaic cell. The light-emitting element is used to emit illumination light to the diffuser plate, and the diffuser plate is used to reflect the illumination light to the photovoltaic cell.

[0019] By adopting the above technical solution, the light in the external environment is isolated by the darkroom, and each of the plurality of light-emitting elements emits illumination light toward the corresponding diffuser plate. Then, the diffuser plate reflects the illumination light to the outer surface of the photovoltaic cell, so that the outer surface of the photovoltaic cell is evenly illuminated by the illumination light reflected by the diffuser plate. Thus, the brightness uniformity of the external image can be improved, the imaging quality of the external image can be improved, and the difficulty for the detector to view the external image can be reduced.

[0020] Preferably, a low-pass filter is provided at the receiving end of the second camera.

[0021] By adopting the above technical solution, a low-pass filter is arranged at the receiving end of the second camera. The low-pass filter is used to filter the radiation light, so as to prevent the radiation light from interfering with the second camera to collect the external image of the detection area, and further improve the imaging quality of the external image. And by setting the first camera and the second camera in this way, they can work simultaneously, thus improving the detection efficiency of the photovoltaic cell detection device.

[0022] Preferably, there are a plurality of the second cameras, and the plurality of the second cameras are arranged at intervals along the radial direction of the mounting frame.

[0023] By adopting the above technical solution, when there are a plurality of detection areas, the plurality of second cameras are arranged in one-to-one correspondence with the plurality of detection areas. By simultaneously collecting the external images of the corresponding detection areas by the plurality of second cameras, the detection time of the photovoltaic cells can be reduced, and further the detection efficiency of the photovoltaic cells can be improved.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The detection light of a preset wavelength is emitted to the detection area by the laser emitter. The ions inside the detection area absorb the detection light and jump from the stable state to the high-energy state. When the ions inside the detection area jump from the high-energy state to the stable state, the ions inside the detection area release radiation light to the external environment. The first camera receives the radiation light and generates the internal image of the detection area. The detection personnel judge whether there are internal defects in the photovoltaic cell through the internal image. Compared with the prior art, the photovoltaic cell detection device can detect the photovoltaic cell after removing the conductive leads, thereby reducing the quality hidden danger of the photovoltaic cell, and preventing the photovoltaic cell with internal defects from being made into a photovoltaic cell module, thereby improving the quality of the photovoltaic cell module; 2. The two detection components respectively detect the detection area on the upper end wall of the photovoltaic cell and the detection area on the lower end wall of the photovoltaic cell, so that it is not necessary for the detection personnel to flip the photovoltaic cell after detecting the detection area on the upper end wall of the photovoltaic cell and then detect the detection area on the lower end wall of the photovoltaic cell, thereby improving the detection efficiency of the photovoltaic cell and the user experience of the photovoltaic cell detection device; 3. The high-pass filter is used to filter the light with a wavelength lower than the preset filtering wavelength, so as to avoid the environmental light and stray light from interfering with the first camera, and further improve the imaging quality of the internal image, and reduce the difficulty for the detection personnel to view the internal image. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a partial structure of the photovoltaic cell detection device according to an embodiment of the present application; Figure 2 is Figure 1 an enlarged schematic view of part A in Figure 3 is a cross-sectional view of a partial structure of a photovoltaic cell detection device according to an embodiment of the present application; Figure 4 is a cross-sectional view of a photovoltaic cell detection device according to an embodiment of the present application.

[0026] Explanation of reference numerals: 100, photovoltaic cell detection device; 1, mounting frame; 11, detection hole; 2, detection assembly; 21, laser emitter; 22, first camera; 221, high-pass filter; 23, second camera; 231, low-pass filter; 3, conveyor belt; 4, darkroom; 41, detection space; 42, light-emitting element; 43, diffuser; 5, photovoltaic cell. Detailed implementation manners

[0027] The following further describes the present application in detail with reference to the attached Figures 1-4 drawings.

[0028] An embodiment of the present application discloses a photovoltaic cell detection device 100.

[0029] Referring to Figures 1-3 , the photovoltaic cell detection device 100 according to an embodiment of the present application includes: a mounting frame 1 and a detection assembly 2. The photovoltaic cell 5 is adapted to be placed on the mounting frame 1. The photovoltaic cell 5 has a detection area. Specifically, along the height direction of the photovoltaic cell 5, the height direction of the photovoltaic cell 5 may refer to Figure 1 the up and down direction in

[0030] , and the detection area is located on the upper end face and / or the lower end face of the photovoltaic cell 5. The detection assembly 2 is disposed on the mounting frame 1. The detection assembly 2 includes a laser emitter 21 and a first camera 22. Both the laser emitter 21 and the first camera 22 are adapted to be opposite to the detection area. Specifically, when the photovoltaic cell 5 is placed on the mounting frame 1, both the laser emitter 21 and the first camera 22 are opposite to the detection area, and both the laser emitter 21 and the first camera 22 are perpendicularly disposed with respect to the detection area. Figure 1 In some specific embodiments, along the height direction of the mounting frame 1, the detection assembly 2 is located above the photovoltaic cell 5. The height direction of the mounting frame 1 may refer to

[0031] In some specific embodiments, the laser emitter 21 is an infrared laser emitter 21 or the like, and the first camera 22 is a CCD (Charge-Coupled Device camera) camera or the like.

[0032] Moreover, the laser emitter 21 is configured to emit detection light of a preset wavelength to the detection area, and the first camera 22 is configured to collect an internal image of the detection area.

[0033] Specifically, first, the laser emitter 21 emits detection light of a preset wavelength to the detection area. Ions inside the detection area absorb the detection light, and then the ions inside the detection area transition from a stable state to a high-energy state. The ions in the high-energy state are unstable, and the ions in the high-energy state tend to transition to a stable state. When the ions inside the detection area transition from the high-energy state to the stable state, the ions inside the detection area release radiation light to the external environment. The first camera 22 receives the radiation light and generates an internal image of the detection area. It should be noted that there are multiple ions inside the detection area.

[0034] In some specific embodiments, the color of the internal image can consist of black and gray. When there are no internal defects inside the detection area, the internal image is a gray image with uniform brightness. When there are defects inside the detection area, the area corresponding to the internal defect on the internal image is displayed as a black block. The inspector can determine whether there are internal defects in the photovoltaic cell 5 by observing whether there are black blocks in the internal image.

[0035] In some specific embodiments, the internal defect can be debris in the photovoltaic cell 5 or the like. The internal defect blocks the detection light, resulting in the ions corresponding to the internal defect being unable to absorb the detection light, and thus the ions corresponding to the internal defect are unable to release radiation light to the external environment. The first camera 22 cannot receive the radiation light of the ions corresponding to the internal defect, thereby forming a black block in the area corresponding to the internal defect on the internal image.

[0036] It should be noted that when the laser emitter 21 emits detection light to the detection area, the first camera 22 does not work.

[0037] In some specific embodiments, the preset wavelength can be one of 750 nm - 900 nm, and the preset wavelengths corresponding to photovoltaic cells 5 of different materials are different.

[0038] Thus, a detection light ray with a preset wavelength is emitted by the laser emitter 21 towards the detection area. Ions inside the detection area absorb the detection light ray and transition from the stable state to the high-energy state. When the ions inside the detection area transition from the high-energy state to the stable state, the ions inside the detection area release radiation light rays to the external environment. The first camera 22 receives the radiation light rays and generates an internal image of the detection area. The inspector determines whether there are internal defects in the photovoltaic cell 5 based on the internal image. Compared with the prior art, the photovoltaic cell detection device 100 can detect the photovoltaic cell 5 after removing the conductive leads, thereby reducing the quality risks of the photovoltaic cell 5 and preventing the photovoltaic cell 5 with internal defects from being made into a photovoltaic cell 5 module, thus improving the quality of the photovoltaic cell 5 module.

[0039] Referring Figure 1 and Figure 3 , in some embodiments of the present application, the photovoltaic cell detection device 100 may further include: a conveyor belt 3 pivotally mounted on the mounting frame 1. The photovoltaic cell 5 is adapted to be placed on the top surface of the conveyor belt 3. When the conveyor belt 3 is driven, it conveys the photovoltaic cell 5 in the first direction of the mounting frame 1. The first direction of the mounting frame 1 may refer to Figure 1 the left-right direction in Figure 1 . The detection areas are multiple, and the multiple detection areas are arranged in sequence along the first direction of the photovoltaic cell 5. The detection assembly 2 sequentially detects the multiple detection areas. The first direction of the photovoltaic cell 5 may refer to Figure 1 the left-right direction in and the first direction of the mounting frame 1 is the same as the first direction of the photovoltaic cell 5.

[0040] In some specific embodiments, there are two detection areas. In the direction from right to left along the first direction of the photovoltaic cell 5, the two detection areas are respectively the first detection area and the second detection area. The conveyor belt 3 conveys the photovoltaic cell 5 from left to right. When the first detection area faces the detection assembly 2, the conveyor belt 3 stops conveying the photovoltaic cell 5, and the detection assembly 2 acquires the internal image of the first detection area. After the detection assembly 2 finishes detecting the first detection area, the conveyor belt 3 conveys the photovoltaic cell 5.

[0041] When the second detection area faces the detection assembly 2, the conveyor belt 3 stops conveying the photovoltaic cell 5, and the detection assembly 2 acquires the internal image of the second detection area. After the detection assembly 2 finishes detecting the second detection area, the conveyor belt 3 conveys the photovoltaic cell 5 to the preset storage area, thereby completing the internal defect detection of the photovoltaic cell 5.

[0042] The inspector determines whether there are internal defects in the photovoltaic cell 5 by viewing the internal images of the first detection area and the second detection area.

[0043] The photovoltaic cell 5 is conveyed along the first direction of the mounting frame 1 by the conveyor belt 3, and the detection assembly 2 sequentially detects a plurality of detection areas. When the number of detection areas of the photovoltaic cell 5 is large, such a setting can reduce the number of detection assemblies 2, thereby reducing the manufacturing cost of the photovoltaic cell detection device 100.

[0044] In some specific embodiments, there may be a plurality of detection assemblies 2. The plurality of detection assemblies 2 are spaced apart along the first direction of the mounting frame 1, and the plurality of detection assemblies 2 and the plurality of detection areas are arranged in one-to-one correspondence. The plurality of detection assemblies 2 simultaneously detect the corresponding detection areas. Such a setting can reduce the time for the photovoltaic cell detection device 100 to detect internal defects of the photovoltaic cell 5, thereby improving the detection efficiency of the photovoltaic cell detection device 100.

[0045] It should be noted that the mounting frame 1 is provided with a driving roller, a driven roller and a motor. The driving roller and the driven roller are both pivotally mounted on the mounting frame 1, and the driving roller and the driven roller are spaced apart along the first direction of the mounting frame 1. The conveyor belt 3 is wound around the outer peripheral walls of the driving roller and the driven roller, and the conveyor belt 3 is in driving connection with both the driving roller and the driven roller. The motor is connected and cooperated with the driving roller, and the motor drives the driving roller to drive the conveyor belt 3 to rotate so as to convey the photovoltaic cell 5 by the conveyor belt 3.

[0046] In some embodiments of the present application, the photovoltaic cell detection device 100 may further include: a controller, which is communicatively connected with the first camera 22, and the controller is used to sequentially splice a plurality of internal images collected by the first camera 22.

[0047] Specifically, the controller performs distortion correction, brightness correction and mean filtering processing on each of the plurality of internal images generated by the first camera 22 to remove the distortion of the plurality of internal images and foreign objects on the plurality of internal images, and to unify the brightness of the plurality of internal images. Then, the controller sequentially splices the plurality of internal images according to the shooting order through an artificial intelligence model to form a complete internal image of the photovoltaic cell 5. The inspector can quickly determine whether there are internal defects in the photovoltaic cell 5 by viewing the complete internal image, and the inspector does not need to view each of the plurality of internal images one by one to determine whether there are internal defects in the photovoltaic cell 5, thereby improving the detection efficiency of the photovoltaic cell 5.

[0048] Refer to Figure 1 , in some embodiments of the present application, there are a plurality of laser emitters 21 and a plurality of first cameras 22. The plurality of laser emitters 21 and the plurality of first cameras 22 are both spaced apart along the second direction of the mounting frame 1, and the plurality of laser emitters 21 and the plurality of first cameras 22 are arranged in one-to-one correspondence. The second direction of the mounting frame 1 may refer to Figure 1 the front-back direction in

[0049] When the length dimension of the photovoltaic cell 5 is relatively large, a single laser emitter 21 and a single first camera 22 cannot completely cover the detection area along the length direction of the photovoltaic cell 5. By jointly detecting a detection area with multiple laser emitters 21 and multiple first cameras 22, the detection efficiency of the photovoltaic cell detection device 100 can be improved. The length direction of the photovoltaic cell 5 may refer to the second direction of the mounting frame 1.

[0050] It should be noted that multiple laser emitters 21 and multiple first cameras 22 all work simultaneously.

[0051] Furthermore, the controller is further configured to sequentially splice the internal images of different positions of the same detection area collected by multiple first cameras 22.

[0052] Referring to Figure 1 and Figure 3 In some embodiments of the present application, there are two detection components 2. The two detection components 2 are spaced apart along the height direction of the mounting frame 1, and the photovoltaic cell 5 is located between the two detection components 2.

[0053] In some specific embodiments, one of the two detection components 2 is disposed at the upper end of the mounting frame 1, and the other of the two detection components 2 is disposed at the lower end of the mounting frame 1. Detection areas are provided on both the upper end wall and the lower end wall of the photovoltaic cell 5. The detection component 2 located at the upper end of the mounting frame 1 is adapted to face the detection area on the upper end wall of the photovoltaic cell 5. The mounting frame 1 is provided with a detection hole 11, and the detection hole 11 is configured as a through hole, and the detection hole 11 faces the lower end wall of the photovoltaic cell 5, and the detection hole 11 is adapted to face the detection area on the lower end wall of the photovoltaic cell 5. The detection component 2 located at the lower end of the mounting frame 1 is adapted to face the detection area on the lower end wall of the photovoltaic cell 5 through the detection hole 11.

[0054] Specifically, the two detection components 2 respectively detect the detection area on the upper end wall of the photovoltaic cell 5 and the detection area on the lower end wall of the photovoltaic cell 5. Thus, it is not necessary for the detection personnel to flip the photovoltaic cell 5 and detect the detection area on the lower end wall of the photovoltaic cell 5 after detecting the detection area on the upper end wall of the photovoltaic cell 5. Furthermore, the detection efficiency of the photovoltaic cell 5 can be improved, and the user experience of the photovoltaic cell detection device 100 can be improved.

[0055] Further, when only the upper end wall or the lower end wall of the photovoltaic cell 5 is provided with a detection area, the laser emitters 21 in the detection assembly 2 opposite to the detection area and the laser emitters 21 in the detection assembly 2 opposite to the detection area simultaneously emit detection light to the detection area, and the first camera 22 in the detection assembly 2 opposite to the detection area receives the radiation light and generates a corresponding internal image. With such a setting, the ions in the detection area can fully absorb the detection light, thereby minimizing the situation where some ions in the detection area do not absorb the detection light and cannot release the radiation light, thus improving the accuracy of the internal image.

[0056] Further, there are two conveyor belts 3. The two conveyor belts 3 are arranged at intervals along the first direction of the mounting frame 1, and the detection hole 11 is located between the two conveyor belts 3. The conveyor belt 3 on the left side of the two conveyor belts 3 abuts against the left end of the photovoltaic cell 5, and the conveyor belt 3 on the right side of the two conveyor belts 3 abuts against the right end of the photovoltaic cell 5. The two conveyor belts 3 jointly convey the photovoltaic cell 5.

[0057] Refer to Figure 1 and Figure 2 In some embodiments of the present application, a high-pass filter 221 is provided at the receiving end of the first camera 22. Specifically, the receiving end of the first camera 22 is used to receive the radiation light. The radiation light first passes through the high-pass filter 221 and then is received by the first camera 22. When the first camera 22 receives the radiation light, both the ambient light and the radiation light are received by the first camera 22. The high-pass filter 221 is used to filter light with a wavelength lower than a preset filtering wavelength, thereby avoiding interference from ambient light and stray light to the first camera 22, improving the imaging quality of the internal image, and reducing the difficulty for the inspector to view the internal image.

[0058] In some specific embodiments, the preset filtering wavelength can be 700 nm. That is to say, the high-pass filter 221 can filter light with a wavelength lower than 700 nm.

[0059] Refer to Figures 1-3 In some embodiments of the present application, the detection assembly 2 may further include a second camera 23. The second camera 23 is adapted to face the detection area, and the second camera 23 is perpendicularly arranged with respect to the detection area. The second camera 23 is used to collect the external image of the detection area.

[0060] In some specific embodiments, the second camera 23 is a CCD camera or the like.

[0061] Specifically, after the first camera 22 completes the acquisition of the internal image of the detection area, the second camera 23 acquires the external image of the detection area. The inspector can confirm whether there are external defects in the detection area by viewing the external image, thereby achieving the technical effect of detecting external defects of the photovoltaic cell 5.

[0062] In some specific embodiments, the external defects may be scratches, residual colloid, etc.

[0063] Refer to Figure 4 , in some embodiments of the present application, the photovoltaic cell detection device 100 may further include: a darkroom 4. The darkroom 4 defines a detection space 41. The mounting rack 1 is disposed in the darkroom 4. A plurality of light-emitting elements 42 and a plurality of diffuser plates 43 are disposed in the darkroom 4. The plurality of light-emitting elements 42 and the plurality of diffuser plates 43 are both spaced apart along the radial direction of the mounting rack 1, and the plurality of light-emitting elements 42 and the plurality of diffuser plates 43 are arranged in one-to-one correspondence. The diffuser plate 43 is opposite to both the light-emitting element 42 and the photovoltaic cell 5. The light-emitting element 42 is used to emit illumination light to the diffuser plate 43, and the diffuser plate 43 is used to reflect the illumination light to the photovoltaic cell 5.

[0064] Specifically, when the photovoltaic cell 5 is directly illuminated by natural light in the external environment or the light-emitting element 42, there are bright areas and dark areas on the photovoltaic cell 5 during illumination by natural light or the light-emitting element 42, resulting in bright areas and dark areas in the external image. The uneven brightness of the external image increases the difficulty for the inspector to view the external image.

[0065] By isolating the light in the external environment through the darkroom 4, and each of the plurality of light-emitting elements 42 emits illumination light toward the corresponding diffuser plate 43, and then the diffuser plate 43 reflects the illumination light to the outer surface of the photovoltaic cell 5, so that the outer surface of the photovoltaic cell 5 is evenly illuminated by the illumination light reflected by the diffuser plate 43, thereby improving the brightness uniformity of the external image, improving the imaging quality of the external image, and further reducing the difficulty for the inspector to view the external image.

[0066] In some specific embodiments, a plurality of light-emitting elements 42 and a plurality of diffuser plates 43 are both disposed at the upper end portion and the lower end portion of the darkroom 4. The plurality of diffuser plates 43 are all disposed around the outside of the photovoltaic cell 5, and the illumination light emitting end of the light-emitting element 42 faces away from the photovoltaic cell 5. The plurality of light-emitting elements 42 and the plurality of diffuser plates 43 at the upper end portion of the darkroom 4 illuminate the upper surface of the photovoltaic cell 5, and the plurality of light-emitting elements 42 and the plurality of diffuser plates 43 at the lower end portion of the darkroom 4 illuminate the lower surface of the photovoltaic cell 5, thereby achieving the technical effect that each area of the photovoltaic cell 5 can be evenly illuminated.

[0067] Refer to Figures 1-3, in some embodiments of the present application, a low-pass filter 231 is provided at the receiving end of the second camera 23. Specifically, when both the first camera 22 and the second camera 23 are operating simultaneously, the radiation light released by the ions in the detection area to the external environment is received by the second camera 23. The radiation light will interfere with the second camera 23 to collect the external image of the detection area. By providing a low-pass filter 231 at the receiving end of the second camera 23, the low-pass filter 231 is used to filter the radiation light, so as to prevent the radiation light from interfering with the second camera 23 to collect the external image of the detection area, and thus the imaging quality of the external image can be improved. And by setting the first camera 22 and the second camera 23 in this way, they can operate simultaneously, so as to improve the detection efficiency of the photovoltaic cell detection device 100.

[0068] Referring to Figure 1 , in some embodiments of the present application, there are multiple second cameras 23, and the multiple second cameras 23 are arranged at intervals in the radial direction of the mounting frame 1. Specifically, when there are multiple detection areas, the multiple second cameras 23 are arranged in one-to-one correspondence with the multiple detection areas. By simultaneously collecting the external images of the corresponding detection areas by the multiple second cameras 23, the detection time of the photovoltaic cell 5 can be reduced, and thus the detection efficiency of the photovoltaic cell 5 can be improved.

[0069] Furthermore, the multiple second cameras 23 can all be communicatively connected to the controller, and the controller is used to sequentially splice the external images collected by the multiple second cameras 23. In some specific embodiments, the controller can sequentially splice the external images collected by the multiple second cameras 23 according to the arrangement order of the detection areas.

[0070] In some specific embodiments, the multiple second cameras 23 can be arranged at intervals in the first direction of the mounting frame 1. In some other specific embodiments, the multiple second cameras 23 can be arranged at intervals in the second direction of the mounting frame 1.

[0071] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A photovoltaic cell detection device, characterized in that: include: A mounting frame (1), a photovoltaic cell (5) being suitable for being placed on the mounting frame (1), and the photovoltaic cell (5) having a detection area; A detection component (2), wherein the detection component (2) is arranged on the mounting frame (1), and the detection component (2) comprises a laser emitting element (21) and a first camera (22), wherein the laser emitting element (21) and the first camera (22) are both suitable for being opposite to the detection area, and the laser emitting element (21) and the first camera (22) are both arranged perpendicular to the detection area, the laser emitting element (21) is used for emitting detection light of a preset wavelength to the detection area, and the first camera (22) is used for collecting an internal image of the detection area.

2. A photovoltaic cell detection device according to claim 1, characterized in that: The invention also comprises: a conveyor belt (3), wherein the conveyor belt (3) is pivotally mounted on the mounting frame (1), the photovoltaic cell (5) is suitable for being placed on the conveyor belt (3), and when the conveyor belt (3) is driven, the photovoltaic cell (5) is transported along a first direction of the mounting frame (1), there are a plurality of detection areas, and the plurality of detection areas are arranged in sequence along the first direction of the photovoltaic cell (5), and the detection component (2) detects the plurality of detection areas in sequence.

3. A photovoltaic cell detection device according to claim 2, characterized in that: Also includes: A controller is connected in communication with the first camera (22), and is used to sequentially stitch together the plurality of internal images captured by the first camera (22).

4. A photovoltaic cell detection device according to claim 2, characterized in that: There are multiple laser emitting elements (21) and multiple first cameras (22), and the multiple laser emitting elements (21) and multiple first cameras (22) are arranged at intervals along the second direction of the mounting frame (1), and the multiple laser emitting elements (21) and multiple first cameras (22) are arranged in a one-to-one correspondence.

5. A photovoltaic cell detection device according to claim 1, characterized in that: There are two detection assemblies (2), and the two detection assemblies (2) are arranged spaced apart along the height direction of the mounting frame (1), and the photovoltaic cell (5) is located between the two detection assemblies (2).

6. A photovoltaic cell detection device according to claim 1, characterized in that: A high-pass filter (221) is provided at the receiving end of the first camera (22).

7. A photovoltaic cell detection device according to claim 1, characterized in that: The detection component (2) further comprises a second camera (23), wherein the second camera (23) is adapted to be opposite to the detection area and the second camera (23) is arranged perpendicular to the detection area, and the second camera (23) is used to collect an external image of the detection area.

8. A photovoltaic cell detection device according to claim 7, characterized in that: Also includes: A darkroom (4), wherein the darkroom (4) defines a detection space (41), wherein the mounting frame (1) is disposed in the darkroom (4), wherein a plurality of light-emitting components (42) and a plurality of diffuse reflection plates (43) are disposed in the darkroom (4), wherein the plurality of light-emitting components (42) and the plurality of diffuse reflection plates (43) are spaced apart along a radial direction of the mounting frame (1), and the plurality of light-emitting components (42) and the plurality of diffuse reflection plates (43) are disposed in a one-to-one correspondence, wherein the diffuse reflection plates (43) are opposite to the light-emitting components (42) and the photovoltaic cells (5), wherein the light-emitting components (42) are used to emit illumination light to the diffuse reflection plates (43), and wherein the diffuse reflection plates (43) are used to reflect the illumination light to the photovoltaic cells (5).

9. A photovoltaic cell detection device according to claim 7, characterized in that: The receiving end of the second camera (23) is provided with a low-pass filter (231).

10. A photovoltaic cell detection device according to claim 7, characterized in that: There are a plurality of the second cameras (23), and the plurality of the second cameras (23) are arranged at intervals along the radial direction of the mounting frame (1).

Images