Photovoltaic cell defect detection device

Abstract

An embodiment of the utility model discloses a photovoltaic cell defect detection device, which comprises a line scanning lens, a line scanning camera, a support, a semiconductor laser pumping source and a camera movement mechanism, the line scanning lens is mounted on a bottom plate through a lens support, the support is mounted on one side of the bottom plate, the camera movement mechanism is mounted on the support, and the semiconductor laser pumping source is mounted on the camera movement mechanism. The line scanning camera is installed on the camera movement mechanism and located at the upper end of the line scanning lens, the semiconductor laser pumping source is connected with the line scanning lens, and the line scanning lens, the line scanning camera, the support and the camera movement mechanism are all located above a photovoltaic cell conveying belt.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic module detection technical field, concretely a photovoltaic cell piece defect detection device. BACKGROUND

[0002] Photovoltaic cell, also called solar cell, is a kind of semiconductor device for converting solar energy into electricity directly using photovoltaic effect. With the development of photovoltaic technology, new technology cell piece such as BC cell, 0BB cell and the like is introduced continuously, and the application of traditional EL detection is not easy to pass through the mode of probe to electrify cell piece uniformly, which causes the defect such as broken grid and virtual printing of cell piece in production process to be unable to be detected. CONTENT OF UTILITY MODEL

[0003] The utility model discloses a kind of photovoltaic cell piece defect detection devices to solve the problems raised in the above background, without the electrification contact to cell, the defect problem such as broken grid and virtual printing that grid line printing appears in production link can be positioned quickly and effectively, reliable guarantee is provided for product quality.

[0004] The utility model discloses a kind of photovoltaic cell piece defect detection devices to solve the problems raised in the above background, without the electrification contact to cell, the defect problem such as broken grid and virtual printing that grid line printing appears in production link can be positioned quickly and effectively, reliable guarantee is provided for product quality.

[0005] Photovoltaic cell piece defect detection device, including line scanning lens, line scanning camera, support, semiconductor laser pump source and camera motion mechanism, line scanning lens is installed on bottom plate by lens support, support is installed on the side of bottom plate, camera motion mechanism is installed on support, line scanning camera is installed on camera motion mechanism, line scanning camera is located at the upper end of line scanning lens, semiconductor laser pump source is connected with line scanning lens, line scanning lens, line scanning camera, support and camera motion mechanism are all located above the conveying belt of photovoltaic cell piece.

[0006] Further, the camera motion mechanism includes two manual rotary tables, a rotary table connecting plate, and a camera connecting plate. One of the manual rotary tables is connected to the support, the camera connecting plate is installed on the other manual rotary table, and the rotary table connecting plate connects the two manual rotary tables. The line scanning camera is installed on the camera connecting plate.

[0007] Further, one side of the middle of the bottom plate is provided with a groove, and the two sides of the bottom plate are installed on two aluminum profiles. The aluminum profiles are parallel to the conveying belt of the photovoltaic cell piece.

[0008] Further, the two sides of the bottom plate are provided with two groups of support mounting holes, each group of support mounting holes is provided with three support mounting holes, the support includes a support transverse plate and a support longitudinal plate, the support transverse plate is provided with two parallel support transverse plate mounting grooves, the distance between the two support transverse plate mounting grooves is equal to the distance between the support mounting holes, and one manual rotary table is connected to the four corners on the outer side of the support longitudinal plate through fasteners.

[0009] Further, the rotating table connecting plate comprises a connecting vertical plate and a connecting horizontal plate, and the connecting horizontal plate is connected with the top of the connecting vertical plate.

[0010] Further, the bracket vertical plate is connected with the rotating table base of the manual rotating table, and the rotating scale disc of the manual rotating table is connected with the connecting vertical plate of the rotating table connecting plate.

[0011] The rotating table base of the manual rotating table, on which the camera connecting plate is installed, is installed on the connecting horizontal plate.

[0012] Further, the camera connecting plate comprises a camera connecting vertical plate and a camera connecting horizontal plate, the camera connecting vertical plate is connected with the rotating scale disc, and the line-scan camera is installed on the outer side of the camera connecting vertical plate.

[0013] Further, the bottom plate is provided with three groups of line-scan lens mounting holes, each group of line-scan lens mounting holes is provided with three columns of line-scan lens mounting holes, each column of line-scan lens mounting holes is provided with two line-scan lens mounting holes, the top of the line-scan lens is installed on the lens bracket, the lens bracket is provided with two line-scan lens mounting grooves, and the line-scan lens is installed in the line-scan lens mounting hole through the line-scan lens mounting groove.

[0014] Beneficial effects:

[0015] The utility model uses the semiconductor laser pumping source to emit laser, forms the line strip light spot through the line-scan lens, irradiates the light spot on the photovoltaic cell surface, excites the electron in the photovoltaic cell to the excited state, and the electron flows along the grid line, and when falling back to the ground state, will excite the near-infrared light, and the line-scan camera captures the near-infrared light emitted by the cell, forms the image, and the image can reflect the broken grid and the virtual printing defect of the cell, and the line-scan lens and the line-scan camera can be adjusted, suitable for various cells, and can be adjusted to the appropriate position, and the utility model can detect without contact, and can reduce the damage of contact detection to the cell. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0017] Figure 1 It is the schematic diagram of the utility model;

[0018] Figure 2 It is the schematic diagram of the camera movement mechanism and the bracket connection of the utility model;

[0019] Figure 3 For Figure 2 The schematic view after removing the camera connecting plate;

[0020] Figure 4 The schematic view after removing the camera connecting plate of the camera movement mechanism of the utility model;

[0021] Figure 5 The schematic view from another angle after removing the camera connecting plate of the camera movement mechanism of the utility model;

[0022] Figure 6 For Figure 5 The enlarged schematic view at A in the middle;

[0023] Figure 7 The schematic view from another angle of the utility model;

[0024] Figure 8 The top view of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model.

[0026] As shown in the drawings, the utility model discloses a photovoltaic cell defect detection device, including line sweep lens 1, line sweep camera 2, support 4, semiconductor laser pumping source 5 and camera movement mechanism 6, line sweep lens 1 is installed on the bottom plate 8 through lens support 7, the support 4 is installed on one side of the bottom plate 8, the camera movement mechanism 6 is installed on the support 4, line sweep camera 2 is installed on the camera movement mechanism 6, line sweep camera 3 is located in the upper end of line sweep lens 1, semiconductor laser pumping source 5 is connected with line sweep lens 1, line sweep lens 1, line sweep camera 2, support 4 and camera movement mechanism 6 all are located above the conveying belt of photovoltaic cell 3. The conveying belt is used for transporting photovoltaic cell 3.

[0027] The semiconductor laser pumping source is prior art, and the model of the semiconductor laser pumping source of the utility model selects 808nm 50W semiconductor laser.

[0028] The line sweep camera is 4K line sweep camera, and the model selects PN 4K2GV-30KN4.

[0029] The line sweep lens is prior art, and can also select 808nm linear laser module to replace.

[0030] The utility model discloses a semiconductor laser pumping source is used as trigger light source, after laser irradiation, the ground state electron in battery piece absorbs photon and enters excited state, and active electron will flow along the battery piece printing grid line, diffuses to the non-illumination area, and the electron will return to the ground state from excited state again, and the near-infrared light of wavelength around 1150nm is released.

[0031] In the electron flow process, the broken grid and the ghost printing defect caused by the poor printing will influence the electron flow, the contact resistance is big in the defective area, the electron density is low, and the light released by the electron returning to the ground state from the excited state will be weak.

[0032] The utility model discloses a line-scan camera, captures the near-infrared light of battery piece, presents the bright and dark image, and the broken grid and the ghost printing defect of battery piece can be reflected through the image.

[0033] As Figure 1 And Figure 7 The offset distance between the shooting position of the line-scan camera 2 and the linear light spot irradiation area of the line-scan lens 1 is 1-10mm.

[0034] In an embodiment of the utility model, the camera motion mechanism 6 includes two manual rotating tables 61, a rotating table connecting plate 62 and a camera connecting plate 63, one of the manual rotating tables 61 is connected with the support 4, the camera connecting plate 63 is installed on the other manual rotating table 61, the rotating table connecting plate 62 connects the two manual rotating tables 61, and the line-scan camera 2 is installed on the camera connecting plate 63. The position of the line-scan camera 2 needs to be adjusted sometimes, therefore, the utility model adjusts the position of the line-scan camera 2 through the camera motion mechanism 6. Specifically, the position is adjusted through the two manual rotating tables 61. One of the manual rotating tables 61 adjusts the angle of the other manual rotating table 61, and the second manual rotating table 61 directly adjusts the line-scan camera.

[0035] In an embodiment of the utility model, the middle side of the bottom plate 8 is provided with a groove 81, the two sides of the bottom plate 8 are installed on the two aluminum profiles 9, and the aluminum profiles 9 are parallel with the conveying belt of the photovoltaic battery piece 3. The groove 81 is used for avoiding the line-scan camera 2 and the line-scan lens 1.

[0036] In an embodiment of the utility model, the two sides of the bottom plate 8 are provided with two groups of support mounting holes 82, each group of support mounting holes 82 is provided with three, the support 4 includes a support horizontal plate 41 and a support vertical plate 42, the support horizontal plate 41 is provided with two parallel support horizontal plate mounting grooves 411, the interval of the two support horizontal plate mounting grooves 411 is equal to the interval of the support mounting holes 82, and the four corners of the outside of the support vertical plate 52 are connected with fasteners.

[0037] In an embodiment of the utility model, the rotary table connecting plate 62 includes a connecting vertical plate 621 and a connecting horizontal plate 622, and the connecting horizontal plate 622 is connected with the top of the connecting vertical plate 621. The rotary table connecting plate 62 is used for connecting two manual rotary tables 61.

[0038] In an embodiment of the utility model, the support vertical plate 42 is connected with the rotary table base 611 of the manual rotary table 61, and the rotary scale disc 612 of the manual rotary table is connected with the connecting vertical plate 621 of the rotary table connecting plate; the rotary table base 611 is in a fixed state, and the rotary scale disc 612 can be manually adjusted to rotate.

[0039] The rotary table base 611 of the manual rotary table, on which the camera connecting plate 63 is installed, is installed on the connecting horizontal plate 622, and the camera connecting plate 63 is installed on the rotary scale disc 612 of the manual rotary table.

[0040] In an embodiment of the utility model, the camera connecting plate 63 includes a camera connecting vertical plate 631 and a camera connecting horizontal plate 632, the camera connecting vertical plate 631 is connected with the rotary scale disc 612, and the line-scan camera 2 is installed on the outer side of the camera connecting vertical plate 631. The rotary scale disc 612 drives the camera connecting plate 63 to rotate.

[0041] In an embodiment of the utility model, the bottom plate 8 is provided with three groups of line-scan lens mounting holes 83 on one side of the groove, each group of line-scan lens mounting holes 83 is provided with three columns of line-scan lens mounting holes, each column of line-scan lens mounting holes is provided with two line-scan lens mounting holes, the top of the line-scan lens 1 is installed on the lens support 7, the lens support 7 is provided with two line-scan lens mounting grooves 71, the line-scan lens 1 is installed in the line-scan lens mounting hole through the line-scan lens mounting groove 71, and the position of the line-scan lens 1 can be finely adjusted due to the design of the line-scan lens mounting groove 71. The front and back directions of the line-scan lens 1 are realized by adjusting the connection positions of the line-scan lens mounting groove 71 and the line-scan lens mounting hole, and the left and right positions of the line-scan lens 1 are realized by selecting the line-scan lens mounting hole 83.

[0042] The above description of the disclosed embodiments enables those skilled in the art to carry out or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Apparatus for detecting defects in a photovoltaic cell, characterized in that, The line scanning lens, the line scanning camera, the support, the semiconductor laser pumping source and the camera motion mechanism are included, the line scanning lens is installed on the bottom plate through the lens support, the support is installed on one side of the bottom plate, the camera motion mechanism is installed on the support, the line scanning camera is installed on the camera motion mechanism, the line scanning camera is located at the upper end of the line scanning lens, the semiconductor laser pumping source is connected with the line scanning lens, and the line scanning lens, the line scanning camera, the support and the camera motion mechanism are located above the conveying belt of the photovoltaic cell piece.

2. The photovoltaic cell defect detection apparatus of claim 1, wherein The camera motion mechanism includes two manual rotary tables, a rotary table connecting plate and a camera connecting plate, one of the manual rotary tables is connected with the support, the camera connecting plate is installed on the other manual rotary table, the rotary table connecting plate connects the two manual rotary tables, and the line scanning camera is installed on the camera connecting plate.

3. The photovoltaic cell defect detection apparatus of claim 2, wherein One side of the middle of the bottom plate is provided with a groove, and the two sides of the bottom plate are installed on two aluminum profiles which are parallel to the conveying belt of the photovoltaic cell piece.

4. The photovoltaic cell defect detection apparatus of claim 3, wherein, The two sides of the bottom plate are provided with two groups of support mounting holes, each group of support mounting holes is provided with three support mounting holes, the support includes a support transverse plate and a support longitudinal plate, two parallel support transverse plate mounting grooves are arranged on the support transverse plate, the distance between the two support transverse plate mounting grooves is equal to the distance between the support mounting holes, and one manual rotary table is connected with the four corners of the outer side of the support longitudinal plate through fasteners.

5. The photovoltaic cell defect detection apparatus of claim 4, wherein, The rotary table connecting plate includes a connecting longitudinal plate and a connecting transverse plate, and the connecting transverse plate is connected with the top of the connecting longitudinal plate.

6. The photovoltaic cell defect detection apparatus of claim 5, wherein, The support longitudinal plate is connected with the rotary table base of the manual rotary table, and the rotary scale disc of the manual rotary table is connected with the connecting longitudinal plate of the rotary table connecting plate. The rotary table base of the manual rotary table on which the camera connecting plate is installed is installed on the connecting transverse plate, and the camera connecting plate is installed on the rotary scale disc of the manual rotary table.

7. The photovoltaic cell defect detection apparatus of claim 6, wherein, The camera connecting plate includes a camera connecting longitudinal plate and a camera connecting transverse plate, the camera connecting longitudinal plate is connected with the rotary scale disc, and the line scanning camera is installed on the outer side of the camera connecting longitudinal plate.

8. The photovoltaic cell defect detection apparatus of claim 3, wherein, The side of the bottom plate provided with the groove is provided with three groups of line scanning lens mounting holes, each group of line scanning lens mounting holes is provided with three rows of line scanning lens mounting holes, each row of line scanning lens mounting holes is provided with two line scanning lens mounting holes, the top of the line scanning lens is installed on the lens support, the lens support is provided with two line scanning lens mounting grooves, and the line scanning lens is installed in the line scanning lens mounting hole through the line scanning lens mounting groove.

Images