Electroluminescence detection circuit and detection device of perovskite laminated photovoltaic module

Abstract

The utility model discloses an electroluminescence detection circuit and a detection device of a perovskite laminated photovoltaic module. The electroluminescent detection device of the perovskite laminated photovoltaic module comprises a detection camera obscura, a power supply module, a camera, an image processing module and an image analysis module, a detection darkroom for detecting the perovskite / crystalline silicon laminated photovoltaic module is arranged in the detection camera obscura, and the camera is arranged in the darkroom. The power supply module is used for applying excitation voltage / current to the perovskite / crystalline silicon laminated photovoltaic module, the image processing module is connected with the camera, and the image analysis module is connected with the image processing module. According to the technical scheme of the utility model, through the arrangement of the switchable change-over switch, the connection of the power supply / perovskite cell and the power supply / crystalline silicon cell can be controlled respectively, and the perovskite / crystalline silicon laminated photovoltaic assembly of a four-end / two-end parallel structure after lamination and before the junction box is installed can be photographed. The problem that two cameras with different functions inevitably interfere with each other in the using process is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a perovskite laminated photovoltaic module electroluminescence detection circuit and detection device especially, belongs to solar cell technical field. BACKGROUND

[0002] The theoretical limit efficiency of crystalline silicon cell is 29.4%, and the actual theoretical efficiency is only 27.1% after considering the actual possible loss of optics and electricity, and the efficiency improvement space is limited.Perovskite has developed rapidly in recent years, has the advantages such as band gap adjustable, simple process, is suitable for being the top cell absorbing layer material of laminated cell.Perovskite / silicon heterojunction laminated common structure has four ends (two sets of different power generation systems), two ends in series and two ends in parallel etc.In laminated solar cell, the effective optical absorption layer of perovskite material as top electrode mainly absorbs light in the range of 300nm-800nm, and the corresponding emission spectrum range is about 700nm-800nm;Crystalline silicon (c-Si) as the optical absorption layer of bottom cell mainly absorbs light in the range of 800nm-1200nm, and the corresponding emission spectrum range is about 1000nm-1200nm.Therefore, by combining crystalline silicon and perovskite, the theoretical efficiency limit of crystalline silicon cell can be broken through, and the power generation efficiency of module is improved.The latest report shows that the perovskite / silicon laminated efficiency has reached 33.9%, and the power generation efficiency of solar module is significantly improved.

[0003] The most commonly used detection and analysis of crystalline silicon module at present is electroluminescence (Electroluminescence, EL) imaging, and electroluminescence, as a non-destructive and high-sensitivity analysis method, has been maturely applied in the detection field of impurity and defect distribution of crystalline silicon cell, can be perfectly copied and applied to the detection of perovskite / crystalline silicon laminated module cell, and has also been applied in a small amount in the field of perovskite battery module, but for laminated battery, especially large-area module with four ends and two ends in parallel structure, the current technology can only be applied to crystalline silicon cell or perovskite cell for separate imaging and shooting.Two cameras with different filters are used to collect the images of perovskite and crystalline silicon cells respectively, but electroluminescence test is generally static test, and in large-area application, the two cameras with different functions will inevitably interfere with each other in the use process, and the equipment cost is high, and there is no corresponding technology to shoot the electroluminescence images of perovskite cell and crystalline silicon cell in laminated module. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a perovskite laminated photovoltaic module electroluminescence detection circuit and detection device to overcome the deficiencies in the prior art.

[0005] To realize the foregoing utility model purposes, the utility model adopts the technical scheme including:

[0006] The first aspect of the embodiment of the utility model provides a kind of electroluminescence detection circuit for perovskite laminated photovoltaic module, the perovskite laminated photovoltaic module has the perovskite cell and first thin-film photovoltaic cell of layering, and the electroluminescence detection circuit includes:

[0007] Power supply module and switching device, the switching device is connected with the power supply module, the perovskite cell and the first thin-film photovoltaic cell, the power supply module, the switching device, the perovskite cell are configured as first detection circuit, and the power supply module, the switching device, the first thin-film photovoltaic cell are configured as second detection circuit;

[0008] When the switching device is turned on the power supply module and the perovskite cell, the first detection circuit is turned on, and the second detection circuit is disconnected, the power supply module supplies power to the perovskite cell, and the perovskite cell emits first excitation light;When the switching device is turned on the power supply module and the first thin-film photovoltaic cell, the first detection circuit is disconnected, and the second detection circuit is turned on, the power supply module supplies power to the first thin-film photovoltaic cell, and the first thin-film photovoltaic cell emits second excitation light.

[0009] In a more specific embodiment, the switching device includes a three-terminal switch, the three-terminal switch has a moving contact, a first stationary contact, a second stationary contact, the moving contact is electrically connected with the power supply module, the first stationary contact is electrically connected with the perovskite cell, and the second stationary contact is electrically connected with the first thin-film photovoltaic cell, the moving contact is controllably electrically connected with the first stationary contact or the second stationary contact, when the moving contact is electrically connected with the first stationary contact, the first detection circuit is turned on, and when the moving contact is electrically connected with the second stationary contact, the second detection circuit is turned on.

[0010] In another more specific embodiment, the switching device includes a first switch and a second switch, the power supply module is electrically connected with the perovskite cell through the first switch, and the power supply module, the first switch and the perovskite cell are configured as the first detection circuit, and the power supply module is electrically connected with the first thin-film photovoltaic cell through the second switch, and the power supply module, the second switch and the first thin-film photovoltaic cell are configured as the second detection circuit.

[0011] Further, the perovskite cell can absorb third excitation light, and the third excitation light has a first waveband;The second excitation light has a second waveband, and the first waveband and the second waveband have no intersection.

[0012] Further, the second excitation light can be transmitted through the perovskite cell.

[0013] Further, the first thin-film photovoltaic cell comprises a crystalline silicon cell.

[0014] Further, the power supply module comprises a voltage source or a current source, the voltage source provides an excitation voltage of 0-300V, and the current source provides an excitation current of 0-5A.

[0015] A second aspect of the embodiment of the utility model provides a detection device for perovskite laminated photovoltaic module, the perovskite laminated photovoltaic module has the perovskite cell and first thin-film photovoltaic cell of layering, the detection device includes:

[0016] Detection darkroom is used to provide the dark environment required for detecting the perovskite laminated photovoltaic module;

[0017] The carrier is arranged in the detection darkroom and is used to carry the perovskite laminated photovoltaic module;

[0018] The power supply module is coupled to the perovskite cell and the first thin-film photovoltaic cell, the power supply module is configured as a first detection circuit with the perovskite cell, the power supply module is configured as a second detection circuit with the first thin-film photovoltaic cell, and the power supply module can be switched between a first state and a second state;

[0019] When the power supply module is in the first state, the first detection circuit is turned on, the second detection circuit is turned off, the power supply module supplies power to the perovskite cell, and the perovskite cell generates first excitation light;When the power supply module is in the second state, the first detection circuit is turned off, the second detection circuit is turned on, the power supply module supplies power to the first thin-film photovoltaic cell, and the first thin-film photovoltaic cell generates second excitation light, which can pass through the perovskite cell;

[0020] The image acquisition module is arranged in the detection darkroom, the image acquisition module is arranged above the carrier, the image acquisition module can generate a first image according to the first excitation light, and the image acquisition module can generate a second image according to the second excitation light.

[0021] Further, the power supply module comprises a power source and a change-over switch, the change-over switch has a moving contact and a first stationary contact and a second stationary contact, the power source is electrically connected to the moving contact, the first stationary contact is electrically connected to the electrode of the perovskite cell, the second stationary contact is electrically connected to the electrode of the first thin-film photovoltaic cell, and the moving contact can be adjustably electrically connected to the first stationary contact or the second stationary contact, so that the power supply module can be switched between the first state and the second state.

[0022] Further, the power supply comprises a voltage source or a current source, the voltage source provides an excitation voltage of 0-300V, and the current source provides an excitation current of 0-5A.

[0023] Further, the first static contact and the second static contact comprise a metal probe group, which is electrically connected with the positive electrode and the negative electrode of the perovskite battery or the first thin-film photovoltaic cell.

[0024] Further, the metal probe group is arranged on the loading platform.

[0025] Further, the detection darkroom is arranged in a detection dark box, and the detection dark box is provided with an openable and closable box door.

[0026] Further, the loading platform is movably connected with the detection dark box and can move in the detection darkroom.

[0027] Further, the image acquisition module comprises one or more cameras, and the plurality of cameras are equidistantly arranged on the same horizontal plane.

[0028] Further, the camera is provided with a high-pass filter with a wavelength of 700-800nm.

[0029] In a more specific embodiment, the detection device for the perovskite laminated photovoltaic module further comprises an image analysis module, which is coupled with the image acquisition module, and is used to acquire the first image and the second image and perform image analysis on the first image and the second image to obtain the thin-film uniformity evaluation result and the defect evaluation result of the perovskite battery and the first thin-film photovoltaic cell.

[0030] A third aspect of the embodiment of the utility model provides a kind of electroluminescence detection device for perovskite laminated photovoltaic module, the perovskite laminated photovoltaic module has the perovskite battery and first thin-film photovoltaic cell of laminated, and the electroluminescence detection device comprises:

[0031] Power supply module, for respectively in first time period, second time period to the perovskite battery of perovskite laminated photovoltaic module to be detected and first thin-film photovoltaic cell power supply, to make the perovskite battery be excited to generate first excitation light in first time period, the first thin-film photovoltaic cell be excited to generate second excitation light in second time period;

[0032] Image acquisition module, for collecting the first excitation light and obtaining the electroluminescence image of the perovskite battery in first time period, and collecting the second excitation light and obtaining the electroluminescence image of the first thin-film photovoltaic cell in second time period.

[0033] Further, the power supply module has a change-over switch, the change-over switch is capable of switching between a first working state and a second working state, and the change-over switch is in the first working state in a first time period and in the second working state in a second time period;

[0034] When the change-over switch is in the first working state, the circuit between the power supply module and the perovskite cell is a passageway, and the circuit between the power supply module and the first thin-film photovoltaic cell is a break, the perovskite cell is excited by the excitation voltage or current to generate first excitation light, and the first excitation light is collected by the image acquisition module and forms an electroluminescent image of the perovskite cell.

[0035] When the change-over switch is in the second working state, the circuit between the power supply module and the first thin-film photovoltaic cell is a passageway, and the circuit between the power supply module and the perovskite cell is a break, the first thin-film photovoltaic cell is excited by the excitation voltage or current to generate second excitation light, and the second excitation light is collected by the image acquisition module and forms an electroluminescent image of the first thin-film photovoltaic cell.

[0036] Further, the power supply module includes a power supply and a change-over switch, the change-over switch includes a three-terminal switch, the three-terminal switch has a moving contact, a first stationary contact and a second stationary contact, the moving contact is electrically connected with the power supply, the first stationary contact is electrically connected with the perovskite cell, and the second stationary contact is electrically connected with the first thin-film photovoltaic cell, and the moving contact is controllably electrically connected with the first stationary contact or the second stationary contact; or the change-over switch includes a first switch and a second switch, the power supply is electrically connected with the perovskite cell through the first switch, and the power supply is electrically connected with the first thin-film photovoltaic cell through the second switch.

[0037] Further, the excitation voltage provided by the power supply is 0-300V, and the excitation current is 0-5A.

[0038] Further, the image acquisition module includes one or more cameras, and the camera has a high-pass filter of 700-800nm.

[0039] Further, the plurality of cameras are equidistantly distributed in the same horizontal plane.

[0040] Further, the electroluminescent detection device for the perovskite laminated photovoltaic module further includes a detection darkroom, the detection darkroom is used for providing a light-proof test environment required for electroluminescent detection, and the image acquisition module is arranged in the detection darkroom.

[0041] Compared with the prior art, the advantages of the present application include:

[0042] The embodiment of the utility model provides a kind of perovskite laminated photovoltaic module's electroluminescence detection device / method, by setting switchable change-over switch, respectively control power supply / perovskite battery and power supply / crystalline silicon battery connection, to the four-end / two-end parallel structure perovskite / crystalline silicon laminated photovoltaic module after lamination but before mounting junction box is photographed, solve the problem of mutual interference of two different function cameras in use process, simultaneously, when detecting, perovskite laminated photovoltaic module does not need to be turned over, and, can be according to electroluminescence image and the defect of perovskite / crystalline silicon battery respectively determine analysis. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 It is the state structure schematic diagram when camera is used to take photograph imaging for perovskite laminated photovoltaic module in darkroom in a typical embodiment case of the utility model;

[0044] Figure 2 It is the structure schematic diagram for perovskite laminated photovoltaic module and power supply module connection switching in a typical embodiment case of the utility model;

[0045] Figure 3 It is the circuit structure schematic diagram for perovskite laminated photovoltaic module and power supply module coupling and when power supply module is in first state in a typical embodiment case of the application;

[0046] Figure 4 It is the circuit structure schematic diagram for perovskite laminated photovoltaic module and power supply module coupling and when power supply module is in second state in a typical embodiment case of the application;

[0047] Figure 5 It is the circuit structure schematic diagram for perovskite laminated photovoltaic module and power supply module coupling and when power supply module is in first state in a typical embodiment case of the application;

[0048] Figure 6 It is the circuit structure schematic diagram for perovskite laminated photovoltaic module and power supply module coupling and when power supply module is in second state in a typical embodiment case of the application;

[0049] Figure 7 、 Figure 8 It is the electroluminescence digital image of crystalline silicon battery, perovskite battery obtained in a typical embodiment case of the utility model. DETAILED DESCRIPTION

[0050] In view of the deficiencies in the prior art, the present inventors have long studied and practiced to come up with the technical solution of the utility model. The technical solution, its implementation process and principles will be further explained as follows.

[0051] The power supply, the change-over switch, the camera, the image processing system and the like used in the embodiments of the present application can be known in the art, and the specific structure, model and the like are not limited herein.

[0052] Embodiment 1

[0053] Please refer to Figure 1 and Figure 2 , an electroluminescence detection circuit for a perovskite tandem photovoltaic module, the perovskite tandem photovoltaic module having a perovskite cell 510 and a first thin-film photovoltaic cell 520 stacked, the electroluminescence detection circuit comprising:

[0054] a power supply module 300 and a switching device 320, the switching device 320 being coupled to the power supply module 300, the perovskite cell 510 and the first thin-film photovoltaic cell 520, the power supply module 300, the switching device 320, the perovskite cell 510 being configured as a first detection circuit, the power supply module 300, the switching device 320, the first thin-film photovoltaic cell 520 being configured as a second detection circuit;

[0055] When the switching device 320 is turned on to supply power to the power supply module 300 and the perovskite cell 510, the first detection circuit is turned on, the second detection circuit is turned off, the power supply module 300 supplies power to the perovskite cell 510, and the perovskite cell 510 emits first excitation light; when the switching device 320 is turned on to supply power to the power supply module 300 and the first thin-film photovoltaic cell 520, the first detection circuit is turned off, the second detection circuit is turned on, the power supply module 300 supplies power to the first thin-film photovoltaic cell 520, and the first thin-film photovoltaic cell 520 emits second excitation light.

[0056] In a more specific embodiment, as shown in Figure 3 and Figure 4 , the switching device 320 can include a three-terminal switch, the three-terminal switch having a moving contact 321, a first stationary contact 322 and a second stationary contact 323, the moving contact 321 being electrically connected to the power supply module 300, the first stationary contact 322 being electrically connected to the perovskite cell 510, the second stationary contact 323 being electrically connected to the first thin-film photovoltaic cell 520, the moving contact 321 being controllably electrically connected to the first stationary contact 322 or the second stationary contact 323, when the moving contact 321 is electrically connected to the first stationary contact 322, as shown in Figure 3 , the first detection circuit is turned on, the power supply module 300 supplies power to the perovskite cell 510, and the perovskite cell 510 is excited by the excitation voltage or current to generate first excitation light, when the moving contact 321 is electrically connected to the second stationary contact 323, as shown in Figure 4As shown, the second detection circuit is turned on, the power supply module 300 supplies power to the first thin-film photovoltaic cell 520, and the first thin-film photovoltaic cell 520 is excited by the excitation voltage or current to generate second excitation light. Exemplarily, the electric input end 321, the first electric output end 322, and the second electric output end 323 can be a metal probe group or the like, and the specific structure and product model of the three-terminal switch are not limited herein, which can be any three-terminal switch capable of achieving the above functions

[0057] In another more specific embodiment, the switch device 320 can further include a first switch 324 and a second switch 325. The power supply module 300 is electrically connected to the perovskite cell 510 through the first switch 324, and the power supply module 300, the first switch 324, and the perovskite cell 510 are configured as a first detection circuit. The power supply module 300 is electrically connected to the first thin-film photovoltaic cell 520 through the second switch 325, and the power supply module 300, the second switch 325, and the first thin-film photovoltaic cell 520 are configured as a second detection circuit. When the first switch 324 is closed and the second switch 325 is opened, as shown in FIG. 4A, Figure 5 As shown, the first detection circuit is turned on, the power supply module 300 supplies power to the perovskite cell 510, and the perovskite cell 510 is excited by the excitation voltage or current to generate first excitation light. When the first switch 324 is opened and the second switch 325 is closed, as shown in FIG. 4B, Figure 6 As shown, the second detection circuit is turned on, the power supply module 300 supplies power to the first thin-film photovoltaic cell 520, and the first thin-film photovoltaic cell 520 is excited by the excitation voltage or current to generate second excitation light. It should be noted that the first switch 324 and the second switch 325 can be known in the art, which can be obtained by purchase, and the specific structure and product model thereof are not limited herein.

[0058] In this embodiment, the perovskite cell 510 can absorb third excitation light, the third excitation light has a first waveband; the second excitation light has a second waveband, the first waveband and the second waveband have no intersection, and the second excitation light can pass through the perovskite cell 510. Exemplarily, the first thin-film photovoltaic cell 520 includes a crystalline silicon cell.

[0059] It should be noted that the first thin-film photovoltaic cell 520 can be a crystalline silicon (c-Si) cell. In the perovskite / crystalline silicon stacked solar cell, the perovskite cell 510 serves as an effective optical absorption layer of the top cell to absorb light with a wavelength of 300-800 nm, and the corresponding emission spectrum range is 700-800 nm; the crystalline silicon cell serves as an optical absorption layer of the bottom cell to mainly absorb light with a wavelength of 800-1200 nm, and the corresponding emission spectrum range is about 1000-1200 nm. Therefore, the light emitted by the bottom first thin-film photovoltaic cell 520 under electrical excitation will not be absorbed by the top perovskite, so that the perovskite cell 510 and the first thin-film photovoltaic cell 520 can be separately powered after lamination of the perovskite / crystalline silicon stacked solar cell and before connection of the junction box, and the electroluminescence images of the perovskite cell 510 and the first thin-film photovoltaic cell 520 can be collected using the same image collection module 400 without flipping the perovskite / crystalline silicon stacked solar cell.

[0060] Specifically, since the spectrum range collected by the image collection module 400 covers the emission spectrum of the perovskite cell 510 and the emission spectrum of the first thin-film photovoltaic cell 520, the same image collection module 400 is used to collect the number of photons emitted by the perovskite cell 510 and the first thin-film photovoltaic cell 520 after being excited by electricity to form images, which is used for auxiliary analysis, so as to realize the collection and analysis of the electroluminescence images of the perovskite cell 510 and the first thin-film photovoltaic cell 520, and solve the problem of mutual interference of multiple cameras with different functions on the same horizontal plane; and the emission light of the bottom first thin-film photovoltaic cell 520 after being excited by electricity is not absorbed by the top perovskite film layer, so that the electroluminescence images of the perovskite cell 510 and the first thin-film photovoltaic cell 520 can be collected simultaneously without the need to set a flipping assembly to flip the perovskite / crystalline silicon stacked solar cell.

[0061] In the embodiment, the power supply module 300 includes a voltage source or a current source. The voltage source provides an excitation voltage of 0-300 V, and the current source provides an excitation current of 0-5 A.

[0062] In the embodiment, the electroluminescence detection circuit for the perovskite tandem photovoltaic module further comprises an image acquisition module 400. The image acquisition module 400 can generate a first image according to the first excitation light, and the image acquisition module 400 can generate a second image according to the second excitation light. Specifically, the image acquisition module 400 can comprise one or more cameras, and the camera has a high-pass filter of 700 nm to 800 nm. It should be noted that when a plurality of cameras are used, the plurality of cameras are distributed equidistantly in the same horizontal plane. For example, the camera can be an industrial camera, and the pixel / resolution configuration of the camera can be selected according to specific requirements, which is not limited herein. The size of the high-pass filter can be selected according to different resolution requirements.

[0063] Embodiment 2

[0064] Please refer to Figure 1 and Figure 2 A detection device for a perovskite tandem photovoltaic module, the perovskite tandem photovoltaic module has a stacked perovskite cell 510 and a first thin-film photovoltaic cell 520, and the detection device comprises:

[0065] A detection darkroom 110 for providing a dark environment required for detecting the perovskite tandem photovoltaic module;

[0066] A carrier 200, which is arranged in the detection darkroom 110 and is used for carrying the perovskite tandem photovoltaic module;

[0067] A power supply module 300, which is coupled to the perovskite cell 510 and the first thin-film photovoltaic cell 520. The power supply module 300 and the perovskite cell 510 are configured as a first detection circuit, and the power supply module 300 and the first thin-film photovoltaic cell 520 are configured as a second detection circuit. The power supply module 300 can be switched between a first state and a second state;

[0068] When the power supply module 300 is in the first state, the first detection circuit is turned on, the second detection circuit is turned off, the power supply module 300 supplies power to the perovskite cell 510, and the perovskite cell 510 generates first excitation light. When the power supply module 300 is in the second state, the first detection circuit is turned off, the second detection circuit is turned on, the power supply module 300 supplies power to the first thin-film photovoltaic cell 520, and the first thin-film photovoltaic cell 520 generates second excitation light. The second excitation light can pass through the perovskite cell 510;

[0069] An image acquisition module 400, which is arranged in the detection darkroom 110 and is arranged above the carrier 200. The image acquisition module 400 can generate a first image according to the first excitation light, and the image acquisition module 400 can generate a second image according to the second excitation light.

[0070] As one of the embodiments, the power supply module 300 comprises a power supply 310 and a change-over switch, the change-over switch has a moving contact 321 and a first stationary contact 322, a second stationary contact 323, the power supply 310 is electrically connected with the moving contact 321, the first stationary contact 322 is electrically connected with the electrode of the perovskite battery 510, the second stationary contact 323 is electrically connected with the electrode of the first thin-film photovoltaic cell 520, the moving contact 321 can be adjustably electrically connected with the first stationary contact 322 or the second stationary contact 323, so as to switch the power supply module 300 between the first state and the second state. Specifically, when the moving contact 321 is electrically connected with the first stationary contact 322, the power supply module 300 is in the first state, as shown in Figure 3 ; when the moving contact 321 is electrically connected with the second stationary contact 323, the power supply module 300 is in the second state, as shown in Figure 4 . For example, the moving contact 321, the first stationary contact 322 and the second stationary contact 323 can be a metal probe group, which is electrically connected with the positive electrode and the negative electrode of the perovskite battery 510 or the first thin-film photovoltaic cell 520. The specific structure and product model of the three-terminal switch are not limited herein, which can be any three-terminal switch capable of achieving the above functions.

[0071] As one of the embodiments, please refer to Figure 5 and Figure 6 , the power supply module 300 comprises a power supply 310 and a change-over switch 320, the change-over switch 320 comprises a first switch 324 and a second switch 325 which are independently arranged, the power supply 310 is electrically connected with the perovskite battery 510 through the first switch 324, and the power supply 310 is electrically connected with the first thin-film photovoltaic cell 520 through the second switch 325; when the first switch 324 is closed and the second switch 325 is opened, the power supply module 300 is in the first state, as shown in Figure 5 ; when the first switch 324 is opened and the second switch 325 is closed, the power supply module 300 is in the second state, as shown in Figure 6 . It should be noted that the first switch 324 and the second switch 325 can be known in the art, which can be obtained by market purchase, and the specific structure and product model are not limited herein.

[0072] For example, the excitation voltage provided by the power supply 310 is 0-300V, and the excitation current is 0-5A. It can be understood that the power supply module 300 supplies power to the perovskite battery 510 and the first thin-film photovoltaic cell 520, which is actually the power supply 310 supplying power to the perovskite battery 510 and the first thin-film photovoltaic cell 520. The excitation voltage / excitation current provided by the power supply 310 is the excitation voltage / excitation current provided by the power supply module 300.

[0073] In the embodiment, the detection darkroom 110 is used to provide a lightproof test environment required for electroluminescence detection, and the image acquisition module 400 is arranged in the detection darkroom 110. Specifically, the detection darkroom 110 can be arranged in the detection box 100, and the detection box 100 has an openable and closable box door to allow the perovskite / crystalline silicon laminated photovoltaic assembly to be detected to be sent into the darkroom and the perovskite / crystalline silicon laminated photovoltaic assembly to be detected to be removed from the darkroom, and the inner surface of the detection darkroom 110 is preferably provided with a matte black baking varnish coating to ensure a dark environment required for detection. For example, the width of the detection darkroom 110 is 400-1200 mm, and the height is 400-1500 mm.

[0074] More specifically, the inner part of the detection box 100 can also be provided with a carrier 200 or a fixing frame for carrying the perovskite / crystalline silicon laminated photovoltaic assembly. The carrier 200 or the fixing frame can be fixed on the detection box 100 or movably connected with the detection box 100. The carrier 200 or the fixing frame is in transmission connection with the driving motor, so that the carrier 200 or the fixing frame is driven by the driving motor to move between the detection darkroom 110 and the box door, thereby realizing the transfer of the perovskite / crystalline silicon laminated photovoltaic assembly. As a preferred solution, the first static contact and the second static contact can be arranged on the carrier 200 or the fixing frame. When the perovskite / crystalline silicon laminated photovoltaic assembly to be detected is placed on the carrier 200 or the fixing frame, the perovskite battery 510 and the first thin-film photovoltaic battery 520 in the perovskite / crystalline silicon laminated photovoltaic assembly are correspondingly and electrically connected with the first static contact and the second static contact, respectively.

[0075] More specifically, the image acquisition module 400 can be installed on the detection box 100 and located above the carrier 200 or the fixing frame. The image acquisition module 400 can be fixed at a specified position or movably connected with the detection box 100. For example, the detection box 100 can be provided with a guide rail, and the image acquisition module 400 is movably connected with the guide rail and can move along the guide rail. The guide rail and the assembly structure between the image acquisition module 400 and the guide rail can adopt structures and modes known in the art, which are not limited herein.

[0076] In the embodiment, the detection device for the perovskite laminated photovoltaic assembly further comprises an image analysis module. The image analysis module is coupled with the image acquisition module 400. The image analysis module is used to acquire the first image and the second image and perform image analysis on the first image and the second image to obtain the thin-film uniformity evaluation result and the defect evaluation result of the perovskite battery 510 and the first thin-film photovoltaic battery 520.

[0077] Embodiment 3

[0078] Please refer to Figure 1 and Figure 2The application discloses an electroluminescence detection device for a perovskite laminated photovoltaic component, and relates to the technical field of photovoltaic component detection.

[0079] The power supply module 300 is configured to supply power to the perovskite cell 510 and the first thin-film photovoltaic cell 520 of the perovskite laminated photovoltaic component to be detected in the first time period and the second time period, respectively, so that the perovskite cell 510 is excited to generate first excitation light in the first time period, and the first thin-film photovoltaic cell 520 is excited to generate second excitation light in the second time period.

[0080] The image acquisition module 400 is configured to acquire the first excitation light in the first time period and obtain an electroluminescence image of the perovskite cell 510, and acquire the second excitation light in the second time period and obtain an electroluminescence image of the first thin-film photovoltaic cell 520.

[0081] In the embodiment, refer to Figure 2 The power supply module 300 has a change-over switch 320, which can be switched between a first working state and a second working state. Specifically, the change-over switch 320 is in the first working state in the first time period and is in the second working state in the second time period. More specifically, when the change-over switch 320 is in the first working state, as shown in Figure 3 or Figure 5 , the circuit between the power supply module 300 and the perovskite cell 510 is in a conducting state, while the circuit between the power supply module 300 and the first thin-film photovoltaic cell 520 is in a nonconducting state. The power supply module 300 supplies power to the perovskite cell 510, the perovskite cell 510 is excited by the excitation voltage or current to generate the first excitation light, and the first excitation light is acquired by the image acquisition module 400 and forms a first image (i.e., an electroluminescence image of the perovskite cell 510, which is the same below). Figure 4 or Figure 6 , the circuit between the power supply module 300 and the first thin-film photovoltaic cell 520 is in a conducting state, while the circuit between the power supply module 300 and the perovskite cell 510 is in a nonconducting state. The power supply module 300 supplies power to the first thin-film photovoltaic cell 520, the first thin-film photovoltaic cell 520 is excited by the excitation voltage or current to generate the second excitation light, and the second excitation light is acquired by the image acquisition module 400 and forms a second image (i.e., an electroluminescence image of the first thin-film photovoltaic cell 520).

[0082] As one of the embodiments, refer to Figure 3 and Figure 4, the power supply module 300 comprises a power supply 310 and a change-over switch 320, the change-over switch 320 comprises a three-terminal switch, the three-terminal switch has a moving contact 321, a first stationary contact 322 and a second stationary contact 323, the moving contact 321 is electrically connected with the power supply 310, the first stationary contact 322 is electrically connected with the perovskite battery 510, the second stationary contact 323 is electrically connected with the first thin-film photovoltaic cell 520, the moving contact 321 is controllably electrically connected with the first stationary contact 322 or the second stationary contact 323, specifically, the moving contact 321 serves as a moving contact, the first stationary contact 322 and the second stationary contact 323 serve as two stationary contacts, when the moving contact 321 is electrically connected with the first stationary contact 322, the power supply module 300 is in a first state, as shown in Figure 3 , when the moving contact 321 is electrically connected with the second stationary contact 323, the power supply module 300 is in a second state, as shown in Figure 4 . For example, the moving contact 321, the first stationary contact 322 and the second stationary contact 323 can be a metal probe group, and the specific structure and product model of the three-terminal switch are not limited herein, which can be any three-terminal switch capable of achieving the above functions.

[0083] As one of the embodiments, referring to Figure 5 and Figure 6 , the power supply module 300 comprises a power supply 310 and a change-over switch 320, the change-over switch 320 comprises a first switch 324 and a second switch 325 which are independently arranged, the power supply 310 is electrically connected with the perovskite battery 510 through the first switch 324, and the power supply 310 is electrically connected with the first thin-film photovoltaic cell 520 through the second switch 325; when the first switch 324 is closed and the second switch 325 is opened, the power supply module 300 is in a first state, as shown in Figure 5 ; when the first switch 324 is opened and the second switch 325 is closed, the power supply module 300 is in a second state, as shown in Figure 6 . It should be noted that the first switch 324 and the second switch 325 can be known in the art, which can be obtained by purchase, and the specific structure and product model are not limited herein.

[0084] For example, the excitation voltage provided by the power supply 310 is 0-300V, and the excitation current is 0-5A, it can be understood that the power supply module 300 supplies power to the perovskite battery 510 and the first thin-film photovoltaic cell 520, which is actually that the power supply 310 supplies power to the perovskite battery 510 and the first thin-film photovoltaic cell 520, and the excitation voltage / excitation current provided by the power supply 310 is the excitation voltage / excitation current provided by the power supply module 300.

[0085] In the embodiment, the image acquisition module 400 comprises one or more cameras, and the cameras have a high-pass filter of 700nm-800nm. It should be noted that when multiple cameras are used, the multiple cameras are distributed equidistantly on the same horizontal plane. For example, the cameras can be industrial cameras, and the pixel / resolution configuration of the cameras can be selected according to specific requirements, which are not limited herein. The size of the high-pass filter can be selected according to different resolution requirements.

[0086] In the embodiment, the electroluminescence detection device for the perovskite laminated photovoltaic module further comprises a detection darkroom 110, and the detection darkroom 110 is used to provide a light-proof test environment required for electroluminescence detection. The image acquisition module 400 is arranged in the detection darkroom 110.

[0087] Specifically, the detection darkroom 110 can be arranged in the detection box 100. The detection box 100 has an openable and closable box door, so as to send the perovskite / crystalline silicon laminated photovoltaic module to be detected into the darkroom and remove the perovskite / crystalline silicon laminated photovoltaic module after detection from the darkroom. In addition, the inner surface of the detection darkroom 110 is preferably provided with a matte black baking varnish coating to ensure the dark environment required for detection. For example, the width of the detection darkroom 110 is 400mm-1200mm, and the height is 400mm-1500mm. More specifically, the inside of the detection box 100 can also be provided with a carrier 200 or a fixing frame for carrying the perovskite / crystalline silicon laminated photovoltaic module. The carrier 200 or the fixing frame can be fixed on the detection box 100 or movably connected with the detection box 100. The carrier 200 or the fixing frame is in transmission connection with a driving motor, so as to drive the carrier 200 or the fixing frame to move in the detection darkroom 110 and between the box door, thereby realizing the transfer of the perovskite / crystalline silicon laminated photovoltaic module. As a preferred solution, the first stationary contact 322 and the second stationary contact 323 of the change-over switch 320 can be arranged on the carrier 200 or the fixing frame. When the perovskite / crystalline silicon laminated photovoltaic module to be detected is placed on the carrier 200 or the fixing frame, the perovskite battery 510 and the first thin-film photovoltaic battery 520 in the perovskite / crystalline silicon laminated photovoltaic module are correspondingly and electrically connected with the first stationary contact 322 and the second stationary contact 323, respectively.

[0088] More specifically, the image acquisition module 400 can be installed on the detection box 100 and located above the carrier 200 or the fixing frame. The image acquisition module 400 can be fixed at a specified position or movably connected with the detection box 100. For example, the inside of the detection box 100 can be provided with a guide rail, and the image acquisition module 400 is movably connected with the guide rail and can move along the guide rail. The guide rail and the assembly structure between the image acquisition module 400 and the guide rail can adopt structures and modes known in the art, which are not limited herein.

[0089] In a more specific embodiment, the method for performing electroluminescence detection on the perovskite / crystalline silicon stacked photovoltaic module by the electroluminescence detection device for perovskite / crystalline silicon stacked photovoltaic module provided in the embodiment of the utility model can include the following flow:

[0090] The perovskite / crystalline silicon stacked photovoltaic module of four-terminal / two-terminal parallel structure is provided after lamination without connecting a junction box, the positive electrode and the negative electrode of the perovskite battery 510 (may also be referred to as perovskite layer / perovskite module, etc.) are connected with the electrode lead respectively, and the positive electrode and the negative electrode of the crystalline silicon battery 520 (may also be referred to as crystalline silicon layer / crystalline silicon module, etc.) are connected with the electrode lead 501 respectively.

[0091] The power supply 310 is electrically connected with the electric output end of the change-over switch 320, the electrode lead 501 of the perovskite battery 510 and the electrode lead 501 of the crystalline silicon battery 520 are electrically connected with the first stationary contact 322 and the second stationary contact 323 of the change-over switch 320 respectively, and the perovskite / crystalline silicon stacked photovoltaic module connected with the power supply is placed on the loading platform 200 in the detection darkroom 110, and the image acquisition module 400 is turned on at the same time; of course, the perovskite / crystalline silicon stacked photovoltaic module can be placed on the loading platform 200 in the detection darkroom 110 first, and then the perovskite battery 510 and the crystalline silicon battery 520 in the perovskite / crystalline silicon stacked photovoltaic module are coupled with the power supply 310, as shown in Figure 1 .

[0092] The power supply module 300 is switched to the first state, the power supply module 300 supplies power to the perovskite battery 510, the perovskite battery 510 emits the first excitation light, and the image acquisition module 400 obtains the electroluminescence image (i.e. the first image) of the perovskite battery 510 according to the first excitation light, as shown in Figure 7 .

[0093] The power supply module 300 is switched to the second state, the power supply module 300 supplies power to the crystalline silicon battery 520, the crystalline silicon battery 520 emits the second excitation light, and the image acquisition module 400 obtains the electroluminescence image (i.e. the second image) of the crystalline silicon battery 520 according to the second excitation light, as shown in Figure 8 .

[0094] The electroluminescence images of the perovskite battery and the crystalline silicon battery 520 are analyzed respectively to obtain the thin film uniformity evaluation result and the defect evaluation result of the perovskite battery 510 and the crystalline silicon battery 520, and the image analysis can be realized by a computer with an image analysis system, which is not limited here.

[0095] In the perovskite / crystalline silicon laminated solar cell, the perovskite cell serves as an effective optical absorption layer of the top cell to absorb light with a wavelength of 300-800 nm, and the corresponding emission light spectrum ranges from 700 nm to 800 nm; the crystalline silicon (c-Si) cell serves as an optical absorption layer of the bottom cell to mainly absorb light with a wavelength of 800-1200 nm, and the corresponding emission light spectrum ranges from about 1000 nm to 1200 nm. Therefore, the light emitted by the bottom crystalline silicon cell under electrical excitation cannot be absorbed by the top perovskite, so the perovskite cell and the crystalline silicon cell can be powered separately after the perovskite / crystalline silicon laminated solar cell is laminated and before the junction box is connected. The same set of cameras can be used to collect EL images of the perovskite cell and the crystalline silicon cell without flipping the perovskite / crystalline silicon laminated solar cell. It can be understood that, since the spectrum range collected by the camera covers the emission spectrum of the perovskite cell and the emission spectrum of the crystalline silicon cell, the same set of cameras is used to collect the number of photons emitted by the perovskite cell and the crystalline silicon cell after being powered to form an image, which is used for auxiliary analysis, thereby realizing EL image collection and analysis and detection of the perovskite cell and the crystalline silicon cell, and solving the problem of mutual interference of multiple cameras with different functions on the same horizontal plane. Moreover, the emission light of the bottom crystalline silicon cell after being excited by electricity is not absorbed by the top perovskite film layer, so the perovskite / crystalline silicon laminated solar cell does not need to be flipped by setting a flipping component, and EL image collection of the perovskite cell and the crystalline silicon cell can be realized at the same time.

[0096] It should be understood that the above embodiments are only to illustrate the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. An electroluminescence detection circuit for a perovskite tandem photovoltaic module, wherein the perovskite tandem photovoltaic module comprises stacked perovskite cells and a first thin-film photovoltaic cell, characterized in that, The electroluminescence detection circuit includes: A power supply module and a switching device are provided, wherein the switching device is coupled to the power supply module, the perovskite cell and the first thin-film photovoltaic cell, the power supply module, the switching device and the perovskite cell are configured as a first detection circuit, and the power supply module, the switching device and the first thin-film photovoltaic cell are configured as a second detection circuit. When the switching device turns on the power supply module and the perovskite cell, the first detection circuit is turned on, the second detection circuit is turned off, the power supply module supplies power to the perovskite cell, and the perovskite cell emits a first excitation light; when the switching device turns on the power supply module and the first thin-film photovoltaic cell, the first detection circuit is turned off, the second detection circuit is turned on, the power supply module supplies power to the first thin-film photovoltaic cell, and the first thin-film photovoltaic cell emits a second excitation light.

2. The electroluminescence detection circuit of the perovskite tandem photovoltaic module according to claim 1, characterized in that: The switching device includes a three-terminal switch having a moving contact, a first stationary contact, and a second stationary contact. The moving contact is electrically connected to the power supply module, the first stationary contact is electrically connected to the perovskite solar cell, and the second stationary contact is electrically connected to the first thin-film photovoltaic cell. The moving contact can be controllably electrically connected to either the first stationary contact or the second stationary contact. When the moving contact is electrically connected to the first stationary contact, the first detection circuit is activated; when the moving contact is electrically connected to the second stationary contact, the second detection circuit is activated. Alternatively, the switching device includes a first switch and a second switch, the power supply module is electrically connected to the perovskite cell via the first switch, the power supply module, the first switch and the perovskite cell are configured as the first detection circuit, the power supply module is electrically connected to the first thin-film photovoltaic cell via the second switch, and the power supply module, the second switch and the first thin-film photovoltaic cell are configured as the second detection circuit.

3. The electroluminescence detection circuit of the perovskite tandem photovoltaic module according to claim 1, characterized in that: The perovskite solar cell can absorb a third excitation light, which has a first wavelength band; the second excitation light has a second wavelength band, and the first wavelength band and the second wavelength band do not overlap.

4. The electroluminescence detection circuit of the perovskite tandem photovoltaic module according to claim 3, characterized in that: The second excitation light can pass through the perovskite cell.

5. The electroluminescence detection circuit of the perovskite tandem photovoltaic module according to claim 3, characterized in that: The first thin-film photovoltaic cell includes a crystalline silicon cell.

6. The electroluminescence detection circuit of the perovskite tandem photovoltaic module according to claim 3, characterized in that: The power supply module includes a voltage source or a current source. The voltage source provides an excitation voltage of 0~300V, and the current source provides an excitation current of 0-5A.

7. A testing device for a perovskite tandem photovoltaic module, the perovskite tandem photovoltaic module comprising stacked perovskite cells and a first thin-film photovoltaic cell, characterized in that, The detection device includes: A darkroom is used to provide the dark environment required for testing the perovskite tandem photovoltaic modules; A stage is provided in the dark chamber of the detection room and is used to support the perovskite tandem photovoltaic module. A power supply module is coupled to the perovskite cell and the first thin-film photovoltaic cell. The power supply module and the perovskite cell are configured as a first detection circuit, and the power supply module and the first thin-film photovoltaic cell are configured as a second detection circuit. The power supply module can switch between a first state and a second state. When the power supply module is in the first state, the first detection circuit is turned on and the second detection circuit is turned off, the power supply module supplies power to the perovskite cell, and the perovskite cell generates first excitation light; when the power supply module is in the second state, the first detection circuit is turned off and the second detection circuit is turned on, the power supply module supplies power to the first thin-film photovoltaic cell, the first thin-film photovoltaic cell generates second excitation light, and the second excitation light can pass through the perovskite cell. An image acquisition module is disposed in the detection dark chamber and above the stage. The image acquisition module can generate a first image based on the first excitation light and a second image based on the second excitation light.

8. The testing device for perovskite tandem photovoltaic modules according to claim 7, characterized in that: The power supply module includes a power source and a changeover switch. The changeover switch has a moving contact, a first stationary contact, and a second stationary contact. The power source is electrically connected to the moving contact. The first stationary contact is electrically connected to the electrode of the perovskite solar cell. The second stationary contact is electrically connected to the electrode of the first thin-film photovoltaic cell. The moving contact can be adjusted to be electrically connected to either the first or the second stationary contact, thereby switching the power supply module between the first state and the second state.

9. The testing device for perovskite tandem photovoltaic modules according to claim 8, characterized in that: The power supply includes a voltage source or a current source, wherein the voltage source provides an excitation voltage of 0~300V and the current source provides an excitation current of 0-5A.

10. The testing device for perovskite tandem photovoltaic modules according to claim 8, characterized in that: The first stationary contact and the second stationary contact include a metal probe group, which is electrically connected to the positive and negative electrodes of the perovskite cell or the first thin-film photovoltaic cell.

11. The testing device for perovskite tandem photovoltaic modules according to claim 10, characterized in that: The metal probe group is mounted on the stage.

12. The testing device for perovskite tandem photovoltaic modules according to claim 8, characterized in that: The detection darkroom is located inside the detection dark box, which has a door that can be opened and closed.

13. The testing device for perovskite tandem photovoltaic modules according to claim 12, characterized in that: The stage works in conjunction with the detection dark chamber and can move within the detection dark chamber.

14. The testing device for perovskite tandem photovoltaic modules according to claim 7, characterized in that: The image acquisition module includes one or more cameras, which are distributed at equal intervals on the same horizontal plane.

15. The testing device for perovskite tandem photovoltaic modules according to claim 14, characterized in that: The camera has a high-pass filter with a wavelength of 700nm to 800nm.

16. The detection device for perovskite tandem photovoltaic modules according to claim 14, characterized in that, It also includes an image analysis module, which is coupled to the image acquisition module. The image analysis module is used to acquire the first image and the second image, and to perform image analysis on the first image and the second image to obtain the thin film uniformity evaluation results and defect evaluation results of the perovskite solar cell and the first thin film photovoltaic cell.

17. An electroluminescence detection device for a perovskite tandem photovoltaic module, the perovskite tandem photovoltaic module comprising stacked perovskite cells and a first thin-film photovoltaic cell, characterized in that, include: The power supply module is used to supply power to the perovskite cell and the first thin-film photovoltaic cell of the perovskite tandem photovoltaic module to be tested in a first time period and a second time period, respectively, so that the perovskite cell is excited to generate a first excitation light in the first time period and the first thin-film photovoltaic cell is excited to generate a second excitation light in the second time period. The image acquisition module is used to acquire the first excitation light in a first time period and obtain the electroluminescence image of the perovskite solar cell, and to acquire the second excitation light in a second time period and obtain the electroluminescence image of the first thin-film photovoltaic cell.

18. The electroluminescence detection device for perovskite tandem photovoltaic modules according to claim 17, characterized in that: The power supply module has a switch that can switch between a first working state and a second working state. The switch is in the first working state during a first time period and in the second working state during a second time period. When the switching switch is in the first working state, the circuit between the power supply module and the perovskite cell is a closed circuit, while the circuit between the power supply module and the first thin-film photovoltaic cell is an open circuit. The perovskite cell is excited by the excitation voltage or current to generate the first excitation light. The first excitation light is acquired by the image acquisition module and forms the electroluminescent image of the perovskite cell. When the switching switch is in the second working state, the circuit between the power supply module and the first thin-film photovoltaic cell is closed, while the circuit between the power supply module and the perovskite cell is open. The first thin-film photovoltaic cell is excited by the excitation voltage or current to generate second excitation light. The second excitation light is acquired by the image acquisition module to form an electroluminescent image of the first thin-film photovoltaic cell.

19. The electroluminescence detection device for perovskite tandem photovoltaic modules according to claim 18, characterized in that: The power supply module includes a power source and a transfer switch. The transfer switch includes a three-terminal switch with a moving contact, a first stationary contact, and a second stationary contact. The moving contact is electrically connected to the power source, the first stationary contact is electrically connected to the perovskite solar cell, and the second stationary contact is electrically connected to the first thin-film photovoltaic cell. The moving contact can be controllably electrically connected to either the first or the second stationary contact. Alternatively, the transfer switch includes a first switch and a second switch, with the power source electrically connected to the perovskite solar cell via the first switch and to the first thin-film photovoltaic cell via the second switch.

20. The electroluminescence detection device for perovskite tandem photovoltaic modules according to claim 19, characterized in that: The power supply provides an excitation voltage of 0~300V and an excitation current of 0~5A.

21. The electroluminescence detection device for perovskite tandem photovoltaic modules according to claim 17, characterized in that: The image acquisition module includes one or more cameras, each camera having a 700nm~800nm ​​high-pass filter.

22. The electroluminescence detection device for perovskite tandem photovoltaic modules according to claim 21, characterized in that: The multiple cameras are distributed at equal intervals on the same horizontal plane.

23. The electroluminescence detection device for perovskite tandem photovoltaic modules according to claim 17, characterized in that: The electroluminescence detection device for perovskite tandem photovoltaic modules further includes: a detection dark chamber, which provides a light-shielding testing environment required for electroluminescence detection, and the image acquisition module is disposed inside the detection dark chamber.

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