Perovskite solar cell IV curve tester and test method

Abstract

The invention discloses a perovskite solar cell IV curve tester which comprises a machine table, conveying belts are arranged on the two sides of the machine table, a simulation light source is arranged below the two conveying belts, the top of the machine table is connected with a test connector through a first air cylinder, the first air cylinder stretches out and draws back vertically, and a main control module is installed in the machine table. The main control module is connected with an IGBT module through an IGBT driver, the test connector is connected with a simulation conditioning unit, the simulation conditioning unit is used for collecting real-time voltage and current signals of the perovskite solar cell, and the simulation conditioning unit is connected with the main control module and the IGBT driver and sends the collected voltage and current signals to the main control module and the IGBT driver; a positioning mechanism is connected above the conveying belt through a second air cylinder, and the second air cylinder transversely stretches out and draws back. According to the invention, the defects in the prior art can be overcome, the voltage and current adjusting precision of the test equipment is improved, and the one-time plug-in success rate of the test connector and the battery junction box is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cell detection, in particular to a perovskite solar cell IV curve tester and a test method. Background Art

[0002] Since perovskite solar cells need a long time to regain a stable state when the load changes, when testing the IV curve of perovskite solar cells, the test equipment needs to be able to continuously adjust the current and voltage of the test loop according to the output state of the perovskite solar cell. During the test process of existing test equipment, the voltage and current of the test loop fluctuate greatly, and the adjustment accuracy needs to be improved. In addition, during large-scale automated testing, the one-time plug-in failure rate of the test connector and the battery junction box is high, resulting in the inability to further improve the equipment testing efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a perovskite solar cell IV curve tester and a testing method, which can solve the deficiencies of the prior art, improve the voltage and current regulation accuracy of the testing equipment, and improve the one-time plug-in success rate of the test connector and the battery junction box.

[0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0005] A perovskite solar cell IV curve tester comprises a machine platform, conveyor belts are arranged on both sides of the machine platform, a simulated light source is arranged below the two conveyor belts, a test joint is connected to the top of the machine platform through a first cylinder, the first cylinder is vertically retracted, a main control module is installed in the machine platform, the main control module is connected to an IGBT module through an IGBT driver, an analog conditioning unit is connected to the test joint, the analog conditioning unit is used to collect real-time voltage and current signals of the perovskite solar cell, the analog conditioning unit is respectively connected to the main control module and the IGBT driver, and the collected voltage and current signals are sent to the main control module and the IGBT driver; a positioning mechanism is connected to the top of the conveyor belt through a second cylinder, the second cylinder is fixed on the inner wall of the machine platform, and the second cylinder is horizontally retracted.

[0006] Preferably, the positioning mechanism includes a third cylinder fixed on the piston end of the second cylinder, the third cylinder is vertically retractable, and the piston end of the third cylinder is detachably installed with a clamp, and a slide groove is provided on the inner side wall of the machine, and a limit plate is slidably installed in the slide groove, and a locking bolt is installed on the limit plate. The limit plate is located above the clamp and is used to limit the highest rising position of the clamp.

[0007] Preferably, the test joint includes a fourth cylinder fixed on the piston end of the first cylinder, the fourth cylinder is horizontally retracted, and the piston end of the fourth cylinder is fixedly installed with a pneumatic connector that is plugged into and cooperates with the plug of the perovskite solar cell junction box. The bottom of the piston end of the first cylinder is connected to a pressure plate through a spring, and the extension and retraction direction of the spring is parallel to the extension and retraction direction of the first cylinder.

[0008] Preferably, the pneumatic connecting head comprises a frame installed on a fourth cylinder, a partition is fixed in the middle of the frame, the width of the partition gradually increases from top to bottom, fifth cylinders are respectively installed on both sides of the frame, the fifth cylinder is horizontally retracted, a chuck is installed on the piston end of the fifth cylinder, and a metal connecting column is fixed on the bottom of the frame.

[0009] Preferably, the chuck comprises two symmetrically arranged elastic arc-shaped pieces, the top of the elastic arc-shaped piece is connected with a guide piece inclined outward, and the bottom of the elastic arc-shaped piece is fixed with a limiting spring piece.

[0010] Preferably, an elastic rubber sleeve is sleeved on the outer side of the metal connecting column, and the inner diameter of the elastic rubber sleeve gradually decreases from top to bottom.

[0011] A test method for the above-mentioned perovskite solar cell IV curve tester comprises the following steps: placing the perovskite solar cell on a conveyor belt, the conveyor belt conveys the perovskite solar cell into a machine, a positioning mechanism fixes the perovskite solar cell, a test connector is connected to a junction box of the perovskite solar cell, and then a simulated light source is turned on, and at the same time, a main control module controls the action of an IGBT driver through an IGBT driver; in a constant voltage mode, a proposed conditioning unit sends a collected voltage signal to the main control module to form a soft feedback, and the proposed conditioning unit sends the collected voltage signal to the IGBT driver to form a hard feedback, forming an inner and outer loop dual feedback structure to achieve voltage constancy, and testing the perovskite solar cell according to a preset step and speed; in a constant current mode, the proposed conditioning unit sends a collected current signal to the main control module to form a soft feedback, and the proposed conditioning unit sends the collected current signal to the IGBT driver to form a hard feedback, forming an inner and outer loop dual feedback structure to achieve current constancy, and then testing the perovskite solar cell according to a preset step and speed.

[0012] The beneficial effects brought about by adopting the above technical solution are: the present invention utilizes IGBT and the main control module to form an inner and outer loop dual feedback structure, thereby improving the voltage and current regulation accuracy of the test loop. At the same time, by optimizing the battery positioning mechanism and the test connector, the one-time plug-in success rate of the test connector and the battery junction box is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the overall structural diagram of the present invention.

[0014] Figure 2 It is the electrical control principle diagram of the present invention.

[0015] Figure 3 It is a structural diagram of the positioning mechanism of the present invention.

[0016] Figure 4 This is a structural diagram of the test joint of the present invention.

[0017] Figure 5 It is a structural diagram of the pneumatic connector of the present invention.

[0018] Figure 6 It is a structural diagram of the chuck of the present invention. DETAILED DESCRIPTION

[0019] Reference Figure 1-6 A specific embodiment of the present invention includes a machine 1, conveyor belts 2 are arranged on both sides of the machine 1, and simulated light sources 3 are arranged below the two conveyor belts 2. The top of the machine 1 is connected to a test joint 4 through a first cylinder 9, and the first cylinder 9 is vertically retracted. A main control module 5 is installed in the machine 1, and the main control module 5 is connected to an IGBT module 7 through an IGBT driver 6. The test joint 4 is connected to an analog conditioning unit 8, and the analog conditioning unit 8 is used to collect real-time voltage and current signals of perovskite solar cells. The analog conditioning unit 8 is respectively connected to the main control module 5 and the IGBT driver 6, and sends the collected voltage and current signals to the main control module 5 and the IGBT driver 6; a positioning mechanism 11 is connected to the top of the conveyor belt 2 through a second cylinder 10, and the second cylinder 10 is fixed on the inner wall of the machine 1, and the second cylinder 10 is horizontally retracted.

[0020] A test method for the above-mentioned perovskite solar cell IV curve tester includes the following steps: placing the perovskite solar cell on a conveyor belt 2, the conveyor belt 2 transports the perovskite solar cell to a machine 1, a positioning mechanism 11 fixes the perovskite solar cell, a test connector 4 is connected to a junction box of the perovskite solar cell, and then a simulated light source 3 is turned on, while a main control module 5 controls the IGBT driver 6 to operate (adjusting the voltage and current parameters of the test circuit through the IGBT driver 6); in a constant voltage mode, a conditioning unit 8 collects the voltage signal The signal is sent to the main control module 5 to form a soft feedback, and the proposed conditioning unit 8 sends the collected voltage signal to the IGBT driver 6 to form a hard feedback, forming an inner and outer loop dual feedback structure to achieve voltage constancy, and the perovskite solar cell is tested according to the preset step size and speed; in the constant current mode, the proposed conditioning unit 8 sends the collected current signal to the main control module 5 to form a soft feedback, and the proposed conditioning unit 8 sends the collected current signal to the IGBT driver 6 to form a hard feedback, forming an inner and outer loop dual feedback structure to achieve current constancy, and then the perovskite solar cell is tested according to the preset step size and speed.

[0021] The positioning mechanism 11 includes a third cylinder 12 fixed on the piston end of the second cylinder 10. The third cylinder 12 is vertically retractable. The piston end of the third cylinder 12 is detachably mounted with a clamp 13. A slide groove 14 is provided on the inner side wall of the machine 1. A limit plate 15 is slidably mounted in the slide groove 14. A locking bolt 30 is installed on the limit plate 15. The limit plate 15 is located above the clamp 13 to limit the highest rising position of the clamp 13. The second cylinder 10 realizes the lateral movement of the positioning mechanism 11 and completes the clamping and releasing actions. The clamp 13 is used to clamp the edge of the battery panel, and the third cylinder 12 cooperates with the limit plate 15 to adjust the positioning height of the battery panel.

[0022] The test joint 4 includes a fourth cylinder 16 fixed on the piston end of the first cylinder 9, the fourth cylinder 16 is horizontally retractable, and a pneumatic connector 17 that is plugged and matched with the plug of the perovskite solar cell junction box is fixedly installed on the piston end of the fourth cylinder 16. The bottom of the piston end of the first cylinder 9 is connected to a pressure plate 19 through a spring 18, and the retracting direction of the spring 18 is parallel to the retracting direction of the first cylinder 9. The pneumatic connector 17 includes a frame 20 installed on the fourth cylinder 16, a barrier 21 is fixed in the middle of the frame 20, and the width of the barrier 21 gradually increases from top to bottom. The fifth cylinder 22 is installed on both sides of the frame 20, and the fifth cylinder 22 is horizontally retractable. A chuck 23 is installed on the piston end of the fifth cylinder 22, and a metal connecting column 24 is fixed on the bottom surface of the frame 20. The chuck 23 includes two symmetrically arranged elastic arc pieces 25, the top of the elastic arc piece 25 is connected to a guide piece 26 inclined to the outside, and the bottom of the elastic arc piece 25 is fixed with a limit spring piece 27. The inner wall of the elastic arc-shaped sheet 25 is provided with a toothed rubber layer 28. An elastic rubber sleeve 29 is sleeved on the outer side of the metal connecting column 24, and the inner diameter of the elastic rubber sleeve 29 gradually decreases from top to bottom. When the test connector 4 is connected to the junction box, the first cylinder 9 is first lowered to crimp the pressure plate 19 on the end of the junction box plug to fix the junction box plug and properly tilt the junction box plug. Then the fourth cylinder 16 drives the pneumatic connector 17 to move toward the junction box plug so that the metal connecting column 24 is plugged and matched with the junction box plug. After the junction box plug is inserted into the frame 20, the fifth cylinder 22 drives the chuck 23 to squeeze the junction box plug toward the barrier 21 so that the junction box plug is clamped into the chuck 23. The limiting spring piece 27 applies an elastic extrusion force to the junction box plug, so that sufficient static friction is formed between the junction box plug and the toothed rubber layer 28, so that the junction box plug is stably clamped in the chuck 23. The plugging and matching between the test connector 4 and the junction box plug requires a high degree of redundancy in the position of the junction box plug, so as to achieve a one-time plugging completion with a high success rate.

[0023] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A perovskite solar cell IV curve tester, comprising a machine platform (1), conveyor belts (2) are arranged on both sides of the machine platform (1), a simulated light source (3) is arranged below the two conveyor belts (2), the top of the machine platform (1) is connected to a test connector (4) through a first cylinder (9), and the first cylinder (9) is vertically retractable, characterized in that: The machine (1) is equipped with a main control module (5), the main control module (5) is connected to an IGBT module (7) via an IGBT driver (6), the test connector (4) is connected to an analog conditioning unit (8), the analog conditioning unit (8) is used to collect real-time voltage and current signals of the perovskite solar cell, the analog conditioning unit (8) is connected to the main control module (5) and the IGBT driver (6) respectively, and sends the collected voltage and current signals to the main control module (5) and the IGBT driver (6); the upper part of the conveyor belt (2) is connected to a positioning mechanism (11) via a second cylinder (10), the second cylinder (10) is fixed on the inner wall of the machine (1), and the second cylinder (10) is laterally retractable.

2. The perovskite solar cell IV curve tester according to claim 1, characterized in that: The positioning mechanism (11) comprises a third cylinder (12) fixed on the piston end of the second cylinder (10), the third cylinder (12) is vertically retractable, and the piston end of the third cylinder (12) is detachably mounted with a fixture (13), the inner side wall of the machine platform (1) is provided with a slide groove (14), a limit plate (15) is slidably mounted in the slide groove (14), a locking bolt (30) is mounted on the limit plate (15), and the limit plate (15) is located above the fixture (13) and is used to limit the highest rising position of the fixture (13).

3. The perovskite solar cell IV curve tester according to claim 1, characterized in that: The test joint (4) comprises a fourth cylinder (16) fixed on the piston end of the first cylinder (9); the fourth cylinder (16) is horizontally retractable; a pneumatic connector (17) that is plugged into and matched with a plug of a perovskite solar cell junction box is fixedly mounted on the piston end of the fourth cylinder (16); a pressure plate (19) is connected to the bottom of the piston end of the first cylinder (9) via a spring (18); and the retractable direction of the spring (18) is parallel to the retractable direction of the first cylinder (9).

4. The perovskite solar cell IV curve tester according to claim 3, characterized in that: The pneumatic connector (17) comprises a frame (20) mounted on a fourth cylinder (16), a baffle (21) being fixed in the middle of the frame (20), the width of the baffle (21) gradually increasing from top to bottom, fifth cylinders (22) being respectively mounted on both sides of the frame (20), the fifth cylinder (22) being horizontally retractable, a chuck (23) being mounted on the piston end of the fifth cylinder (22), and a metal connecting column (24) being fixed on the bottom surface of the frame (20).

5. The perovskite solar cell IV curve tester according to claim 4, characterized in that: The clamping head (23) comprises two symmetrically arranged elastic arc-shaped pieces (25), the top of the elastic arc-shaped piece (25) is connected with a guide piece (26) inclined outward, and the bottom of the elastic arc-shaped piece (25) is fixed with a limiting spring piece (27).

6. The perovskite solar cell IV curve tester according to claim 4, characterized in that: An elastic rubber sleeve (29) is sleeved on the outer side of the metal connecting column (24), and the inner diameter of the elastic rubber sleeve (29) gradually decreases from top to bottom.

7. A method for testing a perovskite solar cell IV curve tester according to any one of claims 1 to 6, characterized in that The following steps are involved: The perovskite solar cell is placed on a conveyor belt (2), the conveyor belt (2) transports the perovskite solar cell into the machine (1), the positioning mechanism (11) fixes the perovskite solar cell, the test connector (4) is connected to the junction box of the perovskite solar cell, and then the simulated light source (3) is turned on, and at the same time, the main control module (5) controls the IGBT driver (6) to operate through the IGBT driver (6); in the constant voltage mode, the quasi-conditioning unit (8) sends the collected voltage signal to the main control module (5) to form soft feedback, and the quasi-conditioning unit (8) The collected voltage signal is sent to the IGBT driver (6) to form hard feedback, forming an inner and outer loop dual feedback structure to achieve voltage constancy, and the perovskite solar cell is tested according to the preset step size and speed; in the constant current mode, the quasi-conditioning unit (8) sends the collected current signal to the main control module (5) to form soft feedback, and the quasi-conditioning unit (8) sends the collected current signal to the IGBT driver (6) to form hard feedback, forming an inner and outer loop dual feedback structure to achieve current constancy, and then the perovskite solar cell is tested according to the preset step size and speed.

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