A photovoltaic module insulation performance testing device

Abstract

The present invention discloses a photovoltaic module insulation performance testing device, which relates to the technical field of photovoltaic module testing devices. The device comprises a water pool, a photovoltaic panel placed inside the water pool, joints provided on both sides of the top of the photovoltaic panel, and a testing mechanism provided in the middle of the water pool for testing the performance of the photovoltaic panel. A positioning mechanism is provided inside the water pool for conveying the photovoltaic panel and clamping the joints. A humidifying mechanism is provided outside the testing mechanism for spraying water mist on the joints. The positioning mechanism conveys the photovoltaic panel and clamps the joints, assisting the testing mechanism in docking. The testing mechanism performs performance testing on the photovoltaic panel, while the humidifying mechanism sprays water on the joints to humidify them, thereby simulating a rainy day environment to test the performance of the photovoltaic panel. The photovoltaic module insulation performance testing device disclosed by the present invention has the effects of fully automatic testing, convenient operation, and high work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic module testing equipment, and in particular to a photovoltaic module insulation performance testing device. Background Art

[0002] Photovoltaic modules, also known as solar panels, are the most important components in solar power generation systems. A complete photovoltaic module is composed of dozens of solar cells, junction boxes, and frames. Since individual solar cells cannot be used directly as a power source, in order to use them as a power source, several individual cells must be connected in series and parallel and tightly packaged into modules.

[0003] When photovoltaic modules are used in humid environments, high voltage is more likely to leak, especially when they are exposed to dew, heavy rain or long-term exposure to humid water surfaces outdoors for a long time. In order to test the ability of photovoltaic modules to maintain low leakage current levels in humid environments, a rainy day environment will be simulated and insulation performance tests will be conducted on the photovoltaic modules (the photovoltaic panels to be tested will be placed in a pool of water, and the positive pole of the testing instrument and the lead wire of the photovoltaic panel will be short-circuited. The negative pole of the testing instrument will be equipped with a conductive metal and placed in the pool. The photovoltaic panels will be tested using the parameters set in advance by the testing equipment). (The invention relates to a method for testing the insulation resistance of photovoltaic panels during power-on testing.) However, due to the unfixed angle of the lead wires of photovoltaic panels, the positive electrode of the testing instrument and the lead wires of photovoltaic panels are manually short-circuited, and a series of preparatory work such as immersing and humidifying the photovoltaic panels are completed. When performing insulation performance tests on multiple photovoltaic panels of different batches, workers are required to constantly plug and unplug the positive electrode of the testing instrument and the lead wires of photovoltaic panels, as well as press and immerse the photovoltaic panels in water. Manual testing is labor-intensive, unsafe, and inefficient. Summary of the Invention

[0004] The present invention discloses a photovoltaic module insulation performance testing device, which aims to solve the technical problems of large manual labor and low work efficiency in the existing photovoltaic panel testing, which requires manual short-circuiting of the positive pole of the testing instrument and the lead wire of the photovoltaic panel, and completing a series of preparatory work such as immersing and humidifying the photovoltaic panel.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A photovoltaic module insulation performance testing device comprises a water pool, a photovoltaic panel placed within the water pool, joints provided on both sides of the top of the photovoltaic panel, a testing mechanism provided in the middle of the water pool for testing the performance of the photovoltaic panel, the testing mechanism comprising bases symmetrically fixed on both sides of the middle of the water pool, a lifting plate slidably mounted between the two bases, and two sets of plugs provided at the bottom of the lifting plate;

[0007] A positioning mechanism is provided inside the water pool, comprising a chain conveyor belt rotatably mounted inside the water pool, the chain conveyor belt comprising a flat placement area at the front section and a sunken immersion area at the rear section, and a positioning frame is fixed horizontally inside the water pool. When the photovoltaic panel moves from the flat placement area to the sunken immersion area, the positioning frame prevents the joint from contacting the water source;

[0008] The lifting plate drives the plug to descend and plug into the connector, and during the process of the lifting plate descending, it can drive the positioning lever on one side of the base to rotate horizontally, and cooperate with the positioning frame to straighten the plug so that the plug and the connector are on the same axis;

[0009] A humidifying mechanism for spraying water mist on the joint is provided on the outer side of the detection mechanism.

[0010] By setting up a positioning mechanism inside the water pool to transport photovoltaic panels and clamp the joints, the positioning mechanism is used to drive the photovoltaic panels to be immersed in the water surface, and the joints of the photovoltaic panels are connected to the additional detection mechanism instead of workers, thereby realizing full automation of the insulation performance testing of photovoltaic panels, greatly improving the convenience of traditional detection methods, and at the same time using the humidification mechanism to actively spray water mist on the joints of the photovoltaic panels, so as to better simulate the detection of the insulation performance of photovoltaic modules under heavy rain weather, thereby further improving the working efficiency and functionality of this equipment.

[0011] In a preferred solution, an electric push rod is vertically fixed on the top of the base, the output end of the electric push rod vertically penetrates into the interior of the base and is connected to one end of the lifting plate, an insulation withstand voltage tester is installed on the top end of the lifting plate, a positive pole wiring is plugged into the side of the insulation withstand voltage tester, the bottom of the positive pole wiring is connected to the plug, the plug and the connector are snap-connected, a negative pole wiring is also plugged into the side of the insulation withstand voltage tester, and one end of the negative pole wiring extends to the interior of the pool.

[0012] By setting up an insulation and voltage withstand tester fixed on the top of the lifting plate, and using an electric push rod to drive the lifting of the lifting plate, the plug connected to the positive end of the insulation and voltage withstand tester will rise and fall synchronously, thereby actively docking with the vertically placed connectors on both sides of the photovoltaic panel, and cooperating with the operation of the insulation and voltage withstand tester to test the insulation performance of the photovoltaic panel, thereby replacing workers and realizing full automation of the insulation performance testing of the photovoltaic panel, greatly improving the convenience of traditional testing methods.

[0013] In a preferred solution, a motor is horizontally installed on the outside of the water pool, and the output end of the motor horizontally penetrates into the interior of the water pool and is connected to the chain conveyor belt. The positioning frame is distributed on the top of the chain conveyor belt, and the photovoltaic panel is placed on the top of the chain conveyor belt. The joint is slidably distributed at the position of the positioning frame, and a threaded rod is vertically fixed inside the base. The top of the threaded rod vertically penetrates one end of the lifting plate, and a drive sleeve is sleeved on the outside of the threaded rod. The drive sleeve is rotatably installed at the bottom of one end of the lifting plate, and the side of the drive sleeve is fixed to the positioning lever, and the rotating positioning lever squeezes and contacts the side of the joint.

[0014] By setting up a chain conveyor belt structure driven by a motor, the chain conveyor belt is used to actively convey the placed photovoltaic panels. During the transportation, the positioning frame will squeeze and push the joints on both sides of the top of the photovoltaic panel, so that the joints are gradually straightened and placed vertically along both sides of the positioning frame. At the same time, as the lifting platform moves vertically, the threaded rod pushes the drive sleeve, causing the positioning lever to rotate synchronously, thereby pushing the side of the joint, causing the joint to be completely vertical and engaged with the plug, thereby replacing manual docking and greatly improving the convenience of traditional detection methods.

[0015] In a preferred embodiment, the humidification mechanism includes an airbag that is sleeved on the outside of the top of the plug, the top of the airbag is fixed to the bottom of the lifting plate, a water pumping pipe is fixed to the inner surface of the water pool, one end of the water pumping pipe is connected to the airbag, and a water spray row is connected between the two airbags.

[0016] By providing an airbag structure that is sleeved on the top of the plug, as the plug and the connector are docked, the lifting platform that continues to descend will squeeze the airbag, and the aqueous solution in the pool will be pumped out through the water nozzle on the lower surface of the water sprayer by utilizing the expansion and contraction of the airbag, thereby spraying and humidifying the connection between the connector and the plug. In conjunction with the operation of the insulation withstand voltage tester, the photovoltaic panels can be tested in simulated rainstorm weather, thereby improving the working efficiency and functionality of this equipment.

[0017] In a preferred solution, a one-way water outlet valve is installed at each end of the water spray row, and the two one-way water outlet valves are respectively connected to the interior of the two air bags, and a one-way water inlet valve is installed at one end of the water pump pipe, and the one-way water inlet valve is distributed inside the water pool.

[0018] By arranging a one-way water outlet valve and a one-way water inlet valve structure in conjunction with the expansion and contraction of the airbag, the flow direction of the aqueous solution inside the airbag is guided, thereby ensuring the perfect and reasonable operation of the humidification mechanism.

[0019] In a preferred embodiment, the positioning frame includes a convex portion, a bent portion and a limiting area, the convex portion is located at the transition position between the flat placement area and the concave immersion area of ​​the chain conveyor belt, the bent portion is located at the concave immersion area, and the limiting area is located between the bent portion and the convex portion.

[0020] As can be seen from the above, the photovoltaic module insulation performance testing device provided by the present invention has the following improvements and advantages compared with the prior art:

[0021] First: by setting up a chain conveyor belt structure driven by a motor, the chain conveyor belt is used to actively transport and immerse the placed photovoltaic panels in water. During the transportation, the positioning frame will squeeze and push the joints on both sides of the top of the photovoltaic panel, so that the joints are gradually straightened and placed vertically along both sides of the positioning frame. At the same time, as the lifting platform moves vertically, the threaded rod is used to push the drive sleeve, causing the positioning lever to rotate synchronously, thereby pushing the side of the joint, causing the joint to be completely vertical and engage with the plug at the bottom of the lifting platform. In conjunction with the operation of the insulation withstand voltage tester, the insulation performance of the photovoltaic panel is tested, thereby replacing workers and realizing full automation of the insulation performance testing of photovoltaic panels, greatly improving the convenience and safety of traditional testing methods.

[0022] Secondly, an airbag structure is provided on the outside of the top of the plug. As the plug and the connector are docked, the lifting platform continues to descend, which will squeeze the airbag. The water solution in the pool is pumped out through the water sprayer by the expansion and contraction of the airbag, thereby spraying and humidifying the connection between the connector and the plug. In conjunction with the operation of the insulation withstand voltage tester, the photovoltaic panels are tested in simulated rainstorm weather, thereby further improving the working efficiency and functionality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a photovoltaic module insulation performance testing device proposed by the present invention.

[0024] Figure 2 This is a side structural cross-sectional view of a water pool of a photovoltaic module insulation performance testing device proposed by the present invention.

[0025] Figure 3 This is a cross-sectional view of the detection mechanism structure of a photovoltaic module insulation performance detection device proposed by the present invention.

[0026] Figure 4 A photovoltaic module insulation performance testing device proposed by the present invention Figure 3 A magnified view of the structure at point A.

[0027] Figure 5 A photovoltaic module insulation performance testing device proposed by the present invention Figure 3A magnified view of the structure at point B.

[0028] Figure 6 This is a cross-sectional view of the airbag structure of a photovoltaic module insulation performance testing device proposed by the present invention.

[0029] Figure 7 This is a schematic diagram of the operating status of the positioning mechanism of a photovoltaic module insulation performance testing device proposed by the present invention.

[0030] Figure 8 A photovoltaic module insulation performance testing device proposed by the present invention Figure 7 Enlarged view of the structure at point C in the middle.

[0031] Figure 9 This is a structural schematic diagram of the humidification mechanism of a photovoltaic module insulation performance testing device proposed by the present invention.

[0032] Figure 10 This is a schematic diagram of the detection mechanism structure of a photovoltaic module insulation performance detection device proposed by the present invention.

[0033] Figure 11 This is a schematic diagram of the positioning frame structure of a photovoltaic module insulation performance testing device proposed by the present invention.

[0034] Figure 12 This is a top view of the initial state of the joint of the photovoltaic module insulation performance testing equipment proposed by the present invention.

[0035] Figure 13 This is a top view of a photovoltaic module insulation performance testing device proposed by the present invention, with the connector located at the knurled portion.

[0036] Figure 14 This is a top view of the contact state between the connector and the positioning lever of the photovoltaic module insulation performance testing equipment proposed by the present invention.

[0037] In the figure: 1. Water tank; 2. Photovoltaic panel; 3. Connector; 4. Testing mechanism; 401. Base; 402. Lifting plate; 403. Electric push rod; 404. Insulation and voltage tester; 405. Positive wiring; 406. Plug; 407. Negative wiring; 408. Metal rod; 5. Positioning mechanism; 501. Chain conveyor belt; 502. Motor; 503. Positioning frame; 5031. Profile; 5032. Bending part; 5033. Limiting area; 504. Threaded rod; 505. Drive sleeve; 506. Positioning lever; 6. Humidifying mechanism; 601. Air bag; 602. Water extraction pipe; 603. Water spray row; 604. One-way water outlet valve; 605. One-way water inlet valve; 606. Connecting pipe; 7. Guard plate; 8. Clamp. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] The photovoltaic module insulation performance testing device disclosed in the present invention is mainly used for testing the insulation performance of photovoltaic modules in rainy days.

[0040] Reference Figures 1 to 14 A photovoltaic module insulation performance testing device includes a water pool 1, a photovoltaic panel 2 placed inside the water pool 1, joints 3 provided on both sides of the top of the photovoltaic panel 2, and a testing mechanism 4 for testing the performance of the photovoltaic panel 2 provided in the middle of the water pool 1. The testing mechanism 4 includes bases 401 symmetrically fixed on both sides of the middle of the water pool 1, a lifting plate 402 slidably installed between the two bases 401, and two sets of plugs 406 provided on the bottom of the lifting plate 402;

[0041] A positioning mechanism 5 is provided inside the pool 1. The positioning mechanism 5 includes a chain conveyor belt 501 rotatably mounted inside the pool 1. The chain conveyor belt 501 includes a flat placement area at the front and a sunken immersion area at the rear. A positioning frame 503 is fixed horizontally inside the pool 1. When the photovoltaic panel 2 moves from the flat placement area to the sunken immersion area, the positioning frame 503 prevents the connector 3 from contacting the water source.

[0042] The lifting plate 402 drives the plug 406 to descend and plug into the connector 3. During the descent process, the lifting plate 402 can drive the positioning lever 506 on the side of the base 401 to rotate horizontally, and cooperate with the positioning frame 503 to straighten the plug 406 so that the plug 406 and the connector 3 are on the same axis.

[0043] A humidifying mechanism 6 for spraying water mist onto the joint 3 is provided outside the detecting mechanism 4 .

[0044] In this embodiment: before conducting the test, the operator needs to add aqueous solution to the inside of the water pool 1 (the solution temperature is controlled between 20 and 24 degrees Celsius, and the solution conductivity value needs to be greater than 286uS / cm), and at the same time place the photovoltaic panel 2 to be tested on the top of the positioning mechanism 5, and start the positioning mechanism 5, so that the positioning mechanism 5 drives the photovoltaic panel 2 to move horizontally to the lower submerged area and immerse it in water. While the photovoltaic panel 2 moves horizontally, the two joints 3 on both sides of the photovoltaic panel 2 will be driven by the positioning mechanism 5 and gradually straightened until the photovoltaic panel 2 moves to the maximum stroke. At this time, the detection mechanism 4 starts to operate, moves vertically and docks with the joint 3 and detects the insulation resistance value of the photovoltaic panel 2. At the same time, as the detection mechanism 4 continues to operate, the humidification mechanism 6 starts to operate and sprays water to humidify the joint 3, thereby further simulating the rainy day environment to test the performance of the photovoltaic panel 2.

[0045] In the above solution, considering the need to test the insulation performance of the flooded photovoltaic panel 2, the specific operations are as follows.

[0046] Reference Figures 1 to 7 、 Figure 10 In a preferred embodiment, the detection mechanism 4 includes a base 401 symmetrically fixed on both sides of the middle of the water pool 1, and a lifting plate 402 is slidably installed between the two bases 401. An electric push rod 403 is vertically fixed to the top of one base 401, and the output end of the electric push rod 403 vertically penetrates into the interior of the base 401 and is connected to one end of the lifting plate 402. An insulation withstand voltage tester 404 is installed at one end of the top of the lifting plate 402. A positive wiring 405 is plugged into the side of the insulation withstand voltage tester 404, and the bottom of the positive wiring 405 is connected to a plug 406. The plug 406 is engaged with the connector 3. A negative wiring 407 is also plugged into the side of the insulation withstand voltage tester 404, and one end of the negative wiring 407 extends to the interior of the water pool 1.

[0047] In this embodiment: the operator places the photovoltaic panel 2 to be tested on the top of the positioning mechanism 5 and starts the positioning mechanism 5, causing the positioning mechanism 5 to drive the photovoltaic panel 2 to move horizontally to the submerged area and immerse it in water, and while the photovoltaic panel 2 moves horizontally, the two joints 3 on both sides of the photovoltaic panel 2 will be driven by the positioning mechanism 5 and gradually straightened until the photovoltaic panel 2 moves to the maximum stroke. At this time, the electric push rod 403 and the insulation withstand voltage tester 404 are started synchronously, and the output shaft of the electric push rod 403 extends outward, thereby pushing the lifting plate 402 down, and at the same time driving the two plugs 406 to synchronously drop and clamp at the end of the joint 3, completing the photovoltaic panel 2 and the insulation withstand voltage tester 404. The insulation withstand voltage tester 404 is connected. At this time, the insulation withstand voltage tester 404 is started according to the pre-set parameters and uses the positive electrode connection 405 and the negative electrode connection 407 to apply voltage to the inside of the aqueous solution (the single test duration is controlled between one minute and three minutes), thereby detecting the insulation resistance value of the photovoltaic panel 2 (this is the existing technology and will not be repeated here); wherein, a metal rod 408 is vertically fixed to the bottom of the negative electrode connection 407, and the metal rod 408 is distributed inside the pool 1. The conductive performance of the negative electrode connection 407 is enhanced by the metal rod 408, and a clamp 8 is horizontally fixed to the inner surface of the pool 1, and the clamp 8 is sleeved on the outside of the metal rod 408 and the water suction pipe 602.

[0048] In the above scheme, considering that the connectors 3 located on both sides of the top of the photovoltaic panel 2 are normally in a randomly placed state, in order to dock the connector 3 and the plug 406 and complete the test, the specific operations are as follows.

[0049] Reference Figures 1 to 8 、 Figure 11In a preferred embodiment, the positioning mechanism 5 includes a chain conveyor belt 501 rotatably mounted inside the pool 1. The chain conveyor belt 501 includes a flat placement area at the front section and a concave immersion area at the rear section. A motor 502 is horizontally mounted on the outside of the pool 1. The output end of the motor 502 horizontally penetrates the interior of the pool 1 and is transmission-connected to the chain conveyor belt 501. A positioning frame 503 is horizontally fixed inside the pool 1. The positioning frame 503 is distributed on the top of the chain conveyor belt 501. The photovoltaic panel 2 Placed on the top of the chain conveyor belt 501, the joint 3 is slidably distributed at the position of the positioning frame 503. A threaded rod 504 is vertically fixed inside the base 401. The top of the threaded rod 504 vertically passes through one end of the lifting plate 402. A driving sleeve 505 is sleeved on the outer side of the threaded rod 504. The driving sleeve 505 is rotatably installed at the bottom of one end of the lifting plate 402. The side of the driving sleeve 505 is fixed to the positioning lever 506. The rotating positioning lever 506 presses and contacts the side of the joint 3.

[0050] Specifically, the positioning frame 503 includes a convex portion 5031, a bending portion 5032 and a limiting area 5033. The convex portion 5031 is located at the transition position between the flat placement area and the concave immersion area of ​​the chain conveyor belt 501, the bending portion 5032 is located at the concave immersion area, and the limiting area 5033 is located between the bending portion 5032 and the convex portion 5031.

[0051] In this embodiment: the photovoltaic panel 2 to be tested is placed on the top of the chain conveyor belt 501, and the motor 502 is started to rotate the motor 502 and drive the chain conveyor belt 501, so that the chain conveyor belt 501 drives the photovoltaic panel 2 to move horizontally to the submerged area and immerse it in water. In the process of horizontal movement of the photovoltaic panel 2, the two joints 3 located on both sides of the photovoltaic panel 2 will be restricted by the embossed portion 5031 of the positioning frame 503, so that the joints 3 move along the area between the embossed portion 5031 and the inner wall of the pool 1, as shown in FIG. Figures 12 to 13 As the chain conveyor belt 501 moves, the two joints 3 will gradually be located at the limit area 5033 and will be gradually straightened as the photovoltaic panel 2 moves and sinks. In this state, the joints 3 will be always restricted above the liquid surface. Figure 7 、 Figure 8 As shown; until the photovoltaic panel 2 moves to the maximum stroke, at this time, as the lifting plate 402 descends, the drive sleeve 505 located at the bottom of the lifting plate 402 is squeezed and driven by the threaded rod 504, thereby driving the positioning lever 506 to rotate and toggling the connectors 3 located on both sides of the positioning frame 503, causing the connectors 3 to be completely straightened, thereby docking with the plug 406.

[0052] It should be noted that: during the movement of the joint 3 along the limiting area 5033, the joint 3 may be in an inclined state, such as Figure 8As shown, two symmetrically distributed guard plates 7 are vertically fixed on the side of the positioning frame 503. The guard plates 7 will be squeezed and contacted with the rotated positioning rod 506, thereby forming a clamping fixation on both sides of the joint 3 to ensure the vertical placement of the joint 3, and the positioning rod 506 itself is flexible and can undergo a small deformation.

[0053] In the above scheme, in order to fully simulate rainstorm weather, although the connection between the connector 3 and the plug 406 cannot be immersed in water, it needs to be wetted simultaneously. The specific operation is as follows.

[0054] Reference Figure 1 、 Figure 3 、 Figures 5 to 7 、 Figure 9 In a preferred embodiment, the humidifying mechanism 6 includes an air bag 601 which is sleeved on the outside of the top of the plug 406, the top of the air bag 601 is fixed to the bottom of the lifting plate 402, and a water pumping pipe 602 is fixed to the inner surface of the pool 1. One end of the water pumping pipe 602 is connected to the air bag 601, and a water spray row 603 is connected between the two air bags 601.

[0055] In this embodiment, as the connector 3 and the plug 406 are docked, the lifting plate 402 that continues to move downward is unable to push the plug 406 to move further downward. At this time, the airbag 601 is squeezed and contracted, and while contracting, it squeezes the aqueous solution inside the airbag 601, causing the aqueous solution to be sprayed out from the water spray port on the lower surface of the water spray row 603 and sprayed onto the connection between the connector 3 and the plug 406. As the lifting plate 402 is reset and raised, the airbag 601, which is no longer restricted by the squeeze, is synchronously expanded and reset. At the same time, water is pumped into the airbag 601 through the water pumping pipe 602.

[0056] Among them, a one-way water outlet valve 604 is installed at each end of the water spray row 603, and the two one-way water outlet valves 604 are respectively connected to the interior of the two air bags 601, and a one-way water inlet valve 605 is installed at one end of the pumping pipe 602, and the one-way water inlet valve 605 is distributed inside the pool 1; when the air bag 601 is compressed, the driving force generated will be blocked and restricted by the one-way water inlet valve 605, so that only the air pressure and aqueous solution can be sprayed out from the water spray row 603; when the air bag 601 is reset and expanded, the pumping force generated will be restricted by the one-way water outlet valve 604, so that the aqueous solution in the pool 1 can only be pumped through the pumping pipe 602.

[0057] Furthermore, a connecting pipe 606 is connected between the top sides of the two airbags 601. The connecting pipe 606 is distributed above the water spray row 603 to connect the two airbags 601, and a reset spring is provided inside the airbag 601. The elastic force of the reset spring can ensure that the airbag 601 will not be compressed during the docking process of the connector 3 and the plug 406. Only after the docking is completed, the lifting plate 402 that continues to move downward will compress the airbag 601, and the reset spring can help the airbag 601 to reset and expand.

[0058] The workflow of this application is as follows:

[0059] First, the operator needs to add aqueous solution to the interior of the water pool 1 (the solution temperature is controlled between 20 and 24 degrees Celsius, and the solution conductivity value needs to be greater than 286uS / cm). At this time, the operator places the photovoltaic panel 2 to be tested on top of the chain conveyor 501 and starts the motor 502, causing the motor 502 to rotate and drive the chain conveyor 501, so that the chain conveyor 501 drives the photovoltaic panel 2 horizontally to the lower immersion area and immerses it in water;

[0060] During the horizontal movement of the photovoltaic panel 2, the two joints 3 on both sides of the photovoltaic panel 2 will be restricted by the knurled portion 5031 of the positioning frame 503, so that the joints 3 move along the area between the knurled portion 5031 and the inner wall of the pool 1, as shown in FIG. Figures 12 to 13 As the chain conveyor belt 501 moves, the two joints 3 are gradually located at the limiting area 5033 and are gradually straightened as the photovoltaic panel 2 moves and sinks. In this state, the joints 3 are always restricted above the liquid surface.

[0061] Then the electric push rod 403 and the insulation withstand voltage tester 404 are started synchronously, and the output shaft of the electric push rod 403 extends outward, thereby pushing the lifting plate 402 down, and at the same time, the two plugs 406 are driven to synchronously drop down and be clamped to the end of the connector 3, completing the connection between the photovoltaic panel 2 and the insulation withstand voltage tester 404. At the same time, the lifting plate 402 is lowered, and the driving sleeve 505 at the bottom of the lifting plate 402 is squeezed and driven by the threaded rod 504, thereby driving the positioning lever 506 to rotate and toggling the connectors 3 on both sides of the positioning frame 503, so that the connectors 3 are completely straightened, so as to better dock with the plugs 406. Figure 13 The status is shown;

[0062] As the connector 3 and the plug 406 are docked, the lifting plate 402 will continue to be pushed by the electric push rod 403 to move down a short distance, thereby squeezing the airbag 601, causing the airbag 601 to shrink. While shrinking, it squeezes the aqueous solution inside the airbag 601, causing the aqueous solution to spray out from the water outlet on the lower surface of the water spray row 603 and spray to the connection between the connector 3 and the plug 406, better simulating the rainy day environment (and as the lifting plate 402 is reset and lifted, the airbag 601, which has lost its squeezing restriction, is synchronously expanded and reset, and while expanding, water is pumped into the interior of the airbag 601 using the pumping pipe 602). Finally, the insulation withstand voltage tester 404 is started, and according to the pre-set parameters, voltage is applied to the interior of the aqueous solution using the positive connection 405 and the negative connection 407, thereby detecting the insulation resistance value of the photovoltaic panel 2.

[0063] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A photovoltaic module insulation performance testing device, comprising a water pool (1), a photovoltaic panel (2) placed inside the water pool (1), and joints (3) provided on both sides of the top of the photovoltaic panel (2), characterized in that: A detection mechanism (4) for performing performance detection on the photovoltaic panel (2) is provided in the middle of the water pool (1), the detection mechanism (4) comprising bases (401) symmetrically fixed on both sides of the middle of the water pool (1), a lifting plate (402) being slidably mounted between the two bases (401), and two sets of plugs (406) being provided at the bottom of the lifting plate (402); A positioning mechanism (5) is provided inside the water pool (1), and the positioning mechanism (5) includes a chain conveyor belt (501) rotatably installed inside the water pool (1), and the chain conveyor belt (501) includes a flat placement area at the front section and a recessed immersion area at the rear section. A positioning frame (503) is fixed horizontally inside the water pool (1), and when the photovoltaic panel (2) moves from the flat placement area to the recessed immersion area, the positioning frame (503) prevents the joint (3) from contacting the water source; The lifting plate (402) drives the plug (406) to descend and plug into the connector (3), and during the process of the lifting plate (402) descending, it can drive the positioning lever (506) on one side of the base (401) to rotate horizontally, and cooperate with the positioning frame (503) to straighten the plug (406) so that the plug (406) and the connector (3) are on the same axis; A humidifying mechanism (6) for spraying water mist on the joint (3) is provided on the outside of the detection mechanism (4).

2. A photovoltaic module insulation performance testing device according to claim 1, characterized in that: An electric push rod (403) is vertically fixed to the top of the base (401), and the output end of the electric push rod (403) vertically penetrates the interior of the base (401) and is connected to one end of the lifting plate (402). An insulation withstand voltage tester (404) is installed at one end of the top of the lifting plate (402). A positive wiring (405) is plugged into the side of the insulation withstand voltage tester (404), and the bottom of the positive wiring (405) is connected to a plug (406). The plug (406) and the connector (3) are snap-connected. A negative wiring (407) is also plugged into the side of the insulation withstand voltage tester (404), and one end of the negative wiring (407) extends into the interior of the pool (1).

3. A photovoltaic module insulation performance testing device according to claim 2, characterized in that: A motor (502) is horizontally installed on the outside of the water pool (1), and the output end of the motor (502) horizontally penetrates into the interior of the water pool (1) and is connected to the chain conveyor belt (501) in a transmission manner. The positioning frame (503) is distributed on the top of the chain conveyor belt (501), and the photovoltaic panel (2) is placed on the top of the chain conveyor belt (501). The joint (3) is slidably distributed at the position of the positioning frame (503). The inner portion of the base (401) A threaded rod (504) is vertically fixed to the bottom, the top of the threaded rod (504) vertically passes through one end of the lifting plate (402), the outer side of the threaded rod (504) is sleeved with a driving sleeve (505), the driving sleeve (505) is rotatably mounted on the bottom of one end of the lifting plate (402), the side of the driving sleeve (505) is fixed to the positioning lever (506), and the rotating positioning lever (506) is pressed and contacted with the side of the joint (3).

4. A photovoltaic module insulation performance testing device according to claim 3, characterized in that: The humidifying mechanism (6) includes an air bag (601) sleeved on the outside of the top of the plug (406), the top of the air bag (601) is fixed to the bottom of the lifting plate (402), a water pumping pipe (602) is fixed to the inner surface of the water pool (1), one end of the water pumping pipe (602) is connected to the air bag (601), and a water spray row (603) is connected between the two air bags (601).

5. A photovoltaic module insulation performance testing device according to claim 4, characterized in that: A metal rod (408) is vertically fixed to the bottom of the negative electrode connection (407), and the metal rod (408) is distributed inside the pool (1).

6. The photovoltaic module insulation performance testing device according to claim 5, characterized in that: A one-way water outlet valve (604) is installed at each end of the water spray row (603), and the two one-way water outlet valves (604) are connected to the interior of the two air bags (601) respectively.

7. A photovoltaic module insulation performance testing device according to claim 6, characterized in that: A one-way water inlet valve (605) is installed at one end of the water pumping pipe (602), and the one-way water inlet valve (605) is distributed inside the water pool (1).

8. The photovoltaic module insulation performance testing device according to claim 7, characterized in that: A connecting pipe (606) is connected between the top side surfaces of the two air bags (601), and the connecting pipe (606) is distributed above the water spray row (603).

9. The photovoltaic module insulation performance testing device according to claim 8, characterized in that: Two symmetrically distributed guard plates (7) are vertically fixed to the side of the positioning frame (503), and the guard plates (7) are in squeeze contact with the positioning lever (506). A clamp (8) is horizontally fixed to the inner surface of the pool (1), and the clamp (8) is sleeved on the outer side of the metal rod (408) and the water pumping pipe (602).

10. The photovoltaic module insulation performance testing device according to claim 9, characterized in that: The positioning frame (503) comprises a convex portion (5031), a bent portion (5032) and a limiting area (5033); the convex portion (5031) is located at a transition position between a planar placement area and a concave water-immersed area of ​​the chain plate conveyor belt (501); the bent portion (5032) is located in the concave water-immersed area; and the limiting area (5033) is located between the bent portion (5032) and the convex portion (5031).

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