Power test equipment of photovoltaic module and method for testing power of photovoltaic module

Abstract

The invention belongs to the technical field of photovoltaic module testing, and discloses a photovoltaic module power testing device and a photovoltaic module power testing method.The photovoltaic module power testing device comprises a ground rail installed on the ground and a simulator darkroom arranged beside the ground rail and used for providing a shading environment during photovoltaic module testing; the ground rail is slidably connected with a manipulator through a sliding seat, the tail end of the manipulator is provided with a sucker frame used for sucking up a photovoltaic module through a connecting piece, and the simulator darkroom is internally provided with an overturning frame used for bearing the photovoltaic module. The full-process automatic operation from feeding, carrying, double-face overturning testing to discharging is achieved, complicated manual carrying, positioning and overturning operation in traditional testing is eliminated, the testing process of the photovoltaic module is seamlessly connected, the testing period of a single product is greatly shortened, and the testing efficiency is improved. And the overall test efficiency of a production line is remarkably improved while the damage of the assembly caused by frequent carrying is avoided.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module testing technology, specifically to a power testing device for photovoltaic modules and a method for testing the power of photovoltaic modules. Background Technology

[0002] Photovoltaic modules are devices that use the photovoltaic effect of semiconductors to directly convert sunlight into electrical energy. In particular, bifacial photovoltaic modules can generate electricity by utilizing ambient reflected and scattered light on their back side, which can significantly improve the overall power generation of the photovoltaic system and has become the mainstream high-efficiency product in the market.

[0003] Since the power generation of both the front and back sides has a significant impact on the power generation performance of the module, when using a solar simulator to test the power of bifacial photovoltaic modules, it is generally necessary to perform IV characteristic tests on both the front and back sides separately.

[0004] Currently, photovoltaic modules weigh around 40kg. In the laboratory, when there are many test samples, each photovoltaic module needs to be moved to the simulator equipment one by one for power testing. In particular, the testing of both sides of bifacial modules further increases the workload of the testing personnel. The heavy sample handling greatly reduces work efficiency, and frequent handling can damage the modules and affect the test results. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a power testing device suitable for photovoltaic modules, mainly to solve the problems that heavy sample handling greatly reduces work efficiency and that frequent handling causes damage to the modules, affecting test results.

[0006] The present invention also provides a method for testing the power of photovoltaic modules using the above-mentioned equipment.

[0007] To achieve the first objective mentioned above, the present invention provides the following technical solution:

[0008] A power testing device for photovoltaic modules includes a ground rail installed on the ground and a simulator darkroom set next to the ground rail to provide a shading environment during photovoltaic module testing. A robotic arm is slidably connected to the ground rail via a slide block. The end of the robotic arm is equipped with a suction cup frame for picking up photovoltaic modules via a connector. A flip frame for carrying photovoltaic modules is installed inside the simulator darkroom. A visual inspection unit for taking pictures of the appearance features of photovoltaic modules is set at one end of the ground rail.

[0009] Furthermore, loading and unloading pallets are installed on the ground next to the starting end of the ground rail to support the neatly stacked photovoltaic modules. Photoelectric sensors for identifying the position of the loading pallet are installed on the ground outside the four corners of the loading pallet.

[0010] Furthermore, both the loading and unloading pallets are selected based on the size of the photovoltaic modules.

[0011] Based on the aforementioned scheme, the visual inspection unit includes a bracket fixedly connected to one end of the ground track, with a visual inspection camera fixedly connected to the top of the bracket, and the visual inspection camera is aimed at the robotic arm.

[0012] Based on the aforementioned solution, a position sensor for sensing the position of the photovoltaic module is fixedly connected to one side of the suction cup holder.

[0013] Based on the aforementioned scheme, a light-emitting component is installed on one side of the suction cup frame to illuminate the photovoltaic modules that are being lifted.

[0014] In one embodiment of the present invention, the flipping frame includes a fixed base for support, a support platform for carrying photovoltaic modules, a fixing mechanism for automatically clamping or loosening the photovoltaic modules, and a driving component for driving the support platform to rotate 180 degrees.

[0015] As a further embodiment of the present invention, a safety fence is installed around the movement trajectory of the robotic arm, and an openable fence door is installed inside the safety fence and on one side of the loading and unloading pallets for pushing in and pulling out photovoltaic modules.

[0016] Furthermore, a fixed bracket is fixedly connected to one side of the fence gate frame and above the opening and closing gate, and a human body sensor that is electrically connected to the mechanical arm is fixedly connected to the lower surface of the fixed bracket.

[0017] As a further embodiment of the present invention, the simulator darkroom has an opening on one side, and a closable single / double-opening darkroom curtain is installed on the edge of the opening. A darkroom door is provided on one side of the simulator darkroom and outside the safety fence, for test personnel to enter and exit the simulator darkroom to connect or disconnect the photovoltaic modules.

[0018] To achieve the second objective mentioned above, the present invention provides the following technical solution:

[0019] The method for testing the power of photovoltaic modules using the aforementioned equipment includes the following steps:

[0020] S1: First, the photovoltaic modules to be tested are neatly stacked on the loading pallet, either flat or vertical. Then, the loading pallet is pushed into the loading station, and photoelectric sensors are used to identify whether the loading pallet is in place.

[0021] S2: After the photovoltaic modules are placed, a robotic arm with a suction cup is used to pick up a photovoltaic module and move it to the front of the visual inspection camera to take a picture of its appearance. Based on the appearance feature photos of the photovoltaic modules taken by the visual inspection camera, the position of the photovoltaic modules is corrected and stability preprocessing is performed in conjunction with the robotic arm. Then, the robotic arm is used to accurately place the photovoltaic modules into the flipping frame in the simulator darkroom.

[0022] S3: The fixing mechanism on the flipping frame automatically clamps and fixes the photovoltaic module, the suction cup frame of the robotic arm is released, and the darkroom curtain is closed at the same time. In the simulator darkroom, the positive and negative terminals of the photovoltaic module are connected to the positive and negative terminals of the simulator. The simulator performs IV characteristic tests on the photovoltaic module. After one side is tested, the flipping component of the flipping frame flips the photovoltaic module 180 degrees to perform IV characteristic tests on the other side of the photovoltaic module.

[0023] S4: After the test is completed, enter the simulator darkroom, disconnect the positive and negative terminals of the photovoltaic module from the positive and negative terminals of the simulator, open the darkroom curtain, and at the same time, the suction cup of the robot arm will pick up the photovoltaic module. The fixing mechanism on the flipping frame will automatically release the photovoltaic module. The robot arm will move the photovoltaic module to the top of the unloading pallet, stack it neatly, and place it flat or vertically. The robot arm will repeat the test steps to test the next photovoltaic module.

[0024] Compared with the prior art, the present invention provides a power testing device for photovoltaic modules and a method for testing the power of photovoltaic modules using the device, which has the following beneficial effects:

[0025] 1. This invention achieves fully automated operation of the entire process from loading, handling, double-sided flipping test to unloading through the coordinated operation of a ground rail, a robotic arm, and a simulator darkroom with a built-in flipping frame. It eliminates the complicated manual handling, positioning, and flipping operations in traditional testing, seamlessly connects the testing process of double-sided components, significantly shortens the testing cycle of a single product, avoids damage to components caused by frequent handling, and significantly improves the overall testing efficiency of the production line.

[0026] 2. This invention improves the accuracy of IV test data by setting a vision detection unit in the robot's handling path, taking pictures of the component's appearance features and having the device perform position calculation and correction.

[0027] 3. This invention isolates the automated area from the personnel activity area by setting up a safety fence around the perimeter and installing a human body sensor at the fence gate to detect personnel approaching in real time and interlock with the system. This effectively prevents the risk of mechanical collisions during automatic loading and unloading and testing, as well as when testing personnel enter the darkroom to perform wiring operations, thus achieving safe human-machine collaborative operation.

[0028] 4. This invention ensures that the photovoltaic module is firmly held by a position sensor installed on the suction cup frame, and ensures the stability of the module during testing by working with the fixing device of the flipping frame. This greatly reduces the risk of hidden cracks or damage caused by shaking, misalignment or falling of the module during handling, positioning and testing, and improves the stability of the testing process.

[0029] 5. This invention is not only applicable to the testing of single-sided photovoltaic modules, but its advantages are particularly evident in the testing of bifacial photovoltaic modules. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the front three-dimensional structure of a power testing device for photovoltaic modules proposed in this invention;

[0031] Figure 2 This is a schematic diagram of the rear three-dimensional structure of a power testing device for photovoltaic modules proposed in this invention;

[0032] Figure 3 This invention proposes a power testing device for photovoltaic modules. Figure 1 An enlarged structural diagram;

[0033] Figure 4 This is a schematic diagram of the robotic arm and suction cup frame structure of a power testing device for photovoltaic modules proposed in this invention;

[0034] Figure 5 This is a schematic diagram of the fence gate and human body sensor structure of a power testing device for photovoltaic modules proposed in this invention;

[0035] Figure 6 This is a schematic diagram of the internal structure of a simulator darkroom for a power testing device for photovoltaic modules proposed in this invention.

[0036] Figure 7 This is a flowchart illustrating the operation of a power testing device for photovoltaic modules proposed in this invention.

[0037] Figure 8 This is a schematic diagram of a photovoltaic module before ultraviolet light irradiation, which is a power testing device for photovoltaic modules proposed in this invention.

[0038] Figure 9 This is a schematic diagram of a photovoltaic module after ultraviolet light treatment, which is part of a power testing device for photovoltaic modules proposed in this invention.

[0039] In the diagram: 1. Loading pallet; 2. Unloading pallet; 3. Ground rail; 4. Robotic arm; 5. Safety fence; 6. Suction cup holder; 7. Support frame; 8. Visual inspection camera; 9. Simulator darkroom; 10. Tilting frame; 11. Darkroom door; 12. Darkroom curtain; 13. Fence door; 14. Fixing frame; 15. Human body sensor; 16. Position sensor; 17. Light-emitting element; 18. Photoelectric sensor. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0041] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] Please see Figures 1-9 As shown:

[0044] in Figures 1-7As shown, a power testing device for photovoltaic modules includes a ground rail 3 fixed to the ground by a mounting base and a simulator darkroom 9 set next to the ground rail 3 to provide a shading environment during photovoltaic module testing. A robotic arm 4 is slidably connected to the ground rail 3 via a sliding seat. A suction cup frame 6 for picking up photovoltaic modules is installed at the end of the robotic arm 4 via a connector. A flip frame 10 for carrying photovoltaic modules is installed inside the simulator darkroom 9. A visual inspection unit for taking pictures of the appearance features of photovoltaic modules is provided at one end of the ground rail 3.

[0045] It should be noted that the ground rail 3 includes the rail body, the driving servo motor and reducer, the moving slide, the guiding components, and the control components. It is existing technology and is essentially a high-precision external linear motion axis for the robot. It liberates the robot arm 4 from a "fixed workstation" to a "mobile workstation". It is a classic and efficient solution for solving the needs of long-distance, multi-workstation, and high-precision automation. Its core value lies in using fewer robots to cover a larger area and complete more tasks. Those skilled in the art can set it according to the needs of the robot arm 4, which will not be elaborated here.

[0046] The robotic arm 4 consists of a base and a multi-joint robotic arm module, which together provide the required degrees of freedom of movement. The base is mounted on the slide of the ground rail 3, and the multi-joint robotic arm module is mounted on the base. It is usually a four-axis or six-axis industrial robot. Each joint is driven by a servo motor and the power is transmitted through a precision reducer. It can realize flexible and precise movement of the end effector in multiple directions such as vertical (Z-axis), horizontal (Y-axis), pitch, and yaw. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0047] It should be noted that the flipping frame 10 includes a fixed base for support, a support platform for carrying photovoltaic modules, a fixing mechanism for automatically clamping or loosening the photovoltaic modules, and a drive component for driving the support platform to rotate 180 degrees. Those skilled in the art can set these according to actual needs, and they will not be described in detail here.

[0048] In this invention, a loading pallet 1 and a unloading pallet 2 are provided on the ground next to the starting end of the ground rail 3 to support the neatly stacked photovoltaic modules. The loading pallet 1 and the unloading pallet 2 are selected according to the size of the photovoltaic modules.

[0049] First, the photovoltaic modules to be tested are neatly stacked on the loading pallet 1, which can be laid flat or vertically. Then, the loading pallet 1 is pushed into the loading station.

[0050] Photoelectric sensors 18 are fixed to the ground at the four corners of the loading pallet 1 by bolts. These sensors are used to identify whether the loading pallet 1 is placed in place, ensuring the accuracy of photovoltaic module pick-up.

[0051] It should be noted that the photoelectric sensor 18 is a diffuse reflection type. The emitter and receiver of the diffuse reflection sensor are integrated in the same probe to detect the reflected light on the surface of the tray, thereby determining the position. The preferred model is Pepperl+Fuchs ML100-8-HW / ML100-8-H. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0052] In this invention, the visual inspection unit includes a bracket 7 fixedly connected to one end of the ground rail 3 by bolts. A visual inspection camera 8 is fixedly connected to the top of the bracket 7 by bolts. The camera 8 can be the corner of the photovoltaic module or the junction box, and the visual inspection camera 8 is aimed at the photovoltaic module.

[0053] Furthermore, the visual inspection unit can be installed on the side of the ground rail 3 or directly above the vertical movement trajectory of the robotic arm to take pictures during the process of gripping and moving the photovoltaic module, or to take pictures in advance to make corrections while the photovoltaic module is waiting for the robotic arm to grab it.

[0054] It should be noted that the visual inspection camera 8 is a CCD camera. A CCD camera is a digital camera that uses a charge-coupled device (CCD) as an image sensor. Therefore, the CCD camera converts the optical scene into a digital image signal and outputs a raw pixel matrix. Then, in conjunction with subsequent software algorithms, image recognition is achieved. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0055] After the photovoltaic modules are placed, a robotic arm 4 with a suction cup holder 6 is used to pick up a photovoltaic module and move it in front of the visual inspection camera 8 to take a picture of the photovoltaic module's appearance. Based on the appearance feature photo of the photovoltaic module taken by the visual inspection camera 8, the position of the photovoltaic module is corrected in conjunction with the robotic arm 4. Then, the robotic arm 4 is used to accurately place the photovoltaic module into the flipping frame 10 in the simulator darkroom 9.

[0056] Based on the photos of the photovoltaic module's appearance features taken by the visual inspection camera 8, the position of the photovoltaic module is corrected and the stability of the photovoltaic module is pre-processed by the robot arm 4. Then, the robot arm 4 is used to accurately place the photovoltaic module into the flipping frame 10 carrier.

[0057] In this invention, a position sensor 16 for sensing the position of the photovoltaic module is fixedly connected to one side of the suction cup holder 6 by bolts, ensuring that the photovoltaic module is firmly fixed and preventing it from falling. A light-emitting element 17 is fixedly connected to one side of the suction cup holder 6 by screws. The light-emitting element 17 can be an ultraviolet light source (LTS-FTxxnn-UV ultraviolet light source) or a full-spectrum light source, which synchronously illuminates the photovoltaic module before or during the suction process, and performs stability pretreatment on photovoltaic modules with metastable phenomena.

[0058] Table 1 below shows examples of power test data before and after UV irradiation pretreatment.

[0059] Table 1. Examples of power test data before and after UV irradiation pretreatment

[0060] Sample number Initial power (W) Power after 1 minute of ultraviolet light irradiation Power after 2 minutes of UV irradiation Power after 3 minutes of ultraviolet light irradiation 1# 486.8 563.7 564.7 563.5 2# 506.7 562.8 562.7 562.5 3# 503.5 560.8 561.1 561.9

[0061] The data above shows that the sample was in a metastable state before UV irradiation, resulting in low power test results. After UV irradiation, the power increased significantly and stabilized after about 3 minutes. Therefore, treating the sample with a light source on a robotic arm before testing can eliminate the metastable effect of the component.

[0062] in Figures 8-9 The image shows the electroluminescence (EL) images of the photovoltaic module before and after ultraviolet light preprocessing.

[0063] According to Figure 8- Figure 9 It can be seen that the electroluminescence (EL) images of photovoltaic modules before and after ultraviolet light pretreatment show that after ultraviolet light pretreatment, the dark spot defects inside the cells of the metastable photovoltaic module sample are repaired and it is in a stable state, resulting in higher accuracy of power measurement results.

[0064] The position sensor 16 is existing technology and is a key front-end sensing unit to ensure the reliability and safety of the component grasping process. At the critical moment when the robot arm's end makes physical contact with the photovoltaic module, it provides accurate distance or presence detection, provides a direct and reliable trigger signal for the control system's "adsorption" decision, and serves as the first line of defense against misoperation and component collision. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0065] In this invention, a safety fence 5 is installed around the movement trajectory of the robotic arm 4 to isolate the robotic arm 4 from personnel and ensure personnel safety. Inside the safety fence 5 and located on one side of the loading pallet 1 and unloading pallet 2, there is an openable fence door 13 for pushing in and pulling out photovoltaic modules.

[0066] Furthermore, a fixing frame 14 is bolted to one side of the fence gate 13 frame and above the opening and closing gate. A human body sensor 15, which is electrically connected to the robotic arm 4 and used to sense personnel, is bolted to the lower surface of the fixing frame 14.

[0067] It should be noted that the human body sensor 15 is existing technology. It is an intelligent sensing terminal that integrates advanced sensing technology and is deeply embedded in the equipment safety control logic. Together with the mechanical system and control system, it jointly constructs an active safety protection network with rapid response, redundancy and reliability, and early warning capability. It is an indispensable technical element to ensure that automated equipment can achieve efficient, continuous and human-centered safe operation in complex industrial environments. The specific sensitivity and detection range can be adjusted according to the actual layout on site to balance safety and false alarm rate. The preferred model is ZT-IRSXD032N. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0068] In this invention, the simulator darkroom 9 has an opening on one side, and a closable single / double-opening darkroom curtain 12 is installed on the edge of the opening of the simulator darkroom 9 to ensure the shading environment during photovoltaic module testing and to avoid external reflected light from interfering with the test results. A darkroom door 11 is provided on one side of the simulator darkroom 9 and outside the safety fence 5, for test personnel to enter and exit the simulator darkroom 9 to connect or disconnect the photovoltaic modules.

[0069] The fixing mechanism on the flipping frame 10 automatically clamps and secures the photovoltaic module, the suction cup 6 of the robotic arm 4 releases, and the darkroom curtain 12 closes simultaneously. The tester enters the simulator darkroom 9 and connects the positive and negative terminals of the photovoltaic module to the positive and negative terminals of the simulator. The simulator performs IV characteristic tests on the photovoltaic module. After testing one side, the flipping component of the flipping frame 10 flips the photovoltaic module 180 degrees to perform IV characteristic tests on the other side. The flipping angle can also be set to perform IV characteristic tests on the photovoltaic module at an inclined angle.

[0070] After the test is completed, the tester enters the simulator darkroom 9, disconnects the positive and negative terminals of the photovoltaic module from the positive and negative terminals of the simulator, opens the darkroom curtain 12, and at the same time, the suction cup of the robotic arm 4 picks up the photovoltaic module. The fixing mechanism on the flipping frame 10 automatically releases the photovoltaic module, and the robotic arm 4 moves the photovoltaic module to the top of the unloading pallet 2 and stacks it neatly. It can be laid flat or vertically. The robotic arm 4 repeats the test steps to test the next photovoltaic module.

[0071] The method for testing the power of photovoltaic modules using the aforementioned power testing equipment includes the following steps:

[0072] S1: First, the photovoltaic modules to be tested are neatly stacked on the loading pallet 1, which can be placed flat or vertically. Then, the loading pallet 1 is pushed into the loading station, and the photoelectric sensor 18 is used to identify whether the loading pallet 1 is placed in place.

[0073] S2: After the photovoltaic module is placed, use the robotic arm 4 with suction cup 6 to pick up a photovoltaic module, move the photovoltaic module to the front of the visual inspection camera 8 to take a picture of the photovoltaic module's appearance, and use the robotic arm 4 to correct the position of the photovoltaic module based on the appearance feature picture of the photovoltaic module taken by the visual inspection camera 8. Then use the robotic arm 4 to accurately place the photovoltaic module into the flipping frame 10 in the simulator darkroom 9.

[0074] S3: The fixing mechanism on the flipping frame 10 automatically clamps and fixes the photovoltaic module, the suction cup frame 6 of the robotic arm 4 is released, and the darkroom curtain 12 is closed at the same time. The tester enters the simulator darkroom 9 and connects the positive and negative terminals of the photovoltaic module to the positive and negative terminals of the simulator. The simulator performs IV characteristic tests on the photovoltaic module. After one side is tested, the flipping component of the flipping frame 10 flips the photovoltaic module 180 degrees to perform IV characteristic tests on the other side of the photovoltaic module.

[0075] S4: After the test is completed, the tester enters the simulator darkroom 9, disconnects the positive and negative terminals of the photovoltaic module from the positive and negative terminals of the simulator, opens the darkroom curtain 12, and at the same time, the suction cup of the robotic arm 4 picks up the photovoltaic module. The fixing mechanism on the flipping frame 10 automatically releases the photovoltaic module, and the robotic arm 4 moves the photovoltaic module to the top of the unloading pallet 2 and stacks it neatly. It can be laid flat or vertically. The robotic arm 4 repeats the test steps to test the next photovoltaic module.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A power testing device for photovoltaic modules, comprising a ground rail (3) installed on the ground and a simulator darkroom (9) disposed beside the ground rail (3) for providing a shading environment during photovoltaic module testing, characterized in that, A robotic arm (4) is slidably connected to the ground rail (3) via a sliding seat. A suction cup frame (6) for picking up photovoltaic modules is installed at the end of the robotic arm (4) via a connector. A flip frame (10) for carrying photovoltaic modules is installed in the simulator darkroom (9). A visual inspection unit for taking photos of the appearance features of photovoltaic modules is provided at one end of the ground rail (3).

2. The power testing equipment for photovoltaic modules according to claim 1, characterized in that, The ground is provided with a loading pallet (1) and a unloading pallet (2) on the side of the starting end of the ground rail (3) to support the neatly stacked photovoltaic modules. Photoelectric sensors (18) for identifying the position of the loading pallet (1) are installed on the ground outside the four corner edges of the loading pallet (1). The loading pallet (1) and the unloading pallet (2) are selected according to the size of the photovoltaic modules.

3. The power testing equipment for photovoltaic modules according to claim 1, characterized in that, The visual inspection unit includes a bracket (7) fixedly connected to one end of the ground rail (3), and a visual inspection camera (8) fixedly connected to the top of the bracket (7), with the visual inspection camera (8) facing the robot arm (4).

4. The power testing equipment for photovoltaic modules according to claim 1, characterized in that, A position sensor (16) for sensing the position of photovoltaic modules is fixedly connected to one side of the suction cup holder (6).

5. The power testing equipment for photovoltaic modules according to claim 4, characterized in that, A light-emitting element (17) for illuminating the photovoltaic module being lifted is also installed on one side of the suction cup holder (6).

6. The power testing equipment for photovoltaic modules according to claim 1, characterized in that, The flipping frame (10) includes a fixed base for support, a support platform for carrying photovoltaic modules, a fixing mechanism for automatically clamping or loosening photovoltaic modules, and a drive component for driving the support platform to rotate 180 degrees.

7. The power testing equipment for photovoltaic modules according to claim 1, characterized in that, A safety fence (5) is installed around the movement trajectory of the robotic arm (4). Inside the safety fence (5) and located on one side of the loading pallet (1) and unloading pallet (2), there is an openable fence door (13) for pushing in and pulling out photovoltaic modules.

8. The power testing equipment for photovoltaic modules according to claim 7, characterized in that, A fixed frame (14) is fixedly connected to one side of the fence gate (13) and above the opening and closing gate. A human body sensor (15) electrically connected to the robot arm (4) is fixedly connected to the lower surface of the fixed frame (14).

9. A power testing device for a photovoltaic module according to any one of claims 1-8, characterized in that, The simulator darkroom (9) has an opening on one side, and a single / double opening darkroom curtain (12) that can be closed is installed on the edge of the opening of the simulator darkroom (9). A darkroom door (11) is provided on one side of the simulator darkroom (9) and located outside the safety fence (5) for test personnel to enter and exit the simulator darkroom (9) to connect or disconnect the photovoltaic modules.

10. A method for testing the power of photovoltaic modules using the equipment described in claim 9, characterized in that, Includes the following steps: S1: First, the photovoltaic modules to be tested are neatly stacked on the loading pallet (1), either flat or vertical. Then, the loading pallet (1) is pushed into the loading station, and the photoelectric sensor (18) is used to identify whether the loading pallet (1) is in place. S2: After the photovoltaic module is placed, a robot arm (4) with a suction cup holder (6) is used to pick up a photovoltaic module and move it to the front of the visual inspection camera (8) to take a picture of the photovoltaic module's appearance. Based on the appearance feature photo of the photovoltaic module taken by the visual inspection camera (8), the position of the photovoltaic module is corrected and the stability of the photovoltaic module is pre-processed with the robot arm (4). Then, the robot arm (4) is used to accurately place the photovoltaic module into the flipping frame (10) in the simulator darkroom (9). S3: The fixing mechanism on the flipping frame (10) automatically clamps and fixes the photovoltaic module, the suction cup frame (6) of the robot (4) is released, and the darkroom curtain (12) is closed at the same time. In the simulator darkroom (9), the positive and negative terminals of the photovoltaic module are connected to the positive and negative terminals of the simulator. The simulator performs IV characteristic tests on the photovoltaic module. After one side is tested, the flipping component of the flipping frame (10) flips the photovoltaic module 180 degrees and performs IV characteristic tests on the other side of the photovoltaic module. S4: After the test is completed, in the simulator darkroom (9), disconnect the positive and negative terminals of the photovoltaic module from the positive and negative terminals of the simulator, open the darkroom curtain (12), and at the same time, the suction cup of the robot (4) will hold the photovoltaic module. The fixing mechanism on the flipping frame (10) will automatically release the photovoltaic module. The robot (4) will move the photovoltaic module to the top of the unloading pallet (2), stack it neatly, and place it flat or vertically. The robot (4) will repeat the test steps to test the next photovoltaic module.

Images