Photovoltaic module testing apparatus and testing method

Abstract

The present application relates to the technical field of solar photovoltaic module, and particularly relates to a photovoltaic module testing device and a testing method. The photovoltaic module testing device comprises: two mechanical hands suitable for being arranged on two sides of a conveying line conveying photovoltaic modules, each mechanical hand comprising a mechanical arm and a clamping hand, the clamping hand comprising a plug-pull driving element, a first clamp and a testing connector, the plug-pull driving element being fixed on the mechanical arm, at least one of the first clamp and the testing connector being connected with a driving end of the plug-pull driving element, the first clamp clamping a power connector, the plug-pull driving element driving at least one of the first clamp and the testing connector to move; a testing mechanism arranged at a position where the conveying line is located, the testing mechanism being electrically connected with the testing connector, a testing area being formed on the conveying line, the testing mechanism being suitable for testing the photovoltaic module at the testing area. The testing of the photovoltaic module is realized by only grabbing the power connector through the mechanical hand, the installation of the testing tool is reduced, and the testing efficiency is high.

Description

Technical Field

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

[0002] In the photovoltaic module manufacturing process, IV testing and EL testing are essential steps in the photovoltaic module production line. Photovoltaic modules must undergo IV testing to obtain their power, current, etc., and EL testing is used to determine whether there are internal defects in the module, thereby ensuring the performance of the photovoltaic module. The testing process is an important reflection of the module production quality.

[0003] IV and EL tests require the installation of test fixtures on the photovoltaic modules. During IV testing, the modules are illuminated by a simulated solar light source. The test fixtures collect relevant current and voltage data to obtain the IV characteristic curve of the photovoltaic modules and perform power rating. During EL testing, the photovoltaic modules are powered through the test fixtures, and image data of the photovoltaic modules are collected to detect whether there are any defects inside the photovoltaic modules.

[0004] In existing technologies, test fixtures need to be manually fixed to the frame of photovoltaic modules. When testing the same photovoltaic module, the test fixture is first fixed to the frame of the photovoltaic module, then the connectors of the photovoltaic module are connected to the connectors of the test fixture. Then, the surface electrodes of the test fixture are brought into contact with the IV tester for energization to perform the IV test. After the IV test is completed, the photovoltaic module continues to the EL test station. After the photovoltaic module arrives, it stops moving, and the EL tester is brought into contact with the surface electrodes of the test fixture for energization. Through three start-stop cycles of the photovoltaic module, the area array camera acquires EL images three times to complete the EL test. The IV and EL tests of photovoltaic modules require frequent manual disassembly and reassembly of the test fixture, and frequent plugging and unplugging of the connectors of the photovoltaic module and the test fixture. In addition, the area array camera uses static imaging, resulting in a long test cycle and low test efficiency. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low testing efficiency caused by the need for frequent manual disassembly and reassembly of testing fixtures in the existing photovoltaic module testing technology, thereby providing a photovoltaic module testing device and testing method.

[0006] To address the aforementioned problems, the present invention provides a photovoltaic module testing device, comprising: two robotic arms adapted to be positioned on both sides of a conveyor line for transporting photovoltaic modules; each robotic arm includes a robotic arm and a gripper; the gripper includes a plug-in / plug-out drive, a first clamp, and a test connector; the plug-in / plug-out drive is fixed to the robotic arm; at least one of the first clamp and the test connector is connected to the drive end of the plug-in / plug-out drive; the first clamp is adapted to grip the power connector of the photovoltaic module; the plug-in / plug-out drive drives at least one of the first clamp and the test connector to move, thereby inserting the power connector into the test connector and pulling the power connector out of the test connector; and a testing mechanism adapted to be positioned at the location of the conveyor line, electrically connected to the test connector; a testing area is formed on the conveyor line; and the testing mechanism is adapted to test the photovoltaic modules located in the testing area.

[0007] Optionally, the testing organization includes one or two of the following: an IV testing organization, including an IV tester and a test light source, wherein the IV tester is electrically connected to a test connector, the test light source is set corresponding to the test area, and the test light source is suitable for illuminating the photovoltaic module; and an EL testing organization, including an EL tester and an EL image acquisition unit, wherein the EL tester is electrically connected to a test connector, the EL image acquisition unit is set corresponding to the test area, and the EL image acquisition unit is suitable for acquiring images of the photovoltaic module.

[0008] Optionally, the testing mechanism includes electronic components, with the IV tester and EL tester electrically connected to the test connector via the electronic components, and one of the IV tester and EL tester being made conductive to the test connector by controlling the electronic components.

[0009] Optionally, the robotic arm can move synchronously with the movement of the conveyor line.

[0010] Optionally, the EL image acquisition unit is a linear scan camera.

[0011] Optionally, the gripper also includes a first rotary drive unit, which is connected to the drive end of the plug-in drive and the first clamp. The first rotary drive unit drives the first clamp to move so that the power connector rotates.

[0012] Optionally, the gripper also includes a second rotary drive unit, which is mounted on the robotic arm and connected to the test connector. The second rotary drive unit drives the test connector to rotate.

[0013] Optionally, the photovoltaic module testing device also includes a vision recognition unit, a rear inspection unit, and a controller. The vision recognition unit is suitable for acquiring the three-dimensional posture of the power connector. The rear inspection unit is suitable for being set at the beginning of the conveyor line and for detecting whether there are photovoltaic modules at the beginning of the conveyor line. The controller is electrically connected to the robot, the testing mechanism, the vision recognition unit, and the rear inspection unit.

[0014] Optionally, the test area includes an IV test area, and the photovoltaic module test device also includes a detection element and a controller. The detection element is adapted to be set at a position corresponding to the test light source. The detection element is adapted to detect whether the photovoltaic module has reached the IV test area corresponding to the test light source. The controller is electrically connected to the detection element.

[0015] Optionally, the test area includes an EL test area, and the photovoltaic module test device also includes a front detection element and a controller. The front detection element is adapted to be set at a position corresponding to the EL image acquisition unit. The front detection element is adapted to detect whether the photovoltaic module has reached the EL test area corresponding to the EL image acquisition unit. The controller is electrically connected to the front detection element.

[0016] This invention also provides a photovoltaic module testing method. Using the aforementioned photovoltaic module testing device, the photovoltaic module testing method includes the following steps: Step S10: Controlling the first grippers of two robotic arms to respectively grasp two power connectors of the photovoltaic module on the conveyor line; Step S20: Controlling the insertion and removal drive components of the two robotic arms to drive at least one of the first grippers and the test connectors to move, so that the power connectors are inserted into the test connectors on the robotic arms; Step S30: Controlling the testing mechanism to test the photovoltaic module in the testing area on the conveyor line; Step S40: After the photovoltaic module test is completed, controlling the insertion and removal drive components to drive at least one of the first grippers and the test connectors to move, pulling the power connectors out of the test connectors, and controlling the first grippers to place the power connectors on the photovoltaic body of the photovoltaic module.

[0017] Optionally, before step S10, the photovoltaic module testing method further includes: obtaining a signal indicating whether there is a photovoltaic module at the head of the conveyor line detected by the rear inspection unit; controlling the vision recognition unit to collect the three-dimensional posture of the power connector based on the photovoltaic positioning signal detected by the rear inspection unit; and controlling the conveyor line to stop when the photovoltaic module moves to the gripping position on the conveyor line.

[0018] Optionally, between steps S20 and S30, the photovoltaic module testing method further includes: controlling two robotic arms and the conveyor line to move synchronously, so that the two robotic arms and the photovoltaic module move synchronously to the testing area.

[0019] Optionally, before step S30, the photovoltaic module testing method includes: obtaining a signal indicating whether there is a photovoltaic module in the test area detected by the intermediate detection device; in step S30, controlling the testing mechanism to test the photovoltaic module in the test area on the conveyor line according to the photovoltaic arrival signal detected by the intermediate detection device.

[0020] Optionally, between step S10 and step S20, the photovoltaic module testing method further includes: controlling the first rotary drive unit to drive the first clamp to move, so that the power connector rotates to a first preset angle.

[0021] Optionally, while controlling the first rotary drive unit to drive the first fixture to move, the second rotary drive unit can be controlled to drive the test connector to rotate to a second preset angle.

[0022] Optionally, step S30 includes: Step S31: controlling the test light source of the test mechanism to irradiate the photovoltaic module and controlling the electronic components to make the IV tester of the test mechanism conduct to the test connector, and the IV tester performs IV test on the photovoltaic module; Step S32: after the IV test is completed, controlling the two robotic arms and the conveyor line to move synchronously so that the two robotic arms and the photovoltaic module move synchronously; Step S34: controlling the electronic components to make the EL tester of the test mechanism conduct to the test connector and controlling the EL image acquisition unit of the test mechanism to acquire the signal of the photovoltaic module.

[0023] Optionally, before step S34, step S30 further includes: step S33: obtaining whether the photovoltaic module detected by the front detection device has reached the EL test area; in step S34, according to the photovoltaic arrival signal detected by the front detection device, controlling the electronic components to make the EL tester and the test connector conduct and controlling the EL image acquisition unit to acquire the signal of the photovoltaic module.

[0024] The present invention has the following advantages:

[0025] 1. When testing photovoltaic (PV) modules, the first grippers of the robotic arms on both sides of the conveyor line grasp the power connector of the PV module. Then, a drive mechanism moves at least one of the first grippers and the test connector, causing the power connector to insert into the test connector. The testing mechanism then tests the PV module in the test area. After testing, the drive mechanism moves at least one of the first grippers and the test connector to remove the power connector from the test connector. The first gripper then places the power connector onto the PV module body. This process is repeated to test the PV modules on the conveyor line. The robotic arms of this testing device are positioned on both sides of the conveyor line, and the testing mechanism is located at the location of the conveyor line. By using the robotic arms to grasp only the power connector, testing of the PV module can be achieved during the transport of the PV module. Compared to existing testing methods that install test fixtures on the frame of the PV module, this method reduces the need for test fixtures, increases testing efficiency, reduces process steps, decreases the risk of PV module damage, and saves costs.

[0026] 2. After the IV test is completed, the power supply connected to the test connector on the robotic arm is switched to the EL power supply. The photovoltaic module continues to move, and the linear array camera begins to acquire images. After the entire photovoltaic module passes through the EL image acquisition unit, the linear array camera stops acquiring images and generates images. The EL test is completed through these images. Dynamic imaging is achieved by using several linear array cameras arranged in the gaps of the conveyor line. The EL test image acquisition is completed during the operation of the photovoltaic module, which effectively reduces the equipment area. The photovoltaic module can complete image acquisition without multiple start-stop cycles, resulting in higher testing efficiency and lower cost. Furthermore, dynamic EL testing can reduce the number of testing stations and improve inspection efficiency.

[0027] 3. By controlling the electronic components, one of the IV tester and EL tester can be made to conduct through the test connector, making control simpler. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 A simplified side view of the photovoltaic module testing device and the conveyor line according to an embodiment of the present invention is shown.

[0030] Figure 2 It shows Figure 1 A simplified side view of the photovoltaic modules moving to point B on the conveyor line;

[0031] Figure 3 It shows Figure 1 A top-view schematic diagram of the platform and conveyor line of the photovoltaic module testing device;

[0032] Figure 4 It shows Figure 1 A three-dimensional schematic diagram of the robotic arm of the photovoltaic module testing device;

[0033] Figure 5 It shows Figure 4 A front view schematic diagram of the robotic arm;

[0034] Figure 6 It shows Figure 4 A three-dimensional schematic diagram of the robotic arm from another perspective;

[0035] Figure 7 It shows Figure 4 A first-person perspective stereoscopic diagram of the gripper of the robotic arm and the dual-channel relay of the testing mechanism;

[0036] Figure 8 It shows Figure 7 A front view diagram of the clamping hand and the dual-channel relay;

[0037] Figure 9 It shows Figure 7 A bottom-view diagram showing the clamping hand and the dual-channel relay;

[0038] Figure 10 It shows Figure 7 A top view of the clamping hand and the dual-channel relay;

[0039] Figure 11 It shows Figure 7 A side view of the clamping hand and the dual-channel relay;

[0040] Figure 12 It shows Figure 7 A two-dimensional perspective view of the clamping hand and the dual-channel relay;

[0041] Figure 13 It shows Figure 7 A third-person perspective 3D schematic diagram of the clamping hand and the dual-channel relay;

[0042] Figure 14 It shows Figure 7 A side view of the first rotating module of the gripper;

[0043] Figure 15 A schematic flowchart of a photovoltaic module testing method according to an embodiment of the present invention is shown.

[0044] Explanation of reference numerals in the attached figures:

[0045] 10. Robotic hand; 11. Robotic arm; 12. Gripper; 121. Plug-in / plug-out drive; 122. First gripper; 123. Test connector; 124. First rotary drive unit; 1241. First motor; 1242. First rotary module; 1243. Drive gear; 1244. Driven gear; 1245. Guide rail; 125. Second rotary drive unit; 1251. Second motor; 1252. Second rotary module; 126. Second gripper; 127. Transfer Moving parts; 128. Fixed parts; 13. Mobile chassis; 21. IV testing mechanism; 211. IV tester; 212. Test light source; 22. EL testing mechanism; 221. EL tester; 222. EL image acquisition unit; 23. Dual-channel relay; 30. Vision recognition unit; 41. Rear inspection component; 42. Middle inspection component; 43. Front inspection component; 44. Encoder; 71. Conveyor line; 72. Platform; 80. Photovoltaic module; 81. Power connector. Detailed Implementation

[0046] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] In the existing technology, the test fixture is installed on the end frame of the photovoltaic module. The installation and removal of the test fixture both require production personnel, which results in high labor costs. In addition, the test fixture is far away from the junction box, and the power connector of the junction box cannot be directly connected to the connector of the test fixture. It is necessary to add a test extension cable to connect the power connector of the junction box to the connector of the test fixture. The test extension cable needs to be replaced frequently. In addition to the test fixture, the cost of accessories is high.

[0051] like Figures 1 to 4 and Figure 8 As shown, the photovoltaic module testing device of this embodiment includes: two robotic arms 10 and a testing mechanism. The two robotic arms 10 are adapted to be disposed on both sides of the conveyor line 71 for transporting photovoltaic modules 80. Each robotic arm 10 includes a robotic arm 11 and a gripper 12. The gripper 12 includes a plug-in / plug-out drive 121, a first clamp 122, and a test connector 123. The plug-in / plug-out drive 121 is fixed on the robotic arm 11. The first clamp 122 is connected to the drive end of the plug-in / plug-out drive 121. The first clamp 122 is adapted to grip the power connector 81 of the photovoltaic module 80. The plug-in / plug-out drive 121 drives the first clamp 122 to move so that the power connector 81 is inserted into the test connector 123 and pulled out of the test connector 123. The testing mechanism is adapted to be disposed at the location of the conveyor line 71. The testing mechanism is electrically connected to the test connector 123. A testing area is formed on the conveyor line 71. The testing mechanism is adapted to test the photovoltaic module 80 in the testing area.

[0052] When testing a photovoltaic module 80 using the photovoltaic module testing device of this embodiment, the first gripper 122 of the robotic arms 10 on both sides of the conveyor line 71 grips the power connector 81 of the photovoltaic module 80. Then, the insertion / removal drive 121 drives the first gripper 122 to move, so that the power connector 81 is inserted into the test connector 123. Then, the testing mechanism tests the photovoltaic module 80 in the test area to realize the testing of the photovoltaic module 80. After the test is completed, the insertion / removal drive 121 drives the first gripper 122 to move and pull the power connector out of the test connector 123. The first gripper 122 is controlled to place the power connector 81 on the photovoltaic body of the photovoltaic module 80. In this way, the photovoltaic modules 80 on the conveyor line 71 are tested in sequence. The robotic arms 10 of the aforementioned testing device are set on both sides of the conveyor line 71, and the testing mechanism is set at the location of the conveyor line 71. The testing of the photovoltaic module 80 can be achieved by the robotic arms 10 simply gripping the power connector 81. This allows testing to be carried out during the transmission of the photovoltaic module 80. Compared with the existing testing method of installing test fixtures on the frame of the photovoltaic module 80, the installation of test fixtures can be reduced, the testing efficiency is high, the process steps can be reduced, the risk of damage to the photovoltaic module 80 can be reduced, and costs can be saved.

[0053] It is understood that, as an alternative implementation, the test connector 123 is connected to the drive end of the plug-in / plug-out drive 121, and the plug-in / plug-out drive 121 drives the test connector 123 to move; or, the first clamp 122 is connected to one drive end of the plug-in / plug-out drive 121, and the test connector 123 is connected to the other drive end of the plug-in / plug-out drive 121, and the plug-in / plug-out drive 121 drives the first clamp 122 and the test connector 123 to move simultaneously.

[0054] In existing technologies, the testing fixture uses a probe to press down and connect to the power connector of the junction box. When the probe presses down, it can easily cause internal damage or poor contact to the photovoltaic module, thus affecting the test results and compromising test safety. However, the robotic arm 10 of the aforementioned testing device grasps the power connector 81 and plugs it into the test connector 123, preventing internal damage or poor contact to the photovoltaic module 80 and improving test safety.

[0055] It should be noted that the photovoltaic module 80 includes a photovoltaic body and two junction boxes. Each junction box includes a box body and a power connector 81. The two power connectors 81 are a positive connector and a negative connector, respectively. The photovoltaic body includes solar cells, EVA, backsheet, frame, etc. The photovoltaic body and the robotic arm 11 can both adopt the structure of the existing technology, and will not be described in detail here.

[0056] Specifically, the insertion / removal drive 121 is a cylinder; it can also be a hydraulic cylinder or an electric cylinder, etc. The first clamp 122 includes two grippers and a drive unit, which drives the two grippers to open or close. For example, the drive unit is a finger cylinder, etc.

[0057] In this embodiment, as Figure 1 , Figure 2 and Figure 7 As shown, the testing mechanism includes one or both of the following mechanisms: an IV testing mechanism 21 and an EL testing mechanism 22. The IV testing mechanism 21 includes an IV tester 211 and a test light source 212. The IV tester 211 is electrically connected to the test connector 123. The test light source 212 is positioned corresponding to the test area and is suitable for illuminating the photovoltaic module 80. The EL testing mechanism 22 includes an EL tester 221 and an EL image acquisition unit 222. The EL tester 221 is electrically connected to the test connector 123. The EL image acquisition unit 222 is positioned corresponding to the test area and is suitable for acquiring images of the photovoltaic module 80. When the testing mechanism includes both the IV testing mechanism 21 and the EL testing mechanism 22, different tests can be performed on the same photovoltaic module 80 within the test area, resulting in high testing efficiency.

[0058] Specifically, both IV tester 211 and EL tester 221 are mounted on the robotic arm 11. It can be understood that IV tester 211 and EL tester 221 can also be mounted on the ground on one side of the conveyor line 71, etc.

[0059] It should be noted that the IV tester 211, the test light source 212, and the EL tester 221 can all adopt the existing structure, and will not be described in detail here.

[0060] In this embodiment, as Figure 1 , Figure 2 and Figure 7 As shown, the testing mechanism includes electronic components. The IV tester 211 and the EL tester 221 are electrically connected to the test connector 123 via these electronic components. By controlling the electronic components, one of the IV tester 211 and the EL tester 221 can be switched on with the test connector 123. Controlling the electronic components to switch one of the IV tester 211 and the EL tester 221 on with the test connector 123 simplifies control. Specifically, the electronic component is a dual-channel relay 23. By controlling the dual-channel relay 23, the testing stages are automatically switched, resulting in high testing efficiency. It can be understood that, as an alternative implementation, the electronic components include two switches. The IV tester 211 and the test connector 123 are connected to form one circuit, and the EL tester 221 and the test connector 123 form another circuit. Each circuit has one switch, and by controlling the two switches, one of the IV tester 211 and the EL tester 221 can be switched on with the test connector 123.

[0061] In this embodiment, the robotic arm 10 moves synchronously with the conveyor line 71, thereby enabling the robotic arm 10 to move synchronously with the photovoltaic module 80, allowing for different tests to be performed on the same photovoltaic module 80 sequentially, resulting in high testing efficiency. It is understood that, as an alternative implementation, when the testing mechanism only includes the IV testing mechanism 21, the robotic arm 10 is fixed to one side of the conveyor line 71, in which case the robotic arm 10 cannot move synchronously with the conveyor line 71.

[0062] Specifically, such as Figures 3 to 6 As shown, the photovoltaic module testing device also includes a platform 72, on which a robotic arm 10 is movably mounted. The robotic arm 10 also includes a movable chassis 13, which is movably mounted on the platform 72. The robotic arm 11, the IV tester, and the EL tester are all mounted on the movable chassis 13. It is understood that, as an alternative implementation, the platform 72 may be omitted, and the robotic arm 10 may be movably mounted on the ground.

[0063] It should be noted that the movement of the movable chassis 13 is driven by a linear drive mechanism, such as a lead screw and nut mechanism. Alternatively, a drive wheel and a drive mechanism can be set on the movable chassis 13, and the drive mechanism drives the drive wheel to rotate, thereby moving the movable chassis 13. Of course, any structure that can drive the movement of the movable chassis 13 is acceptable and is not limited to this. It will not be elaborated on here.

[0064] In this embodiment, the EL image acquisition unit 222 is a line array camera. While the photovoltaic module 80 is being transported on the conveyor line 71, the line array camera dynamically acquires images of the photovoltaic module 80, improving the production cycle time of the testing process and reducing camera costs. Dynamic imaging is achieved by arranging several line array cameras in the gaps between the conveyor lines. EL test image acquisition is completed during the operation of the photovoltaic module, effectively reducing equipment area. Image acquisition can be completed without multiple start-stop cycles of the photovoltaic module, resulting in higher testing efficiency and lower costs. Furthermore, dynamic EL testing can reduce the number of testing stations and improve inspection efficiency. Specifically, the line array camera is a near-infrared line array camera, etc.

[0065] It is understood that, as an alternative implementation, the EL image acquisition unit 222 can be an area array camera. For example, multiple rows of area array cameras can be used for simultaneous imaging. In this case, the photovoltaic module 80 and the robot arm 10 need to undergo static testing. After the test is completed, the robot arm 10 pulls the power connector 81 out of the test connector 123, disconnecting the power connector 81 of the photovoltaic module 80 from the test connector 123 of the robot arm 10. Then, the robot arm 10 places the power connector 81 on the photovoltaic body. However, the testing process will take more time, and the camera cost will increase. Alternatively, a single row of area array cameras can be used, and the photovoltaic module 80 moves to form images three times. However, the corresponding testing process takes longer than the imaging method using multiple rows of area array cameras.

[0066] In this embodiment, as Figures 7 to 13As shown, the clamping hand 12 also includes a first rotation drive unit 124, which is connected to the drive end of the insertion / removal drive unit 121 and the first clamp 122. The first rotation drive unit 124 drives the first clamp 122 to rotate, thereby rotating the power connector 81. When there is misalignment between the power connector 81 and the test connector 123 held by the first clamp 122, causing them to not fit together, the first rotation drive unit 124 drives the first clamp 122 to rotate, until the power connector 81 and the test connector 123 can fit together. When there is no misalignment between the power connector 81 and the test connector 123 held by the first clamp 122, the first rotation drive unit 124 does not need to be controlled. The first rotation drive unit 124 can meet the insertion requirements of power connectors 81 at different angles. Specifically, the first rotary drive unit 124 includes a first motor 1241 and a first rotary module 1242. The first motor 1241 is connected to the first clamp 122 through the first rotary module 1242. A movable part 127 is fixed on the drive end of the insertion and removal drive unit 121, and the first motor 1241 is mounted on the movable part 127.

[0067] Specifically, such as Figure 14 As shown, the first rotating module 1242 includes a driving gear 1243 and a driven gear 1244. The driving gear 1243 is connected to the first motor 1241, and the driven gear 1244 meshes with the driving gear 1243. A first clamp 122 is mounted on the driven gear 1244. The first motor 1241 drives the driving gear 1243 to rotate, which in turn drives the driven gear 1244 to rotate, thereby causing the first clamp 122 to rotate around its clamping center line, which in turn drives the power connector 81 to rotate. The driven gear 1244 is preferably a sector gear to avoid interference with other parts. A guide mechanism is provided between the driven gear 1244 and the moving member 127 to guide the rotation of the driven gear 1244. For example, the guide mechanism includes a guide rail 1245 and a slide groove. One of the driven gear 1244 and the moving member 127 is provided with a guide rail 1245 and the other is provided with a slide groove. The guide rail 1245 slides in the slide groove. Both the guide rail 1245 and the slide groove are arc-shaped.

[0068] In this embodiment, the gripper 12 further includes a second rotation drive unit 125, which is disposed on the robotic arm 11. The second rotation drive unit 125 is connected to the test connector 123, and drives the test connector 123 to move so that the test connector 123 rotates. When the power connector 81 and test connector 123 held by the first clamp 122 are misaligned and cannot be inserted, the first clamp 122 is driven to move by the first rotary drive unit 124, while the second rotary drive unit 125 drives the test connector 123 to move. This causes the power connector 81 and test connector 123 to rotate until they can be inserted. For example, if only the first rotary drive unit 124 is used, it takes 60 degrees of rotation to insert the power connector 81 and test connector 123. With the first rotary drive unit 124 and the second rotary drive unit 125, the first rotary drive unit 124 and the second rotary drive unit 125 can each rotate 30 degrees simultaneously to insert the power connector 81 and test connector 123. This reduces the rotation time by half and improves testing efficiency.

[0069] It is understood that, as an alternative implementation, only the first rotation drive unit 124 may be provided without the second rotation drive unit 125, or only the second rotation drive unit 125 may be provided without the first rotation drive unit 124.

[0070] Specifically, the gripper 12 also includes a second clamp 126, which is suitable for clamping the test connector 123. The second rotation drive unit 125 includes a second motor 1251 and a second rotation module 1252. The second motor 1251 is connected to the second clamp 126 through the second rotation module 1252. The second motor 1251 can drive the second clamp 126 to rotate around its clamping center line through the second rotation module 1252. The fixing part of the insertion and removal drive unit 121 is provided with a fixing member 128. The second motor 1251 is mounted on the fixing member 128. The second rotation module 1252 has the same structure as the first rotation module 1242, and will not be described in detail here.

[0071] In this embodiment, as Figure 1 , Figure 2 , Figure 4 and Figure 7As shown, the photovoltaic module testing device also includes a vision recognition unit 30, a rear detection element 41, and a controller. The vision recognition unit 30 is adapted to acquire the three-dimensional posture of the power connector 81. The rear detection element 41 is adapted to be installed at the beginning of the conveyor line 71 and is adapted to detect whether there is a photovoltaic module 80 at the beginning of the conveyor line 71. The controller is electrically connected to the robot arm 10, the testing mechanism, the vision recognition unit 30, and the rear detection element 41. When the rear detection element 41 detects a photovoltaic module 80 at the beginning of the conveyor line 71, the rear detection element 41 sends the detected photovoltaic arrival signal to the controller. The controller controls the vision recognition unit 30 to acquire the three-dimensional posture of the power connector 81 based on the photovoltaic arrival signal detected by the rear detection element 41. Then, the controller controls the robot arm 10 to grasp the power connector 81 based on the three-dimensional posture of the power connector 81 acquired by the vision recognition unit 30, thereby improving the grasping accuracy of the power connector 81. Specifically, the vision recognition unit 30 is a stereo camera, etc., and the rear detection element 41 is a rear photoelectric switch or a front proximity switch, etc. It should be noted that a stereo camera can also be called a line structured light sensor.

[0072] In this embodiment, the test area includes an IV test area. The photovoltaic module testing device also includes a detection element 42 and a controller. The detection element 42 is adapted to be positioned at a location corresponding to the test light source 212. The detection element 42 is adapted to detect whether the photovoltaic module 80 has reached the IV test area corresponding to the test light source 212. The controller is electrically connected to the detection element 42. When the detection element 42 detects a photovoltaic module 80 in the IV test area, the detection element 42 sends the detected photovoltaic arrival signal to the controller. The controller controls the test light source 212 to irradiate the photovoltaic module 80 and controls the electronic components to make the IV tester 211 of the testing mechanism conduct with the test connector 123 according to the photovoltaic arrival signal detected by the detection element 42. The IV tester 211 performs IV testing on the photovoltaic module 80. The detection element 42 can accurately detect the arrival of the photovoltaic module 80 in the IV test area, realizing the automation of IV testing without the need for manual control of electronic components. Specifically, the detection element 42 is a photoelectric switch or a proximity switch, etc.

[0073] In this embodiment, the test area includes an EL test area, and the photovoltaic module testing device further includes a front detection element 43 and a controller. The front detection element 43 is adapted to be positioned at a location corresponding to the EL image acquisition unit 222. The front detection element 43 is adapted to detect whether the photovoltaic module 80 has arrived at the EL test area corresponding to the EL image acquisition unit 222. The controller is electrically connected to the front detection element 43. When the front detection element 43 detects a photovoltaic module 80 in the EL test area, the front detection element 43 sends the detected photovoltaic arrival signal to the controller. The controller controls the electronic components to make the EL tester 221 conduct with the test connector 123 and controls the EL image acquisition unit 222 to acquire the image of the photovoltaic module 80 based on the photovoltaic arrival signal detected by the front detection element 43. The front detection element 43 can accurately detect the arrival of the photovoltaic module 80 in the EL test area, realizing the automation of EL testing without the need for manual control of electronic components. Specifically, the front detection element 43 is a front photoelectric switch or a front proximity switch, etc.

[0074] In this embodiment, the conveyor line 71 includes a first conveyor line and a second conveyor line arranged along the transmission direction of the photovoltaic module 80, and the front detection element 43 is disposed between the first conveyor line and the second conveyor line.

[0075] It should be noted that the "before" and "after" mentioned above are based on the orientation of the transmission direction, which is in... Figure 1 and Figure 2 The middle refers to the direction from left to right. Figure 1 and Figure 2 The dashed lines in the diagram represent electrical connections between various components.

[0076] The following is combined Figure 1 , Figure 2 , Figure 8 and Figure 15 The working process of the photovoltaic module testing device is explained below:

[0077] Conveyor line 71 starts operating. The photoelectric switch at point A detects the arrival of photovoltaic module 80. The PLC controls conveyor line 71 to stop, causing photovoltaic module 80 to stop at point A. The PLC controls the structured light sensor on the line to activate and scan the three-dimensional orientation of the power connectors 81 in the junction boxes on both sides of photovoltaic module 80. The PLC analyzes the position and angle information of the power connectors 81. Based on the three-dimensional information of the power connectors 81, the PLC controls the grippers 12 of the robotic arms 10 on both sides of conveyor line 71 to move above the junction boxes and grip the power connectors 81. Then, the corresponding rotating module is driven by a motor to rotate, causing the power connectors 81 and test connectors 123 to rotate. After rotating to a fixed angle, the PLC controls the cylinder to actuate, causing the power connector 81 to connect with the test connector 123. Then, the photovoltaic module 80 and the robotic arm 10 move synchronously to point B. The photoelectric switch at point B detects the photovoltaic module 80, the PLC controls the conveyor line 71 to stop, and the PLC controls the dual-channel relay 23 to connect the IV tester and the test light source 212 to perform IV testing on the photovoltaic module 80. After the IV test is completed, the photovoltaic module 80 and the robotic arm 10 move synchronously. The front photoelectric switch at point C senses the photovoltaic module 80, and the PLC controls the dual-channel relay 23 to connect the EL tester and the camera to the encoder 44. The machine starts to acquire images of the photovoltaic module 80, and the camera acquisition speed is the same as that of the conveyor line 71. When the photovoltaic module 80 has completely passed point C, the image acquisition for the EL test is completed. After the EL test is completed, the PLC controls the cylinder to extend, and then controls the robot arm 10 to place the power connector 81 on the photovoltaic module. The photovoltaic module 80 moves to the next process. Then, the gripper 12 of the robot arm 10 resets and the robot arm 10 moves to the initial position. This process is repeated to inspect the photovoltaic modules 80 on the conveyor line 71 in sequence. Before the final inspection test, the photovoltaic module 80 is identified and positioned by the vision recognition unit 30, and the power connector 81 of the junction box is clamped. The first clamp 122 at one end of the hand 12 grips the power connector 81 of the junction box, and the second clamp 126 at the other end of the hand 12 is equipped with a test connector 123, which automatically realizes the power connection without the need to install test fixtures. Furthermore, the test connector 123 is electrically connected to the IV tester and EL tester through a dual-channel relay 23. The dual-channel relay 23 is controlled by the PLC to connect the test connector 123 to the IV tester or the EL tester, realizing intelligent switching between different test instruments. This enables the unmanned and intelligent IV and EL testing of the photovoltaic module 80, reducing unnecessary procedures, saving costs, and improving the test cycle time.

[0078] It should be noted that the encoder 44 actually converts the displacement signal of the photovoltaic module 80 into an electrical signal. By connecting with the camera, the camera can be controlled to take an image once every 0.1mm movement of the photovoltaic module 80 (this data is for example), so that the image of the entire photovoltaic module 80 can be completely captured during the movement of the photovoltaic module 80.

[0079] This invention also provides a method for testing photovoltaic modules, such as... Figures 1 to 4 and Figure 8 As shown, using the photovoltaic module testing device described above, the photovoltaic module testing method includes the following steps:

[0080] Step S10: Control the first gripper 122 of the two robotic arms 10 to grab the two power connectors 81 of the photovoltaic module 80 on the conveyor line 71 respectively;

[0081] Step S20: Control the insertion and removal drive 121 of the two robotic arms 10 to drive the first gripper 122 to move so that the power connector 81 is inserted into the test connector 123 on the robotic arm 10;

[0082] Step S30: Control the testing mechanism to test the photovoltaic module 80 in the testing area on the conveyor line 71;

[0083] Step S40: After the photovoltaic module 80 is tested, the plug-in drive 121 is controlled to drive the first clamp 122 to move, pull out the power connector from the test connector 123, and control the first clamp 122 to place the power connector 81 on the photovoltaic body of the photovoltaic module 80.

[0084] Robotic arms 10 are positioned on both sides of the conveyor line 71, and the testing mechanism is located at the position of the conveyor line 71. The testing of the photovoltaic module 80 can be achieved by the robotic arms 10 simply gripping the power connector 81. This allows testing to be performed during the transmission of the photovoltaic module 80. Compared with the existing technology of installing test fixtures on the frame of the photovoltaic module 80, this method can reduce the installation of test fixtures, improve testing efficiency, reduce process steps, reduce the risk of damage to the photovoltaic module 80, and save costs.

[0085] In this embodiment, before step S10, the photovoltaic module testing method further includes: obtaining a signal from the rear detection unit 41 indicating whether there is a photovoltaic module 80 on the head of the conveyor line 71; controlling the vision recognition unit 30 to collect the three-dimensional posture of the power connector 81 based on the photovoltaic positioning signal detected by the rear detection unit 41; controlling the conveyor line 71 to stop when the photovoltaic module 80 moves to the gripping position on the conveyor line 71, and the robot arm 10 gripping the power connector 81 at the gripping position to improve the gripping accuracy of the power connector 81.

[0086] When the gripping position is not within the test area, in this embodiment, between steps S20 and S30, the photovoltaic module testing method further includes: controlling the two robotic arms 10 and the conveyor line 71 to move synchronously, so that the two robotic arms 10 and the photovoltaic module 80 move synchronously to the test area, facilitating the testing of the photovoltaic module 80. When the testing mechanism includes the IV testing mechanism 21 and the EL testing mechanism 22, within the test area, the robotic arms 10 move synchronously with the movement of the conveyor line 71, thereby enabling the robotic arms 10 to move synchronously with the movement of the photovoltaic module 80, allowing different tests to be performed on the same photovoltaic module 80 sequentially, resulting in high testing efficiency.

[0087] It is understood that, as an alternative implementation, when the testing mechanism only includes IV testing mechanism 21, the robot arm 10 is fixed on one side of the conveyor line 71. At this time, the robot arm 10 cannot move synchronously with the movement of the conveyor line 71, and the gripping position is within the testing area.

[0088] In this embodiment, before step S30, the photovoltaic module testing method includes: obtaining a signal indicating whether a photovoltaic module 80 is present in the test area detected by the intermediate detection element 42; in step S30, the testing mechanism is controlled to test the photovoltaic module 80 in the test area on the conveyor line 71 based on the photovoltaic arrival signal detected by the intermediate detection element 42. The intermediate detection element 42 can accurately detect the arrival of the photovoltaic module 80 in the IV test area, achieving automation of the IV test without the need for manual control of electronic components.

[0089] In this embodiment, between steps S10 and S20, the photovoltaic module testing method further includes: controlling the first rotation drive unit 124 to drive the first clamp 122 to move, so that the power connector 81 rotates to a first preset angle. When there is misalignment between the power connector 81 held by the first clamp 122 and the test connector 123, causing them to not fit together, the first rotation drive unit 124 drives the first clamp 122 to rotate, until the power connector 81 and the test connector 123 can fit together; when there is no misalignment between the power connector 81 held by the first clamp 122 and the test connector 123, the first rotation drive unit 124 does not need to be controlled. The first rotation drive unit 124 can meet the insertion requirements of power connectors 81 at different angles.

[0090] In this embodiment, while controlling the first rotary drive unit 124 to drive the first clamp 122 to move, the second rotary drive unit 125 is controlled to drive the test connector 123 to rotate to a second preset angle. When the power connector 81 and the test connector 123 held by the first clamp 122 are misaligned and cannot be inserted, the first rotary drive unit 124 drives the first clamp 122 to move, and the second rotary drive unit 125 drives the test connector 123 to move, thereby rotating the power connector 81 and the test connector 123 respectively, until they can be inserted. For example, when only the first rotary drive unit 124 is set, it is necessary to rotate 60 degrees to insert the power connector 81 and the test connector 123. When the first rotary drive unit 124 and the second rotary drive unit 125 are set, the first rotary drive unit 124 and the second rotary drive unit 125 can be inserted by rotating 30 degrees simultaneously, which reduces the rotation time by half and improves the testing efficiency.

[0091] In this embodiment, step S30 includes: Step S31: controlling the test light source 212 of the testing mechanism to illuminate the photovoltaic module 80 and controlling electronic components to make the IV tester 211 of the testing mechanism conductive with the test connector 123, and the IV tester 211 performs IV testing on the photovoltaic module 80; Step S32: after the IV test is completed, controlling the two robotic arms 10 and the conveyor line 71 to move synchronously, so that the two robotic arms 10 and the photovoltaic module 80 move synchronously; Step S34: controlling electronic components to make the EL tester 221 of the testing mechanism conductive with the test connector 123 and controlling the EL image acquisition unit 222 of the testing mechanism to acquire the image of the photovoltaic module 80. When testing the photovoltaic module 80, the photovoltaic module 80 is first subjected to IV testing, and after the IV test is completed, the photovoltaic module 80 is subjected to EL testing. Different tests can be performed on the same photovoltaic module 80 in sequence, which has high testing efficiency.

[0092] It is understandable that, as an alternative implementation, the photovoltaic module 80 can be tested with EL first, and then the photovoltaic module 80 can be tested with IV. In this case, the positions of the test light source 212 and the EL image acquisition unit 222 need to be adjusted.

[0093] In this embodiment, before step S34, step S30 further includes: step S33: obtaining whether the photovoltaic module 80 detected by the front detection unit 43 has reached the EL test area; in step S34, based on the photovoltaic arrival signal detected by the front detection unit 43, the electronic components are controlled to make the EL tester 221 and the test connector 123 conduct and to control the EL image acquisition unit 222 to acquire the image of the photovoltaic module 80. The front detection unit 43 can accurately detect that the photovoltaic module 80 has reached the EL test area, realizing the automation of EL testing without the need for manual control of electronic components.

[0094] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0095] 1. The power connector 81 of the junction box and the test connector 123 on the robot arm 10 are automatically connected by the robot arm 10. This achieves two goals: first, to complete the test automatically and realize unmanned operation; second, to reduce the manual installation and removal of test fixtures, reduce the risk of component damage, and save costs.

[0096] 2. The IV tester and the EL tester share a test connector 123 on the robotic arm 10, that is, the test connector 123 is integrated, and different test procedures are completed by intelligent switching through the control relay. The system has a high degree of integration and high testing efficiency.

[0097] 3. EL testing uses a line scan camera for dynamic imaging, which reduces the cost of the line scan camera, increases the production cycle time per stage, reduces EL testing time, improves testing efficiency, and makes testing more intelligent.

[0098] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A photovoltaic module testing device, characterized in that, include: Two robotic arms (10) are adapted to be positioned on either side of a conveyor line (71) for transmitting photovoltaic modules (80). Each robotic arm (10) includes a robotic arm (11) and a gripper (12). The gripper (12) includes a plug-in / plug-out drive (121), a first clamp (122), and a test connector (123). The plug-in / plug-out drive (121) is fixed to the robotic arm (11). At least one of the first clamp (122) and the test connector (123) is connected to the plug-in / plug-out drive (121). The first clamp (122) is adapted to hold the power connector (81) of the photovoltaic module (80), and the insertion / removal drive (121) drives at least one of the first clamp (122) and the test connector (123) to move so that the power connector (81) is inserted into the test connector (123) and pulled out of the test connector (123). The robot (10) moves synchronously with the movement of the conveyor line (71). The gripper (12) includes a first rotary drive unit (124) and a second rotary drive unit (125). The first rotary drive unit (124) is connected to the drive end of the plug-in drive unit (121) and the first clamp (122). The first rotary drive unit (124) drives the first clamp (122) to move so that the power connector (81) rotates. The second rotary drive unit (125) is disposed on the robotic arm (11). The second rotary drive unit (125) is connected to the test connector (123). The second rotary drive unit (125) drives the test connector (123) to move so that the test connector (123) rotates. The testing mechanism is adapted to be set at the location of the conveyor line (71), the testing mechanism is electrically connected to the testing connector (123), a testing area is formed on the conveyor line (71), and the testing mechanism is adapted to test the photovoltaic module (80) in the testing area.

2. The photovoltaic module testing device according to claim 1, characterized in that, The testing facility includes one or two of the following: IV testing mechanism (21) includes IV tester (211) and test light source (212). The IV tester (211) is electrically connected to the test connector (123). The test light source (212) is set corresponding to the test area and is suitable for irradiating the photovoltaic module (80). The EL testing unit (22) includes an EL tester (221) and an EL image acquisition unit (222). The EL tester (221) is electrically connected to the test connector (123). The EL image acquisition unit (222) is set in relation to the test area and is adapted to acquire images of the photovoltaic module (80).

3. The photovoltaic module testing device according to claim 2, characterized in that, The testing mechanism includes electronic components. The IV tester (211) and the EL tester (221) are electrically connected to the test connector (123) through the electronic components. By controlling the electronic components, one of the IV tester (211) and the EL tester (221) can be connected to the test connector (123).

4. The photovoltaic module testing device according to claim 2, characterized in that, The EL image acquisition unit (222) is a linear array camera.

5. The photovoltaic module testing apparatus according to any one of claims 1 to 3, characterized in that, The photovoltaic module testing device further includes a vision recognition unit (30), a rear detection unit (41), and a controller. The vision recognition unit (30) is adapted to acquire the three-dimensional posture of the power connector (81). The rear detection unit (41) is adapted to be set at the head of the conveyor line (71). The rear detection unit (41) is adapted to detect whether there is a photovoltaic module (80) at the head of the conveyor line (71). The controller is electrically connected to the robot (10), the testing mechanism, the vision recognition unit (30), and the rear detection unit (41).

6. The photovoltaic module testing apparatus according to claim 2 or 3, characterized in that, The test area includes an IV test area. The photovoltaic module test device also includes a detection element (42) and a controller. The detection element (42) is adapted to be set at a position corresponding to the test light source (212). The detection element (42) is adapted to detect whether the photovoltaic module (80) has reached the IV test area corresponding to the test light source (212). The controller is electrically connected to the detection element (42).

7. The photovoltaic module testing apparatus according to claim 2 or 3, characterized in that, The test area includes an EL test area. The photovoltaic module test device also includes a front detection element (43) and a controller. The front detection element (43) is adapted to be set at a position corresponding to the EL image acquisition unit (222). The front detection element (43) is adapted to detect whether the photovoltaic module (80) has reached the EL test area corresponding to the EL image acquisition unit (222). The controller is electrically connected to the front detection element (43).

8. A method for testing photovoltaic modules, characterized in that, Using the photovoltaic module testing apparatus according to any one of claims 1 to 7, the photovoltaic module testing method includes the following steps: Step S10: Control the first gripper (122) of the two robotic arms (10) to grab the two power connectors (81) of the photovoltaic module (80) on the conveyor line (71); Step S20: Control the insertion and removal drive (121) of the two robotic arms (10) to drive at least one of the first clamp (122) and the test connector (123) to move so that the power connector (81) is inserted into the test connector (123); Step S30: Control the testing mechanism to test the photovoltaic modules (80) in the testing area on the conveyor line (71); Step S40: After the photovoltaic module (80) is tested, the plug-in drive (121) is controlled to drive at least one of the first clamp (122) and the test connector (123) to move, and the power connector is pulled out from the test connector (123). The first clamp (122) is controlled to place the power connector (81) on the photovoltaic body of the photovoltaic module (80).

9. The photovoltaic module testing method according to claim 8, characterized in that, Prior to step S10, the photovoltaic module testing method further includes: The signal detected by the post-detection unit (41) indicates whether there is a photovoltaic module (80) at the head of the conveyor line (71); The vision recognition unit (30) is controlled to collect the three-dimensional posture of the power connector (81) based on the photovoltaic positioning signal detected by the post-detection unit (41); When the photovoltaic module (80) moves to the gripping position on the conveyor line (71), the conveyor line (71) is controlled to stop.

10. The photovoltaic module testing method according to claim 8, characterized in that, Between step S20 and step S30, the photovoltaic module testing method further includes: Control the two robotic arms (10) and the conveyor line (71) to move synchronously, so that the two robotic arms (10) and the photovoltaic module (80) move synchronously to the test area.

11. The photovoltaic module testing method according to claim 8, characterized in that, Before step S30, the photovoltaic module testing method includes: acquiring a signal from the detection unit (42) indicating whether there is a photovoltaic module (80) in the test area; In step S30, the testing mechanism is controlled to test the photovoltaic module (80) in the test area on the conveyor line (71) according to the photovoltaic arrival signal detected by the detection device (42).

12. The photovoltaic module testing method according to claim 8, characterized in that, Between step S10 and step S20, the photovoltaic module testing method further includes: The first rotary drive unit (124) is controlled to drive the first clamp (122) to move, so that the power connector (81) rotates to a first preset angle.

13. The photovoltaic module testing method according to claim 12, characterized in that, While controlling the first rotary drive unit (124) to drive the first clamp (122) to move, the second rotary drive unit (125) is controlled to drive the test connector (123) to rotate to the second preset angle.

14. The photovoltaic module testing method according to claim 8, characterized in that, Step S30 includes: Step S31: Control the test light source (212) of the test mechanism to irradiate the photovoltaic module (80) and control the electronic components to make the IV tester (211) of the test mechanism conduct to the test connector (123), and the IV tester (211) performs IV test on the photovoltaic module (80); Step S32: After the IV test is completed, control the two robotic arms (10) and the conveyor line (71) to move synchronously, so that the two robotic arms (10) and the photovoltaic module (80) move synchronously; Step S34: Control the electronic components to make the EL tester (221) of the test mechanism conduct with the test connector (123) and control the EL image acquisition unit (222) of the test mechanism to acquire the signal of the photovoltaic module (80).

15. The photovoltaic module testing method according to claim 14, characterized in that, Before step S34, step S30 further includes: Step S33: Determine whether the photovoltaic module (80) detected by the pre-testing device (43) has reached the EL test area; In step S34, the electronic components are controlled to make the EL tester (221) and the test connector (123) conduct according to the photovoltaic arrival signal detected by the front detection unit (43) and the EL image acquisition unit (222) is controlled to acquire the signal of the photovoltaic module (80).

Images