Photovoltaic cell string testing device
The photovoltaic cell string testing device uses a telescopic gripping mechanism and a robotic arm assembly to test photovoltaic cell strings in situ, solving the problem of low testing efficiency and achieving efficient and safe photovoltaic cell string testing.
Patent Information
- Application Number
- CN202422823512.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2034-11-19
AI Technical Summary
The existing photovoltaic cell string inspection process is labor-intensive, poses safety hazards, and is inefficient. The multiple handling steps of the robotic arm also affect the inspection efficiency.
A photovoltaic cell string testing device is adopted, which uses a telescopic gripping mechanism and a robotic arm assembly to grip the photovoltaic cell string in place and conducts the test by contacting the welding strip with the electrode assembly, thereby reducing the horizontal movement steps.
It improves testing efficiency, is applicable to photovoltaic cell strings of different sizes, and reduces labor intensity and safety hazards.
Smart Images
Figure CN223798683U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery testing technology, and more specifically, to a photovoltaic cell string testing device. Background Technology
[0002] In the production of photovoltaic modules, photovoltaic cells need to be wired together to form photovoltaic strings. After welding, EL (electroluminescence) testing is required to ensure that the photovoltaic strings are free from defects such as incomplete soldering, microcracks, and over-soldering. Solder strips are formed on both sides of the welded areas of the photovoltaic string. The welded photovoltaic string is moved to an external testing device, and the electrodes of the external testing device are brought into contact with the solder strips of the photovoltaic string for testing.
[0003] In existing photovoltaic (PV) cell string testing processes, manually handling the PV cell strings is labor-intensive, poses safety hazards, and is inefficient. Robotic arms are typically used to move the PV cell strings to testing equipment, but existing robotic arms involve multiple movement steps, affecting testing efficiency. Utility Model Content
[0004] To overcome the problem of low detection efficiency of photovoltaic cell strings in the prior art, this utility model provides a photovoltaic cell string testing device that can reduce the number of moving steps during the testing process, thereby improving the detection efficiency.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a photovoltaic cell string testing device, wherein the photovoltaic cell string has solder strips for power-on detection, the testing device includes a mounting bracket, the mounting bracket is connected to a telescopic gripping mechanism for gripping the photovoltaic cell string, both sides of the telescopic gripping mechanism are provided with robotic arm assemblies connected to the mounting bracket, the robotic arm assemblies are connected to electrode assemblies, and the robotic arm assemblies are used to drive the electrode assemblies to contact the solder strips of the photovoltaic cell string for testing.
[0006] In this invention, a telescopic gripping mechanism lifts the photovoltaic cell string from its original position, and then a robotic arm assembly brings the electrode assembly into contact with the solder strips of the photovoltaic cell string, enabling testing. After testing, the photovoltaic cell string is lowered back to its original position. Since there is no need to move the photovoltaic cell string horizontally or place it on external equipment for testing, the number of movement steps during the testing process is reduced, thereby improving testing efficiency.
[0007] Furthermore, the robotic arm assembly includes a fixed arm, a moving arm, and a drive motor. One end of the fixed arm is connected to the mounting bracket, and the other end of the fixed arm is connected to the fixed end of the drive motor. The electrode assembly includes an upper electrode and a lower electrode. The upper electrode is fixedly connected to the fixed arm or the mounting bracket, and the lower electrode is fixedly connected to the moving arm. The output shaft of the drive motor is connected to the moving arm to drive the moving arm to rotate the lower electrode in a direction closer to or further away from the photovoltaic cell string.
[0008] In this solution, the drive motor can drive the moving arm to rotate around the fixed arm, thereby moving the lower electrode.
[0009] Furthermore, the upper electrode is fixedly connected to the fixed arm and located on the upper side of the solder strip of the photovoltaic cell string, and the lower electrode is fixedly connected to the moving arm and located on the lower side of the solder strip of the photovoltaic cell string.
[0010] In this design, the upper and lower electrodes can clamp the upper and lower sides of the solder strip of the photovoltaic cell string, and the lower electrode can be driven to contact the lower side of the solder strip of the photovoltaic cell string through the moving arm.
[0011] Furthermore, the telescopic gripping mechanism includes a telescopic component and a suction cup component. The fixed end of the telescopic component is fixedly connected to the mounting bracket, and the movable end of the telescopic component is fixedly connected to the suction cup component.
[0012] In this solution, the telescopic component can drive the suction cup component to move up and down, and the suction cup component can grasp the photovoltaic cell string.
[0013] Furthermore, the suction cup component includes a mounting plate and multiple suction cup bodies. The mounting plate is fixedly connected to the movable end of the telescopic component, and each suction cup body is fixedly connected to the mounting plate.
[0014] In this solution, the mounting plate facilitates the assembly of multiple suction cup bodies, thereby improving the gripping ability of photovoltaic cell strings.
[0015] Furthermore, the telescopic component is an electric push rod, a telescopic cylinder, or a telescopic hydraulic cylinder.
[0016] Furthermore, the robotic arm assembly is slidably connected to the mounting bracket.
[0017] In this solution, the position of the robotic arm assembly on the mounting frame can be adjusted via a sliding connection, thus making it suitable for photovoltaic cell strings of different sizes.
[0018] Furthermore, the mounting bracket includes a main frame and an intermediate connector, the upper end of the intermediate connector being fixedly connected to the main frame, and the lower end of the intermediate connector being fixedly connected to the fixed end of the telescopic component.
[0019] In this design, an intermediate connector is used to facilitate the disassembly and assembly of the telescopic components.
[0020] Furthermore, the intermediate connector has a sliding groove on its side, the upper end of the fixing arm is installed in the sliding groove, and a locking member is also included, which is used to fix the fixing arm to the sliding groove.
[0021] In this solution, a groove is provided in the intermediate connector to facilitate the sliding connection of the robotic arm assembly, thereby adjusting the position of the robotic arm assembly.
[0022] Furthermore, the robotic arm assembly is equipped with sensors for detecting the position of the photovoltaic cell string.
[0023] In this solution, the position of the photovoltaic cell string can be detected by sensors.
[0024] Compared with the prior art, the beneficial effects of this utility model are:
[0025] I. This utility model discloses a photovoltaic cell string testing device. A telescopic gripping mechanism lifts the photovoltaic cell string from its original position, and a robotic arm assembly brings the electrode assembly into contact with the solder strips of the photovoltaic cell string, enabling testing. After testing, the photovoltaic cell string is lowered back to its original position. Since there is no need to move the photovoltaic cell string horizontally or place it on external equipment for testing, the number of movement steps during the testing process is reduced, thereby improving testing efficiency.
[0026] Second, in this utility model, since the robotic arm assembly and the mounting frame are slidably connected and fixed with locking components, the distance between the two robotic arm assemblies can be adjusted, thereby making the testing device suitable for testing photovoltaic cell strings of different sizes and lengths. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of the photovoltaic cell string testing device of this utility model;
[0028] Figure 2 This is a schematic diagram of the testing device when it grabs a photovoltaic cell string for testing;
[0029] Figure 3 This is a side view structural schematic diagram of the photovoltaic cell string testing device of this utility model.
[0030] In the attached diagram: 100, photovoltaic cell string; 101, welding strip; 1, mounting bracket; 11, main frame; 12, intermediate connector; 121, slide groove; 2, telescopic gripping mechanism; 21, telescopic component; 22, suction cup component; 221, mounting plate; 222, suction cup body; 3, robotic arm assembly; 31, fixed arm; 32, moving arm; 33, drive motor; 4, electrode assembly; 41, upper electrode; 42, lower electrode; 5, sensor. Detailed Implementation
[0031] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.
[0032] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0033] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings. The dimensions of each component in the drawings are for illustrative purposes only and do not represent the dimensions in actual use.
[0034] Example 1
[0035] refer to Figures 1 to 3 This embodiment discloses a photovoltaic cell string testing device, wherein the photovoltaic cell string 100 has a solder strip 101 for power-on detection. When the solder strip 101 is in contact with the test electrode and conducts electricity, the photovoltaic cell string 100 can be subjected to EL testing.
[0036] The testing device in this embodiment includes a mounting bracket 1, which is connected to a telescopic gripping mechanism 2 for gripping the photovoltaic cell string 100. Both sides of the telescopic gripping mechanism 2 are provided with robotic arm assemblies 3 connected to the mounting bracket 1. The robotic arm assemblies 3 are connected to electrode assemblies 4. The robotic arm assemblies 3 are used to drive the electrode assemblies 4 to contact the solder strips 101 of the photovoltaic cell string 100 for testing.
[0037] in, Figure 1 and Figure 2 The diagram only schematically illustrates part of the structure of mounting bracket 1. Figure 3 The image shows the complete structure of mounting bracket 1 as seen from the side.
[0038] Specifically, mounting bracket 1 can be fixed to the bottom surface, or mounting bracket 1 can be fixedly connected to a stringer for welding photovoltaic cell strings 100. Mounting bracket 1 faces directly above the welded photovoltaic cell strings 100 to facilitate gripping and testing. Telescopic gripping mechanism 2 can grip the welded photovoltaic cell strings 100 and move vertically, thereby lifting and holding the photovoltaic cell strings 100 for testing. Robotic arm assembly 3 drives electrode assembly 4 to move, allowing electrode assembly 4 to approach or move away from the photovoltaic cell strings 100 for automatic continuity testing. Electrode assembly 4 can be connected to an external test circuit; when electrode assembly 4 contacts the solder strips 101 of the photovoltaic cell strings 100, EL testing is performed on the photovoltaic module.
[0039] In this embodiment, the photovoltaic cell string 100 is lifted from its original position by the telescopic gripping mechanism 2, and then the electrode assembly 3 brings the electrode assembly 4 into contact with the solder strip 101 of the photovoltaic cell string 100, thereby enabling testing of the photovoltaic cell string 100. After the test is completed, the photovoltaic cell string 100 is lowered back to its original position. Since there is no need to move the photovoltaic cell string 100 in the horizontal direction, the movement steps during the testing process can be reduced, thereby improving the testing efficiency.
[0040] refer to Figure 1 and Figure 2 In this embodiment, the robotic arm assembly 3 includes a fixed arm 31, a moving arm 32, and a drive motor 33. One end of the fixed arm 31 is connected to the mounting bracket 1, the fixed end of the drive motor 33 is connected to the other end of the fixed arm 31, and the output shaft of the drive motor 33 is connected to the moving arm 32.
[0041] Specifically, the fixed arm 31 can be vertically connected to the mounting bracket 1, with its lower end extending below the mounting bracket 1. The movable arm 32 is hinged to the lower end of the fixed arm 31, and the movable arm 32 can rotate to approach or move away from the welding strip 101 of the photovoltaic cell string 100. The drive motor 33 is used to drive the movable arm 32 to rotate relative to the fixed arm 31, providing power to the robotic arm assembly 3.
[0042] refer to Figure 2 The electrode assembly 4 includes an upper electrode 41 and a lower electrode 42. The upper electrode 41 is fixedly connected to the fixed arm 31 and located on the upper side of the solder strip 101 of the photovoltaic cell string 100. The lower electrode 42 is fixedly connected to the moving arm 32 and located on the lower side of the solder strip 101 of the photovoltaic cell string 100. (Reference) Figure 1In some embodiments, the upper electrode 41 may also be fixedly connected to the mounting bracket 1, which is equivalent to the upper electrode 41 being indirectly fixedly connected to the fixed arm 31 through the mounting bracket 1.
[0043] Figure 1 and Figure 2 The diagram shows two different mounting positions for the upper electrode 41; one of these positions can be selected for actual use. For example, Figure 1 The diagram shows the structure in which the upper electrode 41 is fixedly connected to the mounting bracket 1. Figure 2 The diagram shows a structure where the upper electrode 41 is directly fixedly connected to the fixed arm 31. Both the upper electrode 41 and the lower electrode 42 are electrically connected to an external test circuit, enabling EL testing of the photovoltaic cell string 100.
[0044] In this embodiment, the telescopic gripping mechanism 2 includes a telescopic component 21 and a suction cup component 22. The fixed end of the telescopic component 21 is fixedly connected to the mounting bracket 1, and the movable end of the telescopic component 21 is fixedly connected to the suction cup component 22. The telescopic component 21 can be an electric push rod, a telescopic cylinder, or a telescopic hydraulic cylinder. Specifically, in this embodiment, an electric push rod can be used as the telescopic component 21. The fixed end of the electric push rod is fixedly connected to the mounting bracket 1, and the movable end of the electric push rod is fixedly connected to the suction cup component 22. Therefore, the electric push rod can drive the suction cup component 22 to move up and down, thereby picking up the welded photovoltaic cell string 100 for EL testing.
[0045] refer to Figures 1 to 3 In this embodiment, the suction cup component 22 includes a mounting plate 221 and multiple suction cup bodies 222. The mounting plate 221 is fixedly connected to the moving end of the telescopic component 21, and each suction cup body 222 is fixedly connected to the mounting plate 221. Specifically, with Figure 1 Taking the direction shown as an example, the suction cup body 222 includes a suction cup end and a connecting end. The suction cup end of each suction cup body 222 faces downwards, towards the photovoltaic cell string 100, to facilitate downward movement and gripping of the photovoltaic cell string 100. The suction cup bodies 222 can be evenly distributed on the mounting plate 221, and multiple bodies can be used to improve the adsorption capacity of the photovoltaic cell string 100. The connecting end of the suction cup body 222 is fixedly connected to the mounting plate 221 and can be connected to an external air pump pipeline. This generates negative pressure, allowing the suction cup body 222 to effectively adhere to the photovoltaic cell string 100, and can also be blown downwards to separate the suction cup body 222 from the photovoltaic cell string 100.
[0046] Example 2
[0047] refer to Figure 3This embodiment is similar to Embodiment 1, except that in this embodiment, the robotic arm assembly 3 is slidably connected to the mounting frame, and the upper electrode 41 is fixedly connected to the fixed arm 31. Specifically, the mounting bracket 1 includes a main frame 11 and an intermediate connector 12. The upper end of the intermediate connector 12 is fixedly connected to the main frame 11, and the lower end of the intermediate connector 12 is fixedly connected to the fixed end of the telescopic component 21. The main frame 11 can be an aluminum alloy profile frame with an enclosing structure, and the side of the main frame 11 is open and connected to the intermediate connector 12. The intermediate connector 12 can be made of profile material, which extends along... Figure 1 The left and right sides are provided with sliding grooves 121, and the upper end of the fixed arm 31 is installed in the sliding grooves 121.
[0048] In some embodiments, a locking element (not shown) is also included, which is used to fix the fixed arm 31 to the slide groove 121. For example, the locking element is a bolt, with a threaded hole on the fixed arm 31, and the fixed arm 31 is tightened into the slide groove 121 of the intermediate connector 12 by the bolt. (See reference) Figure 3 The shape of the groove 121 can be a trapezoid with a large internal size and a small opening size. The shape of the upper side of the fixing arm 31 matches the groove 121. The end of the groove 121 is provided with an inlet, so the fixing arm 31 can be inserted into the groove 121 from the inlet at the end without coming out of the opening.
[0049] Example 3
[0050] refer to Figure 1 and Figure 2 This embodiment is similar to Embodiment 1, except that in this embodiment, the robotic arm assembly 3 is equipped with a sensor 5 for detecting the position of the photovoltaic cell string 100. The sensor 5 can be a photoelectric sensor 5, including a transmitter and a receiver. The transmitter and receiver are respectively fixedly mounted on the robotic arm assemblies 3 on both sides, or on the mounting bracket 1.
[0051] For example, in this embodiment, the transmitter and receiver are located on the fixed arms 31 on both sides, and are positioned on opposite sides of the two fixed arms 31. The height of the sensor 5 is consistent with the test position of the grasped photovoltaic cell string 100, enabling the sensor 5 to detect the grasped photovoltaic cell string 100. A controller is electrically connected to the sensor 5 and the robotic arm assembly 3. After the sensor 5 detects the grasped photovoltaic cell string 100, the controller can send a signal to cause the robotic arm assembly 3 to drive the electrode assembly 4 to test the photovoltaic cell string 100.
[0052] In some embodiments, the controller is selected as a microcontroller or a PLC controller. The telescopic gripping mechanism 2, the robotic arm assembly 3, and the sensor 5 are all electrically connected to the controller, which enables the coordinated operation of each component.
[0053] The technical features of the above embodiments can be combined arbitrarily without conflict to form more embodiments. The working process of the device in this solution is described below using at least one feasible embodiment as an example.
[0054] During the operation of the photovoltaic cell string testing device, the telescopic component 21 drives the suction cup component 22 to descend, picking up the welded photovoltaic cell string 100 through the suction cup component 22. Then, the telescopic component 21 drives the suction cup component 22 to rise. When the photovoltaic cell string 100 rises to a predetermined height, the upper side of the welding strip 101 of the photovoltaic cell string 100 contacts the upper electrode 41.
[0055] At this time, sensor 5 can detect the position of photovoltaic cell string 100 and further send a signal to make robotic arm assembly 3 move. The moving arm 32 of robotic arm assembly 3 rotates under the action of drive motor 33, so that the lower electrode 42 contacts the lower side of the welding strip 101 of photovoltaic cell string 100, and performs EL test by clamping and contacting the upper electrode 41 and the lower electrode 42 with the welding of photovoltaic cell string 100.
[0056] After the test is completed, the drive motor 33 drives the motion arm 32 to rotate, so that the motion arm 32 and the lower electrode 42 leave the photovoltaic cell string 100. Then, the telescopic component 21 drives the suction cup component 22 to descend, and put the photovoltaic cell string 100 back in its original position.
[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A photovoltaic cell string testing device, the photovoltaic cell string (100) having a solder tab (101) for energization detection, characterized by: The test device comprises a mounting bracket (1), a telescopic grabbing mechanism (2) for grabbing the photovoltaic cell string (100) is connected to the mounting bracket (1), mechanical arm assemblies (3) are arranged on both sides of the telescopic grabbing mechanism (2) and connected with the mounting bracket (1), electrode assemblies (4) are connected with the mechanical arm assemblies (3), and the mechanical arm assemblies (3) are used to drive the electrode assemblies (4) to contact the solder strips (101) of the photovoltaic cell string (100) for testing.
2. The photovoltaic cell string testing apparatus of claim 1, wherein: The mechanical arm assemblies (3) comprise fixed arms (31), moving arms (32) and driving motors (33), one end of the fixed arm (31) is connected with the mounting bracket (1), the other end of the fixed arm (31) is connected with the fixed end of the driving motor (33), the electrode assemblies (4) comprise upper electrodes (41) and lower electrodes (42), the upper electrode (41) is fixedly connected with the fixed arm (31) or the mounting bracket (1), and the lower electrode (42) is fixedly connected with the moving arm (32); the output shaft of the driving motor (33) is connected with the moving arm (32) to drive the moving arm (32) to drive the lower electrode (42) to rotate towards or away from the photovoltaic cell string (100).
3. The photovoltaic cell string testing apparatus of claim 2, wherein: The upper electrode (41) is fixedly connected with the fixed arm (31) and located on the upper side of the solder strips (101) of the photovoltaic cell string (100), and the lower electrode (42) is fixedly connected with the moving arm (32) and located on the lower side of the solder strips (101) of the photovoltaic cell string (100).
4. The photovoltaic cell string testing apparatus of claim 3, wherein: The telescopic grabbing mechanism (2) comprises telescopic components (21) and suction disc components (22), the fixed end of the telescopic component (21) is fixedly connected with the mounting bracket (1), and the moving end of the telescopic component (21) is fixedly connected with the suction disc component (22).
5. The photovoltaic cell string testing apparatus of claim 4, wherein: The suction disc component (22) comprises a mounting plate (221) and a plurality of suction disc bodies (222), the mounting plate (221) is fixedly connected with the moving end of the telescopic component (21), and each suction disc body (222) is fixedly connected with the mounting plate (221).
6. The photovoltaic cell string testing apparatus of claim 5, wherein: The telescopic component (21) is an electric push rod, a telescopic air cylinder or a telescopic hydraulic cylinder.
7. The photovoltaic cell string testing apparatus of claim 3, wherein: The mechanical arm assemblies (3) are slidably connected with the mounting bracket (1).
8. The photovoltaic cell string testing apparatus of claim 4, wherein: The mounting bracket (1) comprises a main frame (11) and an intermediate connecting piece (12), the upper end of the intermediate connecting piece (12) is fixedly connected with the main frame (11), and the lower end of the intermediate connecting piece (12) is fixedly connected with the fixed end of the telescopic component (21).
9. The photovoltaic cell string testing apparatus of claim 8, wherein: A sliding groove (121) is formed in the side edge of the intermediate connecting piece (12), the upper end of the fixed arm (31) is mounted in the sliding groove (121), and a locking piece is further arranged, and the locking piece is used for fixing the fixed arm (31) and the sliding groove (121).
10. The photovoltaic cell string testing apparatus of claim 1, wherein: A sensor (5) for detecting the position of the photovoltaic cell string (100) is arranged on the mechanical arm assemblies (3).