Device for detecting connection state of diode in junction box
The diode connection state detection device automates the detection of diode connections in photovoltaic components, improving accuracy and reducing labor and time requirements.
Patent Information
- Application Number
- CN202421288945.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-06-06
AI Technical Summary
In the production of existing photovoltaic modules, diode connection status detection relies on manual observation of photos, resulting in inaccurate detection and labor-consuming, affecting production efficiency.
Design a detection device including hydraulic cylinder, slide rail, mobile block, voltage conduction block, voltmeter and controller. The hydraulic drive voltage conduction block contacts the diode welding point, and uses the voltmeter to detect the voltage value to realize automatic detection of the diode connection state.
It realizes automatic detection of diode connection status, improves detection accuracy, saves human resources, shortens detection time, and improves photovoltaic module production efficiency.
Smart Images
Figure CN223108037U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaic module manufacturing, in particular to a detection device for the connection state of diodes in a junction box. Background Art
[0002] Currently, during the production process of photovoltaic modules, three junction boxes are fixed on the back of the photovoltaic module. The diodes inside the three junction boxes are connected through lead-out wires, so as to form a current path on the back of the photovoltaic module to conduct the current generated by the photovoltaic module. The welding work between the diodes of the junction box and the lead-out wires is usually completed by an automatic welding machine. After the welding work is completed, it is also necessary to detect the connection state of the diodes to confirm whether there is a phenomenon of poor welding at the welding joints between the two ends of the diodes and the lead-out wires, and whether the connection direction of the diodes is reversed, etc.
[0003] The existing method for detecting the connection state of diodes is to take pictures inside the junction box through a camera, and the staff observes the appearance of the diodes after welding according to the taken pictures to preliminarily determine the connection state of the diodes. However, to ensure the accuracy of detecting the connection state of diodes, it is often necessary to add manual positions to perform secondary detection on the diodes, which not only wastes human resources but also prolongs the detection time and affects the production efficiency of photovoltaic modules. Summary of the Utility Model
[0004] To solve the above technical problems, the utility model provides a detection device for the connection state of diodes in a junction box. The technical solution of the utility model is as follows:
[0005] A detection device for the connection state of diodes in a junction box includes a hydraulic cylinder, a slide rail, two moving blocks, a plurality of fasteners, two voltage conducting blocks, a voltmeter, a power supply and a controller. The cylinder body of the hydraulic cylinder is fixed on a photographing device, the piston rod of the hydraulic cylinder is connected to the middle of the slide rail. Both of the two moving blocks are slidably connected to the slide rail through the plurality of fasteners. The tops of the two voltage conducting blocks are respectively connected to the two moving blocks. The two voltage conducting blocks are respectively connected to the positive pole and the negative pole of the power supply. The voltmeter is connected in parallel with the power supply. The bottom end of the voltage conducting block connected to the positive pole of the power supply is used to abut against the welding joint between the positive pole of the diode and the lead-out wire in the junction box, and the bottom end of the voltage conducting block connected to the negative pole of the power supply is used to abut against the welding joint between the negative pole of the diode and the lead-out wire in the junction box. The hydraulic cylinder is electrically connected to the controller.
[0006] Optionally, a blind hole is opened at the bottom end of each of the two moving blocks, and the tops of the two voltage conducting blocks are respectively inserted into the blind holes of the two moving blocks. The size of the blind hole matches the size of the top end of the voltage conducting block.
[0007] Optionally, the shape of each of the voltage - conducting blocks is an inverted T - shape; a detection device for the connection state of diodes in a junction box further includes two shock - absorbing springs. The two shock - absorbing springs are respectively sleeved on the outer circumferences of the vertical parts of the two voltage - conducting blocks. The tops of the two shock - absorbing springs are respectively abutted against the two moving blocks, and the bottoms of the two shock - absorbing springs are respectively abutted against the upper surfaces of the horizontal parts of the two voltage - conducting blocks.
[0008] Optionally, the two voltage - conducting blocks are both made of copper.
[0009] All the above - mentioned optional technical solutions can be arbitrarily combined, and the present utility model does not elaborate on the structures after combination one by one.
[0010] By means of the above - mentioned solution, the beneficial effects of the present utility model are as follows:
[0011] By providing a slide rail, two moving blocks and two voltage - conducting blocks, the two moving blocks are both slidably connected to the slide rail, and the tops of the two voltage - conducting blocks are respectively connected to the two moving blocks, so that the distance between the two voltage - conducting blocks can be adjusted by the positions of the two moving blocks sliding on the slide rail, which is suitable for detecting the connection states of different types of diodes and the connection states of multiple interconnected diodes. By providing a voltmeter and a power supply, the two voltage - conducting blocks are respectively connected to the positive and negative poles of the power supply, and the voltmeter is connected in parallel with the power supply. When the bottoms of the two voltage - conducting blocks are abutted against the positive - pole welding point and the negative - pole welding point of the diode on the back of the photovoltaic module, a current path is formed. If the voltage value shown by the voltmeter is within the standard range, it can be determined that there is no soldering defect or reverse connection direction problem at the positive - pole welding point and the negative - pole welding point of the diode; if the voltage value shown by the voltmeter is greater than the value within the standard range, it can be determined that there is a soldering defect at the positive - pole welding point and the negative - pole welding point of the diode; if the voltage value shown by the voltmeter is 0, it can be determined that there is a problem with the reverse connection direction of the diode, and the staff can take out the photovoltaic module with problems. By providing a hydraulic cylinder and a controller, after the photographing device takes pictures of the diodes in the junction box, a signal is sent to the controller, and then the controller starts the hydraulic cylinder to extend the piston rod of the hydraulic cylinder, so that the bottoms of the two voltage - conducting blocks are in contact with the positive - pole welding point and the negative - pole welding point of the diode to conduct electricity, thereby detecting the connection state of the diode, and realizing the automatic operation of detecting the connection state of the diode. This not only eliminates the need for manual secondary detection, saves human resources, but also shortens the detection time and reduces the impact on the production efficiency of the photovoltaic module.
[0012] The above description is only an overview of the technical solution of the present utility model. In order to better understand the technical means of the present utility model and implement it according to the content of the specification, the following takes the preferred embodiments of the present utility model and coordinates with the attached drawings for detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic structural view of the present utility model;
[0014] Figure 2 is a circuit connection diagram of the present utility model.
[0015] Explanation of the reference numerals in the attached drawings:
[0016] 1. Hydraulic cylinder; 2. Slide rail; 3. Moving block; 4. Fastener; 5. Conductive voltage block; 6. Voltmeter; 7. Power supply; 8. Shock-absorbing spring; 9. Junction box; 10. Diode. Specific embodiments
[0017] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.
[0018] As Figure 1 and Figure 2 shown, a detection device for the connection state of a diode in a junction box provided by the present utility model includes a hydraulic cylinder 1, a slide rail 2, two moving blocks 3, a plurality of fasteners 4, two conductive voltage blocks 5, a voltmeter 6, a power supply 7 and a controller. The cylinder block of the hydraulic cylinder 1 is fixed on a photographing device. The piston rod of the hydraulic cylinder 1 is connected to the middle of the slide rail 2. Both of the two moving blocks 3 are slidably connected to the slide rail 2 through a plurality of the fasteners 4. The tops of the two conductive voltage blocks 5 are respectively connected to the two moving blocks 3. The two conductive voltage blocks 5 are respectively connected to the positive and negative poles of the power supply 7. The voltmeter 6 is connected in parallel with the power supply 7. The bottom end of the conductive voltage block 5 connected to the positive pole of the power supply 7 is used to abut against the welding place of the positive pole of the diode 10 and the lead wire in the junction box 9. The bottom end of the conductive voltage block 5 connected to the negative pole of the power supply 7 is used to abut against the welding place of the negative pole of the diode 10 and the lead wire in the junction box 9. The hydraulic cylinder 1 is electrically connected to the controller.
[0019] Specifically, the power supply 7 in the present utility model is a DC power supply; the fastener 4 in the present utility model is an internal hexagonal bolt.
[0020] In a specific embodiment, in the present utility model, three junction boxes 9 are connected to the back of the photovoltaic module. Therefore, there are three diodes 10 on the back of the photovoltaic module. Among them, the positive electrode of the first diode 10 is connected to the lead-out wire, serving as the positive electrode end of the three diodes 10. The negative electrode of the first diode 10 is connected to the positive electrode of the second diode 10 through a lead-out wire. The negative electrode of the second diode 10 is connected to the positive electrode of the third diode 10 through a lead-out wire. The negative electrode of the third junction box 9 is connected to the lead-out wire, serving as the negative electrode end of the three diodes 10. When detecting the connection state of the three diodes 10, two voltage-conducting blocks 5 can be respectively abutted against the positive electrode welding point of the first diode 10 and the negative electrode welding point of the third diode 10. By observing the voltage value shown on the voltmeter 6, the connection state of the three diodes 10 as a whole can be detected. If the voltage value shown on the voltmeter 6 is within the standard range, it proves that there is no problem with the connection state of the three diodes 10 as a whole. If the voltage value shown on the voltmeter 6 is greater than the value within the standard range, it proves that there is a problem of loose soldering in the connection state of the three diodes 10 as a whole. If the voltage value shown on the voltmeter 6 is 0, it proves that there is a problem of reverse connection of the three diodes 10. The staff will separately remove the photovoltaic modules that do not meet the welding standard and re-perform the welding treatment.
[0021] Furthermore, the present utility model can be applied to different fields for detecting the connection state of the diodes 10. If it is necessary to detect the connection state of multiple diodes 10 as a whole, one of the voltage-conducting blocks 5 can be abutted against the positive electrode welding point of the diode 10 serving as the positive electrode end of the multiple diodes 10 at the bottom end, and the other voltage-conducting block 5 can be abutted against the negative electrode welding point of the diode 10 serving as the negative electrode end of the multiple diodes 10 at the bottom end. Then, the connection state can be detected by observing the voltage value shown on the voltmeter 6. If the distance between the diode 10 serving as the positive electrode end of the multiple diodes 10 and the diode 10 serving as the negative electrode end of the multiple diodes 10 is relatively long, the staff can loosen multiple fasteners 4, move the two moving blocks 3 on the slide rail 2, and then tighten multiple fasteners 4 to adjust the distance between the two moving blocks 3, thereby adjusting the distance between the two voltage-conducting blocks 5, so that the two voltage-conducting blocks 5 can accurately contact the positive electrode welding point and the negative electrode welding point of the two diodes 10.
[0022] The two voltage-conducting blocks 5 in the present utility model can also detect the connection state of one diode 10. After the bottom ends of the two voltage-conducting blocks 5 are respectively abutted against the positive electrode welding point and the negative electrode welding point of the same diode 10, observe the voltage value shown on the voltmeter 6 to detect the connection state of one diode 10.
[0023] Furthermore, the controller in this utility model is also electrically connected to the photographing device. After the photographing device takes a picture of the diode 10 in the junction box 9, it sends a signal to the controller. The controller then activates the hydraulic cylinder 1, and the piston rod of the hydraulic cylinder 1 extends, driving the slide rail 2, the two moving blocks 3, and the two voltage-conducting blocks 5 downward, so that the bottoms of the two voltage-conducting blocks 5 are in contact with the positive and negative welding joints of the diode 10, thereby realizing the detection of the connection state of the diode 10.
[0024] In this utility model, the cylinder body of the hydraulic cylinder 1 is fixed on the photographing device, and the connection state of the diode 10 can be detected immediately after taking a picture, which can shorten the detection time to a certain extent. Of course, the cylinder body of the hydraulic cylinder 1 can also be fixed on other external mechanical equipment.
[0025] By slidingly connecting both of the two moving blocks 3 to the slide rail 2 and connecting the tops of the two voltage-conducting blocks 5 to the two moving blocks 3 respectively, the distance between the two voltage-conducting blocks 5 can be adjusted by the positions of the two moving blocks 3 sliding on the slide rail 2, which is suitable for detecting the connection states of different types of diodes 10 and the connection states of multiple interconnected diodes 10. By connecting the two voltage-conducting blocks 5 to the positive and negative poles of the power supply 7 respectively and connecting the voltmeter 6 in parallel with the power supply 7, when the bottoms of the two voltage-conducting blocks 5 are in contact with the positive and negative welding joints of the diode 10 on the back of the photovoltaic module, a current path is formed. Then, by observing the voltage value shown on the voltmeter 6, it can be determined whether there is a false soldering at the positive and negative welding joints of the diode 10 or whether there is a problem of reverse connection direction of the diode 10. Compared with the prior art that only observes the appearance of the diode 10 after welding, the detection device provided by this utility model can more intuitively and accurately judge the connection state of the diode 10 on the basis of observing the appearance of the welding joint of the diode 10, improving the accuracy of detection.
[0026] By electrically connecting the hydraulic cylinder 1 to the controller and controlling the descent of the hydraulic cylinder 1 by the controller, and then making the bottoms of the two voltage-conducting blocks 5 contact and conduct electricity with the positive and negative welding joints of the diode 10, the connection state of the diode 10 is detected, thereby realizing the automated operation of detecting the connection state of the diode 10. This not only eliminates the need for manual secondary detection, saving human resources, but also shortens the detection time and reduces the impact on the production efficiency of the photovoltaic module.
[0027] Optionally, a blind hole is provided at the bottom of each of the two moving blocks 3, and the tops of the two voltage-conducting blocks 5 are respectively inserted into the blind holes of the two moving blocks 3, and the size of the blind hole matches the size of the top of the voltage-conducting block 5.
[0028] By providing blind holes at the bottoms of the two moving blocks 3, the connection between the voltage-conducting block 5 and the moving block 3 is detachable, which facilitates the replacement of the voltage-conducting block 5.
[0029] The sizes of the two blind holes respectively match the sizes of the tops of the two voltage-conducting blocks 5, so that the tops of the voltage-conducting blocks 5 can be stably inserted into the blind holes, avoiding the situation of falling off.
[0030] Optionally, the shape of each of the voltage-conducting blocks 5 is an inverted T shape; a detection device for the connection state of diodes in a junction box further includes two shock-absorbing springs 8. The two shock-absorbing springs 8 are respectively sleeved on the outer circumferences of the vertical parts of the two voltage-conducting blocks 5. The tops of the two shock-absorbing springs 8 are respectively in contact with the two moving blocks 3, and the bottoms of the two shock-absorbing springs 8 are respectively in contact with the upper surfaces of the horizontal parts of the two voltage-conducting blocks 5.
[0031] Setting the voltage-conducting block 5 in an inverted T shape can increase the contact area between the bottom end of the voltage-conducting block 5 and the soldering part of the diode 10, avoiding the situation that the pressure concentration on the soldering part of the diode 10 caused by the voltage-conducting block 5 during descent damages the diode 10.
[0032] The top of the shock-absorbing spring 8 is in contact with the moving block 3, and the bottom of the shock-absorbing spring 8 is in contact with the upper surface of the horizontal part of the voltage-conducting block 5. When the voltage-conducting block 5 descends and is in contact with the soldering part of the diode 10, the shock-absorbing spring 8 buffers through its own elastic force to reduce the pressure exerted by the voltage-conducting block 5 on the soldering part of the diode 10; at the same time, the shock-absorbing spring 8 also has a shock-absorbing effect, reducing the pressure exerted by the voltage-conducting block 5 on the soldering part of the diode 10 through the shock-absorbing effect, protecting the diode 10 from being damaged.
[0033] Optionally, the materials of the two voltage-conducting blocks 5 are both copper.
[0034] Specifically, the voltage-conducting block 5 made of copper has good electrical conductivity, can form a good current path, and ensures the accuracy of the voltage value detected by the voltmeter 6.
[0035] In summary, the present utility model connects the two voltage-conducting blocks 5, the power supply 7 and the voltmeter 6. By observing the voltage value shown on the voltmeter 6, the connection state of the diode 10 can be judged more intuitively and accurately, improving the accuracy of detection; by setting the controller and the hydraulic cylinder 1, the automatic operation of detecting the connection state of the diode 10 by the two voltage-conducting blocks 5 is realized, saving human resources and improving the detection efficiency.
[0036] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.
Claims
1. A detection device for the connection state of a diode in a junction box, characterized in that Including: A hydraulic cylinder (1), a slide rail (2), two moving blocks (3), a plurality of fasteners (4), two conductive voltage blocks (5), a voltmeter (6), a power supply (7) and a controller. The cylinder block of the hydraulic cylinder (1) is fixed on the photographing device. The piston rod of the hydraulic cylinder (1) is connected to the middle of the slide rail (2). Both of the two moving blocks (3) are slidably connected to the slide rail (2) through the plurality of fasteners (4). The tops of the two conductive voltage blocks (5) are respectively connected to the two moving blocks (3). The two conductive voltage blocks (5) are respectively connected to the positive and negative poles of the power supply (7). The voltmeter (6) is connected in parallel with the power supply (7). The bottom end of the conductive voltage block (5) connected to the positive pole of the power supply (7) is used to abut against the welding point of the positive pole of the diode (10) and the lead wire in the junction box (9). The bottom end of the conductive voltage block (5) connected to the negative pole of the power supply (7) is used to abut against the welding point of the negative pole of the diode (10) and the lead wire in the junction box (9); The hydraulic cylinder (1) is electrically connected to the controller.
2. The detection device for the connection state of diodes in a junction box according to claim 1, wherein A blind hole is provided at the bottom end of each of the two moving blocks (3). The tops of the two conductive voltage blocks (5) are respectively inserted into the blind holes of the two moving blocks (3). The size of the blind hole matches the size of the top end of the conductive voltage block (5).
3. The detecting device for the connection state of a diode in a junction box according to claim 1 or 2, characterized in that, The shape of each conductive voltage block (5) is an inverted T shape; It further includes: two shock-absorbing springs (8). The two shock-absorbing springs (8) are respectively sleeved on the outer circumferences of the vertical parts of the two conductive voltage blocks (5). The tops of the two shock-absorbing springs (8) respectively abut against the two moving blocks (3). The bottoms of the two shock-absorbing springs (8) respectively abut against the upper surfaces of the horizontal parts of the two conductive voltage blocks (5).
4. The detection device for the connection state of diodes in a junction box according to claim 1, characterized in that, The materials of the two conductive voltage blocks (5) are both copper.