A photovoltaic module dark current testing device

Abstract

The application discloses a kind of photovoltaic module dark current testing device, it is related to dark current detection device technical field, the detection device includes workbench, workbench is placed with cabinet, multiple drawers are slidably installed on cabinet, multiple current detection modules are evenly installed in drawer, workbench is installed with host computer, host computer is electrically connected with current detection module, temperature and humidity control assembly is provided on the cabinet, temperature and humidity control assembly adjusts the temperature and humidity inside cabinet, when drawer is completely pushed into cabinet, darkroom for accommodating photovoltaic module is formed, meet the lightless environment requirement of photovoltaic module dark current test, improve detection precision, host computer as the overall control unit of device forms the closed-loop control of "instruction issue-data acquisition-result feedback", display screen connected with host computer real-time display test state, real-time parameter and test result, replace artificial reading judgment, reduce error.

Description

Technical Field

[0001] This invention relates to the field of dark current detection device technology, specifically a dark current testing device for photovoltaic modules. Background Technology

[0002] Dark current refers to the current flowing through a photovoltaic cell when a specified reverse voltage is applied across its terminals in the absence of light. It is one of the important indicators for evaluating the photoelectric performance of photovoltaic products, and its test results are directly related to the subsequent judgment of defects and performance stability of photovoltaic devices.

[0003] Currently, dark current testing in the industry mostly focuses on photovoltaic cells, and a relatively mature testing standard, JB / T 9478-2013 "Measurement Methods for Photovoltaic Cells," has been established. However, dark current testing for photovoltaic modules is less common, and there is a lack of specialized testing equipment adapted for modules. Since the encapsulation process may introduce some hidden defects, dark current testing of photovoltaic modules is essential. In the prior art known to the inventor, dark current testing of photovoltaic modules is generally performed manually. A measurement circuit is constructed using a power module, photovoltaic module, and a high-precision digital multimeter. The photovoltaic module is shaded before measurement. However, manual testing suffers from low efficiency, difficult wiring, and challenges in shading, and the data is recorded manually, making traceability difficult.

[0004] While existing patent CN201110285623.4 attempts to optimize dark current testing equipment, its design cannot meet the requirements of component testing. The "box body + box cover" dark box structure proposed in this patent, although it can improve light-blocking issues through fastening, still has shortcomings:

[0005] (1) Insufficient light-shielding stability: The fastening structure is prone to sealing failure due to assembly gaps or long-term wear, which poses a risk of light leakage and affects the accuracy of test data;

[0006] (2) Limited compatibility: It is suitable for small-sized solar cells, and the test probe is only designed for the positive and negative electrodes of the cell, and cannot be adapted to photovoltaic modules with larger size and more complex electrode structure;

[0007] (3) Operation and data issues: Manually connecting the probe and electrode can easily lead to incorrect polarity, and manual reading of instrument values ​​is required to determine whether the dark resistance is qualified, resulting in large reading errors and low testing efficiency. Summary of the Invention

[0008] The purpose of this invention is to provide a dark current testing device for photovoltaic modules to solve the problems raised in the prior art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: The testing device includes a workbench, on which a cabinet is placed, and multiple drawers are slidably installed on the cabinet. Multiple current detection modules are evenly installed in the multiple drawers. A host computer is installed on the workbench, and the host computer is electrically connected to the multiple current detection modules. A temperature and humidity control group is provided on the cabinet, and the temperature and humidity control group regulates the temperature and humidity inside the cabinet.

[0010] As a preferred technical solution, the current detection module includes a test socket and a power supply component, wherein the power supply component is electrically connected to the host computer.

[0011] The drawer is evenly equipped with several test sockets. A result display light is installed on one side of each test socket. The result display light is electrically connected to the host computer. A groove is provided on one side of each test socket, and a protrusion is provided on the side of the workpiece plug. The shapes of the groove and the protrusion match.

[0012] As a preferred technical solution, the cabinet body is provided with an equal number of start / stop buttons as the number of drawers. Each start / stop button is electrically connected to a corresponding drawer, and the start / stop button is electrically connected to a host computer.

[0013] As a preferred technical solution, a limit switch is installed inside the cabinet, and a buzzer is installed on the outside of the cabinet. The limit switch is electrically connected to the start / stop button and the buzzer.

[0014] As a preferred technical solution, a wire harness is provided below each of the test sockets, and the wire harness is used to organize the wires connected to the test sockets.

[0015] A buffer layer is provided on the inner surface of the cabinet.

[0016] As a preferred technical solution, the temperature and humidity control component includes a mounting box, an air pump, a water pump, an air outlet, an air inlet, a control chamber, a diverter pipe, a drying plate, a heating plate, a cooling plate, a humidification chamber, a water inlet, a water inlet ring, a gear ring, an adjustment plate, an adjustment motor, a drive gear, a temperature detector, a humidity detector, and an atomizing nozzle.

[0017] The installation box is installed on the workbench, and the air pump is installed inside the installation box. The air outlet is opened on the cabinet. The input end of the air pump is connected to the air outlet, and the output end of the air pump is connected to the control chamber. The other end of the control chamber is provided with the air inlet. The air inlet is equipped with the diverter pipe, which extends into the cabinet. The drying plate, the heating plate, and the cooling plate are installed sequentially from the air pump to the diverter pipe inside the control chamber.

[0018] The heating plate has a humidification chamber inside, and the humidification chamber has a water inlet hole around its circumference. The control chamber is fitted with a water inlet ring on its outer side, and the control chamber has a connecting hole that connects the water inlet ring and the water inlet hole. The atomizing nozzle is installed on the water inlet hole, and the water pump is installed in the mounting box. The output end of the water pump is connected to the water inlet ring.

[0019] The installation box contains the regulating motor, the output shaft of the regulating motor is equipped with the drive gear, the regulating cavity contains two gear rings located on both sides of the drying plate, and the regulating plate is mounted on the gear rings;

[0020] The cabinet is equipped with the temperature detector and the humidity detector, and the air pump, the water pump, the heating plate, the cooling plate and the regulating motor are all electrically connected to the host computer.

[0021] As a preferred technical solution, the temperature and humidity control component further includes an exhaust port, a dehumidification valve, a drying port, an electric telescopic rod, a baffle plate, and a return plate;

[0022] The drying plate has an exhaust hole inside, and the exhaust valve is installed at the outlet end of the exhaust hole. The exhaust valve is electrically connected to the upper motor. The adjusting plate near the heating plate has a drying port, and the electric telescopic rod is installed on the adjusting plate. The baffle plate is installed at the end of the electric telescopic rod. The return plate is installed between the heating plate and the cooling plate.

[0023] As a preferred technical solution, a barcode scanner is installed on the cabinet, and the barcode scanner is electrically connected to the host computer.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. The test cabinet structure of "cabinet + pull-out drawer" is adopted. The drawer is embedded in the cabinet through the slide rail. When fully pushed in, it forms a gapless dark chamber with the cabinet, which replaces the existing snap-fit ​​dark box. The structure eliminates light leakage caused by assembly gaps and wear, and meets the requirements of the dark current test of photovoltaic modules in the absence of light.

[0026] 2. The host computer and the measurement circuit realize signal interaction. The dedicated test program automatically completes parameter preset, comparison of the measured value of dark current with the upper limit, data recording, and real-time output of results on the display screen, replacing manual circuit construction, reading and judgment, and solving the problems of low efficiency and large error of manual testing.

[0027] 3. Design a "groove + convex strip" male and female mating anti-reverse insertion structure for photovoltaic module connectors (the test socket has a groove and the workpiece plug has a convex strip), which only allows positive insertion and blocks reverse insertion to avoid manual connection of the negative and positive terminals.

[0028] 4. Set up temperature and humidity control components to ensure that the temperature and humidity inside the cabinet are at the optimal detection state, ensuring the accuracy of the detection results. At the same time, suitable temperature and humidity can reduce the wear and tear of internal electrical components and extend the service life of the equipment. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the first partial structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the first partial cross-sectional structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the overall assembly cross-section of the present invention;

[0033] Figure 5 This is a cross-sectional structural diagram of the temperature and humidity control component of the present invention;

[0034] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A;

[0035] Figure 7 For the present invention Figure 5 Enlarged structural diagram at point B;

[0036] Figure 8 This is a schematic diagram of the second partial cross-sectional structure of the present invention;

[0037] Figure 9 This is a schematic diagram of the second partial structure of the present invention;

[0038] Figure 10 This is a schematic diagram of the equivalent circuit of the detection device of the present invention.

[0039] In the diagram: 1. Workbench; 2. Cabinet; 3. Drawer; 4. Current detection module; 401. Test socket; 402. Recess; 5. Host computer; 6. Start / Reset button; 7. Limit switch; 8. Buzzer; 9. Cable harness; 10. Buffer layer; 11. Temperature and humidity control components; 1101. Mounting box; 1102. Air pump; 1103. Water pump; 1104. Air outlet; 1105. Air inlet; 1106. Control chamber; 1107. Diverter pipe; 1108. Drying plate; 1109. Heating plate; 111 0. Cooling plate; 1111. Humidification chamber; 1112. Water inlet; 1113. Water inlet ring; 1114. Gear ring; 1115. Adjusting plate; 1116. Adjusting motor; 1117. Drive gear; 1118. Exhaust port; 1119. Exhaust valve; 1120. Drying port; 1121. Electric telescopic rod; 1122. Baffle plate; 1123. Return plate; 1124. Temperature detector; 1125. Humidity detector; 1126. Atomizing nozzle; 12. Barcode scanner; 13. Result display light. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0041] Example: Figures 1-4 and Figure 10 As shown, the present invention provides a technical solution for a photovoltaic module dark current testing device. The testing device includes a workbench 1, a cabinet 2 placed on the workbench 1, multiple drawers 3 slidably installed on the cabinet 2, multiple current detection modules 4 evenly installed in the drawers 3, a host computer 5 installed on the workbench 1, and the host computer 5 electrically connected to the current detection modules 4. A temperature and humidity control component 11 is provided on the cabinet 2, and the temperature and humidity control component 11 regulates the temperature and humidity inside the cabinet 2.

[0042] Before performing dark current testing, the photovoltaic module is placed in drawer 3, and then drawer 3 is pushed into cabinet 2. When drawer 3 is fully pushed into cabinet 2, it together forms a dark chamber to accommodate the photovoltaic module. Drawer 3 is embedded in cabinet 2 by a slide rail. When fully pushed in, it encloses cabinet 2 to form a gapless dark chamber, replacing the existing snap-fit ​​dark box. This structurally eliminates light leakage caused by assembly gaps and wear, meets the requirements of the dark current test of photovoltaic modules in a light-free environment, and improves the testing accuracy.

[0043] The host computer 5 communicates with the current detection module 4. The host computer 5 controls the current detection module 4 to output the detection voltage and collect dark current data. Then, the measured value of dark current is compared with the preset threshold to output the test result.

[0044] The host computer 5, as the overall control unit of the device, interacts with the current detection module 4 through the communication interface, executes the logic instructions of the dedicated test program, presets the output reverse voltage and dark current upper limit parameters, automatically compares the measured value of dark current with the preset upper limit, and records the test time and current data, forming a closed-loop control of "instruction issuance - data acquisition - result feedback". The display screen connected to the host computer 5 displays the test status, real-time parameters and test results in real time, replacing manual reading and judgment and reducing errors.

[0045] like Figures 2-3 and Figure 9 As shown, the current detection module 4 includes a test socket 401 and a power supply unit, which is electrically connected to the host computer 5.

[0046] A number of test sockets 401 are evenly installed inside the drawer 3. A result display light 13 is installed on one side of the test socket 401. The result display light 13 is electrically connected to the host computer 5. A groove 402 is provided on one side of the test socket 401, and a protrusion is provided on the side of the workpiece plug. The groove 402 and the protrusion are matched in shape.

[0047] The groove 402 and the convex strip form an anti-reverse insertion structure. During testing, the host computer 5 controls the power supply to provide reverse voltage to the test socket 401 for testing. When the workpiece plug is inserted into the test socket 401, the plug can be normally inserted into the test socket 401 only when the convex strip is embedded along the groove 402. When plugged in the reverse direction, the convex strip is blocked by the edge of the groove 402 and cannot be connected. The anti-reverse insertion structure can prevent the operator from connecting the negative and reverse terminals, which may cause equipment damage.

[0048] For products that pass the inspection, the host computer 5 will control the corresponding result display light 13 to light up, indicating that the product has passed the inspection, making it convenient for staff to classify and pick it up.

[0049] The cabinet 2 has an equal number of start / stop buttons 6 as drawers 3 on its outer side. Each start / stop button 6 is electrically connected to the corresponding drawer 3 and is electrically connected to the host computer 5.

[0050] The power supply of each drawer 3 is controlled by a master switch, namely the start / reset button 6. Each drawer is independently controlled by the start / reset button 6 controlled by the host computer 5. When a fault such as poor contact or abnormal temperature occurs in a certain drawer, the start item controlled by the host computer 5 to the start / reset button 6 will not work. Only the drawer will stop running, while other drawers can be tested normally. The start / reset button 6 is used to start the test process after the drawer 3 is pushed in and to reset the equipment data after the test is completed.

[0051] In the event of a failure in a single layer, the normal use of other layers will not be affected, which can effectively reduce the impact of downtime on testing efficiency.

[0052] A limit switch 7 is installed inside the cabinet 2, and a buzzer 8 is installed on the outside of the cabinet 2. The limit switch 7 is electrically connected to the start / stop button 6 and the buzzer 8.

[0053] Limit switch 7 is installed inside drawer 3. Limit switch 7 will trigger a conduction signal only when drawer 3 is fully pushed in, that is, when the dark chamber is sealed in place, and the start item of start / stop button 6 will be effective. If drawer 3 is not closed tightly, the start item of start / stop button 6 will be in a disabled state, and the buzzer 8 equipped with the test cabinet will emit a "beep" prompt sound to remind the operator to adjust the position of drawer 3.

[0054] Each test socket 401 is provided with a cable tie 9 below it, which organizes the cable bundles connected to the test socket 401.

[0055] A buffer layer 10 is provided on the inner surface of cabinet 2.

[0056] The cable tie 9 is used to organize the wires of the photovoltaic module connector to prevent the wires from scraping against the upper cabinet 2 during the pushing and pulling of the drawer 3, which would cause the drawer 3 to be difficult to push and pull and reduce the testing efficiency.

[0057] The buffer layer 10 is made of EVA foam and has a grid-like anti-slip texture pressed on its surface to prevent scratches on the photovoltaic module encapsulation surface and to prevent the module from moving or colliding during the pushing and pulling of drawer 3.

[0058] like Figure 1 and Figures 4-8 As shown, the temperature and humidity control assembly 11 includes a mounting box 1101, an air pump 1102, a water pump 1103, an air outlet 1104, an air inlet 1105, a control chamber 1106, a diverter pipe 1107, a drying plate 1108, a heating plate 1109, a cooling plate 1110, a humidification chamber 1111, a water inlet 1112, a water inlet ring 1113, a gear ring 1114, an adjustment plate 1115, an adjustment motor 1116, a drive gear 1117, a temperature detector 1124, a humidity detector 1125, and an atomizing nozzle 1126.

[0059] An installation box 1101 is installed on the workbench 1. An air pump 1102 is installed inside the installation box 1101. An air outlet 1104 is opened on the cabinet 2. The input end of the air pump 1102 is connected to the air outlet 1104. The output end of the air pump 1102 is connected to a control chamber 1106. An air inlet 1105 is provided at the other end of the control chamber 1106. A diverter pipe 1107 is installed in the air inlet 1105. The diverter pipe 1107 extends into the cabinet 2. A drying plate 1108, a heating plate 1109, and a cooling plate 1110 are installed in the control chamber 1106 in sequence from the air pump 1102 to the diverter pipe 1107.

[0060] The heating plate 1109 has a humidification chamber 1111 inside, and a water inlet hole 1112 is opened around the humidification chamber 1111. A water inlet ring 1113 is sleeved on the outside of the control chamber 1106. A connection hole is opened on the control chamber 1106, which connects the water inlet ring 1113 and the water inlet hole 1112. An atomizing nozzle 1126 is installed on the water inlet hole 1112. A water pump 1103 is installed in the mounting box 1101, and the output end of the water pump 1103 is connected to the water inlet ring 1113.

[0061] An adjusting motor 1116 is installed inside the mounting box 1101. A drive gear 1117 is installed on the output shaft of the adjusting motor 1116. Two gear rings 1114 are installed inside the regulating chamber 1106. The two gear rings 1114 are located on both sides of the drying plate 1108. An adjusting plate 1115 is installed on the gear rings 1114.

[0062] The cabinet 2 is equipped with a temperature detector 1124 and a humidity detector 1125. The air pump 1102, water pump 1103, heating plate 1109, cooling plate 1110 and regulating motor 1116 are all electrically connected to the host computer 5.

[0063] Temperature exponentially increases the thermal motion of molecules inside the PN junction, leading to a significant increase in dark current detection results, which in turn affects the detection results. High humidity can cause surface leakage current, and an overly dry detection environment can generate static electricity that affects the detection results. Therefore, the detection environment should maintain appropriate humidity and temperature to ensure the accuracy of the detection results and the safety of the detection.

[0064] After the drawer 3 containing the photovoltaic modules is pushed into the cabinet 2, the display screen of the host computer 5 will show that it can be tested. Before testing, the temperature and humidity data transmitted back to the host computer 5 by the temperature detector 1124 and humidity detector 1125 are observed, and the temperature and humidity of the environment inside the cabinet 2 are adjusted. When adjusting, the air pump 1102 must be started first. The air pump 1102 pumps the gas in the cabinet into the control chamber 1106 for processing. The processed gas re-enters the cabinet through the diversion pipe 1107 to complete the adjustment.

[0065] When the humidity inside the cabinet is too high, the air pump 1102 pumps gas through the drying plate 1108, and the drying plate 1108 adsorbs the moisture in the gas, making the gas dry before entering the cabinet and reducing the humidity inside the cabinet.

[0066] When the temperature inside the cabinet is too high, the host computer 5 sends a command to start the cooling plate 1110. When the gas delivered by the air pump 1102 carries heat, the gas temperature decreases when it passes through the cooling plate 1110, and the low-temperature gas enters the cabinet, thereby reducing the temperature inside the cabinet.

[0067] When the temperature inside the cabinet is too low, the host computer 5 sends a command to start the heating plate 1109. When the gas inside the cabinet flows through the heating plate 1109, it carries heat and re-enters the cabinet to raise the temperature inside the cabinet.

[0068] When the humidity inside the cabinet is too low, the host computer 5 starts the water pump 1103. The water pump 1103 pumps water from the outside, which flows through the water inlet ring 1113 and along the water inlet hole 1112 to the atomizing nozzle 1126. Water mist is sprayed out from various angles of the humidification chamber 1111. The water mist will form a curtain. When the gas passes through the water curtain, it will carry a certain amount of moisture. When the gas enters the cabinet, it will increase the humidity inside the cabinet.

[0069] The host computer 5 will adjust the heating plate 1109, cooling plate 1110, and water pump 1103 according to the temperature and humidity requirements inside the cabinet. When the temperature and humidity are high, the gas will be dried by the drying plate 1108 and cooled by the cooling plate 1110. When the temperature and humidity are low, the gas will be dried by the drying plate 1108 and heated by the heating plate 1109. When the temperature and humidity are low, the gas can be heated and humidified at the same time by passing through the heating plate 1109. At the same time, the water mist absorbs heat, which is more conducive to increasing the humidity of the gas.

[0070] When the gas is being humidified, the drying plate 1108 is not needed to dry the gas. At this time, the host computer 5 will control the adjustment motor 1116 to start. The output shaft of the adjustment motor 1116 drives the drive gear 1117 to rotate. The drive gear 1117 drives the adjustment plate 1115 to rotate through the gear ring 1114. The adjustment plate 1115 blocks the drying plate 1108, and the gas will pass over the drying plate 1108 to prevent the drying plate 1108 from reducing the gas humidity and to ensure the efficiency of humidity control.

[0071] The movement of gas is irregular and can fill every part of the cabinet. By circulating the gas, the temperature and humidity inside the cabinet can be regulated to make the temperature and humidity more uniform, which is beneficial to the accuracy of the test results.

[0072] The temperature and humidity control assembly 11 also includes an exhaust port 1118, a dehumidification valve 1119, a drying port 1120, an electric telescopic rod 1121, a baffle plate 1122, and a return plate 1123;

[0073] The drying plate 1108 has an exhaust port 1118 inside, and a dehumidification valve 1119 is installed at the outlet end of the exhaust port 1118. The dehumidification valve 1119 is electrically connected to the host computer 5. The adjusting plate 1115 near the heating plate 1109 has a drying port 1120, and an electric telescopic rod 1121 is installed on the adjusting plate 1115. A baffle plate 1122 is installed at the end of the electric telescopic rod 1121. A return plate 1123 is installed between the heating plate 1109 and the cooling plate 1110.

[0074] An air inlet valve is installed on the diverter pipe 1107 and is electrically connected to the host computer 5. The air inlet valve is normally open. When the gas needs to be dried, and the drying process is completed (i.e., after the temperature and humidity control is finished), the air inlet valve at the diverter pipe 1107 is closed. The air pump 1102 and the heating plate 1109 are started, and the exhaust valve 1119 is opened. At the same time, the electric telescopic rod 1121 is controlled to retract, opening the drying port 1120. At this time, the gas pumped in by the air pump 1102 will be heated by the heating plate 1109. Under the obstruction of the baffle plate 1122, it will accelerate towards the drying port 1120. The hot gas enters the drying plate 1108 and is discharged from the exhaust port 1118. When the hot gas passes through the drying plate 1108, it will carry away the moisture on the drying plate 1108, completing the regeneration of the drying plate 1108 and preparing for the next dehumidification. If dehumidification is not performed, the corresponding regeneration cycle of the drying plate 1108 will not be triggered.

[0075] A barcode scanner 12 is installed on the cabinet 2, and the barcode scanner 12 is electrically connected to the host computer 5.

[0076] The barcode scanner 12 is connected to the host computer 5. Before testing, the barcode scanner 12 scans the barcode information of the photovoltaic module. The host computer 5 automatically associates the module information obtained by scanning with the test data of the module and stores it in the host database. The host computer 5 automatically associates the barcode obtained by scanning with the test data of the module, such as voltage, dark current and test temperature, to generate a "unique traceability file of the module" and stores it in the database of the host computer 5, thus meeting the quality traceability requirements in the production process.

[0077] Working principle of the invention:

[0078] The host computer 5, as the overall control unit of the device, interacts with the current detection module 4 through the communication interface, executes the logic instructions of the dedicated test program, presets the output reverse voltage and dark current upper limit parameters, automatically compares the measured value of dark current with the preset upper limit, and records the test time and current data, forming a closed-loop control of "instruction issuance - data acquisition - result feedback". The display screen connected to the host computer 5 displays the test status, real-time parameters and test results in real time, replacing manual reading and judgment and reducing errors.

[0079] Each drawer 3 is equipped with an individual start / reset button 6, which controls the start and reset of the detection of a single layer. Precise control is achieved through the host computer 5. In the event of a failure in a single layer, the normal use of other layers will not be affected, which can effectively reduce the impact of downtime on detection efficiency.

[0080] Before the test, the host computer 5 adjusts the temperature and humidity inside the cabinet based on the data transmitted back by the temperature detector 1124 and the humidity detector 1125 to ensure that the temperature and humidity inside the cabinet are in the optimal testing state, ensuring the accuracy of the test results. At the same time, suitable temperature and humidity can reduce the wear and tear on internal electrical components and extend the service life of the equipment.

[0081] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A photovoltaic module dark current testing device, characterized in that: The testing device includes a workbench (1), on which a cabinet (2) is placed. Multiple drawers (3) are slidably installed on the cabinet (2). Multiple current detection modules (4) are evenly installed in the multiple drawers (3). A host computer (5) is installed on the workbench (1). The host computer (5) is electrically connected to the multiple current detection modules (4). A temperature and humidity control component (11) is provided on the cabinet (2). The temperature and humidity control component (11) regulates the temperature and humidity inside the cabinet (2). The temperature and humidity control assembly (11) includes a mounting box (1101), an air pump (1102), a water pump (1103), an air outlet (1104), an air inlet (1105), a control chamber (1106), a diverter pipe (1107), a drying plate (1108), a heating plate (1109), a cooling plate (1110), a humidification chamber (1111), a water inlet (1112), a water inlet ring (1113), a gear ring (1114), an adjustment plate (1115), an adjustment motor (1116), a drive gear (1117), a temperature detector (1124), a humidity detector (1125), and an atomizing nozzle (1126). The workbench (1) is equipped with the mounting box (1101), the mounting box (1101) is equipped with the air pump (1102), the cabinet (2) is provided with the air outlet (1104), the input end of the air pump (1102) is connected to the air outlet (1104), the output end of the air pump (1102) is connected to the control chamber (1106), the other end of the control chamber (1106) is provided with the air inlet (1105), the air inlet (1105) is equipped with the diverter pipe (1107), the diverter pipe (1107) extends into the cabinet (2), and the control chamber (1106) is equipped with the drying plate (1108), the heating plate (1109) and the cooling plate (1110) in sequence from the air pump (1102) to the diverter pipe (1107). The heating plate (1109) is provided with a humidification chamber (1111) inside. The humidification chamber (1111) has a water inlet hole (1112) around its circumference. The control chamber (1106) is fitted with a water inlet ring (1113) on its outer side. The control chamber (1106) has a connecting hole that connects the water inlet ring (1113) and the water inlet hole (1112). The atomizing nozzle (1126) is installed on the water inlet hole (1112). The water pump (1103) is installed in the mounting box (1101). The output end of the water pump (1103) is connected to the water inlet ring (1113). The regulating motor (1116) is installed inside the mounting box (1101). The driving gear (1117) is installed on the output shaft of the regulating motor (1116). Two gear rings (1114) are installed inside the regulating cavity (1106). The two gear rings (1114) are located on both sides of the drying plate (1108). The regulating plate (1115) is installed on the gear rings (1114). The cabinet (2) is equipped with the temperature detector (1124) and the humidity detector (1125). The air pump (1102), the water pump (1103), the heating plate (1109), the cooling plate (1110) and the regulating motor (1116) are all electrically connected to the host computer (5).

2. The photovoltaic module dark current testing device according to claim 1, characterized in that: The current detection module (4) includes a test socket (401) and a power supply, which is electrically connected to the host computer (5). Several test sockets (401) are evenly installed inside the drawer (3). A result display light (13) is installed on one side of the test socket (401). The result display light (13) is electrically connected to the host computer (5). A groove (402) is provided on one side of the test socket (401), and a protrusion is provided on one side of the workpiece plug. The groove (402) and the protrusion are matched in shape.

3. The photovoltaic module dark current testing device according to claim 1, characterized in that: The cabinet (2) is provided with an equal number of start / stop buttons (6) on the outside, which are the same as the number of drawers (3). Each start / stop button (6) is electrically connected to the corresponding drawer (3), and the start / stop button (6) is electrically connected to the host computer (5).

4. The photovoltaic module dark current testing device according to claim 3, characterized in that: A limit switch (7) is installed inside the cabinet (2), and a buzzer (8) is installed on the outside of the cabinet (2). The limit switch (7) is electrically connected to the start / stop button (6) and the buzzer (8).

5. A photovoltaic module dark current testing device according to claim 2, characterized in that: Each of the test sockets (401) is provided with a cable tie (9) below it, which is used to organize the cable bundles connected to the test sockets (401); The inner surface of the cabinet (2) is provided with a buffer layer (10).

6. The photovoltaic module dark current testing device according to claim 1, characterized in that: The temperature and humidity control assembly (11) also includes an exhaust port (1118), a dehumidification valve (1119), a drying port (1120), an electric telescopic rod (1121), a baffle plate (1122), and a return plate (1123). The drying plate (1108) has an exhaust hole (1118) inside. The exhaust valve (1119) is installed at the outlet end of the exhaust hole (1118). The exhaust valve (1119) is electrically connected to the host computer (5). The adjusting plate (1115) near the heating plate (1109) has a drying port (1120). The electric telescopic rod (1121) is installed on the adjusting plate (1115). The baffle plate (1122) is installed at the end of the electric telescopic rod (1121). The return plate (1123) is installed between the heating plate (1109) and the cooling plate (1110).

7. The photovoltaic module dark current testing device according to claim 1, characterized in that: A barcode scanner (12) is installed on the cabinet (2), and the barcode scanner (12) is electrically connected to the host computer (5).

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