A photovoltaic module wet leakage insulation testing device

Abstract

The utility model relates to photovoltaic module production equipment technical field especially relates to a kind of photovoltaic module wet leakage insulation testing device, including test water tank, drain groove, water pump and temperature control device, the test water tank and the drain groove are connected with the water pump respectively by pipeline, the water pump is connected with the temperature control device by pipeline, the temperature control device is connected with the test water tank by pipeline, the water pump is used to pump the water in test water tank and drain groove into the temperature control device;The drain groove is located in the side portion of the test water tank, the test water tank is horizontally arranged, the drain groove is obliquely arranged, the included angle between the drain groove and horizontal plane is 10 °~30 °. The drain groove is obliquely arranged, so that the photovoltaic module is completely drained after testing, and the test environment is kept clean.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module production equipment technology, and in particular to a photovoltaic module wet leakage current insulation testing device. Background Technology

[0002] Photovoltaic modules are the core and most important component of a solar power generation system. A photovoltaic module mainly comprises nine core components: photovoltaic panels, interconnecting strips, busbars, glass, EVA, backsheet, aluminum alloy, silicone, and junction box. Regarding module quality testing, wet leakage current testing is a mandatory wet insulation test for every sample during the testing process. It is also required after the photovoltaic module reliability experiment to ensure the external insulation of the photovoltaic module and guarantee the good insulation performance of the module product.

[0003] When conducting wet leakage current testing on photovoltaic (PV) modules, the modules need to be immersed in test water. After the test, the modules are removed from the water. A significant amount of test water enters the frame cavity of the PV module, and this water is carried out when the module is removed. Draining the water from the frame cavity onto the ground poses a safety hazard; therefore, the PV modules must be drained after testing. For example, CN222014419U discloses a temperature-controlled water tank for wet leakage current testing of PV modules. A water collection tank is set below one side of the main water tank. After the PV module is removed from the water, it is placed in the water collection tank, and any residual water on the PV module drips into the collection tank. Because the water collection tank is horizontally positioned, the upper and lower frames of the PV module are horizontal when supported by the water collection tank mounting frame, making it difficult to completely drain the water from the PV module. Water still drips onto the ground when the PV module is transported. Utility Model Content

[0004] The purpose of this invention is to provide a photovoltaic module wet leakage current insulation testing device, which uses an inclined drainage trough to ensure that the photovoltaic module is thoroughly drained after testing, keeping the testing environment clean.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A photovoltaic module wet leakage current insulation testing device includes a test water tank, a drainage tank, a water pump, and a temperature control device. The test water tank and the drainage tank are respectively connected to the water pump through pipelines. The water pump is connected to the temperature control device through pipelines. The temperature control device is connected to the test water tank through pipelines. The water pump is used to pump water from the test water tank and the drainage tank into the temperature control device.

[0007] The drainage trough is located on the side of the test water tank. The test water tank is set horizontally, and the drainage trough is set at an angle of 10° to 30° with the horizontal plane.

[0008] Furthermore, one end of the drainage trough is at the same height as or lower than the test water tank, and the other end of the drainage trough is lower than the test water tank.

[0009] The length of the drainage trough is greater than or equal to the length of the test water tank.

[0010] Furthermore, an inclined plate is provided between the drainage trough and the test water tank, and the side of the drainage trough and the side of the test water tank are respectively detachably connected to the inclined plate.

[0011] Furthermore, a support plate is provided inside the drainage trough, one end of the support plate is rotatably connected to the high end of the drainage trough, and the other end of the support plate is slidably engaged with the inner wall of the drainage trough.

[0012] A spring is provided between the support plate and the bottom wall of the drainage trough.

[0013] Furthermore, the support plate is provided with several drainage holes, and the top surface of the support plate is provided with anti-slip strips.

[0014] Furthermore, the bottom end of the drainage trough is provided with a baffle and a driving component, and the bottom end of the baffle is swayably connected to the drainage trough.

[0015] The driving component is connected to the side of the baffle, and the driving component is used to drive the baffle to block and open the opening at the bottom of the drainage channel. A roller is provided on the other side of the baffle.

[0016] Furthermore, one end of the test water tank is connected to a first water outlet pipe, and the bottom end of the drainage tank is connected to a second water outlet pipe. Both the first water outlet pipe and the second water outlet pipe are connected to the water pump through a circulating water pipe.

[0017] The circulating water pipe is also connected to a drain pipe, and the first outlet pipe, the circulating water pipe and the drain pipe are each equipped with a control valve.

[0018] Furthermore, the water pump is connected to a filtration mechanism.

[0019] Furthermore, a water source pipe is provided at the connection between the circulating water pipe and the water pump.

[0020] The technical solution provided by this utility model can include the following beneficial effects:

[0021] 1. Based on the inclined setting of the drainage channel, the photovoltaic module is in an inclined state inside the drainage channel, so that the four sides of the photovoltaic module are also in an inclined state. This facilitates the drainage of water in the frame cavity under the action of gravity, achieving the effect of thorough drainage of the photovoltaic module and keeping the test environment clean.

[0022] 2. The liftable and sliding support plate is used to ensure that the photovoltaic modules can enter the drainage tank smoothly, preventing damage caused by the photovoltaic modules falling into the drainage tank in a free-fall manner. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a photovoltaic module wet leakage current insulation testing device according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a photovoltaic module wet leakage current insulation testing device according to another embodiment of the present invention;

[0025] Figure 3 This is a structural diagram of the drainage trough;

[0026] Figure 4 This is a schematic diagram showing the state of the drainage channel receiving photovoltaic modules;

[0027] The components include: test water tank 1, inclined plate 11, drainage tank 2, support plate 12, spring 13, anti-slip strip 14, baffle 15, drive component 16, roller 17, water pump 3, filter mechanism 31, temperature control device 4, first water outlet pipe 5, second water outlet pipe 6, circulating water pipe 7, drainage pipe 8, control valve 9, and water source pipe 10. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] The following is combined with Figure 1 This invention describes a photovoltaic module wet leakage current insulation testing device according to an embodiment of the present invention, including a test water tank 1, a drainage tank 2, a water pump 3, and a temperature control device 4. The test water tank 1 and the drainage tank 2 are respectively connected to the water pump 3 through pipelines. The water pump 3 is connected to the temperature control device 4 through pipelines. The temperature control device 4 is connected to the test water tank 1 through a pipeline. The water pump 3 is used to pump water from the test water tank 1 and the drainage tank 2 into the temperature control device 4.

[0030] The drainage trough 2 is located on the side of the test water tank 1. The test water tank 1 is set horizontally, and the drainage trough 2 is set at an angle of 10° to 30° with the horizontal plane.

[0031] In this technical solution, the test tank 1 and the drainage tank 2 are adjacent. The photovoltaic module that has completed testing can quickly transfer from the test tank 1 to the main drainage tank 2. Due to the inclined design of the drainage tank 2, the photovoltaic module is in an inclined state within it, causing all four sides of the photovoltaic module to be inclined as well. This facilitates the drainage of water from the frame cavity under gravity, achieving thorough drainage and keeping the testing environment clean. Specifically, the angle between the drainage tank 2 and the horizontal plane is limited to 10°–30°, ensuring the photovoltaic module has a certain inclination angle and is easily positioned within the drainage tank 2. Specifically, the angle between the drainage tank 2 and the horizontal plane refers to the angle between the bottom plane of the drainage tank 2 and the horizontal plane.

[0032] On the other hand, in this technical solution, the water pump 3 draws water from the test water tank 1 and the drainage tank 2, realizing the recycling of the test water. It should be noted that industrial salt needs to be added to the test water to adjust its conductivity, and the recycling of the test water can greatly reduce the testing cost.

[0033] It should be noted that the temperature control device 4 used in this technical solution was purchased and is used to control the water temperature discharged into the test water tank 1 within the range of 20℃ to 25℃.

[0034] In one embodiment of this utility model, one end of the drainage trough 2 is at the same height as or lower than the test water tank 1, and the other end of the drainage trough 2 is lower than the test water tank 1; the length of the drainage trough 2 is greater than or equal to the length of the test water tank 1. By defining the relative position of the drainage trough 2 and the test water tank 1, the photovoltaic module can be transferred from the test water tank 1 to the drainage trough 2. When the length of the drainage trough 2 is greater than that of the test water tank 1, it can better support the photovoltaic module. Preferably, the bottom of the drainage trough 2 is 20-50 mm from the ground to facilitate the removal of the photovoltaic module from the drainage trough 2 and to facilitate the connection of the drainage trough 2 with the photovoltaic module transfer equipment.

[0035] To further prevent water droplets from falling outside the test tank 1 and the drain tank 2 during the transfer of photovoltaic modules, an inclined plate 11 is provided between the drain tank 2 and the test tank 1. The sides of the drain tank 2 and the test tank 1 are detachably connected to the inclined plate 11. The inclined plate 11 connects the drain tank 2 and the test tank 1, ensuring a dry testing environment. For example, both sides of the inclined plate 11 are connected to the drain tank 2 and the test tank 1 by screws, and the inclined plate 11 is made of plastic. The drain tank 2 and the test tank 1 can be supported by different support frames, and the inclined plate 11 also serves to define the relative positions of the drain tank 2 and the test tank 1.

[0036] like Figure 2-4As shown, in one embodiment of this utility model, a support plate 12 is provided inside the drainage trough 2. One end of the support plate 12 is rotatably connected to the high end of the drainage trough 2, and the other end of the support plate 12 is slidably engaged with the inner wall of the drainage trough 2.

[0037] A spring 13 is provided between the support plate 12 and the bottom wall of the drainage trough 2.

[0038] In this embodiment, the swingable support plate 12 is used to support the photovoltaic module. In particular, when the photovoltaic module enters the drainage trough 2, the photovoltaic module presses on the support plate 12. As the support force of the transfer mechanism or manual operation on the photovoltaic module decreases, the support plate 12 swings under the gravity of the photovoltaic module. This process allows the photovoltaic module to enter the drainage trough 2 smoothly, preventing the photovoltaic module from entering the drainage trough 2 in a free fall manner and causing damage.

[0039] By setting the length of the spring 13, the support plate 12 can be kept in a horizontal position when idle. When the photovoltaic module first comes into contact with the support plate 12, the side of the bottom frame of the photovoltaic module is in contact with the support plate 12. Under the gravity of the photovoltaic module, the support plate 12 swings and tilts synchronously with the photovoltaic module to achieve a better effect of supporting the photovoltaic module and preventing damage.

[0040] Furthermore, the support plate 12 is provided with a plurality of drainage holes, and the top surface of the support plate 12 is provided with anti-slip strips 14.

[0041] By providing drainage holes in the support plate 12, the discharged water can smoothly enter the drainage trough 2 and be discharged. The anti-slip strip 14 is used to prevent the photovoltaic module from sliding on the support plate 12. It should be noted that, since the drainage trough 2 is an inclined trough, the support plate 12 is also inclined when supporting the photovoltaic module to ensure thorough drainage. For example, the support plate 12 is a mesh plate or a flat plate with through holes; the anti-slip strip 14 is a rubber anti-slip strip or a plastic material with raised dots, and is fixed to the support plate 12 by screws or adhesive.

[0042] In order to facilitate the transfer of photovoltaic modules in the drainage trough 2 and to limit the position of the photovoltaic modules, in one embodiment of the present invention, a baffle 15 and a driving component 16 are provided at the bottom end of the drainage trough 2, and the bottom end of the baffle 15 is swayably connected to the drainage trough 2.

[0043] The driving component 16 is connected to the side of the baffle 15. The driving component 16 is used to drive the baffle 15 to block and open the opening at the bottom of the drainage trough 2. A roller 17 is provided on the other side of the baffle 15.

[0044] The state in which the baffle 15 blocks the bottom opening of the drainage trough 2 is the normal state. When the photovoltaic module is located in the drainage trough 2, the baffle 15 acts as a limit to prevent the photovoltaic module from falling out of the drainage trough 2. After the photovoltaic module has finished draining, the drive component 16 opens the bottom opening of the drainage trough 2 with the baffle 15. Based on the setting of the roller 17, the photovoltaic module can slide out from the bottom opening of the drainage trough 2, making the transfer of the photovoltaic module easier. Moreover, when the bottom opening of the drainage trough 2 corresponds to the transfer trolley, the photovoltaic module can slide directly into the transfer trolley without lifting and carrying it. It can be understood that by increasing the length of the baffle 15, a better positioning effect for the photovoltaic module can be achieved. Based on the setting of the inclined plate 11, the baffle 15 and the inclined plate 11 work together to support the photovoltaic module, so that the photovoltaic module is in a relatively stable state during drainage. In order to further ensure the stability of the photovoltaic module placed in the drainage trough 2, a baffle 15 or a stop bar can also be set on the side of the drainage trough 2 away from the test water tank 1.

[0045] Preferably, a sealing ring is provided at the edge of the bottom opening of the drainage channel 2, and the baffle 15 and the sealing ring are in contact to achieve the effect of preventing water leakage. For example, the driving component 16 is a hydraulic cylinder or a pneumatic cylinder, the driving component 16 is fixed to the bottom of the drainage channel 2, and the piston rod of the driving component 16 is connected to the baffle 15 through a connecting rod.

[0046] Reference Figure 1 and Figure 2 In order to achieve the recycling of test water, in one embodiment of this utility model, one end of the test water tank 1 is connected to a first water outlet pipe 5, and the bottom end of the drainage tank 2 is connected to a second water outlet pipe 6. Both the first water outlet pipe 5 and the second water outlet pipe 6 are connected to the water pump 3 through a circulating water pipe 7.

[0047] The circulating water pipe 7 is also connected to a drain pipe 8, and the first outlet pipe 5, the circulating water pipe 7 and the drain pipe 8 are respectively equipped with control valves 9.

[0048] Water from test tank 1 enters the circulating water pipe 7 via the first outlet pipe 5 and water from drain tank 2 via the second outlet pipe 6. It is then pumped by pump 3 into the temperature control device 4, where it is heated before being used for testing, thus achieving water circulation and saving test water. If the water quality in test tank 1 or drain tank 2 frequently changes, such as becoming cloudy, containing sediment, dirt, or having an odor, it can be drained through drain pipe 8. Multiple control valves 9 are used to switch between water circulation and drainage functions.

[0049] The water pump 3 is connected to a filter mechanism 31, and a water source pipe 10 is installed at the connection between the circulating water pipe 7 and the water pump 3. Water from both the circulating water pipe 7 and the water source pipe 10 enters the water pump 3 through the filter mechanism 31 and is then pumped into the test water tank 1. It is understood that the filter mechanism 31 is used to filter larger particulate impurities in the water, but does not filter ions in the water.

[0050] Specifically, the operation of the photovoltaic module wet leakage current insulation testing device using this technical solution is as follows:

[0051] 1. Preparation before testing: Check that the water pump 3 is working properly and the normally closed valve is closed. Turn on the water pump 3 and fill the test water tank with water to a height of about 45mm. At the same time, the temperature control device 4 heats or cools the water. The water temperature range is 20℃~25℃. If the conductivity of the solution is low, add industrial coarse salt to adjust the conductivity of the solution to meet the requirements.

[0052] 2. Connect the positive and negative terminals of the photovoltaic module to be tested to the terminals of the insulation withstand voltage tester, and then place the photovoltaic module into the test water tank 1 so that the entire photovoltaic module is submerged in the test water until no more air bubbles emerge from the water inlet holes of the frame cavity of the photovoltaic module.

[0053] 3. Turn on the wet insulation withstand voltage tester to complete the test of the photovoltaic module;

[0054] 4. Transferring the photovoltaic module: Lift the photovoltaic module in the test tank 1, disconnect the positive and negative terminals of the photovoltaic module from the terminals of the insulation withstand voltage tester, stand the photovoltaic module upright and place it into the drainage tank 2. The photovoltaic module slowly falls into the drainage tank 2 with the support of the support plate 12. The photovoltaic module is tilted in the drainage tank 2 until the drainage is complete. Open the baffle 15 to let the photovoltaic module slide out.

[0055] 5. Water temperature control for the test water: The temperature sensor of the test water tank 1 monitors the water temperature. When the water temperature is less than 20℃, the control valve 9 of the first outlet pipe 5 opens from the normally closed state, the control valve 9 of the drain pipe 8 is in the normally closed state, and the control valve 9 of the circulating water pipe 7 is in the normally open state. The water in the drain tank 2 and the test water tank 1 can return to the temperature control device 4 through the circulating water pipe 7 to be reheated and then injected into the test water tank 1 until the water temperature in the entire tank returns to the test requirement range, and then the control valve 9 of the first outlet pipe 5 is closed.

[0056] 6. Water in drainage tank 2 is recycled. The control valve 9 of the first outlet pipe 5 is normally closed, the control valve 9 of the drainage pipe 8 is normally closed, and the control valve 9 of the circulation pipe is always open. After each photovoltaic module is tested, during the draining process in drainage tank 2, the water in drainage tank 2 will return to the test water tank 1 through the recycling water pipe or enter the storage tank through the water source pipe 10. When the test water tank 1 needs to be replenished, it will return to the test water tank 1 through the temperature control device 4 to compensate for the lost test water.

[0057] 7. Test water discharge: After multiple wet leakage tests, the quality of the test water will change, such as the appearance of sediment, dirt, or odor. At this time, the water in the test water tank needs to be discharged. The control valve 9 of the first outlet pipe 5 is opened from the normally closed state, the control valve 9 of the drain pipe 8 is opened from the normally closed state, and the control valve 9 of the circulation pipe is changed from the normally open state to the closed state. After the water solution is drained, all valves return to their original state.

[0058] Other components and operations of the photovoltaic module wet leakage current insulation testing device according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0059] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0060] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0061] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0062] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module wet leakage current insulation testing device, characterized in that, The device includes a test water tank, a drain tank, a water pump, and a temperature control device. The test water tank and the drain tank are respectively connected to the water pump through pipelines. The water pump is connected to the temperature control device through pipelines. The temperature control device is connected to the test water tank through pipelines. The water pump is used to pump water from the test water tank and the drain tank into the temperature control device. The drainage trough is located on the side of the test water tank. The test water tank is set horizontally, and the drainage trough is set at an angle of 10° to 30° with the horizontal plane.

2. The photovoltaic module wet leakage current insulation testing device according to claim 1, characterized in that, One end of the drainage trough is at the same height as or lower than the test water tank, and the other end of the drainage trough is lower than the test water tank. The length of the drainage trough is greater than or equal to the length of the test water tank.

3. The photovoltaic module wet leakage current insulation testing device according to claim 1, characterized in that, An inclined plate is provided between the drainage trough and the test water tank, and the side of the drainage trough and the side of the test water tank are respectively detachably connected to the inclined plate.

4. The photovoltaic module wet leakage current insulation testing device according to claim 1, 2 or 3, characterized in that, A support plate is provided inside the drainage trough. One end of the support plate is rotatably connected to the high end of the drainage trough, and the other end of the support plate is slidably engaged with the inner wall of the drainage trough. A spring is provided between the support plate and the bottom wall of the drainage trough.

5. The photovoltaic module wet leakage current insulation testing device according to claim 4, characterized in that, The support plate is provided with several drainage holes, and the top surface of the support plate is provided with anti-slip strips.

6. The photovoltaic module wet leakage current insulation testing device according to claim 4, characterized in that, The bottom end of the drainage trough is provided with a baffle and a driving component, and the bottom end of the baffle is swayably connected to the drainage trough. The driving component is connected to the side of the baffle, and the driving component is used to drive the baffle to block and open the opening at the bottom of the drainage channel. A roller is provided on the other side of the baffle.

7. The photovoltaic module wet leakage current insulation testing device according to claim 1, 2 or 3, characterized in that, One end of the test water tank is connected to a first water outlet pipe, and the bottom end of the drainage tank is connected to a second water outlet pipe. Both the first water outlet pipe and the second water outlet pipe are connected to the water pump through a circulating water pipe. The circulating water pipe is also connected to a drain pipe, and the first outlet pipe, the circulating water pipe and the drain pipe are each equipped with a control valve.

8. The photovoltaic module wet leakage current insulation testing device according to claim 7, characterized in that, The water pump is connected to a filtration mechanism.

9. The photovoltaic module wet leakage current insulation testing device according to claim 7, characterized in that, A water source pipe is provided at the connection between the circulating water pipe and the water pump.

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