Sealing test device for photovoltaic cell string
By designing a sealed testing device with a transparent cover plate, base plate, and clamping strip, the problems of long testing time and oxidation of photovoltaic cell strings were solved, achieving efficient and accurate performance testing of cell strings.
Patent Information
- Application Number
- CN202422321862.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-09-23
AI Technical Summary
In the current photovoltaic cell string testing process, the assembly time of photovoltaic modules is long, resulting in low testing efficiency, and the cell strings are prone to oxidation during the testing process.
A sealing test device for photovoltaic cell strings was designed, including a transparent cover plate and a transparent base plate, clamping strips and an annular seal. The cover plate and base plate are clamped by the clamping strips, and the annular seal seals the area around the cell strings to ensure that they do not come into contact with the outside air during the test.
It simplifies the battery string installation process, improves testing efficiency, avoids cell oxidation, ensures testing accuracy, and has a simple structure, making it suitable for testing multiple battery strings simultaneously.
Smart Images
Figure CN223553289U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of battery string technology, specifically relating to a sealing test device for photovoltaic battery strings. Background Technology
[0002] A photovoltaic (PV) cell is an energy storage device that uses the photovoltaic effect to convert light energy into electrical energy. A PV cell consists of multiple rows of cells, each row containing multiple cells connected in series. Typically, the cell strings undergo performance testing before leaving the factory, such as current-voltage characteristic (IV) curve testing, ultraviolet (UV) testing, damp and heat testing, and temperature environment testing.
[0003] Because solar cells are prone to oxidation in air, performance testing of solar cell strings typically involves first fabricating them into photovoltaic modules. This is done by sequentially welding multiple rows of cells together to form a cell layer, then stacking the cover plate, upper encapsulation layer, cell layer, lower encapsulation layer, and base plate in sequence to form a laminate. The laminate is then subjected to electroluminescence (EL) testing. After testing, it is framed and connected to a junction box. Finally, it undergoes IV testing and finished product inspection before being packaged to obtain the photovoltaic module. This method allows for performance testing of the entire photovoltaic module under various testing environments, enabling the evaluation of various performance characteristics of the cell string. Furthermore, because the cell string is encapsulated between the cover plate and base plate of the photovoltaic module, it avoids oxidation caused by contact with the external environment. However, the long assembly time of photovoltaic modules leads to a long testing time for the cell strings, resulting in lower testing efficiency. Utility Model Content
[0004] To address the aforementioned problems in the existing technology, this utility model provides a sealing test device for photovoltaic cell strings. The technical problem to be solved by this utility model is achieved through the following technical solution:
[0005] In a first aspect, this utility model provides a sealing test device for a photovoltaic cell string, including a transparent cover plate, a transparent base plate, and two first clamping strips. The transparent cover plate and the transparent base plate are arranged opposite to each other. The transparent base plate is provided with a mounting groove for mounting the cell string. The cell string includes at least two cells connected in sequence. The first clamping strip includes an upper plate, a connecting plate, and a lower plate connected in sequence. The upper plate, the connecting plate, and the lower plate together form a first clamping groove. The transparent cover plate and the transparent base plate are clamped in the first clamping groove. The two first clamping strips are arranged opposite to each other on both sides of the transparent cover plate. An annular seal is provided between the transparent cover plate and the transparent base plate. Along the direction perpendicular to the upper surface of the transparent base plate, the projection of the mounting groove is located inside the annular projection of the annular seal.
[0006] In one embodiment of this utility model, the first end of the upper plate is connected to the connecting plate, and the second end is inclined toward the lower plate; the first end of the lower plate is connected to the connecting plate, and the second end is inclined toward the upper plate; the distance between the second end of the upper plate and the second end of the lower plate is less than the sum of the thicknesses of the transparent cover plate and the transparent bottom plate, so as to clamp the transparent cover plate and the transparent bottom plate.
[0007] In one embodiment of this utility model, the transparent cover plate is a rectangular plate, and two first clamping strips are arranged opposite to each other on both sides of the length direction of the rectangular plate; the sealing test device also includes two second clamping strips, each second clamping strip including a top plate, a middle plate and a bottom plate connected in sequence, the top plate, the middle plate and the bottom plate together form a second clamping groove, the transparent cover plate and the transparent bottom plate are clamped in the second clamping groove, and the two second clamping strips are arranged opposite to each other on both sides of the width direction of the rectangular plate.
[0008] In one embodiment of this utility model, the third and fourth ends of the upper plate are respectively provided with a first inclined surface, and the third and fourth ends of the top plate are respectively provided with a second inclined surface. The first and second inclined surfaces are attached together, and the inclination of the first and second inclined surfaces is 45°. The third and fourth ends of the lower plate are respectively provided with a third inclined surface, and the third and fourth ends of the bottom plate are respectively provided with a fourth inclined surface. The third and fourth inclined surfaces are attached together, and the inclination of the third and fourth inclined surfaces is 45°.
[0009] In one embodiment of the present invention, an annular groove is provided on the transparent base plate, and an annular seal is disposed in the annular groove; an annular protrusion is provided on the lower surface of the transparent cover plate. When the transparent cover plate is placed on the transparent base plate, the annular protrusion is inserted into the annular groove and presses the annular seal between the annular protrusion and the bottom of the annular groove.
[0010] In one embodiment of the present invention, at least two annular grooves are provided, and the at least two annular grooves are nested together in their radial direction; at least two annular protrusions are provided, and the at least two annular protrusions are nested together in their radial direction, and the at least two annular protrusions are respectively inserted into and engaged with the at least two annular grooves; at least two annular seals are provided, and the at least two annular seals are respectively disposed in the at least two annular grooves.
[0011] In one embodiment of this utility model, it further includes a male connector and a female connector; the bottom of the mounting groove is provided with a first through hole and a second through hole, the male connector and the female connector are fixed on the lower surface of the transparent base plate and correspond to the first through hole and the second through hole respectively; the busbar at one end of the battery string passes through the first through hole and is electrically connected to the male connector, and the busbar at the other end of the battery string passes through the second through hole and is electrically connected to the female connector.
[0012] In one embodiment of this utility model, a first sealing layer for sealing the first perforation is provided between the male connector and the transparent base plate, and a second sealing layer for sealing the second perforation is provided between the female connector and the transparent base plate.
[0013] In one embodiment of this utility model, a telescopic mechanism is provided in the mounting groove. One end of the telescopic mechanism is connected to the side wall of the mounting groove, and the other end extends or retracts to abut against the battery string.
[0014] In one embodiment of this utility model, a filling block is provided in the mounting groove, and the filling block fills the space between the battery string and the side wall of the mounting groove.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] In the above-mentioned solution of this application, firstly, the sealing test device includes a transparent cover plate and a transparent base plate, which are arranged opposite to each other. The transparent base plate is provided with a mounting groove for mounting battery strings, so that when the sealing test device is placed in the test chamber for testing, the light inside the test chamber can pass through the transparent cover plate and the transparent base plate and shine on the battery strings in the mounting groove to perform performance testing on the battery strings.
[0017] Secondly, the sealing test device also includes two first clamping strips. Each first clamping strip comprises an upper plate, a connecting plate, and a lower plate connected in sequence. The upper plate, connecting plate, and lower plate together form a first clamping groove, within which the transparent cover plate and the transparent base plate are clamped. The clamping of the transparent cover plate and the transparent base plate by the first clamping strips improves their stability and prevents relative movement that could affect the performance testing of the battery string. The two first clamping strips are positioned opposite each other on both sides of the transparent cover plate. Their cooperation further restricts the relative movement of the transparent cover plate and the transparent base plate, thereby further improving their stability. Thus, when performance testing of the battery string is required, the transparent cover plate can be opened first, the battery string placed in the mounting groove on the transparent base plate, the transparent cover plate closed, and then the two first clamping strips clamped onto both sides of the transparent cover plate. The entire sealing test device is then placed inside various test chambers for performance testing. Because the sealing test device described in this application has a simple structure, installation only requires opening and closing the transparent cover and removing and installing the first clamping strip. Compared with the traditional structure of installing the battery string in the photovoltaic module for testing, the sealing test device described in this application is easy to install and takes less time, thereby shortening the testing time of the battery string and improving the testing efficiency of the battery string.
[0018] In addition, an annular seal is provided between the transparent cover and the transparent base plate. Along a direction perpendicular to the upper surface of the transparent base plate, the projection of the mounting groove is located inside the projection of the annular seal. In this way, the annular seal can be nested around the outer periphery of the battery string, sealing the battery string from all sides. This prevents external air from contacting the battery string during testing, which could cause oxidation of the battery cells and affect the accuracy of the battery string test.
[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the top of the transparent cover plate and the bottom of the transparent base plate in an embodiment of this utility model;
[0021] Figure 2 This is a schematic diagram of the interior of the transparent cover plate and the interior of the transparent base plate in an embodiment of this utility model;
[0022] Figure 3 This is an exploded view of a sealing test device provided in an embodiment of this utility model;
[0023] Figure 4 This is a schematic diagram of the first clamping strip in an embodiment of this utility model;
[0024] Figure 5 This is a schematic diagram of the second clip in an embodiment of this utility model;
[0025] Figure 6 This is a three-dimensional schematic diagram of the male connector in an embodiment of this utility model;
[0026] Figure 7 These are three views of the male connector in an embodiment of this utility model;
[0027] Figure 8 This is a three-dimensional schematic diagram of the female connector in an embodiment of this utility model;
[0028] Figure 9 These are three views of the female connector in an embodiment of this utility model;
[0029] Figure 10 This is a schematic diagram of the battery string in an embodiment of this utility model;
[0030] Figure 11 This is a schematic diagram of a transparent base plate with a telescopic mechanism in an embodiment of this utility model;
[0031] Figure 12 This is a schematic diagram of a transparent base plate with a filling block in an embodiment of this utility model.
[0032] Reference numerals: 1-Transparent cover plate, 11-Annular protrusion, 2-Transparent base plate, 21-Annular groove, 22-Mounting groove, 3-First clamping strip, 31-Upper plate, 32-Connecting plate, 33-Lower plate, 4-Annular seal, 5-Second clamping strip, 51-Top plate, 52-Intermediate plate, 53-Base plate, 6-Male connector, 61-First sealing layer, 7-Female connector, 71-Second sealing layer, 8-Telescopic mechanism, 9-Filling block, 10-Battery string, 101-Bus. Detailed Implementation
[0033] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.
[0034] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model provides a sealing test device for a photovoltaic cell string 10, including a transparent cover plate 1, a transparent base plate 2, and two first clamping strips 3. The transparent cover plate 1 and the transparent base plate 2 are arranged opposite to each other. The transparent base plate 2 is provided with a mounting groove 22 for mounting the cell string 10. The cell string 10 includes at least two cells connected in sequence. The first clamping strip 3 includes an upper plate 31, a connecting plate 32, and a lower plate 33 connected in sequence. The upper plate 31, the connecting plate 32, and the lower plate 33 together form a first clamping groove. The transparent cover plate 1 and the transparent base plate 2 are clamped in the first clamping groove. The two first clamping strips 3 are arranged opposite to each other on both sides of the transparent cover plate 1. An annular seal 4 is provided between the transparent cover plate 1 and the transparent base plate 2. Along the direction perpendicular to the upper surface of the transparent base plate 2, the projection of the mounting groove 22 is located inside the annular projection of the annular seal 4.
[0035] In some embodiments of this application, the length of the transparent cover plate 1 can be 3000mm, the width can be 450mm, and the thickness can be 5mm.
[0036] In some embodiments of this application, the length of the transparent base plate 2 can be 3050mm, the width can be 500mm, and the thickness can be 18mm.
[0037] In some embodiments of this application, the transparent cover plate 1 and the transparent base plate 2 are arranged in parallel, and the upper surface of the transparent cover plate 1 is the outer surface of the transparent cover plate 1 that is away from the transparent base plate 2.
[0038] In some embodiments of this application, both the transparent cover plate 1 and the transparent base plate 2 are glass plates.
[0039] In some embodiments of this application, the length of the first clip 3 is 500 mm.
[0040] In some embodiments of this application, along the direction perpendicular to the upper surface of the transparent base plate 2, the projection of the annular seal 4 is an annular projection, and the projection of the mounting groove 22 is a rectangular projection. The projection of the mounting groove 22 being located inside the annular projection of the annular seal 4 means that the rectangular projection is located inside the annular projection, that is, the annular projection is fitted outside the rectangular projection, or the annular projection surrounds the outer periphery of the rectangular projection.
[0041] In some embodiments of this application, the battery string 10 can be placed in a test chamber for performance testing. The performance testing includes at least one of the following: test current-voltage characteristic curve (IV) test, ultraviolet (UV) test, damp cold and heat test, and temperature environment test. The test chamber includes at least one of the following: IV test chamber, UV test chamber, damp cold and heat test chamber, and temperature environment test chamber.
[0042] In the above-mentioned scheme of this application, firstly, the sealing test device includes a transparent cover plate 1 and a transparent base plate 2, which are arranged opposite to each other. The transparent base plate 2 is provided with a mounting groove 22 for mounting the battery string 10, so that when the sealing test device is placed in the test chamber for testing, the light inside the test chamber can pass through the transparent cover plate 1 and the transparent base plate 2 and irradiate the battery string 10 in the mounting groove 22 to perform performance testing on the battery string 10.
[0043] Secondly, the sealing test device also includes two first clamping strips 3. Each first clamping strip 3 includes an upper plate 31, a connecting plate 32, and a lower plate 33 connected in sequence. The upper plate 31, connecting plate 32, and lower plate 33 together form a first clamping groove. The transparent cover plate 1 and the transparent base plate 2 are clamped in the first clamping groove. By clamping the transparent cover plate 1 and the transparent base plate 2 with the first clamping strips 3, the stability of the transparent cover plate 1 and the transparent base plate 2 can be improved, preventing relative movement between the transparent cover plate 1 and the transparent base plate 2 from affecting the performance test of the battery string 10. The two first clamping strips 3 are arranged opposite each other on both sides of the transparent cover plate 1. Through the cooperation of the two first clamping strips 3, the relative movement between the transparent cover plate 1 and the transparent base plate 2 can be further restricted, thereby further improving the stability of the transparent cover plate 1 and the transparent base plate 2. Thus, when performance testing of the battery string 10 is required, the transparent cover 1 can be opened first, the battery string 10 placed in the mounting groove 22 on the transparent base plate 2, the transparent cover 1 closed, and then the two first clamping strips 3 clamped to both sides of the transparent cover 1 respectively. The sealing test device is then placed inside various test chambers for performance testing. Because the sealing test device described in this application has a simple structure, installation only requires opening and closing the transparent cover 1 and removing and installing the first clamping strips 3. Compared to the traditional structure of installing the battery string 10 in photovoltaic modules for testing, the sealing test device described in this application is easier to install and takes less time, thereby shortening the testing time of the battery string 10 and improving the testing efficiency of the battery string 10.
[0044] In addition, an annular seal 4 is provided between the transparent cover plate 1 and the transparent base plate 2. The projection of the mounting groove 22 is located inside the projection of the annular seal 4 along a direction perpendicular to the upper surface of the transparent base plate 2. In this way, the annular seal 4 can be nested around the outer periphery of the battery string 10. By sealing the battery string 10 with the annular seal 4, it is possible to prevent external air from contacting the battery string 10 during battery string testing, which could cause oxidation of the battery cells in the battery string 10 and affect the accuracy of the battery string test.
[0045] Furthermore, compared to traditional photovoltaic modules, the sealing test device described in this application is smaller in size, and multiple sealing test devices can be placed in the test chamber for testing at the same time, thereby further improving the testing efficiency of the battery string 10.
[0046] For some embodiments of this application, please refer to Figure 4 The first end of the upper plate 31 is connected to the connecting plate 32, and the second end is inclined towards the lower plate 33; the first end of the lower plate 33 is connected to the connecting plate 32, and the second end is inclined towards the upper plate 31; the distance between the second ends of the upper plate 31 and the lower plate 33 is less than the sum of the thicknesses of the transparent cover plate 1 and the transparent base plate 2, so as to clamp the transparent cover plate 1 and the transparent base plate 2. Thus, when the first clamping strip 3 is in use, the operator can pry open the first clamping strip 3 by controlling the second end of the upper plate 31 away from the second end of the lower plate 33, and then fasten the first clamping strip 3 onto the transparent cover plate 1 and the transparent base plate 2 and release the first clamping strip 3. At this time, the second end of the upper plate 31 can rebound towards the lower plate 33 under its own elasticity, and the second end of the lower plate 33 can rebound towards the upper plate 31 under its own elasticity, so that the second ends of the upper plate 31 and the second ends of the lower plate 33 can press the transparent cover plate 1 and the transparent base plate 2 tightly, preventing the transparent cover plate 1 and the transparent base plate 2 from moving relative to each other and improving the stability of the transparent cover plate 1 and the transparent base plate 2.
[0047] For some embodiments of this application, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5The transparent cover plate 1 is a rectangular plate, and two first clamping strips 3 are arranged opposite each other on both sides of the rectangular plate along its length. The sealing test device also includes two second clamping strips 5, each of which includes a top plate 51, a middle plate 52, and a bottom plate 53 connected in sequence. The top plate 51, the middle plate 52, and the bottom plate 53 together form a second clamping groove, in which the transparent cover plate 1 and the transparent bottom plate 2 are clamped. The two second clamping strips 5 are arranged opposite each other on both sides of the rectangular plate along its width. Thus, the first clamping strips 3 are arranged along the width of the transparent cover plate 1, and the second clamping strips 5 are arranged along the length of the transparent cover plate 1. The two first clamping strips 3 clamp the left and right sides of the transparent cover plate 1, and the two second clamping strips 5 clamp the front and rear sides of the transparent cover plate 1, thereby further improving the stability of the transparent cover plate 1 and the transparent bottom plate 2.
[0048] In some embodiments of this application, such as Figure 2 As shown, the length direction of the rectangular plate is... Figure 2 In the x-direction, the width direction of the rectangular plate is... Figure 2 direction y in .
[0049] In some embodiments of this application, two first clamping strips 3 are disposed opposite to each other on both sides of the rectangular plate along the length direction, that is, the first clamping strips 3 are disposed along the width direction of the rectangular plate.
[0050] In some embodiments of this application, two second clamping strips 5 are disposed opposite to each other on both sides of the rectangular plate in the width direction, that is, the second clamping strips 5 are disposed along the length direction of the rectangular plate.
[0051] In some embodiments of this application, the length of the second clip 5 can be 3050 mm.
[0052] In some embodiments of this application, the first end of the top plate 51 is connected to the middle plate 52, and the second end is inclined toward the bottom plate 53; the first end of the bottom plate 53 is connected to the middle plate 52, and the second end is inclined toward the top plate 51; the distance between the second end of the top plate 51 and the second end of the bottom plate 53 is less than the sum of the thicknesses of the transparent cover plate 1 and the transparent bottom plate 2, so as to clamp the transparent cover plate 1 and the transparent bottom plate 2. Thus, when the second clamping strip 5 is in use, the operator can pry open the second clamping strip 5 by controlling the second end of the top plate 51 away from the second end of the bottom plate 53, and then fasten the second clamping strip 5 onto the transparent cover plate 1 and the transparent bottom plate 2 and release the second clamping strip 5. At this time, the second end of the top plate 51 can rebound towards the bottom plate 53 under its own elasticity, and the second end of the bottom plate 53 can rebound towards the top plate 51 under its own elasticity, so that the second ends of the top plate 51 and the second ends of the bottom plate 53 can press the transparent cover plate 1 and the transparent bottom plate 2 tightly, preventing the transparent cover plate 1 and the transparent bottom plate 2 from moving relative to each other and improving the stability of the transparent cover plate 1 and the transparent bottom plate 2.
[0053] In some embodiments of this application, the third and fourth ends of the upper plate 31 are respectively provided with a first inclined surface, and the third and fourth ends of the top plate 51 are respectively provided with a second inclined surface. The first and second inclined surfaces are fitted together, and the inclination angles of the first and second inclined surfaces are both 45°. The third and fourth ends of the lower plate 33 are respectively provided with a third inclined surface, and the third and fourth ends of the bottom plate 53 are respectively provided with a fourth inclined surface. The third and fourth inclined surfaces are fitted together, and the inclination angles of the third and fourth inclined surfaces are both 45°. In this way, the first clamping strip 3 and the second clamping strip 5 can fit tightly together. Through the mutual restraint of the first clamping strip 3 and the second clamping strip 5, the installation stability of the first clamping strip 3 and the second clamping strip 5 can be improved. Furthermore, the first clamping strip 3 and the second clamping strip 5 can prevent external dust and other substances from entering between the transparent cover plate 1 and the transparent bottom plate 2, thereby improving the sealing performance of the sealing test device. In addition, when the inclination of the first, second, third, and fourth inclined planes is all 45°, the bonding effect of the first clamping strip 3 and the second clamping strip 5 can be improved, thereby further improving the sealing performance of the sealing test device.
[0054] In some embodiments of this application, such as Figure 2 As shown, the transparent base plate 2 has an annular groove 21, and the annular seal 4 is disposed within the annular groove 21. The lower surface of the transparent cover plate 1 has an annular protrusion 11. When the transparent cover plate 1 is placed on the transparent base plate 2, the annular protrusion 11 is inserted into the annular groove 21, pressing the annular seal 4 between the annular protrusion 11 and the bottom of the annular groove 21. Thus, by pressing the annular seal 4 within the annular groove 21 through the annular protrusion 11, the sealing performance between the transparent cover plate 1 and the transparent base plate 2 can be further improved, preventing the battery cells in the battery string 10 from contacting external air and oxidizing.
[0055] In some embodiments of this application, at least two annular grooves 21 are provided, and the at least two annular grooves 21 are nested together radially; at least two annular protrusions 11 are provided, and the at least two annular protrusions 11 are nested together radially, and the at least two annular protrusions 11 are respectively inserted into the at least two annular grooves 21; at least two annular seals 4 are provided, and the at least two annular seals 4 are respectively disposed in the at least two annular grooves 21. In this way, a multi-stage seal is achieved between the transparent cover plate 1 and the transparent base plate 2 by means of multiple annular seals 4, and the multiple annular protrusions 11 and multiple annular grooves 21 cooperate to press the multiple annular seals 4, which can further improve the sealing performance between the transparent cover plate 1 and the transparent base plate 2, and prevent the battery cells in the battery string 10 from contacting the outside air and oxidizing.
[0056] For some embodiments of this application, please refer to Figure 6 , Figure 7 , Figure 8 , Figure 9as well as Figure 10 The sealing test device also includes a male connector 6 and a female connector 7. The bottom of the mounting groove 22 has a first through hole and a second through hole. The male connector 6 and the female connector 7 are fixed to the lower surface of the transparent base plate 2 and correspond to the first and second through holes, respectively. One end of the battery string 10 has a busbar 101 that passes through the first through hole and is electrically connected to the male connector 6, while the other end of the battery string 10 has a busbar 101 that passes through the second through hole and is electrically connected to the female connector 7. Thus, the battery string 10 can be connected to an external power source via the female connector 7 and the male connector 6, allowing power to be supplied to test various performance characteristics of the battery string 10; alternatively, the battery string 10 can be connected to an external test device via the female connector 7 and the male connector 6 to test the internal current or voltage of the battery string 10 to assess its performance.
[0057] In some embodiments of this application, a connection protrusion may be provided on the busbar 101 of the battery string 10. The connection protrusion may pass through the first through hole and contact the male terminal 6 to achieve electrical connection, or the connection protrusion may pass through the second through hole and contact the female terminal 7 to achieve electrical connection.
[0058] In some embodiments of this application, both the first perforation and the second perforation are rectangular perforations with a length of 5 mm and a width of 1 mm.
[0059] In some embodiments of this application, such as Figure 7 and Figure 9 As shown, a first sealant layer 61 for sealing the first through hole is provided between the male connector 6 and the transparent base plate 2, and a second sealant layer 71 for sealing the second through hole is provided between the female connector 7 and the transparent base plate 2. Thus, sealing the first through hole with the first sealant layer 61 prevents external gas from flowing into the mounting groove 22 from the male connector 6 and the first through hole, thus preventing oxidation of the battery string 10 inside the mounting groove 22; sealing the second through hole with the second sealant layer 71 prevents external gas from flowing into the mounting groove 22 from the female connector 7 and the second through hole, thus preventing oxidation of the battery string 10 inside the mounting groove 22.
[0060] In one optional example, such as Figure 11 As shown, a telescopic mechanism 8 is provided inside the mounting groove 22. One end of the telescopic mechanism 8 is connected to the side wall of the mounting groove 22, and the other end extends or retracts to abut against the battery string 10. In this way, the telescopic mechanism 8 can extend or retract to abut against battery strings 10 of different lengths, so that battery strings 10 of different lengths can be placed in the mounting groove 22 for fixing. This allows the sealing test device to test battery strings 10 of different lengths, improving the applicability of the sealing test device. Furthermore, by pressing against the battery string 10 through the telescopic mechanism 8, the stability of the battery string 10 installation can be improved.
[0061] In some embodiments of this application, the telescopic mechanism 8 can be a lead screw and nut mechanism, which includes a lead screw, a slider, and a base. The base is fixed to the side wall of the mounting groove 22, the lead screw is fixedly connected to the base, and the slider is sleeved on the lead screw and threadedly engaged with it. Thus, the slider can be controlled to move axially along the lead screw by rotating it, allowing the slider to extend or retract to press against the battery string 10.
[0062] In another optional example, such as Figure 12 As shown, a filler block 9 is provided in the mounting groove 22, and the filler block 9 fills the space between the battery string 10 and the side wall of the mounting groove 22. Thus, when battery strings 10 of different lengths are placed in the mounting groove 22, the battery strings 10 can be fixed by filling with the filler block 9, allowing the sealing test device to test battery strings 10 of different lengths, thus improving the applicability of the sealing test device. Furthermore, the telescopic mechanism 8 presses against the battery strings 10, improving the stability of the battery string 10 installation.
[0063] In some embodiments of this application, multiple fill blocks 9 may be provided, and the widths of the multiple fill blocks 9 may be equal or unequal.
[0064] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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 element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0065] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0066] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0067] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A sealing test device for photovoltaic cell strings, characterized in that, It includes a transparent cover plate, a transparent base plate, and two first clamping strips. The transparent cover plate and the transparent base plate are arranged opposite to each other. The transparent base plate is provided with a mounting groove for mounting a battery string. The battery string includes at least two battery cells connected in sequence. The first clamping strip includes an upper plate, a connecting plate, and a lower plate connected in sequence. The upper plate, the connecting plate, and the lower plate together form a first clamping groove. The transparent cover plate and the transparent bottom plate are clamped in the first clamping groove. The two first clamping strips are arranged opposite to each other on both sides of the transparent cover plate. An annular seal is provided between the transparent cover plate and the transparent base plate. Along the direction perpendicular to the upper surface of the transparent base plate, the projection of the mounting groove is located inside the annular projection of the annular seal.
2. The sealing test device for photovoltaic cell strings according to claim 1, characterized in that, The first end of the upper plate is connected to the connecting plate, and the second end is inclined toward the lower plate; The first end of the lower plate is connected to the connecting plate, and the second end is inclined toward the upper plate; The distance between the second end of the upper plate and the second end of the lower plate is less than the sum of the thicknesses of the transparent cover plate and the transparent base plate, so as to clamp the transparent cover plate and the transparent base plate.
3. The sealing test device for photovoltaic cell strings according to claim 1 or 2, characterized in that, The transparent cover is a rectangular plate, and the two first clips are arranged opposite each other on both sides of the rectangular plate along its length. The sealing test device further includes two second clamping strips, each comprising a top plate, a middle plate, and a bottom plate connected in sequence. The top plate, the middle plate, and the bottom plate together form a second clamping groove. The transparent cover plate and the transparent bottom plate are clamped within the second clamping groove. The two second clamping strips are arranged opposite each other on both sides of the width direction of the rectangular plate.
4. The sealing test device for photovoltaic cell strings according to claim 3, characterized in that, The upper plate has a first inclined surface at its third and fourth ends, and the top plate has a second inclined surface at its third and fourth ends. The first inclined surface and the second inclined surface are in contact with each other, and the inclination of the first inclined surface and the second inclined surface is 45°. The lower plate has a third inclined surface at its third and fourth ends, and the bottom plate has a fourth inclined surface at its third and fourth ends. The third and fourth inclined surfaces are in contact with each other, and the inclination of the third and fourth inclined surfaces is 45°.
5. The sealing test device for photovoltaic cell strings according to claim 1, characterized in that, The transparent base plate is provided with an annular groove, and the annular seal is disposed in the annular groove; The lower surface of the transparent cover plate is provided with an annular protrusion. When the transparent cover plate is placed on the transparent base plate, the annular protrusion is inserted into the annular groove and presses the annular seal between the annular protrusion and the bottom of the annular groove.
6. The sealing test device for photovoltaic cell strings according to claim 5, characterized in that, The annular groove is provided in at least two parts, and the at least two annular grooves are nested together in their radial direction; The annular protrusions are provided in at least two, and the at least two annular protrusions are nested together along their radial direction, and the at least two annular protrusions are respectively inserted into and engaged with the at least two annular grooves; The annular seal is provided in at least two parts, and the at least two annular seals are respectively disposed in at least two annular grooves.
7. The sealing test device for photovoltaic cell strings according to claim 1, characterized in that, It also includes male and female connectors; The bottom of the mounting groove is provided with a first through hole and a second through hole. The male connector and the female connector are fixed to the lower surface of the transparent base plate and correspond to the first through hole and the second through hole, respectively. The busbar at one end of the battery string passes through the first through hole and is electrically connected to the male connector, while the busbar at the other end of the battery string passes through the second through hole and is electrically connected to the female connector.
8. The sealing test device for photovoltaic cell strings according to claim 7, characterized in that, A first sealant layer for sealing the first perforation is provided between the male connector and the transparent base plate, and a second sealant layer for sealing the second perforation is provided between the female connector and the transparent base plate.
9. The sealing test device for photovoltaic cell strings according to claim 1, characterized in that, The mounting slot is equipped with a telescopic mechanism. One end of the telescopic mechanism is connected to the side wall of the mounting slot, and the other end extends or retracts to abut against the battery string.
10. The sealing test device for photovoltaic cell strings according to claim 1, characterized in that, The mounting slot is provided with a filling block, which fills the space between the battery string and the side wall of the mounting slot.