Sealing test device for photovoltaic single cell

Abstract

The utility model discloses a sealing test device for a photovoltaic single cell, which comprises a transparent cover plate, a transparent bottom plate, a hinge and a clamp, and is characterized in that the transparent cover plate and the transparent bottom plate are oppositely arranged, the transparent bottom plate is provided with a mounting groove for mounting the cell, and the transparent cover plate and the transparent bottom plate are hinged through the hinge; the clamp comprises a first clamping jaw and a second clamping jaw, the transparent cover plate and the transparent bottom plate are clamped between the first clamping jaw and the second clamping jaw, and the hinge and the clamp are oppositely arranged on the two sides of the transparent cover plate; an annular sealing piece is arranged between the transparent cover plate and the transparent bottom plate, and the projection of the mounting groove is located on the inner side of the projection of the annular sealing piece in the direction perpendicular to the upper surface of the transparent cover plate, so that the test time of the battery piece can be shortened, and the test efficiency of the battery piece is improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a sealing test device for photovoltaic single cells. 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 PV cells connected in series or parallel. Typically, PV cells need to undergo performance testing before leaving the factory, such as current-voltage characteristic curve (IV) testing, ultraviolet (UV) testing, damp and heat testing, and temperature environment testing.

[0003] Because photovoltaic (PV) cells are prone to oxidation in air, performance testing typically involves first fabricating PV modules from the cells. This process involves welding multiple PV cells together to form a cell layer, then sequentially stacking a cover plate, upper encapsulation layer, cell layer, lower encapsulation layer, and base plate 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 final product inspection before being packaged to obtain the PV module. This method, by placing the entire PV module under various testing environments, allows for the evaluation of various PV cell performance parameters. Furthermore, because the cells are encapsulated between the cover plate and base plate of the PV module, oxidation from contact with the external environment is prevented. However, the lengthy assembly time of PV modules leads to a longer testing time for the PV cells, 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 single-cell solar cells. 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 photovoltaic single cells, including a transparent cover plate, a transparent base plate, a hinge, and a clamp. 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. The transparent cover plate and the transparent base plate are hinged together by the hinge. The clamp includes a first clamp and a second clamp. The transparent cover plate and the transparent base plate are clamped between the first clamp and the second clamp. The hinge and the clamp 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 cover plate, the projection of the mounting groove is located inside the projection of the annular seal.

[0006] In one embodiment of the present invention, an annular groove is provided on the lower surface of the transparent cover plate, and an annular seal is disposed in the annular groove; an annular protrusion is provided on the upper surface of the transparent base 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.

[0007] In one embodiment of this utility model, the end face of the annular protrusion away from the transparent base plate is a first arc-shaped surface, and the bottom surface of the annular groove is a second arc-shaped surface. The curvatures of the first arc-shaped surface and the second arc-shaped surface are equal.

[0008] In one embodiment of this utility model, at least two clamps are provided, and the at least two clamps are distributed at intervals along the circumference of the transparent cover plate, and the distance between any two adjacent clamps is equal, and one of the clamps and the hinge are arranged opposite to each other.

[0009] In one embodiment of this utility model, the first clamp and the second clamp are parallel to each other and fixedly connected, and the distance between the first clamp and the second clamp is less than the sum of the thicknesses of the transparent cover plate and the transparent base plate; or, the clamp further includes a connecting shaft and a torsion spring, the first clamp and the second clamp are both rotatably connected to the connecting shaft, and the torsion spring is sleeved outside the connecting shaft. When the first clamp and the second clamp rotate and open, they squeeze the torsion spring so as to clamp the transparent cover plate and the transparent base plate under the elastic action of the torsion spring.

[0010] In one embodiment of this utility model, both the transparent cover plate and the transparent base plate are rectangular plates. The hinge includes a first leaf piece, a pivot, and a second leaf piece. Both the first leaf piece and the second leaf piece are rotatably connected to the pivot. The left side of the transparent cover plate and the left side of the transparent base plate are fixedly connected to the first leaf piece and the second leaf piece, respectively. The left side of the transparent cover plate is a first inclined surface, and the left side of the transparent base plate is a second inclined surface. The first inclined surface and the second inclined surface are arranged opposite to each other, and the inclination angle of both is 45°.

[0011] In one embodiment of this utility model, the front, rear, and right sides of the transparent cover plate are all inclined surfaces with an angle of 45°, and the front, rear, and right sides of the transparent base plate are all inclined surfaces with an angle of 45°.

[0012] In one embodiment of this utility model, both the transparent cover plate and the transparent base plate are glass plates.

[0013] In one embodiment of the present invention, the mounting groove includes a first groove and a second groove, which are arranged sequentially along a direction perpendicular to the upper surface of the transparent base plate and toward the transparent cover plate, and the width of the first groove is smaller than the width of the second groove.

[0014] In one embodiment of the present invention, the mounting groove includes a third groove and a fourth groove, both of which are strip-shaped grooves, and are located on the same plane and are perpendicular to each other.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In the above-mentioned scheme 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 the battery cells, 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 cells in the mounting groove to perform performance testing on the battery cells.

[0017] Secondly, the sealing test device also includes hinges and clamps. The transparent cover and transparent base plate are hinged together, allowing the transparent cover to rotate and open or close relative to the transparent base plate, thus facilitating the placement or removal of the battery cells by operators. The clamps include a first jaw and a second jaw, clamping the transparent cover and transparent base plate between them. This clamping improves the stability of the transparent cover and base plate, preventing relative movement that could affect the battery cell performance testing. The hinges and clamps are positioned opposite each other on both sides of the transparent cover. Their cooperation further restricts relative movement between the transparent cover and base plate, further enhancing their stability. Thus, when battery cell performance testing is required, the transparent cover can be opened first, the battery cell placed in the mounting slot on the transparent base plate, the transparent cover closed, and then the clamps used to clamp the transparent cover and base plate. The entire sealing test device can then be 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 disassembling the clamps. Compared with the traditional structure of installing solar cells in photovoltaic modules for testing, the sealing test device described in this application is easy to install and takes less time, thereby shortening the testing time of solar cells and improving the testing efficiency of photovoltaic solar cells.

[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 cover, the projection of the mounting groove is located inside the projection of the annular seal. In this way, the annular seal can be nested inside the outer side of the solar cell, sealing the solar cell from all sides. This prevents external air from contacting the solar cell during testing, which could lead to oxidation and affect the accuracy of the testing.

[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 a sealing test device provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the sealing test device at the hinge in an embodiment of this utility model;

[0022] Figure 3 This is an exploded view of the sealing test device at the hinge in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the transparent base plate in an embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram showing the transparent base plate and transparent cover plate in an open state in an embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of the first and second grooves in an embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the third and fourth grooves in an embodiment of this utility model.

[0027] Reference numerals: 1-Transparent cover plate, 11-Annular groove, 2-Transparent base plate, 21-Mounting groove, 211-First groove, 212-Second groove, 213-Third groove, 214-Fourth groove, 22-Annular protrusion, 3-Hinge, 4-Clamp, 41-First gripper, 42-Second gripper, 5-Battery piece. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a sealing test device for photovoltaic single cells, including a transparent cover plate 1, a transparent base plate 2, a hinge 3, and a clamp 4. 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 21 for mounting the cell 5. The transparent cover plate 1 and the transparent base plate 2 are hinged together by the hinge 3. The clamp 4 includes a first clamp 41 and a second clamp 42. The transparent cover plate 1 and the transparent base plate 2 are clamped between the first clamp 41 and the second clamp 42. The hinge 3 and the clamp 4 are arranged opposite to each other on both sides of the transparent cover plate 1. An annular seal 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 cover plate 1, the projection of the mounting groove 21 is located inside the projection of the annular seal.

[0030] For some embodiments of this application, please refer to Figure 4 The mounting groove 21 can be a square groove with a length and width of 220 mm and a depth of 200 μm. Alternatively, the mounting groove 21 can also be a rectangular groove.

[0031] In some embodiments of this application, the depth of the mounting groove 21 is less than the thickness of the battery cell 5. This allows the upper end of the battery cell 5 to protrude beyond the transparent base plate 2 after it is installed in the mounting groove 21. This ensures that when the transparent cover plate 1 is placed on the transparent base plate 2, the lower surface of the transparent cover plate 1 can adhere tightly to the battery cell 5, preventing light reflection loss when a gap exists between the transparent cover plate 1 and the battery cell 5, which would affect the performance testing of the battery cell 5.

[0032] In some embodiments of this application, the length of the mounting groove 21 is greater than the length of the battery cell 5. This creates a gap between the sidewall of the mounting groove 21 and the side of the battery cell 5, making installation of the battery cell 5 easier. Alternatively, the width of the mounting groove 21 is greater than the width of the battery cell 5. This also creates a gap between the sidewall of the mounting groove 21 and the side of the battery cell 5, making installation of the battery cell 5 easier.

[0033] In some embodiments of this application, the length and width of the battery cell 5 can be 210 mm, and the thickness can be 150 μm.

[0034] In some embodiments of this application, the mounting groove 21 is located at the center of the transparent base plate 2.

[0035] In some embodiments of this application, the hinge 3 is located at the center of the left side of the transparent cover plate 1, and the clamp 4 is located at the center of the right side of the transparent cover plate 1.

[0036] In some embodiments of this application, the two sides of the annular seal along its axial direction abut against the upper surface of the transparent base plate 2 and the lower surface of the transparent cover plate 1, respectively.

[0037] In some embodiments of this application, the annular seal may be adhered to one of the transparent base plate 2 and the transparent cover plate 1.

[0038] In some embodiments of this application, when the transparent cover plate 1 is placed on the transparent base plate 2, the transparent cover plate 1 and the transparent base plate 2 are locked together; when the transparent cover plate 1 is rotated and unfolded in a direction away from the transparent base plate 2, the transparent cover plate 1 and the transparent base plate 2 are open.

[0039] In some embodiments of this application, the battery cell 5 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.

[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 is an annular projection, and the projection of the mounting groove 21 is a rectangular projection. The projection of the mounting groove 21 being located inside the projection of the annular seal means that the rectangular projection is located inside the annular projection, that is, the annular projection is fitted outside the rectangular projection.

[0041] 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 21 for mounting the battery cell 5, 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 cell 5 in the mounting groove 21 to perform performance testing on the battery cell 5.

[0042] Secondly, the sealing test device also includes a hinge 3 and a clamp 4. The transparent cover plate 1 and the transparent base plate 2 are hinged together by the hinge 3, allowing the transparent cover plate 1 to rotate and open or close relative to the transparent base plate 2, thus facilitating the operation of personnel to open the transparent cover plate 1 to place or remove the battery cell 5. The clamp 4 includes a first clamping jaw 41 and a second clamping jaw 42. The transparent cover plate 1 and the transparent base plate 2 are clamped between the first clamping jaw 41 and the second clamping jaw 42. By clamping the transparent cover plate 1 and the transparent base plate 2 by the clamp 4, 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 cell 5. The hinge 3 and the clamp 4 are arranged opposite each other on both sides of the transparent cover plate 1. Through the cooperation of the hinge 3 and the clamp 4, 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 solar cell 5 is required, the transparent cover 1 can be opened first, the solar cell 5 placed in the mounting groove 21 on the transparent base plate 2, the transparent cover 1 closed, and then the transparent cover 1 and the transparent base plate 2 clamped together by the clamp 4. 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 disassembling the clamp 4. Compared to the traditional structure of installing the solar cell 5 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 solar cell 5 and improving the testing efficiency of the solar cell 5.

[0043] In addition, an annular seal is provided between the transparent cover plate 1 and the transparent base plate 2. Along a direction perpendicular to the upper surface of the transparent cover plate 1, the projection of the mounting groove 21 is located inside the projection of the annular seal. Thus, the annular seal can be nested around the outer side of the battery cell 5, sealing the battery cell 5 from all sides. This prevents external air from contacting the battery cell 5 during testing, which could lead to oxidation and affect the accuracy of the battery cell 5 test.

[0044] 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 solar cell 5.

[0045] In some embodiments of this application, an annular groove 11 is provided on the lower surface of the transparent cover plate 1, and an annular seal is disposed within the annular groove 11; an annular protrusion 22 is provided on the upper surface of the transparent base plate 2. When the transparent cover plate 1 is placed on the transparent base plate 2, the annular protrusion 22 is inserted into the annular groove 11, and the annular seal is pressed between the annular protrusion 22 and the bottom of the annular groove 11. In this way, by pressing the annular seal within the annular groove 11 through the annular protrusion 22, the sealing performance between the transparent cover plate 1 and the transparent base plate 2 can be further improved, preventing the battery cell 5 from contacting external air and oxidizing.

[0046] In some embodiments of this application, the end face of the annular protrusion 22 away from the transparent base plate 2 is a first arc-shaped surface, and the bottom surface of the annular groove 11 is a second arc-shaped surface, with equal curvature of the first and second arc-shaped surfaces. Thus, when the transparent cover 1 is rotated onto the transparent base plate 2, the annular groove 11 is rotated and fastened onto the annular protrusion 22 relative to the hinge 3. When the end face of the annular protrusion 22 away from the transparent base plate 2 is the first arc-shaped surface, and the bottom surface of the annular groove 11 is the second arc-shaped surface, it can prevent the sidewall of the annular groove 11 from abutting and limiting the movement of the transparent cover 1 during the rotation of the annular groove 11 onto the annular protrusion 22, thus avoiding the inability to close the transparent cover 1 or a poor closing effect between the transparent cover 1 and the transparent base plate 2, which in turn affects the performance testing of the battery cell 5. When the curvatures of the first and second arc surfaces are equal, the annular seal can fit tightly into the annular groove 11, thereby improving the sealing performance between the annular seal and the bottom of the annular groove 11, improving the sealing performance between the annular seal and the annular protrusion 22, and further improving the sealing performance between the transparent cover plate 1 and the transparent base plate 2, thus preventing the battery cell 5 from oxidizing.

[0047] In some embodiments of this application, such as Figure 1As shown, at least two clamps 4 are provided, and the at least two clamps 4 are distributed at intervals along the circumference of the transparent cover plate 1, and the distance between any two adjacent clamps 4 is equal. One of the clamps 4 is arranged opposite to the hinge 3. In this way, by clamping the transparent cover plate 1 and the transparent base plate 2 with multiple clamps 4, the stability between the transparent cover plate 1 and the transparent base plate 2 can be further improved.

[0048] In some embodiments of this application, the number of clamps 4 can be 2, 4, 6, 8, etc.

[0049] In one possible example, the first gripper 41 and the second gripper 42 are parallel to each other and fixedly connected, and the distance between the first gripper 41 and the second gripper 42 is less than the sum of the thicknesses of the transparent cover plate 1 and the transparent base plate 2. Thus, when the clamp 4 is installed on the transparent cover plate 1 and the transparent base plate 2, the operator can control the first gripper 41 to deform and unfold relative to the second gripper 42, placing the clamp 4 outside the transparent cover plate 1 and the transparent base plate 2; then, the operator releases the clamp 4, and the first gripper 41 and the second gripper 42 retract under the force of their own deformation, thereby clamping the transparent cover plate 1 and the transparent base plate 2.

[0050] In another possible example, the clamp 4 also includes a connecting shaft and a torsion spring. The first jaw 41 and the second jaw 42 are rotatably connected to the connecting shaft. The torsion spring is sleeved outside the connecting shaft. When the first jaw 41 and the second jaw 42 rotate and open, they compress the torsion spring, thus clamping the transparent cover plate 1 and the transparent base plate 2 under the elastic action of the torsion spring. Thus, when the clamp 4 is installed on the transparent cover plate 1 and the transparent base plate 2, the operator can control the first jaw 41 to rotate and unfold relative to the second jaw 42 around the connecting shaft. Simultaneously, the first jaw 41 compresses the torsion spring, causing it to elastically deform. Afterward, the operator releases the clamp 4, and the first jaw 41 and the second jaw 42 retract under the elastic force of the torsion spring, thereby clamping the transparent cover plate 1 and the transparent base plate 2.

[0051] In some embodiments of this application, such as Figure 5 As shown, both the transparent cover plate 1 and the transparent base plate 2 are rectangular plates. The hinge 3 includes a first leaf, a pivot, and a second leaf. Both the first and second leaf are rotatably connected to the pivot. The left side of the transparent cover plate 1 and the left side of the transparent base plate 2 are fixedly connected to the first and second leaf, respectively. The left side of the transparent cover plate 1 is a first inclined surface, and the left side of the transparent base plate 2 is a second inclined surface. The first and second inclined surfaces are arranged opposite each other, and their inclination angles are both 45°. In this way, a rotational space can be formed between the first and second inclined surfaces, which facilitates the rotation and unfolding of the transparent cover plate 1 relative to the transparent base plate 2. Furthermore, when the inclination angles of the first and second inclined surfaces are both 45°, after the transparent cover plate 1 is rotated and unfolded relative to the transparent base plate 2, the transparent base plate 2 is placed horizontally, and the transparent cover plate 1 can be placed vertically, thereby facilitating the removal or placement of the battery cells 5.

[0052] In some embodiments of this application, the front, rear, and right sides of the transparent cover plate 1 are all inclined surfaces with an angle of 45°, and the front, rear, and right sides of the transparent base plate 2 are all inclined surfaces with an angle of 45°. Thus, a triangular grasping space with a right-angled apex can be formed between the transparent cover plate 1 and the transparent base plate 2, facilitating the operator's control of opening or closing the transparent cover plate 1.

[0053] In some embodiments of this application, both the transparent cover plate 1 and the transparent base plate 2 are glass plates. In this way, light inside the test chamber can both pass through the glass plate to illuminate the battery cell 5 and the glass plate can also protect the battery cell 5.

[0054] For some embodiments of this application, please refer to Figure 6 The mounting slot 21 includes a first slot 211 and a second slot 212, which are arranged sequentially along a direction perpendicular to the upper surface of the transparent base plate 2 and toward the transparent cover plate 1. The width of the first slot 211 is smaller than the width of the second slot 212. Thus, two types of battery cells 5 of different sizes can be placed in the first slot 211 and the second slot 212, thereby improving the applicability of the sealing test device.

[0055] In some embodiments of this application, the length of the first groove 211 can be greater than or less than the length of the second groove 212.

[0056] In some embodiments of this application, the depth of the first groove 211 can be greater than or less than the depth of the second groove 212.

[0057] For some embodiments of this application, please refer to Figure 7 The mounting slot 21 includes a third slot 213 and a fourth slot 214, both of which are strip-shaped slots. The third slot 213 and the fourth slot 214 are located on the same plane and are perpendicular to each other. In this way, two types of battery cells 5 of different sizes can be placed in the third slot 213 and the fourth slot 214, thereby improving the applicability of the sealing test device.

[0058] In some embodiments of this application, the length of the third slot 213 may be greater than or less than the length of the fourth slot 214.

[0059] In some embodiments of this application, the depth of the third groove 213 can be greater than or less than the depth of the fourth groove 214.

[0060] In some embodiments of this application, the width of the third groove 213 may be greater than the width of the second groove 212, or less than or equal to the width of the fourth groove 214.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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 a photovoltaic single cell, characterized in that, The device includes a transparent cover plate, a transparent base plate, a hinge, and a clamp. 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 battery cells. The transparent cover plate and the transparent base plate are hinged together by the hinge. The clamp includes a first clamp and a second clamp, the transparent cover and the transparent base are clamped between the first clamp and the second clamp, and the hinge and the clamp are disposed opposite to each other on both sides of the transparent cover; An annular seal is provided between the transparent cover plate and the transparent base plate. The projection of the mounting groove is located inside the projection of the annular seal in a direction perpendicular to the upper surface of the transparent cover plate.

2. The sealing test device for photovoltaic single cells according to claim 1, characterized in that, The lower surface of the transparent cover plate is provided with an annular groove, and the annular seal is disposed in the annular groove; The upper surface of the transparent base 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 the annular seal is pressed between the annular protrusion and the bottom of the annular groove.

3. The sealing test device for photovoltaic single cells according to claim 2, characterized in that, The end face of the annular protrusion furthest from the transparent base plate is a first arc-shaped surface, and the bottom surface of the annular groove is a second arc-shaped surface. The curvatures of the first arc-shaped surface and the second arc-shaped surface are equal.

4. The sealing test device for photovoltaic single cells according to claim 1, characterized in that, The clamps are provided in at least two, and the at least two clamps are distributed at intervals along the circumference of the transparent cover plate, and the distance between any two adjacent clamps is equal, and one of the clamps is arranged opposite to the hinge.

5. The sealing test device for photovoltaic single cells according to claim 1 or 4, characterized in that, The first gripper and the second gripper are parallel to each other and fixedly connected. The distance between the first gripper and the second gripper is less than the sum of the thicknesses of the transparent cover plate and the transparent base plate. Alternatively, the clamp may further include a connecting shaft and a torsion spring, with the first and second jaws rotatably connected to the connecting shaft. The torsion spring is sleeved outside the connecting shaft. When the first and second jaws rotate open, they squeeze the torsion spring to clamp the transparent cover plate and the transparent base plate under the elastic action of the torsion spring.

6. The sealing test device for photovoltaic single cells according to claim 1, characterized in that, Both the transparent cover plate and the transparent base plate are rectangular plates. The hinge includes a first leaf, a pivot, and a second leaf. Both the first leaf and the second leaf are rotatably connected to the pivot. The left side of the transparent cover plate and the left side of the transparent base plate are fixedly connected to the first leaf and the second leaf, respectively. The left side of the transparent cover plate is a first inclined surface, and the left side of the transparent base plate is a second inclined surface. The first inclined surface and the second inclined surface are arranged opposite to each other, and the inclination angle of both is 45°.

7. The sealing test device for photovoltaic single cells according to claim 6, characterized in that, The front, rear, and right sides of the transparent cover plate are all inclined surfaces with an angle of 45°, and the front, rear, and right sides of the transparent base plate are all inclined surfaces with an angle of 45°.

8. The sealing test device for photovoltaic single cells according to claim 1, characterized in that, Both the transparent cover plate and the transparent base plate are glass plates.

9. The sealing test device for photovoltaic single cells according to claim 1, characterized in that, The mounting groove includes a first groove and a second groove. The first groove and the second groove are arranged sequentially along a direction perpendicular to the upper surface of the transparent base plate and toward the transparent cover plate. The width of the first groove is smaller than the width of the second groove.

10. The sealing test apparatus for photovoltaic single cells according to claim 1 or 9, characterized in that, The mounting groove includes a third groove and a fourth groove, both of which are strip-shaped grooves. The third groove and the fourth groove are located on the same plane and are perpendicular to each other.

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