A test fixture for solar cells

Abstract

This invention provides a testing fixture for solar cells, comprising a positioning part and a testing part. The positioning part is equipped with a contact component. The testing part has a measuring hole penetrating through it perpendicular to its thickness direction. The positioning part and the testing part are arranged opposite to each other, forming a testing space for accommodating the battery under test. The contact component makes electrical contact with the positive and negative electrodes of the battery under test in the testing space. Test light shines on the battery under test through the measuring hole. This testing fixture enables IV testing of the battery under test. The testing space provided by the positioning part is used to accommodate and position the battery under test, and the testing part can clamp the battery under test and perform IV testing using the measuring hole. This testing fixture integrates all the necessary components for testing, making the testing process easy to operate, saving time and effort, improving testing efficiency and convenience, and also meeting the needs of large-scale battery testing.

Description

Technical Field

[0001] This application relates to the field of solar cell technology, and in particular to a test fixture for solar cells. Background Technology

[0002] As a core direction of clean and renewable energy, the development of solar photovoltaic technology is crucial to achieving carbon neutrality. In recent years, perovskite solar cells have become one of the most disruptive candidates in next-generation photovoltaic technology due to their excellent photoelectric conversion efficiency, relatively low material and manufacturing costs, and excellent solution processing potential.

[0003] Perovskite solar cells require IV (current-voltage) testing for performance evaluation. However, current IV parameter testing procedures for perovskite solar cells of specific sizes are quite cumbersome. Specifically, a light-shielding sheet is first placed over the cell, then two clips wrapped with copper foil are used to clamp the sheet and the positive and negative electrodes of the cell. After testing, the sheet is removed, the cell is replaced, and the above steps are repeated. This entire testing process is not only cumbersome but also requires various test pieces and specialized personnel, consuming significant manpower and resources. It also fails to meet the needs of large-scale cell testing due to its slow testing speed.

[0004] Therefore, it is necessary to design a testing fixture for solar cells to solve the above problems. Utility Model Content

[0005] In view of this, in order to overcome the shortcomings of the prior art, this utility model provides a testing fixture for solar cells, which effectively solves the problems of the existing solar cell testing process being cumbersome, costly in terms of manpower and resources, and unable to meet the needs of large-scale battery testing.

[0006] According to the present invention, a testing fixture for solar cells includes a positioning part and a testing part. The positioning part is provided with a contact component. The testing part is provided with a measuring hole penetrating perpendicular to the thickness direction of the testing part. The positioning part and the testing part are disposed opposite to each other, and a testing space for accommodating the battery under test is formed between the positioning part and the testing part. The testing space is used to accommodate the battery under test. The positioning part is provided with a contact component that contacts the positive and negative electrodes of the battery under test. The electrical contact component is used to make electrical connection contact with the positive and negative electrodes of the battery under test in the testing space. The testing part has a measuring hole, and test light is irradiated onto the battery under test through the measuring hole to perform testing.

[0007] Preferably, the positioning part and the testing part are connected by an elastic component, which is disposed at the end of the positioning part and the end of the testing part.

[0008] Preferably, the elastic component includes a first clamping plate disposed at the end of the positioning portion, a second clamping plate disposed at the end of the testing portion, and an elastic member connecting the first clamping plate and the second clamping plate.

[0009] Preferably, the elastic component is provided at both opposite ends of the positioning part.

[0010] Preferably, the positioning part includes a positioning plate and a positioning post. The positioning post is disposed on the periphery of the positioning plate. When the battery under test is disposed in the test space, the battery under test can abut against the positioning post to achieve positioning.

[0011] Preferably, the contact component is disposed on the positioning plate in an adjustable position.

[0012] Preferably, the contact assembly includes a contact groove and a contact element, the positioning plate has two opposing contact grooves, and the two ends of the contact element are respectively disposed in the two opposing contact grooves.

[0013] Preferably, the contact element is slidably disposed along the length direction of the contact groove.

[0014] Preferably, the positioning plate is formed as a cuboid plate, and there are multiple positioning posts, which are arranged vertically on the outer side of the cuboid plate.

[0015] Preferably, the measuring hole is a square hole with a side length of 1 cm.

[0016] According to this utility model, a testing fixture for solar cells integrates multiple test components in the original testing process to form a positioning section and a testing section. Through the cooperation of the positioning section and the testing section, IV testing of the battery under test can be achieved. The testing space provided by the positioning section is used to accommodate and position the battery under test, while the testing section clamps the battery under test and performs IV testing using the provided measuring holes. This testing fixture for solar cells integrates all the necessary components into one unit, making the testing process easier to operate, saving time and effort, improving testing efficiency and convenience, and also meeting the needs of large-scale battery testing.

[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of a test fixture for solar cells according to an embodiment of the present invention is shown; Figure 2 An exploded view of a test fixture for solar cells according to an embodiment of the present invention is shown; Figure 3 A bottom view of a test fixture for solar cells according to an embodiment of the present invention is shown; Figure 4 A side view of a test fixture for solar cells according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of the positioning plate according to a second embodiment of the present invention is shown.

[0020] Reference numerals: 1-Positioning part; 101-Positioning plate; 102-Positioning post; 2-Testing part; 201-Testing plate; 3-Testing space; 4-Contact component; 401-Contact groove; 402-Contact element; 5-Measuring hole; 6-Elastic component; 601-First clamping plate; 602-Second clamping plate; 603-Elastic element; 604-Fixing plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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 application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" 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 application based on the specific circumstances.

[0025] According to the present invention, a test fixture for solar cells is provided, such as... Figures 1 to 4 As shown, this solar cell test fixture is used for IV testing of a cell under test, such as a solar cell. By using test light to simulate sunlight irradiating the cell under test, the IV characteristic curve of the cell under test is measured to detect its performance. The solar cell test fixture includes a positioning part 1 and a testing part 2.

[0026] In the following description, reference will be made to Figures 1 to 5 This paper describes the detailed structure of the positioning part 1 and the testing part 2 of the solar cell testing fixture. This solar cell testing fixture integrates various workpieces used in previous testing methods into a single integrated testing fixture, enabling operators to perform IV testing on large quantities of cells of various specifications.

[0027] like Figures 1 to 5As shown, in this embodiment, the positioning part 1 is used for placing and positioning the battery under test. The testing part 2 cooperates with the positioning part 1 to clamp the battery under test and perform IV testing. Specifically, a testing space 3 is provided between the positioning part 1 and the testing part 2 to accommodate the battery under test (i.e., a solar cell, which in this embodiment can be, for example, a perovskite cell with a cuboid structure). The testing space 3 is not a solid structure, but an installation space defined by the positioning part 1 and the testing part 2. This installation space can be modified according to the shape of the positioning part 1 and the testing part 2 to accommodate batteries under test with different structures. For example, in this embodiment, the positioning part 1 and the testing part 2 are formed into an approximately cuboid plate structure, and the corresponding installation space can accommodate a cuboid perovskite cell. The positioning part 1 and the testing part 2 can also be formed into circular or square plates, and the corresponding installation space can accommodate circular or square cells. The operator can select the appropriate shape of the positioning part 1 and the testing part 2 in advance according to the specifications of the batch of batteries under test, so as to facilitate the quick installation and positioning of the batteries under test.

[0028] Furthermore, the positioning unit 1 is provided with contact components 4 that contact the positive and negative terminals of the battery under test. Current is transmitted between the positive and negative terminals of the battery under test through the contact components 4 to meet the testing requirements of IV testing. The testing unit 2 may include a test plate 201, which has a measurement hole 5. Test light shines on the battery under test through the measurement hole 5 for testing. The measurement hole 5 limits the illumination area of ​​the test light, thereby meeting the testing requirements of IV testing. In use, the operator can directly insert the battery under test into the testing space 3 between the positioning unit 1 and the testing unit 2, fine-tune its position so that the positive and negative terminals of the battery under test correspond to the contact components 4, achieving a conductive connection, and then the test can be performed.

[0029] This solar cell testing fixture integrates multiple test components from the original testing process into a positioning section 1 and a testing section 2. Through the cooperation of the positioning section 1 and the testing section 2, IV testing of the battery under test can be performed. The testing space 3 provided by the positioning section 1 is used to accommodate and position the battery under test, while the testing section 2 clamps the battery under test and performs IV testing using the provided measuring holes 5. This solar cell testing fixture integrates all the necessary components into one unit, making the testing process easier to operate, saving time and effort, improving testing efficiency and convenience, and also meeting the needs of large-scale battery testing.

[0030] Preferably, such as Figures 1 to 4As shown, in this embodiment, to ensure the clamping stability of the battery under test, the positioning part 1 and the testing part 2 are connected by an elastic component 6. To prevent the elastic component 6 from interfering with the placement of the battery under test, the elastic component 6 is disposed at the end of the positioning part 1 and the end of the testing part 2. The elastic component 6 can connect the positioning plate 101 and the testing plate 201, and can restrict the position of the positioning plate 101 and the testing plate 201, thereby clamping the battery under test located in the testing space 3.

[0031] Preferably, such as Figure 2 and Figure 4 As shown, in this embodiment, the elastic component 6 may include a first clamping plate 601 disposed at the end of the positioning part 1, a second clamping plate 602 disposed at the end of the testing part 2, and an elastic member 603 connecting the first clamping plate 601 and the second clamping plate 602. For ease of installation, both the first clamping plate 601 and the second clamping plate 602 may be formed as cuboid plates; however, this is not a limitation. Since the elastic component 6 is disposed at the ends of the positioning part 1 and the testing part 2, the shapes of the first clamping plate 601 and the second clamping plate 602 can also be adjusted accordingly based on the shapes of the positioning part 1 and the testing part 2, for example, as circular or square plates.

[0032] like Figure 4 As shown, with the battery under test (not shown) housed in the test space 3, the positioning part 1 and the test part 2 clamp the battery under test together via the elastic component 6. In this state, the operator can perform IV testing.

[0033] Furthermore, such as Figure 2 As shown, in this embodiment, both the first clamping plate 601 and the second clamping plate 602 have through holes for the elastic member 603 to pass through. Two fixing plates 604 are also provided at both ends of the elastic member 603. During assembly, the two ends of the elastic member 603 are first passed through the through holes of the first clamping plate 601 and the second clamping plate 602, respectively, and then the fixing plates 604 are glued or snapped onto the first clamping plate 601 and the second clamping plate 602. Gluing can be done, for example, using adhesive, and snapping can be achieved through the engagement of a slot and a locking block. In this embodiment, the elastic member 603 can be a spring.

[0034] Preferably, such as Figures 1 to 4 As shown in the embodiment, in order to ensure the clamping stability of the battery under test and to ensure that both ends of the battery under test are subjected to uniform force, elastic components 6 are provided at both opposite ends of the positioning part 1. In the embodiment, there are two elastic components 6, which are arranged opposite to each other.

[0035] Preferably, such as Figures 1 to 4As shown, in this embodiment, the positioning part 1 may include a positioning plate 101 and a positioning post 102. The positioning post 102 is disposed on the periphery of the positioning plate 101. When the battery under test is placed in the test space 3, the battery under test can abut against the positioning post 102. The positioning plate 101 is used to support the battery under test. When the battery under test is in contact with the positioning plate 101, the edge of the battery under test can abut against the positioning post 102 to prevent the battery under test from falling out of the positioning plate 101.

[0036] Preferably, such as Figures 1 to 4 As shown, in this embodiment, the positioning post 102 is fixedly connected to the outer periphery of the positioning plate 101, and the fixed connection can be, for example, by bonding or welding.

[0037] Preferably, in this embodiment, the positioning post 102 is slidably disposed on the outer periphery of the positioning plate 101. A groove is provided on the outer periphery of the positioning plate 101 for mounting the positioning post 102. Two facing sidewalls of the groove are provided with protruding sliders. A slide rail is provided on the outer surface of the sidewall of the positioning post 102 facing the groove where the sliders are located. One end of the slide rail is closed, and the other end is open, to achieve a sliding connection between the slider and the slide rail and to prevent the slider from dislodging from the slide rail. In use, the positioning post 102 can be slid first to avoid interference with the outer wall of the positioning plate 101 when the battery under test is inserted. After the battery under test is installed, the positioning post 102 can be slid back to its original position to prevent the battery under test from dislodging.

[0038] Preferably, such as Figure 2 and Figure 3 As shown in the embodiment, since the types and specifications of the batteries under test are diverse in IV testing, and the positive and negative terminals of each battery under test are set differently, in order to enable the testing of multiple batteries under test in one testing fixture, the contact component 4 that contacts the positive and negative terminals needs to be set in an adjustable position on the positioning plate 101. In this way, when the battery under test is being tested, the operator only needs to adjust the setting position of the contact component 4 to complete the conductive connection of the battery under test.

[0039] Preferably, such as Figure 2 and Figure 3 As shown, in this embodiment, the contact assembly 4 may include contact grooves 401 and contact elements 402. The positioning plate 101 has two opposing contact grooves 401, and the two ends of the contact elements 402 are respectively disposed in the two opposing contact grooves 401. The two opposing contact grooves 401 can respectively correspond to the positive and negative terminals of the battery under test. Furthermore, to achieve conductive connection between the positive and negative terminals, the number of contact elements 402 is also two. Figure 3As shown, since the contact groove 401 is a through groove, the contact member 402 can be formed into a ring structure and wrapped around the two opposite contact grooves 401. The two contact members 402 are respectively disposed at both ends of the contact groove 401 along the length direction.

[0040] Preferably, in this embodiment, the contact 402 can be, for example, a copper foil. Copper has excellent conductivity, enabling excellent conductive connections and ensuring good contact with the positive and negative electrodes of the battery under test. Conductive cotton can be wrapped around the copper foil, which can reduce friction between the positive and negative electrodes of the battery under test and the copper foil, thus minimizing damage.

[0041] Preferably, such as Figure 2 and Figure 3 As shown, in this embodiment, the contact 402 slides in such a way that it is slidably disposed along the length of the contact groove 401. In this embodiment, the contact groove 401 can be formed as an oblong groove, which facilitates the sliding of the contact 402 to adjust the contact position for adapting to different specifications of the battery under test.

[0042] Preferably, such as Figures 1 to 4 As shown, in this embodiment, the positioning plate 101 can be formed as a cuboid plate, and there are multiple positioning posts 102, which are vertically positioned at the four outer edges of the cuboid plate. Since in the vertical direction (the vertical direction can be understood as...) Figure 4 In the vertical direction, the battery under test is constrained by the test plate 201 at the top and the positioning plate 101 at the bottom, and will not move. Correspondingly, in the horizontal direction (the horizontal direction can be understood as...), the battery under test is constrained by the test plate 201 at the top and the positioning plate 101 at the bottom, and will not move. Figure 4 (In the left and right directions) a limiting component, namely a positioning post 102, needs to be set. Since the cuboid plate has four outer edges in the horizontal direction, positioning posts 102 are set on each of the four outer edges for limiting in order to ensure the reliability of clamping. The positioning posts 102 can also prevent the battery from tilting when placed, and can ensure the parallel alignment of the electrodes and the contact 402.

[0043] Preferably, such as Figure 2 and Figure 5 As shown, the positioning plate 101 may include four positioning posts 102 and two positioning posts 102. For example... Figure 2 As shown, four positioning posts 102 are disposed along the four outer edges of the positioning plate 101, which is formed as a cuboid plate. The positioning plate 101 with four positioning posts 102 can more firmly hold the battery under test; as Figure 5 As shown, two positioning posts 102 are disposed on two adjacent outer sides of the positioning plate 101, which is formed as a cuboid plate. The positioning plate 101 is provided with two positioning posts 102 to facilitate the placement of the battery to be tested, while avoiding interference during placement.

[0044] Preferably, such as Figures 1 to 4 As shown, in this embodiment, the measuring hole 5 is a square hole with a side length of 1 cm. The shape and specifications of the measuring hole 5 can be adjusted accordingly according to the testing needs. In this embodiment, the battery under test is tested for a light-illuminated area of ​​one square centimeter.

[0045] The solar cell testing fixture is used as follows: A 2.5cm x 2.5cm solar cell (the specification of the cell under test in this embodiment; different specifications can be selected according to specific circumstances) is directly inserted into the fixture, specifically into the testing space 3 between the positioning part 1 and the testing part 2. The positive and negative terminals of the cell under test face the contact assembly 4. Then, the position of the contact 402 is adjusted along the length of the contact groove 401 so that the two contact 402 correspond to the positive and negative terminals of the cell under test, respectively. External wires are connected to the contact 402 to complete the installation of the cell under test. This solar cell testing fixture allows for convenient installation of the cell under test before testing. Compared to traditional testing methods, it simplifies the operation steps, reduces the number of parts required, and eliminates the need for highly skilled personnel to install the cell under test, saving time and effort.

[0046] This solar cell testing fixture integrates multiple test components from the original testing process into a positioning section and a testing section. Through the cooperation of the positioning and testing sections, IV testing of the cell under test can be performed. The testing space provided by the positioning section is used to accommodate and position the cell under test, while the testing section clamps the cell under test and performs IV testing using the provided measurement holes. This solar cell testing fixture integrates all the necessary components into one unit, making the testing process easier to operate, saving time and effort, improving testing efficiency and convenience, and also meeting the needs of large-scale cell testing.

[0047] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A testing fixture for solar cells, characterized in that, The test fixture for solar cells includes a positioning part (1) and a testing part (2). The positioning part (1) is provided with a contact component (4); The test section (2) is provided with a measuring hole (5) that penetrates through the thickness direction perpendicular to the test section (2). The positioning part (1) is disposed opposite to the testing part (2), and a testing space (3) is formed between the positioning part (1) and the testing part (2). The testing space (3) is used to accommodate the battery to be tested. The contact component (4) is used to make electrical contact with the positive and negative electrodes of the battery under test in the test space (3); Test light is shone onto the battery under test through the measurement hole (5).

2. The testing fixture for solar cells according to claim 1, characterized in that, The positioning part and the testing part are connected by an elastic component (6), which is disposed at the end of the positioning part (1) and the end of the testing part (2).

3. The test fixture for solar cells according to claim 2, characterized in that, The elastic component (6) includes a first clamping plate (601) disposed at the end of the positioning part (1), a second clamping plate (602) disposed at the end of the testing part (2), and an elastic member (603) connecting the first clamping plate (601) and the second clamping plate (602).

4. The test fixture for solar cells according to claim 3, characterized in that, The elastic component (6) is provided at both opposite ends of the positioning part (1).

5. The testing fixture for solar cells according to claim 1, characterized in that, The positioning part (1) includes a positioning plate (101) and a positioning post (102). The positioning post (102) is disposed on the periphery of the positioning plate (101). When the battery under test is disposed in the test space (3), the battery under test can abut against the positioning post (102) to achieve positioning.

6. The test fixture for solar cells according to claim 5, characterized in that, The contact component (4) is disposed in an adjustable position on the positioning plate (101).

7. The test fixture for solar cells according to claim 6, characterized in that, The contact assembly (4) includes a contact groove (401) and a contact element (402). The positioning plate (101) has two opposing contact grooves (401), and the two ends of the contact element (402) are respectively disposed in the two opposing contact grooves (401).

8. The test fixture for solar cells according to claim 7, characterized in that, The contact element (402) is slidably disposed along the length direction of the contact groove (401).

9. The test fixture for solar cells according to claim 5, characterized in that, The positioning plate (101) is formed as a cuboid plate, and there are multiple positioning posts (102), which are arranged vertically on the outer side of the cuboid plate.

10. The test fixture for solar cells according to claim 1, characterized in that, The measuring hole (5) is a square hole with a side length of 1 cm.

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