Clamp and testing device

Abstract

The utility model relates to the technical field of photovoltaic cell testing, and provides a clamp and a testing device.The provided clamp is used for being matched with a source meter to test a photovoltaic cell, the clamp comprises a placing assembly and an electric connection assembly, the placing assembly is provided with a placing position for placing the photovoltaic cell, and the electric connection assembly is arranged on the placing assembly; the electric connection assembly is provided with a terminal used for being electrically connected with the source meter and is used for being in contact with the photovoltaic cell to achieve electric conduction, so that the photovoltaic cell placed at the placing position can be electrically connected with the source meter through the electric connection assembly. According to the scheme, the problem that in the prior art, the testing efficiency of testing multiple photovoltaic cells through a source table is low can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing of photovoltaic cells, in particular to a clamp and a testing device. BACKGROUND

[0002] The prior art usually tests the current-voltage characteristics of photovoltaic cells (such as perovskite photovoltaic cells) under different light conditions by using a source measure unit (SMU), draws an I-V curve, obtains open-circuit voltage (Voc), short-circuit current (Isc) and other parameters therefrom, evaluates the performance and efficiency of the photovoltaic cells through the parameters, and ensures the reliability and effectiveness of the photovoltaic cells in actual application.

[0003] However, in the prior art, the source measure unit and the photovoltaic cell are connected one by one for testing. When multiple photovoltaic cells need to be tested, the photovoltaic cells are electrically connected to the source measure unit in a four-wire or two-wire manner, the connection wires are removed after the test is completed, the next photovoltaic cell is connected to the source measure unit in a four-wire or two-wire manner, and the next photovoltaic cell is tested. This testing method requires constant wiring and unwiring, and the testing efficiency is low. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a clamp and a testing device to solve the problem of low testing efficiency of multiple photovoltaic cells by using a source measure unit in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A clamp is used to test photovoltaic cells in cooperation with a source measure unit, and the clamp comprises:

[0007] A placing assembly is provided with a placing position for placing the photovoltaic cell;

[0008] An electrical connection assembly is provided on the placing assembly and has a terminal for electrically connecting the source measure unit, and the electrical connection assembly is used to contact and conduct electricity with the photovoltaic cell, so that the photovoltaic cell placed in the placing position can be electrically connected to the source measure unit through the electrical connection assembly.

[0009] Optionally, the electrical connection assembly comprises a circuit board and a plurality of electrical connection pieces, the electrical connection pieces are provided in the placing position and used to contact and conduct electricity with the photovoltaic cell, the circuit board has the terminal, and the plurality of electrical connection pieces are electrically connected to the circuit board;

[0010] The number of the placement positions is multiple, and the placement positions are arranged one by one corresponding to the electrical connectors, the circuit board is used for controlling the multiple electrical connectors and the terminal to be cyclically conducted multiple times, in each cycle, the circuit board is used for controlling each of the multiple electrical connectors to be conducted with the terminal in turn, so that the photovoltaic cells placed in the multiple placement positions can be conducted with the source table in turn.

[0011] Optionally, the placement assembly comprises a main body, and the placement positions comprise placement slots formed in the main body.

[0012] Optionally, the placement assembly further comprises a cover body, the cover body is detachably connected with the main body, the cover body is provided with a light-transmitting area, and the light-transmitting area is arranged opposite to the placement slots.

[0013] In the case that the photovoltaic cells are placed in the placement slots and the cover body is connected with the main body, the cover body applies a pressure to the photovoltaic cells in a direction close to the electrical connection assembly.

[0014] Optionally, a protruding part is arranged on a surface of the cover body facing the main body, the protruding part is arranged one by one corresponding to the placement slots, and the protruding part is used for abutting on the photovoltaic cells in the case that the photovoltaic cells are placed in the placement slots and the cover body is connected with the main body.

[0015] Optionally, the light-transmitting area comprises a light-transmitting hole.

[0016] Optionally, the electrical connectors comprise a plurality of first probes and a plurality of second probes, the plurality of first probes are used for connecting an anode of the photovoltaic cell, and the plurality of second probes are used for connecting a cathode of the photovoltaic cell.

[0017] Optionally, the number of the circuit boards is one; or the number of the circuit boards is multiple, each of the circuit boards is electrically connected with part of the electrical connectors, and the multiple circuit boards are used for one by one corresponding to connect the multiple source tables.

[0018] Optionally, the circuit board is detachably connected to the placement assembly through a fastener, a head of the fastener protrudes from the circuit board in a direction away from the placement assembly, the head of the fastener is used for being supported on a table top of a test bench, and the head of the fastener is used for making a gap between the circuit board and the table top of the test bench.

[0019] A test device comprises a source table and the clamp in any one of the above, and the source table is electrically connected with the terminal.

[0020] In the embodiment of the present application, in the case of source table and terminal connection, the photovoltaic cell is placed in the placement position to realize the electrical connection between the photovoltaic cell and the source table, and the photovoltaic cell is taken away from the placement position to disconnect the electrical connection between the photovoltaic cell and the source table, so that when the clamp in the embodiment of the present application is used to cooperate with the source table to test a plurality of photovoltaic cells, it is not necessary to repeatedly connect and disconnect the wires of the photovoltaic cells to be tested and the source table, thereby improving the test efficiency of the source table in testing a plurality of photovoltaic cells. As can be seen, using the clamp in the embodiment of the present application to cooperate with the source table to test a plurality of photovoltaic cells can solve the problem of low test efficiency of the source table in testing a plurality of photovoltaic cells in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0022] Fig. 1 An exploded view of the clamp and the photovoltaic cell provided in the embodiment of the present application;

[0023] Fig. 2 A structural schematic view of the clamp provided in the embodiment of the present application with one photovoltaic cell placed therein;

[0024] Fig. 3 A structural schematic view of the photovoltaic cell provided in the embodiment of the present application.

[0025] In Figs. 1-3 , the clamp is used to cooperate with the source table to test a plurality of photovoltaic cells, and the photovoltaic cell is placed in the placement position to realize the electrical connection between the photovoltaic cell and the source table, and the photovoltaic cell is taken away from the placement position to disconnect the electrical connection between the photovoltaic cell and the source table, so that when the clamp in the embodiment of the present application is used to cooperate with the source table to test a plurality of photovoltaic cells, it is not necessary to repeatedly connect and disconnect the wires of the photovoltaic cells to be tested and the source table, thereby improving the test efficiency of the source table in testing a plurality of photovoltaic cells. As can be seen, using the clamp in the embodiment of the present application to cooperate with the source table to test a plurality of photovoltaic cells can solve the problem of low test efficiency of the source table in testing a plurality of photovoltaic cells in the prior art.

[0026] 100, placement assembly; 110, main body; 111, placement groove; 120, cover body; 121, light transmission area;

[0027] 200, electrical connection assembly; 210, circuit board; 220, electrical connecting piece; 221, first probe; 222, second probe;

[0028] 300, photovoltaic cell; 310, positive electrode; 320, negative electrode. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] A source table is a kind of measuring instrument combining the functions of a voltage source, a current source, a voltmeter, an ammeter and an electronic load, and is widely used in the measurement of various types of precision instruments.

[0031] As shown in Figs. 1 to 3 The embodiments of the present application provide a clamp for cooperating with a source table to test a photovoltaic cell 300 (for example, a perovskite photovoltaic cell), so as to obtain the current-voltage characteristics of the photovoltaic cell 300 under different illumination conditions, draw an I-V curve, obtain parameters such as open-circuit voltage (Voc) and short-circuit current (Isc) from the I-V curve, and evaluate the performance and efficiency of the photovoltaic cell 300 through the parameters, so as to ensure the reliability and effectiveness of the photovoltaic cell 300 in actual application.

[0032] The clamp comprises a placing assembly 100 and an electrical connection assembly 200, wherein the placing assembly 100 is provided with a placing position for placing the photovoltaic cell 300, and the electrical connection assembly 200 is arranged on the placing assembly 100, the electrical connection assembly 200 has a terminal for electrically connecting the source table, the terminal can be connected with the source table through a four-wire method or a two-wire method, so as to realize the electrical connection between the electrical connection assembly 200 and the source table, and the electrical connection assembly 200 is also used to contact the photovoltaic cell 300 to realize conduction, so that the photovoltaic cell 300 placed in the placing position can be electrically connected with the source table through the electrical connection assembly 200.

[0033] In the embodiments of the present application, when the source table and the terminal are connected, the photovoltaic cell 300 can be placed in the placing position to realize the electrical connection between the photovoltaic cell 300 and the source table, and the photovoltaic cell 300 can be taken away from the placing position to disconnect the electrical connection between the photovoltaic cell 300 and the source table, so that when the clamp in the embodiments of the present application is used to cooperate with the source table to test a plurality of photovoltaic cells 300, it is not necessary to repeatedly connect and disconnect the photovoltaic cells 300 to be tested and the source table, and the test efficiency of the source table in testing a plurality of photovoltaic cells 300 is improved. Therefore, using the clamp in the embodiments of the present application to cooperate with the source table to test a plurality of photovoltaic cells 300 can solve the problem of low test efficiency of the source table in testing a plurality of photovoltaic cells 300 in the prior art.

[0034] The number of placing positions can be one or more.

[0035] In the case that the number of the placement positions is one, when testing the plurality of photovoltaic cells 300, the first photovoltaic cell 300 is placed in the placement position, the first photovoltaic cell 300 is electrically connected with the source table through the electrical connection assembly 200, the first photovoltaic cell 300 is tested, after the first photovoltaic cell 300 is tested, the first photovoltaic cell 300 is removed, the second photovoltaic cell 300 is placed in the placement position, the second photovoltaic cell 300 is tested, and the testing of the plurality of photovoltaic cells 300 is completed in turn. During the testing process, the photovoltaic cell 300 to be tested and the source table do not need to be connected and disconnected repeatedly, and the testing efficiency of the plurality of photovoltaic cells 300 is improved.

[0036] In the case that the number of the placement positions is one, the photovoltaic cell 300 and the source table can be connected through the electrical connector 220 and the cable. For example, the electrical connector 220 can include a first probe 221 and a second probe 222. The first probe 221 can be in contact with the positive electrode 310 of the photovoltaic cell 300, and the second probe 222 can be in contact with the negative electrode 320 of the photovoltaic cell 300. The first probe 221 and the second probe 222 are connected with the source table through the cable to realize the electrical connection between the photovoltaic cell 300 and the source table.

[0037] In the case that the number of the placement positions is multiple, the clamp can place multiple photovoltaic cells 300 at the same time, and the same source table can be used to test the plurality of photovoltaic cells 300 in turn.

[0038] Specifically, the electrical connection assembly 200 can include a plurality of electrical connectors 220 and a circuit board 210. The electrical connectors 220 are installed in the placement positions and used to contact and conduct electricity with the photovoltaic cells 300. The circuit board 210 has two terminals for connecting the source table through the four-wire method or the two-wire method. The plurality of electrical connectors 220 are electrically connected with the circuit board 210, and the plurality of placement positions and the plurality of electrical connectors 220 are one-to-one correspondingly arranged.

[0039] The circuit board 210 is used to control each of the plurality of electrical connectors 220 to conduct electricity with the terminals in turn, so that the photovoltaic cells 300 placed in the plurality of placement positions conduct electricity with the source table in turn. That is, when one of the electrical connectors 220 is in the circuit with the terminals, the other electrical connectors 220 are disconnected from the circuit with the terminals. When the source table is connected, only one photovoltaic cell 300 can conduct electricity with the source table at a time.

[0040] In this case, the placement assembly 100 can place multiple photovoltaic cells 300 at the same time, and the circuit board 210 can automatically switch the circuit to enable the source table to test the plurality of photovoltaic cells 300 in turn. During the testing of the plurality of photovoltaic cells 300, the photovoltaic cells 300 do not need to be taken out, and the testing efficiency of the plurality of photovoltaic cells 300 is further improved.

[0041] The electrical connectors 220 can include a plurality of first probes 221 and a plurality of second probes 222, all the first probes 221 and all the second probes 222 are electrically connected to the circuit board 210, the plurality of first probes 221 are used to contact the positive poles 310 of the photovoltaic cells 300, the plurality of second probes 222 are used to contact the negative poles 320 of the photovoltaic cells 300, the plurality of first probes 221 can be distributed in one row, and the plurality of second probes 222 can be distributed in another row. The placement sites can be provided with mounting holes, and the first probes 221 and the second probes 222 partially extend into the mounting holes and can be clamped in the mounting holes by clamping or can be bonded in the mounting holes by adhesive, so as to arrange the first probes 221 and the second probes 222 in the placement sites.

[0042] After the photovoltaic cells 300 are placed in the placement slots 111, the positive poles 310 and the negative poles 320 of the photovoltaic cells 300 contact the first probes 221 and the second probes 222 in the rows respectively, and the number of the first probes 221 and the second probes 222 is multiple, which ensures that the positive poles 310 and the negative poles 320 of the photovoltaic cells 300 can effectively contact the first probes 221 and the second probes 222, and guarantees the effective electrical connection between the photovoltaic cells 300 and the circuit board 210.

[0043] Of course, in other optional embodiments, the electrical connectors 220 can be planar electrodes or other electrical connectors.

[0044] The photovoltaic cells 300 need to be preheated during the test process, and the optimal I-V curve can be obtained after the photovoltaic cells 300 are preheated, and the evaluation result of the photovoltaic cells 300 is more accurate through the optimal I-V curve.

[0045] Therefore, in the embodiments of the present application, the circuit board 210 can also be used to control the multiple cycles of the electrical connectors 220 and the terminals, and in each cycle, each electrical connector 220 in the electrical connectors 220 is connected to the terminals in turn, so as to perform multiple cycle tests on the photovoltaic cells 300.

[0046] In the specific test, the plurality of photovoltaic cells 300 are placed in the plurality of placement positions one by one, the light source is started (the light source can be consistent), the circuit board 210 controls the first photovoltaic cell 300 to be first connected with the source table (the other photovoltaic cells 300 are not connected with the source table), the voltage of the source table is changed, the current of the first photovoltaic cell 300 is tested, and the first I-V curve of the first photovoltaic cell 300 is drawn (the step of testing the I-V curve of the photovoltaic cell 300 by using the source table after the source table and the photovoltaic cell 300 are electrically connected is prior art, and details are not repeated here), the circuit board 210 automatically controls the switching circuit to make the second photovoltaic cell 300 connected with the source table (the other photovoltaic cells 300 are not connected with the source table), the first I-V curve of the second photovoltaic cell 300 is drawn, the above steps are repeated to test all the photovoltaic cells 300, the first I-V curve of all the photovoltaic cells 300 is drawn, and the first cycle test is completed; the circuit board 210 automatically controls the switching circuit to make the first photovoltaic cell 300 connected with the source table again (the other photovoltaic cells 300 are not connected with the source table), the second I-V curve of the first photovoltaic cell 300 is drawn, the process of the first cycle test is repeated, the second cycle test is completed, and the second I-V curve of all the photovoltaic cells 300 is drawn. After multiple cycle tests, each photovoltaic cell 300 can obtain multiple groups of data, draw multiple I-V curves, and take the optimal I-V curve to evaluate the photovoltaic cell 300.

[0047] The structure can not only improve the test efficiency of the plurality of photovoltaic cells 300, but also fully utilize the idle time of the source table, thereby improving the test efficiency.

[0048] It should be noted that the two tests of the same photovoltaic cell 300 can be separated by 2 minutes, of course, the time interval between the two tests of the same photovoltaic cell 300 can be adjusted according to specific requirements, and the present application does not limit this.

[0049] It should be noted that the circuit board 210 realizes the circuit switching control, the technology of realizing that each electrical connector 220 in the whole electrical connector 220 is connected with the terminal in turn, and the technology of realizing that the whole electrical connector 220 is connected with the terminal in multiple cycles are all prior art, and details are not repeated here.

[0050] In the embodiment of the present application, the placement assembly 100 can include a main body 110, the placement position can be a placement slot 111 opened on the main body 110, and the circuit board 210 can be stacked with the main body 110 and detachably connected by a fastener (such as a screw). In this structure, the photovoltaic cell 300 is placed in the placement slot 111, and the placement slot 111 can limit the photovoltaic cell 300 to improve the position accuracy of each photovoltaic cell 300 and ensure the smooth progress of the test process.

[0051] Of course, in other alternative embodiments, the placement position can also be a certain region on the main body 110 (for example, the region where the first probe 221 and the second probe 222 are located).

[0052] In a further technical solution, the placement assembly 100 can further include a cover 120, which is detachably connected with the main body 110. For example, the cover 120 and the main body 110 can be detachably connected through a threaded connection or a clamping connection, etc. The cover 120 is provided with a light-transmitting region 121, which is oppositely arranged with the placement groove 111, so that the light source can irradiate onto the photovoltaic cell 300.

[0053] In the case where the photovoltaic cell 300 is placed in the placement groove 111 and the cover 120 is connected with the main body 110, the cover 120 exerts a pressure on the photovoltaic cell 300 in the direction of the electrical connection assembly 200, so as to ensure the effective contact between the photovoltaic cell 300 and the electrical connection assembly 200, thereby ensuring the effective electrical connection between the photovoltaic cell 300 and the electrical connection assembly 200. In the above-mentioned embodiments, the electrical connection member 220 is used to contact the photovoltaic cell 300 to realize electrical conduction. Therefore, in the case where the photovoltaic cell 300 is placed in the placement groove 111 and the cover 120 is connected with the main body 110, the cover 120 exerts a pressure on the photovoltaic cell 300 in the direction of the electrical connection member 220, so as to ensure the effective contact between the photovoltaic cell 300 and the electrical connection member 220, thereby ensuring the effective electrical connection between the photovoltaic cell 300 and the electrical connection member 220.

[0054] Optionally, the surface of the cover 120 facing the main body 110 can be a planar structure. In the case where the photovoltaic cell 300 is placed in the placement groove 111 and the cover 120 is connected with the main body 110, the surface of the cover 120 facing the main body 110 abuts on all the photovoltaic cells 300, and exerts a pressure on all the photovoltaic cells 300 in the direction of the electrical connection member 220.

[0055] Optionally, the surface of the cover 120 facing the main body 110 can be provided with protrusions, which can be arranged one-to-one with the placement grooves 111. The protrusions are used to abut on the photovoltaic cells 300 in the case where the photovoltaic cells 300 are placed in the placement grooves 111 and the cover 120 is connected with the main body 110, so as to exert a pressure on the photovoltaic cells 300 in the direction of the electrical connection member 220.

[0056] In the above-mentioned solution, the cover 120 has the light-transmitting region 121. In an alternative embodiment, the cover 120 can be integrally made of a light-transmitting material, or the region of the cover 120 opposite to the placement groove 111 can be made of a light-transmitting material.

[0057] In another alternative embodiment, the light-transmissive region 121 can be a light-transmissive hole.

[0058] In the embodiments of the present application, the number of the circuit boards 210 can be one or more, for example, two (the drawings of the specification of the present application are all shown by taking the fixture including two circuit boards 210 as an example), each circuit board 210 is electrically connected to the partial electrical connecting member 220, and the plurality of circuit boards 210 are used to one-to-one correspondingly connect a plurality of source tables.

[0059] The circuit board 210 can be detachably connected to the placing assembly 100 by a fastener (for example, a screw), for example, detachably stacked and mounted on the surface of the main body 110 which is away from the cover 120, the head of the fastener protrudes from the circuit board 210 in the direction away from the placing assembly 100, and the head of the fastener is used to be supported on the tabletop of the test bench, so that the fastener can not only play a connecting role, but also play a supporting role. During the test process, the fixture is placed on the tabletop of the test bench, and the fastener can make the circuit board 210 have a certain gap with the tabletop, which is helpful for heat dissipation of the circuit board 210.

[0060] Based on the above-described fixture, the embodiments of the present application further provide a test device, which includes the source table and the above-described fixture, and the source table is electrically connected to the terminal of the electrical connecting assembly 200. Since the test device has the above-described fixture, the beneficial effects of the test device brought by the fixture are described above, and will not be described here.

[0061] The basic principles of the present application are described above in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the present application are only examples and are not limited, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the present application. In addition, the above-mentioned specific details are only for the purpose of example and for the purpose of understanding, and are not limited to the above-mentioned specific details, and the present application must be realized by using the above-mentioned specific details.

[0062] The block diagrams of the devices, apparatuses, equipment, systems involved in the present application are only illustrative examples and are not intended to require or imply that the connection, arrangement and configuration shown in the block diagram must be used. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged and configured in any way. Words such as "include", "contain", "have" and the like are open-ended words, which mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0063] It should also be noted that in the apparatuses, devices and methods of the present application, the components and steps can be rearranged and / or equally divided, wherein these rearrangements and / or divisions shall be construed to be equivalent to the present application.

[0064] The above description of disclosed aspects is intended to enable any person skilled in the art to make or use the application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0065] It should be understood that the adjectives "first", "second", "third", "fourth", "fifth" and "sixth" used in the embodiments description of the present application are only used for more clearly describing the technical solutions, and cannot be used to limit the protection scope of the present application.

[0066] The above description has been presented for the purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the forms disclosed herein. Although several example aspects and embodiments have been discussed above, those of ordinary skill in the art will appreciate a variety of modifications, alternatives, permutations, additions, and sub-combinations, which fall within the scope of the application.

Claims

1. A clamp characterized in that, A testing device for testing a photovoltaic cell (300) by using a source table, the testing device comprising: a placing assembly (100) configured to place the photovoltaic cell (300); an electrical connecting assembly (200) disposed on the placing assembly (100) and configured to electrically connect the source table, the electrical connecting assembly (200) configured to contact the photovoltaic cell (300) to realize electrical conduction, so that the photovoltaic cell (300) placed on the placing assembly (100) can be electrically connected to the source table through the electrical connecting assembly (200); the electrical connecting assembly (200) comprises a circuit board (210) and a plurality of electrical connecting members (220), the electrical connecting members (220) are disposed on the placing assembly (100) and configured to contact the photovoltaic cell (300) to realize electrical conduction, the circuit board (210) is provided with the terminals, and the plurality of electrical connecting members (220) are electrically connected to the circuit board (210); the placing assembly (100) comprises a main body (110), and the placing slots (111) are formed in the main body (110).

2. The clamp of claim 1, wherein the placing assembly (100) further comprises a cover (120), the cover (120) is detachably connected to the main body (110), the cover (120) is provided with a light-transmitting area (121), and the light-transmitting area (121) is opposite to the placing slots (111); 3. The clamp of claim 2, wherein when the photovoltaic cell (300) is placed in the placing slots (111) and the cover (120) is connected to the main body (110), the cover (120) applies a pressure to the photovoltaic cell (300) in a direction close to the electrical connecting assembly (200). a surface of the cover (120) facing the main body (110) is provided with a protruding part, the protruding part is opposite to the placing slots (111), and the protruding part is configured to abut against the photovoltaic cell (300) when the photovoltaic cell (300) is placed in the placing slots (111) and the cover (120) is connected to the main body (110).

4. The clamp of claim 3, wherein the light-transmitting area (121) comprises a light-transmitting hole.

5. The clamp of claim 3, wherein the electrical connecting members (220) comprise a plurality of first probes (221) and a plurality of second probes (222), the plurality of first probes (221) are configured to connect an anode (310) of the photovoltaic cell (300), and the plurality of second probes (222) are configured to connect a cathode (320) of the photovoltaic cell (300).

6. The clamp of claim 1, wherein ​ 7. The clamp of claim 1, wherein The number of the circuit boards (210) is one; or the number of the circuit boards (210) is multiple, each of the circuit boards (210) is electrically connected with part of the plurality of electric connectors (220), and the plurality of circuit boards (210) are used for one-to-one corresponding connection with the plurality of source tables.

8. The clamp of claim 1, wherein The circuit board (210) is detachably connected to the placing assembly (100) through a fastener, and a head of the fastener protrudes from the circuit board (210) in a direction away from the placing assembly (100), the head of the fastener is used for supporting on a table top of a test bench, and is used for making the circuit board (210) have a gap with the table top of the test bench.

9. A test device, characterized by A clamp as claimed in any one of claims 1-8, comprising a source table electrically connected to the terminals.

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