CN216451340U

CN216451340U - Test tool

Info

Publication number: CN216451340U
Application number: CN202120856991.9U
Authority: CN
Inventors: 袁尧年; 李�远; 潘高源; 吴小建
Original assignee: Jiaxing Longi Solar Technology Co Ltd
Current assignee: Jiaxing Longi Solar Technology Co Ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2022-05-06
Anticipated expiration: 2031-04-23

Abstract

The embodiment of the utility model discloses a test tool, which relates to the technical field of solar cells and comprises a tool body and a bearing rod; the tool body comprises a shell, a first terminal and a second terminal, the bearing rod is connected with the shell, and a first connector and a second connector are arranged on the bearing rod; the first connector is electrically connected with the first terminal, the second connector is electrically connected with the second terminal, and the first connector and the second connector are used for being electrically connected with a junction box of the photovoltaic module. In the power test process of the photovoltaic assembly, the bearing rod plays a role in fixing and containing the first connector and the second connector, the first connector and the second connector are directly connected with the junction box of the photovoltaic assembly, the electric connection of the test tool and the photovoltaic assembly can be realized, a plurality of connectors and adapters are not needed to be used for circuit connection between the test tool and the photovoltaic assembly, the accuracy of the power test of the photovoltaic assembly is improved, and the risk of the hidden crack of the photovoltaic assembly in the test process is reduced.

Description

Test tool

Technical Field

The utility model relates to the technical field of solar cells, in particular to a test tool.

Background

At present, with the gradual perfection of the photovoltaic industry, the quality requirement of the photovoltaic module is higher and higher. In the production process of the photovoltaic module, power testing is an important link and directly relates to the quality control of the photovoltaic module.

The existing photovoltaic module power test usually adopts a four-wire system test tool, in the test process, the connection between a junction box of the photovoltaic module and the test tool needs to be realized through a plurality of connectors and adapters, and more wires exist on the connectors and the adapters.

When the test tool is adopted, more connectors and adapters appear at the back of the photovoltaic assembly, the connectors and the adapters droop under the action of dead weight, the connectors and the adapters exceed the frame of the assembly, the connectors and the adapters are scratched by a production line body in the transmission process of the photovoltaic assembly, the electric connection between the test tool and the photovoltaic assembly is easily broken, the power test of the photovoltaic assembly is abnormal, and the collision between the connectors and the adapters also easily causes the hidden crack of a product.

SUMMERY OF THE UTILITY MODEL

The utility model provides a test tool, and aims to solve the problems that a connector, an adapter and a pipeline body are scratched in the process of testing a photovoltaic module, so that the power test of the photovoltaic module is abnormal and the risk of hidden cracking of a product exists.

The utility model discloses a test tool, which is used for testing the power of a photovoltaic module, and comprises: the tool comprises a tool body and a bearing rod;

the tool body comprises a first terminal, a second terminal and a shell, the shell is provided with the first terminal and the second terminal, and the first terminal and the second terminal are used for being electrically connected with a power tester;

the bearing rod is connected with the shell, and a first connector and a second connector are arranged on the bearing rod;

the first connector is electrically connected with the first terminal, the second connector is electrically connected with the second terminal, and the first connector and the second connector are used for being electrically connected with a junction box of the photovoltaic assembly.

Optionally, the test fixture further includes: a first lead group and a second lead group;

the first connector is electrically connected with the first terminal through the first lead group, and the first lead group is arranged along the axial direction of the bearing rod;

the second connector and the second terminal are electrically connected through the second wire group, and the second wire group is partially arranged along the axial direction of the bearing rod.

Optionally, the carrier bar is a hollow bar;

the first lead group is arranged in the bearing rod in a penetrating way;

the second wire group part penetrates through the bearing rod.

Optionally, the carrier bar is a solid bar;

the first lead group is fixed on the outer surface of the bearing rod;

the second wire group part is fixed on the outer surface of the bearing rod.

Optionally, a through hole is formed in the carrier bar, and the extending direction of the through hole is perpendicular to the axial direction of the carrier bar;

the second wire group is partially arranged in the bearing rod in a penetrating way through the through hole.

Optionally, a first mounting groove and a second mounting groove are arranged along the axial direction of the bearing rod;

the first connector is connected with the first mounting groove in a sliding mode, and the second connector is connected with the second mounting groove in a sliding mode.

Optionally, the first connector comprises a first connector body and a first contact, the first contact is electrically connected with the first connector body, and the first contact is used for electrically connecting with a junction box of the photovoltaic assembly;

the second connector comprises a second connector body and a second contact, the second contact is electrically connected with the second connector body, and the second contact is used for being electrically connected with the junction box of the photovoltaic assembly.

Optionally, the first connector body is provided with a first threaded hole, and the first threaded hole is used for fixing the first wire group;

the second connector body is provided with a second threaded hole, and the second threaded hole is used for fixing the second wire group.

Optionally, the carrier bar is detachably connected to the housing.

Optionally, the cross section of the carrier bar is circular or polygonal along a direction perpendicular to the axis of the carrier bar.

Optionally, a clamping portion is arranged on the shell and used for being clamped with the frame of the photovoltaic assembly.

In the embodiment of the utility model, the test tool comprises: the tool comprises a tool body and a bearing rod; the tool body comprises a first terminal, a second terminal and a shell, the shell is provided with the first terminal and the second terminal, and the first terminal and the second terminal are used for being electrically connected with the power tester; the bearing rod is connected with the shell, and a first connector and a second connector are arranged on the bearing rod; the first connector is electrically connected with the first terminal, the second connector is electrically connected with the second terminal, and the first connector and the second connector are used for being electrically connected with a junction box of the photovoltaic module. In the process of testing the power of the photovoltaic assembly, the bearing rod is arranged on the tool body, the first connector and the second connector are arranged on the bearing rod, the bearing rod plays a role in fixing and containing the first connector and the second connector, the first connector and the second connector are directly connected with the junction box of the photovoltaic assembly, the electric connection of the testing tool and the photovoltaic assembly can be realized, circuit connection is not needed to be carried out between the testing tool and the photovoltaic assembly through a plurality of connectors and adapters, the situation that the connectors and the adapters droop under the action of gravity and scratch off with a flow line body to cause abnormal power testing of the photovoltaic assembly and the problem that the photovoltaic assembly collides with the connectors and the adapters is avoided, the accuracy of the power testing of the photovoltaic assembly is improved, and the risk of hidden cracking of the photovoltaic assembly in the testing process is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic diagram illustrating an explosive structure of a test fixture in an embodiment of the utility model;

FIG. 2 shows one of the assembling structural diagrams of the test fixture in the embodiment of the utility model;

fig. 3 shows a schematic view of a first connector according to an embodiment of the utility model;

FIG. 4 is a second schematic view of an assembly structure of a test fixture in an embodiment of the present invention;

fig. 5 is a third schematic view illustrating an assembly structure of a test tool in an embodiment of the present invention;

fig. 6 shows a schematic structural diagram of fig. 5 along a direction in an embodiment of the present invention.

Description of the reference numerals

10-a tool body; 20-a carrier bar; 30-a first wire set; 40-a second wire set; 50-a photovoltaic module; 101-a housing; 102-a first terminal; 103-a second terminal; 104-a clamping part; 201-a first connector; 202-a second connector; 203-a via hole; 204-a first mounting groove; 205-a second mounting groove; 2011-first connector body; 2012-a first threaded hole; 2013-a first contact; 2021-a second connector body; 2022-a second threaded hole; 2023-second contact.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, an embodiment of the present invention discloses a test tool, which is used for testing power of a photovoltaic module 50, and the test tool includes: the tool comprises a tool body 10 and a bearing rod 20; the tool body 10 comprises a first terminal 102, a second terminal 103 and a shell 101, wherein the shell 101 is provided with the first terminal 102 and the second terminal 103, and the first terminal 102 and the second terminal 103 are used for being electrically connected with a power tester; the bearing rod 20 is connected with the shell 101, and a first connector 201 and a second connector 202 are arranged on the bearing rod 20; the first connector 201 is electrically connected to the first terminal 102, the second connector 202 is electrically connected to the second terminal 103, and the first connector 201 and the second connector 202 are used for electrically connecting to a junction box of the photovoltaic module 50.

Specifically, when the power of the photovoltaic module 50 is detected, assembly line operation is usually performed, and specifically, the power detection system may include a conveying device, a testing tool, a power detector, and the like, where the conveying device is used to convey the photovoltaic module 50 to a station of the testing tool, so as to electrically connect the testing tool and the photovoltaic module 50; the test tool is further electrically connected with the power detector, and after the test tool is electrically connected with the photovoltaic module 50, the power detector can detect the power of the photovoltaic module 50.

When the power of the photovoltaic module 50 is detected, a four-wire system testing method is adopted, compared with a traditional two-wire system testing method, the four-wire system testing method can reduce the influence of the change of the contact resistance between the testing tool and the photovoltaic module 50 on the power of the photovoltaic module 50, and improves the accuracy of the power test of the photovoltaic module 50.

In the embodiment of the utility model, the test tool comprises a tool body 10 and a bearing rod 20, wherein the tool body 10 comprises a first terminal 102, a second terminal 103 and a shell 101, and the shell 101 is provided with the first terminal 102 and the second terminal 103. The first terminal 102 and the second terminal 103 may be disposed inside the housing 101 or disposed on the upper surface of the housing 101, which is not limited in the embodiment of the present invention. The first terminal 102 and the second terminal 103 are used for conducting a test circuit between the power detector and the photovoltaic module 50, and need to be made of a material with good conductivity, for example, the first terminal 102 and the second terminal 103 may be made of copper or silver.

One end of the carrier bar 20 is connected to the housing 101, and specifically, the carrier bar 20 may be made of plastic or glass, and preferably, the carrier bar 20 may be made of polyvinyl chloride, which has the advantages of low cost, light weight, stable chemical properties, etc. A first connector 201 and a second connector 202 are arranged on the carrying rod 20, the first connector 201 is electrically connected with the first terminal 102, the first connector 201 is used for electrically connecting with a junction box of the photovoltaic module 50, the second connector 202 is electrically connected with the second terminal 103, and the second connector 202 is used for electrically connecting with the junction box of the photovoltaic module 50; therefore, the first connector 201 and the second connector 202 can be used for conducting a circuit from the tool body 10 to the junction box of the photovoltaic assembly 50, and further conducting of a test circuit between the power detector and the test tool and the photovoltaic assembly 50 is achieved. In fig. 1, 2, 4 and 5, for clarity, the internal structure of the carrier bar 20 is illustrated, and the longer carrier bar 20 is illustrated as a broken and segmented structure. It will be appreciated that in practice, the carrier rod 20 may be a complete shaft-like component. When the load bearing rod 20 is long and inconvenient to transport and assemble, the load bearing rod 20 can also be designed into a multi-segment sectional type rod, and when the test tool is in a use state after being assembled, the multi-segment sectional type rod is still connected into a whole.

In the embodiment of the utility model, in the process of testing the power of the photovoltaic module 50, by arranging the bearing rod 20 on the tool body 10, and a first connector 201 and a second connector 202 are arranged on the carrier bar 20, the carrier bar 20 plays a role of fixedly receiving the first connector 201 and the second connector 202, the first connector 201 and the second connector 202 are directly interconnected with a junction box of the photovoltaic module 50, the electric connection between the test tool and the photovoltaic component 50 can be realized, a plurality of connectors and adapters are not needed to be used for circuit connection between the test tool and the photovoltaic component 50, the phenomenon that the connectors and the adapters sag under the action of gravity and are scratched by a flow line body to cause abnormal power test of the photovoltaic component 50 is avoided, and the problem of collision between the photovoltaic module 50 and the connector and the adapter is solved, so that the accuracy of power test of the photovoltaic module 50 is improved, and the risk of hidden crack of the photovoltaic module 50 in the test process is reduced.

Optionally, referring to fig. 1 and 2, the test fixture further includes: a first wire set 30 and a second wire set 40; the first connector 201 and the first terminal 102 are electrically connected through the first wire group 30, and the first wire group 30 is arranged along the axial direction of the carrier bar 20; the second connector 202 and the second terminal 103 are electrically connected by the second wire group 40, and the second wire group 40 is partially arranged along the axial direction of the carrier bar 20.

Specifically, the first connector 201 is electrically connected to the first terminal 102 through the first wire group 30, and the connection manner of the first wire group 30, the first terminal 102 and the first connector 201 may be welding or conductive adhesive bonding; the second connector 202 and the second terminal 103 are electrically connected through the second wire group 40, and the connection manner of the second wire group 40, the second terminal 103 and the second connector 202 may be soldering or conductive adhesive bonding.

When the carrier bar 20 is connected to the housing 101, preferably, a connection structure may be provided at a position of the first terminal 102 on the housing 101, through which the carrier bar 20 is connected to the housing 101, and at the same time, the first wire group 30 electrically connected to the first terminal 102 may be directly arranged along the axial direction of the carrier bar 20; the second wire group 40 can be divided into a fixed section and a connection section, the fixed section is also arranged along the axial direction of the carrier bar 20, and since the second terminal 103 and the first terminal 102 are located at different positions, and a certain distance exists between the second terminal 103 and the carrier bar 20, the fixed section and the second terminal 103 can be connected through the connection section. When the first and

second wire groups

30 and 40 are arranged along the axial direction of the carrier bar 20, a fixing structure may be disposed at a distance from each other on the wire groups to ensure stability when the first and

second wire groups

30 and 40 are arranged along the axial direction of the carrier bar 20.

Through laying first wire group 30 along the axis direction of

carrier bar

20, 40 parts of second wire group are laid along the axis direction of carrier bar 20, can guarantee the fixed of wire group position, and at the 50 power test processes of photovoltaic module, wire group can not be flagging because of self gravity, has avoided wire group and flow line body to scratch, has promoted the accuracy of the 50 power test of photovoltaic module.

Alternatively, as shown in fig. 1 and 2, the carrier bar 20 is a hollow bar; the first wire group 30 is arranged in the bearing rod 20 in a penetrating way; the second wire group 40 is partially inserted into the carrying rod 20.

Specifically, as an embodiment, the carrier bar 20 may be a hollow bar, an accommodating space is provided inside the carrier bar 20, and the first wire group 30 may be directly inserted into the accommodating space inside the carrier bar 20; the fixed segment of the second wire set 40 is also inserted into the receiving space in the support rod 20. Through adopting hollow rod, can accomodate the accommodation space in carrier bar 20 with wire group, avoided wire group and flow line body to scratch, promoted the accuracy of 50 power test of photovoltaic module.

Optionally, the carrier rod 20 is a solid rod; the first wire group 30 is fixed on the outer surface of the bearing rod 20; the second wire set 40 is partially secured to the outer surface of the carrier bar 20.

Specifically, as another embodiment, the carrier bar 20 may be a solid bar, and the first wire group 30 may be fixed to the outer surface of the carrier bar 20; the fixed segment of the second wire set 40 is also fixed to the outer surface of the carrier bar 20. The first wire group 30 and the second wire group 40 may be fixed to the outer surface of the carrier bar 20 by bonding, snap-fitting, or the like. Through adopting solid pole, can guarantee carrier bar 20's structural strength, avoid carrier bar 20 to buckle because the action of gravity produces, simultaneously, can also play the fixed action to wire group, avoid wire group and flowline body to scratch, promoted the accuracy of the 50 power test of photovoltaic module.

Optionally, referring to fig. 1 and fig. 2, a through hole 203 is provided on the carrier rod 20, and an extending direction of the through hole 203 is perpendicular to an axial direction of the carrier rod 20; the second wire group 40 is partially inserted into the bearing rod 20 through the through hole 203.

Specifically, the second wire group 40 is divided into a fixing section and a connecting section, the fixing section is arranged in an accommodating space in the bearing rod 20 in a penetrating manner, in order to ensure reliable connection between the connecting section and the second terminal 103 as well as between the connecting section and the fixing section, a through hole 203 is formed in the bearing rod 20 at a position close to the housing 101, the through hole 203 communicates with the inside and the outside space of the bearing rod 20, and the connecting section can pass through the through hole 203 to realize electric connection between the second terminal 103 and the fixing section.

Optionally, referring to fig. 1 and 2, a first mounting groove 204 and a second mounting groove 205 are arranged along the axial direction of the carrier bar 20; the first connector 201 is slidably connected to the first mounting groove 204, and the second connector 202 is slidably connected to the second mounting groove 205.

Specifically, the first mounting groove 204 and the second mounting groove 205 are disposed along the axial direction of the carrier bar 20, a predetermined distance is provided between the first mounting groove 204 and the second mounting groove 205, when the first connector 201 and the second connector 202 are respectively mounted in the first mounting groove 204 and the second mounting groove 205, the first connector 201 can slide in the first mounting groove 204 along the axial direction of the carrier bar 20, and the second connector 202 can slide in the second mounting groove 205 along the axial direction of the carrier bar 20, wherein the sliding range is determined by the size of the mounting grooves. Meanwhile, when the first wire group 30 and the second wire group 40 are connected with the first connector 201 and the second connector 202, the length of the wire group is reserved, the length of the wire group can support the first connector 201 and the second connector 202 to slide in the mounting groove, and the problem that the contact between the wire group and the connectors is unstable due to the sliding of the connectors is avoided. The opening depth of the first mounting groove 204 and the second mounting groove 205 should be less than half of the diameter of the load bar 20 to ensure that the load bar 20 has sufficient structural strength to support its own weight without deformation.

In the photovoltaic module 50 of different specifications, the position of terminal box also respectively differs, through setting up first mounting groove 204 and second mounting groove 205, first connector 201 can slide along the axis direction of carrier bar 20 in first mounting groove 204, second connector 202 can slide along the axis direction of carrier bar 20 in second mounting groove 205, can adjust the position of first connector 201 and second connector 202, can carry out better adaptation with the terminal box of the photovoltaic module 50 of different specifications, the commonality of test fixture has been promoted.

Referring to fig. 2, for the power test of the photovoltaic modules 50 with the same specification, because the positions of the junction boxes are the same, and the positions of the first connector 201 and the second connector 202 do not need to be adjusted, the test tool structure shown in fig. 2 can be adopted, and by adopting the structure, because the mounting groove does not need to be formed in a large area on the carrier bar 20, the structural strength of the carrier bar 20 can be ensured, and the carrier bar 20 is prevented from being bent due to the action of gravity.

Optionally, as shown in fig. 1 and 4, the first connector 201 includes a first connector body 2011 and first contacts 2013, the first contacts 2013 are electrically connected to the first connector body 2011, and the first contacts 2013 are used for electrically connecting to a junction box of the photovoltaic module 50; the second connector 202 includes a second connector body 2021 and a second contact 2023, the second contact 2023 is electrically connected to the second connector body 2021, and the second contact 2023 is used for electrically connecting to the junction box of the pv module 50.

Specifically, the first connector 201 includes a first connector body 2011 and first contacts 2013, and the second connector 202 includes a second connector body 2021 and second contacts 2023, and the first contacts 2013 and the second contacts 2023 are used for electrically connecting with the junction box of the photovoltaic module 50. The first contact 2013 and the second contact 2023 may be cylindrical in shape and perpendicular to the first connector body 2011 and the second connector body 2021, respectively. Through setting up the contact structure, when the connector carries out the electricity with photovoltaic module 50's terminal box and is connected, can guarantee the stability and the accuracy of contact.

The number of the first contacts 2013 may be 1 or 2, and the number of the second contacts 2023 may also be 1 or 2, which may be selected according to the actual specification of the junction box of the photovoltaic module 50, and the embodiment of the present invention does not limit this.

Optionally, referring to fig. 1 to 5, the first connector body 2011 is provided with a first threaded hole 2012, and the first threaded hole 2012 is used for fixing the first wire group 30; the second connector body 2021 is provided with a second threaded hole 2022, and the second threaded hole 2022 is used for fixing the second wire group 40.

Specifically, the first connector 201 is electrically connected to the first wire group 30, and the second connector 202 is electrically connected to the second wire group 40, and the specific electrical connection method may be as follows: a first threaded hole 2012 is formed in the first connector body 2011, and the first wire group 30 can be inserted into the first threaded hole 2012 and is in threaded fit with the first threaded hole 2012 to realize fixation; the second connector body 2021 is provided with a second threaded hole 2022, and the second wire group 40 can be inserted into the second threaded hole 2022 and fixed by being in threaded fit with the second threaded hole 2022. The first lead group 30 and the second lead group 40 are fixed in a threaded matching mode, so that the installation is simple and convenient, and the disassembly and the maintenance are convenient.

Optionally, the carrying rod 20 is detachably connected to the housing 101.

Specifically, the carrier bar 20 is detachably connected to the housing 101, and the detachable connection mode includes: a through hole 203 is formed in the shell 101, internal threads are arranged in the through hole 203, external threads are arranged on the bearing rod 20, and the bearing rod 20 is connected with the shell 101 through threads; or, a clamping groove is formed in the casing 101, a clamping portion 104 is correspondingly formed in the bearing rod 20, and the bearing rod 20 is clamped with the casing 101. Through the mode of can dismantling the connection, be convenient for install and maintenance, reduced the installation cost and the cost of maintenance of test fixture.

Optionally, the cross section of the carrier rod 20 is circular or polygonal along the direction perpendicular to the axis of the carrier rod 20.

Specifically, the cross section of the carrier bar 20 is circular or polygonal along a direction perpendicular to the axis of the carrier bar 20. For example, the carrier bar 20 with a circular cross section can be adopted, so that the assembly between the carrier bar 20 and the shell 101 is facilitated, the distribution of force in all directions of the circular shape is uniform, and the risk of collision and damage of the photovoltaic module 50 is reduced when the carrier bar is in contact with the photovoltaic module 50; or, the bearing rod 20 with a polygonal cross section can be adopted, the corresponding shell 101 is provided with a polygonal mounting hole with a corresponding shape, the bearing rod 20 and the mounting hole are installed in a matched mode, and due to the limiting clamping effect of each edge of the polygon, the bearing rod 20 and the mounting hole cannot rotate relatively due to external force, so that stable connection of internal components of the bearing rod 20 is guaranteed.

Optionally, as shown in fig. 4 and fig. 5, a clamping portion 104 is disposed on the housing 101, and the clamping portion 104 is used for clamping with a frame of the photovoltaic module 50.

Specifically, in order to realize the assembly of the test fixture and the photovoltaic module 50, a clamping portion 104 is arranged on the casing 101, and the clamping portion 104 is used for being clamped with a frame on one side of the photovoltaic module 50. Meanwhile, one end, far away from the shell 101, of the bearing rod 20 can extend into a frame on the other side of the photovoltaic assembly 50, the total length of the bearing rod 20 is within the range of 900mm-1500mm, and the extension length in the frame of the bearing rod 20 is 10mm-30mm, so that two ends of the test tool are in contact with the frame of the photovoltaic assembly 50, the frame of the photovoltaic assembly 50 can support the test tool, and the test tool is prevented from deforming due to self gravity.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides a test fixture for test photovoltaic module's power, its characterized in that, test fixture includes: the tool comprises a tool body and a bearing rod;

2. The test tool of claim 1, further comprising: a first lead group and a second lead group;

3. The test fixture of claim 2, wherein the carrier bar is a hollow bar;

the first lead group is arranged in the bearing rod in a penetrating way;

the second wire group part penetrates through the bearing rod.

4. The test tool of claim 2, wherein the carrier bar is a solid bar;

the first lead group is fixed on the outer surface of the bearing rod;

the second wire group part is fixed on the outer surface of the bearing rod.

5. The test tool according to claim 3, wherein the bearing rod is provided with a through hole, and the extending direction of the through hole is perpendicular to the axial direction of the bearing rod;

6. The test tool according to claim 1, wherein a first mounting groove and a second mounting groove are formed in the axial direction of the bearing rod;

7. The test tool according to claim 2, wherein the first connector comprises a first connector body and a first contact, the first contact is electrically connected with the first connector body, and the first contact is used for being electrically connected with a junction box of the photovoltaic module;

8. The test tool according to claim 7, wherein the first connector body is provided with a first threaded hole for fixing the first wire group;

9. The test tool of claim 1, wherein the carrier bar is removably connected to the housing.

10. The test tool of claim 1, wherein the cross section of the carrier bar is circular or polygonal along a direction perpendicular to the axis of the carrier bar.

11. The test tool according to claim 1, wherein a clamping portion is arranged on the shell and used for being clamped with a frame of the photovoltaic module.