CN214174590U

CN214174590U - Detection device

Info

Publication number: CN214174590U
Application number: CN202023220561.2U
Authority: CN
Inventors: 李硕; 杨慧; 邓伟伟; 蒋方丹
Original assignee: CSI Cells Co Ltd; Atlas Sunshine Power Group Co Ltd
Current assignee: Canadian Solar Inc; CSI Cells Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-09-10
Anticipated expiration: 2030-12-28

Abstract

The utility model discloses a detection device relates to check out test set technical field. The detection device is used for detecting the edge electric leakage condition of the solar cell and comprises a base, a detection mechanism and an ohmmeter. The base is used for supporting the solar cell; the detection mechanism is arranged on the base and comprises a fixing piece and a plurality of groups of first detection assemblies arranged on the fixing piece, the plurality of groups of first detection assemblies are arranged along a first direction, each group of first detection assemblies comprises two first probes arranged at intervals along the first direction, and the first probes can be abutted against one side edge of the solar cell; the ohmmeter includes a plurality of detection channels, each of which is electrically connected to two of the first probes in a set of the first detection assemblies. The detection mechanism can enable the distance between the two electrodes to be accurate, the test range to be comprehensive and the electric leakage condition of the whole edge to be evaluated.

Description

Detection device

Technical Field

The utility model relates to a check out test set technical field especially relates to a detection device.

Background

Solar energy is increasingly paid more attention to people as a renewable, safe and environment-friendly new energy source. On the other hand, solar energy, if directly used, can only be used as a heat source. And the solar cell can convert solar energy into electric energy, thereby being applied to various fields and being convenient for transmission. In a commercially produced solar cell, a PN junction is usually formed by diffusion, and the edge of a silicon wafer inevitably undergoes wraparound plating during diffusion to form a highly doped conductive layer, which needs to be removed in a subsequent etching process, otherwise, the PN junction of a diffusion surface is short-circuited, and the edge of the cell leaks electricity.

In the production line monitoring, in order to test whether a diffusion layer with a periphery being plated around is completely removed, a common method is to put two electrodes of an ohmmeter on the side of a silicon wafer at a certain distance and test an ohm value between the two electrodes. When the ohm value is very small, the short circuit exists, namely the edge diffusion layer is not removed completely, and the produced battery has leakage behavior. And manually placing the electrodes of the ohmmeter, the distance between the two electrodes is not accurate enough, so that the test difference before and after the same position is large. And only a small distance can be tested each time, the test range is not comprehensive, and the electric leakage condition of the whole edge cannot be evaluated.

In view of the above problems, it is necessary to develop a detection device to solve the problems that the distance between two electrodes is not accurate enough, the test range is not comprehensive, and the leakage condition of the whole edge cannot be evaluated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a detection device can make between two electrodes apart from accurate, the test range comprehensive and the electric leakage condition on aassessment whole limit.

To achieve the purpose, the utility model adopts the following technical proposal:

a detection apparatus for detecting an edge leakage condition of a solar cell, comprising:

the base is used for supporting the solar cell;

the detection mechanism is arranged on the base and comprises a fixing piece and a plurality of groups of first detection assemblies arranged on the fixing piece, the plurality of groups of first detection assemblies are arranged along a first direction, each group of first detection assemblies comprises two first probes arranged at intervals along the first direction, and the first probes can be abutted against one side edge of the solar cell;

an ohmmeter including a plurality of detection channels, each of the detection channels being electrically connected to two of the first probes in a set of the first detection assemblies.

Preferably, one of the first probes of the first detection assembly is in insulating abutment with one of the first probes of the first detection assembly adjacent thereto.

Preferably, the detection mechanism further comprises:

the first driving assembly can drive the fixing piece to slide along a second direction to be close to or far away from the solar cell piece, and the second direction is perpendicular to the first direction;

the second driving assembly is arranged on the base and can drive the first driving assembly to slide along the first direction.

Preferably, the first probe includes a body and an abutting member that is capable of extending and contracting with respect to the body, and the body and the abutting member are connected by an elastic member.

Preferably, the detection mechanism further comprises a second detection assembly, the second detection assembly comprises two second probes, a corner of the solar cell is provided with a chamfer, the two second probes abut against two ends of the chamfer, and the two second probes are electrically connected with the same detection channel of the ohmmeter.

Preferably, the base comprises a platform and a support member arranged on the platform, the support member is used for bearing the solar cell, and a retaining wall is arranged on the support member and can be abutted against the side edge of the solar cell.

Preferably, the solar cell module further comprises a positioning assembly, the positioning assembly comprises at least two oppositely arranged positioning blocks, at least two of the positioning blocks can slide relative to the base to be close to or away from each other, and the positioning blocks can abut against the solar cell so as to push the solar cell to a detection position.

Preferably, the solar cell module further comprises a pressing component, and the pressing component can press the solar cell on the base.

Preferably, the base is provided with a vacuum suction hole, and a lower opening of the vacuum suction hole is connected to a vacuum pump.

Preferably, the upper surface of the base is further provided with at least one vacuum guide groove, and the bottom surface of each vacuum guide groove is provided with the vacuum suction hole.

The utility model has the advantages that:

the utility model provides a detection device. In the detection device, the plurality of first probes are abutted to one side edge to be detected of the solar cell, and each detection channel of the ohmmeter is electrically connected with the two first probes of the group of first detection assemblies to detect the resistance between the two first probes. If the resistances between the two first probes of all the first detection assemblies are equal, the side does not have the leakage condition. If the resistance between the two first probes of a certain first detection assembly is obviously smaller than the resistance between the two first probes of other first detection assemblies, it indicates that the resistance is reduced due to the short circuit between the two first probes of the first detection assembly, and then the edge of the solar cell has an electric leakage condition. The distance between two first probes in the first detection component of every group of this detection device is fixed, and the reading is accurate, and detection error is little, can once only detect a side moreover, and the test is comprehensive, reduces the time cost.

Drawings

Fig. 1 is a schematic structural diagram of a detection device provided by the present invention;

fig. 2 is a schematic structural diagram of a first driving assembly and a second driving assembly provided by the present invention;

FIG. 3 is a schematic view of a vacuum hole on a base according to the present invention;

fig. 4 is a schematic structural view of the vacuum suction hole and the vacuum guide groove on the base according to the present invention.

X, a first direction; y, a second direction;

100. a solar cell sheet;

1. a base; 2. a detection mechanism;

11. a platform; 12. a support member; 13. vacuum suction holes; 14. a vacuum guide groove; 21. a fixing member; 22. a first detection assembly; 23. a first drive assembly; 24. a second drive assembly; 25. a second detection assembly;

121. retaining walls; 221. a first probe; 231. a first driving member; 232. a first adjusting screw; 241. a second driving member; 242. a second adjusting screw; 251. a second probe;

2211. a body; 2212. an abutment member.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The embodiment provides a detection device for detecting the edge leakage condition of the solar cell 100. As shown in fig. 1, the detection device includes a base 1, a detection mechanism 2, and an ohmmeter. The base 1 is used for supporting the solar cell piece 100, the detection mechanism 2 is arranged on the base 1 and comprises a fixing member 21 and a plurality of groups of first detection assemblies 22 arranged on the fixing member 21, the plurality of groups of first detection assemblies 22 are arranged along a first direction, each group of first detection assemblies 22 comprises two first probes 221 arranged along the first direction at intervals, and each first probe 221 can abut against one side edge of the solar cell piece 100. The ohmmeter includes a plurality of detection channels, each of which is electrically connected to two first probes 221 in a set of first detection assemblies 22.

Each detection channel of the ohmmeter can detect the resistance between two first probes 221 in a group of first detection assemblies 22, and a side of the solar cell 100 is subjected to multipoint detection through the multiple detection channels of the ohmmeter, and since the distances between the two first probes 221 in each first detection assembly 22 are equal, if the side of the solar cell 100 is not electrified, the resistance detected by each detection channel of the ohmmeter should be equal; if a short circuit occurs at a certain position of the side edge of the solar cell 100, the resistance value between the two first probes 221 of the measuring assembly at this position is significantly smaller than the resistance value between the two first probes 221 of the other measuring assemblies, and an operator can determine whether the side edge of the solar cell 100 has an electric leakage condition and an electric leakage position according to the reading of the ohmmeter. The distance between two first probes 221 in each group of first detection assemblies 22 of the detection device is fixed, the reading is accurate, the detection error is small, one side can be detected at one time, the test is comprehensive, and the time cost is reduced.

To enable a more detailed measurement without leaking any point on the side edge, one first probe 221 of a first detecting member 22 is in insulating abutment with one first probe 221 of a first detecting member 22 adjacent thereto. That is, the first probes 221 close to each other in the adjacent first detecting elements 22 are in insulation contact with each other, so that there is no gap between the detecting sections of the plurality of first detecting elements 22, and the entire side edge of the solar cell 100 can be detected.

Preferably, the detection device further includes a first driving assembly 23 and a second driving assembly 24, the first driving assembly 23 can drive the fixing member 21 to slide along a second direction to get close to or get away from the solar cell 100, and the second direction is perpendicular to the first direction. Wherein, the first direction and the second direction are both parallel to the surface of the base 1 for bearing the solar cell 100.

The second driving assembly 24 is disposed on the base 1, and the second driving assembly 24 can drive the first driving assembly 23 to slide along the first direction. The second driving assembly 24 can control the abutting positions of the first detecting assemblies 22 and the solar cell 100, and the first driving assembly 23 controls the first probes 221 of the first detecting assemblies 22 to abut against the side edges of the solar cell 100, so that the first probes 221 abut against the side edges of the solar cell 100 at the same time, and the solar cell is stable, not easy to shake and accurate in reading.

As shown in fig. 2, the first driving assembly 23 includes a first driving member 231 and a first adjusting screw 232, and the second driving assembly 24 includes a second driving member 241 and a second adjusting screw 242. The second adjusting screw 242 is rotatably disposed on the base 1 and cannot move axially relative to the base 1, and the second driving member 241 is slidably disposed on the base 1 along the first direction and is threadedly connected to the second adjusting screw 242. The first adjusting screw 232 is rotatably disposed on the second driving member 241 and cannot move along its own axial direction, and the first driving member 231 is slidably disposed on the second driving member 241 along the second direction and is in threaded connection with the first adjusting screw 232. The fixing member 21 is disposed on the first driving member 231.

An operator rotates the second adjusting screw 242, and then controls the second driving member 241 to drive the first driving member 231 to move along the first direction, and further controls the fixing member 21 to move along the first direction, so that the first probe 221 abuts against a proper position on the side of the solar cell 100. Then, the first adjusting screw 232 is rotated to control the fixing member 21 to approach or depart from the supporting member 12, when the first driving assembly 23 controls the fixing member 21 to approach the supporting member 12, the plurality of first probes 221 will abut against the side of the solar cell 100, and the first adjusting screw 232 is rotated continuously to make the first probes 221 abut against the side of the solar cell 100.

In order to prevent the side edge of the solar cell 100 from being damaged by the first probe 221 due to the continuous rotation of the first adjusting screw 232, the first probe 221 includes a main body 2211 and an abutting piece 2212 capable of extending and contracting relative to the main body 2211, and the main body 2211 and the abutting piece 2212 are connected by an elastic piece. The elasticity of the elastic member can make the abutting member 2212 abut against the side edge of the solar cell 100, and provide a buffer for the driving force of the first driving assembly 23. Meanwhile, the problem that part of the first probes 221 cannot contact with the side edge when the side edge of the solar cell 100 is not straight is avoided.

The elastic element can be a spring or an elastic block made of polyurethane.

The corner of the solar cell 100 is provided with a corner cut, in order to detect whether the corner cut leaks electricity, the detection mechanism 2 further includes a second detection assembly 25, the second detection assembly 25 includes two second probes 251, the two second probes 251 are abutted to two ends of the corner cut, and the two second probes 251 are electrically connected with the same detection channel of the ohmmeter.

Since the solar cell 100 is a standard component, the detection range of the plurality of first detection assemblies 22 in this embodiment is one full side length of the solar cell 100, that is, the first probe 221 outside the first detection assembly 22 at the outermost edge abuts against one end of the cut angle, so to simplify the structure, one of the two second probes 251 is disposed on the fixing component 21 and is in insulating abutment with the outermost first probe 221 for abutting against one end of the cut angle.

In order to adjust the abutting position of the other second probe 251, the detecting mechanism 2 further includes a third driving component, a fourth driving component and a mounting component, it can be understood that the third driving component and the fourth driving component are disposed on the adjacent edge of the side abutting against the first probe 221, the other second probe 251 is disposed on the mounting component, and the third driving component and the fourth driving component have the same structure as the first driving component 23 and the second driving component 24, and can drive the mounting component to drive the other second probe 251 to move along the first direction and the second direction, so as to control the other second probe 251 to move to accurately abut against one end of the corner cut.

Preferably, the base 1 includes a platform 11 and a support 12 disposed on the platform 11, the support 12 is used for carrying the solar cell 100, and a retaining wall 121 is disposed on the support 12, and the retaining wall 121 can abut against a side edge of the solar cell 100. The retaining wall 121 is provided to prevent the solar cell 100 from sliding when the first probe 221 and the second probe 251 abut against the side of the solar cell 100, which may cause poor contact and affect the detection result. In order to avoid the interference of the blocking wall 121 on the first probe 221 and the second probe 251, the blocking wall 121 is not disposed in the contact region between the first probe 221 and the second probe 251 and the solar cell 100.

Since the retaining wall 121 is fixed, in order to facilitate the taking and placing of the solar cell 100, a certain gap needs to be left between the retaining wall 121 and the sidewall of the solar cell 100. In order to improve the position accuracy of the solar cell 100, the detection device may be provided with a positioning assembly instead of the retaining wall 121, and the positioning assembly includes at least two positioning blocks disposed oppositely, and the at least two positioning blocks can slide relative to the base 1 to approach or separate from each other, and abut against the solar cell 100 when approaching, so as to push the solar cell 100 to the detection position.

At least two positioning blocks are L-shaped, and respectively abut against two corners of the solar cell piece 100 away from the first probe 221 and adjacent edges of the corners in the process of approaching each other, so that the position of the solar cell piece 100 is ensured not to be deviated, and the solar cell piece 100 can be prevented from being pushed by the first probe 221.

Preferably, the detection device further comprises a pressing component, and the pressing component can press the solar cell 100 on the base 1. The pressing assembly can prevent the solar cell piece 100 from shaking in the detection process, and the accuracy of the detection result is guaranteed. The compressing assembly comprises a lifting driving piece and a buffer piece, the lifting driving piece can drive the buffer piece to abut against the upper surface of the solar cell piece 100, and the buffer piece can prevent the solar cell piece 100 from being crushed.

Preferably, the lifting driving member can be a linear motor or a screw nut structure driven by a rotating motor, and the buffer member can be a cushion supported by polyurethane.

As shown in fig. 3, in order to better protect the solar cell 100, the base 1 is provided with at least one vacuum suction hole 13, and a lower opening of the vacuum suction hole 13 is connected to a vacuum pump. The solar cell 100 is adsorbed to the surface of the base 1 through the vacuum adsorption holes 13, so that the solar cell 100 can be fixed and the solar cell 100 can be prevented from being damaged. Preferably, the vacuum suction holes 13 on the base 1 are provided in plurality and uniformly distributed on the surface of the base 1.

As shown in fig. 4, the upper surface of the base 1 may further be provided with at least one vacuum guide groove 14, and the bottom of each vacuum guide groove 14 is provided with at least one vacuum suction hole 13. The vacuum guide grooves 14 improve not only point adsorption but also line adsorption when the solar cell 100 is vacuum-adsorbed, so that the attaching pressure of the solar cell 100 and the base 1 is more uniform, and the effective contact area is larger.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A detection device for detecting edge leakage of a solar cell (100), comprising:

a base (1) for supporting the solar cell sheet (100);

the detection mechanism (2) is arranged on the base (1) and comprises a fixing piece (21) and a plurality of groups of first detection assemblies (22) arranged on the fixing piece (21), the plurality of groups of first detection assemblies (22) are arranged along a first direction, each group of first detection assemblies (22) comprises two first probes (221) arranged at intervals along the first direction, and the first probes (221) can be abutted to one side edge of the solar cell (100);

an ohmmeter comprising a plurality of detection channels, each of said detection channels being electrically connected to two of said first probes (221) in a set of said first detection assemblies (22).

2. The device according to claim 1, characterized in that one of said first probes (221) of said first detecting assembly (22) is in insulating abutment with one of said first probes (221) of said first detecting assembly (22) adjacent thereto.

3. The detection device according to claim 1, characterized in that the detection mechanism (2) further comprises:

the first driving assembly (23) can drive the fixing piece (21) to slide to be close to or far away from the solar cell piece (100) along a second direction, and the second direction is perpendicular to the first direction;

the second driving assembly (24) is arranged on the base (1), and the second driving assembly (24) can drive the first driving assembly (23) to slide along the first direction.

4. The detecting device according to claim 1, wherein the first probe (221) comprises a main body (2211) and an abutting piece (2212) capable of extending and contracting relative to the main body (2211), and the main body (2211) and the abutting piece (2212) are connected through an elastic piece.

5. The detection device according to claim 1, wherein the detection mechanism (2) further comprises a second detection assembly (25), the second detection assembly (25) comprises two second probes (251), a corner of the solar cell (100) is provided with a chamfer, the two second probes (251) abut against two ends of the chamfer, and the two second probes (251) are electrically connected with the same detection channel of the ohmmeter.

6. The detection device according to claim 1, wherein the base (1) comprises a platform (11) and a support (12) arranged on the platform (11), the support (12) is used for bearing the solar cell (100), and a retaining wall (121) is arranged on the support (12), and the retaining wall (121) can abut against the side edge of the solar cell (100).

7. The detection device according to claim 1, further comprising a positioning assembly, wherein the positioning assembly comprises at least two oppositely disposed positioning blocks, at least two of the positioning blocks are slidable relative to the base (1) to move toward or away from each other, and the positioning blocks can abut against the solar cell sheet (100) to push the solar cell sheet (100) to a detection position.

8. The detection device according to claim 1, further comprising a pressing assembly capable of pressing the solar cell sheet (100) against the base (1).

9. The detection device according to claim 1, wherein the base (1) is provided with a vacuum suction hole (13), and a lower opening of the vacuum suction hole (13) is connected to a vacuum pump.

10. The detection device according to claim 9, wherein the upper surface of the base (1) is further provided with at least one vacuum guide groove (14), and the bottom surface of each vacuum guide groove (14) is provided with the vacuum suction hole (13).