CN217213055U

CN217213055U - Solar cell testing device

Info

Publication number: CN217213055U
Application number: CN202123057646.8U
Authority: CN
Inventors: 李杏兵; 杨黎飞; 杨青松; 张闻斌
Original assignee: Gongqingcheng Huanguang Investment Partnership LP; Suzhou Guanghui New Energy Technology Co ltd
Current assignee: Gongqingcheng Huanguang Investment Partnership LP; Suzhou Guanghui New Energy Technology Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-08-16
Anticipated expiration: 2031-12-07

Abstract

The utility model discloses a solar cell testing arrangement. The solar cell testing device includes: probe row and main bars layering, the probe row includes a plurality of probes that set up along the appointed orientation interval in proper order, the main bars layering can with a plurality of probe electric connection, just the main bars layering can also cover in succession establishes at least one main bars of the battery that awaits measuring to with the main bars electric connection who establishes by the cover. The utility model provides a solar cell testing arrangement, simple structure, easy to use makes the contact stability of probe and battery owner bars improve through the owner bars layering, further promotes test data's stability.

Description

Solar cell testing device

Technical Field

The utility model relates to a battery testing arrangement, in particular to solar cell testing arrangement belongs to solar cell technical field.

Background

A solar cell is a photoelectric semiconductor sheet directly generating electricity by using sunlight, which is also called a solar chip or a photovoltaic cell, and can output voltage instantly and generate current under the condition of a loop as long as the solar cell is illuminated under a certain illumination condition.

The technology evolution of solar cells is fast, one of which is the number of main gates of solar cells, increasing from the earlier 2BB to 3BB, 4BB, 5 BB. The 5BB cell has stabilized for a longer period of time, currently transitioning from 5BB to multi-master gate (MBB) orientation. (Note: BB, Busbar, the main grid of a solar cell, used for series welding of two front and rear cells, and also a contact electrode for electrical performance test of a solar cell. MBB cell generally means a cell of 9BB or more.).

Generally, when a test device of a solar cell is upgraded from 5BB to an MBB test machine, the number of probe rows needs to be increased, and the structure of each probe row needs to be changed to adapt to the electrode pattern of the MBB cell. All the probe banks need to be replaced and the number of the probe banks is increased, so that the modification and upgrading cost is high, and the detection cost is increased.

If the MBB battery is directly tested by using 5BB test equipment, because the width of the main grid of the MBB battery is only 0.1-0.3mm and the height of the main grid of the MBB battery is only 0.01-0.03mm, the contact between a probe and the main grid of the battery is unstable, the test repeatability is poor, and the test data is unstable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a solar cell testing arrangement to overcome not enough among the prior art.

In order to realize the purpose of the utility model, the utility model adopts the technical scheme that includes:

the embodiment of the utility model provides a solar cell testing arrangement, solar cell testing arrangement includes: the probe row comprises a plurality of probes which are arranged at intervals in sequence along a specified direction, the main grid pressing strips can be electrically connected with the probes, and the main grid pressing strips can also continuously cover at least one main grid of the battery to be tested and are electrically connected with the main grid covered.

Preferably, the main grid pressing bar is electrically connected to one end of the plurality of probes.

Preferably, the probe row comprises a probe row plate and a plurality of probes, the probes are arranged along the length direction of the probe row plate at intervals in sequence, one ends of the probes are fixedly arranged on the probe row plate, and the other ends of the probes are electrically connected with the main grid pressing strip.

Preferably, the other end of the probe is fixedly connected with the main grid pressing strip.

Preferably, the plurality of probes are fixedly connected with the main grid pressing strip.

Preferably, the solar cell testing device further comprises a plurality of probe banks and a plurality of main grid pressing strips, and each probe bank corresponds to and is connected with one main grid pressing strip.

Preferably, the main grid pressing strips are fixedly arranged on a frame, and the main grid pressing strips and the frame are arranged in an insulating mode.

Preferably, the main grid pressing strip is of a flat and long strip structure.

Preferably, the width of the batten is 0.8-2 mm.

Preferably, the height of the bead is 0.1-0.3 mm.

Compared with the prior art, the utility model has the advantages that:

1. the embodiment of the utility model provides a solar cell testing arrangement, simple structure, easy to use makes the contact stability of probe and battery owner bars improve through the owner bars layering, further promotes test data's stability.

2. The embodiment of the utility model provides a solar cell testing arrangement need not to reform transform the probe row, just can be used for MBB solar cell to detect, reduces the detection cost.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of a conventional solar cell testing apparatus;

FIG. 2 is a side view of a prior art solar cell testing apparatus;

fig. 3 is a schematic structural diagram of a solar cell testing apparatus according to an exemplary embodiment of the present invention;

fig. 4 is a side view of a solar cell testing apparatus according to an exemplary embodiment of the present invention;

fig. 5 is a schematic structural view of a clamp in a solar cell testing apparatus according to an exemplary embodiment of the present invention;

fig. 6 is a side view of a clamp of a solar cell testing apparatus according to an exemplary embodiment of the present invention;

fig. 7 is a schematic structural diagram of a probe bank in a solar cell testing apparatus according to an exemplary embodiment of the present invention;

description of the reference numerals: 1. a test bench; 2. a probe row; 201. a probe array plate; 202. a probe; 3. a solar cell; 4. a battery main grid; 5. a clamp; 501. a first portion; 502. a second portion.

Detailed Description

In view of the deficiencies in the prior art, the inventor of the present invention has made extensive studies and practices to provide the technical solution of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.

Referring to fig. 1, a solar cell testing apparatus provided in this embodiment includes: the test bench 1 is used for placing and fixing the solar cell 3 to be detected, wherein the test bench 1 is provided with a space for placing the solar cell 3, and the space can be used for placing a plurality of solar cells 3 or one solar cell 3.

Specifically, the testing surface of the testing platform 1 may be horizontal or inclined, and the specific situation is determined according to the structure and the testing site formed by the plurality of solar cells 3.

Specifically, one side of the test board 1 is movably provided with a clamp 5, wherein the clamp is used for clamping the solar cell 3 placed in the test board 1, and the clamp 5 is used as a bridge to facilitate the probe arrangement to test the MBB solar cell 3.

In particular, the clamp 5 comprises a main grid bead, which can be regarded as a first part 501 of the clamp, the first part 501 of the clamp 5 presses against the cell main grid 4 of the solar cell 3 on the test stand 1, and the first part 501 forms an ohmic contact with the solar cell 3.

Specifically, the material of the first portion 501 is a high-conductivity material, such as: copper, silver, gold, etc.

Further preferably, the inner core material of the first portion 501 is pure copper, and the copper content is greater than 99%. The outer layer is a tin alloy layer, and the tin content in the alloy layer is 55-100%. Other metals of the alloy layer can be selected from lead, bismuth, silver and copper, wherein the content of the metals is 0-45%.

Specifically, probe row 2 is in contact with first portion 501 of fixture 5, and probe row 2 and first portion 501 of fixture 5 form an ohmic contact.

Specifically, one probe 202 may be provided on the probe line 2, or a plurality of probes 202 may be provided. For example: the probe bank 2 is provided with a plurality of probes 202, the plurality of probes 202 may be arranged on the surface of the probe bank 2 at intervals, and the plurality of probes 202 may also be arranged in a circular array.

Specifically, the first part of the fixture is matched with the pattern position and structure of the main grid 4 of the solar cell. For example, if the shape of the main battery grid 4 is a plurality of straight lines and the straight lines are arranged in parallel at intervals, the shape of the first portion is also a plurality of straight lines and the straight lines are arranged in parallel at intervals, and the shape of the first portion matches with the shape of the main battery grid 4.

In particular, the first portion 501 may be a bead. The batten strip can be better attached to the main grid 4 of the battery. The pressing strip is in a flat strip shape. The flat strip-shaped pressing strip is not prone to tilting when being attached to the main grid 4 of the battery, and stability during measurement is further guaranteed. A plurality of pressing strips or one pressing strip is arranged on the clamp 5. The arrangement of a plurality of or one batten strip realizes that a good and stable ohmic contact is formed between the batten strip and the main grid of the solar cell 3.

Specifically, the width of the battery main grid is about 1mm, so that the width of the pressing strip is 0.8-2 mm. The height of the press strip is 0.1-0.3 mm. Further preferably, the width of the selected pressing strip is 1mm, and the height of the selected pressing strip is 0.2 mm. And the stable contact between the pressing strip and the solar cell is ensured.

In particular, the clamp further comprises a frame, which may be regarded as a second part 502 of the clamp, wherein the second part 502 is mainly used for fixing and supporting the first part 501. For example: the second portion 502 may be an outer frame, and the first portion is welded to the second portion, so as to achieve the integrity of the clamp, facilitate the taking and placing of the clamp during use, and improve the detection efficiency. For example: the second portion 502 may be used as a frame of the central region, the plurality of first portions 501 are fixedly disposed, and the plurality of first portions 501 may be moved simultaneously by taking the second portion 502, so that the first portions 501 are in ohmic contact with the cell main grids 4 of the solar cells 3 quickly.

Specifically, the first portion 501 and the second portion 502 are connected in an insulating manner. Mainly to prevent that the simultaneous detection of a plurality of first parts affects the final detection result. For example: the first and second portions may be connected using an insulating material such as rubber, glass or mica.

Specifically, the first portion is fixedly arranged on one side of the second portion, so that the first portion and the second portion are not in the same horizontal plane, and the surface of the first portion is protruded compared with the contact surface of the solar cell. The contact between the first part and the main grid of the battery is further ensured, and the situation that the surface of the second part is too convex to cause the first part to be not contacted with the main grid of the battery is prevented.

Specifically, a gap should be left between the second portion and the test table, since the second portion is generally made of metal and has conductivity, and the test table is also conductive, in order to prevent the second portion from leaking electricity of the test table, a gap should be left between the second portion and the test table.

Specifically, the test table top of the test table is a horizontal table top. And a concave space is arranged on the test board for placing and fixing the solar cell.

Specifically, the probe row 2 includes a probe row plate 201 and probes 202, a plurality of probes 202 are arranged on the surface of the probe row plate 201 at intervals along the axial direction, and the plurality of probes and the pressing bar are used in cooperation.

The utility model discloses a theory of operation is:

firstly, a solar cell 3 to be tested is placed in a concave space of the test bench 1, then a clamp 5 is placed on the surface of the solar cell 3, and the clamp 5 and the test bench 1 clamp the solar cell 3 to be tested. Further, the first portion 501 of the fixture 5 is attached to the cell main grid 4 of the solar cell 3, so that the first portion 501 and the cell main grid 4 of the solar cell 3 can form a good and stable ohmic contact, and then the probe bank 2 is attached to the first portion 501, so that the probe bank 2 and the first portion 501 can form a good and stable ohmic contact, thereby stably testing the MBB solar cell. Through the verification of an actual test sample, the contact stability of the probe and the main grid of the battery is improved through the first part, and the stability of test data is further improved.

It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the invention, and the purpose of the present invention is to provide those skilled in the art with the understanding of the content of the present invention and the implementation thereof, and therefore, the protection scope of the present invention should not be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A solar cell testing device, characterized by comprising: the probe row comprises a plurality of probes which are arranged at intervals in sequence along a specified direction, the main grid pressing strips can be electrically connected with the probes, and the main grid pressing strips can also continuously cover at least one main grid of the battery to be tested and are electrically connected with the main grid covered.

2. The solar cell testing apparatus according to claim 1, wherein: the main grid pressing strip is electrically connected to one end of the probes.

3. The solar cell testing apparatus according to claim 2, wherein: the probe row comprises a probe row plate and a plurality of probes, the probes are arranged in sequence at intervals along the length direction of the probe row plate, one ends of the probes are fixedly arranged on the probe row plate, and the other ends of the probes are electrically connected with the main grid pressing strip.

4. The solar cell testing apparatus according to claim 3, wherein: the other end of the probe is fixedly connected with the main grid pressing strip.

5. The solar cell testing apparatus according to claim 4, wherein: and the plurality of probes are fixedly connected with the main grid pressing strip.

6. The solar cell testing apparatus according to any one of claims 1 to 5, wherein: the solar cell testing device further comprises a plurality of probe banks and a plurality of main grid pressing strips, and each probe bank corresponds to and is connected with one main grid pressing strip.

7. The solar cell testing apparatus according to claim 6, wherein: the main grid pressing strips are fixedly arranged on a frame, and the main grid pressing strips and the frame are arranged in an insulating mode.

8. The solar cell testing apparatus according to any one of claims 1 to 5, wherein: the main grid pressing strip is of a flat strip structure.

9. The solar cell testing apparatus according to claim 8, wherein: the width of the pressing strip is 0.8-2 mm.

10. The solar cell testing apparatus according to claim 9, wherein: the height of the pressing strip is 0.1-0.3 mm.