CN220440669U

CN220440669U - OBB solar cell's testing arrangement

Info

Publication number: CN220440669U
Application number: CN202321930002.1U
Authority: CN
Inventors: 何保杨; 翁航; 冯佳兵; 施梓祺; 许志敏
Original assignee: Wuhu Gcl Integrated New Energy Technology Co ltd
Current assignee: Wuhu Gcl Integrated New Energy Technology Co ltd
Priority date: 2023-07-21
Filing date: 2023-07-21
Publication date: 2024-02-02
Anticipated expiration: 2033-07-21

Abstract

The application discloses OBB solar cell's testing arrangement includes: the probe row assembly comprises a probe row and a plurality of metal probes which are arranged on the probe row in a sliding manner along the height direction; the pressure regulating assembly is arranged at the top of the probe row and comprises a gas pipe which is arranged in parallel with the probe row, a plurality of nozzles which are arranged on the gas pipe along the length direction and gas supply equipment which is communicated with the gas pipe, the tail end of the metal probe is inserted in the nozzles one by one, a switch valve is arranged between the nozzles and the gas pipe, a piston plate is arranged between the switch valve and the metal probe, an air cavity is arranged between the piston plate and the switch valve, and an air release valve is arranged on the air cavity; and the controller is respectively and electrically connected with the switch valve, the air release valve, the pressure sensor and the air supply equipment and is used for controlling the corresponding switch valve or the air release valve to be opened or closed. The testing device can be suitable for OBB solar cells with different surface conditions, is high in detection accuracy, and can avoid damage to the surface of the cell to be tested caused by the metal probe.

Description

OBB solar cell's testing arrangement

Technical Field

The utility model relates to the technical field of photovoltaic cell testing, in particular to a testing device of an OBB solar cell.

Background

The components mainly comprising the crystalline silicon battery pieces occupy more than 80% of the global photovoltaic component market. The power generation matrix of the crystalline silicon battery piece is a silicon wafer, a plurality of thin grid lines (raw materials are silver paste) are printed on the conventional battery piece to collect current generated by the silicon wafer after the silicon wafer is irradiated by light, and 2-5 main grid lines are printed to collect the current on the thin grid lines. Along with the rapid development of the industry, the method has higher requirements on the cost reduction and efficiency enhancement of the crystalline silicon battery piece. In terms of the cost of the battery piece, the current cost of the silver paste is only inferior to that of a silicon material and is up to 15-25%. In the aspect of generating capacity, the large main and thin grid line coverage areas on the surfaces of the battery pieces become a large constraint factor of generating capacity. Thus, 0BB no main gate line cell technology has evolved. The main grid line is removed and only the thin grid line is reserved on the basis of a conventional battery piece, so that the use amount of silver paste can be greatly reduced on the one hand, the effective illumination area of the battery piece can be increased on the other hand, and the power generation efficiency of the photovoltaic module is improved.

The traditional solar cell testing method is that a metal probe on a probe row is contacted with a main grid line printed on the surface of the solar cell, and current is injected into the solar cell from the main grid line through the probe, so that the purpose of testing the solar cell is achieved, and the method is not suitable for an OBB solar cell without the main grid line.

In the prior art, a metal conduction band is arranged at the bottoms of a plurality of metal probes and is used for being attached to each thin grid line of the solar cell, and current is injected into the solar cell through the thin grid line, so that the purpose of loading voltage between P-N electrodes of the solar cell is achieved, and the purpose of testing the type of cell is further achieved.

However, with the development of photovoltaic cells, curved surface OBB solar cells and irregular surface OBB solar cells gradually appear, and the existing 0BB solar cell testing device is limited by the telescopic lengths of a metal conduction band and a probe, cannot be suitable for the surface states of different OBB solar cells, cannot adjust the force propping against the surface of a battery to be tested, and easily causes the conditions that part of metal probes are not firmly contacted with the surface of the battery to be tested, the measurement accuracy is affected, and part of metal probes are excessively contacted with the surface of the battery to be tested, and the surface of the battery to be tested is damaged.

Disclosure of Invention

The utility model aims to provide a testing device for an OBB solar cell, which is used for solving the problems that the testing device in the prior art cannot be suitable for the surface states of different OBB solar cells, and is easy to cause inaccurate measurement and damage the surface of a cell to be tested.

In order to solve the technical problems, the utility model adopts the following technical scheme:

an OBB solar cell testing apparatus comprising:

the probe row assembly comprises a probe row and a plurality of metal probes which are arranged on the probe row in a sliding manner along the height direction, wherein the head ends and the tail ends of the metal probes respectively extend out of the bottom surface and the top surface of the probe row, and the plurality of metal probes are arranged in parallel and at equal intervals along the length direction of the probe row;

the pressure adjusting assembly is arranged at the top of the probe row and comprises a gas pipe, a plurality of nozzles and gas supply equipment, wherein the gas pipe is arranged in parallel with the probe row, the nozzles are arranged on the gas pipe along the length direction, the gas supply equipment is communicated with the gas pipe, the tail ends of the metal probes are inserted into the nozzles one by one, a switching valve is arranged between the nozzles and the gas pipe, a piston plate is arranged between the switching valve and the metal probes, a pressure sensor is arranged on one surface of the piston plate, facing the metal probes, of the piston plate, an air cavity is arranged between the piston plate and the switching valve, gas is filled in the air cavity, and a gas release valve is arranged on the air cavity; and

and the controller is respectively and electrically connected with the switch valve, the air release valve, the pressure sensors and the air supply equipment, and controls the corresponding switch valve to be opened or closed or controls the corresponding air release valve to be opened or closed according to the detection result of each pressure sensor.

Further, the switch valve is a one-way valve.

Further, the size of the nozzle is matched with the size of the tail end of the metal probe.

Further, a sealing collar is arranged at the bottom of the nozzle, the sealing collar is sleeved on the corresponding metal probe, and the size of the sealing collar is matched with the size of the tail end of the corresponding metal probe.

Further, a sliding structure is arranged between the metal probes and the probe row, the sliding structure comprises a sliding groove and a sliding block inserted into the sliding groove, the sliding groove is arranged on the probe row and extends along the height direction of the probe row, and the sliding block is arranged on the metal probes.

Further, the two ends of the sliding groove are respectively provided with an anti-falling part, and the anti-falling parts are used for limiting the sliding block and the sliding groove to be separated in the height direction.

Further, the head end of the metal probe is provided with a metal block, the cross-sectional area of the metal block is larger than that of the metal probe, and adjacent metal blocks are not contacted.

Further, the bottom surface of the metal block is covered with a flexible conductive layer.

Further, the flexible conductive layer is bonded with the metal block through conductive glue.

Further, mounting holes are formed in two ends of the probe row.

Due to the application of the technical scheme, the application has the beneficial effects compared with the prior art that:

(1) According to the method, each metal probe is connected with the probe row in a sliding mode along the height direction, so that the displacement distance of each metal probe in the height direction is increased, and the method is further suitable for OBB solar cells with different surface conditions;

(2) The pressure adjusting piece is arranged to adjust the pressure of each metal probe propping against the surface of the battery to be measured, so that the pressure of each metal probe acting on the surface of the battery to be measured is the same, the measurement accuracy is improved, and the damage of the metal probes to the surface of the battery to be measured can be avoided;

(3) Through the cooperation of controller, pressure sensor, ooff valve, air release valve and air feed equipment, realize that every metal probe supports the automation of holding pressure and adjusts, and the precision is high, applicable multiple OBB solar cell.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a testing device for an OBB solar cell according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of the structure shown in FIG. 1, partially in section, at A;

fig. 3 is a partially cut-away enlarged schematic view of the structure shown at B in fig. 1.

Reference numerals illustrate:

1-a probe row assembly; 11-probe row; 12-metal probes; 2-a pressure regulating assembly; 21-a gas pipe; 22-nozzles; 23-switching a valve; 24-air cavity; 25-air release valve; 26-a piston plate; 27-a pressure sensor; 3-sliding structure; 31-a chute; 32-a slider; 4-mounting holes; 5-metal blocks; 6-a flexible conductive layer; 7-anti-falling piece.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 3, an embodiment of the utility model provides a testing device for an OBB solar cell, which includes a probe row assembly 1, a pressure adjusting assembly 2 and a controller (not shown).

The probe row 11 assembly comprises a probe row 11 and a plurality of metal probes 12 which are arranged on the probe row 11 in a sliding manner along the height direction, wherein the head ends and the tail ends of the metal probes 12 respectively extend out of the bottom surface and the top surface of the probe row 11, and the metal probes 12 are arranged in parallel and at equal intervals along the length direction of the probe row 11. Mounting holes 4 are formed at two ends of the probe row 11.

Specifically, a sliding structure 3 is disposed between the metal probe 12 and the probe row 11, the sliding structure 3 includes a chute 31 and a slider 32 inserted into the chute 31, the chute 31 is disposed on the probe row 11 and extends along the height direction of the probe row 11, and the slider 32 is disposed on the metal probe 12. The two ends of the chute 31 are respectively provided with an anti-falling part 7, and the anti-falling part 7 is used for limiting the sliding block 32 to be separated from the chute 31 in the height direction. The longitudinal direction is shown by arrow a in fig. 1, and the height direction is shown by arrow b in fig. 1.

In this embodiment, the number of the probe rows 11 is a plurality of the probe rows 11, and the plurality of the probe rows 11 are arranged in parallel and at equal intervals. During detection, the two groups of probe row 11 assemblies are symmetrically arranged on the upper side and the lower side of the OBB solar cell respectively, and are perpendicular to the thin grid lines of the OBB solar cell along the horizontal direction, so that conventional arrangement is adopted, and details are omitted.

The pressure regulating assembly 2 is arranged at the top of the probe row 11, the pressure regulating assembly 2 comprises a gas pipe 21 which is arranged in parallel with the probe row 11, a plurality of nozzles 22 which are arranged on the gas pipe 21 along the length direction and a gas supply device (not shown) which is communicated with the gas pipe 21, the tail ends of the metal probes 12 are inserted into the nozzles 22 one by one, a switching valve 23 is arranged between the nozzles 22 and the gas pipe 21, a piston plate 26 is arranged between the switching valve 23 and the metal probes 12, a pressure sensor 27 is arranged on one surface of the piston plate 26 facing the metal probes 12, a gas cavity 24 is arranged between the piston plate 26 and the switching valve 23, gas is filled in the gas cavity 24, and a gas release valve 25 is arranged on the gas cavity 24.

In this embodiment, the size of the nozzle 22 is adapted to the size of the trailing end of the metal probe 12. So that there is no gap between the nozzle 22 and the tail end of the metal probe 12, and the metal probe 12 can slide in the height direction in the nozzle 22.

In an alternative embodiment, the bottom of the nozzle 22 is provided with a sealing collar (not shown) that fits over the corresponding metal probe 12, and the dimensions of the sealing collar are adapted to the dimensions of the tail end of the corresponding metal probe 12. A sealed cavity is formed by the sealing collar, the metal probe 12 and the nozzle 22, and the metal probe 12 is slidable in the height direction within the nozzle 22 and the sealing collar.

In this embodiment, the on-off valve 23 is a check valve. So as to avoid the reverse backflow of the gas in the gas cavity 24 into the gas pipe 21, and the contact between the metal probe 12 and the surface of the battery to be measured is affected, so that the measurement result is inaccurate.

The controller is respectively and electrically connected with the switch valve 23, the air release valve 25, the pressure sensors 27 and the air supply equipment, and controls the corresponding switch valve 23 to be opened or closed or controls the corresponding air release valve 25 to be opened or closed according to the detection result of each pressure sensor 27. It should be noted that, the controller adopts a single chip microcomputer or a logic circuit to realize control, which is the prior art and will not be described herein.

During measurement, the head end of the metal probe 12 is abutted against the surface of the battery to be measured, the battery to be measured applies an acting force to the metal probe 12 to enable the metal probe 12 to move upwards along the height direction, at this time, the metal probe 12 is abutted against the pressure sensor 27 on the piston plate 26, the pressure sensor 27 sends a signal to the controller, and when the pressure value detected by the pressure sensor 27 is greater than the pressure threshold value, the controller controls the air release valve 25 on the corresponding air cavity 24 to be opened so as to release the air in the air cavity 24, and therefore the pressure applied to the surface of the battery to be measured by the corresponding metal probe 12 is reduced; when the pressure value detected by the pressure sensor 27 is greater than the pressure threshold value, the controller controls the air supply device to supply air and controls the corresponding one-way valve to open so as to blow air into the corresponding nozzle 22 and provide pressure for the metal probe 12, so that the metal probe 12 is abutted against the surface of the battery to be tested.

It should be noted that the pressure threshold may be a fixed value, or an interval range, which is preset, and this application is not limited specifically. The air supply device is a conventional device and will not be described in detail herein.

In order to improve the efficiency of collecting current and voltage on the whole battery piece by the metal probe 12, the head end of the metal probe 12 is provided with a metal block 5, the cross-sectional area of the metal block 5 is larger than that of the metal probe 12, and adjacent metal blocks 5 are not contacted. In order to further improve the contact tightness of the metal block 5 with the surface of the battery to be tested, the bottom surface of the metal block 5 is covered with a flexible conductive layer 6.

In this embodiment, the metal block 5 is soldered to the metal probe 12. The metal block 5 and the flexible conductive layer 6 are bonded by conductive glue (not shown). The flexible conductive layer 6 is made of a flexible conductive material, and specifically, a high conductive surface containing silver and other metals is deposited on the transparent polyester film by a vacuum sputtering method, which is not specifically limited in this regard.

Finally, it should be noted that the foregoing description is only a preferred embodiment of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, and any modifications, equivalents, improvements or changes thereof may be made without departing from the spirit and principle of the present utility model.

Claims

1. An OBB solar cell testing apparatus, comprising:

2. The apparatus for testing an OBB solar cell according to claim 1, wherein the on-off valve is a one-way valve.

3. The apparatus of claim 1, wherein the nozzle is sized to fit the size of the tail end of the metal probe.

4. The device for testing an OBB solar cell according to claim 1, wherein a sealing collar is disposed at the bottom of the nozzle, the sealing collar is sleeved on the corresponding metal probe, and the sealing collar is sized to fit the tail end of the corresponding metal probe.

5. The apparatus of claim 1, wherein a sliding structure is disposed between the metal probe and the probe row, the sliding structure comprising a chute and a slider inserted into the chute, the chute being disposed on the probe row and extending in a height direction of the probe row, the slider being disposed on the metal probe.

6. The device for testing an OBB solar cell according to claim 5, wherein two ends of the sliding groove are respectively provided with an anti-falling member, and the anti-falling member is used for limiting the sliding block and the sliding groove to be separated in the height direction.

7. The apparatus of claim 1, wherein the tip of the metal probe is provided with a metal block having a cross-sectional area greater than that of the metal probe, and adjacent metal blocks are not in contact with each other.

8. The apparatus of claim 7, wherein the bottom surface of the metal block is covered with a flexible conductive layer.

9. The device for testing an OBB solar cell according to claim 8, wherein the flexible conductive layer is bonded to the metal block by conductive glue.

10. The device for testing an OBB solar cell according to claim 1, wherein the probe row has mounting holes at both ends thereof.