CN221007131U

CN221007131U - Testing arrangement of solar cell's bending resistance performance

Info

Publication number: CN221007131U
Application number: CN202322607541.8U
Authority: CN
Inventors: 周公庆; 周华; 刘宗刚; 袁桃生; 刘赖生; 廖海伦
Original assignee: Tongwei Solar Meishan Co Ltd
Current assignee: Tongwei Solar Meishan Co Ltd
Priority date: 2023-09-25
Filing date: 2023-09-25
Publication date: 2024-05-24
Anticipated expiration: 2033-09-25

Abstract

The application provides a device for testing bending resistance of a solar cell, and relates to the technical field of photovoltaics. The device for testing the bending resistance of the solar cell comprises a pressing piece and two supporting pieces. The two supporting pieces are arranged at intervals and are used for supporting the solar cell together; the pressing piece is arranged above the two supporting pieces and between the two supporting pieces, and is used for propping against the solar cell and pressing the solar cell. A temperature regulating member is arranged in any support member or/and the pressure applying member, and the temperature regulating member is used for heating or/and cooling the solar cell. The device for testing the bending resistance of the solar cell provided by the application can simulate the condition that temperature differences exist at different areas of the solar cell in the bending resistance testing process of the solar cell, test the bending resistance of the solar cell when the temperature differences exist at the different areas, screen the solar cell with hidden danger of cracking of the photovoltaic module before the assembly of the photovoltaic module, and prolong the service life of the photovoltaic module.

Description

Testing arrangement of solar cell's bending resistance performance

Technical Field

The application relates to the technical field of photovoltaics, in particular to a device for testing bending resistance of a solar cell.

Background

The photovoltaic module is formed by connecting a plurality of solar cells in series and parallel and assembling the solar cells in a lamination mode. When a plurality of solar cells are assembled into a photovoltaic module, the bending resistance of the solar cells is required to be tested, and then the plurality of solar cells with the bending resistance meeting the requirement are assembled into the photovoltaic module. If the bending resistance of the solar cell is poor, the solar cell rupture phenomenon can occur in the lamination process of assembling the photovoltaic module, and the solar cell rupture phenomenon can also occur in the subsequent use process of the assembled photovoltaic module, so that the local failure and other conditions of the photovoltaic module are caused, and the power and the service life of the photovoltaic module are seriously influenced.

In the working process of the photovoltaic module, local short circuit, overheating and other conditions often occur in the photovoltaic module, and a solar cell in the photovoltaic module is more prone to cracking. However, the device for testing the bending resistance of the solar cell in the prior art cannot test the bending resistance of the solar cell when the temperature difference exists in different areas, cannot evaluate the bending resistance of the solar cell when the temperature difference exists in different areas, and is not beneficial to screening out the solar cell with the hidden danger of cracking of the photovoltaic module.

Disclosure of utility model

The application aims to provide a device for testing the bending resistance of a solar cell, which aims to solve the technical problem that the conventional device for testing the bending resistance of the solar cell cannot test the bending resistance of different areas of the solar cell when temperature differences exist.

The application provides a testing device for bending resistance of a solar cell. The two supporting pieces are arranged at intervals and are used for supporting the solar cell together; the pressing piece is arranged above the two supporting pieces and between the two supporting pieces, and is used for propping against the solar cell and pressing the solar cell. Wherein, a temperature regulating piece is arranged in any support piece or/and the pressure applying piece, and the temperature regulating piece is used for heating or/and cooling the solar cell.

According to the device for testing the bending resistance of the solar cell, provided by the application, the temperature adjusting piece is arranged in any support piece for supporting the solar cell or/and the pressing piece for pressing the solar cell, so that the corresponding area of the solar cell (namely the area of the solar cell, which is propped against the support piece or/and the pressing piece) is heated or/and cooled, the condition that temperature differences exist in different areas of the solar cell can be simulated in the bending resistance testing process of the solar cell, the bending resistance of the solar cell when the temperature differences exist in the different areas can be tested, the solar cell with hidden danger of cracking generated by the photovoltaic module can be screened out before the solar cell is assembled into the photovoltaic module, and the service life of the photovoltaic module can be prolonged.

In an alternative embodiment of the application, the material of the support or the pressure member provided with the temperature regulating member is a heat conducting material, and the temperature regulating member is a heating element or a cooling element.

According to the technical scheme, the corresponding areas of the solar cell can be heated or/and cooled, the solar cell can show the condition that temperature differences exist in different areas in the process of testing the bending resistance of the solar cell, and further the bending resistance of the solar cell when the temperature differences exist in the different areas is tested.

In an alternative embodiment of the application, the support member and the pressing member have an abutting end for abutting against the solar cell, and the temperature adjusting member is disposed inside the support member or the pressing member and on a side close to the abutting end.

According to the technical scheme, the temperature adjusting piece can rapidly and effectively heat or/and cool the corresponding region of the solar cell, so that the temperature loss caused by 'heating or/and cooling the corresponding region of the solar cell' can be reduced, and the situation that the solar cell has temperature difference in different regions can be more accurately shown.

In an alternative embodiment of the application, the heating element is a heating resistance wire.

The above-described solution makes it possible to increase the temperature of the contact area of the solar cell with the support or pressure piece provided with the heating element.

In an alternative embodiment of the application, the cooling element is a cooling tube having an inlet end which is in fluid communication with the cooling fluid outside the support or the pressure member.

The above-described solution makes it possible to reduce the temperature of the contact area of the solar cell with the support or pressure piece provided with the cooling element.

In an alternative embodiment of the application, a heating element is provided in both supports and a cooling element is provided in the press.

According to the technical scheme, the contact area of the solar cell with the supporting piece can be heated or/and the contact area of the solar cell with the pressure applying piece can be cooled.

In an alternative embodiment of the application, the support member has a support surface for supporting the solar cell, and the support surface is an arc surface protruding upwards; or/and the pressing piece is provided with a pressing surface which is used for supporting the solar cell, and the pressing surface is a cambered surface protruding downwards.

According to the technical scheme, in the process of pressing the solar cell to test the bending resistance, damage to the solar cell caused by the support surface of the support piece or/and the pressing surface of the pressing piece is avoided.

In an alternative embodiment of the application, the support is cylindrical; or/and, the pressurizing member is cylindrical.

In an alternative embodiment of the application, the number of the pressing pieces is two, the two pressing pieces are arranged at intervals, and the two pressing pieces are used for jointly supporting and pressing the solar cell.

By the technical scheme, simultaneous pressing of two areas of the solar cell can be realized.

In an alternative embodiment of the application, the testing device further comprises a driving member and a pressure sensor, wherein the driving member is connected with the pressing member, the driving member is used for driving the pressing member to move towards the solar cell, and the pressure sensor is used for recording the pressure value applied by the pressing member to the solar cell.

According to the technical scheme, the solar cell can be pressed by the pressing piece, and the pressure value of the pressing piece applied to the solar cell can be obtained.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a first example of a testing device for bending resistance of a solar cell according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a second example of a testing device for bending resistance of a solar cell according to an embodiment of the present application.

Fig. 3 is a schematic cross-sectional view of a first example of a testing device for bending resistance of a solar cell according to an embodiment of the present application.

Fig. 4 is a schematic cross-sectional view of a second example of a testing device for bending resistance of a solar cell according to an embodiment of the present application.

Icon: 100-supporting pieces; 200-pressing part; 300-solar cell; 400-temperature adjusting piece; 500-driving member; 600-pressure sensor.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and in the description of the drawings above are intended to cover non-exclusive inclusions.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "upper", "lower", "inner", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the term "connected" and the like should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

In the working process of the photovoltaic module, the solar cell in the photovoltaic module often has the conditions of overhigh or overlow local cell efficiency, local electric leakage and the like, so that the temperature difference of different areas of the solar cell in the photovoltaic module is caused; in severe cases, the temperature difference at different regions of the solar cell may reach over 100 ℃.

The inventor finds that when temperature differences exist in different areas of a solar cell in a photovoltaic module, the lattice gap of a silicon substrate in a high-temperature area of the solar cell is large, the lattice gap of the silicon substrate in a low-temperature area is small, and the lattice dislocation area of the silicon substrate of the solar cell can generate defects, so that the lattice dislocation area of the solar cell is more prone to cracking. Therefore, before a plurality of solar cells are assembled into a photovoltaic module, bending resistance performance when temperature differences exist in different areas of the solar cells needs to be tested.

However, the device for testing the bending resistance of the solar cell in the prior art cannot test the bending resistance of the solar cell when the temperature difference exists in different areas, cannot evaluate the bending resistance of the solar cell when the temperature difference exists in different areas, and is not beneficial to screening out the solar cell with the hidden danger of cracking of the photovoltaic module.

Therefore, the device for testing the bending resistance of the solar cell in the prior art is improved, so that the technical problem that the conventional device for testing the bending resistance of the solar cell cannot test the bending resistance of different areas of the solar cell when temperature differences exist can be solved. In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

Fig. 1 is a schematic structural diagram of a first example of a device for testing bending resistance of a solar cell according to an embodiment of the present application, and fig. 2 is a schematic structural diagram of a second example of a device for testing bending resistance of a solar cell according to an embodiment of the present application, referring to fig. 1 and fig. 2, the device for testing bending resistance of a solar cell according to the present application includes a pressing member 200 and two supporting members 100. The two supporting members 100 are spaced apart and serve to commonly support the solar cell 300; the pressing member 200 is disposed above the two supporting members 100 and between the two supporting members 100, and the pressing member 200 is used for pressing against the solar cell 300 and pressing the solar cell 300.

Fig. 3 is a schematic cross-sectional view of a first example of a device for testing bending resistance of a solar cell according to an embodiment of the present application, and fig. 4 is a schematic cross-sectional view of a second example of a device for testing bending resistance of a solar cell according to an embodiment of the present application, please refer to fig. 1 to 4, in which a temperature regulator 400 is disposed in any one of the support members 100 and/or the pressing member 200, and the temperature regulator 400 is used for heating or/and cooling a corresponding region of the solar cell 300 (i.e., a region of the solar cell 300 abutting against the support member 100 and/or the pressing member 200).

In the device for testing the bending resistance of the solar cell provided by the application, the temperature adjusting piece 400 is arranged in any support piece 100 for supporting the solar cell 300 or/and the pressing piece 200 for pressing the solar cell 300 so as to heat or/and cool the corresponding area of the solar cell 300 (namely the area of the solar cell 300 which is propped against the support piece 100 or/and the pressing piece 200), so that the condition that temperature differences exist in different areas of the solar cell 300 can be simulated in the bending resistance testing process of the solar cell 300, the bending resistance of the solar cell 300 when the temperature differences exist in the different areas can be tested, the solar cell 300 with hidden danger of cracking generated by the photovoltaic module can be screened out before the solar cell 300 is assembled into the photovoltaic module, and the service life of the photovoltaic module can be prolonged.

In the present application, the material of the support 100 or the pressing member 200 provided with the temperature adjusting member 400 is a heat conductive material. The corresponding region of the solar cell 300 can be heated or/and cooled, and the solar cell 300 can show the condition that the temperature difference exists in different regions in the process of testing the bending resistance of the solar cell 300, so that the bending resistance of the solar cell 300 when the temperature difference exists in different regions is tested.

As an example, the material of the support 100 or the pressing member 200 provided with the temperature adjustment member 400 may be ceramic, stainless steel, or the like, and the present application does not limit the material of the support 100 or the pressing member 200 provided with the temperature adjustment member 400 so long as the temperature adjustment member 400 can heat or/and cool the corresponding region of the solar cell 300.

In some alternative embodiments of the present application, the supporter 100 or the pressing member 200 provided with the temperature adjusting member 400 has an inner cavity (not shown), an opening (not shown) communicating the inner cavity with the supporter 100 or the pressing member 200, and a blocking member (not shown), such as a baffle plate, etc., for optionally blocking the opening, and the temperature adjusting member 400 is disposed in the inner cavity. The above arrangement facilitates the replacement of the temperature adjusting member 400 in the supporting member 100 or the pressing member 200 at any time as needed.

In some alternative embodiments of the present application, the thermostat 400 is a heating element or a cooling element. Heating elements or cooling elements may be disposed in the corresponding support members 100 or the pressing members 200 according to actual needs, so as to heat or cool the corresponding areas of the solar cell 300 according to actual needs, and further enable the solar cell 300 to show that temperature differences exist in different areas during the process of testing the bending resistance of the solar cell 300.

The support 100 and the pressing member 200 have a pressing end for pressing the solar cell 300, the pressing end of the support 100 is an upper end of the support 100, and the pressing end of the pressing member 200 is a lower end of the pressing member 200.

In some alternative embodiments of the present application, the temperature adjusting member 400 is disposed inside the support member 100 or the pressing member 200 and located at a side near the abutting end.

By the above arrangement, the temperature adjusting member 400 can rapidly and effectively heat or/and cool the corresponding region of the solar cell 300, so that the temperature loss caused by the "in-process of heating or/and cooling the corresponding region of the solar cell 300" can be reduced, and the solar cell 300 can more accurately represent the condition that the temperature difference exists at different regions.

In some alternative embodiments of the application, the heating element is a heating resistance wire. An increase in the temperature of the contact area of the solar cell 300 "with the support 100 or the pressure member 200 provided with the heating element" can be achieved.

Illustratively, when the heating element is a heating resistance wire, the heating resistance wire is disposed in the support 100 or/and the pressing member 200, and the heating resistance wire is electrically connected to a power supply device outside the support 100 or/and the pressing member 200.

It should be noted that, in other alternative embodiments of the present application, the heating element may be other heating devices, for example, the heating element may be an electromagnetic heater, where the electromagnetic heater is disposed in the supporting member 100 or/and the pressing member 200, and the electromagnetic heater is electrically connected to a power supply device outside the supporting member 100 or/and the pressing member 200; alternatively, the heating element may be a heating tube disposed in the support 100 or/and the pressure member 200, the heating tube having an input end that communicates with a heat source (e.g., a hot gas or a hot liquid phase) external to the support 100 or/and the pressure member 200.

In some alternative embodiments of the application, the cooling element is a cooling tube having an input end in fluid communication with the cooling fluid outside of the support 100 or the pressure member 200. It is possible to achieve a reduction in the temperature of the contact area of the solar cell 300 "with the support 100 or the pressure member 200 provided with the cooling element".

In some alternative embodiments of the application, heating elements are provided within both supports 100, and cooling elements are provided within the press 200. In the above-described technical solution, the contact area of the solar cell 300 with the support 100 may be heated, and the contact area of the solar cell 300 with the pressing member 200 may be cooled.

It should be noted that, in other possible embodiments, the cooling elements may be disposed in both the supporting members 100, and the heating elements may be disposed in the pressing member 200; the specific temperature adjusting member 400 may be provided in the support member 100 and the pressing member 200 according to actual needs.

In order to reduce the probability of damage to the solar cell 300 caused by the support surface of the support member 100 and the pressing surface of the pressing member 200 during the pressing of the solar cell 300 to test the bending resistance, in some alternative embodiments of the present application, the support member 100 has a support surface for supporting the solar cell 300, and the support surface is an arc surface protruding upward; the pressing member 200 has a pressing surface for abutting against the solar cell 300, and the pressing surface is a cambered surface protruding downward.

Further, in some alternative embodiments of the present application, the support 100 is cylindrical and the pressing member 200 is cylindrical.

Illustratively, the radial cross-section of the support 100 has a diameter of 0.6-1.0cm and the pressure application member 200 has a diameter of 0.6-1.0cm. The diameter of the specific radial section can be set according to practical situations.

In other possible embodiments, only the support surface of any one of the supports 100 may be an arc surface protruding upward, or only the pressing surface of the pressing member 200 may be an arc surface protruding downward.

In the first example as shown in fig. 1 and 3, the number of the supporting pieces 100 is two, and the number of the pressing pieces 200 is one. In the second example as shown in fig. 2 and 4, the number of the supporting members 100 is two, and the number of the pressing members 200 is also two.

It should be noted that, in other alternative embodiments of the present application, the number of the pressing members 200 may be three or more, and the number of the pressing sites may be correspondingly set according to the actual requirement.

In some alternative embodiments of the present application, the testing device further includes a driving member 500, where the driving member 500 is connected to the pressing member 200, and the driving member 500 is used to drive the pressing member 200 to move toward the solar cell 300, so as to enable the pressing member 200 to abut against the solar cell 300 supported by the support member 100 and press the solar cell 300.

As an example, the driving means may be a power mechanism such as a motor or a cylinder.

It should be noted that, in other alternative embodiments of the present application, the driving member 500 may also be connected to the two supporting members 100 at the same time, so that when the two supporting members 100 support the solar cell 300 together, the driving member 500 drives the two supporting members 100 to move upwards at the same time, so that the pressing member 200 can abut against the solar cell 300 and press the solar cell 300.

Further, in some alternative embodiments of the present application, the testing device further comprises a pressure sensor 600, wherein the pressure sensor 600 is configured to record a pressure value applied by the pressure applying member 200 to the solar cell 300. It is possible to achieve a pressure value applied to the solar cell 300 by the pressing member 200.

It should be noted that, in other alternative embodiments of the present application, the testing device may not include the driving member 500 and the pressure sensor 600, and the pressure applying member 200 in the testing device is connected to the driving member 500 connected to the pressure sensor 600.

In some alternative embodiments of the present application, the testing device further includes a sliding rail (not shown in the drawings), which is disposed below the two supporting members 100 and slidingly connected to the lower ends of the two supporting members 100; by sliding the two supports 100, the distance between the two supports 100 can be adjusted, thereby realizing that the two supports 100 can support solar cells 300 of different sizes together.

As an example, the working principle of the testing device for bending resistance of the solar cell provided by the embodiment of the application is as follows:

The solar cell 300 is placed over the two supports 100 so that the two supports 100 can commonly support the solar cell 300. The temperature adjustment member 400 provided in the support member 100 or/and the pressing member 200 is temperature-adjusted so that the support member 100 or/and the pressing member 200 can be used to heat or/and cool a corresponding region of the solar cell 300 (i.e., a region of the solar cell 300 that is abutted against the support member 100 or/and the pressing member 200). The support member 100 and the pressing member 200 are driven to approach each other, so that the pressing member 200 can be abutted against the solar cell 300 supported by the support member 100, thereby applying pressure to the solar cell 300, heating or/and cooling the corresponding region of the solar cell 300, and further testing the bending resistance of the solar cell 300 when temperature differences exist at different regions.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The utility model provides a testing arrangement of solar cell's bending resistance performance which characterized in that includes:

The two supporting pieces are arranged at intervals and are used for supporting the solar cells together;

The pressing piece is arranged above the two supporting pieces and is positioned between the two supporting pieces, and the pressing piece is used for propping against the solar cell and pressing the solar cell;

And a temperature regulating piece is arranged in any one of the supporting pieces or/and the pressure applying piece, and the temperature regulating piece is used for heating or/and cooling the solar cell.

2. The test device according to claim 1, wherein the material of the support member or the pressure member provided with the temperature adjusting member is a heat conductive material, and the temperature adjusting member is a heating element or a cooling element.

3. The test device according to claim 2, wherein the support member and the pressing member have holding ends for holding the solar cell, and the temperature adjusting member is provided inside the support member or the pressing member and on a side close to the holding ends.

4. The test device of claim 2, wherein the heating element is a heating resistance wire.

5. The test device of claim 2, wherein the cooling element is a cooling tube having an input in fluid communication with a cooling fluid outside of the support or the compression member.

6. The test device of claim 2, wherein the heating element is disposed in both of the supports and the cooling element is disposed in the press.

7. The test device according to any one of claims 1-6, wherein the support has a support surface for holding the solar cell, and the support surface is a cambered surface protruding upward;

Or/and the pressing piece is provided with a pressing surface, the pressing surface is used for propping against the solar cell, and the pressing surface is a cambered surface protruding downwards.

8. The test device of claim 7, wherein the support is cylindrical;

Or/and, the pressurizing piece is cylindrical.

9. The test device of any one of claims 1-6, wherein the number of pressing members is two, the two pressing members are spaced apart, and the two pressing members are configured to jointly abut against and press the solar cell.

10. The test device of any one of claims 1-6, further comprising a driving member coupled to the pressing member, the driving member configured to drive the pressing member toward the solar cell, and a pressure sensor configured to record a pressure value applied by the pressing member to the solar cell.