CN219716876U

CN219716876U - Photovoltaic solder strip and photovoltaic module

Info

Publication number: CN219716876U
Application number: CN202320069570.0U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Suzhou Liannuo Solar Energy Technology Co ltd
Current assignee: Suzhou Liannuo Solar Energy Technology Co ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-09-19
Anticipated expiration: 2033-01-10

Abstract

The utility model discloses a photovoltaic solder strip and a photovoltaic module, and relates to the technical field of solar cells. The photovoltaic welding strip is used for connecting a plurality of solar cells, a first area and a second area are arranged on the solar cells, and the first area is arranged on the outer side of the second area and is close to the edge of the solar cells; the photovoltaic welding strip comprises a first welding strip and a second welding strip, wherein the first welding strip is arranged in a first area, the second welding strip is arranged in a second area, and the cross section area of the first welding strip is larger than that of the second welding strip. The utility model can solve the problem that the current conduction is carried out by adopting the welding strips with the same specification, and the welding strips with different specifications cannot be suitable for the position of different areas, and can improve the conductivity of the edge area of the battery piece by arranging the welding strips with different specifications, thereby being beneficial to improving the absorption of the battery piece to light and further improving the performance of the photovoltaic module.

Description

Photovoltaic solder strip and photovoltaic module

Technical Field

The utility model belongs to the technical field of solar cells, and particularly relates to a photovoltaic solder strip and a photovoltaic module.

Background

With the development of technology, solar devices such as photovoltaic modules have become conventional clean energy supply devices worldwide, and photovoltaic modules are increasingly used. In general, a photovoltaic module is generally composed of a plurality of solar cells, two adjacent solar cells can be connected through a solder strip, that is, in the manufacture of the photovoltaic module, the solar cells need to be welded by using the solder strip, so that the two adjacent solar cells are connected together in series, and the solder strip after welding can effectively conduct current.

In the related art, the same specification of welding strip is generally used for conducting current for the same photovoltaic module, however, the magnitude of the current to be conducted for different area positions of the battery piece may be different. For example, the outermost solder strips near the edge region need to conduct more current than the other solder strips, but the same specification of solder strips currently used cannot meet this requirement. In addition, with the continuous development of future photovoltaic modules, the problem will be more obvious due to the diversification of the size of the battery cells or the further expansion of the area of the battery cells.

Disclosure of Invention

The present utility model aims to solve at least one of the above technical problems to some extent.

Therefore, the photovoltaic welding strip and the photovoltaic module provided by the utility model can solve the problem that the current is conducted by adopting the welding strip with the same specification, and the current cannot be conducted in different areas, so that the conductivity of the edge area of the battery piece can be improved, and the absorption of the battery piece to light can be improved.

In order to solve the technical problems, the utility model is realized as follows:

according to the embodiment of the utility model, the photovoltaic welding strip is used for connecting a plurality of solar cells, the solar cells are provided with a first area and a second area, and the first area is arranged outside the second area and is close to the edge of the solar cells;

the photovoltaic welding strip comprises a first welding strip and a second welding strip, wherein the first welding strip is arranged in a first area, the second welding strip is arranged in a second area, and the cross section area of the first welding strip is larger than that of the second welding strip.

In addition, the photovoltaic solder strip according to the utility model may also have the following additional technical features:

in some of these embodiments, the first and second solder strips are circular in cross-section, and the first solder strip has a diameter that is greater than the diameter of the second solder strip.

In some of these embodiments, the first weld bead has a diameter in the range of 0.2mm to 0.5mm;

the diameter of the second welding strip ranges from 0.18mm to 0.3mm.

In some of these embodiments, the shape of the cross-section of the first and second solder strips includes any of a triangle, square, trapezoid, or oval.

In some embodiments, the number of first bonding straps is a plurality, the number of second bonding straps is a plurality, and the number of second bonding straps is greater than the number of first bonding straps.

In some of these embodiments, the first region has a smaller footprint than the second region.

In some embodiments, the first solder strip and the second solder strip each comprise a solder strip body and a coating layer arranged on the outer surface of the solder strip body, and the material of the coating layer comprises any one of tin indium, tin lead bismuth, tin bismuth silver or tin indium bismuth copper.

According to the embodiment of the utility model, the photovoltaic module is further provided with at least two solar cells and the photovoltaic solder strip, wherein the two adjacent solar cells are electrically connected through the photovoltaic solder strip.

In some embodiments, the solar cell is any one of a full cell, a half cell, a third cell, or a quarter cell.

The photovoltaic solder strip comprises a first solder strip and a second solder strip with different sizes, wherein the first solder strip is arranged in a first area close to the edge of the solar cell, the second solder strip is arranged in a second area inside the edge of the solar cell, and the cross section area of the first solder strip is larger than that of the second solder strip, namely, the first solder strip is thicker than that of the second solder strip. In comparison, a thicker solder strip has greater conductivity and is capable of conducting greater current; therefore, the utility model can effectively improve the current conduction capacity of the edge area and alleviate the defect that the welding strips with the same specification cannot meet the requirement in the related technology by arranging the thicker first welding strip with larger cross section area near the edge area of the battery piece and arranging the thinner second welding strip with smaller cross section area at other positions. And, through setting up thinner second welding strip that the cross-sectional area is less in other positions, can reduce and shelter from the area for the effective light receiving area of battery piece increases, is favorable to improving the absorption of battery piece to light, and then helps improving photovoltaic cell's output, thereby promotes photovoltaic module's performance.

The photovoltaic module according to the embodiment of the utility model comprises the photovoltaic solder strip, and the photovoltaic solder strip according to the embodiment of the utility model has the beneficial effects, so that the photovoltaic module according to the embodiment of the utility model has the corresponding beneficial effects by arranging the photovoltaic solder strip, and the description is omitted.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural diagram of a photovoltaic solder strip according to an embodiment of the present utility model;

fig. 2 is a schematic view of another view angle structure of a photovoltaic solder strip according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a photovoltaic solder strip according to an embodiment of the present utility model.

Reference numerals illustrate:

100-solar cell sheets; 110-a first region; 120-a second region;

210-a first solder strip; 220-second solder strips.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The following describes embodiments of the present utility model in detail through specific embodiments and application scenarios thereof with reference to the accompanying drawings.

Referring to fig. 1 to 3, in some embodiments, a photovoltaic solder strip is provided, which can be applied in a photovoltaic module, to realize electrical connection between two adjacent solar cells 100, and in the photovoltaic module, the photovoltaic solder strip can effectively conduct current.

Specifically, the photovoltaic solder strip may be used to connect a plurality of solar cells 100, that is, the photovoltaic module may include a plurality of solar cells 100, where two adjacent solar cells 100 may be connected by the solder strip, so that the plurality of solar cells 100 may be connected by the photovoltaic solder strip. The solar cell 100 has a first region 110 and a second region 120, the first region 110 is disposed outside the second region 120, and the first region 110 is close to an edge of the solar cell 100. The first region 110 may be an edge region of the solar cell sheet 100, that is, a region near the edge of the solar cell sheet 100 or outside the solar cell sheet 100, and the second region 120 may be a region other than the first region 110.

The photovoltaic solder strip includes a first solder strip 210 and a second solder strip 220, the first solder strip 210 is disposed in the first region 110, the second solder strip 220 is disposed in the second region 120, and the cross-sectional area of the first solder strip 210 is larger than that of the second solder strip 220. The first solder strips 210 and the second solder strips 220 have different specifications, the first solder strips 210 disposed in the edge region near the solar cell 100 are relatively thick, and the second solder strips 220 disposed in the remaining region, i.e., the second region 120, are relatively thin. Thus, the edge conductivity of the solar cell can be improved.

In view of the current conduction scheme using the welding strip, the welding strip with the same specification is used for conducting current, and compared with the welding strips at other positions, the welding strip at the edge area, namely the welding strip near the outer side, needs to transmit more current, but the current requirement cannot be met by using the welding strip with the same specification. The photovoltaic solder strip provided in this embodiment can effectively alleviate the above-mentioned problems, and in this embodiment, by providing the first solder strip 210 and the second solder strip 220 with different dimensions, the cross-sectional area of the first solder strip 210 in the first area 110 near the edge of the solar cell 100 is larger than the cross-sectional area of the second solder strip 220 in the second area 120, that is, the first solder strip 210 is thicker than the second solder strip 220. In comparison, a thicker solder strip has greater conductivity and is capable of conducting greater current; therefore, the utility model can effectively improve the current conduction capacity of the edge area by arranging the thicker first welding strip 210 with larger cross section area near the edge area of the battery piece and arranging the thinner second welding strip 220 with smaller cross section area at the rest positions, thereby alleviating the defect that the welding strip with the same specification cannot meet the requirement in the related technology. In addition, by arranging the thinner second welding strip 220 with smaller cross-sectional area at the rest positions, the shielding area can be reduced, so that the effective light receiving area of the battery piece

The increase is favorable to improving the absorption of battery piece to light, and then helps improving the output of photovoltaic cell, thereby 5 promotes photovoltaic module's performance.

According to the embodiment, the photovoltaic solder strip provided by the utility model uses a relatively thick solder strip to improve the edge conductivity of the solar cell 100, and is suitable for various bonding modes of the solder strip and the cell such as welding, film coating and the like. That is, the first and second solder strips 210 and 220 and the solar cell 100 may be

Bonding may be performed in a variety of ways, such as by welding, lamination or other various bonding means known in the art. 0 according to the present embodiment, in the provided photovoltaic solder strips, the cross-sectional shapes of the first solder strip 210 and the second solder strip 220 may have various types, such as common solder strips of various shapes including circular, triangular, rectangular, and the like.

Illustratively, in some embodiments, the cross-sections of the first and second solder strips 210, 220 are each circular, and the diameter of the first solder strip 210 is greater than the diameter of the second solder strip 220, such that the cross-sectional area of the first solder strip 5 210 is greater than the cross-sectional area of the second solder strip 220. Adopts a circular welding strip, has simple structure,

easy processing and manufacturing, strong adaptability and wider application range.

In some embodiments, first solder strip 210 has a diameter in the range of 0.2mm-0.5mm; the diameter of the second solder strip 220 ranges from 0.18mm to 0.3mm. In the above range, the first bonding tape 210

Is larger than the diameter of the second solder strip 220. Further, the diameter of the first solder strip 210 may range from 00.2mm to 0.35mm; the diameter of the second bond strap 220 may range from 0.18mm to 0.3mm. By way of example only, and not by way of limitation,

the first bonding tape 210 may have a diameter of 0.2mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc., and the second bonding tape 220 may have a diameter of 0.18mm, 0.2mm, 0.25mm, 0.3mm, etc., and

the diameter of the first bond strap 210 needs to be greater than the diameter of the second bond strap 220.

The photovoltaic solder strip of this embodiment may be suitable for common solder strips with different 5 specifications, such as 0.18mm, 0.22mm, 0.3mm, etc., and the diameter of the first solder strip 210 is greater than the diameter of the second solder strip 220; its adaptability to

Strong, and is convenient to process and manufacture by using the existing equipment.

It should be noted that, in other embodiments, the diameter ranges of the first solder ribbon 210 and the second solder ribbon 220 may be adaptively adjusted according to the area of the solar cell 100, for example, when the area of the solar cell 100 is larger, the diameter of the first solder ribbon 210 may be larger than 0.5mm, and the diameter of the second solder ribbon 220 may be slightly adaptively adjusted.

In other embodiments, the cross-sectional shape of the first and second solder strips 210, 220 includes any of a triangle, square, trapezoid, or oval. Illustratively, the cross-sectional shape of the first solder strip 210 may also be triangular, may be square, such as rectangular, may be trapezoidal, may be oval, etc.; the cross-sectional shape of the second solder strip 220 may also be triangular, may be square, such as rectangular, may be trapezoidal, may be oval, etc. The cross-sectional shapes of the first and second bonding tapes 210 and 220 may be the same or different, and preferably the same.

In addition, in other embodiments, the cross-sectional shapes of the first solder strip 210 and the second solder strip 220 are not limited to the above listed ones, and the cross-sections of the first solder strip 210 and the second solder strip 220 may also take other shapes in order to meet the requirements of improving the electrical conductivity of the edge of the solar cell, and the like, which will not be described in detail herein.

It should be understood that, when the cross-sectional shapes of the first and second bonding tapes 210 and 220 are triangle, square, trapezoid, oval, etc., the specific size thereof is not limited as long as the cross-sectional area of the first bonding tape 210 is made larger than the cross-sectional area of the second bonding tape 220.

In some embodiments, the number of first bonding pads 210 is a plurality, the number of second bonding pads 220 is a plurality, and the number of second bonding pads 220 is greater than the number of first bonding pads 210.

The number of the second bonding pads 220 may be much larger than the number of the first bonding pads 210. For example, the number of the first solder strips 210 may be two, the number of the second solder strips 220 may be at least four or more, or at least six or more, or at least ten or more, or the like, and the specific number of the first solder strips 210 or the second solder strips 220 is not limited in this embodiment. One of the two first solder strips 210 may be disposed at one side edge of the solar cell 100, the other may be disposed at the other side edge of the solar cell 100, and a plurality of second solder strips 220 may be disposed between the two first solder strips 210.

By adjusting the number of the first bonding strips 210 and the second bonding strips 220, the number of the first bonding strips 210 is reduced, the number of the second bonding strips 220 is increased, and shielding of the first bonding strips 210 on the silicon wafer is reduced, so that the silicon wafer is facilitated to absorb light, and the working efficiency of the photovoltaic cell is facilitated to be improved.

Alternatively, the plurality of first bonding pads 210 may be uniformly distributed at equal intervals.

In some embodiments, the coverage area of the first region 110 is smaller than the coverage area of the second region 120.

Alternatively, the solar cell sheet 100 may be substantially rectangular. The shape of the second region 120 may be square or rectangular, and those skilled in the art will recognize that the shape of the second region 120 may be other shapes, and is not particularly limited herein.

The first region 110 is located outside the second region 120, and the first region 110 may include a first portion and a second portion, which may be located on opposite sides of the second region 120 in the first direction, that is, on both sides of the second region 120. The total area of the first region 110 is smaller than that of the second region 120, which is beneficial to improving the collection and transmission efficiency of the current and improving the working efficiency of the photovoltaic module.

In some embodiments, each of the first solder ribbon 210 and the second solder ribbon 220 includes a solder ribbon body and a coating disposed on an outer surface of the solder ribbon body, where the coating includes any one of tin indium, tin lead bismuth, tin bismuth silver, or tin indium bismuth copper. The material of the coating may be tin indium, tin lead bismuth, tin bismuth silver, tin indium bismuth copper, or the like.

According to the present embodiment, the provided photovoltaic solder strip is applicable to the first solder strip 210 and the second solder strip 220 of different materials such as tin-lead, tin-lead-bismuth, and the like.

In addition, in other embodiments, the materials of the first solder strip 210 and the second solder strip 220 are not limited to the above-mentioned materials, and other materials of the first solder strip 210 and the second solder strip 220 may be adopted in order to meet the requirements of improving the electrical conductivity of the edge of the solar cell, and the like, which will not be described in detail herein.

Optionally, each of the first solder strip 210 and the second solder strip 220 may include a solder strip body and a bending-preventing layer, where the solder strip body includes a middle area and two welding areas, the two welding areas are respectively located at two ends of the solder strip body, and the middle area is located between the two welding areas. The anti-bending layer is arranged on the middle area and is used for preventing the middle area from bending. Therefore, after the adjacent two solar cells are welded through the photovoltaic welding strips, the bending of the partial welding strips between the adjacent two solar cells can be avoided, the appearance of the battery assembly formed by the solar cells is influenced, and the problem that the yield of the photovoltaic assembly is low is solved.

In some embodiments, there is further provided a photovoltaic module, at least two solar cells 100 and a photovoltaic solder strip as described above, wherein two adjacent solar cells 100 are electrically connected by the photovoltaic solder strip.

The photovoltaic module includes at least two solar cells 100, and the specific number of the solar cells is not limited in this embodiment. Through making the both ends of photovoltaic solder strip respectively with two adjacent solar wafer 100 electric connection, can be adjacent two solar wafer 100 electric energy that produces through the photovoltaic effect gather together, can play the effect of electric current conduction.

In some embodiments, the solar cell 100 is any one of a full cell, a half cell, a third cell, or a quarter cell. Of course, it may be two-thirds battery, three-quarters battery, or the like.

The parts of the present utility model not described in detail in the specification are known to those skilled in the art.

The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.

Claims

1. The photovoltaic welding strip is used for connecting a plurality of solar cells and is characterized in that a first area and a second area are arranged on the solar cells, and the first area is arranged on the outer side of the second area and is close to the edge of the solar cells;

2. The photovoltaic solder strip of claim 1 wherein the first solder strip and the second solder strip are each circular in cross section, the first solder strip having a diameter that is greater than the diameter of the second solder strip.

3. The photovoltaic solder strip of claim 2 wherein the first solder strip has a diameter in the range of 0.2mm to 0.5mm;

the diameter of the second welding strip ranges from 0.18mm to 0.3mm.

4. The photovoltaic solder strip of claim 1 wherein the cross-sectional shape of the first and second solder strips comprises a triangle, square, trapezoid, or oval.

5. The photovoltaic solder strip of claim 1, wherein the number of first solder strips is a plurality, the number of second solder strips is a plurality, and the number of second solder strips is greater than the number of first solder strips.

6. The photovoltaic solder strip of claim 1, wherein the footprint of the first region is smaller than the footprint of the second region.

7. The photovoltaic solder strip of any of claims 1-6, wherein the first solder strip and the second solder strip each comprise a solder strip body and a coating disposed on an outer surface of the solder strip body, and wherein the coating comprises any of tin indium, tin lead bismuth, tin bismuth silver, or tin indium bismuth copper.

8. A photovoltaic module characterized in that at least two solar cells and the photovoltaic solder strip according to any one of claims 1-7 are electrically connected by the photovoltaic solder strip between two adjacent solar cells.

9. The photovoltaic module of claim 8, wherein the solar cell is any one of a full cell, a half cell, a third cell, or a quarter cell.