CN217822833U - Solder strip and solar cell module - Google Patents
Solder strip and solar cell module Download PDFInfo
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- CN217822833U CN217822833U CN202221547160.4U CN202221547160U CN217822833U CN 217822833 U CN217822833 U CN 217822833U CN 202221547160 U CN202221547160 U CN 202221547160U CN 217822833 U CN217822833 U CN 217822833U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
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Abstract
The utility model provides a weld area and solar module. The solder strip is suitable for series connection of solar cells and comprises: and the bonding part is positioned at the bottom of the welding strip and can be locally bonded and connected with the solar cell. And the reflecting part is arranged above the bonding part, is provided with a circular protruding part protruding from the bonding part and can reflect incident light rays to the solar cell piece through the circular protruding part. The utility model provides a weld area, through the reflection part that sets up bonding portion and specific shape to solve the not good problem that leads to the subassembly power unsatisfactory of solar module light utilization rate.
Description
Technical Field
The utility model relates to a solar cell technical field, concretely relates to weld area and solar module.
Background
The solar cell has the advantages of cleanness, no pollution, reproducibility, stable working performance and the like. Solar cells, also known as photovoltaic cells, utilize the photovoltaic effect of a semiconductor interface to convert the energy of sunlight directly into electrical energy. In the conversion process, the light is absorbed to generate electron-hole pairs, and the electron-hole pairs are separated or diffused to realize the transmission of the generated current. Solar cells are classified into different types according to the structure and the process of the fabrication process. The solar cell with crystalline silicon as a substrate is characterized in that a semiconductor layer and electrodes are prepared on one side or two sides of the substrate to form cell pieces, then a plurality of cell pieces are welded to be connected in series or in parallel, then the cell pieces are packaged to form a component, and the component is fed back to a power grid through an inverter after power generation.
In the prior art, a solder strip is firstly bonded to a main line or a solder point of a solar cell by an adhesive, and then a plurality of solar cells are connected in series by a soldering process to form a solar cell string. In the working process of the assembly, incident light irradiates the welding strip and is directly reflected out, or returns to the surface of the solar cell after being reflected for multiple times by structures such as cover plate glass and the like, so that the utilization rate of the light is poor, and the power of the assembly is reduced.
Therefore, a solution to the problem of power reduction of solar cell modules due to poor light utilization is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solder strip, through the reflection part that sets up bonding portion and specific shape to solve the not good problem that leads to the subassembly power unsatisfactory of solar module light utilization rate.
The utility model provides a solder strip is suitable for solar wafer series connection, include: the bonding part is positioned at the bottom of the welding strip and can be locally bonded and connected with the solar cell piece; the reflecting part is arranged above the bonding part; the reflecting part is provided with a circular protruding part protruding towards the bonding part, and can reflect incident light rays to the solar cell piece through the circular protruding part; and the soldering tin layer is coated on the outer side surfaces of the bonding part and the reflecting part.
Optionally, the thickness of the soldering tin layer is 10-35 μm; the melting point of the soldering tin layer is 150-180 ℃.
Optionally, the material of the solder layer comprises a tin alloy; the tin alloy includes an alloy of tin and at least one of lead, bismuth and silver.
Optionally, the tin alloy includes one of SnBi, snPb, snPbBi, and SnBiAg.
Optionally, the bonding portion has a waist portion facing and connected to the reflection portion, and a side portion of the waist portion is in a slope shape.
Optionally, the section of the waist part perpendicular to the length direction of the welding strip is trapezoidal, and the bottom angle of the trapezoid is 10-45 degrees.
Optionally, the surface of the bonding part on the side opposite to the reflection part is a bonding surface, and the bonding surface is wavy.
Optionally, the wavy bonding surface has a plurality of parallel grooves along the length direction of the solder strip; the bottom of the groove is in a sharp angle shape or an arc shape or a plane.
Optionally, the height of the groove is 0.2mm-0.5mm; the width of the groove is 0.3-0.8mm.
The utility model also provides a solar module, include: the above-mentioned solder strip; the solar battery pack comprises a solar battery string formed by connecting a plurality of solar battery pieces in series through welding strips; the solar cell is connected with the welding strip through the bonding glue.
Optionally, the solar cell further comprises a first packaging layer, wherein the first packaging layer is located on one side of the solar cell; the first adhesive layer is positioned on the surface of one side, facing the solar cell set, of the first packaging layer; the second packaging layer is positioned on one side, back to the first packaging layer, of the solar cell set; and the second adhesive layer is positioned on the surface of one side, facing the solar cell set, of the second packaging layer.
The beneficial effects of the utility model reside in that:
the utility model discloses a weld the area, include bonding portion and set up in the reflection part of bonding portion top. The reflecting part is provided with a circular protruding part protruding from the bonding part, incident light can be refracted to the solar cell sheet through the circular protruding part, and the output power of the module is improved. When sunlight directly irradiates the surface of the solder strip, the circular protruding part receives incident light and vertically reflects the incident light to the packaging structure on one side of the solar cell piece, and the incident light is reflected to the solar cell piece through the packaging structure; when sunlight obliquely irradiates the surface of the solder strip, the circular protruding parts can directly reflect the sunlight to the solar cell pieces, so that the power of the module is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 and fig. 2 are schematic structural views of a solder strip according to embodiment 1 of the present invention;
fig. 3 is a schematic view of the light reflected by the solder strip according to embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a solar cell module according to embodiment 2 of the present invention.
Reference numerals:
01-1, a first encapsulation layer; 01-2, a second packaging layer; 02-1, a first glue layer; 02-2, a second glue layer; 03. welding a strip; 05. bonding glue; 03-1, a reflective portion; 03-2, waist; 03-3, a soldering tin layer; 03-4, an adhesive part; 03-5, bonding surface; 04. a solar cell array; alpha, acute bottom angle.
Detailed Description
The utility model provides a weld area and solar module, through the reflection part that sets up bonding portion and specific shape to solve and weld the problem that area and solar wafer adhesion force are very little and subassembly power is low.
The utility model provides a solder strip is suitable for solar wafer series connection, include:
the bonding part is positioned at the bottom of the welding strip and can be locally bonded and connected with the solar cell; the reflecting part is arranged above the bonding part; the reflecting part is provided with a circular protruding part protruding back to the bonding part; incident light can be refracted to the solar cell through the circular protruding part; and the soldering tin layer is coated on the outer side surfaces of the bonding part and the reflecting part.
The utility model also provides a solar module, include: the utility model provides a welding strip; the solar cell group comprises a plurality of solar cells which are connected in series through welding strips to form a solar cell string; the solar cell is connected with the welding strip through bonding glue. Further comprising: the first packaging layer is positioned on one side of the solar battery pack; the first adhesive layer is positioned on the surface of one side, facing the solar cell pack, of the first packaging layer; the second packaging layer is positioned on one side, back to the first packaging layer, of the solar cell set; and the second adhesive layer is positioned on the surface of one side, facing the solar cell set, of the second packaging layer.
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
Referring to fig. 1 to 3, the present embodiment provides a solder ribbon suitable for connecting solar cells in series. Referring to fig. 1, the solder strip includes:
and the bonding part 03-4 is positioned at the bottom of the solder strip and can be locally bonded and connected with the solar cell slice 04, and the bonding glue 05 is embedded at the bottom of the solder strip.
And the reflecting part 03-1 is arranged above the bonding part 03-4, the reflecting part 03-1 is provided with a circular protruding part protruding away from the bonding part, and incident light is refracted onto the solar cell sheet 04 through the circular protruding part. The light path diagram of the reflection portion 03-1 can be referred to fig. 3.
The solder layer 03-3, the solder layer 03-3 is coated on the outer surface of the adhesive portion 03-4 and the reflective portion 03-1.
Since the reflecting part 03-1 is provided with the circular protruding part protruding from the bonding part, incident light can be refracted to the solar cell sheet through the circular protruding part, and the output power of the module is improved. Referring to fig. 3, when sunlight is directly incident on the solder strip surface, the circular protruding portion receives incident light a, reflects reflected light B to the packaging structure on the incident light side of the solar cell, and reflects the reflected light B to the solar cell 04 through the packaging structure; when sunlight obliquely irradiates on the surface of the solder strip, the circular protruding parts can directly reflect the incident light A to form reflected light B to irradiate the solar cell sheet 04, so that the power of the assembly is improved.
Specifically, in the embodiment, the thickness of the solder layer is 10 μm to 35 μm; the melting point is 150 ℃ to 180 ℃, and may be, for example, 150 ℃, 160 ℃, 170 ℃ or 180 ℃. The material of the soldering tin layer comprises tin alloy; the tin alloy includes an alloy of tin and at least one of lead, bismuth and silver. In some specific embodiments, the tin alloy includes one of SnBi, snPb, snPbBi, snBiAg. The tin alloy can form the alloying of the welding strip and the battery piece before the glue film is melted and crosslinked in the laminating process, so that the separation of the welding strip and the main grid of the battery piece by the glue film is avoided.
In addition, in the prior art, the welding strip is generally connected with the battery piece through the bonding adhesive to form a battery string, in the process of forming the string, in the process of laminating the welding strip and the main grid of the battery piece or a welding point to form alloying, uneven melting of a tin layer of the welding strip is easy to occur, so that the bonding force between the welding strip, the bonding adhesive and the battery piece or between the welding strip and the main grid of the battery piece is lower than an ideal value, the power of an assembly is reduced, and the welding strip and the main grid of the battery piece are isolated by the adhesive film.
In the present embodiment, the adhesive portion 03-4 has a waist portion 03-2 facing the reflective portion 03-1 and connected to the reflective portion 03-1, and the side of the waist portion 03-2 has a slope shape.
Specifically, referring to fig. 2, in the present embodiment, a cross section of the waist 03-2 perpendicular to the length direction of the solder strip is a trapezoid, and a bottom angle α of the trapezoid is 10 ° to 45 °.
Therefore, when the solar cell module is laminated, after the materials of the soldering tin layer are melted by high temperature, the melted tin layer flows to the cell main grid along the inclined surface, the area and the thickness of the tin-coated materials on the cell main grid are increased, and the bonding force between the soldering strip and the cell is increased.
Meanwhile, in the solder strip of the embodiment, the surface of the bonding part 03-4, which is opposite to the side of the reflecting part 03-1, is a bonding surface 03-5, and the bonding surface 03-5 is wavy; the wavy bonding surface 03-5 is provided with a plurality of parallel grooves along the length direction of the solder strip. Specifically, the bottom of the trench has a sharp angle shape, an arc shape, or a plane, in this embodiment, the bottom of the trench has a sharp angle shape, and in other embodiments, the bottom of the trench may have other structures such as an arc shape, a plane, or the like. The height of the grooves is 0.2mm to 0.5mm, and may be, for example, 0.2mm, 0.3mm, 0.4mm, or 0.5mm. The width of the groove is 0.3mm to 0.8mm, and may be, for example, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, or 0.8mm. Therefore, the bonding glue 05 can be fully embedded into the groove, the contact area of the bonding glue on the solder strip is increased, and the bonding force among the solder strip 03, the bonding glue 05 and the solar cell piece 04 is increased.
The solder strip of the embodiment is suitable for various solar cells, such as Heterojunction (HJT) cells, PERC cells, HBC cells, IBC cells, TOPCN cells, and the like; moreover, the applicable solar cell can be a main grid cell or a non-main grid cell.
Example 2
Referring to fig. 4, the present embodiment provides a solar cell module, including:
the solar cell set 04 comprises a plurality of solar cell strings formed by connecting solar cells in series; and, the solder strip provided in example 1, the solar cell piece is connected with the solder strip by the adhesive glue.
Referring to fig. 4, in the present embodiment, the solar cell module further includes: the first packaging layer 01-1 is positioned on one side of the solar cell group 04;
the first adhesive layer 02-1 is positioned on the surface of one side, facing the solar cell set 04, of the first packaging layer 01-1;
the second packaging layer 01-2 is positioned on one side, opposite to the first packaging layer 01-1, of the solar cell group 04;
and the second adhesive layer 02-2 is positioned on the surface of one side, facing the solar cell group 04, of the second packaging layer 01-2.
The above-mentioned layer structures are laminated, laminated and the like to form the solar cell module.
The solar cell can be a heterojunction cell (HJT), a PERC cell, an HBC cell, an IBC cell, a TOPCN cell and the like; and, the solar cell sheet may be a main grid cell or a non-main grid cell.
In the solar cell module of fig. 4, the first encapsulant layer 01-1 may be a glass encapsulant cover sheet, or other photovoltaic back sheet; the second packaging layer 01-2 can be a glass packaging cover plate or other photovoltaic back plates; the first adhesive layer 02-1 can be a solid-resistant integrated film or other hot melt adhesive materials; the second adhesive layer 02-2 may be a solid-resistant integrated film or other hot melt adhesive material.
In the solar cell module provided in this embodiment, the solar cell pieces are connected in series by using the solder ribbon provided in embodiment 1. Since the solder strip in embodiment 1 includes the adhesive portion and the reflection portion disposed above the adhesive portion, the reflection portion has a circular protrusion protruding away from the adhesive portion. Incident light can be refracted to the solar cell through the circular protruding portion, and the output power of the assembly is improved. When sunlight directly irradiates the surface of the solder strip, the circular protruding part receives incident light and vertically reflects the incident light to the packaging structure on one side of the solar cell piece, and the incident light is reflected to the solar cell piece through the packaging structure; when sunlight obliquely irradiates the surface of the solder strip, the circular protruding parts can directly reflect the sunlight to the solar cell pieces, so that the power of the solar cell module can be improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (11)
1. A solder strip suitable for series connection of solar cells, comprising:
the bonding part is positioned at the bottom of the welding strip and can be locally bonded and connected with the solar cell;
a reflection part arranged above the bonding part; the reflecting part is provided with a circular protruding part protruding towards the bonding part, and incident light can be refracted to the solar cell sheet through the circular protruding part;
and the soldering tin layer is coated on the outer side surfaces of the bonding part and the reflecting part.
2. Solder strip according to claim 1,
the thickness of the soldering tin layer is 10-35 μm;
the melting point of the soldering tin layer is 150-180 ℃.
3. Solder strip according to claim 1,
the material of the solder layer comprises a tin alloy.
4. The solder strip of claim 3, wherein the tin alloy includes
One of SnBi, snPb, snPbBi and SnBiAg.
5. Solder strip according to claim 1,
the bonding portion has a waist portion facing the reflection portion and connected to the reflection portion, and a side portion of the waist portion is in a slope shape.
6. Solder strip according to claim 5,
the section of the waist part perpendicular to the length direction of the welding strip is trapezoidal, and the bottom angle of the trapezoid is 10-45 degrees.
7. The solder strip according to claim 1, wherein a surface of the bonding portion facing away from the reflection portion is a bonding surface, and the bonding surface is wavy.
8. Solder strip according to claim 7,
the wavy bonding surface is provided with a plurality of parallel grooves along the length direction of the welding strip;
the bottom of the groove is in a sharp angle shape, an arc shape or a plane.
9. Solder strip according to claim 8,
the height of the groove is 0.2mm-0.5mm;
the width of the groove is 0.3mm-0.8mm.
10. A solar cell module, comprising:
the solar cell array comprises a plurality of solar cell strings formed by connecting solar cells in series;
a solder strip as claimed in any one of claims 1 to 9;
the solar cell is connected with the welding strip through bonding glue.
11. The solar cell assembly of claim 10, further comprising:
the first packaging layer is positioned on one side of the solar battery pack;
the first adhesive layer is positioned on the surface of one side, facing the solar cell set, of the first packaging layer;
the second packaging layer is positioned on one side, back to the first packaging layer, of the solar cell set;
and the second adhesive layer is positioned on the surface of one side, facing the solar cell set, of the second packaging layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221547160.4U CN217822833U (en) | 2022-06-17 | 2022-06-17 | Solder strip and solar cell module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221547160.4U CN217822833U (en) | 2022-06-17 | 2022-06-17 | Solder strip and solar cell module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217822833U true CN217822833U (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221547160.4U Active CN217822833U (en) | 2022-06-17 | 2022-06-17 | Solder strip and solar cell module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217822833U (en) |
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2022
- 2022-06-17 CN CN202221547160.4U patent/CN217822833U/en active Active
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