CN215418200U - Solar cell string and photovoltaic module comprising same - Google Patents
Solar cell string and photovoltaic module comprising same Download PDFInfo
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- CN215418200U CN215418200U CN202121735172.5U CN202121735172U CN215418200U CN 215418200 U CN215418200 U CN 215418200U CN 202121735172 U CN202121735172 U CN 202121735172U CN 215418200 U CN215418200 U CN 215418200U
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- solar cell
- cell string
- adhesive film
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- welding
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- 239000002390 adhesive tape Substances 0.000 claims abstract description 59
- 238000003466 welding Methods 0.000 claims abstract description 54
- 239000002313 adhesive film Substances 0.000 claims description 56
- 239000002184 metal Substances 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 32
- 239000011248 coating agent Substances 0.000 claims description 26
- 238000000576 coating method Methods 0.000 claims description 26
- 229910000679 solder Inorganic materials 0.000 claims description 19
- 229910045601 alloy Inorganic materials 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 14
- 238000002834 transmittance Methods 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 239000011247 coating layer Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052709 silver Inorganic materials 0.000 abstract description 8
- 239000004332 silver Substances 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 description 25
- 238000010030 laminating Methods 0.000 description 14
- 238000003475 lamination Methods 0.000 description 10
- 239000010410 layer Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004021 metal welding Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000002998 adhesive polymer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Photovoltaic Devices (AREA)
Abstract
The utility model provides a solar cell string and a photovoltaic module comprising the same. The solar cell string comprises at least two solar cells connected in series, the solar cells are connected in series through welding strips arranged in parallel on the surface, and the welding strips are bonded on the surface of each solar cell through a single-sided transparent adhesive tape. According to the utility model, the welding strip is bonded with the solar cell by the single-sided transparent adhesive tape, so that a welded pad point is replaced, the use amount of silver paste is reduced and the shading loss is reduced when the solar cell string is prepared, and parts of accessories can be changed on the conventional welding machine to prepare the solar cell string.
Description
Technical Field
The utility model belongs to the technical field of solar cells, relates to a solar cell string and a photovoltaic module comprising the solar cell string, and particularly relates to a solar cell string without a main grid and a photovoltaic module comprising the solar cell string.
Background
In the field of a solar cell without a main grid, the thin grid line is completely used for current collection, and the problems of series resistance rise, fill factor reduction and the like are encountered, so that the power of the manufactured assembly is seriously reduced; the series resistance is reduced by screen printing of wider silver paste grid lines, but the cost is increased sharply due to the increase of the silver consumption, and meanwhile, the problems that the insulation effect between P and N is poor and the electric leakage is easy to occur are caused by the wider grid lines.
CN100431175A discloses an electrode comprising a flat surface transparent electrically insulating optical film, an adhesive applied to the flat surface and parallel wires embedded in the adhesive layer, the adhesive having a thickness less than the wire thickness, whereby the protrusions form ohmic contacts with the photovoltaic element.
CN108419433A discloses a polymer conductor plate, a solar cell and a method for producing the same, wherein a homogeneous polymer plate is processed by heat, radiation, chemistry, etc. to form a two-layer or three-layer region, wherein the first region has a low degree of crosslinking or polymerization and is heat adhesive, the second region has a high degree of crosslinking or polymerization and is a support layer, the third layer has a lower degree of crosslinking or polymerization, and a plurality of sets of parallel wires are adhered to the first region to form a polymer plate, thereby forming a cell string.
CN102786882A discloses a platform for manufacturing electrode tapes, which comprises a groove roller, a glue solution device, a curing device and a protective layer pasting device, wherein the conductive tape prepared by the machine platform is embedded with a lead by curing liquid glue.
The three documents mentioned above all mention curing of transparent adhesive film or polymer plate or liquid adhesive, and as the technicians in the field, these three names refer to polymer adhesive film, which is bonded with the conducting wire, and then welded during lamination to achieve electrical contact, however, these three methods must additionally add polymer adhesive film material processing platform, adhesive platform of adhesive film material and conducting wire, etc., which undoubtedly increases the cost and increases the complexity. In addition, the adhesive films, i.e., the bonding layers, provided in the three documents are all the layers of the metal wires far away from the solar cell, and the full coverage is adopted, so that the requirements on the transmittance and the stability are high.
Therefore, how to reduce the usage amount of the silver paste, reduce the shading area of the solar cell, improve the optical gain, and improve the electrical contact performance is a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a solar cell string and a photovoltaic module comprising the same. According to the utility model, the welding strip is bonded with the solar cell by the single-sided transparent adhesive tape, a pad (metal welding spot) point for welding is replaced, the using amount of silver paste is reduced and the shading loss is reduced when the solar cell string is prepared, and partial accessories can be changed on the conventional welding machine to prepare the solar cell string.
In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:
in a first aspect, the utility model provides a solar cell string, which comprises at least two solar cells connected in series, wherein the solar cells are connected in series through welding strips arranged in parallel on the surfaces, and the welding strips are bonded on the surfaces of the solar cells through a single-sided transparent adhesive tape.
The solar cell string provided by the utility model is a string assembly structure formed by connecting a plurality of groups of cells in series through welding strips in an end-to-end manner, the connection mode is that the positive electrode of the previous cell is connected with the negative electrode of the next cell, namely the connection of an alternating positive electrode and a negative electrode, the provided welding strips are leads connected among the cells, the welding strips are sectional welding strips, the length of the welding strips is more than or equal to 2 times of the length of the solar cell, one side of each welding strip is tightly contacted with the front surface of one solar cell, and one side of each welding strip is contacted with the back surface of the adjacent solar cell, and the welding strips are sequentially connected, so that the solar cell string can be formed.
In the present invention, the adhesive tape should have adhesiveness to the solar cell sheet, and it is preferable that the adhesive tape should have adhesiveness to the solder ribbon as well as to the solar cell sheet, and the position of the adhesive tape is not particularly limited as long as the solder ribbon and the solar cell sheet can be tightly adhered to each other.
In the present invention, the tape-shaped adhesive tape does not affect the light absorption of the battery, and therefore, the tape-shaped adhesive tape may be a conductive adhesive tape or a non-conductive adhesive tape in order to have a transparent property and to have no specific requirement on the conductivity of the tape.
According to the utility model, the welding strip and the solar cell are bonded and fixed by the single-sided transparent adhesive tape, the original welding pad point is replaced, the silver paste consumption is reduced, the shading loss is reduced, partial accessories can be changed on the existing welding machine to prepare the solar cell, the adhesive tape is not required to be positioned above the welding strip, and the position relation among the adhesive tape, the welding strip and the grid line is not required to be considered.
In a preferred embodiment of the present invention, the solar cell has a side length d, and d is in a range of 150 to 300mm, for example, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, or 300mm, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned value range are also applicable.
In a preferred embodiment of the present invention, the width of the single-sided transparent adhesive tape is 0.1 to d, for example, 0.1mm, 1mm, 5mm, 10mm, 20mm, 30mm, 50mm, 100mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, or 300mm, but the present invention is not limited to the above-mentioned values, and other values not listed in the above-mentioned range of values are also applicable.
As a preferable technical solution of the present invention, the single-sided scotch tape is disposed in a direction perpendicular to a parallel direction of the solder strips.
In a preferred embodiment of the present invention, the one-sided transparent adhesive tape has a transmittance of 50% or more, for example, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable.
In a preferred embodiment of the present invention, the number of the single-sided scotch tapes is not less than 1, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned value range are also applicable.
The number of the double-sided transparent tape-shaped adhesive tapes refers to the number of the adhesive tapes in each solar cell piece in the solar cell string, and the number of the adhesive tapes can also be understood as the number of rows or columns of the adhesive tapes on the solar cell pieces. The number of the adhesive tapes is matched with the width of the adhesive tapes, the width is narrow, and the adhesive tapes can be arranged in a large number of adaptability.
In the utility model, the number of the single-sided transparent adhesive tapes is adjusted according to the width and the number of the welding strips.
In a preferred embodiment of the present invention, the number of the solder strips is not less than 3, for example, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
In the utility model, the number of the welding strips is the number of the welding strips on each cell, the number of the welding strips on each cell is closely related to the diameter of the welding strips, and can be adjusted adaptively according to actual conditions, in order to not increase series resistance, the number of the wires is inversely related to the size, the thinner the wires are, the more the number of the wires is, if the number of the wires is less than 3, the longer the transmission distance of the photo-generated current on the fine grid is, and the serious power loss is caused.
As a preferable technical scheme of the utility model, the welding strip comprises a metal wire and a coating layer coated on the surface of the metal wire.
In a preferred embodiment of the present invention, the metal wire has a diameter of 0.1 to 400 μm, for example, 0.1 μm, 1 μm, 10 μm, 20 μm, 50 μm, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, or 400 μm, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
In a preferred embodiment of the present invention, the diameter of the metal wire is 100 to 300 μm, for example, 100 μm, 150 μm, 200 μm, 250 μm, or 300 μm, but the metal wire is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
As a preferred technical solution of the present invention, the metal wire is a copper wire.
In a preferred embodiment of the present invention, the thickness of the coating layer is 0.1 to 50 μm, for example, 0.1 μm, 1 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm or 50 μm, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
As a preferred embodiment of the present invention, the coating comprises a single metal coating or an alloy coating.
In a preferred embodiment of the present invention, the alloy coating has a melting point of 50 to 200 ℃, for example, 50 ℃, 100 ℃, 150 ℃ or 200 ℃, but the melting point is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable.
Further, as a preferable embodiment of the present invention, the melting point of the alloy coating layer is 100 to 160 ℃, for example, 100 ℃, 110 ℃, 120 ℃, 130 ℃, 140 ℃, 150 ℃, or 160 ℃, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
According to the utility model, the melting point of the alloy coating is within the range of 100-160 ℃, so that the solar cell string is more favorably applied to a subsequent photovoltaic module, because the temperature is matched with the laminating temperature during the preparation of the photovoltaic module, the low-temperature alloy coating is melted in the laminating process, flows downwards along the lead and is converged at the grid line of the solar cell, and the welding cooling is realized.
In a second aspect, the utility model provides a photovoltaic module, which includes a first glass, a first adhesive film, the solar cell string according to the first aspect, a second adhesive film, and a second glass, which are sequentially stacked.
As a preferred embodiment of the present invention, a third adhesive film is disposed between the first adhesive film and the solar cell string of the first aspect.
As a preferred embodiment of the present invention, a fourth adhesive film is disposed between the solar cell string and the second adhesive film according to the first aspect.
In a preferred embodiment of the present invention, the third adhesive film and the fourth adhesive film have a thickness of 0.1 to 100 μm, such as 0.1 μm, 1 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, or 100 μm, respectively.
In the utility model, a new adhesive film is further added on the basis of the original adhesive film, the purpose of covering is to avoid the direct contact between the battery and the first and second adhesive films, and meanwhile, the third and fourth adhesive films are thinner, so that the first and second adhesive films are not prevented from filling gaps, and the electrical contact can also be improved, because the first and second adhesive films have strong fluidity at the laminating temperature, but the adhesive films are not limited to the values listed, and other values not listed in the numerical value range are also applicable.
Illustratively, the present invention provides a method of manufacturing a solar cell string according to the first aspect, the method comprising:
placing the solder strips on the surfaces of the solar cells in parallel, fixing the solder strips and the solar cells by using a single-sided transparent adhesive tape from the upper part of the solder strips, and connecting the solar cells in series through the solder strips to obtain the solar cell string; and after the single-sided transparent adhesive tape is placed above the welding strip, pressing or applying hot air to the single-sided transparent adhesive tape.
The preparation method provided by the utility model is simple and quick, does not need to fix the adhesive film and the welding strip together in advance, is compatible with the conventional stringer, and greatly simplifies the preparation process.
In the utility model, the adhesive tape, the cell and the solder strip can be in close contact by pressing or applying hot air to the single-sided transparent adhesive tape, and the close contact is physically close contact.
Illustratively, the present invention also provides a method of producing a photovoltaic module according to the second aspect, the method comprising:
and laminating the first glass, the first adhesive film, the solar cell string according to the first aspect, the second adhesive film and the second glass at a laminating temperature of 120-180 ℃ after sequentially laminating to obtain the photovoltaic module.
According to the photovoltaic module provided by the utility model, the battery welding strip and the battery are fixed through the strip-shaped adhesive tape before lamination, and the strip-shaped adhesive tape and the adhesive film (EVA) are completely fused together after lamination, so that an obvious difference cannot be seen; after the lamination, through high temperature, the low temperature alloy on welding the surface melts, flows down along the copper line, adsorbs on the solar cell metal grid line, realizes the welding, realizes ohmic contact after the welding, has accomplished the welding of metal wire with solar cell grid line electrode among the lamination process promptly, if there is M with welding the area, N with the battery grid line, then total M N welding point is far away from present welding point, has improved current transmission's reliability.
The laminating temperature is 120 to 180 ℃, for example, 120 ℃, 130 ℃, 140 ℃, 150 ℃, 160 ℃, 170 ℃ or 180 ℃, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
The preparation method of the photovoltaic module further comprises the following steps:
and laminating the first glass, the first adhesive film, the third adhesive film, the solar cell string according to the first aspect, the fourth adhesive film, the second adhesive film and the second glass in sequence to obtain the photovoltaic module.
In a preferred embodiment of the present invention, the transparency of the one-sided transparent adhesive tape after lamination is 80% or more, for example, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, or 98%, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range of values are also applicable.
In the utility model, the transmittance of the laminated adhesive tape is required to be more than or equal to 80%, so that sunlight incident on the adhesive tape can also penetrate through the adhesive tape to enter the solar cell for power generation, and no additional shading effect is introduced. .
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, the welding strip is bonded with the solar cell by the single-sided transparent adhesive tape, a welded pad point is replaced, the use amount of silver paste is reduced and the shading loss is reduced when the solar cell string is prepared, and partial accessories can be changed on the conventional welding machine to prepare the solar cell string.
Drawings
Fig. 1 is a schematic structural diagram of a single solar cell in a solar cell string according to an embodiment.
Fig. 2 is a partial schematic illustration of a side view of a solar cell string provided in an embodiment.
Fig. 3 is a schematic structural diagram of a solar cell string according to an embodiment.
1-solar cell, 2-solder strip and 3-single-side transparent adhesive tape.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, wherein like or similar reference numerals refer to like or similar parts or parts having like or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "mounted" are to be construed broadly, e.g., as meaning both connected and disconnectable, mechanically and electrically, directly or indirectly via intermediate media, whether internal or external to the elements, or in any other relationship between the elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
In a first embodiment, the utility model provides a solar cell string (as shown in fig. 3) and a preparation method thereof, as shown in fig. 1, the solar cell string comprises at least two solar cell sheets 1 connected in series, the solar cell sheets 1 are connected in series through solder strips 2 arranged in parallel on the surfaces, and the solder strips 2 are bonded on the surfaces of the solar cell sheets 1 through single-sided transparent adhesive tapes 3 (as shown in fig. 2).
The side length of the solar cell piece 1 is d, and the range of d is 150-300 mm;
the width of the single-sided transparent adhesive tape 3 is 0.1-d, the arrangement direction of the single-sided transparent adhesive tape 3 is vertical to the parallel direction of the welding strips 2, and the number of the single-sided transparent adhesive tape 3 is more than or equal to 1.
The number of the welding strips 2 is more than or equal to 3; the welding strip 2 comprises a metal wire and a coating layer coated on the surface of the metal wire; the diameter of the metal wire is 0.1-400 μm, and further 100-300 μm can be selected; the thickness of the coating is 0.1-50 μm; the metal wire comprises a copper wire; the coating comprises a single metal coating and/or an alloy coating; the melting point of the alloy coating is 50-200 ℃, and further 100-160 ℃ can be selected.
The specific embodiment also provides a preparation method of the solar cell string, and the preparation method comprises the following steps:
placing the solder strips 2 on the surface of the solar cell piece 1 in parallel, fixing the solder strips 2 and the solar cell piece 1 from the upper part of the solder strips 2 by using a single-sided transparent adhesive tape 3, and connecting the solar cell pieces 1 in series through the solder strips 2 to obtain a solar cell string; after the single-sided scotch tape 3 is placed over the solder tape 2, the single-sided scotch tape 3 is pressed or heated.
In another embodiment, the utility model further provides a photovoltaic module and a preparation method thereof, wherein the photovoltaic module comprises a first glass, a first adhesive film, the solar cell string provided by the above embodiment, a second adhesive film and a second glass which are sequentially stacked.
A third adhesive film is arranged between the first adhesive film and the solar cell string provided by the above embodiment; a fourth adhesive film is arranged between the solar cell string and the second adhesive film; the thickness of the third adhesive film and the thickness of the fourth adhesive film are 0.1-100 μm respectively.
The preparation method comprises the following steps:
laminating the first glass, the first adhesive film, the solar cell string provided by the above embodiment, the second adhesive film and the second glass in sequence to obtain the photovoltaic module; the laminating temperature is 120-180 ℃;
the preparation method of the photovoltaic module further comprises the following steps:
and laminating the first glass, the first adhesive film, the third adhesive film, the solar cell string, the fourth adhesive film, the second adhesive film and the second glass provided by the above embodiment in sequence to obtain the photovoltaic module, wherein after lamination, the transmittance of the single-sided transparent adhesive tape 3 is more than or equal to 80%.
Example 1
The embodiment provides a solar cell string and a preparation method thereof, and based on the solar cell string and the preparation method thereof provided in the specific embodiment, the solar cell string comprises the following steps:
wherein the width of the solar cell piece 1 is 180mm, the width of the single-sided transparent adhesive tape 3 is 10mm, and the transmittance of the single-sided transparent adhesive tape 3 is 60%; the number of the single-sided transparent adhesive tapes 3 between the solar cell sheets 1 is 5;
the number of the welding strips 2 among the solar cells 1 is 24; the welding strip 2 comprises a metal wire and a coating layer coated on the surface of the metal wire; the diameter of the metal wire is 200 μm; the thickness of the coating is 10 μm; the metal wire is a copper wire; the coating is an alloy coating with the melting point of 150 ℃.
The embodiment also provides a photovoltaic module and a preparation method thereof, and based on the photovoltaic module and the preparation method thereof provided in the specific embodiment, the photovoltaic module comprises the following components:
wherein, the thickness of the third adhesive film and the fourth adhesive film is 50 μm, the laminating temperature in the preparation method is 170 ℃, and the transmittance of the single-sided transparent adhesive tape 3 after lamination is 85%.
Example 2
The embodiment provides a solar cell string and a preparation method thereof, and based on the solar cell string and the preparation method thereof provided in the specific embodiment, the solar cell string comprises the following steps:
wherein the width of the solar cell piece 1 is 200mm, the width of the single-sided transparent adhesive tape 3 is 20mm, and the transmittance of the single-sided transparent adhesive tape 3 is 65%; the number of the single-sided transparent adhesive tapes 3 between the solar cell sheets 1 is 3;
the number of the welding strips 2 among the solar cells 1 is 18; the welding strip 2 comprises a metal wire and a coating layer coated on the surface of the metal wire; the diameter of the metal wire is 260 mu m; the thickness of the coating is 15 μm; the metal wire is a copper wire; the coating is an alloy coating with a melting point of 120 ℃.
The embodiment also provides a photovoltaic module and a preparation method thereof, and based on the photovoltaic module and the preparation method thereof provided in the specific embodiment, the photovoltaic module comprises the following components:
wherein, the thickness of the third adhesive film and the fourth adhesive film is 75 μm, the laminating temperature in the preparation method is 150 ℃, and the transmittance of the single-sided transparent adhesive tape 3 after lamination is 95%.
Example 3
The embodiment provides a solar cell string and a preparation method thereof, and based on the solar cell string and the preparation method thereof provided in the specific embodiment, the solar cell string comprises the following steps:
wherein the width of the solar cell piece 1 is 150mm, the width of the single-sided transparent adhesive tape 3 is 5mm, and the transmittance of the single-sided transparent adhesive tape 3 is 75%; the number of the single-sided transparent adhesive tapes 3 between the solar cell sheets 1 is 8;
the number of the welding strips 2 among the solar cells 1 is 30; the welding strip 2 comprises a metal wire and a coating layer coated on the surface of the metal wire; the diameter of the metal wire is 140 μm; the thickness of the coating is 5 μm; the metal wire is a copper wire; the coating is an alloy coating with a melting point of 130 ℃.
The embodiment also provides a photovoltaic module and a preparation method thereof, and based on the photovoltaic module and the preparation method thereof provided in the specific embodiment, the photovoltaic module comprises the following components:
wherein the thickness of the third adhesive film and the fourth adhesive film is 100 μm, the laminating temperature in the preparation method is 155 ℃, and the transmittance of the single-sided transparent adhesive tape after lamination is 97%.
According to the utility model, the welding strip is bonded with the solar cell by the single-sided transparent adhesive tape, a welded pad point is replaced, the use amount of silver paste is reduced and the shading loss is reduced when the solar cell string is prepared, and partial accessories can be changed on the conventional welding machine to prepare the solar cell string.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The solar cell string is characterized by comprising at least two solar cells connected in series, wherein the solar cells are connected in series through welding strips arranged in parallel on the surface, and the welding strips are bonded on the surface of each solar cell through a single-sided transparent adhesive tape.
2. The solar cell string according to claim 1, wherein the side length of the solar cell sheet is d, and d is in a range of 150-300 mm;
the width of the single-sided transparent adhesive tape is 0.1-d.
3. The solar cell string according to claim 1, wherein the single-sided scotch tape is disposed in a direction perpendicular to a parallel direction of the solder strips.
4. The solar cell string according to claim 1, wherein the transmittance of the single-sided scotch tape is greater than or equal to 50%;
the number of the single-sided transparent adhesive tapes is more than or equal to 1;
the number of the welding strips is more than or equal to 3.
5. The solar cell string according to claim 1, wherein the solder ribbon comprises a metal wire and a coating layer covering the surface of the metal wire.
6. The solar cell string according to claim 5, wherein the metal wire has a diameter of 0.1 to 400 μm.
7. The solar cell string according to claim 6, wherein the metal wire has a diameter of 100 to 300 μm;
the metal wire is a copper wire.
8. The solar cell string according to claim 5, wherein the coating has a thickness of 0.1 to 50 μm;
the coating comprises a single metal coating or an alloy coating;
the melting point of the alloy coating is 50-200 ℃;
the melting point of the alloy coating is 100-160 ℃.
9. A photovoltaic module, characterized in that the photovoltaic module comprises a first glass, a first adhesive film, the solar cell string according to any one of claims 1 to 8, a second adhesive film and a second glass, which are sequentially stacked.
10. The photovoltaic module of claim 9, wherein a third adhesive film is disposed between the first adhesive film and the solar cell string of any one of claims 1-8;
a fourth adhesive film is arranged between the solar cell string as claimed in any one of claims 1 to 8 and the second adhesive film;
the thickness of the third adhesive film and the thickness of the fourth adhesive film are respectively 0.1-100 mu m.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116072753A (en) * | 2023-01-16 | 2023-05-05 | 浙江晶科能源有限公司 | Photovoltaic module and preparation method |
| CN116565068A (en) * | 2023-07-10 | 2023-08-08 | 苏州智慧谷激光智能装备有限公司 | Rubberizing method and rubberizing device for battery strings |
| CN117936647A (en) * | 2024-01-26 | 2024-04-26 | 江苏海博瑞光伏科技有限公司 | Preparation method of solar cell string and photovoltaic module |
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- 2021-07-28 CN CN202121735172.5U patent/CN215418200U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116072753A (en) * | 2023-01-16 | 2023-05-05 | 浙江晶科能源有限公司 | Photovoltaic module and preparation method |
| CN116072753B (en) * | 2023-01-16 | 2024-05-10 | 浙江晶科能源有限公司 | Photovoltaic module and preparation method |
| CN116565068A (en) * | 2023-07-10 | 2023-08-08 | 苏州智慧谷激光智能装备有限公司 | Rubberizing method and rubberizing device for battery strings |
| CN116565068B (en) * | 2023-07-10 | 2023-09-26 | 苏州智慧谷激光智能装备有限公司 | Rubberizing method and rubberizing device for battery strings |
| CN117936647A (en) * | 2024-01-26 | 2024-04-26 | 江苏海博瑞光伏科技有限公司 | Preparation method of solar cell string and photovoltaic module |
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Effective date of registration: 20230802 Address after: 213031 Tianhe PV Industrial Park No. 2, Xinbei District, Changzhou, Jiangsu Patentee after: TRINASOLAR Co.,Ltd. Patentee after: TRINA SOLAR( CHANGZHOU) TECHNOLOGY Co.,Ltd. Address before: 213031 Tianhe PV Industrial Park No. 2, Xinbei District, Changzhou, Jiangsu Patentee before: TRINASOLAR Co.,Ltd. |