CN114078980A - Packaging layer, photovoltaic cell string and photovoltaic module manufacturing method - Google Patents
Packaging layer, photovoltaic cell string and photovoltaic module manufacturing method Download PDFInfo
- Publication number
- CN114078980A CN114078980A CN202010834480.7A CN202010834480A CN114078980A CN 114078980 A CN114078980 A CN 114078980A CN 202010834480 A CN202010834480 A CN 202010834480A CN 114078980 A CN114078980 A CN 114078980A
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- China
- Prior art keywords
- encapsulation layer
- groove
- packaging layer
- cell sheet
- encapsulation
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000004806 packaging method and process Methods 0.000 title abstract description 48
- 238000003466 welding Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 80
- 238000005538 encapsulation Methods 0.000 claims description 40
- 229910000679 solder Inorganic materials 0.000 claims description 13
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 238000005476 soldering Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 abstract description 7
- 238000005520 cutting process Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 abstract description 4
- 238000010030 laminating Methods 0.000 abstract description 3
- 238000003475 lamination Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 239000008393 encapsulating agent Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
- H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
- H10F19/90—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers
- H10F19/902—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells
- H10F19/904—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers for series or parallel connection of photovoltaic cells characterised by the shapes of the structures
-
- 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
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- Photovoltaic Devices (AREA)
Abstract
The invention provides a packaging layer, a photovoltaic cell string and a photovoltaic module manufacturing method, wherein the photovoltaic module manufacturing method comprises the following steps: providing a first packaging layer, wherein a first bulge part is formed on one side surface of the first packaging layer in the thickness direction; placing a battery string on the first packaging layer, and enabling a gap between two adjacent battery pieces in the battery string to be close to the first bulge; providing a second packaging layer, wherein a second bulge is formed on one side surface of the second packaging layer in the thickness direction, and the second packaging layer is laid on the surface of the battery string, so that the second bulge and the first bulge are respectively positioned on two sides of the gap; and providing pressure perpendicular to the thickness direction of the first packaging layer and the second packaging layer so as to package the battery string between the first packaging layer and the second packaging layer. Compared with the prior art, the invention can counteract the extrusion force of the rubber plate to the battery piece in the laminating process, reduce the shearing acting force between the welding strip and the cutting surface of the battery piece and reduce the risk of hidden cracking of the battery piece.
Description
Technical Field
The invention relates to a packaging layer, a photovoltaic cell string and a photovoltaic module manufacturing method, and belongs to the technical field of photovoltaic module lamination.
Background
With the continuous development of the photovoltaic industry, high power and small size become the mainstream of the new generation. The current photovoltaic industry uses 156 half pieces with small spacing as mainstream products, and the small spacing assembly has the following defects: because the distance between the batteries is reduced, the welding strip needs to be flattened, and even if the welding strip is flattened, the extrusion force between two adjacent battery pieces cannot be eliminated, so that the rubber plate extrudes the assembly in the laminating process, fine cracks appear on the edges of the cutting surfaces of the battery pieces, and the risk of hidden cracks of the battery pieces after lamination is increased.
In view of the above, there is a need for an improvement to existing photovoltaic modules to solve the above problems.
Disclosure of Invention
The invention aims to provide an encapsulating layer, a photovoltaic cell serial and a photovoltaic module manufacturing method, so as to reduce the extrusion force of a rubber plate on the cutting surface of a cell piece during lamination.
In order to achieve the above object, the present invention provides a package layer, which includes a package body and a protrusion portion protruding outward from one side surface of the package body in a thickness direction.
As a further improvement of the invention, the bulge is arranged in a trapezoid shape, and the width of the long side of the trapezoid is 1-2 mm, and the height of the trapezoid is 0.3-0.5 mm.
As a further improvement of the present invention, in the extending direction of the package main body, the convex portion is located at a side of a center line of the package main body.
In order to achieve the above object, the invention further provides a photovoltaic cell string, which includes a plurality of cell pieces arranged in the extending direction, a solder strip connecting two adjacent cell pieces in series, and an encapsulation layer encapsulating and fixing the cell pieces and the solder strip, wherein a protrusion is formed on one side surface in the thickness direction of the encapsulation layer, a groove is correspondingly formed in the solder strip, and the protrusion protrudes into the groove.
As a further improvement of the present invention, the battery piece includes a first battery piece and a second battery piece which are adjacently disposed, the encapsulation layer includes a second encapsulation layer located above the first battery piece and a first encapsulation layer located below the second battery piece, a first protrusion is formed on the first encapsulation layer, a second protrusion is formed on the second encapsulation layer, grooves are respectively concavely formed on the upper wall surface and the lower wall surface of the solder strip, and the first protrusion and the second protrusion respectively protrude into the corresponding grooves.
As a further improvement of the present invention, the groove is close to a gap between the first cell piece and the second cell piece, the first protruding portion and the second protruding portion are respectively located at two sides of the gap, and the width of the groove is greater than the maximum width of the corresponding first protruding portion or second protruding portion.
As a further improvement of the present invention, a groove concavely disposed on the lower wall surface of the soldering belt is defined as a first groove, and a groove concavely disposed on the upper wall surface of the soldering belt is defined as a second groove, the first groove and the second groove are overlapped at a gap between the first battery piece and the second battery piece, and the sum of the widths of the first groove and the second groove is 4-5 mm in the serial connection direction of the first battery piece and the second battery piece.
In order to achieve the above object, the present invention also provides a photovoltaic module manufacturing method, including:
providing a first packaging layer, wherein a first bulge part is formed on one side surface of the first packaging layer in the thickness direction;
placing a battery string on the first packaging layer, and enabling a gap between two adjacent battery pieces in the battery string to be close to the first bulge;
providing a second packaging layer, wherein a second bulge is formed on one side surface of the second packaging layer in the thickness direction, the second packaging layer is laid on the surface of the battery string, and the second bulge and the first bulge are respectively positioned on two sides of the gap;
and providing pressure in a direction perpendicular to the thickness direction of the first packaging layer and the second packaging layer so as to package the battery string between the first packaging layer and the second packaging layer.
As a further improvement of the invention, the height of the first protruding part and the height of the second protruding part are both larger than the thickness of the battery piece.
As a further improvement of the invention, the first packaging layer and the second packaging layer are both EVA glue layers; or, the first packaging layer and the second packaging layer are both POE glue layers.
The invention has the beneficial effects that: according to the invention, the first bulge part is formed on the surface of one side in the thickness direction of the first packaging layer, and the second bulge part is formed on the surface of one side in the thickness direction of the second packaging layer, so that the extrusion force of the rubber plate on the battery piece can be counteracted by using the first bulge part and the second bulge part in the laminating process, the shearing acting force between the welding strip and the cutting surface of the battery piece is reduced, and the risk of hidden cracking of the battery piece is reduced.
Drawings
Fig. 1 is a flow chart of a method of manufacturing a photovoltaic module of the present invention.
Fig. 2 is a schematic structural diagram corresponding to step S1 in fig. 1.
Fig. 3 is a schematic structural diagram corresponding to step S2 in fig. 1.
Fig. 4 is a schematic structural diagram corresponding to step S3 in fig. 1.
Fig. 5 is a schematic view of a photovoltaic module made using the photovoltaic module manufacturing method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 4, the present invention discloses a method for manufacturing a photovoltaic module, which mainly comprises the following steps:
s1, providing a first packaging layer 10, wherein a first bulge part 11 is formed on one side surface of the first packaging layer 10 in the thickness direction;
s2, placing the battery string 20 on the first packaging layer 10, and making the gap 24 between two adjacent battery plates in the battery string 20 close to the first protruding part 11;
s3, providing a second encapsulation layer 30, forming a second protrusion 31 on one side surface of the second encapsulation layer 30 in the thickness direction, laying the second encapsulation layer 30 on the surface of the battery string 20, and enabling the second protrusion 31 and the first protrusion 11 to be located on two sides of the gap 24 respectively;
and S4, providing pressure perpendicular to the thickness direction of the first packaging layer 10 and the second packaging layer 30 to package the battery string 20 between the first packaging layer 10 and the second packaging layer 30.
As shown in fig. 2 to 4, the first package layer 10 includes a first package body 12 and a first protrusion 11 protruding outward from a side surface of the first package body 12 in a thickness direction; the first protruding portion 11 is located on the side of the center line of the first package body 12 in the extending direction of the first package body 12. The second package layer 30 includes a second package body 32 and a second protrusion 31 protruding outward from a side surface of the second package body 32 in the thickness direction, and in the extending direction of the second package body 32, the second protrusion 31 is located beside the center line of the second package body 32.
In other words, the first encapsulation layer 10 and the second encapsulation layer 30 are correspondingly disposed, and the structure and the size of the first encapsulation layer 10 are respectively the same as those of the second encapsulation layer 30. Therefore, when the first packaging layer 10 and the second packaging layer 30 are manufactured, only one packaging layer needs to be manufactured independently to meet the requirement, manufacturing dies are reduced, and manufacturing time and manufacturing cost are saved. When in use, the first packaging layer 10 is directly rotated by 180 degrees to be used as the second packaging layer 30.
The first packaging layer 10 and the second packaging layer 30 are both EVA adhesive layers or POE adhesive layers; of course, other adhesive layers may be used as long as the photovoltaic cell string can be packaged.
In this embodiment, the first protruding portion 11 and the second protruding portion 31 are both in a trapezoidal shape, and the width of the long side of the trapezoid is 1-2 mm, and the height is 0.3-0.5 mm. Of course, in other embodiments, the shape of the first convex portion 11 and the second convex portion 31 may be a cylinder, a semicircle or a triangle, as long as the function of absorbing the pressure is provided. The number of the first convex portions 11 and the second convex portions 31 can be designed according to actual needs, and is not limited herein.
The photovoltaic cell string comprises a plurality of cell pieces arranged in the extending direction of the photovoltaic cell string, a welding strip for connecting two adjacent cell pieces in series, and the packaging layer for packaging and fixing the cell pieces and the welding strip. For example, the battery string 20 includes a first battery piece 21 and a second battery piece 22 which are adjacently arranged, and a welding strip 23 for connecting the first battery piece 21 and the second battery piece 22 in series, wherein the first battery piece 21 and the second battery piece 22 are arranged at an interval left and right in the horizontal direction shown in fig. 3, and are vertically staggered, so that a gap 24 of about 0.7mm is left between the first battery piece 21 and the second battery piece 22, and the welding strip 23 is convenient for connecting in series.
The second packaging layer 30 is located above the first battery piece 21, and the first packaging layer 10 is located below the second battery piece 22. The solder strip 23 comprises a first part 231 connected with the lower surface of the first battery piece 21, a second part 232 connected with the upper surface of the second battery piece 22, and a connecting part 233 passing through the gap 24 and connecting the first part 231 and the second part 232, wherein grooves (not numbered) are respectively formed in the upper wall surface and the lower wall surface of the solder strip 23 in a concave manner, and the first protruding part 11 and the second protruding part 31 respectively protrude into the corresponding grooves.
The first groove 234 and the second groove 235 are defined as a groove recessed in the lower wall surface of the solder strip 23 and a groove recessed in the upper wall surface of the solder strip 23, and the first groove 234 and the second groove 235 are overlapped at the gap 24 between the first battery piece 21 and the second battery piece 22. In other words, the first groove 234 is formed by being recessed upward from the lower surfaces of the first portion 231 and the connecting portion 233 of the solder strip 23, and the second groove 235 is formed by being recessed downward from the upper surfaces of the second portion 232 and the connecting portion 233 of the solder strip 23, so that the connecting portion 233 and the left and right portions of the connecting portion 233 of the solder strip 23 are flat (i.e., the thicknesses of the left and right portions of the connecting portion 233 and the connecting portion 233 are reduced), and the vertical distance (i.e., the distance in the vertical direction) between the first battery piece 21 and the second battery piece 22 is shortened.
The first and second grooves 234 and 235 are disposed adjacent to the gap 24 and on either side of the gap 24. In the horizontal direction shown in fig. 4, the widths of the first and second grooves 234 and 235 are greater than the maximum widths of the corresponding first and second protrusions 11 and 31; in the vertical direction shown in fig. 4, the heights of the first protruding portion 11 and the second protruding portion 31 are both greater than the thicknesses of the first battery piece 21 and the second battery piece 22. The arrangement enables the first protruding portion 11 and the second protruding portion 31 to play a certain supporting role before lamination, and gradually melt and solidify and harden in the lamination process, so that the extrusion force of the rubber plate on the battery piece during lamination is absorbed, the shearing force between the welding strip 23 and the cutting surface of the battery piece is reduced, and the risk of hidden cracking of the battery piece is reduced.
In the serial connection direction (i.e. the horizontal direction shown in fig. 3) of the first battery piece 21 and the second battery piece 22, the sum of the widths of the first groove 234 and the second groove 235 is 4-5 mm, so that the manufacturing accuracy is better.
In the invention, the first lug boss 11 and the second lug boss 31 are regularly arranged and correspond to the flattening part of the welding strip 23, so that better laying precision is achieved; of course, the positions of the first protruding portion 11 and the second protruding portion 31 change with the change of the size of the battery piece, and the positions are only required to be close to the gap 24 of the battery piece, so that the effects of absorbing the extrusion force and reducing the hidden crack risk of the battery piece can be achieved.
As shown in fig. 5, the photovoltaic module manufactured by the method of manufacturing a photovoltaic module of the present invention has few or no subfissure phenomenon of the cell, and meets the main requirements of high power and small size.
In summary, according to the present invention, the first protruding portion 11 is formed on one side surface of the first encapsulant layer 10 in the thickness direction, and the second protruding portion 31 is formed on one side surface of the second encapsulant layer 30 in the thickness direction, so that the first protruding portion 11 and the second protruding portion 31 can play a certain supporting role before lamination, and in the lamination process, the first protruding portion 11 and the second protruding portion 31 gradually melt and solidify and harden, and can counteract the extrusion force of the adhesive tape on the battery piece, reduce the shearing force between the solder strip 23 and the cut surface of the battery piece, and reduce the risk of hidden cracking of the battery piece.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010834480.7A CN114078980B (en) | 2020-08-19 | 2020-08-19 | Photovoltaic cell series and photovoltaic module manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010834480.7A CN114078980B (en) | 2020-08-19 | 2020-08-19 | Photovoltaic cell series and photovoltaic module manufacturing method |
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| Publication Number | Publication Date |
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| CN114078980A true CN114078980A (en) | 2022-02-22 |
| CN114078980B CN114078980B (en) | 2024-11-12 |
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| CN202010834480.7A Active CN114078980B (en) | 2020-08-19 | 2020-08-19 | Photovoltaic cell series and photovoltaic module manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114597275A (en) * | 2022-02-25 | 2022-06-07 | 晶澳(扬州)新能源有限公司 | Solar cell module and its manufacturing method |
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2020
- 2020-08-19 CN CN202010834480.7A patent/CN114078980B/en active Active
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| CN114078980B (en) | 2024-11-12 |
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