CN114583001B - Photovoltaic module and manufacturing method thereof - Google Patents
Photovoltaic module and manufacturing method thereof Download PDFInfo
- Publication number
- CN114583001B CN114583001B CN202011383287.2A CN202011383287A CN114583001B CN 114583001 B CN114583001 B CN 114583001B CN 202011383287 A CN202011383287 A CN 202011383287A CN 114583001 B CN114583001 B CN 114583001B
- Authority
- CN
- China
- Prior art keywords
- battery
- interconnection
- interconnect structure
- battery piece
- photovoltaic module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 47
- 229910052718 tin Inorganic materials 0.000 claims description 41
- 238000010438 heat treatment Methods 0.000 claims description 27
- 229910000679 solder Inorganic materials 0.000 claims description 27
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 19
- 238000005476 soldering Methods 0.000 claims description 19
- 229910052709 silver Inorganic materials 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 6
- 229910052745 lead Inorganic materials 0.000 claims description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 5
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 4
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 abstract description 22
- 239000002313 adhesive film Substances 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 12
- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 238000003475 lamination Methods 0.000 abstract description 8
- 239000005038 ethylene vinyl acetate Substances 0.000 description 9
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 7
- 239000011521 glass Substances 0.000 description 6
- 229920006280 packaging film Polymers 0.000 description 6
- 239000012785 packaging film Substances 0.000 description 6
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 5
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000005341 toughened glass Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- -1 copper-silver-aluminum Chemical compound 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- YCKOAAUKSGOOJH-UHFFFAOYSA-N copper silver Chemical compound [Cu].[Ag].[Ag] YCKOAAUKSGOOJH-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
- H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Sustainable Development (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Sustainable Energy (AREA)
- Manufacturing & Machinery (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a photovoltaic module and a manufacturing method thereof, wherein the manufacturing method of the photovoltaic module comprises the following steps: s1, arranging a first interconnection structural member and a fixing film on the front surface and the back surface of each battery piece to obtain a battery piece unit, wherein the fixing film is positioned on one side of the first interconnection structural member, which is far away from the battery piece; and S2, connecting the first interconnection structural members of the plurality of battery piece units to realize electric connection of the plurality of battery piece units. According to the manufacturing method of the photovoltaic module, on one hand, a plurality of independent battery piece units can be respectively transported to the packaging line and then packaged, so that the first interconnection structural member is prevented from shifting in the transportation process, and the structure of the photovoltaic module such as a heterojunction module is more reliable; on the other hand, the displacement of the battery piece caused by the flowing of the packaging adhesive film in the lamination process can be avoided, and the structural stability of the photovoltaic module can be improved.
Description
Technical Field
The invention relates to the technical field of photovoltaic manufacturing, in particular to a photovoltaic module and a manufacturing method thereof.
Background
In the related art, a photovoltaic module, such as a heterojunction module, generally employs a continuous film coating method to fix a solder strip on a battery piece, and then forms a battery string for packaging. However, when the battery string is carried to the packaging line after being manufactured, the welding strip is connected with the battery piece only by the fixing film, so that the connection force is weak, and the welding strip is easy to shift in the carrying process of the battery string.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a method for manufacturing a photovoltaic module, which can avoid displacement of a first interconnection structure during transportation.
Another object of the present invention is to provide a photovoltaic module manufactured by the above method for manufacturing a photovoltaic module.
The manufacturing method of the photovoltaic module according to the embodiment of the first aspect of the invention comprises the following steps: s1, arranging a first interconnection structural member and a fixing film on the front surface and the back surface of each battery piece to obtain a battery piece unit, wherein the fixing film is positioned on one side of the first interconnection structural member, which is far away from the battery piece; and S2, connecting the first interconnection structural members of the plurality of battery piece units to realize electric connection of the plurality of battery piece units.
According to the manufacturing method of the photovoltaic module, the first interconnection structural parts and the fixing films are arranged on the front surface and the back surface of each battery piece to obtain the battery piece units, and the first interconnection structural parts of the battery piece units are connected to realize the electric connection of the battery piece units, so that on one hand, the independent battery piece units can be respectively transported to the packaging line and then packaged, the first interconnection structural parts are prevented from being shifted in the transportation process, and the structure of the photovoltaic module such as a heterojunction module is more reliable; on the other hand, the displacement of the battery piece caused by the flowing of the packaging adhesive film in the lamination process can be avoided, and the structural stability of the photovoltaic module can be improved.
According to some embodiments of the invention, in step S1, the battery plate has a first end and a second end opposite to each other, the first interconnect structure on the front side of the battery plate unit extends beyond the first end of the battery plate, and the first interconnect structure on the back side of the battery plate unit extends beyond the second end of the battery plate.
According to some embodiments of the invention, the first interconnect structure comprises a first interconnect structure section and a second interconnect structure section connected to each other in a length direction, the first interconnect structure section being provided on the front or back of the battery sheet, the second interconnect structure section protruding beyond the corresponding first or second end of the battery sheet, the second interconnect structure section being of a different shape and/or size than the first interconnect structure section.
According to some embodiments of the invention, the first interconnect structure segment has a circular or polygonal cross-sectional shape and the second interconnect structure segment has a rectangular cross-sectional shape.
According to some embodiments of the invention, the first interconnect structure segment has a circular cross-sectional shape and the first interconnect structure segment has a diameter d, wherein d satisfies: d is more than or equal to 0.1mm and less than or equal to 0.5mm.
According to some embodiments of the invention, the second interconnect structure section is flat, and the second interconnect structure section has a thickness t 1 The length of the second interconnect structure segment in the length direction of the first interconnect structure segment is L, wherein the t 1 L respectively satisfies the following conditions: t is less than or equal to 0.05mm 1 ≤0.5mm，0.5mm≤L≤5mm。
According to some embodiments of the invention, step S1 specifically comprises: the fixing film, the first interconnection structural member, the battery piece, the first interconnection structural member and the fixing film are sequentially placed from bottom to top to obtain a prefabricated battery piece; and heating the prefabricated battery piece to obtain the battery piece unit.
According to some embodiments of the invention, the heating temperature for heating the prefabricated battery piece is T 1 Wherein the T is 1 The method meets the following conditions: t at 60℃ or less 1 ≤110℃。
According to some embodiments of the invention, the heating time for heating the prefabricated battery piece is t, wherein t satisfies: t is more than or equal to 0.5S and less than or equal to 50S.
According to some embodiments of the invention, in each of the battery cells, a width of the fixing film in a length direction of the first interconnect structure is smaller than a length of the battery in the length direction of the first interconnect structure.
According to some embodiments of the invention, step S2 specifically comprises: and S21, connecting a plurality of battery sheet units in series to obtain a battery string, wherein the first interconnection structural part of the front surface of one of the two adjacent battery sheet units of the battery string is connected with the first interconnection structural part of the back surface of the other of the two adjacent battery sheet units.
According to some embodiments of the invention, the first interconnecting structural members of two adjacent battery cells of each battery string are lap-connected.
According to some embodiments of the invention, after step S21, further comprising: and S22, connecting the first interconnection structural members at the same end of two adjacent battery strings in parallel through a second interconnection structural member, wherein the second interconnection structural member is connected with the first interconnection structural members of two adjacent battery strings, which are positioned on one of the front surface and the back surface.
According to some embodiments of the invention, the first interconnection structures of two adjacent battery cells are welded together, and the welding temperature of the first interconnection structures of two adjacent battery cells is T 2 Wherein the T is 2 The method meets the following conditions: t at 110℃ or less 2 ≤160℃。
According to some embodiments of the invention, each of the first interconnecting structural members comprises: a conductive substrate; a solder layer covering at least a portion of an outer surface of the conductive substrate, the solder layer being composed of Sn and Bi; or the soldering tin layer is composed of Sn and Ag; or the soldering tin layer consists of Sn, bi and Ag; or the soldering tin layer consists of Sn, bi and Pb; or the soldering tin layer is composed of Sn, pb and Ag.
According to some embodiments of the invention, when the solder layer is composed of Sn, bi, and Pb, the Bi content is 5% to 40%; when the soldering tin layer consists of Sn, pb and Ag, the content of the Ag is 1-40%.
According to some embodiments of the invention, the melting point of the solder layer is T 3 Wherein said T is 3 The method meets the following conditions: t at 110℃ or less 3 ≤170℃。
According to some embodiments of the invention, the thickness of the fixing filmAt t 2 Wherein said t 2 The method meets the following conditions: t is less than or equal to 0.05mm 2 ≤1mm。
According to some embodiments of the invention, the fixing film is an EVA piece, POE piece, TPU piece, or a composite piece of EVA, PET and PMMA.
The photovoltaic module according to the embodiment of the second aspect of the present invention is manufactured by the manufacturing method of the photovoltaic module according to the embodiment of the first aspect of the present invention.
Additional aspects and advantages of the invention 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 invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a flow chart of a method for manufacturing a photovoltaic module according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a first interconnecting structure according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a first plurality of interconnecting structural members according to an embodiment of the present invention;
fig. 4 is a partial structural schematic view of a battery cell according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional structure of a battery cell according to an embodiment of the present invention;
fig. 6 is a schematic side view of a battery cell according to an embodiment of the present invention;
FIG. 7 is a schematic connection diagram of a plurality of battery cells according to an embodiment of the invention;
FIG. 8 is a schematic view of a partial front structure of a photovoltaic module according to an embodiment of the present invention;
fig. 9 is a schematic front view of a photovoltaic module according to an embodiment of the present invention;
fig. 10 is a schematic side structural view of a photovoltaic module according to an embodiment of the present invention.
Reference numerals:
100: a photovoltaic module;
1: a battery sheet; 2: a first interconnecting structural member; 21: a first interconnect structure segment;
22: a second interconnect structure segment; 3: a fixing film; 4: a battery cell unit;
5: a battery string; 6: a second interconnecting structural member; 7: glass;
8: packaging the adhesive film on the front surface; 9: packaging the adhesive film on the back; 10: a back plate.
Detailed Description
Embodiments of the present invention will be described in detail below, by way of example with reference to the accompanying drawings.
A method of fabricating a photovoltaic module 100 according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1-10. The method for manufacturing the photovoltaic module 100 may be used to manufacture a photovoltaic module 100 such as a heterojunction (a special PN junction formed by sequentially depositing two or more layers of different semiconductor material films having different energy bandgaps, which may be a compound such as gallium arsenide or a semiconductor alloy such as silicon-germanium) module. In the following description of the present application, a method for manufacturing the photovoltaic module 100 is described as an example for manufacturing the heterojunction module. Of course, those skilled in the art will appreciate that the method of fabricating the photovoltaic module 100 may also be used to fabricate other types of photovoltaic modules 100, and is not limited to heterojunction modules.
As shown in fig. 1, 5 and 7, the method for manufacturing a photovoltaic module 100 according to the embodiment of the first aspect of the present invention includes the following steps:
s1, a first interconnection structure 2 and a fixing film 3 are disposed on the front and the back of each cell 1 to obtain a cell unit 4, and the fixing film 3 is located on the side of the first interconnection structure 2 away from the cell 1. In this step, the dimensions of the first interconnect structure 2 and the fixing film 3 may be matched to the dimensions of the corresponding battery sheet 1. For example, in the example of fig. 5, the length of the first interconnection structure 2 may be substantially equal to the length of the corresponding individual battery piece 1 (for example, may be 50mm to 220 mm), and the area of the fixing film 3 may be substantially equal to the area of the corresponding individual battery piece 1 (for example, the width of the fixing film 3 may be 50mm to 220mm, and the length may be 50mm to 220 mm). Thus, by this step, a plurality of independent battery cells 4 can be obtained, and when the photovoltaic module 100, for example, a heterojunction module is manufactured, the plurality of independent battery cells 4 can be transported to the packaging line and packaged, and compared with the conventional method of forming a battery string and packaging, the displacement can be avoided during transportation, and the structure of the photovoltaic module 100, for example, a heterojunction module is more reliable.
And S2, connecting the first interconnection structural members 2 of the plurality of battery cells 4 to realize the electrical connection of the plurality of battery cells 4. In the description of the present invention, "plurality" means two or more. For example, when manufacturing the photovoltaic module 100, such as a heterojunction module, a plurality of the battery cells 4 may be first placed on the packaging adhesive film according to the circuit layout design of the heterojunction module, and then the first interconnection structures 2 of the adjacent two battery cells 4 may be connected to each other. Therefore, through the step S2, the adjacent two battery piece units 4 can be firmly connected, and the battery piece 1 is prevented from being shifted due to the flowing of the packaging adhesive film in the lamination process.
According to the manufacturing method of the photovoltaic module 100 in the embodiment of the invention, the first interconnection structural member 2 and the fixing film 3 are arranged on the front surface and the back surface of each cell piece 1 to obtain the cell piece unit 4, and the first interconnection structural members 2 of the cell piece units 4 are connected to realize the electric connection of the cell piece units 4, on one hand, the independent cell piece units 4 can be respectively transported to the packaging line and then packaged, so that the first interconnection structural member 2 is prevented from shifting in the transportation process, and the structure of the photovoltaic module 100 such as a heterojunction module is more reliable; on the other hand, the displacement of the battery sheet 1 due to the flow of the encapsulation adhesive film during lamination can be avoided, and the structural stability of the photovoltaic module 100 can be improved.
In some alternative embodiments of the present invention, referring to fig. 5 and 7, in step S1, the battery sheet 1 has a first end and a second end opposite to each other, the first interconnection structure 2 located at the front side of the battery sheet unit 4 protrudes from the first end of the battery sheet 1, and the first interconnection structure 2 located at the rear side of the battery sheet unit 4 protrudes from the second end of the battery sheet 1.
For example, the adjacent two battery cells 4 may be a first battery cell and a second battery cell, the first end of the battery cell 1 of the first battery cell and the second end of the battery cell 1 of the second battery cell being opposite to each other. When the first interconnection structures 2 of two adjacent battery cells 4 are connected to each other, the first interconnection structure 2 on the front side of the first battery cell and the first interconnection structure 2 on the back side of the second battery cell are connected to each other, and the first interconnection structure 2 on the front side of the first battery cell extends out of the first end of the battery cell 1 of the first battery cell and the first interconnection structure 2 on the back side of the second battery cell extends out of the second end of the battery cell 1 of the second battery cell, so that the connection between the first interconnection structure 2 of the first battery cell and the first interconnection structure 2 of the second battery cell is facilitated. Therefore, through the arrangement, one end, connected with each other, of the first interconnection structural members 2 of the two adjacent battery piece units 4 can extend out of the edge of the corresponding battery piece 1, so that the connection between the two adjacent first interconnection structural members 2 is more convenient, the processing difficulty can be reduced, and the processing efficiency can be effectively improved.
In other alternative embodiments of the invention, the first interconnect structure 2 on the front side of the battery cell 4 extends beyond the first end of the battery cell 1, and the first interconnect structure 2 on the back side of the battery cell 4 does not extend beyond the second end of the battery cell 1; alternatively, the first interconnect structure 2 on the front side of the battery cell 4 does not protrude from the first end of the battery cell 1, and the first interconnect structure 2 on the back side of the battery cell 4 protrudes from the second end of the battery cell 1. So set up, the edge of corresponding battery piece 1 can be stretched out to the first interconnection structure 2 of one of two adjacent battery piece units 4, and when the first interconnection structure 2 of two adjacent battery piece units 4 links to each other, the operation is more convenient, can save process time, and the length of the first interconnection structure 2 of one of two adjacent battery piece units 4 can be shorter, can reduce materials cost.
Of course, the present invention is not limited thereto, and it is also possible that the first interconnection structure 2 located at the front side of the battery cell 4 does not protrude from the first end of the battery cell 1, and the first interconnection structure 2 located at the rear side of the battery cell 4 does not protrude from the second end of the battery cell 1.
For example, when the first interconnection structure 2 located on the front side of the battery cell 4 is flush with the first end of the battery cell 1, and the first interconnection structure 2 located on the back side of the battery cell 4 is flush with the second end of the battery cell 1, two adjacent battery cells 4 may be butted to achieve connection between the two adjacent first interconnection structures 2; when the first interconnection structure 2 located at the front side of the battery cell 4 is spaced from the first end of the battery cell 1 and/or the first interconnection structure 2 located at the rear side of the battery cell 4 is spaced from the second end of the battery cell 1, the ends of the battery cells 1 of the adjacent two battery cells 4 may overlap to achieve connection between the adjacent two first interconnection structures 2. Thus, by the above arrangement, the length of the first interconnect structure 2 of each battery cell 4 can be made shorter, so that the cost can be effectively reduced. Further, more battery pieces 1 can be placed per unit area, so that the power generation and conversion efficiency of the photovoltaic module 100, for example, a heterojunction module can be improved.
In some embodiments of the invention, referring to fig. 2, 3, 5 and 7, the first interconnect structure 2 comprises a first interconnect structure section 21 and a second interconnect structure section 22 connected to each other in a length direction, the first interconnect structure section 21 being provided on the front or rear surface of the battery sheet 1, the second interconnect structure section 22 protruding from a corresponding first or second end of the battery sheet 1, the second interconnect structure section 22 being different in shape and/or size from the first interconnect structure section 21. For example, in connection with fig. 2 and 3, the reel solder strips may be first cut to obtain a plurality of first interconnect structures 2, wherein each first interconnect structure 2 comprises a first interconnect structure segment 21 and a second interconnect structure segment 22. Thus, by providing the first interconnect structure section 21 and the second interconnect structure section 22 having different shapes and/or sizes, the connection between the first interconnect structure section 21 and the second interconnect structure section 22 can be opposite to the corresponding first end or second end of the cell 1, so that when the first interconnect structure 2 is connected to the cell 1, the consistency of the length of the first interconnect structure 2 extending out of the cell 1 can be ensured while the processing efficiency is effectively improved, and the appearance aesthetics of the photovoltaic module 100 such as a heterojunction module can be further ensured.
Alternatively, with reference to fig. 2, 3 and 6, the cross-sectional shape of the first interconnect structure segment 21 is circular or polygonal and the cross-sectional shape of the second interconnect structure segment 22 is rectangular. For example, in the examples of fig. 2 and 3, the width of the first interconnect structure segment 21 is less than the width of the second interconnect structure segment 22. Thus, by making the cross-sectional shape of the first interconnect structure segment 21 circular or polygonal, the area of shielding the battery sheet 1 can be reduced and the risk of hidden cracking of the battery sheet 1 can be reduced; by making the cross-sectional shape of the second interconnect structure section 22 rectangular, the second interconnect structure section 22 is flatter, has a smaller thickness, and has better solderability, thereby enabling a secure connection with the adjacent first interconnect structure 2.
In some alternative embodiments of the present invention, the cross-sectional shape of the first interconnect structure segment 21 is circular and the diameter of the first interconnect structure segment 21 is d, wherein d satisfies: d is more than or equal to 0.1mm and less than or equal to 0.5mm. In particular, for example, when d < 0.1mm, the diameter of the first interconnect structure section 21 is too small, which may affect the connection reliability with the fixing film 3 and the battery sheet 1; when d > 0.5mm, the diameter of the first interconnect structure segment 21 is too large, which may increase the shielding area for the cell 1, affecting the conversion efficiency of the photovoltaic module 100. Thus, by letting d satisfy: d is more than or equal to 0.1mm and less than or equal to 0.5mm, and shielding of the battery piece 1 can be reduced while firm connection between the first interconnection structure section 21 and the battery piece 1 is ensured, and the cost is lower.
In some alternative embodiments of the present invention, the second interconnect structure segment 22 is flat and the second interconnect structure segment 22 has a thickness t 1 The second interconnect structure segment 22 has a length L in the length direction of the first interconnect structure segment 21, where t 1 L respectively satisfies the following conditions: t is less than or equal to 0.05mm 1 L is more than or equal to 0.5mm and less than or equal to 5mm. Here, it should be noted that "flat" is understood to mean flatThe thin shape has a relatively smaller dimension in the thickness direction than in the width direction. Thus, by letting t 1 L respectively satisfies the following conditions: t is less than or equal to 0.05mm 1 The thickness and the length of the second interconnecting structure sections 22 are reasonable, and firm connection between the second interconnecting structure sections 22 of two adjacent first interconnecting structure members 2 can be realized, so that displacement of the battery piece 1 caused by flowing of the packaging adhesive film in the lamination process can be effectively avoided.
In some embodiments of the present invention, step S1 specifically includes:
the fixing film 3, the first interconnection structure 2, the battery piece 1, the first interconnection structure 2 and the fixing film 3 are placed in sequence from bottom to top to obtain a prefabricated battery piece. For example, in this step, the cut fixing film 3 may be first placed on a conveyor belt of a welding apparatus, then the first interconnection structure 2 cut to a suitable size is placed on the fixing film 3, and then the back surface of the battery piece 1 is directed downward and the battery piece 1 is placed on the first interconnection structure 2 and the fixing film 3, forming the structure shown in fig. 4. The cut first interconnect structure 2 is then placed on the front side of the battery sheet 1 as shown in fig. 4 and finally the fixing film 3 is placed on the front side of the battery sheet 1 provided with the first interconnect structure 2, forming a separate prefabricated battery sheet as shown in fig. 5.
The prefabricated battery cells are heated to obtain battery cell units 4. Thereby, by heating the prefabricated battery piece, the fixing film 3 can shrink at a certain temperature, so that the first interconnection structure 2 can be firmly fixed between the battery piece 1 and the fixing film 3, and displacement of the first interconnection structure 2 during the carrying process of the battery piece unit 4 is effectively prevented.
Optionally, the heating temperature for heating the prefabricated battery piece is T 1 Wherein T is 1 The method meets the following conditions: t at 60℃ or less 1 The temperature is less than or equal to 110 ℃. Specifically, for example, when T 1 When the temperature is lower than 60 ℃, the heating temperature for heating the prefabricated battery piece is too low, and the fixing film 3 can not shrink, so that the connection firmness between the first interconnection structural member 2 and the battery piece 1 can be influenced; when T is 1 At temperatures > 110 ℃, the heating temperature for heating the prefabricated battery pieces is too high, possibly resulting in fixationThe film 3 melts. Thus, by making T 1 The method meets the following conditions: t at 60℃ or less 1 The temperature of heating the prefabricated battery piece is not higher than 110 ℃, the fixing film 3 can be effectively contracted, so that firm connection between the first interconnection structural member 2 and the battery piece 1 can be ensured, displacement of the first interconnection structural member 2 is avoided, and the fixing film 3 can be prevented from being melted.
Optionally, the heating time for heating the prefabricated battery piece is t, where t satisfies: t is more than or equal to 0.5S and less than or equal to 50S. For example, when t < 0.5S, the heating time for heating the prefabricated battery pieces is too short, the fixing film 3 may not shrink, and thus the connection reliability between the first interconnection structure 2 and the battery pieces 1 may be affected; when t > 50S, the heating time for heating the prefabricated battery piece is excessively long, and the fixing film 3 may be melted. Thus, by letting t satisfy: t is more than or equal to 0.5S and less than or equal to 50S, the heating time for heating the prefabricated battery piece is proper, and the fixing film 3 can be effectively contracted, so that firm connection between the first interconnection structural member 2 and the battery piece 1 can be realized, and the fixing film 3 can be prevented from melting.
In some embodiments of the present invention, referring to fig. 4, 5 and 7, in each of the battery cells 4, the width of the fixing film 3 in the length direction of the first interconnection structure 2 is smaller than the length of the battery sheet 1 in the length direction of the first interconnection structure 2. Thus, on the one hand, the fixing film 3 thus arranged can reduce the cost while ensuring a firm connection between the first interconnection structure 2 and the battery piece 1; on the other hand, it is possible to avoid the fixing film 3 from affecting the electrical connection between the first interconnection structures 2 of the adjacent two battery cells 4, so that the structure of the photovoltaic module 100, such as a heterojunction module, can be more reliable.
In some embodiments of the present invention, in conjunction with fig. 8, step S2 specifically includes: s21, connecting a plurality of battery cells 4 in series to obtain a battery string 5, wherein the first interconnection structure 2 on the front side of one of the two adjacent battery cells 4 of the battery string 5 is connected with the first interconnection structure 2 on the back side of the other of the two adjacent battery cells 4.
For example, in step S21, the individual battery sheet unit 4 may be first placed on the glass 7 provided with the front side packaging film 8 according to the circuit layout design of the heterojunction assembly, wherein the glass 7 may be tempered glass or semi-tempered glass having a thickness of 1.2mm to 4mm (inclusive), the front side packaging film 8 may have a thickness of 0.1mm to 5mm (inclusive), the front side packaging film 8 may be an EVA (ethylene-vinyl acetate copolymer ) member, POE (polyolefin thermoplastic elastomer, polyolefin thermoplastic elastomer) member, TPU (thermoplastic polyurethane elastomer) member, or the like. The first interconnecting structural members 2 of two adjacent battery cells 4 within the same battery string 5 are then welded by a welding device. Thus, by the above-described step S21, the series connection between the plurality of battery pieces 1 in the same battery string 5 can be achieved, and the reliability of the photovoltaic module 100, for example, a heterojunction module can be improved.
Six battery strings 5 are shown in fig. 8 and 9 for illustrative purposes, but it is apparent to one of ordinary skill in the art after reading the present disclosure that it is within the scope of the present disclosure to apply the present disclosure to other numbers of battery strings 5.
Further, as shown in fig. 4, 7 and 8, the first interconnection structures 2 of the adjacent two battery cells 4 of each battery string 5 are lap-connected. For example, in the examples of fig. 4 and 7, the entire lower surface of the second interconnect structure section 22 located at the front side of the battery cell 4 is lap-joined with the entire upper surface of the second interconnect structure section 22 located at the rear side of the adjacent battery cell 4. Thus, by lap-connecting the adjacent first interconnecting structural members 2, the connecting area of the adjacent two first interconnecting structural members 2 can be increased, so that the connection between the adjacent two first interconnecting structural members 2 is more secure.
In a further embodiment of the present invention, in conjunction with fig. 9, after step S21, the method further includes: s22, the first interconnection members 2 at the same end of two adjacent battery strings 5 are connected in parallel through the second interconnection member 6, and the second interconnection member 6 is connected to the first interconnection member 2 of one of the front and rear sides of two adjacent battery strings 5. Thus, by providing the above-described second interconnect structure 6, the second interconnect structure 6 can collect the currents in the corresponding cell strings 5.
In some alternative embodiments of the present invention, the first interconnection structures 2 of the adjacent two battery cells 4 are welded, and the welding temperature of the first interconnection structures 2 of the adjacent two battery cells 4 is T 2 Wherein T is 2 The method meets the following conditions: t at 110℃ or less 2 The temperature is less than or equal to 160 ℃. By the arrangement, the welding temperature of the first interconnection structural members 2 of the two adjacent battery piece units 4 is reasonable, the occurrence of cold joint can be avoided, the low-temperature brittleness of the first interconnection structural members 2 can be reduced, and the reliability of the first interconnection structural members 2 is improved.
Alternatively, when two adjacent first interconnect structures 2 are welded together, the size of the welding head of the welding device may be smaller than the area of the second interconnect structure section 22, so that the melting of the encapsulation film due to the contact of the welding head with the encapsulation film during welding can be prevented.
In some embodiments of the invention, each first interconnect structure 2 comprises a conductive matrix and a solder layer covering at least a portion of the outer surface of the conductive matrix. The conductive matrix can be a copper matrix, a copper-aluminum alloy matrix, a copper-silver alloy matrix or a copper-silver-aluminum alloy matrix, etc. But is not limited thereto.
Specifically, the solder layer may be composed of Sn (tin, a metallic element having silvery white luster) and Bi (bismuth, an element of group VA 83 of the sixth period of the periodic table). Among these, sn has a low melting point, soft texture, and ductility, and plays an important role in the connection between the first interconnect structure 2 and the battery sheet 1. The Bi element can reduce the melting point temperature of the soldering tin layer, so that the welding temperature of the first interconnection structural member 2 can be reduced, the yield of the battery piece 1 is improved, and the occurrence of cold joint is avoided. And the method is pollution-free and environment-friendly.
Or the soldering tin layer can be composed of Sn and Ag (one of silver and transition metal), and has stable physicochemical properties, good heat conduction and electric conduction performance, soft quality and rich ductility. By this arrangement, the solder layer can have good electrical conductivity, so that the current generated by the photovoltaic effect of the battery sheet 1 can be better collected.
Still alternatively, the solder layer is composed of Sn, bi, and Pb (lead, a metal chemical element having an atomic number of 82, an atomic weight of 207.2, and a non-radioactive element having the largest atomic weight). By adding Pb to the solder layer, the tension and viscosity of the surface of the solder layer can be reduced, so that the solder layer has good wettability and can well absorb thermal stress generated by temperature change.
Of course, the present invention is not limited thereto, and the solder layer may be composed of Sn, bi, and Ag or Sn, pb, and Ag. Therefore, when the soldering tin layer consists of Sn, bi and Ag, the soldering tin layer has better conductivity and can reduce the melting point temperature of the soldering tin layer; when the solder layer is composed of Sn, pb and Ag, the solder layer also has good conductivity and good wettability.
Further, when the solder layer is composed of Sn, bi and Pb, the Bi content is 5% to 40% (inclusive). Thus, the melting point of the solder layer can be reduced, and the low-temperature brittleness can be reduced, thereby preventing oxidation.
When the solder layer is composed of Sn, pb and Ag, the content of Ag is 1% -40% (inclusive). Thus, on one hand, the solder layer can be ensured to have better conductive performance, and on the other hand, the cost of the solder layer can be reduced.
In some embodiments of the invention, the solder layer has a melting point T 3 Wherein T is 3 The method meets the following conditions: t at 110℃ or less 3 The temperature is less than or equal to 170 ℃. Specifically, for example, when T 3 When the temperature is lower than 110 ℃, the melting point temperature of the soldering tin layer is too low, the brittleness is larger, and therefore the reliability of the first interconnection structural member 2 is lower; when T is 3 At > 170 c, the melting point temperature of the solder layer is too high, so that the soldering temperature of the first interconnection structure 2 is high, which may result in a high yield of the battery chip 1 and the possibility of a dummy solder joint. Thus, by making T 3 The method meets the following conditions: t at 110℃ or less 3 The melting point temperature of the soldering tin layer is reasonable and is lower than or equal to 170 ℃, so that the yield of the battery piece 1 can be improved, cold joint is avoided, the low-temperature brittleness can be reduced, and the reliability of the first interconnection structural member 2 is improved.
In the present inventionIn some embodiments, the thickness of the fixing film 3 is t 2 Wherein t is 2 The method meets the following conditions: t is less than or equal to 0.05mm 2 Is less than or equal to 1mm. For example, when t 2 When the thickness of the fixing film 3 is less than 0.05mm, the strength is possibly too low, firm connection between the first interconnection structural member 2 and the battery piece 1 cannot be realized, the first interconnection structural member is easy to damage, and the reliability is low; when t 2 At > 1mm, the thickness of the fixing film 3 is excessively large, which may cause the light transmittance to be excessively low, and thus the output power of the photovoltaic module 100, for example, a heterojunction module may be reduced. Thus, by letting t 2 The method meets the following conditions: t is less than or equal to 0.05mm 2 And less than or equal to 1mm, the firm connection between the first interconnection structural member 2 and the battery piece 1 is realized, and meanwhile, the battery piece 1 can be ensured to have higher current collection efficiency, and the photovoltaic module 100 such as a heterojunction module can be ensured to have higher output power.
Alternatively, the fixing film 3 may be a thermosetting adhesive film, for example, an EVA piece, a POE piece, a TPU piece, or the like. Or alternatively, the fixing film 3 may be a composite film of a thermosetting adhesive film and other transparent polymer materials, for example, a composite of EVA, PET (polyethylene glycol terephthalate, polyethylene terephthalate) and PMMA (polymethyl methacrylate ) (for example, a composite of EVA and PET, a composite of EVA and PMMA). But is not limited thereto.
In some embodiments of the present invention, after step S22, further includes:
s3, laminating. Specifically, referring to fig. 9 and 10, the back packaging film 9 and the back sheet 10 are first placed on the battery cell 4 in sequence, and then the photovoltaic module 100 is sequentially formed of the glass 7, the front packaging film 8, the plurality of battery strings 5, the back packaging film 9 and the back sheet 10 from top to bottom, so as to complete the preparation work before lamination of the photovoltaic module 100, such as a heterojunction module. The back packaging adhesive film 9 may be an EVA piece, a POE piece, a TPU piece, or the like, and the back sheet 10 may be a fluorine-containing back sheet such as a KPF back sheet, a KPE back sheet, a TPT back sheet, or a TPE back sheet, or a fluorine-free back sheet such as a PPE back sheet, or may be tempered glass or semi-tempered glass having a thickness of 1.2mm to 4mm (inclusive).
And then, carrying out vacuumizing, heating and laminating on the laminated five-layer structure comprising the glass 7, the front packaging adhesive film 8, the plurality of battery strings 5, the back packaging adhesive film 9 and the back plate 10, and then, crosslinking and curing the front packaging adhesive film 8 and the back packaging adhesive film 9 to protect the plurality of battery strings 5, so as to finally realize firm bonding of the five-layer structure (namely the glass 7, the front packaging adhesive film 8, the plurality of battery strings 5, the back packaging adhesive film 9 and the back plate 10). Wherein the lamination temperature may be 140-170 ℃ (inclusive), the lamination time may be 5-25 minutes (inclusive),
s4, installing a frame and a junction box. For example, the fabrication of the photovoltaic module 100, e.g., heterojunction module, can be completed by mounting the aluminum alloy frame and junction box and then sealing with silicone.
The photovoltaic module 100 according to the embodiment of the second aspect of the present invention, such as a heterojunction module, is manufactured by the manufacturing method of the photovoltaic module 100 according to the embodiment of the first aspect of the present invention.
According to the photovoltaic module 100, for example, the heterojunction module, according to the embodiment of the invention, by adopting the manufacturing method of the photovoltaic module 100, the first interconnection structural member 2, for example, the welding strip, can be prevented from being shifted in the carrying process, so that the structure of the photovoltaic module 100, for example, the heterojunction module is more reliable, the shift of the battery piece 1 caused by the flowing of the packaging adhesive film in the laminating process can be prevented, and the structural stability of the photovoltaic module 100 can be improved.
Other constructions and operations of photovoltaic modules 100, such as heterojunction modules, according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the invention, a "first feature" or "second feature" may include one or more of such features.
In the description of the invention, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.
In the description of the invention, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (19)
1. The manufacturing method of the photovoltaic module is characterized by comprising the following steps of:
s1, arranging a first interconnection structural member and a fixing film on the front surface and the back surface of each battery piece to obtain a battery piece unit, wherein the fixing film is positioned on one side of the first interconnection structural member, which is far away from the battery piece;
s2, connecting the first interconnection structural members of the battery piece units to realize electric connection of the battery piece units;
the step S1 specifically comprises the following steps:
the fixing film, the first interconnection structural member, the battery piece, the first interconnection structural member and the fixing film are sequentially placed from bottom to top to obtain a prefabricated battery piece;
and heating the prefabricated battery piece to obtain the battery piece unit.
2. The method of manufacturing a photovoltaic module according to claim 1, wherein, in step S1,
the battery piece has a first end and a second end opposite to each other, the first interconnection structure on the front side of the battery piece unit extends out of the first end of the battery piece, and the first interconnection structure on the back side of the battery piece unit extends out of the second end of the battery piece.
3. The method of manufacturing a photovoltaic module according to claim 2, wherein the first interconnect structure comprises a first interconnect structure section and a second interconnect structure section connected to each other in a length direction, the first interconnect structure section being provided on a front or back surface of the cell sheet, the second interconnect structure section extending beyond the corresponding first or second end of the cell sheet, the second interconnect structure section being different in shape and/or size from the first interconnect structure section.
4. A method of fabricating a photovoltaic module according to claim 3, wherein the cross-sectional shape of the first interconnect structure segment is circular or polygonal and the cross-sectional shape of the second interconnect structure segment is rectangular.
5. The method of claim 3, wherein the first interconnect structure segment has a circular cross-sectional shape and a diameter d, wherein d satisfies: d is more than or equal to 0.1mm and less than or equal to 0.5mm.
6. The method of claim 3, wherein the second interconnect structure segment is flat, and the thickness of the second interconnect structure segment is t 1 The length of the second interconnect structure segment in the length direction of the first interconnect structure segment is L, wherein the t 1 L respectively satisfies the following conditions: t is less than or equal to 0.05mm 1 ≤0.5mm，0.5mm≤L≤5mm。
7. The method of claim 1, wherein the heating temperature for heating the prefabricated battery piece is T 1 Wherein the T is 1 The method meets the following conditions: t at 60℃ or less 1 ≤110℃。
8. The method of claim 1, wherein the heating time for heating the prefabricated battery piece is t, wherein t satisfies: t is more than or equal to 0.5S and less than or equal to 50S.
9. The method of manufacturing a photovoltaic module according to claim 1, wherein, in each of the battery cells, a width of the fixing film in a length direction of the first interconnection structure is smaller than a length of the battery cells in the length direction of the first interconnection structure.
10. The method of manufacturing a photovoltaic module according to claim 1, wherein step S2 specifically comprises:
s21, connecting a plurality of battery piece units in series to obtain a battery string,
the first interconnection structure of the front face of one of the adjacent two battery cells of the battery string is connected with the first interconnection structure of the back face of the other of the adjacent two battery cells.
11. The method of claim 10, wherein the first interconnecting structural members of two adjacent cells of each string are lap-connected.
12. The method of manufacturing a photovoltaic module according to claim 10, further comprising, after step S21: s22, connecting the first interconnection structural members adjacent to the same end of two battery strings in parallel through a second interconnection structural member,
the second interconnecting structure is connected with the first interconnecting structure of two adjacent battery strings, which is positioned on one of the front surface and the back surface.
13. The method of manufacturing a photovoltaic module according to claim 10, wherein the first interconnection structures of two adjacent battery cells are welded together, and the welding temperature of the first interconnection structures of two adjacent battery cells is T 2 Wherein the T is 2 The method meets the following conditions: t at 110℃ or less 2 ≤160℃。
14. The method of any one of claims 1-13, wherein each of the first interconnecting structural members comprises:
a conductive substrate;
a solder layer covering at least a portion of an outer surface of the conductive substrate,
the soldering tin layer consists of Sn and Bi; or (b)
The soldering tin layer consists of Sn and Ag; or (b)
The soldering tin layer consists of Sn, bi and Ag; or (b)
The soldering tin layer consists of Sn, bi and Pb; or (b)
The soldering tin layer is composed of Sn, pb and Ag.
15. The method of claim 14, wherein when the solder layer is composed of Sn, bi, and Pb, the Bi content is 5% to 40%;
when the soldering tin layer consists of Sn, pb and Ag, the content of the Ag is 1-40%.
16. The method of claim 14, wherein the solder layer has a melting point T 3 Wherein said T is 3 The method meets the following conditions: t at 110℃ or less 3 ≤170℃。
17. The method of any one of claims 1-13, wherein the fixing film has a thickness t 2 Wherein said t 2 The method meets the following conditions: t is less than or equal to 0.05mm 2 ≤1mm。
18. The method of any one of claims 1-13, wherein the fixing film is an EVA piece, POE piece, TPU piece, or a composite of EVA, PET, and PMMA.
19. A photovoltaic module produced by the method of any one of claims 1 to 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011383287.2A CN114583001B (en) | 2020-12-01 | 2020-12-01 | Photovoltaic module and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011383287.2A CN114583001B (en) | 2020-12-01 | 2020-12-01 | Photovoltaic module and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114583001A CN114583001A (en) | 2022-06-03 |
| CN114583001B true CN114583001B (en) | 2024-03-08 |
Family
ID=81768172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011383287.2A Active CN114583001B (en) | 2020-12-01 | 2020-12-01 | Photovoltaic module and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114583001B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115050850B (en) * | 2022-07-13 | 2024-07-09 | 晶澳(扬州)新能源有限公司 | Battery string, photovoltaic module and preparation method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014157967A (en) * | 2013-02-18 | 2014-08-28 | Fuji Electric Co Ltd | Solar cell module and method of manufacturing the same |
| CN106653880A (en) * | 2017-01-22 | 2017-05-10 | 泰州乐叶光伏科技有限公司 | Electrode interconnection structure of IBC battery |
| CN109390424A (en) * | 2018-11-15 | 2019-02-26 | 江苏润达光伏无锡有限公司 | The completely black photovoltaic module of pad pasting and its manufacturing method |
| CN110797434A (en) * | 2019-09-24 | 2020-02-14 | 武宇涛 | Preparation method of photovoltaic cell module and photovoltaic cell module |
| CN111354813A (en) * | 2020-04-20 | 2020-06-30 | 珠海格力电器股份有限公司 | Photovoltaic module and method for manufacturing same |
| CN211700303U (en) * | 2020-04-20 | 2020-10-16 | 宁波华顺太阳能科技有限公司 | Piece formula photovoltaic module |
| CN211789058U (en) * | 2020-09-09 | 2020-10-27 | 东方日升(义乌)新能源有限公司 | High-efficiency photovoltaic module |
| CN111883605A (en) * | 2020-08-12 | 2020-11-03 | 常州亚玛顿股份有限公司 | Laminating process of photovoltaic hollow glass assembly |
-
2020
- 2020-12-01 CN CN202011383287.2A patent/CN114583001B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014157967A (en) * | 2013-02-18 | 2014-08-28 | Fuji Electric Co Ltd | Solar cell module and method of manufacturing the same |
| CN106653880A (en) * | 2017-01-22 | 2017-05-10 | 泰州乐叶光伏科技有限公司 | Electrode interconnection structure of IBC battery |
| CN109390424A (en) * | 2018-11-15 | 2019-02-26 | 江苏润达光伏无锡有限公司 | The completely black photovoltaic module of pad pasting and its manufacturing method |
| CN110797434A (en) * | 2019-09-24 | 2020-02-14 | 武宇涛 | Preparation method of photovoltaic cell module and photovoltaic cell module |
| CN111354813A (en) * | 2020-04-20 | 2020-06-30 | 珠海格力电器股份有限公司 | Photovoltaic module and method for manufacturing same |
| CN211700303U (en) * | 2020-04-20 | 2020-10-16 | 宁波华顺太阳能科技有限公司 | Piece formula photovoltaic module |
| CN111883605A (en) * | 2020-08-12 | 2020-11-03 | 常州亚玛顿股份有限公司 | Laminating process of photovoltaic hollow glass assembly |
| CN211789058U (en) * | 2020-09-09 | 2020-10-27 | 东方日升(义乌)新能源有限公司 | High-efficiency photovoltaic module |
Non-Patent Citations (1)
| Title |
|---|
| "光伏组件制造过程封损控制方法的研究";马昀锋 等;《 电子世界》;20180123;第2018卷(第02期);第5-7页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114583001A (en) | 2022-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9466748B2 (en) | Optoelectronic device with heat spreader unit | |
| US8586857B2 (en) | Combined diode, lead assembly incorporating an expansion joint | |
| JP5367569B2 (en) | Manufacturing method of solar cell module | |
| JP5410050B2 (en) | Solar cell module | |
| EP4053921B1 (en) | Solar cell string, photovoltaic module and manufacturing methods therefor | |
| WO2011024662A1 (en) | Solar cell string and solar cell module using same | |
| JP5879513B2 (en) | Solar cell module | |
| US20120080069A1 (en) | Solar cell module | |
| EP4246599A1 (en) | Photovoltaic module manufacturing method, battery module, battery string and photovoltaic module | |
| CN112786727B (en) | Composite membrane for mutual combination of main-grid-free heterojunction solar cell modules and preparation method thereof | |
| WO2024012161A1 (en) | Main gate-free ibc battery module unit and manufacturing method thereof, battery module, and battery module string | |
| US20110284051A1 (en) | Photoelectric Conversion Cell, Photoelectric Conversion Module, and Method for Manufacturing Photoelectric Conversion Cell | |
| CN114583001B (en) | Photovoltaic module and manufacturing method thereof | |
| CN116247129A (en) | Preparation method of non-main grid XBC battery assembly and battery assembly thereof | |
| JP5535472B2 (en) | Solar cell module and method for replacing solar cell | |
| CN115732580A (en) | Photovoltaic module | |
| CN108258076A (en) | A kind of solar cell module using shape welding band | |
| JP2010251569A (en) | Solar cell module | |
| EP2096682A1 (en) | Solar cell module and method for manufacturing the same | |
| JP2014175520A (en) | Solar battery module and manufacturing method for the same | |
| CN208315570U (en) | A kind of solar battery sheet component using shape welding band | |
| CN115207138A (en) | Photovoltaic module, battery string and manufacturing method thereof | |
| US20240243211A1 (en) | Photovoltaic module and preparation method thereof | |
| CN109390427A (en) | Back-contact conduction integrates backboard, photovoltaic module and its manufacturing method | |
| JP2010141206A (en) | Solar cell module and replacing method for solar cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |