CN114093970A - Photovoltaic module and preparation method thereof - Google Patents
Photovoltaic module and preparation method thereof Download PDFInfo
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- CN114093970A CN114093970A CN202111045144.5A CN202111045144A CN114093970A CN 114093970 A CN114093970 A CN 114093970A CN 202111045144 A CN202111045144 A CN 202111045144A CN 114093970 A CN114093970 A CN 114093970A
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- 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
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- 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
- H10F19/804—Materials of encapsulations
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- 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
- H10F19/807—Double-glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
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- 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
- H10F71/00—Manufacture or treatment of devices covered by this subclass
- H10F71/137—Batch treatment of the devices
- H10F71/1375—Apparatus for automatic interconnection of photovoltaic cells in a module
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
本发明提供了一种光伏组件及其制备方法，所述光伏组件包括第一玻璃层、第二玻璃层，以及夹设于所述第一玻璃层、第二玻璃层之间的至少一个电池片，相邻所述电池片均通过互联条和汇流条连接，所述互联条由电池片引出并连接至汇流条的焊带区上，所述电池片的正极引出的互联条与汇流条焊带区的连接处设置有密封绝缘层；所述第一玻璃层靠近电池片的一侧表面设置有第一封胶层，所述第二玻璃层靠近电池片的一侧表面设置有第二封胶层。本发明采用密封绝缘层隔绝光伏组件的汇流条或者互联条，改善双面双玻组件，有效避免PID测试后釉面玻璃(网格涂釉或者全涂覆)外观发黑、发黄外观的失效。
The present invention provides a photovoltaic module and a preparation method thereof. The photovoltaic module includes a first glass layer, a second glass layer, and at least one cell sandwiched between the first glass layer and the second glass layer. , the adjacent battery pieces are connected by interconnecting bars and bus bars, the interconnecting bars are drawn from the battery pieces and connected to the welding strip area of the bus bars, and the interconnecting bars drawn from the positive electrodes of the battery pieces are connected with the bus bar welding strips. A sealing insulating layer is arranged at the connection of the area; a first sealing glue layer is arranged on the side surface of the first glass layer close to the battery sheet, and a second sealing glue layer is arranged on the side surface of the second glass layer close to the battery sheet Floor. The invention adopts the sealing insulating layer to isolate the bus bars or interconnecting bars of the photovoltaic modules, improves the double-sided double-glass modules, and effectively avoids the blackening and yellowing failure of the appearance of the glazed glass (grid-glazed or full-coated) after the PID test. .
Description
Technical Field
The invention belongs to the technical field of photovoltaic modules, and particularly relates to a photovoltaic module and a preparation method thereof.
Background
Photovoltaic module is in outdoor use, and environment such as high temperature humidity or rainwater produces vapor easily, and in case inside vapor gets into the subassembly through banding silica gel, the packaging material glued membrane EVA then can take place hydrolysis reaction with water, produces acetic acid. Acetic acid moves freely and reacts with alkali on the surface of the glass to generate sodium ions which can move freely, and the sodium ions move to the surface of the cell and are enriched in the antireflection layer to enable the cell to be invalid, so that a PID (Potential Induced Degradation) effect is generated.
At present, a POE adhesive film is used for replacing EVA (ethylene vinyl acetate) of the double-glass component, a certain PID (proportion integration differentiation) improvement purpose is expected to be achieved, POE does not contain ester groups, and the PID resistance is better than that of EVA, but when the insulation thickness of a conductor and glazed glass (grid glazing or full coating) is reduced to a certain limit, after a PID (proportion integration differentiation) test, the glazed glass (grid glazing or full coating) has the appearance failure problems of blackening, yellowing and the like, so that a better process improvement method is needed to be sought.
CN212010998U discloses a photovoltaic module bus bar structure and a photovoltaic module, including a glass back plate, a bus bar arranged on the glass back plate, and battery pieces arranged at two sides of the bus bar, wherein the battery pieces are connected with the bus bar through solder strips; the bus bar cross-section is the arc and its surface both sides correspond it is provided with the recess to weld the area, the degree of depth of recess with the thickness phase-match of welding the area has the not fragile and high photovoltaic module generating efficiency's of battery piece advantage.
CN213425001U discloses a photovoltaic module, seal excessive gluey frock and lamination frock, includes: the battery comprises a cover plate, a back plate and a battery layer arranged between the cover plate and the back plate; the back plate comprises a back plate main body and two cable accommodating grooves arranged on the side edges of the back plate; every busbar derivation end is connected with an external cable, and every busbar derivation end sets up in a cable storage tank with the external cable that corresponds, this utility model discloses in, photovoltaic module can be by apron and backplate, and obtain after setting up the battery layer lamination between apron and backplate, because busbar derivation end and external cable setting are in the cable storage tank of backplate side among the photovoltaic module, therefore, can save the terminal box that is used for holding diode and busbar derivation end and external cable among this photovoltaic module, thereby can reduce photovoltaic module's overall height, improve photovoltaic module's vanning rate, and simultaneously, the holistic cost of manufacture of photovoltaic module has been reduced.
CN107294490A discloses a novel cooling photovoltaic module structure, which comprises an aluminum alloy frame, wherein a plurality of placing grooves are formed in the inner side of the aluminum alloy frame, and a toughened glass layer, an upper EVA (ethylene vinyl acetate) film layer, a tandem cell layer, a lower EVA film layer, a high-thermal-conductivity back sheet layer, an upper waterproof adhesive layer, a cold medium support flow guide framework layer, a lower waterproof adhesive layer, a back sheet layer and the like are sequentially erected and arranged from top to bottom through the placing grooves formed in two corresponding aluminum alloy frames; compared with the prior art, the invention has the following advantages: adding a proper refrigerant medium into the back plate in a self-contained cooling mode; the engineering installation is simple and convenient, and is consistent with the installation procedure of the conventional assembly; the temperature of the assembly is reduced, and the generating capacity of the assembly is improved; and the fire threat brought by the hot spot effect is relieved to a great extent.
The existing photovoltaic module has the phenomenon of module PID appearance failure, and how to improve and improve the reliability of the photovoltaic module becomes the problem which needs to be solved urgently at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a photovoltaic module and a preparation method thereof, wherein a sealing insulating layer is adopted to isolate bus bars or interconnection bars of the photovoltaic module, so that a double-sided double-glass module is improved, the failure of blackened and yellowish appearance of glazed glass (grid glazing or full coating) after a PID test is effectively avoided, and the photovoltaic module has the characteristics of simple structure, convenience in implementation, industrial production and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a photovoltaic module, which comprises a first glass layer, a second glass layer and at least one cell piece sandwiched between the first glass layer and the second glass layer, wherein adjacent cell pieces are connected through an interconnection bar and a bus bar, the interconnection bar is led out from the cell piece and is connected to a welding strip area of the bus bar, and a sealing insulating layer is arranged at the joint of the interconnection bar led out from the positive electrode of the cell piece and the welding strip area of the bus bar. A first adhesive tape layer is arranged on the surface, close to the cell, of one side of the first glass layer, and a second adhesive tape layer is arranged on the surface, close to the cell, of one side of the second glass layer.
According to the photovoltaic module, the sealing insulating layer is arranged at the connecting part of the interconnection bar led out from the positive electrode of the cell piece and the bus bar welding strip area, when the module is in a high-temperature high-humidity environment, water vapor enters the module, acetic acid generated by hydrolysis of the sealing adhesive layer reacts with alkaline substances on the surface of glass to generate movable sodium ions, and the sealing insulating layer adhered to the positive electrode of the bus bar can improve the thickness of the insulating layer, reduce the ionic valence state transformation of the glazing layer and enable the product not to have poor appearance after PID (proportion integration differentiation) test.
It should be noted that the number of the interconnection bars connected between the battery pieces is not specifically required and limited, and those skilled in the art can reasonably select the number of the interconnection bars according to the size or design requirement of the battery pieces, for example, the number of the interconnection bars is 3.
In a preferred embodiment of the present invention, a sealing insulating layer is also provided at a junction between the interconnection bar led out from the negative electrode of the battery piece and the bus bar bonding pad region.
According to the invention, the sealing insulating layer is arranged at the joint of the interconnection bar led out from the negative electrode of the battery piece and the bus bar welding strip area, so that the protection of the bus bar at the negative electrode side is increased, and the problem of failure caused by PID (proportion integration differentiation) test is further avoided.
In a preferred embodiment of the present invention, the thickness of the sealing insulating layer is 140 to 150 μm, for example, 140 μm, 141 μm, 142 μm, 143 μm, 144 μm, 145 μm, 146 μm, 147 μm, 148 μm, 149 μm or 150 μm, but the thickness is not limited to the above-mentioned values, and other values not listed in the above-mentioned value range are also applicable.
As a preferable aspect of the present invention, the material of the sealing insulating layer includes a viscous insulating material.
Preferably, the adhesive insulation material comprises one or a combination of at least two of a high temperature resistant tape, a transparent insulating paper or a rubber sheet.
As a preferable technical scheme of the invention, the adjacent battery pieces are connected in series or in parallel.
In a preferred embodiment of the present invention, the thickness of the first sealant layer is 0.3 to 0.7mm, for example, 0.30mm, 0.35mm, 0.40mm, 0.45mm, 0.50mm, 0.55mm, 0.60mm, 0.65mm, or 0.70mm, but the thickness is not limited to the above-mentioned values, and other values not listed in the above-mentioned value range are also applicable.
Preferably, the material of the first sealant layer includes EVA and/or POE.
Preferably, the thickness of the second sealant layer is 0.3 to 0.7mm, such as 0.30mm, 0.35mm, 0.40mm, 0.45mm, 0.50mm, 0.55mm, 0.60mm, 0.65mm or 0.70mm, but not limited to the enumerated values, and other non-enumerated values in the numerical range are also applicable.
Preferably, the material of the second adhesive tape layer comprises EVA and/or POE.
As a preferred technical solution of the present invention, the battery pieces are connected to form at least one battery piece group, and the battery piece groups are connected by jumpers.
It should be noted that, the connection between the battery packs through the jumper wire is only an example, and a person skilled in the art may also reasonably select the connection mode between the battery packs according to the design requirement, and the invention is not particularly limited.
Preferably, the welding area connection position of the jumper wire and the bus bar is also provided with a sealing insulating layer.
As a preferable aspect of the present invention, the sealing insulating layer covers the entire bus bar.
In a second aspect, the present invention provides a method for preparing the photovoltaic module according to the first aspect, the method comprising:
and serially welding the cell pieces, the interconnection bars and the bus bars, arranging a sealing insulating layer at the joint of the interconnection bar led out of the positive electrode of the cell piece and the bus bar welding strip region, and laminating the sealing insulating layer with the first glass layer and the second glass layer to obtain the photovoltaic module.
As a preferred technical scheme of the invention, the preparation method specifically comprises the following steps:
paving a first adhesive sealing layer on the surface of a first glass layer;
(II) serially welding the battery pieces, the interconnection bars and the bus bars, and after sealing insulating layers are attached to welding areas of the interconnection bars and the bus bars and welding areas of the jumper wires and the bus bars, arranging and positioning the battery pieces, the interconnection bars and the bus bars on a first glass layer paved with a first adhesive layer;
and (III) laying a second adhesive sealing layer, covering and laminating a second glass layer, and preparing the photovoltaic module.
It should be noted that, in the present invention, there is no specific requirement or limitation on the manner of attaching the sealing insulating layer, for example, manual adhesion or mechanical adhesion can be used in the present invention, and those skilled in the art can reasonably select the attaching manner according to actual requirements.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the invention to the precise numerical values encompassed within the range for brevity and clarity.
Compared with the prior art, the invention has the beneficial effects that:
according to the photovoltaic module, the sealing insulating layer is arranged at the connecting part of the interconnection bar led out from the positive electrode of the cell piece and the bus bar welding strip area, when the module is in a high-temperature high-humidity environment, water vapor enters the module, acetic acid generated by hydrolysis of the sealing adhesive layer reacts with alkaline substances on the surface of glass to generate movable sodium ions, and the sealing insulating layer adhered to the positive electrode of the bus bar can improve the thickness of the insulating layer, reduce the ionic valence state transformation of the glazing layer and enable the product not to have poor appearance after PID (proportion integration differentiation) test.
Drawings
FIG. 1 is a schematic structural view of a photovoltaic module provided in one embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure diagram of a photovoltaic module according to an embodiment of the present invention.
Wherein, 1-cell slice; 2-jumper wire; 3-sealing the insulating layer; 4-interconnecting strips; 5-a bus bar; 6-a first adhesive sealing layer; 7-a first glass layer; 8-a second glass layer; 9-second adhesive sealing layer.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments.
In one embodiment, the invention provides a photovoltaic module, as shown in fig. 1 and fig. 2, the photovoltaic module comprises a first glass layer 7, a second glass layer 8, and at least one cell sheet 1 sandwiched between the first glass layer 7 and the second glass layer 8, adjacent cell sheets 1 are connected through an interconnection bar 4 and a bus bar 5, the interconnection bar 4 is led out from the cell sheet 1 and is connected to a welding strip region of the bus bar 5, and a sealing insulating layer 3 is arranged at the joint of the interconnection bar 4 led out from the positive electrode of the cell sheet 1 and the welding strip region of the bus bar 5. The first glass layer 7 is provided with a first adhesive tape layer 6 on the surface of one side close to the battery piece 1, and the second glass layer 8 is provided with a second adhesive tape layer 9 on the surface of one side close to the battery piece 1. Optionally, the number of interconnecting strips 4 is 3.
According to the photovoltaic module, the sealing insulating layer 3 is arranged at the joint of the welding strip region of the bus bar 5 and the interconnection bar 4 led out from the positive electrode of the cell 1, when the module is in a high-temperature high-humidity environment, water vapor enters the module, acetic acid generated by hydrolysis of the sealing adhesive layer reacts with alkaline substances on the surface of glass to generate movable sodium ions, and the sealing insulating layer 3 adhered to the positive electrode of the bus bar 5 can improve the thickness of the insulating layer, reduce ionic valence state transformation of a glaze coating layer and enable a product not to have poor appearance after a PID (proportion integration differentiation) test.
Further, the junction of the interconnection bar 4 from which the negative electrode of the battery piece 1 is drawn and the solder ribbon region of the bus bar 5 is also provided with the sealing insulating layer 3. According to the invention, the sealing insulating layer 3 is also arranged at the joint of the welding strip region of the bus bar 5 and the interconnection bar 4 led out from the negative electrode of the battery piece 1, so that the protection of the bus bar 5 on the negative electrode side is increased, and the problem of failure caused by PID test is further avoided.
Further, the thickness of the sealing insulating layer 3 is 140 to 150 μm, and further, the material of the sealing insulating layer 3 includes a viscous insulating material, and the viscous insulating material includes one or a combination of at least two of a high temperature resistant tape, transparent insulating paper, and rubber.
Further, adjacent battery plates 1 are connected in series or in parallel.
Further, the thickness of the first adhesive tape layer 6 is 0.3-0.7 mm, and the material includes EVA and/or POE.
Further, the thickness of the second adhesive sealing layer 9 is 0.3-0.7 mm, and the material includes EVA and/or POE.
Further, the battery pieces 1 are connected to form at least one battery piece group, and the battery piece groups are connected through the jumper wires 2. Further, a seal insulating layer 3 is also provided at the connection of the jumper 2 and the welding area of the bus bar 5.
Further, the sealing insulating layer 3 covers the entire bus bar 5.
In another embodiment, the present invention provides a method for preparing the photovoltaic module, wherein the method specifically comprises the following steps:
the method comprises the following steps that (I) a first adhesive sealing layer 6 is laid on the surface of a first glass layer 7;
(II) serially welding the battery piece 1, the interconnection bars 4 and the bus bars 5, and after sealing insulating layers 3 are attached to welding areas of the interconnection bars 4 and the bus bars 5 and welding areas of the jumper wires 2 and the bus bars 5, arranging and positioning the battery piece on a first glass layer 7 paved with a first adhesive sealing layer 6;
and (III) laying a second adhesive sealing layer 9, covering and laminating a second glass layer 8, and preparing the photovoltaic module.
Alternatively, the attaching manner of the sealing insulation layer 3 includes manual attaching or mechanical attaching.
Example 1
The embodiment provides a photovoltaic module, which is based on a specific embodiment, wherein the number of interconnection bars 4 is 3, the number of battery pieces 1 is ten, and five battery strings are formed; the thickness of the sealing insulating layer 3 is 145 mu m, and the material is a high-temperature resistant adhesive tape; a sealing insulating layer 3 is arranged at the position of the joint of the interconnection bar 4 led out of the positive electrode of the battery piece 1 and the welding strip region of the bus bar 5; the thickness of first adhesive tape 6 is 0.5mm, and the material is POE, and the thickness of second adhesive tape 9 is 0.5mm, and the material is EVA.
Comparative example 1
This comparative example provides a photovoltaic module, which is different from example 1 in that the sealing insulating layer 3 is not provided.
The photovoltaic modules in the example 1 and the comparative example 1 are subjected to a PID test at a temperature of 85 ℃ and a humidity of 85%, and the appearances of the example 1 and the comparative example 1 are observed after the test, so that the comparative example 1 has obvious blackening and yellowing phenomena, and the example 1 is observed reversely, the appearance is unchanged, and the blackening and yellowing problems do not exist.
Through the above embodiments and comparative examples, in the photovoltaic module of the present invention, the sealing insulating layer 3 is disposed at the joint of the bonding strip region of the bus bar 5 and the interconnection bar 4 led out from the positive electrode of the battery piece 1, when the module is in a high temperature and high humidity environment, water vapor enters the inside of the module, acetic acid generated by hydrolysis of the sealing adhesive layer reacts with alkaline substances on the surface of the glass to generate movable sodium ions, and the sealing insulating layer 3 adhered to the positive electrode of the bus bar 5 can increase the thickness of the insulating layer, reduce the ionic valence state transformation of the glazing layer, and make no bad appearance phenomenon after PID test of the product.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The photovoltaic module is characterized by comprising a first glass layer, a second glass layer and at least one cell piece clamped between the first glass layer and the second glass layer, wherein the adjacent cell pieces are connected through an interconnection bar and a bus bar, the interconnection bar is led out from the cell piece and is connected to a welding strip area of the bus bar, and a sealing insulating layer is arranged at the joint of the interconnection bar led out from the positive electrode of the cell piece and the welding strip area of the bus bar;
a first adhesive tape layer is arranged on the surface, close to the cell, of one side of the first glass layer, and a second adhesive tape layer is arranged on the surface, close to the cell, of one side of the second glass layer.
2. The photovoltaic module of claim 1, wherein the junction of the interconnection bar from which the negative electrode of the cell piece is led and the bus bar bonding strip region is also provided with a sealing insulating layer.
3. The photovoltaic module according to claim 1 or 2, wherein the thickness of the sealing insulating layer is 140 to 150 μm.
4. The photovoltaic module of any of claims 1-3, wherein the material of the sealing and insulating layer comprises an adhesive insulating material;
preferably, the adhesive insulation material comprises one or a combination of at least two of a high temperature resistant tape, a transparent insulating paper or a rubber sheet.
5. The photovoltaic module according to any one of claims 1 to 4, wherein adjacent cells are connected in series or in parallel.
6. The photovoltaic module according to any one of claims 1 to 5, wherein the thickness of the first sealant layer is 0.3 to 0.7 mm;
preferably, the material of the first sealant layer includes EVA and/or POE;
preferably, the thickness of the second adhesive sealing layer is 0.3-0.7 mm;
preferably, the material of the second adhesive tape layer comprises EVA and/or POE.
7. The photovoltaic module according to any one of claims 1 to 6, wherein the cell pieces are connected to form at least one cell piece group, and the cell piece groups are connected with each other through a jumper wire;
preferably, the welding area connection position of the jumper wire and the bus bar is also provided with a sealing insulating layer.
8. The photovoltaic module of any of claims 1-7 wherein the sealing insulator layer covers the entire bus bar.
9. A method for the production of a photovoltaic module according to any one of claims 1 to 8, characterized in that it comprises:
and serially welding the cell pieces, the interconnection bars and the bus bars, arranging a sealing insulating layer at the joint of the interconnection bar led out of the positive electrode of the cell piece and the bus bar welding strip region, and laminating the sealing insulating layer with the first glass layer and the second glass layer to obtain the photovoltaic module.
10. The preparation method according to claim 9, comprising the following steps:
paving a first adhesive sealing layer on the surface of a first glass layer;
(II) serially welding the battery pieces, the interconnection bars and the bus bars, and after sealing insulating layers are attached to welding areas of the interconnection bars and the bus bars and welding areas of the jumper wires and the bus bars, arranging and positioning the battery pieces, the interconnection bars and the bus bars on a first glass layer paved with a first adhesive layer;
and (III) laying a second adhesive sealing layer, covering and laminating a second glass layer, and preparing the photovoltaic module.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116840147A (en) * | 2023-07-20 | 2023-10-03 | 天合光能股份有限公司 | Sealant bonding performance test pieces and test methods |
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| WO2013183395A1 (en) * | 2012-06-04 | 2013-12-12 | シャープ株式会社 | Solar battery module, and method of manufacturing solar battery module |
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