CN113540261A - Insulating layer for back contact solar cell module - Google Patents
Insulating layer for back contact solar cell module Download PDFInfo
- Publication number
- CN113540261A CN113540261A CN202110778829.4A CN202110778829A CN113540261A CN 113540261 A CN113540261 A CN 113540261A CN 202110778829 A CN202110778829 A CN 202110778829A CN 113540261 A CN113540261 A CN 113540261A
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- Prior art keywords
- adhesive film
- insulating layer
- solar cell
- cell module
- back contact
- 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.)
- Pending
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- 239000002313 adhesive film Substances 0.000 claims abstract description 79
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 239000004611 light stabiliser Substances 0.000 claims abstract description 17
- 239000003292 glue Substances 0.000 claims abstract description 16
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 14
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 14
- 230000002745 absorbent Effects 0.000 claims abstract description 10
- 239000002250 absorbent Substances 0.000 claims abstract description 10
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 10
- 238000010030 laminating Methods 0.000 claims abstract description 7
- 229920006124 polyolefin elastomer Polymers 0.000 claims abstract description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000007888 film coating Substances 0.000 claims description 10
- 238000009501 film coating Methods 0.000 claims description 10
- 229920013716 polyethylene resin Polymers 0.000 claims description 9
- 239000006229 carbon black Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000004408 titanium dioxide Substances 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000004070 electrodeposition Methods 0.000 abstract description 4
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000006059 cover glass Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
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- 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
- H01L31/02—Details
- H01L31/0216—Coatings
- H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02167—Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/02168—Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells the coatings being antireflective or having enhancing optical properties for the solar cells
-
- 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
- H01L31/0516—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 specially adapted for interconnection of back-contact solar cells
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Sustainable Energy (AREA)
- Photovoltaic Devices (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides an insulating layer for a back contact solar cell module; the solar cell comprises a first adhesive film, an intermediate plate and a second adhesive film, wherein the intermediate plate is a PET (polyethylene terephthalate) plate, adhesive film raw materials are formed on the front surface of the intermediate plate through high-temperature laminating to form the first adhesive film, the first adhesive film is positioned on the end surface of the intermediate plate close to one side of a solar cell, the adhesive film raw materials are formed on the reverse surface of the intermediate plate through high-temperature laminating to form the second adhesive film, and the second adhesive film is positioned on the end surface of the intermediate plate close to one side of a conductive back plate; wherein, the glue film raw materials at least comprise the following raw materials: 50-90 parts of modified polyolefin elastomer, 1-5 parts of fluorescent agent, 0.1-1 part of light stabilizer and 0.1-1 part of ultraviolet absorbent. The insulating layer has a three-layer structure, the number of layers of the insulating layer is reduced, the total thickness of the insulating layer is further reduced, the insulating layer obtains better thermal stability, and the problem of dislocation between the hole position of the insulating layer and the electrode position of the solar cell piece can be avoided.
Description
Technical Field
The invention relates to an insulating layer for a back contact solar cell module.
Background
As shown in fig. 1, the solar cell module sequentially comprises a cover glass 1, an EVA layer 2, solar cells 3, an insulating layer 4, a conductive layer 5, an EVA layer 2 and a back plate 6, wherein the cover glass 1 provides protection for the back contact solar cell module, the EVA layer 2 is used for bonding and fixing a plurality of solar cells 3, the solar cells 3 directly convert light energy into electric energy through photoelectric effect, the insulating layer 4 is used for insulating between the solar cells 3 and the conductive layer 5, and the conductive layer 5 establishes electrical connection between any two solar cells 3.
As shown in fig. 2, the conventional insulating layer includes a PET plate 41a and two layers of modified PVB plates 43a, the PET plate 41a and the modified PVB plates 43a are bonded and fixed by an adhesive 42a, and the layer structure from top to bottom sequentially includes: modified PVB sheet 43a, adhesive 42a, PET sheet 41a, adhesive 42a, modified PVB sheet 43 a. Because the insulating layer 4 is arranged between the cell 3 and the conducting layer 5, the surface of the insulating layer 3 needs to be provided with holes corresponding to the electrode positions of the solar cell 3, and the aperture is about 2.5-5 mm. However, since the modified PVB sheet 43a in the conventional insulating layer 4 is not thermally stable enough and is supported by the PET sheet 41a completely, when the temperature changes, the modified PVB sheet 43a shrinks greatly, and the modified PVB sheet 43a exerts a reaction force on the PET sheet 41a, causing a misalignment between the hole position and the electrode position of the solar cell 3.
Disclosure of Invention
The invention aims to provide an insulating layer for a back contact solar cell module, which has a reasonable structure and good thermal stability.
In order to solve the above technical problems, the present invention provides an insulating layer for a back contact solar cell module;
the solar cell comprises a first adhesive film, an intermediate plate and a second adhesive film, wherein the intermediate plate is a PET (polyethylene terephthalate) plate, adhesive film raw materials are formed on the front surface of the intermediate plate through high-temperature laminating to form the first adhesive film, the first adhesive film is positioned on the end surface of the intermediate plate close to one side of a solar cell, the adhesive film raw materials are formed on the reverse surface of the intermediate plate through high-temperature laminating to form the second adhesive film, and the second adhesive film is positioned on the end surface of the intermediate plate close to one side of a conductive back plate;
wherein, the glue film raw materials at least comprise the following raw materials:
50-90 parts of modified polyolefin elastomer, 1-5 parts of fluorescent agent, 0.1-1 part of light stabilizer and 0.1-1 part of ultraviolet absorbent.
Preferably, the modified polyolefin elastomer comprises at least one of polypropylene resin and polyethylene resin.
Preferably, the ultraviolet absorber includes at least one of an ultraviolet absorber UV326, an ultraviolet absorber UV328, an ultraviolet absorber UV329, and an ultraviolet absorber UV 531.
The light stabilizer preferably comprises at least one of light stabilizer GW-770, light stabilizer GW-994 and light stabilizer 622.
Preferably, the phosphor comprises Y as an insulating layer of the back contact solar cell module2O3：Eu3 +、(Sr2.85Eu0.15)(Al2O5)Cl2、Y3A5O12：Ce3+：Ce、(Y,Gd)BO3：Eu3+、NaYF4：Eu3+、NaYF4：Yb3+，Pr3+And GdAl3(BO3)4：Yb3+，Tb3+Wherein the median particle diameter D50 is 10-100 nm.
As the optimization of the insulating layer for the back contact solar cell module, the adhesive film raw material also comprises 2-4 parts by weight of a light shielding agent, and the light shielding agent is titanium dioxide or carbon black.
Preferably, the light shielding agent in the adhesive film raw material used for the first adhesive film is carbon black, and the light shielding agent in the adhesive film raw material used for the second adhesive film is titanium dioxide.
As the optimization of the insulating layer for the back contact solar cell module, the thickness of the middle plate is 50-180 mu m, and the thickness of the first adhesive film or the second adhesive film is 5-40 mu m.
Preferably, the first adhesive film or the second adhesive film is formed on the middle plate through high-temperature laminating, and the peel strength is not less than 4N.cm after cooling.
After adopting such structure, this an insulating layer for back contact solar module has three layer construction, has reduced the number of piles of insulating layer, and then has reduced the gross thickness of insulating layer to the insulating layer has obtained better heat stability, can not appear the problem of dislocation between insulating layer hole position and the solar wafer electrode position.
In addition, sunlight penetrates through cover plate glass, an EVA layer and a solar cell piece of the solar cell module to reach the insulated infrared light, the first adhesive film is black due to the addition of a light shielding agent carbon black, the second adhesive film is white due to the addition of a light shielding agent titanium dioxide, the first adhesive film and the second adhesive film convert infrared light into visible light after absorbing the infrared light, and the generated power of the solar cell piece is increased by 1-1.5% after the visible light is reflected.
Drawings
Fig. 1 is a schematic diagram of a layer structure of a back contact solar cell module in the prior art.
Fig. 2 is a schematic layer structure of an insulating layer in the prior art.
FIG. 3 is a schematic layer structure diagram of a first embodiment of an insulating layer for a back contact solar cell module.
Detailed Description
Example one
As shown in fig. 3
The insulating layer 4 for the back contact solar cell module in the present embodiment includes a first adhesive film 44, an intermediate plate 41, and a second adhesive film 45.
The middle plate 41 is a PET plate, the adhesive film raw material is formed on the front surface of the middle plate 41 through high-temperature film coating to form a first adhesive film 44, and the first adhesive film 44 is located on the end surface of the middle plate 41 close to the solar cell side.
The adhesive film raw material used for the first adhesive film 44 includes the following raw materials:
50 parts by weight of polyethylene resin, 1 part by weight of Y2O3：Eu3+0.1 part by weight of light stabilizer GW-770, 0.1 part by weight of ultraviolet absorber UV326, 2 parts by weight of carbon black, and the phosphor with a median particle diameter D50 of 50 nm.
And (3) forming the glue film raw material on the reverse surface of the middle plate 41 through high-temperature film coating to form a second glue film 45, wherein the second glue film 45 is positioned on the end surface of one side, close to the conductive back plate, of the middle plate 41.
The adhesive film raw materials used for the second adhesive film 45 include the following raw materials:
50 parts by weight of polyethylene resin, 1 part by weight of Y2O3：Eu3+0.1 part by weight of light stabilizer GW-770, 0.1 part by weight of ultraviolet absorbent UV326 and 2 parts by weight of titanium dioxide, wherein the median particle diameter D50 of the fluorescent agent is 50 nm.
The thickness of the middle plate 41 of the insulating layer 4 is 90 mu m +/-20 mu m, the thickness of the first adhesive film 44 and the second adhesive film 45 is 25 +/-5 mu m, the first adhesive film 44 or the second adhesive film 45 is formed on the middle plate 41 through high-temperature film coating, and the peel strength is not less than 4N.cm after cooling.
Example two
The insulating layer 4 for the back contact solar cell module in the present embodiment includes a first adhesive film 44, an intermediate plate 41, and a second adhesive film 45.
The middle plate 41 is a PET plate, the adhesive film raw material is formed on the front surface of the middle plate 41 through high-temperature film coating to form a first adhesive film 44, and the first adhesive film 44 is located on the end surface of the middle plate 41 close to the solar cell side.
The adhesive film raw material used for the first adhesive film 44 includes the following raw materials:
90 parts by weight of a mixture of polyethylene resin and polypropylene resin (the weight ratio of the polyethylene resin to the polypropylene resin is 1:1), 5 parts by weight of GdAl3(BO3)4：Yb 3+1 part by weight of a light stabilizer 622, 1 part by weight of an ultraviolet absorber UV531, 3 parts by weight of carbon black, and a phosphor having a median particle diameter D50 of 50 nm.
And (3) forming the glue film raw material on the reverse surface of the middle plate 41 through high-temperature film coating to form a second glue film 45, wherein the second glue film 45 is positioned on the end surface of one side, close to the conductive back plate, of the middle plate 41.
The adhesive film raw materials used for the second adhesive film 45 include the following raw materials:
90 parts by weight of a mixture of polyethylene resin and polypropylene resin, 5 parts by weight of GdAl3(BO3)4：Yb 3+1 part by weight of light stabilizer 622, 1 part by weight of ultraviolet absorber UV531, 3 parts by weight of titanium dioxide, and the median particle size D50 of the fluorescent agent is 50 nm.
The thickness of the middle plate 41 of the insulating layer 4 is 180 mu m +/-20 mu m, the thickness of the first adhesive film 44 and the second adhesive film 45 is 40 +/-5 mu m, the first adhesive film 44 or the second adhesive film 45 is formed on the middle plate 41 through high-temperature film coating, and the peel strength is not less than 4N.cm after cooling.
EXAMPLE III
The insulating layer 4 for the back contact solar cell module in the present embodiment includes a first adhesive film 44, an intermediate plate 41, and a second adhesive film 45.
The middle plate 41 is a PET plate, the adhesive film raw material is formed on the front surface of the middle plate 41 through high-temperature film coating to form a first adhesive film 44, and the first adhesive film 44 is located on the end surface of the middle plate 41 close to the solar cell side.
The adhesive film raw material used for the first adhesive film 44 includes the following raw materials:
70 parts by weight of polypropylene resin and polyethylene resin, 4 parts by weight of (Y, Gd) BO3：Eu3+0.5 parts by weight of light stabilizer GW-994, 0.5 parts by weight of ultraviolet absorber UV328, 3 parts by weight of carbon black, and the fluorescent agent has a median particle diameter D50 of 50 nm.
And (3) forming the glue film raw material on the reverse surface of the middle plate 41 through high-temperature film coating to form a second glue film 45, wherein the second glue film 45 is positioned on the end surface of one side, close to the conductive back plate, of the middle plate 41.
70 parts by weight of polypropylene resin, 4 parts by weight of polyethylene resin(Y, Gd) BO in parts by weight3：Eu3+0.5 part of light stabilizer GW-994, 0.5 part of ultraviolet absorbent UV328 and 3 parts of titanium dioxide, wherein the median particle size D50 of the fluorescent agent is 50 nm.
The thickness of the middle plate 41 of the insulating layer 4 is 120 mu m +/-20 mu m, the thickness of the first adhesive film 44 and the second adhesive film 45 is 30 +/-5 mu m, the first adhesive film 44 or the second adhesive film 45 is formed on the middle plate 41 through high-temperature film coating, and the peel strength is not less than 4N.cm after cooling.
Taking the insulating layer 4 for the back contact solar cell module in example three as an example, the detection results are as follows:
therefore, the insulating layer 4 obtained in the embodiment is generally stronger than the insulating layer in the prior art in all indexes, and the performance of the thermal shrinkage parameter is greatly improved compared with the insulating layer in the prior art, and the embodiments one and two also have similar technical effects.
The above description is only three embodiments of the present invention, and it should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the principle of the present invention, and these should also be considered as falling within the protection scope of the present invention.
Claims (9)
1. An insulating layer for a back contact solar cell module, characterized by:
the solar cell comprises a first adhesive film, an intermediate plate and a second adhesive film, wherein the intermediate plate is a PET (polyethylene terephthalate) plate, adhesive film raw materials are formed on the front surface of the intermediate plate through high-temperature laminating to form the first adhesive film, the first adhesive film is positioned on the end surface of the intermediate plate close to one side of a solar cell, the adhesive film raw materials are formed on the reverse surface of the intermediate plate through high-temperature laminating to form the second adhesive film, and the second adhesive film is positioned on the end surface of the intermediate plate close to one side of a conductive back plate;
wherein, the glue film raw materials at least comprise the following raw materials:
50-90 parts of modified polyolefin elastomer, 1-5 parts of fluorescent agent, 0.1-1 part of light stabilizer and 0.1-1 part of ultraviolet absorbent.
2. The insulating layer for a back contact solar cell module of claim 1, wherein:
the modified polyolefin elastomer comprises at least one of polypropylene resin and polyethylene resin.
3. The insulating layer for a back contact solar cell module of claim 1, wherein:
the ultraviolet absorbent comprises at least one of ultraviolet absorbent UV326, ultraviolet absorbent UV328, ultraviolet absorbent UV329 and ultraviolet absorbent UV 531.
4. The insulating layer for a back contact solar cell module of claim 1, wherein:
the light stabilizer comprises at least one of light stabilizer GW-770, light stabilizer GW-994 and light stabilizer 622.
5. The insulating layer for a back contact solar cell module of claim 1, wherein:
said fluorescent agent comprises Y2O3：Eu3+、(Sr2.85Eu0.15)(Al2O5)Cl2、Y3A5O12：Ce3+：Ce、(Y,Gd)BO3：Eu3 +、NaYF4：Eu3+、NaYF4：Yb3+，Pr3+And GdAl3(BO3)4：Yb3+，Tb3+Wherein the median particle diameter D50 is 10-100 nm.
6. The insulating layer for a back contact solar cell module of claim 1, wherein:
the adhesive film raw material also comprises 2-4 parts by weight of a light shielding agent, and the light shielding agent is titanium dioxide or carbon black.
7. The insulating layer for a back contact solar cell module of claim 6, wherein:
the light shielding agent in the glue film raw material used by the first glue film is carbon black, and the light shielding agent in the glue film raw material used by the second glue film is titanium dioxide.
8. The insulating layer for a back contact solar cell module of claim 1, wherein:
the thickness of the middle plate is 50-180 μm, and the thickness of the first adhesive film or the second adhesive film is 5-40 μm.
9. The insulating layer for a back contact solar cell module of claim 1, wherein:
and the first adhesive film or the second adhesive film is formed on the middle plate through high-temperature film coating, and the peel strength is not less than 4N.cm after cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110778829.4A CN113540261A (en) | 2021-07-09 | 2021-07-09 | Insulating layer for back contact solar cell module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110778829.4A CN113540261A (en) | 2021-07-09 | 2021-07-09 | Insulating layer for back contact solar cell module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113540261A true CN113540261A (en) | 2021-10-22 |
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ID=78127285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110778829.4A Pending CN113540261A (en) | 2021-07-09 | 2021-07-09 | Insulating layer for back contact solar cell module |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004247390A (en) * | 2003-02-12 | 2004-09-02 | Dainippon Printing Co Ltd | Rear face protecting sheet for solar cell module, and solar cell module using it |
| CN203967100U (en) * | 2014-06-18 | 2014-11-26 | 南京日托光伏科技有限公司 | A kind of back contact solar battery assembly |
| CN104205356A (en) * | 2012-03-30 | 2014-12-10 | 凸版印刷株式会社 | Back contact type solar cell module |
| KR20160012525A (en) * | 2014-07-24 | 2016-02-03 | 주식회사 엘지화학 | Transparent sheet for light module, method for manufacturing the same and light module comprising the same |
-
2021
- 2021-07-09 CN CN202110778829.4A patent/CN113540261A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004247390A (en) * | 2003-02-12 | 2004-09-02 | Dainippon Printing Co Ltd | Rear face protecting sheet for solar cell module, and solar cell module using it |
| CN104205356A (en) * | 2012-03-30 | 2014-12-10 | 凸版印刷株式会社 | Back contact type solar cell module |
| CN203967100U (en) * | 2014-06-18 | 2014-11-26 | 南京日托光伏科技有限公司 | A kind of back contact solar battery assembly |
| KR20160012525A (en) * | 2014-07-24 | 2016-02-03 | 주식회사 엘지화학 | Transparent sheet for light module, method for manufacturing the same and light module comprising the same |
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