CN106684185A - Solar cell module - Google Patents
Solar cell module Download PDFInfo
- Publication number
- CN106684185A CN106684185A CN201610082712.1A CN201610082712A CN106684185A CN 106684185 A CN106684185 A CN 106684185A CN 201610082712 A CN201610082712 A CN 201610082712A CN 106684185 A CN106684185 A CN 106684185A
- Authority
- CN
- China
- Prior art keywords
- glass
- backplate
- composition
- solar
- solar modules
- 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
Links
- 239000011521 glass Substances 0.000 claims abstract description 215
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 90
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 71
- 229910052742 iron Inorganic materials 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 48
- 239000000203 mixture Substances 0.000 claims description 45
- 230000006835 compression Effects 0.000 claims description 41
- 238000007906 compression Methods 0.000 claims description 41
- 238000005728 strengthening Methods 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 17
- 230000033228 biological regulation Effects 0.000 claims description 16
- 238000004017 vitrification Methods 0.000 claims description 16
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 15
- 239000000565 sealant Substances 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 6
- 238000002834 transmittance Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000007496 glass forming Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 15
- 238000011282 treatment Methods 0.000 description 15
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 14
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 12
- 230000003014 reinforcing effect Effects 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 208000019901 Anxiety disease Diseases 0.000 description 9
- 230000036506 anxiety Effects 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000013078 crystal Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 229910052681 coesite Inorganic materials 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 229910052906 cristobalite Inorganic materials 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- 229910052682 stishovite Inorganic materials 0.000 description 7
- 229910052905 tridymite Inorganic materials 0.000 description 7
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 6
- 238000006124 Pilkington process Methods 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 229910052593 corundum Inorganic materials 0.000 description 6
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 6
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 description 6
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000005361 soda-lime glass Substances 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 230000032258 transport Effects 0.000 description 4
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 3
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 238000004031 devitrification Methods 0.000 description 3
- 238000005342 ion exchange Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000007500 overflow downdraw method Methods 0.000 description 3
- 238000009738 saturating Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 238000013084 building-integrated photovoltaic technology Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 230000001151 other effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000005368 silicate glass Substances 0.000 description 2
- 238000002798 spectrophotometry method Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 229910004613 CdTe Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003280 down draw process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006025 fining agent Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- GTTYPHLDORACJW-UHFFFAOYSA-N nitric acid;sodium Chemical compound [Na].O[N+]([O-])=O GTTYPHLDORACJW-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 208000007578 phototoxic dermatitis Diseases 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- 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
- H01L31/048—Encapsulation of modules
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
-
- 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
- H01L31/048—Encapsulation of modules
- H01L31/0488—Double glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2201/00—Glass compositions
- C03C2201/06—Doped silica-based glasses
- C03C2201/30—Doped silica-based glasses containing metals
- C03C2201/32—Doped silica-based glasses containing metals containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2201/00—Glass compositions
- C03C2201/06—Doped silica-based glasses
- C03C2201/30—Doped silica-based glasses containing metals
- C03C2201/54—Doped silica-based glasses containing metals containing beryllium, magnesium or alkaline earth metals
-
- 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
Abstract
The ivnention provides a solar cell module which has good weather resistance and appearance, and reduces cost of manufacturing, transporting and constructing same. The solar cell module, from a light receiving side to a backlight side, successively includes a light receiving panel, a solar cell unit, and a solar cell module body on a backside panel. The solar cell module body is provided with a sealing layer which seals the solar cell unit and is arranged between the light receiving panel and the backside panel. The light receiving panel is chem-reinforced glass, physic-reinforced glass, or non-reinforced glass. The backside panel is physic-reinforced glass. The glass forming the light receiving panel is lower than 3000 ppm by mass in total iron content on the basis of Fe2O3, and the glass forming the backside panel is higher than 3000 ppm by mass in total iron content on the basis of Fe2O3. The thickness of the backside panel is lower than 2.5 mm.
Description
Technical field
The present invention relates to solar module.
Background technology
Patent document 1 discloses that possess the light surface side for being configured at crystal class solar battery cell by chemical enhanced glass
Glass constitute the first glass substrate (light panel), be configured at crystal class solar battery cell rear side by chemical enhanced
The second glass substrate (backplate) and crystal class solar-electricity is sealed between the first and second glass substrate that glass is constituted
The solar module of the sealing resin of pool unit.
Compared with overleaf side using the solar module of resin masking (backboard), as described in patent document 1
Solar module there is like that the solar module of structure that two sides clamp by glass can prevent from from outside invading
Moisture, weatherability it is excellent, it is high to the stability chemically of soda acid etc. additionally, intensity physically is high, without ultraviolet
Color-shifting colorant during irradiation etc., can extend battery life.
But, the structure clamped by glass with two sides as the solar module described in patent document 1
Solar module, the distribution due to the rear side for being configured at crystal class solar battery cell can be seen from backplate side
Deng, therefore there is a problem of that aesthetic property is poor.Therefore, in IPV (Building Integrated Photovoltaics, building collection
Into photovoltaic), the shop front, skylight, bicycle shed, the human eye such as shutter can and, have high demands in the purposes of aesthetic property, in solar battery cell
Rear side need masking with film or printed, or need using expensive generating electricity on two sides type solar battery cell.
In the solar module described in patent document 1, based on it is following the reasons why, using by chemically reinforced glass
The glass substrate of composition is used as light panel and backplate.
Solar module is required to can tolerate the harsh environment such as blast, sometimes accumulated snow, sandstorm or hail
Very strong intensity.In the case of using common physical strengthening glass as the cover glass of solar module, such as
The thickness of thin of fruit glass is then difficult to apply the enough residual stress for reinforcing, needs the thickness of slab of more than 3mm.Thus, it is supposed that
In the case of the thin glass low using residual stress of side, in order to ensure the intensity of solar module, needs make contrary
The glass of side is thickening, makes overall weight become big.
If the overall weight of solar module becomes big, due to solar module manufacturing process cost,
Solar module transport when or construction when cost increase and it is not preferred.Additionally, situations such as skylight, bicycle shed
Lower to have high demands load resistance energy to the fabrication of loading assembly if lightweight packages are big, the cost of fabrication becomes big or can fill
The works of load is limited.Solar module, especially in the solar module for being the structure that two sides is clamped by glass
In the case of, because the weight of glass substrate accounts for the more than half of lightweight packages, therefore make the advantage that glass substrate is thinning, become light weight
It is very big.If using chemically reinforced glass, even the thickness of slab of 1mm or so can also apply enough residual stress.
However, because chemically reinforced glass is than physical strengthening glass costliness, therefore make as light panel and backplate
It is expensive with the solar module described in the patent document 1 of chemically reinforced glass.
Prior art literature
Patent document
Patent document 1：Japanese Patent Laid-Open 2013-247238 publication
The content of the invention
Invent technical problem to be solved
The present invention be in view of above-mentioned problem and the invention that completes, its object is to provide weatherability and aesthetic property are excellent,
And when can reduce manufacture, transport when, construction when cost solar module.
Solve the technical scheme that technical problem is adopted
To achieve these goals, the present invention provides a kind of solar module, it is characterised in that with from sensitive surface
Lateral rear side possesses successively the solar module main body of light panel, solar battery cell, backplate,
Above-mentioned solar module main body has the above-mentioned sun of sealing between above-mentioned light panel and above-mentioned backplate
The sealant of energy battery unit,
Above-mentioned light panel is chemically reinforced glass, physical strengthening glass or nonreinforcement glass,
Above-mentioned backplate is physical strengthening glass,
In the glass of above-mentioned composition light panel, with Fe2O3The total iron content of expression is less than 3000 mass ppm,
In the glass of above-mentioned composition backplate, with Fe2O3The total iron content of expression more than 3000 mass ppm,
The thickness of slab of above-mentioned backplate is in below 2.5mm.
Hereinafter, quality ppm is outlined as ppm.
In the solar module of the present invention, in the glass of above-mentioned composition backplate, Fe3+Content is with Fe2O3Conversion meter,
It is preferred that in more than 3000ppm.
In the solar module of the present invention, the visible ray of preferred ISO-9050 (2003) regulation of above-mentioned light panel is saturating
Rate (D65 light sources) (below, being also denoted as Tv_D65) is penetrated more than 90%.
In the solar module of the present invention, the preferred transmission of visible light Tv_D65 of above-mentioned backplate is less than 90%, more
It is preferred that less than 89%.
In the solar module of the present invention, situation of the above-mentioned backplate in transmission of visible light Tv_D65 more than 50%
Under, in the L*a*b colour spaces of CIE1976 standards, preferred a*≤10 and b*≤20, more preferably a*≤5 and b*≤15.
In the solar module of the present invention, the glass of above-mentioned composition backplate is preferably with quality % of oxide benchmark
Represent, contain
In the solar module of the present invention, the glass of above-mentioned composition backplate is preferably average at 50～350 DEG C
Thermalexpansioncoefficientα50～35070 × 10-7/ DEG C more than 110 × 10-7/ DEG C below, vitrification point more than 500 DEG C, vitrifying
Maximum α of the thermal coefficient of expansion between temperature and yield pointmax400 × 10-7/ DEG C more than.
In the solar module of the present invention, the glass preferred surface compression stress of above-mentioned composition backplate is in 110MPa
More than.
In the solar module of the present invention, in the case where the thickness of slab of above-mentioned backplate is below 2.0mm, constituting should
The glass preferred surface compression stress of backplate is more than 70MPa.
Additionally, in the case where the thickness of slab of above-mentioned backplate is below 1.5mm, constituting the glass preferred surface of the backplate
Compression stress is more than 60MPa.
In the solar module of the present invention, the ultraviolet (uv) transmission of preferred ISO-9050 (2003) regulation of above-mentioned backplate
Rate (below, being also denoted as Tuv) is less than 70%.
In the solar module of the present invention, the solar radiation of preferred ISO-13837A (2008) regulation of above-mentioned backplate
Transmissivity (below, being also denoted as Te) is less than 85%.
The effect of invention
The present invention solar module due to by physical strengthening glass be used for backplate, therefore, it is possible to be carried with low cost
For weatherability is excellent and the solar module with sufficient intensity of light weight.
In the solar module of the present invention, due to constituting the glass of backplate with Fe2O3The total iron content of expression exists
More than 3000ppm, even if therefore thickness of slab also can form the big compression stress of residual stress in below 2.5mm by physical strengthening
Layer.Therefore, it is capable of achieving the lightweight of solar module.Thereby, when can reduce the manufacture of solar module, transport
When, construction when cost.Further, since the thickness of slab of the glass of backplate is constituted in below 2.5mm, therefore, it is possible to realize solar energy
The lightweight of battery component.Therefore, be also adaptable as the roof of large solar generating institute or house factory is made with component
With.
Further, since constituting the glass of backplate with Fe2O3The total iron content of expression is in more than 3000ppm, therefore visible ray
Transmissivity declines.As a result, be configured at distribution of the rear side of crystal class solar battery cell etc. being difficult from backplate side
See, aesthetic property is improved.Further, since ultraviolet (UV) transmissivity and solar radiation (IR) transmissivity decline, thus BIPV,
Skylight, bicycle shed etc. are reached in the purposes of living space by the light of solar module, can also play heat-proof quality raising,
It is sun-proof and other effects.
Further, since the thickness of slab of the glass of backplate is constituted in below 2.5mm, therefore in the sealing of solar module
In formation (lamination) operation of layer, there are decline, shortening of heat time of heating-up temperature etc. to reduce the effect of manufacturing process burden.
In addition, although backplate needs the processing such as perforate or the cut-out shape for being largely used to taking-up distribution, but due to constituting the backplate
The thickness of slab of glass plate be as thin as below 2.5mm, therefore process time can be shortened.Additionally, implementing these by laser machining
In the case of processing, due to constituting the glass of backplate with Fe2O3The total iron content of expression is not only in more than 3000ppm
The light transmittance of the wave-length coverage of transmission of visible light and ultraviolet light (UV) and infrared light (IR) is also low, therefore laser wave
Long absorption is high, can expect the shortening of process time.
Description of the drawings
Fig. 1 is the top view of the solar module of the present invention.
Fig. 2 is the sectional view of the solar module of the present invention.
Fig. 3 is the plan at the position of the cooling nozzle for arranging the air-cooled strengthening device that embodiment is used.
Fig. 4 is to represent the total iron content (Fe in embodiment2O3Conversion) and apparent surface's compression stress value relation figure.
Fig. 5 is to represent the total iron content (Fe in embodiment2O3Conversion) and αmaxRelation figure.
Specific embodiment
Hereinafter, referring to the drawings to illustrating for implementing mode of the invention, but in various figures, to identical or right
The structure answered marks identical or corresponding symbol, and omits the description.
Fig. 1 is the top view of the solar module of one embodiment of the present invention.Fig. 2 is an embodiment party of the present invention
The sectional view of the solar module of formula.
Solar module 10 from sensitive surface 10a it is lateral back side 10b sides there is successively light panel 11, solar energy
While battery unit 12, backplate 15, there is sealant 16 between light panel 11 and backplate 15.
Light panel 11 is on the basis of solar battery cell 12, to be configured at the plate of sensitive surface 10a sides.Light panel 11
There is translucency to sunshine.It is ingested solar battery cell 12 through the light of light panel 11.Also can be in light panel 11
Sensitive surface on form antireflection film.The light reflection in light panel 11 can be reduced, the intake efficiency of sunshine can be improved.Receiving
On the sensitive surface of optic panel 11, antiglare film can be also formed in addition to antireflection film.
Solar battery cell 12 is disposed between light panel 11 and backplate 15, converts light energy into electric energy.The sun
Energy battery unit 12 can be silicone (crystal class, film class), compounds (CIGS, GaAS, CdTe etc.), organic
Any one of (dye sensitization, organic film, perovskite etc.) etc..Can possess in 1 solar module main body 10 it is multiple too
Positive energy battery unit 12, multiple solar battery cells 12 are connected in series or parallel.
Backplate 15 is on the basis of solar battery cell 12, to be configured at the plate of back side 10b sides.Backplate 15 has anti-
It is aqueous etc..
Sealant 16 seals solar battery cell 12 between light panel 11 and backplate 15.Sealant 16 has saturating
Photosensitiveness, so as to solar battery cell 12 can be taken in through the light of light panel 11.Sealant 16 for example can be by vinyl acetate second
The thermosettings such as enoate copolymer (EVA), olefine kind resin, polyvinyl butyral resin (PVB), ionomer resin, organic siliconresin
The property changed resin, or thermoplastic resin is forming.
Sealant 16 is for example made up of sensitive surface side bonds layer 17 and rear side adhesive linkage 18.Sensitive surface side bonds layer 17 glues
Receive optic panel 11 and solar battery cell 12.The bonding solar battery cell 12 of rear side adhesive linkage 18 and backplate 15.
Bonding between sensitive surface side bonds layer 17 and rear side adhesive linkage 18 by configuring solar battery cell 12 simultaneously
It is heat-treated to carry out.Sensitive surface side bonds layer 17 and rear side adhesive linkage 18 can be formed by different materials, also can be by identical
Material is formed, so that it can the integration by heat treatment.
Additionally, in the case where sensitive surface side bonds layer 17 and rear side adhesive linkage 18 are formed by different materials, light
Surface side adhesive linkage 17 has translucency, and rear side adhesive linkage 18 can not have translucency.
Solar module 10 can also have the structure beyond diagram.For example, solar module 10 can make aluminium
Framework or lid Deng metal system or resin material is assemblied in component peripheral part.Additionally, can overleaf plate 15 the back side
10b sides are provided for the back beam (Japanese of structural strengthening：バックレール).In the case where back beam is arranged, its quantity is not had
Limit, but single can also be multiple.
Light panel 11 and backplate 15 to constituting solar module main body 10 is more specifically recorded.
Light panel 11
The solar module of the present invention uses physical strengthening glass as backplate 15, though thickness of slab 2.5mm with
Under, also the big compressive stress layers of residual stress can be formed by physical strengthening, its detailed content is aftermentioned.Therefore, light panel 11
Can be using any one of chemically reinforced glass, physical strengthening glass, nonreinforcement glass.
Chemically reinforced glass is the glass that chemical intensification treatment is carried out to glass plate.As the side of chemical intensification treatment
Rule is if any ion-exchange etc..Ion-exchange is in treatment fluid (such as potassium nitrate fuse salt, nitric acid sodium fusion by glass-impregnated
Melt salt) in, the big ion (example of ionic radius is exchanged for by the little ion of the ionic radius for containing in glass (such as Na ions)
Such as K ions) and compression stress is produced on the glass surface.Compression stress is uniformly produced on the whole on the surface of glass, in glass
Surface generally form the compressive stress layers of uniform depth.
The size of the compression stress (hereinafter referred to as surface compression stress) of glass surface, the compression for being formed at glass surface
The depth of stressor layers can respectively by glass composition, the concentration for the treatment of fluid, chemical intensification treatment time and chemical intensification treatment
Temperature is adjusted.Surface compression stress is, for example, more than 200MPa, preferred more than 400MPa, further preferred 500MPa with
On.On the other hand, surface compression stress is, for example, below 1000MPa, preferred below 900MPa, further preferred 800MPa with
Under.The depth of compressive stress layers is, for example, more than 7 μm, preferably more than 15 μm, further preferred 25 μm.On the other hand, compression should
The depth of power layer is, for example, less than 100 μm, preferably less than 60 μm, further preferred less than 40 μm.
As long as glass obtained by chemically reinforced glass Jing ion exchanges, then do not limit, for example to alumina silicate glass,
Soda-lime glass, Lithium silicate glass etc. carry out glass obtained by chemical intensification treatment.
Physical strengthening glass is to carry out glass obtained by hot intensive treatment to glass plate, and composition is not particularly limited, only
The average coefficient of expansion α that vitrification point is wanted more than 500 DEG C, at 50～350 DEG C50～350For 70 × 10-7/ DEG C then preferably,
Soda-lime glass can for example be used.Temperature of the hot intensive treatment by the glass plate of uniform heating near softening point starts chilling, leads to
Compression stress is produced on the temperature official post glass surface for crossing glass surface and inside glass.As heat reinforcing, be with air-cooled reinforcing,
That is, the glass of tabular is manufactured by float glass process etc., after the temperature that the glass plate after cutting is heated near softening point or yield point,
The method that chilling is representative is carried out to surface spray cooling medium.Compression stress is uniformly produced on the whole on the surface of glass,
The surface of glass generally forms the compressive stress layers of uniform depth.Compared with chemical intensification treatment, hot intensive treatment is adapted to plate
The reinforcing of thicker glass plate.
In the case of physical strengthening glass, surface compression stress is, for example, more than 40MPa, and preferred more than 70MPa enters one
Walk preferred more than 100MPa.On the other hand, surface compression stress is, for example, below 250MPa, preferred below 200MPa, further
It is preferred that below 180MPa.It is about more than 10%, about the 25% of thickness of slab depending on the depth of known compressive stress layers is generally according to thickness of slab
Below.If the depth of surface compression stress and compressive stress layers is enough to as solar cell in above-mentioned scope
Component is used.
Non- strengthens glass is the glass after melten glass is shaped into tabular, annealing, especially to composition without limiting, for example
For soda-lime glass.As manufacturing process, float glass process, roll-in method, fusion method etc. can be enumerated, but from transmissivity, the sight of anti-reflection effect
Point sets out, preferred roll-in method.
The thickness of slab of light panel 11 is different according to the species of the glass used as light panel.Make as light panel
In the case of chemically reinforced glass, its thickness of slab is, for example, more than 0.5mm, preferred more than 0.7mm.On the other hand, its thickness of slab example
Such as it is below 2mm, preferred below 1.5mm.Physical strengthening glass is being used as light panel or using the feelings of non-strengthens glass
Under condition, its thickness of slab is, for example, more than 1mm.On the other hand, its thickness of slab is, for example, below 5mm, preferred below 2.5mm.
As described above, light panel 11 has translucency to sunshine.The preferred ISO-9050 (2003) of light panel 11 is advised
Fixed transmission of visible light (D65 light sources) Tv_D65 more than 90%, more preferably more than 91%, further preferred more than 92%.
In order to realize above-mentioned transmission of visible light, the glass of light panel 11 is constituted with Fe2O3The total iron content of expression is less than
3000ppm, preferably shorter than 1000ppm, more preferably less than 200ppm.
Backplate 15
Backplate 15 is the physical strengthening glass that thickness of slab is below 2.5mm.Thereby, excellent weather resistance and hard can be provided with low cost
Good and light weight the solar module with sufficient intensity.
Physical strengthening glass is that glass obtained by hot intensive treatment is carried out to glass plate, but because the hot intensive treatment is utilized
The temperature difference on surface and inside during cooling, so if thickness of thin can not then make the temperature difference of surface and inside become big, it is difficult to
Apply enough residual stress.For this point, the result that present inventor is conscientiously studied is to be found that improve
α can be increased in the case of the content of the iron of the glass of hot intensive treatmentmax, its result is the glass that improve the hot intensive treatments of Jing
Residual stress.
By making the glass of composition backplate 15 with Fe2O3The total iron content of expression is in more than 3000ppm, even if thickness of slab exists
Below 2.5mm, also can form the big compressive stress layers of residual stress by physical strengthening.
The glass of backplate 15 is constituted preferably with Fe2O3The total iron content of expression in more than 5000ppm, more preferably
More than 10000ppm, further preferred more than 20000ppm.
The iron contained in glass is used as ferrous iron (Fe2+) or ferric iron (Fe3+) exist, but improve heat by force to play
Change the above-mentioned effect in the case of the iron content of the glass for processing, in these preferred ferric iron (Fe3+) content it is high.Therefore,
Constitute the preferred Fe of glass of backplate 153+Content in more than 3000ppm, more preferably more than 5000ppm, further preferably
More than 10000ppm, further preferred more than 20000ppm.
Due to constituting the glass of backplate 15 with Fe2O3The total iron content of expression is in more than 3000ppm, therefore visible ray is saturating
Penetrate rate decline.As a result, be configured at distribution of the rear side of crystal class solar battery cell etc. being difficult from terms of backplate side
Arrive, aesthetic property is improved.Further, since ultraviolet (UV) transmissivity and solar radiation (IR) transmissivity decline, therefore in BIPV, room
Top etc. is reached in the purposes of living space by the light of solar module, can also play the raising of heat-proof quality, sun-proof etc.
Effect.
The preferred transmission of visible light Tv_D65 of backplate 15 is less than 90%, more preferably less than 89%, even more preferably below
85%, even more preferably below 80%.
The preferred ISO-9050 (2003) of backplate 15 regulation ultraviolet transmittance Tuv below 70%, more preferably 50%
Hereinafter, further preferred less than 30%.
The preferred ISO-9050 (2003) of backplate 15 regulation solar radiation transmissivity Te below 85%, more preferably 80%
Hereinafter, further preferred less than 70%.
The aspect of above-mentioned raising aesthetic property transmission of visible light be less than 50% it is sufficiently low in the case of need not spy
Do not note, but in the case where transmission of visible light is more than 50%, the tone of backplate 15 also becomes important.It is blue, green, grey
The glass of cool colour system tone is difficult and is configured at distribution of rear side of crystal class solar battery cell etc. and produces contrast, can
Improve aesthetic property.Additionally, the glass of blue, green, grey cool colour system tone due to as human eye can and color be also to bring steady
The color of sense, therefore aesthetic property can be improved.
Specifically, backplate 15 is in the L*a*b colour spaces of CIE1976 standards, from improving from the aspect of aesthetic property
It is preferred that a*≤10 and b*≤20, more preferably a*≤5 and b*≤15, further preferred a*≤0 and b*≤10.
In addition, in the L*a*b colour spaces of CIE1976 standards, it is partially red tone if to be if a*, it is that negative value is then
Partially green tone.B* be on the occasion of being then partially yellow tone, be negative value be then partially blue tone.
Because Fe also works as the composition coloured to glass, therefore in the glass for constituting backplate 15,
It is also preferred that with Fe in the case that the tone of backplate 15 meets above-mentioned condition2O3The total iron content of expression is in more than 3000ppm.
For glass of the thickness of slab for below 2.5mm for constituting backplate 15, due to being applied using common air-cooled intensifying device
Plus residual stress, therefore it is more than 500 DEG C to constitute the preferred vitrification point of glass of backplate 15.It is less than in vitrification point
In the case of 500 DEG C, it is difficult to make surface and internal with temperature difference by heating process and refrigerating work procedure, it is impossible to effectively give
Residual stress.
On the other hand, if vitrification point is too high, need to be heated to high temperature in heating process, for keeping constituting
Surrounding member of the glass of backplate 15 etc. is exposed under high temperature, therefore their life-span is possible to be remarkably decreased, in order to extend
In the life-span, need the high price component for using excellent heat resistance.Therefore, preferably less than 700 DEG C of vitrification point.
In addition ,+200 DEG C of the preferred vitrification point of the upper limit of temperature during heating process.If temperature during heating process
The upper limit it is higher than+200 DEG C of vitrification point, then glass easy VISCOUS FLOW deformation at high temperature, final strengthens glass
Optical quality has the anxiety of deterioration.
Additionally, the maximum of the thermal coefficient of expansion between the preferred vitrification point of glass and yield point of composition backplate 15
αmax(it is below, " high-temperature heat expansion factor alpha described in this specificationmax”.) it is 400 × 10-7/ DEG C more than.In high-temperature heat expansion
Factor alphamaxLess than 400 × 10-7/ DEG C in the case of, using common air-cooled intensifying device to constitute backplate 15 thickness of slab be
For the glass of below 2.5mm, having can not effectively give the anxiety of residual stress.Generally, air-cooled reinforcing is by from higher than glass
Change the temperature chilling of 100 DEG C or so of temperature carrying out.By making high-temperature heat expansion factor alphamaxFor 400 × 10-7/ DEG C more than, by this
The temperature of sample, can use the glass that common air-cooled intensifying device is below 2.5mm to the thickness of slab for constituting backplate 15 effectively
Give residual stress.
Herein, high-temperature heat expansion factor alphamaxRefer in the swollen of the processed glass for being determined by dilatometer as described later
In swollen coefficient curve, maximum of the thermal coefficient of expansion between vitrification point and yield point.High-temperature heat expansion factor alphamaxFrom tax
Give more big then more preferred from the viewpoint of residual stress, but generally have 600 × 10-7/ DEG C then enough.If additionally, high warm is swollen
Swollen factor alphamaxBecome big, then cooling down the temporary transient deformation of just interim generation can cause glass rupture, make yield rate be deteriorated, therefore high temperature
ThermalexpansioncoefficientαmaxIt is preferred that 400 × 10-7/ DEG C more than 600 × 10-7/ DEG C below.
For the yield point of the glass for constituting backplate 15 not necessarily must be defined, but preferably greater than 600 DEG C.Bending
In the case that clothes point is less than 600 DEG C, when the glass plate of cut-out to be heated to the temperature near softening point or yield point, heating
Temperature, i.e. start strengthen temperature step-down, having can not effectively give the anxiety of residual stress.Yield point is preferably below 850 DEG C.Such as
Fruit yield point then needs to be heated to high temperature more than 850 DEG C, for keeping constituting the exposures such as the surrounding member of glass of backplate 15
Under high temperature, therefore their life-span is possible to be remarkably decreased, and in order to extend the life-span, needs the high price structure for using excellent heat resistance
Part.Constitute more preferably less than 750 DEG C, further preferred less than 700 DEG C of the yield point of the glass of backplate 15.
Constitute average thermal expansion of the glass of backplate 15 from giving preferably 50～350 DEG C from the viewpoint of residual stress
Factor alpha50～350It is larger, but if excessive, produce and the unmatched problem of the expansion of other current components, it is possible to heat punching
Hit and die down.Therefore, mean thermal expansion coefficients α of the glass of backplate 15 at 50～350 DEG C is constituted50～350It is preferred that 70 × 10-7/
More than DEG C, more preferably 80 × 10-7/ DEG C more than.On the other hand, the mean thermal expansion coefficients α at 50～350 DEG C50～350It is preferred that 110
×10-7/ DEG C below, more preferably 100 × 10-7/ DEG C below, further preferred 95 × 10-7/ DEG C below.
Constitute the preferred high-temperature heat expansion factor alpha of glass of backplate 15maxWith the mean thermal expansion coefficients at 50～350 DEG C
α50～350Coefficient of thermal expansion differences (Δ α (=αmax-α50～350)) 300 × 10-7/ DEG C more than.Thermal expansion from low temperature to high temperature
Coefficient, i.e. high-temperature heat expansion factor alphamax, and the mean thermal expansion coefficients α at 50～350 DEG C50～350Become big situation merely
Under, when heating process and refrigerating work procedure, be susceptible to rupture and the thermal expansion of other components caused by thermal shock not
With inadaptable etc. with current technique.
By making coefficient of thermal expansion differences (Δ α) 300 × 10-7/ DEG C more than, i.e., by making the evenly heat at 50～350 DEG C
Coefficient of expansion α50～350It is constant, make high-temperature heat expansion factor alphamaxRelative to become big, using, common air-cooled intensifying device is effective
While ground gives residual stress to the thickness of slab for constituting backplate 15 for the glass of below 2.5mm, may also suppress thermal shock causes
Rupture etc. occur.Coefficient of thermal expansion differences (Δ α) more preferably 315 × 10-7/ DEG C more than, further preferred 330 × 10-7/ DEG C with
On, particularly preferred 350 × 10-7/ DEG C more than, most preferably 360 × 10-7/ DEG C more than.Coefficient of thermal expansion differences (Δ α) is substantially bigger
It is better, but usually 500 × 10-7/ DEG C i.e. enough.
Herein, vitrification point, yield point, thermal coefficient of expansion (αmax、α50～350) be measured according to following main points.
That is, by diameter 5mm, the cylindric sample of long 20mm or it is shaped to the sample of tabular and makes the strip sample of wide 5mm, long 20mm
Product, thermal expansion is determined using dilatometer under 5 DEG C/minute of programming rate, the loading condiction of 10g, is obtained vitrification point, is bent
Take point, thermal coefficient of expansion (αmax、α50～350)。
The glass for constituting backplate 15 is represented with quality % of oxide benchmark, mainly constituted as glass, preferably comprised
.Hereinafter, simply represented with % with quality % of oxide benchmark.
If using such composition, can adopt in the same manner as the soda-lime glass being usually used in the manufacture of strengthens glass
With manufacturing process such as roll-in method, float glass process, fusion methods, productivity is good.If additionally, using such composition, glass is obtained
Glass temperature is more than 500 DEG C and high-temperature heat expansion factor alphamax400 × 10-7/ DEG C more than glass.Below to each composition
Compositing range is illustrated.
SiO2Content be 50～80%.If less than 50%, there is the density increase of glass, thermal coefficient of expansion and increase
Greatly, the unfavorable condition of marresistance variation etc..SiO2Content be preferably more than 55%, more preferably more than 60%.If additionally,
SiO2Content more than 80%, then viscosity is uprised, glass becomes to be difficult to melt.SiO2Content preferably less than 75%.
Al2O3Can contain as desired, its content is below 20%.If Al2O3Content more than 20%, then glass
The thermal coefficient of expansion changed more than temperature is not variable big, has residual stress to be difficult to the anxiety for increasing.Al2O3Content preferably less than 15%,
More preferably less than 10%.
B2O3Can contain as desired, its content is below 20%.If B2O3Content more than 20%, then vitrifying
Thermal coefficient of expansion more than temperature is not variable big, has residual stress to be difficult to the anxiety for increasing.B2O3Content preferably less than 15%, more
It is preferred that less than 10%.
Alkaline-earth metals oxide is that the total (MgO+CaO+SrO+BaO) of the content of MgO, CaO, SrO and BaO exists
More than 1%.If MgO+CaO+SrO+BaO be less than 1%, in order to maintain glass at a high temperature of dissolubility and appropriateness it is hot swollen
Swollen coefficient, needs a large amount of addition alkali metal oxides to be Li2O、Na2O、K2O, as a result, the temperature difference of DEFORMATION POINTS and yield point
Diminish, there is the anxiety that residual stress diminishes.MgO+CaO+SrO+BaO preferably more than 3%, more preferably more than 5%, further preferably
More than 10%.MgO+CaO+SrO+BaO preferably less than 40%.If it exceeds 40%, then the tendency towards devitrification increase of glass, productivity
It is deteriorated.MgO+CaO+SrO+BaO preferably less than 30%.
MgO can contain as desired, and its content is below 25%.By containing MgO, thermal coefficient of expansion can be made to increase,
And can improve marresistance.The content of MgO preferably more than 1%, more preferably more than 3%.If the content of MgO exceedes
25%, then the tendency towards devitrification increase of glass, productivity is deteriorated.The content of MgO preferably below 20%, more preferably 15% with
Under, further preferably below 10%.
CaO can contain as desired, and its content is below 25%.By rise can thermal coefficient of expansion containing CaO.
The content of CaO preferably more than 1%, more preferably more than 2%, further preferred more than 3%.If the content of CaO is more than 25%,
The tendency towards devitrification of glass increases, and productivity is deteriorated.The content of CaO preferably below 20%, more preferably below 15%, further
It is preferred that below 12%.
SrO can contain as desired, and its content is below 20%.By containing SrO, at a high temperature of can adjust glass
Meltability and thermal coefficient of expansion.If the content of SrO is more than 20%, the density increase of glass, the weight increase of glass.Contain
In the case of SrO, preferably more than 1%, more preferably more than 3%.The content of SrO is further excellent more preferably below 15%
It is selected in less than 10%.
BaO can contain as desired, and its content is below 20%.By containing BaO, at a high temperature of can adjust glass
Meltability and thermal coefficient of expansion.On the other hand, if containing BaO, the density of glass increases, therefore the weight of glass easily increases
Greatly.If additionally, containing BaO, glass becomes fragile, so crack initiation load step-down, easily damages.Therefore, the content of BaO is more
It is preferred that less than 15%, further preferred less than 10%.
Alkali metal oxide is Li2O、Na2O、K2O can contain as needed, the total (Li of its content2O+Na2O+K2O it is) excellent
Select more than 0.1%.If Li2O+Na2O+K2O be less than 0.1%, then in order to maintain glass at a high temperature of meltability and appropriateness
Thermal coefficient of expansion, needs a large amount of addition alkaline-earth metals oxides to be MgO, CaO, SrO and BaO, as a result, the mistake of glass
Thoroughly tendency increases, and productivity is deteriorated.Li2O+Na2O+K2O preferably more than 1%, more preferably more than 3%, further preferred 5% with
On, most preferably more than 10%.Li2O+Na2O+K2O preferably less than 30%.If it exceeds 30%, then the temperature of DEFORMATION POINTS and yield point
Degree difference diminishes, and has the anxiety that residual stress diminishes.Li2O+Na2O+K2O preferably less than 25%, more preferably less than 20%, it is further excellent
Select less than 15%.
Na2O can contain as desired, but its content is preferably more than 0.1%.In Na2The content of O is more than 0.1%
In the case of, meltability and thermal coefficient of expansion at a high temperature of glass can be made to increase.Na2The content of O more preferably more than 1%, enters one
Step preferably more than 3%, particularly preferred more than 5%, most preferably more than 10%.Na2The content of O is below 25%.If Na2O's contains
More than 25%, then the temperature difference of DEFORMATION POINTS and yield point diminishes amount, there is the anxiety that residual stress diminishes.Na2The content of O preferably 20%
Hereinafter, more preferably less than 17%, further preferred less than 15%.
K2O can contain as desired, but its content is preferably more than 0.1%.In K2Feelings of the content of O more than 0.1%
Under condition, meltability and thermal coefficient of expansion at a high temperature of glass can be made to increase.K2The content of O more preferably more than 1%, it is further excellent
Select more than 2%, particularly preferred more than 3%.K2The content of O is below 20%.If K2More than 20%, then glass is close for the content of O
Degree increase, the weight increase of glass.K2The content of O more preferably below 10%, further preferably exists preferably below 15%
Less than 5%.
The content of Fe is with Fe2O3Conversion meter, more than 0.3%.Fe has increase high-temperature heat expansion factor alphamaxEffect.And
Because Fe is the composition of absorption heat ray, promote the thermal convection current of melten glass, improving the homogenieity of glass, also by preventing melting
The high temperature of the bottom brick of kiln and have prolongation kiln life-span and other effects, preferably exist in the smelting process using the glass sheet of kiln large-scale
Contain Fe in composition.It is preferred that more than 0.45%, more preferably more than 0.7%, further preferred more than 1%, further preferred 1.5%
More than, further preferred more than 3%.On the other hand, the content of Fe is with Fe2O3Conversion meter, preferably below 10%.Exceeding
In the case of 10%, the temperature step-down of kiln is melted, the meltability of glass declines.More preferably less than 7%, most preferably less than 5%.
Constitute the particularly preferred Fe of glass of backplate 153+Content and Fe2+Content meets any one of following (1), (2)
Condition.
(1)Fe3+Content is with Fe2O3Conversion is calculated as more than 1.3 mass %, Fe2+Content is with Fe2O3Conversion is calculated as 0.8 mass %
Below.
(1) in, due to Fe3+Content is with Fe2O3Conversion is calculated as more than 1.3 mass %, even if therefore being thickness is made
In the case of the thin glass of below 2.5mm, it is possible to use common air-cooled intensifying device effectively gives residual stress.
(1) in, Fe3+Content is with Fe2O3More than conversion meter preferably 1.5 mass %, more than more preferably 2.2 mass %, enter one
It is more than step preferably 2.5 mass %.
(1) Fe of the air-cooled reinforcing glass of the present invention in2+Content is with Fe2O3Conversion is calculated as below 0.8 mass %.If
Fe2+Content is with Fe2O3Conversion meter is higher than 0.8 mass %, then be difficult to improve the temperature of melting kiln, and the meltability of glass declines.
(1) in, Fe2+Content is with Fe2O3Below conversion meter preferably 0.7 mass %, below more preferably 0.6 mass %.
(2)Fe3+Content is with Fe2O3Conversion is calculated as 0.8 mass % less than 2.2 mass %, Fe2+Content is with Fe2O3Change
Calculate for below 0.45 mass %, the value of Fe-Redox is less than 20%.
(2) in, due to Fe3+Content is with Fe2O3Conversion is calculated as 0.8 mass % less than 2.2 mass %, even if therefore
In the case where the thin glass that thickness is below 2.5mm is made, it is possible to use common air-cooled intensifying device effectively gives
Residual stress.If Fe3+Content is with Fe2O3Conversion meter is less than 0.8 mass %, then making thickness for the slim of below 2.5mm
In the case of glass, being had using common air-cooled intensifying device can not effectively give the anxiety of residual stress.If Fe3+Content with
Fe2O3Conversion is calculated as more than 2.2 mass %, then because yellow modulation is strong, degraded appearance and it is not preferred.
(2) in, Fe3+Content is with Fe2O3Conversion meter preferably 0.9～2.1 mass %, more preferably 1.0～2.0 mass %.
(2) in, Fe2+Content is with Fe2O3Conversion is calculated as below 0.45 mass %.If Fe2+Content is with Fe2O3Conversion meter ratio
0.45 mass % is high, then melt the temperature step-down of kiln, and the meltability of glass declines.
(2) in, Fe2+Content is with Fe2O3Below conversion meter preferably 0.43 mass %, below more preferably 0.41 mass %.
(2) in, the value of Fe-Redox is below 20%.Herein, Fe-Redox is referred to relative to Fe2O3Total iron of conversion
Content with Fe2O3The Fe of conversion2+The ratio of content.
If the value of Fe-Redox be more than 20%, due to being exposed to the sun under sunshine, tone variations and existing makes for a long time
The problem that used time color changes.
(2) in, the value preferably less than 16% of Fe-Redox, more preferably less than 13%, further preferred less than 10%.
Constitute backplate 15 glass can as needed, do not violating the present invention technological thought in the range of, contain
Amount to the other compositions less than 10%.As other compositions, such as, as ultra-violet absorber, Ti, Ce, V, Mo etc. can be enumerated
Oxide.Additionally, as glass melting when fining agent, oxide that also can be suitably containing Sb, Sn, S, As etc. or Cl, F
Deng.And, in order to adjust tone, also can be containing Ni, Cr, Co, Se, Ti, Mn, Cu, Er, Nd, S etc..
Constitute backplate 15 glass from from the viewpoint of the lightweight of solar module, the preferred 2.0mm of its thickness of slab
Hereinafter, more preferably below 1.8mm, further preferred below 1.5mm.But, from using common air-cooled intensifying device effectively
Give residual stress from the viewpoint of, preferred more than the 0.5mm of its thickness of slab, more preferably more than 0.7mm, further preferred 1.0mm with
On, particularly preferred more than 1.3mm.
The glass for constituting backplate 15 can be by the glass sheet forming methods such as float glass process, fusion method, glass tube down-drawing and roll-in method
Any one method manufacturing.If using float glass process, easily producing large-area glass plate, and easily reduce thickness deviation,
Thus it is preferred that.
Constituting the thickness of slab of backplate 15 can effectively be given in the glass of below 2.5mm using common air-cooled intensifying device
Residual stress.Constitute backplate 15 thickness of slab below 2.5mm glass preferred surface compression stress in more than 110MPa, it is more excellent
Select more than 130MPa, further preferred more than 150MPa.
Constitute backplate 15 thickness of slab below 2.0mm glass preferred surface compression stress CS in more than 70MPa, it is more excellent
Select more than 100MPa, further preferred more than 120MPa.
Constitute backplate 15 thickness of slab below 1.5mm glass preferred surface compression stress CS in more than 60MPa, it is more excellent
Select more than 80MPa, further preferred more than 100MPa.
Embodiment
The frit that embodiment 1～4 and comparative example 1, appropriate selective oxidation thing etc. are usually used is manufactured by float glass process
So that embodiment 5～14 is constituted for glass as shown in the table, mixture is put into platinum crucible, the resistance for being put into 1600 DEG C adds
Hot type electric furnace is melted 3 hours, after carrying out deaeration, homogenizing, in flowing into mould, at a temperature of than vitrification point high about 30 DEG C
After being kept for more than 1 hour, the glass sample that room temperature manufactures tabular is annealed to 1 DEG C per minute of cooling velocity.In order to evaluate this
The air-cooled reinforcing easness of a little glass, by each glass plate 550mm × 550mm sizes are cut to, and implement chamfer machining.Air-cooled reinforcing
Common roller transports the air-cooled strengthening device of formula used in process.Fig. 3 is the cooling nozzle for arranging the air-cooled strengthening device
The plan at position, left side represents the shape of the end face at the position for being provided with the cooling nozzle in figure.As shown in figure 3, multiple
Cooling nozzle 20,30,40 arrangements straggly.Nozzle 20 is set to the vertical processed surface towards processed glass plate.Nozzle 20 is straight
Footpath is 3.1mm, and the spacing between nozzle 20 is 24mm.Nozzle 30,40 is set to tiltedly against the processed surface of processed glass plate.Nozzle
30th, a diameter of 3.9mm of 40 difference, the spacing between spacing, nozzle 40 between nozzle 30 is respectively 24mm.It is adjacent relative to nozzle 30
The spacing of near nozzle 20, the spacing of neighbouring nozzle 40 are respectively 8mm.Nozzle 20 and the processed surface of processed glass plate
Distance is 10mm.The temperature of the air supplied as cooling medium from nozzle 20,30,40 is set into 60 DEG C, blast (mouthpiece
Blast) 18～19kPa is set to, by processed glass plate from the state for being heated to 630～635 DEG C with against processed glass plate
Processed surface, injection are cooled down as the mode of the air of cooling medium.With glass surface stressometer, (folding is former to make institute's strain formula
Commercial firm (Zhe Yuan System make institute) FSM-7000H processed) determine more than manufacture air-quench toughened glass surface compression stress value.By various kinds
The surface compression stress value of product divided by comparative example 1 surface compression stress value obtained by be worth as apparent surface's compression stress value.
Vitrification point (Tg), thermal coefficient of expansion (αmax、α50～350) by manufacture width 5mm, the strip sample of long 20mm
And using dilatometer (Brooker AXS companies (Block ル カ ー エ イ エ ッ Network ス エ ス societies) make, TMA4000SA) 5 DEG C/
Determine under programming rate, the loading condiction of 10g of minute and obtain.Additionally, using spectrophotometer (Perkinelmer Inc.
(Perkin Elmer societies) makes, Lambda950) determine transmission of visible light (Tv_D65), ultraviolet transmittance (Tuv), the sun
Radiant transmittance (Te), chromaticity coordinate (L*, a*, b*).Embodiment 5～9 does not determine Tv_D65, Tuv, Te, chromaticity coordinate
(L*、a*、b*)。
Additionally, according to the graphs of the glass sample by spectrophotometric determination, using following formula (1) Fe- is calculated
Redox。
Fe-Redox (%)=- loge(T1000nm/91.4)/(Fe2O3Amount × t × 20.79) × 100 ... (1).
In formula (1), T1000nmFor the transmissivity (%) of wavelength 1000nm, t for glass sample thickness (cm), Fe2O3Measure and be
By fluorescent X-ray determine obtain with Fe2O3The total iron content (%=quality percentages) of conversion.
Above-mentioned Fe-Redox is the method according to being obtained by the graphs of the glass sample of spectrophotometric determination, but
The value also may be regarded as with same glass with Fe2O3The Fe of conversion2+Content and with Fe2O3Ratio of the total iron content of conversion etc.
Together.Described in table 1～3 with Fe2O3The Fe of conversion2+Content is according to Fe2O3The total iron content of conversion and above-mentioned Fe-Redox are asked
Go out, with Fe2O3The Fe of conversion3+Content is according to Fe2O3The total iron content of conversion and with Fe2O3The Fe of conversion2+Content is obtained.
These results are shown in table 1～3.Additionally, total iron content (Fe2O3Conversion) and apparent surface's compression stress value relation
It is shown in Fig. 4.Additionally, embodiment and the total iron content (Fe in comparative example2O3Conversion) and αmaxRelation be shown in Fig. 5.
[table 1]
| Wt% | Comparative example 1 | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| SiO2 | 72.23 | 70.35 | 71.11 | 69.91 | 71.11 |
| Al2O3 | 1.53 | 1.51 | 1.94 | 1.80 | 0.77 |
| CaO | 8.00 | 8.58 | 8.93 | 8.73 | 8.49 |
| MgO | 3.74 | 4.80 | 3.22 | 4.26 | 3.73 |
| Na2O | 13.19 | 13.10 | 12.90 | 13.22 | 13.75 |
| K2O | 0.80 | 0.91 | 0.94 | 0.86 | 0.08 |
| SO3 | 0.40 | 0.17 | 0.13 | 0.18 | 0.26 |
| TiO2 | 0.02 | 0.07 | 0.04 | 0.04 | 0.07 |
| CeO2 | 0.01 | 0.03 | 0.02 | 0.01 | 0.00 |
| CoO | 0.025 | 0.0075 | |||
| Se | 0.0031 | ||||
| MnO2 | 0.0249 | ||||
| Cr2O3 | 0.0073 | ||||
| Fe2O3 | 0.09 | 0.48 | 0.78 | 0.99 | 1.75 |
| Fe3+(Fe2O3Conversion) | 0.07 | 0.34 | 0.56 | 0.76 | 1.25 |
| Fe2+(Fe2O3Conversion) | 0.02 | 0.14 | 0.22 | 0.23 | 0.50 |
| α50-350(10-7/℃) | 83.4 | 87.0 | 85.9 | 87.1 | 84.1 |
| αmax(10-7/℃) | 390 | 425 | 405 | 429 | 443 |
| Tg(℃) | 560 | 553 | 555 | 550 | 545 |
| Apparent surface's compression stress value | 1.00 | 1.09 | 1.12 | 1.16 | 1.23 |
| Thickness of slab (mm) | 1.96 | 1.97 | 1.95 | 1.99 | 2.09 |
| Tv_D65 (%) | 91.0 | 86.0 | 82.8 | 40.1 | 54.4 |
| Tuv (%) | 78.2 | 49.8 | 37.4 | 15.8 | 11.9 |
| Te (%) | 88.1 | 73.3 | 64.2 | 43.6 | 36.6 |
| L* | 96.4 | 94.3 | 92.9 | 69.6 | 78.7 |
| a* | -0.5 | -2.4 | -4.0 | -0.2 | -10.1 |
| b* | 0.2 | 0.0 | 0.8 | -0.6 | -0.9 |
[table 2]
| Wt% | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 |
| SiO2 | 70.60 | 70.40 | 70.40 | 70.40 | 70.94 |
| Al2O3 | 0.85 | 1.78 | 1.78 | 1.78 | 1.55 |
| CaO | 8.76 | 8.32 | 8.32 | 8.32 | 8.42 |
| MgO | 4.13 | 4.25 | 4.25 | 4.25 | 4.62 |
| Na2O | 13.56 | 13.31 | 13.31 | 13.31 | 13.29 |
| K2O | 0.16 | 0.58 | 0.58 | 0.58 | 0.64 |
| SO3 | |||||
| TiO2 | |||||
| CeO2 | |||||
| CoO | |||||
| Se | |||||
| MnO2 | |||||
| Cr2O3 | |||||
| Fe2O3 | 1.70 | 1.20 | 1.50 | 2.00 | 0.55 |
| Fe3+(Fe2O3Conversion) | 1.36 | 1.10 | 1.35 | 1.70 | 0.42 |
| Fe2+(Fe2O3Conversion) | 0.34 | 0.10 | 0.15 | 0.30 | 0.13 |
| α50-350(10-7/℃) | 86.2 | 85.1 | 85.1 | 85.1 | 85.2 |
| αmax(10-7/℃) | 417 | 412 | 417 | 424 | 409 |
| Tg(℃) | 552 | 558 | 558 | 558 | 560 |
| Apparent surface's compression stress value | 1.13 | 1.10 | 1.10 | 1.11 | 1.08 |
| Thickness of slab (mm) | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 |
| Tv_D65 (%) | |||||
| Tuv (%) | |||||
| Te (%) | |||||
| L* | |||||
| a* | |||||
| b* |
[table 3]
| Wt.% | Embodiment 10 | Embodiment 11 | Embodiment 12 | Embodiment 13 | Embodiment 14 |
| SiO2 | 70.40 | 70.40 | 70.40 | 70.40 | 70.40 |
| Al2O3 | 1.78 | 1.78 | 1.78 | 1.78 | 1.78 |
| CaO | 8.32 | 8.32 | 8.32 | 8.32 | 8.32 |
| MgO | 4.25 | 4.25 | 4.25 | 4.25 | 4.25 |
| Na2O | 13.31 | 13.31 | 13.31 | 13.31 | 13.31 |
| K2O | 0.58 | 0.58 | 0.58 | 0.58 | 0.58 |
| SO3 | |||||
| TiO2 | |||||
| CeO2 | |||||
| CoO | |||||
| Se | |||||
| MnO2 | |||||
| Cr2O3 | |||||
| Fe2O3 | 5.00 | 5.00 | 5.00 | 3.00 | 6.50 |
| Fe3+(Fe2O3Conversion) | 4.25 | 3.25 | 2.75 | 2.55 | 4.55 |
| Fe2+(Fe2O3Conversion) | 0.75 | 1.75 | 2.25 | 0.45 | 1.95 |
| α50-350(10-7/℃) | 85.8 | 86.3 | 85.7 | 85.1 | 86.0 |
| αmax(10-7/℃) | 488 | 456 | 437 | 432 | 483 |
| Tg(℃) | 552 | 544 | 544 | 550 | 550 |
| Apparent surface's compression stress value | 1.21 | 1.23 | 1.20 | 1.16 | 1.22 |
| Thickness of slab (mm) | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 |
| Tv_D65 (%) | 23.7 | 10.3 | 2.8 | 42.3 | 2.7 |
| Tuv (%) | 0.0 | 0.2 | 0.0 | 1.7 | 0.0 |
| Te (%) | 13.6 | 3.7 | 0.7 | 22.4 | 0.9 |
| L* | 55.8 | 38.3 | 19.4 | 71.0 | 18.9 |
| a* | -9.8 | -15.9 | -10.9 | -11.6 | -13.5 |
| b* | 28.4 | 7.0 | 29.4 | 12.0 | 9.3 |
With Fe2O3High-temperature heat expansion coefficient of the total iron content of expression in the glass of the embodiment 1～14 of more than 3000ppm
αmax400 × 10-7/ DEG C more than, apparent surface's compression stress value of the glass after air-cooled reinforcing is more than 1.05.With Fe2O3Table
The high-temperature heat expansion factor alpha of the glass of comparative example 1 of the total iron content for showing less than 3000ppmmaxLess than 400 × 10-7/ DEG C, it is air-cooled
Apparent surface's compression stress value of the glass after reinforcing is less than 1.05.
As shown in figure 4, with total iron content (Fe2O3Conversion) increase, apparent surface's compression stress value is uprised.Such as Fig. 5 institutes
Show, if total iron content is with Fe2O3Conversion is counted more than 0.3 mass %, then αmax400 × 10-7/ DEG C more than.
Symbol description
10 solar modules
10a sensitive surfaces
The 10b back sides
11 light panels
12 solar battery cells
15 backplates
16 sealants
17 sensitive surface side bonds layers
18 rear side adhesive linkages
20th, 30,40 nozzle
Claims (36)
1. a kind of solar module, it is characterised in that
With from sensitive surface it is lateral rear side possess the solar-electricity of light panel, solar battery cell, backplate successively
Pond module body,
The solar module main body has the sealing solar-electricity between the light panel and the backplate
The sealant of pool unit,
The light panel is chemically reinforced glass, physical strengthening glass or nonreinforcement glass,
The backplate is physical strengthening glass,
The glass for constituting light panel is with Fe2O3The total iron content of expression is less than 3000 mass ppm,
The glass for constituting backplate is with Fe2O3The total iron content of expression more than 3000 mass ppm,
The thickness of slab of the backplate is in below 2.5mm.
2. solar module as claimed in claim 1, it is characterised in that the glass of the composition backplate is with Fe2O3Table
The total iron content for showing is more than 10000 mass ppm.
3. solar module as claimed in claim 1, it is characterised in that the glass of the composition backplate is with Fe2O3Table
The total iron content for showing is more than 15000 mass ppm.
4. solar module as claimed in claim 1, it is characterised in that the glass of the composition backplate is with Fe2O3Table
The total iron content for showing is more than 20000 mass ppm.
5. the solar module as described in Claims 1 to 4, it is characterised in that the Fe of the glass of the composition backplate3+
Content is with Fe2O3Conversion is calculated as more than 3000 mass ppm.
6. the solar module as described in Claims 1 to 4, it is characterised in that the Fe of the glass of the composition backplate3+
Content is with Fe2O3Conversion is calculated as more than 10000 mass ppm.
7. the solar module as described in claim 1～6, it is characterised in that the Fe of the glass of the composition backplate3+
Content is with Fe2O3Conversion is calculated as more than 1.3 mass %, Fe2+Content is with Fe2O3Conversion is calculated as below 0.8 mass %.
8. the solar module as described in claim 1～6, it is characterised in that the Fe of the glass of the composition backplate3+
Content is with Fe2O3Conversion is calculated as more than 2.2 mass %, Fe2+Content is with Fe2O3Conversion is calculated as below 0.8 mass %.
9. the solar module as described in claim 1～6, it is characterised in that the Fe of the glass of the composition backplate3+
Content is with Fe2O3Conversion is calculated as 0.8 mass % less than 2.2 mass %, Fe2+Content is with Fe2O3Conversion is calculated as 0.45 matter
The value of amount below %, Fe-Redox is less than 20%.
10. the solar module as any one of claim 1～9, it is characterised in that the light panel
Transmission of visible light (D65 light sources) Tv_65 of ISO-9050 (2003) regulations is more than 90%.
11. solar modules as any one of claim 1～9, it is characterised in that the ISO- of the backplate
Transmission of visible light (D65 light sources) Tv_65 of 9050 (2003) regulations is less than 90%.
12. solar modules as any one of claim 1～9, it is characterised in that the ISO- of the backplate
Transmission of visible light (D65 light sources) Tv_65 of 9050 (2003) regulations is below 89%.
13. solar modules as any one of claim 1～9, it is characterised in that the ISO- of the backplate
Transmission of visible light (D65 light sources) Tv_65 of 9050 (2003) regulations is less than 80%.
14. solar modules as any one of claim 1～13, it is characterised in that the backplate
Transmission of visible light (D65 light sources) Tv_65 of ISO-9050 (2003) regulations is empty more than the L*a*b colors of 50%, CIE1976 standards
Between middle a*≤10 and b*≤20.
15. solar modules as any one of claim 1～13, it is characterised in that the backplate
Transmission of visible light (D65 light sources) Tv_65 of ISO-9050 (2003) regulations is empty more than the L*a*b colors of 50%, CIE1976 standards
Between middle a*≤5 and b*≤15.
16. solar modules as any one of claim 1～13, it is characterised in that the backplate
Transmission of visible light (D65 light sources) Tv_65 of ISO-9050 (2003) regulations is empty more than the L*a*b colors of 50%, CIE1976 standards
Between middle a*≤0 and b*≤10.
17. solar modules as any one of claim 1～16, it is characterised in that the composition backplate
Glass represented with quality % of oxide benchmark, contain
18. solar modules as any one of claim 1～16, it is characterised in that the composition backplate
Glass represented with quality % of oxide benchmark, contain
19. solar modules as any one of claim 1～18, it is characterised in that the composition backplate
Mean thermal expansion coefficients α of the glass at 50～350 DEG C50～350For 70 × 10-7/ DEG C more than 110 × 10-7/ DEG C below, glass
It is more than 500 DEG C to change temperature, maximum α of the thermal coefficient of expansion between vitrification point and yield pointmaxFor 400 × 10-7/℃
More than.
20. solar modules as any one of claim 1～18, it is characterised in that the composition backplate
Mean thermal expansion coefficients α of the glass at 50～350 DEG C50～350For 80 × 10-7/ DEG C more than 100 × 10-7/ DEG C below, glass
It is more than 500 DEG C to change temperature, maximum α of the thermal coefficient of expansion between vitrification point and yield pointmaxFor 400 × 10-7/℃
More than.
21. solar modules as any one of claim 1～20, it is characterised in that the composition backplate
Glass high-temperature heat expansion factor alphamaxWith the mean thermal expansion coefficients α at 50～350 DEG C50～350Coefficient of thermal expansion differences Δ α
(=αmax-α50～350) it is 315 × 10-7/ DEG C more than.
22. solar modules as any one of claim 1～20, it is characterised in that the composition backplate
Glass high-temperature heat expansion factor alphamaxWith the mean thermal expansion coefficients α at 50～350 DEG C50～350Coefficient of thermal expansion differences Δ α
(=αmax-α50～350) it is 330 × 10-7/ DEG C more than.
23. solar modules as any one of claim 1～20, it is characterised in that the composition backplate
Glass high-temperature heat expansion factor alphamaxWith the mean thermal expansion coefficients α at 50～350 DEG C50～350Coefficient of thermal expansion differences Δ α
(=αmax-α50～350) it is 350 × 10-7/ DEG C more than.
24. solar modules as any one of claim 1～23, it is characterised in that the backplate
The ultraviolet transmittance Tuv of ISO-9050 (2003) regulations is less than 70%.
25. solar modules as any one of claim 1～23, it is characterised in that the backplate
The ultraviolet transmittance Tuv of ISO-9050 (2003) regulations is less than 50%.
26. solar modules as any one of claim 1～25, it is characterised in that the backplate
Solar radiation transmissivity Te of ISO-13837A (2008) regulations is less than 85%.
27. solar modules as any one of claim 1～25, it is characterised in that the backplate
Solar radiation transmissivity Te of ISO-13837A (2008) regulations is less than 70%.
28. solar modules as any one of claim 1～27, it is characterised in that the composition backplate
Glass surface compression stress value be more than 110MPa.
29. solar modules as any one of claim 1～27, it is characterised in that the composition backplate
Glass surface compression stress value be more than 130MPa.
30. solar modules as any one of claim 1～27, it is characterised in that the composition backplate
Glass surface compression stress value be more than 150MPa.
31. solar modules as any one of claim 1～27, it is characterised in that the composition backplate
Glass thickness of slab be below 2.0mm, surface compression stress value be more than 70MPa.
32. solar modules as any one of claim 1～27, it is characterised in that the composition backplate
Glass thickness of slab be below 2.0mm, surface compression stress value be more than 100MPa.
33. solar modules as any one of claim 1～27, it is characterised in that the composition backplate
Glass thickness of slab be below 2.0mm, surface compression stress value be more than 120MPa.
34. solar modules as any one of claim 1～27, it is characterised in that the composition backplate
Glass thickness of slab be below 1.5mm, surface compression stress value be more than 60MPa.
35. solar modules as any one of claim 1～27, it is characterised in that the composition backplate
Glass thickness of slab be below 1.5mm, surface compression stress value be more than 80MPa.
36. solar modules as any one of claim 1～27, it is characterised in that the composition backplate
Glass thickness of slab be below 1.5mm, surface compression stress value be more than 100MPa.
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