CN103794670A - Flexible backplane and photovoltaic module - Google Patents
Flexible backplane and photovoltaic module Download PDFInfo
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- CN103794670A CN103794670A CN201410071736.8A CN201410071736A CN103794670A CN 103794670 A CN103794670 A CN 103794670A CN 201410071736 A CN201410071736 A CN 201410071736A CN 103794670 A CN103794670 A CN 103794670A
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Abstract
The invention discloses a flexible backplane and a photovoltaic module. The flexible backplane comprises an insulating layer, an inorganic membrane gas-resisting layer and a fluorine membrane weatherproof layer, wherein the insulating layer is used for being attached to a solar cell string of the photovoltaic module, and the inorganic membrane gas-resisting layer and the fluorine membrane weatherproof layer are arranged at the same side of the insulating layer. The flexible backplane is provided with the inorganic membrane gas-resisting layer used for preventing water vapor from penetrating, and therefore a thin fluorine membrane can be used, the thickness of the fluorine membrane is reduced, production cost is lowered, and meanwhile the low water vapor penetration rate is guaranteed.
Description
Technical field
The present invention relates to photovoltaic power generation technology field, more particularly, relate to a kind of flexible back plate and photovoltaic module.
Background technology
Along with the exhaustion day by day of the conventional energy resources such as earth oil, coal, natural gas, photovoltaic solar cell constantly promotes as a kind of green, the status of regenerative resource in mankind's energy resource consumption accounting.For avoiding destruction and the erosion to solar cell such as steam, ultraviolet ray in actual application environment, must carry out packaging protection to it, form photovoltaic module.Photovoltaic module is made up of cover plate, solar cell string, encapsulating material and backboard conventionally.Wherein, described solar cell was ganged up encapsulating material and was encapsulated between described cover plate and described backboard.
For guaranteeing useful life of solar cell, need backboard to have high pressure resistantly to puncture, anti-ultraviolet ageing, water-fast vapour such as sees through at the characteristic, needs to have certain mechanical strength simultaneously.Prior art is in order to reduce the degradation with aging of atmosphere middle-ultraviolet lamp for encapsulating material and backboard base material, and corrode inner encapsulating material or even solar cell string from the photovoltaic module back side in order to reduce steam in environment, generally need to there is in the setting of photovoltaic back air surface the fluorine membrane material (fluoro-containing copolymer film) of uvioresistant and anti-steam ability, such as polyvinyl fluoride thin film etc.
Fluorine membrane material price is comparatively expensive, cause the cost of manufacture of photovoltaic module and backboard thereof higher, in order to reduce the cost of manufacture of backboard and photovoltaic module, reduce the thickness of fluorine film, adopt and there is the common choice that becomes current photovoltaic industry reduction backboard cost compared with the backboard of minimal thickness fluorine film.But the water vapor transmittance of fluorine membrane material rises gradually along with the reduction of thickness, and higher water vapor transmittance can have a strong impact on the useful life of photovoltaic module.Therefore, how in reducing fluorine membrane material thickness, to guarantee that it is a photovoltaic component back plate field problem urgently to be resolved hurrily that backboard has lower water vapor transmittance.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of flexible back plate and photovoltaic module, described photovoltaic module has reduced the thickness of fluorine film, and has lower water vapor transmittance.
For achieving the above object, the invention provides following technical scheme:
A kind of flexible back plate, this flexible back plate comprises:
Insulating barrier, described insulating barrier is for fitting with the solar cell string of photovoltaic module;
Be arranged on inoranic membrane gas barrier layer and the fluorine film weathering layer of described insulating barrier the same side.
Preferably, in described flexible back plate, described fluorine film weathering layer is arranged between described insulating barrier and described inoranic membrane gas barrier layer;
Or described inoranic membrane gas barrier layer is arranged between described insulating barrier and described fluorine film weathering layer.
Preferably, in described flexible back plate, described insulating barrier is any one single layer structure in poly terephthalic acid class plastic film, density polyethylene film with high, fibrous paper film, mica film or the laminated construction of multiple formation.
Preferably, in described flexible back plate, the thickness of described insulating barrier is 100 μ m-300 μ m, comprises endpoint value.
Preferably, in described flexible back plate, the water vapor transmittance of described inoranic membrane gas barrier layer is not more than 2g/m
224h.
Preferably, in described flexible back plate, described inoranic membrane gas barrier layer is any one single layer structure in silicon oxide film, silicon nitride film, boron nitride film, diamond-like carbon film, aluminum oxide film, aln precipitation film, Titanium oxide film, titanium nitride film or the laminated construction of multiple formation.
Preferably, in described flexible back plate, the thickness of described inoranic membrane gas barrier layer is 5 μ m-50 μ m, comprises endpoint value.
Preferably, in described flexible back plate, described fluorine film weathering layer is any one single layer structure in polyvinyl fluoride thin film, polyvinylidene difluoride film, chlorotrifluoroethylene-ethylene copolymer film, hexafluoropropylene (HFP)/tetrafluoroethylene (TFE)-vinylidene fluoride copolymers plastic film or the laminated construction of multiple formation.
Preferably, in described flexible back plate, the thickness of described fluorine film weathering layer is 10 μ m-50 μ m, comprises endpoint value.
The present invention also provides a kind of photovoltaic module, and this photovoltaic module comprises:
The flexible back plate being oppositely arranged and cover plate;
Solar cell string, described solar cell was ganged up encapsulating material and was fixed between described flexible back plate and described cover plate;
Wherein, described flexible back plate is the flexible back plate described in above-mentioned any execution mode.
Can find out from technique scheme, flexible back plate provided by the present invention comprises: insulating barrier, and described insulating barrier is for fitting with the solar cell string of photovoltaic module; Be arranged on inoranic membrane gas barrier layer and the fluorine film weathering layer of described insulating barrier the same side.Described flexible back plate is provided for the inoranic membrane gas barrier layer that prevents that steam from seeing through, and so can adopt the fluorine film compared with minimal thickness, has reduced the thickness of fluorine film, has reduced production cost, has guaranteed lower water vapor transmittance simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of photovoltaic component back plate common in prior art;
The structural representation of a kind of flexible back plate that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the another kind of flexible back plate that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
With reference to figure 1, conventional photovoltaic component back plate comprises: insulating barrier 2 and fluorine film 1.Described fluorine film 2 is for uv reflectance and waterproof.In the time carrying out component package, described insulating barrier 2 is for the solar cell string of the photovoltaic module of fitting, and described fluorine film 1 deviates from the solar cell string setting of photovoltaic module.
As described in background, fluorine membrane material price is comparatively expensive, cause the cost of manufacture of photovoltaic module and backboard thereof higher, in order to reduce the cost of manufacture of backboard and photovoltaic module, reduce the thickness of fluorine film, adopt and there is the common choice that becomes current photovoltaic industry reduction backboard cost compared with the backboard of minimal thickness fluorine film.But the water vapor transmittance of fluorine membrane material rises gradually along with the reduction of thickness, and higher water vapor transmittance can have a strong impact on the useful life of photovoltaic module.Therefore, how in reducing fluorine membrane material thickness, to guarantee that it is a photovoltaic component back plate field problem urgently to be resolved hurrily that backboard has lower water vapor transmittance.
Inventor finds, does not use fluorine membrane material, adopts the backboard that film of fluoropolymer membrane material is not made also can realize certain waterproof and anti-uv-ray, thereby realizes the object reducing costs.As adopt the backboard of inorganic thin film material layer complexed metal film, and in described inorganic material layer, add uvioresistant additive and realize anti-ultraviolet function, realize water-proof function by metallic film.But additive be distribution of particles in rete, cannot spread all over whole surface, anti-uv-ray a little less than, and metal level is subject to acid and alkali corrosion, useful life is shorter.
For addressing the above problem, the embodiment of the present application provides a kind of flexible back plate, and for the encapsulation of photovoltaic module, described flexible back plate comprises:
Insulating barrier, described insulating barrier is for fitting with the solar cell string of photovoltaic module;
Be arranged on inoranic membrane gas barrier layer and the fluorine film weathering layer of described insulating barrier the same side.
Described flexible back plate is provided for the inoranic membrane gas barrier layer that prevents that steam from seeing through, and so can adopt the fluorine film compared with minimal thickness, has reduced the thickness of fluorine film, has reduced production cost, has guaranteed lower water vapor transmittance simultaneously.Meanwhile, fluorine membrane material, its flexibility is poor, causes the flexibility of backboard poor, bending easy fracture, the application has reduced the thickness of fluorine film, can adopt flexible inorganic material preferably to make described inoranic membrane gas barrier layer, can improve the flexibility of backboard.
With reference to figure 2, a kind of implementation that Fig. 2 is above-mentioned flexible back plate, flexible back plate comprises described in Fig. 2: insulating barrier 3, fluorine film weathering layer 4 and inoranic membrane gas barrier layer 5.Wherein, described fluorine film weathering layer 4 is arranged between described insulating barrier 3 and described inoranic membrane gas barrier layer 5.
Flexible back plate shown in Fig. 2 arranges inoranic membrane gas barrier layer 5 and realizes low water vapor transmittance, therefore can adopt thinner fluorine film weathering layer 4, has reduced the use of fluorine membrane material; While carrying out photovoltaic component encapsulating, inoranic membrane gas barrier layer 5 is positioned at outermost layer, and general inorganic material film has good resistance to wear, can prevent the wearing and tearing of fluorine film weathering layer 4.
In structure shown in Fig. 2, described fluorine film weathering layer 4 can be fixed together by binding agent with described insulating barrier 3, can be at the another side of fluorine film weathering layer 4 by ion plating or PVD(physics vapor phase deposition) or CVD(chemical meteorology deposition) or rubbing method form described inoranic membrane gas barrier layer 5.
With reference to figure 3, in other embodiments, described inoranic membrane gas barrier layer 5 can also be arranged between described insulating barrier 3 and described fluorine film weathering layer 4, can adopt equally thinner fluorine film weathering layer 4, reduce the use of fluorine membrane material, when reducing costs, guaranteed to have lower water vapor transmittance.
In structure shown in Fig. 3, inoranic membrane gas barrier layer 5 is fixed together by binding agent with insulating barrier 3, can be at the another side of inoranic membrane gas barrier layer 5 by ion plating or PVD(physics vapor phase deposition) or CVD(chemical meteorology deposition) or rubbing method form described fluorine film weathering layer 4.
Above-mentioned bonding agent is selected from polyurethane adhesive, acrylate adhesive, epoxy resin adhesive, polyvinyl acetate bonding agent or Lauxite bonding agent, be specially dual-component polyurethane bonding agent, single component polyurethane adhesive agent, UV solidifies, hot curing or dual cure acrylate adhesive, High Temperature Curing Epoxy Resin System bonding agent etc.Wherein dual-component polyurethane bonding agent can comprise PEPA host and curing agent, this PEPA host can be polyethylene glycol adipate glycol (PEA), poly-adipate glycol-propylene glycol ester glycol, poly-adipic acid diglycol esterdiol (PDA), poly-adipate glycol-diglycol ethylene esterdiol, poly-adipic acid-1,4-butanediol ester glycol (PBA), poly-adipate glycol-1,4-butanediol ester glycol and/or poly-adipic acid neopentyl glycol-1,6-hexylene glycol esterdiol; Curing agent can be 1, hexamethylene-diisocyanate ((HDI), IPDI (IPDI), XDI (XDI), Methylcyclohexyl diisocyanate (HTDI) and/or dicyclohexyl methyl hydride diisocyanate (HMDI).
In the above-described embodiment:
Described insulating barrier 3 is any one single layer structure in poly terephthalic acid class plastic film, density polyethylene film with high, fibrous paper film, mica film or the laminated construction of multiple formation.The thickness of described insulating barrier 3 is 100 μ m-300 μ m, comprises endpoint value.Adopt described insulating barrier 3 to guarantee that backboard has good insulating properties, can improve the arc resistant breakdown capability of backboard.
Described inoranic membrane gas barrier layer 5 is any one single layer structure in silicon oxide film, silicon nitride film, boron nitride film, diamond-like carbon film, aluminum oxide film, aln precipitation film, Titanium oxide film, titanium nitride film or the laminated construction of multiple formation.The thickness of described inoranic membrane gas barrier layer 5 is 5 μ m-50 μ m, comprises endpoint value.Adopt described inoranic membrane gas barrier layer 5 can make the water vapor transmittance of backboard be not more than 2g/m
224h, makes backboard have good waterproof ability, has improved the useful life of backboard and assembly.
Described fluorine film weathering layer 4 is any one single layer structure in polyvinyl fluoride thin film, polyvinylidene difluoride film, chlorotrifluoroethylene-ethylene copolymer film, hexafluoropropylene (HFP)/tetrafluoroethylene (TFE)-vinylidene fluoride copolymers plastic film or the laminated construction of multiple formation.
Owing to adopting described inoranic membrane gas barrier layer 5 to see through for preventing steam, can make the water vapor transmittance of backboard be not more than 2g/m
224h, therefore, in the present embodiment backboard, can adopt thickness is the fluorine film weathering layer 5 of 10 μ m-50 μ m, comprises endpoint value.With respect to only adopting fluorine membrane material to realize the uvioresistant implementation of waterproof, greatly reduce the thickness of fluorine membrane material, reduce production cost, guaranteed that backboard has lower water vapor transmittance, has guaranteed the water resistance of backboard simultaneously.
Below by concrete backboard sample, the beneficial effect of backboard described in the application is specifically described:
Be the PET(poly terephthalic acid diethyl alcohol ester of 125 μ m using thickness) unreel through unreeling machine as insulating barrier, then dual-component polyurethane bonding agent (by isocyanates and PEPA according to the mixture of mol ratio 1:1) automatic charging, after described bonding agent is coated with on insulating barrier through three sections of bellows air drafts, length is 10m-30m, linear velocity is 5m/min-40m/min, be the PVF(polyvinyl fluoride of 15 μ m at the production line other end and thickness) fluorine film weathering layer (unreeling machine by the other end unreels) together pass through composite roll, through composite roll pressing, again by winder rolling, obtain the semi-finished product of flexible back plate.
According to same way by the semi-finished product of flexible back plate after unreeling machine unreels tiling, then by positive silicoacetic acid ester: absolute ethyl alcohol: distilled water is that 2.8 mixed liquor is sprayed on semi-finished product for 1:15:9.5 is mixed into pH value in molar ratio, spraying 75S, then be dried 2 hours at 120 ℃, acquisition has the flexible back plate of membranous layer of silicon oxide (inoranic membrane gas barrier layer), and silicon oxide film layer thickness is 15 μ m.Detecting its water vapor transmittance is 2g/m
224h.
Be the PET(poly terephthalic acid diethyl alcohol ester of 125 μ m using thickness) unreel through unreeling machine as insulating barrier, then dual-component polyurethane bonding agent automatic charging, after described bonding agent is coated with on insulating barrier through three sections of bellows air drafts, length is 10m-30m, linear velocity is 5m/min-40m/min, the fluorine film weathering layer (unreeling machine by the other end unreels) that is the PVF of 10 μ m at the production line other end and thickness together passes through composite roll, through composite roll pressing, by winder rolling, obtain the semi-finished product of flexible back plate again.
According to same way by semi-finished product after unreeling machine unreels tiling, 2 × 10
-3under Pa, 25 ℃ of conditions, controlling high purity oxygen gas (99.99%) is 1:3 with high-purity argon gas gas mass flow ratio, magnetron sputtering on semi-finished product (CVD) monocrystalline silicon 300min, acquisition has the flexible back plate of membranous layer of silicon oxide (inoranic membrane gas barrier layer), and silicon oxide film layer thickness is 5 μ m.Detecting its water vapor transmittance is 0.4g/m
224h.
The PET that is 125 μ m using thickness unreels through unreeling machine as insulating barrier, then dual-component polyurethane bonding agent automatic charging, after described bonding agent is coated with on insulating barrier through three sections of bellows air drafts, length is 10m-30m, linear velocity is 5m/min-40m/min, and the fluorine film weathering layer (unreeling machine by the other end unreels) that is the PVF of 15 μ m at the production line other end and thickness together passes through composite roll, through composite roll pressing, by winder rolling, obtain the semi-finished product of flexible back plate again.
According to same way by semi-finished product after unreeling machine unreels tiling, 2 × 10
-3under Pa, 200 ℃ of conditions, control silane (purity 99.99%)/oxygen (purity 99.99%)/ammonia (purity 99.99%)/hydrogen (purity 99.99%) gas mass flow than being 3:1:1:20, on semi-finished product, adopt the voltage of 1000V, the power of 2000W carries out plasma chemical vapor deposition (PECVD) 300min, acquisition has the flexible back plate of 8 μ m silicon oxynitride retes (inoranic membrane gas barrier layer), and silicon oxynitride thicknesses of layers is 8 μ m.Detecting its water vapor transmittance is 0.7g/m
224h.
Be the poly-naphthalenedicarboxylic acid diethyl alcohol ester of PEN(of 100 μ m using thickness) unreel through unreeling machine as insulating barrier, then dual-component polyurethane bonding agent automatic charging, after bonding agent is coated with on insulating barrier through three sections of bellows air drafts, length is 10m-30m, linear velocity is 5m/min-40m/min, fluorine film weathering layer (unreeling machine by the other end unreels) at the PVF of the production line other end and 10 μ m together passes through composite roll, through composite roll pressing, by winder rolling, obtain the semi-finished product of flexible back plate again.
According to same way by semi-finished product after unreeling machine unreels tiling, 2 × 10
-3under Pa, 25 ℃ of conditions, controlling high purity oxygen gas (99.99%) is 1:3 with high-purity argon gas gas mass flow ratio, magnetron sputtering monocrystalline silicon 300min on semi-finished product, obtains the flexible back plate with membranous layer of silicon oxide (inoranic membrane gas barrier layer), and silicon oxide film layer thickness is 5 μ m.Detecting its water vapor transmittance is 0.5g/m
224h.
Be the HDPE(high density polyethylene (HDPE) of 300 μ m using thickness) unreel through unreeling machine as insulating barrier, then dual-component polyurethane bonding agent automatic charging, after described bonding agent is coated with on insulating barrier through three sections of bellows air drafts, length is 10m-30m, linear velocity is 5m/min-40m/min, fluorine film weathering layer (unreeling machine by the other end unreels) at the PVF of the production line other end and 30 μ m together passes through composite roll, through composite roll pressing, by winder rolling, obtain the semi-finished product of flexible back plate again.
According to same way by semi-finished product after unreeling machine unreels tiling, then by positive silicoacetic acid ester: absolute ethyl alcohol: distilled water is 1:15:9.5 in molar ratio, being mixed into pH value and being 7.6 mixed liquor is sprayed on semi-finished product, spraying 200S, then be dried 2 hours at 120 ℃, acquisition has the flexible back plate of membranous layer of silicon oxide (inoranic membrane gas barrier layer), silicon oxide film layer thickness 50 μ m.Detect its water vapor transmittance 1.4g/m
224h.
Backboard sample 6
The PET that is 150 μ m using thickness unreels through unreeling machine as insulating barrier, then dual-component polyurethane bonding agent automatic charging, after described bonding agent is coated with on insulating barrier through three sections of bellows air drafts, length is 10m-30m, linear velocity is 5m/min-40m/min, be the PVDF(Kynoar of 30 μ m at the production line other end and thickness) fluorine film weathering layer (unreeling machine by the other end unreels) together pass through composite roll, through composite roll pressing, by winder rolling, obtain the semi-finished product of flexible back plate again.
According to same way by semi-finished product after unreeling machine unreels tiling, 2 × 10
-3under Pa, 25 ℃ of conditions, controlling high purity oxygen gas (99.99%) is 1:3 with high-purity argon gas gas mass flow ratio, magnetron sputtering monocrystalline silicon 300min on semi-finished product, obtains the flexible back plate with membranous layer of silicon oxide (inoranic membrane gas barrier layer), and silicon oxide film layer thickness is 5 μ m.Detect its water vapor transmittance 0.9g/m
224h.
Backboard sample 7
The HDPE that is 300 μ m using thickness unreels through unreeling machine as insulating barrier, then acrylate adhesive automatic charging, after bonding agent is coated with on insulating barrier through three sections of bellows air drafts, length is 10m-30m, linear velocity is 5m/min-40m/min, and the fluorine film weathering layer (unreeling machine by the other end unreels) that is the PVF of 30 μ m at the production line other end and thickness together passes through composite roll, through composite roll pressing, by winder rolling, obtain the semi-finished product of flexible back plate again.
According to same way by semi-finished product after unreeling machine unreels tiling, then by positive silicoacetic acid ester: absolute ethyl alcohol: distilled water is that 7.6 mixed liquor is sprayed on semi-finished product for 1:15:9.5 is mixed into pH value in molar ratio, spraying 160S, then be dried 2 hours at 120 ℃, acquisition has the flexible back plate of membranous layer of silicon oxide (inoranic membrane gas barrier layer), and silicon oxide film layer thickness is 40 μ m.Detecting its water vapor transmittance is 1.4g/m
224h.
Backboard sample 8
The HDPE that is 250 μ m using thickness unreels through unreeling machine as insulating barrier, then acrylate adhesive automatic charging, after described bonding agent is coated with on insulating barrier through three sections of bellows air drafts, length is 10m-30m, linear velocity is 5m/min-40m/min, and the fluorine film weathering layer (unreeling machine by the other end unreels) that is the PVF of 30 μ m at the production line other end and thickness together passes through composite roll, through composite roll pressing, by winder rolling, obtain the semi-finished product of flexible back plate again.
According to same way by semi-finished product after unreeling machine unreels tiling, 2 × 10
-3under Pa, 200 ℃ of conditions, controlling high purity oxygen gas (99.99%) is 1:3 with high-purity argon gas gas mass flow ratio, Magnetron Sputtered Al target 300min on semi-finished product substrate, obtains the flexible back plate with membranous layer of silicon oxide (inoranic membrane gas barrier layer), and silicon oxide film layer thickness is 6.4 μ m's.Detecting its water vapor transmittance is 0.6g/m
224h.
Backboard sample 9
The HDPE that is 250 μ m using thickness unreels through unreeling machine as insulating barrier, then acrylate adhesive automatic charging, after bonding agent is coated with on insulating barrier through three sections of bellows air drafts, length is 10m-30m, linear velocity is 5m/min-40m/min, and the fluorine film weathering layer (unreeling machine by the other end unreels) that is the PV of 30 μ m at the production line other end and thickness together passes through composite roll, through composite roll pressing, by winder rolling, obtain the semi-finished product of flexible back plate again.
According to same way by semi-finished product after unreeling machine unreels tiling, then by titanic acetic acid esters: absolute ethyl alcohol: distilled water is that 7.6 mixed liquor is sprayed on semi-finished product for 1:15:10 is mixed into pH value in molar ratio, spraying 160S, then be dried 2 hours at 120 ℃, obtain the flexible back plate with titanium oxide layer (inoranic membrane gas barrier layer).Oxidation titanium film layer thickness is 40 μ m's.Detecting its water vapor transmittance is 1.4g/m
224h.
All moisture-vapor transmission test reference standard A STM F1249 in the present invention, adopt water vapor permeation rate tester, test moisture-vapor transmission value.
Known by foregoing description, in the execution mode of above-mentioned backboard sample 1-9, the water vapor transmittance of each flexible back plate is not more than 2g/m
224h, has good water resistance.Adopt described inoranic membrane gas barrier layer to guarantee that backboard has lower water resistance, thereby can reduce the use of fluorine membrane material, reduced cost.
Fluorine film has cracking and embrittlement problem when thicker, backboard bending easily causes that fluorine film is hidden to be split or even rupture, thereby affect the waterproof anti-uv-ray of backboard, and the present embodiment employing can by coating or coating process forms described inoranic membrane gas barrier layer, can form the film layer structure of thinner thickness, with respect to traditional fluorine film backboard, there is good bending property, avoid splitting because backboard bending easily causes the hidden of rete.
Described inoranic membrane gas barrier layer has good insulation property, has improved backboard arc resistant breakdown capability.Especially for described inoranic membrane gas barrier layer is arranged on to outermost back board structure, because inoranic membrane gas barrier layer has wear-resisting and ageing resistace preferably, improve the wear-resistant and ageing resistace of backboard, can effectively reduce the possibility of the scuffing of backboard in production and use procedure.
The application another embodiment also provide a kind of photovoltaic module, and described photovoltaic module comprises: the flexible back plate being oppositely arranged and cover plate; Solar cell string, described solar cell was ganged up encapsulating material and was fixed between described flexible back plate and described cover plate; Wherein, described flexible back plate is the flexible back plate described in any execution mode of above-described embodiment.
Described solar cell string can be one or more in monocrystaline silicon solar cell, polysilicon solar cell, class monocrystalline solar cells and the heterojunction solar battery based on crystalline silicon.
Described encapsulating material can be polyethylene-hexenoic acid ethyl ester or polyvinyl butyral resin or polyurethane elastomer or TPO or thermosetting polyolefin or polyethylene-acetic acid esters ionomer.
Described in the present embodiment, flexible back plate described in photovoltaic module employing above-described embodiment, has good water resistance.And adopt the inoranic membrane gas barrier layer that cheaply prepared by inorganic material to realize water resistance, reduced the use of fluorine membrane material, reduced cost.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple modification of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a flexible back plate, is characterized in that, comprising:
Insulating barrier, described insulating barrier is for fitting with the solar cell string of photovoltaic module;
Be arranged on inoranic membrane gas barrier layer and the fluorine film weathering layer of described insulating barrier the same side.
2. flexible back plate according to claim 1, is characterized in that, described fluorine film weathering layer is arranged between described insulating barrier and described inoranic membrane gas barrier layer;
Or described inoranic membrane gas barrier layer is arranged between described insulating barrier and described fluorine film weathering layer.
3. flexible back plate according to claim 1, is characterized in that, described insulating barrier is any one single layer structure in poly terephthalic acid class plastic film, density polyethylene film with high, fibrous paper film, mica film or the laminated construction of multiple formation.
4. flexible back plate according to claim 3, is characterized in that, the thickness of described insulating barrier is 100 μ m-300 μ m, comprises endpoint value.
5. flexible back plate according to claim 1, is characterized in that, the water vapor transmittance of described inoranic membrane gas barrier layer is not more than 2g/m
224h.
6. flexible back plate according to claim 5, it is characterized in that, described inoranic membrane gas barrier layer is any one single layer structure in silicon oxide film, silicon nitride film, boron nitride film, diamond-like carbon film, aluminum oxide film, aln precipitation film, Titanium oxide film, titanium nitride film or the laminated construction of multiple formation.
7. flexible back plate according to claim 5, is characterized in that, the thickness of described inoranic membrane gas barrier layer is 5 μ m-50 μ m, comprises endpoint value.
8. flexible back plate according to claim 1, it is characterized in that, described fluorine film weathering layer is any one single layer structure in polyvinyl fluoride thin film, polyvinylidene difluoride film, chlorotrifluoroethylene-ethylene copolymer film, hexafluoropropylene (HFP)/tetrafluoroethylene (TFE)-vinylidene fluoride copolymers plastic film or the laminated construction of multiple formation.
9. flexible back plate according to claim 8, is characterized in that, the thickness of described fluorine film weathering layer is 10 μ m-50 μ m, comprises endpoint value.
10. a photovoltaic module, is characterized in that, comprising:
The flexible back plate being oppositely arranged and cover plate;
Solar cell string, described solar cell was ganged up encapsulating material and was fixed between described flexible back plate and described cover plate;
Wherein, described flexible back plate is the flexible back plate described in claim 1-9 any one.
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| CN201410071736.8A CN103794670A (en) | 2014-02-28 | 2014-02-28 | Flexible backplane and photovoltaic module |
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| CN105161558A (en) * | 2015-08-06 | 2015-12-16 | 中国乐凯集团有限公司 | Solar cell packaging film |
| CN105576056A (en) * | 2014-11-06 | 2016-05-11 | 汉能新材料科技有限公司 | Flexible packaging composite film |
| CN106159009A (en) * | 2015-03-26 | 2016-11-23 | 汉能新材料科技有限公司 | A kind of flexible package composite membrane and manufacture method thereof |
| CN106374003A (en) * | 2016-11-04 | 2017-02-01 | 秦皇岛博硕光电设备股份有限公司 | Solar cell component and backboard used by same |
| CN108091713A (en) * | 2017-12-12 | 2018-05-29 | 苏州亿拓光电科技有限公司 | A kind of substrate of flexible solar photovoltaic module and flexible solar photovoltaic module |
| CN108172650A (en) * | 2018-02-09 | 2018-06-15 | 赫里欧新能源科技（上海）有限公司 | Solar energy photovoltaic component and building integrated photovoltaic component |
| CN108831940A (en) * | 2018-06-13 | 2018-11-16 | 晶科能源科技（海宁）有限公司 | Improve the photovoltaic module and preparation method thereof of Reflecting backboard |
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| CN108091713A (en) * | 2017-12-12 | 2018-05-29 | 苏州亿拓光电科技有限公司 | A kind of substrate of flexible solar photovoltaic module and flexible solar photovoltaic module |
| CN108172650A (en) * | 2018-02-09 | 2018-06-15 | 赫里欧新能源科技（上海）有限公司 | Solar energy photovoltaic component and building integrated photovoltaic component |
| CN108831940A (en) * | 2018-06-13 | 2018-11-16 | 晶科能源科技（海宁）有限公司 | Improve the photovoltaic module and preparation method thereof of Reflecting backboard |
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Application publication date: 20140514 |