CN105470327B

CN105470327B - Photovoltaic module

Info

Publication number: CN105470327B
Application number: CN201410432383.XA
Authority: CN
Inventors: 孙翔; 王申存; 姜占锋; 尹力
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2014-08-28
Filing date: 2014-08-28
Publication date: 2018-01-23
Anticipated expiration: 2034-08-28
Also published as: CN105470327A

Abstract

The invention discloses a kind of photovoltaic module, including：Foreboard；First encapsulated layer, first encapsulated layer are located on the foreboard；The cell piece being located on the first encapsulated layer, foreboard are Nian Jie by the first encapsulated layer with cell piece；And lower cover, the lower cover are bonded in the side of the remote foreboard of the cell piece, the lower cover includes POE, peroxide type crosslinking agent, crosslinking coagent and silane coupler.Photovoltaic module according to embodiments of the present invention; lower cover can be protected effectively to the cell piece; substitute traditional expensive backboard and the second encapsulated layer; it is possible thereby to simplify the structure and production technology of the photovoltaic module; the manufacturing cost of the photovoltaic module is reduced, improves the production efficiency of the photovoltaic module.Be not in delamination, phenomena such as ftractureing of bubbling, so as to improve the service life of the photovoltaic module in addition, by the way that lower cover is formed into the structure being integrated.

Description

Photovoltaic module

Technical field

The present invention relates to a kind of photovoltaic module.

Background technology

In existing photovoltaic module, the backboard used has Tedlar/PET/Tedlar and Tedlar/PET/EVA.It is this Backboard has used Tedlar with high costs to be used as insulating barrier using PET as coat.The TPT backboards of better performances are present The defects of cost is high.And phenomena such as xanthochromia, cracking, efflorescence easily occurs without using the backboard including Tedlar, photovoltaic module Power and life-span can all be affected.

In addition, existing photovoltaic module includes foreboard, the first encapsulated layer, cell piece, the second encapsulated layer stacked gradually And backboard, its dorsulum include three daughter boards to be bonded together by bonding agent.After a period of time, it may appear that backboard with Phenomena such as second encapsulation delamination layer, backboard foaming cracking, shorten the service life of backboard.

Also use glass as the photovoltaic module of backboard, this photovoltaic module has that weight is big, manufacturing cost is high, inconvenient In the production and installation the defects of.

The content of the invention

It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention One purpose is to propose one kind with service life is long, simple in construction, manufacturing cost is low, simple production process, production efficiency The photovoltaic module of the advantages that high.

Photovoltaic module according to embodiments of the present invention includes：Foreboard；First encapsulated layer, first encapsulated layer are located at described On foreboard；Cell piece, the cell piece are located on first encapsulated layer, and the foreboard passes through described first with the cell piece Encapsulated layer is bonded；And lower cover, the lower cover are bonded in the side of the remote foreboard of the cell piece, the lower cover Including ethylene-octene copolymer, peroxide type crosslinking agent, crosslinking coagent and silane coupler.

Photovoltaic module according to embodiments of the present invention, lower cover can be protected effectively to the cell piece, substitute Traditional expensive backboard and the second encapsulated layer, it is possible thereby to simplify the structure and production technology of the photovoltaic module, drop The manufacturing cost of the low photovoltaic module, improve the production efficiency of the photovoltaic module.In addition, by the way that lower cover is formed as into one Phenomena such as structure of body is not in delamination, foaming cracking, so as to improve the service life of the photovoltaic module.Therefore, Photovoltaic module according to embodiments of the present invention have service life is long, simple in construction, manufacturing cost is low, simple production process, life Produce efficiency high, it is in light weight the advantages that.

Brief description of the drawings

Fig. 1 is the structural representation of photovoltaic module according to embodiments of the present invention.

Reference：

Photovoltaic module 10, foreboard 101, the first encapsulated layer 102, cell piece 103, lower cover 104, toughness reinforcing silk screen layer 105

Embodiment

Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.

In the description of the invention, it is to be understood that term " length ", " width ", " thickness ", " on ", " under ", The orientation or position relationship of the instruction such as "left", "right", " top ", " bottom " are based on orientation shown in the drawings or position relationship, are only Described for the ease of description is of the invention with simplified, rather than the device or element of instruction or hint meaning must be with specifically sides Position, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " It is only used for describing purpose, and it is not intended that indicating or implying relative importance or imply the technical characteristic indicated by indicating Quantity.Thus, " first " is defined, at least one this feature can be expressed or be implicitly included to the feature of " second ".At this In the description of invention, " multiple " are meant that at least two, such as two, three etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly defined and limited, the term such as term " connection ", " fixation " should do broad sense reason Solution, for example, it may be fixedly connected or be detachably connected, or integrally；Can be joined directly together, can also pass through Intermediary is indirectly connected, and can be connection or the interaction relationship of two elements of two element internals, unless otherwise bright True restriction.For the ordinary skill in the art, above-mentioned term can be understood as the case may be in the present invention Concrete meaning.

Photovoltaic module 10 according to embodiments of the present invention is described below with reference to Fig. 1.As shown in figure 1, implemented according to the present invention The photovoltaic module 10 of example includes stacking gradually stacked foreboard 101, the first encapsulated layer 102, cell piece 103 and lower cover 104.For It is easy to describe, figure 1 illustrates above-below direction, above-below direction is as shown in the arrow A in Fig. 1.Foreboard 101 can be glass plate 101, such as foreboard 101 can be armorplate glass.

First encapsulated layer 102 is located on foreboard 101, and cell piece 103 is located on the first encapsulated layer 102.Lower cover 104 is bonded In the side of the remote foreboard 101 of cell piece 103 (i.e. downside in Fig. 1), lower cover 104 includes ethylene-octene copolymer, mistake Oxide type crosslinking agent, crosslinking coagent and silane coupler.Wherein, ethylene-octene copolymer, peroxide type crosslinking agent, friendship Join auxiliary agent and silane coupler when being prepared into lower cover 104, produce certain chemical reaction so as to which lower cover 104 be formed as Firm integrative-structure.That is, photovoltaic module 10 according to embodiments of the present invention replaces traditional the by lower cover 104 Two encapsulated layers and backboard.

Wherein peroxide type crosslinking agent is used for the cross-linking reaction for inducing polyolefin, and crosslinking coagent is used to promote crosslinking anti- Should, silane coupler is used to increase cementability.Moreover, the water vapor transmittance of ethylene-octene copolymer is very low, ethylene-octene The water vapor transmittance of copolymer is suitable with the water vapor transmittance of existing TPT (Tedlar/PET/Tedlar) backboard, i.e. the first envelope The water vapor transmittance for filling layer 102 and lower cover 104 is suitable with the water vapor transmittance of existing TPT backboards.In addition, ethylene-octene The specific insulation of copolymer is more than ten times of EVA specific insulation, and the specific insulation of ethylene-octene copolymer is with gathering The specific insulation of ethylene glycol terephthalate (PET) is suitable.It is possible thereby to make the first encapsulated layer 102 and lower cover 104 more Add the electrical property for effectively protecting cell piece 103.

In some embodiments of the invention, the lower cover based on 100 parts by weight includes：The octene of 27-46 parts by weight, The ethene of 46-64 parts by weight, the peroxide type crosslinking agent of 0.45-1 parts by weight, 0.1-1 parts by weight crosslinking coagent and 0.1 The silane coupler of -0.4 part of part.As a result, lower cover 104 has good intensity, toughness, the scratch-resistant of lower cover 104 Performance is more excellent than the scraping and wiping resistance performance of the backboard of existing photovoltaic module, has good protective effect to cell piece 103, So that photovoltaic module 10 need not set expensive backboard, it is possible thereby to simplify the structure and production technology of photovoltaic module 10, The manufacturing cost of photovoltaic module 10 is reduced, improves the production efficiency of photovoltaic module 10.

Advantageously, the thickness of lower cover 104 can be in the range of 0.2 millimeter to 2 millimeters.Thus lower cover can not only be made Plate 104 can preferably protect cell piece 103, and can reduce the manufacturing cost of lower cover 104.

In some optional embodiments, the first encapsulated layer 102 includes ethylene-octene copolymer, peroxide type is crosslinked Agent, crosslinking coagent and silane coupler, wherein the first encapsulated layer based on 100 parts by weight includes：The octene of 30-50 parts by weight, The ethene of 50-70 parts by weight, the peroxide type crosslinking agent of 0.5-1 parts by weight, 0.1-1 parts by weight crosslinking coagent and The silane coupler of 0.1-0.4 parts by weight.Thus the first encapsulated layer 102 can preferably protect cell piece 103, so as to enter One step improves the service life of photovoltaic module 10.

The peroxide type crosslinking agent mentioned in above-described embodiment be selected from tert-butyl hydroperoxide -2- ethylhexyl carbonates, Benzylhydroperoxide tert-pentyl ester, 2,2- double (tertiary cyclopentadienyl peroxide)-butane, tert butyl peroxy benzoate, tert-butyl hydroperoxide -2- second Double (the t-butyl peroxies of base capronate, double (t-butylperoxyisopropyl) benzene, tert-butyl hydroperoxide-butylperoxyisopropyl carbonate, 1,1- Base) -3,5,5- trimethyl-cyclohexanes and tert-butyl hydroperoxide -3,5, the one or more in 5- tri-methyl hexanoic acid esters.At one In specific embodiment, peroxide type crosslinking agent can be tert-butyl hydroperoxide -2- ethylhexyl carbonates.

The crosslinking coagent mentioned in above-described embodiment is selected from trihydroxy methyl propane trimethyl acrylic ester, triallyl benzene One or more in three acid esters, diallyl phthalate and trihydroxy methyl propane triacrylate, the silane The one kind or more of coupling agent in vinyl trichlorosilane, vinyltrimethoxy silane and VTES Kind.

In some embodiments of the invention, lower cover 104 is light tight.It is possible thereby to it is good to have lower cover 104 Light-reflecting property, so as to reduce because encapsulating loss caused by printing opacity.Certainly, the invention is not restricted to this.Lower cover 104 also may be used With partial light permeability.

Alternatively, lower cover 104 further comprises weatherable powder, and the weatherable powder is selected from titanium dioxide, aluminum oxide, fluorine Carbon resin, PDAIP, Kynoar, polyethylene, polytetrafluoroethylene (PTFE), fluorocarbon resin be polymer-modified, At least one of polymer-modified and polyvinylidene fluoride modified polymer of PDAIP.Wherein, based on 100 The weatherable powder layer of parts by weight includes：The octene of 27-46 parts by weight, the ethene of 46-64 parts by weight, the peroxide of 0.45-1 parts by weight Compound type crosslinking agent, the crosslinking coagent of 0.1-1 parts by weight, the silane coupler of 0.1-0.4 parts by weight, 6-10 parts by weight it is weather-proof Powder.It is possible thereby to reduce the manufacture difficulty of lower cover 104.

In the further embodiment of the present invention, lower cover can also include fire retardant, and the fire retardant is selected from three oxygen Change in two antimony, magnesium hydroxide, aluminium hydroxide, silicon-series five-retardant, bromide fire retardant, phosphorus-nitrogen containing flame retardant and nitrogenated flame retardant extremely Few one kind.It is possible thereby to make lower cover 104 that there is better flame resistance, so as to increase the fire protecting performance of photovoltaic module 10 And fire-protection rating.

Wherein, the lower cover based on 100 parts by weight includes：The octene of 27-46 parts by weight, the ethene of 46-64 parts by weight, The peroxide type crosslinking agent of 0.45-1 parts by weight, the crosslinking coagent of 0.1-1 parts by weight, 0.1-0.4 parts by weight it is silane coupled The fire retardant of agent, the weatherable powder of 6-10 parts by weight and 1-2 parts by weight.

According to some embodiments of the present invention, photovoltaic module still further comprises toughness reinforcing silk screen layer 105, the toughness reinforcing silk screen Layer 105 is located between cell piece 103 and lower cover 104, and at least a portion of toughness reinforcing silk screen layer 105 is immersed in the lower cover, To make toughness reinforcing silk screen layer 105 be integrally formed with lower cover 104.Thus the structural strength of lower cover 104 can not only be increased, and And lower cover 104 can be obstructed and spread to cell piece 103.Specifically, lower cover 104 is heated, after being heated due to lower cover 104 Mobility is very strong, and toughness reinforcing silk screen layer 105 can be immersed in lower cover 104.Alternatively, under whole toughness reinforcing silk screen layers 105 immerse In cover plate 104.Alternatively, toughness reinforcing silk screen layer 105 by glass fabric, glass mat and modified glass-fiber cloth at least One kind is made.

In some embodiments of the invention, all band light transmittance of the first encapsulated layer is more than or equal to 90%.It is possible thereby to The light for making more to cross passes through the first encapsulated layer 102.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification Close and combine.

Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changed, replacing and modification.

Claims

A kind of 1. photovoltaic module, it is characterised in that including：

Foreboard；

First encapsulated layer, first encapsulated layer are located on the foreboard；

Cell piece, the cell piece are located on first encapsulated layer, and the foreboard passes through first envelope with the cell piece Fill layer bonding；With

Lower cover, the lower cover are bonded in the side of the remote foreboard of the cell piece, the lower cover include ethene- Octene copolymer, peroxide type crosslinking agent, crosslinking coagent and silane coupler, wherein, the lower cover bag based on 100 parts by weight Include：The octene of 27-46 parts by weight, the ethene of 46-64 parts by weight, the peroxide type crosslinking agent of 0.45-1 parts by weight, 0.1-1 weights Measure part crosslinking coagent and 0.1 part -0.4 part of silane coupler；

Toughness reinforcing silk screen layer, the toughness reinforcing silk screen layer are located between the cell piece and the lower cover, the toughness reinforcing silk screen layer At least a portion is immersed in the lower cover.
2. photovoltaic module according to claim 1, it is characterised in that the thickness of the lower cover is at 0.2 millimeter to 2 millimeters In the range of.
3. photovoltaic module according to claim 1, it is characterised in that first encapsulated layer is copolymerized including ethylene-octene Thing, peroxide type crosslinking agent, crosslinking coagent and silane coupler, wherein the first encapsulated layer based on 100 parts by weight includes： The octene of 30-50 parts by weight, the ethene of 50-70 parts by weight, the peroxide type crosslinking agent of 0.5-1 parts by weight, 0.1-1 parts by weight Crosslinking coagent and 0.1-0.4 parts by weight silane coupler.
4. according to the photovoltaic module any one of claim 1-3, it is characterised in that the peroxide type crosslinking agent choosing From tert-butyl hydroperoxide -2- ethylhexyl carbonates, benzylhydroperoxide tert-pentyl ester, 2,2- double (tertiary cyclopentadienyl peroxide)-butane, the tert-butyl groups Peroxide benzoate, tert-butyl hydroperoxide -2 ethyl hexanoic acid ester, double (t-butylperoxyisopropyl) benzene, t-butyl peroxy Change-butylperoxyisopropyl carbonate, 1,1- bis(t-butylperoxy)s -3,5,5- trimethyl-cyclohexanes and tert-butyl hydroperoxide -3,5,5- One or more in tri-methyl hexanoic acid ester.
5. photovoltaic module according to claim 4, it is characterised in that the peroxide type crosslinking agent is t-butyl peroxy Change -2- ethylhexyl carbonates.
6. according to the photovoltaic module any one of claim 1-3, it is characterised in that the crosslinking coagent is selected from trihydroxy Trimethacrylate, triallyl benzenetricarboxylic acid ester, diallyl phthalate and trihydroxy methyl propane One or more in triacrylate, the silane coupler are selected from vinyl trichlorosilane, vinyltrimethoxy silane With the one or more in VTES.
7. according to the photovoltaic module any one of claim 1-3, it is characterised in that the lower cover is light tight.
8. photovoltaic module according to claim 7, it is characterised in that the lower cover further comprises weatherable powder, institute State weatherable powder and be selected from titanium dioxide, aluminum oxide, fluorocarbon resin, PDAIP, Kynoar, poly- second Alkene, polytetrafluoroethylene (PTFE), fluorocarbon resin are polymer-modified, PDAIP is polymer-modified and Kynoar changes At least one of property polymer.
9. photovoltaic module according to claim 8, it is characterised in that the weatherable powder layer based on 100 parts by weight includes： The octene of 27-46 parts by weight, the ethene of 46-64 parts by weight, the peroxide type crosslinking agent of 0.45-1 parts by weight, 0.1-1 weight Crosslinking coagent, the silane coupler, the weatherable powder of 6-10 parts by weight of 0.1-0.4 parts by weight of part.
10. photovoltaic module according to claim 9, it is characterised in that the lower cover further comprises fire retardant, described Fire retardant is selected from antimony oxide, magnesium hydroxide, aluminium hydroxide, silicon-series five-retardant, bromide fire retardant, phosphorus-nitrogen containing flame retardant and nitrogen At least one of flame retardant.
11. photovoltaic module according to claim 10, it is characterised in that the lower cover based on 100 parts by weight includes： The octene of 27-46 parts by weight, the ethene of 46-64 parts by weight, the peroxide type crosslinking agent of 0.45-1 parts by weight, 0.1-1 weight Part crosslinking coagent, the silane coupler of 0.1-0.4 parts by weight, the weatherable powder of 6-10 parts by weight and 1-2 parts by weight resistance Fire agent.
12. photovoltaic module according to claim 11, it is characterised in that all the toughness reinforcing silk screen layer immerses the lower cover In plate.
13. photovoltaic module according to claim 12, it is characterised in that the toughness reinforcing silk screen layer is by glass fabric, glass At least one of glass fibrofelt and modified glass-fiber cloth are made.
14. photovoltaic module according to claim 1, it is characterised in that all band light transmittance of first encapsulated layer is big In equal to 90%.