CN105576057B - Solar cell module and preparation method thereof - Google Patents
Solar cell module and preparation method thereof Download PDFInfo
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- CN105576057B CN105576057B CN201510546524.5A CN201510546524A CN105576057B CN 105576057 B CN105576057 B CN 105576057B CN 201510546524 A CN201510546524 A CN 201510546524A CN 105576057 B CN105576057 B CN 105576057B
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Classifications
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022433—Particular geometry of the grid contacts
-
- 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
-
- 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
- H01L31/049—Protective back sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0512—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module made of a particular material or composition of materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Sustainable Energy (AREA)
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Abstract
The invention discloses a kind of solar cell modules and preparation method thereof, and solar cell module includes：Upper glass plates, front adhesive film, solar cell chip arrays, back side adhesive film and the backboard being sequentially stacked, backboard are steam insulating back panel, and the water vapor transmittance of steam insulating back panel is less than 0.1mg/m2/ day, solar cell chip arrays include multiple cell pieces and conductor wire, are connected between adjacent cell piece by conductor wire, and the front of cell piece has secondary grid line, and conductor wire is welded by welding layer and secondary grid line, and welding layer contains alloy, and alloy contains Sn and Bi.Solar cell module according to embodiments of the present invention; the connection effect of conductor wire and cell piece can be improved; ensure photoelectric conversion efficiency; and upper glass plates, front adhesive film, back side adhesive film and lower glass or metallic plate can effective sealing welding layers; effective protection protects battery chip arrays; slow down the attenuation of solar cell module, extend service life.
Description
Technical field
The present invention relates to area of solar cell, more particularly to solar cell module and preparation method thereof.
Background technology
About conventional batteries piece matrix, current primary structure：The silver-colored main grid of battery passes through welding and the back of the body of adjacent cell
Face is welded, and the slurry main component for making grid line is most of the noble silver of higher price, welding to be coated with leypewter
Copper strips, common component uses EVA as encapsulating film, using high molecular material as backboard, be found that in long-term use as
Some lower defects.
First：Backboard is the macromolecule back veneer material with certain water vapor transmittance, steam and corrosivity gas in environment
Body can enter through backboard in component, corrosion cell piece and welding, reduce assembly life-span；Second：The TPT backboards of better performances
Cost is very high, and common non-Tedler backboards are easy to that xanthochromia, cracking, dusting etc. occurs after a period of time use, component
The reason of power and service life can all be affected, the component lightning line found in the recent period lies also in this；Third, high molecular material it is resistance to
Mill property is relatively low, and the anti-aging layer on windy and dusty area, backboard is worn quickly, leads to pet layer (or copper functional layer) exposure
In air, and pet layer is more easy to wear, and the wearability of component entirety is relatively low；4th, backboard itself is flexible material, overleaf
For cell piece substantially without physical protection, cell piece is easy to crack when being under pressure or hitting；5th, although being added in EVA
Ultraviolet absorber, but under prolonged open air is exposed to the sun, ultraviolet absorber can gradually be consumed.It is comprehensive in ultraviolet light and steam
Under cooperation is used, xanthochromia of degrading can occur for EVA, reduce component power output, and generate the small molecules such as acetic acid, can equally corrode weldering
Band and cell piece shorten assembly life-span and reduce efficiency.
In addition, cell piece and the welding of welding generally use Sn, Pb alloy, but there is environment because containing Pb in Sn, Pb alloy
Pollution, non-green material are unfavorable for promoting the use of.
Invention content
The application is that the discovery of following facts and problem and understanding are made based on inventor：
In the relevant technologies, the front of solar battery sheet is usually provided with main gate line and secondary grid line, for exporting cell piece
Pass through electric current caused by photoelectric effect or photochemical effect.In order to improve the efficiency of cell piece, current solar cell
Manufacturer all is being dedicated to studying the quantity for how improving main gate line.Main grid is successfully increased to 3 from 2 in the prior art
Root or even raising are to 5.
But in the prior art, main gate line is prepared by printing the slurry that main component is expensive silver
, therefore, manufacturing cost is very high, and increasing the radical of silver-colored main gate line necessarily leads to the increase of cost.Meanwhile existing silver master
The width of grid line is big (for example, width reaches more than 2mm), increases the radical of silver-colored main gate line and can also increase to shading-area, leads to electricity
The transfer efficiency of pond piece reduces.
Therefore, it will be printed on cell piece originally from the angle for reducing cost, reducing shading-area, the relevant technologies
Silver-colored main gate line replace with wire, such as copper wire, welded by copper wire and secondary grid line, and then copper wire is electric as main gate line export
Stream.Due to not using silver-colored main gate line, cost can be greatly reduced, simultaneously because the diameter of copper wire is smaller, can reduce screening
Therefore light area, can further promote the quantity of main gate line to 10.This cell piece is properly termed as more main grid cell pieces
Or dereliction grid cell piece, wherein, silver-colored main grid and welding in conventional solar cell piece is substituted in wire.
And in area of solar cell, the structure of solar cell is simultaneously uncomplicated, but each structure is more crucial, main grid
Preparation consider that such as shading surface, conductivity, equipment, technique, cost etc., it is solar energy to cause it due to the factor of various aspects
Difficult point and hot spot in battery technology.Those skilled in the art just make solar energy on the market by the effort of several generations many times
Cell piece became three main grid solar cells at 2007 or so by two main grid solar cells, and a small amount of producer was at 2014 or so
The solar cell of four main grids is proposed, the technology of more main grids is also the concept just proposed in recent years, but realization is more difficult, still
There is not more ripe product.
The dereliction grid solar cell that the application proposes without setting main gate line on cell piece, without welding, reduces
Cost, and being commercialized, prepare it is simple easily realize, particularly at low cost, equipment is simple, can produce in batches, photoelectricity
Transformation efficiency is high.The mode that welding may be used with cell piece for the wire of dereliction grid solar cell disclosed in the relevant technologies is welded
It connects, because wire is thinner, there are larger stress, therefore to the binding force of wire and cell piece, there are larger requirements, corresponding
To welding layer there is also larger requirement, be generally adopted by Sn, Pb alloy, but Sn, Pb alloy are because containing in the relevant technologies
There is environment and pollute in Pb, non-green material, the present inventor has found by long-term research experiment, and Sn, Bi alloy exist
This field has application well, at low cost, but is surprisingly found that it there are critical defect when specifically used, common
In component, wire blackening in the time less than one month is the oxidation due to alloy-layer by test analysis, SnBi
It is most oxidizable, show that it can not obtain practical application on product, but the low cost and low stain of SnBi alloys show it again
For the easy-to-use welding layer alloying component of technique.
The polarization curve of Sn-Bi alloys and Sn-Pb alloys is illustrated that with reference to Figure 15, Figure 15, wherein, test condition is：
The area that the sample of test is immersed in spirit of vinegar (pH value is about 6) is about 20mm2, it is Sn to compare electrode, i.e., using gold
Category Sn is reference electrode, and the area of Sn-Bi Electrodes and Sn-Pb Electrodes used is 0.2cm2.In figure, abscissa generation
Table voltage (unit V), ordinate represent electric current (unit mA), the polarization generated under forward voltage section, same polarizing voltage
Electric current is big, it is easier to aoxidize.
It can be seen that under the same conditions by carrying out analysis to the polarization curve, Sn-Bi alloys (Figure 15 center lines a institutes
Show) be not easy to be aoxidized (shown in Figure 15 center lines b) compared to Sn-Pb alloys, i.e. the stability of Sn-Bi alloys is relatively higher, right
In the requirement of water vapor transmittance, the requirement of Sn-Bi alloys will be less than the requirement of Sn-Pb alloys.Specific to the solar energy of the application
Battery, generally use Sn-Pb alloys are welded in this field, if using the relatively higher Sn-Bi alloys of stability
It is welded, in theory, used backboard when being welded in solar cell using Sn-Pb alloys completely may be used
The anti-oxidant requirement of Sn-Bi alloys when being welded with meeting using Sn-Bi alloys.
However, present inventor has found by long-term experiment and research, in wet condition, Sn-Bi alloys
Oxidation rate is higher than the oxidation rate of Sn-Pb alloys.For this purpose, inventor is to the oxidation rate of Sn-Bi alloys and the water of backboard
Vapour through performance has made intensive studies, and it was found that, when the water vapor transmittance of backboard is more than 0.1mg/m2During/day, Sn-Bi
The oxidation rate of alloy will be accelerated with the increase of water vapor transmittance and drastically, and when the water vapor transmittance of backboard is less than or equal to
0.1mg/m2During/day, with the variation of water vapor transmittance significant changes do not occur for the oxidation rate of Sn-Bi alloys.
Inventor selects water vapor transmittance to be less than 0.1mg/m as a result,2The back veneer material of/day, it is possible to prevente effectively from Sn-Bi
The oxidation of alloy material can be good at obstructing steam, corrosive gas in environment and enter inside solar energy battery, avoids
Sn-Bi alloys phenomena such as discoloration, black can occur under the conditions of common encapsulation because of oxidation, influence solar battery life, so as to
Energy effective protection Sn-Bi alloys, are not in metachromatism, reduce the corrosion of solar cell, be effectively protected the sun
Energy battery slows down solar cell attenuation, extends solar battery life.
The application is intended to solve one of above-mentioned technical problem at least to a certain extent.
For this purpose, the present invention proposes a kind of solar cell module, which is simple to manufacture, is at low cost, light
Electric transformation efficiency is high.
The present invention also proposes a kind of preparation method of above-mentioned solar cell module.
The solar cell module of embodiment according to a first aspect of the present invention, including：The upper glass plates that are sequentially stacked, front
Adhesive film, solar cell chip arrays, back side adhesive film and backboard, the backboard are steam insulating back panel, the steam insulation
The water vapor transmittance of backboard is less than or equal to 0.1mg/m2/ day, the solar cell chip arrays include multiple cell pieces and conduction
Line is connected by the conductor wire between adjacent cell piece, and the front of the cell piece has secondary grid line, and the conductor wire passes through
Welding layer is welded with the secondary grid line, and the welding layer contains alloy, and the alloy contains Sn and Bi.
Solar cell module according to embodiments of the present invention, by the secondary grid line on cell piece and conductor wire by containing Sn
It is weldingly connected with the welding layer of the alloy of Bi, the connection effect of conductor wire and cell piece can be effectively improved, ensure opto-electronic conversion
Efficiency has been surprisingly found that such welding layer can be applied well in steam insulating back panel, upper glass plates, front glued membrane
Layer, back side adhesive film and steam insulating back panel such as glass or metallic plate can effective sealing welding layer, be not in that discoloration shows
As, the corrosion of battery chip arrays is reduced, effective protection protects battery chip arrays, slows down the attenuation of solar cell module,
Service life is extended, while its is at low cost.
The preparation method of the solar cell module of embodiment according to a second aspect of the present invention, including：By upper glass plates, just
Face adhesive film, the battery chip arrays, back side adhesive film and steam insulating back panel stack, and face the front of cell piece successively
Front adhesive film, the back side of cell piece face back side adhesive film, are then laminated to obtain the solar cell module, wherein
The solar cell chip arrays include multiple cell pieces and conductor wire, are connected between adjacent cell piece by the conductor wire,
The front of the cell piece has secondary grid line, and the conductor wire is welded by welding layer and the secondary grid line, and the welding layer contains
There is alloy, the alloy contains Sn and Bi.
Description of the drawings
Fig. 1 is the floor map according to the solar cell chip arrays of the application one embodiment.
Fig. 2 is the schematic cross-section according to the longitudinal direction of the solar cell chip arrays of the application one embodiment.
Fig. 3 is the lateral schematic cross-section according to the solar cell chip arrays of the application one embodiment.
Fig. 4 is the schematic diagram according to the wire for being used to form conductor wire of the embodiment of the present application.
Fig. 5 is the floor map according to the solar cell chip arrays of another embodiment of the application.
Fig. 6 is the floor map according to the solar cell chip arrays of the another embodiment of the application.
Fig. 7 is the schematic diagram according to the reciprocation extension of the wire of the embodiment of the present application.
Fig. 8 is the schematic diagram according to two cell pieces of the solar cell chip arrays of the embodiment of the present application.
Fig. 9 is that two cell pieces shown in Fig. 8 are formed by connecting the schematic diagrames of solar cell chip arrays by wire.
Figure 10 is the schematic diagram according to the solar cell module of the embodiment of the present application.
Figure 11 is the schematic partial cross-sectional view of solar cell module shown in Figure 10.
Figure 12 is the schematic diagram according to the solar cell chip arrays of the application another embodiment.
Figure 13 is the assembling schematic diagram according to the solar battery sheet component of the application.
Figure 14 is the wire in tension schematic diagram of comparative example 1.
Figure 15 is the polarization curve of Sn-Bi alloys and Sn-Pb alloys.
Reference numeral：
Cell piece component 100；
Upper glass plates 10；
Front adhesive film 20；
Battery chip arrays 30；Cell piece 31；First cell piece 31A；Second cell piece 31B；Battery sheet matrix 311；Secondary grid
Line 312；Positive pair grid line 312A；Back side pair grid line 312B；Edge pair grid line 3121；Intermediate pair grid line 3122；Weld part 3123；
Carry on the back electric field 313；Back electrode 314；
Conductor wire 32；Front side conductive line 32A；Back side conductor wire 32B；Wire ontology 321；Welding layer 322；Short grid line
33；
Back side adhesive film 40；
Steam insulating back panel 50；Reflecting coating 51；
U-frame 60；
Terminal box 70；
Mounting blocks 80.
Specific embodiment
The embodiment of the present invention is 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 this application, in order to more clear and convenient for description, part term is explained below.
Term " cell piece 31 " including battery sheet matrix 311, the secondary grid line 312 being located on 311 front of battery sheet matrix, set
Back of the body electric field 313 and the back electrode 314 that is located on back of the body electric field 313 at the back side of battery sheet matrix 311, as a result, secondary grid line 312
The secondary grid line 312 of cell piece 31 is properly termed as, back of the body electric field 313 is referred to as the back of the body electric field 313 of cell piece 31, back electrode 314
It is referred to as the back electrode 314 of cell piece 31.
" battery sheet matrix 311 " is such as can the process as silicon chip through making herbs into wool, diffusion, etching edge, deposited silicon nitride layer
The intermediate products obtained afterwards, it should be understood that in the application, battery sheet matrix 311 is not limited to be made of silicon chip, example
Thin-film solar cells matrix or other any suitable solar cell sheet matrixes 311 can also such as be included.
In other words, cell piece 31 includes silicon chip, to some process layers of silicon chip surface, the secondary grid line of light-receiving surface and shady face
Back of the body electric field 313 and back electrode 314 or equivalent other class solar cells without front electrode, such as various thin-film electros
Pond：Amorphous silicon film battery (a-Si), cadmium-Te solar battery (CdTe), CIGS solar cell (CIGS), GaAs are too
The non-crystalline silicons batteries such as positive electricity pond, nano-titanium dioxide dye-sensitized solar cells.
The conductor wire 32 that term " battery unit " is formed including cell piece 31 and by wire S.
Term " solar cell chip arrays 30 " is connected and with by adjacent cell piece 31 by metal including multiple cell pieces 31
The conductor wire 32 that silk S is formed, in other words, solar cell chip arrays 30 are by multiple 31 rows of cell piece being connected by conductor wire 32
It arranges.
In solar cell chip arrays 30, wire S forms the conductor wire 32 of battery unit, and wire S extends in phase
It should broadly understood between the surface of adjacent cell piece 31, wire S can extend between the front of adjacent cell piece 31, also may be used
To extend between the front of a cell piece 31 in adjacent cell piece 31 and the back side of another cell piece 31.In wire
When S is extended between the front of in adjacent cell piece 31 cell piece 31 and the back side of another cell piece 31, conductor wire
32 can include extending in the front side conductive line 32A being electrically connected on the front of cell piece 31 and with the secondary grid line 312 of cell piece 31,
And extend in the back side conductor wire 32B being electrically connected on the back side of cell piece 31 and with the back electrode 314 of cell piece 31, wire
Parts of the S between adjacent cell piece 31 is properly termed as connection conductor wire.
In this application, battery sheet matrix 311, cell piece 31, battery unit, battery chip arrays 30 and solar battery group
Part is intended merely to facilitate description, and it is not intended that limitation to the application.
All ranges disclosed in this application can all be combined comprising endpoint and independently.Model disclosed herein
The endpoint and any value enclosed is not limited to the accurate range or value, these ranges or value should be understood to include close to these models
It encloses or the value of value.
In this application, unless otherwise indicated, directional terminology such as " upper and lower " typically refers to shown in the drawings upper and lower；" just
Face " refers to solar cell module in application process towards the one side of light namely light-receiving surface；" back side " refers to solar-electricity
Pond component is in application process back to the one side of light.
The solar battery sheet component according to the embodiment of the present application is specifically described below in conjunction with the accompanying drawings.
As shown in figure 1 to figure 13, the upper glass being sequentially stacked is included according to the solar cell module of the embodiment of the present application
Plate 10, front adhesive film 20, solar cell chip arrays 30, back side adhesive film 40 and steam insulating back panel 50, water vapor transmittance
WVTR is less than or equal to 0.1mg/m2/ day, it is preferable that the permeability rate of steam insulating back panel is 0, air penetrability 0, solar cell
Chip arrays 30 include multiple cell pieces 31 and conductor wire 32, are connected between adjacent cell piece 31 by the conductor wire 32, battery
The front of piece 31 has secondary grid line 312, and conductor wire 32 is welded by welding layer and secondary grid line 312, and welding layer contains alloy, alloy
Contain Sn and Bi.
In other words, upper glass plates 10, just are included according to the solar cell module of the embodiment of the present application successively from top to bottom
Face adhesive film 20, solar cell chip arrays 30, back side adhesive film 40 and steam insulating back panel 50, wherein, solar battery sheet
Array 30 is made of at least two cell pieces 31, is connected between two neighboring cell piece 31 by a plurality of conductor wire 32, conductor wire
32 are welded by the positive secondary grid line 312 of welding layer and cell piece 31, and welding layer mainly includes the alloy of Sn and Bi.
Conductor wire 32 is weldingly connected with secondary grid line 312, the conductor wire 32 in solar cell module will not occur drift and
Rosin joint, and show relatively high electricity conversion.
According to the solar cell module of the embodiment of the present application, steam insulating back panel 50 can be glass or metallic plate,
In, metallic plate can be aluminium sheet.
It should be noted that the application can be good at obstructing using the closely knit glass of levels and steam insulating back panel
Steam, corrosive gas in environment enter component internal.And the welding layer use of conductor wire 32 and the secondary welding of grid line 312 is low
Melting alloy is the alloy containing Sn, Bi metal, and corrosion resistance is commonly being sealed less than the metal Sn on welding surface in traditional components
Phenomena such as discoloration, black can occur because of oxidation under the conditions of dress, influence assembly life-span.And the application is all-sealed structure, it can be effective
Sn, Bi alloy are protected, is not in metachromatism, reduces the corrosion of battery chip arrays 30, be effectively protected cell piece battle array
Row 30 slow down component attenuation, extend assembly life-span.
As a result, according to the solar cell module of the embodiment of the present application 100, by the secondary grid line 312 on cell piece 31 with leading
Electric wire 32 is weldingly connected by the welding layer containing Sn and the alloy of Bi, can effectively improve the company of conductor wire 32 and cell piece 31
Effect is connect, ensures photoelectric conversion efficiency, and upper glass plates 10, front adhesive film 20, back side adhesive film 40 and the steam insulation back of the body
Plate 50 can effective sealing welding layer, be not in metachromatism, reduce the corrosion of battery chip arrays, effective protection protects
Battery chip arrays slow down the attenuation of solar cell module, extend service life.
According to one embodiment of the application, solar cell chip arrays 30 include multiple cell pieces 31, adjacent cell piece
It is connected between 31 by wire, surface and another cell piece of a cell piece 31 of the wire in adjacent cell piece 31
Reciprocation extension to be to form multiple conductor wires 32 between 31 surface, and the front of cell piece 31 is equipped with secondary grid line 312, conductor wire with
Secondary grid line 312 welds.
Here, cell piece 31 forms electricity with the conductor wire 32 formed by extending in the wire S on 31 surface of cell piece
In other words pool unit, is made of, multiple batteries according to the solar cell chip arrays 30 of the embodiment of the present application multiple battery units
The conductor wire 32 of unit is made of wire S of the reciprocation extension on the surface of adjacent cell piece 31.
It is to be appreciated that in this application, term " reciprocation extension " is referred to as " coiling ", can refer to wire
S extends between the surface of cell piece 31 along reciprocal stroke.
In this application, " wire S reciprocation extensions are between the surface of cell piece 31 " should broadly understood, for example, golden
Belong to silk S can with the surface of a cell piece 31 of the reciprocation extension in adjacent cell piece 31 and the surface of another cell piece 31 it
Between, wire S can also extend through 31 surface of intermediate cell piece of predetermined quantity to most from the surface of first cell piece 31
Then the surface of the latter cell piece 31 returns from the surface of the last one cell piece 31 and extends through the predetermined quantity
The surface of intermediate cell piece 31 to the surface of first cell piece 31 so repeats.
In addition, when cell piece 31 is by wire S parallel connections, wire S can with reciprocation extension on the front of cell piece,
In the case, wire S forms the front side conductive line 32A of cell piece, and optionally, wire S reciprocation extensions are in cell piece 31
Front on and different wire S reciprocation extensions on the back side of cell piece 31, in the case, extending in cell piece 31 just
Wire S on face forms front side conductive line 32A, and the wire S for extending in the back side of cell piece 31 forms back side conductor wire
32B。
When cell piece 31 is one another in series by wire S, one in adjacent cell piece 31 of wire S reciprocation extensions
Between the front of cell piece 31 and the back side of another cell piece 31, in the case, wire S in a cell piece 31 just
The part extended on face forms the part that front side conductive line 32A, wire S extend on the back side of another adjacent cell piece 31
Form back side conductor wire 32B.In this application, unless expressly stated otherwise, conductor wire 32 can be understood as front side conductive line
32A, back side conductor wire 32B or front side conductive line 32A and back side conductor wire 32B.
Here, term " reciprocation extension " can be understood as wire S extensions " one reciprocal " and form two conductor wires 32, and two
Root conductor wire 32 is formed by an one metal wire S coilings, for example, adjacent two conductor wires form U-shaped structure or V-arrangement knot
Structure, but the application is not limited to this.
According to the battery chip arrays 30 of the embodiment of the present application, multiple conductor wires 32 on cell piece are by reciprocation extension
Wire S is formed, and is connected between adjacent cell piece 31 by conductor wire 32, and therefore, cell piece surface need not print price
Expensive silver main grid, and manufacturing process is simple connects cell piece without using welding, the secondary grid line of wire S and cell piece and
Back electrode it is easy to connect, the cost of cell piece substantially reduces.
In addition, when cell piece 31 is by wire S parallel connections, wire S can with reciprocation extension in two cell pieces just
On face, in the case, wire S forms the front side conductive line 32A of this two cell piece in parallel, and optionally, wire S is past
It extends in again on the front of a cell piece 31 and by another wire S reciprocation extensions on the back side of this cell piece 31, herein
In the case of, the wire S extended on 31 front of cell piece forms front side conductive line 32A, extends in the back side of cell piece 31
Wire S forms back side conductor wire 32B.
According to an embodiment of the invention, the front of cell piece 31 is equipped with secondary grid line 312 and short grid line 33, secondary grid line 312
Including the intermediate secondary grid line 3122 intersected with conductor wire 32 and the edge pair grid line 3121 not intersected with conductor wire 32, short grid line 33
It is connected with edge pair grid line 3121, and short grid line 33 is connected with conductor wire 32 or at least one intermediate secondary grid line 3122.
The application is directed to the solar cell of such conductor wire 32 connection, and short grid line 33 is set on the front of cell piece 31
The precision problem that conductor wire 32 is connect with cell piece 31 is solved, prevents current loss, it is simple for process, it easily realizes, significantly drops
Low process costs.
Wherein, include two parts, a portion pair grid positioned at the secondary grid line 312 of a side surface of battery sheet matrix 311
Line 312 intersects with conductor wire 32, which is located at the centre position of battery sheet matrix 311 and forms intermediate secondary grid
Line 3122, and another part pair grid line 312 does not intersect with conductor wire 32, which is located at battery sheet matrix 311
The edge of side far from conductor wire 32 forms edge pair grid line 3121.
Edge pair grid line 3121 is equipped with the short grid line 33 being connected with conductor wire 32 or at least one intermediate secondary grid line 3122,
In specific embodiment, short grid line 33 is located at the edge portions that conductor wire 32 can not reach cell piece 31 during coiling arrangement,
Can to avoid due to 32 coiling of conductor wire arrange during be unable to reach cell piece 31 edge portions secondary grid line 312 and
Caused by portion of electrical current waste.
Optionally, wire disconnects at the place of turning back that reciprocation extension is formed after wire is connected with cell piece 31.
Preferably, short grid line 33 is connect with the intermediate secondary grid line 3122 nearest apart from edge pair grid line 3121.
In other specific embodiments of the application, short grid line 33 and conductor wire 32 connect.Preferably, short grid line 33
The place's of the turning back connection formed with the wire reciprocation extension on the front of cell piece 31, can increase a solder joint, reduce edge
The possibility that welding position disconnects further enhances the binding force of wire and cell piece.Being connected with the place of turning back herein can
To be interpreted as short grid 33 with the place of turning back there are intersection point, i.e., short grid 33 not terminate at the place of turning back.
According to one embodiment of the application, short grid line 33 is perpendicular to secondary grid line 312.Short grid line 33 preferably with cell piece 31
Light-receiving surface on conductor wire 32 bending part (close to the ends of edge portions) electrical connection, it is highly preferred that corresponding to each
Bending part sets at least one short grid line 33.
Under normal conditions, since the distance between the bending part of conductor wire 32 and the edge of cell piece 31 are shorter
, typically 1-10 millimeters of the length of the short grid line 33, preferably 2.4-7mm.The width of the short grid line 33 can be
0.05-0.5mm, thickness can be 0.01-0.02mm.The radical of short grid line 33 is 3-40 roots, preferably 6-20 roots.
The set-up mode of short grid line 33 can be identical with the secondary grid line 312 on the light-receiving surface of cell piece 31, such as can lead to
It crosses method for printing screen print simultaneously up with secondary grid line 312, is same halftone with the secondary grid line 3121 in front during printing, material
Matter can be silver paste.
Optionally, wire disconnects at the place of turning back after wire is connected with cell piece 31.Wire with battery
Piece 31 disconnects wire at the place of turning back of wire after welding and forms multiple relatively independent conductor wires 32.
In the place of turning back of wire disconnection wire after wire and cell piece 31 weld, make between multiple conductor wires 32
It is relatively independent, the stress between cell piece can be reduced, the peeling force of wire and cell piece binding site is reduced, further improves
The electricity conversions of solar cell chip arrays 30.
Therefore, it is at low cost, photoelectric conversion efficiency is high according to the solar battery sheet component 100 of the embodiment of the present application.
In some specific embodiments of the application, optionally, alloy also contains selected from Cu, In, Ag, Sb, Pb and Zn
At least one of metal.
Preferably, on the basis of the total weight of the alloy, the content of Bi is that the content of 15-60 weight %, Sn are 30-75 weights
Measure %, it be the content of 0-40 weight %, Ag is that the content of 0-3 weight %, Sb is that the content of Cu, which is the content of 0-20 weight %, In,
The content of 0-20 weight %, Pb are that the content of 0-10 weight % and Zn are 0-20 weight %.
Further, alloy can be selected from 50%Sn-48%Bi-1.5%Ag-0.5%Cu, 58%Bi-42%Sn and
At least one of 65%Sn-20%Bi-10%Pb-5%Zn.
It will be appreciated by persons skilled in the art that under the same conditions, Sn-Bi alloys are not allowed compared to Sn-Pb alloys
It is easily aoxidized, i.e. the stability of Sn-Bi alloys is relatively higher, the requirement for water vapor transmittance, and the requirement of Sn-Bi alloys is low
In the requirement of Sn-Pb alloys.Specific to the solar cell of the application, generally use Sn-Pb alloys carry out in this field
Welding, if welded using the relatively higher Sn-Bi alloys of stability, in theory, is used in solar cell
Sn-Pb alloys used backboard when being welded can meet Sn-Bi alloys when being welded using Sn-Bi alloys completely
Anti-oxidant requirement.
However, present inventor has found by long-term experiment and research, in wet condition, Sn-Bi alloys
Oxidation rate is higher than the oxidation rate of Sn-Pb alloys.For this purpose, inventor is to the oxidation rate of Sn-Bi alloys and the water of backboard
Vapour through performance has made intensive studies, and it was found that, when the water vapor transmittance of backboard is more than 0.1mg/m2During/day, Sn-Bi
The oxidation rate of alloy will be accelerated with the increase of water vapor transmittance and drastically, and when the water vapor transmittance of backboard is less than or equal to
0.1mg/m2During/day, with the variation of water vapor transmittance significant changes do not occur for the oxidation rate of Sn-Bi alloys.
And in order to solve the problems, such as that SnBi alloys easily aoxidize, the application is using the closely knit glass of levels and steam insulation
Backboard, and the water vapor transmittance of back veneer material is less than 0.1mg/m2/ day, it is possible to prevente effectively from the oxygen of Sn-Bi alloy materials
Change, can be good at obstructing steam, corrosive gas in environment and enter inside solar energy battery, avoid Sn-Bi alloys and exist
Phenomena such as discoloration, black can occur because of oxidation under the conditions of common encapsulation, solar battery life be influenced, so as to effective protection
Sn-Bi alloys are not in metachromatism, reduce the corrosion of solar cell, are effectively protected solar cell, slow down
Solar cell is decayed, and extends solar battery life.
Specifically, according to a kind of preferred embodiment of the application, secondary grid line 312 is with conductor wire 32 by being located at secondary grid line
On 312 or cladding on the metal filament welding layer welding.Optionally, conductor wire 32 and cell piece 31 secondary grid line 312 and/or
The position that back electrode 314 contacts is provided with welding layer, it is highly preferred that in conductor wire 32 and the secondary grid line 312 and the back of the body of cell piece 31
The position that electrode 314 contacts is both provided with welding layer.Welding layer, which can be applied only, to be overlying on secondary grid line 312 and back electrode 314, also may be used
It is overlying on conductor wire 32 with applying.
In battery chip arrays 30, the thickness and conductor wire 32 of welding layer are (including front side conductive line 32A and back side conductor wire
Diameter ratio 32B) can be 0.02-0.5：1.
In this application, when in conductor wire 32 (including front side conductive line 32A and back side conductor wire 32B) and cell piece 31
When the position that secondary grid line 312 and/or back electrode 314 contact is provided with welding layer, conductor wire 32 can be that this field is conventional not
The wire of clad welded layer, such as copper wire.
In one embodiment, conductor wire 32 (including front side conductive line 32A and back side conductor wire 32B) is coated for surface
There is the wire of low-melting alloy layer.Low-melting alloy layer can be that surface coats completely, can also surface portion cladding.When
When low-melting alloy layer surface part coats, low-melting alloy layer is preferably formed in and the secondary grid line 312 of cell piece 31 and/or the back of the body
At the position that electrode 314 welds.When low-melting alloy layer surface coats completely, low-melting alloy layer can be in the form of cricoid
It is coated on the periphery of wire ontology.The thickness of low-melting alloy layer can select in the larger context.It is low under preferable case
The thickness of melting alloy material is 1-100 microns, more preferably 1-30 microns.The low-melting alloy for forming low-melting alloy layer can be with
For the low-melting alloy of this field routine, fusing point can be 100-220 DEG C.Under preferable case, low-melting alloy Bi-Sn-
Pb alloys, for example, Sn contents be 40 weight %, Bi contents be 55 weight % and Pb contents be 5 weight % alloy (namely
Sn40%-Bi55%-Pb5%).The thickness of low-melting alloy layer can be 0.001-0.06mm.The cross-sectional area of conductor wire 32
Can be 0.01-0.5mm2.Wire ontology can be wire ontology commonly used in the art, such as copper wire.
In battery chip arrays 30, the cell piece 31 of this field routine may be used in cell piece 31, such as can be polycrystalline
Silicon cell 31.Secondary grid line 312 on the light-receiving surface of cell piece 31 can be silver, copper, tin, tin alloy etc..The width of secondary grid line 312
Degree can be 40-80 micron, thickness can be 5-20 micron, secondary grid line 312 can be 50-120 items, and it is adjacent two pair grid lines
312 spacing can be 0.5-3mm.The material of back electrode 314 on the back side of cell piece 31 can be silver, copper, tin, tin alloy
Deng, back electrode 314 is usually band-like, width can be 1-4mm, thickness can be 5-20 microns.
Below with reference to the accompanying drawings solar cell chip arrays 30 according to the application specific embodiment are described.
With reference to figure 1-3 descriptions according to the solar cell chip arrays 30 of one specific embodiment of the application.
In the embodiment shown in Fig. 1-3, show two cell pieces of solar cell chip arrays 30, in other words, show
Two cell pieces 31 being connected with each other by the conductor wire 32 being made of wire S are gone out.
It is understood that cell piece 31 includes battery sheet matrix 311, the pair being located on the front of battery sheet matrix 311
Grid line 312 (i.e. positive pair grid line 312A), the back of the body electric field 313 being located on the back side of battery sheet matrix 311 and is located at and carries on the back electric field 313
On back electrode 314.In this application, it is to be understood that unless expressly stated otherwise, back electrode 314 can be tradition electricity
The back electrode of pond piece, such as printed and formed or similar to the back side of the secondary grid line on cell piece front side of matrix by silver paste
Secondary grid line 312B, or discrete multiple weld parts, in this application, unless expressly stated otherwise, secondary grid line refers to electricity
Secondary grid line 312 on the front of pond sheet matrix 311.
As shown in Figs. 1-3, in this embodiment, (for convenience, solar cell chip arrays include two cell pieces
Referred to herein as the first cell piece 31A, the second cell piece 31B), wire S reciprocation extensions the front of the first cell piece 31A (by
Smooth surface, the upper surface in Fig. 2) between the back side of the second cell piece 31B, wire S constitutes the first cell piece 31A as a result,
Front side conductive line and the second cell piece 31B back side conductor wire, the secondary grid line of wire S and the first cell piece 31A welds
And it is welded with the back electrode of the second cell piece 31B.
In one embodiment of the application, the back side of battery sheet matrix 311 is equipped with back electrode 314, wire and back of the body electricity
Pole 314 is weldingly connected.
That is, in this embodiment, the front of battery sheet matrix 311 is equipped with the secondary grid line 312A in front, the cell piece
The back side of matrix 311 is equipped with back electrode 314, when conductor wire 32 is located at the front of battery sheet matrix 311, conductor wire 32 and front pair
Grid line 312A is weldingly connected, when conductor wire 32 is located at the back side of battery sheet matrix 311, then with the back of the body of the battery sheet matrix 311
The back electrode 314 in face is weldingly connected.
In some embodiments, wire reciprocation extension 10-60 between the first cell piece 31A and the second cell piece 31B
It is secondary, it is preferable that as shown in Figure 1, wire reciprocation extension 12 times is to form 24 conductor wires, and wire is single, changes speech
It, 24 conductor wires of formation of single metal wire reciprocation extension 12 times, the spacing between adjacent conductive line can be 2.5 millimeter -15
Millimeter.According to this embodiment, compared with the conductor wire of conventional batteries piece, quantity increase, so as to reduce electric current from secondary grid line to
The distance of conductor wire, reduces resistance, improves electricity conversion.In the embodiment shown in fig. 1, adjacent conductive line is formed
U-shaped structure, thus convenient for the coiling of wire.Optionally, the application is not limited to this, for example, adjacent conductive line can also shape
Forming V-shape structure.
It is highly preferred that as shown in figure 4, wire S includes the welding layer 322 that wire ontology 321 and its outer surface coat,
Wire is welded by the welding layer 322 of cladding and secondary grid line and/or back electrode, as a result, convenient for wire and secondary grid line and/or
The electrical connection of back electrode avoids wire in connection procedure from drifting about and influence photoelectric conversion efficiency.Certainly, wire and cell piece
Electrical connection can be carried out in the lamination process of solar cell module, can also carry out before being laminated, it is preferable that in layer
It is attached before pressure.
Wherein it should be noted that in this application, wire S refers to that reciprocation extension forms conductor wire on cell piece 31
32 wire, conductor wire 32 can include the welding layer 322 of 321 external sheath of wire ontology 321 and wire ontology, i.e.,
Wire S can also be included wire ontology 321 and be coated on the welding layer 322 of 321 outer layer of wire ontology, in this Shen
In embodiment please, if without specified otherwise, wire refers to the wire of the reciprocation extension formation conductor wire 32 on cell piece 31
S。
In some embodiments it may be preferred that wire ontology 321 is copper wire, certainly, wire S may be copper wire, i.e.,
Wire S not clad welded layers 322, but the application is not limited to this, such as wire ontology 321 or aluminium wire.It is preferred that
Ground, wire S have circular cross section, and more sunlights can be irradiated on battery sheet matrix as a result, further improve light
Photoelectric transformation efficiency.
In some embodiments it may be preferred that before wire is contacted with cell piece, wire prolongs in a tensioned state
It stretches, i.e., stretches wire, after the secondary grid line and back electrode with cell piece are connect, the tensile force of wire can be discharged,
Thus the conductor wire when preparing solar cell module is further avoided to drift about and influence photoelectric conversion efficiency.
Fig. 5 shows the schematic diagram of the battery chip arrays of another embodiment according to the application.As shown in figure 5, wire
Reciprocation extension is between the front of the first cell piece 31A and the front of the second cell piece 31B, and wire forms the first electricity as a result,
The front side conductive line of the front side conductive line of pond piece 31A and the second cell piece 31B, in the case, the first cell piece 31A and second
Cell piece 31B is connected in parallel to each other, it is, of course, understood that preferably, the back electrode and the second cell piece of the first cell piece 31A
The back electrode of 31B can also be connected by the back side conductor wire that another wire reciprocation extension is formed, optionally, the first cell piece
The back electrode of the back electrode of 31A and the second cell piece 31B can also be connected by traditional mode.
Below with reference to Fig. 6 descriptions according to the solar cell chip arrays 30 of another embodiment of the application.
Include n × m cell piece 31, in other words, Duo Ge electricity according to the solar cell chip arrays 30 of the embodiment of the present application
Pond piece 31 is arranged into the matrix form of n × m, and wherein n is columns, and m is number of rows.More specifically, in this embodiment, 36 batteries
Piece 31 is arranged in 6 row and 6 rows, i.e. n=m=6.It is understood that the application is not limited to this, for example, number of rows and columns can
With unequal.For convenience, in figure 6, along direction from left to right, the cell piece 31 in same row's cell piece 31 is successively
The cell piece 31 of referred to as first, second, third, fourth, the 5th and the 6th, along direction from the top down, the row of cell piece 31 is successively
The row's cell piece 31 of referred to as first, second, third, fourth, the 5th and the 6th.
In same row's cell piece 31, wire reciprocation extension is on the surface of a cell piece 31 and another adjacent battery
Between the surface of piece 31, in adjacent two rows of cell pieces 31, a cell piece 31 of the wire reciprocation extension in a rows
Between surface and the surface of a cell piece 31 in a+1 rows, and m-1 >=a >=1.
As shown in fig. 6, in specific example, in same row's cell piece 31, wire reciprocation extension is in a battery
Piece 31 it is positive between the back side of another adjacent cell piece 31, the cell piece 31 in same row is one another in series as a result,.
In adjacent two rows of cell pieces 31, wire reciprocation extension is in the front and position of the cell piece 31 positioned at the end that a is arranged
Between the back side of a cell piece 31 of the end of a+1 rows, thus adjacent two rows of cell pieces 31 are one another in series.
It is highly preferred that in adjacent two rows of cell pieces 31, wire reciprocation extension is in the electricity positioned at the end that a is arranged
Between the surface of pond piece 31 and the surface of cell piece 31 positioned at the end of a+1 rows, an end and the a+ of a rows
The end of 1 row is located at the same side of matrix, such as in figure 6, positioned at the right side of matrix.
More specifically, in the embodiment shown in fig. 6, in the first row, first battery of one metal wire reciprocation extension
Between the back side between the front of piece 31 and the second cell piece 31, the front of second the second cell piece of one metal wire reciprocation extension 31
Between the back side between third cell piece 31, front and the 4th battery of third one metal wire reciprocation extension third cell piece 31
Between the back side between piece 31, between the front of the 4th cell piece 31 of the 4th one metal wire reciprocation extension and the 5th cell piece 31
Between the back side, between the back side between the front of the 5th cell piece 31 of the 5th one metal wire reciprocation extension and the 6th cell piece 31,
The adjacent cell piece 31 in first row is one another in series by corresponding wire as a result,.
The front of the 6th cell piece 31 in six roots of sensation wire reciprocation extension first row and the in adjacent second row
Between the back side between six cell pieces 31, first row and second row are one another in series as a result, the 7th one metal wire reciprocation extension second
Between the back side in the front of the 6th cell piece 31 in row and second row between the 5th cell piece 31, the 8th one metal wire is reciprocal
Between the back side in the front of the 5th cell piece 31 in extension second row and second row between the 4th cell piece 31, until the tenth
The back of the body in the front of the second cell piece 31 in one one metal wire reciprocation extension second row and second row between the first cell piece 31
Between face, then, first in the positive row with third of the first cell piece 31 in the 12nd one metal wire reciprocation extension second row
Between the back side between cell piece 31, thus second row is one another in series with third row.Then, third row and the 4th row are gone here and there successively
Connection, the 4th row connect with the 5th row, and the 5th row connects with the 6th row, thus complete the preparation of battery chip arrays 30, implement herein
Example in, the left side of the first cell piece 31 of first row and the left side of the first cell piece 31 of the 6th row setting busbar, one
The conductor wire that busbar connection is extended from the left side of the first cell piece 31 of first row, another busbar connection is from the 6th row's
The conductor wire that the left side of first cell piece 31 is extended.
As shown in the figure and above-mentioned, connection between the cell piece of the embodiment of the present application is connected using conductor wire, first row, the
Series connection is realized using conductor wire between two rows, third row, the 4th row, the 5th row and the 6th row, as shown in the figure, optionally,
Can between second row and third row, it is in parallel for preventing the diode of spottiness, two poles between the 4th row and the 5th row
The connection of pipe may be used that well known to a person skilled in the art technologies, such as busbar.
However, the application is not limited to this, for example, can connect between first row and second row, third row and the 4th row
Series connection, the 5th row and the 6th row series connection, while second row and third row are in parallel, the 4th row and the 5th row are in parallel, in the case,
It can be set in the left or right side of respective row and busbar is set respectively.
Optionally, the cell piece 31 in same row can be in parallel, for example, an one metal wire is from the first battery in first row
The front that the front reciprocation extension of piece 31 passes through the second to the 6th cell piece 31.
According to one embodiment of the application, the width of secondary grid line 312 is 40-80 microns, and thickness is 5-20 microns, secondary grid
Line is 50-120 items, and the spacing of adjacent pair grid line is 0.5-3mm.The secondary grid line 312 of the structure can be preferably with leading as a result,
Electric wire 32 is welded, and improves photoelectric conversion efficiency.
Preferably, front adhesive film 20 and back side adhesive film 40 are silica gel, are existed relative to traditional its advantage of EVA encapsulating films
In the ultraviolet light that is absorbed by EVA ultraviolet absorbers can be penetrated, electric energy is converted to, increases the output of photovoltaic module；Second point
It is that novel encapsulating film is very stable under ultraviolet light, the small molecules such as non-degradable generation acetic acid, corrosion cell piece, weatherability
More preferably.In addition, 0.1mg/m is less than or equal to using water vapor transmittance2The steam insulating back panel of/day, and the secondary grid on cell piece
Line is weldingly connected with conductor wire by the welding layer containing Sn and the alloy of Bi, can effectively improve the company of conductor wire and cell piece
Effect is connect, ensures photoelectric conversion efficiency.
The silica gel used in current silica gel membrane module is a kind of thermoplastic membrane structure, is solid-state under room temperature, temperature
Gradually soften after raising.And transparent liquid silica gel is a kind of two-component silica gel, two components are with 1：1 uniformly mix after 70~
130 DEG C of laminateds can be solidified into heat cured transparent silica gel, and laminating temperature is low, save the energy, and help to extend and be laminated
The machine service life.The upper glass plates 10 and backboard of the solar cell module of the present invention are all rigid glass, than high molecular material
Normal back plate is more convenient for gluing and lamination.Temperature is likely to be breached 80~100 DEG C to component in actual use, at such a temperature, heat
The film of plasticity can soften, and have certain mobility, and thermosetting property film does not have this problem, component heat resistance higher.
As shown in Figure 10, further, the inside of steam insulating back panel 50 is coated with the reflecting coating 51 of white.The application exists
The reflecting coating 51 of white is coated on the inside of steam insulating back panel, the light that can will transmit through 31 gap of cell piece is reflected back and subtracted
Few encapsulation loss.
The application uses glass or metallic plate compared with conventional macromolecule backboard, to have excellent corrosion resistant as backboard
Corrosion energy, weatherability and wearability, by internal electronic component with external environment is completely isolated comes, extension assembly life-span.
In a preferred embodiment, fourth is clamped between the outer of upper glass plates 10 and the outer of steam insulating back panel 50
The fluid sealant of base rubber or Oppanol seals.
The application uses the butyl rubber or polyisobutene that water vapor transmittance is extremely low between layer glass on the inside of most outer
Rubber compensates for original photovoltaic module edge and encapsulating material is exposed to outer deficiency, can with reference to the closely knit glass of levels
The steam in barrier environment, corrosive gas enter component internal well, slow down component attenuation, extend assembly life-span.
It is further preferred that upper glass plates 10 and 50 outer of steam insulating back panel plate utilize silica gel or fourth by U-frame 60
Base rubber or double faced adhesive tape are fixed, and filled with close between the outer and U-frame 60 of upper glass plates 10 and steam insulating back panel 50
Sealing.
The application is fixed U-shaped frame using silica gel or butyl rubber or double faced adhesive tape in the outer of layer glass, side
Frame material is aluminium or high molecular material.The component of this structure fragmentation, safety due to the easy stress in the corner of tempered glass
Relatively low, risk is larger when transporting and installing.After U-shaped rigid border protection, the edge of solar double-glass assemblies and the crashworthiness of quadrangle
The ability of hitting, which has, to be greatly improved, and further enhances the sealing effect of component.
As shown in figure 13, according to the solar cell module of the embodiment of the present application, terminal box 70 is further included, terminal box 70 is set
In upper glass plates 10 and the edge of steam insulating back panel 50.
In the application, terminal box 70 is mounted on the edge of solar cell module rather than is carried on the back in solar cell module
Face trepanning or fluting maintain the complete structure of back glass, will not form stress concentration point, safety higher.In addition, wiring
This distribution of box 70 can reduce the length of busbar and External cable inside solar cell module relative to traditional components,
Cost is saved, and reduce resistance to increase power output.
It, can first will be on conductor wire 32 and cell piece in the preparation process of the solar cell module provided in the application
Secondary grid line 312 and back electrode welding, each layer then be laid out and be laminated.
The specific embodiment of the present invention, solar cell module 100 include upper cover plate 10, front adhesive film 20, electricity
Pond chip arrays 30, back side adhesive film 40 and steam insulating back panel 50.Battery chip arrays 30 include multiple cell pieces 31, adjacent cell
It is connected between piece 31 by more conductor wires 32, wire of the conductor wire 32 by reciprocation extension between the surface of adjacent cell piece
S is formed, and conductor wire 32 is welded with secondary grid line, and front adhesive film 20 is in direct contact with conductor wire 32 and is filled in adjacent conductor wire
Between 32.
In other words, included being sequentially stacked upper cover along the vertical direction according to the solar cell module of the embodiment of the present application 100
Plate 10, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50, battery chip arrays 30 include multiple batteries
Piece 31 and more conductor wires 32 for connecting multiple cell pieces 31, conductor wire 32 are made of wire S, and wire S reciprocation extensions exist
On the surface of two adjacent cell pieces 31.
Conductor wire 32 is electrically connected with cell piece 31, wherein, front adhesive film 20 and conductor wire 32 on cell piece 31
It is in direct contact and is filled between adjacent conductor wire 32, front adhesive film 20 can both play the work of fixed conductor wire 32
With, and conductor wire 32 and outside air and steam can be completely cut off, so as to which conductor wire 32 be avoided to be aoxidized, it ensure that opto-electronic conversion
Efficiency.
As a result, according to the solar cell module of the embodiment of the present application 100, by being made of the wire S of reciprocation extension
Conductor wire 32 replace conventional batteries piece main gate line and welding, reduce cost；The wire S of reciprocation extension reduces metal
The number of the free end of silk S, required space is small when setting wire S, is not limited by a space, is made of wire S reciprocation extensions
The radical of conductor wire 32 can greatly improve, prepare simple, can produce in batches；Front adhesive film 20 is direct with conductor wire 32
It contacts and is filled between adjacent conductor wire 32, can be avoided effectively by the isolations such as conductor wire 32 and outside air, steam
Electricity conversion can be effectively ensured in the oxidation of conductor wire 32.
In some specific embodiments of the application, a cell pieces 31 of the wire S in adjacent cell piece 31
Reciprocation extension, front adhesive film 20 and leading on the front of a cell piece 31 between front and the back side of another cell piece 31
Electric wire 32 is in direct contact and is filled between the adjacent conductive line 32 on the front of a cell piece 31, back side adhesive film 40 with it is another
The conductor wire 32 at the back side of one cell piece 31 is in direct contact and is filled in the adjacent conductive line at the back side of another cell piece 31
Between 32.
That is, in this application, adjacent two cell pieces 31 are connected by wire S, and adjacent two
In a cell piece 31, the front of a cell piece 31 is connected with wire S, the back side and the wire S phases of another cell piece 31
Even.
Wherein, the front adhesive film 20 and the 31 positive gold of cell piece on cell piece 31 that front is connected with wire S
Belong to silk S to be in direct contact and be filled between adjacent conductor wire 32, the back side glue for the cell piece 31 that the back side is connected with wire S
The wire S at film layer 40 and 31 back side of cell piece is in direct contact and is filled between adjacent conductor wire 32 (such as Fig. 2 institutes
Show).
As a result, according to the solar cell module of the embodiment of the present application 100, not only front adhesive film 20 can will be a part of
Positive conductor wire 32 and the external world of cell piece 31 separate, and back side adhesive film 40 can also leading the back side of percentage of batteries piece 31
Electric wire 32 is separated with the external world, may further ensure that the photoelectric conversion efficiency of solar cell module 100.
In some specific embodiments of the application, the size for conventional cell piece is 156mm × 156mm；Too
It is positive can the series resistance of battery component be 380-440 milliohm/60 piece, while the application is not limited to 60, can be 30,
72 etc., the series resistance of solar cell module is 456-528 milliohms when being 72, the excellent electrical property of battery.
In some specific embodiments of the application, the size for conventional cell piece is 156mm × 156mm；Too
It is positive can the open-circuit voltage of battery component be 37.5-38.5V/60 pieces, similary the application is not limited to 60, can be 30,
72 etc..Short circuit current is 8.9-9.4A, and short circuit current is unrelated with the number of cell piece.
In some specific embodiments of the application, the fill factor of solar cell module is 0.79-0.82, no
It is influenced by the size and number of cell piece, influences the electrical property of battery.
In some specific embodiments of the application, the size for conventional cell piece is 156mm × 156mm；Too
It is positive can the operating voltage of battery component be 31.5-32V/60 pieces, similary the application is not limited to 60, can be 30,72
Piece etc..Operating current is 8.4-8.6A, and operating current is unrelated with the number of cell piece.
In some specific embodiments of the application, the size for conventional cell piece is 156mm × 156mm；Too
The transfer efficiency of positive energy battery component is 16.5-17.4%.Power is 265-280W/60 pieces.
The preparation method of the solar cell module according to the embodiment of the present application is detailed below.
Specifically, included the following steps according to the preparation method of the solar cell module of the embodiment of the present application：
By upper glass plates 10, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and steam insulating back panel 50 according to
It is secondary to stack, and the front of cell piece 31 is made to face front adhesive film 20, the back side of cell piece 31 is in face of back side adhesive film, Ran Houjin
Row lamination obtains solar cell module 100, and wherein solar cell chip arrays 30 include multiple cell pieces 31 and conductor wire 32,
It is connected between adjacent cell piece by the conductor wire, the front of cell piece 31 has secondary grid line 312, and conductor wire 32 passes through welding
Layer is welded with secondary grid line 312, and welding layer contains alloy, and alloy contains Sn and Bi.
Front adhesive film 20 and back side adhesive film 40 can be adhesive film commonly used in the art, it is preferable that front glue
Film layer 20 and back side adhesive film 40 are thermosetting property silica gel.In this application, thermosetting property silica gel may be used commonly used in the art
Product or be prepared according to method well known to those skilled in the art.
Included preparing battery chip arrays first according to the preparation method of the solar cell module 100 of the embodiment of the present application
30, then it is sequentially stacked upper cover plate 10, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and steam insulating back panel
50, it is finally laminated to obtain solar cell module 100.It is understood that the preparation of solar cell module 100 is also wrapped
Other steps are included, such as seals the space between upper cover plate 10 and steam insulating back panel 50 with fluid sealant and utilizes U-frame will
Said elements tighten together, this it is known to those skilled in the art that, be not detailed herein.
Specifically, solar cell chip arrays 30 preparation include by wire reciprocation extension the surface of cell piece 31 it
Between and with the surface of the cell piece 31 be electrically connected to form more conductor wires, thus adjacent cell piece 31 passes through described more
Conductor wire connects and forms battery chip arrays 30.
Specifically, as shown in fig. 7, in a tensioned state, by an one metal wire reciprocation extension 12 times.Then, such as Fig. 8 institutes
Show, prepare the first cell piece 31A and the second cell piece 31B.Next, as shown in figure 9, by the first cell piece 31A front with
Wire is connected and the back side of the second cell piece 31B is connected with wire, and battery chip arrays 30 are consequently formed, are shown in Fig. 9
Two cell pieces 31 as described above, when battery chip arrays 30 have multiple cell pieces 31, utilize the wire of reciprocation extension
The front of one cell piece 31 is connected with the back side of another adjacent cell piece 31, i.e., by the secondary grid line of a cell piece 31
It is connected with the back electrode of another cell piece 31 with wire.Wire is pressed from both sides by being located at two of this two end of root silk respectively
The lower reciprocation extension of son tensioning.
In the embodiment shown in fig. 9, adjacent cell piece is one another in series, as described above, as needed, adjacent cell piece can
To be connected in parallel to each other by wire.
By the battery chip arrays 30 being prepared and upper cover plate 10, front adhesive film 20, back side adhesive film 40 and lower glass
Or metallic plate 50 is sequentially stacked, and makes the front of the cell piece 31 in face of the front adhesive film 20, the cell piece 31
The back side faces back side adhesive film 40, is then laminated to obtain solar cell module 100.It is understood that wire with
Cell piece 31 welds, and the connection of wire and cell piece 31 can carry out in lamination process, it is of course also possible to first connect, after
Lamination.
Wherein, according to the solar cell module of the embodiment of the present application in the preparation, wire is past in a tensioned state
Extend again, and wire reciprocation extension is between the front of cell piece 31 and the back side of another cell piece 31.It leads
Electric wire 32 include the front side conductive line 32A that is connected with the secondary grid line on the front of a cell piece 31 and with cell piece 31
The back side conductor wire 32B that back electrode on the back side is connected.Wire reciprocation extension 10-60 times, between adjacent two conductor wires
Spacing is 2.5-15mm, and adjacent two conductor wires form U-shaped structure or v-shaped structure.
Optionally, wire is one, and cell piece 31 is arranged into the matrix form of n × m, and wherein n is columns, and m is number of rows,
In same row's cell piece 31, make wire reciprocation extension on the surface of a cell piece 31 and another adjacent cell piece 31
Between surface, in adjacent two rows of cell pieces 31, make the surface of a cell piece 31 of the wire reciprocation extension in a rows
Between the surface of a cell piece 31 in being arranged a+1, wherein m-1 >=a >=1.
Preferably, in adjacent two rows of cell pieces 31, make wire reciprocation extension in the electricity positioned at the end that a is arranged
Between the surface of pond piece 31 and the surface of cell piece 31 positioned at the end of a+1 rows, an end and the a+ of a rows
The end of 1 row is located at the same side of matrix.
Further, in same row's cell piece 31, make wire reciprocation extension in the front of a cell piece 31 and phase
Between the back side of another adjacent cell piece 31, in adjacent two rows of cell pieces 31, make wire reciprocation extension positioned at a
Row an end cell piece 31 front and positioned at a+1 row end a cell piece 31 the back side between, with string
Join adjacent two rows of cell pieces 31.
In some specific embodiments of the application, metal of the reciprocation extension between the adjacent cell piece 31 of same row
Silk is one, and wire of the reciprocation extension between the cell piece 31 of adjacent row is one.Wire is copper wire, and metal
Silk has circular cross section.
In other words, following two steps are included according to the preparation method of the solar cell module of the embodiment of the present application：
(1) at least two cell pieces are arranged with a matrix type, and between two adjacent cell pieces 31, makes conduction
Reciprocation extension is to form collapsed shape between the surface of cell piece 31 and the surface of another cell piece 31 for line, and by one
Secondary grid line and conductive wire bonding on the light-receiving surface of a cell piece 31, by the back electrode on the back side of another cell piece 31 with leading
Wire welding；
(2) battery chip arrays 30,40 and of back side adhesive film obtained upper glass plates 10, front adhesive film 20, step (1)
Steam insulating back panel 50 stacks successively from top to bottom, and the light-receiving surface of cell piece 31 is made to make cell piece in face of front adhesive film 20
31 back side faces back side adhesive film 40, is then laminated.
In step (1), it is preferable that between neighbouring two rows of cell pieces 31, make conductor wire from an electricity in a rows
The surface of pond piece 31 extends to the surface of a cell piece 31 in a+1 rows；It is highly preferred that make conductor wire from a rows
The surface of the cell piece 31 of one end extends to the surface of the cell piece 31 of an end in a+1 rows.
In one embodiment, it is further preferred that in same row's cell piece 31, make conductor wire from a cell piece
31 light-receiving surface bending extends to the back side of another adjacent cell piece 31；Between neighbouring two rows of cell pieces 31, make conduction
31 light-receiving surface of cell piece of line from an end in a rows extends to the back of the body of the cell piece 31 of the adjacent end in a+1 rows
Face.
In another embodiment, it is further preferred that in same row's cell piece 31, make conductor wire from a battery
The back side bending of piece 31 extends to the light-receiving surface of another adjacent cell piece 31；Between neighbouring two rows of cell pieces 31, make to lead
Electric wire from a row in an end 31 back side of cell piece extend to a+1 row in adjacent end cell piece 31 by
Smooth surface.
In step (1), arrange between same row's cell piece 31 and/or conductor wire is in adjacent two rows by coiling for conductor wire
Coiling is arranged between cell piece 31.Most preferably, conductor wire between same row's cell piece 31 and adjacent two rows of cell pieces 31 it
Between using coiling arrangement by the way of.
In the preparation method of above-mentioned solar cell module, conductor wire, secondary grid line, wire, low-melting alloy layer, glue
Film layer, upper glass plates and steam insulating back panel etc. are identical with what is be described above.
Above-mentioned lamination process can carry out in laminating machine.The lamination process implemented in laminating machine generally includes low temperature pumping
Two stages of vacuum and hot pressing.
In the preparation method of above-mentioned solar cell module, the welding manner that this field routine may be used in welding is real
It applies.Under preferable case, the mode of welding is contactless, wherein, non-contact welding method refers to high-frequency welding or far infrared
Welding.The welding of multiple-grid cable architecture cell piece 31 can be realized using contactless welding method, rosin joint can be avoided the occurrence of,
And it can prevent conductor wire from drifting about.
In some specific embodiments of the application, by upper glass plates 10, front adhesive film 20, battery chip arrays 30,
After back side adhesive film 40 and steam insulating back panel 50 stack lamination assembling successively, bond and install at the back side of steam insulating back panel 50
Block 80, mounting blocks 80 are fixed on stent.
In the application, the mounting means of solar cell module be different from traditional components frame installation or solar double-glass assemblies compared with
The universal clamp-type to edge is installed, and, using four pieces of mounting blocks of high strength bond glue sticking, will be pacified using at the back side of component
Dress block is fixed by screws on stent.The installation of this mode ensures being more uniformly stressed for component, enhances component and bears
The ability of load, more securely and reliably.
In the application, the connection mode of battery chip arrays 30 is different from general components, using single plating low-melting alloy
Thin copper wire connects two panels dereliction grid cell piece, it can be understood as plates the thin copper wire of low-melting alloy instead of conventional crystalline silicon cell piece
On main grid and welding, while eliminate the busbar of one end of no lead-out wire.Low-melting alloy will be plated in order to facilitate us
Thin copper wire is known as conductor wire.This cell piece retains traditional first step front wire mark, and the grid line of bottom is made on battery, I
Still follow tradition and be called thin grid.Wire is then bent by a plurality of conductor wire perpendicular to thin grid by different methods
It is covered on thin grid, forms the conductive grid structure of intersection.Compared with traditional three main grid technologies, since the section of copper wire is circle
Shape can be reduced effective shading-area, while reduce ohmic loss after component is made, and improve component general power.Due to 20-30
The distribution of main grid is more dense, and there are many contact between conductor wire and thin grid, on the hidden road conducted with fine fisssure position electric current split of silicon chip
Diameter more optimizes, therefore since loss caused by fine fisssure is greatly reduced.What is more important uses copper due to conductive wiring material
Line, the ag material dosage of battery will also greatly reduce.
Example 1
Example 1 is used for the example for illustrating the solar cell module 100 of the application and preparation method thereof.
(1) conductor wire is prepared
Adhere to one layer of 50%Sn-48%Bi-1.5%Ag-0.5%Cu alloy-layers (fusing point 160 on the surface of copper wire
DEG C), wherein, the cross-sectional area of copper wire is 0.04mm2, the thickness of alloy-layer is 16 microns, so as to which conductor wire be made.
(2) solar cell module 100 is prepared
The POE adhesive films (melt temperature is 65 DEG C) that size is 1630 × 980 × 0.5mm are provided, and ruler is correspondingly provided
It is very little be 1633 × 985 × 3mm glass plate and 60 chip sizes be 156 × 156 × 0.21mm polycrystalline silicon battery plate 31.Cell piece
31 have 91 secondary grid lines (material is silver, and width is 60 microns, and thickness is 9 microns), and every secondary grid line is substantially in the longitudinal direction
Through cell piece 31, and the distance between adjacent pair grid line is 1.7mm, and the back side of cell piece 31 has 5 back electrodes, and (material is
Tin, width are 1.5 millimeters, and thickness is 10 microns), every back electrode substantially runs through cell piece 31, and adjacent two in the longitudinal direction
The distance between back electrode is 31mm.
60 cell pieces 31 are arranged with a matrix type (6 rows 10 arrange), two adjacent cell pieces 31 in same row
Between, make state of the one metal wire in tension between the front of cell piece 31 and the back side of another cell piece reciprocal
Extension, such as two charge ofves is set to follow closely, the pin in each row is spaced, wire between two charge ofves nail in a tensioned state
Reciprocation extension, wire is by the lower reciprocation extension of the two clips tensioning for being located at this two end of root silk respectively, so as to form 15
The parallel conductor wire of item, and by the secondary grid line of a cell piece 31 and conductive wire bonding, by the back electrode of another cell piece 31
With conductive wire bonding, welding temperature is 180 DEG C, and the distance between adjacent conductive line being mutually parallel is 9.9mm, thus by 10
The series connection of piece cell piece is in a row, and such battery strings of 6 rows are connected into array by busbar.By upper glass plates 10, lower glass
Glass plate (water vapor transmittance 0mg/mm2* day) towards the one side of cell piece 31 silica gel is respectively coated, it is sticked in the surrounding of silica gel
Butyl rubber sealant item.Then, by upper glass plates, in the matrix form arrangement and with multiple cell pieces of welded wire and under
Glass plate stacks successively from top to bottom, wherein, make the light-receiving surface of cell piece 31 in face of front adhesive film 20, front adhesive film 20 with
Conductor wire 32 is in direct contact, and the back side of cell piece 31 is made to be subsequently placed into laminating machine and be laminated, just in face of back side adhesive film 40
Face adhesive film 20 is filled between adjacent conductor wire 32, so as to which solar cell module be made.
Example 2
Example 2 and example 1 difference lies in：
Cell piece 31 is arranged with a matrix type, and between two adjacent cell pieces 31, using as shown in figure 14
Wire drawing mode, 15 wires parallel to each other by the clip of every one metal wire end are tensioned, cell piece is flattened, is pressed from both sides
The tension of son is 2N, and positive secondary grid line of this each of 15 wire parallel to each other individually with a cell piece 31 is welded
It connects, and is welded, and the distance between adjacent conductive line being mutually parallel is with the back electrode at the back side of another cell piece
9.9mm.So as to which solar cell module be made.
Comparative examples 1
Comparative examples 1 and example 1 difference lies in：Cell piece is arranged with a matrix type, 15 are cascaded
Wire paste in transparent adhesive tape film layer, wire is pasted in solar cell on piece, between two adjacent cell pieces,
Wire connect cell piece front and another cell piece the back side then, by upper glass plates, upper POE adhesive films, thoroughly
Gelatin film layer, in the matrix form arrange and be connected with wire multiple cell pieces, transparent adhesive tape film layer, lower POE adhesive films and under
Glass plate stacks successively from top to bottom, so as to which solar cell module be made.
Comparative examples 2
Comparative examples 2 and example 1 difference lies in：Backboard does not use glass using PET sheet, and solar-electricity is so made
Pond component.
Example 3
Solar cell module is prepared according to the method for example 1, with example 1 difference lies in：Reciprocation extension is to form 20
The parallel conductor wire of item, and the distance between adjacent conductive line being mutually parallel is 7mm.So obtained solar cell module.
Example 4
Solar cell module is prepared according to the method for example 1, with example 1 difference lies in：Alloy-layer is Sn40%-
Bi55%-Pb5% (fusing point is 125 DEG C).So obtained solar cell module.
Example 5
Solar cell module is prepared according to the method for example 1, with example 1 difference lies in：Alloy-layer is 58%Bi-
42%Sn.So obtained solar cell module.
Example 6
Solar cell module is prepared according to the method for example 1, with example 1 difference lies in：Alloy-layer is 65%Sn-
20%Bi-10%Pb-5%Zn.So obtained solar cell module.
Example 7
Solar cell module is prepared according to the method for example 3, with example 3 difference lies in：The connection side of array
Formula is：Between adjacent two rows of cell pieces, the light-receiving surface of conductor wire from the cell piece of an end in a (a >=1) rows prolongs
Stretch out simultaneously with a+1 arrange in adjacent end portion cell piece 31 the back side formed be electrically connected, be used to implement it is adjacent two rows cell piece it
Between connection, and for connecting the conductor wire of adjacent two rows of cell piece 31 with being used to connect leading for adjacent cell piece 31 in this two rows
Electric wire is mutually perpendicular to arrange.So obtained solar cell module.
Example 8
Solar cell module is prepared using the method identical with example 1, the difference is that backboard is that water vapor transmittance is
0mg/mm2* the aluminium backboard of day
Example 9
Solar cell module is prepared using the method identical with example 1, the difference is that backboard is that water vapor transmittance is
0mg/mm2* the semi-tempered glass of the 2.5mm thickness of day
Example 10
Solar cell module is prepared using the method identical with example 1, the difference is that backboard clamps between bilayer TPT
It is 0.1mg/mm to have water vapor transmittance2* the backboard of the PIB rubber layers of day.
Example 11
Solar cell module is prepared using the method identical with example 1, the difference is that backboard presss from both sides between being double-deck TPT
Hold water vapor transmittance for 0.01mg/mm2* the backboard of the PIB rubber layers of day.
Comparative examples 3
Solar cell module is prepared using the method identical with example 1, the difference is that backboard is that water vapor transmittance is
2270mg/mm2* the TPT backboards of day.
Comparative examples 4
Solar cell module is prepared using the method identical with example 1, the difference is that backboard is that water vapor transmittance is
2400mg/mm2* the PYE backboards of day.
Performance test
Hydrothermal aging (high temperature and humidity)：It is tested in (85 DEG C/85%RH) high temperature and humidity test case；
Test object：According to the solar cell module that above-described embodiment and comparative example obtain, hydrothermal aging (85 DEG C/
85%RH) test result is shown in Table 1.
Table 1
Wherein, OK is represented：No bad order (such as welding wire blacks, delamination), DH1000h power attenuations are less than 2%,
DH2000h power attenuations are less than 5%.
Welding wire blacks, and refers to the weld strength of welding wire and cell piece and reduces, easily causes faulty soldered joint, influence the safety of component
Energy and electrical property.
Performance test
PCT (accelerated hydrothermal aging)：It is tested in (110 DEG C/100%RH/1.5atm) accelerated hydrothermal aging chamber；
Test object：The small sample identical with above-mentioned solar cell module packaged type.PCT (accelerated hydrothermal aging)
(110 DEG C/100%RH/1.5atm) test result is shown in Table 2.
Table 2
Wherein, OK is represented：Without bad order, PCT50h power attenuations are less than 2%, PCT100h power attenuations and are less than 5%.
Test case 1
(1) whether the wire observed in solar cell module by naked-eye observation method drifts about；
(2) method according to disclosed in IEC904-1 is prepared above-mentioned example and comparative examples using single flash operation simulator
Solar cell module is tested, and test condition is standard test condition (STC)：Light intensity is 1000W/m2；Spectrum is
AM1.5；Temperature is 25 DEG C, records the photoelectric conversion efficiency of each cell piece.
As a result it is as shown in table 3 below.
Table 3
Wherein, the maximum power point power and maximum during theoretically zero internal resistance that fill factor represents solar cell module
The ratio of power (i.e. open-circuit voltage * short circuit currents), characterizes close degree of the actual power to theoretical maximum power, which gets over
Greatly, illustrate that photoelectric conversion efficiency is higher, general series resistance is small, and fill factor is with regard to big；Photoelectric conversion efficiency is that finger assembly is being marked
(light intensity 1000W/m under the conditions of quasi-optical photograph2), component converts light energy into the ratio of electric energy；Series resistance is equivalent to solar energy group
The internal resistance of part, value is bigger, and assembly property is poorer；Fill factor represents the practical maximum power of component and theoretical maximum power
Ratio, numerical value is bigger, and assembly property is better；Open-circuit voltage be component under standard illumination condition, voltage during open circuit；Short circuit
Component is under standard illumination condition during electric current, electric current when short-circuit；Operating voltage be component under standard illumination condition, with maximum
Output voltage when power works；Operating current be component under standard illumination condition, output when being worked with maximum power electricity
Stream；Power be finger assembly under standard illumination condition, the attainable maximum power of institute.
Wire drift will not occur for the solar cell module of the embodiment of the present application it can be seen from the result of table 3
Problem, and relatively high photoelectric conversion efficiency can be obtained, while place observation some months wire and do not change colour.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instructions such as needle ", " counterclockwise " are based on orientation shown in the drawings or position relationship, are for only for ease of
The description present invention and simplified description rather than instruction imply that signified device or element must be with specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can be machine
Tool is connected or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature it " on " or it " under "
It can be in direct contact including the first and second features, it is not to be in direct contact but pass through it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " including first spy
Sign is right over second feature and oblique upper or is merely representative of fisrt feature level height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " right over second feature and oblique upper or be merely representative of including fisrt feature
Fisrt feature level height is less than second feature.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
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 of the present invention or example.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in combine in an appropriate manner.
Although the embodiments of the present invention has 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, those of ordinary skill in the art are not departing from the principle of the present invention and objective
In the case of can make changes, modifications, substitutions and variations to the above described embodiments within the scope of the invention.
Claims (29)
1. a kind of solar cell module, which is characterized in that including：The upper glass plates that are sequentially stacked, front adhesive film, solar energy
Battery chip arrays, back side adhesive film and backboard, the backboard are steam insulating back panel, and the steam of the steam insulating back panel penetrates
Rate is less than or equal to 0.1mg/m2/ day, the solar cell chip arrays include multiple cell pieces and conductor wire, adjacent cell piece
Between be connected by the conductor wire, the front of the cell piece has a secondary grid line, the conductor wire by welding layer with it is described
Secondary grid line welding, the welding layer contain alloy, and the alloy contains Sn and Bi.
2. solar cell module according to claim 1, which is characterized in that the steam insulating back panel for lower glass or
Metallic plate.
3. solar cell module according to claim 1, which is characterized in that pass through wire phase between adjacent cell piece
Even, reciprocation extension between the surface of a cell piece and the surface of another cell piece of the wire in adjacent cell piece
To form multiple conductor wires.
4. solar cell module according to claim 1, which is characterized in that the alloy also contain selected from Cu, In,
At least one of Ag, Sb, Pb and Zn metal.
5. solar cell module according to claim 4, which is characterized in that in the alloy, with the total of the alloy
On the basis of weight, it be the content of 30-75 weight %, Cu is 0-20 weight % that the content of Bi, which is the content of 15-60 weight %, Sn,
It is the content of 0-3 weight %, Sb be the content of 0-20 weight %, Pb is 0-10 that the content of In, which is the content of 0-40 weight %, Ag,
The content of weight % and Zn are 0-20 weight %.
6. solar cell module according to claim 5, which is characterized in that the alloy is selected from 50%Sn-48%Bi-
At least one of 1.5%Ag-0.5%Cu, 58%Bi-42%Sn and 65%Sn-20%Bi-10%Pb-5%Zn.
7. solar cell module according to claim 3, which is characterized in that the wire is in one cell piece
Front and another cell piece the back side between reciprocation extension；The back side of the cell piece is equipped with back electrode, described
The back electrode of wire and another cell piece welds.
8. the solar cell module according to claim 3 or 7, which is characterized in that the wire reciprocation extension 10-60
It is secondary；Spacing between adjacent conductive line is 2.5-15mm.
9. the solar cell module according to claim 3 or 7, which is characterized in that the wire is one.
10. the solar cell module according to claim 3 or 7, which is characterized in that the cell piece is arranged into n × m's
Matrix form, wherein n are columns, and m is number of rows, and m-1 >=a >=1,
In same row's cell piece, the wire reciprocation extension is on the surface of a cell piece and another adjacent cell piece
Between surface, in adjacent two rows of cell pieces, the wire reciprocation extension a row in a cell piece surface with
Between the surface of a cell piece in a+1 rows.
11. solar cell module according to claim 10, which is characterized in that in same row's cell piece, the gold
Belong to silk reciprocation extension in the positive between the back side of another adjacent cell piece of cell piece,
In adjacent two rows of cell pieces, the wire reciprocation extension in the cell piece positioned at the end that a is arranged just
Between face and the back side of a cell piece positioned at the end of a+1 rows, with adjacent two rows of cell piece of connecting；Reciprocation extension is same
Wire between the adjacent cell piece of one row is one, and wire of the reciprocation extension between the cell piece of adjacent row is one
Root.
12. solar cell module according to claim 3, which is characterized in that the wire with the cell piece
Reciprocation extension in a tensioned state before connection.
13. solar cell module according to claim 1, which is characterized in that the front adhesive film and the back side
Adhesive film is silica gel.
14. solar cell module according to claim 1, which is characterized in that the inside of the steam insulating back panel applies
There is the reflecting coating of white.
15. solar cell module according to claim 2, which is characterized in that the outer of the upper glass plates and described
The fluid sealant sealing of butyl rubber or Oppanol is clamped between the outer of steam insulating back panel.
16. solar cell module according to claim 15, which is characterized in that the upper glass plates and the steam are exhausted
Edge backboard outer is fixed by U-frame using silica gel or butyl rubber or double faced adhesive tape, and the upper glass plates and the lower glass
Fluid sealant is filled between the outer and the U-frame of glass or metallic plate.
17. solar cell module according to claim 1, which is characterized in that the front adhesive film and the conduction
Line is in direct contact and is filled between adjacent conductor wire.
18. solar cell module according to claim 3, which is characterized in that the wire is in adjacent cell piece
The front of a cell piece and the back side of another cell piece between reciprocation extension, the front adhesive film and one electricity
Conductor wire on the front of pond piece is in direct contact and is filled between the adjacent conductive line on the front of one cell piece, institute
The conductor wire for stating back side adhesive film and the back side of another cell piece is in direct contact and is filled in another described cell piece
The back side adjacent conductive line between.
19. solar cell module according to claim 1, which is characterized in that the size of the cell piece for 156mm ×
156mm；The series resistance of the solar cell module is 380-440 milliohm/60 piece.
20. solar cell module according to claim 1, which is characterized in that the size of the cell piece for 156mm ×
156mm；The open-circuit voltage of the solar cell module is 37.5-38.5V/60 pieces；Short circuit current is 8.9-9.4A.
21. solar cell module according to claim 1, which is characterized in that the filling of the solar cell module
The factor is 0.79-0.82.
22. solar cell module according to claim 1, which is characterized in that the size of the cell piece for 156mm ×
156mm；The operating voltage of the solar cell module is 31.5-32V/60 pieces；Operating current is 8.4-8.6A.
23. solar cell module according to claim 1, which is characterized in that the size of the cell piece for 156mm ×
156mm；The transfer efficiency of the solar cell module is 16.5-17.4%；Power is 265-280W/60 pieces.
24. a kind of preparation method of solar cell module according to claim 1, which is characterized in that including：
Upper glass plates, front adhesive film, the battery chip arrays, back side adhesive film and steam insulating back panel are stacked successively, and
Making the front of cell piece, in face of front adhesive film then the back side of cell piece is laminated to obtain described in face of back side adhesive film
Solar cell module, wherein the solar battery sheet array includes multiple cell pieces and conductor wire, between adjacent cell piece
It is connected by the conductor wire, the front of the cell piece has secondary grid line, and the conductor wire passes through welding layer and the secondary grid
Wire bonding, the welding layer contain alloy, and the alloy contains Sn and Bi.
25. the preparation method of solar cell module according to claim 24, which is characterized in that between adjacent cell piece
It is connected by wire, the surface of a cell piece of the wire in adjacent cell piece and the surface of another cell piece
Between reciprocation extension to form multiple conductor wires；By the secondary grid line on the front of the wire and one cell piece
It welds and the wire is connected with the backplate on the back side of another cell piece.
26. the preparation method of solar cell module according to claim 25, which is characterized in that the wire is one
Root.
27. the preparation method of solar cell module according to claim 25, which is characterized in that the wire is being opened
Reciprocation extension under tight state.
28. the preparation method of solar cell module according to claim 25, which is characterized in that the cell piece arrangement
Into the matrix form of n × m, wherein n is columns, and m is number of rows,
In same row's cell piece, the wire reciprocation extension is on the surface of a cell piece and another adjacent cell piece
Between surface, in adjacent two rows of cell pieces, the wire reciprocation extension a row in a cell piece surface with
Between the surface of a cell piece in a+1 rows, and m-1 >=a >=1；In adjacent two rows of cell pieces, the wire is reciprocal
Extend in the surface positioned at the surface of the cell piece of the end of a rows and the cell piece positioned at the end of a+1 rows
Between, the end of a rows is located at the same side of the matrix with the a+1 end arranged.
29. the preparation method of the solar cell module according to any one of claim 25-28, which is characterized in that past
The wire extended in again between the adjacent cell piece of same row is one, and reciprocation extension is between the cell piece of adjacent row
Wire is one.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510546524.5A CN105576057B (en) | 2014-10-31 | 2015-08-31 | Solar cell module and preparation method thereof |
| JP2017523431A JP2017537469A (en) | 2014-10-31 | 2015-10-30 | Solar cell module and manufacturing method thereof |
| EP15855152.3A EP3198656A4 (en) | 2014-10-31 | 2015-10-30 | Solar cell module and manufacturing method thereof |
| PCT/CN2015/093418 WO2016066135A1 (en) | 2014-10-31 | 2015-10-30 | Solar cell module and manufacturing method thereof |
| US14/928,863 US20160126391A1 (en) | 2014-10-31 | 2015-10-30 | Solar cell module and manufacturing method thereof |
Applications Claiming Priority (21)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410606607 | 2014-10-31 | ||
| CN2014106066017 | 2014-10-31 | ||
| CN201410608469 | 2014-10-31 | ||
| CN2014106067005 | 2014-10-31 | ||
| CN201410608576 | 2014-10-31 | ||
| CN201410608579X | 2014-10-31 | ||
| CN2014106066750 | 2014-10-31 | ||
| CN2014106066074 | 2014-10-31 | ||
| CN201410608577 | 2014-10-31 | ||
| CN201410608580 | 2014-10-31 | ||
| CN2014106085770 | 2014-10-31 | ||
| CN2014106085766 | 2014-10-31 | ||
| CN201410606700 | 2014-10-31 | ||
| CN2014106085802 | 2014-10-31 | ||
| CN201410608579 | 2014-10-31 | ||
| CN201410606675 | 2014-10-31 | ||
| CN201410606601 | 2014-10-31 | ||
| CN2014106084693 | 2014-10-31 | ||
| CN201510085666 | 2015-02-17 | ||
| CN2015100856666 | 2015-02-17 | ||
| CN201510546524.5A CN105576057B (en) | 2014-10-31 | 2015-08-31 | Solar cell module and preparation method thereof |
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| CN105576057A CN105576057A (en) | 2016-05-11 |
| CN105576057B true CN105576057B (en) | 2018-06-26 |
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|---|---|
| EP (1) | EP3198656A4 (en) |
| JP (1) | JP2017537469A (en) |
| CN (1) | CN105576057B (en) |
| WO (1) | WO2016066135A1 (en) |
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| CN106229356A (en) * | 2016-08-31 | 2016-12-14 | 连云港神舟新能源有限公司 | A kind of many main grids double-side solar cell assembly |
| CN106299001B (en) * | 2016-09-07 | 2019-04-23 | 珠海格力电器股份有限公司 | Photovoltaic module of anti PID effect |
| CN107984140B (en) * | 2017-11-14 | 2019-10-29 | 宁波市富星电子有限公司 | A kind of double-glass solar energy assembly battery strings welder |
| CN110212052B (en) * | 2019-07-23 | 2024-04-30 | 绵阳皓华光电科技有限公司 | Water-blocking front plate for interconnecting integrated solar cells and processing method thereof |
| WO2022033322A1 (en) * | 2020-08-10 | 2022-02-17 | 苏州阿特斯阳光电力科技有限公司 | Photovoltaic module |
| CN112201720B (en) * | 2020-09-30 | 2023-06-13 | 浙江晶科能源有限公司 | Solar cell module preparation method and solar cell module |
| CN113471362B (en) * | 2021-05-18 | 2024-09-10 | 宣城先进光伏技术有限公司 | Interconnection process method of perovskite battery |
| CN114883426A (en) * | 2022-04-26 | 2022-08-09 | 中威新能源(成都)有限公司 | Solar cell interconnection method, solar cell and solar cell module |
| CN114975646A (en) * | 2022-05-31 | 2022-08-30 | 杭州福斯特应用材料股份有限公司 | Conductive adhesive film, manufacturing method thereof and back contact solar cell |
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| CN201112398Y (en) * | 2007-08-28 | 2008-09-10 | 比亚迪股份有限公司 | Solar energy battery components |
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-
2015
- 2015-08-31 CN CN201510546524.5A patent/CN105576057B/en active Active
- 2015-10-30 WO PCT/CN2015/093418 patent/WO2016066135A1/en active Application Filing
- 2015-10-30 JP JP2017523431A patent/JP2017537469A/en active Pending
- 2015-10-30 EP EP15855152.3A patent/EP3198656A4/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP3198656A4 (en) | 2017-11-22 |
| WO2016066135A1 (en) | 2016-05-06 |
| CN105576057A (en) | 2016-05-11 |
| EP3198656A1 (en) | 2017-08-02 |
| JP2017537469A (en) | 2017-12-14 |
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