CN106206819A

CN106206819A - Solaode chip arrays, solar module and preparation method thereof

Info

Publication number: CN106206819A
Application number: CN201510221302.6A
Authority: CN
Inventors: 赵志强; 康淑萍; 姜占锋; 何龙
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2014-10-31
Filing date: 2015-04-30
Publication date: 2016-12-07
Also published as: CN106206818B; CN106206812A; CN106206808A; CN106206767B; CN106206818A; CN106206764A; CN106206762A; CN106206813A; CN106206769A; CN106206815A; CN106206812B; CN106206765A; CN106206768A; CN106206810A; CN106206764B; CN106206766A; CN106206807A; CN106206763A; CN106206816B; CN106206814A

Abstract

This application discloses a kind of solaode chip arrays, solar module and the preparation method of solar module, solaode chip arrays includes multiple cell piece and the conductor wire being made up of tinsel, any 2 adjacent cell pieces are connected by described conductor wire, described conductor wire is connected with the secondary grid line in the front of described cell piece, and the front pair grid line of described cell piece is provided with connecting material layer in the position being connected with described conductor wire.Solaode chip arrays according to the embodiment of the present application, by arranging connecting material layer on the secondary grid line in the front of cell piece, can be good at improving the switching performance between conductor wire and secondary grid line so that this solar module has of a relatively high electricity conversion.

Description

Solaode chip arrays, solar module and preparation method thereof

Technical field

The application relates to area of solar cell, more particularly to solaode chip arrays, solar module and system thereof Preparation Method.

Background technology

Solar module is one of vitals of device of solar generating.Sunlight from the front illuminated of cell piece to electricity On the sheet of pond, the front of cell piece is provided with secondary grid line and main gate line, is then drawn by the welding that covering is welded in main gate line Electric current, welding, main gate line and secondary grid line cover the part in the front of cell piece, thus can block a part of sunlight, shine Solar energy on welding, main gate line and secondary grid line cannot be transformed into electric energy, accordingly, it would be desirable to welding, main grid and secondary grid are more Thin the best.But, the effect of welding, main gate line and secondary grid line is to conduct electric current, from the point of view of resistivity, welding, Main gate line and secondary grid line more detailed rules and regulations conduction cross-sectional area are the least, and ohmic loss is the biggest.Therefore welding, main gate line and secondary grid line set Meter needs to obtain balance, cost to be considered between shading and conduction.

Summary of the invention

The application is to make following facts and the discovery of problem and understanding based on applicant:

In correlation technique, the slurry of the main gate line and secondary grid line that make solar battery sheet is mainly composed of expensive silver, The preparation thus causing main gate line and secondary grid line is complicated, and cost is high, and is connected as cell piece during assembly needing one The main gate line in cell piece front is welded with the backplate of adjacent cell sheet by welding, and therefore the welding of main gate line is complicated, electricity The production cost of pond sheet is high.

In correlation technique, the front of cell piece is typically provided with two main gate line, and two main gate line are by the positive topcoating at cell piece Covering silver slurry to be formed, and the width of main gate line is big (such as, width reaches more than 2mm), thus consumption silver amount is big, cell piece Production cost is high.

In correlation technique, it is proposed that there is the solar battery sheet of 3 main gate line, but yet suffer from consuming silver amount and cost height, And, 3 main gate line increase shading-area, reduce conversion efficiency.

Additionally, the raising of main gate line quantity is also limited by welding, main gate line quantity is the biggest, and single main grid is the thinnest, welding More narrow, main gate line is welded the most difficult with welding, and the narrowest being more difficult to of welding manufactures, and welding cost is the highest.

Therefore, from reducing cost, the angle reducing shading-area is set out, and will originally be printed on cell piece in correlation technique Silver main gate line replaces with tinsel, such as copper wire, is welded thus derived current with secondary grid line by copper wire.Due to not in use by silver Main gate line, its cost can be greatly reduced, simultaneously because the diameter of copper wire is less, it is possible to reduction shading-area, therefore, can Further quantity is risen to 10.This cell piece is properly termed as dereliction grid cell sheet, and wherein, tinsel substituted for passing Silver-colored main grid in system solar battery sheet and welding.

Correlation technique has employing will be adhesive with hyaline membrane wiry to electrically connect with cell piece with cell piece lamination formation tinsel Technical scheme, i.e. first by many parallel tinsels by bonding by the way of be fixed on transparent film layer, then pasted Closing on cell piece, make tinsel contact with the secondary grid line on cell piece finally by laminating technology, it is to pass through laminating technology Tinsel is made to contact with secondary grid line, thus derived current.This technical scheme not only hyaline membrane have impact on the absorbance of light, and And the most parallel tinsel is connected the situation that there is also loose contact with cell piece, have a strong impact on its electrical property, therefore need to add Big radical wiry, but increasing of radical wiry, can affect again the absorbance of the light in front, have impact on the property of product Can, therefore, use the product of this scheme not promote and commercialization.Additionally, as it has been described above, the most parallel is wiry Radical nevertheless suffers from the restriction of the spacing between adjacent wire.

Such as, United States Patent (USP) discloses a kind of employing hyaline membrane and fixes technical scheme wiry, in that patent, Duo Gezhu Grid line be arranged in parallel, and is pressed on cell piece by transparent film layer.Hyaline membrane when being laminated with main gate line, the temperature of lamination Far below the fusion temperature of hyaline membrane, can not fit with cell piece due to the interval of main gate line between hyaline membrane and cell piece, Will there is gap between hyaline membrane and cell piece, thus cause the sealing of cell piece assembly poor, due to air and steam Oxidation, can largely effect on the photoelectric transformation efficiency of cell piece.

Therefore, in area of solar cell, the structure of solaode is the most uncomplicated, but each structure is more crucial, main Due to the factor of each side, the preparation of grid considers that such as shading surface, conductivity, equipment, technique, cost etc. cause it to be Difficult point in solar battery technology and focus.Those skilled in the art, through the effort of several generations many times, just make on the market Solar battery sheet was become three main grid solaodes by two main grid solaodes at about 2007, and a small amount of producer is 2014 Proposing the solaode of four main grids about Nian, the technology of many main grids is also the concept the most just proposed, but realizes more Difficulty, does not has more ripe product yet.

The application is intended to solve one of above-mentioned technical problem the most to a certain extent.

Present applicant proposes dereliction grid solar cell, this dereliction grid solar cell without arranging main gate line on cell piece, Without welding, reduce cost, and can commercialization, preparation is simple easily to be realized, particularly low cost, and equipment is simple, Can produce in batches, electricity conversion is high.

According to the solaode chip arrays of the application first aspect embodiment, including multiple cell pieces and it is made up of tinsel Conductor wire, any 2 adjacent cell pieces are connected by described conductor wire, the front of described conductor wire and described cell piece Secondary grid line is connected, and the front pair grid line of described cell piece is provided with connecting material layer in the position being connected with described conductor wire.

Solaode chip arrays according to the embodiment of the present application, by arranging connection material on the secondary grid line in the front of cell piece The bed of material, it is possible to well improve the switching performance between conductor wire and secondary grid line so that this solar module has relatively Higher electricity conversion.

The solar module of embodiment according to a second aspect of the present invention, including the upper cover plate being sequentially stacked, front adhesive film, Cell piece array, back side adhesive film and backboard, described cell piece array is according to the solar battery sheet described in above-described embodiment Array.

The preparation method of the solar module of embodiment according to a third aspect of the present invention, including: adjacent cell piece is with by gold The conductor wire belonging to silk composition is connected thus by multiple cell pieces formation cell piece array, by described a plurality of conductor wire and cell piece The secondary grid line in front is connected, and the secondary grid line in the front of wherein said cell piece is provided with in the position being connected with described conductor wire even Connect material layer；Upper cover plate, front adhesive film, described cell piece array, back side adhesive film and backboard are stacked successively, and makes The front of cell piece in the face of front adhesive film, the back side of cell piece in the face of back side adhesive film, then carry out lamination obtain described in too Sun can battery component.

Accompanying drawing explanation

Fig. 1 is the floor map of the solaode chip arrays according to one embodiment of the application.

Fig. 2 is the horizontal schematic cross-section of the solaode chip arrays according to one embodiment of the application.

Fig. 3 is longitudinal schematic cross-section of the solaode chip arrays according to one embodiment of the application.

Fig. 4 is the schematic diagram wiry for forming conductor wire according to the embodiment of the present application.

Fig. 5 is the floor map of the solaode chip arrays according to another embodiment of the application.

Fig. 6 is the floor map of the solaode chip arrays according to the another embodiment of the application.

Fig. 7 is the schematic diagram of the reciprocation extension wiry according to the embodiment of the present application.

Fig. 8 is the schematic diagram of two cell pieces of the solaode chip arrays according to the embodiment of the present application.

Fig. 9 is that two cell pieces shown in Fig. 8 are formed by connecting by tinsel the schematic diagram of solaode chip arrays.

Figure 10 is the schematic diagram of the solar module according to the embodiment of the present application.

Figure 11 is the schematic partial cross-sectional view of solar module shown in Figure 10.

Figure 12 is the schematic diagram of the solaode chip arrays according to the application another embodiment.

Figure 13 is the structural representation of the secondary grid line according to one embodiment of the application.

Reference:

Cell piece assembly 100；

Upper cover plate 10；

Front adhesive film 20；

Cell piece array 30；Cell piece 31；First cell piece 31A；Second cell piece 31B；Cell piece matrix 311；Secondary grid Line 312；Front pair grid line 312A；Back side pair grid line 312B；Connecting material layer 3121；Back of the body electric field 313；Back electrode 314；

Conductor wire 32；Front side conductive line 32A；Back side conductor wire 32B；Tinsel body 321；Clad 322；Short grid line 33；

Back side adhesive film 40；

Lower cover 50.

Detailed description of the invention

Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.

In this application, in order to more understand and be easy to describe, below part term is explained.

Term " cell piece 31 " includes cell piece matrix 311, the secondary grid line 312 being located on cell piece matrix 311 front, sets Back of the body electric field 313 at the back side of cell piece matrix 311 and the back electrode 314 being located on back of the body electric field 313, thus, secondary grid line The 312 secondary grid lines 312 being referred to as cell piece 31, 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 is referred to as the back electrode 314 of cell piece 31.

" cell piece matrix 311 " such as can be by silicon chip after the operations such as making herbs into wool, diffusion, etching edge, deposited silicon nitride layer The intermediate products obtained, it should be understood that in the application, cell piece matrix 311 is not limited to be made up of silicon chip, Such as can also include thin-film solar cells matrix or other any suitable solaode sheet matrixes 311.

In other words, cell piece 31 includes silicon chip, some of silicon chip surface processes layers, the secondary grid line of sensitive surface and shady face Back of the body electric field 313 and back electrode 314, or other class solaodes not having front electrode of equivalent.

Term " battery unit " includes cell piece 31 and the conductor wire 32 being made up of tinsel S.

Term " solaode chip arrays 30 " includes that multiple cell piece 31 is connected and by tinsel with by adjacent cell sheet 31 The conductor wire 32 that S is constituted, in other words, solaode chip arrays 30 is by multiple cell pieces 31 being connected by conductor wire 32 Arrangement forms.

In solaode chip arrays 30, tinsel S constitutes the conductor wire 32 of battery unit, and tinsel S extends in adjacent Should broadly understood between the surface of cell piece 31, tinsel S can extend between the front of adjacent cell sheet 31, also Can extend between front and the back side of another cell piece 31 of a cell piece 31 in adjacent cell sheet 31.At gold When genus silk S extends between front and the back side of another cell piece 31 of a cell piece 31 in adjacent cell sheet 31, Conductor wire 32 can include that extending in the front electrically connected on the front of cell piece 31 and with the secondary grid line 312 of cell piece 31 leads Electric wire 32A, and extend in the back side conduction electrically connected on the back side of cell piece 31 and with the back electrode 314 of cell piece 31 Line 32B, the tinsel S part between adjacent cell sheet 31 is properly termed as connecting conductor wire.

Herein it should be noted that in this application, tinsel S refers to that reciprocation extension forms conductor wire 32 on cell piece 31 Tinsel, conductor wire 32 can be tinsel body 321, it is also possible to be to include tinsel body 321 and tinsel body The clad 322 of outer layer, i.e. tinsel S can also be tinsel bodies 321, and tinsel S can also be to include metal simultaneously Silk body 321 and the clad 322 of this volume surrounding of tinsel, clad 322 herein is weld layer or conducting resinl.

In this application, it is preferred that tinsel S is tinsel body 321.Tinsel body 321 can be copper wire or aluminum Silk, it is preferred that tinsel body 321 is copper wire.Corresponding, tinsel S can also be copper wire or aluminium wire, preferably , tinsel S is copper wire.Preferably, tinsel S has circular cross section, and thus, more sunlight can irradiate On cell piece matrix, improve photoelectric transformation efficiency further.

In this application, cell piece matrix 311, cell piece 31, battery unit, cell piece array 30 and solar battery group Part is intended merely to facilitate description, and it is not intended that restriction to the application.

The all scopes disclosed in the application all comprise end points and can independently combine.Scope disclosed herein End points and any value are not limited to this accurate scope or value, these scopes or value should be understood to comprise close to these scopes or The value of value.

In this application, except as otherwise noted, directional terminology such as " upper and lower " typically refers to shown in the drawings upper and lower；" just Face " refer to solar module one side towards light in application process, namely sensitive surface；" back side " refers to solar energy Battery component in application process back to the one side of light.

Solaode chip arrays 30 according to the embodiment of the present application is described below.

As shown in figure 1 to figure 13, multiple cell piece 31 He is included according to the solaode chip arrays 30 of the embodiment of the present application Conductor wire 32, conductor wire 32 is connected with the secondary grid line 312 of cell piece 31, and secondary grid line 312 is being connected with conductor wire 32 Position be provided with connecting material layer 3121.

In other words, the cell piece array 30 of the application is made up of at least two cell piece 31, between adjacent two cell pieces 31 Being connected by a plurality of conductor wire 32, cell piece 31 includes cell piece matrix 311 and the secondary grid being located on cell piece matrix 311 Line 312, conductor wire 32 is connected with secondary grid line 312 to realize the connection between adjacent two cell pieces 31.Wherein, secondary grid On line 312 need to be provided with on the position that is connected with conductor wire 32 for being connected with conductor wire 32 connecting material layer 3121 (as Shown in Figure 13).

Thus, according to the solaode chip arrays 30 of the embodiment of the present application, by arranging and conductor wire on secondary grid line 312 The 32 connecting material layers 3121 being connected, so can improve the switching performance between conductor wire 32 and secondary grid line 312, it is to avoid Drift about between conductor wire 32 and secondary grid line 312, turn so that this solar module has of a relatively high photoelectricity Change efficiency.

In some detailed description of the invention of the application, connecting material layer is weld layer or conducting resinl.It is to say, in this Shen In please, the connecting material layer 3121 on secondary grid line 312 can be weld layer, it is also possible to be conducting resinl.

Specifically, weld layer can be alloy-layer, alloy-layer contain Sn, Bi and selected from Cu, In, Ag, Sb, Pb and At least one metal in Zn, the fusing point of alloy-layer is 100-220 DEG C.

Alternatively, the thickness of weld layer is 1-20 micron, preferably 4-10 micron.The width of weld layer can be 10-300 Micron, preferably 30-120 micron.Further, the length of weld layer can be 0.1-2mm, it is preferred that weld layer Length can be 0.25-1mm.

It is to say, weld layer can be low-melting-point metal or alloy.Can be such as ashbury metal, ashbury metal can be conventional Ashbury metal, can be such as stannum and the alloy of at least one metal in Bi, Pb, Ag and Cu, specifically, as SnBi, SnPb, SnBiCu, SnPbAg etc..So can avoid cell piece 312 secondary grid line 312 and conductor wire 32 it Between rosin joint occurs so that the solar module of final preparation has of a relatively high electricity conversion.

More specifically, low-melting alloy layer can be completely covered secondary grid line 312, it is also possible to part covers secondary grid line 312.When low When melting alloy layer segment covers secondary grid line 312, low-melting alloy layer is preferably formed in the position welded with conductor wire 32. The thickness of low-melting alloy layer, width and length can select in the larger context.Under preferable case, low-melting alloy layer Thickness be 4-10 micron, width is 30-120 micron, a length of 0.25-1mm.Form the low melting point of low-melting alloy layer Alloy can be the low-melting alloy that this area is conventional, and its fusing point can be 100-220 DEG C.

Under preferable case, low-melting alloy contains Sn and is selected from least one in Bi, In, Ag, Sb, Pb and Zn, More preferably contain Sn, Bi and be selected from least one in In, Ag, Sb, Pb and Zn.Specifically, low-melting alloy can Think that Sn-Bi alloy, In-Sn alloy, Sn-Pb alloy, Sn-Bi-Pb alloy, Sn-Bi-Ag alloy, In-Sn-Cu close At least one in gold, Sn-Bi-Cu alloy and Sn-Bi-Zn alloy.Most preferably, low-melting alloy is that Bi-Sn-Pb closes Gold, such as Sn content be 40 weight %, Bi content be 55 weight % and alloy that Pb content is 5 weight % (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 Think 0.01-0.5mm².Tinsel can be tinsel commonly used in the art, such as copper wire.

In some detailed description of the invention of the application, in the alloy, on the basis of the gross weight of this alloy, the content of Bi is 15-60 weight %, the content of Sn is 30-75 weight %, and the content of Cu is 0-20 weight %, and the content of In is 0-40 weight %, The content of Ag is 0-3 weight %, and the content of Sb is 0-20 weight %, and the content of Pb is 0-10 weight %, and the containing of Zn Amount is 0-20 weight %.Preferably, alloy be selected from 50%Sn-48%Bi-1.5%Ag-0.5%Cu, 58%Bi-42%Sn and At least one in 65%Sn-20%Bi-10%Pb-5%Zn.

An embodiment according to the application, between adjacent cell sheet 31 by tinsel S-phase even, at least one one metal wire S Between surface and the surface of another cell piece 31 of a cell piece 31 in adjacent cell sheet 31, reciprocation extension is to be formed Multiple conductor wires 32, conductor wire 32 is connected with the secondary grid line 312 of cell piece, wherein the secondary grid line 312 in the front of cell piece 31 On be provided with connecting material layer 3121 in the position being connected with conductor wire 32.

It is to say, in this application, two adjacent cell pieces 31 are connected by conductor wire 32, and at least one Tinsel S reciprocation extension between the surface of two adjacent cell pieces 31 constitutes conductor wire 32, the secondary grid on cell piece 31 Line 312 is provided with connecting material layer, and therefore, conductor wire 32 is namely by connecting material layer 3121 and secondary grid line 312 phase Even.

Here, cell piece 31 constitutes battery with the conductor wire 32 being made up of the tinsel S extended on this cell piece 31 surface Unit, in other words, is made up of multiple battery units according to the solaode chip arrays 30 of the embodiment of the present application, multiple batteries The conductor wire 32 of unit is made up of reciprocation extension tinsel S on the surface of adjacent cell sheet 31.

It is to be appreciated that in this application, term " reciprocation extension " is referred to as " coiling ", may refer to tinsel S extends along reciprocal stroke between the surface of cell piece 31.

In this application, " tinsel S reciprocation extension is between the surface of cell piece 31 " should broadly understood, such as, and gold Belonging to silk S can be with the surface on the surface of a reciprocation extension cell piece 31 in adjacent cell sheet 31 Yu another cell piece 31 Between, tinsel S can also extend through intermediate cell sheet 31 surface of predetermined quantity from the surface of first cell piece 31 To the surface of last cell piece 31, then return from the surface of last cell piece 31 and extend through described predetermined The surface of the intermediate cell sheet 31 of quantity, to the surface of first cell piece 31, is so repeated.

Additionally, when cell piece 31 is by tinsel S parallel connection, tinsel S can be with reciprocation extension in the front of two cell pieces On, in the case, tinsel S constitutes the front side conductive line 32A of two cell pieces of this parallel connection, alternatively, tinsel S Reciprocation extension on the front of a cell piece 31 and by another tinsel S reciprocation extension on the back side of this cell piece 31, In the case, extend in the tinsel S on cell piece 31 front and constitute front side conductive line 32A, extend in cell piece 31 The back side tinsel S constitute back side conductor wire 32B.

When cell piece 31 is one another in series by tinsel S, in adjacent cell sheet 31 one of tinsel S reciprocation extension Between front and the back side of another cell piece 31 of cell piece 31, in the case, tinsel S is at a cell piece 31 Front on extend part constitute front side conductive line 32A, tinsel S extend on the back side of another cell piece 31 adjacent Part constitute back side conductor wire 32B.In this application, unless expressly stated otherwise, conductor wire 32 can be understood as front Conductor wire 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 tinsel S and extends " one is reciprocal " two conductor wires 32 of formation, Two conductor wires 32 are formed by an one metal wire S coiling, and such as, adjacent two conductor wires form U-shaped structure or V Shape structure, but the application is not limited to this.

Cell piece array 30 according to the embodiment of the present application, the conductor wire 32 of multiple cell pieces is by the tinsel S of reciprocation extension Constituting, and be connected by conductor wire 32 between adjacent cell sheet 31, therefore, the front of cell piece is held high without using price Your silver main grid, and manufacturing process is simple, it is not necessary to use welding to connect cell piece, the secondary grid line of tinsel S and cell piece and Back electrode easy to connect, the cost of cell piece is substantially reduced.

Additionally, due to conductor wire 32 is made up of the tinsel S of reciprocation extension, (i.e. tinsel is at electricity for the width of conductor wire 32 The width of the projection on the sheet of pond) can reduce, reduce the shading-area of battery front side, and, the quantity of conductor wire 32 can To adjust easily, compared with the main gate line that silver slurry is formed, the resistance of conductor wire 32 reduces, and improves photoelectric transformation efficiency. Owing to tinsel S reciprocation extension forms conductor wire, when using cell piece array 30 to manufacture solar module 100, gold Belong to silk S and be difficult to displacement, i.e. tinsel " drift " is less likely to occur, does not interferes with photoelectric transformation efficiency, further increase light Photoelectric transformation efficiency.

Solaode chip arrays according to the embodiment of the present application, by conductor wire is made up of the tinsel of reciprocation extension, should The conductor wire of structure uses coiling arrangement mode reciprocation extension between adjacent two cell pieces 31 to form collapsed shape, not only makes Make simple, low cost, and be conducive to improving the electricity conversion of solaode chip arrays, conductor wire 32 and secondary grid line 312 are weldingly connected, and the conductor wire 32 in solar module will not occur drift and rosin joint, and shows of a relatively high Electricity conversion.

Therefore, according to the solaode chip arrays 30 of the embodiment of the present application, low cost, photoelectric transformation efficiency are high.

Below with reference to the accompanying drawings solaode chip arrays 30 according to the application specific embodiment is described.

With reference to Fig. 1-3, the solaode chip arrays 30 according to one specific embodiment of the application is described.

In the embodiment shown in Fig. 1-3, it is shown that two cell pieces of solaode chip arrays 30, in other words, it is shown that Two cell pieces 31 being connected with each other by the conductor wire 32 being made up of tinsel S.

It is understood that cell piece 31 includes cell piece matrix 311, secondary grid on the front that is located at cell piece matrix 311 Line 312 (i.e. front pair grid line 312A), the back of the body electric field 313 being located on the back side of cell piece matrix 311 and be located at back of the body electric field Back electrode 314 on 313.In this application, it is to be understood that unless expressly stated otherwise, back electrode 314 can be The back electrode of conventional batteries sheet, such as, formed by silver slurry printing, it is also possible to the secondary grid line being analogous on cell piece front side of matrix Back side pair grid line 312B, it is also possible to for discrete multiple weld parts, in this application, unless expressly stated otherwise, secondary grid Line refers to the secondary grid line 312 on the front of cell piece matrix 311.

As Figure 1-3, in this embodiment, solaode chip arrays includes two cell piece 31A, and 31B is (in order to retouch State conveniently, the referred to herein as first cell piece 31A, the second cell piece 31B), tinsel S reciprocation extension is at the first cell piece 31A Front (sensitive surface, the upper surface in Fig. 2) and the back side of the second cell piece 31B between, thus, tinsel S constitute The front side conductive line of the first cell piece 31A and the back side conductor wire of the second cell piece 31B, tinsel S and the first battery The secondary grid line of sheet 31A electrically connects (such as weld or bond with conducting resinl) and electrically connects with the back electrode of the second cell piece 31B.

In an embodiment of the application, the back side of cell piece matrix 311 is provided with back electrode 314, the back side of cell piece 31 Being provided with the back side conductor wire 32B being made up of tinsel S, back side conductor wire 32B is weldingly connected with back electrode 314.

It is to say, in this embodiment, the front of cell piece matrix 311 is provided with front pair grid line 312A, this battery chip base The back side of body 311 is provided with back electrode 314, when conductor wire 32 is positioned at the front of cell piece matrix 311, conductor wire 32 with just Face pair grid line 312A is weldingly connected, when conductor wire 32 is positioned at the back side of cell piece matrix 311, then with this cell piece matrix The back electrode 314 at the back side of 311 is weldingly connected.

In certain embodiments, tinsel is reciprocation extension 10-60 time between the first cell piece 31A and the second cell piece 31B, Preferably, as it is shown in figure 1, tinsel reciprocation extension 12 times is to form 24 conductor wires, and tinsel is single, changes Yan Zhi, single metal wire reciprocation extension forms 24 conductor wires 12 times, and the spacing between adjacent conductive line can be 2.5 millis -15 millimeters of rice.According to this embodiment, compared with the conductor wire of conventional batteries sheet, quantity increase, thus reduce electric current from Secondary grid line, to the distance of conductor wire, decreases resistance, improves electricity conversion.In the embodiment shown in fig. 1, phase Adjacent conductor wire forms U-shaped structure, is thus easy to coiling wiry.Alternatively, the application is not limited to this, such as, and phase Adjacent conductor wire can also form v-shaped structure.

It addition, be easy to tinsel and secondary grid line and/or the electrical connection of back electrode, it is to avoid in connection procedure, tinsel drifts about and affects Photoelectric transformation efficiency, tinsel can be carried out, also with the electrical connection of battery lamellar body in the lamination process of solar module Can carry out before being laminated, it is preferable that be attached before being laminated.

In some embodiments it may be preferred that before tinsel contacts with cell piece, tinsel extends in a tensioned state, Will stretch by tinsel, after being connected with the secondary grid line and back electrode of cell piece, tensile force wiry can be discharged, by This is avoided the conductor wire drift when preparing solar module to affect photoelectric transformation efficiency further.

Fig. 5 shows the schematic diagram of the cell piece array of another embodiment according to the application.As it is shown in figure 5, tinsel is past Extending between the front of the first cell piece 31A and the front of the second cell piece 31B again, thus, tinsel forms the first electricity The front side conductive line of pond sheet 31A and the front side conductive line of 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, and the back electrode of the first cell piece 31A and The back electrode of two cell piece 31B can also be connected by the back side conductor wire that another tinsel reciprocation extension is formed, alternatively, The back electrode of the first cell piece 31A and the back electrode of the second cell piece 31B can also be connected by the way of traditional.

In cell piece array 30, cell piece 31 can use the cell piece 31 that this area is conventional, such as, can be polysilicon Cell piece 31.Secondary grid line 312 on the sensitive surface of cell piece 31 can be silver, copper, stannum, ashbury metal etc..Secondary grid line 312 Width can be 40-80 micron, thickness can be 5-20 micron, and secondary grid line 312 can be 50-120 bar, and adjacent Article two, the spacing of secondary grid line 312 can be 0.5-3mm.

The material of the back electrode 314 on the back side of cell piece 31 can be silver, copper, stannum, ashbury metal etc., and back electrode 314 leads to Being often banding, its width can be 1-4mm, and thickness can be 5-20 micron.

Below with reference to Fig. 6, the solaode chip arrays 30 according to another embodiment of the application is described.

Solaode chip arrays 30 according to the embodiment of the present application includes n × m cell piece 31, in other words, multiple batteries Sheet 31 is arranged into the matrix form of n × m, and wherein n is columns, and m is row.More specifically, in this embodiment, 36 Individual cell 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, such as, row Number and columns can be unequal.For convenience, in figure 6, along direction from left to right, in same row's cell piece 31 Cell piece 31 be referred to as the first, second, third, fourth, the 5th and the 6th cell piece 31 successively, along side from the top down To, the row of cell piece 31 is referred to as the first, second, third, fourth, the 5th and the 6th row's cell piece 31 successively.

In same row's cell piece 31, tinsel reciprocation extension is at the surface of a cell piece 31 and another adjacent cell piece Between the surface of 31, in two adjacent row's cell pieces 31, a tinsel reciprocation extension cell piece 31 in a arranges Surface and a+1 row in a cell piece 31 surface between, and m-1 >=a >=1.

As shown in Figure 6, in concrete example, in same row's cell piece 31, tinsel reciprocation extension is at a cell piece Between the front of 31 with the back side of another adjacent cell piece 31, thus, the cell piece 31 in same row is one another in series. In two adjacent row's cell pieces 31, tinsel reciprocation extension is in the front of the cell piece 31 of the end being positioned at a row And between the back side of a cell piece 31 of the end of a+1 row, the most adjacent two row's cell pieces 31 are one another in series.

It is highly preferred that in adjacent two row's cell pieces 31, tinsel reciprocation extension is at the battery of the end being positioned at a row The surface of sheet 31 and between the surface of the cell piece 31 of an end of a+1 row, an end of a row and the One end of a+1 row is positioned at the same side of matrix, the most in figure 6, is positioned at the right side of matrix.

More specifically, in the embodiment shown in fig. 6, in the first row, one metal wire reciprocation extension first cell piece Between the back side between front and second cell piece 31 of 31, the front of second one metal wire reciprocation extension the second cell piece 31 And between the back side between the 3rd cell piece 31, the front of the 3rd one metal wire reciprocation extension the 3rd cell piece 31 and the 4th electricity Between the back side between pond sheet 31, the front of the 4th one metal wire reciprocation extension the 4th cell piece 31 and the 5th cell piece 31 it Between the back side between, the back side between front and the 6th cell piece 31 of the 5th one metal wire reciprocation extension the 5th cell piece 31 Between, thus, the adjacent cell sheet 31 in first row is one another in series by corresponding tinsel.

The front of the 6th cell piece 31 in six roots of sensation tinsel reciprocation extension first row and the 6th battery in adjacent second row Between the back side between sheet 31, thus, first row and second row are one another in series, in the 7th one metal wire reciprocation extension second row The front of the 6th cell piece 31 and second row between the back side between the 5th cell piece 31, the 8th one metal wire back and forth prolongs Stretch in the front of the 5th cell piece 31 in second row and second row between the back side between the 4th cell piece 31, until the tenth The back of the body between first cell piece 31 in the front of the second cell piece 31 in one one metal wire reciprocation extension second row and second row Between face, then, in the front of the first cell piece 31 in the 12nd one metal wire reciprocation extension second row and the 3rd row first Between the back side between cell piece 31, thus second row and the 3rd row are one another in series.Then, successively by the 3rd row and the 4th row Series connection, the 4th row connects with the 5th row, and the 5th row connects with the 6th row, thus completes the preparation of cell piece array 30, at this In embodiment, busbar is set in the left side in the left side of the first cell piece 31 of first row and first cell piece 31 of the 6th row, One busbar connects the conductor wire extended from the left side of the first cell piece 31 of first row, and another busbar connects from the 6th The conductor wire that the left side of first cell piece 31 of row is extended.

As shown in the figure and above-mentioned, between the cell piece of the embodiment of the present application, it is connected by conductor wire series connection, first row, second Row, the 3rd row, the 4th row, conductor wire between the 5th row and the 6th row, is all used to realize series connection, as it can be seen, alternatively, Can also be in parallel for preventing the diode of spottiness between second row and the 3rd row, between the 4th row and the 5th row, two The connection of pole pipe can use the technology of well known to a person skilled in the art, such as busbar.

But, the application is not limited to this, such as, can connect between first row and second row, the 3rd row and the 4th row string Connection, the 5th row and the 6th row series connection, second row and the 3rd row are in parallel simultaneously, and the 4th row and the 5th row are in parallel, in the case, Can arrange in the left side of respective row or right side and be respectively provided with busbar.

Alternatively, the cell piece 31 in same row can be in parallel, such as, and the one metal wire the first cell piece from first row The front reciprocation extension of 31 front by the second to the 6th cell piece 31.

In some detailed description of the invention of the application, the adhesion between tinsel and cell piece 31 is 0.1-0.8 newton's In the range of.It is to say, the adhesion between conductor wire 32 and cell piece 31 is between 0.1-0.8 newton.Preferably, Adhesion between tinsel and cell piece 31 in the range of 0.2-0.6 newton, firm welding between cell piece and tinsel, Cell piece is difficult to sealing-off occur in operation and transfer process, is difficult to occur loose contact and the problem of hydraulic performance decline that causes, Cost is relatively low simultaneously.

Below with reference to Figure 10 and Figure 11, the solar module 100 according to the embodiment of the present application is described.

As shown in Figure 10 and Figure 11, upper cover plate 10, front are included according to the solar module 100 of the embodiment of the present application Adhesive film 20, above-mentioned cell piece array 30, back side adhesive film 40 and backboard 50.Upper cover plate 10, front adhesive film 20, Above-mentioned cell piece array 30, back side adhesive film 40 and backboard 50 are sequentially stacked along the vertical direction.

Front adhesive film 20 and back side adhesive film 40 can be adhesive film commonly used in the art, it is preferable that front glued membrane Layer 20 and back side adhesive film 40 polyethylene octene elastomer (POE) and/or ethylene-vinyl acetate copolymer (EVA).? In the application, polyethylene octene elastomer (POE) and ethylene-vinyl acetate copolymer (EVA) can use this area normal Advise the product used or prepare according to method well known to those skilled in the art.

In embodiments herein, upper cover plate 10 and backboard 50 can carry out selecting and true according to this area conventional technique Fixed, it is preferable that upper cover plate 10 and backboard 50 can be each transparent sheet material, such as glass plate.

In the preparation process of solar module 100, can be first by secondary grid line and the back electrode of conductor wire and cell piece 31 Bonding or welding, be then laid out each layer and be laminated.

Other component parts of solar module 100 according to the application can be known in the art, the most superfluous at this State.

In some detailed description of the invention of the application, the size for conventional cell piece is 156mm × 156mm；Solar energy The series resistance of battery component is 380-440 milliohm/60 slice, and the application is not limited to 60 simultaneously, can be 30, 72 etc., when for 72, the series resistance of solar module is 456-528 milliohm, the excellent electrical property of battery.

In some detailed description of the invention of the application, the size for conventional cell piece is 156mm × 156mm；Solar energy The open-circuit voltage of battery component is 37.5-38.5V/60 sheet, and same the application is not limited to 60, can be 30,72 Sheet etc..Short circuit current is 8.9-9.4A, and short circuit current is unrelated with the number of cell piece.

In some detailed description of the invention of the application, the fill factor, curve factor of solar module is 0.79-0.82, and it is not by electricity The size of pond sheet and the impact of number, it affects the electrical property of battery.

In some detailed description of the invention of the application, the size for conventional cell piece is 156mm × 156mm；Solar energy The running voltage of battery component is 31.5-32V/60 sheet, and same the application is not limited to 60, can be 30,72 Sheet etc..Operating current is 8.4-8.6A, and operating current is unrelated with the number of cell piece.

In some detailed description of the invention of the application, the size for conventional cell piece is 156mm × 156mm；Solar energy The conversion efficiency of battery component is 16.5-17.4%.Power is 265-280W/60 sheet.

The preparation method of the solar module 100 according to the embodiment of the present application is described below with reference to Fig. 7-9.

Specifically, comprise the following steps according to the preparation method of the solar module of the embodiment of the present application:

Adjacent cell piece is connected with the conductor wire 32 being made up of tinsel S and multiple cell pieces 31 is formed cell piece array, A plurality of conductor wire 32 is connected with the front pair grid line 312A of cell piece, wherein on the front pair grid line 312A of cell piece 31 It is provided with connecting material layer 3121 in the position being connected with conductor wire 32.

Preferably, the front of a tinsel S reciprocation extension cell piece 31 in two adjacent cell pieces and another electricity Between the back side of pond sheet 31, and by tinsel S by connecting material layer 3121 and the front pair grid line 312A of a cell piece Weld and tinsel be connected with the backplate on the back side of another cell piece 31, to form cell piece array.

Wherein connecting material layer can be weld layer or conducting resinl, and weld layer can be low-melting alloy.

Upper cover plate 10, front adhesive film 20, cell piece array 30, back side adhesive film 40 and backboard 50 are sequentially stacked, and Make back side adhesive film 40 faced by the back side of front adhesive film 20, cell piece 31 faced by the front of cell piece 31, then carry out layer Pressure obtains solar module 100.

The preparation method of the solar module 100 according to the embodiment of the present application includes first preparing cell piece array 30, so After be sequentially stacked upper cover plate 10, front adhesive film 20, cell piece array 30, back side adhesive film 40 and backboard 50, the most laggard Row lamination obtains solar module 100.It is understood that the preparation of solar module 100 also includes other Step, such as with the space between sealant sealing upper cover plate 10 and backboard 50, and utilize U-frame that said elements is tight Gu together, this it is known to those skilled in the art that, is not detailed herein.

The preparation of solaode chip arrays 30 includes tinsel reciprocation extension between the surface of cell piece 31 and with described The surface of cell piece 31 is electrically connected to form many conductor wires, and the most adjacent cell piece 31 is by described many conductor wires even Connect and form cell piece array 30.

Specifically, as it is shown in fig. 7, in a tensioned state, by an one metal wire reciprocation extension 12 times.Then, such as Fig. 8 institute Show, prepare the first cell piece 31A and the second cell piece 31B.It follows that as it is shown in figure 9, by the first cell piece 31A's Front is connected with tinsel and is connected with tinsel at the back side of the second cell piece 31B, is consequently formed cell piece array 30, figure Two cell pieces 31 are shown, as it has been described above, when cell piece array 30 has multiple cell piece 31, utilize reciprocal in 9 The back side in the front of one cell piece 31 with another adjacent cell piece 31 is connected by the tinsel extended, will an electricity The secondary grid line of pond sheet 31 is connected with the back electrode tinsel of another cell piece 31.Tinsel is by laying respectively at this root silk Reciprocation extension under two clip tensionings of two ends.In the embodiment shown in fig. 9, adjacent cell sheet is one another in series, as Upper described, as required, adjacent cell sheet can be connected in parallel to each other by tinsel.

By the cell piece array 30 prepared and upper cover plate 10, front adhesive film 20, back side adhesive film 40 and backboard 50 Be sequentially stacked, and make the front of described cell piece 31 in the face of described front adhesive film 20, described cell piece 31 the back side faced by Back side adhesive film 40, then carries out lamination and obtains solar module 100.It is understood that tinsel and cell piece 31 can bond or weld, and tinsel can be carried out with the connection of cell piece 31 in lamination process, it is of course also possible to first Connect, be laminated afterwards.

Below in conjunction with concrete example surface according to the solar module of the embodiment of the present application.

Example 1

Example 1 is for the example of the solar module 100 that the application is described and preparation method thereof.

(1) tinsel is prepared

Taking copper free wire, wherein, the cross-sectional area of copper wire is 0.04mm²。

(2) solar module 100 is prepared

The POE adhesive film (melt temperature is 65 DEG C) of a size of 1630 × 980 × 0.5mm is provided, and size is correspondingly provided It it is the polycrystalline silicon battery plate 31 of the glass plate of 1633 × 985 × 3mm and a size of 156 × 156 × 0.21mm.Cell piece 31 Having 91 secondary grid lines (material is silver, and width is 60 microns, and thickness is 9 microns), every secondary grid line is substantially in longitudinal direction On to run through the distance between cell piece 31, and adjacent pair grid line be 1.7mm, needed on secondary grid line by the method for silk screen printing The position to be connected with conductor wire arranges one layer of Sn40%-Bi55%-Pb5% alloy layer of paste, and the thickness of alloy layer of paste is 10 microns, Width is 60 microns, a length of 0.4mm.The back side of cell piece 31 has 5 back electrodes, and (material is stannum, and width is 1.5 Millimeter, thickness is 10 microns), every back electrode runs through cell piece 31 the most in the vertical, and adjacent two back electrodes it Between distance be 31mm.

Cell piece 31 is arranged with a matrix type, and between two adjacent cell pieces 31, makes tinsel at an electricity At the state reciprocation extension of tension between front and the back side of another cell piece of pond sheet 31, tinsel is by laying respectively at this Reciprocation extension under two clip tensionings of two ends of root silk.Thus form 15 parallel conductor wires, and by a cell piece The secondary grid line of 31 welds with conductor wire, is welded with conductor wire by the back electrode of another cell piece 31, and welding temperature is 160 DEG C, And the distance between the adjacent conductive line being parallel to each other is 9.9mm.Then, by upper glass plates, upper POE adhesive film, with square Formation formula is arranged and stacks the most successively with multiple cell pieces of welded wire, lower POE adhesive film and lower glass plate, Wherein, make the sensitive surface of cell piece 31 in the face of front adhesive film 20, make back side adhesive film 40 faced by the back side of cell piece 31, It is subsequently placed in laminating machine and is laminated, thus prepare solar module A1.

Example 2

Example 2 is for the example of the solar module that the application is described and preparation method thereof.

(1) tinsel is prepared

Taking copper free wire, the cross-sectional area of copper wire is 0.03mm²。

(2) solar module is prepared

There is provided the EVA adhesive film layer (melt temperature is 60 DEG C) of a size of 1630 × 980 × 0.5mm, it is provided that a size of The glass plate of 1633 × 985 × 3mm and the polycrystalline silicon battery plate 31 of a size of 156 × 156 × 0.21mm.Being subject to of cell piece 31 Bright finish is provided with 91 secondary grid lines (material is silver, and width is 60 microns, and thickness is 9 microns), and every secondary grid line is substantially The distance run through in the vertical between cell piece 31, and adjacent two secondary grid lines is 1.7mm, and the back side of cell piece 31 is provided with Article 5, back electrode (material is stannum, and width is 1.5 millimeters, and thickness is 10 microns), and every back electrode is substantially vertical The distance extended upward through between cell piece 31, and adjacent two back electrodes is 31mm.

Cell piece 31 is arranged with a matrix type, needs to be connected with conductor wire on secondary grid line by the method for silk screen printing Position arranges one layer of epoxide resin conductive adhesive, and the thickness of the epoxide resin conductive adhesive laid is 5 microns, and width is 30 microns, A length of 0.6mm, and between two adjacent cell pieces 31, make tinsel the front of a cell piece 31 and another At the state reciprocation extension of tension between the back side of individual cell piece, thus form 20 parallel conductor wires, and by a battery The secondary grid line of sheet 31 is bondd by conducting resinl with conductor wire, is bondd with conductor wire by the back electrode of another cell piece 31, and Distance between the adjacent conductive line being parallel to each other is 7mm.Then, by upper glass plates, upper POE adhesive film, with rectangular Formula is arranged and stacks the most successively with multiple cell pieces of welded wire, lower POE adhesive film and lower glass plate, wherein, Make the sensitive surface of cell piece 31 in the face of front adhesive film, make the back side of cell piece 31 in the face of back side adhesive film, be subsequently placed into layer Press is laminated, thus prepares solar module A2.

Example 3

Example 3 is with the difference with example 1:

Cell piece 31 is arranged with a matrix type, and between two adjacent cell pieces 31, uses the mode of wire drawing, By the clip tensioning by every one metal wire end of 15 tinsels parallel to each other, being flattened by cell piece, the tension force of clip is 2N, need to arrange one layer with the position of wire contact by silk screen printing by the secondary grid line in the front of cell piece 31 Sn40%-Bi55%-Pb5% alloy-layer, the thickness of alloy-layer is 15 microns, and width is 100 microns, a length of 0.8mm, will These each of 15 tinsels parallel to each other individually weld with the secondary grid line in the front of a cell piece 31, and and another The back electrode at the back side of cell piece welds, and the distance between the adjacent conductive line being parallel to each other is 9.9mm.Thus prepare too Sun can battery component A3.

Example 4

Example 4 is with the difference with example 1:

Cell piece 31 is arranged with a matrix type, and between two adjacent cell pieces 31, uses the mode of wire drawing, By the clip tensioning by every one metal wire end of 15 tinsels parallel to each other, being flattened by cell piece, the tension force of clip is 2N, need to arrange one layer of epoxy resin derivative with the position of wire contact by silk screen printing by the secondary grid line in the front of cell piece 31 Electricity glue, the thickness of epoxide resin conductive adhesive is 3 microns, and width is 80 microns, a length of 1mm, puts down these 15 each other Each of the tinsel of row individually welds with the secondary grid line in the front of a cell piece 31, and with the back side of another cell piece Back electrode welds, and the distance between the adjacent conductive line being parallel to each other is 9.9mm.Thus prepare solar module A4.

Comparative examples 1

Comparative examples 1 is with the difference of example 1: arranged with a matrix type by cell piece, is cascaded 15 Tinsel is pasted at transparent adhesive film layer, is pasted by tinsel on solar battery sheet, between two adjacent cell pieces, Then tinsel connects the back side of the front of a cell piece and another cell piece, by upper glass plates, upper POE adhesive film, Transparent adhesive film layer, in the matrix form arrangement and the multiple cell pieces being connected with tinsel, transparent adhesive film layer, lower POE adhesive film Stack the most successively with lower glass plate.Thus prepare solar module D1.

Example 5

Method according to example 1 prepares solar module, and the difference with example 1 is: at the sensitive surface of cell piece 31 Secondary grid line on short grid line 33 (material is silver, and width is 0.1mm) is set, this short grid line 33 is vertical with pair grid line, is used for Connect secondary grid line and the conductor wire of the edge portions of the sensitive surface of cell piece, as shown in figure 12, thus prepare solar battery group Part A5.

Example 6

Method according to example 1 prepares solar module, and the difference with example 1 is: the cell piece 31 of 10 row 6 row Between connected mode be: between two adjacent row's cell pieces, a conductor wire end from a (a >=1) arranges The sensitive surface of cell piece extends and electrically connects with the back side formation of the cell piece 31 of adjacent end portion in a+1 row, is used for realizing Connection between adjacent two row's cell pieces, and for connect the conductor wire of adjacent two row's cell pieces 31 with for being connected in this two row The conductor wire of adjacent cell sheet 31 is mutually perpendicular to arrange.So prepare solar module A6.

Test case 1

(1) whether drifted about by the tinsel in naked-eye observation method observation solar module；

(2) use single flash operation simulator that above-mentioned example and comparative examples are prepared too according to method disclosed in IEC904-1 Sun can battery component test, test condition be standard test condition (STC): light intensity be 1000W/m²；Spectrum is AM1.5； Temperature is 25 DEG C, records the photoelectric transformation efficiency of each cell piece.

Result is as shown in table 1 below.

Table 1

Wherein, fill factor, curve factor represents maximum power point power and peak power during zero internal resistance in theory of solar module The ratio of (i.e. open-circuit voltage * short circuit current), characterizes the actual power close degree to theoretical maximum power, and this value is the biggest, Illustrating that photoelectric transformation efficiency is the highest, general series resistance is little, and fill factor, curve factor is the biggest；Photoelectric transformation efficiency is that finger assembly is in standard (light intensity 1000W/m under illumination condition²), assembly converts light energy into the ratio of electric energy；Series resistance is equivalent to solar components Internal resistance, its value is the biggest, and assembly property is the poorest；Fill factor, curve factor, represents actual peak power and the theoretical maximum power of assembly Ratio, numerical value is the biggest, and assembly property is the best；Open-circuit voltage is assembly voltage under standard illumination condition, during open circuit； During short circuit current, assembly is under standard illumination condition, electric current during short circuit；Running voltage be assembly under standard illumination condition, Output voltage when working with peak power；Operating current be assembly under standard illumination condition, when working with peak power Output electric current；Power be finger assembly under standard illumination condition, the peak power that can reach.

By the result of table 1 it can be seen that the solar module of the embodiment of the present application will not occur the problem that tinsel drifts about, And of a relatively high photoelectric transformation efficiency can be obtained.

In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", Orientation or the position relationship of the instruction such as " outward ", " clockwise ", " counterclockwise " are based on orientation shown in the drawings or position relationship, It is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must have specific Orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed Or implicitly include one or more this feature.In describing the invention, " multiple " are meant that two or two Above, unless otherwise expressly limited specifically.

In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " Should be interpreted broadly Deng term, connect for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Can To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, permissible It it is the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood as the case may be Language concrete meaning in the present invention.

In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score Can include that the first and second features directly contact, it is also possible to include that the first and second features are not directly contact but logical Cross the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " on Face " include that fisrt feature directly over second feature and oblique upper, or is merely representative of fisrt feature level height higher than the Two features.Fisrt feature second feature " under ", " lower section " and " below " include that fisrt feature is special second Directly over levying and oblique upper, or it is merely representative of fisrt feature level height less than second feature.

In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ", Or specific features, structure, material or the feature that the description of " some examples " etc. means to combine this embodiment or example describes It is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is differed Surely identical embodiment or example are referred to.And, the specific features of description, structure, material or feature can be any One or more embodiments or example in combine in an appropriate manner.

Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary, Being not considered as limiting the invention, those of ordinary skill in the art is without departing from the principle of the present invention and the situation of objective Under above-described embodiment can be changed within the scope of the invention, revise, replace and modification.

Claims

1. a cell piece array, it is characterised in that include multiple cell piece and the conductor wire being made up of tinsel, any 2 Individual adjacent cell piece is connected by described conductor wire, and described conductor wire is connected with the secondary grid line in the front of described cell piece, institute State and be provided with connecting material layer in the position being connected with described conductor wire on secondary grid line.

Solaode chip arrays the most according to claim 1, it is characterised in that it is characterized in that, described connection material The bed of material is weld layer or conducting resinl.

Solaode chip arrays the most according to claim 2, it is characterised in that described weld layer is alloy-layer.

Solaode chip arrays the most according to claim 3, it is characterised in that described weld layer contains Sn, Bi And at least one metal in Cu, In, Ag, Sb, Pb and Zn.

5. according to the solaode chip arrays described in claim 3 or 4, it is characterised in that the fusing point of described alloy-layer is 100-220℃。

Solaode chip arrays the most according to claim 2, it is characterised in that the thickness of described weld layer is 1-20 Micron.

Solaode chip arrays the most according to claim 6, it is characterised in that the thickness of described weld layer is 4-10 Micron.

Solaode chip arrays the most according to claim 2, it is characterised in that the width of described weld layer is 10-300 Micron.

Solaode chip arrays the most according to claim 8, it is characterised in that the width of described weld layer is 30-120 Micron.

Solaode chip arrays the most according to claim 2, it is characterised in that described weld layer a length of 0.1-2mm。

11. solaode chip arrays according to claim 10, it is characterised in that described weld layer a length of 0.25-1mm。

12. solaode chip arrays according to claim 4, it is characterised in that in described alloy, with this conjunction On the basis of the gross weight of gold, the content of Bi is 15-60 weight %, and the content of Sn is 30-75 weight %, and the content of Cu is 0-20 Weight %, the content of In is 0-40 weight %, and the content of Ag is 0-3 weight %, and the content of Sb is 0-20 weight %, Pb's Content is 0-10 weight %, and the content of Zn is 0-20 weight %.

13. solaode chip arrays according to claim 8, it is characterised in that described alloy is selected from At least one in 50%Sn-48%Bi-1.5%Ag-0.5%Cu, 58%Bi-42%Sn and 65%Sn-20%Bi-10%Pb-5%Zn.

14. solaode chip arrays according to claim 1, it is characterised in that by gold between adjacent cell sheet Belong to silk to be connected, the surface of at least described tinsel cell piece in adjacent cell sheet and the table of another cell piece Between face, reciprocation extension is to form multiple described conductor wires, and described conductor wire is by described connecting material layer and described secondary grid line phase Even.

15. solaode chip arrays according to claim 14, it is characterised in that described tinsel is in one Reciprocation extension between front and the back side of another cell piece described of cell piece.

16. solaode chip arrays according to claim 15, it is characterised in that on the back side of another cell piece Being provided with back electrode, described tinsel is at the composition back side, the back side conductor wire of another cell piece, and described back side conductor wire is with described Back electrode is connected.

17. solaode chip arrays according to claim 14, it is characterised in that described tinsel is in one Reciprocation extension 10-60 time between front and the back side of another cell piece described of cell piece.

18. solaode chip arrays according to claim 14, it is characterised in that between adjacent two conductor wires Spacing is 2.5-15mm.

19. solaode chip arrays according to claim 14, it is characterised in that adjacent two conductor wires form U Shape or v-shaped structure.

20. solaode chip arrays according to claim 14, it is characterised in that described cell piece is arranged into n × m Matrix form, wherein n is columns, and m is row,

In same row's cell piece, described tinsel reciprocation extension is at the surface of a cell piece and another adjacent cell piece Between surface, in two adjacent row's cell pieces, the surface of a described tinsel reciprocation extension cell piece in a arranges And between the surface of a cell piece in a+1 row, and m-1 >=a >=1.

21. solaode chip arrays according to claim 20, it is characterised in that in adjacent two row's cell pieces, Described tinsel reciprocation extension is in the surface of the cell piece of the end being positioned at a row and the end being positioned at a+1 row Cell piece surface between, an end of an end and the described a+1 row of described a row is positioned at described matrix The same side.

22. solaode chip arrays according to claim 20, it is characterised in that in same row's cell piece, institute State tinsel reciprocation extension between the front of a cell piece with the back side of another adjacent cell piece,

In two adjacent row's cell pieces, described tinsel reciprocation extension is just being positioned at the cell piece of the end that a arranges Face and a+1 row end a cell piece the back side between, with adjacent two row's cell pieces of connecting.

23. according to the solaode chip arrays according to any one of claim 14-22, it is characterised in that reciprocation extension Tinsel between the adjacent cell sheet of same row is one, and the tinsel that reciprocation extension is between the cell piece of adjacent row It it is one.

24. solaode chip arrays according to claim 14, it is characterised in that described tinsel is one.

25. according to the solaode chip arrays according to any one of claim 14-24, it is characterised in that described secondary grid The width of line is 40-80 micron, and thickness is 5-20 micron, and described secondary grid line is 50-120 bar, and adjacent two secondary grid lines Spacing be 0.5-3mm.

26. according to the solaode chip arrays according to any one of claim 14-25, it is characterised in that described metal Silk is copper wire.

27. according to the solaode chip arrays according to any one of claim 14-26, it is characterised in that described metal Silk is connected with described secondary grid line in a tensioned state.

28. a solar module, it is characterised in that the upper cover plate that includes being sequentially stacked, front adhesive film, battery Chip arrays, back side adhesive film and backboard, described cell piece array is the solaode according to any one of claim 1-27 Chip arrays.

The preparation method of 29. 1 kinds of solar modules, it is characterised in that including:

Adjacent cell piece is connected with the conductor wire being made up of tinsel thus multiple cell pieces is formed cell piece array, by institute State a plurality of conductor wire to be connected with the secondary grid line in the front of cell piece, in the position being connected with described conductor wire on wherein said secondary grid line Install connecting material layer；

Upper cover plate, front adhesive film, described cell piece array, back side adhesive film and backboard are stacked successively, and makes cell piece Front in the face of front adhesive film, the back side of cell piece, in the face of back side adhesive film, then carries out lamination and obtains described solar-electricity Pond assembly.

30. methods according to claim 29, it is characterised in that described connecting material layer is weld layer or conducting resinl.

31. methods according to claim 30, it is characterised in that wherein said tinsel reciprocation extension is adjacent two Between front and the back side of another cell piece of a cell piece in individual cell piece, and by described tinsel by described weldering Connect layer to weld with the secondary grid line on the front of one cell piece and by the back side of described tinsel Yu another cell piece described On backplate be connected.

32. methods according to claim 29, it is characterised in that described tinsel reciprocation extension in a tensioned state.