CN106206834A

CN106206834A - The preparation method of solar module

Info

Publication number: CN106206834A
Application number: CN201510219436.4A
Authority: CN
Inventors: 赵志强; 王立国; 田野; 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; CN106206819A; CN106206766A; CN106206807A; CN106206763A; CN106206816B

Abstract

This application discloses the preparation method of a kind of solar module, including by high-frequency welding by the conductor wire being made up of tinsel and welding of battery film；By upper cover plate, front adhesive film, it is welded with the cell piece of conductor wire, back side adhesive film and backboard and is sequentially stacked, be then laminated, obtain solar module.The preparation method of the solar module according to the embodiment of the present application, the method using high-frequency welding realizes welding of conductor wire and cell piece, realize the assembling of cover plate, front adhesive film, cell piece, back side adhesive film and backboard by the method for lamination again and obtain solar module, the method can realize welding of conductor wire and cell piece, and can be prevented effectively from and rosin joint occurs, prevent conductor wire from drifting about in lamination process, the method simple possible, low cost, and the solar module photoelectric transformation efficiency prepared is high.

Description

The preparation method of solar module

Technical field

The application relates to area of solar cell, more particularly to the preparation method of solar module.

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, cell piece includes cell piece body and the main gate line being located on cell piece body front and secondary grid line, main gate line and pair Grid line covers the part in the front of cell piece body, thus can block a part of sunlight, impinges upon on main gate line and secondary grid line Solar energy cannot be transformed into electric energy, accordingly, it would be desirable to main grid and secondary grid are the thinnest more good.But, main gate line and secondary grid line Effect is to conduct electric current, and from the point of view of resistivity, main gate line and secondary grid line more detailed rules and regulations conduction cross-sectional area are the least, resistance Lose the biggest.Therefore main gate line and secondary grid line design need to obtain balance, cost to be considered between shading and conduction.

Traditional main grid in solar module mostly is three main grid structures.For the cell piece of three main grids, the weldering of main gate line Termination process generally uses the contact type welding method that similar flatiron welds.Current solar module trends towards to many main grids Structure direction develops, and so can shorten the distance of secondary grid line and main gate line so that the series resistance of cell piece reduces, thus Be conducive to improving power generation performance.But, for many main grids structure, owing to solder joint is many, positioning difficulty is big, thus greatly Improve greatly the difficulty of main gate line welding.

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.It addition, because the program is to be glued by tinsel by tack coat Tie on hyaline membrane with fixing tinsel, but in the lamination process of assembly, tack coat still can occur a certain degree of soft Change, still there is the situation of tinsel drift.

Correlation technique also proposed copper cash is set in the glued membrane of solar module as main gate line, by the layer of assembly The existing main gate line of compacting and the connection of cell piece, but, owing to the fusing point of adhesive film is less than temperature during component lamination, during lamination The tinsel being arranged in glued membrane can drift about, and the photoelectric transformation efficiency ultimately resulting in solar module reduces.

Correlation technique also refer to first formed by the way of infra-red radiation with cell piece by many parallel tinsels be electrically connected Connecing, but this technique realizes difficulty greatly, welding cost is high.

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 the preparation method of a kind of dereliction grid solar cell, the sun without main grid that this preparation method prepares Can battery without arranging main gate line on cell piece, without welding, reduce cost, and can commercialization, preparation letter Single easily realization, particularly low cost, equipment is simple, it is possible to batch production, and electricity conversion is high.

The preparation method of the solar module according to the embodiment of the present application, including: will be by tinsel structure by high-frequency welding The conductor wire become and welding of battery film；By upper cover plate, front adhesive film, it is welded with the cell piece of conductor wire, back side adhesive film It is sequentially stacked with backboard, is then laminated, obtain solar module.

The preparation method of the solar module according to the embodiment of the present application, uses the method for high-frequency welding to realize conductor wire With welding of cell piece, then with lamination method realize cover plate, front adhesive film, cell piece, back side adhesive film and backboard Assembling obtains solar module, and the method can realize welding of conductor wire and cell piece, and can be prevented effectively from out Existing rosin joint, prevents conductor wire from drifting about in lamination process, the method simple possible, low cost, and the sun prepared Can battery component photoelectric transformation efficiency height.

Accompanying drawing explanation

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

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

Fig. 3 is the horizontal 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 schematic diagram of the preparation process of the solar module according to one embodiment of the application.

Figure 14 is another schematic diagram of the preparation process of the solar module according to one embodiment of the application.

Figure 15 is the schematic diagram of the preparation process of the solar module according to another embodiment of the application.

Figure 16 is another schematic diagram of the preparation process of the solar module according to another 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 32B；Cell piece matrix 311；Secondary grid Line 312；Front pair grid line 312A；Back side pair grid line 312B；Edge pair grid line 3121；Middle secondary grid line 3122；Back of the body electricity Field 313；Back electrode 314；

Conductor wire 32；Front side conductive line 32A；Back side conductor wire 32B；Tinsel body 321；Connecting material layer 322；

Back side adhesive film 40；

Lower cover 50；

Pressing plate 70；Briquetting 71；Coil 80.

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 battery body 31, back of the body electric field 313 is referred to as the back of the body electric field of battery body 31 313, 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.

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.

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.

Below with reference to the accompanying drawings the preparation method of the solar module according to the embodiment of the present application is specifically described.

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

By high-frequency welding, the conductor wire 32 being made up of tinsel is welded with cell piece 31.

By upper cover plate 10, front adhesive film 20, it is welded with the cell piece 31 of conductor wire 32, back side adhesive film 40 and backboard 50 are sequentially stacked, and are then laminated, and obtain solar module.

In other words, according to the solar module of the embodiment of the present application in the preparation, the conduction being first made up of tinsel Line 32 and cell piece 31 carry out high-frequency welding, then by upper cover plate 10, front adhesive film 20, cell piece 31, back side glue Film layer 40 and backboard 50 are sequentially stacked and are laminated, and just can get solar module 100.

The method specifically describing the high-frequency welding according to the application below in conjunction with the accompanying drawings.

Specifically, as shown in Figure 13 and Figure 14, the operating process of a kind of embodiment of high-frequency welding may include that and will lead Electric wire 32 is arranged on cell piece 31 as requested, and is placed between upper and lower two block pressur plates 70, and pressing plate above 70 be provided above briquetting 71, then coil 80 is centered around the periphery of cell piece 31, then utilizes high frequency electric source at coil Produce high frequency electric in 80, thus on the cell piece 31 of coil 80, conductor wire 32, producing faradic current, and pass through This faradic current heating cell piece 31 and conductor wire 32, and then cell piece 31 and conductor wire 32 are welded together.

As shown in Figure 15 and Figure 16, the operating process of the another embodiment of high-frequency welding may include that conductor wire 32 It is arranged in as requested on cell piece 31, and is placed between upper and lower two block pressur plates 70, and the top of pressing plate 70 above Briquetting 71 is set, then coil 80 is arranged in the side of cell piece 31, then utilize high frequency electric source in coil 80 Produce high frequency electric, thus on the cell piece 31 of coil, conductor wire 32, produce faradic current, and by this sensing Electric current heating cell piece 31 and conductor wire 32, and then cell piece 31 and conductor wire 32 are welded together.

In the first embodiment of above-mentioned high-frequency welding, the operating process that solar module 100 is specifically prepared can To include: upper cover plate 10, front adhesive film 20, cell piece 31, back side adhesive film 40 and backboard 50 are depended on from top to bottom Secondary stacked, conductor wire 32 is arranged on cell piece 31 as requested, and is placed between upper and lower two block pressur plates 70, and Pressing plate 70 above be provided above briquetting 71, then coil 80 is centered around the periphery of cell piece 31, then utilizes height Frequency power produces high frequency electric in coil 80, thus is producing sense on the cell piece 31 of coil 80, conductor wire 32 Induced current, and by this faradic current heating cell piece 31 and conductor wire 32, and then cell piece 31 and conductor wire 32 are welded It is connected together, utilizes this faradic current heating cell piece 31, adhesive film (to include front adhesive film 20 and back side glued membrane simultaneously Layer 40) and cover plate (including upper cover plate 10 and backboard 50), and be laminated by briquetting 71, obtain solar battery group Part 100.

In the second embodiment of above-mentioned high-frequency welding, the operating process that solar module 100 is specifically prepared can To include: upper cover plate 10, front adhesive film 20, cell piece 31, back side adhesive film 40 and backboard 50 are depended on from top to bottom Secondary stacked, conductor wire 32 is arranged on cell piece 31 as requested, and is placed between upper and lower two block pressur plates 70, and Pressing plate 70 above be provided above briquetting 71, then coil 80 is arranged on the side of cell piece 31, then utilizes height Frequency power produces high frequency electric in coil 80, thus is producing sense on the cell piece 31 of coil 80, conductor wire 32 Induced current, and by this faradic current heating cell piece 31 and conductor wire 32, and then cell piece 31 and conductor wire 32 are welded It is connected together, utilizes this faradic current heating cell piece 31, adhesive film (to include front adhesive film 20 and back side glued membrane simultaneously Layer 40) and cover plate (including upper cover plate 10 and backboard 50), and be laminated by briquetting 71, obtain solar battery group Part 100.

Thus, according to the preparation method of the solar module of the embodiment of the present application, the method for high-frequency welding is used to realize Conductor wire welds with cell piece, then with lamination method realize cover plate, front adhesive film, cell piece, back side adhesive film and The assembling of backboard obtains solar module, and the method can realize welding of conductor wire and cell piece, and can be effective Avoid the occurrence of rosin joint, prevent conductor wire from drifting about in lamination process, the method simple possible, low cost, and prepare Solar module photoelectric transformation efficiency high.

An embodiment according to the application, conductor wire 32 welds before being laminated or while lamination with cell piece 31 Carry out.Thus, conductor wire 32 is more flexible with the assembling process of cell piece 31, prepares more convenient.

In this application, cell piece 31 is at least two, conductor wire 32 reciprocation extension electricity in adjacent cell sheet 31 Between surface and the surface of another cell piece 31 of pond sheet 31.

It is to say, in some detailed description of the invention of the application, cell piece 31 can be multiple to constitute cell piece array 30, be connected by conductor wire 32 between adjacent cell sheet 31, conductor wire 32 reciprocation extension in adjacent cell sheet 31 one Between surface and the surface of another cell piece 31 of individual cell piece 31.High frequency is passed through between conductor wire 32 and cell piece 31 It is weldingly connected.

Specifically, multiple cell piece 31 is included according to the solaode chip arrays 30 of the embodiment of the present application.Adjacent cell sheet It is connected by many conductor wires 32 between 31.Conductor wire 32 is made up of tinsel S, and tinsel S passes through with cell piece 31 High-frequency welding forms electrical connection, and tinsel S reciprocation extension is between the surface of adjacent cell sheet 31.

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 adjacent cell sheet 31 " should broadly understood, such as, Tinsel S can be with the table on the surface of a reciprocation extension cell piece 31 in adjacent cell sheet 31 Yu another cell piece 31 Between face, tinsel S can also extend through intermediate cell sheet 31 table of predetermined quantity from the surface of first cell piece 31 Face, to the surface of last cell piece 31, then returns from the surface of last cell piece 31 and extends through described pre- The surface of the intermediate cell sheet 31 of determined number, 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 cell piece 31 On, in the case, tinsel S constitutes the front side conductive line 32A of cell piece, and alternatively, tinsel S reciprocation extension exists On the front of cell piece 31 and different tinsel S reciprocation extension is on the back side of cell piece 31, in the case, extend Tinsel S on cell piece 31 front constitutes front side conductive line 32A, extends in the tinsel S at the back side of cell piece 31 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 31 is by the tinsel of reciprocation extension S is constituted, and is connected by conductor wire 32 between adjacent cell sheet 31, and therefore, the conductor wire 32 of cell piece is without using Expensive silver slurry, and manufacturing process is simple, it is not necessary to use welding to connect the pair of cell piece, tinsel S and cell piece Grid line 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 conductor wire 32, and, the quantity of conductor wire 32 Can 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.

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

It is further to note that in this application, conductor wire 32 can be by reciprocation extension between the surface of adjacent cell sheet Tinsel S formed, it is also possible to formed by multiple tinsel spaced-apart relation parallel to each other and independent of each other.By each other Independent multiple tinsels are spaced the technical scheme of the main gate line forming traditional structure It should be understood that be therefore not described in detail.

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 31 of solaode chip arrays 30, in other words, show Two cell pieces 31 that the conductor wire 32 by being made up of is connected with each other are gone out 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 back side conductor wire 32B, tinsel S of the front side conductive line 32A and the second cell piece 31B of the first cell piece 31A with The secondary grid line of the first cell piece 31A forms electrical connection by high-frequency welding, and with the back electrode of the second cell piece 31B by high Frequency welding forms electrical connection.

In certain embodiments, tinsel reciprocation extension 10-60 time between the first cell piece 31A and the second cell piece 31B To form 20-120 root conductor wire, the radical of conductor wire can also be 10-60 root.Preferably, as it is shown in figure 1, tinsel Reciprocation extension 12 times is to form 24 conductor wires 32, and tinsel is single, in other words, and single metal wire reciprocation extension Forming 24 conductor wires 12 times, the spacing between adjacent conductive line can be 2.5 millimeters-15 millimeters.According to this embodiment, Compared with the conductor wire of conventional batteries sheet, quantity increases, thus reduces the electric current distance from secondary grid line to conductor wire, reduces Resistance, improves electricity conversion.In the embodiment shown in fig. 1, adjacent conductive line forms U-shaped structure, thus It is easy to coiling wiry.Alternatively, the application is not limited to this, and such as, adjacent conductive line can also form v-shaped structure.

Wherein 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 include tinsel body 321 and the connecting material layer of tinsel body 321 external sheath 322, i.e. tinsel S can also be to include tinsel body 321 and be coated on the connecting material layer of tinsel body 321 outer layer 322, in embodiments herein, if without specified otherwise, tinsel refers to that reciprocation extension is formed on cell piece 31 and leads The tinsel S of electric wire 32.Connecting material layer 322 herein is weld layer, and weld layer can be alloy-layer.

In some embodiments it may be preferred that tinsel body 321 is copper wire, certainly, tinsel S can also be copper wire, I.e. tinsel S is not coated with connecting material layer 322, but the application is not limited to this, and such as tinsel body 321 can also be Aluminium wire.Preferably, tinsel body 321S has circular cross section, and thus, more sunlight can be irradiated to cell piece On matrix, improve photoelectric transformation efficiency further.

In some detailed description of the invention of the application, on tinsel body 321, the connecting material layer of cladding is weld layer, institute Stating weld layer is alloy-layer, and described alloy-layer contains Sn and is selected from least one in Bi, In, Ag, Sb, Pb and Zn. Preferably, alloy-layer contains Sn, Bi and is selected from least one in In, Ag, Sb, Pb and Zn.

In the alloy, on the basis of the gross weight of this alloy, the content of Bi is 15-60 weight %, and the content of Sn is 30-75 Weight %, the content of Cu is 0-20 weight %, and the content of In is 0-40 weight %, and the content of Ag is 0-3 weight %, Sb's Content is 0-20 weight %, and the content of Pb is 0-10 weight %, and the content of Zn is 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 in 65%Sn-20%Bi-10%Pb-5%Zn.

Alternatively, the thickness of connecting material layer 322 is 1-100 micron, and the cross-sectional area of tinsel body 321 is 0.01-0.5 Square millimeter.

In other detailed description of the invention of the application, the preparation method of solar module is additionally included in passes through ratio-frequency welding Connect before the conductor wire being made up of tinsel and welding of battery film, apply in the position that conductor wire 32 is connected with cell piece 31 Weld layer.

Weld layer can be arranged on cell piece 31, it is also possible to is arranged on tinsel body 321, it is preferred that weld layer sets Put on tinsel body 321.It is to say, in this application, tinsel body 321 is coated with weld layer, i.e. connects Connect material layer 322 for weld layer.Preferably, the thickness of weld layer is 0.02-0.5 with the diameter ratio of tinsel body 321: 1。

Weld layer can be low-melting-point metal or alloy.Ashbury metal can be conventional ashbury metal, such as, can be stannum and be selected from The alloy of at least one metal in Bi, Pb, Ag and Cu, specifically, such as SnBi, SnPb, SnBiCu, SnPbAg Deng.So can avoid, between conductor wire 32 and the secondary grid line 312 of cell piece and/or back electrode 314, rosin joint occurs so that The solar module of final preparation has of a relatively high electricity conversion.

In some embodiments it may be preferred that before tinsel with cell piece high-frequency welding, tinsel is the most past Multiple extension, will stretch by tinsel, after being connected with the secondary grid line and back electrode of cell piece, can discharge wiry Clamp force, avoids the conductor wire drift when preparing solar module to affect photoelectric transformation efficiency the most further.

In some detailed description of the invention of the application, the width of secondary grid line 312 is 40-80 micron, and thickness is 5-20 micron, Secondary grid line 312 is 50-120 bar, and the spacing of adjacent two secondary grid lines 312 is 0.5-3mm.Thus, this pair grid line 312 More reasonable structure, there is bigger Shouguang area, photoelectric transformation efficiency is higher.

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 32B of the front side conductive line 32A and the second cell piece 31B of pond sheet 31A, in the case, the first battery Sheet 31A and the second cell piece 31B is connected in parallel to each other, it is, of course, understood that preferably, and the back of the body of the first cell piece 31A The back electrode of electrode and the second 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.

Figure 12 shows the schematic diagram of the cell piece array of the another embodiment according to the application.As shown in figure 12, cell piece The front of 31 has short grid line 33 and secondary grid line 312, and described secondary grid line 312 includes the middle secondary grid intersected with described conductor wire Line and the edge pair grid line not intersected with described conductor wire, described short grid line 33 is connected with described edge pair grid line, and described short Grid line grid line secondary with in the middle of described conductor wire or at least one is connected.Preferably, short grid line 33 is perpendicular to secondary grid line 312.

Thus, by arranging short grid line 33 on the secondary grid line 312 of the edge portions of cell piece 31 sensitive surface, so can keep away Exempt from the secondary grid line 312 of the edge portions owing to being unable to reach cell piece 31 during arranging in conductor wire 32 coiling and cause Portion of electrical current waste such that it is able to improve further the electricity conversion of solar module 100.

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.

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.

Table by the surface of a tinsel reciprocation extension cell piece 31 in adjacent cell sheet 31 Yu another cell piece 31 Form many conductor wires 32 between face, many conductor wires 32 welded with the secondary grid line 312 on the front of cell piece 31, Connect adjacent cell piece 31 from there through conductor wire 32 and obtain cell piece array.

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 gold Belong to two clip reciprocation extensions in a tensioned state of two ends of silk.

In the embodiment shown in fig. 9, adjacent cell sheet is one another in series, as it has been described above, as required, adjacent cell sheet can To 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 welding, tinsel can be carried out with the connection of cell piece 31 in lamination process, it is of course also possible to first connect, rear layer Pressure.

The solar module 100 of the application is described below in conjunction with concrete example.

Example 1

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

(1) tinsel S is prepared

The surface of copper wire is adhered to one layer of Sn40%-Bi55%-Pb5% alloy-layer (fusing point is about 125 DEG C), wherein, copper wire Cross-sectional area is 0.04mm², the thickness of alloy-layer is 16 microns, thus prepares tinsel S.

(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 is the glass plate of 1633 × 985 × 3mm and polycrystalline silicon battery plate 31 that 60 chip sizes are 156 × 156 × 0.21mm.Battery Sheet 31 has 91 secondary grid lines (material is silver, and width is 60 microns, and thickness is 9 microns), and every secondary grid line is substantially Running through the distance between cell piece 31, and adjacent pair grid line in the vertical is 1.7mm, and the back side of cell piece 31 has 5 back ofs the body Electrode (material is stannum, and width is 1.5 millimeters, and thickness is 10 microns), every back electrode runs through electricity the most in the vertical Distance between pond sheet 31, and adjacent two back electrodes is 31mm.

60 cell pieces 31 are arranged with a matrix type (6 rows 10 arrange), two cell pieces 31 adjacent in same row Between, make an one metal wire reciprocal in the state of tension between the front and the back side of another cell piece of a cell piece 31 Extending, tinsel is by laying respectively at reciprocation extension under two clip tensionings of these two ends of root silk, thus forms 15 and put down The conductor wire of row, 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, in the matrix form arrangement and the multiple cell pieces, lower POE adhesive film and the lower glass plate that are connected with tinsel to Under stack successively, wherein, make the sensitive surface of cell piece 31 in the face of front adhesive film 20, make the back side of cell piece 31 in the face of the back of the body Face adhesive film 40, conductor wire 32 is connected by high-frequency welding with cell piece 31, is subsequently placed in laminating machine and is laminated, from And prepare solar module A1.

Example 2

(1) tinsel S is prepared

The surface of copper wire is adhered to one layer of Sn40%-Bi55%-Pb5% alloy-layer (fusing point is 125 DEG C), wherein, the horizontal stroke of copper wire Sectional area is 0.04mm², the thickness of alloy-layer is 16 microns, thus prepares tinsel S.

(2) solar module 100 is prepared

60 cell pieces 31 are arranged with a matrix type (6 rows 10 arrange), two cell pieces 31 adjacent in same row Between, make an one metal wire reciprocal in the state of tension between the front and the back side of another cell piece of a cell piece 31 Extending, tinsel is by laying respectively at reciprocation extension under two clip tensionings of these two ends of root silk, thus forms 15 and put down The conductor wire of row, and the secondary grid line of a cell piece 31 is welded by ratio-frequency welding mode with conductor wire, by another cell piece The back electrode of 31 is welded by ratio-frequency welding mode with conductor wire, and the distance between the adjacent conductive line being parallel to each other is 9.9mm, Thus by a row for 10 cell piece series connection, this kind of battery strings of 6 row is connected into array by busbar.Then, will Upper glass plates, upper POE adhesive film, in the matrix form arrangement and with multiple cell pieces of welded wire, lower POE adhesive film Stack the most successively with lower glass plate, wherein, make the sensitive surface of cell piece 31 in the face of front adhesive film 20, front glue Film layer 20 directly contacts with conductor wire 32, makes the back side of cell piece 31 in the face of back side adhesive film 40, is subsequently placed into laminating machine In be laminated, front adhesive film 20 is filled between adjacent conductor wire 32, thus prepare solar module A2.

Comparative examples 1

The difference of comparative examples 1 and example 2 is: be weldingly connected by far infrared between conductor wire and cell piece.Thus make Obtain solar module D1.

Example 3

Method according to example 2 prepares solar module, and the difference with example 2 is: at the sensitive surface of cell piece 31 Secondary grid line 312 on short grid line 33 (material is silver, and width is 0.1mm) is set, this short grid line 33 hangs down with secondary grid line 312 Directly, for connecting secondary grid line 312 and the conductor wire 32 of the edge portions of the sensitive surface of cell piece 31, as shown in figure 12, from And prepare solar module A3.

Example 4

Method according to example 2 prepares solar module, and the difference with example 2 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 A4.

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.

Solar module	A1	D1	A2	A3	A4
						Tinsel drift phenomenon	Nothing	Seriously	Nothing	Nothing	Nothing
Photoelectric transformation efficiency	16.50%	15.30%	16.70%	17.00%	16.80%
						Series resistance/milliohm	458	515	445	433	448
Fill factor, curve factor	0.779	0.742	0.783	0.79	0.781
						Open-circuit voltage/V	37.65	37.52	37.75	37.86	37.81
Short circuit current/A	9.048	8.836	9.085	9.143	9.154
						Running voltage/V	31.15	30.32	31.34	31.76	31.69
Operating current/A	8.52	8.117	8.571	8.61	8.53
						Power/W	265.4	246.1	268.6	273.4	270.3

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. the preparation method of a solar module, it is characterised in that including:

By high-frequency welding by the conductor wire being made up of tinsel and welding of battery film；

By upper cover plate, front adhesive film, it is welded with the cell piece of conductor wire, back side adhesive film and backboard and is sequentially stacked, then It is laminated, obtains solar module.

The preparation method of solar module the most according to claim 1, it is characterised in that described conductor wire and electricity The welding of pond sheet before being laminated or is carried out while lamination.

The preparation method of solar module the most according to claim 1 and 2, it is characterised in that described cell piece For at least two, the surface of a described conductor wire reciprocation extension cell piece in adjacent cell sheet and another cell piece Between surface.

The preparation method of method solar module the most according to claim 3, it is characterised in that described conductor wire Reciprocal time is 10-60.

The preparation method of solar module the most according to claim 3, it is characterised in that described conductor wire is reciprocal Extend between front and the back side of another cell piece of a cell piece in adjacent cell sheet.

6. according to the preparation method of the solar module according to any one of claim 3-4, it is characterised in that adjacent Article two, conductor wire forms U-shaped structure or v-shaped structure.

7. according to the preparation method of the solar module according to any one of claim 1-6, it is characterised in that described Cell piece is arranged into the matrix form of n × m, and 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.

The preparation method of solar module the most according to claim 7, it is characterised in that at adjacent two row's batteries In sheet, described tinsel reciprocation extension be positioned at a row an end cell piece surface be positioned at a+1 row one Between the surface of the cell piece of individual end, an end of described a row is positioned at described with an end of described a+1 row The same side of matrix.

The preparation method of solar module the most according to claim 8, it is characterised in that at same row's cell piece In, described 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.

10. according to the preparation method of the solar module according to any one of claim 7-9, it is characterised in that past Extending in the tinsel between the adjacent cell sheet of same row again is one, and reciprocation extension is between the cell piece of adjacent row Tinsel is one.

11. according to the preparation method of the solar module according to any one of claim 1-10, it is characterised in that institute Stating tinsel is copper wire.

12. according to the preparation method of the solar module according to any one of claim 1-11, it is characterised in that institute The width stating the secondary grid line on the front of cell piece is 40-80 micron, and thickness is 5-20 micron, and described secondary grid line is 50-120 Bar, and the spacing of adjacent two secondary grid lines is 0.5-3mm.

13. according to the preparation method of the solar module according to any one of claim 1-12, it is characterised in that institute State and on tinsel, be coated with alloy-layer.

The preparation method of 14. solar modules according to claim 13, it is characterised in that described alloy-layer contains There is Sn and be selected from least one in Bi, In, Ag, Sb, Pb and Zn.

The preparation method of 15. solar modules according to claim 13, it is characterised in that described alloy-layer contains There are Sn, Bi and are selected from least one in In, Ag, Sb, Pb and Zn.

16. according to the preparation method of the solar module according to any one of claim 13-15, it is characterised in that The thickness of described alloy-layer is 1-100 micron, and the cross-sectional area of described conductor wire is 0.01-0.5 square millimeter.

The preparation method of 17. solar modules according to claim 1 and 2, it is characterised in that also include weldering Before connecing described conductor wire and described cell piece, apply weld layer in the position that described conductor wire is connected with described cell piece.

The preparation method of 18. solar modules according to claim 17, it is characterised in that described weld layer Thickness is 0.02-0.5:1 with the diameter ratio of described conductor wire.

19. according to the preparation method of the solar module according to any one of claim 1-18, it is characterised in that phase Spacing between adjacent conductor wire is 2.5-15mm.

The preparation method of 20. solar modules according to claim 1, it is characterised in that described conductor wire by Tinsel a plurality of parallel to each other and independent of each other constitutes or is made up of an one metal wire reciprocation extension.

21. according to the preparation method of the solar module according to any one of claim 1-20, it is characterised in that institute The bar number stating conductor wire is 10-60.