CN106206811A

CN106206811A - Solar module and preparation method thereof

Info

Publication number: CN106206811A
Application number: CN201510217625.8A
Authority: CN
Inventors: 赵志强; 田野; 彭汉东; 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
Anticipated expiration: 2035-04-30
Also published as: CN106206807A; CN106206819A; CN106206761A; CN106206764B; CN106206813A; CN106206761B; CN106206816A; CN106206815B; CN106206812B; CN106206817B; CN106206808B; CN106206809A; CN106206767B; CN106206814A; CN106206834A; CN106206768B; CN106206811B; CN106206812A; CN106206810B; CN106206817A

Abstract

The invention discloses a kind of solar module and preparation method thereof, solar module includes upper cover plate, front adhesive film, cell piece array, back side adhesive film and the backboard being sequentially stacked, described cell piece array includes multiple cell piece, it is connected by a plurality of conductor wire between adjacent cell sheet, article at least two, described conductor wire is formed by reciprocation extension tinsel between the surface of adjacent cell sheet, described conductor wire contacts with described cell piece, and described front adhesive film directly contacts with described conductor wire and is filled between adjacent conductor wire.According to the solar module of the application, replaced main gate line and the welding of conventional batteries sheet by the conductor wire being made up of the tinsel of reciprocation extension, reduce cost；The tinsel of reciprocation extension decreases the number of free end wiry, and when arranging tinsel, requisite space is little, is not limited by a space, and the radical of the conductor wire being made up of tinsel reciprocation extension can be greatly improved, and preparation is simple, it is possible to batch production.

Description

Solar module and preparation method thereof

Technical field

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

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.

Application content

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 without main grid 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 is without printing the silver of costliness on cell piece Main gate line, without welding, reduces cost, and can commercialization, preparation is simple easily to be realized, particularly low cost, Equipment is simple, it is possible to batch production, and electricity conversion is high.

According to the solar module of the application first aspect embodiment, including the upper cover plate being sequentially stacked, front adhesive film, Cell piece array, back side adhesive film and backboard, described cell piece array includes multiple cell piece, passes through between adjacent cell sheet A plurality of conductor wire is connected, and at least two described conductor wires are formed by reciprocation extension tinsel between the surface of adjacent cell sheet, Described conductor wire contacts with described cell piece, and described front adhesive film directly contacts with described conductor wire and is filled in adjacent leading Between electric wire.

According to the solar module of the embodiment of the present application, replaced by the conductor wire being made up of the tinsel of reciprocation extension and pass The main gate line of system cell piece and welding, reduce cost；The tinsel of reciprocation extension decreases the number of free end wiry, When arranging tinsel, requisite space is little, is not limited by a space, and the bar number of the conductor wire being made up of tinsel reciprocation extension can be big Width improves, and preparation is simple, it is possible to batch production；Front adhesive film directly contacts with conductor wire and is filled in adjacent conduction Between line, effectively conductor wire can be completely cut off with outside air, steam etc., it is to avoid the oxidation of conductor wire, can be effectively ensured Electricity conversion.

The preparation method of the solar module according to the application second aspect embodiment, including: by tinsel reciprocation extension Between the surface of cell piece and contact with the surface of described cell piece and form at least two conductor wires, adjacent cell piece leads to Cross a plurality of conductor wire to connect and form cell piece array；By upper cover plate, front adhesive film, described cell piece array, back side glue Film layer and backboard are sequentially stacked, and make the front of described cell piece in the face of described front adhesive film, front adhesive film and described conduction Line directly contacts, and makes the back side of described cell piece in the face of back side adhesive film, is then laminated, and front adhesive film is filled in phase Between adjacent conductor wire, obtain solar module.

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 wire in tension schematic diagram of comparative example 1.

Figure 14 is the bar number of conductor wire and the relation of photoelectric transformation efficiency in the solaode chip arrays according to the embodiment of the present application Curve chart.

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；Back of the body electric field 313；Back electrode 314；

Conductor wire 32 (32C)；Front side conductive line 32A；Back side conductor wire 32B；Tinsel body 321；Connecting material layer 322； Short grid line 33；Clip 34；

Back side adhesive film 40；

Lower cover 50.

Detailed description of the invention

Embodiments herein is 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 be used for explaining the application, and it is not intended that restriction to the application.

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.

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.

Specifically describe the solar module 100 according to the embodiment of the present application below in conjunction with the accompanying drawings.

As shown in Figure 1 to 11, upper cover plate 10, front glue are included according to the solar module 100 of the embodiment of the present application Film layer 20, cell piece array 30, back side adhesive film 40 and backboard 50.Cell piece array 30 includes multiple cell piece 31, Be connected by a plurality of conductor wire 32 between adjacent cell sheet 31, at least two conductor wires 32 by reciprocation extension at adjacent cell sheet Surface between tinsel S formed, conductor wire 32 contacts with cell piece 31, and front adhesive film 20 is straight with conductor wire 32 Contact and be filled between adjacent conductor wire 32.

In other words, according to the solar module 100 of the embodiment of the present application include being sequentially stacked along the vertical direction upper cover plate 10, Front adhesive film 20, cell piece array 30, back side adhesive film 40 and backboard 50, cell piece array 30 includes multiple battery Sheet 31 and a plurality of conductor wire 32 of the multiple cell pieces 31 of connection, at least two conductor wires 32 are made up of tinsel S, metal Silk S reciprocation extension is on the surface of two adjacent cell pieces 31, and the present invention does not limit to all of conductor wire by tinsel Coiling is formed, and can part be formed by tinsel coiling, it is also possible to all, reciprocation extension can be the most once, back and forth prolong The terminating point stretched the most does not limits, and starting point and ending point can be on same cell piece, it is also possible to be at different batteries On sheet, if containing around.

Conductor wire 32 electrically connects with cell piece 31, wherein, and front adhesive film 20 and the conductor wire 32 being positioned on cell piece 31 Directly contacting and be filled between adjacent conductor wire 32, front adhesive film 20 both can play the work of fixing conductor wire 32 With, by conductor wire 32 and outside air and steam isolation, thus conductor wire 32 can be avoided oxidized again, it is ensured that photoelectricity Conversion efficiency.

Thus, according to the solar module 100 of the embodiment of the present application, by leading of being made up of the tinsel S of reciprocation extension The main gate line of electric wire 32 replacement conventional batteries sheet and welding, reduce cost；The tinsel S of reciprocation extension decreases tinsel The number of the free end of S, when arranging tinsel S, requisite space is little, is not limited by a space, by tinsel S reciprocation extension structure The bar number of the conductor wire 32 become can be greatly improved, and preparation is simple, it is possible to batch production；Front adhesive film 20 and conductor wire 32 directly contact and are filled between adjacent conductor wire 32, can be effectively by conductor wire 32 and outside air, steam etc. Isolation, it is to avoid the oxidation of conductor wire 32, can be effectively ensured electricity conversion.

Wherein, front adhesive film 20 and back side adhesive film 40 can be adhesive film commonly used in the art, it is preferable that just Face adhesive film 20 and back side adhesive film 40 polyethylene octene elastomer (POE) and/or ethylene-vinyl acetate copolymer (EVA). In this application, polyethylene octene elastomer (POE) and ethylene-vinyl acetate copolymer (EVA) can use this area Conventional use of product 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 Conducting resinl 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.

Specifically describe the cell piece array 30 according to the application below in conjunction with the accompanying drawings.

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 a plurality of conductor wire 32 between 31.Conductor wire 32 is made up of tinsel S, and tinsel S is electrically connected with cell piece 31 Connecing, 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, Article two, conductor wire 32 is 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, cell piece surface is held high without printing price Expensive silver-colored main grid, and manufacturing process is simple, it is not necessary to use welding to connect the secondary grid line of cell piece, tinsel S and cell piece Easy to connect with back electrode, 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 in front, and, the quantity of conductor wire 32 can be square Just adjusting, compared with the main gate line that silver slurry is formed, the resistance of conductor wire 32 reduces, and improves photoelectric transformation efficiency.Due to Tinsel S reciprocation extension forms conductor wire, when using cell piece array 30 to manufacture solar module 100, and tinsel S is difficult to displacement, i.e. tinsel " drift " is less likely to occur, does not interferes with photoelectric transformation efficiency, further increases photoelectricity and turn Change efficiency.

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

In some detailed description of the invention of the application, a tinsel S cell piece 31 in adjacent cell sheet 31 is just Reciprocation extension between the back side of face and another cell piece 31, front adhesive film 20 and leading on the front of a cell piece 31 Electric wire 32 directly contacts and is filled between the adjacent conductive line 32 on the front of a cell piece 31, back side adhesive film 40 The adjacent of the back side directly contacting and being filled in another cell piece 31 with the conductor wire 32 at the back side of another cell piece 31 is led Between electric wire 32.

It is to say, in this application, adjacent two cell pieces 31 are connected by tinsel S-phase, and at adjacent two In cell piece 31, the front of a cell piece 31 connects with tinsel S-phase, the back side of another cell piece 31 and tinsel S It is connected.

Wherein, the front adhesive film 20 on front and tinsel S-phase cell piece 31 even and the metal in this cell piece 31 front Silk S directly contacts and is filled between adjacent conductor wire 32, the back side of the back side and tinsel S-phase cell piece 31 even Adhesive film 40 directly contacts with the tinsel S at this cell piece 31 back side and is filled between adjacent conductor wire 32 (such as figure Shown in 2).

Thus, according to the solar module 100 of the embodiment of the present application, not only front adhesive film 20 can be by part electricity The conductor wire 32 in the front of pond sheet 31 separates with the external world, and back side adhesive film 40 can also be by the back side of percentage of batteries sheet 31 Conductor wire 32 separates with the external world, may further ensure that the photoelectric transformation efficiency of solar module 100.

Alternatively, the conductor wire 32 at the back side being positioned at another cell piece 31 is electric with the back electrode 314 of another cell piece 31 Connect.

It is to say, the front of the cell piece 31 that tinsel S is in adjacent cell sheet 31 and another cell piece 31 Between the back side during reciprocation extension, tinsel S forms front side conductive line 32A in the front of a cell piece 31, and tinsel S exists The formation back side, the back side conductor wire 32B of another cell piece 31, and it is positioned at the back side conduction at this another cell piece 31 back side Line 32B is that the back electrode 314 with this another cell piece 31 back side electrically connects.Thus, it is possible to ensure that tinsel S is with another The connection effect at the back side of one cell piece 31.

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, (for convenience, solaode chip arrays includes two cell pieces Referred to herein as the first cell piece 31A, the second cell piece 31B), tinsel S reciprocation extension is in the front of the first cell piece 31A Between (sensitive surface, the upper surface in Fig. 2) and the back side of the second cell piece 31B, thus, tinsel S constitutes first The front side conductive line of cell piece 31A and the back side conductor wire of the second cell piece 31B, tinsel S and the first cell piece 31A Secondary grid line electrical connection (such as welding or bond with conducting resinl) and electrically connect with the back electrode of the second cell piece 31B.

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 bar conductor wire, it is preferable that as it is shown in figure 1, tinsel reciprocation extension 12 times is to form 24 conductions Line 32, and tinsel is single, in other words, single metal wire reciprocation extension forms 24 conductor wires, adjacent conductive 12 times Spacing between line can be 2.5 millimeters-15 millimeters.Certainly, tinsel of the present invention is not limited to single, can be many Root, it is also possible to for the independent coiling of many one metal wires.According to this embodiment, compared with the silver-colored main grid of conventional batteries sheet, quantity increases Add, thus reduce electric current from secondary grid line to the distance of conductor wire, decrease resistance, improve electricity conversion.At figure In embodiment shown in 1, adjacent conductive line forms U-shaped structure, is thus easy to coiling wiry.Alternatively, the application Being not limited to this, such as, adjacent conductive line can also form v-shaped structure.

As shown in figure 14, Figure 14 shows the relation between bar number and the photoelectric transformation efficiency of battery component of conductor wire 32, As can be seen, when the bar number of conductor wire 32 is between 20-30 bar, the photoelectric transformation efficiency of battery component is higher.

It is highly preferred that as shown in Figure 4, tinsel S includes tinsel body 321 and the connecting material layer of outer surface cladding thereof 322, connecting material layer 322 can be conductive adhesive layer or weld layer, tinsel by the weld layer of cladding and secondary grid line and/or Back electrode welds, thus, it is simple to tinsel and secondary grid line and/or the electrical connection of back electrode, it is to avoid tinsel drift in connection procedure Move and affect photoelectric transformation efficiency.Certainly, tinsel can be at the lamination of solar module with the electrical connection of battery lamellar body During carry out, it is also possible to carry out before being laminated, it is preferable that be attached before being laminated.

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.

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 S has circular cross section, and thus, more sunlight can be irradiated on cell piece matrix, Improve photoelectric transformation efficiency further.

In some embodiments it may be preferred that before tinsel contacts with cell piece, tinsel the most back and forth prolongs Stretch, will stretch by tinsel, after being connected with the secondary grid line and back electrode of cell piece, tensile force wiry can be discharged, The conductor wire drift when preparing solar module is avoided to affect photoelectric transformation efficiency the most 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.

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, all use between the 5th row and the 6th row conductor wire realize series connection, as it can be seen, tinsel can Outer for connecting other loads to extend cell piece, such as, it is alternatively possible between second row and the 3rd row, the 4th The diode being used for preventing spottiness in parallel between row and the 5th row, the connection of diode can use those skilled in the art Known technology, 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 hydraulic performance decline that causes, becomes simultaneously This is relatively low.

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.

The preparation method of the solar module 100 according to the embodiment of the present application include first by tinsel reciprocation extension at electricity Between the surface of pond sheet 31 and contact with the surface of cell piece 31 and form at least two conductor wires 32, the most adjacent battery Sheet 31 is connected by a plurality of conductor wire 32 and forms cell piece array 30.

Upper cover plate 10, front adhesive film 20, cell piece array 30, back side adhesive film 40 and backboard 50 are sequentially stacked, make The front of cell piece 31 is in the face of front adhesive film 20, and described front adhesive film 20 directly contacts with described conductor wire 32, makes The back side of cell piece 31, in the face of back side adhesive film 40, is then laminated, and front adhesive film 20 is filled in adjacent conductor wire Between 32, obtain solar module 100.

In other words, according to the solar module 100 of the application in the preparation, first by tinsel reciprocation extension adjacent Cell piece 31 surface on and contact the multiple conductor wires 32 of composition with the surface of cell piece 31, multiple cell pieces 31 are connected I.e. constitute cell piece array 30.

Then upper cover plate 10, front adhesive film 20, cell piece array 30, back side adhesive film 40 and backboard 50 are sequentially stacked, Front adhesive film 20 is made directly to contact with conductor wire 32, finally by upper cover plate 10, front adhesive film 20, cell piece array 30, back side adhesive film 40 and backboard 50 are laminated, and front adhesive film 20 is filled between adjacent conductor wire 32, i.e. The solar module 100 that available the application is above-mentioned.

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 Show two cell pieces 31 in 9, as above, when cell piece array 30 has multiple cell piece 31, utilize reciprocation extension Tinsel the back side in the front of one cell piece 31 with another adjacent cell piece 31 is connected, will a cell piece The secondary grid line of 31 is connected with the back electrode tinsel of another cell piece 31.Tinsel is by laying respectively at this root silk two Reciprocation extension under two clip tensionings of end, this tinsel has only to two clips can realize coiling, greatly reduces folder The consumption of son, saves assembly space.

In the embodiment shown in fig. 9, adjacent cell sheet is one another in series, and as above, as required, adjacent cell sheet can lead to Cross tinsel to be connected in parallel to each other.

By the cell piece array 30 prepared and upper cover plate 10, front adhesive film 20, back side adhesive film 40 and backboard 50 Being sequentially stacked, and make the front of cell piece 31 in the face of front adhesive film 20, front adhesive film 20 directly connects with conductor wire 32 Touching, the back side of cell piece 31, in the face of back side adhesive film 40, then carries out lamination and obtains solar module 100, front glue Film layer 20 is filled between adjacent conductor wire 32.It is understood that tinsel can bond or weld with cell piece 31, Tinsel can be carried out with the connection of cell piece 31 in lamination process, it is of course also possible to first connect, is laminated afterwards.

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 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

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, an one metal wire back and forth prolongs in the state of tension between the front and the back side of another cell piece of a cell piece 31 Stretching, tinsel is by laying respectively at reciprocation extension under two clip tensionings of these two ends of root silk.Thus formed 15 parallel Conductor wire, and the secondary grid line of a cell piece 31 is welded with conductor wire, by the back electrode of another cell piece 31 with lead Wire welding, welding temperature is 160 DEG C, and the distance between the adjacent conductive line being parallel to each other is 9.9mm, thus by 10 The series connection of sheet cell piece is in a row, and by busbar, this kind of battery strings of 6 row is connected into array.Then, by upper glass plates, Upper POE adhesive film, in the matrix form arrangement and multiple cell pieces, lower POE adhesive film and the lower glass plate being connected with tinsel Stack the most successively, wherein, make the sensitive surface of cell piece 31 in the face of front adhesive film 20, front adhesive film 20 with lead Electric wire 32 directly contacts, and makes the back side of cell piece 31 in the face of back side adhesive film 40, is subsequently placed in laminating machine and is laminated, Front adhesive film 20 is filled between adjacent conductor wire 32, thus prepares solar module A1.

Comparative examples 1

Comparative examples 1 is with the difference of example 1:

Cell piece 31 is arranged with a matrix type, and between two adjacent cell pieces 31, uses as shown in fig. 13 that Wire drawing mode, by clip 34 tensioning by every one metal wire end of 15 tinsels parallel to each other, flattens cell piece, The tension force of clip is 2N, by the secondary grid in independent for these each of the 15 tinsels parallel to each other front with a cell piece 31 Wire bonding, and welding with the back electrode at the back side of another cell piece, and between the adjacent conductive line 32C being parallel to each other away from From for 9.9mm (as shown in figure 13).Thus prepare solar module D1.

Comparative examples 2

Comparative examples 2 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 D2.

Example 2

Example 2 is for the example of the solar module 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 0.03mm², the thickness of alloy-layer is 10 microns, thus prepares tinsel S.

(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 that 60 chip sizes are 156 × 156 × 0.21mm.Cell piece The sensitive surface of 31 is provided with 91 secondary grid lines (material is silver, and width is 60 microns, and thickness is 9 microns), every secondary grid The distance that line runs through between cell piece 31, and adjacent two secondary grid lines the most in the vertical is 1.7mm, the back of the body of cell piece 31 Face is provided with 5 back electrodes (material is stannum, and width is 1.5 millimeters, and thickness is 10 microns), and every back electrode base The distance run through in the vertical in basis between cell piece 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 tinsel back and forth prolong in the state of tension between the front and the back side of another cell piece of a cell piece 31 Stretch, thus form 20 parallel conductor wires, and the secondary grid line of a cell piece body 31 is welded with conductor wire, will be another The back electrode of one cell piece body 31 welds with conductor wire, and welding temperature is 160 DEG C, and the adjacent conductive line being parallel to each other Between distance be 7mm, thus by a row for the series connection of 10 cell pieces, this kind of battery strings of 6 row is connected into by busbar Array.Then, by upper glass plates, upper POE adhesive film, in the matrix form arrangement and the multiple electricity with welded wire Pond sheet, lower POE adhesive film and lower glass plate stack the most successively, wherein, make the sensitive surface of cell piece 31 in the face of front Adhesive film, front adhesive film 20 directly contacts with conductor wire 32, makes back side adhesive film faced by the back side of cell piece 31, then Putting in laminating machine and be laminated, front adhesive film 20 is filled between adjacent conductor wire 32, thus prepares solar-electricity Pond assembly A2.

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 3 prepares solar module, and the difference with example 3 is: the connected mode of array For: between two adjacent row's cell pieces, the sensitive surface of the cell piece of a conductor wire end from a (a >=1) arranges In extending and arranging with a+1, the back side of the cell piece 31 of adjacent end portion is formed and electrically connects, and is used for realizing adjacent two row's cell pieces Between connection, and for connect the conductor wire of adjacent two row's cell pieces 31 with for being connected adjacent cell sheet 31 in this two row Conductor wire be 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.

Table 1

Solar module	A1	D1	D2	A2	A3	A4
							Tinsel drift phenomenon	Nothing	Slightly	Nothing	Nothing	Nothing	Nothing
Photoelectric transformation efficiency	16.5%	15.6%	15.7	16.7%	17.0%	17.2%
							Series resistance/milliohm	458	493	482	445	433	429
Fill factor, curve factor	0.779	0.759	0.756	0.783	0.790	0.794
							Open-circuit voltage/V	37.65	37.54	37.63	37.75	37.86	37.88
Short circuit current/A	9.048	8.802	8.879	9.085	9.143	9.198
							Running voltage/V	31.15	30.38	30.44	31.34	31.76	31.97
Operating current/A	8.520	8.26	8.296	8.571	8.610	8.651
							Power/W	265.4	250.9	252.5	268.6	273.4	276.6

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.

Test case 2

(1) welded wire to cell piece surface, tinsel is vertical with the secondary grid line of cell piece；

(2) cell piece being horizontally placed on the test position of tension tester, will place briquetting on cell piece, briquetting is placed in gold Belong to the both sides of silk so that during test, cell piece is not pulled up；

(3) tinsel is clipped on the draw ring of strain gauge, direction of pull and cell piece angle at 45 °；

(4) start strain gauge, make strain gauge the most upwards uniform motion, by tinsel from the pull-up of cell piece surface, The pulling force data that record strain gauge records, takes its average and is this pulling force data wiry.

Result is as shown in table 2 below.

Table 2

Assembly	A1	D1	D2	A2	A3	A4
							Pulling force/N	0.45	0.38	0.25	0.26	0.34	0.33

By the result of table 2 it can be seen that the solar module of the embodiment of the present application is by tinsel glass stripping from cell piece Bigger from required pulling force, i.e. illustrate that in the solaode establishment of the embodiment of the present application, tinsel is steady with the connection of cell piece Qualitative higher.

In the description of the present application, 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 description the application 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, therefore it is not intended that restriction to the application.

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 the description of the present application, " multiple " are meant that two or two Above, unless otherwise expressly limited specifically.

In this application, 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 application.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 herein, it is to be understood that above-described embodiment is exemplary, It is not intended that the restriction to the application, those of ordinary skill in the art is without departing from the principle of the application and the situation of objective Under above-described embodiment can be changed in scope of the present application, revise, replace and modification.

Claims

1. a solar module, it is characterised in that the upper cover plate that includes being sequentially stacked, front adhesive film, cell piece Array, back side adhesive film and backboard, described cell piece array includes multiple cell piece, is led by a plurality of between adjacent cell sheet Electric wire is connected, and at least two described conductor wires are formed by reciprocation extension tinsel between the surface of adjacent cell sheet, described Conductor wire contacts with described cell piece, and described front adhesive film directly contacts with described conductor wire and is filled in adjacent conductor wire Between.

Solar module the most according to claim 1, it is characterised in that described tinsel is in adjacent cell sheet A cell piece front and the back side of another cell piece between reciprocation extension, described front adhesive film and one electricity Conductor wire on the front of pond sheet directly contacts and is filled between the adjacent conductive line on the front of one cell piece, institute State back side adhesive film and directly contact and be filled in another cell piece described with the conductor wire at the back side of another cell piece described Between the adjacent conductive line at the back side.

Solar module the most according to claim 2, it is characterised in that be positioned at the back of the body of another cell piece described The conductor wire in face electrically connects with the back electrode of another cell piece described.

4. according to the solar module according to any one of claim 1-3, it is characterised in that described tinsel is reciprocal Extend 10-60 time to form 20-120 bar conductor wire.

5. according to the solar module according to any one of claim 1-4, it is characterised in that between adjacent conductive line Spacing be 2.5-15mm.

6. according to the solar module according to any one of claim 1-5, it is characterised in that adjacent conductive line is formed U-shaped structure or v-shaped structure.

7. according to the solar module according to any one of claim 1-6, it is characterised in that described tinsel is one Root.

8. according to the solar module according to any one of claim 1-7, it is characterised in that described tinsel is copper Silk.

9. according to the solar module according to any one of claim 1-8, it is characterised in that described tinsel has Circular cross section.

10. according to the solar module according to any one of claim 1-9, it is characterised in that described tinsel exists Reciprocation extension in a tensioned state before contacting with described cell piece.

11. according to the solar module according to any one of claim 1-10, it is characterised in that described tinsel with Adhesion between described cell piece is in the range of 0.1-0.8 newton.

12. solar modules according to claim 11, it is characterised in that described tinsel and described cell piece Between adhesion in the range of 0.2-0.6 newton.

13. according to the solar module according to any one of claim 1-10, it is characterised in that described cell piece Size is 156mm × 156mm；The series resistance of described solar module is 380-440 milliohm/60 slice.

14. according to the solar module according to any one of claim 1-10, it is characterised in that described cell piece Size is 156mm × 156mm；The open-circuit voltage of described solar module is 37.5-38.5V/60 sheet；Short circuit current is 8.9-9.4A。

15. according to the solar module according to any one of claim 1-10, it is characterised in that described solar-electricity The fill factor, curve factor of pond assembly is 0.79-0.82.

16. according to the solar module according to any one of claim 1-10, it is characterised in that described cell piece Size is 156mm × 156mm；The running voltage of described solar module is 31.5-32V/60 sheet；Operating current is 8.4-8.6A。

17. according to the solar module according to any one of claim 1-10, it is characterised in that described cell piece Size is 156mm × 156mm；The conversion efficiency of described solar module is 16.5-17.4%；Power is 265-280W/60 Sheet.

The preparation method of 18. 1 kinds of solar modules, it is characterised in that including:

Tinsel reciprocation extension and is contacted with the surface of described cell piece between the surface of cell piece and forms at least two and lead Electric wire, adjacent cell piece is connected by a plurality of conductor wire and forms cell piece array；

Upper cover plate, front adhesive film, described cell piece array, back side adhesive film and backboard are sequentially stacked, make described battery The front of sheet is in the face of described front adhesive film, and described front adhesive film directly contacts with described conductor wire, makes described cell piece The back side, in the face of back side adhesive film, is then laminated, and front adhesive film is filled between adjacent conductor wire, obtains solar energy Battery component.

The preparation method of 19. solar modules according to claim 18, it is characterised in that described tinsel exists Reciprocation extension in a tensioned state before contacting with described cell piece.

20. according to the preparation method of the solar module described in claim 18 or 19, it is characterised in that described gold Belong between front and the back side of another cell piece of a silk reciprocation extension cell piece in adjacent cell sheet, front glued membrane Layer directly contacts with the conductor wire in the front of one cell piece；The back side of back side adhesive film and another cell piece described Conductor wire directly contacts.

The preparation method of 21. solar modules according to claim 20, it is characterised in that another electricity described The conductor wire at the back side of pond sheet electrically connects with the back electrode on the back side of another cell piece described.

22. according to the preparation method of the solar module according to any one of claim 18-21, it is characterised in that Described tinsel reciprocation extension 10-60 time is to form 20-120 bar conductor wire.

23. according to the preparation method of the solar module according to any one of claim 18-22, it is characterised in that Spacing between adjacent conductive line is 2.5-15mm.

24. according to the preparation method of the solar module according to any one of claim 17-23, it is characterised in that Described tinsel is one.

25. according to the preparation method of the solar module according to any one of claim 18-24, it is characterised in that Described tinsel is copper wire.