CN106206812B

CN106206812B - Solar battery sheet, solar cell module and preparation method thereof

Info

Publication number: CN106206812B
Application number: CN201510218489.4A
Authority: CN
Inventors: 赵志强; 康淑萍; 姜占锋; 何龙
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2014-10-31
Filing date: 2015-04-30
Publication date: 2018-02-09
Anticipated expiration: 2035-04-30
Also published as: CN106206767B; CN106206811A; CN106206767A; CN106206765A; CN106206811B; CN106206762A; CN106206761A; CN106206812A; CN106206818B; CN106206815A; CN106206814A; CN106206809A; CN106206765B; CN106206818A; CN106206834A; CN106206810A; CN106206817B; CN106206762B; CN106206764A; CN106206769A

Abstract

This application discloses a kind of solar cell module, the preparation method of solar cell module, and solar battery cell, solar cell module includes the upper cover plate being sequentially stacked, front adhesive film, battery chip arrays, back side adhesive film and backboard, the battery chip arrays include multiple cell pieces, it is connected between adjacent cell piece by more conductor wires, the conductor wire is formed by wire of the reciprocation extension between the surface of adjacent cell piece, the wire includes wire body and is coated on the conducting resinl of this volume surrounding of wire, the conductor wire contacts with the cell piece, the front adhesive film is directly contacted and is filled between adjacent conductor wire with the conductor wire.According to the solar cell module of the embodiment of the present application, front adhesive film is directly contacted with conductor wire and is filled between adjacent conductor wire, effectively conductor wire and outside air, steam etc. can be completely cut off, avoid the oxidation of conductor wire, electricity conversion can be effectively ensured.

Description

Solar battery sheet, solar cell module and preparation method thereof

Technical field

The application is related to area of solar cell, more particularly to solar battery sheet, solar cell module and its system Preparation Method.

Background technology

Solar cell module is one of important component of device of solar generating.Front illuminated of the sunshine from cell piece Onto cell piece, the front of cell piece is provided with secondary grid line and main gate line, the welding being then welded on by covering in main gate line Extracted current, a positive part for welding, main gate line and secondary grid line covering cell piece, thus can block a part of sunshine, Electric energy can not be transformed into by impinging upon the solar energy on welding, main gate line and secondary grid line, therefore, it is necessary to welding, main grid and secondary grid are got over It is thin better.However, 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 grid Line and secondary grid line get over that detailed rules and regulations conduction cross-sectional area is smaller, and ohmic loss is bigger.Therefore welding, main gate line and secondary grid line design need Balance is obtained between shading and conduction, while to consider cost.

The content of the invention

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

In correlation technique, it is expensive to make the main gate line of solar battery sheet and the slurry main component of secondary grid line Needed when silver, thus causing the preparation of main gate line and secondary grid line complexity, and cost height, and cell piece being connected as into component by one The individual positive main gate line of cell piece is welded by the backplate of welding and adjacent cell piece, therefore the welding of main gate line is complicated, The production cost of cell piece is high.

In correlation technique, the front of cell piece is typically provided with two main gate lines, two main gate lines by cell piece just Face coating silver paste is formed, and the width of main gate line is big (for example, width reaches more than 2mm), and 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 lines, but there are still consumption silver amount and cost Height, moreover, 3 main gate lines increase shading-area, reduce conversion efficiency.

In addition, the raising of main gate line quantity is also limited by welding, main gate line quantity is bigger, and single main grid is thinner, weldering Band is more narrow, and main gate line and welding welding are more difficult, and welding is narrower to be more difficult to manufacture, and welding cost is higher.

Therefore, from cost is reduced, the angle for reducing shading-area is set out, and will be printed on originally on cell piece in correlation technique Silver-colored main gate line replace with wire, such as copper wire, by copper wire and the welding of secondary grid line so as to derived current.Due to not using silver Main gate line, its cost can be greatly reduced, simultaneously because the diameter of copper wire is smaller, can reduce shading-area, therefore, Ke Yijin One step lifts quantity to 10.This cell piece is properly termed as dereliction grid cell piece, wherein, wire substituted for traditional sun Silver-colored main grid and welding in energy cell piece.

Have in correlation technique using the hyaline membrane of wire and battery lamella swaging will be adhesive with into wire and cell piece The technical scheme of electrical connection, i.e. first more parallel wires are fixed on transparent film layer by cohesive mode, then will It is fitted on cell piece, wire is contacted with the secondary grid line on cell piece finally by laminating technology, it is to pass through lamination Technique makes wire be in contact with secondary grid line, so as to derived current.Not only hyaline membrane have impact on the absorptivity of light to this technical scheme, And a large amount of parallel wires are connected the situation there is also loose contact with cell piece, its electrical property is had a strong impact on, therefore need The radical of wire is increased, but the radical of wire increases, and can influence the absorptivity of positive light again, have impact on the property of product Can, therefore, do not promote and be commercialized using the product of this scheme.In addition, the as described above, radical of a large amount of parallel wires Nevertheless suffer from the limitation of the spacing between adjacent wire.

For example, a kind of technical scheme that wire is fixed using hyaline membrane of U.S. Patent Publication, in that patent, multiple Main gate line be arranged in parallel, and is pressed in by transparent film layer on cell piece.Hyaline membrane with main gate line when being laminated, the temperature of lamination Far below the fusion temperature of hyaline membrane, can not be bonded between hyaline membrane and cell piece due to the interval of main gate line with cell piece, There will be gap between hyaline membrane and cell piece, so as to cause the sealing of cell piece component poor, due to air and steam Oxidation, the photoelectric transformation efficiency of cell piece can be largely effected on.

Therefore, in area of solar cell, the structure of solar cell is simultaneously uncomplicated, but each structure is more crucial, The preparation of main grid is because the factor of each side considers, such as shading surface, conductance, equipment, technique, cost etc., causes it as too Difficult point and focus in positive energy battery technology.Those skilled in the art just make on the market too by the effort of several generations many times Positive energy cell piece became three main grid solar cells at 2007 or so by two main grid solar cells, and a small amount of producer was in 2014 Left and right proposes the solar cell of four main grids, and the technology of more main grids is also the concept just proposed in recent years, but realizes more tired Difficulty, there is not more ripe product yet.

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

Present applicant proposes dereliction grid solar cell, the dereliction grid solar cell on cell piece without setting main grid Line, without welding, cost is reduced, and can be commercialized, prepare simple easily realization, particularly cost is low, and equipment is simple, It can produce in batches, electricity conversion is high.

According to the solar cell module of the application first aspect embodiment, including upper cover plate, the front glue being sequentially stacked Film layer, battery chip arrays, back side adhesive film and backboard, the battery chip arrays include multiple cell pieces, between adjacent cell piece It is connected by more conductor wires, the conductor wire is formed by wire of the reciprocation extension between the surface of adjacent cell piece, institute Stating wire includes wire body and is coated on the conducting resinl of this volume surrounding of wire, the conductor wire and the cell piece Contact, the front adhesive film are directly contacted and are filled between adjacent conductor wire with the conductor wire.

According to the solar cell module of the embodiment of the present application, taken by the conductor wire being made up of the wire of reciprocation extension For the main gate line and welding of conventional batteries piece, cost is reduced；The wire of reciprocation extension reduces the free end of wire Number, required space is small when setting wire, is not limited by a space, the radical for the conductor wire being made up of wire reciprocation extension can To greatly improve, prepare simply, can produce in batches；The metal is formed by the external sheath conducting resinl in wire body Silk, and then the conductor wire is formed, conductor wire is formed with cell piece by conducting resinl and electrically connected, during lamination, front The leading electric glue of glued membrane melting layer is just cured and is bonded together with cell piece, it is thus possible to solves front glued membrane in lamination process The problem of melting layer causes wire to drift about so that the solar cell module finally prepared has of a relatively high photoelectricity Transformation efficiency；In addition, front adhesive film is directly contacted with conductor wire and is filled between adjacent conductor wire, can effectively by Conductor wire and outside air, steam etc. completely cut off, and avoid the oxidation of conductor wire, electricity conversion can be effectively ensured.

According to the preparation method of the solar cell module of the application second aspect embodiment, including：In wire body Upper application conducting resinl forms wire；By wire reciprocation extension between the surface of cell piece and with the surface of the cell piece Contact forms more conductor wires, and conductor wire is connected with the secondary grid line of cell piece by conducting resinl, and thus adjacent cell piece passes through The more conductor wires connect and form battery chip arrays；By upper cover plate, front adhesive film, the battery chip arrays, back side glue Film layer and backboard are sequentially stacked, and the front of the cell piece is faced the front adhesive film, so as to the front adhesive film with The conductor wire is directly contacted and is filled between adjacent conductor wire, the back side of the cell piece is faced back side adhesive film, Then it is laminated to obtain solar cell module.

According to the solar battery cell of the application third aspect embodiment, including cell piece and conductor wire, the battery Piece includes battery sheet matrix and the secondary grid line being located on the front of the battery sheet matrix, and the conductor wire is made up of wire, The wire includes wire body and is coated on the conducting resinl of this volume surrounding of wire, and the main gate line passes through the conduction Glue is connected with the secondary grid line.

Brief description of the drawings

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

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

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

Fig. 4 is the schematic diagram for being used to be formed the wire of conductor wire according to the embodiment of the present application.

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

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

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

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

Fig. 9 is that two cell pieces shown in Fig. 8 are formed by connecting the schematic diagrames of solar cell chip arrays by wire.

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

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

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

Reference：

Cell piece component 100；

Upper cover plate 10；

Front adhesive film 20；

Battery chip arrays 30；Cell piece 31；First cell piece 31A；Second cell piece 31B；Battery sheet matrix 311；Secondary grid Line 312；The secondary grid line 312A in front；Back side pair grid line 312B；Edge pair grid line 3121；Middle secondary grid line 3122；Carry on the back electric field 313； Back electrode 314；

Conductor wire 32；Front side conductive line 32A；Back side conductor wire 32B；Wire body 321；Conducting resinl 322；Short grid line 33；

Back side adhesive film 40；

Lower cover 50.

Embodiment

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

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

" cell piece 31 " includes battery sheet matrix 311, the secondary grid line 312 being located on the front of battery sheet matrix 311, set term The back side of battery sheet matrix 311 back of the body electric field 313 and be located at the back of the body electric field 313 on back electrode 314, thus, secondary grid line 312 The secondary grid line 312 of cell piece 31 is properly termed as, back of the body electric field 313 is referred to as the back of the body electric field 313 of cell piece 31, back electrode 314 It is referred to as the back electrode 314 of cell piece 31.

" battery sheet matrix 311 " is such as can the process as silicon chip through making herbs into wool, diffusion, etching edge, deposited silicon nitride layer The intermediate products obtained afterwards, it should be understood that in the application, battery sheet matrix 311 is not limited to be made up of silicon chip, Can be other any suitable solar cell sheet matrixes 311.

In other words, cell piece 31 includes silicon chip, to some process layers of silicon chip surface, the secondary grid line and shady face of smooth surface Back of the body electric field 313 and back electrode 314, or equivalent other class solar cells without front electrode.

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

" solar cell chip arrays 30 " are connected and by metal term including multiple cell pieces 31 with by adjacent cell piece 31 The conductor wire 32 that silk S is formed, in other words, solar cell chip arrays 30 are by multiple rows of cell piece 31 being connected by conductor wire 32 Row form.

In solar cell chip arrays 30, wire S forms the conductor wire 32 of battery unit, and wire S extends in phase It should broadly understood between the surface of adjacent cell piece 31, wire S can extend between the front of adjacent cell piece 31, also may be used To extend between the front of a cell piece 31 in adjacent cell piece 31 and the back side of another cell piece 31.In wire When S is extended between the front of in adjacent cell piece 31 cell piece 31 and the back side of another cell piece 31, conductor wire 32 can include extending on the front of one cell piece 31 and electrically connecting with the secondary grid line 312 of one cell piece 31 Front side conductive line 32A, and extend on the back side of another cell piece 31 and with another cell piece 31 The back side conductor wire 32B that back electrode 314 electrically connects, parts of the wire S between adjacent cell piece 31 is properly termed as connecting Conductor wire.

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

All scopes disclosed in the application can all combine comprising end points and independently.Model disclosed herein The end points and any value enclosed is not limited to the accurate scope or value, and these scopes or value should be understood to include close to these models Enclose or the value of value.

In this application, unless otherwise indicated, directional terminology such as " upper and lower " typically refers to shown in the drawings upper and lower；" just Face " refers to solar cell module in application process towards the one side of light, namely smooth surface；" back side " refers to solar-electricity Pond component is in application process back to the one side of light.

The solar cell module 100 according to the embodiment of the present application is specifically described below in conjunction with the accompanying drawings.

As shown in Figures 1 to 12, upper cover plate 10, front are included according to the solar cell module 100 of the embodiment of the present application Adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50.

Battery chip arrays 30 include multiple cell pieces 31, are connected between adjacent cell piece 31 by more conductor wires 32, institute State more conductor wires 32 to be formed by wire S of the reciprocation extension between the surface of adjacent cell piece, wire S includes wire Body 321 and the conducting resinl 322 for being coated on the surface of wire body 321, conductor wire 32 are contacted by conducting resinl with cell piece 31, Front adhesive film 20 is directly contacted and is filled between adjacent conductor wire 32 with conductor wire 32.

In other words, it is upper including being sequentially stacked along the vertical direction according to the solar cell module 100 of the embodiment of the present application Cover plate 10, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50, battery chip arrays 30 include multiple electricity Pond piece 31 and more conductor wires 32 for connecting multiple cell pieces 31, the more conductor wires 32 are made up of wire S, wire S On the surface of two adjacent cell pieces 31, wire S includes wire body 321 and is coated on wire sheet reciprocation extension The conducting resinl 322 on the surface of body 321.Preferably, the conducting resinl 322 coats whole wire body 321 to form wire S.

Conductor wire 32 electrically connects with cell piece 31, wherein, front adhesive film 20 and conductor wire 32 on cell piece 31 Directly contact and be filled between adjacent conductor wire 32, front adhesive film 20 can be by conductor wire 32 and outside air and water Vapour completely cuts off, and so as to avoid conductor wire 32 from being oxidized, ensure that photoelectric transformation efficiency.In addition, the cell piece component of the structure is in layer During pressure, glued membrane melting layer leading electric glue in front is just cured and is linked together with cell piece, it is ensured that conductor wire with The bonding strength of cell piece, the problem of so as to avoid conductor wire from drifting about, improve the photoelectric transformation efficiency of cell piece component.

Wherein it should be noted that in this application, wire S refers to that reciprocation extension forms conductor wire on cell piece 31 32 wire, and conductor wire 32 includes the conducting resinl 322 of wire body 321 and the external sheath of wire body 321, i.e., it is golden Category silk S is also to include wire body 321 and be coated on the conducting resinl 322 of the outer layer of wire body 321, in the implementation of the application In example, if without specified otherwise, wire refers to the wire S of the reciprocation extension formation conductor wire 32 on cell piece 31.

Thus, according to the solar cell module 100 of the embodiment of the present application, by being made up of the wire S of reciprocation extension Conductor wire 32 substitute conventional batteries piece main gate line and welding, reduce cost；The wire S of reciprocation extension reduces metal The number of silk S free end, required space is small when setting wire S, is not limited by a space, is made up of wire S reciprocation extensions The radical of conductor wire 32 can greatly improve, prepare simple, can produce in batches；By the way that conducting resinl will be coated with surface Wire body 321 is used as wire S to form conductor wire 32, conductor wire 32 is electrically connected by conducting resinl with cell piece, During lamination, conducting resinl is just cured before front adhesive film 20 melts and is bonded together with cell piece 31, it is thus possible to Solve the problems, such as that the thawing of front adhesive film 20 causes wire to drift about in lamination process so that the solar-electricity finally prepared Pond component 100 has of a relatively high electricity conversion；In addition, front adhesive film 20 is directly contacted and filled out with conductor wire 32 Fill between adjacent conductor wire 32, effectively conductor wire 32 and outside air, steam etc. can be completely cut off, avoid conductor wire 32 Oxidation, 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 are respectively each that polyethylene octene elastomer (POE) and/or ethene-vinyl acetate are total to Polymers (EVA).In this application, polyethylene octene elastomer (POE) and ethylene-vinyl acetate copolymer (EVA) can be adopted It is prepared with product commonly used in the art or according to method well known to those skilled in the art.

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

, can be first by the positive of conductor wire and cell piece 31 in the preparation process of solar cell module 100 Secondary grid line 312 and bond to form battery chip arrays with conducting resinl with the back electrode 314 at the back side of another adjacent cell piece 31 30, then by upper cover plate 10, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50 is laid out and layer Pressure obtains solar cell module 100.

It can be known in the art according to other component parts of the solar cell module 100 of the application, herein not Repeat again.

Specifically, multiple cell pieces 31 are included according to the solar cell chip arrays 30 of the embodiment of the present application.Adjacent cell It is connected between piece 31 by more conductor wires 32.The more conductor wires 32 by reciprocation extension the surface of adjacent cell piece 31 it Between wire S form, wire S includes wire body 321 and is coated on the conducting resinl 322 of the outer layer of wire body 321, Conductor wire 32 is formed by conducting resinl with cell piece 31 and electrically connected.Wire S reciprocation extensions can also be said to be in adjacent cell Conductor wire 32 is formed between the surface of piece 31.

Here, cell piece 31 forms electricity with the conductor wire 32 formed by extending in the wire S on the surface of cell piece 31 Pool unit, in other words, it is made up of according to the solar cell chip arrays 30 of the embodiment of the present application multiple battery units, multiple batteries The conductor wire 32 of unit is made up of wire S of the reciprocation extension on the surface of adjacent cell piece 31.

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

In this application, " wire S reciprocation extensions are between the surface of adjacent cell piece 31 " should broadly understood, example Such as, wire S can be with the surface of a cell piece 31 of the reciprocation extension in adjacent cell piece 31 and another cell piece 31 Between surface, wire S can also extend through the table of intermediate cell piece 31 of predetermined quantity from the surface of first cell piece 31 Face to the surface of last cell piece 31, then return and extend through described predetermined from the surface of last cell piece 31 The surface of the intermediate cell piece 31 of quantity to the surface of first cell piece 31, so repeat.

In addition, when cell piece 31 is by wire S parallel connections, wire S can be with reciprocation extension in the front of cell piece 31 On, in the case, wire S forms the front side conductive line 32A of cell piece, and alternatively, wire S reciprocation extensions are in cell piece On 31 front and different wire S reciprocation extensions are on the back side of cell piece 31, in the case, extend in cell piece 31 Wire S on front forms front side conductive line 32A, and the wire S for extending in the back side of cell piece 31 forms back side conductor wire 32B。

When cell piece 31 is one another in series by wire S, one in adjacent cell piece 31 of wire S reciprocation extensions Cell piece 31 front and the back side of another cell piece 31 between, in the case, wire S in a cell piece 31 just The part extended on face forms the part that front side conductive line 32A, wire S extend on the back side of another adjacent cell piece 31 Form back side conductor wire 32B.In this application, unless expressly stated otherwise, conductor wire 32 can be understood as front side conductive line 32A, back side conductor wire 32B, or front side conductive line 32A and back side conductor wire 32B.

Here, term " reciprocation extension " can be understood as wire S extensions " one reciprocal " and form two conductor wires 32, and two Root conductor wire 32 is formed by an one metal wire S coilings, for example, adjacent two conductor wires form U-shaped structure or V-arrangement knot Structure, but the application is not limited to this.

According to the battery chip arrays 30 of the embodiment of the present application, the conductor wires 32 of multiple cell pieces 31 by reciprocation extension metal Silk S is formed, and is connected between adjacent cell piece 31 by conductor wire 32, and therefore, the conductor wire 32 of cell piece is without using valency The expensive silver paste of lattice, and manufacturing process is simple, and the secondary grid line of cell piece, wire S and cell piece is connected without using welding Easy to connect with back electrode, the cost of cell piece substantially reduces.

Further, since conductor wire 32 is made up of the wire S of reciprocation extension, (i.e. wire is in electricity for the width of conductor wire 32 The width of projection on the piece of pond) it can reduce, the shading-area of conductor wire 32 is reduced, moreover, the quantity of conductor wire 32 can be with Easily adjust, compared with the main gate line that silver paste is formed, the resistance of conductor wire 32 reduces, and improves photoelectric transformation efficiency.Due to Wire S reciprocation extensions form conductor wire, and when manufacturing solar cell module 100 using battery chip arrays 30, wire S is not Easily displacement, i.e., wire is less likely to occur " to drift about ", does not interfere with photoelectric transformation efficiency, further increases opto-electronic conversion effect Rate.

Therefore, according to the solar cell chip arrays 30 of the embodiment of the present application, cost is low, photoelectric transformation efficiency is high.

In some embodiments of the application, a cell pieces 31 of the wire S in adjacent cell piece 31 Reciprocation extension, front adhesive film 20 and leading on the front of a cell piece 31 between front and the back side of another cell piece 31 Electric wire 32 is directly contacted and is filled between the adjacent conductive line 32 on the front of a cell piece 31, back side adhesive film 40 with it is another The conductor wire 32 at the back side of one cell piece 31 directly contacts and is filled in the adjacent conductive line at the back side of another cell piece 31 Between 32.

That is, in this application, adjacent two cell pieces 31 are connected by wire S-phase, and adjacent two In individual cell piece 31, front and the wire S-phase of a cell piece 31 connect, the back side of another adjacent cell piece 31 and metal Silk S-phase connects.

Wherein, the front adhesive film 20 and the 31 positive gold of cell piece on cell piece 31 that front connects with wire S-phase Category silk S is directly contacted and is filled between adjacent conductor wire 32, the back side glue of cell piece 31 of the back side with wire S-phase even Film layer 40 is directly contacted and is filled between adjacent conductor wire 32 (such as Fig. 2 institutes with the wire S at the back side of cell piece 31 Show).

Thus, according to the solar cell module 100 of the embodiment of the present application, not only front adhesive film 20 can be by a part Positive conductor wire 32 and the external world of cell piece 31 separate, and back side adhesive film 40 can also leading the back side of percentage of batteries piece 31 Electric wire 32 separates with the external world, may further ensure that the photoelectric transformation efficiency of solar cell module 100.

Alternatively, positioned at the conductor wire 32 at the back side of another cell piece 31 and the back electrode 314 of another cell piece 31 Formed and electrically connected by conducting resinl.

That is, the front of a cell pieces 31 of the wire S in adjacent cell piece 31 and another cell piece 31 The back side between reciprocation extension when, wire S forms front side conductive line 32A in the front of cell piece 31, and wire S is in institute The back side for stating another cell piece 31 forms back side conductor wire 32B, and conductive positioned at the back side at another back side of cell piece 31 Line 32B is to be formed to electrically connect by conducting resinl with the back electrode 314 at another back side of cell piece 31.Thus, it is possible to ensure Wire S and the connection effect at the back side of another cell piece 31.

That is, the front of a cell pieces 31 of the wire S in adjacent cell piece 31 and another cell piece 31 The back side between reciprocation extension form conductor wire 32, conductor wire 32 contacts shape with the positive secondary grid line 312 of a cell piece 31 Into electrical connection, conductor wire 32 contacts formation electrical connection with the back electrode 314 at the back side of another described cell piece 31, thus shape Into the series connection of 2 adjacent cell pieces 31.And the portion that conductive money 32 contacts with the positive secondary grid line 312 of a cell piece 32 Front side conductive line 32A can be referred to as by dividing, and conductor wire 32 can with the part that the back electrode 314 at the back side of another cell piece 31 contacts Referred to as back side conductor wire 32B.

Below with reference to the accompanying drawings solar cell chip arrays 30 according to the application specific embodiment are described.

Solar cell chip arrays 30 with reference to figure 1-3 descriptions according to one specific embodiment of the application.

In the embodiment shown in Fig. 1-3, two cell pieces 31 of solar cell chip arrays 30 are shown, in other words, Show two cell pieces 31 being connected with each other by the conductor wire 32 being made up of wire S.

It is understood that cell piece 31 includes battery sheet matrix 311, the pair being located on the front of battery sheet matrix 311 Grid line 312 (i.e. front secondary grid line 312A), the back of the body electric field 313 being located on the back side of battery sheet matrix 311 and is located at back of the body electric field 313 On back electrode 314.In this application, it is to be understood that unless expressly stated otherwise, back electrode 314 can be tradition electricity The back electrode of pond piece, such as the back side formed or similar to the secondary grid line on cell piece front side of matrix is printed by silver paste Secondary grid line 312B, or discrete multiple weld parts, in this application, unless expressly stated otherwise, secondary grid line refers to electricity Secondary grid line 312 on the front of pond sheet matrix 311.

As Figure 1-3, in this embodiment, solar cell chip arrays include two cell pieces 31A, 31B (in order to retouch State conveniently, referred to herein as the first cell piece 31A, the second cell piece 31B), wire S reciprocation extensions are the first cell piece 31A's Front (smooth surface, the upper surface in Fig. 2) is the second cell piece 31B back side between, and thus, it is electric that wire S constitutes first Pond piece 31A front side conductive line 32A and the second cell piece 31B back side conductor wire 32B, wire S and the first cell piece 31A Positive secondary grid line 312 by conducting resinl electrically connect and pass through conducting resinl with the back electrode 314 at the second cell piece 31B back side Electrical connection.

In certain embodiments, wire reciprocation extension 10-60 between the first cell piece 31A and the second cell piece 31B It is secondary to form 20-120 root conductor wires, it is preferable that as shown in figure 1, wire reciprocation extension 12 times is to form 24 conductor wires 32, and wire is single, in other words, single metal wire reciprocation extension 12 formation, 24 conductor wires, adjacent conductive line 32 it Between spacing can be 2.5 millimeters -15 millimeters.According to this embodiment, compared with the conductor wire 32 of conventional batteries piece, quantity increases Add, so as to reduce distance of the electric current from secondary grid line to conductor wire, reduce resistance, improve electricity conversion.In Fig. 1 institutes In the embodiment shown, adjacent conductive line forms U-shaped structure, is thus easy to the coiling of wire.Alternatively, the application is not limited to This, for example, adjacent conductive line can also form v-shaped structure.

In some embodiments it may be preferred that wire body 321 is copper wire, but the application is not limited to this, such as metal Silk body 321 can also be aluminium wire.Preferably, wire S has circular cross section, and thus, more sunshines can irradiate Onto battery sheet matrix, photoelectric transformation efficiency is further improved.

Specifically, as shown in figure 4, the outside of wire body 321, which is coated with conducting resinl 322, forms wire S, wire S It is connected by conducting resinl 322 with secondary grid line 312 and/or back electrode 314.Thus, it is easy to wire S and secondary grid line 312 and/or the back of the body The electrical connection of electrode 314, wire S in connection procedure is avoided to drift about and influence photoelectric transformation efficiency.Certainly, wire and battery The electrical connection of lamellar body can be carried out in the lamination process of solar cell module, can also be carried out before being laminated, it is preferable that It is attached before being laminated.

In some embodiments it may be preferred that before wire contacts with cell piece, wire is reciprocal in a tensioned state Extension, i.e., stretch wire, after the secondary grid line and back electrode with cell piece are connected, can discharge the tensioning of wire Power, the conductor wire when preparing solar cell module is thus further avoided to drift about and influence photoelectric transformation efficiency.

In some embodiments of the application, the width of secondary grid line 312 is 40-80 microns, and thickness is that 5-20 is micro- Rice, secondary grid line 312 is 50-120 bars, and the spacing of adjacent two secondary grid lines 312 is 0.5-3mm.Thus, the secondary grid line 312 More reasonable structure, has bigger Shouguang area, and photoelectric transformation efficiency is higher.

Preferably, the adhesion between wire S and cell piece 31 is in the range of 0.1-0.8 newton.That is, lead Adhesion between electric wire 32 and cell piece 31 is between 0.1-0.8 newton.Preferably, the knot between wire and cell piece 31 With joint efforts in the range of 0.2-0.6 newton.Thus, it is connected firmly between cell piece 31 and wire S, cell piece 31 is being operated and turned Sealing-off is less prone to during shifting, the problem of being less prone to loose contact and cause hydraulic performance decline, while cost is relatively low.

Fig. 5 shows the schematic diagram of the battery chip arrays of another embodiment according to the application.As shown in figure 5, wire Reciprocation extension is between the first cell piece 31A front and the second cell piece 31B front, and thus, wire forms the first electricity The front side conductive line of pond piece 31A front side conductive line and the second cell piece 31B, in the case, the first cell piece 31A and second Cell piece 31B is connected in parallel to each other, it is, of course, understood that preferably, the first cell piece 31A back electrode and the second cell piece 31B back electrode can also be connected by the back side conductor wire that another wire reciprocation extension is formed, alternatively, the first cell piece 31A back electrode and the second cell piece 31B back electrode can also be connected by traditional mode.

Figure 12 shows the schematic diagram of the battery chip arrays of the another embodiment according to the application.As shown in figure 12, battery The front of piece 31 has short grid line 33 and secondary grid line 312, and secondary grid line 312 includes the secondary grid line 3122 in centre intersected with conductor wire 32 The edge pair grid line 3121 not intersected with conductor wire 32, short grid line 33 are connected with edge pair grid line 3121, and short grid line 33 with The secondary grid line 3122 of conductor wire 32 or at least one centre is connected.Preferably, short grid line 33 is by the edge pair grid line of adjacent cells piece 3121 are connected with conductor wire 32.Preferably, short grid line 33, can also perpendicular to edge pair grid line 3121 or middle secondary grid line 3122 Say short grid line 33 perpendicular to secondary grid line 312.

Thus, so can be with by setting short grid line 33 on the secondary grid line 312 of the edge portions of the smooth surface of cell piece 31 Avoid being unable to reach the secondary grid line 312 of the edge portions of cell piece 31 during due to arranging in the coiling of conductor wire 32 and causing Portion of electrical current waste, so as to further improve the electricity conversion of solar cell module 100.

Solar cell chip arrays 30 below with reference to Fig. 6 descriptions according to another embodiment of the application.

Include n × m cell piece 31, in other words, Duo Ge electricity according to the solar cell chip arrays 30 of the embodiment of the present application Pond piece 31 is arranged into n × m matrix form, and wherein n is columns, and m is row.More specifically, in this embodiment, 36 batteries Piece 31 is arranged in 6 row and 6 rows, i.e. n=m=6.It is understood that the application is not limited to this, for example, row and columns can With unequal.For convenience, in figure 6, along direction from left to right, the cell piece 31 in same row's cell piece 31 is successively The cell piece 31 of referred to as first, second, third, fourth, the 5th and the 6th, along direction from the top down, the row of cell piece 31 is successively The row's cell piece 31 of referred to as first, second, third, fourth, the 5th and the 6th.

In same row's cell piece 31, wire reciprocation extension is on the surface of a cell piece 31 and another adjacent battery Between the surface of piece 31, in two adjacent row's cell pieces 31, a cell piece 31 of the wire reciprocation extension in a rows Between surface and the surface of a cell piece 31 in a+1 rows, and m-1 >=a >=1.

As shown in fig. 6, in specific example, in same row's cell piece 31, wire reciprocation extension is in a battery Piece 31 it is positive between the back side of another adjacent cell piece 31, thus, the cell piece 31 in same row is one another in series. In two adjacent row's cell pieces 31, wire reciprocation extension is in the front and position of the cell piece 31 positioned at the end that a is arranged Between the back side of a cell piece 31 of the end of a+1 rows, thus adjacent two rows cell piece 31 is one another in series.

It is highly preferred that in adjacent two rows cell piece 31, wire reciprocation extension is in the electricity positioned at the end that a is arranged Between the surface of pond piece 31 and the surface of cell piece 31 positioned at the end of a+1 rows, an end and the a+ of a rows The end of 1 row is located at the same side of matrix, such as in figure 6, positioned at the right side of matrix.

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

The 6th cell piece 31 in six roots of sensation wire reciprocation extension first row it is positive with adjacent second row the Between the back side between six cell pieces 31, thus, first row and second row are one another in series, the 7th one metal wire reciprocation extension second Between the back side in the front of the 6th cell piece 31 in row and second row between the 5th cell piece 31, the 8th one metal wire is reciprocal Between extending the back side in the positive and second row of the 5th cell piece 31 in second row between the 4th cell piece 31, until the tenth The back of the body in the front of the second cell piece 31 in one one metal wire reciprocation extension second row and second row between the first cell piece 31 Between face, then, the front of the first cell piece 31 in the 12nd one metal wire reciprocation extension second row and in the 3rd row first Between the back side between cell piece 31, thus second row is one another in series with the 3rd row.Then, the 3rd row and the 4th row are gone here and there successively Connection, the 4th row connect with the 5th row, and the 5th row connects with the 6th row, thus complete the preparation of battery chip arrays 30, implement herein In example, busbar is set in the left side of the first cell piece 31 of first row and the left side of the first cell piece 31 of the 6th row, one The conductor wire that busbar connection is extended from the left side of the first cell piece 31 of first row, another busbar connection is from the 6th row's The conductor wire that the left side of first cell piece 31 is extended.

As shown in the figure and above-mentioned, connection between the cell piece of the embodiment of the present application is connected using conductor wire, first row, the Series connection is realized using conductor wire between two rows, the 3rd row, the 4th row, the 5th row and the 6th row, as illustrated, alternatively, Can be between second row and the 3rd row, the in parallel diode for being used to prevent spottiness, two poles between the 4th row and the 5th row The connection of pipe can be using well known to a person skilled in the art technology, such as busbar.

However, the application is not limited to this, for example, can be connected between first row and second row, the 3rd row and the 4th row Series connection, the 5th row and the 6th row series connection, while second row and the 3rd row are in parallel, the 4th row and the 5th row are in parallel, in the case, It can be set in the left side of respective row or right side and busbar is set respectively.

Alternatively, the cell piece 31 in same row can be in parallel, for example, an one metal wire is from the first battery in first row The front that the front reciprocation extension of piece 31 passes through the second to the 6th cell piece 31.

The conducting resinl 322 coated in the application on wire body 321 is detailed below.

According to one embodiment of the application, conducting resinl 322 contains thermosetting resin and conducting particles, thermosetting resin Melting temperature of the solidification temperature less than front adhesive film and back side adhesive film.Thus, it can be ensured that conducting resinl 322 can be in front glue Film layer 20 solidifies before melting and is bonded together with cell piece 31.

Under preferable case, the solidification temperature of thermosetting resin is 20-80 DEG C.Particularly, when the material selection of adhesive film gathers When ethylene octene is total to elastomer (POE) and/or ethylene-vinyl acetate copolymer (EVA), select in the range of above-mentioned solidification temperature Thermosetting resin can obtain more excellent effect, for example, solar cell module 100 can be caused to have higher photoelectric conversion Efficiency.

In this application, the thermosetting resin with above-mentioned preferred consolidation temperature range can be selected from epoxy resin and third At least one of alkene acid ester resin.

Preferably, in conducting resinl, on the basis of the gross weight of conducting resinl 322, the content of thermosetting resin can be 10- 40 weight %, preferably 15-25 weight %；The content of conducting particles can be 60-90 weight %, preferably 75-85 weight %.

Further, conducting particles can be the conventional metallic for being used to be formed conducting resinl 322, such as can be silver Powder and/or bronze.The particle diameter of conducting particles can be 0.1-20 microns, preferably 1-10 microns.The thickness of conducting resinl 322 is 1- 100 microns, the cross-sectional area of wire body 321 is 0.01-0.5 square millimeters.Thus, the conducting resinl 322 of the structure and electricity Pond piece 31 has more preferable connection effect, can preferably avoid conductor wire 32 from drifting about.

In some embodiments of the application, the size for the cell piece of routine is 156mm × 156mm；Too It is positive can the series resistance of battery component be 380-440 milliohm/60 piece, while the application is not limited to 60, can be 30, 72 etc., when for 72 when solar cell module series resistance be 456-528 milliohms, the excellent electrical property of battery.

In some embodiments of the application, the size for the cell piece of routine is 156mm × 156mm；Too It is positive can the open-circuit voltage of battery component be 37.5-38.5V/60 pieces, same the application is not limited to 60, can be 30, 72 etc..Short circuit current is 8.9-9.4A, and short circuit current is unrelated with the number of cell piece.

In some embodiments of the application, the fill factor, curve factor of solar cell module is 0.79-0.82, and it is not Influenceed by the size and number of cell piece, it influences the electrical property of battery.

In some embodiments of the application, the size for the cell piece of routine is 156mm × 156mm；Too It is positive can the operating voltage of battery component be 31.5-32V/60 pieces, same the application is not limited to 60, can be 30,72 Piece etc..Operating current is 8.4-8.6A, and operating current is unrelated with the number of cell piece.

In some embodiments of the application, the size for the cell piece of routine is 156mm × 156mm；Too The conversion efficiency of positive energy battery component is 16.5-17.4%.Power is 265-280W/60 pieces.

Preparation method below with reference to Fig. 7-9 descriptions according to the solar cell module 100 of the embodiment of the present application.

Include applying on wire body 321 first according to the preparation method of the solar cell module of the embodiment of the present application Conducting resinl 322 is added to form wire S.Then by wire S reciprocation extensions between the surface of cell piece 31 and with cell piece Surface contacts to form conductor wire 32, is connected between conductor wire 32 and cell piece 31 by conducting resinl 322, thus adjacent cell piece Battery chip arrays 30 are formed by more conductor wire connections.

Upper cover plate 10, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50 are sequentially stacked, made The front of cell piece 31 faces front adhesive film 20, so that front adhesive film 20 directly contacts with conductor wire 32 and is filled in adjacent Conductor wire 32 between, the back side of cell piece 31 is faced back side adhesive film 40, be then laminated to obtain solar battery group Part 100.

In other words, according to the solar cell module 100 of the application in the preparation, wrapped first on wire body 321 Cover one layer of conducting resinl 322 and form wire S, then by wire S reciprocation extensions on the surface of adjacent cell piece 31 and with The surface contact of cell piece 31 forms multiple conductor wires 32, is connected between conductor wire 32 and cell piece 31 by conducting resinl 322, more Individual cell piece 31, which is connected, forms battery chip arrays 30.

Then upper cover plate 10, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50 are folded successively Put, between front adhesive film 20 and conductor wire 32 is directly contacted and being filled in adjacent conductor wire 32, finally by upper cover plate 10th, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50 are laminated that to can obtain the application above-mentioned Solar cell module 100.

Specifically, as shown in fig. 7, in a tensioned state, by wire reciprocation extension 12 times.Then, it is as shown in figure 8, accurate Standby first cell piece 31A and the second cell piece 31B.Next, as shown in figure 9, by the first cell piece 31A front and wire It is connected and the second cell piece 31B back side is connected with wire, is consequently formed battery chip arrays 30, two are shown in Fig. 9 Cell piece 31, as above, when battery chip arrays 30 have multiple cell pieces 31, using the wire of reciprocation extension by a battery The positive back side with another adjacent cell piece 31 of piece 31 is connected, i.e., by the secondary grid line of a cell piece 31 and another electricity The back electrode of pond piece 31 is connected with wire.Wire is past under two clips tensioning of this two end of root silk by being located at respectively Multiple extension.In the embodiment shown in fig. 9, adjacent cell piece is one another in series, and as above, as needed, adjacent cell piece can lead to Wire is crossed to be connected in parallel to each other.

By the battery chip arrays 30 being prepared and upper cover plate 10, front adhesive film 20, back side adhesive film 40 and backboard 50 Be sequentially stacked, and the front of cell piece 31 is faced front adhesive film 20, front adhesive film 20 directly contacted with conductor wire 32 and It is filled between adjacent conductor wire 32, the back side of cell piece 31 faces back side adhesive film 40, is then laminated to obtain the sun Can battery component 100.It is understood that wire can be bonded or welded with cell piece 31, wire and cell piece 31 Connection can be carried out in lamination process, it is of course also possible to first connect, rear lamination.

The solar cell module 100 of the application is described with reference to specific example.

Example 1

Example 1 is used for the example for illustrating the solar cell module 100 of the application and preparation method thereof.

(1) wire S is prepared

Adhere to one layer of epoxide resin conductive adhesive on the surface of copper wire, wherein, the cross-sectional area of copper wire is 0.04mm², ring The thickness of oxygen tree fat conducting resinl is 16 microns, so as to which wire S be made.

(2) solar cell module 100 is prepared

The POE adhesive films (melt temperature is 65 DEG C) that size is 1630 × 980 × 0.5mm are provided, and chi is correspondingly provided It is very little be 1633 × 985 × 3mm glass plate and 60 chip sizes be 156 × 156 × 0.21mm polycrystalline silicon battery plate 31.Cell piece 31 have 91 secondary grid lines (material is silver, and width is 60 microns, and thickness is 9 microns), and every secondary grid line is substantially in the vertical Through cell piece 31, and the distance between adjacent pair grid line is 1.7mm, and the back side of cell piece 31 has 5 back electrodes, and (material is Tin, width are 1.5 millimeters, and thickness is 10 microns), every back electrode substantially runs through cell piece 31, and adjacent two in the vertical The distance between bar back electrode is 31mm.

60 cell pieces 31 are arranged with a matrix type (6 rows 10 arrange), in same row, and in two adjacent batteries Between piece 31, make state of the one metal wire in tension between the front and the back side of another cell piece of a cell piece 31 Reciprocation extension, wire is tensioned lower reciprocation extension by being located at two clips of this two end of root silk respectively, so as to form 15 The parallel conductor wire of bar, and the distance between adjacent conductive line being parallel to each other is 9.9mm, so as to which 10 cell pieces be connected into One row, such a battery strings of 6 rows are connected into array by busbar.Then, by upper glass plates, upper POE adhesive films, with square Multiple cell pieces, lower POE adhesive films and the lower glass plate that formation formula is arranged and is connected with wire stack successively from top to bottom, its In, the smooth surface of cell piece 31 is faced front adhesive film 20, front adhesive film 20 is directly contacted and filled with conductor wire 32 Between adjacent conductor wire 32, the back side of cell piece 31 is faced back side adhesive film 40, be subsequently placed into laminating machine and carry out layer Pressure, so as to which solar cell module A1 be made.

Comparative examples 1

The difference of comparative examples 1 and example 1 is：

Cell piece is arranged with a matrix type, 15 wires being cascaded are pasted in transparent adhesive tape film layer, will Wire is pasted on solar battery sheet, and between two adjacent cell pieces, wire connects the front of a cell piece With the back side of another cell piece then, by upper glass plates, upper POE adhesive films, transparent adhesive tape film layer, in the matrix form arrangement and with Wire connected multiple cell pieces, transparent adhesive tape film layer, lower POE adhesive films and lower glass plate stack successively from top to bottom.So as to Solar cell module D1 is made.

Example 2

(1) wire S is prepared

Adhere to one layer of acrylate conducting resinl on the surface of copper wire, wherein, the cross-sectional area of copper wire is 0.03mm², third The thickness of olefin(e) acid ester conducting resinl is 10 microns, so as to which wire S be made.

(2) solar cell module is prepared

There is provided the EVA adhesive film layer that size is 1630 × 980 × 0.5mm (melt temperature is 60 DEG C), there is provided size 1633 × 985 × 3mm glass plate and the polycrystalline silicon battery plate 31 that 60 chip sizes are 156 × 156 × 0.21mm.The light of cell piece 31 Face is provided with 91 secondary grid lines (material is silver, and width is 60 microns, and thickness is 9 microns), and every secondary grid line is substantially in longitudinal direction It is upper to run through cell piece 31, and the distance between adjacent two secondary grid lines are 1.7mm, the back side of cell piece 31 is provided with 5 back of the body electricity Pole (material is tin, and width is 1.5 millimeters, and thickness is 10 microns), and every back electrode substantially runs through battery in the vertical Piece 31, and the distance between adjacent two back electrodes are 31mm.

60 cell pieces 31 are arranged with a matrix type (6 rows 10 arrange), in same row, and in two adjacent batteries Between piece 31, make state of the one metal wire in tension between the front and the back side of another cell piece of a cell piece 31 Reciprocation extension, wire is tensioned lower reciprocation extension by being located at two clips of this two end of root silk respectively, so as to form 20 The parallel conductor wire of bar, and by the secondary grid line of a cell piece body 31 and conductive wire bonding, by another cell piece body 31 Back electrode and conductive wire bonding, and the distance between adjacent conductive line being parallel to each other be 7mm, so that by 10 cell piece strings Join in a row, such a battery strings of 6 rows are connected into array by busbar.Then, by upper glass plates, upper POE adhesive films, Arrange in the matrix form and multiple cell pieces with welded wire, lower POE adhesive films and lower glass plate are folded successively from top to bottom Put, wherein, the smooth surface of cell piece 31 is faced front adhesive film, front adhesive film 20 is directly contacted and filled out with conductor wire 32 Fill between adjacent conductor wire 32, the back side of cell piece 31 is faced back side adhesive film, be subsequently placed into laminating machine and carry out layer Pressure, so as to which solar cell module A2 be made.

Example 3

Solar cell module is prepared according to the method for example 1, the difference with example 1 is：It is attached on the surface of copper wire One layer of epoxide resin conductive adhesive thickness as 5 microns.So as to which solar cell module A3 be made.

Example 4

Solar cell module is prepared according to the method for example 1, the difference with example 1 is：It is attached on the surface of copper wire One layer of acrylate conducting resinl, thickness is 3 microns.So as to which solar cell module A4 be made.

Example 5

Solar cell module is prepared according to the method for example 1, the difference with example 1 is：It is attached on the surface of copper wire One layer of epoxide resin conductive adhesive, thickness is 2 microns.So as to which solar cell module A5 be made.

Example 6

Solar cell module is prepared according to the method for example 1, the difference with example 1 is：In the light of cell piece 31 Short grid line 33 (material is silver, width 0.1mm) is set on the secondary grid line 312 in face, the short grid line 33 is vertical with secondary grid line 312, For the secondary grid line 312 and conductor wire 32 of the edge portions of the smooth surface that connects cell piece 31, as shown in figure 12, so as to be made too Positive energy battery component A6.

Example 7

Solar cell module is prepared according to the method for example 1, the difference with example 1 is：The cell piece 31 of 10 rows 6 row Between connected mode be：Between two adjacent row's cell pieces, battery of the conductor wire from an end in a (a >=1) rows The back side of the cell piece 31 of adjacent end portion, which is formed, during the smooth surface of piece extends and arranged with a+1 electrically connects, adjacent for realizing Connection between two row's cell pieces, and it is adjacent in this two row with being used to connecting for connecting the conductor wire of adjacent two rows cell piece 31 The conductor wire of cell piece 31 is mutually perpendicular to arrange.So obtained solar cell module A7.

Test case 1

(1) whether the wire observed by naked-eye observation method in solar cell module drifts about；

(2) method according to disclosed in IEC904-1 is prepared using single flash operation simulator to above-mentioned example and comparative examples Solar cell module is tested, and test condition is standard test condition (STC)：Light intensity is 1000W/m²；Spectrum is AM1.5；Temperature is 25 DEG C, records the photoelectric transformation efficiency of each cell piece.

As a result it is as shown in table 1 below.

Wherein, fill factor, curve factor represents the maximum power point power of solar cell module and maximum during zero internal resistance in theory The ratio of power (i.e. open-circuit voltage * short circuit currents), characterizes close degree of the actual power to theoretical maximum power, and the value is got over Greatly, illustrate that photoelectric transformation efficiency is higher, general series resistance is small, and fill factor, curve factor is with regard to big；Photoelectric transformation efficiency is that finger assembly is being marked (light intensity 1000W/m under the conditions of quasi-optical photograph²), component converts light energy into the ratio of electric energy；Series resistance is equivalent to solar energy group The internal resistance of part, its value is bigger, and assembly property is poorer；Fill factor, curve factor, represent the actual peak power and theoretical maximum power of component Ratio, numerical value is bigger, and assembly property is better；Open-circuit voltage be component under standard illumination condition, voltage during open circuit；Short circuit Component is under standard illumination condition during electric current, electric current when short-circuit；Operating voltage be component under standard illumination condition, with maximum Output voltage when power works；Operating current be component under standard illumination condition, output when being worked with peak power electricity Stream；Power be finger assembly under standard illumination condition, the peak power that can reach.

Wire drift will not occur for the solar cell module of the embodiment of the present application it can be seen from the result of table 1 Problem, and of a relatively high photoelectric transformation efficiency can be obtained.

In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time The orientation or position relationship of the instruction such as pin ", " counterclockwise " are based on orientation shown in the drawings or position relationship, are for only for ease of Description is of the invention to be described with simplified, rather than the device or element of instruction or hint meaning must be with specific orientation, Yi Te Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.

In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for 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 invention, " multiple " are meant that two or more, Unless otherwise specifically defined.

In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc. Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；It can be machine Tool connects or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, can be two members Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be Concrete meaning in bright.

In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under " Can directly it be contacted including the first and second features, it is not directly to contact but pass through it that can also include the first and second features Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special Sign is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.Fisrt feature exists Second feature " under ", " lower section " and " following " fisrt feature that includes are directly over second feature and oblique upper, or be merely representative of Fisrt feature level height is less than second feature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any One or more embodiments or example in combine in an appropriate manner.

Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is not departing from the principle and objective of the present invention In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.

Claims

1. a kind of solar cell module, it is characterised in that including the upper cover plate, front adhesive film, cell piece battle array being sequentially stacked Row, back side adhesive film and backboard, the battery chip arrays include multiple cell pieces, pass through more conductor wires between adjacent cell piece It is connected, the conductor wire is formed by wire of the reciprocation extension between the surface of adjacent cell piece, and the wire includes gold Category silk body and the conducting resinl for being coated on this volume surrounding of wire, the conductor wire contact with the cell piece, the front Between adhesive film and the conductor wire directly contact and be filled in adjacent conductor wire, the front of the cell piece has short grid line With secondary grid line, the secondary grid line includes the secondary grid line in centre intersected with the conductor wire and the edge not intersected with the conductor wire Secondary grid line, the short grid line are connected with the edge pair grid line, and the short grid line and the conductor wire or at least one centre Secondary grid line is connected.

2. solar cell module according to claim 1, it is characterised in that the wire is in adjacent cell piece Reciprocation extension, the front adhesive film and one battery between the front and the back side of another cell piece of one cell piece Conductor wire on the front of piece is directly contacted and is filled between the adjacent conductive line on the front of one cell piece, described Back side adhesive film directly contacts with the conductor wire at the back side of another cell piece and is filled in another cell piece Between the adjacent conductive line at the back side.

3. solar cell module according to claim 2, it is characterised in that positioned at the back side of another cell piece Conductor wire electrically connected with the back electrode of another cell piece.

4. solar cell module according to claim 1, it is characterised in that the conducting resinl contain thermosetting resin and Conducting particles, the solidification temperature of the thermosetting resin are less than the melting temperature of the front adhesive film and back side adhesive film.

5. solar cell module according to claim 4, it is characterised in that the solidification temperature of the thermosetting resin is 20-80℃。

6. solar cell module according to claim 5, it is characterised in that the thermosetting resin be epoxy resin and At least one of acrylate.

7. solar cell module according to claim 4, it is characterised in that in the conducting resinl, with the conduction On the basis of the gross weight of glue, the content of the thermosetting resin is 10-40 weight %, and the content of the conducting particles is 60-90 Weight %.

8. solar cell module according to claim 4, it is characterised in that the conducting particles is silver powder and/or gold Powder.

9. solar cell module according to claim 1, it is characterised in that the thickness of the conducting resinl is that 1-100 is micro- Rice, the cross-sectional area of the wire body is 0.01-0.5 square millimeters.

10. solar cell module according to claim 1, it is characterised in that the front adhesive film and the back side The material of adhesive film is respectively each polyethylene octene elastomer and/or ethylene-vinyl acetate copolymer.

11. the solar cell module according to any one of claim 1, it is characterised in that the cell piece is multiple To form battery chip arrays, it is connected between adjacent cell piece by a plurality of conductor wire, the wire reciprocation extension is in adjacent electricity Between the surface of a cell piece and the surface of another cell piece in the piece of pond.

12. solar cell module according to claim 11, it is characterised in that the wire is in one battery Reciprocation extension between the back side of another positive and described cell piece of piece.

13. solar cell module according to claim 12, it is characterised in that the conductor wire from an one metal wire toward After-combustion system forms.

14. solar cell module according to claim 13, it is characterised in that the wire reciprocation extension 10-60 It is secondary.

15. solar cell module according to claim 14, it is characterised in that the spacing between adjacent two conductor wires For 2.5-15mm.

16. solar cell module according to claim 14, it is characterised in that adjacent two conductor wires form U-shaped knot Structure or v-shaped structure.

17. solar cell module according to claim 1, it is characterised in that the short grid line is perpendicular to the secondary grid Line.

18. according to the solar cell module any one of claim 1-3, it is characterised in that the cell piece arrangement Into n × m matrix form, wherein n is columns, and m is row,

In same row's cell piece, the wire reciprocation extension is on the surface of a cell piece and another adjacent cell piece Between surface, in two adjacent row's cell pieces, the wire reciprocation extension a row in a cell piece surface with Between the surface of a cell piece in a+1 rows, and m-1 >=a >=1.

19. solar cell module according to claim 18, it is characterised in that described in adjacent two rows cell piece Wire reciprocation extension is on the surface of the cell piece positioned at the end that a is arranged and the electricity positioned at the end of a+1 rows Between the surface of pond piece, the end of a rows is located at the same of the matrix with the end that the a+1 is arranged Side.

20. solar cell module according to claim 19, it is characterised in that in same row's cell piece, the gold Belong to silk reciprocation extension in the positive between the back side of another adjacent cell piece of cell piece,

In two adjacent row's cell pieces, the wire reciprocation extension in the cell piece positioned at the end that a is arranged just Face and positioned at a+1 row end a cell piece the back side between, with adjacent two rows cell piece of connecting.

21. solar cell module according to claim 1, it is characterised in that in same row's cell piece, the metal Silk reciprocation extension is positive between the back side of another adjacent cell piece cell piece,

22. solar cell module according to claim 1, it is characterised in that the width of the secondary grid line is that 40-80 is micro- Rice, thickness is 5-20 microns, and the secondary grid line is 50-120 bars, and the spacing of adjacent two secondary grid lines is 0.5-3mm.

23. solar cell module according to claim 1, it is characterised in that the wire body is copper wire.

24. solar cell module according to claim 1, it is characterised in that the wire body has circular horizontal Section.

25. solar cell module according to claim 1, it is characterised in that the wire and the cell piece it Between adhesion in the range of 0.1-0.8 newton.

26. solar cell module according to claim 25, it is characterised in that the wire and the cell piece it Between adhesion in the range of 0.2-0.6 newton.

A kind of 27. preparation method of solar cell module, it is characterised in that including：

Apply conducting resinl on wire body and form wire；

Contact to form more conductor wires by wire reciprocation extension between the surface of cell piece and with the surface of the cell piece, Conductor wire is connected with the secondary grid line of cell piece by conducting resinl, thus adjacent cell piece by the more conductor wires connect and Form battery chip arrays；

Upper cover plate, front adhesive film, the battery chip arrays, back side adhesive film and backboard are sequentially stacked, make the cell piece Front face the front adhesive film, so that the front adhesive film directly contacts with the conductor wire and is filled in adjacent Between conductor wire, the back side of the cell piece is faced back side adhesive film, be then laminated to obtain solar cell module；

The front of the cell piece has short grid line and secondary grid line, and the secondary grid line includes the middle pair intersected with the conductor wire Grid line and the edge pair grid line not intersected with the conductor wire, the short grid line are connected with the edge pair grid line, and described short The secondary grid line of grid line and the conductor wire or at least one centre is connected.

28. the preparation method of solar cell module according to claim 27, it is characterised in that the conductor wire and institute State being carried out while being mutually connected in lamination for secondary grid line.

29. the preparation method of the solar cell module according to any one of claim 27-28, it is characterised in that institute State conducting resinl and contain thermosetting resin and conducting particles, the solidification temperature of the thermosetting resin less than the front adhesive film and The melting temperature of back side adhesive film.

30. the preparation method of solar cell module according to claim 29, it is characterised in that the thermosetting resin Solidification temperature be 20-80 DEG C.

31. the preparation method of solar cell module according to claim 29, it is characterised in that the thermosetting resin For at least one of epoxy resin and acrylate.

32. the preparation method of solar cell module according to claim 29, it is characterised in that in the conducting resinl In, on the basis of the gross weight of the conducting resinl, the content of the thermosetting resin is 10-40 weight %, the conducting particles Content be 60-90 weight %.

33. the preparation method of solar cell module according to claim 29, it is characterised in that the conducting particles is Silver powder and/or bronze.

34. the preparation method of solar cell module according to claim 27, it is characterised in that the thickness of the conducting resinl Spend for 1-100 microns, the cross-sectional area of the wire is 0.01-0.5 square millimeters.

35. the preparation method of solar cell module according to claim 27, it is characterised in that the front adhesive film Material with the back side adhesive film is respectively each polyethylene octene elastomer and/or ethylene-vinyl acetate copolymer.

36. the preparation method of solar cell module according to claim 27, it is characterised in that the wire is reciprocal One in adjacent cell piece is extended between the surface of cell piece and the surface of another cell piece.

37. the preparation method of solar cell module according to claim 36, it is characterised in that the wire is in institute State reciprocation extension between the back side of another positive and described cell piece of a cell piece.

38. the preparation method of the solar cell module according to claim 37, it is characterised in that the conductor wire is by one The reciprocal coiling of one metal wire forms.

39. the preparation method of the solar cell module according to claim 38, it is characterised in that the wire is reciprocal Extension 10-60 times.

40. the preparation method of the solar cell module according to claim 38, it is characterised in that adjacent two conductor wires Form U-shaped structure or v-shaped structure.

41. a kind of solar battery cell, it is characterised in that including cell piece and conductor wire, the cell piece includes cell piece Matrix and the secondary grid line being located on the front of the battery sheet matrix, the conductor wire are made up of wire, the wire bag Include wire body and be coated on the conducting resinl of this volume surrounding of wire, the conductor wire passes through the conducting resinl and the secondary grid Line is connected, and the front of the cell piece has short grid line and secondary grid line, and the secondary grid line is included in intersecting with the conductor wire Between secondary grid line and the edge pair grid line that does not intersect with the conductor wire, the short grid line is connected with the edge pair grid line, and institute The secondary grid line of short grid line and the conductor wire or at least one centre is stated to be connected.