CN106206815B - Solar cell module and preparation method thereof - Google Patents

Abstract

This application discloses a kind of solar cell modules and preparation method thereof, solar cell module includes the upper cover plate being sequentially stacked, front adhesive film, cell piece, back side adhesive film and backboard, the cell piece has secondary grid line, transparent film layer is equipped between the front adhesive film and the cell piece, the transparent film layer surface opposite with the cell piece is equipped with conductor wire, the conductor wire is embedded into the transparent film layer and exposes out of described transparent film layer, the conductor wire is made of wire and is connected with the secondary grid line, the fusing point of the transparent film layer is higher than the fusing point of the front adhesive film and the back side adhesive film.According to the solar cell module of the embodiment of the present application, can to avoid lamination during due to front adhesive film and back side adhesive film thawing and the problem of cause wire to drift about, guarantee the connective stability between conductor wire and secondary grid line, to guarantee the photoelectric conversion efficiency of solar cell module.

Description

Solar cell module and preparation method thereof

Technical field

This application involves area of solar cell, more particularly to solar cell module and preparation method thereof.

Background technique

Solar cell module is one of important component of device of solar generating.Front illuminated of the sunlight from cell piece Onto cell piece, the front of cell piece is equipped with secondary grid line and main gate line, the welding being then welded in main gate line by covering Extracted current, positive a part of welding, main gate line and secondary grid line covering cell piece, thus can block a part of sunlight, The solar energy impinged upon on welding, main gate line and secondary grid line can not be transformed into electric energy, and therefore, it is necessary to welding, main grid and secondary grid to get 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.

Summary of the invention

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

In the related technology, the slurry main component of the main gate line and secondary grid line that make solar battery sheet is expensive Thus it is complicated and at high cost to lead to the preparation of main gate line and secondary grid line for silver, and when cell piece is connected as component needs one A positive main gate line of cell piece is welded by the rear electrode of welding and adjacent cell piece, therefore the welding of main gate line is complicated, The high production cost of cell piece.

In the related technology, 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 2mm or more), and thus consumption silver content is big, cell piece High production cost.

In the related technology, the solar battery sheet with 3 main gate lines is proposed, but there are still consumption silver content and costs Height reduces transfer efficiency moreover, 3 main gate lines increase shading-area.

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 more wants 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 cell piece originally in the related technology Silver-colored main gate line replace with wire, such as copper wire, by copper wire and the welding of secondary grid line to derived current.Due to not using silver Main gate line, cost can be greatly reduced, simultaneously because the diameter of copper wire is smaller, can reduce shading-area, therefore, Ke Yijin One step promotes quantity to 10.This cell piece is properly termed as dereliction grid cell piece, wherein traditional sun is substituted in wire Silver-colored main grid and welding in energy cell piece.

Have in the related technology using the hyaline membrane and battery lamella swaging that will be adhesive with wire into wire and cell piece The technical solution of electrical connection, that is, more parallel wires are fixed on transparent film layer by way of bonding first, then will It is fitted on cell piece, contacts wire with the secondary grid line on cell piece finally by laminating technology.But because metal Silk is to be bonded and fixed on hyaline membrane by adhesive layer, and the fusing point of adhesive layer is generally lower, can be melted in lamination process adhesive layer Change or soften, therefore a degree of drift still can occur for wire.

But wire is fixed on hyaline membrane using adhesive layer, in lamination process, adhesive layer, which can melt, easily leads to gold Belong to silk to drift about, the photoelectric conversion efficiency for eventually leading to solar cell module reduces.

Therefore, in area of solar cell, the structure of solar battery is simultaneously uncomplicated, but each structure is more crucial, The preparation of main grid is since the factor of various aspects considers, such as shading surface, conductivity, equipment, technique, cost etc., causes it for too Difficult point and hot spot 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 batteries at 2007 or so by two main grid solar batteries, and a small amount of producer was in 2014 Left and right proposes the solar battery 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 does not have more mature product yet.

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

Present applicant proposes dereliction grid solar cell, which is not necessarily to that silver master is arranged on cell piece Grid line is reduced costs without welding, and can be commercialized, and simple easily realization, especially at low cost, equipment letter are prepared It is single, it can produce in batches, incident photon-to-electron conversion efficiency 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, cell piece, back side adhesive film and backboard, the cell piece have secondary grid line, the front adhesive film and the cell piece Between be equipped with transparent film layer, equipped with conductor wire, the conductor wire is embedding on the transparent film layer surface opposite with the cell piece Enter into the transparent film layer and expose out of described transparent film layer, the conductor wire be made of wire and with the secondary grid line It is connected, the fusing point of the transparent film layer is higher than the fusing point of the front adhesive film and the back side adhesive film.

It is transparent by being arranged between cell piece and front adhesive film according to the solar cell module of the embodiment of the present application Film layer, and be embedded in conductor wire in transparent film layer in advance during the preparation process, in this way can to avoid lamination during due to just The thawing of face adhesive film and back side adhesive film and the problem of cause wire to drift about, guarantee between conductor wire and secondary grid line Connective stability, to guarantee the photoelectric conversion efficiency of solar cell module.

According to the preparation method of the solar cell module of the application second aspect embodiment, comprising: will be by wire structure At conductor wire be fused in transparent film layer and the wire exposes out of described transparent film layer；By upper cover plate, front glue film Layer, the transparent film layer, cell piece, back side adhesive film and backboard are sequentially stacked, and are then laminated, to obtain solar battery Component, wherein the conductor wire is contacted with the secondary grid line of cell piece, and the fusing point of the transparent film layer is higher than the front adhesive film With the fusing point of the back side adhesive film.

Detailed description of the invention

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

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

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

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

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

Fig. 6 is the floor map according to the solar battery 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 battery chip arrays of the embodiment of the present application.

Fig. 9 is two cell pieces shown in Fig. 8 to be formed by connecting the schematic diagrames of solar battery 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 battery chip arrays of the application another embodiment.

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

Appended drawing 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；Positive pair grid line 312A；Back side pair grid line 312B；Edge pair grid line 3121；Intermediate pair 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 ontology 321；Connecting material layer 322；Short grid Line 33；

Back side adhesive film 40；

Lower cover plate 50；

Transparent film layer 60.

Specific embodiment

The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.

In this application, in order to more understand and be convenient for description, part term is explained below.

Term " cell piece 31 " includes battery sheet matrix 311, the secondary grid line 312 being located on 311 front of battery sheet matrix, sets Back electric field 313 at the back side of battery sheet matrix 311 and the back electrode 314 that is located on back electric field 313, as a result, secondary grid line 312 It is properly termed as the secondary grid line 312 of cell piece 31, back electric field 313 is referred to as the back 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 be as silicon wafer through process making herbs into wool, diffusion, etching edge, deposited silicon nitride layer The intermediate products obtained afterwards, it should be understood that battery sheet matrix 311 is not limited to be made of silicon wafer in the application, It can be other any suitable solar battery sheet matrixes 311.

In other words, cell piece 31 includes silicon wafer, to some process layers of silicon chip surface, the secondary grid line of light-receiving surface and shady face Back electric field 313 and back electrode 314 or equivalent not front electrode other class solar batteries.Term " battery unit " Including cell piece 31 and the conductor wire 32 being made of wire S.

Term " solar battery chip arrays 30 " includes that multiple cell pieces 31 are connected and by metal with by adjacent cell piece 31 The conductor wire 32 that silk S is constituted, in other words, solar battery chip arrays 30 are by multiple 31 rows of cell piece being connected by conductor wire 32 It arranges.

In solar battery chip arrays 30, wire S constitutes 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, can also Between the front of a cell piece 31 and the back side of another cell piece 31 that extend in adjacent 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 may include the positive secondary grid line 312 on the front for extend in one cell piece 31 and with one cell piece 31 The front side conductive line 32A of electrical connection, and extend on the back side of another cell piece 31 and with another described battery The back side conductor wire 32B that the back electrode 314 at the back side of piece 31 is electrically connected, part of the wire S between adjacent cell piece 31 It is properly termed as connection conductor wire.

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

All ranges disclosed in this application all include endpoint and can independently combine.Model disclosed herein The endpoint and any value enclosed is not limited to the accurate range or value, these ranges or value should be understood as including close to these models It encloses or the value of value.

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

The solar cell module 100 according to the embodiment of the present application is specifically described with reference to the accompanying drawing.

It as shown in Figures 1 to 12, include upper cover plate 10, front according to the solar cell module of the embodiment of the present application 100 Adhesive film 20, transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50.

Specifically, cell piece 31 has secondary 312 (outer unless expressly stated, described herein secondary grid line 312 of grid line Refer to the positive secondary grid line of cell piece), transparent film layer 60, the transparent film layer 60 are equipped between front adhesive film 20 and cell piece 31 The surface opposite with cell piece 31 is equipped with conductor wire 32, and conductor wire 32 is embedded into the transparent film layer 60 and from transparent film layer 60 Interior exposing, conductor wire 32 are made of wire S and are connected with secondary grid line 312, and the fusing point of transparent film layer 60 is higher than front adhesive film 20 and back side adhesive film 40 fusing point.

It in other words, include being sequentially stacked upper cover along the vertical direction according to the solar cell module of the embodiment of the present application 100 Plate 10, front adhesive film 20, transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50.Wherein, cell piece 31 includes Battery sheet matrix 311 and the secondary grid line 312 being located on 311 front of battery sheet matrix, in the front adhesive film 20 and the electricity Transparent film layer 60 is equipped between the upper surface (light-receiving surface of cell piece 31) of pond piece 31, the lower surface of the transparent film layer 60 is equipped with embedding Be located at the conductor wire 32 exposed in transparent film layer 60 and out of transparent film layer 60, conductor wire 32 be made of wire S and with pair Grid line 312 is connected.

Further, in some embodiments of the present application, on the secondary grid line 312 of the cell piece 31 with the conduction The connected position of line 32 is equipped with connecting material layer 322.Conductor wire 32 passes through the connection material being arranged on the secondary grid line of cell piece 31 The bed of material 322 is electrically connected with the formation of the secondary grid line 312 of cell piece 31.Wherein, the connecting material layer 322 is welding layer or conduction Glue；Preferably, the connecting material layer 322 is welding layer.By on the secondary grid line of cell piece 31 with the conductor wire phase Connecting material layer is arranged in position even, and the electrical contact performance of the secondary grid line of conductor wire and cell piece can be made more preferable.

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

Optionally, welding layer with a thickness of 1-20 microns, preferably 4-10 microns.The width of welding layer can be 10-300 Micron, preferably 30-120 microns.Further, the length of welding layer can be 0.1-2mm, it is preferred that the length of welding layer It can be 0.25-1mm.

Specifically, the alloy for forming welding layer can be with low-melting alloy.Such as can be tin alloy, tin alloy can be normal The tin alloy of rule, such as can be tin and the alloy selected from least one of Bi, Pb, Ag and Cu metal, specifically, such as SnBi, SnPb, SnBiCu, SnPbAg etc..Can occur in this way to avoid between the secondary grid line 312 and conductor wire 32 of cell piece 312 Rosin joint, so that the solar cell module finally prepared has relatively high incident photon-to-electron conversion efficiency.

More specifically, secondary grid line can be completely covered in the alloy-layer for forming welding layer when the articulamentum is welding layer 312, it can also partially cover secondary grid line 312.When the alloy-layer part for forming welding layer covers secondary grid line 312, alloy-layer is excellent Choosing is formed at the position welded on secondary grid line with conductor wire 32.Thickness, width and the length of welding layer can be in biggish models Enclose interior selection.Under preferable case, welding layer with a thickness of 4-10 microns, width is 30-120 microns, length 0.25-1mm.Shape Low-melting alloy at welding layer can be the low-melting alloy of this field routine, and fusing point can be 100-220 DEG C.

Under preferable case, the low-melting alloy contain Sn and in Bi, In, Ag, Sb, Pb and Zn at least one Kind, it is highly preferred that the low-melting alloy contains Sn, Bi and selected from least one of In, Ag, Sb, Pb and Zn.Specifically Ground, the low-melting alloy can close for Sn-Bi alloy, In-Sn alloy, Sn-Pb alloy, Sn-Bi-Pb alloy, Sn-Bi-Ag At least one of gold, In-Sn-Cu alloy, Sn-Bi-Cu alloy and Sn-Bi-Zn alloy.Most preferably, low-melting alloy is Bi-Sn-Pb alloy, for example, Sn content be 40 weight %, Bi contents be 55 weight % and Pb contents be 5 weight % alloy ( That is Sn40%-Bi55%-Pb5%).The thickness of low-melting alloy layer can be 0.001-0.06mm.

In some specific embodiments of the application, the low-melting alloy contain Sn, Bi and selected from In, Ag, Sb, At least one of Pb and Zn；Preferably, in the low-melting alloy, on the basis of the total weight of the alloy, the content of Bi Content for 15-60 weight %, Sn be 30-75 weight %, Cu content be 0-20 weight %, In content be 0-40 weight Measure %, it be the content of 0-20 weight %, Pb is containing for 0-10 weight % and Zn that the content of Ag, which is the content of 0-3 weight %, Sb, Amount is 0-20 weight %.It is further preferred that the low-melting alloy is selected from 50%Sn-48%Bi-1.5%Ag-0.5% At least one of Cu, 58%Bi-42%Sn and 65%Sn-20%Bi-10%Pb-5%Zn.

When solar cell module 100 is laminated, since the fusing point of transparent film layer 60 is higher than 20 He of front adhesive film The fusing point of back side adhesive film 40, in lamination process, in the case that in front, adhesive film 20 and back side adhesive film 40 are melted, Transparent film layer 60 will not melt, and ensure that the wire S being embedded in transparent film layer 60 will not drift about, so that The solar cell module 100 finally prepared has relatively high incident photon-to-electron conversion efficiency.

As a result, according to the solar cell module of the embodiment of the present application 100, pass through the upper surface (light in cell piece 31 Face) and front adhesive film 20 between transparent film layer 60 is set, and make conductor wire 32 in advance embedded in transparent film layer during the preparation process In 60, gold can be led to since front adhesive film 20 and back side adhesive film 40 melt to avoid during heating up lamination in this way Belong to the problem of silk drifts about, guarantees the connective stability between conductor wire 32 and secondary grid line 312, to guarantee solar battery The photoelectric conversion efficiency of component 100.

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 40 polyethylene octene elastomer (POE) of back side adhesive film and/or ethylene-vinyl acetate copolymer (EVA). In this application, polyethylene octene elastomer (POE) and ethylene-vinyl acetate copolymer (EVA) can be normal using this field It advises the product used or is prepared 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 field conventional technique selection and It determines, it is preferable that upper cover plate 10 and backboard 50 respectively can be transparent plate, such as glass plate.

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

It is understood that conductor wire 32 is embedding to be provided at front adhesive film and electricity in above-described embodiment of the application On transparent film layer 60 between the upper surface of pond piece 31, and between transparent film layer 60 and the upper surface of cell piece 31, the reality Applying the conductor wire 32 in example can be understood as the front side conductive line 32A of solar cell module 100, i.e. conductor wire 32 and an electricity The connected part of the positive secondary grid line of pond piece 31 constitutes the front side conductive line 32A of cell piece.

In some specific embodiments of the application, cell piece 31 is multiple to constitute battery chip arrays 30, adjacent electricity It is connected between pond piece 31 by more conductor wires 32.Conductor wire 32 is made of wire S, and wire S is electrically connected with cell piece 31, Wire S reciprocation extension constitutes conductor wire between the surface of adjacent cell piece 31.

When cell piece 31 is one another in series by wire S, one in adjacent cell piece 31 of wire S reciprocation extension Between the front of cell piece 31 and the back side of another cell piece 31.

In this embodiment, the lower surface of the back side adhesive film 40 and another cell piece 31 (cell piece 31 Shady face) between also be provided with transparent film layer 60, the transparent film layer 60 surface opposite with another cell piece 31 is equipped with The conductor wire 32, the conductor wire 32 are embedded into the transparent film layer 60 and expose out of this transparent film layer 60, the conduction Line 32 is connected with the back electrode 314 of another cell piece；314 phase of back electrode of conductor wire 32 and another cell piece Part even constitutes the back side conductor wire 32B of another cell piece.Preferably, the back electrode at the back side of another cell piece On 314 the position being connected with the conductor wire 32 be equipped with connecting material layer 322, the connecting material layer 322 be welding layer or Conducting resinl.Conductor wire 32 pass through the connecting material layer 322 that is arranged on the back electrode of another cell piece with it is described another The back electrode of a cell piece forms electrical connection.Wherein, the connecting material layer 322 is welding layer or conducting resinl；Preferably, described Connecting material layer 322 is welding layer, and the welding layer is low-melting alloy layer, and the low-melting alloy layer is the conjunction of above-mentioned low melting point Layer gold.

Specifically, in the solar cell module of the application 100, the front of cell piece 31 is equipped with front side conductive line 32A, The back side of another adjacent cell piece 31 is additionally provided with back side conductor wire 32B, is located at the positive front side conductive line 32A of cell piece 31 and electricity The secondary grid line 312 of pond piece 31 is connected, the back side conductor wire 32B and another adjacent cell piece positioned at another 31 back side of adjacent cell piece 31 back electrode 314 is connected.

In this application, conductor wire 32 (including front side conductive line 32A and back side conductor wire 32B) can pass through the side of welding Method is on transparent film layer 60.The method of welding may include: to be arranged in conductor wire 32 on the surface of transparent film layer 60, then (such as electric heating) is heated to conductor wire 32, the part softening or fusing for contacting transparent film layer 60 with conductor wire 32, thus Conductor wire 32 and transparent film layer 60 are welded and fixed on together.

Preferably, one end of conductor wire 32 can be arranged on the lower surface of transparent film layer 60, by the another of conductor wire 32 One end is arranged on the upper surface of another transparent film layer 60, is then heated (such as electric heating) to conductor wire 32, makes hyaline membrane The part softening or fusing that layer 60 is contacted with conductor wire 32, so that conductor wire 32 and transparent film layer 60 are welded and fixed on together. Then by the front of 60 one cell piece 31 of face of the transparent film layer of lower surface welding conductor wire, so that conductor wire 32 and an electricity The positive secondary grid line 312 of pond piece connects, and by another adjacent cell piece of 60 face of transparent film layer of upper surface welding conductor wire 31 back side, so that conductor wire 32 is connect with the back electrode 314 at the back side of another adjacent cell；Conductor wire 32 and a cell piece The connected part of positive secondary grid line constitute front side conductive line 32A, the back at the back side of conductor wire 32 and another adjacent cell piece The connected part of electrode constitutes back side conductor wire 32B.

Preferably, as shown in figure 13, the position being connected on the positive secondary grid line 312 of a cell piece 31 with conductor wire 32 It installs and is equipped with connecting material layer 322, be connected on the back electrode 314 at the back side of another adjacent cell piece 31 with conductor wire 32 Position, which is set, is also equipped with connecting material layer 322, and a cell piece 31 of the wire S reciprocation extension in adjacent cell piece 31 is just Conductor wire 32, the positive secondary grid line of conductor wire 32 and a cell piece are formed between face and the back side of another cell piece 31 312 form electrical connection by connecting material layer 322, and pass through connection material with the back electrode 314 at the back side of another adjacent cell piece The bed of material 322 forms electrical connection.

In some specific embodiments of the application, transparent film layer 60 is 160 DEG C or more of transparent material shape by fusing point At.When forming the fusing point of transparent material of transparent film layer is 160 DEG C or more, in lamination, the hyaline membrane will not hold completely Osmanthus or softening can preferably solve the technical issues of wire drifts about.

Preferably, transparent film layer 60 is by polyethylene terephthalate (PET), polybutylene terephthalate (PBT) (PBT) it is formed at least one of polyimides (PI).

In this application, the thickness of transparent film layer 60 can be 50-200 microns, namely positive positioned at cell piece 31 The thickness of bright film layer 60 and the transparent film layer 60 positioned at 31 back side of cell piece respectively can be 50-200 microns.Further Ground, to make solar cell module 100 show relatively high incident photon-to-electron conversion efficiency, the light transmittance of transparent film layer 60 is preferably not Lower than 90%.

In some specific embodiments of the application, cell piece 31 is multiple to constitute battery chip arrays 30, adjacent electricity It is connected between pond piece 31 by wire S, the surface of a cell piece 31 of the wire S reciprocation extension in adjacent cell piece 31 Between the surface of another cell piece 31.In this embodiment, wire S is preferably one.

It specifically, include multiple cell pieces 31 according to the solar battery chip arrays 30 of the embodiment of the present application.Adjacent cell It is connected between piece 31 by more conductor wires 32.Conductor wire 32 is made of wire S, and wire S is electrically connected with cell piece 31, gold Belong to silk S reciprocation extension between the surface of adjacent cell piece 31.

Here, cell piece 31 with electricity constituted by the conductor wire 32 that the wire S extended on 31 surface of cell piece is constituted In other words pool unit is made of according to the solar battery chip arrays 30 of the embodiment of the present application multiple battery units, multiple batteries The conductor wire 32 of unit is made of wire S of the reciprocation extension on the surface of adjacent cell piece 31.

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

In this application, " wire S reciprocation extension is 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 31 table of intermediate cell piece of predetermined quantity from the surface of first cell piece 31 Then face to the surface of the last one cell piece 31 returns from the surface of the last one cell piece 31 and extends through described predetermined The surface of the intermediate cell piece 31 of quantity to the surface of first cell piece 31 so repeats.

In addition, wire S can be with reciprocation extension in the front of cell piece 31 when cell piece 31 passes through wire S parallel connection On, in the case, wire S constitutes the front side conductive line 32A of cell piece, and optionally, wire S reciprocation extension is in cell piece On 31 front and different wire S reciprocation extensions is on the back side of cell piece 31, in the case, extends in cell piece 31 Wire S on front constitutes front side conductive line 32A, and the wire S for extending in the back side of cell piece 31 constitutes 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 extension Between the front of cell piece 31 and the back side of another cell piece 31, in the case, wire S a cell piece 31 just The part extended on face constitutes front side conductive line 32A, the part that wire S extends on the back side of another adjacent cell piece 31 Constitute 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 and extend " one reciprocal " forming two conductor wires 32, and two Root conductor wire 32 is formed by an one metal wire S coiling, 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 constituted, and is connected between adjacent cell piece 31 by conductor wire 32, and therefore, the conductor wire 32 of cell piece is without using valence The silver paste of lattice valuableness, and manufacturing process is simple, connects cell piece, the secondary grid line of wire S and cell piece without using welding Easy to connect with back electrode, the cost of cell piece substantially reduces.

Further, since conductor wire 32 is made of the wire S of reciprocation extension, (i.e. wire is in electricity for the width of conductor wire 32 The width of the projection of pond on piece) it can reduce, the shading-area of conductor wire 32 is reduced, moreover, the quantity of conductor wire 32 can be with It easily adjusts, compared with the main gate line that silver paste is formed, the resistance of conductor wire 32 reduces, and improves photoelectric conversion efficiency.Due to Wire S reciprocation extension forms 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 ", will not influence photoelectric conversion efficiency, further improves photoelectric conversion effect Rate.

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

It is further to note that in this application, conductor wire 32 can be by reciprocation extension on the surface of adjacent cell piece Between wire S formed, can also be formed by multiple wire spaced-apart relations parallel to each other and independent of each other.By that The technical solution that this independent multiple wire is spaced each other the main gate line to form traditional structure carrys out those skilled in the art Saying will be understood by, therefore be not described in detail.

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

With reference to Fig. 1-3 description according to the solar battery chip arrays 30 of one specific embodiment of the application.

In the embodiment shown in Fig. 1-3, two cell pieces 31 of solar battery 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 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. positive pair grid line 312A), the back electric field 313 being located on the back side of battery sheet matrix 311 and is located at and carries on the back electric field 313 On back electrode 314.In this application, it is to be understood that unless expressly stated otherwise, back electrode 314 can be tradition electricity The back electrode of pond piece, such as printed and formed by silver paste, it is also possible to the back side for the secondary grid line being similar on cell piece front side of matrix Secondary grid line 312B, or discrete multiple weld parts, in this application, unless expressly stated otherwise, secondary grid line refers to electricity Secondary grid line 312 on the front of pond sheet matrix 311.

As shown in Figure 1-3, in this embodiment, solar battery 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 extension is the first cell piece 31A's Front (light-receiving surface, the upper surface in Fig. 2) is between the back side of the second cell piece 31B, and it is electric to constitute first by wire S as a result, The back side conductor wire 32B of the front side conductive line 32A of pond piece 31A and the second cell piece 31B, wire S and the first cell piece 31A Secondary grid line electrical connection (such as welding or with conduction gluing knot) and be electrically connected with the back electrode of the second cell piece 31B.Some In embodiment, wire between the first cell piece 31A and the second cell piece 31B reciprocation extension 10-60 times to form 20-120 Root conductor wire, 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 Root, in other words, 24 conductor wires of single metal wire reciprocation extension 12 times formation, the spacing between adjacent conductive line can be 2.5 - 15 millimeters of millimeter.According to this embodiment, compared with the conductor wire of conventional batteries piece, quantity increases, to reduce electric current from pair Grid line reduces resistance to the distance of conductor wire, improves incident photon-to-electron conversion efficiency.In the embodiment shown in fig. 1, adjacent conductive Line forms U-shaped structure, is thus convenient for the coiling of wire.Optionally, the application is not limited to this, for example, adjacent conductive line V-shaped structure can be formed.

Wherein it should be noted that in this application, wire S refers to that reciprocation extension forms conductor wire on cell piece 31 32 wire, conductor wire 32 can be wire ontology 321, be also possible to include wire ontology 321 and being coated on metal The clad on 321 surface of silk ontology, i.e. wire S can be wire ontology 321, be also possible to include wire ontology 321 With the clad for being coated on 321 surface of wire ontology, the clad for being coated on 321 surface of wire ontology can be and connect Material layer as material layer 322.In the application, it is preferable that wire S is wire ontology 321.In addition, the application's In embodiment, if wire refers to the wire S of the reciprocation extension formation conductor wire 32 on cell piece 31 without specified otherwise.It is excellent Selection of land, connecting material layer 322 are welding layer or conducting resinl, and welding layer can be above-mentioned alloy-layer.

In some embodiments it may be preferred that wire ontology 321 is copper wire, i.e. wire S may be copper wire, i.e., golden Belong to silk S and be free of clad, but the application is not limited to this, such as wire 321 or aluminium wire, in the application, it is preferable that Wire S is copper wire.Preferably, wire S has circular cross section, and more sunlights can be irradiated to cell piece as a result, On matrix, photoelectric conversion efficiency is further increased.

In some embodiments it may be preferred that wire is reciprocal in a tensioned state before wire is contacted with cell piece Extend, i.e., wire is straightened, after the secondary grid line and back electrode with cell piece are connect, the tensioning of wire can be discharged Thus power further avoids the conductor wire when preparing solar cell module and drifts about and influence photoelectric conversion efficiency.

In some specific embodiments of the application, the width of secondary grid line 312 is 40-80 microns, micro- with a thickness of 5-20 Rice, secondary grid line 312 is 50-120 item, and the spacing of adjacent two secondary grid lines 312 is 0.5-3mm.The pair grid line 312 as a result, More reasonable structure, has bigger Shouguang area, and photoelectric conversion efficiency is higher.

Preferably, the binding force between wire and cell piece 31 is in the range of 0.1-0.8 newton.That is, leading Binding force between electric wire 32 and cell piece 31 is between 0.1-0.8 newton.Preferably, the knot between wire and cell piece 31 Resultant force is in the range of 0.2-0.6 newton.Firm welding between cell piece and wire as a result, cell piece are being operated and were being shifted The problem of being less prone to desoldering in journey, being less prone to poor contact and performance is caused to 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 front of the first cell piece 31A and the front of the second cell piece 31B, and wire forms the first electricity as a result, The front side conductive line of the front side conductive line of pond piece 31A and the second cell piece 31B, in the case, the first cell piece 31A and second Cell piece 31B is connected in parallel to each other, it is, of course, understood that preferably, the back electrode and the second cell piece of the first cell piece 31A The back side conductor wire that the back electrode of 31B can also be formed by another wire reciprocation extension is connected, optionally, the first cell piece The back electrode of the back electrode of 31A and the second cell piece 31B can also be connected by traditional mode.

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 the pair grid line 312 includes the intermediate secondary grid intersected with the conductor wire Line and the edge pair grid line not intersected with the conductor wire, the short grid line 33 are connected with the edge pair grid line, and described short Grid line and the conductor wire or at least one intermediate secondary grid line are connected.Preferably, short grid line 33 is perpendicular to secondary grid line 312.

It, in this way can be with as a result, by the way that short grid line 33 is arranged on the secondary grid line 312 of the edge portions of 31 light-receiving surface of cell piece It avoids the secondary grid line 312 due to the edge portions for being unable to reach cell piece 31 during 32 coiling of conductor wire arrangement and causes Portion of electrical current waste, so as to further increase the incident photon-to-electron conversion efficiency of solar cell module 100.

Below with reference to Fig. 6 description according to the solar battery chip arrays 30 of another embodiment of the application.

It include n × m cell piece 31, in other words, Duo Ge electricity according to the solar battery chip arrays 30 of the embodiment of the present application Pond piece 31 is arranged into the matrix form of n × m, and wherein n is columns, and m is number of rows.More specifically, in this embodiment, 36 batteries Piece 31 is arranged in 6 column and 6 rows, i.e. n=m=6.It is understood that the application is not limited to this, for example, number of rows and columns can With unequal.For convenience, in Fig. 6, the cell piece 31 in direction from left to right, 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, surface and adjacent another battery of the wire reciprocation extension in a cell piece 31 Between the surface of piece 31, in adjacent two rows of cell pieces 31, a cell piece 31 of the wire reciprocation extension in a row Between surface and the surface of a cell piece 31 in a+1 row, and m-1 >=a >=1.

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

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

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

The front of the 6th cell piece 31 in six roots of sensation wire reciprocation extension first row and the in adjacent second row Between the back side between six cell pieces 31, first row and second row are one another in series as a result, the 7th one metal wire reciprocation extension second Between the back side in the front of the 6th cell piece 31 in row and second row between the 5th cell piece 31, the 8th one metal wire is reciprocal Extend between the back side in the front and second row of the 5th cell piece 31 in second row between the 4th cell piece 31, until the tenth Back 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 third row first Between the back side between cell piece 31, thus second row is one another in series with third row.Then, successively third row and the 4th row are gone here and there Connection, the 4th row connect with the 5th row, and the 5th row connects with the 6th row, thus complete the preparation of battery chip arrays 30, implement herein Example in, the left side and the 6th row of the first cell piece 31 of first row the first cell piece 31 left side be arranged busbar, one Busbar connects the conductor wire extended from the left side of the first cell piece 31 of first row, and 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 It is all made of conductor wire between two rows, third row, the 4th row, the 5th row and the 6th row and realizes series connection, as shown, optionally, Can between second row and third row, it is in parallel for preventing the diode of spottiness, two poles between the 4th row and the 5th row The connection of pipe can be using well known to a person skilled in the art technologies, such as busbar.

However, the application is not limited to this, for example, can connect between first row and second row, third row and the 4th row Series connection, the 5th row and the 6th row series connection, while second row and third row are in parallel, the 4th row and the 5th row are in parallel, in the case, Busbar can be respectively set in the left or right side setting accordingly arranged.

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

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

In some specific embodiments of the application, the size for conventional cell piece is 156mm × 156mm；Too It is positive can the open-circuit voltage of battery component be 37.5-38.5V/60 piece, 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 specific embodiments of the application, the fill factor of solar cell module is 0.79-0.82, no It is influenced by the size and number of cell piece, influences the electrical property of battery.

In some specific embodiments of the application, the size for conventional cell piece is 156mm × 156mm；Too The operating voltage of positive energy battery component is 31.5-32V/60 piece, and 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 specific embodiments of the application, the size for conventional cell piece is 156mm × 156mm；Too The transfer efficiency of positive energy battery component is 16.5-17.4%.Power is 265-280W/60 piece.

Below with reference to Fig. 7-9 description according to the preparation method of the solar cell module 100 of the embodiment of the present application.

Preparation method according to the solar cell module 100 of the embodiment of the present application includes that will be made of first wire Conductor wire is fused in transparent film layer and wire exposes out of transparent film layer.

Then by upper cover plate 10, front adhesive film 20, transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50 It is sequentially stacked, is then laminated, to obtain solar cell module 100, wherein the secondary grid line of conductor wire 32 and cell piece 31 312 contacts, the fusing point of transparent film layer 60 are higher than the fusing point of front adhesive film 20 and back side adhesive film 40.

In other words, in the preparation according to the solar cell module of the application 100, first conductor wire 32 can be arranged in On the surface of bright film layer 60, (such as electric heating) then is heated to conductor wire 32, contacts transparent film layer 60 with conductor wire 32 Part softening or fusing, so that conductor wire 32 and transparent film layer 60 are welded and fixed on together, and make wire from transparent Expose in film layer 60.

Then by upper cover plate 10, front adhesive film 20, transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50 Be sequentially stacked, the positive secondary grid line 312 of cell piece 31 is directly contacted with conductor wire 32, after by upper cover plate 10, front adhesive film 20, Transparent film layer 60, cell piece 31, back side adhesive film 40 and backboard 50, which carry out lamination, can be obtained the above-mentioned solar-electricity of the application Pond component 100.

Specifically, as shown in fig. 7, in a tensioned state, by after wire reciprocation extension 12 times with 60 welding of transparent film layer. Then, as shown in figure 8, preparing the first cell piece 31A and the second cell piece 31B.Next, as shown in figure 9, by the first cell piece The front of 31A is connected with wire and the back side of the second cell piece 31B is connected with wire, and battery chip arrays are consequently formed Two cell pieces 31 are shown in 30, Fig. 9, as above, when battery chip arrays 30 have multiple cell pieces 31, utilize reciprocation extension Wire the front of one cell piece 31 is connected with the back side of another adjacent cell piece 31, i.e., by a cell piece 31 Secondary grid line be connected with the back electrode of another cell piece 31 with wire.Wire is by being located at two ends of this root silk Two clips be tensioned lower reciprocation extension.In the embodiment shown in fig. 9, adjacent cell piece is one another in series, as above, according to need It wants, adjacent cell piece can be connected in parallel to each other by wire.

By the battery chip arrays 30 being prepared and upper cover plate 10, front adhesive film 20, transparent film layer 60, battery chip arrays 30, back side adhesive film 40 and backboard 50 are sequentially stacked, and make the front of cell piece 31 on transparent film layer 60, transparent film layer 60 Conductor wire 32 contacted with the secondary grid line 312 on cell piece 31, the back side of cell piece 31 faces back side adhesive film 40, then carries out Lamination obtains solar cell module 100.The solar cell module 100 of the application is described below with reference to specific example.

Example 1

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

(1) wire S is prepared

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

Make copper wire in the state reciprocation extension of tension, copper wire is opened by being located at two clips of this two end of root silk Tightly lower reciprocation extension, to form 15 parallel wire S, and the distance between the adjacent wire S being parallel to each other is 9.9mm。

Then a part of wire S is arranged on the surface for the transparent film layer that PET film is prepared, then to metal Silk S is heated, and the part softening or fusing of transparent film layer and wire S contact are made, thus by the part metals silk S with it is transparent Film layer is welded and fixed on together, and exposes wire S out of transparent film layer.

(2) solar cell module 100 is prepared

POE adhesive film (melt temperature is 65 DEG C) having a size of 1630 × 980 × 0.5mm is provided, and ruler is correspondingly provided It is very little be 1633 × 985 × 3mm glass plate and 60 chip sizes be 156 × 156 × 0.21mm polycrystalline silicon battery plate.Cell piece tool There are 91 secondary grid lines (material is silver, and width is 60 microns, with a thickness of 9 microns), every secondary grid line substantially runs through in the longitudinal direction Cell piece, and the distance between adjacent pair grid line is 1.7mm, is needed on secondary grid line by the method for silk-screen printing and conductor wire One layer of Sn40%-Bi55%-Pb5% alloy-layer is arranged in connected position.The back side of cell piece has 5 back electrodes, and (material is Tin, width is 1.5 millimeters, with a thickness of 10 microns), every back electrode substantially runs through cell piece, and adjacent two in the longitudinal direction The distance between back electrode is 31mm.

60 cell pieces are arranged (6 rows 10 column) with a matrix type, in same row and in two adjacent cell pieces Between, the welding transparent film layer of conductor wire, and the secondary grid line and conductor wire of the cell piece are placed in the front of a cell piece Contact, the back electrode that another part conductor wire of non-welding protrudes into the back side of another cell piece are connected.

Then, by upper glass plates, upper POE adhesive film, in the matrix form arrange and be connected with wire multiple cell pieces, Lower POE adhesive film and lower glass plate successively stack from top to bottom, wherein and so that the light-receiving surface of cell piece is faced front adhesive film 20, Make the back side of cell piece in face of back side adhesive film 40, be subsequently placed into laminating machine and be laminated, so that solar battery group be made Part A1.

Comparative examples 1

Comparative examples 1 and the difference of example 1 are: cell piece being arranged with a matrix type, 15 are cascaded Wire paste in transparent adhesive tape film layer, wire is pasted in solar battery on piece, between two adjacent cell pieces, Wire connect cell piece front and another cell piece the back side then, by upper glass plates, upper POE adhesive film, thoroughly Gelatin film layer, in the matrix form arrange and be connected with wire multiple cell pieces, transparent adhesive tape film layer, lower POE adhesive film and under Glass plate successively stacks from top to bottom.To which solar cell module D1 be made.

Example 2

Solar cell module is prepared according to the method for example 1, the difference with example 1 is: in the light-receiving surface of cell piece Secondary grid line 312 on short grid line 33 is set (material is silver, width 0.1mm), and the short grid line 33 is vertical with secondary grid line 312, use In the secondary grid line 312 and conductor wire 32 of the edge portions of the light-receiving surface of connection cell piece, as shown in figure 12, so that solar energy be made Battery component A2.

Example 3

Prepare solar cell module according to the method for example 1, the difference with example 1 is: 6 rows 6 column cell piece it Between connection type are as follows: between adjacent two rows of cell pieces, conductor wire from a (a >=1) arrange in an end cell piece Light-receiving surface extend and with a+1 row in adjacent end portion cell piece the back side formed be electrically connected, for realizing adjacent two rows Connection between cell piece, and be used to connect the conductor wire of adjacent two rows of cell pieces and be used to connect adjacent cell piece in this two rows Conductor wire be mutually perpendicular to arrange.So obtained solar cell module A3.

Test case 1

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

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

As a result as shown in table 1 below.

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

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

In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy Fixed orientation construction and operation, therefore be not considered as limiting the invention.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more, Unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be Concrete meaning in bright.

In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower" It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above " Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists Second feature " under ", " lower section " and " following " include fisrt feature right above second feature and oblique upper, or be merely representative of First feature horizontal 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 spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any One or more embodiment or examples in can be combined in any suitable manner.

Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.

Claims (35)

1. a kind of solar cell module, which is characterized in that including the upper cover plate, front adhesive film, cell piece, back being sequentially stacked Face adhesive film and backboard, the cell piece have secondary grid line, hyaline membrane are equipped between the front adhesive film and the cell piece Layer, the transparent film layer surface opposite with the cell piece are equipped with conductor wire, and the conductor wire is embedding by the method for welding Enter into the transparent film layer and expose out of described transparent film layer, the conductor wire be made of wire and with the secondary grid line It is connected, the fusing point of the transparent film layer is higher than the fusing point of the front adhesive film and the back side adhesive film.

2. solar cell module according to claim 1, which is characterized in that on the positive secondary grid line of the cell piece It is equipped with connecting material layer in the position being connected with the conductor wire, the connecting material layer is welding layer or conducting resinl.

3. solar cell module according to claim 2, which is characterized in that the wire is copper wire.

4. solar cell module according to claim 1 to 3, which is characterized in that the transparent film layer is by melting Point is formed for 160 DEG C or more of transparent material.

5. solar cell module according to claim 2, which is characterized in that the welding layer is alloy-layer, the conjunction The fusing point of layer gold is 100-220 DEG C.

6. solar cell module according to claim 2, which is characterized in that the welding layer contains Sn, Bi and choosing From at least one of Cu, In, Ag, Sb, Pb and Zn metal.

7. solar cell module according to claim 2, which is characterized in that the welding layer it is micro- with a thickness of 1-20 Rice；The width of the welding layer is 10-300 microns；The length of the welding layer is 0.1-2mm.

8. solar cell module according to claim 1, which is characterized in that the transparent film layer is by poly terephthalic acid The formation of at least one of glycol ester, polybutylene terephthalate (PBT) and polyimides.

9. solar cell module according to claim 1, which is characterized in that the transparent film layer with a thickness of 50-200 Micron, light transmittance are not less than 90%.

10. solar cell module according to claim 1, which is characterized in that the cell piece is multiple to constitute electricity Pond chip arrays are connected between adjacent cell piece by the wire, and the wire reciprocation extension is in adjacent cell piece Between the surface of one cell piece and the surface of another cell piece.

11. solar cell module according to claim 10, which is characterized in that the wire is in one battery Reciprocation extension between the front of piece and the back side of another cell piece.

12. solar cell module according to claim 11, which is characterized in that the back side adhesive film and described another Transparent film layer also is provided between a cell piece, the transparent film layer surface opposite with another described cell piece is equipped with described Conductor wire, the conductor wire are embedded into the transparent film layer by the method for welding and are exposed out of described transparent film layer, institute Conductor wire is stated to be connected with the back electrode of another cell piece.

13. solar cell module according to claim 12, which is characterized in that the back side of another cell piece It is equipped with connecting material layer in the position being connected with the conductor wire on back electrode, the connecting material layer is welding layer or conduction Glue.

14. solar cell module according to claim 11, which is characterized in that the conductor wire from an one metal wire toward After-combustion system forms.

15. solar cell module according to claim 11, which is characterized in that the wire reciprocation extension 10-60 It is secondary.

16. solar cell module according to claim 11, which is characterized in that between adjacent two conductor wires Spacing is 2.5-15mm.

17. solar cell module described in any one of 1-16 according to claim 1, which is characterized in that adjacent two conductions Line forms U-shaped structure or v-shaped structure.

18. solar cell module according to claim 1, which is characterized in that the front of the cell piece has short grid Line and secondary grid line, the pair grid line include the intermediate secondary grid line intersected with the conductor wire and the side that do not intersect with the conductor wire Edge pair 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 in Between secondary grid line be connected.

19. solar cell module according to claim 18, which is characterized in that the short grid line is perpendicular to the secondary grid Line.

20. solar cell module according to claim 1, which is characterized in that the cell piece is arranged into the square of n × m Formation formula, wherein n is columns, and m is number of rows,

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

21. solar cell module according to claim 20, which is characterized in that described in adjacent two rows of cell pieces Electricity of the wire reciprocation extension on the surface and an end for being located at a+1 row of the cell piece for an end for being located at a row Between the surface of pond piece, the end of a row is located at the same of the matrix with the end that the a+1 is arranged Side.

22. solar cell module according to claim 21, which is characterized in that in same row's cell piece, the gold Belong to silk reciprocation extension in the positive between the back side of another adjacent cell piece of cell piece,

In adjacent two rows of cell pieces, the wire reciprocation extension is being located at the cell piece of the end of a row just Between face and the back side of a cell piece positioned at the end of a+1 row, with adjacent two rows of cell pieces of connecting.

23. the solar cell module according to any one of claim 20-22, which is characterized in that reciprocation extension is same Wire between the adjacent cell piece of one row is one, and wire of the reciprocation extension between the cell piece of adjacent row is one Root.

24. solar cell module according to claim 1, which is characterized in that the width of the pair grid line is that 40-80 is micro- Rice, with a thickness of 5-20 microns, the pair grid line is 50-120 item, and the spacing of adjacent two secondary grid lines is 0.5-3mm.

25. a kind of preparation method of solar cell module characterized by comprising

The conductor wire being made of wire is fused in transparent film layer and the wire exposes out of described transparent film layer；

Upper cover plate, front adhesive film, the transparent film layer, cell piece, back side adhesive film and backboard are sequentially stacked, then carried out Lamination, to obtain solar cell module, wherein the conductor wire is contacted with the secondary grid line of cell piece, the transparent film layer Fusing point is higher than the fusing point of the front adhesive film and the back side adhesive film.

26. the preparation method of solar cell module according to claim 25, which is characterized in that by institute before stacked Wire is stated to be fused on the transparent film layer.

27. the preparation method of solar cell module according to claim 25, which is characterized in that the conductor wire and institute State secondary grid line be connected to it is stacked before or after carry out or the conductor wire and the pair grid line are connected to the same of lamination Shi Jinhang.

28. the preparation method of the solar cell module according to any one of claim 25-27, which is characterized in that institute Wire reciprocation extension is stated between the surface of a cell piece and the surface of another cell piece in adjacent cell piece.

29. the preparation method of solar cell module according to claim 28, which is characterized in that the wire is in institute State reciprocation extension between the front an of cell piece and the back side of another cell piece.

30. the preparation method of solar cell module according to claim 28, which is characterized in that the conductor wire is by one The reciprocal coiling of one metal wire forms.

31. the preparation method of solar cell module according to claim 28, which is characterized in that the wire is reciprocal Extend 10-60 times.

32. the preparation method of solar cell module according to claim 25, which is characterized in that adjacent two conductor wires Form U-shaped structure or v-shaped structure.

33. the preparation method of solar cell module according to claim 25, which is characterized in that the transparent film layer by Fusing point is that 160 DEG C or more of transparent material is formed.

34. the preparation method of solar cell module according to claim 25, which is characterized in that the transparent film layer by The formation of at least one of polyethylene terephthalate, polybutylene terephthalate (PBT) and polyimides.

35. the preparation method of solar cell module according to claim 25, which is characterized in that the transparent film layer With a thickness of 50-200 microns, light transmittance is not less than 90%.