CN106206807A - Solaode chip arrays, solar module and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of solaode chip arrays, solar module and preparation method thereof, solaode chip arrays includes multiple cell piece, it is connected by multiple conductor wires between adjacent cell sheet, multiple conductor wires are made up of tinsel, between surface and the surface of another cell piece of at least one one metal wire cell piece in adjacent cell sheet reciprocation extension and after tinsel and welding of battery film at the place of turning back wiry disconnection tinsel.Solaode chip arrays according to embodiments of the present invention, by conductor wire is made up of the tinsel of reciprocation extension, tinsel uses coiling arrangement mode reciprocation extension between adjacent two cell pieces to form collapsed shape, the conductor wire of this structure is not only simple to manufacture, low cost, and be conducive to improving the photoelectric transformation efficiency of solaode chip arrays.

Description

Solaode chip arrays, solar module and preparation method thereof

Technical field

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

Background technology

Solar module is one of vitals of device of solar generating.Sunlight enters electricity from cell piece body front Pond, the main grid in front and secondary grid can block a part of cell piece body, impinge upon the luminous energy on electrode and cannot be transformed into electric energy, because of This, need main grid the thinnest more good with what secondary grid did.But, the effect of main grid and secondary grid is to conduct electric current, from resistivity Angle analysis, main grid and secondary grid more detailed rules and regulations conduction cross-sectional area are the least, and ohmic loss is the biggest.Therefore main grid and secondary grid design are Balance, cost to be considered is obtained between shading and conduction.

Summary of the invention

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

In correlation technique, the front of solar battery sheet is usually provided with main gate line and secondary grid line, is used for deriving cell piece and passes through Electric current produced by photoelectric effect or Photochemical effects.In order to improve the efficiency of cell piece, current solaode manufacturer All it is being devoted to study how to improve the quantity of main gate line.Main grid is successfully brought up to 3 from 2 by prior art, Even improve to 5.

But, in prior art, main gate line is to be mainly composed of the slurry of expensive silver by printing to be prepared from, Therefore, its preparation cost is the highest, and the radical increasing silver main gate line necessarily causes the increase of cost.Meanwhile, existing silver is main The width of grid line is big (such as, width reaches more than 2mm), and the radical increasing silver main gate line also can increase to shading-area, causes The conversion efficiency of cell piece reduces.

Therefore, from reducing cost, the angle of minimizing shading-area, correlation technique will be printed on cell piece originally Silver main gate line replaces with tinsel, such as copper wire, is welded with secondary grid line by copper wire, and then copper wire is as main gate line derived current. Owing to not in use by silver main gate line, its cost can be greatly reduced, simultaneously because the diameter of copper wire is less, it is possible to reduces shading Area, therefore, it can further the quantity of main gate line be risen to 10.This cell piece is properly termed as many main grids cell piece Or dereliction grid cell sheet..

Present inventor finds through long-term research experiment, pulls out many parallel tinsels, so if used simultaneously After many one metal wires are cut off, more one metal wires fixing preparation method being soldered on cell piece simultaneously is prepared cell piece, This kind of mode is due to equipment and the restriction of preparation precision, technique etc., such as, due to the effect of stress, solar battery sheet is certainly By when placing under state, there is certain bending, it is therefore desirable to tinsel keeps certain rate of tension cell piece could be flattened (it is demonstrated experimentally that for the copper wire of string diameter 0.2mm, its minimum tensile force 2N to be had).For keeping this tensile force, Needing to arrange the device of similar clip at every one metal wire two ends, this device needs to take certain space, and the sky of cell piece Between be limited, therefore, prior art at most can only pull out at present on a cell piece simultaneously and 10 left sides of fixing welding Right tinsel, if it is desired to being further added by radical wiry will be extremely difficult.Because tinsel radical is the most, it is certainly The most by holding, equipment needs to control more tinsel simultaneously, and wire-drawing equipment is required the highest by this.Meanwhile, solaode The limited space of sheet, such as, the size of general single battery sheet is 156mm*156mm, needs in the most limited space The most accurately controlling many one metal wires, this is the highest to equipment requirements, especially the highest to required precision.Therefore current In actual production, can not control the most simultaneously and weld many one metal wires, by increasing capacitance it is possible to increase the radical of conductor wire still have Limit, general the most only about 10, and realize difficulty.

In order to solve this problem, Patents (US20100275976, and US20100043863) proposes one will Many one metal wires are fixed on the technical scheme on transparent film layer.I.e., first many parallel tinsels are consolidated by the way of bonding It is scheduled on transparent film layer, then fits on cell piece, finally by layer by being bonded with many parallel hyaline membranes wiry Pressure technique makes tinsel contact with the secondary grid line on cell piece.The program fixes many one metal wires by transparent film layer, solves The problem simultaneously controlling many one metal wires, can increase radical wiry further, but this scheme has almost abandoned welding Technique, i.e. tinsel are connected with secondary grid line not by welding procedure, but make tinsel and secondary grid line by laminating technology Contact, thus derived current.

Although this scheme can promote radical wiry further, but, due to the existence of transparent film layer, light can be affected Absorb, cause certain shading, thus cause the reduction of conversion efficiency.

The more important thing is, this employing transparent film layer fix scheme wiry be cannot use welding procedure connect tinsel with Secondary grid line.This is because, on the one hand, if using welding procedure, the fusion temperature of transparent film layer have to be higher than welding Temperature (welding temperature is typically at about 140 DEG C).Otherwise, if the fusion temperature of transparent film layer is less than welding temperature, in weldering When connecing, adhesive film can melt, thus lose it and fix effect wiry, and tinsel can drift about, and is substantially reduced Welding effect.

On the other hand, as well known to those skilled in the art, solar battery sheet needs to be in sealing state in use, to prevent Water, air etc. enter in cell piece, result in burn into short circuit etc.；And existing encapsulating material is generally EVA, it melts Point generally 70-80 DEG C, well below welding temperature.If employing welding procedure, as it has been described above, the fusing of transparent film layer Temperature needs higher than welding temperature, and its inevitable fusing point also above encapsulating material, therefore encapsulation when, in package temperature Under, encapsulating material (EVA) melts, and transparent film layer will not melt, thus, when encapsulation, the encapsulation of fusing Material is the adhesive film that cannot pass through solid, thus cell piece is completely sealed off, therefore, its sealing effectiveness is excessively poor, Actual product is easy to lose efficacy.Therefore, for the angle of encapsulation, need again the fusion temperature of transparent film layer less than welding temperature Degree, this is clearly an antinomy.

Therefore, this employing adhesive film fixes scheme wiry is to use welding procedure to be welded with secondary grid line by tinsel Together, its tinsel only actually simply contacts with the secondary grid line on cell piece, i.e. tinsel simply rides over On secondary grid line.Therefore, the bonding strength of tinsel and secondary grid line is the lowest, in lamination process or during use, and gold Belong to and be very easy to depart between silk and secondary grid line, cause loose contact, thus cause the efficiency of cell piece to be greatly lowered, Even lost efficacy.Therefore, the most real being promoted and commercialization of product of this scheme is used.Therefore, in the market The most ripe dereliction grid solar cell.

It is contemplated that solve one of above-mentioned technical problem the most to a certain extent.

The present invention provides a kind of dereliction grid solar cell, and the conductive line number that its cell piece can be arranged can not only improve to 20 More than bar, the most.The present invention forms conductor wire by radical less tinsel reciprocation extension, decreases free end, I.e. decrease the tinsel radical needing to control, solve the problem that space limits, but can arrange on cell piece and more lead Electric wire, and easily realize welding between a plurality of conductor wire with cell piece pair grid line.Meanwhile, the present invention provide without main grid In solaode, owing to conducting electricity between filament and the secondary grid line of cell piece by being welded together, its connection is non- The most reliable, preparation is simple easily to be realized, and good seal performance, efficiency is high, it is possible to fully meet actual operation requirements and energy Enough commercial produce.

Specifically, the application proposes a kind of solaode chip arrays, and this solaode chip arrays is simple to manufacture, low cost, Photoelectric transformation efficiency is high.

The application also proposes a kind of solar module with above-mentioned solaode chip arrays, this solar module Be simple to manufacture, low cost, photoelectric transformation efficiency is high.

The application also proposes the preparation method of a kind of above-mentioned solar module.

The solaode chip arrays of embodiment according to a first aspect of the present invention, including multiple cell pieces, between adjacent cell sheet Being connected by multiple conductor wires, the plurality of conductor wire is made up of tinsel, and at least described tinsel is at adjacent cell sheet In a cell piece surface and the surface of another cell piece between reciprocation extension and at described tinsel and described cell piece Disconnect described tinsel at the described place of turning back wiry after welding.

Solaode chip arrays according to the embodiment of the present application, by conductor wire is made up of the tinsel of reciprocation extension, gold Belonging to silk uses coiling arrangement mode reciprocation extension between adjacent two cell pieces to form collapsed shape, then with welding of battery film, Disconnect the tinsel of above-mentioned reciprocation extension after welding at the place of turning back wiry, the conductor wire of this structure is not only simple to manufacture, and becomes This is low, and firm welding, high with the adhesion of cell piece, be conducive to improving the opto-electronic conversion effect of solaode chip arrays Rate.

Tinsel disconnects at the place of turning back simultaneously, it is possible to reduce tinsel is at the stress of bending part, it is ensured that welding effect.

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

The preparation method of the solar module of embodiment according to a third aspect of the present invention, including: by tinsel reciprocation extension At least two conductor wires are formed between surface and the surface of another cell piece of a cell piece in adjacent cell sheet, Being welded with the secondary grid line on the front of described cell piece by tinsel, the most adjacent cell piece is by described a plurality of conductor wire even Connect；Described tinsel is disconnected to obtain cell piece array at the described place of turning back wiry；By upper cover plate, front adhesive film, Described cell piece array, back side adhesive film and backboard stack successively, and make the front of described cell piece in the face of described front glued membrane Layer, described cell piece the back side in the face of back side adhesive film, then carry out lamination and obtain solar module.

The application uses the electrical connection of the method for coiling, the most more conducively tinsel and cell piece, and switching performance is good to be especially beneficial Tinsel welds with cell piece, does not haves the situations such as a large amount of conductor wire rosin joints that a large amount of conductor wire causes when a root bead connects, The solar battery sheet of preparation is the most attractive in appearance, and performance is good.And the suitable conductor wire of bar number can be prepared, only need to use Two tension clips, are not limited by a space, and preparation technology the most easily realizes, and equipment and technique the simplest, it is easy to technology.

Accompanying drawing explanation

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

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

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

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

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

Fig. 6 is the front plan schematic diagram of the solaode chip arrays according to the another embodiment of the application.

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

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

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

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

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

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

Figure 13 is that in one embodiment of the application, two cell pieces are formed by connecting by tinsel the signal of solaode chip arrays Figure.

Figure 14 is the schematic diagram after solaode chip arrays shown in Figure 13 cuts off tinsel.

Figure 15 is that in another embodiment of the application, two cell pieces are formed by connecting the showing of solaode chip arrays by tinsel It is intended to.

Figure 16 is the schematic diagram after solaode chip arrays shown in Figure 15 cuts off tinsel.

Figure 17 is the wire in tension schematic diagram of comparative example 1.

Figure 18 is the bar number of conductor wire and the relation of photoelectric transformation efficiency in the solaode chip arrays according to the embodiment of the present application Curve chart.

Reference:

Cell piece assembly 100；

Upper cover plate 10；

Front adhesive film 20；

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

Conductor wire 32 (32C)；Front side conductive line 32A；Back side conductor wire 32B；Tinsel body 321；Weld layer 322； Cut off position 323；Short grid line 33；Clip 34；

Back side adhesive film 40；

Lower cover 50.

Detailed description of the invention

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

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

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

" cell piece matrix 311 " such as can be by silicon chip after the operations such as making herbs into wool, diffusion, etching edge, deposited silicon nitride layer The intermediate products obtained, it should be understood that in the application, cell piece matrix 311 is not limited to be made up of silicon chip.

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

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

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

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

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

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

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

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

As shown in Figures 1 to 12, include multiple cell piece 31 according to the solaode chip arrays of the embodiment of the present application, adjacent Being connected by multiple conductor wires 32 between cell piece 31, multiple conductor wires 32 are made up of tinsel, and at least one one metal wire exists Reciprocation extension and at metal between surface and the surface of another cell piece 31 of a cell piece 31 in adjacent cell sheet 31 Silk weld with cell piece 31 after the place of turning back wiry disconnection tinsel.

In other words, it is made up of at least two cell piece 31 according to the solaode chip arrays of the embodiment of the present application, adjacent two Be connected by a plurality of conductor wire 32 between cell piece 31, at least two conductor wires 32 by reciprocation extension at adjacent two cell pieces Tinsel between 31 is constituted, and the tinsel of reciprocation extension disconnects gold with cell piece 31 after welding at the place of turning back wiry Belong to silk and form multiple relatively independent conductor wire.

It is to say, in this application, tinsel on the surface of the surface of a cell piece 31 and another cell piece 31 it Between weld with cell piece 31 after reciprocation extension, and tinsel is from the surface of a cell piece 31 and another battery Necessarily forming bending between the surface of sheet 31 during reciprocation extension, these bendings are disconnected after tinsel welds with cell piece 31 Open.

The present invention do not limit to all of conductor wire by tinsel coiling weld after disconnect formed, can part by tinsel around Disconnect after system welding and being formed, it is also possible to all, reciprocation extension can be the most once, and the terminating point of reciprocation extension does not the most limit System, starting point and ending point can be on same cell piece, it is also possible to is on different cell pieces, as long as containing around i.e. Can.

Specifically, in the preparation, dogleg section wiry is positioned at cell piece 31 to the solaode chip arrays 30 of the application Beyond edge, when tinsel welds with cell piece 31, each of upper and lower surface is each can push down full wafer cell piece with a block pressur plate 31 and the tinsel of correspondence.

If bending part wiry is within the edge of cell piece 31, for ensureing running, each face is both needed to 2 block pressur plates and presses Live completed cell sheet 31 and the tinsel of correspondence thereof, and two pieces of briquettings need to push down cell piece 31 respectively before and after running, There are 2 actions, operate relative complex, inefficient.

And in this application, by tinsel is disconnected at the place of turning back, it is possible to reduce tinsel is at the stress of bending part, it is ensured that Welding effect.

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

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

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

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

When cell piece 31 is one another in series by tinsel S, in adjacent cell sheet 31 one of tinsel S reciprocation extension Between front and the back side of another cell piece 31 of cell piece 31, in the case, tinsel S is at a cell piece 31 Front on extend part constitute front side conductive line 32A, tinsel S extend on the back side of another cell piece 31 adjacent Part constitute back side conductor wire 32B.In this application, unless expressly stated otherwise, conductor wire 32 can be understood as front Conductor wire 32A, back side conductor wire 32B, or front side conductive line 32A and back side conductor wire 32B.

Here, term " reciprocation extension " can be understood as tinsel S and extends " one is reciprocal " two conductor wires 32 of formation, Article two, conductor wire 32 is formed by an one metal wire S coiling, and such as, adjacent two conductor wires form U-shaped structure or V Shape structure, but the application is not limited to this.

Cell piece array 30 according to the embodiment of the present application, multiple conductor wires 32 being positioned on cell piece are by the metal of reciprocation extension Silk S is constituted, and is connected by conductor wire 32 between adjacent cell sheet 31, and therefore, cell piece surface is without printing price Expensive silver main grid, and manufacturing process is simple, it is not necessary to use welding to connect the secondary grid line of cell piece, tinsel S and cell piece Easy to connect with back electrode, the cost of cell piece is substantially reduced.

Additionally, due to conductor wire 32 is made up of the tinsel S of reciprocation extension, (i.e. tinsel is at electricity for the width of conductor wire 32 The width of the projection on the sheet of pond) can reduce, reduce the shading-area in front, and, the quantity of conductor wire 32 can be square Just adjusting, compared with the main gate line that silver slurry is formed, the resistance of conductor wire 32 reduces, and improves photoelectric transformation efficiency.Due to Tinsel S reciprocation extension forms conductor wire, when using cell piece array 30 to manufacture solar module 100, and tinsel S is difficult to displacement, i.e. tinsel " drift " is less likely to occur, does not interferes with photoelectric transformation efficiency, further increases photoelectricity and turn Change efficiency.

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

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

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

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

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

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

In an embodiment of the application, the back side of pond sheet matrix 311 is provided with back electrode 314, tinsel and back electrode 314 It is weldingly connected.

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

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

As shown in figure 18, Figure 18 shows the relation between bar number and the photoelectric transformation efficiency of battery component of conductor wire 32, As can be seen, when the bar number of conductor wire 32 is between 20-30 bar, the photoelectric transformation efficiency of battery component is higher.

It is highly preferred that as shown in Figure 4, tinsel S includes tinsel body 321 and the weld layer 322 of outer surface cladding thereof, Tinsel weld, thus with secondary grid line and/or back electrode by the weld layer 322 of cladding, it is simple to tinsel and pair grid line and/ Or the electrical connection of back electrode, it is to avoid in connection procedure, tinsel drifts about and affects photoelectric transformation efficiency.Certainly, tinsel and electricity The electrical connection of pond sheet can be carried out in the lamination process of solar module, it is also possible to carries out before being laminated, it is preferable that It is attached before being laminated.

Wherein it should be noted that in this application, tinsel S refers to that reciprocation extension forms conductor wire 32 on cell piece 31 Tinsel, conductor wire 32 can include tinsel body 321 and the weld layer 322 of tinsel body 321 external sheath, I.e. tinsel S can also be to include tinsel body 321 and be coated on the weld layer 322 of tinsel body 321 outer layer, In embodiments herein, if without specified otherwise, tinsel refers to that reciprocation extension forms conductor wire 32 on cell piece 31 Tinsel S.

In some embodiments it may be preferred that tinsel body 321 is copper wire, certainly, tinsel S can also be copper wire, I.e. tinsel S not clad welded layer 322, but the application is not limited to this, and such as tinsel body 321 can also be aluminium wire. Preferably, tinsel S has circular cross section, and thus, more sunlight can be irradiated on cell piece matrix, enters one Step improves photoelectric transformation efficiency.

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

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

It should be noted that in this application, adjacent conductive line 32 is formed as straightway parallel to each other or end with arc The line segment of section.

It is to say, in this application, when between adjacent cell piece 31, the tinsel of reciprocation extension disconnects at bending part, Can be simply the tinsel of bending part to be disconnected, use the method to cut off the end of the conductor wire 32 that tinsel is constituted Will be with segmental arc；Can also be that the segmental arc of bending part is completely cut through, use the method to cut off what tinsel was constituted The most there is not segmental arc in the end of conductor wire 32, parallel to each other between adjacent conductor wire 32.

Specifically, as shown in Figure 13 and Figure 14, Figure 13 represents that tinsel back and forth prolongs between two adjacent cell pieces 31 Stretch formation to turn back structure, in the middle of this structure, within tinsel is entirely located in the edge extent of cell piece 31, to this knot When the place of turning back wiry of structure cuts off, cut off position 323 and be positioned at the end at place of turning back wiry.Wiry turn back Place be disconnected after structure as shown in figure 14, the end of conductor wire 32 that tinsel constituted will carry to use the method to cut off There is segmental arc.

In another embodiment of the application, as shown in Figure 15 and Figure 16, Figure 15 represents that tinsel is at two adjacent electricity Between pond sheet 31, reciprocation extension forms structure of turning back, and in the middle of this structure, part of turning back wiry is in cell piece 31 Edge outside, when the place of turning back wiry of this structure is cut off, cut off position 323 and be positioned at cell piece 31, When tinsel is carried out cut-out process, all dogleg section wiry are cut away completely, use the method to cut off tinsel institute The most there is not segmental arc in the end of the conductor wire 32 constituted, (as shown in figure 16) parallel to each other between adjacent conductor wire 32.

It addition, conductor wire 32 is welded by weld layer with the secondary grid line 312 on the front of cell piece 31, weld layer is coated on On tinsel or be located on secondary grid line 312.

It is to say, secondary grid line 312 and conductor wire 32 are by being located on secondary grid line 312 or cladding weld layer on the metal filament Welding.Alternatively, the position contacted with secondary grid line 312 and/or the back electrode 314 of cell piece 31 at conductor wire 32 is provided with Weld layer, it is highly preferred that be all provided with at the position that conductor wire 32 contacts with secondary grid line 312 and the back electrode 314 of cell piece 31 It is equipped with weld layer.Weld layer can only be executed and be overlying on secondary grid line 312 and back electrode 314, it is also possible to executes and is overlying on conductor wire 32. Weld layer can be low-melting-point metal or alloy.Ashbury metal can be conventional ashbury metal, can be such as stannum and selected from Bi, The alloy of at least one metal in Pb, Ag and Cu, specifically, such as SnBi, SnPb, SnBiCu, SnPbAg etc.. So can avoid, between conductor wire 32 and the secondary grid line 312 of cell piece and/or back electrode 314, rosin joint occurs so that final The solar module of preparation has of a relatively high electricity conversion.

In cell piece array 30, the thickness of weld layer and conductor wire 32 (include front side conductive line 32A and back side conductor wire Diameter ratio 32B) can be 0.02-0.5:1.

In this application, when at conductor wire 32 (including front side conductive line 32A and back side conductor wire 32B) and cell piece 31 When the position of secondary grid line 312 and/or back electrode 314 contact is provided with weld layer, conductor wire 32 can be that this area is conventional The tinsel of uncoated weld layer, such as copper wire.

In one embodiment, conductor wire 32 (including front side conductive line 32A and back side conductor wire 32B) is Surface coating There is the tinsel of low-melting alloy layer.Low-melting alloy layer can be that surface is coated with completely, it is also possible to surface portion is coated with. When low-melting alloy layer surface portion is coated with, low-melting alloy layer be preferably formed in the secondary grid line 312 with cell piece 31 and/ Or the position of back electrode 314 welding.When low-melting alloy layer surface is coated with completely, low-melting alloy layer can be with ring-type Form be coated on the periphery of tinsel body.The thickness of low-melting alloy layer can select in the larger context.Preferably feelings Under condition, the thickness of low-melting alloy layer is 1-100 micron, more preferably 1-30 micron.Form the eutectic of low-melting alloy layer Point alloy can be the low-melting alloy that this area is conventional, and its fusing point can be 100-220 DEG C.Under preferable case, low melting point Alloy contains Sn and at least one in Bi, In, Ag, Sb, Pb and Zn, more preferably contain Sn, Bi and At least one in In, Ag, Sb, Pb and Zn.Specifically, low-melting alloy can be Sn-Bi alloy, In-Sn Alloy, Sn-Pb alloy, Sn-Bi-Pb alloy, Sn-Bi-Ag alloy, In-Sn-Cu alloy, Sn-Bi-Cu alloy and Sn-Bi-Zn At least one in alloy.Most preferably, low-melting alloy is Bi-Sn-Pb alloy, such as Sn content be 40 weight %, Bi content is 55 weight % and alloy (namely Sn40%-Bi55%-Pb5%) that Pb content is 5 weight %.Low-melting alloy layer Thickness can be 0.001-0.06mm.The cross-sectional area of conductor wire 32 can be 0.01-0.5mm².Tinsel can be this The tinsel body that field is conventional, such as copper wire.

In cell piece array 30, cell piece 31 can use the cell piece 31 that this area is conventional, such as, can be polysilicon Cell piece 31.Secondary grid line 312 on the sensitive surface of cell piece 31 can be silver, copper, stannum, ashbury metal etc..Secondary grid line 312 Width can be 40-80 micron, thickness can be 5-20 micron, and secondary grid line 312 can be 50-120 bar, and adjacent Article two, the spacing of secondary grid line 312 can be 0.5-3mm.The material of the back electrode 314 on the back side of cell piece 31 can be silver, Copper, stannum, ashbury metal etc., back electrode 314 usually banding, its width can be 1-4mm, and thickness can be 5-20 micron.

Face describes the solaode chip arrays 30 according to another embodiment of the application with reference to Fig. 6.

Solaode chip arrays 30 according to the embodiment of the present application includes n × m cell piece 31, in other words, multiple batteries Sheet 31 is arranged into the matrix form of n × m, and wherein n is columns, and m is row.More specifically, in this embodiment, 36 Individual cell piece 31 is arranged in 6 row and 6 rows, i.e. n=m=6.It is understood that the application is not limited to this, such as, row Number and columns can be unequal.For convenience, in figure 6, along direction from left to right, in same row's cell piece 31 Cell piece 31 be referred to as the first, second, third, fourth, the 5th and the 6th cell piece 31 successively, along side from the top down To, the row of cell piece 31 is referred to as the first, second, third, fourth, the 5th and the 6th row's cell piece 31 successively.

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

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

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

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

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

As shown in the figure and above-mentioned, between the cell piece of the embodiment of the present application, it is connected by conductor wire series connection, first row, second Row, the 3rd row, the 4th row, all use between the 5th row and the 6th row conductor wire realize series connection, as it can be seen, tinsel can Outer for connecting other loads to extend cell piece, such as, it is alternatively possible between second row and the 3rd row, the 4th The diode being used for preventing spottiness in parallel between row and the 5th row, the connection of diode can use those skilled in the art Known technology, such as busbar.

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

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

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

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

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

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

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

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

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

Concrete, solar module 100 includes upper cover plate 10, front adhesive film 20, cell piece array 30, back side glue Film layer 40 and backboard 50.Cell piece array 30 includes multiple cell piece 31, by a plurality of conduction between adjacent cell sheet 31 Line 32 is connected, and front adhesive film 20 directly contacts with conductor wire 32 and is filled between adjacent conductor wire 32.

In other words, according to the solar module 100 of the embodiment of the present application include being sequentially stacked along the vertical direction upper cover plate 10, Front adhesive film 20, cell piece array 30, back side adhesive film 40 and backboard 50, cell piece array 30 includes multiple battery Sheet 31 and a plurality of conductor wire 32 of the multiple cell pieces 31 of connection, conductor wire 32 is made up of tinsel S.

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

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

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

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

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

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

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

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

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

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

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

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

Table by the surface of a tinsel reciprocation extension cell piece 31 in adjacent cell sheet 31 Yu another cell piece 31 Form at least two conductor wires between face, tinsel is welded with the secondary grid line on the front of cell piece, the most adjacent electricity Pond sheet 31 is connected by a plurality of conductor wire 32.

Tinsel is disconnected to obtain cell piece array 30 at the place of turning back wiry.

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

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

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

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

In the embodiment shown in fig. 9, adjacent cell sheet is one another in series, as it has been described above, as required, adjacent cell sheet can To be connected in parallel to each other by tinsel.

Tinsel and cell piece 31 in a tensioned state with welding of battery film, after welding, tinsel is cut off at bending part, passes through As upper type realizes the connection of adjacent cell sheet, thus multiple cell pieces are connected into cell piece array 30.

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

Front adhesive film 20 directly contacts placement with conductor wire 32, and when lamination, front adhesive film 20 is melted fills conductor wire 32 Between gap.Back side adhesive film 40 directly contacts placement with conductor wire 32, and when lamination, back side adhesive film 40 is melted fills Gap between conductor wire 32.

Example 1

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

(1) tinsel S is prepared

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

(2) solar module 100 is prepared

The POE adhesive film (melt temperature is 65 DEG C) of a size of 1630 × 980 × 0.5mm is provided, and size is correspondingly provided It is the glass plate of 1633 × 985 × 3mm and polycrystalline silicon battery plate 31 that 60 chip sizes are 156 × 156 × 0.21mm.Battery Sheet 31 has 91 secondary grid lines (material is silver, and width is 60 microns, and thickness is 9 microns), and every secondary grid line is substantially Running through the distance between cell piece 31, and adjacent pair grid line in the vertical is 1.7mm, and the back side of cell piece 31 has 5 back ofs the body Electrode (material is stannum, and width is 1.5 millimeters, and thickness is 10 microns), every back electrode runs through electricity the most in the vertical Distance between pond sheet 31, and adjacent two back electrodes is 31mm.

60 cell pieces 31 are arranged with a matrix type (6 rows 10 arrange), two cell pieces 31 adjacent in same row Between, make an one metal wire reciprocal in the state of tension between the front and the back side of another cell piece of a cell piece 31 Extending, tinsel is by laying respectively at reciprocation extension under two clip tensionings of these two ends of root silk, thus forms 15 and put down The conductor wire of row, and welds the secondary grid line of a cell piece 31 with conductor wire, by the back electrode of another cell piece 31 and Conductor wire welds, and welding temperature is 160 DEG C, and the distance between the adjacent conductive line being parallel to each other is 9.9mm, thus will 10 cell piece series connection are in a row, and by busbar, this 6 row battery strings is connected into array.At place of turning back wiry Disconnect tinsel.Then, by upper glass plates, upper POE adhesive film, in the matrix form arrangement and multiple with welded wire Cell piece, lower POE adhesive film and lower glass plate stack the most successively, wherein, make the sensitive surface of cell piece 31 in the face of just Face adhesive film 20, makes the back side of cell piece 31 in the face of back side adhesive film 40, is subsequently placed in laminating machine and is laminated, thus Prepare solar module A1.

Comparative examples 1

Comparative examples 1 is with the difference of example 1:

Cell piece 31 is arranged with a matrix type, and between two adjacent cell pieces 31, uses as shown in figure 17 Wire drawing mode, by clip 34 tensioning by every one metal wire end of 15 tinsels parallel to each other, flattens cell piece, The tension force of clip is 2N, by the secondary grid in independent for these each of the 15 tinsels parallel to each other front with a cell piece 31 Wire bonding, and welding with the back electrode at the back side of another cell piece, and between the adjacent conductive line 32C being parallel to each other away from From for 9.9mm.Thus prepare solar module D1.

Comparative examples 2

Comparative examples 2 is with the difference of example 1: arranged with a matrix type by cell piece, is cascaded 15 Tinsel is pasted at transparent adhesive film layer, is pasted by tinsel on solar battery sheet, between two adjacent cell pieces, Then tinsel connects the back side of the front of a cell piece and another cell piece, by upper glass plates, upper POE adhesive film, Transparent adhesive film layer, in the matrix form arrangement and the multiple cell pieces being connected with tinsel, transparent adhesive film layer, lower POE adhesive film Stack the most successively with lower glass plate, thus prepare solar module D2.

Example 2

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

(1) conductor wire is prepared

The surface of copper wire is adhered to one layer of Sn40%-Bi55%-Pb5% alloy-layer (fusing point is about 125 DEG C), wherein, copper wire Cross-sectional area is 0.03mm², the thickness of alloy-layer is 10 microns, thus prepares conductor wire.

(2) solar module is prepared

There is provided the EVA adhesive film layer (melt temperature is 60 DEG C) of a size of 1630 × 980 × 0.5mm, it is provided that a size of The glass plate of 1633 × 985 × 3mm and the polycrystalline silicon battery plate 31 that 60 chip sizes are 156 × 156 × 0.21mm.Cell piece The sensitive surface of 31 is provided with 91 secondary grid lines (material is silver, and width is 60 microns, and thickness is 9 microns), every secondary grid The distance that line runs through between cell piece 31, and adjacent two secondary grid lines the most in the vertical is 1.7mm, the back of the body of cell piece 31 Face is provided with 5 back electrodes (material is stannum, and width is 1.5 millimeters, and thickness is 10 microns), and every back electrode base The distance run through in the vertical in basis between cell piece 31, and adjacent two back electrodes is 31mm.

60 cell pieces 31 are arranged with a matrix type (6 rows 10 arrange), two cell pieces 31 adjacent in same row Between, make tinsel back and forth prolong in the state of tension between the front and the back side of another cell piece of a cell piece 31 Stretch, thus form 20 parallel conductor wires, and the secondary grid line of a cell piece 31 is welded with conductor wire, by another The back electrode of cell piece 31 welds with conductor wire, and welding temperature is 160 DEG C, and between the adjacent conductive line being parallel to each other away from From for 7mm, thus by a row for 10 cell pieces series connection, 6 row's battery strings are connected into array by busbar.? The place of turning back wiry disconnects tinsel.Then, by upper glass plates, upper POE adhesive film, in the matrix form arrangement and with gold Multiple cell pieces, lower POE adhesive film and lower glass plate that genus wire bond connects stack the most successively, wherein, make cell piece 31 Sensitive surface in the face of front adhesive film 20, front adhesive film 20 directly contacts with conductor wire 32, makes the back side of cell piece 31 In the face of back side adhesive film 40, being subsequently placed in laminating machine and be laminated, front adhesive film 20 is filled in adjacent conductor wire 32 Between, thus prepare solar module A2.

Example 3

Method according to example 2 prepares solar module, and the difference with example 2 is: at the sensitive surface of cell piece 31 Secondary grid line on short grid line 33 (material is silver, and width is 0.1mm) is set, this short grid line 33 is vertical with pair grid line, is used for Connect secondary grid line and the conductor wire of the edge portions of the sensitive surface of cell piece, as shown in figure 12, thus prepare solar battery group Part A3.

Example 4

Method according to example 3 prepares solar module, and the difference with example 3 is: the connected mode of array For: between two adjacent row's cell pieces, the sensitive surface of the cell piece of a conductor wire end from a (a >=1) arranges In extending and arranging with a+1, the back side of the cell piece 31 of adjacent end portion is formed and electrically connects, and is used for realizing adjacent two row's cell pieces Between connection, and for connect the conductor wire of adjacent two row's cell pieces 31 with for being connected adjacent cell sheet 31 in this two row Conductor wire be mutually perpendicular to arrange.So prepare solar module A4.

Test case 1

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

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

Result is as shown in table 1 below.

Table 1

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

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

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

Test case 2

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

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

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

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

Result is as shown in table 2 below.

Table 2

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

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

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

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

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

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

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

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

Claims (42)

1. a solaode chip arrays, it is characterised in that include multiple cell piece, by multiple between adjacent cell sheet Conductor wire is connected, and the plurality of conductor wire is made up of tinsel, at least one one metal wire battery in adjacent cell sheet Between the surface of sheet and the surface of another cell piece reciprocation extension and after described tinsel with described welding of battery film described The place of turning back wiry disconnects described tinsel.

Solaode chip arrays the most according to claim 1, it is characterised in that described tinsel is at one electricity Reciprocation extension between front and the back side of another cell piece described of pond sheet.

Solaode chip arrays the most according to claim 2, it is characterised in that the back side of described cell piece is provided with Back electrode with described welded wire.

4. according to the solaode chip arrays according to any one of claim 1-3, it is characterised in that described tinsel exists Reciprocation extension 10-60 time between front and the back side of another cell piece described of one cell piece.

5. according to the solaode chip arrays according to any one of claim 1-4, it is characterised in that adjacent two conductions Spacing between line is 2.5-15mm.

6. according to the solaode chip arrays according to any one of claim 1-5, it is characterised in that adjacent two conductions Linear become straightway parallel to each other or the end line segment with segmental arc.

7. according to the solaode chip arrays according to any one of claim 1-6, it is characterised in that described tinsel is One.

8. according to the solaode chip arrays according to any one of claim 1-6, it is characterised in that described cell piece is arranged Cloth becomes the matrix form of n × m, and wherein n is columns, and m is row,

In same row's cell piece, described tinsel extends in the surface of a cell piece and the surface of another adjacent cell piece Between, in two adjacent row's cell pieces, described tinsel extends in surface and the a+1 of a cell piece in a row Between the surface of a cell piece in row, and m-1 >=a >=1.

Solaode chip arrays the most according to claim 8, it is characterised in that in adjacent two row's cell pieces, institute State tinsel extend in the surface of the cell piece being positioned at the end that a arranges and be positioned at the battery of the end that a+1 arranges Between the surface of sheet, the end that an end of described a row and described a+1 arrange is positioned at the same side of described matrix.

Solaode chip arrays the most according to claim 9, it is characterised in that in same row's cell piece, institute State tinsel and extend between the front of a cell piece and the back side of another adjacent cell piece,

In two adjacent row's cell pieces, described tinsel extend in be positioned at a row an end cell piece front with Between the back side of a cell piece of the end of a+1 row, to realize being connected in series between adjacent two row's cell pieces.

11. solaode chip arrays according to any one of-10 according to Claim 8, it is characterised in that extend in same Tinsel between the adjacent cell sheet of row is one, and to extend in the tinsel between the cell piece of adjacent row be one.

12. according to the solaode chip arrays according to any one of claim 1-11, it is characterised in that described tinsel For copper wire.

13. according to the solaode chip arrays according to any one of claim 1-12, it is characterised in that described tinsel There is circular cross section.

14. according to the solaode chip arrays according to any one of claim 1-13, it is characterised in that described tinsel Reciprocation extension in a tensioned state before being connected with described cell piece.

15. according to the solaode chip arrays according to any one of claim 1-14, it is characterised in that described conductor wire Being welded by weld layer with the secondary grid line on the front of described cell piece, described weld layer is coated on described tinsel or is located at On described secondary grid line.

16. solaode chip arrays according to claim 15, it is characterised in that the thickness of described weld layer and institute Stating diameter ratio wiry is 0.02-0.5:1.

17. solaode chip arrays according to claim 15, it is characterised in that described weld layer contain Sn with And at least one in Bi, In, Ag, Sb, Pb and Zn.

18. solaode chip arrays according to claim 15, it is characterised in that described weld layer contains Sn, Bi And at least one in In, Ag, Sb, Pb and Zn.

19. solaode chip arrays according to claim 15, it is characterised in that the thickness of described weld layer is 1-100 micron.

20. solaode chip arrays according to claim 15, it is characterised in that described weld layer is coated on described On tinsel or be located on described secondary grid line.

21. according to the solaode chip arrays according to any one of claim 1-20, it is characterised in that described secondary grid line Width be 40-80 micron, thickness is 5-20 micron, described secondary grid line is 50-120 bar, and adjacent two secondary grid lines Spacing is 0.5-3mm.

22. according to the solaode chip arrays according to any one of claim 1-21, it is characterised in that described tinsel And the adhesion between described cell piece is in the range of 0.1-0.8 newton.

23. solaode chip arrays according to claim 22, it is characterised in that described tinsel and described battery Adhesion between sheet is in the range of 0.2-0.6 newton.

24. 1 kinds of solar modules, it is characterised in that the upper cover plate that includes being sequentially stacked, front adhesive film, battery Chip arrays, back side adhesive film and backboard, described cell piece array is the solaode according to any one of claim 1-23 Chip arrays.

25. solar modules according to claim 24, it is characterised in that described front adhesive film is led with described Electric wire directly contacts and is filled between adjacent conductor wire.

26. solar modules according to claim 24, it is characterised in that described tinsel is at adjacent cell sheet In a cell piece front and the back side of another cell piece between reciprocation extension, described front adhesive film and one Conductor wire on the front of cell piece directly contacts 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 described and is filled in another cell piece described The back side adjacent conductive line between.

27. according to the solar module according to any one of claim 24-26, it is characterised in that described cell piece Size be 156mm × 156mm；The series resistance of described solar module is 380-440 milliohm/60 slice.

28. according to the solar module according to any one of claim 24-26, it is characterised in that described cell piece Size be 156mm × 156mm；The open-circuit voltage of described solar module is 37.5-38.5V/60 sheet；Short circuit current For 8.9-9.4A.

29. according to the solar module according to any one of claim 24-26, it is characterised in that described solar energy The fill factor, curve factor of battery component is 0.79-0.82.

30. according to the solar module according to any one of claim 24-26, it is characterised in that described cell piece Size be 156mm × 156mm；The running voltage of described solar module is 31.5-32V/60 sheet；Operating current is 8.4-8.6A。

31. according to the solar module according to any one of claim 24-26, it is characterised in that described cell piece Size be 156mm × 156mm；The conversion efficiency of described solar module is 16.5-17.4%；Power is 265-280W / 60.

The preparation method of 32. 1 kinds of solar modules, it is characterised in that including:

By between surface and the surface of another cell piece of a tinsel reciprocation extension cell piece in adjacent cell sheet Form at least two conductor wires, tinsel is welded with the secondary grid line on the front of described cell piece, the most adjacent cell piece Connected by a plurality of conductor wire；

Described tinsel is disconnected to obtain cell piece array at the described place of turning back wiry；

Upper cover plate, front adhesive film, described cell piece array, back side adhesive film and backboard are stacked successively, and makes described electricity Back side adhesive film faced by the back side of described front adhesive film, described cell piece faced by the front of pond sheet, then carries out lamination and obtains Solar module.

The preparation method of 33. solar modules according to claim 32, it is characterised in that described tinsel exists Reciprocation extension under tensioning state.

34. according to the preparation method of the solar module according to any one of claim 32-33, it is characterised in that Described tinsel is reciprocation extension 10-60 time between the back side of the front of one cell piece and another cell piece described.

35. according to the preparation method of the solar module according to any one of claim 32-34, it is characterised in that Spacing between adjacent two conductor wires is 2.5-15mm.

36. according to the preparation method of the solar module according to any one of claim 32-35, it is characterised in that Described tinsel is one.

37. according to the preparation method of the solar module according to any one of claim 32-35, it is characterised in that Described cell piece is arranged into the matrix form of n × m, and wherein n is columns, and m is row,

In same row's cell piece, described tinsel extends in the surface of a cell piece and the surface of another adjacent cell piece Between, in two adjacent row's cell pieces, described tinsel extends in surface and the a+1 of a cell piece in a row Between the surface of a cell piece in row, and m-1 >=a >=1；In adjacent two row's cell pieces, described tinsel extends in A row an end cell piece surface and a+1 row an end cell piece surface between, The end that one end of described a row and described a+1 arrange is positioned at the same side of described matrix.

38. according to the preparation method of the solar module described in claim 37, it is characterised in that at same row's battery In sheet, described tinsel extends between the front of a cell piece and the back side of another adjacent cell piece,

In two adjacent row's cell pieces, described tinsel extend in be positioned at a row an end cell piece front with Between the back side of a cell piece of the end of a+1 row, to realize being connected in series between adjacent two row's cell pieces.

39. according to the preparation method of the solar module according to any one of claim 37, it is characterised in that extend Tinsel between the adjacent cell sheet of same row is one, and to extend in the tinsel between the cell piece of adjacent row be one Root.

40. according to the preparation method of the solar module according to any one of claim 32-39, it is characterised in that Described tinsel is copper wire.

41. according to the preparation method of the solar module according to any one of claim 32-40, it is characterised in that The front of described cell piece is provided with secondary grid line, makes a described tinsel reciprocation extension electricity in two adjacent cell pieces Between front and the back side of another cell piece of pond sheet, by described tinsel by being coated on outside described tinsel or being located at Weld layer on described secondary grid line welds with described secondary grid line and by the back side electricity on the described tinsel back side with described cell piece Pole is welded.

42. according to the preparation method of the solar module according to any one of claim 32-41, it is characterised in that The width of described secondary grid line is 40-80 micron, and thickness is 5-20 micron, and described secondary grid line is 50-120 bar, and adjacent two The spacing of bar pair grid line is 0.5-3mm.