CN106206811B

CN106206811B - Solar cell module and preparation method thereof

Info

Publication number: CN106206811B
Application number: CN201510217625.8A
Authority: CN
Inventors: 赵志强; 田野; 彭汉东; 康淑萍; 姜占锋; 何龙
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2014-10-31
Filing date: 2015-04-30
Publication date: 2018-11-09
Anticipated expiration: 2035-04-30
Also published as: CN106206768A; CN106206812B; CN106206818A; CN106206763A; CN106206818B; CN106206767B; CN106206767A; CN106206761B; CN106206813A; CN106206811A; CN106206766A; CN106206809A; CN106206814A; CN106206762B; CN106206816A; CN106206815A; CN106206819A; CN106206816B; CN106206815B; CN106206810B

Abstract

The invention 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, battery chip arrays, back side adhesive film and backboard, the battery chip arrays include multiple cell pieces, it is connected by a plurality of conductor wire between adjacent cell piece, at least two conductor wires are formed by wire of the reciprocation extension between the surface of adjacent cell piece, the conductor wire is contacted with the cell piece, and the front adhesive film and the conductor wire are in direct contact and are filled between adjacent conductor wire.According to the solar cell module of the application, the main gate line and welding of conventional batteries piece are replaced by the conductor wire being made of the wire of reciprocation extension, reduces cost；The wire of reciprocation extension reduces the number of the free end of wire, and required space is small when wire is arranged, and is not limited by a space, and the radical for the conductor wire being made of wire reciprocation extension can greatly improve, and prepares simply, can produce in batches.

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 technology

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 on by covering in main gate line Extracted current, welding, main gate line and secondary grid line cover a positive part for 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.

Invention content

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

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 silver causes the preparation of main gate line and secondary grid line complicated and of high cost, and when cell piece is connected as component needs one A positive main gate line of cell piece is welded by the backplate of welding and adjacent cell piece, therefore the welding of main gate line is complicated, The production cost of cell piece is high.

In 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 Production cost is high.

In the related technology, it is proposed that the solar battery sheet with 3 main gate lines, 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 with secondary grid line welding 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, first more parallel wires are fixed on by cohesive mode on transparent film layer, then will It is fitted on cell piece, so that wire is contacted with the secondary grid line on cell piece finally by laminating technology, is to pass through lamination Technique makes wire be in contact with secondary grid line, to derived current.Not only hyaline membrane affects the absorptivity of light to this technical solution, And a large amount of parallel wires connect the case where there is also poor contacts with cell piece, seriously affect its electrical property, therefore need The radical of wire is increased, but the radical of wire increases, and the absorptivity of positive light can be influenced, affects the property of product Can, therefore, does not promote and be commercialized using the product of this scheme.In addition, as described above, the radical of a large amount of parallel wires Nevertheless suffer from the limitation of the spacing between adjacent wire.

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

Therefore, in area of solar cell, the structure of solar cell is simultaneously uncomplicated, but each structure is more crucial, The preparation of main grid is since the factor of various aspects considers, such as shading surface, conductivity, equipment, technique, cost etc., causes it for too Difficult point in positive energy battery technology and hot spot.Those skilled in the art just make on the market too by the effort of several generations many times Positive energy cell piece became three main grid solar cells at 2007 or so by two main grid solar cells, and a small amount of producer was in 2014 Left and right proposes the solar cell of four main grids, and the technology of no main grid is also the concept just proposed in recent years, but realizes more tired Difficulty does not have more ripe 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 print on cell piece expensive Silver-colored main gate line reduce cost, and can be commercialized without welding, prepare it is simple easily realize, it is especially at low cost, Equipment is simple, can produce in batches, and electricity conversion is high.

According to the solar cell module of the application first aspect embodiment, including the upper cover plate, the front glue that are sequentially stacked Film layer, battery chip arrays, back side adhesive film and backboard, the battery chip arrays include multiple cell pieces, between adjacent cell piece It is connected by a plurality of conductor wire, wire of at least two conductor wires by reciprocation extension between the surface of adjacent cell piece It is formed, the conductor wire is contacted with the cell piece, and the front adhesive film is in direct contact with the conductor wire and is filled in phase Between adjacent conductor wire.

According to the solar cell module of the embodiment of the present application, taken by the conductor wire being made of the wire of reciprocation extension For the main gate line and welding of conventional batteries piece, cost is reduced；The wire of reciprocation extension reduces the free end of wire Number, required space is small when wire is arranged, and is not limited by a space, the item number for the conductor wire being made of wire reciprocation extension can To greatly improve, prepares simply, can produce in batches；Front adhesive film is in direct contact with conductor wire and is filled in adjacent lead Between electric wire, it can avoid the oxidation of conductor wire effectively by the isolations such as conductor wire and outside air, steam, can be effectively ensured Electricity conversion.

According to the preparation method of the solar cell module of the application second aspect embodiment, including：Wire is reciprocal It extends between the surface of cell piece and is contacted with the surface of the cell piece and form at least two conductor wires, adjacent battery Piece forms battery chip arrays by a plurality of conductor wire connects；By upper cover plate, front adhesive film, the battery chip arrays, the back side Adhesive film and backboard are sequentially stacked, and so that the front of the cell piece is faced the front adhesive film, front adhesive film is led with described Electric wire is in direct contact, and so that the back side of the cell piece is faced back side adhesive film, is then laminated, front adhesive film is filled in phase Between adjacent conductor wire, solar cell module is obtained.

Description of the drawings

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

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

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

Fig. 4 is the schematic diagram 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 cell chip arrays of another embodiment of the application.

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

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

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

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

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

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

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

Figure 13 is the wire in tension schematic diagram of comparative example 1.

Figure 14 is the item number and photoelectric conversion efficiency of conductor wire in the solar cell chip arrays according to the embodiment of the present application Graph of relation.

Reference numeral：

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；Carry on the back electric field 313；Back electrode 314；

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

Back side adhesive film 40；

Lower cover 50.

Specific implementation mode

Embodiments herein 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 for explaining the application, and should not be understood as the limitation to the application.

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, is located on 311 front of battery sheet matrix secondary grid line 312 is set Back of the body electric field 313 at the back side of battery sheet matrix 311 and the back electrode 314 that is located on back of the body 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 of the body electric field 313 is referred to as the back of the body electric field 313 of cell piece 31, back electrode 314 It is referred to as the back electrode 314 of cell piece 31.

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

In other words, cell piece 31 includes silicon chip, to some process layers of silicon chip surface, the secondary grid line of light-receiving surface and shady face Back of the body electric field 313 and back electrode 314 or equivalent not front electrode other class solar cells.

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

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

In solar cell 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, also may be used To extend between the front and the back side of another cell piece 31 of a cell piece 31 in adjacent cell piece 31.In wire When S is extended between the front and the back side of another cell piece 31 of in adjacent cell piece 31 cell piece 31, conductor wire 32 may include the front side conductive line 32A being electrically connected on the front for extend in cell piece 31 and with the secondary grid line 312 of cell piece 31, And extend in the back side conductor wire 32B being electrically connected on the back side of cell piece 31 and with the back electrode of cell piece 31 314, wire Parts of the S between adjacent cell piece 31 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 below in conjunction with the accompanying drawings.

As shown in Figure 1 to 11, include upper cover plate 10, front according to the solar cell module of the embodiment of the present application 100 Adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50.Battery chip arrays 30 include multiple cell pieces 31, adjacent It is connected by a plurality of conductor wire 32 between cell piece 31, at least two conductor wires 32 are by reciprocation extension on the surface of adjacent cell piece Between wire S formed, conductor wire 32 is contacted with cell piece 31, and front adhesive film 20 is in direct contact and fills with conductor wire 32 Between adjacent conductor wire 32.

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, battery chip arrays 30, back side adhesive film 40 and backboard 50, battery chip arrays 30 include multiple batteries Piece 31 and a plurality of conductor wire 32 for connecting multiple cell pieces 31, at least two conductor wires 32 are made of wire S, and wire S is past It extends in again on the surface of two adjacent cell pieces 31, the present invention does not limit to all conductor wires by wire coiling shape At, it can partly be formed by wire coiling, can also be whole, reciprocation extension can be back and forth primary, the termination of reciprocation extension Point also there is no limit, starting point and ending point can be on same cell piece, can also be on different cell pieces, as long as Containing around.

Conductor wire 32 is electrically connected with cell piece 31, wherein the front adhesive film 20 and conductor wire 32 being located on cell piece 31 It is in direct contact and is filled between adjacent conductor wire 32, front adhesive film 20 can both play the work of fixed conductor wire 32 With, and conductor wire 32 and outside air and steam can be completely cut off, to avoid conductor wire 32 from being aoxidized, it ensure that opto-electronic conversion Efficiency.

As a result, according to the solar cell module of the embodiment of the present application 100, by being made of the wire S of reciprocation extension Conductor wire 32 replace conventional batteries piece main gate line and welding, reduce cost；The wire S of reciprocation extension reduces metal The number of the free end of silk S, required space is small when wire S is arranged, and is not limited by a space, is made of wire S reciprocation extensions The item number of conductor wire 32 can greatly improve, prepare simple, can produce in batches；Front adhesive film 20 is direct with conductor wire 32 It contacts and is filled between adjacent conductor wire 32, can be avoided effectively by the isolations such as conductor wire 32 and outside air, steam Electricity conversion can be effectively ensured in the oxidation of conductor wire 32.

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, it is normal that this field may be used in polyethylene octene elastomer (POE) and ethylene-vinyl acetate copolymer (EVA) 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 can be respectively transparent plank, such as glass plate.

It, can be first by the secondary grid line and the back of the body of conductor wire and cell piece 31 in the preparation process of solar cell module 100 Then each layer is laid out and is laminated by electrodes conduct gluing knot or welding.

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.

The battery chip arrays 30 according to the application are specifically described below in conjunction with the accompanying drawings.

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

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

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

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

In addition, when cell piece 31 is by wire S parallel connections, wire S can be with reciprocation extension in the front of cell piece 31 On, in the case, wire S constitutes the front side conductive line 32A of cell piece, and optionally, wire S reciprocation extensions are in cell piece On 31 front and different wire S reciprocation extensions are on the back side of cell piece 31, in the case, extend in cell piece 31 Wire S on front 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 extensions 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 the part that front side conductive line 32A, wire S extend 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 is reciprocal " forming two conductor wires 32, and two Conductor wire 32 is formed by an one metal wire S coilings, for example, adjacent two conductor wires form U-shaped structure or V-arrangement knot Structure, but the application is not limited to this.

According to the battery chip arrays 30 of the embodiment of the present application, the conductor wires 32 of multiple cell pieces 31 by reciprocation extension metal Silk S is constituted, and is connected by conductor wire 32 between adjacent cell piece 31, and therefore, cell piece surface is expensive without printing Silver-colored main grid, and manufacturing process is simple, and cell piece, the secondary grid line and the back of the body of wire S and cell piece are connected without using welding Electrode it is easy to connect, 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, positive shading-area is reduced, moreover, the quantity of conductor wire 32 can facilitate Ground adjusts, and 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 metal Silk S reciprocation extensions form conductor wire, and when manufacturing solar cell module 100 using battery chip arrays 30, wire S is not easy to move Position, i.e., wire is less likely to occur " to drift about ", does not interfere with photoelectric conversion efficiency, further improves photoelectric conversion efficiency.

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

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

That is, in this application, adjacent two cell pieces 31 are connected by wire S, and adjacent two In a cell piece 31, the front of a cell piece 31 is connected with wire S, the back side and the wire S phases of another cell piece 31 Even.

Wherein, the front adhesive film 20 and the 31 positive gold of cell piece on cell piece 31 that front is connected with wire S Belong to silk S to be in direct contact and be filled between adjacent conductor wire 32, the back side glue for the cell piece 31 that the back side is connected with wire S The wire S at film layer 40 and 31 back side of cell piece is in direct contact and is filled between adjacent conductor wire 32 (such as Fig. 2 institutes Show).

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

Optionally, it is located at the back electrode 314 of the conductor wire 32 and another cell piece 31 at the back side of another cell piece 31 Electrical connection.

That is, the front of a cell pieces 31 of the wire S in adjacent cell piece 31 and another cell piece 31 The back side between reciprocation extension when, wire S forms front side conductive line 32A in the front of cell piece 31, and wire S is another The back side of one cell piece 31 forms back side conductor wire 32B, and positioned at the back side conductor wire 32B at another 31 back side of cell piece It is to be electrically connected with the back electrode 314 at another 31 back side of cell piece.Thus, it is possible to ensure wire S and another battery The connection effect at the back side of piece 31.

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

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

In the embodiment shown in Fig. 1-3, two cell pieces 31 of solar cell chip arrays 30 are shown, in other words, Show two cell pieces 31 being connected with each other by the conductor wire 32 being made 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 of the body 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, can also be the back side similar to the secondary grid line 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 Figs. 1-3, in this embodiment, solar cell chip arrays include two cell pieces (for convenience, Referred to herein as the first cell piece 31A, the second cell piece 31B), wire S reciprocation extensions the first cell piece 31A front (by Smooth surface, the upper surface in Fig. 2) between the back side of the second cell piece 31B, wire S constitutes the first cell piece 31A as a result, Front side conductive line and the second cell piece 31B back side conductor wire, wire S and the secondary grid line of the first cell piece 31A are electrically connected (such as welding or with conduction gluing knot) is met and to be electrically connected with the back electrode of the second cell piece 31B.

In some embodiments, wire reciprocation extension 10-60 between the first cell piece 31A and the second cell piece 31B It is secondary to form 20-120 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 be it is single, in other words, 24 conductor wires of formation of single metal wire reciprocation extension 12 times, between adjacent conductive line Spacing can be 2.5 millimeters -15 millimeters.Certainly, wire of the present invention is not limited to single, can be more, can also For the independent coiling of more one metal wires.According to this embodiment, compared with the silver-colored main grid of conventional batteries piece, quantity increases, to reduce Distance of the electric current from secondary grid line to conductor wire, reduces resistance, improves electricity conversion.Embodiment shown in Fig. 1 In, 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, phase Adjacent conductor wire can also form v-shaped structure.

As shown in figure 14, Figure 14 shows the pass between the item number of conductor wire 32 and the photoelectric conversion efficiency of battery component System, as can be seen, when the item number of conductor wire 32 is between 20-30 items, the photoelectric conversion efficiency higher of battery component.

It is highly preferred that as shown in figure 4, wire S includes wire ontology 321 and its connecting material layer of outer surface cladding 322, connecting material layer 322 can be conductive adhesive layer or welding layer, the welding layer and secondary grid line and/or the back of the body that wire passes through cladding Electrode welding is convenient for being electrically connected for wire and secondary grid line and/or back electrode, avoids wire drift in connection procedure as a result, And influence photoelectric conversion efficiency.Certainly, wire can be in the lamination of solar cell module with being electrically connected for battery sheet body It carries out, can also carry out before being laminated, it is preferable that be attached before being laminated in journey.

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 may include the connecting material layer of 321 external sheath of wire ontology 321 and wire ontology 322, i.e. wire S can also be including wire ontology 321 and the connecting material layer for being coated on 321 outer layer of wire ontology 322, in embodiments herein, if without specified otherwise, wire refers to that reciprocation extension forms conduction on cell piece 31 The wire S of line 32.

In some embodiments it may be preferred that wire ontology 321 is copper wire, certainly, wire S may be copper wire, i.e., Wire S does not coat connecting material layer 322, but the application is not limited to this, such as wire ontology 321 or aluminium wire. Preferably, wire S has circular cross section, and more sunlights can be irradiated on battery sheet matrix as a result, further be carried High-photoelectric transformation efficiency.

In some embodiments it may be preferred that before wire is contacted with cell piece, wire is reciprocal in a tensioned state Extend, i.e., wire is stretched, 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.

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.

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

Include n × m cell piece 31, in other words, Duo Ge electricity according to the solar cell chip arrays 30 of the embodiment of the present application Pond piece 31 is arranged into 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 row 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 figure 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, wire reciprocation extension is on the surface of a cell piece 31 and another adjacent battery 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 rows Between surface and the surface of a cell piece 31 in a+1 rows, and m-1 >=a >=1.

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

It is highly preferred that in adjacent two rows of cell pieces 31, wire reciprocation extension is in the electricity positioned at the end that a is arranged Between the surface of pond piece 31 and the surface of cell piece 31 positioned at the end of a+1 rows, an end and the a+ of a rows The end of 1 row is located at the same side of matrix, such as in figure 6, is located 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 Between the back side in the front of the 5th cell piece 31 in extension second row and second row between the 4th cell piece 31, until the tenth The back of the body in the front of the second cell piece 31 in one one metal wire reciprocation extension second row and second row between the first cell piece 31 Between face, then, first in the positive row with third of the first cell piece 31 in the 12nd one metal wire reciprocation extension second row Between the back side between cell piece 31, thus second row is one another in series with third row.Then, third row and the 4th row are gone here and there successively Connection, the 4th row connect with the 5th row, and the 5th row connects with the 6th row, thus complete the preparation of battery chip arrays 30, implement herein In example, busbar is set in the left side of the first cell piece 31 of first row and the left side of the first cell piece 31 of the 6th row, one 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, wire can be with Extend for connecting other loads outside cell piece, for example, it is alternatively possible between second row and third row, the 4th row and The diode for preventing spottiness in parallel between 5th row, the connection of diode may be used well known to those skilled in the art Technology, 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, It can be arranged in the left or right side of respective row and busbar is respectively set.

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 that the front reciprocation extension of piece 31 passes through the second to the 6th cell piece 31.

In some specific implementation modes of the application, the binding force between wire and cell piece 31 is in 0.1-0.8 oxen In the range of.That is, the binding force between conductor wire 32 and cell piece 31 is between 0.1-0.8 newton.Preferably, golden Belong to the binding force between silk and cell piece 31 in the range of 0.2-0.6 newton, firm welding between cell piece and wire, battery Piece operate and transfer process in be less prone to desoldering, be less prone to poor contact and caused by performance decline, while cost It is relatively low.

In some specific implementation modes 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 milliohms, the excellent electrical property of battery when for 72.

In some specific implementation modes 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 pieces, same the application is not limited to 60, can be 30, 72 etc..Short circuit current is 8.9-9.4A, and short circuit current is unrelated with the number of cell piece.

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

In some specific implementation modes 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 pieces.

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

Include first by wire reciprocation extension according to the preparation method of the solar cell module 100 of the embodiment of the present application It contacts between the surface of cell piece 31 and with the surface of cell piece 31 and forms at least two conductor wires 32, thus adjacent electricity Pond piece 31 is connected by a plurality of conductor wire 32 by forms battery chip arrays 30.

Upper cover plate 10, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50 are sequentially stacked, made The front of cell piece 31 faces front adhesive film 20, and the front adhesive film 20 is in direct contact with the conductor wire 32, makes battery The back side of piece 31 faces back side adhesive film 40, is then laminated, and front adhesive film 20 is filled between adjacent conductor wire 32, Obtain solar cell module 100.

In other words, in the preparation according to the solar cell module of the application 100, first by wire reciprocation extension in phase It is contacted on the surface of adjacent cell piece 31 and with the surface of cell piece 31 and constitutes multiple conductor wires 32, multiple cell pieces 31 are connected i.e. Constitute battery chip arrays 30.

Then upper cover plate 10, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50 are folded successively Set, front adhesive film 20 made to be in direct contact with conductor wire 32, finally by upper cover plate 10, front adhesive film 20, battery chip arrays 30, Back side adhesive film 40 and backboard 50 are laminated, and front adhesive film 20 is filled between adjacent conductor wire 32, you can obtain this Apply for above-mentioned solar cell module 100.

Specifically, as shown in fig. 7, in a tensioned state, by an one metal wire reciprocation extension 12 times.Then, such as Fig. 8 institutes Show, prepares the first cell piece 31A and the second cell piece 31B.Next, as shown in figure 9, by the first cell piece 31A front with Wire is connected and the back side of the second cell piece 31B is connected with wire, and battery chip arrays 30 are consequently formed, are shown in Fig. 9 Two cell pieces 31, as above, when battery chip arrays 30 have multiple cell pieces 31, using the wire of reciprocation extension by one The front of a cell piece 31 is connected with the back side of another adjacent cell piece 31, i.e., by the secondary grid line of a cell piece 31 and separately The back electrode of one cell piece 31 is connected with wire.Wire is opened by being located at two clips of this two end of root silk Tightly lower reciprocation extension, the wire only need two clips that coiling can be realized, greatly reduce the dosage of clip, save dress With space.

In the embodiment shown in fig. 9, adjacent cell piece is one another in series, and as above, as needed, adjacent cell piece can lead to Wire is crossed to be connected in parallel to each other.

By the battery chip arrays 30 being prepared and upper cover plate 10, front adhesive film 20, back side adhesive film 40 and backboard 50 It is sequentially stacked, and the front of cell piece 31 is made to face front adhesive film 20, front adhesive film 20 is in direct contact with conductor wire 32, electricity The back side of pond piece 31 faces back side adhesive film 40, is then laminated to obtain solar cell module 100, front adhesive film 20 is filled out It fills between adjacent conductor wire 32.It is understood that wire can be bonded or be welded with cell piece 31, wire and electricity The connection of pond piece 31 can carry out in lamination process, it is of course also possible to first connect, it is rear to be laminated.

The solar cell module 100 of the application is described 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

Adhere to one layer of Sn40%-Bi55%-Pb5% alloy-layer on the surface of copper wire (fusing point is 125 DEG C), wherein copper The cross-sectional area of silk is 0.04mm², the thickness of alloy-layer is 16 microns, to which wire S be made.

(2) solar cell module 100 is prepared

The POE adhesive films (melt temperature is 65 DEG C) that size is 1630 × 980 × 0.5mm are provided, and 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 31.Cell piece 31 have 91 secondary grid lines (material is silver, and width is 60 microns, and thickness is 9 microns), and every secondary grid line is substantially in the longitudinal direction Through cell piece 31, and the distance between adjacent pair grid line is 1.7mm, and the back side of cell piece 31 has 5 back electrodes, and (material is Tin, width are 1.5 millimeters, and thickness is 10 microns), every back electrode substantially runs through cell piece 31, and adjacent two in the longitudinal direction The distance between back electrode is 31mm.

60 cell pieces 31 are arranged with a matrix type (6 rows 10 row), two adjacent cell pieces 31 in same row Between, an one metal wire back and forth prolongs between the front and the back side of another cell piece of a cell piece 31 in the state of tension It stretches, wire is tensioned lower reciprocation extension by being located at two clips of this two end of root silk.It is parallel to form 15 Conductor wire, and by the secondary grid line of a cell piece 31 and conductive wire bonding, by the back electrode of another cell piece 31 with it is conductive Wire bonding, welding temperature are 160 DEG C, and the distance between adjacent conductive line being mutually parallel is 9.9mm, thus by 10 batteries Piece series connection is in a row, and such battery strings of 6 rows are connected into cell array by busbar.Then, by upper glass plates, upper POE glue Film layer, arrange in the matrix form and the multiple cell pieces, lower POE adhesive films and the lower glass plate that are connected with wire from top to bottom according to It is secondary to stack, wherein so that the light-receiving surface of cell piece 31 is faced front adhesive film 20, front adhesive film 20 directly connects with conductor wire 32 It touches, so that the back side of cell piece 31 is faced back side adhesive film 40, be subsequently placed into laminating machine and be laminated, front adhesive film 20 is filled Between adjacent conductor wire 32, to which solar cell module A1 be made.

Comparative examples 1

Comparative examples 1 and example 1 difference lies in：

Cell piece 31 is arranged with a matrix type, and between two adjacent cell pieces 31, using as shown in figure 13 Wire drawing mode, 15 wires parallel to each other are tensioned by the clip 34 of every one metal wire end, cell piece is flattened, The tension of clip is 2N, by this each of 15 wire parallel to each other individually with the positive secondary grid line of cell piece 31 Welding, and welded with the back electrode at the back side of another cell piece, and the distance between the adjacent conductive line 32C being mutually parallel is 9.9mm (as shown in figure 13).To which solar cell module D1 be made.

Comparative examples 2

Comparative examples 2 and example 1 difference lies in：Cell piece is arranged with a matrix type, 15 are cascaded Wire paste in transparent adhesive tape film layer, wire is pasted in solar cell 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 films, 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 films and under Glass plate stacks successively from top to bottom.To which solar cell module D2 be made.

Example 2

Example 2 is used to illustrate the example of solar cell module of the application and preparation method thereof.

(1) wire S is prepared

Adhere to one layer of Sn40%-Bi55%-Pb5% alloy-layer on the surface of copper wire (fusing point is about 125 DEG C), wherein The cross-sectional area of copper wire is 0.03mm², the thickness of alloy-layer is 10 microns, to which wire S be made.

(2) solar cell module is prepared

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

60 cell pieces 31 are arranged with a matrix type (6 rows 10 row), two adjacent cell pieces 31 in same row Between, so that wire is back and forth prolonged in the state of tension between the front and the back side of another cell piece of a cell piece 31 It stretches, to form 20 parallel conductor wires, and by the secondary grid line of a cell piece ontology 31 and conductive wire bonding, by another The back electrode of cell piece ontology 31 and conductive wire bonding, welding temperature are 160 DEG C, and between the adjacent conductive line being mutually parallel Distance is 7mm, in a row to which 10 cell pieces be connected, and such battery strings of 6 rows are connected into cell array by busbar. Then, by upper glass plates, upper POE adhesive films, in the matrix form arrangement and with multiple cell pieces of welded wire, lower POE glue Film layer and lower glass plate stack successively from top to bottom, wherein the light-receiving surface of cell piece 31 is made to face front adhesive film, front glued membrane Layer 20 is in direct contact with conductor wire 32, so that the back side of cell piece 31 is faced back side adhesive film, is subsequently placed into laminating machine and carries out layer Pressure, front adhesive film 20 are filled between adjacent conductor wire 32, to which solar cell module A2 be made.

Example 3

Prepare solar cell module according to the method for example 2, with example 2 difference lies in：In the light of cell piece 31 Short grid line 33 (material is silver, width 0.1mm) is set on the secondary grid line 312 in face, the short grid line 33 is vertical with secondary grid line 312, The secondary grid line 312 of the edge portions of light-receiving surface for connecting cell piece 31 and conductor wire 32, as shown in figure 12, to be made too Positive energy battery component A3.

Example 4

Prepare solar cell module according to the method for example 3, with example 3 difference lies in：The connection side of cell array Formula is：Between adjacent two rows of cell pieces, conductor wire prolongs from the light-receiving surface of the cell piece of an end in a (a >=1) rows Stretch out simultaneously with a+1 arrange in adjacent end portion cell piece 31 the back side formed be electrically connected, for realizing it is adjacent two rows cell pieces it Between connection, and for connecting the conductor wire of adjacent two rows of cell piece 31 and being used to connect leading for adjacent cell piece 31 in this two rows Electric wire is mutually perpendicular to arrange.So obtained solar cell module A4.

Test case 1

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

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

As a result as shown in table 1 below.

Table 1

Solar cell module	A1	D1	D2	A2	A3	A4
							Wire drift phenomenon	Nothing	Slightly	Nothing	Nothing	Nothing	Nothing
Photoelectric conversion efficiency	16.5%	15.6%	15.7	16.7%	17.0%	17.2%
							Series resistance/milliohm	458	493	482	445	433	429
Fill 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
							Operating 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, 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 currents), 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 Component is under standard illumination condition when electric current, electric current when short-circuit；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.

Test case 2

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

(2) cell piece is horizontally placed on the test position of tension tester, briquetting will be placed on cell piece, briquetting is placed in The both sides of wire so that cell piece is not pulled up when test；

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

(4) start tensiometer, make tensiometer vertically upward uniform motion, wire is drawn from cell piece surface It rises, the pulling force data that record tensiometer measures, it is the pulling force data of the wire to take its mean value.

As a result as shown in table 2 below.

Table 2

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

It can be seen from the result of table 2 solar cell module of the embodiment of the present application by wire the glass from cell piece Glass removes required pulling force bigger, that is, illustrates the company of wire and cell piece during the solar cell of the embodiment of the present application is set up It is stronger to connect stability.

In the description of the present application, 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 It describes the application and simplifies to describe, do not indicate or imply the indicated device or element must have a particular orientation, with spy Fixed azimuth configuration and operation, therefore should not be understood as the limitation to the application.

In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply 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 this feature.In the description of the present application, the meaning of " plurality " is two or more, Unless otherwise specifically defined.

In this application unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or "lower" It may include that the first and second features are in direct contact, can also not be to be in direct contact but pass through it including the first and second features Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " include first special Sign is right over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.Fisrt feature exists Second feature " under ", " lower section " and " following " include fisrt feature right over second feature and oblique upper, or be merely representative of Fisrt feature level height is less than second feature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the application.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 embodiments or example in can be combined in any suitable manner.

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

Claims

1. a kind of solar cell module, which is characterized in that including the upper cover plate, front adhesive film, cell piece battle array being sequentially stacked Row, back side adhesive film and backboard, the battery chip arrays include multiple cell pieces, pass through a plurality of conductor wire between adjacent cell piece It is connected, at least two conductor wires are formed by wire of the reciprocation extension between the surface of adjacent cell piece, the conduction Line is contacted with the cell piece, the front adhesive film and the conductor wire be in direct contact and be filled in adjacent conductor wire it Between,

Wherein, wire reciprocation extension in a tensioned state before being contacted with the cell piece.

2. solar cell module according to claim 1, which is characterized in that the wire is in adjacent cell piece Reciprocation extension between the front and the back side of another cell piece of one cell piece, the front adhesive film and one battery Conductor wire on the front of piece is in direct contact and between the adjacent conductive line that is filled on the front of one cell piece, described Back side adhesive film and the conductor wire at the back side of another cell piece are in direct contact and are filled in another cell piece Between the adjacent conductive line at the back side.

3. solar cell module according to claim 2, which is characterized in that be located at the back side of another cell piece Conductor wire be electrically connected with the back electrode of another cell piece.

4. solar cell module according to any one of claim 1-3, which is characterized in that the wire back and forth prolongs 10-60 times is stretched to form 20-120 conductor wire.

5. solar cell module according to any one of claim 1-3, which is characterized in that between adjacent conductive line Spacing is 2.5-15mm.

6. solar cell module according to any one of claim 1-3, which is characterized in that adjacent conductive line forms U Shape structure or v-shaped structure.

7. solar cell module according to any one of claim 1-3, which is characterized in that the wire is one Root.

8. solar cell module according to any one of claim 1-3, which is characterized in that the wire is copper Silk.

9. solar cell module according to any one of claim 1-3, which is characterized in that the wire has circle Shape cross section.

10. solar cell module according to any one of claim 1-3, which is characterized in that the wire and institute The binding force between cell piece is stated in the range of 0.1-0.8 newton.

11. solar cell module according to claim 10, which is characterized in that the wire and the cell piece it Between binding force in the range of 0.2-0.6 newton.

12. solar cell module according to any one of claim 1-3, which is characterized in that the cell piece it is big Small is 156mm × 156mm；The series resistance of the solar cell module is milliohm/60 piece 380-440.

13. solar cell module according to any one of claim 1-3, which is characterized in that the cell piece it is big Small is 156mm × 156mm；The open-circuit voltage of the solar cell module is 37.5-38.5V/60 pieces；The solar cell The short circuit current of component is 8.9-9.4A.

14. solar cell module according to any one of claim 1-3, which is characterized in that the solar cell The fill factor of component is 0.79-0.82.

15. solar cell module according to any one of claim 1-3, which is characterized in that the cell piece it is big Small is 156mm × 156mm；The operating voltage of the solar cell module is 31.5-32V/60 pieces；The solar battery group The operating current of part is 8.4-8.6A.

16. solar cell module according to any one of claim 1-3, which is characterized in that the cell piece it is big Small is 156mm × 156mm；The transfer efficiency of the solar cell module is 16.5-17.4%；The solar module Power is 265-280W/60 pieces.

17. a kind of preparation method of solar cell module, which is characterized in that including：

By wire in a tensioned state reciprocation extension contact between the surface of cell piece and with the surface of the cell piece and It forms at least two conductor wires, adjacent cell piece and forms battery chip arrays by a plurality of conductor wire connects；

Upper cover plate, front adhesive film, the battery chip arrays, back side adhesive film and backboard are sequentially stacked, the cell piece is made Front face the front adhesive film, the front adhesive film is in direct contact with the conductor wire, makes the back of the body of the cell piece Face faces back side adhesive film, is then laminated, front adhesive film is filled between adjacent conductor wire, obtains solar cell Component.

18. the preparation method of solar cell module according to claim 17, which is characterized in that the wire is reciprocal One in adjacent cell piece is extended between the front of cell piece and the back side of another cell piece, front adhesive film with it is described The positive conductor wire of one cell piece is in direct contact；Back side adhesive film and the conductor wire at the back side of another cell piece are straight Contact.

19. the preparation method of solar cell module according to claim 18, which is characterized in that another described battery The conductor wire at the back side of piece is electrically connected with the back electrode on the back side of another cell piece.

20. the preparation method of the solar cell module according to any one of claim 17-19, which is characterized in that institute Wire reciprocation extension is stated 10-60 times to form 20-120 conductor wire.

21. the preparation method of the solar cell module according to any one of claim 17-19, which is characterized in that phase Spacing between adjacent conductor wire is 2.5-15mm.

22. the preparation method of the solar cell module according to any one of claim 17-19, which is characterized in that institute It is one to state wire.

23. the preparation method of the solar cell module according to any one of claim 17-19, which is characterized in that institute It is copper wire to state wire.