CN106206808B - Solar cell module and preparation method thereof - Google Patents

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, battery chip arrays include multiple cell pieces, multiple cell pieces are arranged into multiple rows of and multiple row matrix form, it is connected between at least two rows of cell pieces by a plurality of conductor wire, at least two conductor wires are formed by wire of the reciprocation extension between the surface of the cell piece of different rows, conductor wire is contacted with cell piece, front adhesive film and conductor wire are in direct contact and are filled between adjacent conductor wire.According to the solar cell module of the embodiment of the present 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；Front adhesive film and conductor wire are in direct contact and are filled between adjacent conductor wire, can ensure electricity conversion effectively by the isolations such as conductor wire and outside air, steam.

Description

Solar cell module and preparation method thereof

Technical field

The present invention relates to 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.Sunlight from cell piece ontology front into Entering battery, positive main grid and secondary grid can block a part of cell piece ontology, can not be transformed into electric energy according to luminous energy on the electrode, Be made it therefore, it is necessary to main grid and secondary grid more thinner better.However, the effect of main grid and secondary grid is to conduct electric current, from resistivity Angle analysis, main grid and secondary grid get over that detailed rules and regulations conduction cross-sectional area is smaller, and ohmic loss is bigger.Therefore main grid and the design of secondary grid be Balance is obtained between shading and conduction, while to consider cost.

Main grid in existing solar cell module is mostly three main grid structures, and main grid is printed on cell piece table for silver paste Then face is sintered.This main grid manufacture cost is higher, but technique is more mature.

In general, the solar cell module of mainstream uses 3 main grid solar battery sheets, and solar battery sheet is with matrix Form arrangement, specifically usually with 12 × 6 or 10 × 6 matrix-style arrange (i.e. n=12 or 10), respectively arrange between pass through remittance Stream item 9 is attached.This connection mode current path is longer, and resistance is larger, and easily generates rosin joint, so as to influence solar energy The electricity conversion of battery component.

Invention content

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

In the relevant technologies, it is expensive to make the main gate line of solar battery sheet and the slurry main component of secondary grid line 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 is needed 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 relevant technologies, the front of cell piece is typically provided with two main gate lines, two main gate lines by cell piece just Face coating silver paste is formed, and the width of main gate line is big (for example, width reaches more than 2mm), and thus consumption silver content is big, cell piece Production cost is high.

In the relevant technologies, it is proposed that there is the solar battery sheet of 3 main gate lines, but there are still consumption silver content and costs Height moreover, 3 main gate lines increase shading-area, reduces transfer efficiency.

In addition, the raising of main gate line quantity is also limited by welding, main gate line quantity is bigger, and single main grid is thinner, weldering The band the 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 relevant technologies Silver-colored main gate line replace with wire, such as copper wire, by copper wire with secondary grid line welding so as 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 relevant technologies using the hyaline membrane of wire and battery lamella swaging will be adhesive with 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, wire is made to be 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, so as 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 situation there is also loose contact with cell piece, seriously affect its electrical property, therefore need The radical of wire is increased, but the radical of wire increases, and can influence the absorptivity of positive light, affects the property of product Can, therefore, do not promote and be commercialized using the product of this scheme.In addition, the as described above, radical of a large amount of parallel wires Nevertheless suffer from the limitation of the spacing between adjacent wire.

For example, a kind of technical solution that wire is fixed 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 between hyaline membrane and cell piece due to the interval of main gate line with cell piece, It will be there are gap, so as to cause the poor sealing of cell piece component, due to air and steam between hyaline membrane and cell piece 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 causes it as too since the factor of various aspects considers, such as shading surface, conductivity, equipment, technique, cost etc. Difficult point and hot spot in positive energy battery technology.Those skilled in the art just make on the market too by the effort of several generations many times Positive energy cell piece became three main grid solar cells at 2007 or so by two main grid solar cells, and a small amount of producer was in 2014 Left and right proposes the solar cell of four main grids, and the technology of more main grids is also the concept just proposed in recent years, but realizes more tired Difficulty 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, the dereliction grid solar cell is expensive without being printed on cell piece Silver-colored main gate line, without welding, reduce cost, and can be commercialized, prepare it is simple easily realize, it is particularly 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 upper cover plate, the front glue being sequentially stacked Film layer, battery chip arrays, back side adhesive film and backboard, the battery chip arrays include multiple cell pieces, the multiple cell piece Multiple rows of and multiple row matrix form is arranged into, is connected between at least two rows of cell pieces by a plurality of conductor wire, at least described in two Conductor wire is formed by wire of the reciprocation extension between the surface of the cell piece of different rows, the conductor wire and the cell piece Contact, 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 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 setting wire, is not limited by a space, the item number for the conductor wire being made of wire reciprocation extension can To greatly improve, prepare 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：By multiple cell pieces Be arranged into multiple rows of and multiple row battery chip arrays, by the surface of a cell piece of the wire reciprocation extension in a row with it is another To form at least two conductor wires between the surface of a cell piece in row, the cell piece of difference row is connected by conductor wire； Upper cover plate, front adhesive film, the battery chip arrays, back side adhesive film and backboard are sequentially stacked, make the cell piece just Face faces the front adhesive film, and front adhesive film is in direct contact with the conductor wire, makes the back side of the cell piece in face of the back of the body Face adhesive film, is then laminated, and front adhesive film is filled between adjacent conductor wire, obtains solar cell module.

Description of the drawings

The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment Significantly and it is readily appreciated that, wherein：

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 the schematic cross-section according to the longitudinal direction of 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 embodiment

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

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

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

" battery sheet matrix 311 " is such as can the process as silicon chip through making herbs into wool, diffusion, etching edge, deposited silicon nitride layer The intermediate products obtained afterwards, it should be understood that in the application, battery sheet matrix 311 is not limited to be made 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 other class solar cells without front electrode.

The conductor wire 32 that term " battery unit " is formed including cell piece 31 and by wire S.

Term " solar cell chip arrays 30 " is connected and with by adjacent cell piece 31 by metal including multiple cell pieces 31 The conductor wire 32 that silk S is formed, 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 forms the conductor wire 32 of battery unit, and wire S extends in phase It should broadly understood between the surface of adjacent cell piece 31, wire S can extend between the front of adjacent cell piece 31, also may be used To extend between the front of a cell piece 31 in adjacent cell piece 31 and the back side of another cell piece 31.In wire When S is extended between the front of in adjacent cell piece 31 cell piece 31 and the back side of another cell piece 31, conductor wire 32 can include extending in the front side conductive line 32A being electrically connected on the front of 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 314 of cell piece 31, 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 it is not intended that limitation to the application.

All ranges disclosed in this application can all be combined comprising endpoint and independently.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 to include 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, the upper cover being sequentially stacked is included 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, multiple cell pieces 31 are arranged into multiple rows of and multiple row matrix form, pass through a plurality of conduction between at least two rows of cell pieces 31 Line 32 is connected, and at least two conductor wires 32 are by the wire S-shaped between the surface of cell piece of the reciprocation extension in different rows Into conductor wire 32 is contacted with cell piece 31, and front adhesive film 20 is in direct contact with conductor wire 32 and is filled in adjacent conductor wire Between 32.

In same row's cell piece, it is connected between adjacent cell piece 31 by a plurality of conductor wire 32, at least two conductor wires 32 It is formed by wire S of the reciprocation extension between the surface of adjacent cell piece 31, wire S reciprocation extensions are in adjacent cell piece Between the surface of one cell piece 31 and the surface of another cell piece 31.

The present invention does not limit to all conductor wires and is formed by wire coiling, can be partly by wire coiling shape Into, it can also be whole, reciprocation extension can be back and forth primary, and also there is no limit starting point and terminations for the terminating point of reciprocation extension Point can be on same cell piece or on different cell pieces, as long as containing around.

Specifically, included being sequentially stacked upper cover along the vertical direction according to the solar cell module 100 of the embodiment of the present application Plate 10, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50, battery chip arrays 30 are by being at least arranged into Two rows of and two row 4 cell pieces 31 are formed, wherein, pass through a plurality of conduction between the two neighboring cell piece 31 of same row Line 32 is connected, and conductor wire 32 is made of wire S of the reciprocation extension between two neighboring cell piece 31, and wire S back and forth prolongs It is stretched outside on the surface of two adjacent cell pieces 31.Also by a plurality of conduction between the two neighboring cell piece 31 of same row Line 32 is connected, and conductor wire 32 is made of wire S of the reciprocation extension between two neighboring cell piece 31, and wire S back and forth prolongs It is stretched outside on the surface of two adjacent cell pieces 31.

Conductor wire 32 is electrically connected with cell piece 31, wherein, front adhesive film 20 and conductor wire 32 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, so as to which conductor wire 32 be avoided to be 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 setting wire S, is not limited by a space, is made of wire S reciprocation extensions The radical 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 conductor wire and the secondary grid line and the back of the body of 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, multiple batteries according to the solar cell chip arrays 30 of the embodiment of the present application Piece 31 is arranged into multiple rows of and multiple row matrix form, it is at least two rows of between by reciprocation extension the cell piece 31 of different rows table Between face and the wire of composition conductor wire 32 is connected.

Here, cell piece 31 forms electricity with the conductor wire 32 formed by extending in the wire S on 31 surface of cell piece In other words pool unit, is made of, multiple batteries according to the solar cell chip arrays 30 of the embodiment of the present application multiple battery units 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 to the surface of the last one cell piece 31 returns from the surface of the last one cell piece 31 and extends through described predetermined The surface of the intermediate cell piece 31 of quantity to the surface of first cell piece 31 so repeats.

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

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

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

According to the battery chip arrays 30 of the embodiment of the present application, the conductor wires 32 of multiple cell pieces 31 by reciprocation extension metal Silk S is formed, and is connected between adjacent cell piece 31 by conductor wire 32, and therefore, cell piece surface need not print expensive Silver-colored main grid, and manufacturing process is simple, and the secondary grid line and the back of the body of cell piece, 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 battery chip arrays 30 is used to manufacture solar cell module 100, 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, it is 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 embodiments of the application, in same row's cell piece 31, wire S reciprocation extensions are in adjacent electricity In pond piece 31 between the surface of cell piece 31 and the surface of another cell piece 31.

Optionally, in this application, a cell pieces 31 of the wire S in adjacent cell piece 31 front and another Reciprocation extension between the back side of cell piece 31, front adhesive film 20 directly connect with the conductor wire 32 on the front of a cell piece 31 Between the adjacent conductive line 32 for touching and being filled on the front of a cell piece 31, back side adhesive film 40 and another cell piece 31 The back side conductor wire 32 be in direct contact and be filled in another cell piece 31 the adjacent conductive line 32 at the back side between.

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.

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 or similar to the back side of the secondary grid line on cell piece front side of matrix by silver paste Secondary grid line 312B, or discrete multiple weld parts, in this application, unless expressly stated otherwise, secondary grid line refers to electricity Secondary grid line 312 on the front of pond sheet matrix 311.

As shown in Figs. 1-3, in this embodiment, (for convenience, solar cell chip arrays include two cell pieces Referred to herein as the first cell piece 31A, the second cell piece 31B), wire S reciprocation extensions the front of the first cell piece 31A (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 is single, in other words, single metal wire reciprocation extension 12 formation, 24 conductor wires, between adjacent conductive line Spacing can be 2.5 millimeters -15 millimeters.Certainly, wire of the present invention is not limited to single coiling, can be more, It can be 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, so as to Distance of the electric current from secondary grid line to conductor wire is reduced, reduces resistance, improves electricity conversion.Reality shown in Fig. 1 It applies in example, adjacent conductive line forms U-shaped structure, thus convenient for the coiling of wire.Optionally, the application is not limited to this, example Such as, adjacent conductive line 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 the as shown in figure 4, connecting material layer that wire S includes wire ontology 321 and its outer surface coats 322, connecting material layer 322 can be conductive adhesive layer or welding layer, and wire passes through the welding layer of cladding and secondary grid line and/or the back of the body Electrode welding, being electrically connected convenient for wire and secondary grid line and/or back electrode, avoids wire in connection procedure from drifting about 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 can include the connecting material layer of 321 external sheath of wire ontology 321 and wire ontology 322, i.e. wire S can also be included wire ontology 321 and be coated on the connecting material layer of 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 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 Extension, i.e., stretch wire, after the secondary grid line and back electrode with cell piece are connect, can discharge the tensioning of wire Thus power further avoids the conductor wire when preparing solar cell module from drifting 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 electrode of 31B can also be connected by the back side conductor wire that another wire reciprocation extension is formed, 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, along direction from left to right, the cell piece 31 in same row's cell piece 31 is successively The cell piece 31 of referred to as first, second, third, fourth, the 5th and the 6th, along direction from the top down, the row of cell piece 31 is successively The row's cell piece 31 of referred to as first, second, third, fourth, the 5th and the 6th.

In same row's cell piece 31, wire reciprocation extension is on the surface of a cell piece 31 and another adjacent battery Between the surface of piece 31, in 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, positioned at the right side of matrix.

More specifically, in the embodiment shown in fig. 6, in the first row, first battery of one metal wire reciprocation extension Between the back side between the front of piece 31 and the second cell piece 31, the front of second the second cell piece of one metal wire reciprocation extension 31 Between the back side between third cell piece 31, front and the 4th battery of third one metal wire reciprocation extension third cell piece 31 Between the back side between piece 31, between the front of the 4th cell piece 31 of the 4th one metal wire reciprocation extension and the 5th cell piece 31 Between the back side, between the back side between the front of the 5th cell piece 31 of the 5th one metal wire reciprocation extension and the 6th cell piece 31, 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 Example 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 setting busbar, one The conductor wire that busbar connection is extended from the left side of the first cell piece 31 of first row, another busbar connection is from the 6th row's The conductor wire that the left side of first cell piece 31 is extended.

As shown in the figure and above-mentioned, connection between the cell piece of the embodiment of the present application is connected using conductor wire, first row, the Series connection is realized using conductor wire between two rows, third row, the 4th row, the 5th row and the 6th row, as shown in the figure, wire can be with Extend for connecting other loads outside cell piece, for example, alternatively it is also possible between second row and third row, the 4th row And the 5th is in parallel for preventing the diode of spottiness between row, those skilled in the art's public affairs may be used in the connection of diode The technology known, 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 set in the left or right side of respective row and busbar is set respectively.

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 embodiments 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, it is 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 loose contact and caused by hydraulic performance decline, while cost It is relatively low.

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

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

In some specific embodiments of the application, the fill factor of solar cell module is 0.79-0.82, no It is influenced by the size and number of cell piece, influences the electrical property of battery.

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

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

Included according to the preparation method of the solar cell module 100 of the embodiment of the present application first by multiple 31 rows of cell piece Cloth is into multiple rows of and multiple row battery chip arrays 30, by the surface of a cell piece 31 of the wire reciprocation extension in a row and separately To form at least two conductor wires 32 between the surface of a cell piece 31 in one row, the cell piece 31 of difference row passes through conduction Line 32 is connected.

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

In other words, according to the solar cell module of the application 100 in the preparation, multiple cell pieces 31 are arranged into first Multiple rows of and multiple row battery chip arrays 30, then by wire S reciprocation extensions on the surface of the adjacent cell piece 31 of same row The conductor wire 32 formed on multiple same rows above and with the surface of cell piece 31 is contacted, then by wire S reciprocation extensions in a row In a cell piece 31 surface and another row in a cell piece 31 surface between form leading in multiple same rows Electric wire 32

Then upper cover plate 10, front adhesive film 20, battery chip arrays 30, back side adhesive film 40 and backboard 50 are folded successively Put, 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, prepare the first cell piece 31 and the second battery body.Next, as shown in figure 9, by the front of the first cell piece 31 and metal Silk is connected and the back side of the second cell piece 31 is connected with wire, and battery chip arrays 30 are consequently formed, two are shown in Fig. 9 Cell piece 31, as described above, when battery chip arrays 30 have multiple cell pieces 31, using the wire of reciprocation extension by one The front of cell piece 31 is connected with the back side of another adjacent cell piece 31, i.e., by the secondary grid line of cell piece 31 and another The back electrode of a cell piece 31 is connected with wire.Wire is tensioned by being located at two clips of this two end of root silk respectively Lower reciprocation extension, the wire only need two clips that coiling can be realized, greatly reduce the dosage of clip, save assembling Space.

In the embodiment shown in fig. 9, adjacent cell piece is one another in series, as described above, as needed, adjacent cell piece can To be connected in parallel to each other by wire.

By the battery chip arrays 30 being prepared and upper cover plate 10, front adhesive film 20, back side adhesive film 40 and backboard 50 It is sequentially stacked, and the front of the cell piece 31 is made to face the back of the body in face of the back side of the front adhesive film 20, the cell piece 31 Then face adhesive film 40 is laminated to obtain solar cell module 100.It is understood that wire can with cell piece 31 To bond or weld, the connection of wire and cell piece 31 can carry out in lamination process, it is of course also possible to first connect, after Lamination.

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

Example 1

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

(1) wire S is prepared

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

(2) solar cell module 100 is prepared

The POE adhesive films (melt temperature is 65 DEG C) that size is 1630 × 980 × 0.5mm are provided, and 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 arrange), two adjacent cell pieces 31 in same row Between, an one metal wire back and forth prolongs between the front of cell piece 31 and the back side of another cell piece in the state of tension It stretches, wire passes through the lower reciprocation extension of the two clips tensioning for being located at this two end of root silk respectively., it is parallel so as 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 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, making the light-receiving surface of cell piece 31, front adhesive film 20 directly connects with conductor wire 32 in face of front adhesive film 20 It touches, the back side of cell piece 31 is made to be subsequently placed into laminating machine and be laminated, front adhesive film 20 is filled in face of back side adhesive film 40 Between adjacent conductor wire 32, so as 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 by the clip 34 of every one metal wire end are tensioned, 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, and the distance between adjacent conductive line being mutually parallel is with the back electrode at the back side of another cell piece 9.9mm.So as 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.So as to which solar cell module D2 be made.

Example 2

Example 2 is used for the example for illustrating the 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 (fusing point is about 125 DEG C) on the surface of copper wire, wherein, The cross-sectional area of copper wire is 0.03mm², the thickness of alloy-layer is 10 microns, so as 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 pairs grid line is 1.7mm, the back side of cell piece 31 is electric equipped with 5 back ofs the body 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 arrange), two adjacent cell pieces 31 in same row Between, state of the wire in tension between the front of cell piece 31 and the back side of another cell piece is made back and forth to prolong It stretches, so as to form 20 parallel conductor wires, and by the secondary grid line of a cell piece 31 and conductive wire bonding, welding temperature is 160 DEG C, by the back electrode of another cell piece 31 and conductive wire bonding, and the distance between adjacent conductive line being mutually parallel is 7mm, it is in a row so as to which 10 cell pieces be connected, such battery strings of 6 rows are connected into array by busbar.Then, By upper glass plates, upper POE adhesive films, in the matrix form arrangement and multiple cell pieces with welded wire, lower POE adhesive films and Lower glass plate stacks successively from top to bottom, wherein, make the light-receiving surface of cell piece 31 in face of front adhesive film, front adhesive film 20 with Conductor wire 32 is in direct contact, and the back side of cell piece 31 is made to face back side adhesive film, is subsequently placed into laminating machine and is laminated, front Adhesive film 20 is filled between adjacent conductor wire 32, so as to which solar cell module A2 be made.

Example 3

Solar cell module is prepared 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 in face, and the short grid line 33 is vertical with secondary grid line, for even The secondary grid line and conductor wire of the edge portions of the light-receiving surface of cell piece are connect, as shown in figure 12, so as to which solar cell module be made A3。

Example 4

Solar cell module is prepared according to the method for example 3, with example 3 difference lies in：The connection of array Mode is：Between adjacent two rows of cell pieces, conductor wire from a (a >=1) row in an end cell piece light-receiving surface The back side of the cell piece 31 of adjacent end portion, which is formed, in extending and being arranged with a+1 is electrically connected, and is used to implement adjacent two rows of cell pieces Between connection, and for connect the conductor wire of adjacent two rows of cell piece 31 with for connecting adjacent cell piece 31 in this two rows Conductor 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) method according to disclosed in IEC904-1 is prepared above-mentioned example and comparative examples using single flash operation simulator Solar cell module is tested, and test condition is standard test condition (STC)：Light intensity is 1000W/m²；Spectrum is AM1.5；Temperature is 25 DEG C, records the photoelectric conversion efficiency of each cell piece.

As a result it is 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 during theoretically zero internal resistance that fill factor represents 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 represents the practical maximum power of component and theoretical maximum power Ratio, numerical value is bigger, and assembly property is better；Open-circuit voltage be component under standard illumination condition, voltage during open circuit；Short circuit Component is under standard illumination condition during electric current, electric current when short-circuit；Operating voltage be component under standard illumination condition, with maximum Output voltage when power works；Operating current be component under standard illumination condition, output when being worked with maximum power electricity Stream；Power be 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 during 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 takes the pulling force data that its mean value is the wire.

As a result it is 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 in the solar cell establishment of the embodiment of the present application It is stronger to connect stability.

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

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

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

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

In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments " The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment of the present invention or example.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 combine in an appropriate manner.

Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art are not departing from the principle of the present invention and objective In the case of can make changes, modifications, substitutions and variations to the above described embodiments within the scope of the invention.

Claims (28)

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, and the multiple cell piece is arranged into multiple rows of and more It is connected between the matrix form of row, at least two rows cell pieces by a plurality of conductor wire, at least two conductor wires are by back and forth prolonging The wire being stretched outside between the surface of the cell piece of different rows is formed, and the conductor wire is contacted with the cell piece, the front Adhesive film and the conductor wire are in direct contact and are filled between adjacent conductor wire, and the wire connects with the cell piece Reciprocation extension in a tensioned state before touching.

2. solar cell module according to claim 1, which is characterized in that in same row's cell piece, adjacent cell piece Between be connected by a plurality of conductor wire, gold of at least two conductor wires by reciprocation extension between the surface of adjacent cell piece Belong to silk to be formed, the wire reciprocation extension surface of a cell piece and surface of another cell piece in adjacent cell piece Between.

3. solar cell module according to claim 2, which is characterized in that the multiple cell piece is arranged into n × m's Matrix form, in adjacent two rows cell pieces, surface and the a+ of a cell piece of the wire reciprocation extension in a rows Between the surface of a cell piece in 1 row, wherein n is matrix column number, numbers of rows of the m for matrix, and m-1 >=a >=1.

4. solar cell module according to claim 3, which is characterized in that in adjacent two rows of cell pieces, the gold Belong to silk reciprocation extension on the surface of the cell piece positioned at the end that a is arranged and the battery positioned at the end of a+1 rows Between the surface of piece, the end of a rows is located at the same side of the matrix with the a+1 end arranged.

5. solar cell module according to claim 3 or 4, which is characterized in that in same row's cell piece, the gold Belong to silk reciprocation extension in the positive between the back side of another adjacent cell piece of cell piece,

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

6. solar cell module according to claim 3 or 4, which is characterized in that in same row's cell piece, the gold Belong to silk reciprocation extension in the positive between the back side of another adjacent cell piece of cell piece,

In adjacent two rows of cell pieces, the wire reciprocation extension is in the back of the body of the cell piece positioned at the end that a is arranged Between face and the front of a cell piece positioned at the end of a+1 rows, with adjacent two rows of cell piece of connecting.

7. according to the solar cell module described in any one of claim 2-4, which is characterized in that reciprocation extension is in same row Adjacent cell piece between wire for one, and wire of the reciprocation extension between the cell piece of adjacent row is one.

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

9. according to the solar cell module described in any one of claim 1-4, which is characterized in that between adjacent conductive line Spacing is 2.5-15mm.

10. according to the solar cell module described in any one of claim 1-4, which is characterized in that adjacent conductive line forms U Shape structure or v-shaped structure.

11. according to the solar cell module described in any one of claim 1-4, which is characterized in that the wire is copper Silk.

12. according to the solar cell module described in any one of claim 1-4, which is characterized in that the wire has Circular cross section.

13. according to the solar cell module described in any one of claim 1-4, 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.

14. according to the solar cell module described in any one of claim 1-4, which is characterized in that the cell piece it is big Small is 156mm × 156mm；The series resistance of the solar cell module is 380-440 milliohm/60 piece.

15. according to the solar cell module described in any one of claim 1-4, 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；Short circuit current is 8.9- 9.4A。

16. according to the solar cell module described in any one of claim 1-4, which is characterized in that the solar cell The fill factor of component is 0.79-0.82.

17. according to the solar cell module described in any one of claim 1-4, 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；Operating current is 8.4- 8.6A。

18. according to the solar cell module described in any one of claim 1-4, 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%；Power is 265-280W/60 Piece.

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

Multiple cell pieces are arranged into multiple rows of and multiple row battery chip arrays, by an electricity of the wire reciprocation extension in a row To form at least two conductor wires between the surface of a cell piece in the surface of pond piece and another row, the cell pieces of difference row It is connected by conductor wire；

Upper cover plate, front adhesive film, the battery chip arrays, back side adhesive film and backboard are sequentially stacked, make the cell piece Front in face of 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, wire reciprocation extension in a tensioned state before being contacted with the cell piece.

20. the preparation method of solar cell module according to claim 19, which is characterized in that back and forth prolong wire It is stretched outside between the surface of a cell piece in same row and the surface of another cell piece, thus the adjacent electricity in same row Pond piece connects the row to form battery chip arrays by the conductor wire.

21. the preparation method of solar cell module according to claim 20, which is characterized in that the multiple cell piece It is arranged into the matrix form of n × m, in adjacent two rows cell pieces, a cell piece of the wire reciprocation extension in a rows Surface and a cell piece in a+1 rows surface between, wherein n is matrix column number, and m is the number of rows of matrix, and m-1 ≥a≥1。

22. the preparation method of solar cell module according to claim 21, which is characterized in that in adjacent two rows of batteries In piece, make the wire reciprocation extension on the surface of the cell piece positioned at the end that a is arranged with being located at the one of a+1 rows Between the surface of the cell piece of a end, wherein the end of a rows and the end of a+1 rows are located at institute State the same side of matrix.

23. the preparation method of the solar cell module according to claim 21 or 22, which is characterized in that in same row electricity In the piece of pond, make the wire reciprocation extension in the positive between the back side of another adjacent cell piece of cell piece,

In adjacent two rows of cell pieces, make the wire reciprocation extension in the cell piece positioned at the end that a is arranged Between the back side of a cell piece positive and positioned at the end of a+1 rows, with adjacent two rows of cell pieces of connecting.

24. the preparation method of solar cell module according to claim 23, which is characterized in that in same row's cell piece In, make the wire reciprocation extension in the positive between the back side of another adjacent cell piece of cell piece,

In adjacent two rows of cell pieces, make the wire reciprocation extension in the cell piece positioned at the end that a is arranged Between the back side and the front of a cell piece positioned at the end of a+1 rows, with adjacent two rows of cell piece of connecting.

25. the preparation method of the solar cell module according to any one of claim 20-22, which is characterized in that past The wire extended in again between the adjacent cell piece of same row is one, and reciprocation extension is between the cell piece of adjacent row Wire is one.

26. the preparation method of the solar cell module according to any one of claim 19-22, which is characterized in that institute Wire reciprocation extension is stated 10-60 times to form 20-120 conductor wire.

27. the preparation method of the solar cell module according to any one of claim 19-22, which is characterized in that phase Spacing between adjacent conductor wire is 2.5-15mm.

28. the preparation method of the solar cell module according to any one of claim 19-22, which is characterized in that institute Wire is stated as copper wire.