CN206727078U - Efficient dereliction grid cell piece solar components - Google Patents

Abstract

The purpose of this utility model is that providing one kind is based on prior art device, on the premise of modification equipment on a small quantity and technique, reduces the efficient dereliction grid cell piece solar components of production cost and raising generated energy.Including face glass, back glass, EVA layer and welding, also include dereliction grid cell piece, EVA layer is sealed between face glass and back glass, EVA layer inner sealing dereliction grid cell piece, adjacent dereliction grid cell piece is welded to connect by welding, laterally gather thin grid line in the front of dereliction grid cell piece, back side array is provided with backplate, the both ends of the vertical direction of the thin grid line of dereliction grid cell piece are provided with main grid end, without main gate line on thin grid line between main grid end, welding enhancing point and enhancing electrical connection effect portion are interval with the vertical line of thin grid line between main grid end.The utility model reduces cost, improves generated energy, has promoted the progress in China solar panel field significantly, has good market promotion prospect.

Description

Efficient dereliction grid cell piece solar components

Technical field

The utility model belongs to field of new energy technologies, more particularly to solar energy, and specifically one kind is efficiently without main grid Cell piece solar components.

Background technology

Global fossil energy crisis has promoted the fast development of photovoltaic industry with environmental pollution.At present, with crystal silicon electricity Component based on the piece of pond occupies more than the 80% of global photovoltaic module market；Crystal-silicon battery slice is developed so far, its cost of manufacture And generated energy turns into the main restricting factor of its development.In terms of cost of manufacture, silicon materials in occupation of about 60-70% material into Originally, material cost of the dosage of silver paste in occupation of about 15-25%；So the cost of high-purity crystal silicon material and its usage amount, with And the usage amount of silver paste all has significant effect to the cost of cell piece or component.In terms of generated energy, it is mainly by the sun The influence of the effective illuminating area of energy cell piece and photoelectric transformation efficiency；The photoelectric transformation efficiency heavy dependence crystal silicon material of cell piece The structure of material itself, effective illuminating area of cell piece is depending on cell piece master, the area coverage of thin grid line.

The generating matrix of crystal-silicon battery slice is silicon chip, conventional cell piece be printed on the thin grid line of many bars to collect silicon chip by Caused electric current after to illumination, and 2-5 bars main gate line is also printed on to collect the electric current on thin grid line.In low cost, high generating Under the urgency for measuring this target of cell piece, dereliction grid line cell chip technology arises at the historic moment.Dereliction grid line cell piece, generally referred to as On the basis of conventional batteries piece, remove main gate line and retain thin grid line；This cell piece, on the one hand can be significantly because without main gate line The usage amount of silver paste is reduced, can additionally increase effective illuminating area of cell piece.

On dereliction grid line cell chip technology, there are many methods at present and to enumerate part case as follows.

1. the Schmid of Germany removes the main gate line of cell piece without main gate line technology, and width thin grid line and Away from some adjustment have been done, common welding additionally is replaced come Series connection welding polylith cell piece with 15 copper wires.

2. Canadian Day4Electrode patented technologies remove the main gate line of cell piece and retain thin grid line, afterwards It is covered on thin grid with the film that low-melting-point metal copper wire is plated embedded with a row, then copper wire and thin grid is welded by laminating technology Come.

3. Lin Jianwei《Without main grid, high efficiency back contact solar module, component and preparation technology》[the patent No.：CN 104282788A] in mention, the main gate line of cell piece is removed the series connection point of cell piece is positioned over the cell piece back side simultaneously, this Kind method will further improve effective illuminating area of cell piece.

4. yellow strong《Photovoltaic battery module and preparation method thereof》[the patent No.：CN 104716213A] in mention, battery The main gate line of piece removes and retains thin grid line, while replaces common welding with conductive tape come Series connection welding cell piece.

5. it is in CN201820762U patents to authorize publication No., it is proposed that it is a kind of completely without the technical scheme of main gate line, Only retain thin grid line.

6. in CN103618011A patents, there is provided a kind of skill that main gate line is substituted using some weldings and some conductive tapes Art scheme.

But these prior arts all have ignored an objective fact, that is, existing equipment and known technology, it is right Above-mentioned technical proposal can not realize volume production, if using above-mentioned technical proposal, need large area to change production equipment, also, Change or improve crystal silicon battery chip architecture come reduce cell piece cost and improve cell piece generated energy, these methods typically have or Complex process, cost is high, or technique is not yet ripe, can not obtain for example above-mentioned patent of high volume applications 3..And change photovoltaic module The material of production, will bring substantial amounts of work adjustment, such as matching problem and equipment between the research and development of material, new material Update, 2., 4. this undoubtedly adds for example above-mentioned patent of component production cost.For similar to patent 1. without main gate line Battery chip technology, it is substantial amounts of real by us although not changing battery chip architecture and existing component production technology Checking, it is found that the adhesive force between copper wire and thin grid is too small, the electricity at its welding of battery film in the test of TC cycle reliabilities Connection is deteriorated, and rosin joint and disconnected grid phenomenon easily occurs in the welding position at cell piece both ends.Similar to prior art 5. 6., its The whole production technology of existing solar battery sheet is changed, therefore, does not have the possibility of volume production.

Above mentioned problem is attributed to：If 1. the technique of cell piece existing structure and component production is not changed, it is necessary to solve The problem that certainly welding comes with thin grid line welded bands, such as welding pulling capacity are too small, problem of faulty soldering easily occur.If 2. do not change Cell piece existing structure and only change component production technology, then have to find most suitable production technology and related material Material.If 3. not only changed cell piece existing structure and but also change component production technology, then must find most suitable production While technique and associated materials, ensure the stability and generated energy of cell piece again.

For above-mentioned three mentioned problems, different companies has different counter-measures.Such as German Schmid Neither change battery chip architecture without main gate line technology nor change component production technology, welded using copper wire and thin grid line； This will bring Railway Project：Automatic string welding machine improvement cost increases；The welding of copper wire and thin grid is unreliable (to be sent out in our experiment It is existing：Easily there is rosin joint, both ends easily tilt, the disconnected grid of small part).Canadian Day4Electrode patented technologies do not change electricity Pond piece existing structure and only change component production technology；This will bring Railway Project：The film manufacture difficulty for clamping copper wire increases, copper The electrical connection effect of silk and thin grid is difficult to ensure card very much.The back contact solar component of Lin Jianwei both changed cell piece existing structure and Change component production technology again；This will bring Railway Project：The stability and generated energy of cell piece are difficult to ensure that cell piece is connected Quality of materials and cell piece cascading effect are difficult to ensure that.

How on the basis of original component production technology is kept, the front electrode of cell piece is changed on a small quantity, significantly Cell piece and component production cost are reduced, and improves the generated energy of monolithic battery piece.Be current solar battery sheet field urgently Must solve the problems, such as.

The content of the invention

The purpose of this utility model is that providing one kind is based on prior art device, before modification equipment on a small quantity and technique Put, reduce production cost and improve the efficient dereliction grid cell piece solar components of generated energy.

In order to achieve the above object, the technical solution adopted in the utility model is：A kind of efficiently dereliction grid cell piece sun Energy component, including face glass, back glass, EVA layer and welding, in addition to dereliction grid cell piece, face glass and back side glass EVA layer, EVA layer inner sealing dereliction grid cell piece are sealed between glass, adjacent dereliction grid cell piece is welded to connect by welding, nothing Laterally gather thin grid line in the front of main grid cell piece, and back side array is provided with backplate, and the thin grid line of dereliction grid cell piece hangs down Nogata to both ends be provided with main grid end, without main gate line on the thin grid line between main grid end, between main grid end Thin grid line vertical line on be interval with welding enhancing point and enhancing electrical connection effect portion.

Welding enhancing point of the present utility model solves dereliction grid cell piece and void easily occurs in middle and both ends welding The problem of weldering, substantially increase the reliability of dereliction grid cell piece.

Enhancing electrical connection effect portion of the present utility model is to strengthen the soldering reliability between welding and thin grid line, for remedying Influenceed caused by failure welding；For example, when rosin joint phenomenon occurs in weld, the other end of thin grid can conduct electric current in enhancing Effect portion is electrically connected, then thus position is come together in welding, and remedying for rosin joint phenomenon is completed with this.

Connection between dereliction grid cell piece is welding welding, the covering join domain of welding for a pair of main grid ends with And this strengthens point to the thin grid line between main grid end and welding.

Welding connects adjacent dereliction grid cell piece, and its one end connects the front electrode of dereliction grid cell piece, other end connection The backplate of another dereliction grid cell piece.

Main grid end length is 2-20mm, and width 0.2-1.2mm, the quantity of main grid end is 2-6 pairs.

Main gate line tip shapes include rectangle, ellipse, triangle, circle, trapezoidal and irregular strip.

The length most preferably 2-10 millimeters of welding enhancing point, height most preferably 0.2-1.2 millimeters.

Welding enhancing point electrically connects effect portion point-blank with enhancing or is provided separately.

The size of rectangle welding is：Width 0.3-1.5mm, thickness 0.1-0.25mm；The size of toroidal welding is：Diameter D=0.2-0.5mm；Ellipticity welding size is：Major axis a=0.15-0.75mm, short axle b=0.05-0.125mm.

The width in enhancing electrical connection effect portion is 60-120 microns, and its height is 10-40 microns.

It is linear that enhancing electrical connection effect portion includes linear, rhombus, fold-line-shaped or rounding off.

The quantity of main grid end is 2-6 pairs.Generally, conventional cell piece includes the main gate line of different bar numbers, such as There are two main grid cell pieces, three main gate line cell pieces, four main gate line cell pieces, five main gate line cell pieces even a plurality of master Grid line cell piece.Different bar number main gate lines can have an impact to some aspects of cell piece, such as two main gate line cell pieces may Cell piece cost can be reduced but reduce its electric current collection ability, five main gate lines increase its electric current collection ability but increased Big silver paste usage amount and reduce effective illuminating area.

Although this utility model does not have main gate line, the cell piece need to coordinate welding to use, the termination that main gate line retains Number influences still to exist on it.By experiment, we have verified that the cell piece can coordinate thinner thinner welding to be used, So shading-area problem we can be with control in place.For retaining two or three pairs of main grid ends, it can further be reduced Silver paste usage amount, further increase the effective shading-area of silicon chip.For retaining five pairs or six pairs of main grid ends, it can ensure While existing generated energy, the ability that welding collects electric current in silicon chip is further lifted.And for the utility model, it is believed that Most preferably 4 pairs of the termination number that main gate line retains.

Main gate line tip shapes include rectangle, ellipse, triangle, circle, trapezoidal and irregular strip etc..

The shape of main grid end is on the premise of connection effect is ensured, shape is not fully fixed, people in the art The shape that member is readily conceivable that all should be in the scope of the utility model.

Crystal silicon solar batteries piece mainly by：Light is converted into the conductive material of electric high-purity crystal silicon material, collected current Including positive main gate line, the silver electrode of thin grid line and the back side, aluminium backboard, the key point of this patent removes the big portion of cell piece Point main gate line and retain the fraction at its both ends, set up welding enhancing point and enhancing electrical connection effect portion.According to current electricity Pond sheet material cost calculation, silicon materials account for 60-70%, and silver-colored dosage accounts for 15-25%；And silver usage amount in terms of on, just The silver amount of face electrode is relatively good, and backplate quality is not as front, generally positive fine silver, and the silver at the back side- Aluminium alloy, our such a design can be reduced silver-colored 70-75% used in crystal-silicon battery slice front electrode.

Generated energy is primarily to see cell piece or solar panel i.e. the power output P of the concatermer of polylith cell piece.It is logical Often, when the material of each structure of cell piece is determined, its generated energy power output P depends primarily on effective light Show up long-pending S, and the silicon materials in generating state are more, and its generated energy is necessarily bigger；And this patent use is proper without main gate line technology Reduce it well and cover the area of silicon materials, then coordinate thinner welding, the power output of solar panel can be increased about Increase 1-2% or so.Illustrated with more intuitive data, calculated by 10 megawatts of photovoltaic plant of generated energy, material can be saved Nearly 230-380 ten thousand yuans of cost.In addition, in terms of generated energy, the removal of main gate line and the use for coordinating special welding, It can increase 1%-the 2% of generating efficiency；Illustrated with more intuitive data, calculated by 10 megawatts of photovoltaic plant of generated energy, Annual electricity generating capacity can at least increase by 30-60 megawatts.

The equal water of prior art is reached as foundation, the other performance of this cell piece according to the related experiment carried out It is flat.

Solar energy crystal-silicon battery slice described in the utility model for component when manufacturing, by the way of Series connection welding Polylith cell piece is connected to one piece, such a mode does not change existing component production technology, substantially reduces component production cost.

The thin grid line of solar energy crystal-silicon battery slice described in the utility model, it is to be used to collect crystal silicon material by being produced after illumination Raw electric current.And the welding being welded on thin grid line then plays a part of collecting electric current on thin grid line.Also, main gate line both ends Member-retaining portion is used to strengthen electrical connection effect, enhancing welding pulling force.

The connected mode of polylith cell piece still uses Series connection welding, without changing welding material and need not change component Production technology and equipment.

The utility model reduces cost, improves generated energy, has for whole solar cell board industry and instructs to anticipate Justice, the progress in China solar panel field has been promoted significantly, there is good market promotion prospect.

Brief description of the drawings

Fig. 1 the utility model overall structure schematic cross-sections；

Fig. 2 the utility model dereliction grid cell piece front schematic views；

Fig. 3 the utility model dereliction grid cell piece schematic rear views；

Fig. 4 the utility model dereliction grid cell pieces are without welding side schematic view；

Fig. 5 the utility model main grid end mplifying structure schematic diagrams；

Fig. 6 the utility model main grid end mplifying structure schematic diagrams；

Fig. 7 the utility model main grid end mplifying structure schematic diagrams；

Fig. 8 the utility model main grid end mplifying structure schematic diagrams；

Fig. 9 the utility model main grid end mplifying structure schematic diagrams；

Rectangle welding structural representation used in Figure 10 the utility model；

In figure：1 cell piece；2 main grid ends；3 thin grid lines；4 backplates；5 face glass；6 back glass；7 weldings； 8EVA layers；9 welding enhancing points；The rectangle welding of 10 enhancing electrical connection effect portion 701；702 circular weldings；703 oval weldings.

Embodiment

The utility model is further described below in conjunction with the accompanying drawings.

Embodiment one

A kind of efficiently dereliction grid cell piece solar components, including face glass 5, back glass 6, EVA layer 8 and welding 7, Also include dereliction grid cell piece 1, EVA layer 8 is sealed between face glass 5 and back glass 6, the inner sealing of EVA layer 8 is without main grid Adjacent dereliction grid cell piece 1 is welded to connect by cell piece 1, welding 7, the horizontal thin grid line 3 that gathers in the front of dereliction grid cell piece 1, Back side array is provided with backplate 4, and the both ends of the vertical direction of the thin grid line 3 of dereliction grid cell piece 1 are provided with main grid end 2, without main gate line on the thin grid line 3 between main grid end 2, it is interval with the vertical line of the thin grid line between main grid end 2 Welding enhancing point 9 and enhancing electrical connection effect portion 10.

Connection between dereliction grid cell piece 1 is welded for welding, and the covering join domain of welding 7 is a pair of main grid ends And this strengthens point 9 to the thin grid line between main grid end and welding.

Welding 7 connects adjacent dereliction grid cell piece 1, the front electrode of its one end connection dereliction grid cell piece 1, and the other end connects Connect the backplate of another dereliction grid cell piece 1.

The length of main grid end 2 is 2-20mm, and width 0.2-1.2mm, the quantity of main grid end 2 is 2-6 pairs.

The shape of main grid end 2 includes rectangle, ellipse, triangle, circle, trapezoidal and irregular strip.

The length most preferably 2-10 millimeters of welding enhancing point 9, height most preferably 0.2-1.2 millimeters.

Welding enhancing point 9 electrically connects effect portion 10 point-blank with enhancing or is provided separately.

The size of rectangle welding 7 is：Width 0.3-1.5mm, thickness 0.1-0.25mm；The size of toroidal welding 7 is：Directly Footpath D=0.2-0.5mm；The size of ellipticity welding 7 is：Major axis a=0.15-0.75mm, short axle b=0.05-0.125mm.

The width in enhancing electrical connection effect portion 10 is 60-120 microns, and its height is 10-40 microns.

The quantity of main grid end 2 is 2-6 pairs.Generally, conventional cell piece includes the main gate line of different bar numbers, such as There are two main grid cell pieces, three main gate line cell pieces, four main gate line cell pieces, five main gate line cell pieces even a plurality of master Grid line cell piece.Different bar number main gate lines can have an impact to some aspects of cell piece, such as two main gate line cell pieces may Cell piece cost can be reduced but reduce its electric current collection ability, five main gate lines increase its electric current collection ability but increased Big silver paste usage amount and reduce effective illuminating area.

Although the crystal-silicon battery slice described in this utility model does not have main gate line, the cell piece need to coordinate welding to make With the termination number that main gate line retains influences still to exist on it.By experiment, it is thinner to have verified that the cell piece can coordinate for we Thinner welding.

Existing cell piece manufacture craft is：Crystalline silicon substrate-surface wool manufacturing-diffuses to form PN junction-surface coated with antireflection and applied Layer-print electrode.

Wherein crystalline silicon substrate is that (purity reaches more than 6N, i.e., 99.9999%) for high-purity polysilicon or monocrystalline silicon；

Silicon chip surface making herbs into wool refers to that carrying out corrosion in silicon chip surface forms scraggly shape, to increase silicon chip to the sun The capture rate of light.

Diffuse to form PN junction to refer to carry out silicon chip phosphorus or boron doping so that cell piece both sides form P-type silicon and N-type respectively Silicon；Silicon chip surface coated with antireflection film refers to deposit one layer of silicon nitride film in silicon chip surface, to reduce the reflectivity of sunshine.

The finger that prints electrode includes printing aluminium back surface field, backplate, thin grid line and main gate line respectively to silicon chip both sides.

The cell piece of prior art is the electricity that thin grid line deploys, main gate line deploys, backplate deploys Pond piece, then into component production process, the welding between two panels cell piece or multi-disc cell piece, welded using welding, Then plus EVA sealants, the assembling procedure of solar double-glass assemblies is finally entered.

The utility model in specific implementation process, cell piece for thin grid line deploys, main gate line tip placement finishes, Welding enhancing point deploys, strengthens electrical connection effect portion, the cell piece that backplate deploys.Subsequently enter component production Thin grid line is electrically connected by process, welding welding, welding, reaches current collection function, then adds EVA sealants, most laggard Enter the assembling procedure of solar double-glass assemblies.

Packaging process of the present utility model：The technological process of this solar double-glass assemblies is as follows：Cell piece screening-cell piece series connection Welding-stacking-lamination-cleaning deburring-installation terminal box-colloid solidifies-cleans deburring.

In this component the connected mode of cell piece use Series connection welding as shown in figure 1, the welding of special requirement with without main grid Line cell piece, which coordinates, completes welding.One end of the welding of certain length first is layed in the front of a cell piece, in the work of external force Under, welding is kept being physically contacted with main gate line member-retaining portion, thin grid line, and heating is then carried out to welding and cell piece so as to complete Welded into cell piece front.Then the back side of another cell piece is covered on foregoing welding, by heating so as to complete Welded into the cell piece back side.The Series connection welding for just completing cell piece several times so repeated.

Shown in the overlapped way of this component, multi-string battery piece to wrapping up, two blocks of glass are arranged in two layers of EVA respectively Two layers of EVA outermost.And cause EVA to produce crosslinking in laminating technology, cell piece is wrapped up and is bonding to two Block glass.

Certainly, the above is only preferred embodiment of the present utility model, it is impossible to is considered as being used to limit to utility model Scope of embodiments.The utility model is also not limited to the example above, and those skilled in the art are in this practicality The equivalent change made in new essential scope and improvement etc., all should belong to the utility model patent covering scope.

Claims (10)

1. a kind of efficiently dereliction grid cell piece solar components, including face glass (5), back glass (6), EVA layer (8) and weldering Band (7), it is characterised in that：Also include dereliction grid cell piece (1), EVA is sealed between face glass (5) and back glass (6) Adjacent dereliction grid cell piece (1) is welded to connect by layer (8), EVA layer (8) inner sealing dereliction grid cell piece (1), welding (7), nothing Laterally densely covered thin grid line (3), back side array are provided with backplate (4), dereliction grid cell piece (1) in the front of main grid cell piece (1) The both ends of vertical direction of thin grid line (3) be provided with main grid end (2), on the thin grid line (3) between main grid end (2) Without main gate line, welding enhancing point (9) and enhancing electrical connection effect are interval with the vertical line of the thin grid line between main grid end (2) Fruit portion (10).

2. efficiently dereliction grid cell piece solar components according to claim 1, it is characterised in that：Dereliction grid cell piece (1) connection between is welding welding, the covering join domain of welding (7) for a pair of main grid ends and this to main grid line end Thin grid line and welding enhancing point (9) between head.

3. efficiently dereliction grid cell piece solar components according to claim 2, it is characterised in that：Welding (7) connects phase Adjacent dereliction grid cell piece (1), the front electrode of its one end connection dereliction grid cell piece (1), the other end connect another without main grid The backplate of cell piece (1).

4. efficiently dereliction grid cell piece solar components according to claim 1, it is characterised in that：Main grid end (2) Length is 2-20mm, and width 0.2-1.2mm, the quantity of main grid end (2) is 2-6 pairs.

5. efficiently dereliction grid cell piece solar components according to claim 1, it is characterised in that：Main grid end (2) Shape includes rectangle, ellipse, triangle, circle, trapezoidal and irregular strip.

6. efficiently dereliction grid cell piece solar components according to claim 1, it is characterised in that：Welding enhancing point (9) Length most preferably 2-10 millimeters, width most preferably 0.2-1.2 millimeters.

7. efficiently dereliction grid cell piece solar components according to claim 1, it is characterised in that：Welding enhancing point (9) Effect portion (10) is electrically connected with enhancing point-blank or is provided separately.

8. efficiently dereliction grid cell piece solar components according to claim 1, it is characterised in that：Rectangle welding (7) Size is：Width 0.3-1.5mm, thickness 0.1-0.25mm；The size of toroidal welding 7 is：Diameter D=0.2-0.5mm；It is oval The size of shape welding 7 is：Major axis a=0.15-0.75mm, short axle b=0.05-0.125mm.

9. efficiently dereliction grid cell piece solar components according to claim 1, it is characterised in that：Enhancing electrical connection effect The width in portion (10) is 60-120 microns, and its height is 10-40 microns.

10. efficiently dereliction grid cell piece solar components according to claim 1, it is characterised in that：Enhancing electrical connection effect It is linear that fruit portion (10) includes linear, rhombus, fold-line-shaped or rounding off.