CN105789359A - Manufacturing method for double-face solar energy cell assembly - Google Patents
Manufacturing method for double-face solar energy cell assembly Download PDFInfo
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- CN105789359A CN105789359A CN201610189201.XA CN201610189201A CN105789359A CN 105789359 A CN105789359 A CN 105789359A CN 201610189201 A CN201610189201 A CN 201610189201A CN 105789359 A CN105789359 A CN 105789359A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 44
- 238000005520 cutting process Methods 0.000 claims abstract description 38
- 238000010521 absorption reaction Methods 0.000 claims description 43
- 238000003475 lamination Methods 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 23
- 239000004020 conductor Substances 0.000 claims description 13
- 238000004021 metal welding Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000012805 post-processing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000002313 adhesive film Substances 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 11
- 229910052751 metal Inorganic materials 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 229910000679 solder Inorganic materials 0.000 abstract 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 20
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 20
- 238000010586 diagram Methods 0.000 description 16
- 238000003466 welding Methods 0.000 description 10
- 239000012634 fragment Substances 0.000 description 7
- 239000011521 glass Substances 0.000 description 7
- 238000010030 laminating Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000003760 hair shine Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical group [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 108091092195 Intron Proteins 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Condensed Matter Physics & Semiconductors (AREA)
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Abstract
The invention discloses a manufacturing method for a double-face solar energy cell assembly. According to the method, different double-face cell structures are designed, cells are cut according to a grid line structure, the cells after cutting are connected in series to form cell strings, the cell strings are connected in series or parallel, preferably in parallel, a combined series and parallel structure can effectively reduce internal transmission loss of the assembly and can realize great reduction even omission of use of metal solder strips in an assembly manufacturing process, so assembly cost is effectively reduced, and heat spot resistance capability of the assembly can be enhanced through parallel connection increase. The invention further discloses the solar energy cell assembly manufactured through the method.
Description
Technical field
The invention belongs to solar module technical field, be specifically related to the manufacture method of a kind of double-sided solar battery assembly.
Background technology
It is utilize solar energy that the mankind obtain the most direct mode of the energy, and solar-energy photo-voltaic cell is one of most effective mode converting the solar into electric energy.In recent years, solaode world wide production, with the speed increment of annual 30～40%, became one of industry with fastest developing speed in the market, and wherein crystal silicon solar energy battery is day by day full-fledged, occupies the leading position in market.
Development along with crystal silicon solar energy battery technology, various high-efficiency battery technology are also ripe gradually, such as full back contact battery, passivation on double surfaces double-side cell, HIT battery etc., compared with conventional batteries, these high-efficiency battery usable front panel and reverse panels have good passivation, current/voltage is higher, and particularly double-side cell is owing to tow sides can absorb light thus producing photo-generated carrier, thus has higher short circuit current.In general components makes, the interconnection between cell piece often adopts series system, and the electric current of battery is more high, and component power transmission loss on interconnector is more big.Therefore when utilizing these high efficient two-sided batteries to make assembly, if still using the welding interconnection technique of routine, certainly will it is envisioned that the power loss from battery to assembly will be significantly high, the high conversion efficiency that battery-end obtains can not be embodied completely at assembly end, and therefore people are also seeking various scheme to realize the lifting of solar module power.Battery loses two kinds to the main spectroscopy loss of power loss and the electricity of assembly, optical loss is main and the absorption of the material such as glass, EVA and reflect relevant, electricity loss is then mainly derived from inside battery, the loss etc. of interconnector, busbar, rosette and cable thereof, if the internal resistance of these connecting materials can not be effectively reduced, major part energy will lose with the form of heat rather than is converted into electric energy.
In this case, present invention applicant is devoted to propose a kind of new assembly making method, and this method can effectively reduce the internal resistance loss that interconnector itself brings, and promotes component power and then reduces cost of electricity-generating.
Summary of the invention
First purpose of the present invention is in that to provide the manufacture method of a kind of double-sided solar battery assembly, and this method can reduce the battery power loss to assembly, fully demonstrates the advantage of high-efficiency battery, reduces cost of electricity-generating.
Second purpose of the present invention is in that the double-sided solar battery assembly providing the battery component manufacture method adopting above-mentioned double-sided solar to make.
First purpose of the present invention is to be achieved through the following technical solutions: the assembly making method of a kind of double-sided solar battery, comprises the following steps:
(1) choose two-sided absorption solar battery sheet, solar battery sheet is cut into multiple compact battery sheet；
(2) the multiple compact battery sheets after cutting are connected mutually, form multiple battery strings, more multiple battery strings are connected, form battery strings group；
(3) according to order from top to bottom, cover plate materials, EVA and/or POE, battery strings group, EVA and/or POE, back veneer material are laid；
(4) through including EL test after having laid, lamination postprocessing working procedures processes, and namely prepares double-sided solar battery assembly；
Wherein the two-sided absorption solar battery sheet described in step (1) is p-type two-sided absorption solaode and/or the two-sided absorption solaode of n-type, or described two-sided absorption solar battery sheet is back contact solar cell sheet.
These two-sided absorption solar battery sheets can be right angle or rounded corner battery sheet, and the width of these two-sided absorption solaodes is preferably 100～200mm.
And, these two-sided absorption solar battery sheets are as far as possible consistent on electric property, and maximum power point current error fluctuation range is the smaller the better, at least within 0.2A, these two-sided absorption cell metallization version types are also different according to battery types different designs, and compact battery sheet minor face width is consistent.
Being connected mutually by multiple compact battery sheets after cutting in step of the present invention (2), described battery strings is serially connected after being cut by same kind cell piece and is formed, or described battery strings is serially connected by two or more type cell sheets and is formed.
Preferred technical scheme as the one of which of the present invention, solar battery sheet described in step of the present invention (1) is p-type two-sided absorption solaode or the two-sided absorption solaode of n-type, and its positive pole and negative pole are separately positioned on described p-type two-sided absorption solaode or the tow sides of the two-sided absorption solaode of n-type.
A kind of preferred embodiment as technique scheme, the front and back of described p-type two-sided absorption solaode or the two-sided absorption solaode of n-type is respectively equipped with main grid, solar battery sheet is being carried out the cutting multiple compact battery sheets of formation near main grid reserved location place, described main grid is distributed on compact battery length of a film limit, and it is perpendicular with the minor face of described compact battery sheet, when compact battery sheet after cutting is connected mutually by step (2), the lamination process that is connected by between adjacent two compact battery sheets carries out, wherein the back side main grid of a piece of compact battery sheet is arranged in the front main grid of adjacent a piece of compact battery sheet, the main grid position that contacts with described front main grid in the described back side is provided with conductive material.
Another kind of preferred embodiment as technique scheme, the front and back of described p-type two-sided absorption solaode or the two-sided absorption solaode of n-type is not provided with main grid, it is divided into multiple compact battery sheet along the direction perpendicular with the thin grid of described p-type two-sided absorption solaode or n-type two-sided absorption solaode, described compact battery sheet is provided with the thin grid paralleled with its minor face, when compact battery sheet after cutting is connected mutually by step (2), the lamination process that is connected by between adjacent two compact battery sheets carries out, wherein the back side on a compact battery length of a film limit is arranged on the front, long limit of an adjacent compact battery sheet, the position that contacts with the front, long limit of an adjacent compact battery sheet, the back side on this compact battery length of a film limit is provided with two-sided conductive material.
Preferred technical scheme as the one of which of the present invention, solar battery sheet described in step (1) is p-type two-sided absorption solaode and the two-sided absorption solaode of n-type, after respectively two-sided to two-sided for p-type absorption solaode and n-type absorption solaode being cut, when compact battery sheet after cutting is connected mutually by step (2), when the substrate of adjacent two compact battery sheets is identical, wherein a compact battery sheet has front surface emitter stage, an adjacent solar battery sheet has back side emitter pole, when the substrate type difference of adjacent two compact battery sheets, adjacent two compact battery sheets have identical front surface emitter stage and identical back side emitter pole, connecting between adjacent two compact battery sheets is front and the front of cell piece, the back side adopts conductive material to be connected with the back side.
So design, it is possible to without layer-built battery sheet, but directly the front of two adjacent solaodes is connected with the back side with front, the back side, so can be effectively improved speed and the efficiency of production, the fragment rate in module production process can be reduced again.
Preferred technical scheme as the one of which of the present invention, solar battery sheet described in step (1) is back contact solar cell sheet, its positive pole and negative pole are all distributed in the back side of solar battery sheet, and its front electrode and backplate refer to hand over shape structure distribution in many groups overleaf, after solar battery sheet is cut, each compact battery sheet all there is least one set refer to hand over shape structure, and positive pole and negative pole are separately positioned on two long limits of described compact battery sheet, when compact battery sheet after cutting is connected mutually by step (2), the positive pole of a piece of compact battery sheet adopts conductive material to connect with the negative pole of adjacent a piece of compact battery sheet.
Owing to positive pole and the negative pole of back contact battery is all at cell backside, all of being electrically connected also is in battery back, battery front side illumination will not be produced impact, mode in parallel again of simultaneously connecting after this section can greatly reduce electric current power attenuation in interconnecting strip, thus promoting component power.
In above-mentioned preferred technical scheme: described conductive material is preferably one or more in metal welding, conductive tape, conducting resinl, conductive adhesive film, electrocondution slurry and soldering paste.It can also be two-sided connection that described conductive material can connect for one side according to connected mode difference.
Its width of conductive material connected for battery sensitive surface (front or front surface) is preferably basically identical with battery main gate line width, and width is approximately 0.5～1.5 times of main grid width.Its shape of conductive material connected for battery shady face can freely design.
According to cell metallization version type in step of the present invention (1), it is preferable that every solar battery sheet to be cut into 2～8 compact battery sheets；In step (2), multiple battery strings adopt serial or parallel connection mode to be connected with each other again.
In order to reduce welding resistance and coupling general components specification in assembly further, it is preferred that take between cell piece to be connected in series, be connected in parallel between battery strings.
Step of the present invention (3) dorsulum material can be lighttight common backboard, it is also possible to for the glass material of transparent two sides.
In step of the present invention (3), EVA/POE is ethylene-vinyl acetate copolymer/ethylene-octene copolymer.
After step (3) has interconnected between battery strings, carry out assembly typesetting lamination and lamination, its step is as follows: according to order from top to bottom, cover plate materials, EVA and/or POE, solaode string group that interconnection is good, EVA and/or POE, back veneer material are laid, lamination carries out layer after completing before, EL tests, and test reaches prescription and can be sent to laminating machine by component lamination.
Laying complete after through including EL test, lamination postprocessing working procedures processes particularly as follows: lamination carries out EL test before layer after completing, test reaches prescription and can be sent to laminating machine by component lamination, backboard and EVA and/or the POE material of glass edge residual is eliminated after laminate cooling, again carry out EL test, reach prescription and can complete to frame up and rosette connection work.
Second purpose of the present invention is to be achieved through the following technical solutions: adopt the double-sided solar battery that the manufacture method of above-mentioned double-sided solar battery assembly is made.
Compared with general components manufacture method, the invention have the advantages that
(1) the inventive method is by designing different double-side cell structures, cell piece is cut, first connect after cutting again (preferably) in parallel, the structure that connection in series-parallel is closed can better reduce component internal loss, and what be connected in parallel in assembly increases so that assembly heat resistanceheat resistant speckle ability is strengthened simultaneously；The method makes assembly by the double-side cell of different structure of arranging in pairs or groups so that the interconnection process between battery is simplified, thus reducing the fragment rate of solar battery sheet, promotes assembly yields；
(2) the inventive method is by optimizing interconnection mode between battery, assembly welding can be reduced and make consumption, comparing general components, the consumption that makes of welding in establishment of component process can substantially be reduced even without interconnection welding by the inventive method, thus effectively reducing establishment of component cost.
Accompanying drawing explanation
Fig. 1 is schematic diagram before and after p-type in embodiment 1, the cutting of n-type double-side cell, wherein (a): before the cutting of n-type double-side cell, and (b): after the cutting of n-type double-side cell, (c): before the cutting of p-type double-side cell, (d)；After the cutting of p-type double-side cell；
Fig. 2 is different cell piece alternate interconnection typesetting fragmentary views in embodiment 1, wherein (a): battery strings front plan view, and (b): battery strings side view；
Fig. 3 is cell piece typesetting connection diagram in assembly in embodiment 1；
Fig. 4 is front and the structure schematic diagram of IBC battery in embodiment 2, wherein (a): IBC battery front side, and (b): IBC cell backside；
Fig. 5 is IBC battery strings junction fragment schematic diagram in embodiment 2；
Fig. 6 is the front and back electrode schematic diagram of n-type double-side cell in embodiment 3, wherein (a): n-type double-side cell front, and (b): the n-type double-side cell back side；
Fig. 7 be in embodiment 3 n-type double-side cell cutting after front and back battery structure schematic diagram；
Fig. 8 is the junction fragment schematic diagram of laminated batteries string in embodiment 3；
Fig. 9 is that in embodiment 4, two pieces of dereliction grid cell sheets are overlapped mutually schematic diagram；
Wherein 1 is n-type battery front side anelectrode, and 2 is p-type battery front side negative electrode, and 3 is front side interconnection bar, 4 is back side interconnector, 5 is IBC battery cathode metal grid lines, and 6 is IBC anode metal grid lines, and 7 is that cell piece center preset clearance is for cell piece cutting, 8 is metal welding, 9 is n-type battery front side main grid, and 10 is n-type cell backside main grid, and 11 is reserved battery cutting gap, 12 is the dereliction grid cell after cutting, and 13 is two-sided conductive tape.
Detailed description of the invention
Embodiment 1
The present embodiment adopts p-type double-side cell and n-type double-side cell to combine and makes assembly, the emitter stage of two kinds of batteries is all disposed within the front (plane of illumination) of battery, therefore the front of n-type battery is the positive pole of battery, the front of p-type battery is the negative pole of battery, between front and the front of adjacent two cell pieces, utilize tradition welding to be interconnected between the back side and the back side, specifically comprise the following steps that
(1) selecting target battery sheet: elected as p-type double-side cell and n-type double-side cell, ensure that two kinds of batteries maximum power point electric current when front lighting shines is as far as possible consistent during battery sorting, current difference does not exceed 0.15 ampere；
(2) cutting solaode: by two kinds of each Self cleavage of dissimilar cell piece, it is divided into 6 compact battery sheets, in accompanying drawing 1, (a)-(d) is the schematic diagram before and after two kinds of cell piece cuttings, cell piece after cutting is alternately arranged good according to p-type, n-type cell piece, the number of arrangement can need flexible according to assembly version type, the front plan view of (a) and (b) respectively cell piece interconnection typesetting fragment and side view in Fig. 2；
(3) front welding solaode: adopting bonding machine to be welded on the front anelectrode 1 of n-type battery and the front negative electrode 2 of adjacent p-type battery by front side interconnection bar 3 according to intervening sequences, front side interconnection bar is tin plating copper strips；
(4) back side welding solaode: adopt bonding machine to be welded to by back side interconnector 4 on the back positive electrode of solaode and the back side negative electrode of adjacent cell, back side interconnector 4 is arranged in the solaode neutral place not welding front side interconnection bar, and interconnector is tin plating copper strips；
(5) assembly typesetting lamination and lamination: in accordance with the order from top to bottom, cover plate materials, EVA and/or POE, solaode string that welding is good, EVA and/or POE, back veneer material are laid, wherein the laying of battery strings is according to assembly version type needs, every 60 compact battery sheets are first alternately connected in series, the battery strings formed is connected in parallel each other again, Fig. 3 is cell piece typesetting connection diagram in assembly, lamination carries out layer after completing before, EL tests, and test reaches prescription and can be sent to laminating machine by component lamination；
(6) eliminate backboard and EVA and/or the POE material of glass edge residual after laminate cooling, carry out EL test, reach prescription and can complete to frame up and rosette connection work, prepare double-sided solar battery assembly.
Embodiment 2
The present embodiment adopts full back contacts IBC battery to make assembly, full back contact battery front does not have any metal grid lines to arrange, all contacts are in the cell piece back side, the present embodiment is provided with two groups at cell backside and refers to hand over shape metal structure, in Fig. 4, the front of (a) and (b) respectively IBC battery and structure schematic diagram, specifically comprise the following steps that
(1) selecting target battery sheet: elected as IBC battery, ensure that two kinds of batteries maximum power point electric current when front lighting shines is as far as possible consistent during battery sorting, current difference does not exceed 0.1 ampere；
(2) cutting solaode: cell piece being reserved from center cutting gap 7 and cuts, battery is divided into two parts, every part all contains the finger friendship shape metal structure that one group of both positive and negative polarity intersects；
(3) battery strings connects: be arranged in order by the cell piece cut, make adjacent cell sheet two ends metal electrode polarity different, use metal welding 8 and conducting resinl to combine positive pole and the negative pole of adjacent two panels cell piece to be coupled together, as the negative metal grid line 5 of a piece of cell piece is attached with the cathode metal grid line 6 of adjacent cell sheet, so being alternatively formed battery strings, Fig. 5 is IBC battery strings junction fragment schematic diagram；
(4) assembly typesetting lamination and lamination: in accordance with the order from top to bottom, cover plate materials, EVA and/or POE, solaode string that interconnection is good, EVA and/or POE, back veneer material are laid, wherein the laying of battery strings is according to assembly version type needs, compact battery sheet is first connected in series, and the battery strings of formation is connected in series again.Lamination carries out layer after completing before, EL tests, and test reaches prescription and can be sent to laminating machine by component lamination；
(5) eliminate backboard and EVA and/or the POE material of glass edge residual after laminate cooling, carry out EL test, reach prescription and can complete to frame up and rosette connection work, prepare double-sided solar battery assembly.
Embodiment 3
The present embodiment adopts n-type double-side cell to make assembly, the positive pole of cell piece and negative pole are distributed in the tow sides of cell piece, the front of cell piece and the back side respectively arrange 4 main grids, the front main grid 9 of n-type battery not in the upper and lower same position of cell piece with the back side main grid 10 of n-type battery but is 180 ° along cell piece central horizontal direction and is symmetrical arranged, the front and back electrode schematic diagram of (a) and (b) respectively n-type double-side cell in 6 in figure, concrete establishment of component step is as follows:
(1) selecting target battery sheet: elected as n-type double-side cell, ensure that two kinds of batteries maximum power point electric current when front lighting shines is as far as possible consistent during battery sorting, current difference does not exceed 0.15 ampere；
(2) cutting solaode: cell piece cutting is divided into 4 baby batteries along reserved cutting gap 11, after cutting, battery front side main grid and back side main grid are distributed in the two ends of minor face, parallel with long limit symmetrical in centrage, Fig. 7 is front and back battery structure schematic diagram after cell piece cutting；
(3) battery strings connects: cell piece concatenation adopts lamination process to carry out, the back side main grid 10 of a piece of n-type cell piece is covered in the front main grid 9 of another sheet n-type cell piece, electrocondution slurry is used to be attached between electrode, connection procedure applies a small amount of pressure and makes together with electrode adhesion with heat, the superposition so repeatedly of multiple cell pieces forms battery strings, and Fig. 8 is the junction fragment schematic diagram of laminated batteries string；
(4) assembly typesetting lamination and lamination: in accordance with the order from top to bottom, cover plate materials, EVA and/or POE, solaode string that interconnection is good, EVA and/or POE, back veneer material are laid, wherein the laying of battery strings is according to assembly version type needs, compact battery sheet is first connected in series, the battery strings formed is connected in parallel each other again, lamination carries out layer after completing before, EL tests, and test reaches prescription and can be sent to laminating machine by component lamination；
(5) eliminate backboard and EVA and/or the POE material of glass edge residual after laminate cooling, carry out EL test, reach prescription and can complete to frame up and rosette connection work, prepare double-sided solar battery assembly.
Embodiment 4
The present embodiment adopts P type double-side cell to make assembly, and battery tow sides are both provided with passivating film, and the positive pole of cell piece and negative pole are distributed in the tow sides of cell piece and all do not have main grid to arrange, and front metal turns to silver grating line, and back metal turns to alum gate line.Concrete establishment of component step is as follows:
(1) target battery sheet is selected: elected as P type, without main grid double-side cell, ensures during battery sorting that two kinds of batteries maximum power point electric current when front lighting shines is as far as possible consistent, and current difference does not exceed 0.1 ampere；
(2) cutting solaode: along vertical thin grid bearing, cell piece cutting being divided into 8 baby batteries, after cutting, the thin grid line of battery is parallel with minor face；
(3) battery strings connects: cell piece concatenation adopts lamination process to carry out, first two-sided conductive tape 13 is pasted onto the front edge of a piece of dereliction grid cell sheet, paste along long limit, it is pasted onto on conductive tape by the back side of other a piece of cell piece to realize superposition and the conducting transmission of two panels cell piece again, conductive tape width is less than the 1/10 of battery minor face width, conductive tape is can't see from front after two panels cell piece superposition, Fig. 9 is that two pieces of dereliction grid cell sheets are overlapped mutually schematic diagram, and the superposition so repeatedly of multiple cell pieces forms battery strings；
(4) assembly typesetting lamination and lamination: in accordance with the order from top to bottom, cover plate materials, EVA and/or POE, solaode string that interconnection is good, EVA and/or POE, back veneer material are laid, wherein the laying of battery strings is according to assembly version type needs, compact battery sheet is first connected in series, the battery strings formed is connected in parallel each other again, lamination carries out layer after completing before, EL tests, and test reaches prescription and can be sent to laminating machine by component lamination；
(5) eliminate backboard and EVA and/or the POE material of glass edge residual after laminate cooling, carry out EL test, reach prescription and can complete to frame up and rosette connection work, prepare double-sided solar battery assembly.
A part of specific embodiment is enumerated above, and the present invention will be described, it is necessary to it is pointed out here that be that embodiments above is served only for that the invention will be further described, do not represent limiting the scope of the invention.Some nonessential amendments and adjustment that other people make according to the present invention still fall within protection scope of the present invention.
Claims (10)
1. a manufacture method for double-sided solar battery assembly, is characterized in that comprising the following steps:
(1) choose two-sided absorption solar battery sheet, solar battery sheet is cut into multiple compact battery sheet；
(2) the multiple compact battery sheets after cutting are connected mutually, form multiple battery strings, more multiple battery strings are connected, form battery strings group；
(3) according to order from top to bottom, cover plate materials, EVA and/or POE, battery strings group, EVA and/or POE, back veneer material are laid；
(4) through including EL test after having laid, lamination postprocessing working procedures processes, and namely prepares double-sided solar battery assembly；
Wherein the two-sided absorption solar battery sheet described in step (1) is p-type two-sided absorption solaode and/or the two-sided absorption solaode of n-type, or described two-sided absorption solar battery sheet is back contact solar cell sheet.
2. the manufacture method of double-sided solar battery assembly according to claim 1, it is characterized in that: the multiple compact battery sheets after cutting are connected mutually by step (2), described battery strings is serially connected after being cut by same kind cell piece and is formed, or described battery strings is serially connected by two or more type cell sheets and is formed.
3. the manufacture method of double-sided solar battery assembly according to claim 1, it is characterized in that: the solar battery sheet described in step (1) is p-type two-sided absorption solaode or the two-sided absorption solaode of n-type, and its positive pole and negative pole are separately positioned on described p-type two-sided absorption solaode or the tow sides of the two-sided absorption solaode of n-type.
4. the manufacture method of double-sided solar battery assembly according to claim 3, it is characterized in that: the front and back of described p-type two-sided absorption solaode or the two-sided absorption solaode of n-type is respectively equipped with main grid, solar battery sheet is being carried out the cutting multiple compact battery sheets of formation near main grid reserved location place, described main grid is distributed on the long limit of compact battery sheet, and it is perpendicular with the minor face of described compact battery sheet, when compact battery sheet after cutting is connected mutually by step (2), the lamination process that is connected by between adjacent two compact battery sheets carries out, wherein the back side main grid of a piece of compact battery sheet is arranged in the front main grid of adjacent a piece of compact battery sheet, the main grid position that contacts with described front main grid in the described back side is provided with conductive material.
5. the manufacture method of double-sided solar battery assembly according to claim 3, it is characterized in that: the front and back of described p-type two-sided absorption solaode or the two-sided absorption solaode of n-type is not provided with main grid, it is divided into multiple compact battery sheet along the direction perpendicular with the thin grid of described p-type two-sided absorption solaode or n-type two-sided absorption solaode, described compact battery sheet is provided with the thin grid paralleled with its minor face, when compact battery sheet after cutting is connected mutually by step (2), the lamination process that is connected by between adjacent two compact battery sheets carries out, wherein the back side on a compact battery length of a film limit is arranged on the front, long limit of an adjacent compact battery sheet, the position that contacts with the front, long limit of an adjacent compact battery sheet, the back side on this compact battery length of a film limit is provided with two-sided conductive material.
null6. the manufacture method of double-sided solar battery assembly according to claim 1，It is characterized in that: the solar battery sheet described in step (1) is p-type two-sided absorption solaode and the two-sided absorption solaode of n-type，After respectively two-sided to two-sided for p-type absorption solaode and n-type absorption solaode being cut，When compact battery sheet after cutting is connected mutually by step (2)，When the substrate of adjacent two compact battery sheets is identical，Wherein a compact battery sheet has front surface emitter stage，An adjacent solar battery sheet has back side emitter pole，When the substrate type difference of adjacent two compact battery sheets，Adjacent two compact battery sheets have identical front surface emitter stage and identical back side emitter pole，Connecting between adjacent two compact battery sheets is front and the front of cell piece、The back side adopts conductive material to be connected with the back side.
7. the manufacture method of double-sided solar battery assembly according to claim 1, it is characterized in that: the solar battery sheet described in step (1) is back contact solar cell sheet, its positive pole and negative pole are all distributed in the back side of solar battery sheet, and its front electrode and backplate refer to hand over shape structure distribution in many groups overleaf, after solar battery sheet is cut, each compact battery sheet all there is least one set refer to hand over shape structure, and positive pole and negative pole are separately positioned on two long limits of described compact battery sheet, when compact battery sheet after cutting is connected mutually by step (2), the positive pole of a piece of compact battery sheet adopts conductive material to connect with the negative pole of adjacent a piece of compact battery sheet.
8. the manufacture method of the double-sided solar battery assembly according to any one of claim 3-6, is characterized in that: described conductive material is one or more in metal welding, conductive tape, conducting resinl, conductive adhesive film, electrocondution slurry and soldering paste.
9. the manufacture method of the double-sided solar battery assembly according to any one of claim 1-7, is characterized in that: solar battery sheet cuts in step (1) 2～8 compact battery sheets；In step (2), multiple battery strings adopt serial or parallel connection mode to be connected with each other again.
10. adopt the double-sided solar battery that the manufacture method of the double-sided solar battery assembly described in any one of claim 1-7 is made.
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