CN101826575A - Method for laying photovoltaic module - Google Patents
Method for laying photovoltaic module Download PDFInfo
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- CN101826575A CN101826575A CN201010121549A CN201010121549A CN101826575A CN 101826575 A CN101826575 A CN 101826575A CN 201010121549 A CN201010121549 A CN 201010121549A CN 201010121549 A CN201010121549 A CN 201010121549A CN 101826575 A CN101826575 A CN 101826575A
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- Prior art keywords
- glass plate
- welding
- battery sheet
- eva
- laying method
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a method for laying a photovoltaic module. The method comprises the following steps of: a) evaporating and plating a solder strip and a bus bar on a glass plate in vacuum; b) welding a battery plate set to the solder strip and the bus bar by using laser to obtain the glass plate welded with the battery plates; c) laying an EVA plate on the battery plate set; and d) laying a back plate on the EVA plate to obtain the laid battery plate. By using the method for laying the photovoltaic module provided by the invention, the glass plate and the battery plate are integrated into a whole; the glass plate is bonded to the battery plate without needing EVA; the thickness of the photovoltaic module is reduced; moreover, the fragments of the battery plate can be detected by using infrared ray after laying and the fragments do not need detecting again after lamination and formation, so that fragmentation rate is reduced and the controllability of the quality of the photovoltaic module is increased.
Description
Technical field
The present invention relates to the photovoltaic module preparation field, be specifically related to a kind of laying method of photovoltaic module.
Background technology
Photovoltaic cell is that solar cell is a kind of device that directly luminous energy is changed into electric energy by photoelectric effect or Photochemical effects.With solar cell and the certain combination of other auxiliary material process, reach certain rated output power and one group of photovoltaic cell of output voltage, be photovoltaic module.According to photovoltaic plant size and scale, can form array of all sizes by photovoltaic module.The extensive application of photovoltaic cell has promoted the utilization and the exploitation of new forms of energy, has reduced the quantity of coal generating, has reduced carbon dioxide and sulfur dioxide isothermal chamber gas purging amount, thereby has saved non-renewable resources, protected environment.
The manufacturing of conventional photovoltaic assembly need be passed through following steps: at first the positive back side of battery sheet is welded into battery strings, subsequently battery strings is connected according to the order of glass plate, EVA, battery strings, EVA, backboard with the band that confluxes with glass plate, EVA, backboard and lays, obtain laying cell panel, again the described cell panel that lays is put into laminating machine, by vacuumizing the air in the assembly is extracted out, heating and pressurizing makes the EVA fusing that battery, glass and backboard are bonded together then, obtain photovoltaic module, utilize infrared test to have or not at last more latent to split, blackspot.
In the prior art among the preparation method of photovoltaic module, laying step is earlier the battery sheet to be welded into battery strings, again described battery strings and glass plate, backboard are bondd with EVA, this method can cause the thickness of photovoltaic module can not adjust and owing to can't detect and directly carry out lamination step semi-finished product in the laid processes of photovoltaic module, for latent the splitting of photovoltaic module and the fragment phenomenon that causes can't detect immediately, cause the optoelectronic transformation efficiency of photovoltaic module to descend, influenced end product quality.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of preparation method of photovoltaic module is provided, and effectively reduces the finished product fragment rate, reduces finished product thickness simultaneously.
In order to overcome the above problems, the invention provides a kind of laying method of photovoltaic module, comprising:
A) with welding with conflux the band vacuum evaporation on glass plate;
B) battery sheet group laser welding is with at described welding and described confluxing; Obtain being welded with the glass plate of battery sheet;
C) on described battery sheet group, lay the EVA plate;
D) on described EVA plate, lay backboard and obtain laying cell panel.
Preferably, step a) is specially: a1) glass plate, deposition material, welding and the band that confluxes are positioned in the vacuum evaporation cabinet, feed Steam Heating, steam temperature is 150 ℃～300 ℃, and the deposition material fusion is plated in the welding and the band that confluxes on the described glass plate.
Preferably, described deposition material is at least by a kind of composition the in silver, copper, tin, aluminium, the zinc.
Preferably, steam temperature is 160 ℃～240 ℃ step a1).
Preferably, step a1) during vacuum evaporation, the vacuum degree in the described vacuum evaporation cabinet is 1 * 10 in
-4Torr～5 * 10
-4Torr.
Preferably, described backboard is by any one preparation in the following material: TPT, TPE, BBF, EVA, toughened glass;
Described TPT is ethylene fluoride-Polyethyleneglycol Terephthalate block copolymer; Described TPE is a thermoplastic elastomer (TPE); Described BBF is EVA, PET and three layers of compound of THV, and described THV is tetrafluoroethene, hexafluoropropylene and the terpolymer of fluoridizing inferior ethene; Described EVA is an ethylene-vinyl acetate copolymer.
Preferably, comprise after the step d):
E) use the described cell panel that lays of infrared detection.
Preferably, in the described battery sheet group, the positive pole of adjacent two battery sheets is connected with negative pole.
Preferably, described glass plate light transmittance is greater than 98%.
The battery sheet group of preferably, welding in the step b) comprises that quantity is 2～100 battery sheet.
The invention provides a kind of laying method of photovoltaic module, comprise a) with welding with conflux band vacuum evaporation on glass plate; B) battery sheet group laser welding is with at described welding and described confluxing; Obtain being welded with the glass plate of battery sheet; C) on described battery sheet group, lay the EVA plate; D) on described EVA plate, lay backboard and obtain laying cell panel.The laying method of photovoltaic module provided by the invention, use the method for vacuum evaporation that the welding and the band that confluxes are deposited on the glass plate earlier, to arrange good battery sheet and described welding and the described tape welding that confluxes in advance in order with laser again connects, do like this glass plate and battery sheet in conjunction with as a whole, do not need to re-use EVA with described glass plate and described battery sheet bonding, reduced the thickness of photovoltaic module; Meanwhile, after laying, promptly can use infrared ray that the battery sheet is detected the sheet situation, not need to detect again after the lamination typing, reduce fragment rate, increase the controllability of photovoltaic module quality.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiments of the invention are described, but should be appreciated that just restriction of these descriptions for further specifying the features and advantages of the present invention rather than patent of the present invention being required.
The invention provides a kind of laying method of photovoltaic module, comprising:
A) with welding with conflux the band vacuum evaporation on glass plate;
B) battery sheet group laser welding is with at described welding and described confluxing; Obtain being welded with the glass plate of battery sheet;
C) on described battery sheet group, lay the EVA plate;
D) on described EVA plate, lay backboard and obtain laying cell panel.
The method of having used vacuum evaporation of laying of photovoltaic module provided by the invention is plated in the welding and the band that confluxes on the glass plate.Be preferably according to vacuum vapour deposition of the present invention:
Use the surface of alcohol cleaning panes, and with described glass plate dried for standby; Dried glass plate, deposition material, welding and the band that confluxes are positioned in the vacuum evaporation cabinet and use Steam Heating, and steam temperature is 150 ℃～300 ℃, uses deposition material that the welding and the band that confluxes are plated on the described glass plate; Take out the glass plate cooling back that obtains, stand-by.
The glass plate that the present invention uses is preferably light transmittance greater than 98% toughened glass, because high light transmittance can reduce glass to reflection of light, increases the optoelectronic transformation efficiency of battery sheet, improves the usefulness of overall optical photovoltaic assembly.Use these glass pane surface of cleaning such as alcohol, water, acetone, the present invention preferably uses alcohol, and is nontoxic because alcohol is volatile, do not influence the operating environment of factory floor.After cleaning was finished, preferably dry under 50 ℃～80 ℃, drying medium the present invention did not do qualification.
Dried glass plate is placed in the vacuum chamber of vacuum evaporation cabinet, at the vacuum chamber inwall a plurality of steam holes are arranged, steam hole is connected with storage tank, and heater is arranged around the storage tank.In vacuum chamber, regulate the device of vacuum degree in addition.On glass plate, need the evaporation welding and the position of the band that confluxes to place deposition material, the present invention does not limit deposition material, preferred deposition material well known in the art: silver, copper, tin, aluminium, zinc or the alloy that uses above-mentioned metal to form arbitrarily, the preferred tin of the present invention, because tin has low melting point, the characteristics of good fluidity after the fusion can make evaporation more even.Again the welding and the band that confluxes are placed on the assigned address of the glass plate of telling.Then glass plate is put into vacuum chamber, vacuum degree is preferably 1 * 10
-4Torr～5 * 10
-4Torr, more preferably 2 * 10
-4Torr～4 * 10
-4Torr; Start heater, steam temperature is preferably 150 ℃～300 ℃, more preferably 160 ℃～240 ℃.Slowly cooling after the complete fusion of tin, welding illustrates the evaporation success after being deposited on the glass plate with the band that confluxes.Control vacuum degree and steam temperature during this within the limits prescribed, otherwise it is inhomogeneous to produce deposition material, the phenomenon of local stress surplus, product quality can not get guaranteeing.It is standby that cooled glass plate is taken out vacuum chamber.
According to the present invention, unnecessary deposition material on the glass plate of the evaporation welding and the band that confluxes is removed the clean surface.Again the battery sheet is stacked in order above-mentioned glass plate evaporation welding and the one side of the band that confluxes.The positive pole of preferred adjacent two the battery sheets of described order is connected with negative pole, and the like.The quantity of placing the battery sheet is preferably 2～100, more preferably 10～50, most preferably is 20～40.It is unqualified whether the present invention welds in advance for the battery sheet, is preferably not welding in advance, the battery sheet piled up the unification of neat back in order weld.
The present invention uses method for laser welding that battery sheet and glass plate are welded by being deposited on the welding on the glass plate in advance and confluxing to be with.Because photovoltaic module belongs to precision components, and the principle of laser welding maximum is to utilize high-octane laser pulse that material is carried out localized heating in the tiny area, the energy of laser emission will form specific molten bath by the diffusion inside of heat conduction to material after the material melts.Advantage is the depth-to-width ratio height, and weld width is little, and the heat affected area is little, distortion is little, and speed of welding is fast, smooth welded seam, attractive in appearance, postwelding need not to handle or only need simple process, weldquality height, pore-free, can accurately control, focal spot is little, and the positioning accuracy height is easily realized automation.So utilize laser welding can well reduce the fragment phenomenon of using traditional welding method to cause.
Obtain being welded with the glass plate of battery sheet after laser welding is finished, itself and EVA, backboard are laid.What is called is laid exactly and will be spliced or be stacked together according to the order of the glass plate that is welded with the battery sheet, EVA, backboard.The EVA that the present invention uses is preferably the PUR that uses ethene and vinyl acetate copolymerization at high temperature to obtain, and its superior performance viscosity is big, is difficult for aging.And the present invention does not do qualification to the material of backboard, the compound BBF that selects for use ethylene fluoride well known in the art-Polyethyleneglycol Terephthalate block copolymer TPT, thermoplastic elastomer (TPE) TPE, EVA+PET+THV to make.General employing is three-layer co-extruded.The THV resin is tetrafluoroethene, hexafluoropropylene and terpolymer, EVA, the toughened glass of fluoridizing inferior ethene.The preferred toughened glass of the present invention, use toughened glass to replace TPT etc. as backboard and battery sheet carrier---the identical spending that can reduce cost of material of glass plate, and also use toughened glass can 2 daylightings as backboard, have increased light utilization efficiency.
According to the present invention, after the laser welding, getting 10 points on the battery sheet uses infrared ray to detect fragment rate, the result shows that fragment rate is less than 0.5%, and the fragment rate that uses traditional laying method to obtain photovoltaic module is less than 5%, illustrates that vacuum evaporation and laser welding technology greatly reduce fragment rate.Carry out infrared detection once more after finishing laying, the average fragment rate of result is still less than 0.5%.
Lay and obtain laying cell panel after finishing, again the above-mentioned cell panel that lays is sent into laminating machine, heating makes the EVA fusion when vacuumizing, and will bond between glass plate and the backboard, cool off EVA slowly and solidify, carry out a series of wiring work again and just obtained photovoltaic module.
The cell panel that lays that utilizes the laying method of photovoltaic module provided by the invention to obtain for further proof carries out lamination again, the photovoltaic module that the photovoltaic module product fragment rate that obtains still prepares less than conventional method, be 1% with its fragment rate of infrared detection once more, such result can prove absolutely, that uses that the fragment rate that lays cell panel or even final photovoltaic module of the laying method preparation of photovoltaic module provided by the invention all is far smaller than the conventional method preparation lays cell panel and final products.
The laying method of photovoltaic module provided by the invention, use the method for vacuum evaporation that the welding and the band that confluxes are deposited on the glass plate earlier, to arrange good battery sheet and described welding and the described tape welding that confluxes in advance in order with laser again connects, do like this glass plate and battery sheet in conjunction with as a whole, do not need to re-use EVA with described glass plate and described battery sheet bonding, reduced the thickness of photovoltaic module; Meanwhile, in laid processes, can use infrared ray that the battery sheet is detected fragment sheet situation, not need to detect again after the lamination typing, reduce fragment rate, increase the controllability of photovoltaic module quality.
In order better to set forth the solution of the present invention, present invention is described next to use specific embodiment.
Embodiment
1, glass plate preliminary treatment
Get light transmittance greater than 98%, specification is the toughened glass of 1m * 0.5m, and the present invention preferably uses alcohol plot toughened glass surface.After cleaning is finished, dry down at 60 ℃.
2, vacuum evaporation
Dried glass plate is placed in the vacuum chamber of vacuum evaporation cabinet, pure tin, welding and the band that confluxes are placed on the assigned address of described glass plate.The vacuum degree of regulating in the vacuum chamber is 3 * 10
-4Torr opens and vacuumizes valve, and the air in the vacuum chamber is discharged; Start heater, the water in the heating storage tank, water evaporation back steam enters vacuum chamber by steam port, and steam temperature is 210 ℃.Slowly cooling after the complete fusion of tin, welding is fixed on the glass plate with the band that confluxes
3, laser welding
Unnecessary tin on the glass plate of the evaporation welding and the band that confluxes is removed the clean surface.Again the battery sheet is stacked in order one side with the above-mentioned glass plate evaporation welding and the band that confluxes.Described order is the one side that the positive pole of first battery sheet overlays glass plate evaporation welding, and the positive pole of second battery sheet overlays on the negative pole of first battery sheet, remaining and the like.The quantity of placing the battery sheet is preferably 36, and the glass plate that stacks the battery sheet is put into laser-beam welding machine, and the power of regulating laser is that 200W, pulsed laser energy are 110J, and start is welded according to the track of the welding and the band that confluxes.
4, lay
Obtain being welded with the glass plate of battery sheet after laser welding is finished, with itself and EVA, the toughened glass of clean surface is stacked together according to said sequence in advance, finishes and lay.
5, detect
After the laser welding, get 10 points on the battery sheet of top layer, use wavelength to detect as the infrared ray of 750nm, utilize formula: battery sheet/total battery sheet quantity * 100% of fragment is arranged, calculate fragment rate, the result shows that fragment rate is 0.1%.Lay and detect after the same method after finishing, the result is 0.2%.
More than the laying method of a kind of photovoltaic module provided by the invention is described in detail.Used specific embodiment herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection range of claim of the present invention.
Claims (10)
1. the laying method of a photovoltaic module is characterized in that, comprising:
A) with welding with conflux the band vacuum evaporation on glass plate;
B) battery sheet group laser welding is with at described welding and described confluxing; Obtain being welded with the glass plate of battery sheet;
C) on described battery sheet group, lay the EVA plate;
D) on described EVA plate, lay backboard and obtain laying cell panel.
2. laying method according to claim 1 is characterized in that step a) is specially: a1) glass plate, deposition material, welding and the band that confluxes are positioned in the vacuum evaporation cabinet; Feed Steam Heating, steam temperature is 150 ℃～300 ℃, and the deposition material fusion is plated in the welding and the band that confluxes on the described glass plate.
3. laying method according to claim 2 is characterized in that, described deposition material is at least by a kind of composition the in silver, copper, tin, aluminium, the zinc.
4. laying method according to claim 2 is characterized in that step a1) in steam temperature be 160 ℃～240 ℃.
5. laying method according to claim 2 is characterized in that step a1) in during vacuum evaporation, the vacuum degree in the described vacuum evaporation cabinet is 1 * 10
-4Torr～5 * 10
-4Torr.
6. laying method according to claim 1 is characterized in that, described backboard is by any one preparation in the following material: TPT, TPE, BBF, EVA, toughened glass;
Described TPT is ethylene fluoride-Polyethyleneglycol Terephthalate block copolymer; Described TPE is a thermoplastic elastomer (TPE); Described BBF is EVA, PET and three layers of compound of THV, and described THV is tetrafluoroethene, hexafluoropropylene and the terpolymer of fluoridizing inferior ethene; Described EVA is an ethylene-vinyl acetate copolymer.
7. laying method according to claim 1 is characterized in that, comprises after the step d):
E) use the described cell panel that lays of infrared detection.
8. laying method according to claim 1 is characterized in that, in the described battery sheet group, the positive pole of adjacent two battery sheets is connected with negative pole.
9. laying method according to claim 1 is characterized in that, described glass plate light transmittance is greater than 98%.
10. laying method according to claim 1 is characterized in that, the battery sheet group of welding in the step b) comprises that quantity is 2～100 battery sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101215498A CN101826575B (en) | 2010-02-20 | 2010-02-20 | Method for laying photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101215498A CN101826575B (en) | 2010-02-20 | 2010-02-20 | Method for laying photovoltaic module |
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| Publication Number | Publication Date |
|---|---|
| CN101826575A true CN101826575A (en) | 2010-09-08 |
| CN101826575B CN101826575B (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101215498A Expired - Fee Related CN101826575B (en) | 2010-02-20 | 2010-02-20 | Method for laying photovoltaic module |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259218A (en) * | 2011-07-06 | 2011-11-30 | 哈尔滨工业大学 | Vacuum activating welding device |
| CN102501552A (en) * | 2011-12-23 | 2012-06-20 | 常州天华新能源科技有限公司 | Intelligent laying production equipment for crystalline silicon solar laminated plates |
| CN102569520A (en) * | 2012-01-20 | 2012-07-11 | 英利能源（中国）有限公司 | Solar cell, packaging method of solar cell, and unmanned aerial vehicle employing solar cell |
| CN102610688A (en) * | 2011-01-19 | 2012-07-25 | 中电电气(上海)太阳能科技有限公司 | Tool for encapsulating and arranging string of solar cell component |
| CN103258910A (en) * | 2013-05-03 | 2013-08-21 | 天津英利新能源有限公司 | Method achieving automated statistics of fragment rate |
| CN105702750A (en) * | 2014-11-28 | 2016-06-22 | 润峰电力有限公司 | Laser cladding welding method for full-aluminum back field solar cell back pole |
| CN113039036A (en) * | 2018-10-30 | 2021-06-25 | 浜松光子学株式会社 | Laser processing apparatus |
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2010
- 2010-02-20 CN CN2010101215498A patent/CN101826575B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610688A (en) * | 2011-01-19 | 2012-07-25 | 中电电气(上海)太阳能科技有限公司 | Tool for encapsulating and arranging string of solar cell component |
| CN102259218A (en) * | 2011-07-06 | 2011-11-30 | 哈尔滨工业大学 | Vacuum activating welding device |
| CN102259218B (en) * | 2011-07-06 | 2012-12-19 | 哈尔滨工业大学 | Vacuum activating welding device |
| CN102501552A (en) * | 2011-12-23 | 2012-06-20 | 常州天华新能源科技有限公司 | Intelligent laying production equipment for crystalline silicon solar laminated plates |
| CN102501552B (en) * | 2011-12-23 | 2014-12-10 | 常州天华新能源科技有限公司 | Intelligent laying production equipment for crystalline silicon solar laminated plates |
| CN102569520A (en) * | 2012-01-20 | 2012-07-11 | 英利能源（中国）有限公司 | Solar cell, packaging method of solar cell, and unmanned aerial vehicle employing solar cell |
| CN102569520B (en) * | 2012-01-20 | 2014-12-17 | 英利能源（中国）有限公司 | Solar cell, packaging method of solar cell, and unmanned aerial vehicle employing solar cell |
| CN103258910A (en) * | 2013-05-03 | 2013-08-21 | 天津英利新能源有限公司 | Method achieving automated statistics of fragment rate |
| CN103258910B (en) * | 2013-05-03 | 2015-09-30 | 天津英利新能源有限公司 | A kind of method realizing fragment rate automation statistics |
| CN105702750A (en) * | 2014-11-28 | 2016-06-22 | 润峰电力有限公司 | Laser cladding welding method for full-aluminum back field solar cell back pole |
| CN113039036A (en) * | 2018-10-30 | 2021-06-25 | 浜松光子学株式会社 | Laser processing apparatus |
| CN113039036B (en) * | 2018-10-30 | 2023-08-29 | 浜松光子学株式会社 | Laser processing device |
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