CN102254978A - Tin-lead welding strip for solar photovoltaic assembly and manufacturing method thereof - Google Patents
Tin-lead welding strip for solar photovoltaic assembly and manufacturing method thereof Download PDFInfo
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- CN102254978A CN102254978A CN201110235081XA CN201110235081A CN102254978A CN 102254978 A CN102254978 A CN 102254978A CN 201110235081X A CN201110235081X A CN 201110235081XA CN 201110235081 A CN201110235081 A CN 201110235081A CN 102254978 A CN102254978 A CN 102254978A
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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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- 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
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Abstract
The invention discloses a tin-lead welding strip for a solar photovoltaic assembly, which comprises a copper strip base material, wherein a compact tin-lead alloy layer with a thickness of 3-20 micrometers covers the surface of the copper strip base material. A manufacturing method of the tin-lead welding strip for the solar photovoltaic assembly comprises the step of: covering the compact tin-lead alloy layer on the copper strip base material by adopting an electroplating method, wherein the thickness of the tin-lead alloy layer is 3-20 micrometers. Because the electroplating method is adopted, a cladding material has a crystal lattice characteristic and capacities of enhancing adhesive force of the welding strip and improving the conductivity of the photovoltaic welding strip. The welding strip has a volume resistivity of 0.0185-0.021omega mm<2>/m which is lower than that of the welding strip manufactured through thermal tin immersion and a melting point of 183-190 DEG C lower than that of a lead-free welding strip, and has no abnormal phenomena such as tin knobs, tin dross, copper cuttings, discoloration and the like. A process capability index (CPK) value is effectively increased.
Description
Technical field
The present invention relates to a kind of electric material, relate in particular to a kind of tin lead welding band and manufacture method thereof that is used for solar photovoltaic assembly.
Background technology
Since 21st century, for the love to environment, the utilization of solar energy becomes one of human focus of creating new forms of energy.Solar photovoltaic assembly has used the Si sheet of a large amount of polycrystalline and monocrystalline, and these Si sheets need be communicated with by welding (band is with/is confluxed in interconnection) welding, are transferred to designated field, by this pattern generating, transmits electric power.Along with the fast development of solar photovoltaic assembly, just need be used for the welding of solar photovoltaic assembly in a large number.
Up to now, people are in order to obtain high conductivity, and the welding that connects solar photovoltaic assembly all adopts higher oxygen-free copper of purity or high-purity copper (99.9999%) as conductor material, and manufacturing cost will be very high like this.
Publication number is the utility model patent of CN201430144; disclose a kind of solar cell and be coated with the tin band; comprise the copper strips base material; the copper strips base material simultaneously is coated with the ashbury metal layer; another side is coated with the protective layer homochromy with solar battery sheet, and protective layer is pigment coated or is the ashbury metal coating of mixing additives of pigments.
Publication number be CN101488536 patent disclosure the conflux method of the band and the band assembling solar plate that confluxes of a kind of solar photovoltaic assembly, its conflux with on the tin layer cover and adopt tinning technology.
Prior art generally all is to adopt tinning technology that tin solder is covered to copper strips.The tin thickness of this method manufacturing is inhomogeneous, phenomenons such as list edge, scruff, copper scale and variable color are arranged, and often produces pin hole and stream tin during welding, and solderability is bad.
The large-scale popularization of solar photovoltaic assembly is used the problem that needs to solve two aspects, the production cost that aspect is the Si sheet will descend, and another aspect is that the production cost of each parts such as welding is cheap, and production technology is controlled, production process is wanted high-speeding, the adhesive force of welding and Si sheet will be got well, and solderability will be got well, and fusing point is low, the plate surface of what is more important welding is smooth, solderability will be got well, and it is high that conductivity is wanted, and electric conductivity will be got well.And prior art adopts tinning technology that tin solder is covered the method for producing welding to the copper strips not satisfy last requirement.
Summary of the invention
Purpose of the present invention in order to solve the problem that above-mentioned prior art exists, provides a kind of tin lead welding band and manufacture method thereof that is used for solar photovoltaic assembly exactly.
In order to achieve the above object, the present invention has adopted following technical scheme: a kind of tin lead welding band that is used for solar photovoltaic assembly, comprise the copper strips base material, and described copper strips substrate surface is coated with the leypewter layer of one deck densification, and thickness is 3～20 microns.
Tin with the percentage by weight of lead is in the described ashbury metal layer: tin 60～90%, plumbous 10～40%.General tin and lead proportion are: the composition ratio is for having 60/40,65/35,63/37,70/30,80/20,90/20.
Described copper strips base material is oxygen-free copper stripe or copper belt.
The above-mentioned manufacture method that is used for the tin lead welding band of solar photovoltaic assembly is to adopt electro-plating method to cover the leypewter layer of one deck densification on the copper strips base material, and the thickness of leypewter layer is 3～20 microns.
The key step of described electro-plating method is, the copper strips base material is after heat treatment electroplated by the electroplate liquid that contains Sn, Pb, and copper strips base material translational speed is controlled at 3-20m/min, and electroplate liquid pH value is controlled at 1～2, temperature of electroplating solution is controlled at 10～30 ℃, and current density is controlled at 10～50A/dm
2, electroplating time was controlled at 60～120 seconds, and thickness of coating is controlled at 3～20 microns.
In the described electroplate liquid, the adding form of Sn is stannous sulfate or tin methane sulfonate, and the adding form of Pb is lead sulfate or pyrovinic acid lead, and the molar concentration rate of Sn and Pb is controlled at 30: 8～20.
The present invention has following advantage and characteristics owing to adopted above technical scheme:
1, owing to adopt the plumbous electro-plating method of tin, coating has patterned features, can strengthen the adhesive force of welding, effectively improves the conductance 2-4% of photovoltaic welding belt.
2, adopt electro-plating method to make tin lead welding band, produce fast, the SnPb alloy layer thickness is controlled 3～20 microns on the copper strips.Welding processing controllable width reaches 1.1～20 millimeters.
3, adopting the welding specific insulation of galvanoplastic manufacturing is 0.0185～0.021 Ω mm
2/ m, the specific insulation of the welding of making than tinning is low.
4, the welding fusing point that adopts the plumbous electro-plating method of tin to make is low, and controlled, and melting range is the 183-190 degree.
Description of drawings
Fig. 1 is the section structure schematic diagram of product electrotinning lead welding band of the present invention;
Fig. 2 is the section structure schematic diagram of prior art tinning welding.
Specific embodiments
The present invention is used for the tin lead welding band of solar photovoltaic assembly, comprises the copper strips base material, is coated with the leypewter layer of one deck densification at the copper strips substrate surface, and thickness is 3～20 microns.Tin with the percentage by weight of lead is in the leypewter layer: tin 60～90%, plumbous 10～40%.The copper strips base material is oxygen-free copper stripe or copper belt.
The present invention is used for the manufacture method of the tin lead welding band of solar photovoltaic assembly, is to adopt electro-plating method to cover the leypewter layer of one deck densification on the copper strips base material.Concrete steps are as follows:
A, electrolytic degreasing: plating piece is placed the alkaline solution electrolysis, remove the grease and the flash on plating piece surface;
B, activation: place acid solution to activate plating piece, remove the oxide on plating piece surface;
C, preimpregnation: plating piece is placed acid sulfonate solution preimpregnation, plating piece is formed etching;
D, the plumbous plating of tin: adopt delivery wheel transmission plating piece, allow plating piece electroplate through electroplate liquid, transmission speed is controlled at 6～18 meters/minute, and current density is controlled at 10～30 amperes/square decimeter, temperature of electroplating solution is controlled at 15～35 ℃, and electroplating time was controlled at 30～90 seconds; Pyrovinic acid system, sulfuric acid system or the mixed acid system of consisting of of electroplate liquid: Sn and Pb, wherein the molar concentration rate of Sn and Pb is controlled at 30: 8～20.
E, neutralization: the plating piece after will electroplating places sodium radio-phosphate,P-32 solution to handle, and the organic acid on surface is cleaned up;
F, tin protection: place tin protection solution to handle plating piece, form one deck organic membrane on the plating piece surface;
G, ultrasonic wave pure water are washed: plating piece is placed the pure water ultrasonic Treatment, to remove the impurity in the coating space.
Below be the embodiment that the manufacture method that adopts the present invention to be used for the tin lead welding band of solar photovoltaic assembly is produced welding.
Embodiment 1
The copper strips base material adopts commercially available copper belt, the copper strips base material is implemented heat treatment, 400 ℃ of following heat treatments 90 minutes.
To electroplate by the electroplate liquid that contains Sn, Pb through heat treated copper belt, the molar concentration rate of Sn and Pb was controlled at 30: 10; Copper strips base material translational speed is controlled at 10m/min, and electroplate liquid pH value is controlled to be 1, and temperature of electroplating solution is controlled to be 20 ℃, and current density is controlled at 30A/dm
2, electroplating time was controlled at 2 minutes, and thickness of coating is controlled at 10 microns.Obtain tin in the coating and plumbous percentage by weight and be 63: 37 welding.
Embodiment 2
The copper strips base material adopts commercially available copper belt, the copper strips base material is implemented heat treatment, 750 ℃ of following heat treatments 30 minutes.
To electroplate by the electroplate liquid that contains Sn, Pb through heat treated oxygen-free copper stripe, the molar concentration rate of Sn and Pb was controlled at 30: 20; Copper strips base material translational speed is controlled at 15m/min, and electroplate liquid pH value is controlled to be 2, and temperature of electroplating solution is controlled to be 25 ℃, and current density is controlled at 40A/dm
2, electroplating time was controlled at 1 minute, and thickness of coating is controlled at 15 microns.Obtain tin in the coating and plumbous percentage by weight and be 60: 40 welding.
Embodiment 3
The copper strips base material adopts commercially available oxygen-free copper stripe, and the copper strips base material is implemented heat treatment, is 60 minutes 550 ℃ of following heat treatments.
To electroplate by the electroplate liquid that contains Sn, Pb through heat treated oxygen-free copper stripe, the molar concentration rate of Sn and Pb was controlled at 30: 8; Copper strips base material translational speed is controlled at 20m/min, and electroplate liquid pH value is controlled to be 1.5, and temperature of electroplating solution is controlled to be 15 ℃, and current density is controlled at 30A/dm
2, electroplating time was controlled at 2 minutes, and thickness of coating is controlled at 8 microns.Obtain tin in the coating and plumbous percentage by weight and be 70: 30 welding.
According to actual test result, the solar components that the present invention produced is compared with the product of common process production with the welding product, and comparatively significantly lifting, specific insulation (Ω mm are being arranged aspect the conductance index
2/ m) be reduced to 0.018-0.021 from 0.022-0.023.Because the reduction of welding resistivity with the power output of solar module is got a promotion, according to measuring and calculating, can improve power output 1.5-13.0% approximately.
The present invention has overcome the deficiencies in the prior art, and it is inhomogeneous to have solved the welding thickness of coating, and anomalies such as list edge, scruff, copper scale, variable color effectively improve index (CPK) value of processing procedure ability, and lower than unleaded plating welding fusing point.Have advantage and characteristics mainly contain: technology is simple, reaction fast, the production efficiency height; Product has good solderability; Product has the favorable conductive rate.
The present invention is owing to adopted Terne Electroplating technology, and tin thickness is even, and the surface is very smooth, as shown in Figure 1.And the welding surface of tinning explained hereafter presents tangible arc convex, as shown in Figure 2.
Claims (6)
1. a tin lead welding band that is used for solar photovoltaic assembly comprises the copper strips base material, and it is characterized in that: described copper strips substrate surface is coated with the leypewter layer of one deck densification, and thickness is 3～20 microns.
2. the tin lead welding band that is used for solar photovoltaic assembly as claimed in claim 1 is characterized in that: tin with the percentage by weight of lead is in the described leypewter layer: tin 60～90%, plumbous 10～40%.
3. the tin lead welding band that is used for solar photovoltaic assembly as claimed in claim 1, it is characterized in that: described copper strips base material is oxygen-free copper stripe or copper belt.
4. the manufacture method that is used for the tin lead welding band of solar photovoltaic assembly as claimed in claim 1 is characterized in that: be to adopt electro-plating method to cover the leypewter layer of one deck densification on the copper strips base material, the thickness of leypewter layer is 3～20 microns.
5. the manufacture method that is used for the tin lead welding band of solar photovoltaic assembly as claimed in claim 4, it is characterized in that: the key step of the plumbous electro-plating method of described tin is, the copper strips base material is after heat treatment electroplated by the electroplate liquid that contains Sn, Pb, copper strips base material translational speed is controlled at 3-20m/min, electroplate liquid pH value is controlled at 1～2, temperature of electroplating solution is controlled at 10～30 ℃, and current density is controlled at 10～50A/dm
2, electroplating time was controlled at 60～120 seconds, and thickness of coating is controlled at 3～20 microns.
6. the manufacture method that is used for the tin lead welding band of solar photovoltaic assembly as claimed in claim 5, it is characterized in that: in the described electroplate liquid, the adding form of Sn is stannous sulfate or tin methane sulfonate, the adding form of Pb is lead sulfate or pyrovinic acid lead, and the molar concentration rate of Sn and Pb is controlled at 30: 8～20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110235081XA CN102254978A (en) | 2011-08-16 | 2011-08-16 | Tin-lead welding strip for solar photovoltaic assembly and manufacturing method thereof |
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| CN201110235081XA CN102254978A (en) | 2011-08-16 | 2011-08-16 | Tin-lead welding strip for solar photovoltaic assembly and manufacturing method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443831A (en) * | 2011-12-26 | 2012-05-09 | 上海华友金镀微电子有限公司 | Electroplating process and production line of solar cell sheet solder strip |
| CN102623537A (en) * | 2012-03-31 | 2012-08-01 | 常州大学 | High-efficiency photovoltaic solder strip and use thereof |
| CN103022204A (en) * | 2012-12-12 | 2013-04-03 | 常州大学 | Novel back contacting photovoltaic assembly solder strip and manufacture method thereof |
| CN103199137A (en) * | 2013-03-13 | 2013-07-10 | 袁奇英 | Welding strip used in low-temperature welding mode and used for solar photovoltaic module |
| CN103341703A (en) * | 2013-07-23 | 2013-10-09 | 常州天合光能有限公司 | Method for manufacturing photovoltaic solder strip |
| CN103639586A (en) * | 2013-11-25 | 2014-03-19 | 英利集团有限公司 | Solar cell assembly welding method |
| CN103794656A (en) * | 2013-02-07 | 2014-05-14 | 凡登（常州）新型金属材料技术有限公司 | Solder strip capable of increasing photovoltaic cell assembly power and manufacturing method thereof |
| CN104037241A (en) * | 2013-03-04 | 2014-09-10 | 罗伯特·博世有限公司 | Metal Connector Profile, Solar Module And Method For Manufacturing The Same |
| CN104505413A (en) * | 2014-11-28 | 2015-04-08 | 任立元 | Composite solar battery photovoltaic solder strip |
| CN105390176A (en) * | 2015-12-15 | 2016-03-09 | 北京有色金属与稀土应用研究所 | Tin-lead plating flat copper wire and preparation method thereof |
| CN105870238A (en) * | 2015-01-23 | 2016-08-17 | 比亚迪股份有限公司 | Photovoltaic solder strip and photovoltaic assembly |
| CN106825981A (en) * | 2017-01-12 | 2017-06-13 | 江苏兴达钢帘线股份有限公司 | Conductive welding wire for solar cell and preparation method thereof |
| CN108649088A (en) * | 2018-05-18 | 2018-10-12 | 东腾投资集团有限公司 | A kind of connection method of HIT solar battery sheets and HIT photovoltaic modulies |
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| CN102443831A (en) * | 2011-12-26 | 2012-05-09 | 上海华友金镀微电子有限公司 | Electroplating process and production line of solar cell sheet solder strip |
| CN102623537A (en) * | 2012-03-31 | 2012-08-01 | 常州大学 | High-efficiency photovoltaic solder strip and use thereof |
| CN102623537B (en) * | 2012-03-31 | 2015-07-22 | 常州大学 | High-efficiency photovoltaic solder strip and use thereof |
| CN103022204A (en) * | 2012-12-12 | 2013-04-03 | 常州大学 | Novel back contacting photovoltaic assembly solder strip and manufacture method thereof |
| CN103022204B (en) * | 2012-12-12 | 2016-05-04 | 常州大学 | A kind of back of the body contact photovoltaic module welding strip and preparation method thereof |
| CN103794656B (en) * | 2013-02-07 | 2016-06-08 | 凡登（常州）新型金属材料技术有限公司 | Improve welding of photovoltaic cell component power and preparation method thereof |
| CN103794656A (en) * | 2013-02-07 | 2014-05-14 | 凡登（常州）新型金属材料技术有限公司 | Solder strip capable of increasing photovoltaic cell assembly power and manufacturing method thereof |
| CN104037241A (en) * | 2013-03-04 | 2014-09-10 | 罗伯特·博世有限公司 | Metal Connector Profile, Solar Module And Method For Manufacturing The Same |
| CN103199137A (en) * | 2013-03-13 | 2013-07-10 | 袁奇英 | Welding strip used in low-temperature welding mode and used for solar photovoltaic module |
| CN103341703A (en) * | 2013-07-23 | 2013-10-09 | 常州天合光能有限公司 | Method for manufacturing photovoltaic solder strip |
| CN103639586B (en) * | 2013-11-25 | 2016-01-13 | 英利集团有限公司 | A kind of solar module welding method |
| CN103639586A (en) * | 2013-11-25 | 2014-03-19 | 英利集团有限公司 | Solar cell assembly welding method |
| CN104505413A (en) * | 2014-11-28 | 2015-04-08 | 任立元 | Composite solar battery photovoltaic solder strip |
| CN104505413B (en) * | 2014-11-28 | 2016-08-17 | 任立元 | Composite solar battery photovoltaic welding belt |
| CN105870238A (en) * | 2015-01-23 | 2016-08-17 | 比亚迪股份有限公司 | Photovoltaic solder strip and photovoltaic assembly |
| CN105870238B (en) * | 2015-01-23 | 2018-05-08 | 比亚迪股份有限公司 | A kind of photovoltaic welding belt and a kind of photovoltaic module |
| CN105390176A (en) * | 2015-12-15 | 2016-03-09 | 北京有色金属与稀土应用研究所 | Tin-lead plating flat copper wire and preparation method thereof |
| CN106825981A (en) * | 2017-01-12 | 2017-06-13 | 江苏兴达钢帘线股份有限公司 | Conductive welding wire for solar cell and preparation method thereof |
| CN106825981B (en) * | 2017-01-12 | 2019-05-24 | 江苏兴达钢帘线股份有限公司 | The preparation method of conductive welding wire for solar battery |
| CN108649088A (en) * | 2018-05-18 | 2018-10-12 | 东腾投资集团有限公司 | A kind of connection method of HIT solar battery sheets and HIT photovoltaic modulies |
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Address after: 201702, No. 6666 Ying Tung Road, Qingpu District, Shanghai Applicant after: SHANGHAI WELNEW MICRO-ELECTRONICS CO., LTD. Address before: 201700 No. 101, No. 5500, Pine Road, Qingpu Industrial Zone, Qingpu District, Shanghai Applicant before: Shanghai Huayou Gilding Microelectronics Co., Ltd. |
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Inventor after: Xiao Di Inventor after: Xiao Guangyuan Inventor before: Xiao Di |
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Free format text: CORRECT: APPLICANT; FROM: SHANGHAI HUAYOU GILDING MICROELECTRONICS CO., LTD. TO: SHANGHAI WELNEW MICRO-ELECTRONICS CO., LTD. Free format text: CORRECT: INVENTOR; FROM: XIAO DI TO: XIAO DI XIAO GUANGYUAN |
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Application publication date: 20111123 |