CN103022203A - Photovoltaic solder strip and preparation method thereof - Google Patents
Photovoltaic solder strip and preparation method thereof Download PDFInfo
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- CN103022203A CN103022203A CN2012105103096A CN201210510309A CN103022203A CN 103022203 A CN103022203 A CN 103022203A CN 2012105103096 A CN2012105103096 A CN 2012105103096A CN 201210510309 A CN201210510309 A CN 201210510309A CN 103022203 A CN103022203 A CN 103022203A
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- welding
- aluminium core
- zinc
- base material
- activation
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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
Abstract
The invention relates to a novel photovoltaic solder strip which is low in cost and efficient. The main structure of the photovoltaic solder strip uses an aluminum core as a conducting material, and a layer of welding alloy is respectively covered on the upper surface and the lower surface to be used as a welding material. The production cost of the solder strip is 15%-20% lower than that of a convention solder strip, the performance of the solder strip is similar to that of the convention solder strip, and the photovoltaic solder strip can be used for preparing solar cell modules.
Description
Technical field the invention belongs to area of solar cell, relates to a kind of novel low-cost, high-efficiency photovoltaic welding.
Background technology
Conventional photovoltaic all is take the copper core as electric conducting material with welding at present, covers the lead welding of last layer tin at the copper wicking surface again and connects material as weld layer; Be processed at last required dimensions.
Along with the development of industry, more and more stricter to the control of the cost of material.Although and the copper core has good electric conductivity, because copper material belongs to precious metal material, price can be in any more always.Along with the fluctuation of International Nonferrous Metals forward market, also when the river rises the boat goes up for the copper product price in recent years.
The decay resistance of copper material is relatively poor, and solar module can discharge some organic corrosion compositions under long-term outwork condition, and these corrosion compositions can directly chemical reaction occur and affect its conductivity and reliability with the copper core.
Although the aluminium electric conductivity is more not good enough a little than copper material, cost is but far below copper material.Even if under the condition that satisfies the identical conduction performance, the aluminium cost is also less than 50% of copper material cost.
Aluminium can't be welded direct to above the silver grating line on the solar battery sheet, need to be at surface coverage layer of soldering material layer.Because how the character of aluminium itself covers cheaply layer of soldering material thereon and can't be well solved always.
Summary of the invention
The deficiency that exists with welding in order to solve existing photovoltaic, the present invention adopts the aluminium core as electric conducting material, covers layer of soldering material as weld layer in aluminium core upper and lower surface, thereby a kind of scheme that substitutes existing conventional welding is provided.Technical scheme of the present invention is:
A kind of photovoltaic welding comprises electric conducting material, and described electric conducting material is that purity is higher than 99.9% aluminium core base material, is equipped with the welding alloy layer in aluminium core base material upper and lower surface.
Described aluminium core base material thickness is 0.1mm ~ 1mm, and width can adjust according to the cell piece that welds, and conventional width dimensions is 1mm, 1.5mm, 2mm etc.
But all be coated with one deck welding alloy in aluminium core base material upper and lower surface, but the thickness of welding alloy layer is 0.005mm to 0.05mm, its material composition can be adjusted according to the different application occasion.Welding required welding alloy such as conventional photovoltaic is leypewter, and typical mass percent is Sn63Pb37, perhaps Sn60Pb40; For the conductivity and the welding performance that increase alloy-layer, the alloy mass composition can be adjusted to Sn62Pb36Ag2; In some unleaded application scenario, this alloy can be that Sn-Cu is that Sn-Bi is that Sn-In system and Sn-Zn are that typical mass percent is Sn42Bi58, Sn85Bi10Zn5, Sn52In20Ag28 etc. for Sn-Ag.The technique that welding material covers on the aluminium core electric conducting material can be chemical plating, electroplates perhaps hot-dip.
Can exist transition alloy layer to improve adhesion between the two between aluminium core electric conducting material and the welding alloy layer, transition alloy layer can have for metallic nickel layer, metallic zinc layer etc. and aluminium core the material of fine adhesion, and thickness can be 0.0005mm to 0.005mm.
The present invention also provides the preparation method of described photovoltaic with welding, first aluminium core base material is carried out surface activation and processes, and by chemical plating, plating or hot-dip welding material is covered the upper and lower surface of aluminium core electric conducting material again.
Before covering coating, need to be with aluminium core substrate surface activation, surface activation is processed and can be processed for ultrasonic wave is active, plasma activation, heavy zinc activation; Wherein the process of heavy zinc activation is that electrochemical deoiling-alkaline etching-acid etching-once heavy zinc-nitric acid moves back the heavy zinc of zinc-secondary; Wherein oil removing can be organic solvent (C2-H-Cl3) oil removing, and alkaline etching and acid etching mainly are the oxide layers of removing the aluminium wicking surface, and the alkaline etching condition is at mass percent being corrosion 0.5 minute ~ 5 minutes in 10 ~ 30% the NaOH solution; The acid etching condition is for being 40 ~ 70%H at mass percent
3PO
4, 10 ~ 30%HNO
3With 10 ~ 30%NH
4Corrosion is 1 minute ~ 10 minutes in the solution of F; The Main Function of heavy zinc is in order further to remove surface oxide layer, the time is approximately 1 second ~ and 60 seconds.The condition that nitric acid moves back zinc is at mass percent being 5 ~ 25% HNO
3Solution, the time is 0.5 minute ~ 5 minutes.
The production cost of welding of the present invention is than conventional welding low 15% ~ 20%, performance and conventional welding are similar, and the resistivity of conventional photovoltaic welding belt is about 2.5 μ Ω cm, adjusts the thickness of this welding, its resistivity also can reach 2.5 μ Ω cm, can be used for the preparation of solar module.
Description of drawings
Fig. 1 is the photovoltaic component lamination schematic diagram.
Drawing reference numeral
1 glass
2 EVA(one)
Solar cell after 3 series connection
4 EVA(two)
5 backboards.
Embodiment
Present embodiment is implemented under take technical solution of the present invention as prerequisite, has provided detailed execution mode and process, but protection scope of the present invention is not limited to following embodiment.
Embodiment one
1. be higher than 99.9% aluminium core base material as electric conducting material with purity, aluminium core base material thickness is 0.3mm, and width is 1.5mm.
2. aluminium core base material is sunk the zinc activation, its process is: 1) with 40% C2-H-Cl3 Solvent degreasing; 2) being corrosion 1 minute in 20% the NaOH alkaline solution at mass percent, is 50%H at mass percent then
3PO
4, 25%HNO
3And 25%NH
4Corrosion is 4 minutes in the acid solution of F; Alkaline etching and acid etching mainly are the oxide layers of removing the aluminium wicking surface; 3) heavy zinc is processed in order to further remove surface oxide layer, and the time was approximately for 10 seconds; 4) be that 10% salpeter solution moves back zinc and processes with mass percent, the time is 2 minutes; 5) the heavy zinc of secondary, the time was 20 seconds.
3. at aluminium lamination electroplating surface layer of metal nickel dam, thickness is 0.0005mm.
4. 3 seconds of immersion plating among the leaded Xi Chi that the material after will electroplating is 300 ℃ (mass ratio of tin lead is 3:2) are at the Sn60Pb40 of welding surface heat immersion plating last layer 0.02mm thickness.
Embodiment two
1. be higher than 99.9% aluminium core base material as electric conducting material with purity, aluminium core base material thickness is 0.1mm, and width is 1mm.
2. aluminium core base material is sunk the zinc activation, its process is: 1) with 35% C2-H-Cl3 Solvent degreasing; 2) being corrosion 1 minute in 15% the NaOH alkaline solution at mass percent, is 45%H at mass percent then
3PO
4, 30%HNO
3And 30%NH
4Corrosion is 3 minutes in the acid solution of F; Alkaline etching and acid etching mainly are the oxide layers of removing the aluminium wicking surface; 3) heavy zinc is processed in order to further remove surface oxide layer, and the time was approximately for 10 seconds; 4) be that 5% salpeter solution moves back zinc and processes with mass percent, the time is 5 minutes; 5) the heavy zinc of secondary, the time was 20 seconds.
3. at aluminium lamination electroplating surface layer of metal zinc layer, thickness is 0.005mm.
4. 2.5 seconds of immersion plating among the Xi Chi of the bismuth-containing that the material after will electroplating is 200 ℃ (mass ratio of tin bismuth is 7:10) are at the Sn42Bi58 of welding surface heat immersion plating last layer 0.02mm thickness.
Embodiment three
1. be higher than 99.9% aluminium core base material as electric conducting material with purity, aluminium core base material thickness is 1mm, and width is 2mm.
2. aluminium core base material is sunk the zinc activation, its process is: 1) with 35% C2-H-Cl3 Solvent degreasing; 2) being corrosion 0.5 minute in 30% the NaOH alkaline solution at mass percent, is 70%H at mass percent then
3PO
4, 10%HNO
3And 10%NH
4Corrosion is 5 minutes in the acid solution of F; Alkaline etching and acid etching mainly are the oxide layers of removing the aluminium wicking surface; 3) heavy zinc is processed in order to further remove surface oxide layer, and the time was approximately for 20 seconds; 4) be that 25% salpeter solution moves back zinc and processes with mass percent, the time is 0.5 minute; 5) the heavy zinc of secondary, the time is 20 seconds.
3. at aluminium lamination electroplating surface layer of metal nickel dam, thickness is 0.0005mm.
4. the material after will electroplating 3 seconds of immersion plating in 400 ℃ the Xi Chi that contains indium and silver (mass ratio of tin, indium and silver is 13:5:7) are at the Sn52In20Ag28 of welding surface heat immersion plating last layer 0.015mm thickness.
Embodiment four
The accompanying drawing of explanation is used for the present invention is further explained herein, consists of the application's a part, and indicative icon of the present invention is used for explaining the present invention that do not consist of improper restriction of the present invention, protection scope of the present invention is not limited to following schematic diagram.
1. battery is welded on the aluminum welding respectively the front and back electrode of cell piece through behind the electric performance test.
2. will weld good monolithic battery contacts.
3. as shown in Figure 1: prepare glass 1, upper strata EVA 2, the solar cell 3 behind the series welding, the EVA of lower floor 4, backboard 5.Lay the thick transparent EVA 2 of one deck 0.5mm on the glass 1, then lay the good battery of series welding 3, by welding the good solar battery sheet of series welding is coupled together again.Lay EVA 4 at the back side of this solar battery sheet 3 more afterwards, lay at last backboard
5。The stacking material that lays is put into laminating machine laminating, and unnecessary EVA and the backboard of edge carried out cut edge after lamination finished, and carried out subsequent technique after the laminate cooling.
Claims (7)
1. a photovoltaic welding comprises electric conducting material, it is characterized in that: described electric conducting material is that purity is higher than 99.9% aluminium core base material, is equipped with the welding alloy layer in aluminium core base material upper and lower surface.
2. described photovoltaic welding according to claim 1 is characterized in that described aluminium core base material thickness is 0.1mm ~ 1mm; The thickness of welding alloy layer is 0.005mm to 0.05mm.
3. described photovoltaic welding according to claim 1 is characterized in that between described aluminium core electric conducting material and the welding alloy layer transition alloy layer being arranged.
4. described photovoltaic welding according to claim 4 is characterized in that described transition alloy layer is metal nickel dam or metallic zinc layer, and thickness is 0.0005mm to 0.005mm.
5. the preparation method of the described photovoltaic usefulness of claim 1 welding is characterized in that, first aluminium core base material is carried out surface activation and processes, and by chemical plating, plating or hot-dip welding material is covered the upper and lower surface of aluminium core electric conducting material again.
6. preparation method according to claim 5 is characterized in that: described aluminium core substrate surface activation is that ultrasonic wave is actively processed, plasma activation or heavy zinc activation.
7. preparation method according to claim 5 is characterized in that: the process of described heavy zinc activation is that electrochemical deoiling-alkaline etching-acid etching-once heavy zinc-nitric acid moves back the heavy zinc of zinc-secondary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105103096A CN103022203A (en) | 2012-12-04 | 2012-12-04 | Photovoltaic solder strip and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105103096A CN103022203A (en) | 2012-12-04 | 2012-12-04 | Photovoltaic solder strip and preparation method thereof |
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| CN103022203A true CN103022203A (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012105103096A Pending CN103022203A (en) | 2012-12-04 | 2012-12-04 | Photovoltaic solder strip and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009108A (en) * | 2011-05-03 | 2014-08-27 | 蒙特集团（香港）有限公司 | High-weldable efficient photovoltaic welding strip |
| CN104480418A (en) * | 2014-12-12 | 2015-04-01 | 苏州工业职业技术学院 | Tinplating method and tinplating device of photovoltaic welding belt |
| CN109560158A (en) * | 2018-10-29 | 2019-04-02 | 无锡明协科技实业有限公司 | A kind of preparation method of Copper base material photovoltaic welding belt |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4613069A (en) * | 1981-11-23 | 1986-09-23 | The United States Of America As Represented By The Secretary Of The Interior | Method for soldering aluminum and magnesium |
| CN101348930A (en) * | 2008-09-10 | 2009-01-21 | 童芬德 | Electroplating method of aluminum alloy |
| CN102212855B (en) * | 2011-05-20 | 2012-07-11 | 湘潭大学 | Aluminium strip with tin soldering performance and high corrosion resistance and preparation technology thereof |
-
2012
- 2012-12-04 CN CN2012105103096A patent/CN103022203A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4613069A (en) * | 1981-11-23 | 1986-09-23 | The United States Of America As Represented By The Secretary Of The Interior | Method for soldering aluminum and magnesium |
| CN101348930A (en) * | 2008-09-10 | 2009-01-21 | 童芬德 | Electroplating method of aluminum alloy |
| CN102212855B (en) * | 2011-05-20 | 2012-07-11 | 湘潭大学 | Aluminium strip with tin soldering performance and high corrosion resistance and preparation technology thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009108A (en) * | 2011-05-03 | 2014-08-27 | 蒙特集团（香港）有限公司 | High-weldable efficient photovoltaic welding strip |
| CN104480418A (en) * | 2014-12-12 | 2015-04-01 | 苏州工业职业技术学院 | Tinplating method and tinplating device of photovoltaic welding belt |
| CN109560158A (en) * | 2018-10-29 | 2019-04-02 | 无锡明协科技实业有限公司 | A kind of preparation method of Copper base material photovoltaic welding belt |
| CN109560158B (en) * | 2018-10-29 | 2020-06-19 | 无锡明协科技实业有限公司 | Preparation method of copper substrate photovoltaic solder strip |
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Application publication date: 20130403 |