WO2012159664A1 - Nouveau conducteur électrique enrobé pour interconnexions de cellules solaire dans des modules photovoltaïques - Google Patents

Nouveau conducteur électrique enrobé pour interconnexions de cellules solaire dans des modules photovoltaïques Download PDF

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Publication number
WO2012159664A1
WO2012159664A1 PCT/EP2011/058444 EP2011058444W WO2012159664A1 WO 2012159664 A1 WO2012159664 A1 WO 2012159664A1 EP 2011058444 W EP2011058444 W EP 2011058444W WO 2012159664 A1 WO2012159664 A1 WO 2012159664A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrical conductor
conductor
coated surfaces
solar cell
elongated electrical
Prior art date
Application number
PCT/EP2011/058444
Other languages
English (en)
Inventor
Tag Hammam
Original Assignee
Luvata Espoo Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Luvata Espoo Oy filed Critical Luvata Espoo Oy
Priority to PCT/EP2011/058444 priority Critical patent/WO2012159664A1/fr
Publication of WO2012159664A1 publication Critical patent/WO2012159664A1/fr

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Classifications

    • 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
    • H01L31/0512—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 made of a particular material or composition of materials
    • 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

Definitions

  • the present invention refers to a coated elongated electrical conductor according to the characterized portion of claim 1 and a method for manufacturinga photovoltaic module according to the characterized portion of claim 1 1.
  • the invention further relates to a silicon solar cell comprising said coated electrical conductor.
  • a silicon photovoltaic module consists in general of a number of silicon wafers or solar cells connected in series. The series connection is made by the front contact of the first solar cell to the back contact of the next solar ceil and so forth.
  • the electrical connections between the solar cells are made by soldering copper string-wires to receiving surfaces comprising a metallic conductor on the front, respective back side of the solar cells. Normally, a thick layer of soldering material is used to guarantee a proper connection between the solar cell and electrical copper conductor.
  • the layer of soldering material that covers the surface of the electrical conductor may have a thickness of 10 to 40 pm.
  • soldering material is relatively expensive.
  • the costs for the soldering material may add up to 20 to 25% of the total manufacturing costs for a string wire.
  • the string wires or electrical conductors need to be positioned accurately on the receiving surface of the solar cells.
  • the electrical conductor Prior to soldering, the electrical conductor are placed in close proximity of the receiving surface. Vacuum cups or suction cups that hold the electrical conductor may be used for this purpose. Alternatively, electrostatic positioning may be used. However, during soldering, the soider material melts, whereby the connection between the cups and the electrical conductor becomes flexible. This flexibility makes it extremely difficult to position the electrical conductor with enough precision on the solar cell.
  • the equipment used during manufacturing of the photovoltaic module can become contaminated with soldering material.
  • the contaminated equipment for example the vacuum cups, needs to be cleaned on a regular basis.
  • the cleaning of equipment is a time consuming and costly aspect of the manufacturing process.
  • DE 02006058892 discloses the use of a protection layer between the equipment and electrical conductor covered with soldering material. This protection layer may prevent contamination of the equipment. It does not solve the problem regarding positioning of the electrical conductor.
  • the shading of the incoming light by the electrical conductor is another known problem.
  • the electrical conductors cover about 3 to 10% of the front side of the solar cell and thus reduce the amount of incoming light. If the electrical conductor is wrongly placed on the solar cell the shading may increase, which may reduce the amount of light that hits the active area of the solar cell. Further, the bright surfaces of the electrical conductors reflect light away from the solar cell. These front conductors may lower the efficiency of the photovoltaic module by 3 to 10% due to this specular reflection. It would thus be advantageous to minimise the shading and specular reflection by the front conductor.
  • WO 2009/126745 and US 2008/0053511 describe different ways for coating the electrical conductors in photovoltaic modules in order to achive diffuse reflection of light.
  • part of the reflected light will hit the active area of the solar cell because the reflected light is redirected by total reflection. It is believed that about 30 to 50% of the light that hits the electrical conductor on the front side of the solar cell could be reflected back to the active area of the solar cell. This way, the total efficiency of the photovoltaic module may be increased by 2 to 5%.
  • One object of the invention is to minimise the amount of soldering material. Another object of the invention is to improve positioning of an electrical conductor on a solar ceil. Yet a further object of the invention is to reduce or prevent contamination of manufacturing equipment with the soldering material. Yet another object of the invention is to reduce the overall costs for the manufacturing of electrical conductor and the photovoltaic modules. Yet a further object is to increase the overall efficiency of the photovoltaic modules.
  • the novel elongated electrical conductor wire initially defined characterized in that the attachment surfaces and the coated surfaces are arranged alternately on the the top and bottom side of the electrical conductor, and whereby the coated surfaces are configured not to melt during soldering.
  • the electrical conductor wire is cut into a single conductor, whereby the attachment surfaces cover half the top side (T) on a left hand side (L) and half the bottom side (B) on a right hand side (R) and the coated surfaces cover half the top side (T) on the right hand side (R) and half the bottom side (B) on the left hand side (L).
  • the surfaces on the side of the conductor along the vertical Z-axis comprise the coated surface and/or the attachment surface.
  • One advantage of the electrical conductor of the present invention is a substantial reduction in the amount of soldering material used.
  • the coated surfaces cover about half the surface of the new electrical conductor. Only the remaining surface will be covered with soldering material in contrast to the substantially whole surface of the known conductors. Because the costs for soldering is a substantial part of the total manufacturing costs for the string wire and photovoltaic module, the overall manufacturing costs will be decreased remarkably.
  • Positioning of the electrical conductor on the solar cell is also improved with the new electrical conductor.
  • the electrical conductor can now be handled by the positioning equipment placed on parts of the surface that is not covered by soldering material. The positioning equipment does not need to directly contact the
  • soldering material itself.
  • the coated surface will not melt during soldering.
  • the contact between the positioning equipment and the electrical conductor remains firm and stabile during soldering.
  • the coated surfaces repel the soldering material. This will further reduce contamination of equipment such as machines, conveyer belts, suction cups etc., with soldering
  • An additional advantage of the electrical conductor of the present invention is that the electrical conductor can be narrower.
  • narrower conductor will shade less light on the front side of the solar cell.
  • Narrower electrical conductors may also create the opportunity to use a greater number of conductors per solar cell. This will reduce the distance between the conductors, wherein the length of so called silver fingers extending perpendicular to the conductors on the receiving surface of the solar cell between the conductors is reduced.
  • the function of the silver fingers is to conduct electrons to the electrical conductors. With a maintained total cross section of the conductors, an increase of the number of conductors will thus result in a shorter length of the silver fingers that will reduce the electric resistance of the silver fingers, wherein the efficiency of the module increases.
  • narrower electrical conductors not only costs but even the overall effectiveness of the photovoltaic module can be further improved by using narrower electrical conductors.
  • the electrical conductor is cut into a single conductor arranged with a size suitable for connecting two adjacent solar cells.
  • the coated surfaces reflects light by diffuse reflection.
  • the coating is preferably configured to reflect, scatter and/or diffuse light in such a way that a substantial portion of the light striking the coating is reflected back by total internal reflection to hit the active areas of the solar cells. Improving the diffuse reflection of light will increase efficiency of the photovoltaic module further.
  • Photovoltaic modules are used in industrial facilities and in residences. For some applications, the aesthetic sense of a photovoltaic module is important. Therefore, the shining silver coloured electrical conductors against the background of the dark solar cells may be problematic. To improve the aesthetic
  • the electrical conductors may be coated with a dark coating.
  • the coated surfaces have substantially the same colour as the solar cells.
  • the coated surfaces of the elongated electrical conductor may comprise of different materials depending on the application of the solar cells.
  • the coated surfaces comprise material with diffuse reflector properties.
  • the coated surfaces comprise aluminium oxide, titanium oxide, or alloys and/or mixtures thereof.
  • the coated surfaces have a thickness of 0.01 to 30 prn.
  • the soldering material is a tin based and lead-free material.
  • a lead-free soldering material is preferred, e.g. Sn or SnAg.
  • a higher temperature is needed for soldering lead-free material. Such higher temperatures make positioning of the electrical conductor on the solar cell more difficult and increase the risk for contamination of equipment by soldering material.
  • the novel coated electrical conductor which can be lifted and positioned using part of the surface that is coated with material that does not melt during soldering, overcomes these problems. Therefore, in one
  • the attachment surfaces are covered with substantially lead-free soldering material.
  • Manufacturing processes are preferably continuous processes or so called on-line processes. Providing a continuous process becomes challenging when different materials (e.g. different coatings) and different process temperatures need to be used during
  • Another object of the invention is achieved by the method for manufacturing a photovoltaic module comprising at least one solar cell and at least one elongated electrical conductor characterized in that the method comprises the steps of;
  • the method further comprises the steps of winding the conductor on a coil after cooling and/or unwinding and cutting the conductor before positioning the electrical conductor.
  • the coated surfaces are applied to the electrical conductor using techniques selected from the group comprising plasma spraying (PS), high velocity oxygen fuel spraying (HVOF), chemical vapour deposition (CVD), applying ceramic slurry, sol-gel method or physical vapour deposition (PVD) such as sputtering and electron beam physical vapour spraying (EB-PVD).
  • PS plasma spraying
  • HVOF high velocity oxygen fuel spraying
  • CVD chemical vapour deposition
  • PVD physical vapour deposition
  • EB-PVD electron beam physical vapour spraying
  • One embodiment relates to an elongated electrical conductor manufactured according to the method described above.
  • Another embodiment relates to a silicon solar cell comprising at least one solar cell attached to at least one elongated electrical conductor described above.
  • Fig. 1 shows a photovoltaic module with three soiar cells in
  • Fig. 2 shows a side view of a part of the elongated electrical conductor wire.
  • Fig. 3 shows a side view of a single electrical conductor with coated surfaces and attachment surfaces.
  • Fig. 4 shows a side view of a single electrical conductor with variations for coated surfaces and attachment surfaces on the sides of the conductor along the Z-axis.
  • Fig 5 shows a top view of the single electrical conductor from
  • Fig. 1 shows a series of three soiar cells 2 in a photovoltaic module 3 electrically connected by an elongated electrical conductors 1.
  • Fig. 2 shows the electrical conductor 1 as an unwinded wire with the coating surfaces 4 and attachment surfaces 5 alternatingly present on the upper or top side T and the under or bottom side B.
  • Fig. 3 shows a single conductor 1 , which has been cut from the wire in Fig. 2.
  • the electrical conductor 1 has a longitudinal Y-axis, a vertical Z-axis, a top side T, a bottom side B, a left side L and a right side R. Also shown are the coated surfaces 4 and the
  • the coated and attachment surfaces 4, 5 are alternately arranged on the surface of the electrical conductor 1.
  • the attachment surface 5 covers half the top side T on the left hand side L and half the bottom side B on the right hand side R of the electrical conductor 1.
  • the coated surface 4 covers the remaining surface of the electrical conductor 1.
  • the coated and attachment surfaces 4, 5 cover part of the surface. This part may include the top and bottom sides T, B as well as the vertical sides of electrical conductor along the vertical Z-axis.
  • Fig. 4 shows a conductor 1 whereby the side of the conductor 1 has partly been coated with the coating surface 4 and the attachment surface 5.
  • the ratio of coated surface 4 versus attachment surface 5 may vary and depend on the application of the electrical conductor 1.
  • the coating of the coated surfaces 4 may be prepared from any material that does not melt during soldering of the electrical conductor 1 to the solar cell 3.
  • the coating comprises alumina, alumina oxide, titanium, titanium oxide. Alloys and/or mixtures of alumina and titanium may be used as well. Examples of coatings may be Al 2 0 3 or Al 2 0 3 -Zr0 2 , TiO and Ti0 2 . Titanium dioxide is a preferred coating material.
  • polymer coating material such as polyurethane enamel, may be used or a coating material comprising an oxide, silicon particles and an adhesive.
  • the coating material repels the soldering material. This would reduce contamination of the manufacturing equipment, which further improves the efficiency of the manufacturing process.
  • the materials mentioned above, especially titanium dioxide, are believed to possess this repelling quality. Further properties of importance are wear resistance, fracture toughness, adhesive and cohesive strength, corrosion resistance and thermal resistance and the like. The importance of these properties may depend on the application and size of the photovoltaic module 3 or even the climate in which the solar cells 2 are to be used.
  • the porosity of the material is preferably less then 10% or between 1 % and 15% or 5% and 10%.
  • the thickness of the coating layer may depend on the method used for applying the coated surface. The thickness may also be adjusted as needed. The thickness of the coated surface is preferably below 40 pm or between 0.001 to 40 pm, or between 0.01 to 30 pm or 0.05 to 20 pm.
  • the electrical conductor 1 advantageously reflect the light by diffuse reflection.
  • the diffuse reflected light is reflected with such an angle that the light is reflected back to the active area of the solar cell 2 by total reflection by a cover, wherein the the amount of light used by the solar cell 2 increases.
  • the aesthetic appearance of the photovoltaic module 3 may be important.
  • the aesthetics of the module 3 may be improved by providing a dark colour (black, bruin, blue, violet, etc.) over the shining surfaces of the electrical conductors 1. This can be done by any method, for example painting the surfaces or covering the surfaces with a dark plastic cover.
  • the attachment surfaces are preferably covered with !ead-free or substantially lead-free soldering material.
  • the higher temperatures needed for soldering lead-free soldering material can be applied to attach the new electrical conductor 1 to the solar cell 2.
  • Soldering material such as Sn-Bi-, Sn-Ag-, or Sn-Ag-Cu- or Sn-Cu-alloys may be used. Alternatively, soldering material comprising residual amounts of lead may be used.
  • the electrical conductor 1 may be prepared by providing the copper wire.
  • the electrical conductor 1 will then be coated on part of the top side T and part of the bottom side B of the electrical conductor 1. This coating may be done using any applicable coating method. Examples of such methods are plasma spraying, high velocity oxygen fuel spraying, chemical vapour deposition, using ceramic slurry, sol-gel method or physical vapour deposition such as sputtering and electron beam physical vapour spraying.
  • a preferred method is plasma spraying.
  • the soldering material may be applied to the electrical conductor 1 by dipping the conductor 1 into a bath of soldering material.
  • the soldering material will preferably be repelled by the coated surface and will thus not attach to this coated surface.
  • the attachment surfaces 5 of the electrical conductor 1 may then be cooled to room temperature.
  • the wire of the electrical conductor 1 may then be winded on a coil. Before applying the electrical conductor to the solar cell 2, the wire may be unwinded and cut into single electrical conductors 1.
  • the electrical conductor 1 may be lifted and positioned in close proximity of a position on the solar cell 2 where the conductor 1 is to be attached, i.e. the receiving surface on the solar cell 2.
  • the suction cups are attached to the electrical conductor 1 on the coated surface 4 of the conductor .
  • the coated surface 4 will be free or substantially free of soldering material. Therefore, the suction cups are not or hardly contaminated with soldering material.
  • the electrical conductor 1 may be soldered on the solar cell 2. Because the coated material does not melt during soldering, the suction cups will remain firmly attached to the electrical conductor 1 during soldering. This in turn makes it this possible to position the electrical conductor 1 on the solar cell 2 with great precision.
  • the process for manufacturing the solar cell 2 has thus been made more efficient. The need for cleaning of the manufacturing equipment will be reduced as well. The amount of materials used can also be reduced. This is
  • the amount of tin used may be reduced by 50% using the new coated electrical conductor.
  • the coating material preferably diffuses the incoming light. This increases the overall efficiency of the photovoltaic module 3.
  • the width of the electrical conductor can be reduced. This again may save costs for materials. It may also reduce the shading of the active area in the solar cell 2.
  • the new coated electrical conductor 1 makes it possible to use less material or at least less soldering material during the manufacture of the conductor 1 and the photovoltaic module 3.
  • the new electrical conductor 1 also provides for a more efficient photovoltaic module 3 and a more efficient manufacturing process. Cost savings are thus achieved in different ways.
  • the present invention also relates to use of the electrical conductor 1 according to present invention in a photovoltaic module 3.
  • the present invention further relates to use of the electrical conductor 1 according to present invention in a silicon solar ceil.

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  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

La présente invention concerne un fil conducteur électrique allongé (1) ayant un axe Y longitudinal, un axe Z vertical, une face supérieure (T), une face inférieure (B) avec au moins deux surfaces enrobées (4) recouvrant partiellement la surface du conducteur (1), et au moins deux surfaces de fixation (5) configurées pour être fixées à une surface réceptrice d'une première et d'une seconde cellules solaires (2) pour établir une connexion électrique entre le conducteur électrique et les cellules solaires, lesdites surfaces de fixation étant au moins partiellement recouvertes de matériau de brasure, caractérisé en ce que les surfaces de fixation et les surfaces enrobées sont agencées alternativement sur les faces supérieure et inférieure du conducteur électrique, les surfaces enrobées étant configurées pour ne pas fondre pendant la brasure. L'invention concerne aussi un procédé de fabrication d'un module photovoltaïque (3) comprenant un conducteur électrique allongé et une cellule solaire.
PCT/EP2011/058444 2011-05-24 2011-05-24 Nouveau conducteur électrique enrobé pour interconnexions de cellules solaire dans des modules photovoltaïques WO2012159664A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/058444 WO2012159664A1 (fr) 2011-05-24 2011-05-24 Nouveau conducteur électrique enrobé pour interconnexions de cellules solaire dans des modules photovoltaïques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/058444 WO2012159664A1 (fr) 2011-05-24 2011-05-24 Nouveau conducteur électrique enrobé pour interconnexions de cellules solaire dans des modules photovoltaïques

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WO2012159664A1 true WO2012159664A1 (fr) 2012-11-29

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013104452A1 (fr) * 2012-01-13 2013-07-18 Robert Bosch Gmbh Procédé et dispositif de fabrication ou de réparation d'un module solaire
CN108470792A (zh) * 2018-05-30 2018-08-31 无锡尚德太阳能电力有限公司 分段式配色光伏焊带及其制造方法
CN108538947A (zh) * 2018-06-08 2018-09-14 浙江宝利特新能源股份有限公司 一种分段式着色光伏焊带及光伏组件
CN112397606A (zh) * 2019-08-14 2021-02-23 泰州隆基乐叶光伏科技有限公司 一种分段式黑色焊带制备方法及分段式黑色焊带
CN113823706A (zh) * 2021-11-23 2021-12-21 常州九天新能源科技有限公司 单面镀锡光伏黑色汇流条及其制作方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1102331A2 (fr) * 1999-11-22 2001-05-23 Canon Kabushiki Kaisha Elément photovoltaique et son procédé de fabrication, méthode pour enlever une partie de recouvrement d'un fil conducteur couvert et méthode pour connecter un fil conducteur couvert et un conducteur
US20080053511A1 (en) 2004-04-28 2008-03-06 Moritaka Nakamura Integrated Wiring Member for Solar Cell Module, Solar Cell Module Using the Same, and Manufacturing Methods Thereof
DE102006058892A1 (de) 2006-12-05 2008-06-12 Somont Gmbh Verfahren und Einrichtung zum Herstellen einer Lötverbindung
WO2009126745A2 (fr) 2008-04-11 2009-10-15 Qualcomm Mems Technologies, Inc. Procédé d'amélioration de l'esthétique et de l'efficacité d'un dispositif photovoltaïque (pv)
WO2011003969A2 (fr) * 2009-07-10 2011-01-13 Eppsteinfoils Gmbh & Co Kg Système composite pour modules photovoltaïques
DE102009051943A1 (de) * 2009-11-04 2011-05-05 W.C. Heraeus Gmbh Flexibler Solarverbinder für Rückseitenkontaktzellen hergestellt durch Druck- und Rollstanzverfahren

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1102331A2 (fr) * 1999-11-22 2001-05-23 Canon Kabushiki Kaisha Elément photovoltaique et son procédé de fabrication, méthode pour enlever une partie de recouvrement d'un fil conducteur couvert et méthode pour connecter un fil conducteur couvert et un conducteur
US20080053511A1 (en) 2004-04-28 2008-03-06 Moritaka Nakamura Integrated Wiring Member for Solar Cell Module, Solar Cell Module Using the Same, and Manufacturing Methods Thereof
DE102006058892A1 (de) 2006-12-05 2008-06-12 Somont Gmbh Verfahren und Einrichtung zum Herstellen einer Lötverbindung
WO2009126745A2 (fr) 2008-04-11 2009-10-15 Qualcomm Mems Technologies, Inc. Procédé d'amélioration de l'esthétique et de l'efficacité d'un dispositif photovoltaïque (pv)
WO2011003969A2 (fr) * 2009-07-10 2011-01-13 Eppsteinfoils Gmbh & Co Kg Système composite pour modules photovoltaïques
DE102009051943A1 (de) * 2009-11-04 2011-05-05 W.C. Heraeus Gmbh Flexibler Solarverbinder für Rückseitenkontaktzellen hergestellt durch Druck- und Rollstanzverfahren

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013104452A1 (fr) * 2012-01-13 2013-07-18 Robert Bosch Gmbh Procédé et dispositif de fabrication ou de réparation d'un module solaire
CN108470792A (zh) * 2018-05-30 2018-08-31 无锡尚德太阳能电力有限公司 分段式配色光伏焊带及其制造方法
CN108538947A (zh) * 2018-06-08 2018-09-14 浙江宝利特新能源股份有限公司 一种分段式着色光伏焊带及光伏组件
CN112397606A (zh) * 2019-08-14 2021-02-23 泰州隆基乐叶光伏科技有限公司 一种分段式黑色焊带制备方法及分段式黑色焊带
CN113823706A (zh) * 2021-11-23 2021-12-21 常州九天新能源科技有限公司 单面镀锡光伏黑色汇流条及其制作方法

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