WO2019159255A1 - Procédé de fabrication de module de cellules solaires - Google Patents

Procédé de fabrication de module de cellules solaires Download PDF

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Publication number
WO2019159255A1
WO2019159255A1 PCT/JP2018/005070 JP2018005070W WO2019159255A1 WO 2019159255 A1 WO2019159255 A1 WO 2019159255A1 JP 2018005070 W JP2018005070 W JP 2018005070W WO 2019159255 A1 WO2019159255 A1 WO 2019159255A1
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WIPO (PCT)
Prior art keywords
tab
wire
receiving surface
line
pressing
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Application number
PCT/JP2018/005070
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English (en)
Japanese (ja)
Inventor
洋介 井上
裕樹 長谷川
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三菱電機株式会社
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Filing date
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2019571858A priority Critical patent/JPWO2019159255A1/ja
Priority to PCT/JP2018/005070 priority patent/WO2019159255A1/fr
Publication of WO2019159255A1 publication Critical patent/WO2019159255A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • 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

  • This invention relates to the manufacturing method of the solar cell module which connects photovoltaic cells using a tab wire.
  • a solar cell having an impurity diffusion layer has, for example, a p-type silicon substrate as a base material, and an uneven shape for increasing the light collection rate is formed on the light receiving surface side of the p-type silicon substrate.
  • An antireflection film made of a silicon nitride film is formed.
  • a grid electrode and a bus electrode are formed on the antireflection film as a collecting electrode for collecting electrons photoelectrically converted by the solar battery cell.
  • a back collector electrode and a back junction electrode are often formed on the back side of the p-type silicon substrate as a collector electrode.
  • the back surface collecting electrode is provided for forming a back surface field layer (BSF) for improving the open circuit voltage and the short circuit current, and for collecting the current on the back surface side.
  • BSF back surface field layer
  • the back junction electrode is provided to take out the holes collected by the back collector electrode and to make contact with the external electrode.
  • a wiring material called a tab wire is connected to each of the bus electrode and the back junction electrode in order to extract the electric power generated by the photoelectric conversion to the outside.
  • a plurality of solar cells are electrically connected in series or in series and parallel to form a solar cell module.
  • electrodes of different polarities in adjacent solar cells are electrically connected alternately by tab wires.
  • the tab wire As the tab wire, a metal wire whose surface is coated with solder is generally used, and the solder is heated by a heat tool and connected to the bus electrode by solder bonding. Further, when soldering by heating with a heat tool, it is necessary to fix the bus electrode and the tab wire. In recent years, the number of bus electrodes in a solar battery cell has increased, the number of solder joints between the bus electrodes and the tab wires has increased, and the possibility of defective joints also increases. For this reason, it is important to fix both of them in order to prevent poor bonding and perform reliable solder bonding.
  • Patent Document 1 discloses that a tab wire and a solar cell located at the upper part of a solar cell are fixed by a plurality of bar-shaped frame portions provided on an upper fixing member.
  • the present invention has been made in view of the above, and an object thereof is to obtain a method for manufacturing a solar cell module capable of stably soldering an electrode and a tab wire.
  • a solar cell module manufacturing method includes a light receiving surface provided on a light receiving surface in a solar cell having a light receiving surface and a back surface opposite to the light receiving surface. It is a manufacturing method of the solar cell module which connects a tab wire to a surface electrode and the back surface electrode provided in the back surface.
  • a method for manufacturing a solar cell module includes first heating a first tab wire whose surface is covered with solder, a solar cell whose light-receiving surface is facing upward, and a second tab wire whose surface is covered with solder.
  • the stacking process for laminating on the part and the tab line pressing part in which a plurality of pressing lines are stretched in parallel are placed in a state where the pressing line is in contact with the upper surface of the second tab line to receive the second tab line.
  • the force applied to one portion of the contact portion between the second tab line and the tab line pressing portion is 0.1 N or more and 0.3 N or less.
  • the plurality of pressing lines have a tension of 8.75 N or more when the center of the pressing line is pressed by 3 mm in the direction perpendicular to the extending direction of the pressing lines.
  • the tab line pressing part has 13 or more pressing lines.
  • the method for manufacturing a solar cell module according to the present invention has an effect that the electrode and the tab wire can be soldered stably.
  • the perspective view which looked at the solar cell array concerning Embodiment 1 of this invention from the light-receiving surface side The principal part perspective view which looked at the solar cell string concerning Embodiment 1 of this invention from the light-receiving surface side
  • the principal part perspective view which looked at the solar cell string concerning Embodiment 1 of this invention from the back surface side The top view which looked at the photovoltaic cell concerning Embodiment 1 of this invention from the light-receiving surface side
  • the top view which looked at the photovoltaic cell concerning Embodiment 1 of this invention from the back surface side which faced the opposite side to the light-receiving surface side The flowchart which shows the procedure of the manufacturing method of the solar cell module concerning Embodiment 1 of this invention.
  • FIG. 1 It is a schematic diagram which shows the tab wire joining process which electrically joins the light-receiving surface electrode and back surface electrode of Embodiment 1 of this invention, and a tab wire by solder joining, and the tab wire pressing part is arrange
  • Schematic diagram showing the state It is a schematic diagram which shows the tab wire joining process which electrically joins the light-receiving surface electrode and back surface electrode, and tab wire of Embodiment 1 of this invention, and is a schematic diagram which shows the state which heats a tab wire
  • the schematic cross section which shows the connection process of the horizontal tab connection area
  • the schematic cross section which shows the connection process of the tab line to the 2nd photovoltaic cell arrange
  • FIG. 1 The schematic diagram which shows the state by which the tab wire pressing part concerning Embodiment 1 of this invention was arrange
  • the figure which shows the specification of a tab wire when the total heat capacity of the tab wire joined to one solar cell in Embodiment 1 of this invention is 1.1388 [J / K].
  • the figure which shows the specification of the pressing wire which can be comprised when the total heat capacity of the tab wire joined to one photovoltaic cell in Embodiment 1 of this invention is 1.1388 [J / K].
  • FIG. 1 is a perspective view of a solar cell module 100 according to Embodiment 1 of the present invention as viewed from the light receiving surface side.
  • FIG. 2 is an exploded perspective view of the solar cell module 100 according to the first embodiment of the present invention as viewed from the light receiving surface side.
  • FIG. 3 is a cross-sectional view of main parts of the solar cell module 100 according to the first embodiment of the present invention.
  • FIG. 4 is a perspective view of the solar cell array 70 according to the first embodiment of the present invention viewed from the light receiving surface side.
  • FIG. 5 is a main part perspective view of the solar cell string 50 according to the first embodiment of the present invention as viewed from the light receiving surface side.
  • FIG. 6 is a main part perspective view of the solar cell string 50 according to the first embodiment of the present invention as seen from the back surface side.
  • FIG. 7 is a plan view of the solar battery cell 10 according to the first embodiment of the present invention as viewed from the light receiving surface side.
  • FIG. 8 is the top view which looked at the photovoltaic cell 10 concerning Embodiment 1 of this invention from the back surface side which faces the opposite side to the light-receiving surface side.
  • the light receiving surface side of the solar cell array 70 is covered with the light receiving surface side sealing material 33 and the light receiving surface protection component 31.
  • the back surface side facing the light receiving surface in the array 70 is covered with the back surface sealing material 34 and the back surface protection component 32, and the outer peripheral edge portion is surrounded by the reinforcing frame 40.
  • the solar cell array 70 is configured by joining a plurality of solar cell strings 50 electrically and mechanically in series or in parallel with horizontal tab wires 25 and output tab wires that extract the collected power. Has been.
  • the solar cell array 70 outputs power from the output tab line to the external interface via the terminal box 41.
  • the solar cell string 50 is configured by a plurality of solar cells 10 having a rectangular shape arranged adjacent to each other and electrically and mechanically connected in series by tab wires 20. ing. As shown in FIGS. 3 to 6, the plurality of solar cells 10 are connected in series in the X direction in the drawing, which is the first direction, by tab wires 20. The first direction is a connection direction of the plurality of solar cells 10 connected by the tab wire 20.
  • the solar cell 10 has a light receiving surface of a semiconductor substrate which is a first main surface of a semiconductor substrate 11 having a quadrangular shape formed of a p-type single crystal silicon substrate in which an n-type impurity diffusion layer is formed and a pn junction is formed.
  • a semiconductor substrate 11 On the 11A side, an uneven shape is formed by texture etching in order to increase the light collection rate.
  • the outer shape of the semiconductor substrate 11 has a square shape in the surface direction of the semiconductor substrate 11.
  • the n-type impurity diffusion layer is formed on the light receiving surface 11A side of the semiconductor substrate.
  • a silicon nitride film as an antireflection film is formed on the light receiving surface 11A of the semiconductor substrate. In the drawings, the uneven shape and the antireflection film are not shown.
  • a light receiving surface electrode 12 is formed on the light receiving surface 11 ⁇ / b> A side of the semiconductor substrate, and a back electrode 13 is formed on the back surface 11 ⁇ / b> B side of the semiconductor substrate that is the second main surface of the semiconductor substrate 11.
  • solar cell 10 has a square shape with a side length of about 150 mm to 160 mm, and in the first embodiment, a side length is 156 mm.
  • the semiconductor substrate 11 is not limited to a p-type single crystal silicon substrate, and an n-type single crystal silicon substrate, a polycrystalline silicon substrate, or the like can also be applied.
  • the sheet resistance of the n-type impurity diffusion layer which is the sheet resistance of the light receiving surface, is 70 ⁇ / sq. 90 ⁇ / sq.
  • the following n-type impurity diffusion layers are formed on the surface layer of the semiconductor substrate 11.
  • the width of the light-receiving surface bus electrode 12B is thinned to the same width as that of a tab line 20 described later.
  • the width of the light receiving surface bus electrode 12B is the same as the width of the tab line 20, and the tab line 20 is connected to the correct position on the light receiving surface bus electrode 12B, so that the tab line 20 protrudes from the light receiving surface bus electrode 12B. It is possible to reduce the shadow loss caused by this.
  • the light-receiving surface grid electrode 12G is an electrode for collecting photocurrent. In order to collect photocurrent while preventing the sunlight from reaching the inside of the solar battery cell 10, a plurality of thin linear electrodes are used. They are formed side by side in parallel.
  • the light receiving surface bus electrodes 12B are provided in six rows in a line along the first direction which is the connecting direction of the solar cells 10 as shown in FIG. ing. That is, the light receiving surface bus electrode 12B is provided so as to be connected to all the light receiving surface grid electrodes 12G along a direction orthogonal to the light receiving surface grid electrode 12G. That is, the light receiving surface grid electrode 12 ⁇ / b> G is arranged in a direction orthogonal to the extending direction of the tab wire 20.
  • the light-receiving surface bus electrode 12B is disposed along the extending direction of the tab wire 20.
  • FIGS. 1 and 2 show the case where the light receiving surface bus electrodes 12B are provided in two rows.
  • the light-receiving surface bus electrode 12 ⁇ / b> B is an electrode provided to be electrically connected to the tab wire 20.
  • the light-receiving surface bus electrode 12B and the light-receiving surface grid electrode 12G are formed by applying and baking a conductive paste having metal particles in a desired range.
  • the electrode 13b is formed and constitutes the back electrode 13.
  • the back surface collecting electrode 13a is an electrode provided for forming a back surface field layer (BSF) (not shown) for improving the open circuit voltage and the short circuit current, and for collecting the current on the back surface side, and the back surface of the solar battery cell. Cover almost the entire area of 10B.
  • BSF back surface field layer
  • the back junction electrode 13b is an electrode provided for taking out the holes collected by the back collector electrode 13a to the outside and making contact with the external electrode.
  • the back surface bonding electrode 13 b is an electrode provided to be electrically bonded to the tab wire 20.
  • the back surface joining electrode 13b is provided along the 1st direction which is the connection direction of the photovoltaic cell 10, similarly to the light-receiving surface bus electrode 12B. And the back surface joining electrode 13b is arrange
  • the back surface bonding electrodes 13 b of the first embodiment have six rows in a stepping stone shape over almost the entire length of the solar cells 10 along the first direction that is the connecting direction of the solar cells 10. Is provided.
  • the back surface collecting electrode 13a and the back surface bonding electrode 13b are formed by applying and baking a conductive paste having metal particles such as Al or Ag in a desired range.
  • the back surface 10 ⁇ / b> B of the other solar cell is alternately connected by six tab wires 20.
  • the tab wire 20 is a light receiving surface formed on the light receiving surface 10A of the solar cell in the adjacent solar cell 10 by soldering the back surface side connection region 23b to the back surface bonding electrode 13b formed on the back surface 10B of the solar cell.
  • the light receiving surface side connection region 23a is soldered to the bus electrode 12B.
  • the tab wire 20 connected to the light receiving surface bus electrode 12B formed on the light receiving surface 10A of the solar cell in the solar cell 10 is formed on the back surface 10B of the solar cell in the adjacent solar cell 10.
  • a plurality of solar cells 10 are connected in series by being connected to the back junction electrode 13b.
  • the back surface bonding electrode 13b is disposed at a position facing the light receiving surface bus electrode 12B with the semiconductor substrate 11 interposed therebetween. Therefore, in one solar cell 10, the back surface side connection region 23b of the tab wire 20 joined to the back surface joining electrode 13b and the light receiving surface side connection region 23a of the tab wire 20 joined to the light receiving surface bus electrode 12B are as follows. Although not all the regions, at least a part of the regions are arranged at opposing positions.
  • the tab wire 20 is provided between the light receiving surface side connection region 23a and the back surface side connection region 23b in order to connect the light receiving surface bus electrode 12B of the solar battery cell 10 and the back surface bonding electrode 13b of the adjacent solar battery cell 10.
  • the tab wire 20 as a wiring material for connecting the solar cells 10 is made of a conductor having a round cross section, and made of a metal wire of a good conductor such as copper or aluminum.
  • the surface of the tab wire 20 is coated with solder. That is, as the tab wire 20, a surface of a base material made of a metal wire such as a copper wire or an aluminum wire is subjected to solder coating.
  • FIG. 1 and FIG. 2 show a state in which two adjacent solar cells 10 are connected by two tab wires 20.
  • thermoplastic synthetic resin mainly composed of thermoplastic resin such as ethylene vinyl acetate (Ethylene-Vinyl Acetate: EVA) or polyvinyl butyral (Polyvinyl butyral: PVB) A material is preferred.
  • the light-receiving surface protection component 31 a material having translucency and excellent in moisture resistance, weather resistance, hydrolysis resistance, and insulation is used.
  • a resin material such as a fluorine-based resin sheet or a polyethylene terephthalate (PET) sheet is used.
  • the back surface protection component 32 a material excellent in moisture resistance, weather resistance, hydrolysis resistance, and insulation is used. From a resin material such as a fluororesin sheet, a polyethylene terephthalate (PET) sheet deposited with alumina or silica. A back sheet or a back film is used.
  • a resin material such as a fluororesin sheet, a polyethylene terephthalate (PET) sheet deposited with alumina or silica.
  • PET polyethylene terephthalate
  • FIG. 9 is a flowchart showing the procedure of the method for manufacturing the solar cell module 100 according to the first embodiment of the present invention.
  • step S10 the solar battery cell 10 is formed.
  • a p-type single crystal silicon substrate is used as a starting material, and a concavo-convex shape is formed by texture etching on a surface to be a light receiving surface in order to increase the light collection rate.
  • an n-type impurity diffusion layer (not shown) is formed on the light-receiving surface side of the p-type single crystal silicon substrate by diffusion to form a pn junction.
  • the sheet resistance of the n-type impurity diffusion layer which is the sheet resistance of the light receiving surface, is 70 ⁇ / sq. 90 ⁇ / sq. The following is assumed.
  • a silicon nitride film as an antireflection film is formed on the n-type impurity diffusion layer.
  • a light receiving surface electrode 12 including a light receiving surface bus electrode 12B and a light receiving surface grid electrode 12G is formed on the light receiving surface 10A of the solar battery cell by screen printing and firing.
  • the formation method of the light-receiving surface electrode 12 is not limited to screen printing and baking.
  • the back surface collecting electrode 13a and the back surface joining electrode 13b are formed in the back surface 10B of a photovoltaic cell by screen printing and baking.
  • the formation method of the photovoltaic cell 10 mentioned above is not limited, It can carry out by a well-known technique.
  • FIG. 10 is a schematic diagram showing a tab line joining step for electrically joining the light receiving surface electrode 12 and the back surface electrode 13 and the tab wire 20 of the first embodiment of the present invention by solder joining.
  • FIG. 3 is a schematic diagram showing a state where the is disposed on the solar battery cell 10.
  • FIG. 11 is a schematic diagram showing a tab line joining step for electrically joining the light receiving surface electrode 12 and the back electrode 13 and the tab wire 20 according to the first embodiment of the present invention, and shows a state in which the tab wire 20 is heated. It is a schematic diagram shown. In FIG. 10, the hot plate 141 is not shown.
  • the tab line pressing part 130 has a plurality of pressing lines 131 disposed on the tab line 20 disposed on the light receiving surface bus electrode 12 ⁇ / b> B of the solar battery cell 10, and both ends of the pressing line 131. And two holding wire holding portions 132 that hold the holding wire 131.
  • the plurality of pressing lines 131 are stretched between the two pressing line holding portions 132 at equal intervals and in parallel with the same predetermined tension.
  • One end of the pressing line 131 is fixed to one pressing line holding part 132.
  • the other end of the pressing wire 131 is connected to a tension adjusting screw (not shown) attached to the other pressing wire holding portion 132.
  • the tension of the holding wire 131 can be adjusted by turning a tension adjusting screw.
  • the tab line pressing part 130 is placed on the tab line 20, and the tab line 20 is pressed and fixed to the solar cell 10 side by the weight of the tab line pressing part 130.
  • the back surface side connection region 23b of the tab wire 20 is overlapped with the back surface bonding electrode 13b of the solar battery cell 10, and the light reception on the tab wire 20 is received on the light receiving surface bus electrode 12B of the adjacent solar battery cell 10 (not shown).
  • the surface side connection region 23a is overlaid. Then, the tab plate 20 on the back surface side is heated from the back surface side by the hot plate 141 which is the first heating portion and the heating portion on the back surface side, and the heat tool which is the second heating portion and the heating portion on the light receiving surface side.
  • the tab wire 20 on the light-receiving surface side is heated from the light-receiving surface side at 200, so that the electrical connection and mechanical connection between the tab wire 20 and the back surface bonding electrode 13b, and the electrical connection between the tab wire 20 and the light-receiving surface bus electrode 12B. And mechanical connection are obtained simultaneously.
  • the solder coated on the surface of the tab wire 20 is melted.
  • the tab wire 20 is cooled to solidify the solder, whereby the tab wire 20 and the light-receiving surface bus electrode 12B are soldered via solder, and the tab wire 20 and the back surface joining electrode 13b are soldered via solder. Be joined.
  • the heat tool 200 an air heater or a lamp heater can be used.
  • step S20 the tab wire 20 on the back surface side that is solder-bonded to the back surface bonding electrode 13b of the solar cell 10, the solar cell 10 with the light receiving surface facing upward, and the solar cell.
  • step S30 the tab line pressing portion 130 in which a plurality of pressing lines 131 are stretched in parallel is placed in a state where the pressing lines 131 are in contact with the upper surface of the tab line 20 on the back surface side.
  • a tab line fixing step of fixing the tab line 20 to the light receiving surface bus electrode 12B is performed.
  • step S40 the tab wire 20 on the back surface side is heated by the first heating unit, and the tab line 20 on the light receiving surface side is heated from the light receiving surface side by the second heating unit disposed on the light receiving surface side.
  • a process is performed.
  • the solder coated on the tab wire 20 is melted by heating and then solidified.
  • the solder bonding of the back surface bonding electrode 13b of the solar battery cell 10 and the tab wire 20 on the back surface side, and the solder bonding of the light receiving surface bus electrode 12B of the solar battery cell 10 and the tab wire 20 on the light receiving surface side are performed,
  • the tab wire 20 is electrically and mechanically connected to the solar battery cell 10.
  • FIG. 12 is a schematic cross-sectional view showing a step of connecting the tab line to the first solar cell 111 arranged closest to the horizontal tab line 25 in the solar cell string 50 according to the first embodiment.
  • the upper side is the light receiving surface side of the solar battery cell 10.
  • maintenance part 153,154 is arrange
  • the first solar battery cell 111 is the solar battery cell 10 closest to the horizontal tab wire 25 in the solar battery string 50.
  • the 1st photovoltaic cell 111 is arrange
  • the back surface bonding electrode 13 b of the first solar battery cell 111 is aligned with the second tab line 122.
  • maintenance parts 151 and 152 at both ends is arrange
  • the first tab wire 121 is aligned with the light receiving surface bus electrode 12 ⁇ / b> B of the first solar battery cell 111.
  • the second tab line 122 is the tab line 20 connected to the light receiving surface side of the first solar cell 111. That is, the second tab line 122 is a light receiving surface side tab line for the first solar battery cell 111.
  • the second tab line 122 has a length of the solar cell 10 in the extending direction of the second tab line 122, a length in the extending direction of the second tab line 122 of the horizontal tab connecting region for connecting the horizontal tab line 25, and
  • the length of the tab line holding portions 151 and 152 in the extending direction of the second tab line 122 is cut to a total length.
  • the bar-shaped tab line holding portions 151 and 152 disposed at both ends of the second tab line 122 are arranged in parallel with the plurality of second tab lines 122 at equal intervals and in correspondence with the positions of the light receiving surface bus electrodes 12B. Hold on.
  • the number of the second tab lines 122 is six.
  • the first tab line 121 is a tab line 20 connected to the back side of the first solar cell 111. That is, the first tab line 121 is a back-side tab line for the first solar cell 111.
  • the first tab line 121 is twice the length of the solar battery cell 10, the length between the solar battery cells 10 arranged adjacent to each other in the solar battery string 50, and the extension direction of the first tab wire 121.
  • the tab line holding portions 153 and 154 are cut to a total length.
  • the rod-like tab line holding portions 153 and 154 arranged at both ends of the first tab line 121 are arranged in such a manner that the plurality of first tab lines 121 are arranged at equal intervals and in parallel, corresponding to the positions of the back surface bonding electrodes 13b. Hold.
  • the tab line pressing portion 130 is placed on the second tab line 122.
  • the tab wire pressing portion 130 is placed in an arrangement in which the extending direction of the second tab wire 122 and the extending direction of the pressing wire 131 are orthogonal to each other. .
  • the tab line pressing part 130 presses and fixes the second tab line 122 to the hot plate 141 side by the weight of the tab line pressing part 130. That is, the tab line pressing part 130 fixes the second tab line 122 to the light-receiving surface bus electrode 12B and the first tab line 121 to the back surface bonding electrode 13b by pressing the second tab line 122 with the pressing line 131. To do.
  • the first tab line 121 and the second tab line 122 and the first solar cell 111 are connected to the first solar cell by the hot plate 141. While heating from the back surface side of the cell 111, the second tab wire 122 and the first solar cell 111 are heated from the light receiving surface side of the first solar cell 111 by the heat tool 200, which is the second heating unit.
  • the 1 tab line 121 and the 2nd tab line 122, and the 1st photovoltaic cell 111 are joined.
  • the second tab line 122 and the first tab line 121 are connected to the solar cell by soldering the first tab line 121 and the back surface bonding electrode 13b, and the second tab line 122 and the light receiving surface bus electrode 12B. Electrically and mechanically connected to the cell 10.
  • FIG. 13 is a schematic cross-sectional view illustrating a connection process between the horizontal tab connection region of the second tab line 122 and the horizontal tab line 25 according to the first embodiment.
  • the upper side is the light receiving surface side of the solar battery cell 10.
  • the horizontal tab lines 25 are soldered to the horizontal tab connection areas of the second tab lines 122 in a state where the horizontal tab lines 25 are orthogonal to the second tab lines 122.
  • a plurality of second tab lines 122 connected to the first solar cells 111 are connected in parallel by the horizontal tab lines 25.
  • the tab line holding portion 151 is released.
  • FIG. 14 is a schematic cross-sectional view showing a tab line connecting step to the second solar cell 112 arranged second from the horizontal tab line 25 side in the solar cell string 50 according to the first embodiment. .
  • the upper side is the light receiving surface side of the solar battery cell 10.
  • the third tab line 123 having both ends held by the tab line holding portions 155 and 156 is disposed on the hot plate 141.
  • the 2nd photovoltaic cell 112 is the photovoltaic cell 10 arrange
  • the second solar battery cell 112 is arranged on the third tab line 123 with the light receiving surface side facing upward.
  • the back surface bonding electrode 13 b of the second solar battery cell 112 is aligned with the third tab line 123.
  • the other end side of the first tab wire 121 whose end portion is held by the tab wire holding portion 154 is arranged on the second solar battery cell 112.
  • the first tab wire 121 is aligned with the light receiving surface bus electrode 12B of the second solar battery cell 112.
  • the first tab wire 121 is arranged on the light receiving surface side of the second solar cell 112 with one end side fixed to the back surface side of the first solar cell 111 and the other end side held by the tab wire holding part 154.
  • the third tab line 123 is the tab line 20 connected to the back side of the second solar cell 112. That is, the third tab line 123 is a back-side tab line for the second solar battery cell 112.
  • the third tab wire 123 has a length twice as long as the solar cell 10, a length between the solar cells 10 arranged adjacent to each other, and a tab line holding portion 155 in the extending direction of the third tab wire 123. , 156 and the combined length.
  • the rod-like tab line holding portions 155 and 156 arranged at both ends of the third tab line 123 are arranged in parallel with the plurality of third tab lines 123 at regular intervals corresponding to the positions of the light receiving surface bus electrodes 12B. Hold on.
  • the tab line pressing portion 130 is placed on the first tab line 121.
  • the tab wire pressing portion 130 is placed in an arrangement in which the extending direction of the first tab wire 121 and the extending direction of the pressing wire 131 are orthogonal to each other. .
  • the tab line pressing part 130 presses and fixes the first tab line 121 to the hot plate 141 side by the weight of the tab line pressing part 130. That is, the tab line pressing part 130 fixes the first tab line 121 to the light-receiving surface bus electrode 12B and the third tab line 123 to the back surface bonding electrode 13b by pressing the first tab line 121 with the pressing line 131. To do.
  • the third tab line 123 and the second solar battery cell 112 are connected to the second solar battery by the hot plate 141.
  • the third tab wire 123 and the second solar cell 112 are heated.
  • the 1 tab line 121 and the 2nd photovoltaic cell 112 are joined.
  • the third tab line 123 and the back surface bonding electrode 13b are solder-bonded, and the first tab line 121 and the light-receiving surface bus electrode 12B are solder-bonded to connect the third tab line 123 and the first tab line 121 to the second. Electrically and mechanically connected to the solar cell 112.
  • tab line holding parts 154 and 155 are opened.
  • a solar cell string 50 in which a predetermined number of solar cells 10 are electrically connected in series by a plurality of parallel tab wires 20 is configured.
  • the tab line 20 and the light-receiving surface grid electrode 12G are used as a solar cell using the solar cell in which the light-receiving surface bus electrode 12B does not exist on the light-receiving surface side and only the light-receiving surface grid electrode 12G is formed. You may connect.
  • the solar cell array 70 is formed by connecting the some solar cell string 50 obtained by the above with the horizontal tab wire
  • FIG. The solar cell array 70 is formed by connecting a plurality of solar cell strings 50 arranged in parallel using a bus bar as a horizontal tab line 25 and installing a bus bar as an output tab line for extracting power. .
  • Patent Document 1 a step of fixing a plurality of first wiring members to a jig and forming a combined body of the first wiring members and the jig when the bus electrode and the tab wire are fixed and soldered together.
  • the tab wire 20 and the solar battery cell are fixed by the tab wire pressing portion 130 before heating by the hot plate 141 and the heat tool 200. That is, in the tab line joining step according to the first embodiment, the tab line pressing part 130 is fixed to the solar cell 10 by the step of placing the tab line pressing part 130 on the second tab line 122 and the tab line pressing part 130. Heating the first tab line 121 and the second tab line 122, and the first solar cell 111, and soldering the first tab line 121 and the second tab line 122 to the first solar cell 111; The step of removing the tab line pressing portion 130 from the first tab line 121 is performed.
  • the first tab wire 121 and the second tab wire 122 can be connected to the solar cell 10 in three steps, and the first tab wire 121 is formed in a small number of steps.
  • the second tab wire 122 can be connected to the solar battery cell 10.
  • step S50 the light receiving surface side sealing member 33 and the light receiving surface protection component 31 are disposed on the light receiving surface side of the solar cell array 70 in the arrangement shown in FIG.
  • the back surface side sealing material 34 and the back surface protection component 32 are arranged to form a laminate.
  • step S60 the laminate is mounted on a laminating apparatus, and heat treatment and laminating treatment are performed at a temperature of 140 ° C. or higher and 160 ° C. or lower for about 30 minutes, for example.
  • the laminating process the solar cell array 70 and the light receiving surface protection component 31 are bonded by the light receiving surface side sealing material 33, and the solar cell array 70 and the back surface protection component 32 are bonded by the back surface side sealing material 34.
  • the structure part of a laminated body is integrated and the solar cell module 100 is obtained.
  • the back junction electrode 13b is provided in a stepping stone shape over almost the entire length of the solar battery cell 10 along the first direction.
  • the back junction electrode 13b is provided in the first direction. May be provided continuously in the form of a strip, that is, in a line, over substantially the entire length of the solar battery cell 10.
  • FIG. 15 is a diagram illustrating a result of examination on the condition of the holding line 131 of the tab line holding unit 130 according to the first embodiment.
  • the heat capacity of the tab wire 20 and the heat capacity of the presser wire 131 which are considered as control factors for controlling the solderability between the light receiving surface bus electrode 12 ⁇ / b> B and the tab wire 20 using the tab wire presser 130 described above.
  • FIG. 16 is a diagram showing specific gravity and specific heat, which are physical property values of the material of the tab wire 20 and the holding wire 131, used for calculating the heat capacity in FIG.
  • the conditions of the tab line 20 are the same in the specifications 1 to 5 as shown in FIG. Therefore, in the specifications 1 to 5, the total heat capacity of the tab wire 20 is the same.
  • the tab wire 20 was made into the form arrange
  • FIG. Therefore, in FIG. 15, the number of tab wires is described as eight, but the tab wires 20 on which the solder joint property was evaluated are four connected to the light-receiving surface bus electrode 12B.
  • the condition of the pressing line 131 is changed in the specifications 1 to 5 by changing the material of the pressing line 131, the wire diameter of the pressing line 131, and the number of the pressing lines 131 in the tab line pressing portion 130.
  • the presser line tension condition was set to a low strength in the specifications 1 and 2, where the strength of the tension was relatively weak. Further, in the specifications 3 to 5, the pressing wire tension condition was set to a strong strength with a relatively strong tension strength.
  • the holding line tension is defined as the tension of the holding line 131 when the center portion in the extending direction of the holding line 131 is pressed by 3 mm in the direction perpendicular to the extending direction of the holding line 131.
  • the number of pressing lines 131 in the tab line pressing portion 130 is six or thirteen. In FIG.
  • the average value of the holding line tensions of all the holding lines 131 in the tab line holding part 130 in each specification that is, the average value of the holding line tensions of the six or 13 holding lines 131 in the tab line holding part 130 is represented by Ave.
  • Ave the maximum value of the holding line tension of the 6 or 13 holding lines 131 in the tab line holding part 130
  • Max [N] the maximum value of the holding line tension of the 6 or 13 holding lines 131 in the tab line holding part 130
  • Min [N] The minimum value of the pressing wire tension
  • the own weight of the tab wire pressing portion 130 including the six or thirteen pressing wires 131 is 1.13 [kg]. That is, the total weight of the tab wire pressing portion 130 including the six or thirteen pressing wires 131 and the pressing wire holding portion 132 in the specifications 1 to 5 is 1.13 [kg].
  • Solder bondability was determined by the peel strength of the tab wire 20 connected to the light-receiving surface bus electrode 12B.
  • the tab wire 20 is divided into five regions in the length direction, and the tab wire 20 is peeled off when the tab wire 20 is peeled from the one end side of the tab wire 20 by one region in a direction perpendicular to the in-plane direction of the semiconductor substrate 11. The strength was measured. Therefore, the peel strength was measured at 5 points per tab line.
  • specifications 1 to 3 experiments were performed on two solar cells 10 as described in FIG. 15 as the number of cells.
  • For specification 4 and specification 5 experiments were performed on three solar cells 10 as described in FIG. 15 as the number of cells.
  • the average value of the peel strength in each specification is indicated by Ave [N]. Further, in FIG. 15, there is an unjoined portion where the light-receiving surface bus electrode 12 ⁇ / b> B and the tab wire 20 are not soldered, and soldering between the light-receiving surface bus electrode 12 ⁇ / b> B and the tab wire 20 is realized. The case where it was not possible is indicated as “less than 0.19 [N]”.
  • the determination of the solderability is reliable between the light-receiving surface bus electrode 12 ⁇ / b> B and the tab wire 20 when a peel strength equal to or greater than the force corresponding to the weight of one solar cell 10 is obtained. It is determined that the solder joint can be realized, and the determination is “OK” in FIG. That is, in FIG. 15, the determination is “OK” when a peel strength of 0.19 [N] or more is obtained. When the peel strength greater than the force corresponding to the weight of one solar cell 10 is not obtained, it is determined that the solder joint between the light receiving surface bus electrode 12B and the tab wire 20 is not realized. In FIG. 15, the determination is indicated as “NG”. That is, in FIG. 15, the determination is “NG” when the peel strength of 0.19 [N] or more is not obtained. In this case, the tab wire 20 is not joined to the light receiving surface bus electrode 12B.
  • the holding line tension of the holding line 131 that realizes solder bonding between the light receiving surface bus electrode 12B and the tab line 20 and obtains a tab line peeling strength of a predetermined level or higher is an average value: 9.75 [N ], Standard deviation ⁇ : 0.7 [N], maximum value: 10.86 [N], and minimum value: 8.75 [N].
  • the number of pressing lines 131 in the tab line pressing portion 130 is large. In the inventor's verification, it can be said that 13 or more are necessary from FIG.
  • the necessary condition for obtaining the solder joint that can securely fix the light-receiving surface bus electrode 12B and the tab wire 20 by the solder joint is the minimum value when the holding line tension is at least a high tension of 8.75 [N ], It can be said that the number of pressing lines is at least 13.
  • the force applied from the tab line pressing portion 130 to one place of the contact portion between the tab line 20 and the tab line pressing portion 130, that is, the force applied to one position of the contact portion between the tab line 20 and the pressing line 131 is , 0.1 [N] or more and 0.3 [N] or less.
  • the force applied to one portion of the contact portion between the tab wire 20 and the tab wire pressing portion 130 is more preferably 0.2 [N] which is the median value of the above range.
  • the number of light receiving surface bus electrodes 12B is four, the number of pressing wires 131 is 13, and the force applied to one portion of the contact portion between the tab wire 20 and the tab wire pressing portion 130 is 0.2 [N].
  • the number of light receiving surface bus electrodes 12B is six, the number of pressing wires 131 is 13, and the force applied to one portion of the contact portion between the tab wire 20 and the tab wire pressing portion 130 is 0.2 [N].
  • the tab wire holding portion 130 having 13 holding wires 131 and having its own weight of 1.13 [kg] is used for the solar battery cell 10 of four buses
  • the tab wire 20 and the tab wire holding portion are used.
  • the solar cell 10 with four buses is provided with four light receiving surface bus electrodes on the light receiving surface side, and four back surface bonding electrodes 13b in a stepping stone shape or a line shape on the back surface side.
  • the necessary tension to be applied to the holding wire 131 in advance is a pressing wire tension of 8.75 [N] or more as described above.
  • the holding wire tension is the tension of the holding wire 131 when the center portion in the extending direction of the holding wire 131 is pressed by 3 mm in the direction perpendicular to the extending direction of the holding wire 131.
  • FIG. 17 is a schematic diagram showing a state in which the tab wire pressing portion 130 according to the first embodiment of the present invention is arranged on the solar battery cell 10.
  • FIG. 17 it has shown about the half area
  • the thickness of the upper tab wire 161 arranged on the upper side of the solar battery cell 10 and the lower tab wire 162 arranged on the lower side of the solar battery cell 10 is 0.3 mm.
  • the distance L between the surface of the solar battery cell 10 and the pressing line 131 that is, the distance between the upper surface of the solar battery cell 10 and the pressing line 131 in a state where the pressing line 131 is in contact with the surface of the upper tab line 161 is 0.3 mm.
  • the upper side of the solar battery cell 10 is the light receiving surface side of the solar battery cell 10.
  • the lower side of the solar battery cell 10 is the back side of the solar battery cell 10.
  • the pressing line 131 does not touch the solar battery cell 10 when the tab is pressed, that is, when the tab line pressing part 130 presses the upper tab line 161. It is necessary to. For this reason, when the tab is pressed, the pressing amount of the portion of the pressing wire 131 that is not in contact with the upper tab wire 161 toward the solar cell 10 needs to be equal to or less than the thickness of the upper tab wire 161. In FIG. 17, it is necessary to be less than 0.3 mm.
  • the necessary tension condition to be applied to the holding wire 131 in advance is the tension of the holding wire 131 when the center portion in the extending direction of the holding wire 131 is pushed 3 mm in the direction perpendicular to the extending direction of the holding wire 131.
  • a certain pressing line tension is 8.75 [N] or more.
  • the deformation of the holding wire 131 in the tab wire joining process is considered to be deformation in the elastic region.
  • Load per book A load per press line applied to all tab lines when the press line is pressed by the thickness of the tab line pressed by the press line.
  • the pressing load is a force with which the tab line pressing part 130 presses the solar battery cell 10 with all the upper tab lines 161, that is, a force with which the upper tab line 161 is pressed with all the pressing lines 131.
  • the conditions of the tab wire 20 are the same in the specifications 1 to 5, and the tab width is 1.0 mm, the tab thickness is 0.25 mm, and the solder plating thickness is 0.025 mm.
  • the solder plating thickness is the thickness of the solder plated on the surface of the copper rectangular wire, and is the thickness of the solder plated on the surface facing the light-receiving surface bus electrode 12B.
  • the material of the pressing wire 131 is any one of stainless steel (SUS), tungsten, and molybdenum in the specifications 1 to 5.
  • the presser wire diameter was 0.3 mm or 0.5 mm in the specifications 1 to 5.
  • the length of the holding wire 131 was unified to 160 mm in the specifications 1 to 5.
  • the number of the holding wires 131 was 6 or 13 in the specifications 1 to 5.
  • the calculation of the heat capacity of the tab wire 20 and the holding wire 131 was obtained by the following equation: cross-sectional area ⁇ length ⁇ number ⁇ specific gravity ⁇ specific heat [J / K].
  • the physical properties shown in FIG. 16 were used for calculating the heat capacities of the tab wire 20 and the holding wire 131.
  • the tab wire 20 is formed by plating Sn—Ag—Cu solder (SAC solder) on the surface of a rectangular copper wire.
  • the total heat capacity of the tab wire 20 in each specification is 1.1388 [J / K].
  • the total heat capacity of the tab wire 20 is the sum of the heat capacities of the eight tab wires 20 arranged on the light receiving surface side and the back surface side of one solar battery cell 10.
  • the total heat capacity of the holding wire 131 capable of realizing reliable solder bonding is in the range of 0.3802 [J / K] to 1.0623 [J / K].
  • the total heat capacity of the pressing wire 131 is the sum of the heat capacities of the six or thirteen pressing wires 131 provided in one tab wire pressing portion 130.
  • the heat capacity of the holding wire 131 that presses the tab wire 20 is larger for solder bonding. Therefore, it can be said that the condition of the total heat capacity of the presser wire 131 that can be soldered is 1.0623 or less, that is, the total heat capacity of the presser wire 131 ⁇ 1.0623. However, this is a case where the total heat capacity of the tab wire 20 is 1.1388 [J / K].
  • the relationship between the total heat capacity of the tab wire 20 and the total heat capacity of the presser wire 131 that can be soldered is a ratio of the total heat capacity (total heat capacity of the press wire) / (total heat capacity of the tab wire). Is 0.93 or less, that is, (total heat capacity of pressing wire) / (total heat capacity of tab wire) ⁇ 0.93.
  • the specification of the actual tab line 20 will be discussed. From the relationship of the total heat capacity of the tab wire to the total heat capacity of the solder wire that can be soldered, the total heat capacity of the press wire that can be soldered depends on the total heat capacity of the tab wire 20. However, when the total heat capacity of the tab wire 20 is increased, the heating amount at the time of solder joining by heating the tab wire 20 by the heat tool 200 must be increased. Moreover, when the total heat capacity of the tab wire 20 is lowered, the amount of material used in the tab wire 20 is reduced. In this case, since the volume of the tab wire 20 is reduced, the cross-sectional area of the tab wire 20 is reduced, and the electrical resistance at the tab wire 20 is increased, so that the output loss of the solar battery cell 10 is increased.
  • the shape and number of the tab wires 20 can be defined by fixing the total heat capacity of the tab wires 20 joined to one solar battery cell 10 at 1.1388 [J / K] as described above.
  • FIG. 18 shows the specification of the tab wire 20 when the total heat capacity of the tab wire 20 joined to one solar battery cell 10 is 1.1388 [J / K] in the first embodiment of the present invention.
  • the total heat capacity of the tab wire 20 is strictly adjusted to 1.1388 [J / K], the number of decimal places cannot be managed. Therefore, the total heat capacity of the tab wire 20 is actually 1.1388 [J / K]. It was calculated so as to be a value very close to.
  • the shape and number of tab wires 20 are as follows. Note that the length of the tab wire 20 is 150 mm.
  • the above specifications are the specifications of the tab wire 20 that can be configured when the total heat capacity of the tab wire 20 is 1.1388 [J / K]. Therefore, the number of tab wires 20 is not limited as long as the total heat capacity of the tab wires 20 can be 1.1388 [J / K]. However, in order to reduce output loss at the time of taking out electric power from the solar battery cell 10, it is preferable that a plurality of tab wires 20 are connected to the light receiving surface side and the back surface side of the solar battery cell 10, respectively.
  • FIG. 19 shows a configurable holding wire 131 when the total heat capacity of the tab wire 20 bonded to one solar cell 10 in the first embodiment of the present invention is 1.1388 [J / K].
  • FIG. 19 In the following, among the specifications of the configurable holding line 131 shown in FIG. 19, the specification of the holding line 131 capable of ensuring solderability between the light receiving surface bus electrode 12 ⁇ / b> B and the tab line 20 is shown.
  • FIG. 20 is a perspective view showing another tab line pressing portion 230 according to the first embodiment.
  • the other tab line pressing part 230 includes a frame-shaped pressing line holding part 231 provided with an opening 233, a plurality of pressing lines 131, and a pressing line fixing part 232 that fixes the pressing line 131.
  • the photovoltaic cell 10 is arrange
  • the frame-shaped pressing line holding portion 231 has a square shape in which the inner width of the frame shape, that is, the outer width of the opening 233 is about 10 mm larger than the outer width of the solar battery cell 10.
  • the holding wire fixing portion 232 is a screw, and the holding wire 131 is wound around the screw tightening direction and tightened to fix the holding wire 131 to the frame-shaped holding wire holding portion 231. The tension of the holding wire 131 can be adjusted by adjusting the tightening of the screw.
  • the presser line holding part 132 By making the presser line holding part 132 into a frame shape, it is possible to keep the intervals between the plurality of presser lines 131 constant and to keep the plurality of presser lines 131 in parallel. In addition, since both ends of the pressing wire 131 are fixed, the tension of the pressing wire can be adjusted by tightening the screw.
  • the tab wire pressing portion 130 in the tab wire joining step, is in a state where the pressing wire 131 is in contact with the upper surface of the tab wire 20 on the back surface side.
  • the condition of the tab line pressing portion 130 is that the force applied from the tab line pressing portion 130 to one portion of the contact portion between the tab line 20 and the tab line pressing portion 130, that is, the tab line 20 and the pressing line 131.
  • the force applied to one part of the contact portion is 0.1 [N] or more and 0.3 [N] or less.
  • vertical direction with respect to the extension direction of the holding line 131 is more than 8.75 [N].
  • the tab line pressing portion 130 has 13 or more pressing lines 131.
  • the solder bonding between the light-receiving surface bus electrode 12B and the tab wire 20 is reliably and less performed by performing the tab wire bonding process under the above conditions. It can be realized in the process.
  • the electrodes and the tab wires of the solar cell can be soldered stably and with fewer steps. Can be joined.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

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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

L'invention concerne un procédé de fabrication d'un module de cellules solaires comprenant une étape de stratification dans laquelle les éléments suivants sont stratifiés sur une première unité de chauffage : des premiers fils de languette, dont les surfaces sont recouvertes de soudure ; une cellule solaire (10), une surface de réception de lumière dont les surfaces ont été orientées vers le haut ; et des seconds fils de languette dont les surfaces sont recouvertes de soudure. Le procédé comprend également : une étape de fixation dans laquelle une unité de pression à fils de languette (130), comprenant une pluralité de fils de pression (131) étirés en parallèle, est placée avec les fils de pression (131) en contact avec des surfaces supérieures des seconds fils de languette pour fixer les seconds fils de languette à des électrodes de surface de réception de lumière ; et une étape de chauffage dans laquelle les premiers fils de languette sont chauffés par la première unité de chauffage et les seconds fils de languette sont chauffés depuis le côté de surface de réception de lumière par une seconde unité de chauffage disposée sur le côté de surface de réception de lumière. La force agissant sur une zone de contact entre les seconds fils de languette et l'unité de pression à fils de languette (130) est de 0,1 à 0,3 N. La tension d'un fil de pression (131) lorsque le centre de celui-ci est pressé de 3 mm dans une direction perpendiculaire à la direction d'extension du fil de pression est d'au moins 8,75 N. De plus, au moins treize fils de pression (131) sont étirés dans l'unité de pression à fils de languette (130).
PCT/JP2018/005070 2018-02-14 2018-02-14 Procédé de fabrication de module de cellules solaires WO2019159255A1 (fr)

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CN110992321A (zh) * 2019-11-22 2020-04-10 广州大学 一种太阳电池片栅线提取方法
CN114310075A (zh) * 2022-03-03 2022-04-12 浙江爱旭太阳能科技有限公司 一种太阳能电池焊接方法、电池串、电池组件和焊接设备

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JP2009260202A (ja) * 2008-03-25 2009-11-05 Eco & Engineering Co Ltd 太陽電池素子の接続方法及び接続装置、並びに太陽電池素子
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JP2014232864A (ja) * 2013-04-30 2014-12-11 日立化成株式会社 太陽電池モジュールの製造方法

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JP2009059738A (ja) * 2007-08-29 2009-03-19 Kyocera Corp 太陽電池モジュールの製造方法及び製造装置
JP2009260202A (ja) * 2008-03-25 2009-11-05 Eco & Engineering Co Ltd 太陽電池素子の接続方法及び接続装置、並びに太陽電池素子
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CN110992321A (zh) * 2019-11-22 2020-04-10 广州大学 一种太阳电池片栅线提取方法
CN110992321B (zh) * 2019-11-22 2023-05-09 广州大学 一种太阳电池片栅线提取方法
CN114310075A (zh) * 2022-03-03 2022-04-12 浙江爱旭太阳能科技有限公司 一种太阳能电池焊接方法、电池串、电池组件和焊接设备
CN114310075B (zh) * 2022-03-03 2022-06-21 浙江爱旭太阳能科技有限公司 一种太阳能电池焊接方法、电池串、电池组件和焊接设备
US11728454B1 (en) 2022-03-03 2023-08-15 Solarlab Aiko Europe Gmbh Method for soldering solar cell, cell string, photovoltaic module, and soldering device

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