WO2011055634A1 - 薄膜太陽電池モジュールおよびその製造方法 - Google Patents
薄膜太陽電池モジュールおよびその製造方法 Download PDFInfo
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- WO2011055634A1 WO2011055634A1 PCT/JP2010/068516 JP2010068516W WO2011055634A1 WO 2011055634 A1 WO2011055634 A1 WO 2011055634A1 JP 2010068516 W JP2010068516 W JP 2010068516W WO 2011055634 A1 WO2011055634 A1 WO 2011055634A1
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- film solar
- conductive member
- solar cell
- thin film
- bus bar
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Images
Classifications
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- H—ELECTRICITY
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- 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
- H01L31/0508—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 the interconnection means having a particular shape
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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
- H01L31/02—Details
- H01L31/02002—Arrangements for conducting electric current to or from the device in operations
- H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
- H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
- H01L31/0201—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising specially adapted module bus-bar structures
-
- 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
- H01L31/02—Details
- H01L31/02002—Arrangements for conducting electric current to or from the device in operations
- H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
- H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
- H01L31/02013—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising output lead wires elements
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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
- H01L31/0445—PV modules or arrays of single PV cells including thin film solar cells, e.g. single thin film a-Si, CIS or CdTe solar cells
- H01L31/046—PV modules composed of a plurality of thin film solar cells deposited on the same substrate
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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
- H01L31/0445—PV modules or arrays of single PV cells including thin film solar cells, e.g. single thin film a-Si, CIS or CdTe solar cells
- H01L31/046—PV modules composed of a plurality of thin film solar cells deposited on the same substrate
- H01L31/0465—PV modules composed of a plurality of thin film solar cells deposited on the same substrate comprising particular structures for the electrical interconnection of adjacent PV cells in the module
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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
- H01L31/048—Encapsulation of modules
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10T29/00—Metal working
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- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49355—Solar energy device making
Definitions
- the present invention relates to a thin film solar cell module and a manufacturing method thereof.
- a thin-film solar cell module using amorphous silicon or the like as a power generation layer is configured by connecting a plurality of thin-film solar cells.
- a thin film solar cell is formed in a strip shape by sequentially laminating a transparent electrode film, a photoelectric conversion layer, and a back electrode on a translucent substrate.
- a thin film solar cell device in which a plurality of thin film solar cells are connected in series is formed by connecting one transparent electrode film and the other back electrode between adjacent thin film solar cells. In such a thin film solar cell device, current collecting wiring called bus bar wiring is formed at the end of the thin film solar cell at one end and the end of the thin film solar cell at the other end.
- Patent Document 1 proposes a technique of a thin-film solar cell module including a positive electrode current collector and a negative electrode current collector that are bus bar wiring.
- the positive electrode current collector is bonded to the entire surface of the P-type electrode terminal portion, and the negative electrode current collector is bonded to the entire surface of the N-type electrode terminal portion using soldering or conductive paste.
- the P-type electrode terminal portion and the N-type electrode terminal portion are electrode extraction portions having a linear shape that is substantially the same length as the thin-film solar battery cell.
- Patent Document 2 proposes a technique of a thin film solar cell module including an interconnector provided with an uneven portion in advance. In heating and cooling in the manufacturing process of the thin film solar cell module, the compressive stress applied to the semiconductor substrate is reduced by causing expansion and contraction along the uneven direction of the interconnector. By reducing the compressive stress, occurrence of warpage of the semiconductor substrate and peeling of the joint portion between the interconnector and the collector electrode is suppressed.
- the interconnect material for connecting the crystalline solar cell elements and the wiring material used for the bus bar wiring of the thin film solar cell are meandering and twisted during production.
- the wiring material in which meandering or twisting is used as it is as the wiring
- the interconnector has a shadow on the light receiving surface of the solar cell element. It becomes.
- the bus bar wiring protrudes from the wiring formation region, so that it enters the cell portion of the solar cell and causes a short circuit. In any of these cases, there is a possibility of causing a problem of reduction in power generation efficiency of the solar cell.
- a mechanism for pulling a wiring material is provided in an apparatus for forming an interconnector, and the bending of the wiring material is partially corrected.
- an apparatus for performing such correction can be very expensive.
- the structure may be weakened.
- the unevenness of the interconnector may be crushed in a laminating process that covers the filler and the back sheet after the interconnector is attached.
- a space is formed between the uneven peak portion of the interconnector and the collecting electrode portion, when water enters the inside of the module, the water tends to concentrate on the portion. .
- the present invention has been made in view of the above, avoids a decrease in power generation efficiency due to the influence of meandering of the wiring material, can relieve stress caused by the difference in thermal expansion coefficient between the substrate material and the wiring material, and
- An object of the present invention is to obtain a thin-film solar cell module and a method for manufacturing the same that can suppress warpage and peeling of the joint portion of the electrode and wiring.
- the present invention provides a thin film solar cell device configured by connecting a plurality of thin film solar cells in series, a positive electrode side end of the thin film solar cell device, and And a bus bar wiring provided at a negative electrode side end portion, wherein the bus bar wiring is formed by connecting a plurality of conductive members so as to overlap each other.
- the present invention it is possible to avoid a decrease in power generation efficiency due to the influence of meandering of the wiring material, to relieve stress caused by the difference in thermal expansion coefficient between the substrate material and the wiring material, and to warp the substrate and connect the electrode and the wiring Can be prevented.
- FIG. 1 is a diagram showing a schematic plan configuration of a back surface side of the thin-film solar cell module according to Embodiment 1.
- FIG. 2 is a diagram illustrating a schematic configuration of an AA cross section of the thin film solar cell module illustrated in FIG. 1.
- FIG. 3-1 is a diagram showing a schematic cross-sectional configuration in each process of a bus bar wiring forming step in the method for manufacturing a thin film solar cell module.
- FIG. 3-2 is a diagram showing a schematic cross-sectional configuration in each process of the bus bar wiring forming step in the method for manufacturing the thin film solar cell module.
- FIG. 4A is a diagram illustrating a schematic configuration on the back surface side in each process of the bus bar wiring forming process.
- FIG. 4B is a diagram illustrating a schematic configuration on the back surface side in each process of the bus bar wiring forming process.
- FIG. 5 is a diagram showing a schematic cross-sectional configuration in each process of the bus bar wiring formation step in the method for manufacturing the thin-film solar cell module according to Embodiment 2.
- FIG. 6 is a diagram for explaining a modification of the second embodiment.
- FIG. 7 is a diagram showing a schematic cross-sectional configuration in each process of the bus bar wiring forming step in the method for manufacturing the thin-film solar cell module according to Embodiment 3.
- FIG. 8 is a diagram for explaining a modification of the third embodiment.
- FIG. 9 is a diagram for explaining another modification of the third embodiment.
- FIG. 1 is a diagram showing a schematic plan configuration of the back surface side of the thin-film solar cell module according to Embodiment 1 of the present invention.
- FIG. 2 is a diagram illustrating a schematic configuration of an AA cross section of the thin film solar cell module illustrated in FIG. 1.
- the surface on which sunlight is incident is the front surface
- the surface opposite to the front surface is the back surface.
- the thin film solar cell module includes a transparent conductive film 6, a photoelectric conversion layer 7, and a back electrode 8 that are sequentially laminated on a light-transmitting substrate 1 such as glass.
- the transparent conductive film 6 is composed of a conductive transparent oxide film, for example, SnO 2 , ZnO 2 , ITO, or the like.
- the photoelectric conversion layer 7 is made of, for example, an amorphous silicon film.
- the back electrode 8 is configured using a metal such as Ag, Al, Ti, or a metal compound, and is formed with a film thickness of, for example, 1 ⁇ m or less.
- the thin-film solar battery has an elongated strip shape, and the longitudinal size substantially matches the entire width of the translucent substrate 1.
- the AA section is a section parallel to the longitudinal direction of the thin-film solar battery cell.
- the thin film solar cell device 2 is composed of a plurality of thin film solar cells arranged in parallel in a direction perpendicular to the longitudinal direction. Between adjacent thin film solar cells, one transparent conductive film 6 and the other back surface electrode 8 are connected to each other to form a thin film solar cell device 2 in which a plurality of solar cells are connected in series. .
- the bus bar wiring 3 is provided on the thin film solar cell device 2.
- the bus bar wiring 3 is a takeout electrode for taking out the electric power output from the thin film solar cell device 2, and is provided at the positive electrode side end and the negative electrode side end of the thin film solar cell device 2.
- the bus bar wiring 3 has a linear shape along the longitudinal direction of the thin-film solar battery cell.
- the bus bar wiring 3 is configured by connecting a plurality of conductive members 10.
- the conductive member 10 is formed shorter than the longitudinal size of the thin-film solar battery cell.
- a connecting portion between the conductive members 10 is configured such that a part of the other conductive member 10 is bonded to a part of one conductive member 10 via a bonding member 9.
- a portion other than the portion bonded to the other conductive member 10 is bonded to the back electrode 8 via the bonding member 9.
- the joining member 9 that joins the conductive members 10 and the joining member 9 that joins the conductive member 10 and the back electrode 8 are scattered at positions other than the end portions of the conductive member 10.
- the collecting wiring 11 is provided perpendicular to the two bus bar wirings 3.
- the collecting wiring 11 and the bus bar wiring 3 are electrically connected.
- the insulating film 12 is provided between the back electrode 8 and the collecting wiring 11.
- the insulating film 12 is provided to prevent a short circuit between the thin-film solar battery cell and the collector wiring 11.
- the filler 4 and the back sheet 5 are sequentially laminated on the thin-film solar cell device 2 on which the bus bar wiring 3 and the collecting wiring 11 are formed.
- the filler 4 and the back sheet 5 protect the back side of the thin film solar cell module.
- FIG. 1 the structure at the time of seeing through the part covered with the filler 4 and the back seat
- a portion to which the collecting wiring 11 is connected is omitted.
- the terminal end of the collecting wiring 11 is connected to a cable wire that can be externally connected inside the terminal box 13 through the filler 4 and the back sheet 5.
- the mounting interface inside the terminal box 13 is sealed for insulation as necessary.
- the wiring is made to the two-pole terminal box 13 via the collecting wiring 11 formed from the two bus bar wirings 3 that are both positive and negative, but an individual terminal box 13 may be provided for each of the positive and negative poles. .
- FIGS. 3-1 and 3-2 are diagrams showing a schematic cross-sectional configuration in each process of the bus bar wiring forming step in the method for manufacturing the thin-film solar cell module according to the present embodiment.
- FIGS. 4A and 4B are schematic views of the rear surface side plane in each process of the bus bar wiring forming process.
- the cross section shown in FIGS. 3A and 3B is the AA cross section shown in FIGS. 4A and 4B.
- a thin film solar cell device 2 in which a plurality of thin film solar cells are connected in series is formed on a light-transmitting substrate 1.
- the thin film solar cell device 2 is formed by sequentially forming a transparent conductive film 6, a photoelectric conversion layer 7, and a back electrode 8.
- the back electrode 8 is formed by, for example, vacuum deposition or reactive sputtering.
- the first conductive member is formed on the back electrode 8 of the thin-film solar cell device 2 laminated on the translucent substrate 1.
- Bonding members 9 are preliminarily scattered on the surface of the conductive member 10-1 facing the back electrode 8.
- the joining members 9 are scattered at positions other than both ends E1 and E2 of the conductive member 10-1.
- the conductive member 10-1 is bonded to the back electrode 8 through the bonding member 9.
- the joining member 9 is cured by heat treatment or the like according to the material, thereby forming an electrical connection between the conductive member 10-1 and the back electrode 8.
- the second conductive member 10-2 is attached. A part of the second conductive member 10-2 on the first end E1 ′ side is overlapped and joined to a part of the first conductive member 10-1 on the second end E2 side via the joining member 9. Is done.
- the second conductive member 10-2 is bent toward the back electrode 8 from the portion overlapped with the first conductive member 10-1. A portion of the second conductive member 10-2 that is closer to the second end E 2 ′ than the bent portion is bonded to the back electrode 8 through the bonding member 9.
- the conductive member 10 including a connecting portion in which a part of the other conductive member 10-2 is joined to a part of the one conductive member 10-1. -1, 10-2 are formed on the back electrode 8.
- the third conductive member 10-3 is attached in the same manner as the second conductive member 10-2.
- a part of the third conductive member 10-3 on the first end E1 "side is overlapped with a part of the second conductive member 10-2 on the second end E2 'side via the joining member 9.
- the portion on the second end E2 ′′ side from the bent portion is joined to the back electrode 8 via the joining member 9.
- the connecting portion of the conductive members 10-2 and 10-3 is formed on a portion of the one conductive member 10-2 on the second end E2 ′ side and on the other side.
- the conductive member 10-3 is configured by joining a part on the first end E1 "side.
- next conductive member 10 is sequentially joined over the conductive member 10 previously joined to the back electrode 8 and the back electrode 8.
- the bus bar wiring 3 in which the plurality of conductive members 10-1 to 10-n are connected is formed on the back electrode 8. .
- the filler 4 and the back sheet 5 are sequentially laid on the thin film solar cell device 2 on which the bus bar wiring 3 is formed.
- the filler 4 and the back sheet 5 are provided with an opening through which the collector wiring 11 (see FIG. 1) passes in advance, and vacuum lamination is performed with the connection portion on the terminal box 13 side of the collector wiring 11 taken out. Apply.
- the terminal box 13 is bonded on the back sheet 5, and the ends of the collecting wiring 11 are soldered to the terminals in the terminal box 13.
- the terminal box 13 and the back sheet 5 are bonded with a resin such as silicon, and the inside of the terminal box 13 is filled with the same resin material.
- the conductive member 10 is made of a flat wiring material, for example, a metal such as Au, Ag, Cu, Al, Ti, or an alloy thereof.
- the conductive member 10 may be one in which solder plating is applied to the surface of a flat wiring material.
- solder for example, solder, ACF (Anisotropic Conductive Film), conductive adhesive, or the like is used.
- solder When using solder as the joining member 9, solder is applied to one or more points on the conductive member 10. When the conductive member 10 is put on the back electrode 8, the applied solder is melted point by point to form a joint between the conductive member 10 and the back electrode 8.
- multi-point simultaneous processing may be performed by using a multi-head mass production machine.
- the film-like ACF is cut into several mm squares in advance and bonded onto the conductive member 10.
- the conductive member 10 is put on the back electrode 8, pressure and heat are simultaneously applied to the portion where the ACF is adhered, and a bonding process is performed for each point.
- the heat treatment temperature can be appropriately set according to the type of resin constituting the ACF, and is often treated at a temperature of 200 ° C. or lower.
- the conductive adhesive is applied on the conductive member 10 using a dispenser or the like.
- a heat treatment After disposing the conductive member 10 on the back electrode 8, an electrical connection between the conductive member 10 and the back electrode 8 and between the conductive members 10 is formed.
- the connecting portion may be pressurized.
- the joining member 9 is shown as one point at the connection portion between the conductive members 10 and as three points at the connection portion between the conductive member 10 and the back electrode 8. Not limited.
- the joining member 9 may be at least one point at the connection portion between the conductive members 10 and at least one point at the connection portion between the conductive member 10 and the back electrode 8, and the manner of interspersing may be appropriately changed.
- the bus bar wiring 3 can relieve stress at the bent portion of the conductive member 10 at the connection portion between the conductive members 10.
- the portion between the bonding members 9 can be deformed with a certain degree of freedom. Moreover, it is made for the edge part (end surface) of the conductive member 10 located in the thin film photovoltaic cell side among the overlapping conductive members 10 not to be joined directly with the other conductive member 10. In the end region T1 where the second end E2 of the conductive member 10-1 and the bent conductive member 10-2 face each other, the second end E2 of the conductive member 10-1 and the second end of the conductive member 10-2 The end facing E2 is not directly joined.
- the copper wire may protrude from a cell adjacent to the bus bar wiring formation region due to meandering or twisting that occurs when the copper wire is arranged.
- the bus bar wiring formation area width is 7 mm and the copper wire width is 5 mm, assuming that meandering of about 3 mm per 1 m of copper wire occurs, the bus bar wiring formed of 1 m copper wire protrudes from the formation area. It becomes.
- the bus bar wiring is configured by connecting two 0.5 m copper wires, the meandering can be suppressed to about 1.5 mm, and the bus bar wiring can be provided in the formation region.
- the bus bar wiring 3 is configured by connecting the conductive members 10 that are shorter than the longitudinal size of the thin-film solar cells, so that the influence of meandering and twisting of the conductive members 10 can be suppressed, and the efficiency is reduced due to short-circuiting. Can be avoided.
- each conductive member 10 may be 50 cm or less. The shorter the conductive member 10, the more effective the stress relaxation and the meandering and twisting suppression. Becomes bigger. Considering the processing process burden caused by shortening the conductive member 10, each conductive member 10 is preferably 5 to 30 cm long, for example.
- bus bar wiring 3 of the present embodiment is configured by connecting at least two or more conductive members 10, the effects of the present invention can be obtained.
- the bus bar wiring 3 may be connected to the positive electrode side end and the negative electrode side end, respectively, and is not limited to being directly bonded to the back electrode 8.
- the electrode pad is formed on the back electrode 8 or the front electrode along the longitudinal direction of the thin-film solar cell and the bus bar wiring 3 is joined to the electrode pad, the same effect can be obtained.
- FIG. FIG. 5 is a figure which shows the schematic cross-sectional structure in each process of a bus-bar wiring formation process among the manufacturing methods of the thin film solar cell module which concerns on Embodiment 2 of this invention.
- the present embodiment is characterized in that a plurality of conductive members 10 connected to each other in advance are joined to the thin film solar cell device 2.
- the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
- the connecting portion between the conductive members 10 is configured by joining a part of the other conductive member 10 on a part of the one conductive member 10.
- the connection body of the three conductive members 10 is joined to the back electrode 8.
- the connection body of the three conductive members 10 is sequentially connected on the back electrode 8.
- the bus bar wiring 3 to which the plurality of conductive members 10 are connected is formed on the back electrode 8 as shown in FIG.
- a thin film solar cell module similar to that of Embodiment 1 can be obtained.
- FIG. 6 is a diagram for explaining a modification of the present embodiment.
- bus bar wiring 3 that is a connected body of conductive members 10 is formed as shown in FIG. 6B.
- the formed bus bar wiring 3 is joined to the back electrode 8.
- the same thin-film solar cell module as that in Embodiment 1 can be obtained.
- FIG. FIG. 7 is a figure which shows schematic cross-sectional structure in each process of a bus-bar wiring formation process among the manufacturing methods of the thin film solar cell module which concerns on Embodiment 3 of this invention.
- the present embodiment is the same as the second embodiment in that a plurality of conductive members 10 connected in advance to each other are joined to the thin film solar cell device 2, but the connection form of the plurality of conductive members 10 is the second embodiment. And different.
- the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
- the conductive members 10 interspersed with the joining members 9 in advance are arranged so that the edge regions of the adjacent conductive members 10 in the longitudinal direction of the conductive members 10 overlap.
- the conductive member 10 is arranged in a state where the position in the height direction (position in the thickness direction of the conductive member 10) is alternately changed to two positions.
- the conductive member 10 disposed on the lower side is referred to as a conductive member 10A
- the conductive member 10 disposed on the upper side in FIG. 7 is referred to as a conductive member 10B.
- the conductive member 10A is a conductive member 10 that is on the lower side in the overlapped portion after connection.
- the conductive member 10B is the conductive member 10 that is on the upper side in the overlapped portion after connection.
- the connecting portion between the conductive members 10 is configured by joining a part of the other conductive member 10 on a part of the one conductive member 10.
- the left end BLE which is the first end of the conductive member 10B-1
- the right end ARE which is the second end of the conductive member 10A-1
- the right end BRE which is the second end of the conductive member 10B-1.
- both ends of the conductive member 10B-1 are overlapped with portions of the edges of the conductive member 10A-1 and the conductive member 10A-2.
- the left end BLE of the conductive member 10B-1 is overlapped and joined to a part on the edge on the right end ARE side of the conductive member 10A-1, and the right end BRE of the conductive member 10B-1 is connected to the left end ALE of the conductive member 10A-2.
- 'It is overlapped and joined to a part on the side edge.
- the left end BLE ′ of the conductive member 10B-2 is overlapped and joined to a part on the edge on the right end ARE ′ side of the conductive member 10A-2, and the right end BRE ′ of the conductive member 10B-2 is connected to the conductive member 10A ⁇ .
- each conductive member 10B is between the conductive member 10A and the adjacent conductive member 10A.
- the other conductive members 10A and 10B (not shown) are sequentially joined and connected in the same manner to form the bus bar wiring 30 that is a connected body of the conductive members 10.
- the right end ARE of the conductive member 10A-1 and the conductive member 10B-1 face each other in the longitudinal direction of the conductive member 10
- the right end ARE of the conductive member 10A-1 and the bent conductive member 10B-1 The right end ARE is not directly joined to the end facing the right end ARE.
- the left end ALE ′ of the conductive member 10A-2 and the conductive member 10B-1 face each other
- the left end ALE ′ of the conductive member 10A-2 and the left end ALE of the bent conductive member 10B-1 Do not directly join the end facing '.
- the joining member 9 is prevented from being disposed at the positions of the end regions U1, U2,.
- the bus bar wiring 30 to which the plurality of conductive members 10 are connected is joined to the thin-film solar cell device 2 by the joining member 9. That is, the connecting member of the conductive member 10 is bonded to the back electrode 8 by the bonding member 9 in order of the conductive member 10A-1, the conductive member 10B-1, the conductive member 10A-2, the conductive member 10B-2,. .
- the thin film solar that can avoid the influence of the meandering of the wire of the conductive member 10 and can relieve the deformation caused by the stress generated between different members, and can achieve the same effect as in the first embodiment. It is possible to produce a battery module. That is, also in the present embodiment, like the first embodiment, the conductive member 10 shorter than the longitudinal size of the thin-film solar cell is connected to configure the bus bar wiring 30, thereby preventing the conductive member 10 from meandering and twisting. It is possible to obtain a thin film solar cell module that can suppress the influence and avoid problems such as efficiency reduction due to a short circuit.
- the joining member 9 has two points on the connection part with the conductive member 10B in the conductive member 10A and two points on the connection part with the back electrode 8, and the connection with the back electrode 8 on the conductive member 10B. Although three points are shown as being evenly scattered in the length direction of the wire, the present invention is not limited to this.
- FIG. 8 is a diagram for explaining a modification of the third embodiment.
- the conductive members 10 ⁇ / b> A and 10 ⁇ / b> B interspersed with the joining members 9 in advance are electrically connected in the longitudinal direction of the conductive member 10 as in the case of FIG. It arrange
- the three joining members 9 are evenly arranged in the length direction of the wire, but in the conductive members 10B-1 and 10B-2, both edges in the length direction of the wire are arranged.
- the joining member 9 is disposed only in the partial region, and the joining member 9 is not disposed near the center in the length direction of the wire.
- both ends of the conductive member 10B-1 are overlapped and joined to a part on the edge on the right end ARE side of the conductive member 10A-1 and a part on the edge on the left end ALE 'side of the conductive member 10A-2.
- both ends of the conductive member 10B-2 are overlapped and joined to a part on the edge on the right end ARE ′ side of the conductive member 10A-2 and a part on the edge on the left end ALE ′′ side of the conductive member 10A-3.
- the central portion in the longitudinal direction of the conductive member 10B-1 is bent between the conductive member 10A-1 and the conductive member 10A-2 adjacent to the conductive member 10A-1 and the conductive member 10A-2.
- the other conductive members 10A and 10B are sequentially joined and connected in the same manner to form the bus bar wiring 30 that is a connected body of the conductive members 10.
- the joining member 9 is not disposed near the center in the length direction of the wire. Therefore, in the end region U1 where the right end ARE of the conductive member 10A-1 and the conductive member 10B-1 face each other in the conductive member 10, the right end ARE of the conductive member 10A-1 and the bent conductive member 10B-1 The end facing the right end ARE is not directly joined.
- the left end ALE ′ of the conductive member 10A-2 and the conductive member 10B-1 face each other in the conductive member 10
- the left end ALE ′ of the conductive member 10A-2 and the bent conductive member 10B-1 The end opposite to the left end ALE ′ is not directly joined.
- the bus bar wiring 30 to which the plurality of conductive members 10 are connected is made into the thin film solar cell device 2 by the bonding member 9 in the same manner as in the third embodiment.
- Join That is, the connecting member of the conductive member 10 is joined to the back electrode 8 in order of the conductive member 10A-1, the conductive member 10B-1, the conductive member 10A-2, the conductive member 10B-2,.
- the conductive member 10A (conductive member 10A-1, conductive member 10A- 2, the conductive member 10A-3... Are bonded to the thin film solar cell device 2, while the conductive member 10B (conductive member 10B-1, conductive member 10B-2%) Is bonded to the thin film solar cell device 2.
- the thin film solar that can avoid the influence of the meandering of the wire of the conductive member 10 and can relieve the deformation caused by the stress generated between different members, and can achieve the same effect as in the first embodiment. It is possible to produce a battery module. That is, by connecting the conductive member 10 shorter than the longitudinal size of the thin-film solar cell to configure the bus bar wiring 30 as in the first embodiment, the influence of the meandering and twisting of the conductive member 10 can be suppressed, and the short circuit A thin-film solar cell module that can avoid inconveniences such as a reduction in efficiency can be obtained.
- the conductive member 10B has a certain degree of freedom in the vicinity of the center in the longitudinal direction, can be expanded and contracted, can be bent, and can form a thin film solar cell module that can obtain the same effects as those of the first embodiment. Is possible.
- the joining members 9 are scattered in the conductive member 10 ⁇ / b> A, but the arrangement form of the joining members 9 is not limited to this.
- the conductive member 10 that is located on the thin film solar cell side of the overlapping conductive member 10 may not have the end portion in the longitudinal direction of the thin film solar cell directly joined to the other conductive member 10.
- the joining member 9 may be provided over the entire width in the longitudinal direction of the thin-film solar cell in the conductive member 10A.
- FIG. 9 is a diagram for explaining another modification of the third embodiment.
- (A), (b), and (c) in FIG. 9 correspond to (a), (b), and (c) in FIG. 8, respectively.
- the configuration similar to that shown in FIG. 8, except that the distance a between adjacent conductive members 10 ⁇ / b> A in the longitudinal direction of the thin film solar cell is extremely narrow and the conductive member 10 ⁇ / b> B is not bent.
- manufacturing methods are applied. That is, in the process shown in FIG. 9A, the conductive member 10A and the conductive member 10B are arranged in a state where the distance a is extremely narrow compared to FIG. 8A. Next, in the process shown in FIG.
- bus bar wiring 30 to which the plurality of conductive members 10 are connected is joined to the thin-film solar cell device 2 by the joining member 9 in the same manner as in FIG. To do.
- the space a between the conductive member 10A-1 and the conductive member 10A-2 is very narrow, so the conductive member 10B-1 is not bent.
- the conductive member 10B-1 is not bent.
- the other conductive members 10B in the end region U′1 on the right end ARE side of the conductive member 10A-1, the end region U′2 on the left end ALE ′ side of the conductive member 10A-2 and other corresponding regions, the conductive member 10A and The conductive member 10B is not directly joined.
- there is a certain degree of freedom in the central portion of the conductive member 10B there is a certain degree of freedom in the central portion of the conductive member 10B, and it is possible to form a thin film solar cell module that can obtain the same effects as those of the first embodiment.
- the thin-film solar cell module and the manufacturing method thereof according to the present invention avoids a decrease in power generation efficiency due to the influence of the meandering of the wiring material, and the warpage of the substrate in the manufacturing process and peeling of the connection portion of the electrode and the wiring This is useful for preventing a decrease in manufacturing yield.
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Abstract
Description
図1は、本発明の実施の形態1に係る薄膜太陽電池モジュールの裏面側平面概略構成を示す図である。図2は、図1に示す薄膜太陽電池モジュールのAA断面概略構成を示す図である。薄膜太陽電池モジュールのうち、太陽光が入射する側の面を表面とし、表面とは反対側の面を裏面とする。
図5は、本発明の実施の形態2に係る薄膜太陽電池モジュールの製造方法のうち、バスバー配線形成工程の各過程における概略断面構成を示す図である。本実施の形態は、あらかじめ互いに連結された複数の導電部材10を薄膜太陽電池デバイス2に接合させることを特徴とする。実施の形態1と同一の部分には同一の符号を付し、重複する説明を省略する。
図7は、本発明の実施の形態3に係る薄膜太陽電池モジュールの製造方法のうち、バスバー配線形成工程の各過程における概略断面構成を示す図である。本実施の形態は、あらかじめ互いに連結された複数の導電部材10を薄膜太陽電池デバイス2に接合させる点は実施の形態2と同様であるが、複数の導電部材10の連結形態が実施の形態2と異なる。実施の形態1と同一の部分には同一の符号を付し、重複する説明を省略する。
3、30 バスバー配線
8 裏面電極
9 接合部材
10 導電部材
Claims (7)
- 複数の薄膜太陽電池セルを直列に接続させて構成された薄膜太陽電池デバイスと、
前記薄膜太陽電池デバイスの正極側端部および負極側端部に設けられたバスバー配線と、を有し、
前記バスバー配線は、複数の導電部材が一部に重なりをもって連結して構成されることを特徴とする薄膜太陽電池モジュール。 - 前記複数の導電部材の連結部分において前記導電部材同士を接合させる接合部材を有し、
前記接合部材は、前記導電部材の端部には配置されないことを特徴とする請求項1に記載の薄膜太陽電池モジュール。 - 複数の薄膜太陽電池セルが直列に接続された薄膜太陽電池デバイスを形成する工程と、
前記薄膜太陽電池デバイスの正極側端部および負極側端部にバスバー配線を形成するバスバー配線形成工程と、を含み、
前記バスバー配線形成工程において、複数の導電部材を一部に重なりを持たせて連結させることにより前記バスバー配線を形成することを特徴とする薄膜太陽電池モジュールの製造方法。 - 前記バスバー配線形成工程において、
前記薄膜太陽電池デバイスに先に接合された導電部材と、前記薄膜太陽電池デバイスとに、次の導電部材を接合することにより、前記薄膜太陽電池デバイス上にて前記導電部材同士を連結させることを特徴とする請求項3に記載の薄膜太陽電池モジュールの製造方法。 - 前記バスバー配線形成工程において、
前記導電部材同士を順次接合させることで複数の前記導電部材を連結させ、
互いに連結された複数の前記導電部材を前記薄膜太陽電池デバイスに接合させることを特徴とする請求項3に記載の薄膜太陽電池モジュールの製造方法。 - 前記バスバー配線形成工程において、
互いに連結された複数の前記導電部材の一部を前記薄膜太陽電池デバイスに接合させることを特徴とする請求項5に記載の薄膜太陽電池モジュールの製造方法。 - 前記バスバー配線形成工程において、
前記導電部材同士を接合部材により接合させ、
前記導電部材および前記薄膜太陽電池デバイスを接合させ、
前記導電部材同士を接合する前記接合部材は、前記導電部材の端部には配置しないことを特徴とする請求項4~6のいずれか1つに記載の薄膜太陽モジュールの製造方法。
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US13/503,474 US20120204932A1 (en) | 2009-11-05 | 2010-10-20 | Thin-film solar battery module and method for manufacturing the same |
CN201080049952.2A CN102630347B (zh) | 2009-11-05 | 2010-10-20 | 薄膜太阳能电池模块及其制造方法 |
JP2011539331A JP5174972B2 (ja) | 2009-11-05 | 2010-10-20 | 薄膜太陽電池モジュールおよびその製造方法 |
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CN103236461B (zh) * | 2013-04-03 | 2016-05-25 | 友达光电股份有限公司 | 光电转换模块 |
CN106449777B (zh) * | 2016-11-04 | 2018-06-01 | 广东永明建设发展有限公司 | 一种具有高光电转换效率的太阳能电池模块 |
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EP1726046B1 (en) * | 2004-03-16 | 2007-06-20 | VHF Technologies SA | Electric energy generating modules with a two-dimensional profile and method of fabricating the same |
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- 2010-10-20 JP JP2011539331A patent/JP5174972B2/ja not_active Expired - Fee Related
- 2010-10-20 US US13/503,474 patent/US20120204932A1/en not_active Abandoned
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US20120204932A1 (en) | 2012-08-16 |
CN102630347A (zh) | 2012-08-08 |
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