WO2013183395A1 - Module de batterie solaire et procédé de fabrication de module de batterie solaire - Google Patents

Module de batterie solaire et procédé de fabrication de module de batterie solaire Download PDF

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Publication number
WO2013183395A1
WO2013183395A1 PCT/JP2013/063035 JP2013063035W WO2013183395A1 WO 2013183395 A1 WO2013183395 A1 WO 2013183395A1 JP 2013063035 W JP2013063035 W JP 2013063035W WO 2013183395 A1 WO2013183395 A1 WO 2013183395A1
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WIPO (PCT)
Prior art keywords
solar cell
cell module
receiving surface
surface side
bus bar
Prior art date
Application number
PCT/JP2013/063035
Other languages
English (en)
Japanese (ja)
Inventor
和志 飯屋谷
晴生 奥野
小林　正和
利美 甲斐
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2013005655A external-priority patent/JP6104612B2/ja
Priority claimed from JP2013027592A external-priority patent/JP6087164B2/ja
Priority claimed from JP2013027591A external-priority patent/JP2014013875A/ja
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Priority to CN201380029248.4A priority Critical patent/CN104350677B/zh
Priority to US14/405,315 priority patent/US10269998B2/en
Publication of WO2013183395A1 publication Critical patent/WO2013183395A1/fr
Priority to US15/883,550 priority patent/US10756224B2/en

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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
    • H01L31/04—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
    • H01L31/0488—Double glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the present invention relates to a solar cell module for photoelectrically converting sunlight and a method for manufacturing the solar cell module, and more particularly to a solar cell module having a laminated glass structure and a method for manufacturing the solar cell module.
  • One such solar cell module is a solar cell module having a laminated glass structure.
  • the solar cell module provided with this laminated glass structure has a plurality of solar cells electrically connected to each other sandwiched between the light-receiving surface side glass and the non-light-receiving surface side glass, thereby sealing the solar cells inside. It has a structure.
  • the current generated in the solar battery cell is taken out of the solar battery module by the extraction electrode on the positive electrode side and the negative electrode side.
  • a solar cell module having a laminated glass structure is a so-called daylighting solar cell module that is provided on a window, a roof, or the like and can capture sunlight even in a space located on the non-light-receiving surface side of the solar cell module. As such, it is preferably used.
  • FIG. 36 is a plan view schematically showing an example of the solar cell module.
  • the solar cell module 501 is formed by sealing a plurality of solar cells 503 or the like between two light-transmitting substrates 502. Further, the solar cells 503 are arranged in four rows in the vertical direction, the solar cells 503 are connected in series through the interconnector 504 and the bus bar 505, and the solar cells 503 connected in series are connected to the terminal box through the bus bar 506. 507 is connected to the terminal box 507 to output the generated power of each solar battery cell 503.
  • the sealing resin layer interposed therebetween in order to prevent the solar cell from being cracked or cracked under a pressure environment in the sealing process, the light receiving surface side glass and the non-light receiving surface side glass It is necessary to increase the thickness of the sealing resin layer interposed therebetween. Therefore, the thickness as a solar cell module will increase, and the exposure surface to the exterior of sealing resin in the edge part of a solar cell module will increase. As a result, there is a problem that the sealing resin is discolored due to an increase in moisture absorption of the sealing resin, and the characteristics of the solar battery cell are easily deteriorated. Furthermore, in the sealing process, there is also a problem that the sealing resin that has become softened protrudes in large quantities from the end portion of the solar cell module.
  • Patent Document 2 discloses a frame that secures a space in which a solar cell cell array is arranged in the thickness direction of the solar cell cell array between the front surface side glass plate and the back surface side glass plate.
  • a solar cell module including a spacer member and a manufacturing method thereof are disclosed.
  • the daylighting solar cell module is required to have a design property because it is provided on a window, a roof, etc., as well as the efficiency and reliability of photoelectric conversion, and further, the design property.
  • the degree of freedom of solar cell arrangement (design degree of freedom) is also required for daylighting.
  • the attachment position of the terminal box 507 is on the short side of the solar cell module 501, but the long side of the solar cell module 501 may be required as the attachment position. If the respective solar cells 503 are connected in the same manner as the solar cell module 501 of FIG. 36 and the attachment position of the terminal box 507 is moved to the long side of the solar cell module 501, as shown in FIG. Connection configuration.
  • the number of rows of the solar cells 503 is large, the number of bus bars 505 connecting the rows and the number of connection locations are increased, and the connection configuration of the solar cells 503 is increased. It becomes complicated, and the number of parts and connection processes such as soldering increase.
  • any of the solar cell modules 501 of FIGS. 36 and 37 since the bus bars 505 and 506 are arranged side by side on a two-dimensional plane, a space that does not contribute to either power generation or lighting is widened. .
  • the present invention does not complicate the connection configuration of each solar battery cell even when the generated power is taken out from the long side of the solar battery module, such as the number of parts and soldering. It aims at providing the solar cell module which can suppress the increase in a connection process.
  • Patent Document 2 does not disclose in detail the method of taking out the extraction electrode from the solar cell module.
  • the present invention prevents a sealing resin from protruding from the end of the solar cell module and prevents the sealing resin from adhering to the extraction electrode in the sealing step and the solar cell. It aims at providing the manufacturing method of a battery module.
  • the present invention realizes a method for manufacturing a solar cell module that prevents the sealing resin from protruding from the end portion of the solar cell module in the sealing step and hardly causes the positional deviation of the solar cell. And it aims at providing the solar cell module with few position shifts of a photovoltaic cell.
  • the solar cell module according to the first aspect of the present invention is a solar cell module in which a plurality of solar cells are connected to each other and the generated power of each of the solar cells is output through a bus bar, the bus bar having an L-shape.
  • an output terminal for outputting the generated power of each of the solar cells may be connected to the second bar member.
  • the bus bar includes a positive electrode bus bar and a negative electrode bus bar, and the first bar member and the second bar member of the positive electrode bus bar and the first bar member and the second bar member of the negative electrode bus bar. And the first bar member of the positive electrode bus bar and the first bar member of the negative electrode bus bar along one side of the solar cell module.
  • the solar cell is disposed and connected to the positive electrode of the solar battery cell and the negative electrode of another solar battery cell, and the second bar member of the positive electrode bus bar and the second bar member of the negative electrode bus bar are orthogonal to the one side. You may arrange
  • the output terminal or the bypass diode may be provided on the other side.
  • the insulating member may be folded back at the side end of the positive electrode bus bar or the side end of the negative electrode bus bar to cover the side end.
  • the solar cell module according to the second aspect of the present invention is a lead electrode in which a plurality of electrically connected solar cells are sealed with a light-receiving surface side glass, a non-light-receiving surface side glass, and a sealing resin layer.
  • the extraction electrode is drawn out of the solar cell module.
  • the protrusion prevention wall may have an adhesive layer.
  • two protrusion prevention walls may be arranged in the thickness direction of the solar cell module.
  • the width of the protrusion prevention wall may be 5 mm to 10 mm.
  • the protrusion prevention wall may be disposed at any end of the solar cell module.
  • At least a part of the extraction electrode may be covered with a protective film.
  • the manufacturing method of the solar cell module which concerns on the 2nd aspect of this invention is a protrusion prevention wall which arrange
  • a solar cell module manufacturing method having a sealing step for sealing solar cells, wherein the solar cells are electrically connected to the extraction electrode, and the light receiving surface side protrudes in the mounting step After the extraction electrode is arranged on the prevention wall, the non-light-receiving surface side extraction prevention wall is arranged on the extraction electrode.
  • the method for manufacturing a solar cell module of the present invention may be one in which a spacer is disposed outside the solar cell module at the end of the solar cell module in which the protrusion prevention wall is disposed.
  • the protrusion prevention wall may have an adhesive layer.
  • the solar cell module according to the third aspect of the present invention is a solar cell module in which a plurality of electrically connected solar cells are sealed with a light-receiving surface side glass, a non-light-receiving surface side glass, and a sealing resin. And it has a protrusion prevention wall between the light-receiving surface side glass and the non-light-receiving surface side glass at a pair of opposing ends of the solar cell module, and a plurality of protrusion prevention walls are provided in the thickness direction of the solar cell module. It is what is arranged.
  • the protrusion prevention wall may have an adhesive layer.
  • the solar cell module according to the present invention may have two protruding prevention walls arranged in the thickness direction of the solar cell module.
  • the solar cell module according to the present invention may have a protrusion prevention wall with a width of 5 mm to 10 mm.
  • the solar cell module according to the present invention may have a protrusion preventing wall disposed at any end of the solar cell module.
  • the solar cell module according to the present invention may be one in which an extraction electrode is drawn out from between adjacent protrusion prevention walls at one end of the solar cell module.
  • the manufacturing method of the solar cell module which concerns on the 3rd aspect of this invention is the protrusion which arrange
  • the method for manufacturing a solar cell module according to the present invention may be one in which a spacer is arranged outside the solar cell module at the end of the solar cell module in which the protrusion prevention wall is arranged in the mounting step.
  • the protrusion prevention wall may have an adhesive layer.
  • a bus bar composed of a first bar member and a second bar member forming an L shape is used, and the first bar member is arranged along one side of the solar cell module and connected to the electrode of the solar cell,
  • the 2nd bar member is arrange
  • the connection configuration can be simplified.
  • the solar cell module and the method for manufacturing the solar cell module according to the present invention prevent the sealing resin from protruding from the end of the solar cell module in the sealing step, and seal it to the extraction electrode. It is possible to prevent the resin from adhering.
  • the solar cell module and the solar cell module manufacturing method according to the present invention prevent the sealing resin from protruding from the end of the solar cell module in the sealing step, and the position of the solar cell. Deviation can be made difficult to occur.
  • Embodiment 1 of this invention Comprising: It is a top view which shows the solar cell module of this invention seeing from the surface (light-receiving surface) side. It is a reverse view which shows the solar cell module of FIG. 1 seeing from a back surface side.
  • (A), (b), (c), (d) are cross-sectional views along AA in FIG. 1, cross-sectional views along BB in FIG. 1, and along CC in FIG.
  • FIG. 2 is a cross-sectional view taken along the line DD of FIG. (A), (b) is sectional drawing along EE of FIG. 1, and sectional drawing along FF of FIG.
  • FIG. (A) is a back view which shows a positive electrode bus bar and an auxiliary bar member seeing from a back surface side
  • (b) is a side view which shows a positive electrode bus bar and an auxiliary bar member.
  • (A) is a back view which shows a negative electrode bus bar seeing from a back surface side
  • (b) is a side view which shows a negative electrode bus bar. It is a disassembled perspective view which shows a positive electrode bus bar, a negative electrode bus bar, an insulating member, and an auxiliary bar member.
  • FIG. 4 is a cross-sectional view showing the first bar member of the positive electrode bus bar, the first bar member of the negative electrode bus bar, the auxiliary bar member, and the like, broken along the vertical direction, and an enlarged view showing a portion IV in the cross-sectional view.
  • FIG. 10 is a plan view showing Embodiment 2 of the present invention, as viewed from the light receiving surface side of the solar cell module.
  • FIG. FIG. 19 is a cross-sectional view taken along the line AA ′ of the solar cell module shown in FIG.
  • FIG. 19 shows Embodiment 2 of the present invention and is a cross-sectional view taken along the line BB ′ of the solar cell module shown in FIG. 18.
  • FIG. 19 shows Embodiment 2 of the present invention and is an enlarged cross-sectional view of a portion C of the solar cell module shown in FIG. 18.
  • 10 is a plan view showing Embodiment 2 of the present invention, as viewed from the light receiving surface side of the solar cell module.
  • Embodiment 2 of this invention Comprising: It is sectional drawing which shows the manufacturing method of a solar cell module.
  • 10 is a plan view showing Embodiment 3 of the present invention, as viewed from the light-receiving surface side of the solar cell module.
  • FIG. Embodiment 3 of the present invention is shown, and is an enlarged sectional view of a portion F of the solar cell module shown in FIG. 10 is a plan view showing Embodiment 4 of the present invention, as viewed from the light-receiving surface side of the solar cell module.
  • FIG. FIG. 29 shows Embodiment 4 of the present invention and is a cross-sectional view taken along line AA ′ of the solar cell module shown in FIG. 28.
  • Embodiment 4 of the present invention is a cross-sectional view taken along line BB ′ of the solar cell module shown in FIG. 28.
  • 10 is a plan view showing Embodiment 4 of the present invention, as viewed from the light-receiving surface side of the solar cell module.
  • FIG. 10 is a plan view illustrating Embodiment 5 of the present invention as viewed from the light-receiving surface side of the solar cell module.
  • FIG. FIG. 34 is a cross-sectional view taken along line EE ′ of the solar cell module shown in FIG. 33, showing Embodiment 5 of the present invention.
  • FIG. 34 is a cross-sectional view taken along the line FF ′ of the solar cell module shown in FIG. 33, showing Embodiment 5 of the present invention. It is a figure which shows an example of the conventional solar cell module roughly. It is a figure which shows schematically the other example of the conventional solar cell module.
  • FIG. 1 and 2 are a plan view and a back view, respectively, showing the solar cell module according to Embodiment 1 of the present invention when viewed from the front surface (light receiving surface) side and the back surface side.
  • 3 (a), (b), (c), and (d) are a cross-sectional view along AA in FIG. 1, a cross-sectional view along BB in FIG. 1, and a C- FIG. 2 is a cross-sectional view taken along a line C and a cross-sectional view taken along a line DD in FIG. 4A and 4B are a cross-sectional view taken along line EE in FIG. 1 and a cross-sectional view taken along line FF in FIG.
  • FIG. 1 and 2 are a plan view and a back view, respectively, showing the solar cell module according to Embodiment 1 of the present invention when viewed from the front surface (light receiving surface) side and the back surface side.
  • 3 (a), (b), (c), and (d) are a cross-sectional
  • FIG. 5 is a cross-sectional view showing the vicinity of the output terminal of the solar cell module of FIG. Further, FIGS. 6A, 6B, and 6C are enlarged views showing portions I, II, and III in FIG. 1 to 5, the horizontal direction is X and the vertical direction is Y.
  • the solar cell module 1 includes a light-receiving surface glass plate 2 a oriented in the sunlight incident direction, a sealing resin 4 a, a plurality of solar cells 3, a wiring member for each solar cell 3,
  • the sealing resin 4b and the back glass plate 2b are sequentially overlapped to sandwich the solar cells 3, the wiring members of the solar cells 3, and the sealing resins 4a and 4b between the glass plates 2a and 2b.
  • the solar cells 3 and the wiring members thereof are sealed with the sealing resins 4a and 4b.
  • two strip-shaped double-sided adhesive tapes 5a and 5b are provided along each side of each glass plate 2a and 2b, and the double-sided adhesive tapes 5a and 5b are sandwiched between the end portions of each glass plate 2a and 2b. It is out.
  • tempered glass having a thickness of about 4 mm is applied as the light-receiving surface glass plate 2a and the back glass plate 2b.
  • double tempered glass or untempered glass may be applied.
  • each sealing resin 4a, 4b ethylene vinyl acetate (EVA) having a high transmittance in the visible light region is applied.
  • EVA ethylene vinyl acetate
  • an ionomer resin, an olefin resin, or the like may be applied.
  • Each double-sided adhesive tape 5a, 5b is formed by forming an adhesive layer on both sides of a prismatic base material.
  • a base material an acrylic resin foam can be applied, and a urethane resin, silicone resin, butyl rubber, or the like may also be applied.
  • the double-sided adhesive tapes 5a and 5b prevent the sealing resins 4a and 4b from protruding in the sealing process described later, and prevent rainwater and the like from entering between the glass plates 2a and 2b. However, since it does not contribute to either solar power generation or daylighting, it is preferable to set their width to about 7 to 10 mm.
  • Each solar cell 3 uses, for example, a crystalline silicon substrate, and two sets of negative electrodes are provided on the light receiving surface directed in the incident direction of sunlight, and two sets of positive electrodes are provided on the back surface. Yes. Further, the solar cells 3 are arranged in the first row R1 and the second row R2 in the lateral direction with a predetermined interval therebetween. Separately from the first and second rows R1 and R2, two sets of negative electrodes provided on the light receiving surface of the solar battery cell 3 and two sets of positive electrodes provided on the back surface of the other solar battery cell 3 adjacent thereto are provided. A solar battery string formed by connecting the solar battery cells 3 in series by connecting through two interconnectors 6 is formed.
  • the connecting bus bar 7 is arranged in parallel with the vertical side 1a of the solar cell module 1 and in the vicinity of one end of the first and second rows R1 and R2.
  • the connecting bus bar 7 is connected to each interconnector 6 derived from each negative electrode of the solar cell 3 at one end of the first row R1, and each positive electrode of the solar cell 3 at one end of the second row R2. Is connected to each interconnector 6 derived from. Thereby, all the photovoltaic cells 3 of the 1st and 2nd row
  • two L-shaped positive electrode bus bars 11 and negative electrode bus bars 12 are arranged along the other vertical side 1b of the solar cell module 1 and the horizontal side 1c orthogonal to the vertical side 1b.
  • the positive electrode bus bar 11 and the negative electrode bus bar 12 are superposed in a direction orthogonal to the light receiving surface of each solar battery cell 3 via an insulating member, and the positive electrode bus bar 11 is behind the negative electrode bus bar 12 and the back glass plate 2b.
  • the negative electrode bus bar 12 is positioned closer to the light receiving surface glass plate 2 a than the positive electrode bus bar 11.
  • the positive electrode bus bar 11 is extended in the longitudinal direction Y to an intermediate position between the first row R1 and the second row R2, is disposed in the vicinity of the other end of the first row R1, and the sun at the other end of the first row R1.
  • Each interconnector 6 led out from each positive electrode of the battery cell 3 is connected.
  • the positive electrode bus bar 11 is extended in the lateral direction X to near the center of the first and second rows R1 and R2, and a pair of positive electrode output terminals 13a and 13b connected to the positive electrode bus bar 11 is provided. It is pulled out from between each double-sided adhesive tape 5a, 5b to the outside of each glass plate 2a, 2b.
  • the negative electrode bus bar 12 is longer than the positive electrode bus bar 11 and extends in the vertical direction Y, is disposed near the other end of the second row R2, and each negative electrode of the solar cell 3 at the other end of the second row R2. Is connected to each interconnector 6 derived from.
  • the negative electrode bus bar 12 extends in the lateral direction X longer than the positive electrode bus bar 11, and a pair of negative output terminals 14a and 14b connected to the negative electrode bus bar 12 are connected to the double-sided adhesive tape 5a, It is pulled out to the outside of each glass plate 2a, 2b from between 5b.
  • the solar cell module 1 includes a positive electrode box 15, a negative electrode box 16, and a diode box 17 which are bonded to the end face of the lateral side 1c.
  • One positive electrode output terminal 13 a connected to the positive electrode bus bar 11 and the positive electrode cable 18 are introduced into the positive electrode box 15, and the positive electrode output terminal 13 a and the positive electrode cable 18 are connected inside the positive electrode box 15. It is connected.
  • one negative output terminal 14 a connected to the negative electrode bus bar 12 and the negative electrode cable 19 are introduced into the negative electrode box 16, and the negative output terminal 14 a and the negative electrode cable 19 are installed inside the negative electrode box 16. 19 is connected.
  • the other positive electrode output terminal 13 b connected to the positive electrode bus bar 11 and the other negative electrode output terminal 14 b connected to the negative electrode bus bar 13 are introduced into the diode box 17, and the positive electrode is formed inside the diode box 17.
  • the output terminal 13 b and the negative output terminal 14 b are connected via the bypass diode 21.
  • each solar cell 3 the generated power generated by each solar cell 3 is connected to each interconnector 6, connection bus bar 7, positive electrode bus bar 11, negative electrode bus bar 12, positive electrode cable 18, and negative electrode. It is transmitted through the cable 19 and output to the outside.
  • connection bus bar 7 positive electrode bus bar 11, negative electrode bus bar 12, positive electrode cable 18, and negative electrode. It is transmitted through the cable 19 and output to the outside.
  • the solar cell module 1 is used in series with other solar cell modules, when only the solar cell module 1 is in the shadow and the solar cell module 1 is in a reverse bias state, Current from the module flows through the bypass diode 21 and power loss is reduced.
  • the solar cells 3 are arranged at a predetermined interval from each other, and the solar cells 3 are separated from the vertical sides 1 a and 1 b and the horizontal sides 1 c and 1 d of the solar cell module 1. For this reason, sunlight permeate
  • the bus bars 11 and 12 are compared with the case where the bus bars 11 and 12 are arranged side by side on a two-dimensional plane.
  • the area where sunlight is blocked is reduced, and the lighting rate of the solar cell module 1 is improved.
  • the daylighting rate is expressed by (amount of light transmitted through the solar cell module 1) / (amount of light incident on the solar cell module 1).
  • each sealing resin 4a, 4b is not exposed to external air, and discoloration etc. of each sealing resin 4a, 4b by absorption of a water
  • an L-shaped positive electrode bus bar 11 and a negative electrode bus bar 12 are provided along the vertical side 1b and the horizontal side 1c of the solar cell module 1, and the positive electrode output terminals 13a and 13b and the negative electrode output terminals 14a and 14b are long.
  • a positive electrode box 15, a negative electrode box 16, and a diode box 17 are provided on the longer side 1c.
  • all the solar cells 3 in the first and second rows R1 and R2 are connected in series by using only one connection bus bar 7. Therefore, in comparison with the conventional solar cell module of FIG. 37 and the like, the number of bus bars is increased despite the positive electrode box 15 and the negative electrode box 16 being attached to the longer side 1c of the solar cell module 1. There are few places which solder a bus bar, and it can control the increase in the number of parts and connection processes, such as soldering.
  • the positive electrode box 15, the negative electrode box 16, and the diode box 17 are provided on the lateral side 1c, when the solar cell module 1 is attached to the window frame, the boxes 15, 16, and 17 are attached. It can be concealed and concealed in the hollow space of the frame of the window frame, and deterioration of the design of the window can be prevented.
  • FIG. 7A is a rear view showing the positive electrode bus bar 11 as viewed from the rear side, as in FIG. 2, and FIG. 7B is a side view showing the positive electrode bus bar 11.
  • the positive electrode bus bar 11 has one end of the band-shaped first bar member 11a and one end of the band-shaped second bar member 11b connected by soldering or the like.
  • the first and second bar members 11a and 11b are arranged in an L shape.
  • the 1st bar member 11a is arrange
  • the 2nd bar member 11b is arrange
  • a pair of positive electrode output terminals 13a and 13b are connected to the second bar member 11b by soldering or the like, and the positive electrode output terminals 13a and 13b are connected to the first bar member 11a from the second bar member 11b. Projecting in the opposite direction.
  • FIG. 7A and 7B also show an auxiliary bar member 26 used in combination with the negative electrode bus bar 12.
  • the auxiliary bar member 26 is disposed on the extension of the first bar member 11a of the positive electrode bus bar 11 and is separated from the first bar member 11a.
  • FIG. 8A is a rear view showing the negative electrode bus bar 12 as viewed from the rear side, as in FIG. 2, and FIG. 8B is a side view showing the negative electrode bus bar 12.
  • the negative electrode bus bar 12 has one end of the strip-shaped first bar member 12a and one end of the strip-shaped second bar member 12b connected by soldering or the like.
  • the first and second bar members 12a and 12b are arranged in an L shape.
  • the second bar member 12b is obtained by connecting and joining two bar members 12c and 12d by soldering or the like.
  • the 1st bar member 12a is arrange
  • the 2nd bar member 12b is arrange
  • a pair of negative electrode output terminals 14a and 14b are connected to the bar member 12d on the distal end side of the second bar member 12b by soldering or the like, and the respective negative electrode output terminals 14a and 14b are connected to the first bar member 12d from the first bar member 12d. It protrudes in the opposite direction to the bar member 12a.
  • the positive electrode bus bar 11, the negative electrode bus bar 12, the positive electrode output terminals 13a and 13b, the negative electrode output terminals 14a and 14b, and the auxiliary bar member 26 are, for example, solder-plated on the surface of a strip-shaped copper material, Their thickness and width are the same.
  • FIG. 9 shows the positive electrode bus bar 11, the negative electrode bus bar 12, the auxiliary bar member 26, the insulating member 22 sandwiched between the bus bars 11, 12, and the insulating member sandwiched between the auxiliary bar member 26 and the negative electrode bus bar 12.
  • FIG. 9 shows the positive electrode bus bar 11 and the negative electrode bus bar 12 are overlapped via an insulating member 22, and the bus bars 11 and 12 are insulated by the insulating member 22.
  • the negative electrode bus bar 12, the insulating member 22, and the positive electrode bus bar 11 overlap in a direction orthogonal to the light receiving surface of each solar cell 3.
  • an insulating member 27 and an auxiliary bar member 26 are overlapped from the side opposite to the positive electrode bus bar 11 (the lower side in FIG. 9) on approximately half of the distal end side of the first bar member 12 a of the negative electrode bus bar 12. 27, the auxiliary bar member 26 and the first bar member 12a are insulated from each other.
  • the insulating member 22 has a belt-like first insulating member 22a and a belt-like second insulating member 22b arranged in an L shape, and the L-shaped corners of the bus bars 11 and 12 are L-shaped. Is superimposed on the corner of The first insulating member 22 a is slightly longer in the longitudinal direction Y than the first bar member 11 a of the positive electrode bus bar 11, and the entire first bar member 11 a and a part of the first bar member 12 a of the negative electrode bus bar 12.
  • the first bar member 11a and the first bar member 12a are insulated from each other with at least a portion overlapping with the first bar member 11a.
  • the second insulating member 22 b is slightly longer in the lateral direction X than the second bar member 11 b of the positive electrode bus bar 11, and the entire second bar member 11 b and a part of the second bar member 12 b of the negative electrode bus bar 12.
  • the second bar member 11b and the second bar member 12b are insulated from each other with at least a portion overlapping with the second bar member 11b.
  • the insulating member 27 is slightly longer in the longitudinal direction Y than the auxiliary bar member 26, and the entire auxiliary bar member 26 and the tip side portion of the first bar member 12 a of the negative electrode bus bar 12 (at least overlap the auxiliary bar member 26).
  • the auxiliary bar member 26 and the first bar member 12a are insulated from each other.
  • the insulating member 22 (first and second insulating members 22a, 22b) has an adhesive layer on both surfaces thereof, and is bonded to both the positive electrode bus bar 11 and the negative electrode bus bar 12, so that each bus bar 11, 12 are held together.
  • the insulating member 27 has an adhesive layer on both surfaces thereof, and is bonded to both the first bar member 12a and the auxiliary bar member 26 of the negative electrode bus bar 12, so that the first bar member 12a and the auxiliary bar member 26 are bonded.
  • the bar member 26 is held integrally. Therefore, the positive electrode bus bar 11, the negative electrode bus bar 12, and the auxiliary bar member 26 are insulated and integrally held by the insulating members 22 and 27.
  • each of the insulating members 22 and 27 is formed by forming an epoxy adhesive layer having a thickness of 30 ⁇ m on both sides of a polyimide film having a thickness of 25 ⁇ m, and the total thickness is approximately 85 ⁇ m.
  • an adhesive layer an epoxy system having excellent insulating properties is applied, so that the insulating properties of the insulating members 22 and 27 can be sufficiently increased without particularly increasing the thickness of the polyimide film. Can be reduced.
  • FIG. 10 is a cross-sectional view showing the first bar member 11a of the positive electrode bus bar 11, the first bar member 12a of the negative electrode bus bar 12, the auxiliary bar member 26 and the like broken along the vertical direction Y, and the cross-sectional view. It is an enlarged view which shows the part IV in FIG. As shown in FIG. 10, the first bar member 12a of the negative electrode bus bar 12 has an approximately half of the L-shaped corner portion side overlapped with the first bar member 11a of the positive electrode bus bar 11 via the first insulating member 22a. Then, approximately half of the tip end side is overlaid on the auxiliary bar member 26 via the insulating member 27.
  • first bar member 12a is located closer to the light receiving surface glass plate 2a than the first bar member 11a in the portion overlapped with the first bar member 11a, and the first bar member 12a is overlapped with the auxiliary bar member 26 in the first portion.
  • the 1 bar member 12a is positioned closer to the back glass plate 2b than the auxiliary bar member 26 is.
  • FIG. 11 is a cross-sectional view showing the second bar member 11b of the positive electrode bus bar 11 and the second bar member 12b of the negative electrode bus bar 12 along the horizontal direction X.
  • the second bar member 12b of the negative electrode bus bar 12 has a substantially half (bar member 12c) on the L-shaped corner portion side of the second electrode member 12b of the positive electrode bus bar 11 via the second insulating member 22b. It overlaps with the bar member 11b, and its front end side substantially half (bar member 12d) is not overlapped with either the second insulating member 22b or the second bar member 11b.
  • the 2nd bar member 12b (bar member 12c) is located near the light-receiving surface glass plate 2a rather than the 2nd bar member 11b.
  • FIG. 12 is an enlarged cross-sectional view showing a portion where the positive electrode bus bar 11 and the negative electrode bus bar 12 overlap (a cross-sectional view along AA in FIGS. 1 and 10 and EE in FIGS. 1 and 11). ).
  • the widths of the first and second insulating members 22a and 22b are the same as the widths of the first and second bar members 11a and 11b of the positive electrode bus bar 11 and the first and second bar members of the negative electrode bus bar 12. It is made wider than the width of 12a, 12b.
  • the first insulating member 22a protrudes from both end portions of each first bar member 11a, 12a, and protrudes more greatly from one end portion of each first bar member 11a, 12a facing the vertical side 1b.
  • the portion of the first insulating member 22a is folded and bonded to one side of the first bar member 12a. For this reason, the first bar members 11a and 12a are unlikely to be misaligned between the first bar members 11a and 12a and the first insulating member 22a. It is reliably insulated by the member 22a.
  • the second insulating member 22b protrudes from both end portions of the second bar members 11b and 12b, and is larger from one end portion of the second bar members 11b and 12b facing the lateral side 1c.
  • the protruding portion of the second insulating member 22b is folded and bonded to one side of the second bar member 12b. For this reason, it is difficult for position shift to occur between the second bar members 11b, 12b and the second insulating member 22b, and even if a position shift of an error level occurs, the second bar members 11b, 12b are not insulated from each other. It is reliably insulated by the member 22b.
  • the positive electrode bus bar 11 and the negative electrode bus bar 12 are covered with an insulating coating resin 23.
  • the insulating coating resin 23 is obtained by forming an adhesive layer having a thickness of 10 ⁇ m on one surface of a polyethylene terephthalate (PET) film having a thickness of 50 ⁇ m.
  • the insulating coating resin 23 covers the entire positive electrode bus bar 11 and the portion excluding the connection portions of the bar members 12c and 12d of the negative electrode bus bar 12 (substantially the entire negative electrode bus bar 12).
  • FIG. 13 is an enlarged cross-sectional view (cross-sectional view taken along the line BB in FIGS. 1 and 10) showing a portion where the negative electrode bus bar 12 and the auxiliary bar member 26 overlap.
  • the width of the insulating member 27 is set wider than the widths of the first bar member 12 a and the auxiliary bar member 26 of the negative electrode bus bar 12.
  • the insulating member 27 protrudes from both end portions of the first bar member 12a and the auxiliary bar member 26, and from one end portion of the first bar member 12a and auxiliary bar member 26 facing the vertical side 1b.
  • the part of the insulating member 27 that protrudes greatly is folded and bonded to one side of the auxiliary bar member 26.
  • the first bar member 12a and the auxiliary bar member 26 are unlikely to be misaligned, and the first bar member 12a and the auxiliary bar member 26 are more reliably secured by the insulating member 27 even if misalignment occurs. Insulated.
  • first bar member 12 a and the auxiliary bar member 26 are covered with an insulating coating resin 23.
  • FIG. 14 is an enlarged view of a substantially half (bar member 12d) on the front end side of the second bar member 12b of the negative electrode bus bar 12 that does not overlap either the second insulating member 22b or the second bar member 11b of the positive electrode bus bar 11.
  • FIG. 12 is a cross-sectional view (a cross-sectional view taken along line FF in FIGS. 1 and 11). As shown in FIG. 14, the second insulating member 22b does not exist in the substantially half (bar member 12d) on the front end side of the second bar member 12b, and the bar member 12d is covered with the insulating coating resin 23.
  • the insulating coating resin 23 covers the portions excluding the tips of the positive electrode output terminals 13a and 13b and the portions other than the tips of the negative electrode output terminals 14a and 14b. .
  • the reason why these tips are not covered is that the tip of the positive electrode output terminal 13 a is connected to the positive electrode cable 18 by soldering or the like inside the positive electrode box 15, or the negative electrode output terminal 14 a is inside the negative electrode box 16.
  • the tip is connected to the negative electrode cable 19 by soldering or the like, or the tip of the positive output terminal 13b and the tip of the negative output terminal 14b are connected to both terminals of the bypass diode 21 inside the diode box 17 by soldering or the like. Because.
  • each output terminal 13a, 13b, 14a, 14b by the insulating coating resin 23 is extended from the outer end face of each double-sided adhesive tape 5a, 5b to the outside.
  • the area covered with the insulating coating resin 23 is extended from the outer end face to the outside by about 3 mm.
  • the outer end surfaces of the double-sided adhesive tapes 5a and 5b are end surfaces orthogonal to the front or back surfaces of the light-receiving surface glass plate 2a and the back glass plate 2b and facing in the opposite direction to the sealing resins 4a and 4b.
  • each output terminal 13a, 13b, 14a, 14b is not covered at all with the insulating coating resin 23, and each output terminal 13a, 13b, 14a, 14b is covered with each double-sided adhesive tape 5a, 5b or each As a result, a part of each sealing resin 4a, 4b in contact with or close to each output terminal 13a, 13b, 14a, 14b is yellowed over a long period of time. Discolored.
  • each output terminal 13a, 13b, 14a, 14b is covered with the insulating coating resin 23, and the coating range with the insulating coating resin 23 is set between the double-sided adhesive tapes 5a, 5b.
  • a part of each sealing resin 4a, 4b in contact with or close to each output terminal 13a, 13b, 14a, 14b tended to yellow or discolor. .
  • each output terminal 13a, 13b, 14a, 14b In the vicinity, the sealing resins 4a and 4b did not turn yellow or discolored even after a long period of time, and a clear improvement in weather resistance could be confirmed.
  • the yellowing or discoloration of the sealing resins 4a and 4b is caused by the oxidation of the sealing resins 4a and 4b by oxygen contained in moisture that has penetrated along the surfaces of the output terminals 13a, 13b, 14a, and 14b. Presumed to have occurred.
  • FIG. 15 is an enlarged cross-sectional view of the connection bus bar 7.
  • the connection bus bar 7 includes a strip-shaped first bar member 7 a and a second bar member 7 b, and the first and second bar members 7 a and 7 b are overlapped via an insulating member 24.
  • the first and second bar members 7 a and 7 b and the insulating member 24 overlap in a direction orthogonal to the light receiving surface of each solar cell 3.
  • the first and second bar members 7a and 7b are, for example, those obtained by performing solder plating on the surface of a strip-shaped copper material, and their length, thickness, and width are the same.
  • the insulating member 24 has a belt-like shape like the insulating member 22, and is formed by forming, for example, a 30 ⁇ m thick epoxy adhesive layer on both sides of a 25 ⁇ m thick polyimide film, and a first bar on each side. The member 7a and the second bar member 7b are bonded and held.
  • the width of the insulating member 24 is set wider than the width of the first and second bar members 7a and 7b.
  • the insulating member 24 protrudes from both end portions of the first and second bar members 7a, 7b, and from one end portion of the first and second bar members 7a, 7b facing the vertical side 1a.
  • the portion of the insulating member 24 that protrudes greatly is folded and bonded to one side of the second bar member 7b.
  • the first and second bar members 7a and 7b are not easily displaced and the first and second bar members 7a and 7b are insulated even if a displacement of an error level occurs.
  • the member 24 is surely insulated.
  • the first and second bar members 7 a and 7 b are covered with an insulating coating resin 25.
  • the insulating coating resin 25 is obtained by forming an adhesive layer with a thickness of 10 ⁇ m on one side of a PET film with a thickness of 50 ⁇ m. Thereby, the insulation of the 1st and 2nd bar members 7a and 7b is improved more.
  • the positive electrode bus bar 11, the negative electrode bus bar 12, the positive electrode output terminals 13a and 13b, the negative electrode output terminals 14a and 14b, the connection bus bar 7, and the auxiliary bar member 26 are all soldered to the surface of the strip-shaped copper material. Since they are plated, there is uneven color gloss on their surfaces, which may impair the design of the solar cell module 1. However, when most of each bus bar 7, 11, 12, each output terminal 13a, 13b, 14a, 14b, and auxiliary bar member 26 are covered with the insulating coating resin 23, 25, the uneven color gloss on the surface is visually recognized. Thus, the design of the solar cell module 1 is not impaired.
  • the color of the insulating coating resins 23 and 25 is close to the color of each solar battery cell 3, and the solar cell module 1 having a unified feeling. Appearance can be obtained.
  • black PET films may be applied, or transparent PET films may be applied.
  • the manufacturing procedure of the solar cell module 1 of the present embodiment will be described in order, divided into a preliminary process, a mounting process, and a sealing process.
  • the preliminary process two solar battery strings formed by connecting a plurality of solar battery cells 3 in series through respective interconnectors 6 are prepared.
  • the positive electrode bus bar 11 and the negative electrode bus bar 12 are overlapped via the insulating member 22, and the first bar member 12a and the auxiliary bar member 26 of the negative electrode bus bar 12 are overlapped via the insulating member 27 to insulate.
  • the positive electrode bus bar 11, the negative electrode bus bar 12, the auxiliary bar member 26, and the like are covered with the coating resin 23.
  • the first and second bar members 7 a and 7 b of the connection bus bar 7 are overlapped via the insulating member 24, and the connection bus bar 7 and the like are covered with the insulating coating resin 25.
  • the sealing resin 4a is placed on the light receiving surface glass plate 2a and overlapped.
  • the sealing resin 4a has a vertical width and a horizontal width that are smaller than the width of the double-sided adhesive tapes 5a and 5b by the width of the double-sided adhesive tape 5a and 5b.
  • the double-sided adhesive tapes 5a and 5b are arranged so as to recede inward from the side by the width of the double-sided adhesive tape 5a and 5b.
  • two solar battery strings formed by connecting a plurality of solar battery cells 3 in series on the sealing resin 4a are arranged in the first and second rows R1 and R2, and covered with the insulating coating resin 23.
  • the positive electrode bus bar 11, the negative electrode bus bar 12, and the auxiliary bar member 26 are arranged, and the connection bus bar 7 covered with the insulating coating resin 25 is arranged.
  • a bus bar 7 for connection is arranged in parallel with the vertical side 1a of the solar cell module 1 and in the vicinity of one end of the first and second rows R1 and R2.
  • the connecting bus bar 7 has a three-layer structure including the first and second bar members 7a and 7b and the insulating member 24.
  • the heat of 7a is conducted and dispersed to the second bar member 7b and the insulating member 24, the temperature of the first bar member 7a is quickly reduced, and the insulating coating resin 25 and the sealing resin are heated by the heat of the first bar member 7a. 4a is not melted by heating. Moreover, since the insulating coating resin 25 and the sealing resin 4a that cover the second bar member 7b are not heated and melted, the design of the solar cell module 1 when viewed from the light-receiving surface glass plate 2a side is impaired. Absent.
  • the insulating coating resin 23 covering 11a is cut out to expose the solder surface of the first bar member 11a, and each interconnector 6 is soldered to the solder surface at the two connection locations of the first bar member 11a.
  • the heat of the first bar member 11a due to the soldering is conducted and dispersed to the first bar member 12a and the first insulating member 22a of the negative electrode bus bar 12, and the temperature of the first bar member 11a quickly decreases.
  • the insulating coating resin 23 and the sealing resin 4a are not heated and melted by the heat of the first bar member 11a, and the design of the solar cell module 1 when viewed from the light receiving surface glass plate 2a side is not impaired. That's it.
  • the first bar of the negative electrode bus bar 12 is connected to the two interconnectors 6 derived from the negative electrodes of the solar cells 3 at the other end of the second row R2.
  • the insulating coating resin 23 covering the member 12a is cut off to expose the solder surface of the first bar member 12a, and each interconnector 6 is soldered to the solder surface at the two connection locations of the first bar member 12a.
  • the heat of the first bar member 12a due to soldering is conducted and dispersed to the auxiliary bar member 26 and the insulating member 27, and the temperature of the first bar member 12a quickly decreases, and the heat of the first bar member 12a.
  • the insulating coating resin 23 and the sealing resin 4a are not heated and melted, and the design of the solar cell module 1 when viewed from the light receiving surface glass plate 2a side is not impaired.
  • the excision work of the insulating coating resins 23 and 25 can be performed in a preliminary process.
  • each interconnector 6 protrudes from one end of each first bar member 7a, 11a, 12a.
  • the protruding portion 6a is cut using a tool such as a nipper. At this time, although the tool approaches the first insulating member 22a, the insulating member 24, or the insulating member 27, the first insulating member 22a, the insulating member 24, or the insulating member 27 is folded at one end portion thereof.
  • the first insulating member 22a, the insulating member 24, or the insulating member 27 is not cut by a tool, and due to the cutting, the first bar member 11a of the positive electrode bus bar 11 and the negative electrode bus bar 12 Contact or short circuit between the first bar member 12a, contact or short circuit between the first bar member 7a and the second bar member 7b of the connecting bus bar 7, or contact or short circuit between the auxiliary bar member 26 and the first bar member 12a. It never happens.
  • the first bar member 11a of the positive electrode bus bar 11 and the first bar member 12a of the negative electrode bus bar 12 should not be contacted or short-circuited, but the first bar member 7a and the second bar member of the connecting bus bar 7 should be avoided.
  • Contact or short circuit with 7b or contact or short circuit between the auxiliary bar member 26 and the first bar member 12a does not cause a problem.
  • the double-sided adhesive tape 5a is attached to the end of the light-receiving surface glass plate 2a. Since the sealing resin 4a is disposed so as to recede from the sides of the light-receiving surface glass plate 2a by the width of the double-sided adhesive tapes 5a and 5b, the double-sided adhesive tape 5a is disposed at the end of the light-receiving surface glass plate 2a. Can be pasted on.
  • the double-sided adhesive tape 5a is inserted between each positive electrode output terminal 13a, 13b and the end of the light-receiving surface glass plate 2a, and the double-sided adhesive tape 5a is inserted between each negative electrode output terminal 14a, 14b and the light-receiving surface glass plate 2a. It inserts between end parts, and the front-end
  • the double-sided adhesive tape 5b is superposed and pasted on the double-sided adhesive tape 5a, and the double-sided adhesive tapes 5a and 5b are provided at the ends of the light-receiving surface glass plate 2a, and the tips of the positive electrode output terminals 13a and 13b and the negative electrode outputs.
  • the tips of the terminals 14a and 14b are projected outside the light-receiving surface glass plate 2a through the spaces between the double-sided adhesive tapes 5a and 5b.
  • the sealing resin 4b is overlaid.
  • the sealing resin 4b has the same size as the sealing resin 4a, and is disposed so as to recede inward from the sides of the light-receiving surface glass plate 2a by the width of the double-sided adhesive tapes 5a and 5b. For this reason, the double-sided adhesive tape 5b is exposed without being covered with the sealing resin 4b. And on the sealing resin 4b and the double-sided adhesive tape 5b, it puts on the back surface glass plate 2b, overlaps, and the edge part of the back surface glass plate 2b is adhere
  • each photovoltaic cell 3, each sealing resin 4a, 4b, the bus bar 7 for connection, the positive electrode bus bar 11, the negative electrode bus bar 12, etc. are inserted
  • each sealing resin 4a, 4b is surrounded and held by each double-sided adhesive tape 5a, 5b, and each solar cell 3, the connecting bus bar 7, the positive electrode bus bar 11, between each sealing resin 4a, 4b, The negative electrode bus bar 12 and the like are sandwiched and held. For this reason, even if the solar cell module 1 is transported in order to perform the next sealing step, misalignment of each sealing resin 4a, 4b, each solar cell 3, each bus bar 7, 11, 12, etc. occurs. There is nothing wrong.
  • the solar cell module 1 is sealed using a laminator device.
  • the solar cell module 1 processed in the placing process is placed on the heater plate of the chamber chamber of the laminator device with the light-receiving surface glass plate 2a facing downward.
  • the chamber chamber is evacuated, the heater plate is heated to a specified temperature, the solar cell module 1 is heated, and this state is maintained for a certain time.
  • the air between the light-receiving surface glass plate 2a and the back glass plate 2b and the air contained in the sealing resins 4a and 4b are exposed to the outside through the double-sided adhesive tapes 5a and 5b at the ends of the glass plates 2a and 2b.
  • each sealing resin 4a, 4b softens, and each solar cell 3, the connection bus bar 7, the positive electrode bus bar 11, the negative electrode bus bar 12, etc. are sealed by each sealing resin 4a, 4b.
  • the double-sided adhesive tapes 5a and 5b prevent the softened sealing resins 4a and 4b from protruding from the ends of the glass plates 2a and 2b.
  • the folded portions of the first and second insulating members 22a and 22b and the insulating members 24 and 27 are on one side of the positive electrode bus bar 11 facing the outside of the solar cell module 1 (vertical sides 1a, 1b, horizontal side 1c). Since the end portion, the one end portion of the negative electrode bus bar 12, the one end portion of the connecting bus bar 7, and the one end portion of the auxiliary bar member 26 are overlapped and bulky, the air between the sealing resins 4a and 4b is difficult to escape. It has become. However, in the daylighting type solar cell module 1, it is necessary to increase the thickness of each sealing resin 4a, 4b in order to prevent cracking of the light receiving surface glass plate 2a and the back surface glass plate 2b.
  • the processing time for heating and evacuation by the laminator device is longer than that of other types of solar cell modules that are not of the daylighting type, the first and second insulating members 22a and 22b and the insulating members 24 and 27 are Even if it is folded back, the air can be surely removed.
  • the chamber chamber is returned to the atmospheric pressure, and the solar cell module 1 Is pressurized at 1 atm to improve and stabilize the contact state of the sealing resins 4a and 4b, and then the solar cell module 1 is taken out from the chamber chamber.
  • the curing process is a process that is required when EVA is applied as each of the sealing resins 4a and 4b, and is a process of stabilizing the sealing state by advancing EVA cross-linking reaction.
  • the solar cell module 1 is a laminator. The heating time may be extended while being placed on the heater plate of the apparatus, or a heat treatment apparatus may be prepared separately.
  • the tips of the positive electrode output terminals 13a and 13b and the tips of the negative electrode output terminals 14a and 14b are sandwiched between the light-receiving surface glass plate 2a and the back glass plate 2b. It is drawn out between each double-sided adhesive tape 5a, 5b, but four holes are formed at the end of the back glass plate 2b, and the tip of each positive output terminal 13a, 13b and the tip of each negative output terminal 14a, 14b. May be pulled out through these holes.
  • the positive electrode box 15, the negative electrode box 16, and the diode box 17 can be provided on the outer surface of the end portion of the back glass plate 2b.
  • the solar cell module (solar cell module 1) of the present invention connects a plurality of solar cells (solar cells 3) to each other, and generates power generated by each of the solar cells.
  • a solar cell module that outputs power through bus bars (positive electrode bus bar 11 and negative electrode bus bar 12), wherein the bus bar includes L-shaped first bar members (first bar members 11a and 12a) and second bar members. (Second bar member 11b, 12b), the first bar member is disposed along one side (vertical side 1b) of the solar cell module and connected to the electrode of the solar cell, and the second bar member Is arranged along the other side (lateral side 1c) of the solar cell module orthogonal to the one side.
  • the bus bar which consists of the 1st bar member and the 2nd bar member which form L-shape
  • the 1st bar member is arranged along one side of a solar cell module, and it serves as an electrode of a photovoltaic cell.
  • the second bar member is connected along the other side of the solar cell module orthogonal to the one side. For this reason, the generated power of each solar cell can be taken out from either one side or the other side (short side and long side) of the solar cell module, and the degree of freedom of the connection configuration of each solar cell increases.
  • the connection configuration can be simplified.
  • output terminals (positive output terminals 13a and 13b and negative output terminals 14a and 14b) for outputting the generated power of each of the solar cells are connected to the second bar member.
  • output terminals for outputting the generated power of each of the solar cells are connected to the second bar member.
  • the bus bar includes a positive electrode bus bar (positive electrode bus bar 11) and a negative electrode bus bar (negative electrode bus bar 12), and the first bar member (first bar member 11a) of the positive electrode bus bar,
  • the second bar member (second bar member 11b) and the first bar member (first bar member 12a) and second bar member (second bar member 12b) of the negative electrode bus bar are insulated members (insulating member 22).
  • the first bar member of the positive electrode bus bar and the first bar member of the negative electrode bus bar are arranged along one side (vertical side 1b) of the solar cell module.
  • the second bar member of the positive electrode bus bar and the second bar member of the negative electrode bus bar are arranged along the other side (lateral side 1c) of the solar cell module which is perpendicular to the sides.
  • the daylighting rate is (amount of light transmitted through the solar cell module) / (amount of light incident on the solar cell module).
  • the output terminal or the bypass diode (bypass diode 21) is provided on the other side.
  • the output terminals and the bypass diodes are collected and provided on the other side of the solar cell module in this manner, the output terminals and the bypass diodes can be easily hidden by a window frame or the like.
  • the insulating member is folded back at the side end of the positive electrode bus bar or the side end of the negative electrode bus bar to cover the side end.
  • the bus bar is covered with an insulating coating resin (insulating coating resin 23). Thereby, the insulation of a bus bar is further improved.
  • the said solar cell module is between the two translucent plates (light-receiving surface glass plate 2a, back glass plate 2b) which pinches
  • Output terminals connected to the second bar member from between the double-sided adhesive tapes on the other side, with two double-sided adhesive tapes (respectively double-sided adhesive tapes 5a and 5b) attached to each other (Positive electrode output terminals 13a and 13b and negative electrode output terminals 14a and 14b) are led out of the light transmitting plates.
  • connection bus bar 7 for connecting the solar cells
  • the other bus bar includes two bar members (first bar member 7a, second bar member). 7b), and each bar member is overlapped in a direction orthogonal to the light receiving surface of the solar battery cell via an insulating member (insulating member 24).
  • insulating member 24 insulating member 24
  • FIG. 18 is a plan view of the structure of the solar cell module 100 of the present embodiment as viewed from the light receiving surface side.
  • the light receiving surface is a surface on the side where the solar battery cell receives light in order to convert light energy into electric power.
  • a plurality of solar cells 102 are electrically connected in series using the internal wiring 104 to form a solar cell string 105, and a plurality of solar cells The string 105 was electrically connected.
  • the solar cell module 100 has two extraction electrodes 141 on the positive electrode side and the negative electrode side. One end of each extraction electrode 141 is electrically connected to the solar battery cell, and although not shown in the figure, one end on the opposite side of the extraction electrode is connected to the terminal box.
  • the solar cell module 100 is quadrangular when viewed from the light receiving surface side, and has two sets of opposite ends.
  • the protrusion prevention wall 103 was disposed at a pair of opposing ends including the end from which the extraction electrode 141 was taken out of the solar cell module 100.
  • the protrusion prevention wall 103 is an elongated, substantially rectangular parallelepiped, and has a length that covers the end of the solar cell module.
  • As the solar battery cell 102 a solar battery cell using a substantially rectangular single crystal silicon substrate having a side length of about 156 mm was used.
  • the thickness of the single crystal silicon substrate is about 200 ⁇ m.
  • a solar cell using a single crystal silicon substrate is used, but a solar cell using a polycrystalline silicon substrate may be used.
  • the distance between the solar cells was set to about 15 mm, and the distance between the solar cells and the end of the solar cell module was set to about 50 mm. Each distance need not be limited to this value, and can be changed according to the design.
  • FIG. 19 is a cross-sectional view taken along the line AA ′ in the drawing of the solar cell module shown in FIG. 18,
  • FIG. 20 is a cross-sectional view taken along the line BB ′, and
  • FIG. It is an expanded sectional view of the part.
  • a plurality of electrically connected solar cells 102 are sealed between a light receiving surface side glass 106 and a non-light receiving surface side glass 107 with a sealing resin 108.
  • the structure. Adjacent solar cells 102 are connected in series by internal wiring 104.
  • the protrusion prevention wall 103 was disposed between the light receiving surface side glass 106 and the non-light receiving surface side glass 107 at a pair of opposed end portions of the solar cell module 100.
  • the protrusion prevention wall 103 is configured by arranging two protrusion prevention walls of the light receiving surface side protrusion prevention wall 131 and the non-light receiving surface side protrusion prevention wall 132 so as to overlap each other in the thickness direction of the solar cell module 100.
  • a foam made of an acrylic resin was used as an overflow prevention wall.
  • the protrusion prevention wall is not limited to acrylic resin, and urethane resin, silicone resin, and butyl rubber may be used. Moreover, it is not limited to a foam.
  • the light receiving surface side protrusion prevention wall 131 has adhesive layers 133 and 134, and the adhesive layer 133 is bonded to the non-light receiving surface side of the light receiving surface side glass 106.
  • the non-light-receiving surface side protrusion prevention wall 132 has adhesive layers 135 and 136, and the adhesive layer 136 is bonded to the light-receiving surface side of the non-light-receiving surface side glass 107. Further, the adhesive layer 134 is bonded to the adhesive layer 135.
  • the width t of the protrusion prevention wall 103 was about 9 mm.
  • the width t is preferably 5 mm or more and 10 mm or less.
  • the protrusion prevention wall has a function of preventing the sealing resin 108 from protruding from the end portion of the solar cell module in the sealing step.
  • the width t is smaller than 5 mm, it does not have a sufficient protrusion prevention function, so that it is preferably 5 mm or more.
  • region with a protrusion prevention wall becomes an area
  • the region having the protrusion prevention wall is a region that does not contribute to the daylighting, so that the daylighting rate does not increase. Therefore, it is not desirable to make the width t too large.
  • the daylighting solar cell module is often used as a building window. When used as a window, it is desirable from the viewpoint of design that the protrusion prevention wall at the end of the solar cell module is hidden by a window sash. For this reason, the width t is desirably 10 mm or less.
  • the sealing resin 108 was used as the sealing resin 108.
  • the sealing resin is desirably a resin having a high transmittance in the visible light region. Resins such as ionomer resins and olefin resins can also be used.
  • tempered glass having a thickness of about 4 mm was used.
  • the thickness of the glass is not limited to 4 mm, and double tempered glass, untempered glass, or the like may be used.
  • each solar battery cell 102 has an internal wiring 104 on each of the light receiving surface side and the non-light receiving surface side.
  • no protruding prevention wall is disposed at two opposing ends adjacent to the end from which the extraction electrode 141 is drawn.
  • the extraction electrode 141 extends from the end of the solar cell module to the outside of the solar cell module.
  • the extraction electrode 141 is drawn to the outside through the space between the light receiving surface side protrusion prevention wall 131 and the non-light receiving surface side protrusion prevention wall 132.
  • the extraction electrode 141 can be drawn out of the solar cell module substantially parallel to the light receiving surfaces of the light receiving surface side glass 106 and the non-light receiving surface side glass 107. Therefore, it has become possible to prevent the extraction electrode 141 from being bent at the end of the solar cell module 100 and applying a local load.
  • the extraction electrode 141 is fixed by the adhesive layer of the protrusion prevention wall 131 and the protrusion prevention wall 132, it is possible to prevent displacement in the direction parallel to the light receiving surface of the extraction electrode 141.
  • FIG. 22 is a plan view of the solar cell module of the present embodiment as viewed from the light receiving surface side
  • FIG. 23 is a cross-sectional view for explaining the method of manufacturing the solar cell module of the present embodiment.
  • FIGS. 23 (a), (b), and (c) show the protrusion prevention wall arranging step, the placing step, and the sealing step, respectively, corresponding to the view along the line DD 'in FIG. To do.
  • a plurality of solar cells were electrically connected in series with internal wiring to form a solar cell string.
  • a tin-plated copper wire having a thickness of about 0.2 mm was used as the internal wiring. Soldering was used for the connection between the solar cell and the internal wiring. You may connect with an electrically conductive paste.
  • a plurality of solar cell strings were electrically connected.
  • a connection member having a thickness of about 0.2 mm was used to connect the plurality of solar cell strings.
  • the protrusion prevention wall arrangement process will be described with reference to FIG.
  • the light-receiving surface side protrusion prevention wall 131 On the non-light-receiving surface side of a pair of opposing ends of the light-receiving surface side glass 106, the light-receiving surface side protrusion prevention wall 131 is placed.
  • the light receiving surface side protrusion prevention wall 131 was made of an acrylic resin foam having an adhesive layer. Since the light receiving surface side protrusion prevention wall 131 has an adhesive layer, the light receiving surface side glass 106 is less likely to be displaced when placed on the non-light receiving surface side of the light receiving surface side glass 106 and can be placed at an accurate location. Furthermore, it is possible to prevent the protrusion prevention wall from moving and causing a position shift when transporting to the next step.
  • a sealing resin 181 was disposed between the light receiving surface side protruding walls 131 disposed on the non-light receiving surface side of a pair of opposing ends of the light receiving surface side glass 106.
  • sheet-like EVA was used as the sealing resin 181.
  • the solar battery cell 102 was disposed on the solar battery cell 102 in a state where a plurality of solar battery strings were electrically connected. At that time, the end of the extraction electrode 141 opposite to the end electrically connected to the solar battery cell is exposed to the outside of the solar battery module.
  • the non-light-receiving surface side protrusion prevention wall 132 was disposed on the extraction electrode 141.
  • the light receiving surface side protrusion preventing wall 131 and the non-light receiving surface side protrusion preventing wall 132 are bonded to each other by the respective adhesive layers 134 and 135, and the periphery of the extraction electrode 141 is almost free of gaps. Since there is no gap due to the adhesive layer, it is possible to prevent the sealing resin from protruding from the periphery of the extraction electrode 141.
  • the non-light-receiving surface side protrusion prevention wall 132 was also arranged on the light receiving surface side protrusion prevention wall 131 at the end portion opposite to the end portion from which the extraction electrode 141 was drawn.
  • the sealing resin 182 was disposed on the solar battery cell 102. Since the protrusion prevention wall is arranged at the opposite end of the light receiving surface side glass 106, it is difficult for the sealing resins 181 and 182 to be displaced, and the sealing resin can be arranged at an accurate location. . Furthermore, the sheet-like EVA used as the sealing resin had a low adhesiveness with the glass before heating, so that the positional deviation was likely to occur after the arrangement, but the positional deviation after the sealing resin was arranged due to the protrusion prevention wall. The effect that it becomes difficult to occur was also obtained.
  • the non-light-receiving surface side protrusion prevention wall 132 After the non-light-receiving surface side protrusion prevention wall 132 was disposed, the non-light-receiving surface side glass 107 was disposed. Since the protrusion preventing walls 131 and 132 have an adhesive layer, the light receiving surface side glass 106 and the non-light receiving surface side glass 107 can be temporarily fixed via the protrusion preventing wall.
  • the protruding prevention wall having adhesiveness at the opposite end of the solar cell module.
  • the extraction electrode 141 drawn out of the solar cell module was bent along the end surface of the non-light-receiving surface side glass 107, and further bent along the non-light-receiving surface side of the non-light-receiving surface side glass 107. This is to prevent the shape of the extraction electrode 141 from being deformed when pressure is applied in the next sealing step. In addition, there is also an effect of preventing the extraction electrode 141 from being caught on the transfer device during transfer to the next step.
  • the extraction electrode 141 may be fixed to the non-light-receiving surface side of the non-light-receiving surface side glass 107 with a Teflon (registered trademark) tape or the like. By fixing, the extraction position of the extraction electrode 141 becomes more stable.
  • the sheet-like EVA used as the sealing resins 181 and 182 may be one sheet or plural sheets. What is necessary is just to determine according to the design value of the distance between the light-receiving surface side glass 106 and the non-light-receiving surface side glass 107 after sealing.
  • the solar cell and internal wiring must be securely buried, so the distance between the glass on the light-receiving surface side and the non-light-receiving surface side is a thin film silicon solar cell. It needs to be larger than
  • the protrusion prevention wall two of the light receiving surface side protrusion prevention wall 131 and the non-light receiving surface side protrusion prevention wall 132 were arranged in an overlapping manner. It is desirable that the number of the overhang prevention walls arranged in a stack is two. This is because the manufacturing process does not increase.
  • the sealing process will be described with reference to FIG. Using a laminator device, which is a sealing device, the solar cell module was sealed while being heated.
  • the solar cell module placed in the placing step was placed on the heater plate heated to 155 ° C. of the laminator device with the light receiving surface side facing down. Since the sealing resin was thick, the heating temperature was set high.
  • the upper chamber and lower chamber of the laminator device were depressurized with the same pressure. By this operation, air was removed from each joint surface, and bubbles contained in the sealing resin 108 were removed. The depressurization was performed for a long time as compared with the case where no protrusion prevention wall was arranged. Even when the protrusion prevention wall was arranged, it was possible to remove air from each joint surface and remove bubbles contained in the sealing resin. This is presumed to be because the adhesive layer of the protrusion prevention wall has air permeability.
  • the adhesive layer is composed of two layers: a layer that adheres to the light receiving surface side glass 106 and a layer that adheres to the non-light receiving surface side glass 107. . It is presumed that the number of adhesive layers is increased and pressure reduction is facilitated by arranging the protrusion prevention walls in an overlapping manner.
  • the pressure is increased to 1 atm, and by maintaining the pressurized state, the adhesion between the light receiving surface side glass 106 and the non-light receiving surface side glass 107 through the sealing resin 108 is improved. Improved.
  • a curing step may be inserted after the sealing step.
  • the curing step is a step required when EVA is used as the sealing resin, and is a step of stabilizing the sealing state by advancing the EVA crosslinking reaction.
  • the curing step may be performed using a heat treatment apparatus, or a method of increasing the heating time while being placed on the laminating apparatus.
  • FIG. 24 shows a diagram for explanation. This corresponds to an enlarged cross-sectional view of the extraction portion C of the extraction electrode in FIG.
  • FIG. 24A is a diagram illustrating the first comparative example
  • FIG. 24B is a diagram illustrating the second comparative example.
  • the solar cell module manufactured using this embodiment is taken as an example, and samples created for comparison are taken as comparative example 1 and comparative example 2.
  • the difference between the example and the comparative example 1 is that the comparative example 1 did not arrange the protrusion prevention wall and did not bend the extraction electrode in the arrangement step.
  • the difference between the example and the comparative example 2 is that the comparative example 2 did not arrange the protrusion preventing wall in the arranging step.
  • Comparative Example 1 in which the sealing process was performed without disposing the protrusion prevention wall and without bending the extraction electrode, as shown in FIG. 24A, between the light receiving surface side glass 161 and the non-light receiving surface side glass 171 A certain sealing resin 183 protrudes from the end of the solar cell module and adheres around the extraction electrode 142. It was very difficult to remove the sealing resin adhered around the extraction electrode 142. Furthermore, the extraction electrode 142 was bent and could not be extracted parallel to the light receiving surfaces of the light receiving surface side glass 161 and the non-light receiving surface side glass 171.
  • Comparative Example 2 in which the lead-out electrode is bent and the protrusion prevention wall is not disposed, sealing is performed between the light-receiving surface side glass 162 and the non-light-receiving surface side glass 172 as shown in FIG.
  • the stop resin 184 protrudes from the end portion of the solar cell module and adheres to the periphery of the bent extraction electrode 143. Similar to Comparative Example 1, it was very difficult to remove the sealing resin adhered around the extraction electrode 143. Furthermore, it is difficult to make the extraction electrode 143 parallel to the light receiving surfaces of the light receiving surface side glass 162 and the non-light receiving surface side glass 172 after removing the sealing resin adhered around the extraction electrode 143.
  • FIG. 25 shows another example of the present embodiment. 25 (a), (b), and (c) show a protrusion prevention wall arranging step, a placing step, and a sealing step, respectively.
  • the spacer 109 is arranged outside the end portion where the protrusion prevention wall of the solar cell module is arranged.
  • a substantially rectangular parallelepiped made of silicone resin was used as the spacer 109.
  • the material of the spacer 109 is not limited to silicone resin, and Teflon (registered trademark), epoxy, glass, metal, or the like can be used. Moreover, the composite of these materials may be sufficient. For example, you may use the spacer which covered the substantially rectangular parallelepiped copper with the silicone resin.
  • the spacer is not necessarily in contact with the end of the solar cell module, and for example, the solar cell module and the spacer may be arranged to be several mm apart.
  • the sealing process was also performed with the spacers arranged. By arranging the spacer, it is possible to prevent the distribution from occurring in the thickness of the solar cell module.
  • the structure in which two protrusion prevention walls are stacked has been described.
  • the present invention is not limited to two, and includes three or more cases. It is presumed that the decompression time in the sealing process can be shortened by increasing the number of overhanging prevention walls.
  • the number of solar cells constituting the solar cell string and the number of solar cell strings constituting the solar cell module are not limited to the numbers shown in the present embodiment, and may be designed as necessary. .
  • the third embodiment is different from the second embodiment in that at least a part of the extraction electrode is covered with a protective film.
  • the same components as those in the second embodiment are denoted by the same member numbers, and detailed description thereof is omitted.
  • FIG. 26 is a plan view of the solar cell module 110 manufactured in the present embodiment as viewed from the light receiving surface side.
  • the extraction electrode 141 partially covered with the protective film 144 was extracted from between the adjacent protrusion prevention walls to the outside of the solar cell module 110.
  • the external connection cable 112 and the solar battery cell were electrically connected.
  • FIG. 27 is an enlarged cross-sectional view of the extraction portion F of the extraction electrode in FIG.
  • the extraction electrode 141 passes between the light-receiving surface side protrusion prevention wall 131 and the non-light-receiving surface side protrusion prevention wall 132 sandwiched between the light-receiving surface side glass 106 and the non-light-receiving surface side glass 107 and passes through the solar cell module 110.
  • a part of the extraction electrode 141 is covered with a protective film 144.
  • the protective film 144 is covered except for the location where the extraction electrode 141 is electrically connected to the solar battery cell and the location where the extraction electrode 141 is electrically connected to the terminal block.
  • the terminal box 111 is bonded to the end of the solar cell module with an adhesive 114. It is desirable that the extraction electrode 141 is covered up to the place inside the casing of the terminal box 111. In this embodiment, the light-receiving surface side glass or the non-light-receiving surface side glass is covered with a protective film up to about 3 mm from the end surface.
  • the extraction electrode 141 has such a structure, bending at the end surface of the light-receiving surface side glass or the non-light-receiving surface side glass, in particular, at the portion where the adhesive 114 is present is less likely to occur. This is because the thickness of the extraction electrode 141 is increased by the protective film 144.
  • the extraction electrode is locally bent, cracks may occur at the bent portion of the extraction electrode when repeated temperature changes are applied to the solar cell module. That is, when a solar cell module having a local bend in the extraction electrode is used outdoors for a long time, the extraction electrode may be broken. By covering the extraction electrode with a protective film, local bending can be prevented and long-term reliability of the solar cell module can be secured.
  • the extraction electrode 141 may become highly resistant due to corrosion and generate heat.
  • heat is generated inside the adhesive, the heat is transmitted to the light-receiving surface side glass and the non-light-receiving surface side glass, which may lead to glass breakage.
  • the extraction electrode 141 is covered with a protective film 144 from the end face of the solar cell module to a portion in contact with the sealing resin 108 on the inner side (the side with the sealing resin).
  • the sealing resin may turn yellow or discolor at the place where the extraction electrode and the sealing resin are in direct contact. No yellowing or discoloration was observed by covering the extraction electrode. This is presumably because the sealing resin is no longer oxidized by oxygen in the air that has entered along the surface of the extraction electrode.
  • the protective film 144 it is desirable to use a highly stable insulating member such as polyimide as the protective film 144.
  • a highly stable insulating member such as polyimide
  • the weather resistance of the solar cell module can be further improved, the risk of electric shock can be further reduced, and the safety of the solar cell module can be improved.
  • FIG. 28 is a plan view of the solar cell module 200 manufactured according to the present embodiment as viewed from the light receiving surface side.
  • the protrusion prevention wall 203 was disposed at a pair of opposed end portions that are substantially parallel to the internal wiring 104 constituting the solar cell string 105.
  • the protrusion prevention wall 203 is an elongated, substantially rectangular parallelepiped, and has a length that covers the end of the solar cell module.
  • FIG. 29 is a cross-sectional view taken along the line AA ′ in the drawing of the solar cell module shown in FIG. 28, and
  • FIG. 30 is a cross-sectional view taken along the line BB ′.
  • the solar cell module 200 encapsulates a plurality of electrically connected solar cells 102 with a sealing resin 108 between a light receiving surface side glass 106 and a non-light receiving surface side glass 107.
  • the structure was as follows.
  • Each solar battery cell 102 has an internal wiring 104 on each of the light receiving surface side and the non-light receiving surface side.
  • the protrusion prevention wall 203 was disposed between the light receiving surface side glass 106 and the non-light receiving surface side glass 107 at a pair of opposed end portions of the solar cell module 200.
  • the protrusion prevention wall 203 is formed by arranging two protrusion prevention walls of the light receiving surface side protrusion prevention wall 231 and the non-light receiving surface side protrusion prevention wall 232 in the thickness direction of the solar cell module 200.
  • a foam made of an acrylic resin was used as an overflow prevention wall.
  • the resin is not limited to acrylic resin, and urethane resin, silicone resin, and butyl rubber may be used. Moreover, it is not limited to a foam.
  • the light receiving surface side protrusion prevention wall 231 has adhesive layers 233 and 234, and the adhesive layer 233 is bonded to the non-light receiving surface side of the light receiving surface side glass 106.
  • the non-light-receiving surface side protrusion prevention wall 232 has adhesive layers 235 and 236, and the adhesive layer 236 is bonded to the light-receiving surface side of the non-light-receiving surface side glass 107. Further, the adhesive layer 234 is bonded to the adhesive layer 235.
  • the width t of the protrusion prevention wall 203 was about 9 mm.
  • the width t is preferably 5 mm or more and 10 mm or less.
  • the protrusion prevention wall has a function of preventing the sealing resin 108 from protruding from the end portion of the solar cell module in the sealing step.
  • the width t is smaller than 5 mm, it does not have a sufficient protrusion prevention function, so that it is preferably 5 mm or more.
  • region with a protrusion prevention wall becomes an area
  • the region having the protrusion prevention wall is a region that does not contribute to the daylighting, so that the daylighting rate does not increase. Therefore, it is not desirable to make the width t too large.
  • the daylighting solar cell module is often used as a building window. When used as a window, it is desirable from the viewpoint of design that the protrusion prevention wall at the end of the solar cell module is hidden by a window sash. For this reason, the width t is desirably 10 mm or less.
  • FIG. 30 when viewed in a cross section along the line BB ′, adjacent solar cells 102 are connected in series by an internal wiring 104.
  • no protruding prevention wall is arranged at one end of the both sides in the direction in which a plurality of solar cells constituting the solar cell string are connected.
  • FIG. 31 is a cross-sectional view for explaining the method for manufacturing the solar cell module of the present embodiment.
  • FIGS. 31A, 31B, and 31C show the protrusion prevention wall placement process, the placement process, and the sealing process, respectively, and correspond to the cross section along the line AA ′ in FIG. To do.
  • a plurality of solar cells were electrically connected in series with internal wiring to form a solar cell string.
  • a tin-plated copper wire having a thickness of about 0.2 mm was used as the internal wiring. Soldering was used for the connection between the solar cell and the internal wiring. You may connect with an electrically conductive paste.
  • a plurality of solar cell strings were electrically connected.
  • a connection member having a thickness of about 0.2 mm was used to connect the plurality of solar cell strings.
  • the protrusion prevention wall arrangement process will be described with reference to FIG.
  • the light-receiving surface side protrusion wall 231 and the non-light-receiving surface side protrusion wall 232 are placed in this order. It is desirable that the number of the overhang prevention walls arranged in a stack is two. This is because the manufacturing process is not complicated. Acrylic resin foam having an adhesive layer was used for both the light receiving surface side protrusion prevention wall 231 and the non-light receiving surface side protrusion prevention wall 232.
  • the light receiving surface side protrusion prevention wall 231 has an adhesive layer, the light receiving surface side glass 106 is not easily displaced when placed on the non-light receiving surface side, and can be placed at an accurate location. Further, the same effect was obtained when the non-light-receiving surface side protrusion prevention wall 232 was disposed on the light-receiving surface side protrusion prevention wall 231. In addition, it is possible to prevent the protrusion prevention wall from moving and causing a position shift when transporting to the next step.
  • a sealing resin 181 is disposed between the protrusion-preventing walls disposed on the non-light-receiving surface side of a pair of opposed end portions of the light-receiving surface side glass 6, and the solar battery cell 102 is disposed thereon with a plurality of solar battery strings. Were placed in an electrically connected state.
  • the sealing resin 182 and the non-light-receiving surface side glass 107 were disposed on the solar battery cell 102.
  • Both the sealing resins 181 and 182 used sheet-like EVA.
  • the sheet-like EVA used as the sealing resin 181 may be one sheet or a plurality of sheets. The same applies to the sealing resin 182.
  • These numbers may be determined according to the design value of the distance between the light receiving surface side glass 106 and the non-light receiving surface side glass 107.
  • the distance between the glass on the light-receiving surface side and the non-light-receiving surface side is the same as that of the thin-film silicon solar cell. It is necessary to make it larger in comparison.
  • the protrusion prevention wall arranging step the protrusion prevention wall is arranged at the opposite end of the light receiving surface side glass 106, so that the sealing resin can be arranged at an accurate location.
  • the sheet-like EVA used as the sealing resin had a low adhesiveness with the glass before heating, so that the positional deviation was likely to occur after the placement. The effect that it becomes difficult to occur was also obtained.
  • the light-receiving surface side glass 106 and the non-light-receiving surface side glass 107 can be temporarily fixed via the protrusion prevention wall.
  • the protruding prevention wall having adhesiveness at the opposite end of the solar cell module.
  • spacers 109 are arranged on the outer sides of a pair of opposed end portions where the protrusion prevention walls of the solar cell module are arranged.
  • FIG. 31 (c) is a diagram illustrating the sealing process.
  • the sealing step is performed by a method similar to the method described in the second embodiment. Further, as in the second embodiment, a curing step may be inserted after the sealing step.
  • FIG. 32 shows a diagram for explanation.
  • FIG. 32 is a plan view of the solar cell module as seen from the light receiving surface side.
  • Example 1 A solar cell module manufactured using this embodiment is referred to as Example 1, and samples created for comparison are referred to as Example 2 and Comparative Example 1.
  • the difference between the first embodiment and the second embodiment is that the spacer is not disposed in the second embodiment.
  • the difference between Example 1 and Comparative Example 1 is that Comparative Example 1 was not provided with any protrusion prevention wall or spacer.
  • the distance between the solar cell 221 at one end and the end of the light receiving surface side glass substrate is L1
  • the solar cell at the other end The distance between 222 and the end of the light-receiving surface side glass was L2.
  • the distance between the solar battery cell 223 at the center of the solar battery cell constituting the solar battery string and the end of the light-receiving surface side glass is L3.
  • the lengths of L1, L2, and L3 before the sealing step and the lengths of L1, L2, and L3 after the sealing step are measured. Then, each difference was calculated. The measurement was performed using a caliper.
  • Example 1 the lengths of L1, L2, and L3 were almost the same before and after the sealing process. In other words, in Example 1, the solar cell string was hardly bent. In Example 2, the lengths of L1 and L2 were almost the same, but L3 was slightly longer. In other words, in Example 2, the solar cell string was slightly bent. In Comparative Example 1, the lengths of L1 and L2 hardly changed, but L3 became long. In other words, in Comparative Example 1, the solar cell string was bent more than in Example 2. When Example 1, Example 2 and Comparative Example 1 are compared, only Comparative Example 1 does not have a protrusion prevention wall. Therefore, when there is no protrusion prevention wall, the solar cell string is bent and the position of the solar battery cell is large.
  • Example 1 and Example 2 are compared, it can be seen that the position of the solar cell is slightly changed if there is no spacer even if there is a protrusion prevention wall.
  • the spacer also has an effect of preventing the position of the solar battery cell from changing. This is presumably because the change in the thickness direction of the solar cell module was suppressed by arranging the spacer, and the flow of the sealing resin could be suppressed. That is, in Example 1 shown in this embodiment, it is presumed that the displacement of the solar battery cell could be prevented with higher accuracy by arranging the protrusion prevention wall and the spacer.
  • Example 1 Example 2, and Comparative Example 1, the thickness measurement of the solar cell module was performed using calipers after sealing, and the thickness distribution was calculated. Thickness measurement was performed at a location that entered the central portion of about 10 mm from the end at a total of 8 locations, 4 corners of the solar cell module and 4 central portions of each side.
  • Example 1 there was almost no thickness distribution, but in Example 2 and Comparative Example 1, a distribution occurred. From these results, it can be understood that the distribution of the thickness of the solar cell module can be prevented in the sealing step by arranging the spacer. More specifically, the thickness distribution in Comparative Example 1 was larger than that in Example 2. Arranging the anti-extrusion wall is also considered to have an effect of preventing the thickness distribution.
  • the structure in which two protrusion prevention walls are stacked has been described.
  • the present invention is not limited to two, and includes three or more cases. It is presumed that the decompression time in the sealing process can be shortened by increasing the number of overhanging prevention walls.
  • the number of solar cells constituting the solar cell string and the number of solar cell strings constituting the solar cell module are not limited to the numbers shown in the present embodiment, and may be designed as necessary. .
  • Embodiment 5 Another example of the present invention will be described using the fifth embodiment.
  • the difference of Embodiment 5 from Embodiments 2 and 4 is that a protrusion prevention wall is disposed at any end of the solar cell module.
  • the same components as those in the second and fourth embodiments are denoted by the same member numbers, and detailed description thereof is omitted.
  • FIG. 33 is a plan view of the solar cell module 300 manufactured according to the present embodiment as viewed from the light receiving surface side.
  • the protrusion prevention walls are arranged on all four sides of the peripheral portion. That is, the solar cell module 300 is an example in which both the protrusion preventing wall 103 in the second embodiment and the protrusion preventing wall 203 in the fourth embodiment are arranged.
  • FIG. 34 is a cross-sectional view taken along line EE ′ of the solar cell module shown in FIG.
  • FIG. 35 is a cross-sectional view taken along line FF ′ of the solar cell module shown in FIG.
  • the extraction electrode 141 is extracted from between two protrusion prevention walls.
  • the lead electrode By pulling out from between the protrusion preventing walls, the lead electrode can be pulled out almost parallel to the light receiving surface side and non-light receiving surface side glass without bending at the end.
  • the part not involved in the electrical connection of the extraction electrode with the solar battery cell may be covered with the protective film 144 as in the third embodiment.
  • the protruding prevention walls at all ends of the solar cell module, the positional deviation of the solar cells hardly occurred, and the position accuracy was further improved. Thereby, it can be said that the design property of the solar cell module was further improved.
  • the sealing resin does not protrude from any end of the solar cell module, and it is not necessary to peel off the sealing resin protruding from the end in the manufacturing process, thereby reducing the number of processes. Furthermore, it became possible to prevent the sealing resin protruding from the end of the solar cell module from soiling the laminating apparatus as the sealing apparatus.
  • the non-light-receiving surface side protrusion prevention wall is placed on the light-receiving surface side protrusion prevention wall.
  • the light receiving surface side protrusion preventing wall 131 disposed in the protrusion preventing wall disposing process is disposed.
  • An extraction electrode 141 was disposed on the substrate.
  • the non-light-receiving surface side protrusion prevention wall 132 is arranged so that the extraction electrode 141 is sandwiched between the light-receiving surface side protrusion prevention wall 131 and the non-light-receiving surface side protrusion prevention wall 132. Since the light receiving surface side protrusion preventing wall 131 and the non-light receiving surface side protrusion preventing wall 132 are bonded together by the adhesive layer, there is almost no gap around the lead electrode 141.
  • sealing resin 182 and non-light-receiving surface side glass 107 were disposed.
  • spacers were arranged at either end of the solar cell module in the protrusion prevention wall arranging step and the sealing step. By arranging the spacer at any end of the solar cell module, the uniformity in the thickness direction of the solar cell module was further improved.
  • the spacer As the spacer, a frame-like spacer that can be arranged at one time on any end of the solar cell module was used. In the case where the spacers are separated, the positional deviation between the solar cell module and the spacer is liable to occur when transporting using the conveyor, so it is necessary to use an auxiliary member for transporting.
  • the frame-shaped spacer By using the frame-shaped spacer, the solar cell module can be transported without using an auxiliary member when transporting the solar cell module from the protrusion preventing wall arranging step to the sealing step using a conveyor.
  • the case where the extraction electrode 141 is pulled out from the end of the solar cell module has been described, but a method of pulling out the extraction electrode from another place to the outside of the solar cell module may be used.
  • a method can be used in which a hole is formed in the non-light-receiving surface side glass 107 and the hole is drawn out to the non-light-receiving surface side of the solar cell module.
  • the present invention can be widely applied to solar cell modules and solar cell module manufacturing methods in general.

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Abstract

Selon la présente invention, une barre omnibus d'électrode positive en L (11) et une barre omnibus d'électrode négative (12) sont disposées le long d'un côté vertical (1b) et d'un côté latéral (1c) d'un module de batterie solaire (1). Des bornes de sortie de pôle positif (13a, 13b) et des bornes de sortie de pôle négatif (14a, 14b) sont tirées vers l'extérieur à partir du côté latéral plus long (1c), et un boîtier d'électrode positive (15) et un boîtier d'électrode négative (16), et analogues, sont disposés sur le côté latéral plus long (1c). En outre, toutes les cellules de batterie solaire (3) dans des première et seconde colonnes (R1, L2) sont connectées en série à l'aide d'une seule barre omnibus de connexion (7). Ainsi, bien que le boîtier d'électrode positive (15), le boîtier d'électrode négative (16), et analogues, soient montés sur le côté latéral plus long (1c) du module de batterie solaire (1), le nombre de barres omnibus est faible, et le nombre d'étapes de connexion, telles que par soudage, est également faible.
PCT/JP2013/063035 2012-06-04 2013-05-09 Module de batterie solaire et procédé de fabrication de module de batterie solaire WO2013183395A1 (fr)

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JP2017500751A (ja) * 2013-12-27 2017-01-05 ビーワイディー カンパニー リミテッドＢｙｄ Ｃｏｍｐａｎｙ Ｌｉｍｉｔｅｄ 光電池モジュール
JP2017501584A (ja) * 2013-12-27 2017-01-12 ビーワイディー カンパニー リミテッドＢｙｄ Ｃｏｍｐａｎｙ Ｌｉｍｉｔｅｄ デュアルガラス光電池モジュール
JP2017504296A (ja) * 2013-12-27 2017-02-02 ビーワイディー カンパニー リミテッドＢｙｄ Ｃｏｍｐａｎｙ Ｌｉｍｉｔｅｄ デュアルガラス光電池モジュール
WO2018079811A1 (fr) * 2016-10-31 2018-05-03 京セラ株式会社 Module de cellules solaires
CN108963023A (zh) * 2017-05-27 2018-12-07 常州亚玛顿股份有限公司 一种双玻光伏组件及其制作方法
CN112234120A (zh) * 2020-09-04 2021-01-15 英利能源（中国）有限公司 光伏组件敷设方法

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JP2005101383A (ja) * 2003-09-26 2005-04-14 Sanyo Electric Co Ltd 集積型光起電力装置及びその製造方法
JP2005340756A (ja) * 2004-04-28 2005-12-08 Sharp Corp 太陽電池モジュール用一体型配線部材、それを用いた太陽電池モジュールおよびそれらの製造方法

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JP2005101383A (ja) * 2003-09-26 2005-04-14 Sanyo Electric Co Ltd 集積型光起電力装置及びその製造方法
JP2005340756A (ja) * 2004-04-28 2005-12-08 Sharp Corp 太陽電池モジュール用一体型配線部材、それを用いた太陽電池モジュールおよびそれらの製造方法

Cited By (10)

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Publication number Priority date Publication date Assignee Title
JP2017500751A (ja) * 2013-12-27 2017-01-05 ビーワイディー カンパニー リミテッドＢｙｄ Ｃｏｍｐａｎｙ Ｌｉｍｉｔｅｄ 光電池モジュール
JP2017501584A (ja) * 2013-12-27 2017-01-12 ビーワイディー カンパニー リミテッドＢｙｄ Ｃｏｍｐａｎｙ Ｌｉｍｉｔｅｄ デュアルガラス光電池モジュール
JP2017504296A (ja) * 2013-12-27 2017-02-02 ビーワイディー カンパニー リミテッドＢｙｄ Ｃｏｍｐａｎｙ Ｌｉｍｉｔｅｄ デュアルガラス光電池モジュール
CN103731090A (zh) * 2014-01-13 2014-04-16 于彦坚 光伏发电系统
WO2018079811A1 (fr) * 2016-10-31 2018-05-03 京セラ株式会社 Module de cellules solaires
JPWO2018079811A1 (ja) * 2016-10-31 2019-09-19 京セラ株式会社 太陽電池モジュール
CN108963023A (zh) * 2017-05-27 2018-12-07 常州亚玛顿股份有限公司 一种双玻光伏组件及其制作方法
CN108963023B (zh) * 2017-05-27 2024-05-17 常州亚玛顿股份有限公司 一种双玻光伏组件及其制作方法
CN112234120A (zh) * 2020-09-04 2021-01-15 英利能源（中国）有限公司 光伏组件敷设方法
CN112234120B (zh) * 2020-09-04 2022-07-01 英利能源（中国）有限公司 光伏组件敷设方法

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