WO2012002288A1 - Solar cell string manufacturing device and manufacturing method, adhesive bonding device and adhesive bonding method - Google Patents

Solar cell string manufacturing device and manufacturing method, adhesive bonding device and adhesive bonding method Download PDF

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Publication number
WO2012002288A1
WO2012002288A1 PCT/JP2011/064583 JP2011064583W WO2012002288A1 WO 2012002288 A1 WO2012002288 A1 WO 2012002288A1 JP 2011064583 W JP2011064583 W JP 2011064583W WO 2012002288 A1 WO2012002288 A1 WO 2012002288A1
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WO
WIPO (PCT)
Prior art keywords
resin adhesive
electrode
adhesive
solar cell
electrodes
Prior art date
Application number
PCT/JP2011/064583
Other languages
French (fr)
Japanese (ja)
Inventor
信 渡部
洋 武智
幹一郎 松本
欣治 沖田
翔一 伴
泰信 池田
Original Assignee
株式会社エヌ・ピー・シー
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Application filed by 株式会社エヌ・ピー・シー filed Critical 株式会社エヌ・ピー・シー
Publication of WO2012002288A1 publication Critical patent/WO2012002288A1/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
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • H01L31/1876—Particular processes or apparatus for batch treatment of the devices
    • H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the present invention relates to a solar cell string manufacturing device and manufacturing method for manufacturing a solar cell string in which a plurality of solar cells are connected by a wiring material, an adhesive application device used in the solar cell string manufacturing device and the manufacturing method, and The present invention relates to an adhesive application method.
  • a solar cell module in which a solar cell string in which a plurality of solar cells are connected is sealed with a cover glass is used as a solar cell.
  • the solar cell string is obtained by electrically connecting an electrode formed on a light receiving surface of a solar cell and an electrode formed on the back surface of an adjacent solar cell using a wiring material.
  • a low resistance body such as copper with solder coated around is used as a wiring material.
  • the linear expansion coefficient of the wiring material is larger than the linear expansion coefficient of the semiconductor substrate such as silicon used for the solar battery cell, the wiring material soldered to the solar battery cell shrinks when returning to normal temperature, and the solar battery cell Pressure will be generated inside. As a result, there is a problem that warpage occurs in the solar battery cell.
  • the solar cell string manufacturing apparatus includes an adhesive application device and a wiring material crimping device, and the adhesive material is applied to the electrode of the solar cell with the adhesive application device, and then the wiring material.
  • the wiring material is bonded to the electrode to which the resin adhesive is attached with a crimping device.
  • Patent Document 1 discloses a technique for shortening the time required for crimping by crimping a wiring material to an electrode in the following steps A to D.
  • Step A A wiring member connected to the adjacent solar battery cell is disposed on the electrode on the light receiving surface side of the solar battery cell with a thermosetting resin adhesive interposed therebetween. Moreover, the wiring material connected to the photovoltaic cell adjacent to the other is arrange
  • Process B Next, the resin adhesive is heated at a temperature higher than the softening temperature and lower than the curing temperature, and the wiring material is temporarily bonded to each electrode of the solar battery cell.
  • the process A and the process B are repeated a plurality of times, and the wiring material is temporarily pressure-bonded to the electrodes of all the solar cells.
  • the wiring material is heated at a temperature equal to or higher than the curing temperature of the resin adhesive, and is cured and finally crimped.
  • the present invention has been made in view of the above-mentioned problems, and one of the purposes thereof is an adhesive application device with a small load on a solar battery cell, a solar cell string manufacturing device using the same, and an adhesive. It is providing the agent sticking method and the manufacturing method of a solar cell string using the same.
  • a plurality of solar cells each having an electrode formed on each of the first and second main surfaces facing each other and arranged in a predetermined direction, and the adjacent two of the plurality of solar cells.
  • a wiring member electrically connected to the electrode on the first main surface side of one solar cell and the electrode on the other second main surface side, and between the electrode and the wiring material.
  • a solar cell string manufacturing apparatus including an interposed resin adhesive, and an adhesive pasting device and a wiring material crimping device.
  • the adhesive sticking device sticks the resin adhesive on each of the electrodes.
  • the wiring material crimping apparatus crimps the electrode and the wiring material in a state where the wiring material is disposed on each of the resin adhesives.
  • the adhesive pasting device press-fits the electrode on the first main surface side and the resin adhesive so that the resin adhesive is adhered onto the electrodes on the first and second main surface sides.
  • a pressure-bonding portion for pressure-bonding the electrode on the second main surface side and the resin adhesive is provided.
  • a plurality of solar cells each having an electrode formed on the first and second main surfaces facing each other and arranged in a predetermined direction, and among the plurality of solar cells, adjacent to each other
  • a wiring member electrically connected to the electrode on the first main surface side of one of the two solar cells and the electrode on the second main surface side of the other, and the electrode and the wiring material
  • a resin adhesive interposed therebetween, wherein the first and second resin adhesives are adhered to the electrodes on the first and second main surface sides.
  • Crimping the electrode on the main surface side and the resin adhesive, crimping the electrode on the second main surface side and the resin adhesive, and arranging the wiring material on each of the resin adhesives The step of crimping the electrode and the wiring material in a state
  • the method of the solar cell string, characterized in that it comprises a are provided.
  • an adhesive pasting device for pasting a resin adhesive on the electrodes respectively formed on the opposed first and second main surfaces of the solar battery cell.
  • the electrode on the first main surface side and the resin adhesive are pressure-bonded so that the resin adhesive is bonded onto the electrodes on the first and second main surface sides, and the second main surface side
  • an adhesive pasting device comprising a crimping part for crimping the electrode and the resin adhesive.
  • an adhesive application method for attaching a resin adhesive on the electrodes respectively formed on the opposing first and second main surfaces of the solar battery cell.
  • the electrode on the first main surface side and the resin adhesive are pressure-bonded so that the resin adhesive is bonded onto the electrodes on the first and second main surface sides, and the second main surface side
  • an adhesive application method comprising a step of crimping an electrode and the resin adhesive.
  • the adhesive is simultaneously attached to all the electrodes of the solar battery cell, the load on the solar battery cell when the adhesive is attached to the electrode of the solar battery cell can be reduced.
  • FIG. 3 is a process diagram for attaching a resin adhesive 22 to the electrode 12 of the solar battery cell 10.
  • the top view of the photovoltaic cell 10 hold
  • FIG. 3 is a process diagram for attaching a resin adhesive 22 to the electrode 12 of the solar battery cell 10.
  • the top view of the photovoltaic cell 10 hold
  • FIG. 11 is an enlarged view of the vicinity of the solar battery cell 10 in FIG. 10.
  • FIG. 11 is an enlarged view of the vicinity of the solar battery cell 10 in FIG. 10.
  • FIG. 1 is a plan view of a light receiving surface side of a solar battery cell 10 used in the present embodiment.
  • the solar battery cell 10 is, for example, polycrystalline silicon, and a pn junction is formed by an internal n-type region and a p-type region.
  • the size and thickness are, for example, 125 mm ⁇ 125 mm and 0.2 mm, respectively.
  • a plurality of finger electrodes 11 are formed on the solar battery cell 10, and a plurality of bus bar electrodes 12 are formed orthogonal thereto.
  • finger electrodes 11 and bus bar electrodes 12 as illustrated are formed on the surface (first main surface) that receives sunlight. Further, only the bus bar electrode 12 is formed on the back surface (second main surface).
  • this embodiment shows an example in which three bus bar electrodes 12 are formed, the number is not limited to three, and may be two, or the number of bus bar electrodes 12 corresponding to the size of the solar battery cell 10 may be provided. It may be formed.
  • the finger electrode 11 collects photogenerated carriers generated on the light receiving surface.
  • the bus bar electrode 12 collects the photogenerated carriers collected by the finger electrode 11.
  • FIG. 2 is a side view of the solar cell string 20 manufactured by the manufacturing apparatus of the present embodiment
  • FIG. 3 is a plan view thereof.
  • the solar cell string 20 includes a plurality of solar cells 10 on which the finger electrodes 11 and the bus bar electrodes 12 are formed, a wiring material 21, and a resin adhesive 22.
  • the plurality of solar cells 10 are arranged in a row in a direction parallel to the bus bar electrode 12.
  • One wiring member 21 is about twice as long as the direction in which the bus bar electrode 12 of the solar battery cell 10 is formed, and a step is provided at the center thereof.
  • the solar battery cell 10 is arranged on the upper side on one end side of the wiring member 21 across the step, and the adjacent solar battery cell 10 is arranged on the lower side of the other end side.
  • the wiring member 21 connects these two solar cells 10. More specifically, each wiring member 21 includes one of the bus bar electrodes 12 formed on the surface of the solar battery cell 10 and one of the bus bar electrodes 12 formed on the back surface of the adjacent solar battery cell 10. Are electrically connected.
  • Resin adhesive 22 is inserted between the bus bar electrode 12 and the wiring member 21 to bond them together.
  • the resin adhesive 22 is, for example, a thermosetting epoxy resin containing nickel particles as conductive particles. By pressurizing the resin adhesive 22, the conductive particles are crushed, and the resin adhesive 22 has conductivity.
  • the resin adhesive 22 softens when heated at, for example, 50 ° C. to 90 ° C., and cures when heated at 130 to 180 ° C., which is lower than the melting temperature of the solder.
  • FIG. 2 is a solar cell module in which the solar cell string 20 of FIG. 2 is sealed with a cover glass through a filler such as EVA (ethylene vinyl acetate).
  • EVA ethylene vinyl acetate
  • FIG. 4 is a side view of a solar cell string manufacturing apparatus (hereinafter referred to as manufacturing apparatus) 100.
  • the manufacturing apparatus of FIG. 4 includes an inspection device 30, an adhesive sticking device 40, a wiring material charging device 50, a wiring material crimping device 60, and a solar cell charging device 70.
  • the manufacturing apparatus 100 of the figure manufactures the solar cell string 20 of FIG. 2 using the solar cell 10 of FIG.
  • the inspection device 30 inspects the outer shape, such as whether the solar battery cell 10 is cracked, and adjusts the position so that the solar battery cell insertion device 70 can hold the solar battery cell 10 at the correct position.
  • the adhesive sticking device 40 sticks the resin adhesive 22 on each of the bus bar electrodes 12 formed on the front surface and the back surface of the solar battery cell 10.
  • the wiring material feeding device 50 provides a step in the wiring material 21 and feeds it to the wiring material crimping device 60.
  • the wiring material crimping device 60 pressurizes and heats the resin adhesive 22 to crimp the wiring material 21 to the bus bar electrode 12 of the solar battery cell 10.
  • the solar cell loading device 70 adsorbs the solar cell 10 with air or the like, and the solar cell 10 after the inspection is bonded to the adhesive application device 40 and the solar cell 10 with the adhesive applied is crimped to the wiring material. Each is loaded into the device 60.
  • FIG. 5 is a manufacturing process diagram of the solar cell string 20.
  • the inspection device 30 inspects the solar battery cell 10 (step S1). If no abnormality is found in the inspection, the solar cell loading device 70 takes out the inspected solar cell 10 from the inspection device 30 and inserts it into the adhesive application device 40.
  • the adhesive sticking device 40 sticks the resin adhesive 22 to the bus bar electrode 12 of the solar battery cell 10 (step S2). Although details of the adhesive sticking device 40 will be described later, the adhesive sticking device 40 simultaneously sticks the resin adhesive 22 to each of the bus bar electrodes 12 formed on the front surface and the back surface of the solar cell, The load on the solar battery cell 10 due to heat and pressure can be reduced, and the application can be performed in a short time.
  • the wiring material input device 50 inputs the three wiring materials 21 provided with steps to the wiring material crimping device 60 (step S3).
  • one end of each wiring member 21 is arranged on each bus bar electrode 12 on the surface side of the solar battery cell 10 that has been put into the wiring member crimping device 60 before the step.
  • the solar cell loading device 70 throws the solar cell 10 to which the resin adhesive 22 is attached onto the other end of the wiring member 21 put into the wiring member crimping device 60 (step S4).
  • the solar cells 10 are put in such a manner that the bus bar electrodes 12 on the back surface side of the solar cells 10 are arranged on each wiring member 21.
  • the wiring material crimping device 60 pressurizes and heats the resin adhesive 22 to crimp the wiring material 21 and the bus bar electrode 12 of the solar battery cell 10 (step S5). Although details of the wiring material crimping device 60 will be described later, as will be described later, the wiring material crimping device 60 can improve throughput by performing heating in a plurality of steps. Moreover, since crimping
  • FIG. 6 is a front view of the adhesive application device 40
  • FIG. 7 is a side view of FIG. 6 viewed from the left side of the drawing.
  • the adhesive sticking device 40 includes an upper face sticking part 41a and a lower face sticking part 41b.
  • the upper surface sticking portion 41a sticks the resin adhesive 22 to the bus bar electrode 12 (hereinafter simply referred to as the electrode 12) on the surface side of the solar battery cell 10, and the lower surface sticking portion 41b attaches the resin adhesive 22 to the electrode 12 on the back surface side. paste.
  • the upper surface sticking portion 41a includes three supply reels 42a, a half cut portion 43a, a pressure bonding member 44a, a peeling roller 45a, three recovery reels 46a, and conveying rollers 471a to 474a.
  • the three supply reels 42 a are provided in accordance with the distance between the electrodes 12 of the solar battery cell 10.
  • Each supply reel 42a is set with a belt-shaped resin adhesive 22 (hereinafter referred to as a resin adhesive 24 with release paper) wound with the release paper 23 attached thereto.
  • a resin adhesive 24 with release paper wound with the release paper 23 attached thereto.
  • the transport roller (first transport roller) 471a rotates, the resin adhesive 24 with release paper is pulled out from the supply reel 42a and supplied to the half-cut portion 43a.
  • the resin adhesive 24 with release paper is provided with the resin adhesive 22 on the outer side of the upper surface sticking portion 41a and the release paper 23 on the inner side.
  • the half-cut portion 43 a cuts only the resin adhesive 22 of the resin adhesive 24 with release paper according to the length of the electrode 12.
  • the pressure-bonding member 44 a presses and heats the resin adhesive 24 with release paper on the electrode 12 on the surface side of the solar battery cell 10 to pressure-bond the resin adhesive 22 and the electrode 12.
  • the stripping roller 45a strips the release paper 23 from the resin adhesive 24 with release paper.
  • the collection reel 46a collects the peeled release paper 23 as the transport rollers 473a and 474a rotate.
  • FIG. 7 shows an example in which the three resin adhesives 24 with release paper are conveyed by the three conveyance rollers 471a, but the three resin adhesives 24 with release paper may be conveyed by one conveyance roller. . Moreover, in the same figure, the three resin adhesives 24 with release paper are cut by one half-cut part 43a, but three half-cut parts are provided, and each one resin adhesive 22 is cut. Also good.
  • the configuration of the lower surface pasting portion 41b is substantially the same as the configuration of the upper surface pasting portion 41a.
  • the shape of the crimping member 44b is different from that of the crimping member 44a. The reason is that the solar cell loading device 70 grips the upper surface side of the solar cell 10, and the crimping member 44 a is formed by forming irregularities on the crimping member 44 a of the upper surface sticking portion 41 a, so that the solar cell loading device is The resin adhesive 22 and the electrode 12 can be pressure-bonded while avoiding 70.
  • the crimping member (first crimping member) 44a and the crimping member (second crimping member) 44b constitute a crimping part. Further, the transport rollers 473a, 473b, 474a, 474b and the collection reels 46a, 46b constitute a collection unit.
  • FIG. 8 is a process diagram for attaching the resin adhesive 22 to the electrode 12 of the solar battery cell 10, and shows step S2 of FIG. 5 in detail.
  • the resin adhesive 24 with release paper is set in advance on the supply reels 42a and 42b (step S11).
  • the solar battery cell 10 is put into the adhesive sticking device 40 by the solar battery feeding device 70 (step S12). More specifically, the solar cell loading device 70 holds the solar battery cell 10 between the upper surface pasting portion 41a and the lower surface pasting portion 41b.
  • FIG. 9 is a top view of the solar cell 10 held by the solar cell loading device 70. As shown in the figure, the tip of the solar cell loading device 70 has a fork-shaped gripping member, the electrode 12 of the solar cell 10 is disposed in the gap, and the solar cell 10 is gripped by air or the like.
  • the transport rollers 471a to 474a and 471b to 474b are rotated so that the resin adhesive 24 with release paper is supplied to the positions facing the electrodes 12 of the solar battery cell 10 (step S13), and later charged.
  • the half-cut portions 43a and 43b cut only the resin adhesive 22 of the resin adhesive 24 with release paper according to the length of the electrode 12 (step S14). That is, the resin adhesive 22 cut according to the length of the electrode 12 is supplied to the electrode 12 of the solar battery cell 10.
  • the resin adhesive 24 with release paper is placed so as to face all the three electrodes 12 on the surface side of the solar battery cell 10. Supplied. The same applies to the back side of the solar battery cell 10.
  • FIG. 10 is a front view of the adhesive application device 40 when the resin adhesive 22 is adhered to the electrode 12 of the solar battery cell 10
  • FIG. 11 is an enlarged view of the vicinity of the solar battery cell 10 of FIG. 12 is a side view of FIG. 10 viewed from the left side of the drawing
  • FIG. 13 is an enlarged view of the vicinity of the solar battery cell 10 of FIG.
  • the solar cell loading device 70 is omitted.
  • the crimping member 44a of the upper surface pasting portion 41a is lowered by the air cylinder or the like, and the crimping member 44b of the lower surface pasting portion 41b is raised.
  • the resin adhesive 24 with release paper comes into contact with each electrode 12 of the solar battery cell 10.
  • step S ⁇ b> 14 the resin adhesive 22 is cut in accordance with the length of the electrode 12.
  • the surface of the crimping member 44b of the lower surface pasting portion 41b is flat, while the surface of the crimping member 44a of the upper surface pasting portion 41a is uneven.
  • the solar cell loading device 70 grips the upper surface side of the solar cell 10. That is, the crimping member 44 a avoids the gripping member at the tip of the solar cell loading device 70 at the concave portion, and causes the resin adhesive 24 with release paper to contact the electrode 12 of the solar cell 10 at the convex portion.
  • the pressure-bonding members 44a and 44b have a curing temperature higher than the softening temperature of the resin adhesive 22 while sandwiching and pressing the resin adhesive 24 with the upper and lower release paper and the electrode 12 of the solar battery cell 10 for about 4.5 seconds. Heat at a lower temperature, for example 50 ° C. to 90 ° C. Thereby, the resin adhesive 22 is softened and adhered to the electrode 12 of the solar battery cell 10. Thereafter, the pressure-bonding member 44a of the upper surface pasting portion 41a is raised, and the pressure bonding member 44b of the lower surface pasting portion 41b is lowered.
  • the step S15 in FIG. An agent can be attached. Therefore, the load on the solar battery cell 10 due to heat and pressure can be reduced, and the application can be performed in a short time.
  • FIG. 14 is a front view of the adhesive application device 40 when the release paper 23 is peeled off.
  • the peeling rollers 45a and 45b are moved above and below the solar battery cell 10 by an air cylinder or the like, and the release paper 23 is pulled from both sides by a chuck (not shown) to pull the solar battery.
  • the release paper 23 is peeled off from the resin adhesive 22 attached to the electrode 12.
  • the stripping rollers 45a and 45b return to the original positions shown in FIG.
  • the peeled release paper 23 is wound around the collection reels 46a and 46b by the rotation of the transport rollers 473a, 474a, 473b, and 474b.
  • the solar cell 10 is taken out from the sticking device by the solar cell loading device 70 (step S17).
  • the resin adhesive 22 can be attached to the electrode 12 of the solar battery cell 10.
  • the same number of the resin adhesives 24 with release paper as the electrodes 12 of the solar battery cell 10 are used and sandwiched from the front surface side and the back surface side of the solar battery cell 10 to be added. Pressure and heat. Therefore, the resin adhesive 22 can be applied to all the electrodes 12 at the same time, so that the load on the solar battery cell 10 is reduced and the application time of the resin adhesive 22 can be shortened.
  • the wiring material crimping apparatus 60 of FIG. 4 is used in common for the input unit 71, the temporary crimping unit 72, the main crimping unit 73, the first heating unit 74, and the second heating unit 75.
  • a transporting device 61 and a heating device 62 are provided. Each unit from the input unit 71 to the second heating unit 75 occupies a space of about one solar cell 10 on the transport device 61.
  • the transport device 61 transports the solar battery cells 10 to the next stage in the order from the charging unit 71 to the second heating unit 75 each time the processing in each stage is completed.
  • the heating device 62 heats the solar battery cell 10.
  • the heating device 62 can heat the solar battery cells 10 at different temperatures from the charging unit 71 to the second heating unit 75.
  • the solar cell 10 in which the wiring member 21 and the resin adhesive 22 are attached to the electrode 12 is input to the input unit 71.
  • the temporary pressure bonding part 72 has a pressing member 63, and temporarily press-bonds the wiring member 21 and the solar battery cell 10 by pressurization by the pressing member 63 and heating by the heating device 62.
  • the main crimping portion 73 has a pressure member 64 whose bottom surface is horizontal, and applies pressure to the resin adhesive 22 to crush conductive particles such as nickel contained in the resin adhesive 22 to obtain conductivity. Further, a heating device 64 a is provided on the lower surface of the pressure member 64, and the resin adhesive 22 is heated together with the heating device 62.
  • the first heating unit 74 and the second heating unit 75 share the non-contact heating device 65 and heat and cure the resin adhesive 22.
  • the non-contact heating device 65 is, for example, an IR (infrared) lamp, IH (induction heating), hot air, or the like.
  • FIG. 15 is a process diagram for crimping the wiring member 21 to the solar battery cell 10, and shows step S5 of FIG. 5 in detail.
  • the solar cell input device 70 inputs the solar cell 10 to which the resin adhesive is attached, and the wiring material input device 50 inputs the wiring material 21 into the input portion of the wiring material crimping device 60 (step S21).
  • the solar cell loading device 70 throws the solar battery cell 10 onto the wiring material 21 that has already been thrown in, and the wiring material throwing device 50 places the wiring material 21 with a step into the solar cell. 10 on top.
  • the resin adhesive 22 may be preheated using the heating device 62 for the next step.
  • the time required for the step S21 is, for example, 6 seconds.
  • the transport device 61 transports them to the temporary pressure bonding part 72 and the next solar battery cell 10 and the wiring material 21 are introduced. That is, the solar cells 10 are sequentially inserted into the input unit 71 at a rate of one sheet every 6 seconds.
  • the wiring member 21 and the solar battery cell are pressed by the pressing member 63 while being heated by the heating device 62 at a temperature higher than the softening temperature of the resin adhesive 22 and lower than the curing temperature, for example, 50 to 90 ° C. 10 is pressurized, the resin adhesive 22 is softened, and the wiring member 21 and the solar battery cell 10 are temporarily pressure-bonded (step S22). Since the electrodes 12 are formed at the same position on the front surface and the back surface of the solar battery cell 10, the wiring members 21 on both the front surface and the back surface of the solar battery cell 10 are temporarily pressed. Thereby, it can prevent that the wiring material 21 slip
  • the time required for the process of step S22 is, for example, 3 seconds. Since the charging process (step S21) of the previous solar battery cell 10 requires 6 seconds, the next solar battery cell 10 is transferred from the charging part 71 to the temporary pressure bonding part 72 as soon as this process is completed in 3 seconds. I don't mean. Therefore, after the temporary press-bonding is completed in 3 seconds and waits for another 3 seconds and stays in the temporary press-bonding portion for a total of 6 seconds, the transport device 61 transports the solar cell 10 from the temporary press-bonding portion 72 to the main press-bonding portion 73. At the same time, the next solar battery cell 10 is transported from the charging unit 71 to the temporary pressure bonding unit 72.
  • the pressure bonding member 64 presses the resin adhesive 22 at about 2 to 3 MPa and performs the final press bonding. Thereby, the electroconductive particle contained in the resin adhesive 22 is crushed, and electroconductivity is obtained. Note that the lower surface of the pressure member 64 is flat. Since the wiring member 21 is placed on the solar battery cell 10, the pressurizing member 64 does not come into contact with the solar battery cell 10 when pressurizing with the pressurizing member 64.
  • a heating device 64a is provided below the pressurizing member 64, and not only pressurization but also heating for curing the resin adhesive 22 can be performed.
  • the time required for the main pressure bonding is, for example, 3 seconds, and the time required for curing the resin adhesive 22 is, for example, 15 seconds. Therefore, if heating is performed using the pressure member 64 and the heating device 64a until the resin adhesive 22 is completely cured simultaneously with the main pressing, it is necessary to heat for 15 seconds. In this case, this process becomes a bottleneck, and the overall throughput decreases.
  • One solar cell 10 per second (four per minute) is obtained.
  • step S21 and S22 and main press bonding paying attention to the fact that the longest time of the processes so far (steps S21 and S22 and main press bonding) is 6 seconds of step S21, the resin adhesive 22 is not completely cured in step S23. However, heating for curing is performed in a plurality of steps.
  • step S23 in parallel with the press bonding of the resin adhesive 23 and the main pressure bonding, the heating device 62 and the heating device 64a are used at a temperature higher than the curing temperature of the resin adhesive 22, for example, 130 ° C. to 180 ° C.
  • the resin adhesive 22 is heated (step S23). In this step, heating is performed for 3 seconds out of 15 seconds necessary for curing the resin adhesive 22.
  • the sheet is transported to the first heating section 74 and heated by the first and second heating sections 75 in the remaining 12 seconds in two portions. That is, in the 1st heating part 74, it heats for 6 second at the said temperature with the heating apparatus 62 and the non-contact heating apparatus 65 (step S24). Furthermore, it conveys to the 2nd heating part 75, and similarly heats for 6 second (step S25).
  • the 1st and 2nd heating parts 74 and 75 share the non-contact heating apparatus 65, and can heat the two photovoltaic cells 10 simultaneously.
  • the second heating unit 75 is heated for a total of 15 seconds together with the heating time in the main crimping unit 73 and the first heating unit 74. Thereby, the time required for the resin adhesive 33 to cure is reached, the resin adhesive 33 is cured, and the wiring member 21 and the electrode 12 of the solar battery cell 10 are bonded.
  • the wiring material crimping device 60 of FIG. 4 does not harden the resin adhesive 22 after all the solar cells 10 are temporarily crimped, it is performed for each solar cell 10.
  • the size may be about five of the solar cells 10 corresponding to the input unit 71 to the second heating unit 75 regardless of the number of solar cells 10 to be connected.
  • the heating process for curing the resin adhesive 22 that requires the longest time is performed in a plurality of steps. Therefore, the solar cell string 20 can be generated with high throughput. Moreover, since hardening is performed for each solar battery cell 10, the wiring material crimping device 60 can be reduced in size.
  • the time of each step in FIG. 15 described above is an example, and the curing of the resin adhesive 22 may be divided into a plurality of processes according to the actual time. For example, if the process of step S21 is 3 seconds, after heating for 3 seconds in step S23, the remaining 12 seconds are divided into 4 processes (that is, three first heating parts 74 are provided), thereby reducing the throughput. One in 3 seconds. For example, when the required time in the process of step S22 is longer than the process of step S21, the heating time in each heating unit may be set to be shorter than the required time of the process in step S22.

Abstract

Disclosed are an adhesive bonding device that places a small load on a solar cell and a solar cell string manufacturing device employing same, and an adhesive bonding method and a solar cell string manufacturing method employing same. An adhesive bonding device (40) comprises an upper face bonding unit (41a) and a lower face bonding unit (41b). The upper face bonding unit (41a) further comprises three supply reels (42a), a half-cut unit (43a), a crimping member (44a), a stripping roller (45a), three recovery reels (46a), and conveyor rollers (471a - 474a). Exactly the same number of resin adhesives (24) with detachable sheets as the number of electrodes (12) of a solar cell (10) is employed to sandwich, pressurize and heat the obverse and reverse sides of the solar cell (10). It is thus possible to simultaneously bond the resin adhesives (22) to all of the electrodes (12), reducing the load on the solar cell (10) and facilitating reduced bonding time for the resin adhesives (22).

Description

太陽電池ストリングの製造装置および製造方法、接着剤貼付装置および接着剤貼付方法Solar cell string manufacturing apparatus and manufacturing method, adhesive application device, and adhesive application method
　本発明は、複数の太陽電池セルを配線材で接続した太陽電池ストリングを製造する太陽電池ストリングの製造装置および製造方法、この太陽電池ストリングの製造装置および製造方法でそれぞれ用いられる接着剤貼付装置および接着剤貼付方法に関する。 The present invention relates to a solar cell string manufacturing device and manufacturing method for manufacturing a solar cell string in which a plurality of solar cells are connected by a wiring material, an adhesive application device used in the solar cell string manufacturing device and the manufacturing method, and The present invention relates to an adhesive application method.
　太陽電池セル１枚当たりの出力は数Ｗ程度であるので、複数の太陽電池セルを接続した太陽電池ストリングをカバーガラスで封止した太陽電池モジュールが太陽電池として用いられる。太陽電池ストリングは、太陽電池セルの受光面に形成される電極と、隣接する太陽電池セルの裏面に形成される電極とを配線材を用いて電気的に接続したものである。 Since the output per solar cell is about several W, a solar cell module in which a solar cell string in which a plurality of solar cells are connected is sealed with a cover glass is used as a solar cell. The solar cell string is obtained by electrically connecting an electrode formed on a light receiving surface of a solar cell and an electrode formed on the back surface of an adjacent solar cell using a wiring material.
　従来は、周囲にハンダがコーティングされた銅等の低抵抗体を配線材として用いていた。しかしながら、配線材の線膨張係数は太陽電池セルに用いられるシリコン等の半導体基板の線膨張係数より大きいため、太陽電池セルにハンダ付けされた配線材は常温に戻る際に収縮し、太陽電池セルの内部に圧力が生じてしまう。その結果、太陽電池セルに反りが発生するという問題がある。 Conventionally, a low resistance body such as copper with solder coated around is used as a wiring material. However, since the linear expansion coefficient of the wiring material is larger than the linear expansion coefficient of the semiconductor substrate such as silicon used for the solar battery cell, the wiring material soldered to the solar battery cell shrinks when returning to normal temperature, and the solar battery cell Pressure will be generated inside. As a result, there is a problem that warpage occurs in the solar battery cell.
　そのため、近年では、ハンダの融解温度よりも低い温度（例えば１３０℃～１８０℃）で硬化する樹脂接着剤を用いて配線材を太陽電池セルに接着することにより、この問題を回避している。より具体的には、太陽電池ストリングの製造装置は接着剤貼付装置および配線材圧着装置を備えており、接着剤貼付装置にて太陽電池セルの電極に樹脂接着剤を貼り付け、その後、配線材圧着装置にて、樹脂接着剤が貼り付けられた電極に配線材を接着する。 Therefore, in recent years, this problem is avoided by adhering the wiring material to the solar battery cell using a resin adhesive that is cured at a temperature lower than the melting temperature of the solder (for example, 130 ° C. to 180 ° C.). More specifically, the solar cell string manufacturing apparatus includes an adhesive application device and a wiring material crimping device, and the adhesive material is applied to the electrode of the solar cell with the adhesive application device, and then the wiring material. The wiring material is bonded to the electrode to which the resin adhesive is attached with a crimping device.
　接着剤貼付装置には以下のような問題がある。太陽電池セルには、受光面および裏面に電極が形成されるため、その両面に樹脂接着剤を貼り付ける必要がある。一般的な接着剤貼付装置では、まず一方の面の電極に樹脂接着剤を貼り付け、その後に、他方の電極に樹脂接着剤を貼り付ける。 接着 There are the following problems with the adhesive application device. Since an electrode is formed on the light receiving surface and the back surface of the solar battery cell, it is necessary to affix a resin adhesive on both surfaces. In a general adhesive application device, a resin adhesive is first applied to an electrode on one surface, and then a resin adhesive is applied to the other electrode.
　しかしながら、複数回にわたって貼付を行うと、貼付時の熱や圧力により太陽電池セルに負荷がかかり、太陽電池セルが破損してしまうおそれがある。また、貼付に必要な時間が長くなり、太陽電池ストリング製造のスループットが低下するという問題もある。 However, if pasting is performed a plurality of times, there is a risk that the solar battery cell may be damaged due to a load applied to the solar battery cell due to heat and pressure at the time of pasting. In addition, there is a problem that the time required for sticking becomes longer and the throughput of manufacturing the solar cell string is lowered.
　また、配線材圧着装置には以下のような問題がある。樹脂接着剤を硬化させて、配線材と太陽電池セルの電極とを圧着するためには、ハンダ付けよりも長い時間（例えば１５秒間）加熱しなければならない。そのため、特許文献１には、以下の工程Ａ～工程Ｄにより電極に配線材を圧着することにより、圧着に要する時間を短縮する手法が開示されている。 Also, the wiring material crimping device has the following problems. In order to cure the resin adhesive and crimp the wiring material and the electrode of the solar battery cell, it must be heated for a longer time (for example, 15 seconds) than the soldering. For this reason, Patent Document 1 discloses a technique for shortening the time required for crimping by crimping a wiring material to an electrode in the following steps A to D.
　（工程Ａ）．熱硬化性の樹脂接着剤を挟んで、太陽電池セルの受光面側の電極上に、隣接する太陽電池セルに接続される配線材を配置する。また、同樹脂接着剤を挟んで、太陽電池セルの裏面側の電極上に、他方に隣接する太陽電池セルに接続される配線材を配置する。
　（工程Ｂ）．次に、樹脂接着剤を、軟化温度より高く、硬化温度より低い温度で加熱し、配線材を太陽電池セルの各電極に仮圧着する。
　（工程Ｃ）．上記の工程Ａおよび工程Ｂを複数回繰り返して、全ての太陽電池セルの電極に配線材を仮圧着する。
　（工程Ｄ）．配線材を樹脂接着剤に押し付けながら樹脂接着剤の硬化温度以上の温度で加熱し、硬化させて本圧着する。 (Step A). A wiring member connected to the adjacent solar battery cell is disposed on the electrode on the light receiving surface side of the solar battery cell with a thermosetting resin adhesive interposed therebetween. Moreover, the wiring material connected to the photovoltaic cell adjacent to the other is arrange | positioned on the electrode of the back surface side of a photovoltaic cell on both sides of the resin adhesive.
(Process B). Next, the resin adhesive is heated at a temperature higher than the softening temperature and lower than the curing temperature, and the wiring material is temporarily bonded to each electrode of the solar battery cell.
(Process C). The process A and the process B are repeated a plurality of times, and the wiring material is temporarily pressure-bonded to the electrodes of all the solar cells.
(Process D). While pressing the wiring material against the resin adhesive, the wiring material is heated at a temperature equal to or higher than the curing temperature of the resin adhesive, and is cured and finally crimped.
　この手法によると、仮圧着した後に、全ての太陽電池セルに貼り付けられた樹脂接着剤を同時に硬化させて本圧着するため、１つの太陽電池セルごとに樹脂接着剤を硬化させるよりも短時間で太陽電池ストリングを製造できる。 According to this method, since the resin adhesive attached to all the solar cells is cured at the same time after the temporary pressure bonding, and the main pressure bonding is performed, it takes a shorter time than curing the resin adhesive for each solar cell. Can produce solar cell strings.
　しかしながら、特許文献１の手法において、工程Ｃでは仮圧着された全ての太陽電池を置く載置台が必要であり、工程Ｄでも、全ての太陽電池セルを同時に本圧着するための装置が必要である。その結果、配線材圧着装置が大型化し、高価になってしまうという問題がある。 However, in the method of Patent Document 1, a mounting table on which all the temporarily-bonded solar cells are placed is required in the process C, and an apparatus for simultaneously press-bonding all the solar battery cells is also required in the process D. . As a result, there is a problem that the wiring material crimping apparatus becomes large and expensive.
国際公開第２００９／０１１２０９号International Publication No. 2009/011209
　本発明は、上記の問題点に鑑みてなされたものであり、その目的の１つは、太陽電池セルへの負荷が小さい接着剤貼付装置およびこれを用いた太陽電池ストリングの製造装置と、接着剤貼付方法およびこれを用いた太陽電池ストリングの製造方法とを提供することである。 The present invention has been made in view of the above-mentioned problems, and one of the purposes thereof is an adhesive application device with a small load on a solar battery cell, a solar cell string manufacturing device using the same, and an adhesive. It is providing the agent sticking method and the manufacturing method of a solar cell string using the same.
　本発明の一態様によれば、対向する第１および第２主面にそれぞれ電極が形成され所定方向に列設された複数の太陽電池セルと、前記複数の太陽電池セルのうち、隣接する２つの太陽電池セルの一方の前記第１主面側の前記電極と他方の前記第２主面側の前記電極とに電気的に接続される配線材と、前記電極と前記配線材との間に介挿される樹脂接着剤と、を備える太陽電池ストリングの製造装置であって、接着剤貼付装置と、配線材圧着装置と、を備える太陽電池ストリングの製造装置が提供される。接着剤貼付装置は、前記電極のそれぞれの上に前記樹脂接着剤を貼り付ける。配線材圧着装置は、前記樹脂接着剤のそれぞれの上に前記配線材を配置した状態で、前記電極と前記配線材とを圧着する。また、前記接着剤貼付装置は、前記第１および第２主面側の前記電極上に前記樹脂接着剤が接着されるように、前記第１主面側の前記電極および前記樹脂接着剤を圧着するとともに、前記第２主面側の前記電極および前記樹脂接着剤を圧着する圧着部を有する。 According to one aspect of the present invention, a plurality of solar cells each having an electrode formed on each of the first and second main surfaces facing each other and arranged in a predetermined direction, and the adjacent two of the plurality of solar cells. A wiring member electrically connected to the electrode on the first main surface side of one solar cell and the electrode on the other second main surface side, and between the electrode and the wiring material There is provided a solar cell string manufacturing apparatus including an interposed resin adhesive, and an adhesive pasting device and a wiring material crimping device. The adhesive sticking device sticks the resin adhesive on each of the electrodes. The wiring material crimping apparatus crimps the electrode and the wiring material in a state where the wiring material is disposed on each of the resin adhesives. Further, the adhesive pasting device press-fits the electrode on the first main surface side and the resin adhesive so that the resin adhesive is adhered onto the electrodes on the first and second main surface sides. In addition, a pressure-bonding portion for pressure-bonding the electrode on the second main surface side and the resin adhesive is provided.
　また、本発明の一態様によれば、対向する第１および第２主面にそれぞれ電極が形成され所定方向に列設された複数の太陽電池セルと、前記複数の太陽電池セルのうち、隣接する２つの太陽電池セルの一方の前記第１主面側の前記電極と他方の前記第２主面側の前記電極とに電気的に接続される配線材と、前記電極と前記配線材との間に介挿される樹脂接着剤と、を備える太陽電池ストリングの製造方法であって、前記第１および第２主面側の前記電極上に前記樹脂接着剤が接着されるように、前記第１主面側の前記電極および前記樹脂接着剤を圧着するとともに、前記第２主面側の前記電極および前記樹脂接着剤を圧着する工程と、前記樹脂接着剤のそれぞれの上に前記配線材を配置した状態で、前記電極と前記配線材とを圧着する工程と、を備えることを特徴とする太陽電池ストリングの製造方法が提供される。 In addition, according to one aspect of the present invention, a plurality of solar cells each having an electrode formed on the first and second main surfaces facing each other and arranged in a predetermined direction, and among the plurality of solar cells, adjacent to each other A wiring member electrically connected to the electrode on the first main surface side of one of the two solar cells and the electrode on the second main surface side of the other, and the electrode and the wiring material And a resin adhesive interposed therebetween, wherein the first and second resin adhesives are adhered to the electrodes on the first and second main surface sides. Crimping the electrode on the main surface side and the resin adhesive, crimping the electrode on the second main surface side and the resin adhesive, and arranging the wiring material on each of the resin adhesives The step of crimping the electrode and the wiring material in a state The method of the solar cell string, characterized in that it comprises a are provided.
　また、本発明の一態様によれば、太陽電池セルの、対向する第１および第２主面にそれぞれ形成された電極の上に樹脂接着剤を貼り付ける接着剤貼付装置であって、前記第１および第２主面側の前記電極上に前記樹脂接着剤が接着されるように、前記第１主面側の前記電極および前記樹脂接着剤を圧着するとともに、前記第２主面側の前記電極および前記樹脂接着剤を圧着する圧着部を備えることを特徴とする接着剤貼付装置が提供される。 Moreover, according to one aspect of the present invention, there is provided an adhesive pasting device for pasting a resin adhesive on the electrodes respectively formed on the opposed first and second main surfaces of the solar battery cell. The electrode on the first main surface side and the resin adhesive are pressure-bonded so that the resin adhesive is bonded onto the electrodes on the first and second main surface sides, and the second main surface side Provided is an adhesive pasting device comprising a crimping part for crimping the electrode and the resin adhesive.
　また、本発明の一態様によれば、太陽電池セルの、対向する第１および第２主面にそれぞれ形成された電極の上に樹脂接着剤を貼り付ける接着剤貼付方法であって、前記第１および第２主面側の前記電極上に前記樹脂接着剤が接着されるように、前記第１主面側の前記電極および前記樹脂接着剤を圧着するとともに、前記第２主面側の前記電極および前記樹脂接着剤を圧着する工程を備えることを特徴とする接着剤貼付方法が提供される。 Moreover, according to one aspect of the present invention, there is provided an adhesive application method for attaching a resin adhesive on the electrodes respectively formed on the opposing first and second main surfaces of the solar battery cell. The electrode on the first main surface side and the resin adhesive are pressure-bonded so that the resin adhesive is bonded onto the electrodes on the first and second main surface sides, and the second main surface side There is provided an adhesive application method comprising a step of crimping an electrode and the resin adhesive.
　本発明によれば、太陽電池セルの全ての電極に同時に接着剤を貼り付けるため、接着剤を太陽電池セルの電極に貼り付ける際の太陽電池セルへの負荷を軽減できる。 According to the present invention, since the adhesive is simultaneously attached to all the electrodes of the solar battery cell, the load on the solar battery cell when the adhesive is attached to the electrode of the solar battery cell can be reduced.
本実施形態で用いる太陽電池セル１０の受光面側の平面図。The top view by the side of the light-receiving surface of the photovoltaic cell 10 used by this embodiment. 本実施形態の製造装置により製造される太陽電池ストリング２０の側面図。The side view of the solar cell string 20 manufactured with the manufacturing apparatus of this embodiment. 本実施形態の製造装置により製造される太陽電池ストリング２０の平面図。The top view of the solar cell string 20 manufactured with the manufacturing apparatus of this embodiment. 太陽電池ストリングの製造装置の１００の側面図。The side view of 100 of the manufacturing apparatus of a solar cell string. 太陽電池ストリング２０の製造工程図。The manufacturing process figure of the solar cell string 20. FIG. 接着剤貼付装置４０の正面図。The front view of the adhesive agent sticking apparatus 40. FIG. 図６を紙面左側から見た側面図。The side view which looked at FIG. 6 from the paper surface left side. 太陽電池セル１０の電極１２に樹脂接着剤２２を貼り付けるための工程図。FIG. 3 is a process diagram for attaching a resin adhesive 22 to the electrode 12 of the solar battery cell 10. 太陽電池セル投入装置７０により把持される太陽電池セル１０の上面図。The top view of the photovoltaic cell 10 hold | gripped by the photovoltaic cell injection | throwing-in apparatus 70. FIG. 太陽電池セル１０の電極１２に樹脂接着剤２２を接着させる時の接着剤貼付装置４０の正面図。The front view of the adhesive agent sticking apparatus 40 when adhere | attaching the resin adhesive 22 on the electrode 12 of the photovoltaic cell 10. FIG. 図１０の太陽電池セル１０付近の拡大図。FIG. 11 is an enlarged view of the vicinity of the solar battery cell 10 in FIG. 10. 図１０を紙面左側から見た側面図。The side view which looked at FIG. 10 from the paper surface left side. 図１０の太陽電池セル１０付近の拡大図。FIG. 11 is an enlarged view of the vicinity of the solar battery cell 10 in FIG. 10. 剥離紙２３を剥ぎ取る時の接着剤貼付装置４０の正面図。The front view of the adhesive agent sticking apparatus 40 when peeling off the release paper 23. FIG. 太陽電池セル１０に配線材２１を圧着するための工程図。Process drawing for crimping | bonding the wiring material 21 to the photovoltaic cell 10. FIG.
　以下、本発明に係る太陽電池ストリングの製造装置および製造方法、接着剤貼付装置および接着剤貼付方法、配線材圧着装置および配線材圧着方法の実施形態について、図面を参照しながら具体的に説明する。 Hereinafter, embodiments of a solar cell string manufacturing apparatus and manufacturing method, an adhesive application apparatus and an adhesive application method, a wiring material crimping apparatus, and a wiring material crimping method according to the present invention will be specifically described with reference to the drawings. .
　まず、本実施形態で用いられる太陽電池セル１０および本実施形態で製造される太陽電池ストリング２０について説明する。 First, the solar battery cell 10 used in the present embodiment and the solar battery string 20 manufactured in the present embodiment will be described.
　図１は、本実施形態で用いる太陽電池セル１０の受光面側の平面図である。太陽電池セル１０は例えば多結晶シリコンであり、内部のｎ型領域およびｐ型領域によりｐｎ接合が形成されている。その大きさおよび厚さはそれぞれ、例えば１２５ｍｍ×１２５ｍｍおよび０．２ｍｍである。太陽電池セル１０上には複数のフィンガー電極１１が形成され、これらと直交して複数のバスバー電極１２が形成されている。 FIG. 1 is a plan view of a light receiving surface side of a solar battery cell 10 used in the present embodiment. The solar battery cell 10 is, for example, polycrystalline silicon, and a pn junction is formed by an internal n-type region and a p-type region. The size and thickness are, for example, 125 mm × 125 mm and 0.2 mm, respectively. A plurality of finger electrodes 11 are formed on the solar battery cell 10, and a plurality of bus bar electrodes 12 are formed orthogonal thereto.
　太陽電池セル１０は、太陽光を受光する表面（第１主面）に図示のようなフィンガー電極１１およびバスバー電極１２が形成される。また、裏面（第２主面）には、バスバー電極１２のみ形成される。本実施形態では３本のバスバー電極１２が形成される例を示すが、３本に限らず、２本であってもよいし、太陽電池セル１０の大きさに応じた数のバスバー電極１２を形成してもよい。 In the solar battery cell 10, finger electrodes 11 and bus bar electrodes 12 as illustrated are formed on the surface (first main surface) that receives sunlight. Further, only the bus bar electrode 12 is formed on the back surface (second main surface). Although this embodiment shows an example in which three bus bar electrodes 12 are formed, the number is not limited to three, and may be two, or the number of bus bar electrodes 12 corresponding to the size of the solar battery cell 10 may be provided. It may be formed.
　太陽電池セル１０の受光面が太陽光を受けると、光生成キャリア、すなわち、電子および正孔が生成される。フィンガー電極１１は受光面で生成された光生成キャリアを集電する。バスバー電極１２はフィンガー電極１１により集電された光生成キャリアを集電する。 When the light receiving surface of the solar battery cell 10 receives sunlight, photogenerated carriers, that is, electrons and holes are generated. The finger electrode 11 collects photogenerated carriers generated on the light receiving surface. The bus bar electrode 12 collects the photogenerated carriers collected by the finger electrode 11.
　図２は、本実施形態の製造装置により製造される太陽電池ストリング２０の側面図であり、図３はその平面図である。太陽電池ストリング２０は、フィンガー電極１１およびバスバー電極１２が形成された複数の太陽電池セル１０と、配線材２１と、樹脂接着剤２２とを備えている。 FIG. 2 is a side view of the solar cell string 20 manufactured by the manufacturing apparatus of the present embodiment, and FIG. 3 is a plan view thereof. The solar cell string 20 includes a plurality of solar cells 10 on which the finger electrodes 11 and the bus bar electrodes 12 are formed, a wiring material 21, and a resin adhesive 22.
　複数の太陽電池セル１０は、バスバー電極１２と平行な方向に一列に配置される。一本の配線材２１は、太陽電池セル１０のバスバー電極１２が形成される方向の２倍程度の長さであり、その中央に段差が設けられる。段差を挟んで配線材２１の一端側の上側に太陽電池セル１０が配置され、他端側の下側に隣接する太陽電池セル１０が配置される。そして、配線材２１はこれら２つの太陽電池セル１０を接続する。より具体的には、各配線材２１は、太陽電池セル１０の表面に形成されたバスバー電極１２のうちの１つと、隣接する太陽電池セル１０の裏面に形成されたバスバー電極１２のうちの１つとを電気的に接続する。 The plurality of solar cells 10 are arranged in a row in a direction parallel to the bus bar electrode 12. One wiring member 21 is about twice as long as the direction in which the bus bar electrode 12 of the solar battery cell 10 is formed, and a step is provided at the center thereof. The solar battery cell 10 is arranged on the upper side on one end side of the wiring member 21 across the step, and the adjacent solar battery cell 10 is arranged on the lower side of the other end side. The wiring member 21 connects these two solar cells 10. More specifically, each wiring member 21 includes one of the bus bar electrodes 12 formed on the surface of the solar battery cell 10 and one of the bus bar electrodes 12 formed on the back surface of the adjacent solar battery cell 10. Are electrically connected.
　樹脂接着剤２２はバスバー電極１２と配線材２１の間に介挿され、これらを接着する。樹脂接着剤２２は、例えば導電性粒子としてニッケル粒子を含む熱硬化性エポキシ樹脂である。樹脂接着剤２２を加圧することで導電性粒子が潰れて、樹脂接着剤２２は導電性を有するようになる。また、樹脂接着剤２２は、例えば、５０℃～９０℃で加熱すると軟化し、ハンダの融解温度より低い１３０～１８０℃で加熱すると硬化する。 Resin adhesive 22 is inserted between the bus bar electrode 12 and the wiring member 21 to bond them together. The resin adhesive 22 is, for example, a thermosetting epoxy resin containing nickel particles as conductive particles. By pressurizing the resin adhesive 22, the conductive particles are crushed, and the resin adhesive 22 has conductivity. The resin adhesive 22 softens when heated at, for example, 50 ° C. to 90 ° C., and cures when heated at 130 to 180 ° C., which is lower than the melting temperature of the solder.
　図２の太陽電池ストリング２０をＥＶＡ（エチレンビニルアセテート）等の充填材を介してカバーガラスで封止したものが太陽電池モジュールである。 2 is a solar cell module in which the solar cell string 20 of FIG. 2 is sealed with a cover glass through a filler such as EVA (ethylene vinyl acetate).
　図４は、太陽電池ストリングの製造装置（以下、製造装置）１００の側面図である。図４の製造装置は、検査装置３０と、接着剤貼付装置４０と、配線材投入装置５０と、配線材圧着装置６０と、太陽電池セル投入装置７０とを備えている。同図の製造装置１００は、図１の太陽電池セル１０を用いて図２の太陽電池ストリング２０を製造するものである。 FIG. 4 is a side view of a solar cell string manufacturing apparatus (hereinafter referred to as manufacturing apparatus) 100. The manufacturing apparatus of FIG. 4 includes an inspection device 30, an adhesive sticking device 40, a wiring material charging device 50, a wiring material crimping device 60, and a solar cell charging device 70. The manufacturing apparatus 100 of the figure manufactures the solar cell string 20 of FIG. 2 using the solar cell 10 of FIG.
　検査装置３０は、太陽電池セル１０に割れがないか等、外形の検査を行うとともに、太陽電池セル投入装置７０が正しい位置で太陽電池セル１０を把持できるよう位置調整を行う。接着剤貼付装置４０は、太陽電池セル１０の表面および裏面に形成されたバスバー電極１２のそれぞれの上に樹脂接着剤２２を貼り付ける。配線材投入装置５０は配線材２１に段差を設け、配線材圧着装置６０に投入する。配線材圧着装置６０は、樹脂接着剤２２を加圧および加熱して、太陽電池セル１０のバスバー電極１２に配線材２１を圧着する。太陽電池セル投入装置７０は太陽電池セル１０をエア等により吸着し、検査後の太陽電池セル１０を接着剤貼付装置４０へ、および、接着剤が貼り付けられた太陽電池セル１０を配線材圧着装置６０へそれぞれ投入する。 The inspection device 30 inspects the outer shape, such as whether the solar battery cell 10 is cracked, and adjusts the position so that the solar battery cell insertion device 70 can hold the solar battery cell 10 at the correct position. The adhesive sticking device 40 sticks the resin adhesive 22 on each of the bus bar electrodes 12 formed on the front surface and the back surface of the solar battery cell 10. The wiring material feeding device 50 provides a step in the wiring material 21 and feeds it to the wiring material crimping device 60. The wiring material crimping device 60 pressurizes and heats the resin adhesive 22 to crimp the wiring material 21 to the bus bar electrode 12 of the solar battery cell 10. The solar cell loading device 70 adsorbs the solar cell 10 with air or the like, and the solar cell 10 after the inspection is bonded to the adhesive application device 40 and the solar cell 10 with the adhesive applied is crimped to the wiring material. Each is loaded into the device 60.
　図５は、太陽電池ストリング２０の製造工程図である。まず、検査装置３０は太陽電池セル１０の検査を行う（ステップＳ１）。検査で異常が認められなければ、太陽電池セル投入装置７０は検査済の太陽電池セル１０を検査装置３０から取り出し、接着剤貼付装置４０へ投入する。 FIG. 5 is a manufacturing process diagram of the solar cell string 20. First, the inspection device 30 inspects the solar battery cell 10 (step S1). If no abnormality is found in the inspection, the solar cell loading device 70 takes out the inspected solar cell 10 from the inspection device 30 and inserts it into the adhesive application device 40.
　そして、接着剤貼付装置４０は太陽電池セル１０のバスバー電極１２に樹脂接着剤２２を貼り付ける（ステップＳ２）。接着剤貼付装置４０の詳細については後述するが、接着剤貼付装置４０は、太陽電池の表面および裏面に３つずつ形成されるバスバー電極１２のそれぞれに同時に樹脂接着剤２２を貼り付けることで、熱や圧力による太陽電池セル１０への負荷を軽減し、かつ、短時間で貼付を行うことができる。 Then, the adhesive sticking device 40 sticks the resin adhesive 22 to the bus bar electrode 12 of the solar battery cell 10 (step S2). Although details of the adhesive sticking device 40 will be described later, the adhesive sticking device 40 simultaneously sticks the resin adhesive 22 to each of the bus bar electrodes 12 formed on the front surface and the back surface of the solar cell, The load on the solar battery cell 10 due to heat and pressure can be reduced, and the application can be performed in a short time.
　次に、配線材投入装置５０は段差が設けられた３本の配線材２１を配線材圧着装置６０に投入する（ステップＳ３）。このとき、図４に示すように、各配線材２１は、段差を挟んでその一端が、先に配線材圧着装置６０に投入された太陽電池セル１０の表面側の各バスバー電極１２上に配置されるよう、投入される。そして、太陽電池セル投入装置７０は、樹脂接着剤２２が貼り付けられた太陽電池セル１０を、配線材圧着装置６０に投入された配線材２１の他端上に投入する（ステップＳ４）。このとき、太陽電池セル１０は、各配線材２１上に太陽電池セル１０の裏面側のバスバー電極１２が配置されるよう、投入される。 Next, the wiring material input device 50 inputs the three wiring materials 21 provided with steps to the wiring material crimping device 60 (step S3). At this time, as shown in FIG. 4, one end of each wiring member 21 is arranged on each bus bar electrode 12 on the surface side of the solar battery cell 10 that has been put into the wiring member crimping device 60 before the step. To be inserted. Then, the solar cell loading device 70 throws the solar cell 10 to which the resin adhesive 22 is attached onto the other end of the wiring member 21 put into the wiring member crimping device 60 (step S4). At this time, the solar cells 10 are put in such a manner that the bus bar electrodes 12 on the back surface side of the solar cells 10 are arranged on each wiring member 21.
　そして、配線材圧着装置６０は、樹脂接着剤２２を加圧および加熱して、配線材２１と太陽電池セル１０のバスバー電極１２とを圧着する（ステップＳ５）。配線材圧着装置６０の詳細については後述するが、後述するように、配線材圧着装置６０は、加熱を複数工程に分けて行うことで、スループットを向上できる。また、太陽電池セル１０ごとに圧着を行うため、配線材圧着装置６０を小型化できる。 The wiring material crimping device 60 pressurizes and heats the resin adhesive 22 to crimp the wiring material 21 and the bus bar electrode 12 of the solar battery cell 10 (step S5). Although details of the wiring material crimping device 60 will be described later, as will be described later, the wiring material crimping device 60 can improve throughput by performing heating in a plurality of steps. Moreover, since crimping | bonding is carried out for every photovoltaic cell 10, the wiring material crimping | compression-bonding apparatus 60 can be reduced in size.
　以下、本実施形態の１つ目の特徴である接着剤貼付装置４０について、詳しく説明する。 Hereinafter, the adhesive sticking device 40 which is the first feature of the present embodiment will be described in detail.
　図６は、接着剤貼付装置４０の正面図であり、図７は、図６を紙面左側から見た側面図である。接着剤貼付装置４０は、上面貼付部４１ａと、下面貼付部４１ｂとを備えている。上面貼付部４１ａは太陽電池セル１０の表面側のバスバー電極１２（以下、単に電極１２と呼ぶ）に樹脂接着剤２２を貼り付け、下面貼付部４１ｂは裏面側の電極１２に樹脂接着剤２２を貼り付ける。 FIG. 6 is a front view of the adhesive application device 40, and FIG. 7 is a side view of FIG. 6 viewed from the left side of the drawing. The adhesive sticking device 40 includes an upper face sticking part 41a and a lower face sticking part 41b. The upper surface sticking portion 41a sticks the resin adhesive 22 to the bus bar electrode 12 (hereinafter simply referred to as the electrode 12) on the surface side of the solar battery cell 10, and the lower surface sticking portion 41b attaches the resin adhesive 22 to the electrode 12 on the back surface side. paste.
　上面貼付部４１ａは、３つの供給リール４２ａと、ハーフカット部４３ａと、圧着部材４４ａと、剥ぎ取りローラ４５ａと、３つの回収リール４６ａと、搬送ローラ４７１ａ～４７４ａとを有する。 The upper surface sticking portion 41a includes three supply reels 42a, a half cut portion 43a, a pressure bonding member 44a, a peeling roller 45a, three recovery reels 46a, and conveying rollers 471a to 474a.
　３つの供給リール４２ａは太陽電池セル１０の電極１２の間隔に合わせて設けられる。各供給リール４２ａには、剥離紙２３が付着した帯状の樹脂接着剤２２（以下、剥離紙付き樹脂接着剤２４と呼ぶ）を巻いたものがセットされる。搬送ローラ（第１の搬送ローラ）４７１ａが回転すると、剥離紙付き樹脂接着剤２４は供給リール４２ａから引き出され、ハーフカット部４３ａに供給される。なお、剥離紙付き樹脂接着剤２４は、上面貼付部４１ａの外側に樹脂接着剤２２が、内側に剥離紙２３がそれぞれ設けられる。 The three supply reels 42 a are provided in accordance with the distance between the electrodes 12 of the solar battery cell 10. Each supply reel 42a is set with a belt-shaped resin adhesive 22 (hereinafter referred to as a resin adhesive 24 with release paper) wound with the release paper 23 attached thereto. When the transport roller (first transport roller) 471a rotates, the resin adhesive 24 with release paper is pulled out from the supply reel 42a and supplied to the half-cut portion 43a. In addition, the resin adhesive 24 with release paper is provided with the resin adhesive 22 on the outer side of the upper surface sticking portion 41a and the release paper 23 on the inner side.
　ハーフカット部４３ａは、剥離紙付き樹脂接着剤２４の樹脂接着剤２２のみを電極１２の長さに合わせてカットする。搬送ローラ（第２の搬送ローラ）４７２ａが回転すると、剥離紙付き樹脂接着剤２４は、ハーフカット部４３ａから、太陽電池セル１０の電極１２と対向する位置に供給される。圧着部材４４ａは剥離紙付き樹脂接着剤２４を太陽電池セル１０の表面側の電極１２上に加圧および加熱して、樹脂接着剤２２と電極１２とを圧着する。剥ぎ取りローラ４５ａは剥離紙付き樹脂接着剤２４から剥離紙２３を剥ぎ取る。回収リール４６ａは、搬送ローラ４７３ａ，４７４ａが回転することにより、剥ぎ取られた剥離紙２３を回収する。 The half-cut portion 43 a cuts only the resin adhesive 22 of the resin adhesive 24 with release paper according to the length of the electrode 12. When the transport roller (second transport roller) 472a rotates, the resin adhesive 24 with release paper is supplied from the half-cut portion 43a to a position facing the electrode 12 of the solar battery cell 10. The pressure-bonding member 44 a presses and heats the resin adhesive 24 with release paper on the electrode 12 on the surface side of the solar battery cell 10 to pressure-bond the resin adhesive 22 and the electrode 12. The stripping roller 45a strips the release paper 23 from the resin adhesive 24 with release paper. The collection reel 46a collects the peeled release paper 23 as the transport rollers 473a and 474a rotate.
　なお、図７では３つの搬送ローラ４７１ａにより３つの剥離紙付き樹脂接着剤２４を搬送する例を示しているが、１つの搬送ローラで３つの剥離紙付き樹脂接着剤２４を搬送してもよい。また、同図では１つのハーフカット部４３ａで３つの剥離紙付き樹脂接着剤２４をカットしているが、３つのハーフカット部を設けて、それぞれ１つずつの樹脂接着剤２２をカットしてもよい。 7 shows an example in which the three resin adhesives 24 with release paper are conveyed by the three conveyance rollers 471a, but the three resin adhesives 24 with release paper may be conveyed by one conveyance roller. . Moreover, in the same figure, the three resin adhesives 24 with release paper are cut by one half-cut part 43a, but three half-cut parts are provided, and each one resin adhesive 22 is cut. Also good.
　下面貼付部４１ｂの構成は上面貼付部４１ａの構成とほぼ同様であり、図６および図７では、下面貼付部４１ｂの各構成部材には、符号“ｂ”を付している。但し、図７に示すように、圧着部材４４ｂの形状が圧着部材４４ａとは異なっている。その理由は、太陽電池セル投入装置７０は太陽電池セル１０の上面側を把持するためであり、上面貼付部４１ａの圧着部材４４ａに凹凸を形成することで、圧着部材４４ａは太陽電池セル投入装置７０を避けて樹脂接着剤２２と電極１２とを圧着できる。 The configuration of the lower surface pasting portion 41b is substantially the same as the configuration of the upper surface pasting portion 41a. In FIG. 6 and FIG. However, as shown in FIG. 7, the shape of the crimping member 44b is different from that of the crimping member 44a. The reason is that the solar cell loading device 70 grips the upper surface side of the solar cell 10, and the crimping member 44 a is formed by forming irregularities on the crimping member 44 a of the upper surface sticking portion 41 a, so that the solar cell loading device is The resin adhesive 22 and the electrode 12 can be pressure-bonded while avoiding 70.
　圧着部材（第１の圧着部材）４４ａおよび圧着部材（第２の圧着部材）４４ｂは圧着部を構成する。また、搬送ローラ４７３ａ，４７３ｂ，４７４ａ，４７４ｂおよび回収リール４６ａ，４６ｂは回収部を構成する。 The crimping member (first crimping member) 44a and the crimping member (second crimping member) 44b constitute a crimping part. Further, the transport rollers 473a, 473b, 474a, 474b and the collection reels 46a, 46b constitute a collection unit.
　図８は、太陽電池セル１０の電極１２に樹脂接着剤２２を貼り付けるための工程図であり、図５のステップＳ２を詳細に示したものである。まず、予め剥離紙付き樹脂接着剤２４を供給リール４２ａ，４２ｂにセットしておく（ステップＳ１１）。 FIG. 8 is a process diagram for attaching the resin adhesive 22 to the electrode 12 of the solar battery cell 10, and shows step S2 of FIG. 5 in detail. First, the resin adhesive 24 with release paper is set in advance on the supply reels 42a and 42b (step S11).
　次に、太陽電池セル投入装置７０により太陽電池セル１０が接着剤貼付装置４０に投入される（ステップＳ１２）。より具体的には、太陽電池セル投入装置７０は、上面貼付部４１ａと下面貼付部４１ｂとの間で、太陽電池セル１０を把持する。図９は、太陽電池セル投入装置７０により把持される太陽電池セル１０の上面図である。図示のように、太陽電池セル投入装置７０の先端部はフォーク状の把持部材を有し、その間隙に太陽電池セル１０の電極１２を配置して、エア等により太陽電池セル１０を把持する。 Next, the solar battery cell 10 is put into the adhesive sticking device 40 by the solar battery feeding device 70 (step S12). More specifically, the solar cell loading device 70 holds the solar battery cell 10 between the upper surface pasting portion 41a and the lower surface pasting portion 41b. FIG. 9 is a top view of the solar cell 10 held by the solar cell loading device 70. As shown in the figure, the tip of the solar cell loading device 70 has a fork-shaped gripping member, the electrode 12 of the solar cell 10 is disposed in the gap, and the solar cell 10 is gripped by air or the like.
　次に、搬送ローラ４７１ａ～４７４ａ，４７１ｂ～４７４ｂが回転して、太陽電池セル１０の電極１２のそれぞれに対向する位置に剥離紙付き樹脂接着剤２４が供給される（ステップＳ１３）とともに、後に投入される太陽電池セル１０のために、ハーフカット部４３ａ，４３ｂが剥離紙付き樹脂接着剤２４の樹脂接着剤２２のみを、電極１２の長さに合わせてカットする（ステップＳ１４）。すなわち、太陽電池セル１０の電極１２には、電極１２の長さに合わせてカットされた樹脂接着剤２２が供給される。 Next, the transport rollers 471a to 474a and 471b to 474b are rotated so that the resin adhesive 24 with release paper is supplied to the positions facing the electrodes 12 of the solar battery cell 10 (step S13), and later charged. For the solar battery cell 10 to be processed, the half- cut portions 43a and 43b cut only the resin adhesive 22 of the resin adhesive 24 with release paper according to the length of the electrode 12 (step S14). That is, the resin adhesive 22 cut according to the length of the electrode 12 is supplied to the electrode 12 of the solar battery cell 10.
　このとき、上面貼付部４１ａが電極１２の数と同じ３つの供給リール４２ａを有するため、太陽電池セル１０の表面側の３つの電極１２の全てに対向するように剥離紙付き樹脂接着剤２４が供給される。太陽電池セル１０の裏面側についても同様である。 At this time, since the upper surface sticking portion 41a has the same three supply reels 42a as the number of the electrodes 12, the resin adhesive 24 with release paper is placed so as to face all the three electrodes 12 on the surface side of the solar battery cell 10. Supplied. The same applies to the back side of the solar battery cell 10.
　次に、以下のようにして、太陽電池セル１０の電極１２に樹脂接着剤２２を接着させる（ステップＳ１５）。図１０は、太陽電池セル１０の電極１２に樹脂接着剤２２を接着させる時の接着剤貼付装置４０の正面図であり、図１１は、図１０の太陽電池セル１０付近の拡大図である。また、図１２は、図１０を紙面左側から見た側面図であり、図１３は、図１２の太陽電池セル１０付近の拡大図である。なお、図１１では、太陽電池セル投入装置７０を省略している。 Next, the resin adhesive 22 is adhered to the electrode 12 of the solar battery cell 10 as follows (step S15). FIG. 10 is a front view of the adhesive application device 40 when the resin adhesive 22 is adhered to the electrode 12 of the solar battery cell 10, and FIG. 11 is an enlarged view of the vicinity of the solar battery cell 10 of FIG. 12 is a side view of FIG. 10 viewed from the left side of the drawing, and FIG. 13 is an enlarged view of the vicinity of the solar battery cell 10 of FIG. In FIG. 11, the solar cell loading device 70 is omitted.
　まず、エアシリンダ等により、上面貼付部４１ａの圧着部材４４ａが下降し、下面貼付部４１ｂの圧着部材４４ｂが上昇する。これにより、図１０および図１１に示すように、太陽電池セル１０の各電極１２に剥離紙付き樹脂接着剤２４が接触する。また、図１１に示すように、ステップＳ１４で、樹脂接着剤２２は電極１２の長さに合わせてカットされている。 First, the crimping member 44a of the upper surface pasting portion 41a is lowered by the air cylinder or the like, and the crimping member 44b of the lower surface pasting portion 41b is raised. Thereby, as shown in FIGS. 10 and 11, the resin adhesive 24 with release paper comes into contact with each electrode 12 of the solar battery cell 10. Further, as shown in FIG. 11, in step S <b> 14, the resin adhesive 22 is cut in accordance with the length of the electrode 12.
　ここで、図１２および図１３に示すように、下面貼付部４１ｂの圧着部材４４ｂの表面は平坦であるのに対し、上面貼付部４１ａの圧着部材４４ａの表面には凹凸が形成されている。これは、太陽電池セル１０の上面側を太陽電池セル投入装置７０が把持するためである。すなわち、圧着部材４４ａは凹部で太陽電池セル投入装置７０先端の把持部材を避けて、凸部で剥離紙付き樹脂接着剤２４を太陽電池セル１０の電極１２に接触させる。 Here, as shown in FIG. 12 and FIG. 13, the surface of the crimping member 44b of the lower surface pasting portion 41b is flat, while the surface of the crimping member 44a of the upper surface pasting portion 41a is uneven. This is because the solar cell loading device 70 grips the upper surface side of the solar cell 10. That is, the crimping member 44 a avoids the gripping member at the tip of the solar cell loading device 70 at the concave portion, and causes the resin adhesive 24 with release paper to contact the electrode 12 of the solar cell 10 at the convex portion.
　さらに、圧着部材４４ａ，４４ｂは、約４．５秒間、上下の剥離紙付き樹脂接着剤２４および太陽電池セル１０の電極１２を挟み込んで加圧しつつ、樹脂接着剤２２の軟化温度より高く硬化温度より低い温度、例えば５０℃～９０℃で加熱する。これにより、樹脂接着剤２２が軟化して太陽電池セル１０の電極１２に貼り付く。その後、上面貼付部４１ａの圧着部材４４ａは上昇し、下面貼付部４１ｂの圧着部材４４ｂは下降する。 Furthermore, the pressure- bonding members 44a and 44b have a curing temperature higher than the softening temperature of the resin adhesive 22 while sandwiching and pressing the resin adhesive 24 with the upper and lower release paper and the electrode 12 of the solar battery cell 10 for about 4.5 seconds. Heat at a lower temperature, for example 50 ° C. to 90 ° C. Thereby, the resin adhesive 22 is softened and adhered to the electrode 12 of the solar battery cell 10. Thereafter, the pressure-bonding member 44a of the upper surface pasting portion 41a is raised, and the pressure bonding member 44b of the lower surface pasting portion 41b is lowered.
　図１０～図１３に示すように、全ての電極１２に同時に剥離紙付き樹脂接着剤２４を加圧および加熱するため、図８のステップＳ１５の工程を一度行うだけで、全ての電極１２に接着剤を貼り付けることができる。したがって、熱や圧力による太陽電池セル１０への負荷を軽減し、かつ、短時間で貼付を行うことができる。 As shown in FIGS. 10 to 13, in order to pressurize and heat the resin adhesive 24 with release paper to all the electrodes 12 at the same time, the step S15 in FIG. An agent can be attached. Therefore, the load on the solar battery cell 10 due to heat and pressure can be reduced, and the application can be performed in a short time.
　次に、剥離紙２３を樹脂接着剤２２から剥ぎ取る（ステップＳ１６）。図１４は、剥離紙２３を剥ぎ取る時の接着剤貼付装置４０の正面図である。同図に示すように、エアシリンダ等により剥ぎ取りローラ４５ａ，４５ｂを太陽電池セル１０の上および下で移動させつつ、チャック（不図示）により剥離紙２３を両面から挟んで引っ張って、太陽電池の電極１２に貼り付けられた樹脂接着剤２２から剥離紙２３を剥ぎ取る。剥ぎ取りが終了すると、剥ぎ取りローラ４５ａ，４５ｂは図６に示す元の位置に戻る。剥ぎ取られた剥離紙２３は、搬送ローラ４７３ａ，４７４ａ，４７３ｂ，４７４ｂが回転することにより、回収リール４６ａ，４６ｂに巻き取られる。 Next, the release paper 23 is peeled off from the resin adhesive 22 (step S16). FIG. 14 is a front view of the adhesive application device 40 when the release paper 23 is peeled off. As shown in the figure, the peeling rollers 45a and 45b are moved above and below the solar battery cell 10 by an air cylinder or the like, and the release paper 23 is pulled from both sides by a chuck (not shown) to pull the solar battery. The release paper 23 is peeled off from the resin adhesive 22 attached to the electrode 12. When the stripping is completed, the stripping rollers 45a and 45b return to the original positions shown in FIG. The peeled release paper 23 is wound around the collection reels 46a and 46b by the rotation of the transport rollers 473a, 474a, 473b, and 474b.
　その後、太陽電池セル投入装置７０により太陽電池セル１０は貼付装置から取り出される（ステップＳ１７）。以上により、太陽電池セル１０の電極１２に樹脂接着剤２２を貼り付けることができる。 Thereafter, the solar cell 10 is taken out from the sticking device by the solar cell loading device 70 (step S17). As described above, the resin adhesive 22 can be attached to the electrode 12 of the solar battery cell 10.
　このように、本実施形態の接着剤貼付装置４０では、剥離紙付き樹脂接着剤２４を太陽電池セル１０の電極１２と同じ数だけ用い、太陽電池セル１０の表面側および裏面側から挟み込んで加圧および加熱する。そのため、全ての電極１２に同時に樹脂接着剤２２を貼り付けることができ、太陽電池セル１０への負荷が軽減するとともに、樹脂接着剤２２の貼付時間を短縮できる。 As described above, in the adhesive sticking device 40 of the present embodiment, the same number of the resin adhesives 24 with release paper as the electrodes 12 of the solar battery cell 10 are used and sandwiched from the front surface side and the back surface side of the solar battery cell 10 to be added. Pressure and heat. Therefore, the resin adhesive 22 can be applied to all the electrodes 12 at the same time, so that the load on the solar battery cell 10 is reduced and the application time of the resin adhesive 22 can be shortened.
　次に、本実施形態の２つ目の特徴である配線材圧着装置６０について、詳しく説明する。 Next, the wiring material crimping device 60, which is the second feature of this embodiment, will be described in detail.
　図４の配線材圧着装置６０は、投入部７１と、仮圧着部７２と、本圧着部７３と、第１の加熱部７４と、第２の加熱部７５と、これら各部に共通して用いられる搬送装置６１および加熱装置６２とを備えている。投入部７１から第２の加熱部７５までの各部は、搬送装置６１上で、太陽電池セル１０の１枚分程度のスペースを占有する。 The wiring material crimping apparatus 60 of FIG. 4 is used in common for the input unit 71, the temporary crimping unit 72, the main crimping unit 73, the first heating unit 74, and the second heating unit 75. A transporting device 61 and a heating device 62 are provided. Each unit from the input unit 71 to the second heating unit 75 occupies a space of about one solar cell 10 on the transport device 61.
　搬送装置６１は太陽電池セル１０を投入部７１から第２の加熱部７５の順に、各段での処理が終わる毎に、次段へ搬送する。加熱装置６２は太陽電池セル１０を加熱する。加熱装置６２は、投入部７１から第２の加熱部７５の各部で、それぞれ異なる温度で太陽電池セル１０を加熱できる。 The transport device 61 transports the solar battery cells 10 to the next stage in the order from the charging unit 71 to the second heating unit 75 each time the processing in each stage is completed. The heating device 62 heats the solar battery cell 10. The heating device 62 can heat the solar battery cells 10 at different temperatures from the charging unit 71 to the second heating unit 75.
　投入部７１には、配線材２１、および、樹脂接着剤２２が電極１２に貼り付けられた太陽電池セル１０が投入される。仮圧着部７２は押さえ部材６３を有し、押さえ部材６３による加圧と加熱装置６２による加熱により、配線材２１と太陽電池セル１０とを仮圧着する。本圧着部７３は下面が水平な加圧部材６４を有し、樹脂接着剤２２に圧力を加えて樹脂接着剤２２に含まれるニッケル等の導電性粒子を潰し、導電性を得る。さらに、加圧部材６４の下面には加熱装置６４ａが設けられ、加熱装置６２と合わせて、樹脂接着剤２２を加熱する。第１の加熱部７４および第２の加熱部７５は非接触加熱装置６５を共有し、樹脂接着剤２２を加熱して硬化させる。非接触加熱装置６５は、例えばＩＲ（赤外線）ランプや、ＩＨ（誘導加熱）、ホットエア等である。 The solar cell 10 in which the wiring member 21 and the resin adhesive 22 are attached to the electrode 12 is input to the input unit 71. The temporary pressure bonding part 72 has a pressing member 63, and temporarily press-bonds the wiring member 21 and the solar battery cell 10 by pressurization by the pressing member 63 and heating by the heating device 62. The main crimping portion 73 has a pressure member 64 whose bottom surface is horizontal, and applies pressure to the resin adhesive 22 to crush conductive particles such as nickel contained in the resin adhesive 22 to obtain conductivity. Further, a heating device 64 a is provided on the lower surface of the pressure member 64, and the resin adhesive 22 is heated together with the heating device 62. The first heating unit 74 and the second heating unit 75 share the non-contact heating device 65 and heat and cure the resin adhesive 22. The non-contact heating device 65 is, for example, an IR (infrared) lamp, IH (induction heating), hot air, or the like.
　図１５は、太陽電池セル１０に配線材２１を圧着するための工程図であり、図５のステップＳ５を詳細に示したものである。まず、太陽電池セル投入装置７０は樹脂接着剤が貼り付けられた太陽電池セル１０を、配線材投入装置５０は配線材２１を、それぞれ配線材圧着装置６０の投入部に投入する（ステップＳ２１）。より具体的には、太陽電池セル投入装置７０は既に投入された配線材２１の上に太陽電池セル１０を投入し、配線材投入装置５０は段差が設けられた配線材２１をその太陽電池セル１０の上に投入する。投入部７１では、次の工程のために、加熱装置６２を用いて樹脂接着剤２２を予熱してもよい。 FIG. 15 is a process diagram for crimping the wiring member 21 to the solar battery cell 10, and shows step S5 of FIG. 5 in detail. First, the solar cell input device 70 inputs the solar cell 10 to which the resin adhesive is attached, and the wiring material input device 50 inputs the wiring material 21 into the input portion of the wiring material crimping device 60 (step S21). . More specifically, the solar cell loading device 70 throws the solar battery cell 10 onto the wiring material 21 that has already been thrown in, and the wiring material throwing device 50 places the wiring material 21 with a step into the solar cell. 10 on top. In the charging unit 71, the resin adhesive 22 may be preheated using the heating device 62 for the next step.
　ステップＳ２１の工程に要する時間は、例えば６秒間である。太陽電池セル１０および配線材２１が投入されると、搬送装置６１はこれらを仮圧着部７２に搬送するとともに、次の太陽電池セル１０および配線材２１が投入される。つまり、６秒間に１枚の割合で太陽電池セル１０が次々に投入部７１に投入される。 The time required for the step S21 is, for example, 6 seconds. When the solar battery cell 10 and the wiring material 21 are introduced, the transport device 61 transports them to the temporary pressure bonding part 72 and the next solar battery cell 10 and the wiring material 21 are introduced. That is, the solar cells 10 are sequentially inserted into the input unit 71 at a rate of one sheet every 6 seconds.
　次に、仮圧着部７２において、加熱装置６２により樹脂接着剤２２の軟化温度より高く硬化温度より低い温度、例えば５０℃～９０℃で加熱しながら、押さえ部材６３で配線材２１および太陽電池セル１０を加圧し、樹脂接着剤２２を軟化させて配線材２１と太陽電池セル１０とを仮圧着する（ステップＳ２２）。太陽電池セル１０の表面および裏面には同じ位置に電極１２が形成されるため、太陽電池セル１０の表面および裏面の両方の配線材２１が仮圧着される。これにより、後の工程で、太陽電池セル１０上で配線材２１がずれるのを防げる。 Next, in the temporary crimping portion 72, the wiring member 21 and the solar battery cell are pressed by the pressing member 63 while being heated by the heating device 62 at a temperature higher than the softening temperature of the resin adhesive 22 and lower than the curing temperature, for example, 50 to 90 ° C. 10 is pressurized, the resin adhesive 22 is softened, and the wiring member 21 and the solar battery cell 10 are temporarily pressure-bonded (step S22). Since the electrodes 12 are formed at the same position on the front surface and the back surface of the solar battery cell 10, the wiring members 21 on both the front surface and the back surface of the solar battery cell 10 are temporarily pressed. Thereby, it can prevent that the wiring material 21 slip | deviates on the photovoltaic cell 10 at a later process.
　ステップＳ２２の工程に要する時間は、例えば３秒間である。前の太陽電池セル１０の投入工程（ステップＳ２１）が６秒間を要するため、本工程が３秒間で終了してすぐに、次の太陽電池セル１０が投入部７１から仮圧着部７２へ搬送されるわけではない。そのため、仮圧着が３秒間で終了し、さらに３秒間待機して、仮圧着部に合計６秒間留まった後に、搬送装置６１は太陽電池セル１０を仮圧着部７２から本圧着部７３へ搬送するとともに、投入部７１から仮圧着部７２へ次の太陽電池セル１０を搬送する。 The time required for the process of step S22 is, for example, 3 seconds. Since the charging process (step S21) of the previous solar battery cell 10 requires 6 seconds, the next solar battery cell 10 is transferred from the charging part 71 to the temporary pressure bonding part 72 as soon as this process is completed in 3 seconds. I don't mean. Therefore, after the temporary press-bonding is completed in 3 seconds and waits for another 3 seconds and stays in the temporary press-bonding portion for a total of 6 seconds, the transport device 61 transports the solar cell 10 from the temporary press-bonding portion 72 to the main press-bonding portion 73. At the same time, the next solar battery cell 10 is transported from the charging unit 71 to the temporary pressure bonding unit 72.
　本圧着部７３において、加圧部材６４で２～３ＭＰａ程度で樹脂接着剤２２を加圧して本圧着する。これにより、樹脂接着剤２２に含まれる導電性粒子が潰れ、導電性が得られる。なお、加圧部材６４の下面は平坦になっている。太陽電池セル１０の上に配線材２１が載置されているため、加圧部材６４で加圧する際に、加圧部材６４が太陽電池セル１０と接触することはない。 In the final press bonding part 73, the pressure bonding member 64 presses the resin adhesive 22 at about 2 to 3 MPa and performs the final press bonding. Thereby, the electroconductive particle contained in the resin adhesive 22 is crushed, and electroconductivity is obtained. Note that the lower surface of the pressure member 64 is flat. Since the wiring member 21 is placed on the solar battery cell 10, the pressurizing member 64 does not come into contact with the solar battery cell 10 when pressurizing with the pressurizing member 64.
　ここで、加圧部材６４の下部には加熱装置６４ａが設けられており、加圧だけでなく、樹脂接着剤２２を硬化させるための加熱をすることもできる。本圧着に要する時間は、例えば３秒間であり、樹脂接着剤２２を硬化させるのに要する時間は、例えば１５秒間である。そのため、仮に加圧部材６４および加熱装置６４ａを用いて、本圧着と同時に樹脂接着剤２２が完全に硬化するまで加熱する場合、１５秒間加熱する必要がある。そうすると、この工程がボトルネックとなって、全体のスループットが低下してしまう。 Here, a heating device 64a is provided below the pressurizing member 64, and not only pressurization but also heating for curing the resin adhesive 22 can be performed. The time required for the main pressure bonding is, for example, 3 seconds, and the time required for curing the resin adhesive 22 is, for example, 15 seconds. Therefore, if heating is performed using the pressure member 64 and the heating device 64a until the resin adhesive 22 is completely cured simultaneously with the main pressing, it is necessary to heat for 15 seconds. In this case, this process becomes a bottleneck, and the overall throughput decreases.
　すなわち、太陽電池セル１０が配線材圧着装置６０に投入されてから、その太陽電池セル１０への配線材２１の圧着が終了するまでに要するタクトタイムは、６秒（ステップＳ２１）＋６秒（ステップＳ２２）＋１５秒（本圧着および樹脂接着剤２２を完全に硬化させるための加熱１５秒間）＝２７秒であり、スループットは、樹脂接着剤２２を硬化させるための加熱が１５秒間かかるために、１５秒に１個（毎分４個）の太陽電池セル１０となってしまう。 That is, the tact time required from when the solar battery cell 10 is inserted into the wiring material crimping device 60 to when the crimping of the wiring material 21 to the solar battery cell 10 is completed is 6 seconds (step S21) +6 seconds (step) S22) +15 seconds (main compression and heating for completely curing the resin adhesive 22 for 15 seconds) = 27 seconds, and the throughput takes 15 seconds because the heating for curing the resin adhesive 22 takes 15 seconds. One solar cell 10 per second (four per minute) is obtained.
　そこで、本実施形態では、これまでの工程（ステップＳ２１，Ｓ２２および本圧着）の最長時間はステップＳ２１の６秒間であることに着目し、ステップＳ２３で樹脂接着剤２２を完全に硬化させるのではなく、硬化ための加熱を複数工程に分けて行う。 Therefore, in the present embodiment, paying attention to the fact that the longest time of the processes so far (steps S21 and S22 and main press bonding) is 6 seconds of step S21, the resin adhesive 22 is not completely cured in step S23. However, heating for curing is performed in a plurality of steps.
　まず、ステップＳ２３では、樹脂接着剤２３を加圧して本圧着するのと並行して、加熱装置６２および加熱装置６４ａにより、樹脂接着剤２２の硬化温度より高い温度、例えば１３０℃～１８０℃で樹脂接着剤２２を加熱する（ステップＳ２３）。本工程では、樹脂接着剤２２の硬化に必要な１５秒間のうち、３秒間だけ加熱する。 First, in step S23, in parallel with the press bonding of the resin adhesive 23 and the main pressure bonding, the heating device 62 and the heating device 64a are used at a temperature higher than the curing temperature of the resin adhesive 22, for example, 130 ° C. to 180 ° C. The resin adhesive 22 is heated (step S23). In this step, heating is performed for 3 seconds out of 15 seconds necessary for curing the resin adhesive 22.
　そして３秒間本圧着部７３で待機した後に、第１の加熱部７４へ搬送し、第１および第２の加熱部７５で、残りの１２秒間を２回に分けて加熱する。すなわち、第１の加熱部７４において、加熱装置６２および非接触加熱装置６５により、上記温度で６秒間加熱する（ステップＳ２４）。さらに、第２の加熱部７５に搬送して、同様に６秒間加熱する（ステップＳ２５）。第１および第２の加熱部７４，７５は非接触加熱装置６５を共有しており、２枚の太陽電池セル１０を同時に加熱できる。 Then, after waiting for 3 seconds in the main crimping section 73, the sheet is transported to the first heating section 74 and heated by the first and second heating sections 75 in the remaining 12 seconds in two portions. That is, in the 1st heating part 74, it heats for 6 second at the said temperature with the heating apparatus 62 and the non-contact heating apparatus 65 (step S24). Furthermore, it conveys to the 2nd heating part 75, and similarly heats for 6 second (step S25). The 1st and 2nd heating parts 74 and 75 share the non-contact heating apparatus 65, and can heat the two photovoltaic cells 10 simultaneously.
　第２の加熱部７５では、本圧着部７３と第１の加熱部７４での加熱時間と合わせて合計１５秒間加熱される。これにより、樹脂接着材３３の硬化に要する時間に達し、樹脂接着剤３３は硬化して、配線材２１と太陽電池セル１０の電極１２が接着される。 The second heating unit 75 is heated for a total of 15 seconds together with the heating time in the main crimping unit 73 and the first heating unit 74. Thereby, the time required for the resin adhesive 33 to cure is reached, the resin adhesive 33 is cured, and the wiring member 21 and the electrode 12 of the solar battery cell 10 are bonded.
　このようにすると、ステップＳ２１～Ｓ２５の工程が全て６秒（ステップＳ２２，Ｓ２３は待機時間の３秒と合わせて６秒）となる。そのため、タクトタイムは、６秒×５（ステップＳ２１～Ｓ２５）＝３０秒となるが、スループットを６秒に１個（毎分１０個）の太陽電池セル１０に改善できる。 In this way, the processes of steps S21 to S25 are all 6 seconds (steps S22 and S23 are 6 seconds including the standby time of 3 seconds). Therefore, the tact time is 6 seconds × 5 (steps S21 to S25) = 30 seconds, but the throughput can be improved to one solar cell 10 in 6 seconds (10 pieces per minute).
　また、図４の配線材圧着装置６０は、全ての太陽電池セル１０を仮圧着した後に樹脂接着剤２２の硬化を行うのではなく、太陽電池セル１０ごとに行うため、配線材圧着装置６０の大きさは、接続する太陽電池セル１０の数に関わらず、投入部７１～第２の加熱部７５に対応する太陽電池セル１０の５枚分程度よい。 Moreover, since the wiring material crimping device 60 of FIG. 4 does not harden the resin adhesive 22 after all the solar cells 10 are temporarily crimped, it is performed for each solar cell 10. The size may be about five of the solar cells 10 corresponding to the input unit 71 to the second heating unit 75 regardless of the number of solar cells 10 to be connected.
　このように、本実施形態の配線材圧着装置６０では、最も長い時間が必要な、樹脂接着剤２２を硬化させる加熱工程を複数に分けて行う。そのため、高いスループットで太陽電池ストリング２０を生成できる。また、太陽電池セル１０ごとに硬化を行うため、配線材圧着装置６０を小型化できる。 Thus, in the wiring material crimping apparatus 60 according to the present embodiment, the heating process for curing the resin adhesive 22 that requires the longest time is performed in a plurality of steps. Therefore, the solar cell string 20 can be generated with high throughput. Moreover, since hardening is performed for each solar battery cell 10, the wiring material crimping device 60 can be reduced in size.
　上述した図１５の各ステップの時間は例示であり、実際の時間に応じて、樹脂接着剤２２の硬化を複数の工程に分ければよい。例えば、ステップＳ２１の工程が３秒である場合、ステップＳ２３で３秒間加熱した後、残りの１２秒間を４工程に分ける（つまり、第１の加熱部７４を３つ設ける）ことで、スループットを３秒に１個にできる。また、例えば、ステップＳ２１の工程よりステップＳ２２の工程での所要時間が長い場合は、各加熱部での加熱時間がステップＳ２２の工程の所要時間以下となるようにすればよい。 The time of each step in FIG. 15 described above is an example, and the curing of the resin adhesive 22 may be divided into a plurality of processes according to the actual time. For example, if the process of step S21 is 3 seconds, after heating for 3 seconds in step S23, the remaining 12 seconds are divided into 4 processes (that is, three first heating parts 74 are provided), thereby reducing the throughput. One in 3 seconds. For example, when the required time in the process of step S22 is longer than the process of step S21, the heating time in each heating unit may be set to be shorter than the required time of the process in step S22.
　上記の記載に基づいて、当業者であれば、本発明の追加の効果や種々の変形を想到できるかもしれないが、本発明の態様は、上述した個々の実施形態には限定されるものではない。特許請求の範囲に規定された内容およびその均等物から導き出される本発明の概念的な思想と趣旨を逸脱しない範囲で種々の追加、変更および部分的削除が可能である。 Based on the above description, those skilled in the art may be able to conceive additional effects and various modifications of the present invention, but the aspects of the present invention are not limited to the individual embodiments described above. Absent. Various additions, modifications, and partial deletions can be made without departing from the concept and spirit of the present invention derived from the contents defined in the claims and equivalents thereof.
１０　太陽電池セル
１１　フィンガー電極
１２　バスバー電極
２０　太陽電池ストリング
２１　配線材
２２　樹脂接着剤
２３　剥離紙
２４　剥離紙付き樹脂接着剤
３０　検査装置
４０　接着剤貼付装置
４１ａ　上面貼付部
４１ｂ　下面貼付部
４２ａ，４２ｂ　供給リール
４３ａ，４３ｂ　ハーフカット部
４４ａ，４４ｂ　圧着部材
４５ａ，４５ｂ　剥ぎ取りローラ
４６ａ，４６ｂ　回収リール
４７１ａ～４７４ａ，４７１ｂ～４７４ｂ　搬送ローラ
５０　配線材投入装置
６０　配線材圧着装置
６１　搬送装置
６２，６４ａ　加熱装置
６３　押さえ部材
６４　加圧部材
６５　非接触加熱装置
７０　太陽電池セル投入装置
７１　投入部
７２　仮圧着部
７３　本圧着部
７４　第１の加熱部
７５　第２の加熱部
１００　太陽電池ストリングの製造装置 DESCRIPTION OF SYMBOLS 10 Solar cell 11 Finger electrode 12 Bus bar electrode 20 Solar cell string 21 Wiring material 22 Resin adhesive 23 Release paper 24 Release resin resin adhesive 30 Inspection apparatus 40 Adhesive sticking apparatus 41a Upper surface sticking part 41b Lower surface sticking part 42a, 42b Supply reels 43a, 43b Half cut portions 44a, 44b Crimping members 45a, 45b Stripping rollers 46a, 46b Recovery reels 471a-474a, 471b-474b Conveying roller 50 Wiring material charging device 60 Wiring material crimping device 61 Conveying devices 62, 64a Heating Device 63 Holding member 64 Pressure member 65 Non-contact heating device 70 Solar cell loading device 71 Loading portion 72 Temporary pressure bonding portion 73 Main pressure bonding portion 74 First heating portion 75 Second heating portion 100 Manufacturing device for solar cell string

Claims (10)

  1. 　対向する第１および第２主面にそれぞれ電極が形成され所定方向に列設された複数の太陽電池セルと、
    　前記複数の太陽電池セルのうち、隣接する２つの太陽電池セルの一方の前記第１主面側の前記電極と他方の前記第２主面側の前記電極とに電気的に接続される配線材と、
    　前記電極と前記配線材との間に介挿される樹脂接着剤と、を備える太陽電池ストリングの製造装置であって、
    　前記電極のそれぞれの上に前記樹脂接着剤を貼り付ける接着剤貼付装置と、
    　前記樹脂接着剤のそれぞれの上に前記配線材を配置した状態で、前記電極と前記配線材とを圧着する配線材圧着装置と、を備え、
    　前記接着剤貼付装置は、前記第１および第２主面側の前記電極上に前記樹脂接着剤が接着されるように、前記第１主面側の前記電極および前記樹脂接着剤を圧着するとともに加熱し、かつ、前記第２主面側の前記電極および前記樹脂接着剤を圧着するとともに加熱する圧着部を有することを特徴とする太陽電池ストリングの製造装置。     A plurality of solar cells each having electrodes formed on opposite first and second main surfaces and arranged in a predetermined direction;
    Wiring material electrically connected to one of the electrodes on the first main surface side and the other electrode on the second main surface side of two adjacent solar cells among the plurality of solar cells. When,
    A resin string manufacturing device comprising a resin adhesive interposed between the electrode and the wiring member,
    An adhesive application device for attaching the resin adhesive on each of the electrodes;
    A wiring material crimping device that crimps the electrode and the wiring material in a state where the wiring material is disposed on each of the resin adhesives,
    The adhesive pasting device crimps the electrode on the first main surface side and the resin adhesive so that the resin adhesive is adhered onto the electrodes on the first and second main surface sides. An apparatus for manufacturing a solar cell string, comprising: a heating and crimping portion that crimps and heats the electrode and the resin adhesive on the second main surface side.
  2. 　前記樹脂接着剤は、帯状の剥離紙に付着しており、
    　前記接着剤貼付装置は、前記電極上に前記樹脂接着剤を貼り付ける前に、前記剥離紙に付着した前記樹脂接着剤のみを前記電極の長さに合わせてカットするハーフカット部を有することを特徴とする請求項１に記載の太陽電池ストリングの製造装置。     The resin adhesive is attached to a strip-shaped release paper,
    The adhesive sticking device has a half-cut portion that cuts only the resin adhesive attached to the release paper according to the length of the electrode before sticking the resin adhesive on the electrode. The solar cell string manufacturing apparatus according to claim 1, wherein
  3. 　前記接着剤貼付装置は、前記樹脂接着剤が前記電極のそれぞれの上に貼り付けられた後に、前記樹脂接着剤から前記剥離紙を剥ぎ取って、剥ぎ取った前記剥離紙を回収する回収部を有することを特徴とする請求項２に記載の太陽電池ストリングの製造装置。 The adhesive sticking device includes a collecting unit that peels off the release paper from the resin adhesive and collects the peeled release paper after the resin adhesive is attached to each of the electrodes. The solar cell string manufacturing apparatus according to claim 2, comprising:
  4. 　前記接着剤貼付装置は、
    　前記太陽電池セルの前記第１および第２主面側の前記電極の数と同数分だけ設けられ、前記剥離紙に付着した前記樹脂接着剤を供給する供給リールと、
    　前記供給リールから前記ハーフカット部に前記樹脂接着剤を搬送する第１の搬送ローラと、
    　前記ハーフカット部から対応する前記電極上に前記樹脂接着剤を搬送する第２の搬送ローラと、を有することを特徴とする請求項２または３に記載の太陽電池ストリングの製造装置。     The adhesive application device is
    A supply reel that supplies the resin adhesive attached to the release paper by the same number as the number of the electrodes on the first and second main surface sides of the solar battery cell;
    A first transport roller for transporting the resin adhesive from the supply reel to the half-cut portion;
    4. The solar cell string manufacturing apparatus according to claim 2, further comprising: a second transport roller configured to transport the resin adhesive onto the corresponding electrode from the half-cut portion. 5.
  5. 　前記圧着部は、前記第１および第２主面側の前記電極上に前記樹脂接着剤を接着するために、前記樹脂接着剤と前記第１および第２主面側の前記電極を加圧するとともに、前記樹脂接着剤の軟化温度より高く、硬化温度より低い温度に加熱することを特徴とする請求項１乃至４のいずれかに記載の太陽電池ストリングの製造装置。 The pressure-bonding portion pressurizes the resin adhesive and the electrodes on the first and second main surfaces in order to adhere the resin adhesive on the electrodes on the first and second main surfaces. The apparatus for producing a solar cell string according to any one of claims 1 to 4, wherein the solar cell string is heated to a temperature higher than a softening temperature of the resin adhesive and lower than a curing temperature.
  6. 　前記太陽電池セルを把持して前記接着剤貼付装置および前記配線材圧着装置に順次搬送するフォーク状の把持部材を有する太陽電池セル投入装置を備え、
    　前記太陽電池セル投入装置は、前記把持部材の間隙に前記第１または第２主面に形成される電極が配置されるように前記太陽電池セルを把持することを特徴とする請求項１乃至５のいずれかに記載の太陽電池ストリングの製造装置。     A solar cell loading device having a fork-shaped gripping member that grips the solar cells and sequentially conveys them to the adhesive application device and the wiring material crimping device,
    6. The solar cell loading device grips the solar cell so that an electrode formed on the first or second main surface is disposed in a gap between the gripping members. The manufacturing apparatus of the solar cell string in any one of.
  7. 　前記圧着部は、前記第１主面側の前記電極および前記樹脂接着剤を圧着する第１の圧着部材と、前記第２主面側の前記電極および前記樹脂接着剤を圧着する第２の圧着部材と、を有し、
    　前記第１または第２の圧着部材の表面には凹凸が形成され、凹部で前記太陽電池セル投入装置の把持部材を避け、凸部で前記電極上に前記電極および前記樹脂接着剤を圧着することを特徴とする請求項６に記載の太陽電池ストリングの製造装置。     The crimping portion includes a first crimping member that crimps the electrode and the resin adhesive on the first principal surface side, and a second crimping member that crimps the electrode and the resin adhesive on the second principal surface side. A member, and
    Concavities and convexities are formed on the surface of the first or second crimping member, the gripping member of the solar cell loading device is avoided in the concave portion, and the electrode and the resin adhesive are crimped on the electrode in the convex portion. The manufacturing apparatus of the solar cell string of Claim 6 characterized by these.
  8. 　対向する第１および第２主面にそれぞれ電極が形成され所定方向に列設された複数の太陽電池セルと、
    　前記複数の太陽電池セルのうち、隣接する２つの太陽電池セルの一方の前記第１主面側の前記電極と他方の前記第２主面側の前記電極とに電気的に接続される配線材と、
    　前記電極と前記配線材との間に介挿される樹脂接着剤と、を備える太陽電池ストリングの製造方法であって、
    　前記第１および第２主面側の前記電極上に前記樹脂接着剤が接着されるように、前記第１主面側の前記電極および前記樹脂接着剤を圧着するとともに加熱し、かつ、前記第２主面側の前記電極および前記樹脂接着剤を圧着するとともに加熱する工程と、
    　前記樹脂接着剤のそれぞれの上に前記配線材を配置した状態で、前記電極と前記配線材とを圧着する工程と、を備えることを特徴とする太陽電池ストリングの製造方法。     A plurality of solar cells each having electrodes formed on opposite first and second main surfaces and arranged in a predetermined direction;
    Wiring material electrically connected to one of the electrodes on the first main surface side and the other electrode on the second main surface side of two adjacent solar cells among the plurality of solar cells. When,
    A resin adhesive interposed between the electrode and the wiring material, and a method for manufacturing a solar cell string,
    The electrode and the resin adhesive on the first main surface side are pressure-bonded and heated so that the resin adhesive is adhered onto the electrodes on the first and second main surface sides, and the first 2 crimping and heating the electrode and the resin adhesive on the main surface side;
    A step of crimping the electrode and the wiring member in a state where the wiring member is disposed on each of the resin adhesives.
  9. 　太陽電池セルの、対向する第１および第２主面にそれぞれ形成された電極の上に樹脂接着剤を貼り付ける接着剤貼付装置であって、
    　前記第１および第２主面側の前記電極上に前記樹脂接着剤が接着されるように、前記第１主面側の前記電極および前記樹脂接着剤を圧着するとともに加熱し、かつ、前記第２主面側の前記電極および前記樹脂接着剤を圧着するとともに加熱する圧着部を備えることを特徴とする接着剤貼付装置。     An adhesive sticking device for sticking a resin adhesive on the electrodes formed on the first and second main surfaces facing each other of the solar battery cell,
    The electrode and the resin adhesive on the first main surface side are pressure-bonded and heated so that the resin adhesive is bonded onto the electrodes on the first and second main surface sides, and the first 2. An adhesive sticking device comprising: a crimping section that crimps and heats the electrode and the resin adhesive on the two principal surface sides.
  10. 　太陽電池セルの、対向する第１および第２主面にそれぞれ形成された電極の上に樹脂接着剤を貼り付ける接着剤貼付方法であって、
    　前記第１および第２主面側の前記電極上に前記樹脂接着剤が接着されるように、前記第１主面側の前記電極および前記樹脂接着剤を圧着するとともに加熱し、かつ、前記第２主面側の前記電極および前記樹脂接着剤を圧着するとともに加熱する工程を備えることを特徴とする接着剤貼付方法。     An adhesive application method for attaching a resin adhesive on the electrodes respectively formed on the first and second main surfaces facing each other of the solar battery cell,
    The electrode and the resin adhesive on the first main surface side are pressure-bonded and heated so that the resin adhesive is bonded onto the electrodes on the first and second main surface sides, and the first (2) A method for applying an adhesive, comprising a step of crimping and heating the electrode and the resin adhesive on the two main surfaces.
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