WO2012018110A1 - Solar cell element connecting apparatus - Google Patents

Solar cell element connecting apparatus Download PDF

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Publication number
WO2012018110A1
WO2012018110A1 PCT/JP2011/067942 JP2011067942W WO2012018110A1 WO 2012018110 A1 WO2012018110 A1 WO 2012018110A1 JP 2011067942 W JP2011067942 W JP 2011067942W WO 2012018110 A1 WO2012018110 A1 WO 2012018110A1
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WO
WIPO (PCT)
Prior art keywords
solar cell
cell element
tab lead
lead wire
magnetic core
Prior art date
Application number
PCT/JP2011/067942
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French (fr)
Japanese (ja)
Inventor
壽美 西尾
長泰 中村
高橋　裕一
Original Assignee
アロニクス株式会社
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Publication date
Application filed by アロニクス株式会社 filed Critical アロニクス株式会社
Priority to JP2012527782A priority Critical patent/JPWO2012018110A1/en
Publication of WO2012018110A1 publication Critical patent/WO2012018110A1/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/002—Soldering by means of induction heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
    • B23K3/04—Heating appliances
    • B23K3/047—Heating appliances electric
    • B23K3/0475—Heating appliances electric using induction effects, e.g. Kelvin or skin effects
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • B23K2101/38—Conductors
    • 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 element connecting apparatus for connecting solar cell elements with tab lead wires, and in particular, it is possible to quickly bond tab lead wires to solar cell elements, and the productivity and energy efficiency are high and inexpensive.
  • the present invention relates to a connection device capable of supplying a solar cell panel.
  • Solar cells are power generation systems that directly convert sunlight, which is inexhaustible and free from environmental pollution, into electrical energy, and the range of use is rapidly expanding from residential to large-scale power generation.
  • the crystal system is a step of forming a module by electrically connecting a plurality of solar cell elements with tab lead wires after passing through the manufacturing process of the solar cell element, It is manufactured through a process of laminating a module between a transparent cover material and a protective material.
  • various types of solar cells especially amorphous silicon solar cells and crystalline silicon solar cells can be manufactured in a large area and are inexpensive to manufacture.
  • the development of production technology for modularization and systemization has been further promoted over several years, leading to the practical application of small power generators of about 3 KW to large power generators of several hundred KW.
  • An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a connecting device that can supply a solar cell panel at a low cost with a high bonding speed, high productivity and high energy efficiency.
  • a solar cell element connecting device for connecting solar cell elements with tab lead wires, and heating means for heating and bonding the tab lead wires to the solar cell elements.
  • it is a substantially rectangular induction heating coil that is long in the extending direction of the tab lead wire, and includes a solar cell element connection device in which a magnetic core made of a soft magnetic material is inserted in the induction heating coil.
  • the second feature of the present invention includes the above connection device in which the length of the magnetic core in the extending direction is substantially equal to the length of the solar cell element in the extending direction.
  • the third feature of the present invention further includes the above connection device in which pressing pins for pressing the tab lead wire against the solar cell element are arranged in the extending direction of the tab lead wire.
  • the fourth feature of the present invention includes the above connection device in which the magnetic core is composed of a plurality of small magnetic cores, and the pressing pins and the small magnetic cores are alternately arranged in the induction heating coil.
  • the fifth feature of the present invention includes the above solar cell element connection device in which at least some of the small magnetic cores can be changed in height independently of other small magnetic cores.
  • the sixth feature of the present invention includes the above connection device in which the pressing pin is made of ceramics that is not induction-heated.
  • the seventh feature of the present invention includes the above connection device in which a thin plate made of an insulator is interposed between the induction heating coil and the magnetic core.
  • the heating means for heat-bonding the tab lead wire to the solar cell element has a substantially rectangular shape that is long in the extending direction of the tab lead wire (hereinafter sometimes simply referred to as the extending direction). It is an induction heating coil, and since a magnetic core made of a soft magnetic material is inserted in the induction heating coil, the magnetic field lines are used efficiently, and the tab lead wire can be heated rapidly, so the time for connection is shortened, Productivity improves and the manufacturing cost of a solar cell can be reduced.
  • the tab lead wire can be bonded onto the electrode array of the solar cell element at a time, so that the work efficiency is improved.
  • the pressing pins are arranged in the extending direction of the solar cell elements, a plurality of small magnetic cores are provided, and the pressing pins and the magnetic cores are alternately arranged, the solar cell elements and the tab lead wires are held by the pressing pins in a molten state. Since it is pressure-bonded, it can be more easily bonded, and can be suitably connected even if the amount of melted solder is small, and the time required for melting and connecting the solder can be reduced, and the manufacturing cost of the solar cell can be reduced.
  • the small magnetic core is lowered at the portion where heating is strongly desired and the small magnetic core is raised at the portion where heating is weakened. Fine temperature control is possible.
  • the presser pin is made of ceramic that is not induction-heated, the presser pin will not generate heat, and the solder on that part, especially the solder attached to the upper side of the tab lead wire will be difficult to melt. This makes it difficult to prevent a trouble that the tab lead wire is peeled off from the solar cell element when the pressing pin is removed.
  • FIG. 1 is a schematic view of a solar cell element connection device of the present invention.
  • FIG. 2A is a schematic sectional view showing an example of an adhesive head used in the present invention
  • FIG. 2B is a schematic diagram showing a case where the adhesive head of FIG. (C) is a schematic cross-sectional view showing another example of an adhesive head used in the present invention
  • (d) is an adhesive head of (c) used for a so-called back electrode type solar cell element.
  • FIG. 3A is a front view showing an example of an adhesive head used in the present invention
  • FIG. 3B is a cross-sectional view taken along the line AA in FIG. FIG.
  • FIG. 4A is a front view showing still another example of the bonding head used in the present invention
  • FIG. 4B is a sectional view taken along the line BB in FIG.
  • FIG. 5A is a front view showing still another example of the bonding head used in the present invention
  • FIG. 5B is a sectional view taken along the line CC in FIG.
  • FIG. 6A is a front view showing still another example of the bonding head used in the present invention
  • FIG. 6B is a DD cross-sectional view of FIG.
  • FIG. 7A is a front view showing still another example of the bonding head used in the present invention
  • FIG. 7B is an EE cross-sectional view of FIG. FIG.
  • FIG. 8A is a schematic sectional view of a small magnetic core used in the example of FIG. 7, and FIG. 8B is a plan view thereof.
  • FIG. 9 is a schematic cross-sectional view showing another example of a structure for raising and lowering a small magnetic core.
  • FIG. 9A shows a state where the small magnetic core is lowered
  • FIG. 9B shows a state where the small magnetic core is raised.
  • FIG. 10 is a schematic explanatory view showing an example of use of the induction heating coil of FIG. 7, where (a) shows a case where a tab lead wire is heated and bonded to a small solar cell element, and (b) shows a case where the solar cell element is against the induction heating coil. (C) shows a countermeasure when the end portion of the solar cell element becomes hotter than the other portions.
  • FIG. 11 is a schematic cross-sectional view of the pressing pin used in the examples of FIGS.
  • the solar cell element connection device 1 of the present invention is a solar cell element connection device 1 for connecting solar cell elements S with tab lead wires T.
  • the heating means for heat-bonding to each other is an induction heating coil 3 having a substantially rectangular shape that is long in the extending direction, and a magnetic core 4 made of a soft magnetic material is inserted into the induction heating coil 3.
  • an adhesion head 2 a structure in which the magnetic core 4 is inserted through the induction heating coil 3 may be referred to as an adhesion head 2.
  • the tab lead wire T used in the present invention may be a normal one.
  • a commercially available standard product flat, about 2 mm wide and about 0.16 mm thick copper foil is coated on both sides with about 40 ⁇ m thick solder. Can be used).
  • a copper foil tape to which solder or the like is not applied is used as the tab lead wire T, and a conductive adhesive is applied on the electrode E of the solar cell element S, and then the tab lead wire T made of the copper foil tape is applied thereon. It may be placed and glued.
  • the means for applying the adhesive may be a regular method. For example, after applying the adhesive to a tape-like release paper, the adhesive-attached release paper is pasted on the electrode E, and then only the release paper is applied. The method of removing can be illustrated.
  • the heat bonding means that the solder applied around the tab lead wire T is melted and the tab lead wire T is soldered to the solar cell element S, or either the tab lead wire T or the solar cell element S is used. Adhering the solar cell element S and the tab lead wire T by heating the tab lead wire T disposed on the solar cell element S, such as thermosetting and adhering the conductive adhesive applied to the crab Say.
  • the connection device for solar cell elements S of the present invention includes a solar cell element S supplied by a solar cell element supply means 8 and a tab lead wire T supplied by a tab lead wire supply means 7. It is related with the device for connecting with.
  • This type of connecting device includes at least a moving means for moving the solar cell element S and the tab lead wire T to an appropriate position and a heating means for heating and bonding the tab lead wire T to the solar cell element S.
  • preheating means and cooling means for accelerating the melting and cooling and solidification of solder as used in conventional connection devices, cracking of solar cell elements by preventing rapid temperature changes and reducing thermal stress
  • a constant temperature means for preventing chipping, a correcting means for correcting warpage of the solar cell element, and the like can be added.
  • the solar cell element supply means, the tab lead wire supply means, the preheating means, the cooling means, the constant temperature means, the correction means, and other means for reducing the manufacturing cost, improving the quality, and improving the yield are described in the present invention.
  • the solar cell element connection device may be manufactured integrally, or may be manufactured separately and used in combination with the connection device of the present invention.
  • a moving means 9 and an adhesive head 2 having an induction heating coil 3 and a magnetic core 4 are attached to a support base 6, and a solar cell element supply means 8 and a tab lead wire supply means. 7 is provided.
  • the solar cell element S and the tab lead wire T supplied by the solar cell element supply means 8 and the tab lead wire supply means 7 are arranged at appropriate positions by the moving means 9, and the tab lead wire T is moved by the bonding head 2 to the sun. It is configured to be bonded to the battery element S.
  • the adhesive head 2 rises along the rail 6a and waits until the solar cell element S and the tab lead wire T are arranged at appropriate positions, and the solar cell element S and the tab lead wire T are appropriate.
  • the tab lead wire T is attached to the solar cell element S by being lowered after being arranged at a proper position.
  • the heating means for heating and bonding the tab lead wire T to the solar cell element S is the induction heating coil 3.
  • the induction heating coil 3 is connected to a high-frequency power source (not shown), and a rapid magnetic flux change is caused by flowing a high-frequency current generated by the high-frequency power source to the induction heating coil 3, thereby causing a tab lead wire based on the principle of electromagnetic induction. T is heated.
  • the induction heating coil 3 self-heats when a high-frequency current is passed through the induction heating coil 3, but the self-heating of the induction heating coil 3 is made into a hollow tube, and cooling water is passed through the lead wire so You may comprise so that the heat by heat_generation
  • the induction heating coil 3 in the present invention is provided for heating the tab lead wire T disposed on the solar cell element S. Therefore, the induction heating coil 3 has a substantially rectangular shape that is long in the extending direction of the tab lead wire T so that the tab lead wire T can be heated at a time.
  • the long side needs to be a straight line so that the entire tab lead wire T can be uniformly heated. Can be provided, or the entire short side can be semicircular. That is, regardless of the shape on the short side, a straight line with a parallel long side is included in the substantially rectangular shape referred to in the present invention.
  • the width of the induction heating coil 3 (the length in the direction perpendicular to the extending direction) is such that the hollow portion of the induction heating coil 3 covers the electrode E, as shown in FIGS.
  • the width of the line T is preferably about the same. However, in the case where two or more rows of electrodes E are provided close to each other like the back electrode type solar cell element S which has started to be used in recent years, it is shown in FIGS. 2 (c) and 2 (d). As described above, the width may be such that the row of the two electrodes E or the two tab lead wires T are collectively covered.
  • the number of turns of the induction heating coil 3 may be such that the solder adhering to the surface of the tab lead wire T can be heated to an appropriate temperature.
  • FIG. 2 to FIG. 7 show the induction heating coil 3 wound twice, it is not limited to this, and a sufficient temperature can be obtained by winding it about 1 to 3 times.
  • the frequency of the high-frequency current used for the dielectric heating may be such that the tab lead wire T can be heated to an appropriate temperature for heat-bonding the solar cell element S to the solar cell element S. Specifically, about 150 to 400 kHz is appropriate.
  • the magnetic core 4 is inserted into the induction heating coil 3. Since the magnetic core 4 is for efficiently causing the magnetic force lines generated from the induction heating coil 3 to act on the tab lead wire T, it is necessary that the magnetic core 4 be made of a soft magnetic material. used.
  • the specific material is not particularly limited as long as it is a soft magnetic material excellent in magnetic permeability, and a conductive material such as silicon steel may be used. Ferrite that does not easily generate heat is preferable. Examples of suitable ferrites include manganese zinc ferrite, nickel zinc ferrite, copper zinc ferrite and the like.
  • an insulator between the induction heating coil 3 and the magnetic core 4.
  • an insulator it does not specifically limit as an insulator to be used, A silicon resin and a polyimide resin can be illustrated. Further, an insulating tape may be wound around the induction heating coil 3.
  • the lead wire forming the induction heating coil 3 is made into a hollow tubular shape and cooling water is passed through the lead wire, it is preferable because the magnetic core 4 can be simultaneously cooled by using an insulator having high thermal conductivity.
  • an insulator having such a high thermal conductivity a material in which a ceramic filler is highly filled in silicone, for example, trade name: DENKA radiating sheet manufactured by Denki Kagaku Kogyo Co., Ltd. can be exemplified.
  • the shape of the magnetic core 4 is not particularly limited as long as the magnetic force lines can be efficiently applied to the tab lead wires T.
  • the battery element S is substantially equal to the length in the extending direction
  • the width is approximately equal to the width of the tab lead wire T
  • the height is such that the induction heating coil 3 can be wound a predetermined number of times. If the length in the extending direction of the magnetic core is substantially equal to the length in the extending direction of the solar cell element S as in the magnetic core 4 described in FIGS. Since the tab lead wire T on the electrode E can be heated and melted at a time, the working efficiency is improved.
  • the length is approximately equal to the length of the solar cell element S in the extending direction
  • the width is approximately equal to the width of the tab lead wire T
  • the height is such that the induction heating coil 3 can be wound a predetermined number of times.
  • a magnetic core 4 in which insertion holes 4a for inserting the pressing pins 5 are linearly arranged in the extending direction. This structure is suitable when the tab lead wire T is pressed using the pressing pin 5 and connected. When such a magnetic core 4 is used, a temperature drop in the vicinity of the pressing pin 5 can be suppressed by minimizing the size of the gap of the magnetic core 4 for providing the pressing pin 5, and the tab lead wire is heated uniformly. Can be glued.
  • the magnetic core 4 As another example of the magnetic core 4, a structure in which a plurality of small magnetic cores 4s are arranged in a plurality of rows as shown in FIGS. More specifically, in the case where the pressing pins 5 are arranged in the extending direction of the tab lead wire T, the induction heating coil 3 is provided so as to surround the row of the pressing pins 5 as in the conventional solar cell element connecting device. In addition, one small magnetic core 4s is arranged between each holding pin 5 and one end or both ends of the row of holding pins 5 as necessary, that is, the holding pins 5 and the small magnetic cores 4s are alternately arranged. Can do. FIG. 5 shows an example in which small magnetic cores 4 s are provided at both ends of the holding pin 5.
  • the solar cell element S and the tab lead wire T are pressure-bonded by the pressing pin in a state where the solder is melted. It becomes easy to bond and can be suitably connected even if the amount of heated and melted liquid solder is small, and the time required for melting and connecting the solder can be shortened, so that the productivity is improved and the manufacturing cost of the solar cell panel is reduced. be able to.
  • the tab lead wire T can be bonded at a relatively low temperature.
  • both ends are small magnetic cores 4 s.
  • both ends are set as pressing pins 5 as shown in FIG. 6, the end of the tab lead wire T does not float at the time of heat bonding, The effect that the tab lead wire T can be suitably bonded is obtained.
  • the shape of the small magnetic core 4 s is not particularly limited as long as the holding pins 5 and the small magnetic core 4 s can be alternately arranged in the induction heating coil.
  • a columnar shape or the like is preferable because it can be easily inserted into the induction heating coil and easily arranged alternately with the pressing pins 5.
  • the magnetic core 4 and the small magnetic core 4s may have their lower ends projecting from the lower surface of the induction heating coil 3. However, as shown in FIGS. Since it is more efficient, it is preferable to provide it.
  • the height of at least some of the small magnetic cores can be changed independently of other small magnetic cores.
  • the structure for changing the height of the small magnetic core 4s is not particularly limited.
  • An example is a cylindrical core portion 4s2 that is provided and provided with concavities and convexities (in the example shown in FIG. 8, a cross-shaped depression for a plus driver) provided on the top.
  • a motor or the like may be fixed to the core 4s2 and mechanically rotated, or the surface of the adjacent pressing pin 5 or induction heating coil instead of the sheath 4s1 A female screw may be engraved on the inner surface of 3.
  • the pulling rod 4b is connected to the small magnetic core 4s, and the small magnetic core 4s is lifted as necessary.
  • a configuration in which the height of the small magnetic core 4s is maintained by pulling out from the induction heating coil 3 and engaging the stopper 4c with the protrusion 4b1 of the lifting rod 4b can be exemplified. With such a configuration, the height of the small magnetic core 4s can be easily changed, so that workability is excellent.
  • the lifting rod 4b is manually lifted, but the small magnetic core 4 may be lifted directly by an actuator or the like.
  • the small magnetic core 4s As described above, if the height of the small magnetic core 4s can be changed independently of other small magnetic cores, the small magnetic core is lowered at a portion where heating is strongly desired and the small magnetic core is raised at a portion where heating is weakened. Fine temperature control can be performed, and it becomes possible to suppress the heating of the portion that does not require heating or to uniformly heat the portion that requires heating. For example, if the heights of several small magnetic cores 4 s can be changed from the end portion, it is possible to deal with various types of solar cell elements having different lengths in the stretching direction with one heating means. That is, as shown in FIG.
  • the magnetic force can be applied uniformly by adjusting the height of the small magnetic core. Can do. That is, as shown in FIG. 10B, even when the bonding head 2 and the solar cell element S are not parallel, the height of the small magnetic core 4s is changed little by little, and the lower end of the small magnetic core 4s and the solar cell are changed. If the distance to the element S is adjusted to be constant, the magnetic force acting on the tab lead wire T and the solar cell element S becomes uniform, and the amount of heat generation becomes substantially constant, so that the tab lead wire T is uniformly heated and bonded. be able to.
  • the temperature can be made uniform by raising the small magnetic cores near the both ends. can do. That is, depending on the positional relationship between the end of the solar cell element S and the small magnetic core 4s, the end of the solar cell element S may be in a high temperature state. In such a case, as shown in FIG. Furthermore, if the height of the small magnetic core 4s on the end of the solar cell element S is increased to reduce the amount of magnetism acting on that portion, the amount of heat generation becomes substantially constant, so the tab lead wire T is made uniform. It can be heated and bonded.
  • the function corresponding to various kinds of solar cell elements S, the function corresponding to the inclination of the solar cell element S, and the function corresponding to the phenomenon that the end portion of the solar cell element S becomes high are as described above. It is merely a desired function for adjusting the image, and it is not necessary to provide all of the above functions.
  • the material of the pressing pin 5 is a substance that is not induction-heated. If the holding pin 5 is made of a material that is not electromagnetically induced, when the normal tab lead wire T with the solder attached around the copper foil is used, the holding pin 5 does not generate heat, and the solder, particularly the tab lead wire, does not generate heat. Since the solder adhering to the upper side of the pin is difficult to melt, the presser pin 5 and the tab lead wire T are difficult to adhere, and the tab lead wire T is peeled off from the solar cell element S when the presser pin 5 is removed. Trouble can be prevented.
  • the pressing pin 5 not only the pressing pin 5 but also the elastic means 5a and the guide 5b that urge the pressing pin 5 toward the solar cell element S may be a substance that is not induction-heated.
  • the pressing pin 5 and the guide 5b can be made of ceramics that are not induction-heated, and the elastic means 5a can be made of heat-resistant plastic.
  • the structure of the pressing pin 5 is not particularly limited, the pressing pin 5 is attached in a hollow guide 5b as shown in FIG. 11, and the pressing pin 5 can be inserted and removed. A configuration in which the pressing pin 5 is urged outward by the elastic means 5a can be exemplified.
  • the solar cell element S connected by the solar cell element connection device 1 of the present invention is not particularly limited.
  • the solar cell element can be connected even if it is a so-called back electrode type in which the electrode E is provided on the back surface as shown in FIG.
  • the material all conventionally used single crystal silicon, polycrystalline silicon, and the like can be used.
  • the heating means for heating and bonding the tab lead wire to the solar cell element is a substantially rectangular induction heating coil that is long in the extending direction of the tab lead wire.
  • a magnetic core made of a soft magnetic material is inserted into the induction heating coil, it is possible to quickly bond the tab lead wire to the solar cell element by effectively using the magnetic field lines coming out of the induction heating coil. And the manufacturing cost of the solar cell can be reduced.
  • the solar cell element and the tab lead wire are crimped with the holding pins in a molten state, so that it becomes easier to bond, and a part of the small magnetic cores can be attached to other small magnetic cores.
  • the height can be adjusted independently of each other, so that even when partially heated or the solar cell element is inclined, the height of the small magnetic core is adjusted uniformly according to the inclination. It can be heated and bonded.

Abstract

Provided is a solar cell element connecting apparatus for connecting solar cell elements using a tab lead line (T). The solar cell element connecting apparatus (1) is characterized in that a heating means for bonding, with heat, the tab lead line (T) to the solar cell elements is an induction heating coil (3), which is long in the extending direction of the tab lead line (T), and which has a substantially rectangular shape, and that a magnetic core (4) composed of a soft magnetic material is inserted into the induction heating coil (3). This invention makes it possible to rapidly bond the tab lead line to the solar cell elements, improves productivity and energy efficiency, and supplies a solar cell panel at low cost.

Description

太陽電池素子の接続装置Device for connecting solar cell elements
　本発明は、太陽電池素子をタブリード線により接続させる太陽電池素子の接続装置に係り、特に、タブリード線を太陽電池素子に迅速に接着することができるとともに、生産性及びエネルギー効率が高く、安価に太陽電池パネルを供給できる接続装置に関する。 The present invention relates to a solar cell element connecting apparatus for connecting solar cell elements with tab lead wires, and in particular, it is possible to quickly bond tab lead wires to solar cell elements, and the productivity and energy efficiency are high and inexpensive. The present invention relates to a connection device capable of supplying a solar cell panel.
　太陽電池は、無尽蔵で環境汚染のないエネルギーとして存在する太陽光を直接電気エネルギーに変換する発電システムで、住宅用から大型発電分野へとその使用範囲を急速に拡大しつつある。 Solar cells are power generation systems that directly convert sunlight, which is inexhaustible and free from environmental pollution, into electrical energy, and the range of use is rapidly expanding from residential to large-scale power generation.
　特に住宅用や大型発電用の太陽電池の内、結晶系は、太陽電池素子の製造工程を経た後、複数の太陽電池素子をタブリード線によって電気的に接続してモジュールを形成する工程と、該モジュールを透明なカバー材と保護材との間に挟んでラミネートする工程を経て製造されている。また、各種の太陽電池の中で、特に非晶質シリコン系太陽電池や結晶シリコン系太陽電池等は、大面積で製造でき、製造コストも安価であることから、これまでに鋭意研究され、ここ数年の間にモジュール化形成並びにシステム化形成の生産技術の開発も一層促進され、３ＫＷ程度の家庭用小型発電装置から数百ＫＷの大型発電装置が実用化されるまでに至っている。 In particular, among solar cells for residential use and large-scale power generation, the crystal system is a step of forming a module by electrically connecting a plurality of solar cell elements with tab lead wires after passing through the manufacturing process of the solar cell element, It is manufactured through a process of laminating a module between a transparent cover material and a protective material. Among various types of solar cells, especially amorphous silicon solar cells and crystalline silicon solar cells can be manufactured in a large area and are inexpensive to manufacture. The development of production technology for modularization and systemization has been further promoted over several years, leading to the practical application of small power generators of about 3 KW to large power generators of several hundred KW.
　一方、このような背景のもと、市場の需要増と相まって、市場からは大幅なコストダウンの要請が強くなっている。この要請に応える手段としては、タブリード線を太陽電池素子に接着する際の高速化が考えられ、そのために昇温性能に優れた誘導加熱方式の利用が模索されている。このような、誘導加熱による接続装置としては、特許文献１に記載されたものが挙げられる。 On the other hand, with such a background, coupled with an increase in market demand, there is a strong demand for cost reduction from the market. As means for meeting this demand, it is conceivable to increase the speed when the tab lead wire is bonded to the solar cell element. For this reason, the use of an induction heating method with excellent temperature rise performance is being sought. As such a connection device by induction heating, the one described in Patent Document 1 can be cited.
特開２００９－２２６４８２号公報JP 2009-226482 A
　しかしながら、引用文献１に記載の装置では、必要な部分に磁力線が集中しにくいので必要な加熱を行うために大きな電力が必要となり、エネルギーコストが嵩み、太陽電池パネルを安価に供給できないという欠点がある。 However, in the apparatus described in the cited document 1, since the magnetic lines of force are difficult to concentrate on the necessary portions, a large amount of electric power is required to perform the necessary heating, the energy cost increases, and the solar cell panel cannot be supplied at a low cost. There is.
　本発明は上記従来技術の問題点を解消し、接着速度が速く、生産性及びエネルギー効率が高く、太陽電池パネルを安価に供給することができる接続装置を提供することを目的とする。 An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a connecting device that can supply a solar cell panel at a low cost with a high bonding speed, high productivity and high energy efficiency.
　上記目的を達成するために、本発明の特徴の第１は、タブリード線で太陽電池素子を接続するための太陽電池素子の接続装置において、タブリード線を太陽電池素子に加熱接着するための加熱手段が、タブリード線の延伸方向に長い略長方形状の誘導加熱コイルであり、誘導加熱コイル内には軟磁性材料からなる磁心が挿通されている太陽電池素子の接続装置を内容とする。 In order to achieve the above object, according to a first aspect of the present invention, there is provided a solar cell element connecting device for connecting solar cell elements with tab lead wires, and heating means for heating and bonding the tab lead wires to the solar cell elements. However, it is a substantially rectangular induction heating coil that is long in the extending direction of the tab lead wire, and includes a solar cell element connection device in which a magnetic core made of a soft magnetic material is inserted in the induction heating coil.
　本発明の特徴の第２は、磁心の延伸方向の長さが、太陽電池素子の延伸方向の長さと略等しい上記の接続装置を内容とする。 The second feature of the present invention includes the above connection device in which the length of the magnetic core in the extending direction is substantially equal to the length of the solar cell element in the extending direction.
　本発明の特徴の第３は、更に、タブリード線を太陽電池素子に押し付ける押さえピンがタブリード線の延伸方向に列設されている上記の接続装置を内容とする。 The third feature of the present invention further includes the above connection device in which pressing pins for pressing the tab lead wire against the solar cell element are arranged in the extending direction of the tab lead wire.
　本発明の特徴の第４は、前記磁心が複数の小磁心にからなり、誘導加熱コイル内には前記押さえピンと前記小磁心が交互に配置されている上記の接続装置を内容とする。 The fourth feature of the present invention includes the above connection device in which the magnetic core is composed of a plurality of small magnetic cores, and the pressing pins and the small magnetic cores are alternately arranged in the induction heating coil.
　本発明の特徴の第５は、少なくとも一部の小磁心が、他の小磁心とは独立に高さを変更可能である上記の太陽電池素子の接続装置を内容とする。 The fifth feature of the present invention includes the above solar cell element connection device in which at least some of the small magnetic cores can be changed in height independently of other small magnetic cores.
　本発明の特徴の第６は、押さえピンが誘導加熱されないセラミックス製である上記の接続装置を内容とする。 The sixth feature of the present invention includes the above connection device in which the pressing pin is made of ceramics that is not induction-heated.
　本発明の特徴の第７は、誘導加熱コイルと磁心の間に絶縁体からなる薄板を介在させる上記の接続装置を内容とする。 The seventh feature of the present invention includes the above connection device in which a thin plate made of an insulator is interposed between the induction heating coil and the magnetic core.
　本発明による太陽電池素子の接続装置は、タブリード線を太陽電池素子に加熱接着するための加熱手段が、タブリード線の延伸方向（以後、単に延伸方向と称することがある）に長い略長方形状の誘導加熱コイルであり、誘導加熱コイル内には軟磁性材料からなる磁心が挿通されているので、磁力線は効率よく利用され、タブリード線を急速に加熱できるため、接続のための時間が短くなり、生産性が向上して太陽電池の製造コストを下げることができる。 In the solar cell element connection device according to the present invention, the heating means for heat-bonding the tab lead wire to the solar cell element has a substantially rectangular shape that is long in the extending direction of the tab lead wire (hereinafter sometimes simply referred to as the extending direction). It is an induction heating coil, and since a magnetic core made of a soft magnetic material is inserted in the induction heating coil, the magnetic field lines are used efficiently, and the tab lead wire can be heated rapidly, so the time for connection is shortened, Productivity improves and the manufacturing cost of a solar cell can be reduced.
　磁心の延伸方向の長さを太陽電池素子の延伸方向の長さと略等しくすれば、太陽電池素子の電極列の上にタブリード線を一度に接着できるので作業効率が向上する。 If the length in the extending direction of the magnetic core is made substantially equal to the length in the extending direction of the solar cell element, the tab lead wire can be bonded onto the electrode array of the solar cell element at a time, so that the work efficiency is improved.
　押さえピンを太陽電池素子の延伸方向に列設し、複数の小磁心を設け、押さえピンと磁心を交互に配置するように構成すれば、半田が溶融した状態で押さえピンにより太陽電池素子とタブリード線が圧着されるので一層接着し易くなり、溶融した半田の量が少なくても好適に接続できるとともに、半田の溶融及び接続に要する時間が少なくて済み、太陽電池の製造コストを低減できる。 If the pressing pins are arranged in the extending direction of the solar cell elements, a plurality of small magnetic cores are provided, and the pressing pins and the magnetic cores are alternately arranged, the solar cell elements and the tab lead wires are held by the pressing pins in a molten state. Since it is pressure-bonded, it can be more easily bonded, and can be suitably connected even if the amount of melted solder is small, and the time required for melting and connecting the solder can be reduced, and the manufacturing cost of the solar cell can be reduced.
　少なくとも一部の小磁心を、他の小磁心とは独立に高さを変更可能とすれば、強く加熱したい部分で小磁心を降下させ、加熱を弱くしたい部分で小磁心を上昇させることにより、きめ細かい温度管理をすることができる。 If the height of at least some of the small magnetic cores can be changed independently of the other small magnetic cores, the small magnetic core is lowered at the portion where heating is strongly desired and the small magnetic core is raised at the portion where heating is weakened. Fine temperature control is possible.
　押さえピンを誘導加熱されないセラミックス製にすれば、押さえピンが発熱しなくなり、当該部分の半田、特に、タブリード線の上側に付着している半田は溶融し難くなるので、押さえピンとタブリード線が接着し難くなり、押さえピンを外すときにタブリード線が太陽電池素子から引き剥がされるようなトラブルを防止できる。 If the presser pin is made of ceramic that is not induction-heated, the presser pin will not generate heat, and the solder on that part, especially the solder attached to the upper side of the tab lead wire will be difficult to melt. This makes it difficult to prevent a trouble that the tab lead wire is peeled off from the solar cell element when the pressing pin is removed.
　誘導加熱コイルと磁心の間に絶縁体を介在させれば、表層電流によるショートを防ぐことができ、エネルギー効率の悪化を抑制することができる。 If an insulator is interposed between the induction heating coil and the magnetic core, a short circuit due to a surface current can be prevented, and deterioration of energy efficiency can be suppressed.
図１は本発明の太陽電池素子の接続装置の概略図である。FIG. 1 is a schematic view of a solar cell element connection device of the present invention. 図２（ａ）は本発明で使用される接着ヘッドの一例を示す概略断面図であり、（ｂ）は（ａ）の接着ヘッドを通常の太陽電池素子に対して使用した場合を示す概略図であり、（ｃ）は本発明で使用される接着ヘッドの他の例を示す概略断面図であり、（ｄ）は（ｃ）の接着ヘッドを所謂裏面電極型の太陽電池素子に対して使用した場合を示す概略説明図である。FIG. 2A is a schematic sectional view showing an example of an adhesive head used in the present invention, and FIG. 2B is a schematic diagram showing a case where the adhesive head of FIG. (C) is a schematic cross-sectional view showing another example of an adhesive head used in the present invention, and (d) is an adhesive head of (c) used for a so-called back electrode type solar cell element. It is a schematic explanatory drawing which shows the case where it did. 図３（ａ）は本発明で使用される接着ヘッドの一例を示す正面図であり、（ｂ）は（ａ）のＡ－Ａ断面図である。FIG. 3A is a front view showing an example of an adhesive head used in the present invention, and FIG. 3B is a cross-sectional view taken along the line AA in FIG. 図４（ａ）は本発明で使用される接着ヘッドの更に他の例を示す正面図であり、（ｂ）は（ａ）のＢ－Ｂ断面図である。FIG. 4A is a front view showing still another example of the bonding head used in the present invention, and FIG. 4B is a sectional view taken along the line BB in FIG. 図５（ａ）は本発明で使用される接着ヘッドの更に他の例を示す正面図であり、（ｂ）は（ａ）のＣ－Ｃ断面図である。FIG. 5A is a front view showing still another example of the bonding head used in the present invention, and FIG. 5B is a sectional view taken along the line CC in FIG. 図６（ａ）は本発明で使用される接着ヘッドの更に他の例を示す正面図であり、（ｂ）は（ａ）のＤ－Ｄ断面図である。FIG. 6A is a front view showing still another example of the bonding head used in the present invention, and FIG. 6B is a DD cross-sectional view of FIG. 図７（ａ）は本発明で使用される接着ヘッドの更に他の例を示す正面図であり、（ｂ）は（ａ）のＥ－Ｅ断面図である。FIG. 7A is a front view showing still another example of the bonding head used in the present invention, and FIG. 7B is an EE cross-sectional view of FIG. 図８（ａ）は図７の例で使用する小磁心の概略断面図であり、（ｂ）はその平面図である。FIG. 8A is a schematic sectional view of a small magnetic core used in the example of FIG. 7, and FIG. 8B is a plan view thereof. 図９は小磁心を昇降させる構造の別例を示す概略断面図であり、（ａ）は小磁心を降下させた状態を示し、（ｂ）は小磁心を上昇させた状態を示す。FIG. 9 is a schematic cross-sectional view showing another example of a structure for raising and lowering a small magnetic core. FIG. 9A shows a state where the small magnetic core is lowered, and FIG. 9B shows a state where the small magnetic core is raised. 図１０は図７の誘導加熱コイルの使用例を示す概略説明図であり、（ａ）は小さな太陽電池素子にタブリード線を加熱接着する場合、（ｂ）は太陽電池素子が誘導加熱コイルに対して傾いた場合、（ｃ）は太陽電池素子の端部が他の部分より高温になった場合の対処を示す。FIG. 10 is a schematic explanatory view showing an example of use of the induction heating coil of FIG. 7, where (a) shows a case where a tab lead wire is heated and bonded to a small solar cell element, and (b) shows a case where the solar cell element is against the induction heating coil. (C) shows a countermeasure when the end portion of the solar cell element becomes hotter than the other portions. 図１１は図４乃至図７の例で使用した押さえピンの概略断面図である。FIG. 11 is a schematic cross-sectional view of the pressing pin used in the examples of FIGS.
　本発明の太陽電池素子の接続装置１は、タブリード線Ｔで太陽電池素子Ｓを接続するための太陽電池素子の接続装置１において、図１に示したように、タブリード線Ｔを太陽電池素子Ｓに加熱接着するための加熱手段が、延伸方向に長い略長方形状の誘導加熱コイル３であり、誘導加熱コイル３内には軟磁性材料からなる磁心４が挿通されていることを特徴とする。なお、本明細書において誘導加熱コイル３に磁心４を挿通した構造を接着ヘッド２と称することがある。 The solar cell element connection device 1 of the present invention is a solar cell element connection device 1 for connecting solar cell elements S with tab lead wires T. As shown in FIG. The heating means for heat-bonding to each other is an induction heating coil 3 having a substantially rectangular shape that is long in the extending direction, and a magnetic core 4 made of a soft magnetic material is inserted into the induction heating coil 3. In the present specification, a structure in which the magnetic core 4 is inserted through the induction heating coil 3 may be referred to as an adhesion head 2.
　本発明に使用されるタブリード線Ｔは通常のものでよく、例えば、市販の標準品（平角状で、幅２ｍｍ程度、厚み０．１６ｍｍ程度の銅箔の両面に厚み４０μｍ程度の半田がコーティングされている）を用いることができる。また、半田の代わりに導電性接着剤を塗布して用いてもよい。
　或いは、タブリード線Ｔとして半田等が塗布されていない銅箔テープを用い、太陽電池素子Ｓの電極Ｅ上に導電性接着剤を塗布してから、その上に銅箔テープからなるタブリード線Ｔを配置し、接着してもよい。この場合、接着剤を塗布する手段は定法でよいが、例えばテープ状の剥離紙に接着剤を塗布してから、この接着剤付き剥離紙を電極Ｅの上に貼り付け、その後に剥離紙のみを取り除く方法が例示できる。 The tab lead wire T used in the present invention may be a normal one. For example, a commercially available standard product (flat, about 2 mm wide and about 0.16 mm thick copper foil is coated on both sides with about 40 μm thick solder. Can be used). Moreover, you may apply | coat and use a conductive adhesive instead of solder.
Alternatively, a copper foil tape to which solder or the like is not applied is used as the tab lead wire T, and a conductive adhesive is applied on the electrode E of the solar cell element S, and then the tab lead wire T made of the copper foil tape is applied thereon. It may be placed and glued. In this case, the means for applying the adhesive may be a regular method. For example, after applying the adhesive to a tape-like release paper, the adhesive-attached release paper is pasted on the electrode E, and then only the release paper is applied. The method of removing can be illustrated.
　なお、本発明において、加熱接着とは、タブリード線Ｔの周りに塗布された半田を溶融させて、タブリード線Ｔを太陽電池素子Ｓに半田付けしたり、タブリード線Ｔか太陽電池素子Ｓのいずれかに塗布された導電性接着剤を熱硬化させて接着するなど、太陽電池素子Ｓの上に配置されたタブリード線Ｔを加熱することにより当該太陽電池素子Ｓとタブリード線Ｔを接着することをいう。 In the present invention, the heat bonding means that the solder applied around the tab lead wire T is melted and the tab lead wire T is soldered to the solar cell element S, or either the tab lead wire T or the solar cell element S is used. Adhering the solar cell element S and the tab lead wire T by heating the tab lead wire T disposed on the solar cell element S, such as thermosetting and adhering the conductive adhesive applied to the crab Say.
　図１に示したように、本発明の太陽電池素子Ｓの接続装置は、太陽電池素子の供給手段８により供給された太陽電池素子Ｓを、タブリード線の供給手段７により供給されたタブリード線Ｔで接続するための装置に関する。この種の接続装置は、最低限、太陽電池素子Ｓ及びタブリード線Ｔを適当な位置に移動させるための移動手段と、タブリード線Ｔを太陽電池素子Ｓに加熱接着するための加熱手段を備えており、その他、従来の接続装置で使用されているような、半田の溶融や冷却固化を早めるための予熱手段や冷却手段、急激な温度変化を防ぎ熱ストレスを緩和して太陽電池素子の割れや欠けを防ぐための恒温手段、太陽電池素子の反りを矯正するための矯正手段などを付加することができる。 As shown in FIG. 1, the connection device for solar cell elements S of the present invention includes a solar cell element S supplied by a solar cell element supply means 8 and a tab lead wire T supplied by a tab lead wire supply means 7. It is related with the device for connecting with. This type of connecting device includes at least a moving means for moving the solar cell element S and the tab lead wire T to an appropriate position and a heating means for heating and bonding the tab lead wire T to the solar cell element S. In addition, preheating means and cooling means for accelerating the melting and cooling and solidification of solder as used in conventional connection devices, cracking of solar cell elements by preventing rapid temperature changes and reducing thermal stress A constant temperature means for preventing chipping, a correcting means for correcting warpage of the solar cell element, and the like can be added.
　なお、太陽電池素子の供給手段、タブリード線の供給手段、予熱手段、冷却手段、恒温手段、矯正手段、その他製造コストを低下させたり品質を向上させたり歩留まりを改善するための手段は、本発明の太陽電池素子の接続装置と一体に製造してもよいし、別体に製造して本発明の接続装置と組み合わせて使用してもよい。 The solar cell element supply means, the tab lead wire supply means, the preheating means, the cooling means, the constant temperature means, the correction means, and other means for reducing the manufacturing cost, improving the quality, and improving the yield are described in the present invention. The solar cell element connection device may be manufactured integrally, or may be manufactured separately and used in combination with the connection device of the present invention.
　図１に示した例では、支持台６に移動手段９と、誘導加熱コイル３及び磁心４を有する接着ヘッド２とが取り付けられているとともに、太陽電池素子の供給手段８とタブリード線の供給手段７が設けられている。
　そして、太陽電池素子の供給手段８及びタブリード線の供給手段７により供給された太陽電池素子Ｓ及びタブリード線Ｔは、移動手段９によって適当な位置に配置され、接着ヘッド２によりタブリード線Ｔが太陽電池素子Ｓに接着されるように構成されている。
　また、接着ヘッド２は太陽電池素子Ｓ及びタブリード線Ｔが適当な位置に配置されるまでの間は、レール６ａに沿って上昇して待機しており、太陽電池素子Ｓ及びタブリード線Ｔが適当な位置に配置されてから降下して当該太陽電池素子Ｓにタブリード線Ｔを接着するようになっている。 In the example shown in FIG. 1, a moving means 9 and an adhesive head 2 having an induction heating coil 3 and a magnetic core 4 are attached to a support base 6, and a solar cell element supply means 8 and a tab lead wire supply means. 7 is provided.
The solar cell element S and the tab lead wire T supplied by the solar cell element supply means 8 and the tab lead wire supply means 7 are arranged at appropriate positions by the moving means 9, and the tab lead wire T is moved by the bonding head 2 to the sun. It is configured to be bonded to the battery element S.
Further, the adhesive head 2 rises along the rail 6a and waits until the solar cell element S and the tab lead wire T are arranged at appropriate positions, and the solar cell element S and the tab lead wire T are appropriate. The tab lead wire T is attached to the solar cell element S by being lowered after being arranged at a proper position.
　本発明において、タブリード線Ｔを太陽電池素子Ｓに加熱接着するための加熱手段は誘導加熱コイル３である。この誘導加熱コイル３は図示しない高周波電源と接続されており、この高周波電源で発生する高周波電流を誘導加熱コイル３に流すことにより急速な磁束の変化を起こし、これにより電磁誘導の原理でタブリード線Ｔを加熱する。
　なお、高周波電流を誘導加熱コイル３に流すことにより、誘導加熱コイル３は自己発熱するが、誘導加熱コイル３を形成する導線を中空管状にして、導線の中に冷却水を通すことにより、自己発熱による熱を冷却するように構成してもよい。 In the present invention, the heating means for heating and bonding the tab lead wire T to the solar cell element S is the induction heating coil 3. The induction heating coil 3 is connected to a high-frequency power source (not shown), and a rapid magnetic flux change is caused by flowing a high-frequency current generated by the high-frequency power source to the induction heating coil 3, thereby causing a tab lead wire based on the principle of electromagnetic induction. T is heated.
The induction heating coil 3 self-heats when a high-frequency current is passed through the induction heating coil 3, but the self-heating of the induction heating coil 3 is made into a hollow tube, and cooling water is passed through the lead wire so You may comprise so that the heat by heat_generation | fever may be cooled.
　本発明における誘導加熱コイル３は、太陽電池素子Ｓの上に配置されるタブリード線Ｔを加熱するために設けられる。従って、タブリード線Ｔを一度に加熱できるように、誘導加熱コイル３はタブリード線Ｔの延伸方向に長い略長方形状とされる。 The induction heating coil 3 in the present invention is provided for heating the tab lead wire T disposed on the solar cell element S. Therefore, the induction heating coil 3 has a substantially rectangular shape that is long in the extending direction of the tab lead wire T so that the tab lead wire T can be heated at a time.
　誘導加熱コイル３の形状については、長辺側についてはタブリード線Ｔ全体を均一に加熱できるように、平行な直線状にする必要があるが、短辺側についてはその必要がなく、角の部分にアールを設けたり、短辺側全体を半円形にすることもできる。即ち、短辺側の形状に関わらず、長辺側が平行な直線状であれば、本発明でいう略長方形状に含まれる。 As for the shape of the induction heating coil 3, the long side needs to be a straight line so that the entire tab lead wire T can be uniformly heated. Can be provided, or the entire short side can be semicircular. That is, regardless of the shape on the short side, a straight line with a parallel long side is included in the substantially rectangular shape referred to in the present invention.
　誘導加熱コイル３の幅（延伸方向と直交する向きの長さ）については、図２（ａ）及び（ｂ）に示すように、誘導加熱コイル３の中空部分が電極Ｅを覆う程度、又はタブリード線Ｔの幅と同程度とするのが好ましい。但し、近年使用され始めた裏面電極型の太陽電池素子Ｓのように、電極Ｅの列が２本以上近接して設けられているような場合は、図２（ｃ）及び（ｄ）に示すように、２本の電極Ｅの列、又は２本のタブリード線Ｔをまとめて覆う程度の幅としてもよい。 The width of the induction heating coil 3 (the length in the direction perpendicular to the extending direction) is such that the hollow portion of the induction heating coil 3 covers the electrode E, as shown in FIGS. The width of the line T is preferably about the same. However, in the case where two or more rows of electrodes E are provided close to each other like the back electrode type solar cell element S which has started to be used in recent years, it is shown in FIGS. 2 (c) and 2 (d). As described above, the width may be such that the row of the two electrodes E or the two tab lead wires T are collectively covered.
　誘導加熱コイル３の巻数については、タブリード線Ｔの表面に付着している半田を適切な温度に加熱できる程度とすればよい。図２乃至図７には、２回巻回された誘導加熱コイル３が記載されているが、これに限定されず、１～３回程度巻回させることにより十分な温度が得られる。 The number of turns of the induction heating coil 3 may be such that the solder adhering to the surface of the tab lead wire T can be heated to an appropriate temperature. Although FIG. 2 to FIG. 7 show the induction heating coil 3 wound twice, it is not limited to this, and a sufficient temperature can be obtained by winding it about 1 to 3 times.
　誘電加熱に用いる高周波電流の周波数は、タブリード線Ｔを太陽電池素子Ｓに加熱接着するのに適切な温度に加熱できる程度とすれはよく、具体的には１５０～４００ｋＨｚ程度が適当である。 The frequency of the high-frequency current used for the dielectric heating may be such that the tab lead wire T can be heated to an appropriate temperature for heat-bonding the solar cell element S to the solar cell element S. Specifically, about 150 to 400 kHz is appropriate.
　本発明においては、誘導加熱コイル３には磁心４が挿通される。磁心４は誘導加熱コイル３から発せられる磁力線をタブリード線Ｔに効率よく作用させるためのものであるので、透磁性が高いことが必要であり、従って、本発明では軟磁性材料からなる磁心４が使用される。具体的な材質としては、透磁性に優れた軟磁性材料であれば特に限定されず、珪素鋼のような導電性材料でもよいが、抵抗率が高くて１５０ｋＨｚ以上の高周波を利用しても比較的発熱しにくいフェライトが好ましい。好適なフェライトの例としては、マンガン亜鉛フェライト、ニッケル亜鉛フェライト、銅亜鉛フェライト等が挙げられる。 In the present invention, the magnetic core 4 is inserted into the induction heating coil 3. Since the magnetic core 4 is for efficiently causing the magnetic force lines generated from the induction heating coil 3 to act on the tab lead wire T, it is necessary that the magnetic core 4 be made of a soft magnetic material. used. The specific material is not particularly limited as long as it is a soft magnetic material excellent in magnetic permeability, and a conductive material such as silicon steel may be used. Ferrite that does not easily generate heat is preferable. Examples of suitable ferrites include manganese zinc ferrite, nickel zinc ferrite, copper zinc ferrite and the like.
　磁心４の材質として導電性を有する物質を使用する場合には、誘導加熱コイル３と磁心４の間に絶縁体を介在させる必要がある。使用する絶縁体としては特に限定されないが、シリコン樹脂やポリイミド樹脂が例示できる。また、誘導加熱コイル３の周りに絶縁テープを巻きつけてもよい。 When using a conductive material as the material of the magnetic core 4, it is necessary to interpose an insulator between the induction heating coil 3 and the magnetic core 4. Although it does not specifically limit as an insulator to be used, A silicon resin and a polyimide resin can be illustrated. Further, an insulating tape may be wound around the induction heating coil 3.
　特に、誘導加熱コイル３を形成する導線を中空管状にして、導線の中に冷却水を通す場合、熱伝導率の高い絶縁体を使用することにより、磁心４を同時に冷却することができるので好ましい。このような熱伝導率の高い絶縁体としては、セラミックスフィラーをシリコーンに高充填した材料、例えば、電気化学工業株式会社製、商品名：デンカ放熱シート等が例示できる。 In particular, when the lead wire forming the induction heating coil 3 is made into a hollow tubular shape and cooling water is passed through the lead wire, it is preferable because the magnetic core 4 can be simultaneously cooled by using an insulator having high thermal conductivity. . As an insulator having such a high thermal conductivity, a material in which a ceramic filler is highly filled in silicone, for example, trade name: DENKA radiating sheet manufactured by Denki Kagaku Kogyo Co., Ltd. can be exemplified.
　磁心４の形状は、磁力線をタブリード線Ｔに効率よく作用させることができる形状であれば特に限定されないが、例えば図２（ａ）（ｂ）及び図３に示したような、長さが太陽電池素子Ｓの延伸方向の長さと略等しく、幅がタブリード線Ｔの幅と略等しく、高さが誘導加熱コイル３を所定回数巻回できる程度のものが例示できる。
　なお、図２（ａ）（ｂ）及び図３に記載された磁心４のように、磁心の延伸方向の長さを太陽電池素子Ｓの延伸方向の長さと略等しくすれば、太陽電池素子Ｓの電極Ｅの上のタブリード線Ｔを一度に加熱溶融できるので、作業効率が向上する。 The shape of the magnetic core 4 is not particularly limited as long as the magnetic force lines can be efficiently applied to the tab lead wires T. For example, the length of the magnetic core 4 as shown in FIGS. 2A and 2B and FIG. For example, the battery element S is substantially equal to the length in the extending direction, the width is approximately equal to the width of the tab lead wire T, and the height is such that the induction heating coil 3 can be wound a predetermined number of times.
If the length in the extending direction of the magnetic core is substantially equal to the length in the extending direction of the solar cell element S as in the magnetic core 4 described in FIGS. Since the tab lead wire T on the electrode E can be heated and melted at a time, the working efficiency is improved.
　また、図４に示すように、長さが太陽電池素子Ｓの延伸方向の長さと略等しく、幅がタブリード線Ｔの幅と略等しく、高さが誘導加熱コイル３を所定回数巻回できる程度の大きさで、押さえピン５を挿通するための挿通孔４ａが延伸方向に直線状に列設された磁心４を用いることができる。この構造は、押さえピン５を用いてタブリード線Ｔを押さえながら接続する場合に好適である。
　このような磁心４を用いると、押さえピン５を設けるための磁心４の隙間の大きさを最小限に抑えることにより、押さえピン５付近の温度低下を抑えることができ、タブリード線を均一に加熱接着することができる。 Further, as shown in FIG. 4, the length is approximately equal to the length of the solar cell element S in the extending direction, the width is approximately equal to the width of the tab lead wire T, and the height is such that the induction heating coil 3 can be wound a predetermined number of times. It is possible to use a magnetic core 4 in which insertion holes 4a for inserting the pressing pins 5 are linearly arranged in the extending direction. This structure is suitable when the tab lead wire T is pressed using the pressing pin 5 and connected.
When such a magnetic core 4 is used, a temperature drop in the vicinity of the pressing pin 5 can be suppressed by minimizing the size of the gap of the magnetic core 4 for providing the pressing pin 5, and the tab lead wire is heated uniformly. Can be glued.
　磁心４の他の例としては、図５（ａ）（ｂ）に示したような、複数の小磁心４ｓを複数列設する構造が例示できる。詳しくは、従来の太陽電池素子の接続装置と同様に、タブリード線Ｔの延伸方向に押さえピン５が列設されている場合において、この押さえピン５の列を囲むように誘導加熱コイル３を設け、各押さえピン５の間及び必要に応じて押さえピン５の列の一端又は両端に小磁心４ｓを１個づつ配置、即ち、押さえピン５と小磁心４ｓが交互に配置される構造とすることができる。尚、図５では押さえピン５の両端に小磁心４ｓを設けた例を示す。
　このようにすれば、銅箔の周りに半田を付着させた通常のタブリード線Ｔを使用する場合は、半田が溶融した状態で太陽電池素子Ｓとタブリード線Ｔが押さえピンにより圧着されるので一層接着し易くなり、加熱溶融した液状の半田の量が少なくても好適に接続でき、半田の溶融及び接続に要する時間が短くて済むので生産性が向上し、太陽電池パネルの製造コストを低減することができる。また、押さえピン５により小磁心４ｓとタブリード線Ｔの間隔を保持できるので、溶融した半田が小磁心４ｓの下面に付着して小磁心４ｓが汚れるようなこともなく、メンテナンスも容易である。また、導電性接着剤を使用する場合でも、温度が比較的低い状態でタブリード線Ｔを接着できるようになる。
　なお、図５に示した例では両端が小磁心４ｓとなっているが、図６に示すように両端を押さえピン５とすれば、加熱接着の際にタブリード線Ｔの端部が浮き上がらず、好適にタブリード線Ｔを接着することができるという効果が得られる。 As another example of the magnetic core 4, a structure in which a plurality of small magnetic cores 4s are arranged in a plurality of rows as shown in FIGS. More specifically, in the case where the pressing pins 5 are arranged in the extending direction of the tab lead wire T, the induction heating coil 3 is provided so as to surround the row of the pressing pins 5 as in the conventional solar cell element connecting device. In addition, one small magnetic core 4s is arranged between each holding pin 5 and one end or both ends of the row of holding pins 5 as necessary, that is, the holding pins 5 and the small magnetic cores 4s are alternately arranged. Can do. FIG. 5 shows an example in which small magnetic cores 4 s are provided at both ends of the holding pin 5.
In this way, when using a normal tab lead wire T in which the solder is attached around the copper foil, the solar cell element S and the tab lead wire T are pressure-bonded by the pressing pin in a state where the solder is melted. It becomes easy to bond and can be suitably connected even if the amount of heated and melted liquid solder is small, and the time required for melting and connecting the solder can be shortened, so that the productivity is improved and the manufacturing cost of the solar cell panel is reduced. be able to. Moreover, since the space | interval of the small magnetic core 4s and the tab lead wire T can be hold | maintained with the holding | suppressing pin 5, the molten solder does not adhere to the lower surface of the small magnetic core 4s, and the small magnetic core 4s becomes dirty, and maintenance is also easy. Even when a conductive adhesive is used, the tab lead wire T can be bonded at a relatively low temperature.
In the example shown in FIG. 5, both ends are small magnetic cores 4 s. However, if both ends are set as pressing pins 5 as shown in FIG. 6, the end of the tab lead wire T does not float at the time of heat bonding, The effect that the tab lead wire T can be suitably bonded is obtained.
　押さえピン５と交互に配置する場合、小磁心４ｓの形状は、誘導加熱コイル内に押さえピン５と小磁心４ｓを交互に配置可能である限り、特に限定されないが、四角柱状、円柱状、楕円柱状等が誘導加熱コイル内に挿通しやすく、押さえピン５と交互に配置するのが容易なので、好ましい。 When alternately arranged with the holding pins 5, the shape of the small magnetic core 4 s is not particularly limited as long as the holding pins 5 and the small magnetic core 4 s can be alternately arranged in the induction heating coil. A columnar shape or the like is preferable because it can be easily inserted into the induction heating coil and easily arranged alternately with the pressing pins 5.
　なお、図３や図５に示すように、磁心４及び小磁心４ｓはこれらの下端を誘導加熱コイル３の下面から突出させてもよいが、図４や図６に示すように、突出しないように設けたほうが効率がよいので好ましい。 As shown in FIGS. 3 and 5, the magnetic core 4 and the small magnetic core 4s may have their lower ends projecting from the lower surface of the induction heating coil 3. However, as shown in FIGS. Since it is more efficient, it is preferable to provide it.
　また、本発明においては、図７に矢示するように、少なくとも一部の小磁心を、他の小磁心とは独立に高さを変更可能とすることもできる。
　小磁心４ｓの高さを変更するための構造は特に限定されないが、例えば、図８に示すような、内部に雌ネジが刻設された円筒状の鞘部４ｓ１と、外周に雄ネジが刻設され、頂部にドライバー等で回すための凹凸（図８に示した例ではプラスドライバー用の十字状の窪み）が設けられた円柱状の芯部４ｓ２からなるものが例示できる。或いは、ドライバー等で芯部４ｓ２を回転させる代わりにモーター等を芯部４ｓ２に固着して機械的に回転させてもよいし、鞘部４ｓ１の代わりに隣接する押さえピン５の表面や誘導加熱コイル３の内面に雌ネジを刻設してもよい。このような構成にすれば、小磁心４ｓの高さを無段階に調節することにより、タブリード線Ｔの加熱を細かく調節することができる。 In the present invention, as shown by an arrow in FIG. 7, the height of at least some of the small magnetic cores can be changed independently of other small magnetic cores.
The structure for changing the height of the small magnetic core 4s is not particularly limited. For example, as shown in FIG. 8, a cylindrical sheath portion 4s1 in which an internal thread is engraved and an external thread is engraved on the outer periphery. An example is a cylindrical core portion 4s2 that is provided and provided with concavities and convexities (in the example shown in FIG. 8, a cross-shaped depression for a plus driver) provided on the top. Alternatively, instead of rotating the core 4s2 with a screwdriver or the like, a motor or the like may be fixed to the core 4s2 and mechanically rotated, or the surface of the adjacent pressing pin 5 or induction heating coil instead of the sheath 4s1 A female screw may be engraved on the inner surface of 3. With such a configuration, the heating of the tab lead wire T can be finely adjusted by adjusting the height of the small magnetic core 4s steplessly.
　小磁心４の高さを変更するためのその他の構成としては、図９に示すような、小磁心４ｓに引き上げロッド４ｂを接続し、必要に応じて引き上げロッド４ｂを引き上げることによって小磁心４ｓを誘導加熱コイル３の中から引き抜き、ストッパー４ｃを引き上げロッド４ｂの突起４ｂ１と係合させて小磁心４ｓの高さを維持する構成が例示できる。このような構成にすれば、小磁心４ｓの高さを容易に変更できるので作業性に優れている。
　なお、上記の例では手動で引き上げロッド４ｂを引き上げるように構成されているが、アクチュエーター等で直接小磁心４を持ち上げてもよい。 As another configuration for changing the height of the small magnetic core 4, as shown in FIG. 9, the pulling rod 4b is connected to the small magnetic core 4s, and the small magnetic core 4s is lifted as necessary. A configuration in which the height of the small magnetic core 4s is maintained by pulling out from the induction heating coil 3 and engaging the stopper 4c with the protrusion 4b1 of the lifting rod 4b can be exemplified. With such a configuration, the height of the small magnetic core 4s can be easily changed, so that workability is excellent.
In the above example, the lifting rod 4b is manually lifted, but the small magnetic core 4 may be lifted directly by an actuator or the like.
　上記のように、小磁心４ｓの高さを他の小磁心とは独立に変更可能とすれば、強く加熱したい部分で小磁心を降下させ、加熱を弱くしたい部分で小磁心を上昇させることにより、きめ細かい温度管理をすることができ、加熱が不要な部分の加熱を抑えたり、加熱が必要な部分を均一に加熱することが可能になる。
　例えば、端部から数個の小磁心４ｓの高さを変更可能にすれば、一つの加熱手段で延伸方向の長さが異なる多種類の太陽電池素子に対応できる。即ち、図１０（ａ）に示したように、延伸方向の長さが短い太陽電池素子Ｓを接続する場合には、タブリード線Ｔを加熱接着する太陽電池素子Ｓ１の上にある小磁心４ｓだけを降下させて、それ以外の小磁心４ｓを上昇させることにより、隣接する太陽電池素子Ｓ２を加熱しないように調節することができる。 As described above, if the height of the small magnetic core 4s can be changed independently of other small magnetic cores, the small magnetic core is lowered at a portion where heating is strongly desired and the small magnetic core is raised at a portion where heating is weakened. Fine temperature control can be performed, and it becomes possible to suppress the heating of the portion that does not require heating or to uniformly heat the portion that requires heating.
For example, if the heights of several small magnetic cores 4 s can be changed from the end portion, it is possible to deal with various types of solar cell elements having different lengths in the stretching direction with one heating means. That is, as shown in FIG. 10 (a), when connecting solar cell elements S having a short length in the extending direction, only the small magnetic core 4s on the solar cell element S1 on which the tab lead wire T is heat-bonded is connected. Can be adjusted so as not to heat the adjacent solar cell element S2 by raising the other small magnetic core 4s.
　また、太陽電池素子が加熱手段に対して傾いた場合でも、傾きに応じて小磁心の高さを微調整可能とすれば、小磁心の高さを調節することにより均一に磁気を作用させることができる。即ち、図１０（ｂ）に示したように、接着ヘッド２と太陽電池素子Ｓが平行でない場合であっても、小磁心４ｓの高さを少しづつ変えて、小磁心４ｓの下端と太陽電池素子Ｓとの距離が一定になるように調整すれば、タブリード線Ｔ及び太陽電池素子Ｓに作用する磁気は均一になり、発熱量も概ね一定になるので、タブリード線Ｔを均一に加熱接着することができる。 Even when the solar cell element is tilted with respect to the heating means, if the height of the small magnetic core can be finely adjusted according to the tilt, the magnetic force can be applied uniformly by adjusting the height of the small magnetic core. Can do. That is, as shown in FIG. 10B, even when the bonding head 2 and the solar cell element S are not parallel, the height of the small magnetic core 4s is changed little by little, and the lower end of the small magnetic core 4s and the solar cell are changed. If the distance to the element S is adjusted to be constant, the magnetic force acting on the tab lead wire T and the solar cell element S becomes uniform, and the amount of heat generation becomes substantially constant, so that the tab lead wire T is uniformly heated and bonded. be able to.
　さらに、太陽電池素子の端部が高温になる現象が生じる場合には、両端部の小磁心の高さを変更可能にすれば、当該両端部に近い小磁心を上昇させることにより温度を均一にすることができる。即ち、太陽電池素子Ｓの端部と小磁心４ｓの位置関係によっては太陽電池素子Ｓの端部がが高温状態になることがあるが、このような場合に、図１０（ｃ）に示すように、太陽電池素子Ｓの端部の上にある小磁心４ｓの高さを高くして、その部分に作用する磁気の量を減らせば、発熱量も概ね一定になるので、タブリード線Ｔを均一に加熱接着することができる。 Furthermore, when a phenomenon occurs in which the end of the solar cell element becomes hot, if the height of the small magnetic cores at both ends can be changed, the temperature can be made uniform by raising the small magnetic cores near the both ends. can do. That is, depending on the positional relationship between the end of the solar cell element S and the small magnetic core 4s, the end of the solar cell element S may be in a high temperature state. In such a case, as shown in FIG. Furthermore, if the height of the small magnetic core 4s on the end of the solar cell element S is increased to reduce the amount of magnetism acting on that portion, the amount of heat generation becomes substantially constant, so the tab lead wire T is made uniform. It can be heated and bonded.
　なお、小磁心４ｓの高さを変更可能にする場合、いずれかの小磁心４ｓを昇降させることによりタブリード線Ｔ及び太陽電池素子の加熱を調節できれば足り、全ての小磁心４ｓの高さを変更可能にする必要はなく、また、高さを変更できる範囲も必要な範囲で温度調節できる程度であれば足り、小磁心４ｓを誘導加熱コイル３から完全に引き抜ける程度とする必要はない。即ち、上記したような、多種類の太陽電池素子Ｓに対応する機能、太陽電池素子Ｓの傾きに対応する機能、太陽電池素子Ｓの端部が高温になる現象に対応する機能は加熱の温度を調節するための所望の機能に過ぎず、上記の機能の全てを備えている必要はない。 In order to change the height of the small magnetic core 4s, it is sufficient to adjust the heating of the tab lead wire T and the solar cell element by raising or lowering any of the small magnetic cores 4s, and the height of all the small magnetic cores 4s is changed. It is not necessary to make it possible, and it is sufficient if the range in which the height can be changed is such that the temperature can be adjusted within the necessary range, and it is not necessary to make the small magnetic core 4 s completely pulled out of the induction heating coil 3. That is, the function corresponding to various kinds of solar cell elements S, the function corresponding to the inclination of the solar cell element S, and the function corresponding to the phenomenon that the end portion of the solar cell element S becomes high are as described above. It is merely a desired function for adjusting the image, and it is not necessary to provide all of the above functions.
　上記のように、誘導加熱コイル３内に配置された押さえピン５を使ってタブリード線Ｔを太陽電池素子Ｓに押し付ける場合、押さえピン５の材質は誘導加熱されない物質とするほうが好ましい。電磁誘導されない物質で押さえピン５を構成すれば、銅箔の周りに半田を付着させた通常のタブリード線Ｔを使用した場合、押さえピン５は発熱せず、当該部分では半田、特に、タブリード線の上側に付着している半田が溶融し難くなるので、押さえピン５とタブリード線Ｔとが接着し難くなり、押さえピン５を外すときにタブリード線Ｔが太陽電池素子Ｓから引き剥がされるようなトラブルを防止できる。
　本発明では、押さえピン５のみならず、押さえピン５を太陽電池素子Ｓ側に付勢する弾性手段５ａやガイド５ｂも誘導加熱されない物質としてもよい。具体的には、押さえピン５及びガイド５ｂを誘導加熱されないセラミックス製にすると共に、弾性手段５ａを耐熱プラスチック製にすることができる。
　なお、押さえピン５の構造は特に限定されないが、図１１に示したような、中空のガイド５ｂの中に押さえピン５を取り付けるとともに、押さえピン５が挿出自在で且つ抜け出し不能となるようにし、弾性手段５ａにより押さえピン５を外側に付勢する構成が例示できる。 As described above, when the tab lead wire T is pressed against the solar cell element S using the pressing pin 5 disposed in the induction heating coil 3, it is preferable that the material of the pressing pin 5 is a substance that is not induction-heated. If the holding pin 5 is made of a material that is not electromagnetically induced, when the normal tab lead wire T with the solder attached around the copper foil is used, the holding pin 5 does not generate heat, and the solder, particularly the tab lead wire, does not generate heat. Since the solder adhering to the upper side of the pin is difficult to melt, the presser pin 5 and the tab lead wire T are difficult to adhere, and the tab lead wire T is peeled off from the solar cell element S when the presser pin 5 is removed. Trouble can be prevented.
In the present invention, not only the pressing pin 5 but also the elastic means 5a and the guide 5b that urge the pressing pin 5 toward the solar cell element S may be a substance that is not induction-heated. Specifically, the pressing pin 5 and the guide 5b can be made of ceramics that are not induction-heated, and the elastic means 5a can be made of heat-resistant plastic.
Although the structure of the pressing pin 5 is not particularly limited, the pressing pin 5 is attached in a hollow guide 5b as shown in FIG. 11, and the pressing pin 5 can be inserted and removed. A configuration in which the pressing pin 5 is urged outward by the elastic means 5a can be exemplified.
　本発明の太陽電池素子の接続装置１で接続される太陽電池素子Ｓは特に限定されず、例えば図２（ｂ）に示すような、表面及び裏面にそれぞれ＋極及び－極が設けられた通常の太陽電池素子は勿論、例えば図２（ｄ）に示すような、電極Ｅが＋極、－極ともに裏面に設けられた、所謂、裏面電極型のものであっても接続できる。その材質としては、従来から使用されている単結晶シリコンや多結晶シリコン等が全て使用できる。 The solar cell element S connected by the solar cell element connection device 1 of the present invention is not particularly limited. For example, as shown in FIG. 2B, a normal electrode having a positive electrode and a negative electrode provided on the front surface and the back surface, respectively. Of course, the solar cell element can be connected even if it is a so-called back electrode type in which the electrode E is provided on the back surface as shown in FIG. As the material, all conventionally used single crystal silicon, polycrystalline silicon, and the like can be used.
　叙上のとおり、本発明の太陽電池素子の接続装置によれば、タブリード線を太陽電池素子に加熱接着するための加熱手段が、タブリード線の延伸方向に長い略長方形状の誘導加熱コイルであり、誘導加熱コイル内には軟磁性材料からなる磁心が挿通されているので、誘導加熱コイルから出る磁力線を有効に利用してタブリード線を迅速に太陽電池素子に接着することができ、これにより生産性が向上し太陽電池の製造コストを下げることができる。
　また、小磁心を押さえピンと交互に設置することにより、半田が溶融した状態で押さえピンにより太陽電池素子とタブリード線を圧着するので一層接着しやすくなり、また小磁心の一部を他の小磁心とは独立して高さを調節可能とすることにより、部分的に加熱したり、太陽電池素子が傾斜している場合にも、該傾斜に応じて小磁心の高さを調節して均一に加熱し接着することが可能である。 As described above, according to the solar cell element connection device of the present invention, the heating means for heating and bonding the tab lead wire to the solar cell element is a substantially rectangular induction heating coil that is long in the extending direction of the tab lead wire. In addition, since a magnetic core made of a soft magnetic material is inserted into the induction heating coil, it is possible to quickly bond the tab lead wire to the solar cell element by effectively using the magnetic field lines coming out of the induction heating coil. And the manufacturing cost of the solar cell can be reduced.
Also, by arranging the small magnetic cores alternately with the holding pins, the solar cell element and the tab lead wire are crimped with the holding pins in a molten state, so that it becomes easier to bond, and a part of the small magnetic cores can be attached to other small magnetic cores. The height can be adjusted independently of each other, so that even when partially heated or the solar cell element is inclined, the height of the small magnetic core is adjusted uniformly according to the inclination. It can be heated and bonded.
　１　太陽電池素子の接続装置
　２　接着ヘッド
　３　誘導加熱コイル
　４　磁心
　４ｓ　小磁心
　４ｓ１　鞘部
　４ｓ２　芯部
　４ａ　挿通孔
　４ｂ　引き上げロッド
　４ｂ１　突起
　４ｃ　ストッパー
　５　押さえピン
　５ａ　弾性手段
　５ｂ　ガイド
　６　支持台
　６ａ　レール
　７　タブリード線の供給手段
　８　太陽電池素子の供給手段
　９　移動手段
　Ｔ　タブリード線
　Ｓ、Ｓ１、Ｓ２　太陽電池素子
　Ｅ　電極 DESCRIPTION OF SYMBOLS 1 Solar cell element connection apparatus 2 Adhesive head 3 Induction heating coil 4 Magnetic core 4s Small magnetic core 4s1 Sheath part 4s2 Core part 4a Insertion hole 4b Lifting rod 4b1 Projection 4c Stopper 5 Holding pin 5a Elastic means 5b Guide 6 Support stand 6a Rail 7 Tab Line supply means 8 Solar cell element supply means 9 Moving means T Tab lead wire S, S1, S2 Solar cell element E Electrode

Claims (7)

  1. 　タブリード線で太陽電池素子を接続するための太陽電池素子の接続装置において、
    　タブリード線を太陽電池素子に加熱接着するための加熱手段が、タブリード線の延伸方向に長い略長方形状の誘導加熱コイルであり、
    　誘導加熱コイル内には軟磁性材料からなる磁心が挿通されていることを特徴とする太陽電池素子の接続装置。     In a solar cell element connection device for connecting solar cell elements with tab lead wires,
    The heating means for heating and bonding the tab lead wire to the solar cell element is a substantially rectangular induction heating coil that is long in the extending direction of the tab lead wire,
    A solar cell element connection device, wherein a magnetic core made of a soft magnetic material is inserted into an induction heating coil.
  2. 　磁心の延伸方向の長さが、太陽電池素子の延伸方向の長さと略等しいことを特徴とする請求項１に記載の太陽電池素子の接続装置。 2. The solar cell element connection device according to claim 1, wherein the length of the magnetic core in the extending direction is substantially equal to the length of the solar cell element in the extending direction.
  3. 　更に、タブリード線を太陽電池素子に押し付ける押さえピンがタブリード線の延伸方向に列設されていることを特徴とする請求項１又は２に記載の太陽電池素子の接続装置。 3. The solar cell element connection device according to claim 1, further comprising pressing pins for pressing the tab lead wires against the solar cell elements arranged in the extending direction of the tab lead wires.
  4. 　前記磁心が複数の小磁心にからなり、
    　誘導加熱コイル内には前記押さえピンと前記小磁心が交互に配置されていることを特徴とする請求項３に記載の太陽電池素子の接続装置。     The magnetic core comprises a plurality of small magnetic cores;
    4. The solar cell element connection device according to claim 3, wherein the pressing pins and the small magnetic cores are alternately arranged in the induction heating coil.
  5. 　少なくとも一部の小磁心が、他の小磁心とは独立に高さを変更可能であることを特徴とする請求項４に記載の太陽電池素子の接続装置。 The solar cell element connection device according to claim 4, wherein the height of at least some of the small magnetic cores can be changed independently of other small magnetic cores.
  6. 　押さえピンが誘導加熱されないセラミックス製であることを特徴とする請求項３乃至５のいずれかに記載の太陽電池素子の接続装置。 6. The solar cell element connection device according to claim 3, wherein the pressing pin is made of ceramics that is not induction-heated.
  7. 　誘導加熱コイルと磁心の間に絶縁体を介在させることを特徴とする請求項１乃至６のいずれかに記載の太陽電池素子の接続装置。 The solar cell element connection device according to any one of claims 1 to 6, wherein an insulator is interposed between the induction heating coil and the magnetic core.
PCT/JP2011/067942 2010-08-06 2011-08-05 Solar cell element connecting apparatus WO2012018110A1 (en)

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