JP2006294646A - Method of attaching terminal box for solar cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of attaching a terminal box for a solar cell in which a working time of attaching a terminal box is short, workability is excellent, reliability after attaching is high, and a working environment is not deteriorated. <P>SOLUTION: A sticking type adhesive Polymer ace-A(HM-50) 34-A of a thickness of 0.3 mm is stuck on the bottom surface of the terminal box 23, and the terminal box 23 is stored. An opening hole 26 is also ensured on the adhesive 34-A, and is punched and processed into the same dimension as that of the terminal box 23. An adhesive 34-B which is the same type and has the same dimension and the same opening hole 26 is stuck on a predetermined position of a metal steel plate 20. In this state, the terminal box 23 having the adhesive 34-A stuck thereon is stuck on the position of the adhesive 34-B so that the opening holes 26 of the both match each other. After two hours elapses after bonding, a two-liquid type silicone resin material is mixed and filled in the terminal box 23, and is cured to perform insulating processing also served as moisture permeation prevention, and a terminal box lid 23c is attached. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for attaching a solar cell terminal box for taking out the output of a solar cell to the outside.

  Conventionally, an insulating substrate such as a glass substrate has been used for a thin film solar cell, but in recent years, research and development of a thin film solar cell using a flexible plastic film or the like as an insulating substrate has been promoted. As a solar cell in which a plurality of solar cell elements formed on the same substrate are connected in series, a photoelectric conversion element made of a thin film semiconductor such as polycrystalline silicon or amorphous silicon (a-Si) on the same substrate, a transparent electrode, and A film substrate type thin film solar cell in which connection electrodes and the like are patterned is known. For example, Patent Document 1 discloses a flexible thin film solar cell (element) using a plastic film as a substrate.

  FIG. 3 is a perspective view showing the structure of the conventional film substrate type thin film solar cell element 10 described above. In FIG. 3, reference numeral 1 denotes a plastic film substrate, 2 denotes an a-Si photoelectric conversion layer, 3 denotes a transparent electrode layer that is a current collecting electrode, and 4 denotes a back electrode layer (lower electrode) formed below the photoelectric conversion layer 2. Layer) 5 is a connection electrode layer (back side electrode of the solar cell element 10) formed on the back surface of the plastic film substrate 1, and 6 is a transparent electrode layer formed in the region of the transparent electrode layer 3 and penetrating the plastic film substrate 1. Current collecting holes (current collecting holes, through-holes) 7 that conduct between the electrode 3 and the connection electrode layer 5 are formed outside the area of the transparent electrode layer 3, penetrate the plastic film substrate 1 and the back surface of the connection electrode layer 5. It is a connection hole (connection hole) that conducts between the electrode layer 4.

As shown in FIG. 3, the solar light incident side of the solar cell element 10 is completely separated into a plurality of unit units (cells) U _n−1 , U _n , U _{n + 1} , U _{n + 2,} etc. The connection electrode layer 5 is also completely separated into a plurality of unit cells E _n−1 , E _n , E _{n + 1 and the} like. Each separating position, for example, the separation position between the unit cell U _n and U _{n + 1} and (cell dividing groove) 8, and the cell dividing grooves 9 between the unit cell E _n and E _{n + 1} of the back side is shifted to each other forming Has been. That is, the transparent electrode layer 3, the photoelectric conversion layer 2, and the back electrode layer 4 formed on the sunlight incident side of the plastic film substrate 1 are separated into a plurality of unit cells _Un etc. by laser scribing the cell dividing grooves 8. Has been. Furthermore, the connection electrode layer 5 formed on the back side of the plastic film substrate 1 is separated into a plurality of unit cells E _n, etc. by laser scribing dividing grooves 9 is shifted the unit cell U _n such a half pitch Yes. As described above, the solar cell element 10 in which a plurality of unit cells are connected in series is configured.

  The conventional film substrate type thin film solar cell element 10 described above can be mass-produced by a continuous forming manufacturing method using a roll-to-roll method utilizing flexibility. The film substrate type thin-film solar cell element 10 is required for a practical solar cell that is thin and lightweight, is excellent in mass productivity, has a low manufacturing cost, and is easy to increase in area. It has industrial and technical advantages and is considered to be the mainstream of future solar cells. For this reason, application to various uses has been promoted, and in particular in the electric power field, the thin-film solar cell element 10 has been provided with an exterior such as a sealing protective layer and a reinforcing plate in order to sufficiently withstand use in an outdoor environment. Solar cell modules have already been put into practical use. As a specific example of the exterior, a light-receiving surface and a back surface of the thin-film solar cell element 10 are sealed with a sheet-like protective layer, and further a metal reinforcing plate is lined. After this backing, a terminal box is provided on the back side of the metal reinforcing plate, and the output lead wire leading hole opened in the metal reinforcing plate and the back side protective layer is communicated with the terminal box. Then, an output lead wire is wired between the electrode of the thin film solar cell element 10 and the terminal box, and the output of the thin film solar cell element 10 is taken out to the outside. A solar cell module configured as described above is known.

  Patent Document 2 describes a solar cell module as described above. 4 shows a plan view of the solar cell module 50 disclosed in Patent Document 2, FIG. 5 shows an XX sectional view of the solar cell module 50 shown in FIG. 4, and FIG. 6 shows terminals of the solar cell module 50. Details of the box 23 are shown. 4 to 6 indicate the same elements, and redundant description is omitted. In the manufacturing process of the solar cell module 50 shown in FIGS. 4 to 6, ethylene vinyl acetate (ethylene-vinyl acetate polymer; Ethylene polymer having a thickness substantially larger than that of the thin film solar cell element 10 is formed on the light receiving surface of the thin film solar cell element 10. A film-like adhesive layer using Vinyl Acetate (EVA) resin or the like is preliminarily laminated at a low temperature (temporary laminate). As shown in FIG. 4, a thin film solar cell element 10 obtained by further cutting the temporary laminate into a predetermined size is used. Further, as shown in FIG. 5, a film-like film formed using EVA resin or the like so as to cover the entire surface of the thin-film solar cell element 10 on the light receiving surface side (upper side on the drawing in FIG. 5). Light-receiving layer 11 and moisture-proof layer 12 formed on the light-receiving surface side of adhesive layer 11 using ethylene tetrafluoroethylene (ethylene tetrafluoroethylene: ETFE, ethylene / tetrafluoroethylene copolymer) or the like. Reinforcing layer 13 formed on the surface side, in which EVA fiber is filled with glass fiber to increase mechanical strength, and formed on the light-receiving surface side of reinforcing layer 13 for preventing adhesion of fouling substances using ETFE or the like A protective layer 14 is laminated. Thus, the light-receiving surface side protective layer 15 as a weather-resistant protective layer composed of the adhesive layer 11, the moisture-proof layer 12, the reinforcing layer 13 and the surface protective layer 14 is laminated to protect the thin-film solar cell element 10. .

  As shown in FIG. 5, EVA or the like is used so as to cover the entire back surface of the thin-film solar cell element 10 on the non-light-receiving surface side on the non-light-receiving surface side (the lower part in the drawing) opposite to the light-receiving surface side. The film-like adhesive layer 16 formed by using ETFE or a heat-resistant polymer polyimide that serves both as waterproof and electrical insulation on the non-light-receiving surface side of the adhesive layer 16. Then, a film-like adhesive layer 18 using EVA resin or the like, which is formed on the non-light-receiving surface side of the insulating layer 17 and serves to join the back surface reinforcing layer (plate) 20 (described later), is sequentially laminated. In this way, the non-light-receiving surface side protective layer 19 is formed by laminating the adhesive layer 16, the insulating layer 17, and the adhesive layer 18. Under the non-light-receiving surface side protective layer 19 (the backmost surface), a back surface reinforcing layer (metal reinforcing plate) 20 created using a steel plate (metal flat plate) or the like is lined. In the manufacturing process of the solar cell module 50, a vacuum laminator or the like is used in a state where the respective layers are laminated, and the layers are thermally fused and integrated while being pressurized (pressurized heat fusion laminate).

  In order to take out the power generation output of the solar cell module 50, as shown in FIGS. 4 and 5, solder-plated flat foil is applied to the non-power generation regions B 1 and B 2 that are distributed in advance on the left and right sides of the power generation region A of the thin-film solar cell element 10. A main wiring 21 made of copper wire is laid. In addition, a ten-pole, one-pole connection electrode layer 5 formed on the back surface of the thin-film solar cell element 10 via an auxiliary wiring 22 made of a conductive adhesive tape and a solder-plated flat foil copper wire (see FIG. 3). Keep connected. An output lead wire 24 connected to the main wiring 21 is drawn between the main wiring 21 and the terminal box 23 installed on the back surface of the back reinforcing layer 20 (details will be described later), and the thin film solar cell is connected via the output cable 25. The power generation output of the element 10 is taken out to the outside.

  Next, the details of the terminal box 23 of the solar cell module 50 will be described. As shown in FIG. 6, a hole 26 through which the output lead wire 24 is drawn is formed in the back surface reinforcing layer 20 disposed in contact with the terminal box 23. On the other hand, a hole 26 through which the output lead wire 24 is drawn is formed in the non-light-receiving surface side protective layer 19. The tip of the output lead wire 24 inserted from the outside is soldered to the main wiring 21 through the hole 26. 6, reference numeral 23a denotes a terminal block of the terminal box 23, 23b denotes a terminal screw, 23c denotes a lid of the terminal box 23, 27 denotes a conductor core of the output cable 25, 28 denotes a backflow prevention diode, and 29 denotes a hole in the terminal box 23. It is. The output lead 24 is led to the terminal block 23a through the hole 26 and the hole 29 of the terminal box 23, and its end is fixed together with the backflow prevention diode 28 by the terminal screw 23b. After connecting the output lead wire 24 to the terminal block 23a of the terminal box 23 as described above, the inside of the terminal box 23 is filled with a waterproof and insulating sealing resin, and rainwater from the outside of the solar cell module 50 is filled. It tries to prevent penetration into the inside.

  The terminal box 23 is attached and fixed to the back reinforcing layer 20 using an adhesive such as silicon resin or epoxy resin. The terminal box 23 to which these adhesives are attached is pressed and dried and cured for several hours to overnight.

  The attachment of the terminal box 23 using only the above-described adhesive has a problem in that an attachment failure occurs such that the terminal box 23 slips after bonding and a positional deviation occurs. As a method for preventing this problem, as described in Patent Document 3, there is known a method for attaching the terminal box 23 that uses both an adhesive such as a double-sided tape and an adhesive.

JP 2000-223727 A JP 2002-111032 A JP 2001-223382 A

However, the conventional terminal box mounting method described above has the following problems.
(1) The curing time is long.
One hour or more is required for drying and curing the adhesive. Even when an adhesive is also used, it is said that it is necessary to spend more than one night.
(2) Poor workability.
Since the solar cell module 50 cannot be moved until the adhesive is dried and cured, a large work space is required.
(3) A mounting failure occurs.
As described above, when the terminal box 23 is attached only by the adhesive, the terminal box 23 slips after bonding, and a positional deviation occurs.
(4) Skill is required to keep the pressing load of the terminal box 23 constant.
When the adhesive is applied and then left as it is, the output cable 25 and the like are fixed to the terminal box 23, so that the center of gravity of the solar cell module 50 cannot be obtained. As a result, the solar cell module 50 may be biased to one side, or a part of the terminal box 23 that is not bonded to the back surface reinforcing layer 20 may be formed. Therefore, a uniform and constant pressing load on the terminal box 23 is essential.
(5) The working environment is not good.
A solvent or the like is used for the adhesive. Solvent is also used for finishing. For this reason, ventilation equipment is required to prevent the work environment from deteriorating.
(6) Selection of material is necessary.
As described above, after the terminal box 23 is attached to the back reinforcing layer 20 with an adhesive, the inside of the terminal box 23 is filled with sealing resin. In consideration of the compatibility between the adhesive and the sealing resin, it is necessary to select each material so as to avoid, for example, a combination that causes curing inhibition.

  Therefore, the object of the present invention is to solve the above-mentioned problems, the terminal box installation work time is short and the workability is good, and the skill is not required, so the work cost is low and the attachment is poor. It is an object of the present invention to provide a method for attaching a terminal box for a solar cell, which is highly reliable after attachment because it is less likely to occur, does not require special considerations regarding the deterioration of the working environment, the selection of materials with an adhesive, and the like.

  The solar cell terminal box mounting method of the present invention is a solar cell terminal box mounting method for taking out the output of the solar cell to the outside. The solar cell is sealed on the light receiving surface side and the non-light receiving surface side with a protective layer. The protective layer on the non-light-receiving surface side is lined with a metal reinforcing layer, and a solar cell terminal box is provided on the back surface of the reinforcing layer. The protective layer and the reinforcing layer are provided with an opening hole communicating with each other, and an output lead wire from the thin film solar cell element taken out through the opening hole is provided on the solar cell terminal box side. It has a structure in which it is taken out through a hole having the same shape as the opening hole, and includes a bonding step of attaching the solar cell terminal box to the back surface of the reinforcing layer using a bonding curing type sheet-like adhesive It is characterized by

  Here, in the method for attaching a terminal box for a solar cell of the present invention, the bonded curing type sheet-like adhesive is a room temperature curing type, and an addition reaction crosslinking is performed under a platinum catalyst by bonding two components. A rubber elastic body can be formed.

  Here, in the method for attaching the solar cell terminal box of the present invention, the laminating step is performed after the laminating and curing type sheet-like adhesive is pasted on the solar cell terminal box side and the reinforcing layer. The solar cell terminal box can be bonded to the back surface of the reinforcing layer for crosslinking.

  Here, in the method for attaching the solar cell terminal box of the present invention, the bonding and curing type sheet-like adhesive may be punched into the shape of the solar cell terminal box.

  Here, in the method for attaching the solar cell terminal box of the present invention, a hole having the same shape as the opening hole can be provided in the bonding and curing type sheet-like adhesive.

  Here, in the method for attaching the solar cell terminal box of the present invention, the bonding and curing type sheet-like adhesive may have a different curing rate depending on the film thickness of the sheet-like adhesive.

According to the solar cell terminal box mounting method of the present invention, the terminal box mounting and bonding and fixing operations do not include a solvent, and may simply be performed by bonding a bonding-curing sheet adhesive. For this reason, the work for attaching the terminal box is short, the workability is good, and further, no skill is required, so that the work cost can be reduced. In addition, it is less likely to cause improper installation, providing high reliability after installation, providing an excellent working environment, and providing a solar cell terminal box installation method that does not require special consideration for the selection of materials with adhesives. There is an effect that can be done.

  Hereinafter, each embodiment will be described in detail with reference to the drawings.

  FIG. 1 is a schematic view for explaining a method for attaching a terminal box for a solar cell of the present invention. In FIG. 1, the assembling is performed in the reverse procedure to the stacking direction (from bottom to top) of the solar cell module 30. In the structure of the conventional solar cell module 50 shown in FIG. 5, the moisture-proof layer 12, the reinforcing layer 13, and the insulating layer 16 are formed on the sunlight incident side. However, as a result of reliability tests and the like by the applicant, it has been found that the structure excluding the above layers is sufficiently reliable. Therefore, the structure excluding each layer as shown in FIG. 1 was adopted. In FIG. 1, the portions denoted by the same reference numerals as those in FIGS. 5 and 6 indicate the same elements, and thus the description thereof is omitted.

  As shown in FIG. 1, first, an adhesive layer 11 and a surface protective layer 14 on the sunlight incident side are assembled on a support plate (not shown) subjected to a peeling treatment. Next, the temporarily laminated thin film solar cell element 10 is assembled. An electrode on the back surface side of the thin-film solar cell element 10 is connected to a main wiring 21 made of a solder-plated flat foil copper wire (thickness: 0.1 mm) having a width of 6 mm via an auxiliary wiring 22. As the auxiliary wiring 22, a laminated tape having a width of 6 mm (conductive adhesive tape / aluminum tape / PET tape: trade name AIPET: manufactured by Lintec Corporation) and a solder-plated flat foil copper wire having a width of 2 mm (thickness: 0.075 mm) Is preferably used. Assembling is performed sequentially while maintaining a predetermined interval so that the solar cell elements 10 do not contact each other.

  Similar to the conventional solar cell module 50 shown in FIG. 5, the opening hole of the adhesive layer 18 as the back surface side sealing material having the opening hole 26 opened at the same position as the hole in the back surface reinforcing layer 20 (metal steel plate). 26, one side of the output lead wire 24 inserted from the outside is soldered to the main wiring 21, and the other side of the output lead wire 24 is taken out to the outside. Finally, a 0.8 mm-thick metal steel plate (Sunlite GL: manufactured by Taiyo Steel Co., Ltd.) is used as the back surface reinforcing layer 20, and a φ10 mm opening hole 26 opened in the back surface reinforcing layer 20 (also referred to as the metal steel plate 20). Assemble so as not to contact output lead 24. After positioning the back surface reinforcing layer 20, the end portion of the metal steel plate 20 is fixed on a support plate (not shown) subjected to a peeling treatment using a Teflon (registered trademark) tape. The output lead wire 24 taken out from the opening hole 26 of the metal steel plate 20 is bent so as not to contact the opening hole 26 of the metal steel plate 20 and sealed with Teflon (registered trademark) tape together with the opening hole 26 of the metal steel plate 20. Secure it.

After assembling and fixing each material, the laminate is laminated under a predetermined condition (150 ° C., 20 minutes curing) to obtain a solar cell module 30. Subsequently, the terminal box (solar cell terminal box) 23 is attached (bonding step).

  FIG. 2A shows a bottom view of the terminal box 23 (on the back reinforcing layer 20 side). In FIG. 2A, the same reference numerals as those in FIG. As shown in FIG. 2A, a bonding type adhesive polymer ace-A (HM-50) 34-A having a thickness of 0.3 mm is previously applied to the bottom surface of the terminal box 23 (on the back reinforcing layer 20 side). Paste and store. In the adhesive polymer ace-A (HM-50) 34-A, an opening hole 26 portion having the same shape as the opening hole 26 provided in the terminal box 23 is also secured and punched into the same dimensions as the terminal box 23. ing. Adhesive Polymer Ace-A (HM-50) 34-A has a release film on one side (opposite to the side bonded to the terminal box 23). It is. As described above, since the output lead wire 24 is bent and sealed and fixed with the Teflon (registered trademark) tape together with the opening hole 26 of the metal steel plate 20, the output lead wire 24 is then opened to the opening of the metal steel plate 20. Cause after removing Teflon tape from hole 26.

  FIG. 2B shows a plan view of the adhesive polymer ace-B (HM-50) 34-B. In FIG. 2B, the same reference numerals as those in FIG. Adhesive Polymer Ace-B (HM-50) 34-B is a 3 mm-thick bonding type, and as shown in FIG. Stamped to dimensions. The output lead wire 24 is not in contact with the hole 26 of the metal steel plate, and the adhesive polymer ace-B (HM-50) is placed at a predetermined position of the metal steel plate 20 (a position where the hole 26 of the metal steel plate and the opening hole 26 portion meet). ) Stick and fix 34-B.

  FIG. 2C shows a cross-sectional view of the terminal box 23. In FIG. 2C, portions denoted by the same reference numerals as those in FIGS. 1, 2A, and 2B indicate the same elements, and thus description thereof is omitted. In the state where the adhesive polymer ace-B (HM-50) 34-B is stuck and fixed at a predetermined position of the metal steel plate 20 as described above, as shown in FIG. The terminal box 23 to which the polymer ace-A (HM-50) 34-A is affixed is bonded to the position of the polymer ace-B (HM-50) 34-B by aligning both opening hole portions 26, and then cured. Start. Bonding is performed by peeling off the release film attached to one side of the adhesive polymer ace-A (HM-50) 34-A. In FIG. 2 (C), reference numerals 34-A / B denote adhesive polymer ace-A (HM-50) 34-A and adhesive polymer ace-B (HM-50) 34-B in a bonded state. Indicates.

  As described above, the adhesive polymer ace-A (HM-50) 34-A and the adhesive polymer ace-B (HM-50) 34-B are bonded to each other in the terminal box 23 after two hours have elapsed. Liquid type silicon resin KE200 / XE200 (manufactured by Shin-Etsu Chemical Co., Ltd.) was mixed and filled and cured to perform insulation treatment that also prevented moisture intrusion, and a terminal box lid 23c was attached.

  Immediately after bonding, the output cable 25 of the terminal box 23 was lifted, and it was firmly adhered and did not peel off. That is, it was found that the adhesive effect was also maintained. Accordingly, there is an advantage that a large work area is not required because it is not necessary to leave overnight and can be moved in a short time after bonding.

  Bond curing type sheet-like adhesive Polymer Ace-A (HM-50) 34-A, etc., forms two components separately in a sheet form and covers them with a release film to prevent each component from scattering and sticking. To do. Various film thicknesses can be prepared, but usually 0.2 mm to 3.0 mm is preferable. When the film thickness is 0.2 mm or less, the manufacturing process is difficult and handling is difficult. On the other hand, when the film thickness is 3.0 mm or more, the addition reaction cross-linking after bonding takes a long time, so workability may be lowered.

  Bond curing type sheet-like adhesive Polymer Ace-A (HM-50) 34-A, etc., is a room temperature curing type, and it is subjected to addition reaction crosslinking under a platinum catalyst by laminating two components, resulting in rubber elasticity. The body can be formed. For this reason, after affixing each to the terminal box 23 and the metal steel plate 20, it can bridge | crosslink only by bonding both. As the shape and dimensions of the adhesive curing type sheet-like adhesive polymer ace-A (HM-50) 34-A, etc., those which are punched into the shape of the terminal box 23 and the shape of the output opening 26 of the output lead wire 25 are used. By doing so, workability can be improved.

  Further, the bonding curing type sheet-like adhesive polymer ace-A (HM-50) 34-A has a feature that the curing rate can be changed depending on the film thickness. For this reason, the film pressure can be properly used depending on the shape of the terminal box 23.

  As described above, the operation of attaching the terminal box 23 to the metal steel plate 20 is simple, and a solar cell module having high reliability both electrically and mechanically can be provided.

  As described above, according to the method for attaching a terminal box for a solar cell of the present invention, the attachment of the terminal box 23 and the adhesive fixing operation do not include a solvent, and only two adhesive-curing sheet adhesives are bonded together. Good. For this reason, the installation work time of the terminal box 23 is short, the workability is good, and further, no skill is required, so the work cost can be reduced. In addition, it is less likely to cause improper installation, providing high reliability after installation, providing an excellent working environment, and providing a solar cell terminal box installation method that does not require special consideration for the selection of materials with adhesives. can do.

Comparative form.
A conventional silicon adhesive KE45 (manufactured by Shin-Etsu Chemical Co., Ltd.) is applied to the terminal box 23 side without using a bonding type adhesive polymer ace-A (HM-50) 34-A, etc. 20 except that it was affixed to No. 20. The silicone adhesive KE45 was allowed to stand overnight at room temperature for curing. The above coating operation requires careful attention to obtain a uniform film. The silicon adhesive KE45 protruding outside the terminal box 23 was cleaned using a solvent.

  In the above-described conventional method (comparative form), the mounting operation takes twice or more time as compared with Example 1, and a solvent is used.

  As an application example of the present invention, it can be applied to the installation of a terminal box for solar cells.

It is a figure which shows the schematic for demonstrating the terminal box attachment method for solar cells of this invention. FIG. 4 is a bottom view of the terminal box 23 (on the back reinforcing layer 20 side). It is a top view of adhesive agent polymer ace-B (HM-50) 34-B. 3 is a cross-sectional view of a terminal box 23. FIG. It is a perspective view which shows the structure of the conventional film substrate type thin film solar cell element 10. FIG. 10 is a plan view of a solar cell module 50 disclosed in Patent Document 2. FIG. It is XX sectional drawing of the solar cell module 50 shown by FIG. It is a figure which shows the detail of the terminal box 23 of the solar cell module 50 currently disclosed by patent document 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plastic film substrate, 2 Photoelectric conversion layer, 3 Transparent electrode layer, 4 Back surface electrode layer (lower electrode layer), 5 Connection electrode layer, 6 Current collection hole (current collection hole, through hole), 7 Connection hole, 8, 9 Separation position (dividing groove), 10 thin film solar cell element, 11, 16, 18 adhesive layer, 12 moisture-proof layer, 13 reinforcing layer, 14 surface protective layer, 15 light-receiving surface side protective layer, 17 insulating layer, 19 non-light-receiving surface side Protective layer, 20 Back reinforcement layer (metal steel plate), 21 Main wiring, 22 Auxiliary wiring, 23 Terminal box, 23a Terminal block, 23b Terminal screw, 23c Lid, 24 Output lead wire, 25 Output cable, 26 Open hole, 27 Conductor Core wire, 28 Backflow prevention diode, 29 Hole in terminal box 23, 30, 50 Solar cell module, 34-A Bonding and curing type sheet adhesive polymer ace-A (HM-50), 34-B Bond curing type sheet-like adhesive Polymer Ace-B (HM-50).

Claims (6)

A solar cell terminal box mounting method for taking out the output of a solar cell to the outside, wherein the solar cell has a thin film solar cell element in which a light receiving surface side and a non-light receiving surface side are sealed with a protective layer, and is not receiving light The protective layer on the surface side is lined with a metal reinforcing layer, a terminal box for a solar cell is provided on the back surface of the reinforcing layer, and an opening communicated with the protective layer on the non-light-receiving surface side and the reinforcing layer A structure in which a hole is provided and an output lead wire from the thin film solar cell element taken out through the opening hole is taken out through a hole having the same shape as the opening hole provided on the solar cell terminal box side. Have
A method for attaching a solar cell terminal box, comprising: a step of attaching the solar cell terminal box to a back surface of the reinforcing layer using an adhesive curable sheet adhesive.   2. The method for attaching a terminal box for a solar cell according to claim 1, wherein the bonded curing type sheet-like adhesive is a room temperature curing type and is subjected to addition reaction crosslinking under a platinum catalyst by bonding two components. A method for attaching a terminal box for a solar cell, comprising forming a rubber elastic body.   In the attachment method of the terminal box for solar cells of Claim 1 or 2, the said bonding process affixed the said sheet | seat adhesive of the said bonding hardening type on the said terminal box side for solar cells, and the said reinforcement layer. Then, the solar cell terminal box is bonded to the back surface of the reinforcing layer to be crosslinked, and the solar cell terminal box is attached.   In the attachment method of the terminal box for solar cells in any one of Claims 1 thru | or 3, the said bonding curing type sheet-like adhesive is a thing punched in the shape of the terminal box for solar cells, How to install the solar cell terminal box.   5. The method for attaching a solar cell terminal box according to claim 4, wherein a hole having the same shape as the opening hole is provided in the bonding and curing type sheet-like adhesive. . In the attachment method of the terminal box for solar cells in any one of Claims 1 thru | or 5, the said hardening rate type sheet-like adhesive is that hardening rate changes according to the film thickness of this sheet-like adhesive. A method for attaching a terminal box for a solar cell, which is characterized.

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