JP2010004068A - Terminal box and solar-battery module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact terminal box by devising a structure for pulling out a lead line. <P>SOLUTION: A terminal box includes: a box case 11 fixedly mounted on a back film 125 of a solar cell string 116; and a terminal table 20 formed on the box case 11. Furthermore, the box case 11 is formed by a case body 12 fixedly mounted on the back film 125 of the solar cell string 116 and a terminal table fixing unit 13 for fixing the terminal table 20 on the top of the case body 12. Openings 14 (14a, 14b, 20a) are formed, in series from the bottom of the case body 12 to the upper surface of the terminal table 20 for passing an output lead line 122a to above the terminal table 20, and one end portion 20b of the terminal table 20 protrudes from the terminal fixing unit 13 so that the tip end 122a1 of the output lead line 122a can be bent so as to be engageable with the end portion. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a terminal box that is electrically connected to an output lead wire that is connected to an electrode of a solar battery cell and pulled out through a back film, and more specifically, has a feature in the wiring structure of the output lead wire. The present invention relates to a terminal box and a solar cell module including the terminal box.

  2. Description of the Related Art Photovoltaic power generation systems that perform solar power generation by laying a plurality of solar cell strings in a matrix on the roof of a building and the like have begun to be widely spread. In such a solar cell power generation system, each solar cell module is provided with a terminal box that can be electrically connected to other solar cell modules installed adjacent to each other.

  An example of a conventional terminal box is shown in FIG. 5A is a sectional view, and FIG. 5B is a plan view.

  The terminal box 200 of this prior art 1 is placed and fixed on the back surface of the solar cell string 300 in order to electrically connect the output lead wire 301 drawn through the back film 310 of the solar cell string 300. A box case 201 and a terminal block 210 formed on the box case 201. The box case 201 includes a case main body 202 placed and fixed on the back surface of the solar cell string 300, and a terminal block fixing portion 203 for mounting and fixing the terminal block 210 on the case main body 202. It has become.

  The case main body 202 is formed with a main body insertion hole 204 through which the output lead wire 301 drawn from the back surface of the solar cell string 300 is drawn upward. Further, one end portion 211 of the terminal block 210 on the side facing the main body insertion hole 204 is provided so as to protrude from the terminal fixing portion 203, and the tip end portion 302 of the output lead wire 301 is inserted into this protruding portion. A terminal block insertion hole 212 is formed for this purpose.

  When the output lead wire 301 is electrically connected using the terminal box 200 having such a configuration, the solar cell string 300 is first placed on a work table (not shown) with the back surface of the solar cell string 300 facing upward. The terminal box 200 is placed from above the solar cell string 300 by aligning the tip end portion 302 of the output lead wire 301 drawn upward from the back surface of the string 300 so that the main body insertion hole 204 of the terminal box faces. Placed on. Next, in this state, the output lead wire 301 protruding upward from the main body insertion hole 204 is pinched with tweezers or the like and bent toward the terminal block 210, and the tip portion 302 of the output lead wire 301 is formed on the terminal block 210. The base is inserted into the base insertion hole 212 from above. In this state, the output lead wire 301 on the terminal block 210 is fixed to the terminal block 210 by soldering, so that the output lead wire 301 is attached and fixed to the terminal block 210.

As described above, the tip 302 of the output lead wire 301 is not simply fixed by solder, but is temporarily inserted (locked) into the terminal block insertion hole 212 and then fixed by solder according to the IEC (International Electrotechnical Commission) standard. This is because it is defined (specified that solder fixing alone is not enough).

  Moreover, the structure of the terminal box (connection box) of patent document 1 is shown in FIG. 6 as another example of the conventional terminal box.

  The terminal box 402 described in Patent Document 1 is inserted from the frame insertion hole 426 into the other end in the longitudinal direction of the terminal 421 inserted from the cable fitting hole 410 of the box body 424 and secured to the terminal fixing portion 427. The leading end portion of the inserted lead frame 416 is connected by soldering, and the lower surface of the box body 424 of the terminal box 402 is bonded and fixed to the back surface of the solar cell string body 401 with an adhesive.

  On the other hand, in the terminal box 100 of prior art 1, the output lead wire 201 and the terminal block 110 are fixed by soldering. However, a terminal box that eliminates such a soldering process has also been proposed. (For example, refer to Patent Document 2).

  As shown in FIG. 7, the terminal box described in Patent Document 2 is attached so as to cover the electrode extraction portion 506 of the solar cell string 507, and the terminal box 501 has a bottom surface for taking in the internal lead wire 503. An internal lead wire intake hole 508 is formed. In the terminal box 501, a relay terminal support 505 for mechanically fixing the relay terminal 504 is formed in the vicinity of the internal lead wire taking hole 508. The internal lead wire 503 and the external output wire 502 are electrically and mechanically connected to each other by the relay terminal 504, and the latching portion (opening portion) 513 formed in the relay terminal 504 is used as a rod-shaped relay terminal support. The relay terminal 504 is mechanically fixed to the relay terminal support body 505 by passing through 505.

JP 2001-250974 A Japanese Patent Laid-Open No. 11-17204

  In the terminal box of Prior Art 1, the step of inserting the tip end portion 302 of the output lead wire 301 protruding upward from the main body insertion hole 204 into the terminal block insertion hole 212 formed in the terminal block 210 from above is required. Therefore, there was a problem that automation was difficult.

  Further, a main body insertion hole 204 for taking out the output lead wire 301 and a terminal block insertion hole 212 of the terminal block 210 for inserting the tip end portion 302 of the taken out output lead wire 301 are individually provided. Since the output lead wire 301 taken out from the insertion hole 204 is bent and inserted into the terminal block insertion hole 212, a certain distance is required from the main body insertion hole 204 to the terminal block insertion hole 212, and the space in this portion is wasted. There was a problem such as. That is, there is a problem that it is difficult to reduce the size of the terminal box. This problem is also a problem that occurs similarly in the terminal boxes described in Patent Document 1 and Patent Document 2.

  Further, since there is a certain distance from the main body insertion hole 204 to the terminal block insertion hole 212, the output lead wire 301 also needs to be drawn out from the main body insertion hole 204 sufficiently long. For this reason, there is a problem that the output lead wire 301 may not be stably soldered to the terminal block 210 due to the wobbling of the drawn output lead wire 301. This problem is also a problem that occurs in the terminal box described in Patent Document 1 as well.

Furthermore, when covering the terminal box 200 from above the solar cell string 300, the inner diameter of the main body insertion hole 204 is sufficiently large so that the edge of the main body insertion hole 204 of the terminal box 200 does not bend by contacting the output lead wire 301. It needs to be large. That is, the main body insertion hole 204 needs to be formed in a large opening. Therefore, when the distal end portion 302 of the output lead wire 301 is inserted into the terminal block insertion hole 212 of the terminal block 210 from above, if the output lead wire 301 is inserted deeply, the distal end portion 302 of the output lead wire 301 becomes the terminal block fixing portion 203. The side surface 203a of the case body 202 and the upper surface 202a of the case main body 202, etc., may be bent in a C shape, and may enter from the main body insertion hole 204 to the back surface of the solar cell string 300. There was a problem such as.

  Note that the terminal box described in Patent Document 1 has a problem in that the lead frame 416 is simply soldered to the terminal 421, so that the fixing strength is not sufficient and the terminal box is not compliant with the IEC standard. there were. Similarly, in the terminal box described in Patent Document 2, the internal lead wire 503 and the external output wire 502 are fixed to the relay terminal 504 only by soldering, so that the strength of this portion is not sufficient, There was a problem that it did not comply with the IEC standard.

  The present invention was devised to solve such problems, and its purpose is to focus particularly on the terminal box of the prior art 1 and to improve the terminal box and the terminal box which have solved the above problems. It is providing the solar cell module provided with.

  In order to solve the above problems, a terminal box of the present invention is a terminal box that is connected to an electrode of a solar battery cell and electrically connects an output lead wire that is drawn through a back film, and is on the back film. And a terminal block for electrically connecting the output lead wire formed on the box case, and the box case is further mounted and fixed on the back film. The case main body includes a terminal block fixing portion for mounting and fixing the terminal block on the upper portion of the case main body, and an opening for passing the output lead wire to above the terminal block is a bottom surface of the case main body. To the upper surface of the terminal block.

  Further, the solar cell module of the present invention is a solar cell module including a terminal box that is connected to the electrode of the solar cell and electrically connects the output lead wire drawn through the back film, the terminal The box includes a box case that is placed and fixed on the back film, and a terminal block that electrically connects the output lead wires formed on the box case. The box case further includes the back film. An opening for passing the output lead wire up to the upper side of the terminal block, comprising a case main body mounted and fixed on the terminal block, and a terminal block fixing portion for mounting and fixing the terminal block on the upper portion of the case main body. The portion is formed in a series from the bottom surface of the case body to the top surface of the terminal block.

  According to the said structure, the opening part for letting an output lead wire pass to the upper direction of a terminal block is formed in a row from the bottom face of a case main body to the upper surface of a terminal block. That is, there is only one opening, and unlike the prior art 1, the main body insertion hole 104 and the terminal block insertion hole 112 are not provided separately, so that it is wasteful like the terminal box of the prior art 1. Space can be eliminated and the terminal box itself can be miniaturized.

  According to the present invention, the opening formed in the case body is formed in a tapered through hole that gradually expands from the side communicating with the terminal block fixing portion toward the bottom surface of the case body. It is preferable. By forming the tapered shape in this way, the diameter of the lower end portion of the opening through which the output lead wire is inserted becomes large, so that the problem that the output lead wire hits the edge of the opening and is bent can be prevented. it can.

Moreover, according to this invention, it is good also as a structure which the one edge part of the said terminal block protruded from the said terminal block fixing part so that the front-end | tip part of the said output lead wire can be bent and latched. That is, according to the present invention, the output lead wire protruding upward from the opening is pressed against the edge of the opening as it is and bent to one edge side of the terminal block, and the bent tip is one side of the terminal block. It is possible to lock and fix the tip end of the output lead wire to the terminal block by bending it until it is folded back downward. In other words, the tip of the output lead wire is securely attached to the terminal block only by performing the bending process twice with the two edges of the opening of the terminal block and one edge of the terminal block as the starting points. It becomes possible to lock and fix to. As a result, the next step of soldering the tip of the output lead wire to the terminal block can be stably performed, and a terminal box mounting structure sufficiently compliant with the IEC standard can be obtained.

  Further, according to the present invention, the terminal block fixing portion is formed by a pair of terminal block fixing pieces erected at a predetermined interval in the front-rear direction of the case body, and between the terminal block fixing pieces. It is good also as an opening part for letting the said output lead wire pass. That is, the opening formed in the terminal block fixing portion is not a so-called hole having a cylindrical shape, but has a structure like a groove having both left and right sides opened. Therefore, after connecting the output lead wire and external output wire to this terminal box, when the resin is sealed by potting, the potting material tends to flow into the inside from the opening, and the output lead pulled out through the back film It becomes possible to securely seal the periphery of the wire with resin. In this case, the case body may have a configuration in which an air vent hole extending from the bottom surface to the top surface of the case body is provided. By providing an air vent hole, when the potting material flows into the opening, the air present in the opening and in the gap between the back surface of the solar battery cell and the bottom surface of the terminal box escapes to the outside from the air vent hole. Can be reliably filled in the opening (more specifically, to the back film of the solar cell in the opening, and further to the gap between the back film of the solar cell and the bottom of the terminal box), and there is no void. Resin sealing can be performed.

  According to the present invention, since the openings for passing the output lead wires up to the upper side of the terminal block are formed in series from the bottom surface of the case body to the upper surface of the terminal block, two insertion holes are provided as in the prior art. There is no need to provide them separately. Therefore, it is possible to reduce the size of the terminal box itself without using a wasted space like the terminal box of the prior art.

The embodiment of the terminal box of this invention is shown, (a) is sectional drawing, (b) is a top view. It is a perspective view of the terminal box of this embodiment. The example of a structure of a solar cell string is shown, (a), (b) has shown two scenes of a manufacturing process. It is explanatory drawing which shows the process of carrying out the lamination sealing of the solar cell string. The structure of the terminal box concerning the prior art 1 is shown, (a) is sectional drawing, (b) is a top view. It is sectional drawing which showed the structure of the terminal box (connection box) of patent document 1. FIG. It is the whole perspective view showing the structure of the terminal box (connection box) given in patent documents 2.

  Embodiments of the present invention will be described below with reference to the drawings.

<Description of solar cell string>
First, one structural example of the solar cell string to which the terminal box of the present invention is applied will be described with reference to FIGS. 3 (a), 3 (b) and FIG.

  Although not shown, the solar battery cell 115 is formed by laminating a transparent electrode film made of a transparent conductive film, a photoelectric conversion layer, and a back electrode film in this order, although not shown. As the light-transmitting insulating substrate, there are heat-resistant resins such as glass and polyimide. Examples of the transparent electrode film include SnO2, ZnO, and ITO. There is amorphous silicon as the photoelectric conversion layer.

  As shown in FIG. 3A, the solar battery 115 configured as described above has a long and narrow strip shape and has a length extending over almost the entire width of the translucent insulating substrate 111, and the adjacent solar battery cells 115. 115, one transparent electrode film and the other back electrode film are connected to each other to form a solar cell string 116 in which a plurality of solar cells 115 are connected in series.

And the linear P-type electrode terminal part 117 of the length substantially the same as the photovoltaic cell 115 is formed on the edge part of the transparent electrode film of the photovoltaic cell 115 of the one end part in this solar cell string 116, and the other end A linear N-type electrode terminal portion 118 having substantially the same length as that of the solar battery cell 115 is formed on the end portion of the back electrode film of the solar battery cell 115. These P-type electrode terminal portion 117 and N-type electrode terminal portion 118 serve as an electrode extraction portion. By using the same length in this way, the current flowing in series in the plurality of solar cells 115 of the solar cell string 116 is not concentrated locally, and the current can be taken out uniformly, so that the series resistance Loss generation can be suppressed.

  An insulating film 119 is laid on the solar cell string 116 so as to extend between the central portion of the P-type electrode terminal portion 117 and the central portion of the N-type electrode terminal portion 118. The insulating film 119 is laid so as not to overlap the P-type electrode terminal portion 117 and the N-type electrode terminal portion 118. As the insulating film 119, a thermoplastic polymer film is preferable, and an insulating film made of EVA (ethylene vinyl acetate resin) is optimal.

  On the other hand, a positive electrode current collector 120 called a bus bar made of a copper foil having the same shape and size as the P-type electrode terminal portion 117 is electrically and mechanically joined to the entire surface of the P-type electrode terminal portion 117. Similarly, a negative electrode current collector 121 having the same shape and size as the N-type electrode terminal portion 118 is electrically and mechanically joined to the entire surface of the N-type electrode terminal portion 118. As these joining means, soldering or conductive paste can be used.

  On the insulating film 119, a positive electrode lead wire 122 and a negative electrode lead wire 123 made of a flat cable are arranged in a straight line (or in a parallel state shifted in the width direction) with their tip portions facing each other. ing.

  One end of the positive electrode lead wire 122 is connected to the center position of the positive electrode current collector 120. The other end portion of the positive electrode lead wire 122 is a rising terminal portion 122 a that is positioned substantially at the center of the solar cell string 116 and is bent perpendicularly to the surface of the solar cell string 116. Similarly, one end of the negative electrode lead wire 123 is connected to the center position of the negative electrode current collector 121. The other end portion of the negative electrode lead wire 123 is a rising terminal portion 123 a that is positioned substantially at the center of the solar cell string 116 and is bent perpendicularly to the surface of the solar cell string 116.

  The positive electrode lead wire 122 and the negative electrode lead wire 123 are made of the same material (that is, copper foil) as the positive electrode current collector 20 and the negative electrode current collector 21, and solder is used as a joining means between each lead wire and the current collector. Attaching or spot welding can be used. The positive electrode lead wire 22 and the negative electrode lead wire 23 extend over the plurality of solar cells 115, but since the insulating film 119 is interposed between the solar cells 115, the plurality of solar cells 115 are connected to each other. There is no short circuit. The width of the insulating film 119 is desirably sufficiently wider than the width of the positive electrode lead wire 122 and the negative electrode lead wire 123, and is arranged in the form of a single sheet from the positive electrode current collector 120 to the negative electrode current collector 121. Yes.

In this state, as shown in FIG. 4, the sealing insulating film 124 and the weather resistance in a state where the rising terminal portions 122a and 123a of the positive electrode lead wire 122 and the negative electrode lead wire 123 are inserted into the through hole 124a and the through hole 125a. A back film 125 as a back surface protective material for high insulation is laminated and sealed on the entire surface of the solar cell string 116. As the sealing insulating film 124, a thermoplastic polymer film made of the same material as the insulating film 119 is preferable, and an EVA (ethylene vinyl acetate resin) film is most suitable. If the sealing insulating film 124 is a thermoplastic polymer film made of the same material as the insulating film 119, the molecular bond between the two effectively proceeds at the time of heat-sealing at the time of laminate sealing, and integration after cooling is performed. Thus, the waterproof property of the solar cell string can be improved. The back film 125 preferably has a three-layer structure of PET / Al / PET (PET: polyethylene terephthalate). As an example of the thickness, the back film 125 is set to 100 μm with respect to the insulating film 119: 100 μm and the sealing insulating film 124: 600 μm.

  In the solar cell string 116 configured as described above, the terminal of the present invention is connected to each of the rising terminal portions 122a and 123a of the positive electrode lead wire 122 and the negative electrode lead wire 123 protruding upward from the through hole 125a of the back film 125. A solar cell module is manufactured by attaching and electrically connecting a box, and further electrically attaching an external output line to the terminal box.

  Note that the electrode arrangement structure of the solar cell string 116 is merely an example, and is not limited to such an arrangement structure. For example, the arrangement positions of the positive electrode lead wire 122 and the negative electrode lead wire 123 may be closer to one end side than the center portion of the solar cell string 116, and it is not necessary to draw out to the center portion. That is, the rising terminal portions 122a and 123a may be disposed so as to protrude upward from the vicinity of the positive electrode current collector 20 and the negative electrode current collector 21.

<Description of terminal box>
1A and 1B show an embodiment of a terminal box according to the present invention, in which FIG. 1A is a schematic sectional view and FIG. 1B is a plan view. FIG. 2 is a perspective view showing the terminal block portion in a separated state. However, although the terminal box is attached to each of the rising terminal part 122a of the positive electrode current collecting part 20 and the rising terminal part 123a of the negative electrode current collecting part 21, the attachment structure is the same. Then, the case where it attaches to the rising terminal part 122a of the positive electrode current collection part 20 is demonstrated.

  The terminal box 1 of the present embodiment is a solar cell in order to electrically connect a rising terminal portion (hereinafter also referred to as an output lead wire) 122a drawn through the back film 125 from the back surface of the solar cell string 116. The box case 11 is placed and fixed on the back film 125 of the string 116, and the terminal block 20 formed on the box case 11. The box case 11 includes a case main body 12 that is placed and fixed on the back film 125 of the solar cell string 116, and a terminal block fixing portion 13 for mounting and fixing the terminal block 20 on the case main body 12. It is made up of.

  In the present embodiment, the box case 11 is formed in a rectangular parallelepiped shape that is long in the left-right direction in FIG. 1B and short in the width direction, and the terminal block fixing portion 13 is formed in a substantially cubic shape as a whole. .

  In such a configuration of the box case 11, in this embodiment, the opening 14 (14 a, 14 b, 20 a) for passing the output lead wire 122 a up to the upper side of the terminal block 20 is formed from the bottom surface of the case body 11 to the terminal block 20. It is formed in a series up to the top surface. That is, there is only one opening through which the output lead wire 122a is passed, and since the main body insertion hole 104 and the terminal block insertion hole 112 are not separately provided as in the prior art 1, the prior art It is possible to eliminate a useless space such as one terminal box, and to reduce the size of the terminal box itself.

Here, in this embodiment, the opening part 14a formed in the terminal block fixing | fixed part 13 is a pair of terminal erected with a predetermined space | interval in the left-right direction of the case main body 11, as shown in FIG. It is formed by the base fixing pieces 13a and 13b, and an opening 14a for passing the output lead wire 122a is formed between the terminal base fixing pieces 13a and 13b. That is, the opening 14a formed in the terminal block fixing portion 3 is not a so-called hole having a cylindrical shape, but has a structure like a groove having both left and right sides opened. Therefore, when the terminal lead 1 is connected to the output lead wire 122a and an external output wire (not shown) (wire for connecting to another adjacent solar cell module) and then sealed with potting, the potting material is It becomes easy to flow into the opening 14b of the case body 11 from the opening 14a (and further to the back film 125 of the solar cell string 116), and the periphery of the output lead wire 122a drawn from the back film 125 of the solar cell string 116 Can be reliably sealed with resin.

  Note that the opening 20a of the terminal block 20 has a rectangular shape that is long in the width direction in accordance with the shape of the opening 14a.

  Moreover, in this embodiment, the opening part 14b formed in the case main body 11 is formed in the square shape seeing from the plane, and each inner wall surface communicates with the terminal block fixing part 13 (that is, the opening part 14a). Are formed in a tapered shape that gradually expands from the lower end edge of the case toward the bottom surface of the case body 11. By forming the taper in this way, the diameter of the lower end of the opening 14b through which the output lead 122a is inserted increases, so that when the terminal box 1 is covered from above, the output lead 122a is connected to the opening 14b. It is possible to prevent problems such as bending when hitting the edge.

  In the present embodiment, the terminal block 20 is formed in a quadrangular shape in accordance with the shape of the upper surface of the terminal block fixing portion 13, but one edge portion 20b bends the tip end portion 122a1 of the output lead wire 122a. It protrudes from the terminal block fixing part 13 so that it can be stopped. That is, in this embodiment, the output lead wire 122a protruding upward from the opening 20a of the terminal block 20 is pressed against the edge of the opening 20a as it is (on the one edge side of the terminal block 20 (in FIG. 1)). Right end), the front end portion of the output lead wire 122a is locked to the terminal block 20 by bending the bent front end portion against the one edge portion 20b of the terminal block 20 and folding it downward. It can be fixed. That is, the tip end portion of the output lead wire 122a can be obtained only by performing two folding steps with the two edges of the edge portion 20b of the terminal block 20 and one edge portion 20b of the terminal block 20 as the bending starting points. 122a1 can be securely locked to the terminal block 20. This makes it possible to stably perform the next step of soldering the bent portion of the output lead wire 122a to the terminal block 20, and to provide a terminal box mounting structure that fully complies with the IEC standard. In addition, since there is no need for the routing space for the output lead wire for soldering as in the prior art, there is an advantage that the degree of freedom of arrangement of diodes and other wirings provided in the terminal box can be increased.

  Moreover, in this embodiment, it is good also as a structure which provided the air vent hole 16 which reaches the upper surface from the bottom face in the appropriate place of the case main body 11. FIG. However, the air hole 16 is provided at a position sufficiently away from the terminal block fixing portion 13. In order to attach the terminal box 1 to the back film 125 of the solar cell string 116, the bottom surface of the case body 12 of the terminal box 1 has a periphery (even around the entire circumference, for example, four corners). Good) is coated with a silicon resin 18 for adhesion. Therefore, when the terminal box 1 is bonded and fixed on the back film 125 of the solar cell string 116, a gap S is formed between the bottom surface of the case body 12 and the back film 125 of the solar cell string 116 by the thickness of the silicon resin 18. It will be possible. Therefore, by providing the air vent hole 16, when the potting material flows into the opening 14, it exists in the gap S between the inside of the opening 14 and the back film 125 of the solar cell string 116 and the bottom surface of the case body 12 of the terminal box 1. Since the air flowing through the air vent hole 16 is discharged to the outside, the potting material is removed from the opening 14 (more specifically, to the back film 125 of the solar cell string 116 in the opening 14, and further to the solar cell string 116. The back film 125 and the bottom of the case body 12 of the terminal box 1 can be reliably filled (to the gap S), and resin sealing without gaps can be performed.

  Although not shown, the external output line fixed to the terminal block 20 can be fixed directly by connecting the connecting end of the external output line to the other end of the terminal block 20 using a rivet or the like. It should be caulked. Thus, the terminal box 1 is attached on the back film 125 of the solar cell string 116, the output lead wire 122a is electrically connected to the terminal block 20, and the external output line is electrically connected to the terminal block 20. By connecting, a solar cell module is produced.

DESCRIPTION OF SYMBOLS 1 Terminal box 11 Box case 12 Case main body 13 Terminal block fixing | fixed part 13a, 13b Terminal block fixing | fixed piece 14 (14a, 14b, 20a) Opening 16 Air vent 20 Terminal block 20b One edge 111 Translucent insulated substrate 115 Sun Battery cell 116 Solar cell string (thin film solar cell string)
117 P-type electrode terminal portion 118 N-type electrode terminal portion 119 Insulating film 120 Positive electrode current collector portion 121 Negative electrode current collector portion 122 Positive electrode lead wire 123 Negative electrode lead wire 122a, 123a Rising terminal portion 122a1 Tip portion 124 Sealing insulating film 125 Back film 124a, 125a Through hole

Claims (6)

A terminal box for electrically connecting the output lead wire connected to the electrode of the solar battery cell and drawn through the back film,
A box case that is placed and fixed on the back film; and a terminal block that electrically connects the output lead wires formed on the box case. The box case is further placed on the back film. A case body to be fixed and a terminal block fixing portion for mounting and fixing the terminal block on the upper portion of the case body;
An opening for passing the output lead wire to above the terminal block is formed in series from the bottom surface of the case body to the upper surface of the terminal block. The terminal box according to claim 1,
The terminal box, wherein the opening formed in the case body is formed of a tapered through hole that gradually expands from a side communicating with the terminal block fixing portion toward a bottom surface of the case body. In the terminal box according to claim 1 or 2,
One terminal portion of the terminal block is provided so as to protrude from the terminal block fixing portion so that a tip end portion of the output lead wire can be bent and locked. In the terminal box of any one of Claim 1 to Claim 3,
The terminal block fixing portion is formed by a pair of terminal block fixing pieces erected at a predetermined interval in the front-rear direction of the case body, and the output lead wire is passed between the terminal block fixing pieces. A terminal box characterized by having an opening. In the terminal box according to any one of claims 1 to 4,
An air vent hole extending from the bottom surface to the top surface of the case body is provided in the case body. A solar cell module comprising a terminal box that is electrically connected to an output lead wire connected to an electrode of a solar cell and drawn through a back film,
The terminal box includes a box case that is placed and fixed on the back film, and a terminal block that electrically connects the output lead wire formed on the box case, and the box case further includes: It consists of a case main body placed and fixed on the back film, and a terminal block fixing portion for mounting and fixing the terminal block on the upper portion of the case main body,
An opening for passing the output lead wire to above the terminal block is formed in a series from the bottom surface of the case body to the upper surface of the terminal block.

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