JP2012248639A - Conductive film affixation unit and solar battery module assembling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assemble a solar battery module capable of reducing distortion of a cell due to thermal expansion and reducing the cost of an adhesive agent, at a low cost, without decreasing characteristics of the adhesive agent.SOLUTION: A conductive film affixation unit 103, which affixes a conductive film 3 to a solar battery cell 1 or an electric wire 2, comprises a cutting mechanism and an affixation head 133. The cutting mechanism cuts a tape-shaped conductive film 3 into a plurality of pieces in a predetermined length in a longitudinal direction. The affixation head 133 affixes the pieces of the conductive film 3 cut by the cutting mechanism to the solar battery cell 1 or the electric wire 2 in a plurality of batches.

Description

  The present invention relates to a conductive film pasting unit for connecting a solar battery cell and an electric wire through a conductive layer of a conductive film, and a solar cell module assembling apparatus provided with the conductive film pasting unit.

  For example, in the crystalline solar cell module assembly process, a cell substrate (hereinafter simply referred to as “cell”) of a solar cell such as a single crystal solar cell or a polycrystalline solar cell is connected to a wiring member to form a series of solar cell circuits. And a step of attaching an external terminal by sealing with a protective sheet or the like.

  Conventionally, soldering has been widely used as a method for connecting a wiring member to a cell. For soldering, the soldering is performed by pressing the soldering iron while pressing the soldering iron over the entire surface of the cell surface (manual soldering), and several heating pins are pressed against the cell surface partially. Soldering using a machine for soldering (mechanical soldering) has been used. Manual soldering required the skill of the operator to quickly slide the soldering iron over the entire length of the electrode and join before the thermal expansion became severe, and there was concern about stable production. For this reason, in machine soldering using a machine, a method of soldering a plurality of locations simultaneously and in a short time is common.

  In recent years, in order to reduce the amount of expensive silicon crystals used for the purpose of reducing the cost of solar cells, cell substrates have been made thinner. For example, in the past, the thickness of a cell, which was usually about 400 μm, has been reduced to about 160 μm in recent years. For this reason, the cell of a solar cell is weaker than before. Furthermore, with the recent increase in environmental awareness, the conventional tin-lead crystal solder (melting point 183 degrees) is being replaced by a high-melting-point lead-free solder typified by tin-silver-copper solder (melting point around 220 degrees).

  From both of these changes, the strain due to the difference in thermal expansion applied to the cell tends to increase, and defects such as cell warpage, solder peeling, and cell damage tend to increase. For this reason, a method for avoiding a decrease in reliability due to a difference in thermal expansion is known by connecting a wire and a cell using a conductive film or an anisotropic conductive film (conductive layer: Anisotropic Conductive Film). (See Patent Document 1).

  In the technique using the conventional conductive film or anisotropic conductive film, it can be bonded to the electronic component at a lower temperature than the conventional solder bonding, so that the stress due to thermal expansion can be reduced, and the elastic modulus can be reduced. Since it is small, it can be connected with low stress, and defects in electronic components can be greatly reduced. Here, the commercially available anisotropic conductive film can be bonded at a temperature of about 160 to 180 degrees and lower than that of lead-free solder, although the temperature of thermocompression bonding depends on the product.

JP 2008-300403 A

  However, in the prior art described in Patent Document 1, the entire process is uniformly performed so as to illustrate heating and pressurization for 15 seconds at a temperature of 180 ° C. and a pressure of 2 MPa. Therefore, it cannot be said that the temperature is sufficiently low compared with the melting point of 183 degrees of conventional lead solder. In addition, since the paste is applied as a whole, the wire made of copper foil is thermally expanded and pasted, and when the adhesive is cured and cooled to room temperature, it gives strain to the cell due to the difference in thermal expansion. Is the same as lead solder. It is also effective to lower the curing temperature by changing the formulation of the adhesive, but if the curing temperature is lowered, problems such as faster deterioration of the adhesive or longer heating time required for curing, The effect of distortion reduction was limited.

  To compensate for this, even if the conventional mechanical soldering device is used to divide the crimped part into a plurality of locations and pressurize with a heating pin, the commercially available anisotropic conductive film is in comparison with solder. Since it is expensive, it has a problem that when it is pasted on the surface of the electric wire, the manufacturing cost becomes high.

  An object of the present invention is to provide a solar cell module capable of reducing distortion of a cell due to thermal expansion and reducing the cost of the adhesive without deteriorating the characteristics of the adhesive in consideration of the actual situation in the prior art. It is providing the assembly apparatus of the electroconductive film sticking unit and solar cell module which can be assembled at low cost.

In order to solve the above problems and achieve the object of the present invention, the conductive film sticking unit of the present invention is a conductive film sticking unit for sticking a conductive film to a solar cell or an electric wire, and includes a cutting mechanism, A pasting head.
The cutting mechanism cuts the tape-like conductive film into a predetermined length shorter than the length of the solar battery cell in the longitudinal direction. And a sticking head sticks the piece-like electroconductive film cut | disconnected by the cutting mechanism to a photovoltaic cell or an electric wire in multiple times.

Moreover, the solar cell module assembling apparatus of the present invention is a conductive material in which a tape-like conductive film having a conductive layer and a separator stacked on one surface of the conductive layer is attached to at least one of the solar cell and the electric wire. A film pasting unit; and a crimping unit that crimps the solar battery cell and the electric wire through the conductive layer.
The conductive film sticking unit described above is used as the conductive film sticking unit.

  According to the conductive film pasting unit and the solar cell module assembling apparatus having the above configuration, the amount of the conductive film used can be reduced by attaching the conductive film cut into a plurality of times to the cell or the electric wire, Cost can be reduced. Furthermore, since the portion where the electric wire is attached to the cell is intermittently arranged by the conductive film, the thermal stress can be relaxed at the portion where the electric wire is not attached. As a result, the distortion of the cell can be reduced, and the occurrence of problems such as the cracking of the cell, the breakage of the connection portion, and the peeling of the electric wire can be reduced.

It is a top view which shows the whole structure of the 1st Example of the solar cell module assembly apparatus of this invention. It is an elevation view for demonstrating the process of affixing the electroconductive film in the 1st Example of the solar cell module assembly apparatus of this invention on a cell. It is an elevation for demonstrating the process of connecting the cell and electric wire in the 1st Example of the solar cell module assembly apparatus of this invention. It is a schematic block diagram which shows 1st Embodiment of the electroconductive film sticking unit concerning the solar cell module assembly apparatus of this invention. It is a schematic block diagram which shows 2nd Embodiment of the electroconductive film sticking unit concerning the solar cell module assembly apparatus of this invention. It is a schematic block diagram which shows the 3rd Embodiment of the electroconductive film sticking unit concerning the solar cell module assembly apparatus of this invention. It is a perspective view which shows the example of the structure of the photovoltaic cell string assembled by the solar cell module assembly apparatus of this invention.

  Hereinafter, embodiments of the solar cell module assembling apparatus of the present invention will be described with reference to FIGS. 1 to 6. In order to help understanding at that time, representative solar cells (hereinafter simply referred to as “cells”). The structure of the cell string 4 will be described with reference to FIG.

[Cell string]
The cell 1 shown in FIG. 7 has electrode patterns on the front and back. Four wires 2 are attached to the front and back of the cell 1. The four electric wires 2 are attached to the front and back of each cell 1 by attaching a conductive film (not shown) to several locations of the cell 1 or the electric wires 2.

  The cell string 4 is configured by connecting, for example, ten cells 1 by electric wires 2. The solar cell module includes a plurality of cell strings 4, a transmissive glass and a back sheet that sandwich the plurality of cell strings 4.

  The cell string 4 shown in FIG. 7 is configured by connecting the cells 1 using four electric wires. The number of the cells 1, the number of the electric wires 2, the number and the length of the conductive films are as follows. This should be determined by the design of the battery module. In other words, in the cell string according to the present invention, it is of course possible to freely change the number of the electric wires 2 or to separately determine the connection location on the front and back sides.

1. First Embodiment [Solar Cell Module Assembly Device]
Next, a solar cell module assembly apparatus will be described with reference to FIGS.
FIG. 1 is a plan view showing the overall configuration of a first embodiment of the solar cell module assembling apparatus (hereinafter referred to as “this example”). FIG. 2 is an elevation view for explaining the process of attaching the conductive film 3 to the cell 1, and FIG. 3 is an elevation view for explaining the process of connecting the cell 1 and the electric wire 2.

  In the solar cell module assembling apparatus 100 of the present example, an electric wire supply unit 101, an electric wire straightening unit 102, and an electric wire cutting unit 104 are arranged in order from the left side in the lower part of FIG. Moreover, the cell supply unit 105 and the conductive film sticking unit 103 are arrange | positioned as a unit which performs the process which sticks a conductive film to the cell 1 in the upper stage part of FIG.

  Further, on the right side (rear) of the lower stage of FIG. 1, a preheating and provisional pressure bonding unit 107 that joins and preheats the electric wire 2 to the cell 1, a main crimping unit 108 that crimps the cell 1 and the electric wire 2, and a final pressure bonding are provided. A cooling unit 109 for cooling the cell 1 is arranged. Next to the cooling unit 109, a transfer device 110 is arranged for pulling out the cell strings 4 (see FIG. 7) connected in a chain form from the cooling unit 109 and delivering them to the next step 120.

  In the solar cell module assembling apparatus 100 configured as described above, first, an electric wire (not shown) is supplied from the electric wire supply unit 101, and the distortion generated during the electric wire transportation is corrected by the electric wire correction unit 102. That is, since the flat electric wire sent from the electric wire supply unit 101 is wound around a reel (not shown), for example, it has a restoring force that deforms so as to be bent. Therefore, the electric wire straightening unit 102 has a mechanism for forcibly removing the curl generated in the flat electric wire by this restoring force.

  In FIG. 1, the specific configuration of the electric wire straightening unit 102 is not shown. However, in the electric wire straightening unit 102, for example, a dancer roller is disposed between two supplied feed rollers against the bending of the electric wire 2. The wire 2 is given appropriate tension against the restoring force of the wire 2. That is, the electric wire correction unit 102 corrects curl generated on the electric wire while maintaining this tension.

  The electric wire 2 whose curl has been corrected by the electric wire correction unit 102 is sent to the electric wire cutting unit 104. The wire cutting unit 104 cuts the wire 2 to a length that is an integral multiple of the length of the cell 1 (here, approximately twice). As shown in FIG. 3, in the wire cutting unit 104, the tip of the wire drawn into the unit is received by the chuck 142, and the wire is cut from above and below by a cutting blade (not shown).

  On the other hand, as shown in FIG. 2, the cell 1 is supplied from the cell supply unit 105 in a state of being stacked on the tray, and is conveyed to the conductive film pasting unit 103. The conductive film affixing unit 103 affixes a small piece of the conductive film 3 (hereinafter referred to as “conductive film” including the small piece) to a predetermined portion of the supplied cell 1. wear.

  The conductive film 3 includes a separator 3a and a conductive layer 3b laminated on the separator 3a. The conductive layer 3b is formed in a tape shape by dispersing fine metal particles having conductivity in a thermosetting resin (binder resin) made of an adhesive electrical insulating material (see FIG. 4). And the conductive film 3 is affixed on the cell 1 in the state which peeled the separator 3a from the conductive layer 3b (refer FIG. 4).

  Thereafter, the cell 1 to which the conductive film 3 is attached is sent to the preheating and provisional pressure bonding unit 107 in that state. And in the preheating and pre-crimp unit 107, the cell 1 sent from the electroconductive film sticking unit 103 and the electric wire 2 cut | disconnected by the wire cutting unit 104 are joined, and pre-heating and pre-crimp are carried out.

  In the main crimping unit 108, thermocompression bonding is performed in a state where the electric wire 2 and the cell 1 are integrated, and the chained cell string 4 (see FIG. 7) is sequentially drawn out to the cooling unit 109. Thereafter, the cell string 4 is delivered to the next step 120 by the transfer device 110.

Next, the cell supply unit 105 and the conductive film pasting unit 103 will be described with reference to FIGS.
FIG. 4 is a schematic configuration diagram showing the conductive film sticking unit 103.

  As shown in FIG. 2, the cell supply unit 105 includes a cell tray 151 in which a plurality of cells 1 are stacked, an elevator 152, a suction head 153, and a transfer mechanism 154.

  The cell tray 151 is maintained by the elevator 152 so that the height of the surface of the uppermost cell 1 is constant. Then, the uppermost cell 1 is sucked by the suction head 153, and is transferred onto the belt conveyor 155 by the transfer mechanism 154 and conveyed one by one to the conductive film pasting unit 103. At this time, when the uppermost cell 1 is carried by the transfer mechanism 154, the elevator 152 rises. Thereby, the height of the surface of the cell 1 arranged on the uppermost surface in the cell tray 151 is controlled so as to be always constant.

  The conductive film sticking unit 103 includes a first conductive film sticking part 103A for sticking the conductive film 3 to the surface of the cell 1, and a second conductive film sticking part 103B for sticking the conductive film 3 to the back surface of the cell 1. And have. Since the first conductive film sticking part 103A and the second conductive film sticking part 103B have the same configuration, only the first conductive film sticking part 103A will be described here.

  As shown in FIG. 4, the first conductive film sticking portion 103A winds the supply reel 132 around which the conductive film 3 is wound, the sticking head 133 that sticks the conductive layer 3b to the cell 1, and the separator 3a. A collection reel 134 and a base member 135 are provided. Further, the first conductive film attaching portion 103 </ b> A has a dancer roll 136 that pulls out the conductive film 3 from the conductive film 3 wound around the supply reel 132.

  The supply reel 132 is detachably attached to the base member 135 via the rotation shaft 139. The supply reel 132 is rotatably supported on the rotation shaft 139. The conductive film 3 is wound around the supply reel 132. Note that a recovery reel 134, a first horizontal guide roller 137, a second horizontal guide roller 138, and a dancer roll 136 are attached to the base member 135.

  The conductive film 3 is guided to a pasting position in the pasting head 133 by the first horizontal guide roller 137 and the second horizontal guide roller 138. The first horizontal guide roller 137 is disposed upstream of the cell 1 in the transport direction of the cell 1 in the pasting head 133, and the second horizontal guide roller 138 is disposed downstream of the cell 1 in the transport direction of the cell 1 in the pasting head 133. Yes.

  And the 1st horizontal guide roller 137 hold | maintains the longitudinal direction one end part of the electroconductive film 3 stuck on the cell 1, and the 2nd horizontal guide roller 138 is the longitudinal direction of the electroconductive film 3 stuck on the cell 1. The other end of the direction is held. Thus, the conductive film 3 is held substantially horizontally at the pasting position in the pasting head 133 by the first horizontal guide roller 137 and the second horizontal guide roller 138.

  A collection reel 134 is disposed on the downstream side of the travel path of the conductive film 3 in the second horizontal guide roller 138. Similar to the supply reel 132, the collection reel 134 is rotatably supported by the rotation shaft 130 and is attached to the base member 135. And this collection | recovery reel 134 winds up the separator 3a peeled from the conductive layer 3b, and collect | recovers the separator 3a.

  A dancer roll 136 is provided between the second horizontal guide roller 138 and the collection reel 134. The dancer roll 136 includes a swing arm 136a and a feed roller 136b. The swing arm 136a is swingably supported by the base member 135, and a feed roller 136b is provided at the tip thereof. The feed roller 136b guides the separator 3a that is the used conductive film 3 fed from the second horizontal guide roller 138.

  The dancer roll 136 has a predetermined length of feed of the conductive film 3 and is electrically conductive by pulling a swing arm 136a that guides the conductive film 3 with a predetermined force by a spring or a weight. A predetermined tensile force is applied to the film.

  Moreover, the sticking head 133 is comprised from the receiving blade not shown, the pressurization blade arrange | positioned facing the receiving blade in the perpendicular direction, and the drive part. This sticking head 133 sticks the conductive layer 3b of the conductive film 3 to the cell 1 one by one with the cell 1 and the conductive film 3 disposed between the receiving blade and the pressure blade interposed therebetween. Here, the conductive film 3 is half-cut for each length shorter than the length of the cell 1 by a half-cut mechanism described later.

  The receiving blade and the pressure blade are disposed so as to be sandwiched between the first horizontal guide roller 137 and the second horizontal guide roller 138. The pressure blade is supported by the drive unit so as to be movable up and down. The pressure blade incorporates a heater (not shown) for heating the pressure blade. Thereby, the pressure blade heated by the heater comes into contact with the conductive film 3, so that the resin of the conductive layer 3b is softened. Thereafter, the pressure blade is separated from the cell 1, and the separator 3a is peeled off from the conductive layer 3b. In this way, the conductive layer 3b is attached to the cell 1.

  Between the sticking head 133 and the first horizontal guide roller 137, a half cut mechanism (not shown) which is a cutting mechanism is provided. This half-cut mechanism includes a movable cutter and a cutter receiver. Then, the conductive film 3 is half cut by a movable cutter of a half cut mechanism. Here, half-cut means a state in which only the conductive layer 3b of the conductive film 3 is cut and the separator 3a is not cut by sandwiching the conductive film 3 between the cutter and the cutter receiving portion. By performing this half-cutting, the half-cut position of the conductive film 3 becomes the pasting end position, and the end of the conductive layer 3b pasted last time becomes the pasting start position. The sticking length is shorter than the cell 1 as described above.

  In the present example, the example in which the conductive film 3 is half-cut in the conductive film pasting unit 103 and only the conductive layer 3b of the conductive film 3 is pasted to the cell 1 has been described. However, the present invention is not limited thereto. Absent. For example, in the conductive film 3, the conductive film 3 is cut to a length shorter than the length of the cell 1, so-called full cut, and the conductive film 3 is bonded to the separator 3 a with the conductive film 3. 1 may be attached. Moreover, when sticking the conductive layer 3b with the separator 3a, it is preferable to provide the separator peeling unit which peels the separator 3a from the conductive layer 3b.

  Further, in the sticking head 133 of the conductive film sticking unit 103 of this example shown in FIG. 4, the conductive layers 3b are stuck one by one. However, the sticking head can attach two or more conductive layers 3b at a time. 133 may be configured.

Next, the preheating and provisional pressure bonding unit 107, the main pressure bonding unit 108, the cooling unit 109, and the transfer device 110 will be described with reference to FIG.
FIG. 3 is an elevation view for explaining a process of connecting the cell 1 and the electric wire 2.

  As shown in FIG. 3, the preheating / temporary pressure bonding unit 107 includes a belt conveyor 171, a preheating heater 172 built in the belt conveyor 171, and two temporary pressure bonding heads 173 that move up and down.

  On the belt conveyor 171, the cell 1 with the conductive layer 3 b of the conductive film 3 is placed, and the first half of the electric wire 2 cut by the wire cutting unit 104 on the placed cell 1 in the transport direction. Can be placed. Moreover, the belt conveyor 171 draws the placed cell 1 and the electric wire 2 downstream in the transport direction. Thereafter, the cell 1 having the conductive layer 3b of the conductive film 3 attached thereon is placed on the latter half of the electric wire 2 in the transport direction.

  The two temporary press-bonding heads 173 temporarily move the electric wire 2 and the cell 1 placed on the belt conveyor 171 by moving up and down. Then, the conductive layer 3 b of the conductive film 3 attached to the cell 1 is preheated by the preheater 172 to increase the adhesiveness, and is pressurized by the temporary pressure bonding head 173. As a result, the conductive film 3 is attached to the cell 1, and the cell 1 is connected in a string shape by the electric wire 2.

  In the preheating and provisional pressure bonding unit 107 shown in FIG. 3, two cells are preheated simultaneously, but the number of cells is not limited to two. Depending on the length of the line, three or more cells can be preheated simultaneously, depending on the user's design specifications.

  The two cells 1 connected in a string form with the electric wire 2 by preheating and pre-crimping in the pre-crimping unit 107 are sent to the main crimping unit 108.

  The main pressure bonding unit 108 includes a heating stage 181, a heating and pressing head 185, a pressing mechanism 187 that drives the heating and pressing head 185 up and down, and a moving mechanism (not shown). The heating stage 181 and the heating and pressing head 185 constitute the heating and pressing unit of the present invention.

  The heating and pressurizing head 185 is disposed to face the heating stage 181 while being supported by the pressurizing mechanism 187 so as to be movable up and down. Further, the heating and pressing head 185 faces the cell 1 and the electric wire 2 placed on the heating stage 181.

  The heating stage 181 and the heating / pressurizing head 185 incorporate a heater (not shown). This heater rises to a temperature at which the conductive layer 3b of the conductive film 3 is thermally cured. The heating / pressurizing head 185 and the heating stage 181 can heat and pressurize two cells 1 at a time. Further, the heating stage 181 and the heating / pressurizing head 185 are supported by a moving mechanism (not shown) so as to be movable, and reciprocate along the transport direction of the cell 1.

  Here, the heating / pressurizing head 185 reduces the temperature rise of the wire unnecessary for the pressure heating by denting the portion without the conductive layer 3b in advance, and further increases the temperature of the unnecessary portion. It is possible to reduce the distortion of the cell 1 at the time of cooling by letting the drink by the thermal expansion caused by the slack and escape.

  Further, in the main crimping unit 108, as shown by the arrow in FIG. 3, the two cells 1 are carried to the position of the right dotted line while being pressed between the heating stage 181 and the heating / pressurizing head 185. It is. When the cell 1 reaches the right dotted line position, the heating stage 181 and the heating / pressurizing head 185 are separated from the cell 1 and returned to the position indicated by the solid line on the left side. Arranged on the upper and lower sides.

  The conductive film 3 is thermoset by the main pressing unit 108, and the cell 1 and the electric wire 2 are finally pressed. The wire 2 and the cell 1 that are finally crimped in the final crimping unit 108 are fed into the cooling unit 109.

  The cooling unit 109 has a conveyor 191 and a slow cooling heater 192 built in the conveyor 191. The suction head 111 of the transfer device 110 faces the conveyor 191. The cooling unit 109 naturally cools the cell string 4 including the cells 1 and the electric wires 2 until a specified number of cells 1 are connected.

  The transfer device 110 includes a suction head 111 and a transfer mechanism 112 that supports the suction head 111 so as to be movable up and down. The suction head 111 sucks the cell string 4 to which a predetermined number of cells 1 are connected and naturally cooled by the cooling unit 109. The transfer mechanism 112 sends the cell string 4 sucked by the suction head 111 to the next step 120 shown in FIG.

  In addition, in this example, although the example which heated and pressurized two cells 1 at once was demonstrated, the number of the cells heated and pressurized at once by this crimping | compression-bonding unit 108 is not limited to this, One piece or three or more pieces may be heated and pressurized simultaneously. Furthermore, although the example which comprised the heating stage 181 and the heating-and-pressurization head 185 so that reciprocation was possible along the conveyance direction of the cell 1 by the moving mechanism not shown was demonstrated, it is not limited to this. For example, the heating stage 181 and the heating / pressurizing head 185 may not be moved in the transport direction of the cell 1 without providing a moving mechanism.

[Operation of conductive film pasting unit]
Next, operation | movement of the electroconductive film sticking unit 103 which has the structure mentioned above is demonstrated with reference to FIG.2 and FIG.4.

  As shown in FIG. 2, the cells 1 are carried one by one from the cell supply unit 105 to the conductive film pasting unit 103 by the belt conveyor 155. As shown in FIG. 4, the first conductive film sticking part 103 </ b> A of the conductive film sticking unit 103 faces the surface of the cell 1, and the second conductive film sticking part 103 </ b> B faces the back surface of the cell 1. To do.

  The dancer roll 136 is driven to pull out a predetermined amount of the conductive film 3 from the supply reel 132. Then, the conductive film 3 is half-cut by a not-shown half-cut mechanism, and a plurality of conductive layers 3b of the conductive film 3 have a predetermined width (length shorter than the length of the cell 1) along the longitudinal direction. Cut into individual pieces. Next, the sticking head 133 is driven, and the conductive layer 3 b of the conductive film 3 cut into pieces is stuck to the cell 1.

  That is, the conductive layer 3b is stuck on the surface of the cell 1 by the sticking head 133 of the first conductive film sticking part 103A, and the conductive layer 3b is stuck on the back surface of the cell 1 by the sticking head 133 of the second conductive film sticking part 103B. To do. Note that the conductive layer 3b may be attached simultaneously on both sides of the cell 1, or one side of the cell 1 may be attached.

  Next, the cell 1 is moved by a predetermined amount in the carrying direction or the width direction of the cell 1 orthogonal to the carrying direction by a moving mechanism (not shown). And the conductive layer 3b is affixed on the surface and the back surface of the cell 1 by the 1st conductive film sticking part 103A and the 2nd conductive film sticking part 103B again. In this way, the conductive layer 3b of the conductive film 3 is applied to the front and back surfaces of the cell 1 sequentially in a plurality of times. By dividing the conductive film 3 into a plurality of pieces and attaching them to the cell 1, the amount of the conductive film 3 used can be reduced, and the cost can be reduced.

  Furthermore, since the portion where the electric wire 2 is attached to the cell 1 is intermittently arranged, the thermal stress can be relaxed at the portion where the electric wire 2 is not attached. As a result, the distortion of the cell 1 can be reduced, and the occurrence of problems such as cracking of the cell 1, breakage of the connection portion, peeling of the electric wire 2 can be reduced.

  In addition, although the example which moved the cell 1 was demonstrated in this example, it is not limited to this. For example, the cell 1 is fixed to the conductive film sticking unit 103, and the first conductive film sticking part 103A and the second conductive film sticking part 103B are moved to the next sticking position for each sticking operation of the sticking head 133. Then, the conductive film 3 may be attached. That is, it is only necessary to move the cell 1 or at least one of the first conductive film sticking part 103A and the second conductive film sticking part 103B to the next sticking position and relatively change the positional relationship between them.

  Moreover, since the sticking head 133 of the first conductive film sticking part 103A and the second conductive film sticking part 103B described above sticks the conductive layers 3b one by one, the plurality of conductive layers 3b are put together. The structure is simpler than the sticking head for sticking. Therefore, a plurality of first conductive film sticking portions 103A and second conductive film sticking portions 103B can be provided, and the number of conductive films 3 that can be stuck at a time can be increased. Thereby, the tact balance with other units can be made uniform.

2. Second Embodiment Next, a second embodiment of the solar cell module assembling apparatus of the present invention will be described with reference to FIG.
FIG. 5: is a schematic block diagram which shows the electroconductive film sticking unit concerning the 2nd Example of the solar cell module assembly apparatus of this invention. Here, the conductive film pasting unit will be described, and the same reference numerals are given to portions common to the solar cell module assembling apparatus 100 according to the first embodiment, and redundant description will be omitted.

  As shown in FIG. 5, the conductive film sticking unit 203 of the solar cell module assembling apparatus 200 according to the second embodiment has a first conductive film sticking part 203A. Since this first conductive film sticking portion 203A has the same configuration as that of the conductive film sticking unit 103 according to the first embodiment, common portions are denoted by the same reference numerals and duplicated. Description is omitted.

  The first conductive film sticking portion 203 </ b> A first sticks the conductive layer 3 b of the conductive film 3 to the surface of the cell 1. And the front half part of the electric wire 2 is connected to the surface of the cell 1 through this conductive layer 3b. From the next, the first conductive film sticking part 203 </ b> A sticks the conductive layer 3 b to the surface of the electric wire 2. Then, the cell 1 is placed on the surface of the electric wire 2 to which the conductive layer 3b is attached, and the cell 1 and the electric wire 2 are connected.

  Since other configurations are the same as those of the solar cell module assembling apparatus 100 according to the first embodiment described above, description thereof will be omitted. Also with the solar cell module assembly apparatus 200 having such a configuration, the same operations and effects as those of the solar cell module assembly apparatus 100 according to the first embodiment described above can be obtained.

3. Third Embodiment Next, a third embodiment of the solar cell module assembling apparatus of the present invention will be described with reference to FIG.
FIG. 6: is a schematic block diagram which shows the electroconductive film sticking unit concerning the 3rd Example of the solar cell module assembly apparatus of this invention. Here, the conductive film pasting unit will be described, and the same reference numerals are given to portions common to the solar cell module assembling apparatus 100 according to the first embodiment, and redundant description will be omitted.

  As shown in FIG. 6, the conductive film sticking unit 303 of the solar cell module assembling apparatus 300 according to the third embodiment sticks the conductive film 3 to the electric wire 2. The conductive film sticking unit 303 includes a first conductive film sticking part 303 </ b> A that faces the surface of the electric wire 2 and a second conductive film sticking part 303 </ b> B that faces the back surface of the electric wire 2. In addition, since this 1st conductive film sticking part 303A and the 2nd conductive film sticking part 303B have the structure similar to the conductive film sticking unit 103 concerning 1st Embodiment, it is a common part. Are denoted by the same reference numerals, and redundant description is omitted.

  303 A of 1st electroconductive film sticking parts are arrange | positioned at the latter half part side (upstream side) of the conveyance direction in the cut electric wire 2, and the 2nd electroconductive film sticking part 303B is the conveyance direction in the cut electric wire 2. It is arrange | positioned at the front half part side (downstream side). And the 1st conductive film sticking part 303A sticks the conductive layer 3b of the conductive film 3 on the surface of the latter half part of the conveyance direction in the electric wire 2. FIG. Moreover, the 2nd electroconductive film sticking part 303B sticks the electroconductive layer 3b of the electroconductive film 3 on the back surface of the front half part of the conveyance direction in the electric wire 2. FIG.

  Then, the electric wire 2 to which the conductive layer 3b is attached is transported to the preheating and provisional pressure bonding unit 107 and connected to the cell 1.

  Since other configurations are the same as those of the solar cell module assembling apparatus 100 according to the first embodiment described above, description thereof will be omitted. Also with the solar cell module assembly apparatus 300 having such a configuration, the same operations and effects as those of the solar cell module assembly apparatus 100 according to the first embodiment described above can be obtained.

  The embodiment of the solar cell module assembling apparatus of the present invention has been described above, including its effects. However, the solar cell module assembling apparatus of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention described in the claims. . For example, without providing the preheating and temporary pressure bonding unit, not only the pressure bonding unit but also the preheating and temporary pressure bonding may be performed.

  DESCRIPTION OF SYMBOLS 1 ... Cell (solar cell), 2 ... Electric wire, 3 ... Conductive film, 4 ... Cell string, 100, 200, 300 ... Solar cell module assembly apparatus, 101 ... Electric wire supply unit, 102 ... Electric wire correction unit, 103, DESCRIPTION OF SYMBOLS 203,303 ... Electroconductive film sticking unit, 104 ... Electric wire cutting unit, 105 ... Cell supply unit, 107 ... Preheating and temporary crimping | compression-bonding unit, 108 ... Main crimping unit (crimping unit), 109 ... Cooling unit, 110 ... Transfer equipment 103A, 203A, 303A ... first conductive film sticking part, 103B, 303B ... second conductive film sticking part, 132 ... supply reel, 133 ... sticking head, 134 ... recovery reel, 136 ... dancer roll

Claims (8)

A conductive film sticking unit for sticking a conductive film to a solar cell or electric wire,
A cutting mechanism for cutting the tape-like conductive film into a predetermined length in the longitudinal direction;
Affixing head for affixing the plurality of pieces of the conductive film cut by the cutting mechanism to the solar cell or the electric wire in a plurality of times;
Conductive film pasting unit equipped with. Each time the sticking head sticks the conductive film to the solar battery cell or the electric wire, the sticking head is attached to the solar battery cell or the electric wire at the next sticking position where the conductive film is stuck in a plurality of times. The conductive film sticking unit according to claim 1 which moves. The solar cell or the electric wire is divided into a plurality of times for each operation of applying the conductive film by the application head, and the conductive cell is attached to the solar cell or the electric wire at the next application position. The conductive film sticking unit according to claim 1 which moves. The conductive film has a conductive layer connecting the solar battery cell and the electric wire, and a separator superimposed on one surface of the conductive layer,
The cutting mechanism cuts only the conductive layer in the conductive film,
The conductive film sticking unit according to claim 1, wherein the sticking head sticks only the conductive layer from the conductive film to the solar battery cell or the electric wire. A supply reel on which the conductive film is wound;
The conductive film sticking unit according to claim 4, further comprising: a recovery reel in which the conductive layer is stuck to the solar battery cell or the electric wire, and the separator from which the conductive layer is peeled off is collected from the conductive film. . The conductive film sticking unit according to claim 1, wherein a plurality of the sticking heads are provided. A conductive film affixing unit that affixes a tape-shaped conductive film having a conductive layer and a separator superimposed on one surface of the conductive layer to at least one of the solar cell and the electric wire;
A crimping unit that crimps the solar battery cell and the electric wire via the conductive layer,
The conductive film sticking unit is
A cutting mechanism for cutting the tape-like conductive film into a predetermined width along the longitudinal direction;
Affixing head for affixing the conductive film cut by the cutting mechanism to the solar battery cell or the electric wire in a plurality of times;
A solar cell module assembling apparatus. The solar cell module assembling apparatus according to claim 7, further comprising a moving mechanism for moving the pasting head, the solar battery cell, or the electric wire for each pasting operation of the conductive film by the pasting head.

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