JP2011082294A - Semiconductor cell, solar cell module, lead wire connection device and connection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar cell module in which semiconductor cells connected by lead wires through adhesive conductive tapes can be easily connected at a low cost. <P>SOLUTION: The solar cell module has a plurality of semiconductor cells connected in array by lead wires, and each of the semiconductor cells has a plurality of finger electrodes formed on one surface as a light reception surface in parallel at predetermined intervals in a predetermined direction and also has a conductive metal film provided on the other surface, except an exposed part, at one end part and the other end part in a direction crossing the plurality of finger electrodes. One end part of each lead wire is connected to one surface of one of a pair of adjacent semiconductor cells in the direction crossing the plurality of finger electrodes, and the other end part of the lead wire is connected to the other surface of the other semiconductor cell through the adhesive conductive tape, at positions corresponding to removal parts formed at one end part and the other end part of the other surface. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure of a semiconductor cell, a solar cell module in which the semiconductor cells are connected in a row with lead wires, and a lead wire connection device and a connection method for connecting a plurality of semiconductor cells in a row with lead wires.

  Solar cells include crystal types and thin film types. A crystal type solar cell is formed by connecting a plurality of semiconductor cells such as single crystal silicon and polycrystalline silicon into a string by connecting them with a lead wire, and laminating the string on a glass substrate integrally with a resin. The Such a solar cell module is disclosed in Patent Document 1.

  A plurality of finger electrodes are provided at predetermined intervals in a predetermined direction on the surface serving as a light receiving surface of the semiconductor cell. Further, the light receiving surface is provided with a plurality of light receiving surface side bus bar electrodes in a direction intersecting with the arrangement direction of the plurality of finger electrodes.

  A conductive metal film made of, for example, aluminum is provided on the entire back surface of the semiconductor cell, and the same number of back-side busbar electrodes are provided on the conductive metal film along the same direction as the front surface side of the semiconductor cell. Yes.

  Then, in a pair of adjacent semiconductor cells, one end of the lead wire is connected and fixed to the end portion of the light-receiving surface side bus bar electrode provided on the surface of one semiconductor cell by solder, and the other end of the lead wire is connected to the other semiconductor A ring is formed as described above in which a plurality of semiconductor cells are connected in a row by being fixedly connected to the end portion of the backside busbar electrode provided on the backside of the cell by solder.

  As each of the bus bar electrodes, it has been studied to use inexpensive copper, but silver is often used because it improves the bondability with a lead wire.

JP 2008-205137 A

  As described above, if the structure is such that the light-receiving surface side bus bar electrode on the surface of the adjacent semiconductor cell and the back side bus bar electrode on the back surface are connected by solder, a printing process is required to provide the bus bar electrode in the semiconductor cell. It becomes. For this reason, it takes a lot of time to manufacture the semiconductor cell, which causes an increase in cost.

  Furthermore, if the bus bar electrode is made of silver in order to improve the bondability between the bus bar electrode and the lead wire, silver is expensive, which may lead to an increase in cost.

  An object of the present invention is to provide a semiconductor cell capable of forming a string without soldering a lead wire and a solar cell module using the semiconductor cell.

  According to the present invention, a lead wire is not soldered to a plurality of semiconductor cells, and the operation of connecting the lead wires with the lead wires can be automated so that the semiconductor cells are not damaged or deformed or distorted. The object is to provide a line connecting device and a connecting method.

This invention is a semiconductor cell constituting a solar cell module connected in a row by lead wires,
In the semiconductor cell, a plurality of finger electrodes are formed at a predetermined interval with respect to a predetermined direction on one surface serving as a light receiving surface,
A conductive metal film is provided on the other surface, and a removal portion from which the conductive metal film is removed is formed at one end and the other end of the other surface in a direction intersecting the predetermined direction. It is in the semiconductor cell characterized by having.

The present invention is a solar cell module in which a plurality of semiconductor cells are connected in a row by lead wires,
In the semiconductor cell, a plurality of finger electrodes are formed at a predetermined interval with respect to a predetermined direction on one surface serving as a light receiving surface,
The other surface is provided with a conductive metal film leaving an exposed portion at one end and the other end in the direction intersecting with the plurality of finger electrodes,
One end of the lead wire is attached to one surface of one semiconductor cell of a pair of adjacent semiconductor cells among a plurality of semiconductor cells connected in a row, and the plurality of fingers are interposed via an adhesive conductive tape. Connected in a direction crossing the electrode, the other end of the lead wire is attached to the other surface of the other semiconductor cell at a position corresponding to the removal portion formed at one end and the other end of the other surface. The solar cell module is connected via a conductive tape.

The present invention is a lead wire connecting device for connecting a plurality of semiconductor cells in a row with lead wires,
A supply part of the semiconductor cell;
Tape adhering means for simultaneously adhering the adhesive conductive tape cut to a predetermined length on the upper and lower surfaces of the semiconductor cell supplied from the supply unit;
The semiconductor cell with the conductive tape adhered to the upper and lower surfaces by the tape adhering means is supplied, and the conveying means for pitch-feeding the semiconductor cells;
Lead wire processing means for forming the lead wire into a shape that bends in the vertical direction at the middle part in the longitudinal direction;
Conductives provided on the upper and lower surfaces of the semiconductor cells that are pitch-fed while holding lead wires that are formed by the lead wire processing means and are opposed to the semiconductor cells that are pitch-fed by the conveying means. Temporary crimping means for electrically connecting the upper and lower surfaces of the adjacent semiconductor cells alternately by repeating the temporary crimping of the lead wires to the adhesive tape;
The pair of upper and lower lead wires disposed at a position facing the semiconductor cell on the downstream side in the feeding direction of the semiconductor cell by the conveying means than the temporary pressure bonding means and temporarily bonded to the lower surface of the upper surface of the semiconductor cell by the temporary pressure bonding means. It has a main pressure bonding means for performing a final pressure bonding at the same time,
In the semiconductor cell, a plurality of finger electrodes are formed at a predetermined interval with respect to a predetermined direction on one surface serving as a light receiving surface,
The other surface is provided with a conductive metal film leaving an exposed portion at one end and the other end in the direction intersecting with the plurality of finger electrodes,
One end of the lead wire is connected to the plurality of finger electrodes via the conductive tape on one surface of one of the pair of adjacent semiconductor cells among the plurality of semiconductor cells connected in a row. Connected in a crossing direction, the other surface of the other semiconductor cell has the other end of the lead wire at a position corresponding to the one end of the other surface and the removal portion formed at the other end. The lead wire connecting device for a semiconductor cell is characterized in that it is connected via

The present invention is a lead wire connection method for connecting a plurality of semiconductor cells in a row with lead wires,
A step of simultaneously sticking an adhesive conductive tape to the upper and lower surfaces of the semiconductor cell;
One end of the two lead wires and the other end of the other two lead wires are simultaneously temporarily bonded to the conductive tape provided on the upper and lower surfaces of the semiconductor cell, and the upper and lower surfaces of the adjacent semiconductor cells are alternately arranged. Electrically connecting to
Comprising the step of simultaneously press-bonding a pair of upper and lower lead wires temporarily bonded to the upper and lower surfaces of the semiconductor cell,
In the semiconductor cell, a plurality of finger electrodes are formed at a predetermined interval with respect to a predetermined direction on one surface serving as a light receiving surface,
The other surface is provided with a conductive metal film leaving an exposed portion at one end and the other end in the direction intersecting with the plurality of finger electrodes,
One end of the lead wire is connected to the plurality of finger electrodes via the conductive tape on one surface of one of the pair of adjacent semiconductor cells among the plurality of semiconductor cells connected in a row. Connected in a crossing direction, the other surface of the other semiconductor cell has the other end of the lead wire at a position corresponding to the one end of the other surface and the removal portion formed at the other end. In the method of connecting lead wires of a semiconductor cell, the semiconductor device is connected via a semiconductor device.

  According to the present invention, among a plurality of semiconductor cells connected in a row, one surface of the pair of adjacent semiconductor cells and the other surface are connected by the lead wire via the adhesive conductive tape. A plurality of semiconductor cells can be connected in a row by lead wires without soldering.

  According to this invention, the conductive tape is simultaneously attached to the upper surface and the lower surface of the semiconductor cell, and the lead wire temporary pressure bonding and the main pressure bonding to the conductive tape attached to the semiconductor cell are simultaneously performed on the upper surface and the lower surface. I did it.

  For this reason, it is difficult to apply non-uniform pressure and heat to the semiconductor cell during the adhesion of the conductive tape, the temporary crimping of the lead wire, and the final crimping, so that the semiconductor cell can be damaged or deformed or distorted by heat. Can be prevented.

The top view which shows schematic structure of the lead wire connection apparatus of one Embodiment of this invention. The side view of the mount frame in which the sticking table of the tape sticking means was provided. The top view of the mount frame shown in FIG. The side view which shows the tape sticking part which sticks a conductive tape on the upper and lower surfaces of the semiconductor cell supplied to the sticking table. (A), (b) is explanatory drawing when dividing the adhesive tape stuck on the release tape into predetermined length. The figure for demonstrating the order which conveys a semiconductor cell from a supply part to a conveyance means by the 1st, 2nd delivery apparatus. The side view which carried out the partial cross section of the endless belt of a conveyance means. The top view which shows the arrangement | positioning state of the 1st, 2nd upper block which comprises the temporary crimping | compression-bonding means arrange | positioned above a conveyance means and the lead wire processing means of the side. FIG. 3 is a side view showing a partial cross section of a pair of lower block and upper block for temporarily crimping a lead wire to upper and lower surfaces of a semiconductor cell of the present invention. (A) is a figure which shows the state before a lead wire shaping | molding means shape | molds a lead wire, (b) is a figure which shows the state which the lead wire shaping | molding means shape | molds a lead wire. (A)-(f) is the figure which showed sequentially the process of forming a string by connecting a lead wire to a semiconductor cell sequentially. The side view which shows the structure of this crimping | compression-bonding means. The top view which shows the discharge | emission means for discharging | emitting the string made while the semiconductor cell is conveyed by the conveyance means from a conveyance means. The side view of the said discharge means. (A) is a top view of the string which connected the semiconductor cell with the lead wire, (b) is the side view to which a part of string was expanded. (A) is a top view of the surface used as the light-receiving surface of a semiconductor cell, (b) is a top view of the back surface of a semiconductor cell. The top view of the back surface of the semiconductor cell which shows 2nd Embodiment of this invention. The top view of the back surface of the semiconductor cell which shows the 3rd Embodiment of this invention. The top view of the back surface of the semiconductor cell which shows 4th Embodiment of this invention.

A first embodiment of the present invention will be described below with reference to FIGS.
First, a schematic configuration of the entire apparatus will be described. FIG. 1 is a plan view showing a schematic configuration of a lead wire connecting device, and this connecting device includes a rectangular plate-like base member 11. On the upper surface of the base member 11, the supply portion 12 of the semiconductor cell 1 from one end to the other end in the longitudinal direction, the tape adhering means 13 for adhering the conductive tape 3 to the upper and lower surfaces of the semiconductor cell 1, Conveying means 14 for intermittently pitch-conveying the semiconductor cells 1 having the conductive tape 3 attached to the upper and lower surfaces by the tape attaching means 13 is sequentially arranged.

  Three lead wire processing means for forming a lead wire 2 for connecting a plurality of semiconductor cells 1 sequentially supplied to the transport means 14 in a row on the side of one end of the transport means 14 in a crank shape. 15a to 15c are arranged.

  The lead wire 2 formed into a crank shape by the lead wire processing means 15 a to 15 c is a semiconductor cell 1 that is transported by the transport means 14 by a temporary crimping means 15 disposed above one end of the transport means 14. Is temporarily pressure-bonded. As will be described later, the plurality of semiconductor cells 1 are transported by the transport means 14 while being sequentially connected in a row by repeating the temporary crimping of the lead wires 2.

  In this embodiment, a plurality of lead wires 2 temporarily crimped by the temporary crimping means 15 are simultaneously crimped to the upper and lower surfaces of the semiconductor cell 1 on the downstream side of the temporary crimping means 15 of the transport means 14. Then, three main press-bonding means 16 (shown only by a chain line in FIG. 1) are arranged at a predetermined interval. For example, when the number of the semiconductor cells 1 connected in a row is 12, the arrangement intervals of the three main crimping means 16 are arranged at intervals of 4 times, which is an integral multiple of the connection pitch P of these semiconductor cells 1. Yes.

  Then, when 12 semiconductor cells 1 are connected in a row, the three main crimping means 16 face the first, fifth and ninth semiconductor cells 1 in the transport direction, and temporarily connect these three semiconductor cells 1 to each other. The crimped lead wire 2 is finally crimped simultaneously.

  Next, when the twelve semiconductor cells 1 connected in a row are pitch-fed at a distance of P, the three main crimping means 16 are temporarily crimped to the second, sixth and tenth semiconductor cells 1. Wire 2 is crimped. By repeating such main press-bonding four times, each lead wire 2 temporarily press-bonded to twelve semiconductor cells 1 by three main press-bonding means 16 is finally press-bonded.

  On the side of the other end portion of the conveying means 14, the lead wire 2 is finally crimped by the final crimping means 16 and twelve semiconductor cells 1 connected in a row (the semiconductor cells 1 connected in a row are connected to the string 1A). A discharge means 17 (shown in FIGS. 13 and 14 as will be described later) is provided.

  The string 1A unloaded from the conveying means 14 by the discharge means 17 is stored in the stocker 19 and unloaded after the connection state of the lead wire 2 is inspected by image recognition by the inspection unit 18 shown in FIG. It has become.

Next, the configuration of each unit will be described.
As shown in FIG. 1, the supply unit 12 has a direction in which the first storage 21 and the second storage 22 intersect the transport direction of the transport means 14 (this direction is the X direction) (this direction is the Y direction). To be separated from each other. The X direction and the Y direction are indicated by arrows in FIG.

  Each storage 21, 22 has a cassette 23, and each cassette 23 is provided with the semiconductor cell 1. The cassettes 23 of the storages 21 and 22 are pitched in the + X direction, and the cassettes 23 of the one storage 21 and the other storage 22 are alternately sent in the −Y direction and the + Y direction at the ends of the storages 21 and 22, respectively. The storages 21 and 22 are positioned at the delivery position D at the center in the Y direction.

  The semiconductor cell 1 of the cassette 23 positioned at the delivery position D is sucked and delivered to the alignment stage 25 by the first delivery device 24 shown in FIG. The semiconductor cell 1 supplied and mounted on the alignment stage 25 is imaged by the camera 26 disposed above it, and the appearance inspection and position recognition are performed based on the imaging.

  If the appearance of the semiconductor cell 1 is determined to be defective, for example, due to chipping, the semiconductor cell 1 is discharged by the first delivery device 24 based on a command from a control device (not shown) and determined to be a non-defective product. Then, the first delivery device 24 alternately supplies and places the first and second sticking tables 35 and 36 (to be described later) on the tape sticking means 13. Yes.

  The cassette 23 emptied when the semiconductor cell 1 is taken out by the first delivery device 24 at the delivery position D moves in the −X direction and is ejected from its end, and then the semiconductor cell 1 is supplied to the first cassette 23. Alternatively, the operation is returned to the second storages 21 and 22, and the above-described operation is repeated.

  As shown in FIG. 6, the first delivery device 24 has a movable body 28 that is driven in the horizontal and vertical directions by an X, Y, and Z drive source 27. The movable body 28 is provided with four suction pads 29 (only two are shown) for sucking the four corners of the upper surface of the semiconductor cell 1.

  As a result, the first delivery device 24 is capable of attracting the four corners of the upper surface of the semiconductor cell 1 of the cassette 23 by the four suction pads 29 at the delivery position D and transferring and transporting the semiconductor cell 1. It can be done.

The semiconductor cell 1 whose appearance has been inspected and whose position has been recognized by the alignment stage 25 is supplied to the tape adhering means 13 by the first delivery device 24.
Note that the transfer of the semiconductor cell 1 from the alignment stage 25 to the tape adhering means 13 may be performed by using another delivery device instead of the first delivery device 24, and this is limited. It is not what is done.

  As shown in FIG. 1, the tape adhering means 13 includes a first tape adhering portion 31 and a second tape adhering having the same configuration arranged symmetrically apart from each other in the Y direction around the conveying means 14. It has a wearing part 32. The 1st, 2nd tape sticking parts 31 and 32 are comprised as shown in FIG. 2 thru | or FIG.

  That is, the tape sticking means 13 has a gantry 33 installed along the Y direction. As shown by arrows in FIG. 3, a pair of Y guide rails 34 are laid at both ends in the width direction along the X direction of the upper surface of the gantry 33. The Y guide rail 34 is provided with the first sticking table 35 and the second sticking table 36 described above so as to be movable along the Y guide rail 34.

  As shown in FIGS. 2 and 3, a connecting piece 37 is provided on the lower surface of one end in the width direction of each sticking table 35. Each connecting piece 37 is connected to an endless belt 41 stretched around a driving pulley 38 and a driven pulley 39. Each of the pair of drive pulleys 38 is rotationally driven by a motor 42.

  As a result, the first sticking table 35 can be driven back and forth between the one end portion and the central portion along the Y direction of the gantry 33, and the second sticking table 36 can be driven in the Y direction of the gantry 33. Can be driven back and forth between the other end along the center and the center. The sticking tables 35 and 36 driven in the center in the Y direction of the gantry 33 are shown by chain lines in FIG.

  As shown in FIG. 3, the first and second sticking tables 35, 36 are formed with three through holes 43 penetrating the upper and lower surfaces. These through-holes 43 are long along the X direction and are formed at predetermined intervals along the Y direction.

  As shown in FIG. 1, the said 1st tape sticking part 31 is provided in the one end part of the Y direction of the said mount, and the said 2nd tape sticking part 32 is provided in the other end part. As shown in FIG. 4, each tape sticking part 31 and 32 has the supply reel 44 arrange | positioned below the one end part along the X direction of each said sticking table 35 and 36. As shown in FIG. As shown in FIGS. 5A and 5B, the conductive tape 3 attached to the release tape 4 is wound around the supply reel 44.

  The conductive tape 3 pulled out together with the release tape 4 from the supply reel 44 forms a pair of cutting lines 3a shown in FIG. 5A by a cutting mechanism 40a made of a cutter. The pair of cutting lines 3 a are formed on the conductive tape 3 at a predetermined interval, that is, an interval corresponding to the width dimension of the semiconductor cell 1.

  The part cut | disconnected by the pair of cutting line 3a of the said electroconductive tape 3 is removed by the hollow mechanism 40, and the clearance gap C shown in FIG.5 (b) is formed. Thereby, the conductive tape 3 is divided into lengths corresponding to the width dimension of the semiconductor cell 1. Since the hollow mechanism 40 is a known technique, a detailed description thereof is omitted here.

  The conductive tape 3 divided into a predetermined length in this way is guided by the pair of guide rollers 44a together with the release tape 4 and parallel to the upper and lower surfaces of the first and second sticking tables 35 and 36. Run.

  An upper pressurizing tool 46a and a lower pressurizing tool 46b that are driven in the vertical direction by a vertical driving source 45 such as a cylinder are disposed above and below the portion where the conductive tape 3 runs in parallel.

  The semiconductor cell 1 supplied on the alignment stage 25 and visually inspected and position-recognized is positioned from the alignment stage 25 to the center of the gantry in the Y direction by the first delivery device 24. 2 is supplied and placed on the two sticking tables 35 and 36.

  When the first adhering table 35 or the second adhering table 36 on which the semiconductor cell 1 is supplied and mounted is driven from the central portion in the Y direction of the gantry to one end or the other end, the upper pressure is applied. The tool 46a and the lower pressing tool 46b are simultaneously driven in the upward direction and the downward direction.

  As a result, these pressure tools 46a and 46b are attached by pressing the portions of the conductive tape 3 separated by a predetermined length through the release tape 4 in contact with the upper and lower surfaces of the semiconductor cell 1 simultaneously. . Thereafter, the release tape 4 is peeled off from the conductive tape 3 adhered to the semiconductor cell 1 by a release roller (not shown) or the like, and taken up on the take-up reel 47.

  In other words, the semiconductor cells 1 whose appearance has been inspected and recognized by the alignment stage 25 are alternately supplied to the first sticking table 35 and the second sticking table 36, and the first tape sticking part 31 and the second tape sticking part 31. The conductive tape 3 is stuck at the tape sticking part 32.

  The first and second tape adhering portions 31 and 32 have three sets of supply reel 44, take-up reel 47 and upper and lower portions respectively arranged above and below the first and second adhering tables 35 and 36. Pressure tools 46a and 46b. Thereby, three conductive tapes 3 are respectively applied to the upper and lower surfaces of the semiconductor cell 1 by the upper and lower pressure tools 46a and 46b which are in contact with the conductive tape 3 simultaneously.

  Since the conductive tape 3 is simultaneously pressure-bonded to the upper and lower surfaces of the semiconductor cell 1, once the semiconductor cell 1 is positioned, the conductive tape 3 is precisely positioned and bonded to the upper and lower surfaces thereof. Can be worn.

  That is, in order to attach the conductive tape 3 to the upper and lower surfaces of the semiconductor cell 1, the conductive tape 3 is attached to one surface of the semiconductor cell 1, and then the semiconductor cell 1 is inverted upside down. When the conductive tape 3 is adhered to the other surface, a position shift occurs when the semiconductor cell 1 is inverted upside down, and the conductive tape 3 is precisely positioned and adhered to the upper and lower surfaces. It cannot be worn, or the complexity of the mechanism for reversing and the time required for reversing cause a decrease in productivity.

  However, as described above, by attaching the conductive tape 3 to the upper and lower surfaces of the semiconductor cell 1 at the same time, it is possible to improve the adhesion accuracy and productivity, and to simplify the mechanism. It becomes possible.

  The number of conductive tapes 3 adhered to the upper and lower surfaces of the semiconductor cell 1 is not limited to three, and may be two or four, and the number depends on the structure of the semiconductor cell 1 and the like. Is set.

  Moreover, when there are a plurality of conductive tapes 3 adhered to the upper and lower surfaces of the semiconductor cell 1, the conductive tapes 3 may be temporarily bonded to the upper and lower surfaces of the semiconductor cell 1 one by one. . In that case, a pair of supply reel 44, take-up reel 47, and upper and lower pressure tools 46a, 46b are provided in the first and second tape adhering portions 31, 32, respectively, and one conductive tape 3 is attached. What is necessary is just to stick the next electroconductive tape 3 by moving the 1st, 2nd sticking tables 35 and 36 a predetermined distance in the Y direction every time it sticks.

  In other words, each tape sticking portion 31, 32 is provided with only one set of supply reel 44, take-up reel 47, and upper and lower pressure tools 46 a, 46 b. The configuration can be simplified and downsized.

  When three conductive tapes 3 are attached to the upper and lower surfaces of the semiconductor cell 1 supplied to the first tape attaching part 31 and the second tape attaching part 32, the semiconductor cell 1 is The mounted first and second sticking tables 35 and 36 are alternately driven and positioned from one end and the other end in the Y direction of the gantry 33 to the center.

The semiconductor cell 1 on the first sticking table 35 or the second sticking table 36 positioned at the center of the gantry 33 is driven in the horizontal and vertical directions as shown in FIG. It is sucked and held by the delivery device 48 and supplied to the sticking inspection stage 49 provided between the tape sticking means 13 and the transport means 14.
Since the second delivery device 48 has the same configuration as the first delivery device 24, the same parts are denoted by the same reference numerals and description thereof is omitted.

  At the sticking inspection stage 49, the sticking state of the conductive tape 3 stuck on the upper and lower surfaces of the semiconductor cell 1, for example, whether or not there is a turn, is picked up simultaneously by the imaging camera 51 arranged in both the upper and lower directions. And inspected. If the result of imaging by the imaging camera 51 is defective, it is discharged based on a command from a control device (not shown), and if it is non-defective, it is supplied to the conveying means 14 by the second delivery device 48.

  As shown in FIG. 7 or FIG. 13, the transport means 14 has a pair of endless belts 53 spaced in the Y direction at intervals smaller than the width dimension of the semiconductor cell 1. The endless belt 53 is stretched around a driving pulley 54 and a driven pulley 55 as shown in FIG. The drive pulley 54 is rotationally driven by the motor 56 shown in FIG. 8 so that the upper surface side of the endless belt 53 travels from the −X direction toward the + X direction. The traveling direction of the endless belt 53 is indicated by an arrow + X in FIG.

  The endless belt 53 is intermittently driven at a predetermined pitch P. This pitch P is indicated by P in FIG. 13 and is the same distance as the interval between the adjacent semiconductor cells 1 connected in a row by the lead wires 2.

  As shown in FIGS. 7 and 8, the endless belt 53 has a plurality of suction holes 53a penetrating in the thickness direction at predetermined intervals along the X direction. A block 57 is provided between the upper and lower inner surfaces of the endless belt 53 such that the upper and lower surfaces thereof are in contact with the upper and lower portions of the inner peripheral surface of the endless belt 53. A suction path 58 is formed in the block 57 along the longitudinal direction.

  A plurality of branch holes 58 a opened on the upper surface of the block 57 are branched from the suction path 58 at intervals corresponding to the suction holes 53 a formed in the endless belt 53. The branch hole 58a may be formed in the lower surface of the block 57.

  One end of the suction path 58 is closed, and a suction pump 59 is connected to the other end. Accordingly, when the suction pump 59 is operated, a suction force is generated in the suction hole 53a of the endless belt 53 via the suction path 58 and the branch hole 58a.

  The interval between the suction holes 53a is set to be equal to 1 / integer of the pitch P at which the endless belt 53 is intermittently driven or the pitch P. Accordingly, the suction hole 53a of the endless belt 53 and the branch hole 58a of the block 57 are made to coincide with each other before the endless belt 53 is driven, so that the endless belt 53 always faces each other even if the endless belt 53 is intermittently driven. ing.

  In this way, when the lead wire 2 is temporarily pressure-bonded to the semiconductor cell 1 or when the lead-wire 2 is pressure-bonded, the positioned semiconductor cell 1 can be positioned and held so as not to move on the endless belt 53.

  As shown in FIG. 8, at one end portion of the endless belt 53 constituting the conveying means 14 located in the −X direction, the total constituting the temporary crimping means 15 is provided between and outside the pair of endless belts 53. Three sets of lower pressure members 60 are arranged.

  The three sets of lower pressure members 60 each include a first lower block 61 and a second lower block 62 that are spaced apart from each other at a predetermined interval in the X direction, and each block, that is, a total of six blocks 61 and 62. Are fixedly mounted on the upper surface of a mounting plate 63a that is integrally driven up and down by a vertical driving means 63 (shown in FIG. 9) such as a cylinder.

  The upper end surface of the first lower block 61 is formed as a flat first receiving surface 61a, and the upper end surface of the second lower block 62 is a second position located slightly lower than the first receiving surface 61a. It is formed on the receiving surface 62a.

  Suction holes 61b and 62b are formed in the first receiving surface 61a and the second receiving surface 62a, and suction force can be generated in the suction holes 61b and 62b by a suction pump (not shown). It is like that.

  The upper surface of each of the three lower blocks 61 and 62 is formed into a crank shape by the first to third lead wire processing means 15a to 15c disposed on the side of one end of the conveying means 14. The lead wires 2 are supplied simultaneously.

  Each lead wire processing means 15a-15c has a supply reel 65 around which the lead wire 2 is wound as shown in FIGS. 10 (a) and 10 (b). The lead wire 2 of the supply reel 65 is pinched by the pull-out claw 66 and pulled out. The lead wire 2 has a strip shape.

  The drawer pawl 66 is driven to reciprocate in the X direction indicated by an arrow in FIG. 10A by a cylinder (not shown) or a wire that runs endlessly. Accordingly, the lead wire 2 is drawn from the supply reel 65 in the −X direction.

  The lead wire 2 drawn out in the −X direction by the drawing claw 66 is a first holding portion 71 divided into a clamper 68, a first cutter 69, a first upper block 71a and a first lower block 71b. Then, a molding die 72 composed of a pair of upper and lower dies 72a and 72b, a second holding portion 73 and a second cutter 74 divided into a second upper block 73a and a second lower block 73b are passed through. A disposal box 75 is disposed downstream of the second cutter 74 in the pulling direction.

  The upper block 71a of the first holding part 71 and the second upper block 73a of the second holding part 73 of the first to third lead wire processing means 15a to 15c are attached as shown in FIGS. It is attached to the lower surface of the plate 77.

  As shown in FIG. 9, the lower end surface of the first upper block 71 a of the first holding unit 71 is set to be slightly higher than the lower end surface of the second upper block 73 a of the second holding unit 73. ing. Furthermore, the pair of upper blocks 71a and 73a are formed with suction holes 82 that open to the lower end surfaces thereof.

  The upper end surface of the first lower block 71 b of the first holding unit 71 is set to be slightly higher than the upper end surface of the second lower block 73 b of the second holding unit 73.

The mounting plate 77 is provided on the lower surface of the plate-like movable member 79 shown in FIGS. 8 and 9 so that it can be driven in the vertical direction by a plurality of vertical cylinders 81. The movable member 79 is driven in the Y direction by a horizontal cylinder 78.
The pair of upper blocks 71a and 73a also serve as an upper pressure member of the temporary pressure bonding means 15.

  From the state shown in FIG. 10A, as shown in FIG. 10B, the lead wire 2 is drawn out from the supply reels 65 of the first to third lead wire processing means 15a to 15c by the drawing pawl 66. The proximal end of the lead wire 2 on the supply reel 65 side is held by the clamper 68.

  At the same time, as shown in FIG. 8, the first and second upper blocks of the first holding part 71 and the second holding part 73 that stand by above the first to third lead wire processing means 15a to 15c. 71a, 73a is driven in the downward direction by the upper and lower cylinders 81, and the lead wire 2 drawn out by the drawing claw 66 before being formed by the suction hole 82 opened in the lower end surface of the upper blocks 71a, 73a is adsorbed. Retained.

  Next, the molding die 72 operates in the closing direction to form the inclined portion 2 s in the middle portion of the lead wire 2. At the same time, the pair of cutters 69 and 74 are operated to cut the lead wire 2 drawn from the supply reel 65 by a length corresponding to the dimension between the pair of cutters 69 and 74. A portion of the lead wire 2 on the downstream side of the second cutter 74 is discharged to the waste box 75.

  The one end portion and the other end portion of the lead wire 2 have different heights depending on the inclined portion 2s, but the difference in height is a dimension corresponding to the thickness of the semiconductor cell 1, for example, an extremely large value of about 1 mm. The dimensions are very small.

  When the forming and cutting of the lead wire 2 in the first to third lead wire processing means 15a to 15c is completed, the forming die 72 is driven in the opening direction, and then in the horizontal direction orthogonal to the lead wire 2. Driven and retracts from the vertical direction of the lead wire 2. Next, the lead wire 2 formed and processed by the lower end surfaces of the upper blocks 71a and 73a of the first and second holding portions 71 and 73 is sucked and held.

  Next, after the mounting plate 77 to which the upper blocks 71a and 73a are mounted is driven in the upward direction by the upper and lower cylinders 81, the movable member 79 to which the mounting plate 77 is mounted is driven in the -Y direction by the horizontal cylinder 78. The lead wire 2 sucked and held on the lower end surfaces of the upper blocks 71a and 73a is positioned above the first and second blocks 61 and 62 of the lower pressurizing member 60 provided at one end of the conveying means 14. The

  When the formed lead wire 2 is positioned above the first and second blocks 61 and 62 of the lower pressure member 60, the upper blocks 71a and 73a are driven in the downward direction, and FIG. The lead wire 2 (2a) molded as shown in FIG. 3 is transferred to the first and second receiving surfaces 61a and 62a, which are the upper end surfaces of the first and second blocks 61 and 62, and held by suction. .

  Thus, after the lead wire 2 is sucked and held on the first and second receiving surfaces 61a and 62a, the lead wire 2 is positioned on the second receiving surface 62a of the second lower block 62 of the lead wire 2. At the other end bent downward, as shown in FIG. 11 (b), the semiconductor cell 1 in which three conductive tapes 3 are respectively attached to the upper and lower surfaces by the second delivery device 48 is supplied and mounted. Is done.

  When the semiconductor cell 1 is supplied and placed on the other end of the lead wire 2, the first and second blocks 61 and 62 are driven in the downward direction by the vertical drive means 63 and delivered to the transport means 14. The semiconductor cell 1 having one end of the lead wire 2 (2a) adhered to the lower surface thereof by the transport means 14 is intermittently transported by a distance of the pitch P. This state is shown in FIG.

  When the semiconductor cell 1 is pitch-fed, the first lower block 61 and the second lower block 62 are driven in the upward direction by the vertical driving means 63 as shown in FIG. As a result, the semiconductor cell 1 with the other end of the lead wire 2 attached to the lower surface is raised from the endless belt 53 of the conveying means 14 by the first receiving surface 61 a of the first lower block 61. Thereafter, the next lead wire 2 (2 b) that has been molded is sucked and held by the upper blocks 71 a and 73 a of the first holding portion 71 and the second holding portion 73 and supplied.

  One end of the lead wire 2 (2b) is an upper surface of the semiconductor cell 1 that is sucked and held on the first receiving surface 61a of the first lower block 61 of the lower pressure member 60 via the lead wire 2 (2a). The other end portion is supplied to the receiving surface 62 a of the second lower block 62 of the lower pressure member 60.

  Thereby, the semiconductor cell 1 held on the receiving surface 61a of the first lower block 61 has the other end of the lead wire 2 (2a) attached to the lower surface thereof and the lead wire 2 attached to the upper surface thereof. One end of (2b) is simultaneously pressed by the receiving surface 61a of the first lower block 61 and the lower end surface of the first upper block 71. That is, the other end portion of the lead wire 2 (2a) first supplied to the upper and lower surfaces of the semiconductor cell 1 and the one end portion of the lead wire 2 (2b) supplied next are temporarily crimped simultaneously.

  When the first upper block 71a and the second upper block 73a take out the lead wire 2 formed by the first to third lead wire processing means 15a to 15c, the upper block 71a uses the upper block 71a. , 73a is set so as to be higher than the pressure when the lead wire 2 is temporarily pressure-bonded to the semiconductor cell 1.

  As a result, the lead wire 2 can be reliably taken out from each of the lead wire processing means 15a to 15c, and the pressure at which the lead wire 2 is attached to the semiconductor cell 1 is lower than that at the time of take-off at the time of provisional pressure bonding. The deviation from the tape 3 can be prevented.

  In addition, the first holding part 71 and the second holding part 73 are attached to one mounting plate 77, but each holding part 71, 73 is attached to a separate mounting plate, and each is moved by the upper and lower cylinders 81. You may make it drive up and down.

  By doing so, the gas pressure supplied to each of the upper and lower cylinders 81 is controlled so that the holding portions 71 and 73 contact the lead wire 2 with the same pressure when adsorbing the lead wire 2, and the semiconductor cell 1 is temporarily attached to the lead wire 2. When pressure bonding, the pressure of the gas supplied to the pair of upper and lower cylinders 81 is controlled so that the pressure at which the holding portions 71 and 73 pressurize the semiconductor cell 1 is optimized according to the state at that time, which will be described later. Damage to the cell 1 can be prevented.

  In this way, when the lead wires 2 (2a, 2b) are temporarily pressure-bonded to the upper surface and the lower surface of the semiconductor cell 1 supplied first, the upper blocks of the first holding unit 71 and the second holding unit 73 After 71a and 73a are raised and moved (retracted) in the + Y direction indicated by an arrow in FIG. 8, the second delivery device 48 is connected to the other end of the lead wire 2 (2b) as shown in FIG. 11 (e). Then, the next semiconductor cell 1 is supplied, and the lower surface conductive tape 3 is adhered to the lead wire 2 (2b).

  Next, after the first and second blocks 61 and 62 are driven in the downward direction and the two semiconductor cells 1 electrically connected by the lead wire 2 (2b) are transferred to the endless belt 53, FIG. As shown in (f), these semiconductor cells 1 are intermittently fed by a pitch P distance by an endless belt 53.

  Thereafter, the upper blocks 71a and 73a holding the molded lead wire 2 on the lower end surface are driven in the -Y direction and positioned above the endless belt 53 of the conveying means 14, and then driven in the downward direction. The lead wire 2 (2c) is supplied as shown by the chain line in FIG.

  One end of the lead wire 2 (2c) is positioned on the upper surface of the semiconductor cell 1 on the receiving surface 61a of the first lower block 61, and the other end is the second receiving surface of the second lower block 62. Supply positioning to 62a.

  Thereby, the other end of the lead wire 2 (2b) and one end of the lead wire 2 (2c) are connected to the lower surface and the upper surface of the semiconductor cell 1 on the receiving surface 61a of the first lower block 61. The receiving surface 61a of the first lower block 61 and the lower end surface of the first upper block 71a are pressurized and temporarily pressed.

  By repeatedly performing such provisional pressure bonding, a plurality of, for example, twelve semiconductor cells 1 are connected to the string 1A of the solar cell module in which the lead wires 2a to 2n are connected in a row as shown in FIG. Become. That is, the string 1A in a temporarily press-bonded state is obtained in which the other end portion and one end portion of the lead wire 2 are temporarily press-bonded sequentially to the lower surface and the upper surface of the semiconductor cell 1.

  Thus, if the other end portion and one end portion of the lead wire 2 are sequentially temporarily crimped to the lower surface and the upper surface of the semiconductor cell 1 to form the string 1A in a temporarily crimped state, the semiconductor cells constituting the string 1A The number of 1s can be any number, not just twelve.

  Further, as shown in FIGS. 11B, 11D and 11F, the lead wire 3 is temporarily pressure-bonded to the semiconductor cell 1 provided only in one of the first block 61 and the second block 62. In this case, as described above, if the first holding portion 71 and the second holding portion 73 are connected to the upper and lower cylinders 81 by separate mounting plates, one holding portion 71 for temporarily pressing the semiconductor cell 1 to the lead wire 2 or The pressure applied to 73 can be made smaller than the other holding part. Thereby, it is possible to prevent the semiconductor cell 1 from being excessively pressurized and damaged.

  The temporarily crimped string 1A composed of twelve semiconductor cells 1 is transported by the transport means 14, and the semiconductor cell 1 at the tip is opposed to the main crimping means 16 located at the forefront of the three final crimping means 16 in the + X direction. When the lead wire 2 is temporarily crimped to the first, fifth and ninth semiconductor cells 1, it is finally crimped simultaneously by the three permanent crimping means 16.

  As shown in FIG. 12, the main crimping means 16 includes a plate-like upper movable member 86 that is disposed above the endless belt 53 of the conveying means 14 and is driven up and down by an upper cylinder 85, and a lower cylinder 87 that is disposed below. Has a plate-like lower movable member 88 that is driven up and down.

  On the lower surface of the upper movable member 86, three upper pressurizing tools 91 heated by a heater 91a are provided at predetermined intervals which will be described later. On the upper surface of the lower movable member 88, three lower pressure tools 92 heated by a heater 92a are provided at positions corresponding to the upper pressure tool 91.

  The upper pressure tool 91 and the lower pressure tool 92 can be driven in the upward and downward directions by the cylinders 85 and 87 in two strokes.

  The pressurizing tools 91 and 92 are provided at intervals corresponding to the three lead wires 2 temporarily bonded to the upper and lower surfaces of the semiconductor cell 1. An upper cushion tape 94 is interposed between the upper pressure tool 91 and the upper surface of the semiconductor cell 1, and a lower cushion tape 95 is interposed between the lower pressure tool 92 and the lower surface of the semiconductor cell 1. .

  The cushion tapes 94 and 95 are fed out from the supply reel 96, guided by a pair of guide rollers 97, travel parallel to the upper and lower surfaces of the semiconductor cell 1, and are taken up by the take-up reel 98. .

  Although not shown in detail, the upper and lower supply reels 96, guide rollers 97, and take-up reels 98 move up and down integrally with the upper and lower pressurizing tools 91 and 92 of the main crimping means 16. It is supposed to be.

  When the string 1A is transported and the first, fifth and ninth semiconductor cells 1 are positioned with respect to the three main crimping means 16, the upper pressurizing tool 91 of each final crimping means 16 is lowered. The lower pressure tool 92 is driven in the upward direction. As a result, each of the three lead wires 2 temporarily bonded to the upper and lower surfaces of the first, fifth and ninth semiconductor cells 1 of the string 1A is heated while being pressed by the pressing tools 91 and 92. Is done.

  As a result, the conductive tape 3 with the lead wire 2 attached to the semiconductor cell 1 is melt-cured by the heat of the vertical pressurizing tools 91 and 92, so that the lead wire 2 is finally crimped to the upper and lower surfaces of the semiconductor cell 1. The That is, the lead wires 2 are finally crimped to the upper and lower surfaces of the semiconductor cell 1 simultaneously, that is, at the same timing.

  The upper and lower pressure tools 91 and 92 are driven in the upward and downward directions by the cylinders 85 and 87 at the time of the main press-bonding, and the smaller one of the two strokes is performed. Thereby, the tact time required for the main pressure bonding can be shortened.

  In this way, when the lead wire 2 is finally crimped to the first, fifth and ninth semiconductor cells 1 of the string 1A, the string 1A is intermittently conveyed by 1 pitch P. Thereby, the second, sixth and tenth semiconductor cells 1 are positioned opposite to the three main crimping means 16.

  Thereafter, the three main crimping means 16 are actuated and the lead wires 2 are finally crimped to the semiconductor cells 1, and then the string 1A is intermittently transported at a pitch P and the final crimping is performed four times in total. If it repeats, all the lead wires 2 temporarily press-bonded to the twelve semiconductor cells 1 can be finally pressure-bonded.

  In this way, the string 1A, to which all the lead wires 2 connected to the twelve semiconductor cells 1 are finally pressure-bonded, is unloaded from the transfer means 14 by the discharge means 17 and stored in the stocker 19.

  When carrying out the string 1 </ b> A by the discharge means 17, the upper pressurizing tool 91 and the lower pressurizing tool 92 of each main crimping means 16 are driven by a large stroke of each cylinder 85, 87.

  As a result, the distance between the upper pressure tool 91 and the lower pressure tool 92 can be made sufficiently large, so that the suction pad 105 of the discharge means 17 is placed between the upper pressure tool 91 and the lower pressure tool 92. It can surely get in.

  The discharge means 17 has a horizontal movable member 101 having a length corresponding to the string 1A as shown in FIG. The horizontal movable member 101 has a plurality of, for example, two horizontal cylinders 102 retracted from above the conveying means 14, that is, a position waiting above the stocker 19 indicated by a solid line in FIG. 13, and a conveying means 14 indicated by a chain line. It is driven in the Y direction between positions facing upward.

  As shown in FIGS. 13 and 14, a vertically movable member 104 is provided on the lower surface of the horizontal movable member 101 so as to be driven in the vertical direction by a plurality of vertical cylinders 103. In this vertically movable member 104, a plurality of pairs of 12 pieces of suction pads 105 (only two shown in FIG. 14) perpendicular to the axis are arranged in groups of four that hold the four corners of each semiconductor cell 1 of the string 1A. Is provided. Each suction pad 105 is connected to a suction pump (not shown) so as to generate a suction force.

  When the final crimping of the lead wires 2 of the twelve semiconductor cells 1 of the string 1A is completed, the horizontal movable member 101 is driven and positioned above the string 1A above the conveying means 14 by the horizontal cylinder 102.

  Next, the upper and lower cylinders 103 are operated to drive the vertical movable member 104 in the downward direction. As a result, the upper four corners of the twelve semiconductor cells 1 are sucked by the four suction pads 105 of each set provided on the vertically movable member 104.

  When the suction pad 105 sucks the semiconductor cell 1, the up and down movable member 104 is raised, and the horizontal movable member 101 is driven in the backward direction that is the + Y direction and positioned above the inspection unit 8. The string 1A is supplied to the inspection unit 18, where the connection state of the lead wires 2 connected to the upper and lower surfaces is inspected. After the pass / fail judgment is made by the inspection, it is stored in the stocker 19 provided in the + Y direction which is the backward direction from the inspection unit 18.

  A string 1A in which twelve semiconductor cells 1 are connected in series is ultimately required to have a preset generated power. On the other hand, the generated power of each semiconductor cell 1 varies. Therefore, the first storage 21 and the second storage 22 of the supply unit 1 are provided with the semiconductor cells 1 having different generated power.

  When a predetermined generated power string 1 </ b> A is configured, the number of semiconductor cells 1 from the first storage 21 and the semiconductor cells from the second storage 22 that are supplied to the tape attaching means 13 of the supply unit 1. By setting the number of 1 according to the required generated power of the string 1A, it is possible to configure the desired generated power string 1A.

  That is, by providing the first and second storages 21 and 22 in the supply unit 12, the generated power of the string 1A is set to the required generated power even if the output power of each semiconductor cell 1 is different. Can do.

  As described above, according to the lead wire connecting device having the above configuration, when the conductive tape 3 cut to a predetermined length is attached to the upper and lower surfaces of the semiconductor cell 1, the upper and lower surfaces of the semiconductor cell 1 are attached. I tried to do it at the same time.

  Therefore, when attaching the conductive tape 3 to the semiconductor cell 1, it can be performed without bending the semiconductor cell 1 upward or downward, thereby preventing the semiconductor cell 1 from cracking. it can. In addition, since the conductive tape 3 can be attached to the upper and lower surfaces of the semiconductor cell 1 at the same time, productivity can be improved and the apparatus configuration can be made compact as compared with the case where the conductive tape 3 is separately performed.

  When the lead wire 2 molded into a predetermined shape is temporarily press-bonded to the semiconductor cell 1 to which the conductive tape 3 is adhered, the temporary press-bonding is simultaneously performed on the upper and lower surfaces of the semiconductor cell 1. did.

  For this reason, the semiconductor cell 1 can be formed without being bent upward or downward, thereby preventing the semiconductor cell 1 from being cracked. Moreover, since the lead wires 2 can be temporarily bonded to the upper and lower surfaces of the semiconductor cell 1, productivity can be improved and the apparatus configuration can be simplified as compared with the case where the lead wires 2 are separately performed.

  When the lead wires 2 temporarily bonded to the upper and lower surfaces of the semiconductor cell 1 are finally bonded, the main bonding is simultaneously performed on the upper and lower surfaces of the semiconductor cell 1.

  For this reason, the semiconductor cell 1 can be formed without being bent upward or downward, thereby preventing the semiconductor cell 1 from being cracked. In addition, since the lead wires 2 can be main-bonded simultaneously to the upper and lower surfaces of the semiconductor cell 1, productivity can be improved and the apparatus configuration can be simplified as compared with the case where they are separately performed.

  Further, in the case of the main pressure bonding, the semiconductor cell 1 is heated to a high temperature by the heater 91a provided in the upper pressure tool 91 and the heater 92a provided in the lower pressure tool 92. There is a possibility that thermal deformation or thermal distortion occurs in 1.

  However, when the lead wire 2 is finally crimped, the upper and lower surfaces of the semiconductor cell 1 are simultaneously heated by the three upper pressure tools 91 and the lower pressure tools 92, respectively, and evenly under the same conditions. Therefore, even if the semiconductor cell 1 is heated by the pressurizing tools 91 and 92, it may be difficult to cause thermal deformation or thermal distortion.

  Further, if a plurality of semiconductor cells 1 are connected in a row at intervals of a pitch P by a lead wire 2 to form a string 1A, a plurality of main crimping means 16 disposed at intervals of an integer multiple of the pitch P of the semiconductor cells 1. Thus, the lead wires 2 connected to the plurality of semiconductor cells 1 are simultaneously subjected to main pressure bonding. Then, after the main pressure bonding, the string 1A is intermittently conveyed at the pitch P, and the main pressure bonding by the plurality of main pressure bonding means 16 is repeatedly performed a plurality of times.

  For this reason, it is possible to simultaneously and efficiently perform the final pressure bonding of the lead wires 2 temporarily bonded to the plurality of semiconductor cells 1 by the plurality of final pressure bonding means 16.

  On the other hand, the semiconductor cell 1 constituting the string 1A has a structure shown in FIGS. FIG. 16A shows the front surface of the semiconductor cell 1 on the light receiving surface side, and FIG. 16B shows the back surface. An antireflection film 111 is provided on the entire surface of the semiconductor cell 1, and a large number of finger electrodes 112 are formed on the upper surface of the antireflection film 111 with respect to a predetermined direction using, for example, a sintered conductive paste. They are formed in parallel at a predetermined interval.

  Then, on the surface of the semiconductor cell 1, the three adhesive conductive tapes 3 indicated by chain lines in FIG. In parallel, and over almost the entire length in the predetermined direction.

  One end of the lead wire 2 is connected to the surface of the semiconductor cell 1 through the three conductive tapes 3 by the temporary crimping means 15 and the permanent crimping means 16. This state is shown in FIG. That is, in order to connect one end portion of the lead wire 2 to the surface of the semiconductor cell 1, a bus bar electrode is not provided as in the prior art.

  As shown in FIG. 16B, a conductive metal film 114 such as aluminum is provided on the back surface of the semiconductor cell 1 by means such as vapor deposition. The conductive metal film 114 is removed over the entire periphery of the periphery of the semiconductor cell 1 to form a first removal portion 115 at the periphery.

  The conductive metal film 114 is a part corresponding to a part of the surface of the semiconductor cell 1 to which the three conductive tapes 3 are attached, one end and the other end of the surface along the predetermined direction. In this case, a second removal portion 116 continuous with the first removal portion 115 is formed with a width dimension substantially the same as the width dimension of the conductive tape 3. The second removal unit 116 is open to the outer periphery of the semiconductor cell 1 via the first removal unit 115.

  On the back surface of the semiconductor cell 1, the three conductive tapes 3 described above are pasted by the tape sticking means 13 at the same position as the three conductive tapes 3 stuck on the front surface side of the semiconductor cell 1. Worn. Thereby, both end portions of the three conductive tapes 3 on the back surface side are attached to the second removal portion 116 formed on the back surface of the semiconductor cell 1, and the other portions are attached to the conductive metal film 114. Worn.

  The other end of the lead wire 2 is connected to the three conductive tapes 3 on the back surface of the semiconductor cell 1 by the temporary crimping means 15 and the permanent crimping means 16 as shown in FIG. . That is, the bus bar electrode is not provided on the back surface of the semiconductor cell 1 in order to connect the other end portion of the lead wire 2 as in the prior art.

  In this way, among the plurality of semiconductor cells 1 connected in a row, the conductive tape 3 provided on the surface of a pair of adjacent semiconductor cells 1 and the conductive tape 3 provided on the back surface are connected to the lead wire 2. By connecting the one end and the other end of the string, the string 1A shown in FIG. 15A is formed.

  In this way, by connecting the pair of adjacent semiconductor cells 1 with the lead wires 2 via the conductive tape 3 without providing the bus bar electrodes on the front and back surfaces of the semiconductor cells 1, the lead wires 2 are connected to each other. Compared to the conventional case where the lead wire 2 is connected to the bus bar electrode by soldering, the bondability of the lead wire 2 can be improved.

  The conductive tape 3 for connecting the lead wire 2 to the semiconductor cell 1 is cheaper than the case of forming a silver bus bar electrode and can be easily formed by a simple process. Can be reduced and productivity can be improved.

  On the back surface of the semiconductor cell 1, both end portions of the conductive tape 3 are attached to the second removal portion 116 from which the conductive metal film 114 formed on the back surface is removed. That is, both end portions of the conductive tape 3 are directly connected to the back surface of the semiconductor cell 1.

  Therefore, even if a force in the direction of peeling from the back surface of the semiconductor cell 1 acts on the conductive tape 3 via the lead wire 2, the end portion of the lead wire 2 is peeled off from the back surface of the semiconductor cell 1 together with the conductive metal film 114. Sometimes it is difficult.

  That is, the conductive metal film 114 may be easily peeled off from the back surface of the semiconductor cell 1, but is difficult to peel off because the end of the conductive tape 3 is directly connected to the back surface of the semiconductor cell 1.

  Therefore, the connection state of the semiconductor cell 1 by the lead wire 2 is reliably maintained for a long time.

  Furthermore, since the lead wire is connected to the semiconductor cell 1 without using solder as in the prior art, the thermal effect on the semiconductor cell 1 can be reduced.

  Further, the solder does not melt and flow as a fillet in the width direction of the conductive metal film 114. For this reason, the light receiving surface of sunlight is not reduced by solder, and power generation efficiency is not reduced.

  FIGS. 17 to 19 show second to fourth embodiments of the present invention showing modifications of the structure of the back surface of the semiconductor cell 1.

  In FIG. 17, the second removal portion 116 is provided not only at both ends in the predetermined direction on the back surface of the semiconductor cell 1 but also at the midway portion. That is, one conductive tape 3 is directly connected to the back surface of the semiconductor cell 1 at three locations, both ends and midway. Thereby, the connection strength with respect to the back surface of the semiconductor cell 1 of the conductive tape 3 can be improved.

  Note that the second removal unit 116 may be provided not only at one place in the middle part but also at a plurality of places in the middle part. By doing so, the connection strength between the conductive tape 3 and the semiconductor cell 1 can be further improved.

  In FIG. 18, the width dimension of the second removal portion 116 </ b> A formed at one end portion and the other end portion of the back surface of the semiconductor cell 1 along the predetermined direction is sufficiently longer than the width dimension of the conductive tape 3. ing. For example, it is formed to have a length that is 10 times or more the width dimension of the conductive tape 3.

  As a result, the number of conductive tapes 3 provided on the back surface of the semiconductor cell 1 by directly connecting both ends thereof to the second removal portion 116A can be freely set.

  Therefore, when four or more lead wires 2 are provided on the front surface of the semiconductor cell 1 via the conductive tape 3 in order to increase the current collection efficiency, for example, the back surface is formed according to the number of the lead wires 2 provided on the front surface. The number of conductive tapes 3 provided can be increased.

  Further, since the lead wire 2 has a width of 1.5 mm and a thickness of 0.1 to 0.2 mm, for example, it is very easy to bend, but even if the lead wire 2 is connected in a bent state, the removal portion of 2 Since the width dimension of 116A is sufficiently larger than the width dimension of the conductive tape 3, not only the connection accuracy of the lead wire 2 is required to be highly accurate, but also a connection failure is not caused.

  In FIG. 19, in the structure of FIG. 18, a second removal portion 116A having the same width as the second removal portion 115A provided at both ends is formed between both ends. According to such a configuration, since the conductive tape 3 is directly connected to the back surface of the semiconductor cell 1 at three positions, both ends and midway, the connection strength of the conductive tape 3 to the back surface of the semiconductor cell 1 is improved. Can be made.

  In each embodiment, the first removal portion is formed at the periphery of the back surface of the semiconductor cell, and the second removal portion is opened to the outer periphery of the semiconductor cell through the first removal portion. The removal portion may be eliminated, and the second removal portion may be directly opened to the outer periphery of the semiconductor cell. Since the removal portion is open to the outer periphery of the semiconductor cell, the connection strength of the conductive tape at the outer peripheral end of the semiconductor cell is improved.

  In the structure of FIG. 19, the second removal unit 116 </ b> A may be provided not only at one place in the middle part but also at a plurality of places in the middle part. By doing so, the connection strength between the conductive tape 3 and the semiconductor cell 1 can be further improved.

  In addition, the upper and lower surfaces of adjacent semiconductor cells in the string are connected by three lead wires, respectively. However, depending on the type of the semiconductor cell, there are cases where two or more lead wires are connected. Also, the present invention can be applied.

  DESCRIPTION OF SYMBOLS 1 ... Semiconductor cell, 2, 2a-2n ... Lead wire, 3 ... Conductive tape, 12 ... Supply part, 13 ... Tape sticking means, 14 ... Conveyance means, 15 ... Temporary pressure bonding means, 16 ... Main pressure bonding means, 17 DESCRIPTION OF SYMBOLS ... Discharging means, 18 ... Inspection part, 24 ... 1st delivery apparatus, 25 ... Alignment stage, 31 ... 1st tape sticking part, 32 ... 2nd tape sticking part, 35 ... 1st sticking table , 36 ... second sticking table, 48 ... second delivery device, 49 ... sticking inspection stage, 53 ... endless belt (conveying means), 60 ... lower pressure member, 61 ... first lower block, 61a ... first receiving surface, 62 ... second lower block, 62a ... second receiving surface, 64a to 64c ... first to third lead wire processing means, 65 ... supply reel, 66 ... drawing claw, 68 ... Clamper, 69 ... first cutter, 71 ... first holding section, 2 ... Mold, 73 ... Second holding part, 74 ... Second cutter, 85 ... Upper cylinder, 87 ... Lower cylinder, 91 ... Upper pressure tool, 92 ... Lower pressure tool, 112 ... Finger electrode, 114: conductive metal film, 116, 116A, second removal portion.

Claims (10)

A semiconductor cell constituting a solar cell module connected in a row by a lead wire,
In the semiconductor cell, a plurality of finger electrodes are formed at a predetermined interval with respect to a predetermined direction on one surface serving as a light receiving surface,
A conductive metal film is provided on the other surface, and a removal portion from which the conductive metal film is removed is formed at one end and the other end of the other surface in a direction intersecting the predetermined direction. A semiconductor cell characterized by comprising: A solar cell module in which a plurality of semiconductor cells are connected in a row by lead wires,
In the semiconductor cell, a plurality of finger electrodes are formed at a predetermined interval with respect to a predetermined direction on one surface serving as a light receiving surface,
The other surface is provided with a conductive metal film leaving an exposed portion at one end and the other end in the direction intersecting with the plurality of finger electrodes,
One end of the lead wire is attached to one surface of one semiconductor cell of a pair of adjacent semiconductor cells among a plurality of semiconductor cells connected in a row, and the plurality of fingers are interposed via an adhesive conductive tape. Connected in a direction crossing the electrode, the other end of the lead wire is attached to the other surface of the other semiconductor cell at a position corresponding to the removal portion formed at one end and the other end of the other surface. A solar cell module, which is connected via a conductive tape. A lead wire connecting device for connecting a plurality of semiconductor cells in a row with lead wires,
A supply part of the semiconductor cell;
Tape adhering means for simultaneously adhering the adhesive conductive tape cut to a predetermined length on the upper and lower surfaces of the semiconductor cell supplied from the supply unit;
The semiconductor cell with the conductive tape adhered to the upper and lower surfaces by the tape adhering means is supplied, and the conveying means for pitch-feeding the semiconductor cells;
Lead wire processing means for forming the lead wire into a shape that bends in the vertical direction at the middle part in the longitudinal direction;
Conductives provided on the upper and lower surfaces of the semiconductor cells that are pitch-fed while holding lead wires that are formed by the lead wire processing means and are opposed to the semiconductor cells that are pitch-fed by the conveying means. Temporary crimping means for electrically connecting the upper and lower surfaces of the adjacent semiconductor cells alternately by repeating the temporary crimping of the lead wires to the adhesive tape;
The pair of upper and lower lead wires disposed at a position facing the semiconductor cell on the downstream side in the feeding direction of the semiconductor cell by the conveying means than the temporary pressure bonding means and temporarily bonded to the lower surface of the upper surface of the semiconductor cell by the temporary pressure bonding means. It has a main pressure bonding means for performing a final pressure bonding at the same time,
In the semiconductor cell, a plurality of finger electrodes are formed at a predetermined interval with respect to a predetermined direction on one surface serving as a light receiving surface,
The other surface is provided with a conductive metal film leaving an exposed portion at one end and the other end in the direction intersecting with the plurality of finger electrodes,
One end of the lead wire is connected to the plurality of finger electrodes via the conductive tape on one surface of one of the pair of adjacent semiconductor cells among the plurality of semiconductor cells connected in a row. Connected in a crossing direction, the other surface of the other semiconductor cell has the other end of the lead wire at a position corresponding to the one end of the other surface and the removal portion formed at the other end. A lead connection device for semiconductor cells, characterized in that the connection is made via a wire.   4. The semiconductor cell lead wire connecting device according to claim 3, further comprising a first tape adhering unit and a second tape adhering unit to which the semiconductor cells are alternately supplied from the supply unit.   Between the tape adhering means and the transport means, an inspection means for inspecting the quality of the adhering state of the conductive tape adhered to the semiconductor cell by the tape adhering means is provided. A lead wire connecting device for a semiconductor cell according to any one of claims 3 and 4. The temporary crimping means is
A lower portion driven in the vertical direction has a receiving surface that is disposed at a position facing the lower surface of the semiconductor cell conveyed by the conveying means and holds the lead wire formed and processed by the lead wire processing means at the upper end. A pressure member;
A receiving surface of the lower pressure member is provided by adsorbing and holding a lead wire formed by the lead wire processing means at the lower end so as to be able to be driven in the horizontal direction and the vertical direction above the semiconductor cell. The lead wire attached to the conductive tape on the upper surface and the lower surface of the semiconductor cell by the supply of the lead wire and the pitch feed of the semiconductor cell by the transport means is connected to the lower pressure member. 6. The semiconductor cell lead wire connecting device according to claim 3, wherein the semiconductor cell lead wire connecting device comprises: an upper pressurizing member that pressurizes and temporarily presses simultaneously. The main crimping means is
A lower permanent pressure bonding head provided in a position that is connected to the lower surface of the semiconductor cell that is connected in a row by the temporarily crimped lead wires and conveyed by the conveying means;
The conductive tape, which is provided on the upper surface of the semiconductor cell so as to be able to be driven in the vertical direction at a portion facing the lower main pressing head, is temporarily bonded to the upper and lower surfaces of the semiconductor cell with the lower main pressing head at the same time. The lead connection apparatus for a semiconductor cell according to any one of claims 3 to 6, further comprising: an upper main pressing head that pressurizes and press-bonds the upper main pressing head. In the transport direction of the semiconductor cells by the transport means, a plurality of main press-bonding means are arranged at an interval that is an integral multiple of the interval between the semiconductor cells connected in a row.
The transport means pitch-feeds the semiconductor cells connected in a row at the same distance as the connection interval of these semiconductor cells,
8. The plurality of final press-bonding means for simultaneously press-bonding lead wires temporarily press-bonded to the upper and lower surfaces of the plurality of semiconductor cells every time the plurality of semiconductor cells are pitch-fed. A lead wire connecting device for a semiconductor cell according to any one of the above.   8. A discharge means is provided for simultaneously sucking and discharging a plurality of semiconductor cells whose lead wires are finally press-bonded by the main press-bonding means to the side of the transport means. The lead wire connecting device for a semiconductor cell according to any one of the above. A lead wire connection method for connecting a plurality of semiconductor cells in a row by lead wires,
A step of simultaneously sticking an adhesive conductive tape to the upper and lower surfaces of the semiconductor cell;
One end of the two lead wires and the other end of the other lead wire are simultaneously temporarily crimped to the conductive tape provided on the upper and lower surfaces of the semiconductor cell, and the upper and lower surfaces of the adjacent semiconductor cells are alternated. Electrically connecting to
Comprising the step of simultaneously press-bonding a pair of upper and lower lead wires temporarily bonded to the upper surface and the lower surface of the semiconductor cell,
In the semiconductor cell, a plurality of finger electrodes are formed at a predetermined interval with respect to a predetermined direction on one surface serving as a light receiving surface,
The other surface is provided with a conductive metal film leaving an exposed portion at one end and the other end in the direction intersecting with the plurality of finger electrodes,
One end of one of the pair of adjacent semiconductor cells among the plurality of semiconductor cells connected in a row is connected to the one end of the lead wire with the plurality of finger electrodes through the conductive tape. The conductive tape is connected in a crossing direction, and the other end of the lead wire is connected to the other surface of the other semiconductor cell at a position corresponding to the removal portion formed at one end and the other end of the other surface. A method for connecting lead wires of a semiconductor cell, comprising:

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