JPWO2010150735A1 - WIRING SHEET, SOLAR CELL WITH WIRING SHEET, WIRING SHEET ROLL, SOLAR CELL MODULE, AND WIRING SHEET MANUFACTURING METHOD - Google Patents

Abstract

The n-type wiring (12) and the p-type wiring (13) are alternately arranged in a second direction (51) different from the first direction (50) to form an alternating arrangement portion (20). The plurality of alternating arrangement portions (20) are arranged in the first direction (50), and the alternating arrangement portions (20) are arranged between the alternating arrangement portions (20) adjacent to each other in the first direction (50). Connection wirings (14a, 14b) for electrically connecting the n-type wiring (12) on one side and the p-type wiring (13) on the other side of the alternate array portion (20) are arranged, and are arranged in the first direction. In the manufacturing method of a wiring sheet (10), a solar cell with a wiring sheet, a wiring sheet roll, a solar cell module, and a wiring sheet (10), wherein at least one end of (50) includes an alternating array (20). is there.

Description

  The present invention relates to a wiring sheet, a solar cell with a wiring sheet, a solar cell module, a wiring sheet roll, and a method for manufacturing a solar cell with a wiring sheet.

In recent years, development of clean energy has been demanded due to the problem of depletion of energy resources and global environmental problems such as increase of CO _{2 in} the atmosphere. It has been developed, put into practical use, and is on the path of development.

  As a solar cell constituting such a solar cell module, conventionally, for example, a pn junction is formed by diffusing impurities of a conductivity type opposite to that of a silicon substrate on a light receiving surface of a single crystal or polycrystalline silicon substrate. However, double-sided electrode type solar cells in which electrodes are formed on the light receiving surface of the silicon substrate and the back surface on the opposite side are mainly used. In recent years, so-called back electrode type solar cells in which both a p-type electrode and an n-type electrode are formed on the back surface of a silicon substrate have been developed.

  For example, in US Pat. No. 5,951,786 (Patent Document 1), a wiring having electrical conductivity is patterned on the surface of an insulating substrate, and a back electrode type solar cell is electrically connected to the wiring. Connected solar cell modules are disclosed.

US Pat. No. 5,951,786

  The solar cell module having the configuration described in Patent Document 1 can be manufactured as follows, for example.

  First, a patterned wiring is formed on the surface of a network-like insulating substrate made of, for example, a polymer material.

  Next, the electrode of the back electrode type solar battery cell is joined to the wiring patterned on the surface of the mesh-like insulating base material by using a conductive adhesive to form the back electrode type solar battery cell in a mesh shape. Electrical connection to the wiring on the surface of the insulating substrate.

  And the back electrode type solar cell electrically connected to the wiring on the surface of the mesh-like insulating base material is placed between the glass substrate and the back electrode type solar cell, and the back surface protection sheet and the back electrode type solar cell. The back electrode type solar cell is sealed in the sealing material by heat-treating the sealing material placed between the battery cells while being pressed. Thereby, a solar cell module is produced.

  Here, the sealing material flows from the mesh of the mesh-like insulating base material between the back electrode type solar battery cell and the wiring and is cured, whereby the back electrode type is provided between the glass substrate and the back surface protection sheet. The solar battery cell is sealed (see Patent Document 1, column 7, lines 13 to 28).

  In the solar cell module described in Patent Document 1, there is a problem in reliability if there is a space between the back electrode type solar cell and the insulating base material. The space is filled between the back electrode type solar cell and the insulating base material by placing the sheet-like sealing material on the insulating base material side and performing heat-compression bonding.

  However, in the solar cell module described in Patent Document 1, it is necessary to prepare the wiring sheets one by one according to the shape of the electrode of the back electrode type solar cell and the arrangement of the back electrode type solar cell, There was a problem that the manufacturing efficiency of the solar cell module was poor and the manufacturing cost was high.

  In view of the above circumstances, an object of the present invention is to provide a wiring sheet, a solar battery cell with a wiring sheet, and a wiring sheet roll capable of efficiently manufacturing a solar battery module and reducing the manufacturing cost of the solar battery module. Another object of the present invention is to provide a method for producing a solar cell module and a solar cell with a wiring sheet.

  The present invention is a wiring sheet for connecting a back electrode type solar cell in which an n-type electrode and a p-type electrode are arranged on one surface side of a semiconductor substrate, and comprising an insulating substrate, an insulating property A wiring installed on the surface of the base material, the wiring comprising a plurality of strip-shaped n-type wirings for connecting the n-type electrodes of the back electrode type solar cells, and the back electrode type solar cells. A plurality of strip-shaped p-type wirings for connecting the p-type electrodes, and connection wirings for electrically connecting the p-type wirings and the n-type wirings. And the p-type wiring each extend in the first direction, and the n-type wiring and the p-type wiring are alternately arranged in a second direction different from the first direction at an interval, thereby forming an alternating arrangement portion. A plurality of alternating arrangement portions arranged in the first direction, and arranged alternately between adjacent arrangement portions adjacent in the first direction. A wiring for electrically connecting the n-type wiring on one side of the wiring and the p-type wiring on the other side of the alternating arrangement portion, wherein at least one end in the first direction includes the alternating arrangement portion It is a sheet.

  Here, in the wiring sheet of the present invention, it is preferable that a counting pattern for counting the number of the alternating array portions is provided in the area of the wiring sheet between the alternating array portions adjacent in the first direction. .

  The present invention also includes the above wiring sheet, and a back electrode type solar cell in which an n-type electrode and a p-type electrode are arranged on one surface side of the semiconductor substrate, and for the n-type wiring sheet The wiring and the n-type electrode of the back electrode solar cell are electrically connected, and the p-type wiring of the wiring sheet and the p-type electrode of the back electrode solar cell are electrically connected. This is a solar cell with a wiring sheet.

  Here, in the solar cell with the wiring sheet of the present invention, the strip-shaped conductive members are arranged in the alternately arranged portions included in the end portions in the first direction of the wiring sheet so that the second direction is the longitudinal direction. It is preferable.

Moreover, this invention is a wiring sheet roll containing said wiring sheet.
Moreover, this invention is a solar cell module containing said photovoltaic cell with a wiring sheet.

  In addition, the present invention is a method for manufacturing the above-described wiring sheet, which includes a step of counting the number of alternately arranged portions arranged in the first direction, and a step of cutting at least the insulating substrate. It is a manufacturing method of a wiring sheet.

  Furthermore, the present invention is a method for producing a wiring sheet provided with the above-described counting pattern, which includes a step of counting the number of counting patterns and a step of cutting at least the insulating substrate. A method for manufacturing a wiring sheet.

  Here, in the method for manufacturing a wiring sheet according to the present invention, it is preferable that the step of cutting at least the insulating substrate includes a step of cutting a portion including the alternately arranged portion.

  ADVANTAGE OF THE INVENTION According to this invention, a solar cell module can be manufactured efficiently and the wiring sheet which can reduce the manufacturing cost of a solar cell module, a photovoltaic cell with a wiring sheet, a wiring sheet roll, a solar cell module, and a wiring sheet The manufacturing method of an attached photovoltaic cell can be provided.

It is the typical top view which looked at an example of the wiring sheet of the present invention from the wiring installation side. It is a typical enlarged plan view of the wiring sheet shown in FIG. FIG. 3 is a schematic cross-sectional view along III-III in FIG. 2. (A) is the typical top view which looked at another example of the alternate arrangement | sequence part of the wiring sheet of this invention from the installation side of wiring, (b) is the model along IVb-IVb of (a). FIG. It is the typical top view which looked at another example of the wiring sheet of this invention from the installation side of wiring. It is a typical enlarged plan view of the wiring sheet shown in FIG. It is a typical perspective view of an example of the wiring sheet roll of the present invention. It is a typical side view illustrating an example of the usage method of the wiring sheet roll of this invention. It is a typical top view illustrating a part of process of an example of the manufacturing method of the wiring sheet of this invention. It is a typical top view of the back surface of an example of a back electrode type photovoltaic cell used for the present invention. It is typical sectional drawing in alignment with XI-XI of FIG. (A) is a schematic top view of the back surface of the other example of the back electrode type solar cell used for this invention, (b) is typical of the back electrode type solar cell shown to (a). FIG. (A) is a schematic top view of the back surface of the other example of the back electrode type solar cell used for this invention, (b) is typical of the back electrode type solar cell shown to (a). FIG. It is a typical top view when an example of the photovoltaic cell with a wiring sheet of this invention is seen from the light-receiving surface side. It is a typical enlarged plan view of the photovoltaic cell with a wiring sheet shown in FIG. It is typical sectional drawing along XVI-XVI of the photovoltaic cell with a wiring sheet shown in FIG. (A) And (b) is typical sectional drawing illustrated about an example of the manufacturing method of the photovoltaic cell with a wiring sheet shown in FIG. (A) And (b) is typical sectional drawing illustrating an example of the manufacturing method of the solar cell module of this invention. (A) And (b) is typical sectional drawing illustrating another example of the manufacturing method of the solar cell module of this invention.

  Embodiments of the present invention will be described below. In the drawings of the present invention, the same reference numerals represent the same or corresponding parts.

<Wiring sheet>
In FIG. 1, the typical top view which looked at an example of the wiring sheet of this invention from the installation side of wiring is shown. The wiring sheet 10 includes an insulating base material 11 and wirings 16 installed on the surface of the insulating base material 11. The wiring 16 includes an alternating arrangement section 20, a first connection wiring 14a, a second connection wiring 14b, a first wiring termination section 14c, and a second wiring termination section 14d.

  Here, on the left side of the front surface of the wiring sheet 10, two alternating arrangement portions 20 are arranged in the first direction 50, and the first connection wiring 14 a is interposed between the adjacent arrangement portions 20 in the first direction 50. Are provided to electrically connect these alternate arrangement portions 20.

  One alternating array part 20 adjacent in the first direction 50 on the left side of the surface of the wiring sheet 10 is cut along the second direction 51 in the middle of the first direction 50, and the other alternating array part 20 is the first. Are electrically connected to the wiring terminal portion 14c.

  Further, also on the right side of the surface of the wiring sheet 10, the two alternating arrangement portions 20 are arranged in the first direction 50, and the second connection wiring 14 b is provided between the adjacent alternating arrangement portions 20 in the first direction 50. It is provided and these alternate arrangement parts 20 are electrically connected.

  One alternating array portion 20 adjacent in the first direction 50 on the right side of the surface of the wiring sheet 10 is cut along the second direction 51 in the middle of the first direction 50, and the other alternating array portion 20 is the second. Is electrically connected to the wiring terminal end portion 14d.

  Then, at one end portion in the first direction 50 of the wiring sheet 10, the alternately arranged portions 20 cut along the second direction 51 in the middle of the first direction 50 are arranged in the second direction 51. Thereby, the wiring sheet 10 shown in FIG. 1 includes the alternate arrangement portion 20 cut along the second direction 51 in the middle of the first direction 50 at one end portion in the first direction 50.

  In the above, the material of the insulating substrate 11 can be used without particular limitation as long as it is an electrically insulating material. For example, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), A material containing at least one resin selected from the group consisting of polyphenylene sulfide (PPS), polyvinyl fluoride (PVF) and polyimide (Polyimide) can be used.

  Moreover, the thickness of the insulating base material 11 is not specifically limited, For example, it is 25 micrometers or more and 150 micrometers or less.

  The insulating substrate 11 may have a single-layer structure consisting of only one layer or a multi-layer structure consisting of two or more layers.

  Further, the material of the wiring 16 can be used without any particular limitation as long as it is a conductive material. For example, a metal including at least one selected from the group consisting of copper, aluminum, and silver is used. Can do.

  Further, the thickness of the wiring 16 is not particularly limited, and can be, for example, 10 μm or more and 50 μm or less.

  Further, on at least a part of the surface of the wiring 16, for example, nickel (Ni), gold (Au), platinum (Pt), palladium (Pd), silver (Ag), tin (Sn), SnPb solder, and ITO You may install the electroconductive substance containing at least 1 sort (s) selected from the group which consists of (Indium Tin Oxide). In this case, there is a tendency that the electrical connection between the wiring 16 of the wiring sheet 10 and the electrode of the back electrode type solar battery cell to be described later can be improved, and the weather resistance of the wiring 16 can be improved.

  Further, at least a part of the surface of the wiring 16 may be subjected to a surface treatment such as a rust prevention treatment or a blackening treatment.

  Note that the wiring 16 may also have a single-layer structure consisting of only one layer or a multi-layer structure consisting of two or more layers.

  In addition, a count pattern 18 that is a region where the wiring 16 is not formed on the surface of the insulating base material 11 is provided at an end portion in the second direction 51 of the first connection wiring 14a. The counting pattern 18, which is a region where the wiring 16 is not formed on the surface of the insulating substrate 11, is also provided at the end of the second connection wiring 14 b in the second direction 51.

  In addition, a count pattern 18, which is a region where the wiring 16 is not formed on the surface of the insulating base material 11, is also provided at the end of the first wiring terminal portion 14 c in the second direction 51. The counting pattern 18 which is a region where the wiring 16 is not formed on the surface of the insulating base material 11 is also provided at the end of the second wiring terminal portion 14 d in the second direction 51.

  These counting patterns 18 are provided, for example, in a region outside the wiring sheet 10 and are used for counting the number of the alternately arranged portions 20. Note that the count pattern 18 provided in the first connection wiring 14 a and the second connection wiring 14 b is located in the region of the wiring sheet 10 between the alternately arranged portions 20 adjacent in the first direction 50. Yes.

  In the above description, the count pattern 18 uses a gap provided in each of the first connection wiring 14a and the second connection wiring 14b. However, the count pattern 18 is not limited to this configuration. The formation position of the count pattern 18 on the wiring sheet 10 is not particularly limited. From the viewpoint of improving the ease of forming the count pattern 18 and the ease of detection, the count pattern 18 is the first pattern. It is preferable that the connection wiring 14 a, the second connection wiring 14 b, and the insulating base material 11 be provided on at least one selected from the group consisting of the connection wiring 14 a, the second connection wiring 14 b, and the insulating substrate 11. Further, the counting pattern 18 is not limited to the gap, and a pattern made of the same material as or a different material from the wiring 16 provided on the surface of the insulating substrate 11 can be used. Further, the counting pattern 18 may be a perforation or a cut provided in the insulating substrate 11. Note that the counting pattern 18 is not necessarily formed.

  In this specification, the case where the angle formed by the first direction 50 and the second direction 51 is 90 ° will be described. However, in the present invention, the first direction 50 and the second direction 51 are different from each other. The angle between the first direction 50 and the second direction 51 may be, for example, within a range of 90 ° ± 14 °. Further, in the present specification, the first direction 50 and the second direction 51 each include any of the same direction, the opposite direction, and the bidirectional direction of the arrows in the drawings of the present invention, and are appropriately used depending on the situation. be able to.

  FIG. 2 shows a schematic enlarged plan view of the wiring sheet shown in FIG. As shown in FIG. 2, the alternating array unit 20 includes second n-type wirings 12 extending in the first direction 50 and p-type wirings 13 extending in the first direction 50 at intervals. Wiring areas arranged in the direction 51.

  In the alternating array portion 20 adjacent in the first direction 50 on the left side of the surface of the wiring sheet 10, the n-type wiring 12 of the upper left alternating array portion 20 and the p-type wiring 13 of the lower left alternating array portion 20 are first. 1 connection wiring 14a. Here, one end of each of the plurality of n-type wirings 12 is electrically connected to one end in the first direction 50 of the first connection wiring 14a. One end of each of the plurality of p-type wirings 13 is electrically connected to the other end in one direction 50.

  Moreover, in the alternate arrangement | sequence part 20 adjacent in the 1st direction 50 on the surface right side of the wiring sheet 10, the p-type wiring 13 of the upper right alternating arrangement part 20 and the n-type wiring 12 of the lower right alternating arrangement part 20 are used. Are electrically connected by the second connection wiring 14b. Here, one end of each of the plurality of p-type wirings 13 is electrically connected to one end in the first direction 50 of the second connection wiring 14b, and the second connection wiring 14b has a first end. One end of each of the plurality of n-type wirings 12 is electrically connected to the other end in one direction 50.

  The n-type wiring 12, the p-type wiring 13, the first connection wiring 14a, and the second connection wiring 14b are each conductive, and the n-type wiring 12 and the p-type wiring 13 are each in the first direction. The first connection wiring line 14 a and the second connection wiring line 14 b are each formed in a shape extending in the second direction 51. Note that the first wiring terminal portion 14 c and the second wiring terminal portion 14 d shown in FIG. 1 are also conductive and formed in shapes extending in the second direction 51, respectively.

  FIG. 3 shows a schematic cross-sectional view along III-III in FIG. Here, as shown in FIG. 3, in the wiring sheet 10, the n-type wiring 12 and the p-type wiring 13 are provided only on one surface of the insulating substrate 11, and the n-type wiring 12 is provided. And the p-type wiring 13 are alternately arranged one by one at a predetermined interval to constitute an alternating array portion 20.

  FIG. 4 (a) shows a schematic plan view of another example of the alternately arranged portions of the wiring sheet of the present invention viewed from the wiring installation side, and FIG. 4 (b) shows IVb of FIG. 4 (a). A schematic cross-sectional view along -IVb is shown.

  Also in this example, the n-type wiring 12 and the p-type wiring 13 are each formed in a strip shape extending in the first direction 50, and the first connection wiring 14a and the second connection wiring 14b are respectively It is formed in a shape that extends in two directions 51. One end of each of the plurality of n-type wirings 12 is electrically connected to the first connection wiring 14a, and one end of each of the plurality of p-type wirings 13 is connected to the second connection wiring 14b. Electrically connected. In FIGS. 4A and 4B, the count pattern 18 is not shown for convenience of explanation.

  Then, one n-type comb wiring is constituted by one first connection wiring 14a and a plurality of strip-shaped n-type wirings 12 electrically connected thereto, and one second connection One p-type comb wiring is constituted by the wiring 14b and a plurality of strip-shaped p-type wirings 13 electrically connected thereto.

  Here, one n-type comb-shaped wiring and one p-type comb-shaped wiring are arranged so that their comb teeth face each other, and the band-shaped n-type wiring corresponding to the comb teeth of the n-type comb-shaped wiring The wiring 12 and the strip-shaped p-type wiring 13 corresponding to the comb teeth of the p-type comb-shaped wiring are arranged in the second direction 51 alternately with each other, thereby forming the alternating arrangement unit 20. is doing.

  The strip-shaped n-type wiring 12 and / or the strip-shaped p-type wiring 13 may have a triangular and / or trapezoidal shape on at least a part of its surface.

  In the present invention, the concept of “alternating n-type wirings and p-type wirings” is only applicable when n-type wirings and p-type wirings are alternately arranged one by one. In addition, a case where a plurality of p-type wirings are arranged between adjacent n-type wirings and a case where a plurality of n-type wirings are arranged between adjacent p-type wirings are also included.

  In FIG. 5, the typical top view which looked at another example of the wiring sheet of this invention from the installation side of wiring is shown. In the wiring sheet 10 shown in FIG. 5, the alternate arrangement portion 20 cut along the second direction 51 in the middle of the first direction 50 at one end portion in the first direction 50 of the wiring sheet 10 has the second direction 51. The alternating array portions 20 adjacent in the second direction 51 are electrically connected by a conductive member 71.

  As a result, one end of the wiring sheet 10 includes the alternating array portion 20, and in the wiring sheet 10, the upper left alternating array portion 20 and the lower left alternating array portion 20 are electrically connected, and the lower left alternating The array unit 20 and the lower right alternate array unit 20 are electrically connected, and the lower right alternate array unit 20 and the upper right alternate array unit 20 are electrically connected. Thereby, in the wiring sheet 10 shown in FIG. 5, the alternating arrangement part 20 is electrically connected in a U-shape, and the electric power generated in the back electrode type solar cell described later is supplied to the first wiring terminal part 14c and the first wiring terminal part 14c. The two wiring terminal portions 14d can be taken out. Needless to say, the number of arrangements in the first direction 50 of the alternating arrangement unit 20 is not limited to two, and the number of arrangements in the second direction 51 is not limited to two.

  FIG. 6 shows a schematic enlarged plan view of the wiring sheet 10 shown in FIG. As shown in FIG. 6, one end portion of the wiring sheet 10 is adjacent to the n-type wiring portion formed of the n-type wiring 12 and the p-type wiring 13 cut along the second direction 51. In this configuration, the gaps between the wirings 12 and the p-type wirings 13 are alternately arranged. Then, the wiring forming portions arranged via the wiring gaps are electrically connected by the conductive member 71. When a method that requires heating, such as a method using solder, is used to connect the wiring forming portion and the conductive member 71, the coefficient of thermal expansion between the insulating substrate 11 and the wiring 16 of the wiring sheet 10 is caused by the heating. There is a concern about the occurrence of wrinkles and undulations of the wiring sheet 10 due to the difference between the two. However, since the conductive members 71 are not connected to the wiring gaps by electrically connecting the wiring formation portions arranged via the wiring gaps with the conductive members 71, a plurality of wiring gaps are formed. The wrinkles of the wiring sheet 10 can be dispersed at the portion, and the wrinkles and undulations of the wiring sheet 10 can be suppressed from increasing.

  Further, in the wiring sheet 10 shown in FIG. 5, the cut surface of the cut alternating array portion 20 at one end of the wiring sheet 10 is configured to protrude from the conductive member 71 in the first direction 50. It is good also as a structure which does not protrude from the electroconductive member 71. FIG. In this case, since the cut surfaces of the alternately arranged portions 20 can be covered with the conductive members 71, the n-type wirings 12 and the p-type wires 13 constituting the cut surfaces of the alternately arranged portions 20 are insulated bases. It can suppress that the sealing performance and insulation performance of a solar cell module fall by peeling from the material 11. FIG.

  As the conductive member 71, any conductive material can be used without particular limitation. In addition, the electrical connection between the conductive member 71 and the n-type wiring 12 and the electrical connection between the conductive member 71 and the p-type wiring 13 are each conventionally known, for example, a method using solder. The method can be used. In addition to the method using solder, the electrical connection between the conductive member 71 and the n-type wiring 12 and the electrical connection between the conductive member 71 and the p-type wiring 13 are performed by welding or the like. May be. In addition to methods that require heating, such as methods that use solder and methods that use welding, methods that do not require heating using, for example, ultrasonic waves can also be used, and when methods that do not require heating are used. In addition, it is possible to suppress the occurrence of wrinkles and undulations of the wiring sheet 10 due to the difference in thermal expansion coefficient between the insulating base material 11 and the wiring 16 of the wiring sheet 10.

<Manufacturing method of wiring sheet>
Below, an example of the manufacturing method of the wiring sheet 10 shown in FIG. 1 is demonstrated. First, an insulating substrate 11 such as a PEN film is prepared, and a conductive material such as a metal foil or a metal plate is bonded to the entire surface of one surface of the insulating substrate 11. For example, pull out a roll of insulating base material cut to a predetermined width, apply adhesive on one surface of the insulating base material, and stack a roll of metal foil cut slightly smaller than the width of the insulating base material They can be bonded together by applying pressure and heating.

  Next, the conductive material is patterned on the surface of the insulating substrate 11 by removing a part of the conductive material bonded to the surface of the insulating substrate 11 by photoetching or the like and patterning the conductive material. N-type wiring 12, p-type wiring 13, first connection wiring 14a, second connection wiring 14b, first wiring termination 14c and second wiring termination 14d made of a conductive material. The wiring 16 and the counting pattern 18 are formed.

  Next, the alternating array part 20 is cut in the second direction 51 together with the insulating base material 11 at an arbitrary position in the first direction 50 of the alternating array part 20 provided on the surface of the insulating base material 11. By cutting the alternating array part 20 in the second direction 51 in the middle of the first direction 50, the wiring sheet 10 in which an arbitrary number of alternating array parts 20 are arrayed in the first direction 50 can be produced.

  As described above, the wiring sheet 10 shown in FIG. 1 is provided with the insulating base material 11 provided with the alternately arranged portions 20 by continuously providing the wiring 16 having a predetermined pattern in the first direction 50 on the insulating base material 11. It can be produced by cutting in the second direction 51 at an arbitrary location in the first direction 50. Therefore, since it is not necessary to prepare the wiring sheets one by one in accordance with the arrangement of the back electrode type solar cells as in the prior art, the solar cell module can be efficiently manufactured, and the manufacturing cost of the solar cell module can be reduced. Can be reduced.

  Further, the wiring sheet 10 shown in FIG. 5 has the strip-like conductive members 71 in the alternate arrangement portions 20 cut at one end of the wiring sheet 10 as described above, and the longitudinal direction thereof coincides with the second direction 51. Paste as you do. Accordingly, each of the plurality of wirings composed of the n-type wiring 12 and the p-type wiring 13 cut along the second direction 51 can be electrically connected via the conductive member 71, and will be described later. The power generated in the back electrode type solar battery cell can be led to the conductive member 71 without being concentrated on the specific n type wiring 12 or p type wiring 13, and the back electrode type solar battery cell and the conductive member The electrical resistance with 71 can be reduced.

  In addition, as shown in FIG. 5, the conductive members 71 may electrically connect the alternately arranged portions 20 adjacent to each other in the second direction 51. Thereby, the alternating array parts 20 located in one end part of the wiring sheet 10 and adjacent in the second direction 51 are electrically connected to each other, and the alternating array parts 20 on the insulating base material 11 are U-shaped. Can be electrically connected to each other. Thus, the wiring sheet 10 shown in FIG. 5 can be produced.

  Alternatively, the alternately arranged portions 20 at both ends in the first direction 50 of the insulating base material 11 may be cut in the second direction 51, respectively. In this case, the strip-shaped conductive members 71 are pasted to the alternating array portions 20 at both ends so that the longitudinal direction thereof coincides with the second direction 51 and pasted to the alternating array portions 20 at one end. Alternatively, the conductive sheet 71 adjacent in the second direction 51 may be electrically connected to produce the wiring sheet 10. Also in this case, like the wiring sheet 10 shown in FIG. 5, the alternately arranged portions 20 on the insulating base material 11 can be electrically connected in a U-shape. The generated electric power is taken out from each of the other conductive members 71 not electrically connecting the adjacent conductive members 71 in the second direction 51. As a means for electrically connecting the alternating array portions 20 in a U shape, the adjacent alternating array portions 20 adjacent in the second direction 51 may be electrically connected by one conductive member 71.

<Wiring sheet roll>
In FIG. 7, the typical perspective view of an example of the wiring sheet roll of this invention is shown. Here, the wiring sheet roll is formed, for example, by winding the long wiring sheet 10 in which the wiring 16 having the shape shown in FIG. 1 is continuously formed on the surface of the insulating substrate 11 around the core 22. Has been. In addition, as the core 22, what can wind up the wiring sheet 10 can be used without particular limitation.

  An example of a method for manufacturing the wiring sheet 10 using the wiring sheet roll having the above configuration will be described below. First, as shown in the schematic side view of FIG. 8, for example, the insulating base material 11 provided with the wiring 16 is pulled out from the wiring sheet roll.

  Next, when the insulating substrate 11 is pulled out, the number of the counting patterns 18 that have passed through the detector 91 is counted by the detector 91 that can detect the counting pattern 18. Thereby, since the number of the alternating arrangement | sequence parts 20 which passed the detector 91 can be counted, the insulating base material 11 provided with the desired number of alternating arrangement | sequence parts 20 is pulled out, for example, the schematic plane of FIG. As shown in the figure, the alternating array part 20 can be cut along with the insulating base material 11 in the second direction 51 along the cutting line 61 in the middle of the first direction 50.

  Note that the number of the alternating array portions 20 may be counted regardless of the presence or absence of the counting pattern 18. For example, the number of the alternating array portions 20 may be counted by image recognition of the alternating array portions 20, and the first connection wiring 14 a and the second connection wires 20 between the alternating array portions 20 in the first direction 50 may be counted. The connection wiring 14b may be recognized and counted.

  When the wiring sheet roll having the insulating base material 11 provided with the alternating arrangement part 20 as described above is used, the wiring sheet 10 is drawn out to various lengths from the wiring sheet roll according to the required length. Since it can cut and use, it becomes possible to produce the photovoltaic cell with a wiring sheet of various magnitude | sizes, and a solar cell module using one common wiring sheet roll. Therefore, by using the wiring sheet roll having the above-described configuration, it is necessary to prepare one wiring sheet at a time according to the shape of the electrode of the back electrode type solar cell and the size of the back electrode type solar cell as in the past. Therefore, the solar cell module can be efficiently manufactured, and the manufacturing cost of the solar cell module can be reduced.

  In addition, the wiring sheet 10 shown in FIG. 5 has one strip-shaped conductive member 71 on the alternate arrangement portion 20 cut at one end of the wiring sheet 10 cut from the wiring sheet roll as described above. It can be manufactured by pasting so that the longitudinal direction thereof coincides with the second direction 51.

  Further, after both ends of the first direction 50 of the wiring sheet 10 drawn out from the wiring sheet roll in the first direction 50 are cut along the second direction 51, respectively, one end of the cut wiring sheet 10 is halfway The wiring sheet 10 may be produced by sticking one strip-shaped conductive member to the two alternating array portions 20 cut in step 1 so that the longitudinal direction thereof coincides with the second direction 51.

<Back electrode type solar cell>
In FIG. 10, the typical top view of the back surface of an example of the back electrode type photovoltaic cell used for this invention is shown. Here, in the back electrode type solar cell 30, the n-type electrode 34 and the p-type electrode 35 are each formed in a strip shape, and the strip-shaped n-type electrode 34 and the strip-shaped electrode 35 for p-type are formed. On the back surface of the semiconductor substrate 31, they are alternately arranged one by one at a predetermined interval.

  In addition, an electrode non-forming portion 38 that is a portion where the n-type electrode 34 and the p-type electrode 35 are not formed is provided on a part of the periphery of the back electrode type solar battery cell 30. The part 38 can be an alignment mark for installing the back electrode type solar cell 30 at an accurate position on the wiring sheet 10, for example.

  The shape and arrangement of the n-type electrode 34 and the p-type electrode 35 on the back surface of the back electrode type solar cell 30 are not limited to the configuration shown in FIG. 10, and the n-type wiring 12 of the wiring sheet 10. And any shape and arrangement that can be electrically connected to the p-type wiring 13.

  Further, at least part of the surface of the n-type electrode 34 and / or at least part of the surface of the p-type electrode 35 of the back electrode type solar cell 30, for example, nickel (Ni), gold (Au), Contains at least one selected from the group consisting of platinum (Pt), palladium (Pd), silver (Ag), copper (Cu), tin (Sn), SnPb solder, SnBi solder, and ITO (Indium Tin Oxide) A conductive substance may be installed. In this case, the electrical connection between the wiring 16 of the wiring sheet 10 (n-type wiring 12 and p-type wiring 13) and the electrode of the back electrode type solar cell 30 (n-type electrode 34 and p-type electrode 35). There is a tendency that the weather resistance of the electrodes (the n-type electrode 34 and the p-type electrode 35) of the back electrode type solar battery cell 30 can be improved.

  Further, at least a part of the surface of the n-type electrode 34 and / or at least a part of the surface of the p-type electrode 35 of the back electrode type solar cell 30 may be subjected to a surface treatment such as a rust prevention treatment. Good.

  FIG. 11 is a schematic cross-sectional view taken along the line XI-XI in FIG. Here, the back electrode type solar cell 30 is formed on the concave and convex surface side of the semiconductor substrate 31 such as an n-type or p type silicon substrate and the semiconductor substrate 31 serving as the light receiving surface of the back electrode type solar cell 30. The antireflection film 37 and the passivation film 36 formed on the back surface side of the semiconductor substrate 31 that is the back surface of the back electrode type solar battery cell 30 are included.

  FIG. 12 (a) shows a schematic plan view of the back surface of another example of the back electrode type solar cell used in the present invention, and FIG. 12 (b) shows the back electrode type shown in FIG. 12 (a). The typical side view of a photovoltaic cell is shown.

  Also in this example, the n-type electrode 34 and the p-type electrode 35 are each formed in a strip shape, and the strip-shaped n-type electrode 34 and the strip-shaped p-type electrode 35 are alternately spaced one by one. Opened and arranged on the semiconductor substrate 31.

  The band-shaped n-type electrode 34 and / or the band-shaped p-type electrode 35 may have a triangular and / or trapezoidal shape on at least a part of the surface thereof.

  In addition, in the present invention, the concept of “alternating n-type electrodes and p-type electrodes” is used only when n-type electrodes and p-type electrodes are alternately arranged one by one. In addition, the case where a plurality of p-type electrodes are arranged between adjacent n-type electrodes and the case where a plurality of n-type electrodes are arranged between adjacent p-type electrodes are also included.

  FIG. 13 (a) shows a schematic plan view of the back surface of another example of the back electrode type solar cell used in the present invention, and FIG. 13 (b) shows the back electrode type shown in FIG. 13 (a). The typical side view of a photovoltaic cell is shown.

  In this example, each of the n-type electrode 34 and the p-type electrode 35 is formed in a dot shape, and each of the plurality of dot-shaped electrodes 34 and the plurality of dot-shaped electrodes 35 is a straight line. Are arranged in a shape. Then, the row composed of a plurality of dot-shaped electrodes for n-type 34 and the row composed of a plurality of dot-shaped electrodes for p-type 35 are arranged alternately at intervals.

  The concept of “alignment in a straight line” is not limited to the case where the electrodes for n-type and / or p-type are arranged on a pure straight line as long as they are at least arranged in a certain direction. , At least a portion of which is arranged in a zigzag pattern. Further, the interval between the n-type electrodes in the column composed of a plurality of n-type electrodes and / or the interval between the p-type electrodes in the column composed of the plurality of p-type electrodes may not be equal.

  In addition, the concept of “an array of a plurality of n-type electrodes and a column of a plurality of p-type electrodes alternately” includes an n-type electrode column and a p-type electrode column, respectively. Not only when the electrodes are alternately arranged one by one, but also when a plurality of p-type electrode rows are arranged between adjacent n-type electrode rows, and between adjacent p-type electrode rows. The case where a plurality of n-type electrode rows are arranged is also included.

  Further, on the back side of the semiconductor substrate 31, an n-type impurity diffusion region 32 formed by diffusing an n-type impurity such as phosphorus and a p-type impurity formed by diffusing a p-type impurity such as boron, for example. Diffusion regions 33 are alternately formed at predetermined intervals, and an n-type electrode 34 is in contact with the n-type impurity diffusion region 32 through a contact hole provided in the passivation film 36 on the back surface side of the semiconductor substrate 31. A p-type electrode 35 is provided in contact with the p-type impurity diffusion region 33.

  A plurality of pn junctions are formed at the interface between the n-type impurity diffusion region 32 or the p-type impurity diffusion region 33 and the inside of the semiconductor substrate 31 on the back side of the semiconductor substrate 31 having n-type or p-type conductivity. Will be. Regardless of whether the semiconductor substrate 31 has n-type or p-type conductivity, the n-type impurity diffusion region 32 and the p-type impurity diffusion region 33 are joined to the inside of the semiconductor substrate 31, respectively. The electrode 34 and the p-type electrode 35 are respectively electrodes corresponding to a plurality of pn junctions formed on the back side of the semiconductor substrate 31.

  Further, as the semiconductor substrate 31, for example, a silicon substrate made of n-type or p-type polycrystalline silicon, single crystal silicon, or the like can be used. The semiconductor substrate 31 is preferably a single crystal in order to form a pn junction on the back side.

  Further, as the n-type electrode 34 and the p-type electrode 35, for example, an electrode made of a metal such as silver can be used.

  Further, as the passivation film 36, for example, a silicon oxide film, a silicon nitride film, or a stacked body of a silicon oxide film and a silicon nitride film can be used.

  Further, as the antireflection film 37, for example, a silicon nitride film or the like can be used.

  In the concept of the back electrode type solar cell in the present invention, both the n-type electrode 34 and the p-type electrode 35 are formed only on one surface side (back side) of the semiconductor substrate 31 described above. In addition to the above, so-called back contact solar cells (solar cell cells) such as MWT (Metal Wrap Through) cells (solar cells having a part of electrodes arranged in through holes provided in a semiconductor substrate). All of the solar cells having a structure in which current is taken out from the back surface side opposite to the light receiving surface side are included.

<Solar cell with wiring sheet>
FIG. 14 shows a schematic plan view of an example of the solar battery cell with a wiring sheet of the present invention when viewed from the light receiving surface side, and FIG. 15 shows a schematic of the solar battery cell with a wiring sheet shown in FIG. An enlarged plan view is shown, and FIG. 16 is a schematic cross-sectional view taken along line XVI-XVI of the solar cell with wiring sheet shown in FIG.

  In the following, as an example of the solar cell with a wiring sheet of the present invention, a configuration in which a plurality of back electrode type solar cells 30 shown in FIG. 10 are connected to the wiring 16 of the wiring sheet 10 shown in FIG. As will be described, it goes without saying that the configuration of the solar cell with a wiring sheet of the present invention is not limited to the configuration shown in FIGS. For example, the configuration of the solar cell with a wiring sheet of the present invention may be a configuration in which a single back electrode type solar cell is connected to a single wiring sheet.

  As shown in FIGS. 14 to 16, the solar cell with the wiring sheet shown in FIGS. 14 to 16 is connected to the back surface side of the back electrode type solar battery cell 30 shown in FIG. 10 and the wiring sheet 10 shown in FIG. 5. It is produced by installing the back electrode type solar cell 30 on the wiring sheet 10 so as to face the installation side of 16.

  Here, in the photovoltaic cell with a wiring sheet shown in FIGS. 14 to 16, as shown in FIG. 15, the alternate arrangement portion 20 located at one end of the first direction 50 of the wiring sheet 10 has the second direction. A strip-shaped conductive member 71 is arranged so that 51 is in the longitudinal direction.

  In addition, as shown in FIG. 16, the n-type electrode 34 on the back surface side of the back electrode type solar cell 30 is electrically conductive with the n-type wire 12 installed on the surface of the insulating substrate 11 of the wiring sheet 10. The p-type electrode 35 on the back surface of the insulating sheet 11 of the wiring sheet 10 is electrically connected through the adhesive 25 and the p-type electrode 35 on the back surface of the back electrode type solar battery cell 30. 13 and the conductive adhesive 25 are electrically connected.

  In addition, the connection between the wiring 16 of the wiring sheet 10 and the electrode of the back electrode type solar battery cell 30 can make the wiring 16 of the wiring sheet 10 and the electrode of the back electrode type solar battery cell 30 conductive. Therefore, the wiring 16 of the wiring sheet 10 and the electrode of the back electrode type solar battery cell 30 are not limited to the case of being electrically connected via the conductive adhesive 25 described above. It may be electrically connected by direct contact.

  An insulating resin 17 is installed in a region other than the wiring 16 of the wiring sheet 10 and the electrodes of the back electrode solar cell 30 between the wiring sheet 10 and the back electrode solar cell 30. By installing the insulating resin 17 as described above, it is possible to obtain a solar cell with a wiring sheet in which the back electrode type solar cell 30 and the wiring sheet 10 are firmly joined by the insulating resin 17.

  In the solar cell with a wiring sheet having the above-described configuration, as described above, the adjacent alternately arranged portions 20 of the wiring sheet 10 of the solar cell with the wiring sheet are electrically connected. Adjacent back electrode type solar cells 30 on the wiring sheet 10 of the solar cells are electrically connected in series.

  That is, the upper left back electrode type solar cell 30 shown in FIGS. 14 and 15 is electrically connected in series with the upper right back electrode type solar cell 30.

  And the electric current which generate | occur | produced when light injects into the light-receiving surface of the back electrode type photovoltaic cell 30 is for n type of the wiring sheet 10 from the electrode 34 for n type of the back electrode type solar cell 30 and the electrode 35 for p type. The wiring 12 and the p-type wiring 13 are taken out. The current extracted to the n-type wiring 12 and the p-type wiring 13 of the wiring sheet 10 is extracted to the outside from the first wiring terminal portion 14c and the second wiring terminal portion 14d of the wiring 16 of the wiring sheet 10. Will be.

<Method for producing photovoltaic cell with wiring sheet>
Hereinafter, an example of a method for manufacturing the solar cell with wiring sheet shown in FIGS. 14 to 16 will be described with reference to the schematic cross-sectional views of FIGS. 17 (a) and 17 (b).

  First, as shown in FIG. 17A, the wiring sheet 10 shown in FIG. 5 is prepared, and the resin containing the conductive adhesive 25 such as solder and the insulating resin 17 on the surface of the wiring 16 of the wiring sheet 10. The composition 17a is applied. Here, as the wiring sheet 10, for example, after the insulating base material 11 having a desired length is drawn from the wiring sheet roll having the above configuration, the wiring sheet 10 is provided on the surface of the insulating base material 11 together with the insulating base material 11. It is possible to use a member obtained by cutting the alternately arranged portions 20 and attaching the strip-like conductive members 71 so as to electrically connect the wirings at the ends. The conductive member 71 may be connected to the wiring sheet 10 after the back electrode type solar cells 30 described later are installed on the wiring sheet 10, and the back electrode type solar cells 30 described below are connected to the wiring sheet 10. It may be connected to the wiring sheet 10 simultaneously with the installation.

  Moreover, the coating method of the resin composition 17a is not particularly limited, and for example, screen printing, coating using a dispenser, inkjet coating, or slit coater can be used.

  The insulating resin 17 preferably contains any one of an epoxy resin, an acrylic resin, and a mixed resin of an epoxy resin and an acrylic resin. In the present invention, it is needless to say that the insulating resin 17 is not limited to epoxy resin, acrylic resin, and mixed resin of epoxy resin and acrylic resin.

  Moreover, the resin composition 17a may contain one or more conventionally known additives such as a curing agent as components other than the resin component.

  Next, as shown in FIG. 17B, the n-type electrode 34 of the back electrode type solar cell 30 is positioned on the n type wire 12 of the wiring sheet 10, and the p of the back electrode type solar cell 30. The back electrode type solar cells 30 are installed on the wiring sheet 10 so that the mold electrode 35 is positioned on the p-type wiring 13 of the wiring sheet 10.

  At this time, only the insulating resin 17 in the resin composition 17a is heated by heating the resin composition 17a so that the connection portion of the n-type electrode 34 and the n-type wiring 12 and the p-type electrode 35 and the p-type electrode are used. The conductive adhesive 25 in the resin composition 17a extends between the n-type electrode 34 and the n-type wiring 12 and p while protruding into the region between the connection portions of the wiring 13 and filling this region. They remain between the mold electrode 35 and the p-type wiring 13 and are electrically connected to each other.

  The solar cell with a wiring sheet having the configuration shown in FIGS. 14 to 16 is manufactured as described above.

  In the above, after the back electrode type solar battery cell 30 is installed on the wiring sheet 10, the insulating resin 17 is cured by heating the insulating resin 17 and / or irradiating the insulating resin 17 with light, for example. May be.

  Here, when the insulating resin 17 is cured, the insulating resin 17 itself contracts. However, the insulating resin 17 is an insulating property of the passivation film 36 of the back electrode type solar battery cell 30 and the wiring sheet 10. Since it adheres to each of the base materials 11, the bonding between the back electrode type solar cell 30 and the wiring sheet 10 becomes stronger due to the shrinkage force when the insulating resin 17 is cured.

  In addition, the electrical connection between the back electrode type solar cell 30 and the wiring sheet 10 is performed, for example, by placing the back electrode type solar cell 30 on the alternating arrangement portion 20 of the wiring 16 of the wiring sheet 10 as described above. This can be done by installing one by one. The alternating arrangement part 20 functions as a region to which the back electrode type solar cells 30 in the wiring sheet 10 can be connected.

<Solar cell module>
FIG. 18A and FIG. 18B are schematic cross-sectional views illustrating an example of the method for manufacturing the solar cell module of the present invention. Hereinafter, an example of the method for manufacturing the solar cell module of the present invention will be described with reference to FIGS. 18 (a) and 18 (b).

  In the following, as an example of the solar cell module of the present invention, a solar cell module having a configuration in which the solar cells with wiring sheets shown in FIGS. 14 to 16 are sealed in a sealing material will be described. A solar cell module having a configuration in which a solar cell with a wiring sheet using the wiring sheet 10 constituted by the alternately arranged portions 20 in which both ends of the wiring sheet 10 are cut in the middle is sealed in a sealing material is similarly sealed. It can also be sealed in a stop material to form a solar cell module.

  First, as shown to Fig.18 (a), the transparent substrate 40 provided with the sheet-like 1st transparent resin 41a in the back surface electrode type photovoltaic cell 30 side of the photovoltaic cell with a wiring sheet shown to FIGS. 14-16. And a back surface protection sheet 42 provided with a sheet-like second transparent resin 41b is installed on the wiring sheet 10 side of the solar cell with wiring sheet shown in FIGS.

  Next, the first transparent resin 41a was pressure-bonded to the back electrode type solar cell 30 of the solar cell with wiring sheet, and the second transparent resin 41b was pressure-bonded to the wiring sheet 10 of the solar cell with wiring sheet. By heat-treating in a state, the first transparent resin 41a and the second transparent resin 41b are integrated and cured. As a result, as shown in FIG. 18B, the solar cell with the wiring sheet is sealed in the sealing material 41 formed by integrating the first transparent resin 41a and the second transparent resin 41b. An example of the solar cell module of the present invention is manufactured.

  Here, when the insulating resin 17 of the solar cell with wiring sheet is cured when the first transparent resin 41a and the second transparent resin 41b are cured, first, the configuration shown in FIG. The pressure is reduced, and a gas such as air between adjacent resin compositions 17 applied in a strip shape is discharged. Next, it is preferable to soften the first transparent resin 41a to seal the gas discharge part, and subsequently to liquefy the resin composition 17a. Thereafter, the insulating resin 17, the first transparent resin 41a, and the second transparent resin 41b are cured. Accordingly, the back electrode type solar battery cell 30 and the wiring sheet 10 can be joined without mixing a gas such as air between the back electrode type solar battery cell 30 and the wiring sheet 10, and an insulating resin. Since it can suppress that 17 flows out between the back surface electrode type photovoltaic cell 30 and the wiring sheet 10, the reliability of a solar cell module can be improved.

  In addition, the crimping | compression-bonding and heat processing for sealing the photovoltaic cell with a wiring sheet in the sealing material 41 can be performed using the apparatus etc. which perform the vacuum pressure bonding and heat processing called a laminator, for example. For example, the first transparent resin 41a and the second transparent resin 41b are thermally deformed by a laminator, and the first transparent resin 41a and the second transparent resin 41b are thermally cured so that these transparent resins are integrated. A sealing material 41 is formed, and the solar cell module with the wiring sheet is encapsulated in the sealing material 41 and sealed to produce a solar cell module.

  Here, the vacuum pressure bonding is a process of pressure bonding in an atmosphere reduced in pressure from atmospheric pressure. In addition, when vacuum pressure bonding is used as the pressure bonding method, it is difficult to form a gap between the first transparent resin 41a and the second transparent resin 41b, and the first transparent resin 41a and the second transparent resin are not formed. This is preferable in that gas bubbles tend not to remain in the sealing material 41 formed integrally with 41b.

  Moreover, as the transparent substrate 40, if it is a board | substrate transparent with respect to sunlight, it can use without limitation, For example, a glass substrate etc. can be used.

  Further, as the first transparent resin 41a and the second transparent resin 41b, a resin transparent to sunlight can be used without any particular limitation, and among them, ethylene vinyl acetate resin, epoxy resin, acrylic resin, urethane It is preferable to use at least one transparent resin selected from the group consisting of resin, olefin resin, polyester resin, silicone resin, polystyrene resin, polycarbonate resin and rubber resin. In this case, since the sealing material 41 is excellent in weather resistance and has high sunlight permeability, the solar cell module output (especially, a short-circuit current or an operating current) is sufficiently strong without greatly impairing. It can be fixed to the transparent substrate 40. Thereby, it exists in the tendency which can ensure the long-term reliability of a solar cell module.

  Further, as the first transparent resin 41a and the second transparent resin 41b, the same type of transparent resin may be used, or different types of transparent resins may be used.

  The heat treatment when sealing the solar cell module in the sealing material 41 is, for example, when the first transparent resin 41a and the second transparent resin 41b are each made of an ethylene vinyl acetate (EVA) resin. For example, the first transparent resin 41a and the second transparent resin 41b can be heated to a temperature of 100 ° C. or higher and 200 ° C. or lower, respectively.

  Moreover, as the back surface protection sheet 42, any material can be used without particular limitation as long as it can protect the back surface of the sealing material 41. For example, a weather-resistant film such as PET that has been conventionally used can be used. it can.

  Further, from the viewpoint of sufficiently suppressing the permeation of water vapor and oxygen into the sealing material 41 to ensure long-term reliability, the back surface protection sheet 42 may include a metal film such as aluminum.

  Moreover, it is also possible to completely adhere the back surface protection sheet 42 such as the end face of the solar cell module to a part where it is difficult to adhere using a moisture permeation prevention tape such as a butyl rubber tape.

  Moreover, in an example of the solar cell module of the present invention manufactured as described above, a frame made of, for example, an aluminum alloy may be attached so as to surround the outer periphery of the solar cell module.

  FIGS. 19A and 19B are schematic cross-sectional views illustrating another example of the method for manufacturing the solar cell module of the present invention. Hereinafter, with reference to FIG. 19A and FIG. 19B, another example of the method for manufacturing the solar cell module of the present invention will be described. In addition, below, the solar cell module of the structure which sealed the photovoltaic cell with a wiring sheet of the structure shown in FIGS. 14-16 in the sealing material as another example of the solar cell module of this invention is demonstrated. .

  First, as shown to Fig.19 (a), while installing only the back surface protection sheet 42 in the wiring sheet 10 side of the photovoltaic cell with a wiring sheet, it is in the back electrode type solar cell 30 side of the photovoltaic cell with a wiring sheet. A transparent substrate 40 provided with a sheet-like first transparent resin 41a is installed.

  Next, as shown in FIG. 19B, the first transparent resin 41a is heat-treated in a state where the first transparent resin 41a is pressure-bonded to the back electrode type solar battery cell 30 of the solar battery cell with a wiring sheet. The solar battery cell with the wiring sheet is wrapped in the resin 41a and sealed. Thereby, an example of the solar cell module of the present invention in which the solar cell with the wiring sheet is sealed in the first transparent resin 41a is produced.

  The current generated when light enters the light receiving surface of the back electrode type solar cell 30 of the solar cell module manufactured as described above is used for the n-type electrode 34 and the p type of the back electrode type solar cell 30. The electrode 35 is taken out to the n-type wiring 12 and the p-type wiring 13 of the wiring sheet 10. Then, the current extracted to the n-type wiring 12 and the p-type wiring 13 of the wiring sheet 10 is supplied from the first wiring terminal portion 14c and the second wiring terminal portion 14d of the wiring 16 of the wiring sheet 10 to the solar cell module. It will be taken out of the outside.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  INDUSTRIAL APPLICATION This invention can be utilized for the manufacturing method of a wiring sheet, a photovoltaic cell with a wiring sheet, a wiring sheet roll, a solar cell module, and a photovoltaic cell with a wiring sheet.

  10 wiring sheet, 11 insulating substrate, 12 n-type wiring, 13 p-type wiring, 14a first connection wiring, 14b second connection wiring, 14c first wiring termination, 14d second wiring Wiring termination part, 16 wirings, 17 insulating resin, 17a resin composition, 18 counting pattern, 20 alternating arrangement part, 22 cores, 25 conductive adhesive, 30 back electrode type solar cell, 31 semiconductor substrate, 32 n Type impurity diffusion region, 33 p type impurity diffusion region, 34 n type electrode, 35 p type electrode, 36 passivation film, 37 antireflection film, 38 electrode non-formation part, 40 transparent substrate, 41 sealing material, 41a first 1 transparent resin, 41b 2nd transparent resin, 42 back surface protection sheet, 50 1st direction, 51 2nd direction, 61 cutting line, 71 electroconductive member, 91 detector.

Claims (9)

A wiring sheet (10) for connecting a back electrode type solar cell (30) in which an n-type electrode (34) and a p-type electrode (35) are arranged on one surface side of a semiconductor substrate (31). There,
An insulating substrate (11);
Wiring (16) installed on the surface of the insulating substrate (11),
The wiring (16) includes a plurality of strip-shaped wirings for n-type (12) for connecting the n-type electrode (34) of the back electrode type solar cell (30), and a back electrode type solar cell (30). ) For electrically connecting the p-type wiring (13) to the p-type wiring (13) and the n-type wiring (12). Wiring for connection (14a, 14b)
The n-type wiring (12) and the p-type wiring (13) each extend in the first direction (50),
The n-type wiring (12) and the p-type wiring (13) are alternately arranged in a second direction (51) different from the first direction (50) to be arranged alternately. )
A plurality of the alternating arrangement portions (20) are arranged in the first direction (50), and the alternating arrangement portions (20) are arranged between the alternating arrangement portions (20) adjacent to each other in the first direction (50). The connection wirings (14a, 14b) for electrically connecting the n-type wiring (12) on one side and the p-type wiring (13) on the other side of the alternating array portion (20) are disposed. And
The wiring sheet (10), wherein at least one end portion in the first direction (50) includes the alternating arrangement portion (20).   Counting pattern (18) for counting the number of the alternating array portions (20) in the area of the wiring sheet (10) between the alternating array portions (20) adjacent in the first direction (50). The wiring sheet (10) according to claim 1, wherein the wiring sheet (10) is provided. The wiring sheet (10) according to claim 1 or 2,
A back electrode solar cell (30) in which an n-type electrode (34) and a p-type electrode (35) are disposed on one surface side of the semiconductor substrate (31),
The n-type wiring (12) of the wiring sheet (10) and the n-type electrode (34) of the back electrode solar cell (30) are electrically connected,
Solar with wiring sheet, wherein the p-type wiring (13) of the wiring sheet (10) and the p-type electrode (35) of the back electrode type solar cell (30) are electrically connected. Battery cell.   In the alternate arrangement portion (20) included in the end portion in the first direction (50) of the wiring sheet (10), a strip-shaped conductive member (so that the second direction (51) is a longitudinal direction) The photovoltaic cell with a wiring sheet according to claim 3, wherein 71) is disposed.   A wiring sheet roll comprising the wiring sheet (10) according to claim 1 or 2.   A solar cell module comprising the solar cell with a wiring sheet according to claim 3 or 4. A method for manufacturing a wiring sheet (10) according to claim 1 or 2,
Counting the number of the alternating arrays (20) arranged in the first direction (50);
Cutting the insulating substrate (11) at least. A method for producing a wiring sheet (10). A method for producing a wiring sheet (10) according to claim 2, comprising:
Counting the number of the counting patterns (18);
Cutting the insulating substrate (11) at least. A method for producing a wiring sheet (10).   The wiring sheet (10) according to claim 7 or 8, wherein the step of cutting at least the insulating substrate (11) includes a step of cutting a portion including the alternating arrangement portion (20). Manufacturing method.

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